diff options
Diffstat (limited to 'linux/src/drivers/block')
| -rw-r--r-- | linux/src/drivers/block/cmd640.c | 850 | ||||
| -rw-r--r-- | linux/src/drivers/block/floppy.c | 4284 | ||||
| -rw-r--r-- | linux/src/drivers/block/genhd.c | 761 | ||||
| -rw-r--r-- | linux/src/drivers/block/ide-cd.c | 2775 | ||||
| -rw-r--r-- | linux/src/drivers/block/ide.c | 3812 | ||||
| -rw-r--r-- | linux/src/drivers/block/ide.h | 747 | ||||
| -rw-r--r-- | linux/src/drivers/block/ide_modes.h | 226 | ||||
| -rw-r--r-- | linux/src/drivers/block/rz1000.c | 59 | ||||
| -rw-r--r-- | linux/src/drivers/block/triton.c | 527 |
9 files changed, 14041 insertions, 0 deletions
diff --git a/linux/src/drivers/block/cmd640.c b/linux/src/drivers/block/cmd640.c new file mode 100644 index 00000000..b8132dcd --- /dev/null +++ b/linux/src/drivers/block/cmd640.c @@ -0,0 +1,850 @@ +/* + * linux/drivers/block/cmd640.c Version 1.02 Sep 01, 1996 + * + * Copyright (C) 1995-1996 Linus Torvalds & authors (see below) + */ + +/* + * Original author: abramov@cecmow.enet.dec.com (Igor Abramov) + * + * Maintained by: mlord@pobox.com (Mark Lord) + * with fanatical support from a legion of hackers! + * + * This file provides support for the advanced features and bugs + * of IDE interfaces using the CMD Technologies 0640 IDE interface chip. + * + * These chips are basically fucked by design, and getting this driver + * to work on every motherboard design that uses this screwed chip seems + * bloody well impossible. However, we're still trying. + * + * Version 0.97 worked for everybody. + * + * User feedback is essential. Many thanks to the beta test team: + * + * A.Hartgers@stud.tue.nl, JZDQC@CUNYVM.CUNY.edu, abramov@cecmow.enet.dec.com, + * bardj@utopia.ppp.sn.no, bart@gaga.tue.nl, bbol001@cs.auckland.ac.nz, + * chrisc@dbass.demon.co.uk, dalecki@namu26.Num.Math.Uni-Goettingen.de, + * derekn@vw.ece.cmu.edu, florian@btp2x3.phy.uni-bayreuth.de, + * flynn@dei.unipd.it, gadio@netvision.net.il, godzilla@futuris.net, + * j@pobox.com, jkemp1@mises.uni-paderborn.de, jtoppe@hiwaay.net, + * kerouac@ssnet.com, meskes@informatik.rwth-aachen.de, hzoli@cs.elte.hu, + * peter@udgaard.isgtec.com, phil@tazenda.demon.co.uk, roadcapw@cfw.com, + * s0033las@sun10.vsz.bme.hu, schaffer@tam.cornell.edu, sjd@slip.net, + * steve@ei.org, ulrpeg@bigcomm.gun.de, ism@tardis.ed.ac.uk, mack@cray.com + * liug@mama.indstate.edu, and others. + * + * Version 0.01 Initial version, hacked out of ide.c, + * and #include'd rather than compiled separately. + * This will get cleaned up in a subsequent release. + * + * Version 0.02 Fixes for vlb initialization code, enable prefetch + * for versions 'B' and 'C' of chip by default, + * some code cleanup. + * + * Version 0.03 Added reset of secondary interface, + * and black list for devices which are not compatible + * with prefetch mode. Separate function for setting + * prefetch is added, possibly it will be called some + * day from ioctl processing code. + * + * Version 0.04 Now configs/compiles separate from ide.c + * + * Version 0.05 Major rewrite of interface timing code. + * Added new function cmd640_set_mode to set PIO mode + * from ioctl call. New drives added to black list. + * + * Version 0.06 More code cleanup. Prefetch is enabled only for + * detected hard drives, not included in prefetch + * black list. + * + * Version 0.07 Changed to more conservative drive tuning policy. + * Unknown drives, which report PIO < 4 are set to + * (reported_PIO - 1) if it is supported, or to PIO0. + * List of known drives extended by info provided by + * CMD at their ftp site. + * + * Version 0.08 Added autotune/noautotune support. + * + * Version 0.09 Try to be smarter about 2nd port enabling. + * Version 0.10 Be nice and don't reset 2nd port. + * Version 0.11 Try to handle more wierd situations. + * + * Version 0.12 Lots of bug fixes from Laszlo Peter + * irq unmasking disabled for reliability. + * try to be even smarter about the second port. + * tidy up source code formatting. + * Version 0.13 permit irq unmasking again. + * Version 0.90 massive code cleanup, some bugs fixed. + * defaults all drives to PIO mode0, prefetch off. + * autotune is OFF by default, with compile time flag. + * prefetch can be turned OFF/ON using "hdparm -p8/-p9" + * (requires hdparm-3.1 or newer) + * Version 0.91 first release to linux-kernel list. + * Version 0.92 move initial reg dump to separate callable function + * change "readahead" to "prefetch" to avoid confusion + * Version 0.95 respect original BIOS timings unless autotuning. + * tons of code cleanup and rearrangement. + * added CONFIG_BLK_DEV_CMD640_ENHANCED option + * prevent use of unmask when prefetch is on + * Version 0.96 prevent use of io_32bit when prefetch is off + * Version 0.97 fix VLB secondary interface for sjd@slip.net + * other minor tune-ups: 0.96 was very good. + * Version 0.98 ignore PCI version when disabled by BIOS + * Version 0.99 display setup/active/recovery clocks with PIO mode + * Version 1.00 Mmm.. cannot depend on PCMD_ENA in all systems + * Version 1.01 slow/fast devsel can be selected with "hdparm -p6/-p7" + * ("fast" is necessary for 32bit I/O in some systems) + * Version 1.02 fix bug that resulted in slow "setup times" + * (patch courtesy of Zoltan Hidvegi) + */ + +#undef REALLY_SLOW_IO /* most systems can safely undef this */ +#define CMD640_PREFETCH_MASKS 1 + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/blkdev.h> +#include <linux/hdreg.h> +#include <asm/io.h> +#include "ide.h" +#include "ide_modes.h" + +/* + * This flag is set in ide.c by the parameter: ide0=cmd640_vlb + */ +int cmd640_vlb = 0; + +/* + * CMD640 specific registers definition. + */ + +#define VID 0x00 +#define DID 0x02 +#define PCMD 0x04 +#define PCMD_ENA 0x01 +#define PSTTS 0x06 +#define REVID 0x08 +#define PROGIF 0x09 +#define SUBCL 0x0a +#define BASCL 0x0b +#define BaseA0 0x10 +#define BaseA1 0x14 +#define BaseA2 0x18 +#define BaseA3 0x1c +#define INTLINE 0x3c +#define INPINE 0x3d + +#define CFR 0x50 +#define CFR_DEVREV 0x03 +#define CFR_IDE01INTR 0x04 +#define CFR_DEVID 0x18 +#define CFR_AT_VESA_078h 0x20 +#define CFR_DSA1 0x40 +#define CFR_DSA0 0x80 + +#define CNTRL 0x51 +#define CNTRL_DIS_RA0 0x40 +#define CNTRL_DIS_RA1 0x80 +#define CNTRL_ENA_2ND 0x08 + +#define CMDTIM 0x52 +#define ARTTIM0 0x53 +#define DRWTIM0 0x54 +#define ARTTIM1 0x55 +#define DRWTIM1 0x56 +#define ARTTIM23 0x57 +#define ARTTIM23_DIS_RA2 0x04 +#define ARTTIM23_DIS_RA3 0x08 +#define DRWTIM23 0x58 +#define BRST 0x59 + +/* + * Registers and masks for easy access by drive index: + */ +static byte prefetch_regs[4] = {CNTRL, CNTRL, ARTTIM23, ARTTIM23}; +static byte prefetch_masks[4] = {CNTRL_DIS_RA0, CNTRL_DIS_RA1, ARTTIM23_DIS_RA2, ARTTIM23_DIS_RA3}; + +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + +static byte arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23}; +static byte drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM23, DRWTIM23}; + +/* + * Current cmd640 timing values for each drive. + * The defaults for each are the slowest possible timings. + */ +static byte setup_counts[4] = {4, 4, 4, 4}; /* Address setup count (in clocks) */ +static byte active_counts[4] = {16, 16, 16, 16}; /* Active count (encoded) */ +static byte recovery_counts[4] = {16, 16, 16, 16}; /* Recovery count (encoded) */ + +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + +/* + * These are initialized to point at the devices we control + */ +static ide_hwif_t *cmd_hwif0, *cmd_hwif1; +static ide_drive_t *cmd_drives[4]; + +/* + * Interface to access cmd640x registers + */ +static unsigned int cmd640_key; +static void (*put_cmd640_reg)(unsigned short reg, byte val); +static byte (*get_cmd640_reg)(unsigned short reg); + +/* + * This is read from the CFR reg, and is used in several places. + */ +static unsigned int cmd640_chip_version; + +/* + * The CMD640x chip does not support DWORD config write cycles, but some + * of the BIOSes use them to implement the config services. + * Therefore, we must use direct IO instead. + */ + +/* PCI method 1 access */ + +static void put_cmd640_reg_pci1 (unsigned short reg, byte val) +{ + unsigned long flags; + + save_flags(flags); + cli(); + outl_p((reg & 0xfc) | cmd640_key, 0xcf8); + outb_p(val, (reg & 3) | 0xcfc); + restore_flags(flags); +} + +static byte get_cmd640_reg_pci1 (unsigned short reg) +{ + byte b; + unsigned long flags; + + save_flags(flags); + cli(); + outl_p((reg & 0xfc) | cmd640_key, 0xcf8); + b = inb_p((reg & 3) | 0xcfc); + restore_flags(flags); + return b; +} + +/* PCI method 2 access (from CMD datasheet) */ + +static void put_cmd640_reg_pci2 (unsigned short reg, byte val) +{ + unsigned long flags; + + save_flags(flags); + cli(); + outb_p(0x10, 0xcf8); + outb_p(val, cmd640_key + reg); + outb_p(0, 0xcf8); + restore_flags(flags); +} + +static byte get_cmd640_reg_pci2 (unsigned short reg) +{ + byte b; + unsigned long flags; + + save_flags(flags); + cli(); + outb_p(0x10, 0xcf8); + b = inb_p(cmd640_key + reg); + outb_p(0, 0xcf8); + restore_flags(flags); + return b; +} + +/* VLB access */ + +static void put_cmd640_reg_vlb (unsigned short reg, byte val) +{ + unsigned long flags; + + save_flags(flags); + cli(); + outb_p(reg, cmd640_key); + outb_p(val, cmd640_key + 4); + restore_flags(flags); +} + +static byte get_cmd640_reg_vlb (unsigned short reg) +{ + byte b; + unsigned long flags; + + save_flags(flags); + cli(); + outb_p(reg, cmd640_key); + b = inb_p(cmd640_key + 4); + restore_flags(flags); + return b; +} + +static int match_pci_cmd640_device (void) +{ + const byte ven_dev[4] = {0x95, 0x10, 0x40, 0x06}; + unsigned int i; + for (i = 0; i < 4; i++) { + if (get_cmd640_reg(i) != ven_dev[i]) + return 0; + } +#ifdef STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT + if ((get_cmd640_reg(PCMD) & PCMD_ENA) == 0) { + printk("ide: cmd640 on PCI disabled by BIOS\n"); + return 0; + } +#endif /* STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT */ + return 1; /* success */ +} + +/* + * Probe for CMD640x -- pci method 1 + */ +static int probe_for_cmd640_pci1 (void) +{ + get_cmd640_reg = get_cmd640_reg_pci1; + put_cmd640_reg = put_cmd640_reg_pci1; + for (cmd640_key = 0x80000000; cmd640_key <= 0x8000f800; cmd640_key += 0x800) { + if (match_pci_cmd640_device()) + return 1; /* success */ + } + return 0; +} + +/* + * Probe for CMD640x -- pci method 2 + */ +static int probe_for_cmd640_pci2 (void) +{ + get_cmd640_reg = get_cmd640_reg_pci2; + put_cmd640_reg = put_cmd640_reg_pci2; + for (cmd640_key = 0xc000; cmd640_key <= 0xcf00; cmd640_key += 0x100) { + if (match_pci_cmd640_device()) + return 1; /* success */ + } + return 0; +} + +/* + * Probe for CMD640x -- vlb + */ +static int probe_for_cmd640_vlb (void) +{ + byte b; + + get_cmd640_reg = get_cmd640_reg_vlb; + put_cmd640_reg = put_cmd640_reg_vlb; + cmd640_key = 0x178; + b = get_cmd640_reg(CFR); + if (b == 0xff || b == 0x00 || (b & CFR_AT_VESA_078h)) { + cmd640_key = 0x78; + b = get_cmd640_reg(CFR); + if (b == 0xff || b == 0x00 || !(b & CFR_AT_VESA_078h)) + return 0; + } + return 1; /* success */ +} + +/* + * Returns 1 if an IDE interface/drive exists at 0x170, + * Returns 0 otherwise. + */ +static int secondary_port_responding (void) +{ + unsigned long flags; + + save_flags(flags); + cli(); + + outb_p(0x0a, 0x170 + IDE_SELECT_OFFSET); /* select drive0 */ + udelay(100); + if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x0a) { + outb_p(0x1a, 0x170 + IDE_SELECT_OFFSET); /* select drive1 */ + udelay(100); + if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x1a) { + restore_flags(flags); + return 0; /* nothing responded */ + } + } + restore_flags(flags); + return 1; /* success */ +} + +#ifdef CMD640_DUMP_REGS +/* + * Dump out all cmd640 registers. May be called from ide.c + */ +void cmd640_dump_regs (void) +{ + unsigned int reg = cmd640_vlb ? 0x50 : 0x00; + + /* Dump current state of chip registers */ + printk("ide: cmd640 internal register dump:"); + for (; reg <= 0x59; reg++) { + if (!(reg & 0x0f)) + printk("\n%04x:", reg); + printk(" %02x", get_cmd640_reg(reg)); + } + printk("\n"); +} +#endif + +/* + * Check whether prefetch is on for a drive, + * and initialize the unmask flags for safe operation. + */ +static void check_prefetch (unsigned int index) +{ + ide_drive_t *drive = cmd_drives[index]; + byte b = get_cmd640_reg(prefetch_regs[index]); + + if (b & prefetch_masks[index]) { /* is prefetch off? */ + drive->no_unmask = 0; + drive->no_io_32bit = 1; + drive->io_32bit = 0; + } else { +#if CMD640_PREFETCH_MASKS + drive->no_unmask = 1; + drive->unmask = 0; +#endif + drive->no_io_32bit = 0; + } +} + +/* + * Figure out which devices we control + */ +static void setup_device_ptrs (void) +{ + unsigned int i; + + cmd_hwif0 = &ide_hwifs[0]; /* default, if not found below */ + cmd_hwif1 = &ide_hwifs[1]; /* default, if not found below */ + for (i = 0; i < MAX_HWIFS; i++) { + ide_hwif_t *hwif = &ide_hwifs[i]; + if (hwif->chipset == ide_unknown || hwif->chipset == ide_generic) { + if (hwif->io_base == 0x1f0) + cmd_hwif0 = hwif; + else if (hwif->io_base == 0x170) + cmd_hwif1 = hwif; + } + } + cmd_drives[0] = &cmd_hwif0->drives[0]; + cmd_drives[1] = &cmd_hwif0->drives[1]; + cmd_drives[2] = &cmd_hwif1->drives[0]; + cmd_drives[3] = &cmd_hwif1->drives[1]; +} + +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + +/* + * Sets prefetch mode for a drive. + */ +static void set_prefetch_mode (unsigned int index, int mode) +{ + ide_drive_t *drive = cmd_drives[index]; + int reg = prefetch_regs[index]; + byte b; + unsigned long flags; + + save_flags(flags); + cli(); + b = get_cmd640_reg(reg); + if (mode) { /* want prefetch on? */ +#if CMD640_PREFETCH_MASKS + drive->no_unmask = 1; + drive->unmask = 0; +#endif + drive->no_io_32bit = 0; + b &= ~prefetch_masks[index]; /* enable prefetch */ + } else { + drive->no_unmask = 0; + drive->no_io_32bit = 1; + drive->io_32bit = 0; + b |= prefetch_masks[index]; /* disable prefetch */ + } + put_cmd640_reg(reg, b); + restore_flags(flags); +} + +/* + * Dump out current drive clocks settings + */ +static void display_clocks (unsigned int index) +{ + byte active_count, recovery_count; + + active_count = active_counts[index]; + if (active_count == 1) + ++active_count; + recovery_count = recovery_counts[index]; + if (active_count > 3 && recovery_count == 1) + ++recovery_count; + if (cmd640_chip_version > 1) + recovery_count += 1; /* cmd640b uses (count + 1)*/ + printk(", clocks=%d/%d/%d\n", setup_counts[index], active_count, recovery_count); +} + +/* + * Pack active and recovery counts into single byte representation + * used by controller + */ +inline static byte pack_nibbles (byte upper, byte lower) +{ + return ((upper & 0x0f) << 4) | (lower & 0x0f); +} + +/* + * This routine retrieves the initial drive timings from the chipset. + */ +static void retrieve_drive_counts (unsigned int index) +{ + byte b; + + /* + * Get the internal setup timing, and convert to clock count + */ + b = get_cmd640_reg(arttim_regs[index]) & ~0x3f; + switch (b) { + case 0x00: b = 4; break; + case 0x80: b = 3; break; + case 0x40: b = 2; break; + default: b = 5; break; + } + setup_counts[index] = b; + + /* + * Get the active/recovery counts + */ + b = get_cmd640_reg(drwtim_regs[index]); + active_counts[index] = (b >> 4) ? (b >> 4) : 0x10; + recovery_counts[index] = (b & 0x0f) ? (b & 0x0f) : 0x10; +} + + +/* + * This routine writes the prepared setup/active/recovery counts + * for a drive into the cmd640 chipset registers to active them. + */ +static void program_drive_counts (unsigned int index) +{ + unsigned long flags; + byte setup_count = setup_counts[index]; + byte active_count = active_counts[index]; + byte recovery_count = recovery_counts[index]; + + /* + * Set up address setup count and drive read/write timing registers. + * Primary interface has individual count/timing registers for + * each drive. Secondary interface has one common set of registers, + * so we merge the timings, using the slowest value for each timing. + */ + if (index > 1) { + unsigned int mate; + if (cmd_drives[mate = index ^ 1]->present) { + if (setup_count < setup_counts[mate]) + setup_count = setup_counts[mate]; + if (active_count < active_counts[mate]) + active_count = active_counts[mate]; + if (recovery_count < recovery_counts[mate]) + recovery_count = recovery_counts[mate]; + } + } + + /* + * Convert setup_count to internal chipset representation + */ + switch (setup_count) { + case 4: setup_count = 0x00; break; + case 3: setup_count = 0x80; break; + case 1: + case 2: setup_count = 0x40; break; + default: setup_count = 0xc0; /* case 5 */ + } + + /* + * Now that everything is ready, program the new timings + */ + save_flags (flags); + cli(); + /* + * Program the address_setup clocks into ARTTIM reg, + * and then the active/recovery counts into the DRWTIM reg + * (this converts counts of 16 into counts of zero -- okay). + */ + setup_count |= get_cmd640_reg(arttim_regs[index]) & 0x3f; + put_cmd640_reg(arttim_regs[index], setup_count); + put_cmd640_reg(drwtim_regs[index], pack_nibbles(active_count, recovery_count)); + restore_flags(flags); +} + +/* + * Set a specific pio_mode for a drive + */ +static void cmd640_set_mode (unsigned int index, byte pio_mode, unsigned int cycle_time) +{ + int setup_time, active_time, recovery_time, clock_time; + byte setup_count, active_count, recovery_count, recovery_count2, cycle_count; + int bus_speed = ide_system_bus_speed(); + + if (pio_mode > 5) + pio_mode = 5; + setup_time = ide_pio_timings[pio_mode].setup_time; + active_time = ide_pio_timings[pio_mode].active_time; + recovery_time = cycle_time - (setup_time + active_time); + clock_time = 1000 / bus_speed; + cycle_count = (cycle_time + clock_time - 1) / clock_time; + + setup_count = (setup_time + clock_time - 1) / clock_time; + + active_count = (active_time + clock_time - 1) / clock_time; + if (active_count < 2) + active_count = 2; /* minimum allowed by cmd640 */ + + recovery_count = (recovery_time + clock_time - 1) / clock_time; + recovery_count2 = cycle_count - (setup_count + active_count); + if (recovery_count2 > recovery_count) + recovery_count = recovery_count2; + if (recovery_count < 2) + recovery_count = 2; /* minimum allowed by cmd640 */ + if (recovery_count > 17) { + active_count += recovery_count - 17; + recovery_count = 17; + } + if (active_count > 16) + active_count = 16; /* maximum allowed by cmd640 */ + if (cmd640_chip_version > 1) + recovery_count -= 1; /* cmd640b uses (count + 1)*/ + if (recovery_count > 16) + recovery_count = 16; /* maximum allowed by cmd640 */ + + setup_counts[index] = setup_count; + active_counts[index] = active_count; + recovery_counts[index] = recovery_count; + + /* + * In a perfect world, we might set the drive pio mode here + * (using WIN_SETFEATURE) before continuing. + * + * But we do not, because: + * 1) this is the wrong place to do it (proper is do_special() in ide.c) + * 2) in practice this is rarely, if ever, necessary + */ + program_drive_counts (index); +} + +/* + * Drive PIO mode selection: + */ +static void cmd640_tune_drive (ide_drive_t *drive, byte mode_wanted) +{ + byte b; + ide_pio_data_t d; + unsigned int index = 0; + + while (drive != cmd_drives[index]) { + if (++index > 3) { + printk("%s: bad news in cmd640_tune_drive\n", drive->name); + return; + } + } + switch (mode_wanted) { + case 6: /* set fast-devsel off */ + case 7: /* set fast-devsel on */ + mode_wanted &= 1; + b = get_cmd640_reg(CNTRL) & ~0x27; + if (mode_wanted) + b |= 0x27; + put_cmd640_reg(CNTRL, b); + printk("%s: %sabled cmd640 fast host timing (devsel)\n", drive->name, mode_wanted ? "en" : "dis"); + return; + + case 8: /* set prefetch off */ + case 9: /* set prefetch on */ + mode_wanted &= 1; + set_prefetch_mode(index, mode_wanted); + printk("%s: %sabled cmd640 prefetch\n", drive->name, mode_wanted ? "en" : "dis"); + return; + } + + (void) ide_get_best_pio_mode (drive, mode_wanted, 5, &d); + cmd640_set_mode (index, d.pio_mode, d.cycle_time); + + printk ("%s: selected cmd640 PIO mode%d (%dns) %s/IORDY%s", + drive->name, + d.pio_mode, + d.cycle_time, + d.use_iordy ? "w" : "wo", + d.overridden ? " (overriding vendor mode)" : ""); + display_clocks(index); +} + +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + +/* + * Probe for a cmd640 chipset, and initialize it if found. Called from ide.c + */ +int ide_probe_for_cmd640x (void) +{ +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + int second_port_toggled = 0; +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + int second_port_cmd640 = 0; + const char *bus_type, *port2; + unsigned int index; + byte b, cfr; + + if (cmd640_vlb && probe_for_cmd640_vlb()) { + bus_type = "VLB"; + } else { + cmd640_vlb = 0; + if (probe_for_cmd640_pci1()) + bus_type = "PCI (type1)"; + else if (probe_for_cmd640_pci2()) + bus_type = "PCI (type2)"; + else + return 0; + } + /* + * Undocumented magic (there is no 0x5b reg in specs) + */ + put_cmd640_reg(0x5b, 0xbd); + if (get_cmd640_reg(0x5b) != 0xbd) { + printk("ide: cmd640 init failed: wrong value in reg 0x5b\n"); + return 0; + } + put_cmd640_reg(0x5b, 0); + +#ifdef CMD640_DUMP_REGS + CMD640_DUMP_REGS; +#endif + + /* + * Documented magic begins here + */ + cfr = get_cmd640_reg(CFR); + cmd640_chip_version = cfr & CFR_DEVREV; + if (cmd640_chip_version == 0) { + printk ("ide: bad cmd640 revision: %d\n", cmd640_chip_version); + return 0; + } + + /* + * Initialize data for primary port + */ + setup_device_ptrs (); + printk("%s: buggy cmd640%c interface on %s, config=0x%02x\n", + cmd_hwif0->name, 'a' + cmd640_chip_version - 1, bus_type, cfr); + cmd_hwif0->chipset = ide_cmd640; +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + cmd_hwif0->tuneproc = &cmd640_tune_drive; +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + + /* + * Ensure compatibility by always using the slowest timings + * for access to the drive's command register block, + * and reset the prefetch burstsize to default (512 bytes). + * + * Maybe we need a way to NOT do these on *some* systems? + */ + put_cmd640_reg(CMDTIM, 0); + put_cmd640_reg(BRST, 0x40); + + /* + * Try to enable the secondary interface, if not already enabled + */ + if (cmd_hwif1->noprobe) { + port2 = "not probed"; + } else { + b = get_cmd640_reg(CNTRL); + if (secondary_port_responding()) { + if ((b & CNTRL_ENA_2ND)) { + second_port_cmd640 = 1; + port2 = "okay"; + } else if (cmd640_vlb) { + second_port_cmd640 = 1; + port2 = "alive"; + } else + port2 = "not cmd640"; + } else { + put_cmd640_reg(CNTRL, b ^ CNTRL_ENA_2ND); /* toggle the bit */ + if (secondary_port_responding()) { + second_port_cmd640 = 1; +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + second_port_toggled = 1; +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + port2 = "enabled"; + } else { + put_cmd640_reg(CNTRL, b); /* restore original setting */ + port2 = "not responding"; + } + } + } + + /* + * Initialize data for secondary cmd640 port, if enabled + */ + if (second_port_cmd640) { + cmd_hwif0->serialized = 1; + cmd_hwif1->serialized = 1; + cmd_hwif1->chipset = ide_cmd640; +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + cmd_hwif1->tuneproc = &cmd640_tune_drive; +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + } + printk("%s: %sserialized, secondary interface %s\n", cmd_hwif1->name, + cmd_hwif0->serialized ? "" : "not ", port2); + + /* + * Establish initial timings/prefetch for all drives. + * Do not unnecessarily disturb any prior BIOS setup of these. + */ + for (index = 0; index < (2 + (second_port_cmd640 << 1)); index++) { + ide_drive_t *drive = cmd_drives[index]; +#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED + if (drive->autotune || ((index > 1) && second_port_toggled)) { + /* + * Reset timing to the slowest speed and turn off prefetch. + * This way, the drive identify code has a better chance. + */ + setup_counts [index] = 4; /* max possible */ + active_counts [index] = 16; /* max possible */ + recovery_counts [index] = 16; /* max possible */ + program_drive_counts (index); + set_prefetch_mode (index, 0); + printk("cmd640: drive%d timings/prefetch cleared\n", index); + } else { + /* + * Record timings/prefetch without changing them. + * This preserves any prior BIOS setup. + */ + retrieve_drive_counts (index); + check_prefetch (index); + printk("cmd640: drive%d timings/prefetch(%s) preserved", + index, drive->no_io_32bit ? "off" : "on"); + display_clocks(index); + } +#else + /* + * Set the drive unmask flags to match the prefetch setting + */ + check_prefetch (index); + printk("cmd640: drive%d timings/prefetch(%s) preserved\n", + index, drive->no_io_32bit ? "off" : "on"); +#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ + } + +#ifdef CMD640_DUMP_REGS + CMD640_DUMP_REGS; +#endif + return 1; +} + diff --git a/linux/src/drivers/block/floppy.c b/linux/src/drivers/block/floppy.c new file mode 100644 index 00000000..0314a0b7 --- /dev/null +++ b/linux/src/drivers/block/floppy.c @@ -0,0 +1,4284 @@ +/* + * linux/kernel/floppy.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright (C) 1993, 1994 Alain Knaff + */ +/* + * 02.12.91 - Changed to static variables to indicate need for reset + * and recalibrate. This makes some things easier (output_byte reset + * checking etc), and means less interrupt jumping in case of errors, + * so the code is hopefully easier to understand. + */ + +/* + * This file is certainly a mess. I've tried my best to get it working, + * but I don't like programming floppies, and I have only one anyway. + * Urgel. I should check for more errors, and do more graceful error + * recovery. Seems there are problems with several drives. I've tried to + * correct them. No promises. + */ + +/* + * As with hd.c, all routines within this file can (and will) be called + * by interrupts, so extreme caution is needed. A hardware interrupt + * handler may not sleep, or a kernel panic will happen. Thus I cannot + * call "floppy-on" directly, but have to set a special timer interrupt + * etc. + */ + +/* + * 28.02.92 - made track-buffering routines, based on the routines written + * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. + */ + +/* + * Automatic floppy-detection and formatting written by Werner Almesberger + * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with + * the floppy-change signal detection. + */ + +/* + * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed + * FDC data overrun bug, added some preliminary stuff for vertical + * recording support. + * + * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. + * + * TODO: Errors are still not counted properly. + */ + +/* 1992/9/20 + * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) + * modeled after the freeware MS-DOS program fdformat/88 V1.8 by + * Christoph H. Hochst\"atter. + * I have fixed the shift values to the ones I always use. Maybe a new + * ioctl() should be created to be able to modify them. + * There is a bug in the driver that makes it impossible to format a + * floppy as the first thing after bootup. + */ + +/* + * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and + * this helped the floppy driver as well. Much cleaner, and still seems to + * work. + */ + +/* 1994/6/24 --bbroad-- added the floppy table entries and made + * minor modifications to allow 2.88 floppies to be run. + */ + +/* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more + * disk types. + */ + +/* + * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger + * format bug fixes, but unfortunately some new bugs too... + */ + +/* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write + * errors to allow safe writing by specialized programs. + */ + +/* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks + * by defining bit 1 of the "stretch" parameter to mean put sectors on the + * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's + * drives are "upside-down"). + */ + +/* + * 1995/8/26 -- Andreas Busse -- added Mips support. + */ + +/* + * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent + * features to asm/floppy.h. + */ + + +#define FLOPPY_SANITY_CHECK +#undef FLOPPY_SILENT_DCL_CLEAR + +#define REALLY_SLOW_IO + +#define DEBUGT 2 +#define DCL_DEBUG /* debug disk change line */ + +/* do print messages for unexpected interrupts */ +static int print_unex=1; +#include <linux/utsname.h> +#include <linux/module.h> + +/* the following is the mask of allowed drives. By default units 2 and + * 3 of both floppy controllers are disabled, because switching on the + * motor of these drives causes system hangs on some PCI computers. drive + * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if + * a drive is allowed. */ +static int FLOPPY_IRQ=6; +static int FLOPPY_DMA=2; +static int allowed_drive_mask = 0x33; + +static int irqdma_allocated = 0; + +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/kernel.h> +#include <linux/timer.h> +#include <linux/tqueue.h> +#define FDPATCHES +#include <linux/fdreg.h> + + +#include <linux/fd.h> + + +#define OLDFDRAWCMD 0x020d /* send a raw command to the FDC */ + +struct old_floppy_raw_cmd { + void *data; + long length; + + unsigned char rate; + unsigned char flags; + unsigned char cmd_count; + unsigned char cmd[9]; + unsigned char reply_count; + unsigned char reply[7]; + int track; +}; + +#include <linux/errno.h> +#include <linux/malloc.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/fcntl.h> +#include <linux/delay.h> +#include <linux/mc146818rtc.h> /* CMOS defines */ +#include <linux/ioport.h> +#include <linux/interrupt.h> + +#include <asm/dma.h> +#include <asm/irq.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/segment.h> + +static int use_virtual_dma=0; /* virtual DMA for Intel */ +static unsigned short virtual_dma_port=0x3f0; +void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs); +static int set_dor(int fdc, char mask, char data); +static inline int __get_order(unsigned long size); +#include <asm/floppy.h> + + +#define MAJOR_NR FLOPPY_MAJOR + +#include <linux/blk.h> +#include <linux/cdrom.h> /* for the compatibility eject ioctl */ + + +#ifndef FLOPPY_MOTOR_MASK +#define FLOPPY_MOTOR_MASK 0xf0 +#endif + +#ifndef fd_get_dma_residue +#define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) +#endif + +/* Dma Memory related stuff */ + +/* Pure 2^n version of get_order */ +static inline int __get_order(unsigned long size) +{ + int order; + + size = (size-1) >> (PAGE_SHIFT-1); + order = -1; + do { + size >>= 1; + order++; + } while (size); + return order; +} + +#ifndef fd_dma_mem_free +#define fd_dma_mem_free(addr, size) free_pages(addr, __get_order(size)) +#endif + +#ifndef fd_dma_mem_alloc +#define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,__get_order(size)) +#endif + +/* End dma memory related stuff */ + +static unsigned int fake_change = 0; +static int initialising=1; + +static inline int TYPE(kdev_t x) { + return (MINOR(x)>>2) & 0x1f; +} +static inline int DRIVE(kdev_t x) { + return (MINOR(x)&0x03) | ((MINOR(x)&0x80) >> 5); +} +#define ITYPE(x) (((x)>>2) & 0x1f) +#define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) +#define UNIT(x) ((x) & 0x03) /* drive on fdc */ +#define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ +#define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) + /* reverse mapping from unit and fdc to drive */ +#define DP (&drive_params[current_drive]) +#define DRS (&drive_state[current_drive]) +#define DRWE (&write_errors[current_drive]) +#define FDCS (&fdc_state[fdc]) +#define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags)) +#define SETF(x) (set_bit(x##_BIT, &DRS->flags)) +#define TESTF(x) (test_bit(x##_BIT, &DRS->flags)) + +#define UDP (&drive_params[drive]) +#define UDRS (&drive_state[drive]) +#define UDRWE (&write_errors[drive]) +#define UFDCS (&fdc_state[FDC(drive)]) +#define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags)) +#define USETF(x) (set_bit(x##_BIT, &UDRS->flags)) +#define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags)) + +#define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args) + +#define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) +#define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) + +#define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) + +#define INT_OFF save_flags(flags); cli() +#define INT_ON restore_flags(flags) + +/* read/write */ +#define COMMAND raw_cmd->cmd[0] +#define DR_SELECT raw_cmd->cmd[1] +#define TRACK raw_cmd->cmd[2] +#define HEAD raw_cmd->cmd[3] +#define SECTOR raw_cmd->cmd[4] +#define SIZECODE raw_cmd->cmd[5] +#define SECT_PER_TRACK raw_cmd->cmd[6] +#define GAP raw_cmd->cmd[7] +#define SIZECODE2 raw_cmd->cmd[8] +#define NR_RW 9 + +/* format */ +#define F_SIZECODE raw_cmd->cmd[2] +#define F_SECT_PER_TRACK raw_cmd->cmd[3] +#define F_GAP raw_cmd->cmd[4] +#define F_FILL raw_cmd->cmd[5] +#define NR_F 6 + +/* + * Maximum disk size (in kilobytes). This default is used whenever the + * current disk size is unknown. + * [Now it is rather a minimum] + */ +#define MAX_DISK_SIZE 4 /* 3984*/ + +#define K_64 0x10000 /* 64KB */ + +/* + * globals used by 'result()' + */ +#define MAX_REPLIES 16 +static unsigned char reply_buffer[MAX_REPLIES]; +static int inr; /* size of reply buffer, when called from interrupt */ +#define ST0 (reply_buffer[0]) +#define ST1 (reply_buffer[1]) +#define ST2 (reply_buffer[2]) +#define ST3 (reply_buffer[0]) /* result of GETSTATUS */ +#define R_TRACK (reply_buffer[3]) +#define R_HEAD (reply_buffer[4]) +#define R_SECTOR (reply_buffer[5]) +#define R_SIZECODE (reply_buffer[6]) + +#define SEL_DLY (2*HZ/100) + +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) +/* + * this struct defines the different floppy drive types. + */ +static struct { + struct floppy_drive_params params; + const char *name; /* name printed while booting */ +} default_drive_params[]= { +/* NOTE: the time values in jiffies should be in msec! + CMOS drive type + | Maximum data rate supported by drive type + | | Head load time, msec + | | | Head unload time, msec (not used) + | | | | Step rate interval, usec + | | | | | Time needed for spinup time (jiffies) + | | | | | | Timeout for spinning down (jiffies) + | | | | | | | Spindown offset (where disk stops) + | | | | | | | | Select delay + | | | | | | | | | RPS + | | | | | | | | | | Max number of tracks + | | | | | | | | | | | Interrupt timeout + | | | | | | | | | | | | Max nonintlv. sectors + | | | | | | | | | | | | | -Max Errors- flags */ +{{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, + 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, + +{{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, + 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ + +{{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, + 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ + +{{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, + 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ + +{{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, + 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ + +{{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, + 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ + +{{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, + 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ +/* | --autodetected formats--- | | | + * read_track | | Name printed when booting + * | Native format + * Frequency of disk change checks */ +}; + +static struct floppy_drive_params drive_params[N_DRIVE]; +static struct floppy_drive_struct drive_state[N_DRIVE]; +static struct floppy_write_errors write_errors[N_DRIVE]; +static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; + +/* + * This struct defines the different floppy types. + * + * Bit 0 of 'stretch' tells if the tracks need to be doubled for some + * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' + * tells if the disk is in Commodore 1581 format, which means side 0 sectors + * are located on side 1 of the disk but with a side 0 ID, and vice-versa. + * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the + * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical + * side 0 is on physical side 0 (but with the misnamed sector IDs). + * 'stretch' should probably be renamed to something more general, like + * 'options'. Other parameters should be self-explanatory (see also + * setfdprm(8)). + */ +static struct floppy_struct floppy_type[32] = { + { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ + { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ + { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ + { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ + { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ + { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ + { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ + { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ + { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ + { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120"}, /* 9 3.12MB 3.5" */ + + { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ + { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ + { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ + { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ + { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ + { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ + { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ + { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ + { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ + { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ + + { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ + { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ + { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ + { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ + { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ + { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ + { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ + { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ + { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ + + { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ + { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ + { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ +}; + +#define NUMBER(x) (sizeof(x) / sizeof(*(x))) +#define SECTSIZE (_FD_SECTSIZE(*floppy)) + +/* Auto-detection: Disk type used until the next media change occurs. */ +static struct floppy_struct *current_type[N_DRIVE] = { + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL +}; + +/* + * User-provided type information. current_type points to + * the respective entry of this array. + */ +static struct floppy_struct user_params[N_DRIVE]; + +static int floppy_sizes[256]; +static int floppy_blocksizes[256] = { 0, }; + +/* + * The driver is trying to determine the correct media format + * while probing is set. rw_interrupt() clears it after a + * successful access. + */ +static int probing = 0; + +/* Synchronization of FDC access. */ +#define FD_COMMAND_NONE -1 +#define FD_COMMAND_ERROR 2 +#define FD_COMMAND_OKAY 3 + +static volatile int command_status = FD_COMMAND_NONE, fdc_busy = 0; +static struct wait_queue *fdc_wait = NULL, *command_done = NULL; +#define NO_SIGNAL (!(current->signal & ~current->blocked) || !interruptible) +#define CALL(x) if ((x) == -EINTR) return -EINTR +#define ECALL(x) if ((ret = (x))) return ret; +#define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) +#define WAIT(x) _WAIT((x),interruptible) +#define IWAIT(x) _WAIT((x),1) + +/* Errors during formatting are counted here. */ +static int format_errors; + +/* Format request descriptor. */ +static struct format_descr format_req; + +/* + * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps + * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), + * H is head unload time (1=16ms, 2=32ms, etc) + */ + +/* + * Track buffer + * Because these are written to by the DMA controller, they must + * not contain a 64k byte boundary crossing, or data will be + * corrupted/lost. + */ +static char *floppy_track_buffer=0; +static int max_buffer_sectors=0; + +static int *errors; +typedef void (*done_f)(int); +static struct cont_t { + void (*interrupt)(void); /* this is called after the interrupt of the + * main command */ + void (*redo)(void); /* this is called to retry the operation */ + void (*error)(void); /* this is called to tally an error */ + done_f done; /* this is called to say if the operation has + * succeeded/failed */ +} *cont=NULL; + +static void floppy_ready(void); +static void floppy_start(void); +static void process_fd_request(void); +static void recalibrate_floppy(void); +static void floppy_shutdown(void); + +static int floppy_grab_irq_and_dma(void); +static void floppy_release_irq_and_dma(void); + +/* + * The "reset" variable should be tested whenever an interrupt is scheduled, + * after the commands have been sent. This is to ensure that the driver doesn't + * get wedged when the interrupt doesn't come because of a failed command. + * reset doesn't need to be tested before sending commands, because + * output_byte is automatically disabled when reset is set. + */ +#define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } +static void reset_fdc(void); + +/* + * These are global variables, as that's the easiest way to give + * information to interrupts. They are the data used for the current + * request. + */ +#define NO_TRACK -1 +#define NEED_1_RECAL -2 +#define NEED_2_RECAL -3 + +/* */ +static int usage_count = 0; + + +/* buffer related variables */ +static int buffer_track = -1; +static int buffer_drive = -1; +static int buffer_min = -1; +static int buffer_max = -1; + +/* fdc related variables, should end up in a struct */ +static struct floppy_fdc_state fdc_state[N_FDC]; +static int fdc; /* current fdc */ + +static struct floppy_struct *_floppy = floppy_type; +static unsigned char current_drive = 0; +static long current_count_sectors = 0; +static unsigned char sector_t; /* sector in track */ + +#ifndef fd_eject +#define fd_eject(x) -EINVAL +#endif + + +#ifdef DEBUGT +static long unsigned debugtimer; +#endif + +/* + * Debugging + * ========= + */ +static inline void set_debugt(void) +{ +#ifdef DEBUGT + debugtimer = jiffies; +#endif +} + +static inline void debugt(const char *message) +{ +#ifdef DEBUGT + if (DP->flags & DEBUGT) + printk("%s dtime=%lu\n", message, jiffies-debugtimer); +#endif +} + +typedef void (*timeout_fn)(unsigned long); +static struct timer_list fd_timeout ={ NULL, NULL, 0, 0, + (timeout_fn) floppy_shutdown }; + +static const char *timeout_message; + +#ifdef FLOPPY_SANITY_CHECK +static void is_alive(const char *message) +{ + /* this routine checks whether the floppy driver is "alive" */ + if (fdc_busy && command_status < 2 && !fd_timeout.prev){ + DPRINT("timeout handler died: %s\n",message); + } +} +#endif + +#ifdef FLOPPY_SANITY_CHECK + +#define OLOGSIZE 20 + +static void (*lasthandler)(void) = NULL; +static int interruptjiffies=0; +static int resultjiffies=0; +static int resultsize=0; +static int lastredo=0; + +static struct output_log { + unsigned char data; + unsigned char status; + unsigned long jiffies; +} output_log[OLOGSIZE]; + +static int output_log_pos=0; +#endif + +#define CURRENTD -1 +#define MAXTIMEOUT -2 + +static void reschedule_timeout(int drive, const char *message, int marg) +{ + if (drive == CURRENTD) + drive = current_drive; + del_timer(&fd_timeout); + if (drive < 0 || drive > N_DRIVE) { + fd_timeout.expires = jiffies + 20*HZ; + drive=0; + } else + fd_timeout.expires = jiffies + UDP->timeout; + add_timer(&fd_timeout); + if (UDP->flags & FD_DEBUG){ + DPRINT("reschedule timeout "); + printk(message, marg); + printk("\n"); + } + timeout_message = message; +} + +static int maximum(int a, int b) +{ + if(a > b) + return a; + else + return b; +} +#define INFBOUND(a,b) (a)=maximum((a),(b)); + +static int minimum(int a, int b) +{ + if(a < b) + return a; + else + return b; +} +#define SUPBOUND(a,b) (a)=minimum((a),(b)); + + +/* + * Bottom half floppy driver. + * ========================== + * + * This part of the file contains the code talking directly to the hardware, + * and also the main service loop (seek-configure-spinup-command) + */ + +/* + * disk change. + * This routine is responsible for maintaining the FD_DISK_CHANGE flag, + * and the last_checked date. + * + * last_checked is the date of the last check which showed 'no disk change' + * FD_DISK_CHANGE is set under two conditions: + * 1. The floppy has been changed after some i/o to that floppy already + * took place. + * 2. No floppy disk is in the drive. This is done in order to ensure that + * requests are quickly flushed in case there is no disk in the drive. It + * follows that FD_DISK_CHANGE can only be cleared if there is a disk in + * the drive. + * + * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. + * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on + * each seek. If a disk is present, the disk change line should also be + * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk + * change line is set, this means either that no disk is in the drive, or + * that it has been removed since the last seek. + * + * This means that we really have a third possibility too: + * The floppy has been changed after the last seek. + */ + +static int disk_change(int drive) +{ + int fdc=FDC(drive); +#ifdef FLOPPY_SANITY_CHECK + if (jiffies - UDRS->select_date < UDP->select_delay) + DPRINT("WARNING disk change called early\n"); + if (!(FDCS->dor & (0x10 << UNIT(drive))) || + (FDCS->dor & 3) != UNIT(drive) || + fdc != FDC(drive)){ + DPRINT("probing disk change on unselected drive\n"); + DPRINT("drive=%d fdc=%d dor=%x\n",drive, FDC(drive), + FDCS->dor); + } +#endif + +#ifdef DCL_DEBUG + if (UDP->flags & FD_DEBUG){ + DPRINT("checking disk change line for drive %d\n",drive); + DPRINT("jiffies=%ld\n", jiffies); + DPRINT("disk change line=%x\n",fd_inb(FD_DIR)&0x80); + DPRINT("flags=%x\n",UDRS->flags); + } +#endif + if (UDP->flags & FD_BROKEN_DCL) + return UTESTF(FD_DISK_CHANGED); + if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80){ + USETF(FD_VERIFY); /* verify write protection */ + if (UDRS->maxblock){ + /* mark it changed */ + USETF(FD_DISK_CHANGED); + } + + /* invalidate its geometry */ + if (UDRS->keep_data >= 0) { + if ((UDP->flags & FTD_MSG) && + current_type[drive] != NULL) + DPRINT("Disk type is undefined after " + "disk change\n"); + current_type[drive] = NULL; + floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE; + } + + /*USETF(FD_DISK_NEWCHANGE);*/ + return 1; + } else { + UDRS->last_checked=jiffies; + UCLEARF(FD_DISK_NEWCHANGE); + } + return 0; +} + +static inline int is_selected(int dor, int unit) +{ + return ((dor & (0x10 << unit)) && (dor &3) == unit); +} + +static int set_dor(int fdc, char mask, char data) +{ + register unsigned char drive, unit, newdor,olddor; + + if (FDCS->address == -1) + return -1; + + olddor = FDCS->dor; + newdor = (olddor & mask) | data; + if (newdor != olddor){ + unit = olddor & 0x3; + if (is_selected(olddor, unit) && !is_selected(newdor,unit)){ + drive = REVDRIVE(fdc,unit); +#ifdef DCL_DEBUG + if (UDP->flags & FD_DEBUG){ + DPRINT("calling disk change from set_dor\n"); + } +#endif + disk_change(drive); + } + FDCS->dor = newdor; + fd_outb(newdor, FD_DOR); + + unit = newdor & 0x3; + if (!is_selected(olddor, unit) && is_selected(newdor,unit)){ + drive = REVDRIVE(fdc,unit); + UDRS->select_date = jiffies; + } + } + + /* FIXME: we should be more graceful here */ + + if (newdor & FLOPPY_MOTOR_MASK) + floppy_grab_irq_and_dma(); + if (olddor & FLOPPY_MOTOR_MASK) + floppy_release_irq_and_dma(); + return olddor; +} + +static void twaddle(void) +{ + if (DP->select_delay) + return; + fd_outb(FDCS->dor & ~(0x10<<UNIT(current_drive)),FD_DOR); + fd_outb(FDCS->dor, FD_DOR); + DRS->select_date = jiffies; +} + +/* reset all driver information about the current fdc. This is needed after + * a reset, and after a raw command. */ +static void reset_fdc_info(int mode) +{ + int drive; + + FDCS->spec1 = FDCS->spec2 = -1; + FDCS->need_configure = 1; + FDCS->perp_mode = 1; + FDCS->rawcmd = 0; + for (drive = 0; drive < N_DRIVE; drive++) + if (FDC(drive) == fdc && + (mode || UDRS->track != NEED_1_RECAL)) + UDRS->track = NEED_2_RECAL; +} + +/* selects the fdc and drive, and enables the fdc's input/dma. */ +static void set_fdc(int drive) +{ + if (drive >= 0 && drive < N_DRIVE){ + fdc = FDC(drive); + current_drive = drive; + } + if (fdc != 1 && fdc != 0) { + printk("bad fdc value\n"); + return; + } + set_dor(fdc,~0,8); +#if N_FDC > 1 + set_dor(1-fdc, ~8, 0); +#endif + if (FDCS->rawcmd == 2) + reset_fdc_info(1); + if (fd_inb(FD_STATUS) != STATUS_READY) + FDCS->reset = 1; +} + +/* locks the driver */ +static int lock_fdc(int drive, int interruptible) +{ + unsigned long flags; + + if (!usage_count){ + printk(KERN_ERR "trying to lock fdc while usage count=0\n"); + return -1; + } + if(floppy_grab_irq_and_dma()==-1) + return -EBUSY; + INT_OFF; + while (fdc_busy && NO_SIGNAL) + interruptible_sleep_on(&fdc_wait); + if (fdc_busy){ + INT_ON; + return -EINTR; + } + fdc_busy = 1; + INT_ON; + command_status = FD_COMMAND_NONE; + reschedule_timeout(drive, "lock fdc", 0); + set_fdc(drive); + return 0; +} + +#define LOCK_FDC(drive,interruptible) \ +if (lock_fdc(drive,interruptible)) return -EINTR; + + +/* unlocks the driver */ +static inline void unlock_fdc(void) +{ + raw_cmd = 0; + if (!fdc_busy) + DPRINT("FDC access conflict!\n"); + + if (DEVICE_INTR) + DPRINT("device interrupt still active at FDC release: %p!\n", + DEVICE_INTR); + command_status = FD_COMMAND_NONE; + del_timer(&fd_timeout); + cont = NULL; + fdc_busy = 0; + floppy_release_irq_and_dma(); + wake_up(&fdc_wait); +} + +/* switches the motor off after a given timeout */ +static void motor_off_callback(unsigned long nr) +{ + unsigned char mask = ~(0x10 << UNIT(nr)); + + set_dor(FDC(nr), mask, 0); +} + +static struct timer_list motor_off_timer[N_DRIVE] = { + { NULL, NULL, 0, 0, motor_off_callback }, + { NULL, NULL, 0, 1, motor_off_callback }, + { NULL, NULL, 0, 2, motor_off_callback }, + { NULL, NULL, 0, 3, motor_off_callback }, + { NULL, NULL, 0, 4, motor_off_callback }, + { NULL, NULL, 0, 5, motor_off_callback }, + { NULL, NULL, 0, 6, motor_off_callback }, + { NULL, NULL, 0, 7, motor_off_callback } +}; + +/* schedules motor off */ +static void floppy_off(unsigned int drive) +{ + unsigned long volatile delta; + register int fdc=FDC(drive); + + if (!(FDCS->dor & (0x10 << UNIT(drive)))) + return; + + del_timer(motor_off_timer+drive); + + /* make spindle stop in a position which minimizes spinup time + * next time */ + if (UDP->rps){ + delta = jiffies - UDRS->first_read_date + HZ - + UDP->spindown_offset; + delta = ((delta * UDP->rps) % HZ) / UDP->rps; + motor_off_timer[drive].expires = jiffies + UDP->spindown - delta; + } + add_timer(motor_off_timer+drive); +} + +/* + * cycle through all N_DRIVE floppy drives, for disk change testing. + * stopping at current drive. This is done before any long operation, to + * be sure to have up to date disk change information. + */ +static void scandrives(void) +{ + int i, drive, saved_drive; + + if (DP->select_delay) + return; + + saved_drive = current_drive; + for (i=0; i < N_DRIVE; i++){ + drive = (saved_drive + i + 1) % N_DRIVE; + if (UDRS->fd_ref == 0 || UDP->select_delay != 0) + continue; /* skip closed drives */ + set_fdc(drive); + if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & + (0x10 << UNIT(drive)))) + /* switch the motor off again, if it was off to + * begin with */ + set_dor(fdc, ~(0x10 << UNIT(drive)), 0); + } + set_fdc(saved_drive); +} + +static void empty(void) +{ +} + +static struct tq_struct floppy_tq = +{ 0, 0, 0, 0 }; + +static struct timer_list fd_timer ={ NULL, NULL, 0, 0, 0 }; + +static void cancel_activity(void) +{ + CLEAR_INTR; + floppy_tq.routine = (void *)(void *) empty; + del_timer(&fd_timer); +} + +/* this function makes sure that the disk stays in the drive during the + * transfer */ +static void fd_watchdog(void) +{ +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("calling disk change from watchdog\n"); + } +#endif + + if (disk_change(current_drive)){ + DPRINT("disk removed during i/o\n"); + cancel_activity(); + cont->done(0); + reset_fdc(); + } else { + del_timer(&fd_timer); + fd_timer.function = (timeout_fn) fd_watchdog; + fd_timer.expires = jiffies + HZ / 10; + add_timer(&fd_timer); + } +} + +static void main_command_interrupt(void) +{ + del_timer(&fd_timer); + cont->interrupt(); +} + +/* waits for a delay (spinup or select) to pass */ +static int wait_for_completion(int delay, timeout_fn function) +{ + if (FDCS->reset){ + reset_fdc(); /* do the reset during sleep to win time + * if we don't need to sleep, it's a good + * occasion anyways */ + return 1; + } + + if ((signed) (jiffies - delay) < 0){ + del_timer(&fd_timer); + fd_timer.function = function; + fd_timer.expires = delay; + add_timer(&fd_timer); + return 1; + } + return 0; +} + +static int hlt_disabled=0; +static void floppy_disable_hlt(void) +{ + unsigned long flags; + + INT_OFF; + if (!hlt_disabled){ + hlt_disabled=1; +#ifdef HAVE_DISABLE_HLT + disable_hlt(); +#endif + } + INT_ON; +} + +static void floppy_enable_hlt(void) +{ + unsigned long flags; + + INT_OFF; + if (hlt_disabled){ + hlt_disabled=0; +#ifdef HAVE_DISABLE_HLT + enable_hlt(); +#endif + } + INT_ON; +} + + +static void setup_DMA(void) +{ + unsigned long flags; + +#ifdef FLOPPY_SANITY_CHECK + if (raw_cmd->length == 0){ + int i; + + printk("zero dma transfer size:"); + for (i=0; i < raw_cmd->cmd_count; i++) + printk("%x,", raw_cmd->cmd[i]); + printk("\n"); + cont->done(0); + FDCS->reset = 1; + return; + } + if ((long) raw_cmd->kernel_data % 512){ + printk("non aligned address: %p\n", raw_cmd->kernel_data); + cont->done(0); + FDCS->reset=1; + return; + } + if (CROSS_64KB(raw_cmd->kernel_data, raw_cmd->length)) { + printk("DMA crossing 64-K boundary %p-%p\n", + raw_cmd->kernel_data, + raw_cmd->kernel_data + raw_cmd->length); + cont->done(0); + FDCS->reset=1; + return; + } +#endif + INT_OFF; + fd_disable_dma(); + fd_clear_dma_ff(); + fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); + fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)? + DMA_MODE_READ : DMA_MODE_WRITE); + fd_set_dma_addr(virt_to_bus(raw_cmd->kernel_data)); + fd_set_dma_count(raw_cmd->length); + virtual_dma_port = FDCS->address; + fd_enable_dma(); + INT_ON; + floppy_disable_hlt(); +} + +void show_floppy(void); + +/* waits until the fdc becomes ready */ +static int wait_til_ready(void) +{ + int counter, status; + if(FDCS->reset) + return -1; + for (counter = 0; counter < 10000; counter++) { + status = fd_inb(FD_STATUS); + if (status & STATUS_READY) + return status; + } + if (!initialising) { + DPRINT("Getstatus times out (%x) on fdc %d\n", + status, fdc); + show_floppy(); + } + FDCS->reset = 1; + return -1; +} + +/* sends a command byte to the fdc */ +static int output_byte(char byte) +{ + int status; + + if ((status = wait_til_ready()) < 0) + return -1; + if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY){ + fd_outb(byte,FD_DATA); +#ifdef FLOPPY_SANITY_CHECK + output_log[output_log_pos].data = byte; + output_log[output_log_pos].status = status; + output_log[output_log_pos].jiffies = jiffies; + output_log_pos = (output_log_pos + 1) % OLOGSIZE; +#endif + return 0; + } + FDCS->reset = 1; + if (!initialising) { + DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", + byte, fdc, status); + show_floppy(); + } + return -1; +} +#define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;} + +/* gets the response from the fdc */ +static int result(void) +{ + int i, status; + + for(i=0; i < MAX_REPLIES; i++) { + if ((status = wait_til_ready()) < 0) + break; + status &= STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA; + if ((status & ~STATUS_BUSY) == STATUS_READY){ +#ifdef FLOPPY_SANITY_CHECK + resultjiffies = jiffies; + resultsize = i; +#endif + return i; + } + if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY)) + reply_buffer[i] = fd_inb(FD_DATA); + else + break; + } + if(!initialising) { + DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", + fdc, status, i); + show_floppy(); + } + FDCS->reset = 1; + return -1; +} + +#define MORE_OUTPUT -2 +/* does the fdc need more output? */ +static int need_more_output(void) +{ + int status; + if( (status = wait_til_ready()) < 0) + return -1; + if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY) + return MORE_OUTPUT; + return result(); +} + +/* Set perpendicular mode as required, based on data rate, if supported. + * 82077 Now tested. 1Mbps data rate only possible with 82077-1. + */ +static inline void perpendicular_mode(void) +{ + unsigned char perp_mode; + + if (raw_cmd->rate & 0x40){ + switch(raw_cmd->rate & 3){ + case 0: + perp_mode=2; + break; + case 3: + perp_mode=3; + break; + default: + DPRINT("Invalid data rate for perpendicular mode!\n"); + cont->done(0); + FDCS->reset = 1; /* convenient way to return to + * redo without to much hassle (deep + * stack et al. */ + return; + } + } else + perp_mode = 0; + + if (FDCS->perp_mode == perp_mode) + return; + if (FDCS->version >= FDC_82077_ORIG) { + output_byte(FD_PERPENDICULAR); + output_byte(perp_mode); + FDCS->perp_mode = perp_mode; + } else if (perp_mode) { + DPRINT("perpendicular mode not supported by this FDC.\n"); + } +} /* perpendicular_mode */ + +static int fifo_depth = 0xa; +static int no_fifo = 0; + +static int fdc_configure(void) +{ + /* Turn on FIFO */ + output_byte(FD_CONFIGURE); + if(need_more_output() != MORE_OUTPUT) + return 0; + output_byte(0); + output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); + output_byte(0); /* pre-compensation from track + 0 upwards */ + return 1; +} + +#define NOMINAL_DTR 500 + +/* Issue a "SPECIFY" command to set the step rate time, head unload time, + * head load time, and DMA disable flag to values needed by floppy. + * + * The value "dtr" is the data transfer rate in Kbps. It is needed + * to account for the data rate-based scaling done by the 82072 and 82077 + * FDC types. This parameter is ignored for other types of FDCs (i.e. + * 8272a). + * + * Note that changing the data transfer rate has a (probably deleterious) + * effect on the parameters subject to scaling for 82072/82077 FDCs, so + * fdc_specify is called again after each data transfer rate + * change. + * + * srt: 1000 to 16000 in microseconds + * hut: 16 to 240 milliseconds + * hlt: 2 to 254 milliseconds + * + * These values are rounded up to the next highest available delay time. + */ +static void fdc_specify(void) +{ + unsigned char spec1, spec2; + int srt, hlt, hut; + unsigned long dtr = NOMINAL_DTR; + unsigned long scale_dtr = NOMINAL_DTR; + int hlt_max_code = 0x7f; + int hut_max_code = 0xf; + + if (FDCS->need_configure && FDCS->version >= FDC_82072A) { + fdc_configure(); + FDCS->need_configure = 0; + /*DPRINT("FIFO enabled\n");*/ + } + + switch (raw_cmd->rate & 0x03) { + case 3: + dtr = 1000; + break; + case 1: + dtr = 300; + if (FDCS->version >= FDC_82078) { + /* chose the default rate table, not the one + * where 1 = 2 Mbps */ + output_byte(FD_DRIVESPEC); + if(need_more_output() == MORE_OUTPUT) { + output_byte(UNIT(current_drive)); + output_byte(0xc0); + } + } + break; + case 2: + dtr = 250; + break; + } + + if (FDCS->version >= FDC_82072) { + scale_dtr = dtr; + hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ + hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ + } + + /* Convert step rate from microseconds to milliseconds and 4 bits */ + srt = 16 - (DP->srt*scale_dtr/1000 + NOMINAL_DTR - 1)/NOMINAL_DTR; + SUPBOUND(srt, 0xf); + INFBOUND(srt, 0); + + hlt = (DP->hlt*scale_dtr/2 + NOMINAL_DTR - 1)/NOMINAL_DTR; + if (hlt < 0x01) + hlt = 0x01; + else if (hlt > 0x7f) + hlt = hlt_max_code; + + hut = (DP->hut*scale_dtr/16 + NOMINAL_DTR - 1)/NOMINAL_DTR; + if (hut < 0x1) + hut = 0x1; + else if (hut > 0xf) + hut = hut_max_code; + + spec1 = (srt << 4) | hut; + spec2 = (hlt << 1) | (use_virtual_dma & 1); + + /* If these parameters did not change, just return with success */ + if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { + /* Go ahead and set spec1 and spec2 */ + output_byte(FD_SPECIFY); + output_byte(FDCS->spec1 = spec1); + output_byte(FDCS->spec2 = spec2); + } +} /* fdc_specify */ + +/* Set the FDC's data transfer rate on behalf of the specified drive. + * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue + * of the specify command (i.e. using the fdc_specify function). + */ +static int fdc_dtr(void) +{ + /* If data rate not already set to desired value, set it. */ + if ((raw_cmd->rate & 3) == FDCS->dtr) + return 0; + + /* Set dtr */ + fd_outb(raw_cmd->rate & 3, FD_DCR); + + /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) + * need a stabilization period of several milliseconds to be + * enforced after data rate changes before R/W operations. + * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) + */ + FDCS->dtr = raw_cmd->rate & 3; + return(wait_for_completion(jiffies+2*HZ/100, + (timeout_fn) floppy_ready)); +} /* fdc_dtr */ + +static void tell_sector(void) +{ + printk(": track %d, head %d, sector %d, size %d", + R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); +} /* tell_sector */ + + +/* + * OK, this error interpreting routine is called after a + * DMA read/write has succeeded + * or failed, so we check the results, and copy any buffers. + * hhb: Added better error reporting. + * ak: Made this into a separate routine. + */ +static int interpret_errors(void) +{ + char bad; + + if (inr!=7) { + DPRINT("-- FDC reply error"); + FDCS->reset = 1; + return 1; + } + + /* check IC to find cause of interrupt */ + switch (ST0 & ST0_INTR) { + case 0x40: /* error occurred during command execution */ + if (ST1 & ST1_EOC) + return 0; /* occurs with pseudo-DMA */ + bad = 1; + if (ST1 & ST1_WP) { + DPRINT("Drive is write protected\n"); + CLEARF(FD_DISK_WRITABLE); + cont->done(0); + bad = 2; + } else if (ST1 & ST1_ND) { + SETF(FD_NEED_TWADDLE); + } else if (ST1 & ST1_OR) { + if (DP->flags & FTD_MSG) + DPRINT("Over/Underrun - retrying\n"); + bad = 0; + }else if (*errors >= DP->max_errors.reporting){ + DPRINT(""); + if (ST0 & ST0_ECE) { + printk("Recalibrate failed!"); + } else if (ST2 & ST2_CRC) { + printk("data CRC error"); + tell_sector(); + } else if (ST1 & ST1_CRC) { + printk("CRC error"); + tell_sector(); + } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) { + if (!probing) { + printk("sector not found"); + tell_sector(); + } else + printk("probe failed..."); + } else if (ST2 & ST2_WC) { /* seek error */ + printk("wrong cylinder"); + } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ + printk("bad cylinder"); + } else { + printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2); + tell_sector(); + } + printk("\n"); + + } + if (ST2 & ST2_WC || ST2 & ST2_BC) + /* wrong cylinder => recal */ + DRS->track = NEED_2_RECAL; + return bad; + case 0x80: /* invalid command given */ + DPRINT("Invalid FDC command given!\n"); + cont->done(0); + return 2; + case 0xc0: + DPRINT("Abnormal termination caused by polling\n"); + cont->error(); + return 2; + default: /* (0) Normal command termination */ + return 0; + } +} + +/* + * This routine is called when everything should be correctly set up + * for the transfer (i.e. floppy motor is on, the correct floppy is + * selected, and the head is sitting on the right track). + */ +static void setup_rw_floppy(void) +{ + int i,ready_date,r, flags,dflags; + timeout_fn function; + + flags = raw_cmd->flags; + if (flags & (FD_RAW_READ | FD_RAW_WRITE)) + flags |= FD_RAW_INTR; + + if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){ + ready_date = DRS->spinup_date + DP->spinup; + /* If spinup will take a long time, rerun scandrives + * again just before spinup completion. Beware that + * after scandrives, we must again wait for selection. + */ + if ((signed) (ready_date - jiffies) > DP->select_delay){ + ready_date -= DP->select_delay; + function = (timeout_fn) floppy_start; + } else + function = (timeout_fn) setup_rw_floppy; + + /* wait until the floppy is spinning fast enough */ + if (wait_for_completion(ready_date,function)) + return; + } + dflags = DRS->flags; + + if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) + setup_DMA(); + + if (flags & FD_RAW_INTR) + SET_INTR(main_command_interrupt); + + r=0; + for (i=0; i< raw_cmd->cmd_count; i++) + r|=output_byte(raw_cmd->cmd[i]); + +#ifdef DEBUGT + debugt("rw_command: "); +#endif + if (r){ + cont->error(); + reset_fdc(); + return; + } + + if (!(flags & FD_RAW_INTR)){ + inr = result(); + cont->interrupt(); + } else if (flags & FD_RAW_NEED_DISK) + fd_watchdog(); +} + +static int blind_seek; + +/* + * This is the routine called after every seek (or recalibrate) interrupt + * from the floppy controller. + */ +static void seek_interrupt(void) +{ +#ifdef DEBUGT + debugt("seek interrupt:"); +#endif + if (inr != 2 || (ST0 & 0xF8) != 0x20) { + DPRINT("seek failed\n"); + DRS->track = NEED_2_RECAL; + cont->error(); + cont->redo(); + return; + } + if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){ +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("clearing NEWCHANGE flag because of effective seek\n"); + DPRINT("jiffies=%ld\n", jiffies); + } +#endif + CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ + DRS->select_date = jiffies; + } + DRS->track = ST1; + floppy_ready(); +} + +static void check_wp(void) +{ + if (TESTF(FD_VERIFY)) { + /* check write protection */ + output_byte(FD_GETSTATUS); + output_byte(UNIT(current_drive)); + if (result() != 1){ + FDCS->reset = 1; + return; + } + CLEARF(FD_VERIFY); + CLEARF(FD_NEED_TWADDLE); +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("checking whether disk is write protected\n"); + DPRINT("wp=%x\n",ST3 & 0x40); + } +#endif + if (!(ST3 & 0x40)) + SETF(FD_DISK_WRITABLE); + else + CLEARF(FD_DISK_WRITABLE); + } +} + +static void seek_floppy(void) +{ + int track; + + blind_seek=0; + +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("calling disk change from seek\n"); + } +#endif + + if (!TESTF(FD_DISK_NEWCHANGE) && + disk_change(current_drive) && + (raw_cmd->flags & FD_RAW_NEED_DISK)){ + /* the media changed flag should be cleared after the seek. + * If it isn't, this means that there is really no disk in + * the drive. + */ + SETF(FD_DISK_CHANGED); + cont->done(0); + cont->redo(); + return; + } + if (DRS->track <= NEED_1_RECAL){ + recalibrate_floppy(); + return; + } else if (TESTF(FD_DISK_NEWCHANGE) && + (raw_cmd->flags & FD_RAW_NEED_DISK) && + (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { + /* we seek to clear the media-changed condition. Does anybody + * know a more elegant way, which works on all drives? */ + if (raw_cmd->track) + track = raw_cmd->track - 1; + else { + if (DP->flags & FD_SILENT_DCL_CLEAR){ + set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); + blind_seek = 1; + raw_cmd->flags |= FD_RAW_NEED_SEEK; + } + track = 1; + } + } else { + check_wp(); + if (raw_cmd->track != DRS->track && + (raw_cmd->flags & FD_RAW_NEED_SEEK)) + track = raw_cmd->track; + else { + setup_rw_floppy(); + return; + } + } + + SET_INTR(seek_interrupt); + output_byte(FD_SEEK); + output_byte(UNIT(current_drive)); + LAST_OUT(track); +#ifdef DEBUGT + debugt("seek command:"); +#endif +} + +static void recal_interrupt(void) +{ +#ifdef DEBUGT + debugt("recal interrupt:"); +#endif + if (inr !=2) + FDCS->reset = 1; + else if (ST0 & ST0_ECE) { + switch(DRS->track){ + case NEED_1_RECAL: +#ifdef DEBUGT + debugt("recal interrupt need 1 recal:"); +#endif + /* after a second recalibrate, we still haven't + * reached track 0. Probably no drive. Raise an + * error, as failing immediately might upset + * computers possessed by the Devil :-) */ + cont->error(); + cont->redo(); + return; + case NEED_2_RECAL: +#ifdef DEBUGT + debugt("recal interrupt need 2 recal:"); +#endif + /* If we already did a recalibrate, + * and we are not at track 0, this + * means we have moved. (The only way + * not to move at recalibration is to + * be already at track 0.) Clear the + * new change flag */ +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("clearing NEWCHANGE flag because of second recalibrate\n"); + } +#endif + + CLEARF(FD_DISK_NEWCHANGE); + DRS->select_date = jiffies; + /* fall through */ + default: +#ifdef DEBUGT + debugt("recal interrupt default:"); +#endif + /* Recalibrate moves the head by at + * most 80 steps. If after one + * recalibrate we don't have reached + * track 0, this might mean that we + * started beyond track 80. Try + * again. */ + DRS->track = NEED_1_RECAL; + break; + } + } else + DRS->track = ST1; + floppy_ready(); +} + +static void print_result(char *message, int inr) +{ + int i; + + DPRINT("%s ", message); + if (inr >= 0) + for (i=0; i<inr; i++) + printk("repl[%d]=%x ", i, reply_buffer[i]); + printk("\n"); +} + +/* interrupt handler */ +void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs) +{ + void (*handler)(void) = DEVICE_INTR; + int do_print; + + lasthandler = handler; + interruptjiffies = jiffies; + + fd_disable_dma(); + floppy_enable_hlt(); + CLEAR_INTR; + if (fdc >= N_FDC || FDCS->address == -1){ + /* we don't even know which FDC is the culprit */ + printk("DOR0=%x\n", fdc_state[0].dor); + printk("floppy interrupt on bizarre fdc %d\n",fdc); + printk("handler=%p\n", handler); + is_alive("bizarre fdc"); + return; + } + + FDCS->reset = 0; + /* We have to clear the reset flag here, because apparently on boxes + * with level triggered interrupts (PS/2, Sparc, ...), it is needed to + * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the + * emission of the SENSEI's. + * It is OK to emit floppy commands because we are in an interrupt + * handler here, and thus we have to fear no interference of other + * activity. + */ + + do_print = !handler && print_unex && !initialising; + + inr = result(); + if(do_print) + print_result("unexpected interrupt", inr); + if (inr == 0){ + int max_sensei = 4; + do { + output_byte(FD_SENSEI); + inr = result(); + if(do_print) + print_result("sensei", inr); + max_sensei--; + } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2 && max_sensei); + } + if (handler) { + if(intr_count >= 2) { + /* expected interrupt */ + floppy_tq.routine = (void *)(void *) handler; + queue_task_irq(&floppy_tq, &tq_immediate); + mark_bh(IMMEDIATE_BH); + } else + handler(); + } else + FDCS->reset = 1; + is_alive("normal interrupt end"); +} + +static void recalibrate_floppy(void) +{ +#ifdef DEBUGT + debugt("recalibrate floppy:"); +#endif + SET_INTR(recal_interrupt); + output_byte(FD_RECALIBRATE); + LAST_OUT(UNIT(current_drive)); +} + +/* + * Must do 4 FD_SENSEIs after reset because of ``drive polling''. + */ +static void reset_interrupt(void) +{ +#ifdef DEBUGT + debugt("reset interrupt:"); +#endif + result(); /* get the status ready for set_fdc */ + if (FDCS->reset) { + printk("reset set in interrupt, calling %p\n", cont->error); + cont->error(); /* a reset just after a reset. BAD! */ + } + cont->redo(); +} + +/* + * reset is done by pulling bit 2 of DOR low for a while (old FDCs), + * or by setting the self clearing bit 7 of STATUS (newer FDCs) + */ +static void reset_fdc(void) +{ + SET_INTR(reset_interrupt); + FDCS->reset = 0; + reset_fdc_info(0); + + /* Pseudo-DMA may intercept 'reset finished' interrupt. */ + /* Irrelevant for systems with true DMA (i386). */ + fd_disable_dma(); + + if (FDCS->version >= FDC_82072A) + fd_outb(0x80 | (FDCS->dtr &3), FD_STATUS); + else { + fd_outb(FDCS->dor & ~0x04, FD_DOR); + udelay(FD_RESET_DELAY); + fd_outb(FDCS->dor, FD_DOR); + } +} + +void show_floppy(void) +{ + int i; + + printk("\n"); + printk("floppy driver state\n"); + printk("-------------------\n"); + printk("now=%ld last interrupt=%d last called handler=%p\n", + jiffies, interruptjiffies, lasthandler); + + +#ifdef FLOPPY_SANITY_CHECK + printk("timeout_message=%s\n", timeout_message); + printk("last output bytes:\n"); + for (i=0; i < OLOGSIZE; i++) + printk("%2x %2x %ld\n", + output_log[(i+output_log_pos) % OLOGSIZE].data, + output_log[(i+output_log_pos) % OLOGSIZE].status, + output_log[(i+output_log_pos) % OLOGSIZE].jiffies); + printk("last result at %d\n", resultjiffies); + printk("last redo_fd_request at %d\n", lastredo); + for (i=0; i<resultsize; i++){ + printk("%2x ", reply_buffer[i]); + } + printk("\n"); +#endif + + printk("status=%x\n", fd_inb(FD_STATUS)); + printk("fdc_busy=%d\n", fdc_busy); + if (DEVICE_INTR) + printk("DEVICE_INTR=%p\n", DEVICE_INTR); + if (floppy_tq.sync) + printk("floppy_tq.routine=%p\n", floppy_tq.routine); + if (fd_timer.prev) + printk("fd_timer.function=%p\n", fd_timer.function); + if (fd_timeout.prev){ + printk("timer_table=%p\n",fd_timeout.function); + printk("expires=%ld\n",fd_timeout.expires-jiffies); + printk("now=%ld\n",jiffies); + } + printk("cont=%p\n", cont); + printk("CURRENT=%p\n", CURRENT); + printk("command_status=%d\n", command_status); + printk("\n"); +} + +static void floppy_shutdown(void) +{ + if (!initialising) + show_floppy(); + cancel_activity(); + sti(); + + floppy_enable_hlt(); + fd_disable_dma(); + /* avoid dma going to a random drive after shutdown */ + + if (!initialising) + DPRINT("floppy timeout called\n"); + FDCS->reset = 1; + if (cont){ + cont->done(0); + cont->redo(); /* this will recall reset when needed */ + } else { + printk("no cont in shutdown!\n"); + process_fd_request(); + } + is_alive("floppy shutdown"); +} +/*typedef void (*timeout_fn)(unsigned long);*/ + +/* start motor, check media-changed condition and write protection */ +static int start_motor(void (*function)(void) ) +{ + int mask, data; + + mask = 0xfc; + data = UNIT(current_drive); + if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)){ + if (!(FDCS->dor & (0x10 << UNIT(current_drive)))){ + set_debugt(); + /* no read since this drive is running */ + DRS->first_read_date = 0; + /* note motor start time if motor is not yet running */ + DRS->spinup_date = jiffies; + data |= (0x10 << UNIT(current_drive)); + } + } else + if (FDCS->dor & (0x10 << UNIT(current_drive))) + mask &= ~(0x10 << UNIT(current_drive)); + + /* starts motor and selects floppy */ + del_timer(motor_off_timer + current_drive); + set_dor(fdc, mask, data); + + /* wait_for_completion also schedules reset if needed. */ + return(wait_for_completion(DRS->select_date+DP->select_delay, + (timeout_fn) function)); +} + +static void floppy_ready(void) +{ + CHECK_RESET; + if (start_motor(floppy_ready)) return; + if (fdc_dtr()) return; + +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("calling disk change from floppy_ready\n"); + } +#endif + + if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && + disk_change(current_drive) && + !DP->select_delay) + twaddle(); /* this clears the dcl on certain drive/controller + * combinations */ + + if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){ + perpendicular_mode(); + fdc_specify(); /* must be done here because of hut, hlt ... */ + seek_floppy(); + } else + setup_rw_floppy(); +} + +static void floppy_start(void) +{ + reschedule_timeout(CURRENTD, "floppy start", 0); + + scandrives(); +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("setting NEWCHANGE in floppy_start\n"); + } +#endif + SETF(FD_DISK_NEWCHANGE); + floppy_ready(); +} + +/* + * ======================================================================== + * here ends the bottom half. Exported routines are: + * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, + * start_motor, reset_fdc, reset_fdc_info, interpret_errors. + * Initialization also uses output_byte, result, set_dor, floppy_interrupt + * and set_dor. + * ======================================================================== + */ +/* + * General purpose continuations. + * ============================== + */ + +static void do_wakeup(void) +{ + reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); + cont = 0; + command_status += 2; + wake_up(&command_done); +} + +static struct cont_t wakeup_cont={ + empty, + do_wakeup, + empty, + (done_f)empty +}; + + +static struct cont_t intr_cont={ + empty, + process_fd_request, + empty, + (done_f) empty +}; + +static int wait_til_done(void (*handler)(void), int interruptible) +{ + int ret; + unsigned long flags; + + floppy_tq.routine = (void *)(void *) handler; + queue_task(&floppy_tq, &tq_immediate); + mark_bh(IMMEDIATE_BH); + INT_OFF; + while(command_status < 2 && NO_SIGNAL){ + is_alive("wait_til_done"); + if (interruptible) + interruptible_sleep_on(&command_done); + else + sleep_on(&command_done); + } + if (command_status < 2){ + cancel_activity(); + cont = &intr_cont; + reset_fdc(); + INT_ON; + return -EINTR; + } + INT_ON; + + if (FDCS->reset) + command_status = FD_COMMAND_ERROR; + if (command_status == FD_COMMAND_OKAY) + ret=0; + else + ret=-EIO; + command_status = FD_COMMAND_NONE; + return ret; +} + +static void generic_done(int result) +{ + command_status = result; + cont = &wakeup_cont; +} + +static void generic_success(void) +{ + cont->done(1); +} + +static void generic_failure(void) +{ + cont->done(0); +} + +static void success_and_wakeup(void) +{ + generic_success(); + cont->redo(); +} + + +/* + * formatting and rw support. + * ========================== + */ + +static int next_valid_format(void) +{ + int probed_format; + + probed_format = DRS->probed_format; + while(1){ + if (probed_format >= 8 || + !DP->autodetect[probed_format]){ + DRS->probed_format = 0; + return 1; + } + if (floppy_type[DP->autodetect[probed_format]].sect){ + DRS->probed_format = probed_format; + return 0; + } + probed_format++; + } +} + +static void bad_flp_intr(void) +{ + if (probing){ + DRS->probed_format++; + if (!next_valid_format()) + return; + } + (*errors)++; + INFBOUND(DRWE->badness, *errors); + if (*errors > DP->max_errors.abort) + cont->done(0); + if (*errors > DP->max_errors.reset) + FDCS->reset = 1; + else if (*errors > DP->max_errors.recal) + DRS->track = NEED_2_RECAL; +} + +static void set_floppy(kdev_t device) +{ + if (TYPE(device)) + _floppy = TYPE(device) + floppy_type; + else + _floppy = current_type[ DRIVE(device) ]; +} + +/* + * formatting support. + * =================== + */ +static void format_interrupt(void) +{ + switch (interpret_errors()){ + case 1: + cont->error(); + case 2: + break; + case 0: + cont->done(1); + } + cont->redo(); +} + +#define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) +#define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) +#define CT(x) ((x) | 0x40) +static void setup_format_params(int track) +{ + struct fparm { + unsigned char track,head,sect,size; + } *here = (struct fparm *)floppy_track_buffer; + int il,n; + int count,head_shift,track_shift; + + raw_cmd = &default_raw_cmd; + raw_cmd->track = track; + + raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | + FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; + raw_cmd->rate = _floppy->rate & 0x43; + raw_cmd->cmd_count = NR_F; + COMMAND = FM_MODE(_floppy,FD_FORMAT); + DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,format_req.head); + F_SIZECODE = FD_SIZECODE(_floppy); + F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; + F_GAP = _floppy->fmt_gap; + F_FILL = FD_FILL_BYTE; + + raw_cmd->kernel_data = floppy_track_buffer; + raw_cmd->length = 4 * F_SECT_PER_TRACK; + + /* allow for about 30ms for data transport per track */ + head_shift = (F_SECT_PER_TRACK + 5) / 6; + + /* a ``cylinder'' is two tracks plus a little stepping time */ + track_shift = 2 * head_shift + 3; + + /* position of logical sector 1 on this track */ + n = (track_shift * format_req.track + head_shift * format_req.head) + % F_SECT_PER_TRACK; + + /* determine interleave */ + il = 1; + if (_floppy->fmt_gap < 0x22) + il++; + + /* initialize field */ + for (count = 0; count < F_SECT_PER_TRACK; ++count) { + here[count].track = format_req.track; + here[count].head = format_req.head; + here[count].sect = 0; + here[count].size = F_SIZECODE; + } + /* place logical sectors */ + for (count = 1; count <= F_SECT_PER_TRACK; ++count) { + here[n].sect = count; + n = (n+il) % F_SECT_PER_TRACK; + if (here[n].sect) { /* sector busy, find next free sector */ + ++n; + if (n>= F_SECT_PER_TRACK) { + n-=F_SECT_PER_TRACK; + while (here[n].sect) ++n; + } + } + } +} + +static void redo_format(void) +{ + buffer_track = -1; + setup_format_params(format_req.track << STRETCH(_floppy)); + floppy_start(); +#ifdef DEBUGT + debugt("queue format request"); +#endif +} + +static struct cont_t format_cont={ + format_interrupt, + redo_format, + bad_flp_intr, + generic_done }; + +static int do_format(kdev_t device, struct format_descr *tmp_format_req) +{ + int ret; + int drive=DRIVE(device); + + LOCK_FDC(drive,1); + set_floppy(device); + if (!_floppy || + _floppy->track > DP->tracks || + tmp_format_req->track >= _floppy->track || + tmp_format_req->head >= _floppy->head || + (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || + !_floppy->fmt_gap) { + process_fd_request(); + return -EINVAL; + } + format_req = *tmp_format_req; + format_errors = 0; + cont = &format_cont; + errors = &format_errors; + IWAIT(redo_format); + process_fd_request(); + return ret; +} + +/* + * Buffer read/write and support + * ============================= + */ + +/* new request_done. Can handle physical sectors which are smaller than a + * logical buffer */ +static void request_done(int uptodate) +{ + int block; + + probing = 0; + reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); + + if (!CURRENT){ + DPRINT("request list destroyed in floppy request done\n"); + return; + } + + if (uptodate){ + /* maintain values for invalidation on geometry + * change */ + block = current_count_sectors + CURRENT->sector; + INFBOUND(DRS->maxblock, block); + if (block > _floppy->sect) + DRS->maxtrack = 1; + + /* unlock chained buffers */ + while (current_count_sectors && CURRENT && + current_count_sectors >= CURRENT->current_nr_sectors){ + current_count_sectors -= CURRENT->current_nr_sectors; + CURRENT->nr_sectors -= CURRENT->current_nr_sectors; + CURRENT->sector += CURRENT->current_nr_sectors; + end_request(1); + } + if (current_count_sectors && CURRENT){ + /* "unlock" last subsector */ + CURRENT->buffer += current_count_sectors <<9; + CURRENT->current_nr_sectors -= current_count_sectors; + CURRENT->nr_sectors -= current_count_sectors; + CURRENT->sector += current_count_sectors; + return; + } + + if (current_count_sectors && !CURRENT) + DPRINT("request list destroyed in floppy request done\n"); + + } else { + if (CURRENT->cmd == WRITE) { + /* record write error information */ + DRWE->write_errors++; + if (DRWE->write_errors == 1) { + DRWE->first_error_sector = CURRENT->sector; + DRWE->first_error_generation = DRS->generation; + } + DRWE->last_error_sector = CURRENT->sector; + DRWE->last_error_generation = DRS->generation; + } + end_request(0); + } +} + +/* Interrupt handler evaluating the result of the r/w operation */ +static void rw_interrupt(void) +{ + int nr_sectors, ssize, eoc; + + if (!DRS->first_read_date) + DRS->first_read_date = jiffies; + + nr_sectors = 0; + CODE2SIZE; + + if(ST1 & ST1_EOC) + eoc = 1; + else + eoc = 0; + nr_sectors = ((R_TRACK-TRACK)*_floppy->head+R_HEAD-HEAD) * + _floppy->sect + ((R_SECTOR-SECTOR+eoc) << SIZECODE >> 2) - + (sector_t % _floppy->sect) % ssize; + +#ifdef FLOPPY_SANITY_CHECK + if (nr_sectors > current_count_sectors + ssize - + (current_count_sectors + sector_t) % ssize + + sector_t % ssize){ + DPRINT("long rw: %x instead of %lx\n", + nr_sectors, current_count_sectors); + printk("rs=%d s=%d\n", R_SECTOR, SECTOR); + printk("rh=%d h=%d\n", R_HEAD, HEAD); + printk("rt=%d t=%d\n", R_TRACK, TRACK); + printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, + sector_t, ssize); + } +#endif + INFBOUND(nr_sectors,0); + SUPBOUND(current_count_sectors, nr_sectors); + + switch (interpret_errors()){ + case 2: + cont->redo(); + return; + case 1: + if (!current_count_sectors){ + cont->error(); + cont->redo(); + return; + } + break; + case 0: + if (!current_count_sectors){ + cont->redo(); + return; + } + current_type[current_drive] = _floppy; + floppy_sizes[TOMINOR(current_drive) ]= _floppy->size>>1; + break; + } + + if (probing) { + if (DP->flags & FTD_MSG) + DPRINT("Auto-detected floppy type %s in fd%d\n", + _floppy->name,current_drive); + current_type[current_drive] = _floppy; + floppy_sizes[TOMINOR(current_drive)] = _floppy->size >> 1; + probing = 0; + } + + if (CT(COMMAND) != FD_READ || + raw_cmd->kernel_data == CURRENT->buffer){ + /* transfer directly from buffer */ + cont->done(1); + } else if (CT(COMMAND) == FD_READ){ + buffer_track = raw_cmd->track; + buffer_drive = current_drive; + INFBOUND(buffer_max, nr_sectors + sector_t); + } + cont->redo(); +} + +/* Compute maximal contiguous buffer size. */ +static int buffer_chain_size(void) +{ + struct buffer_head *bh; + int size; + char *base; + + base = CURRENT->buffer; + size = CURRENT->current_nr_sectors << 9; + bh = CURRENT->bh; + + if (bh){ + bh = bh->b_reqnext; + while (bh && bh->b_data == base + size){ + size += bh->b_size; + bh = bh->b_reqnext; + } + } + return size >> 9; +} + +/* Compute the maximal transfer size */ +static int transfer_size(int ssize, int max_sector, int max_size) +{ + SUPBOUND(max_sector, sector_t + max_size); + + /* alignment */ + max_sector -= (max_sector % _floppy->sect) % ssize; + + /* transfer size, beginning not aligned */ + current_count_sectors = max_sector - sector_t ; + + return max_sector; +} + +/* + * Move data from/to the track buffer to/from the buffer cache. + */ +static void copy_buffer(int ssize, int max_sector, int max_sector_2) +{ + int remaining; /* number of transferred 512-byte sectors */ + struct buffer_head *bh; + char *buffer, *dma_buffer; + int size; + + max_sector = transfer_size(ssize, + minimum(max_sector, max_sector_2), + CURRENT->nr_sectors); + + if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && + buffer_max > sector_t + CURRENT->nr_sectors) + current_count_sectors = minimum(buffer_max - sector_t, + CURRENT->nr_sectors); + + remaining = current_count_sectors << 9; +#ifdef FLOPPY_SANITY_CHECK + if ((remaining >> 9) > CURRENT->nr_sectors && + CT(COMMAND) == FD_WRITE){ + DPRINT("in copy buffer\n"); + printk("current_count_sectors=%ld\n", current_count_sectors); + printk("remaining=%d\n", remaining >> 9); + printk("CURRENT->nr_sectors=%ld\n",CURRENT->nr_sectors); + printk("CURRENT->current_nr_sectors=%ld\n", + CURRENT->current_nr_sectors); + printk("max_sector=%d\n", max_sector); + printk("ssize=%d\n", ssize); + } +#endif + + buffer_max = maximum(max_sector, buffer_max); + + dma_buffer = floppy_track_buffer + ((sector_t - buffer_min) << 9); + + bh = CURRENT->bh; + size = CURRENT->current_nr_sectors << 9; + buffer = CURRENT->buffer; + + while (remaining > 0){ + SUPBOUND(size, remaining); +#ifdef FLOPPY_SANITY_CHECK + if (dma_buffer + size > + floppy_track_buffer + (max_buffer_sectors << 10) || + dma_buffer < floppy_track_buffer){ + DPRINT("buffer overrun in copy buffer %d\n", + (int) ((floppy_track_buffer - dma_buffer) >>9)); + printk("sector_t=%d buffer_min=%d\n", + sector_t, buffer_min); + printk("current_count_sectors=%ld\n", + current_count_sectors); + if (CT(COMMAND) == FD_READ) + printk("read\n"); + if (CT(COMMAND) == FD_READ) + printk("write\n"); + break; + } + if (((unsigned long)buffer) % 512) + DPRINT("%p buffer not aligned\n", buffer); +#endif + if (CT(COMMAND) == FD_READ) + memcpy(buffer, dma_buffer, size); + else + memcpy(dma_buffer, buffer, size); + remaining -= size; + if (!remaining) + break; + + dma_buffer += size; + bh = bh->b_reqnext; +#ifdef FLOPPY_SANITY_CHECK + if (!bh){ + DPRINT("bh=null in copy buffer after copy\n"); + break; + } +#endif + size = bh->b_size; + buffer = bh->b_data; + } +#ifdef FLOPPY_SANITY_CHECK + if (remaining){ + if (remaining > 0) + max_sector -= remaining >> 9; + DPRINT("weirdness: remaining %d\n", remaining>>9); + } +#endif +} + +/* + * Formulate a read/write request. + * this routine decides where to load the data (directly to buffer, or to + * tmp floppy area), how much data to load (the size of the buffer, the whole + * track, or a single sector) + * All floppy_track_buffer handling goes in here. If we ever add track buffer + * allocation on the fly, it should be done here. No other part should need + * modification. + */ + +static int make_raw_rw_request(void) +{ + int aligned_sector_t; + int max_sector, max_size, tracksize, ssize; + + set_fdc(DRIVE(CURRENT->rq_dev)); + + raw_cmd = &default_raw_cmd; + raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | + FD_RAW_NEED_SEEK; + raw_cmd->cmd_count = NR_RW; + if (CURRENT->cmd == READ){ + raw_cmd->flags |= FD_RAW_READ; + COMMAND = FM_MODE(_floppy,FD_READ); + } else if (CURRENT->cmd == WRITE){ + raw_cmd->flags |= FD_RAW_WRITE; + COMMAND = FM_MODE(_floppy,FD_WRITE); + } else { + DPRINT("make_raw_rw_request: unknown command\n"); + return 0; + } + + max_sector = _floppy->sect * _floppy->head; + + TRACK = CURRENT->sector / max_sector; + sector_t = CURRENT->sector % max_sector; + if (_floppy->track && TRACK >= _floppy->track) + return 0; + HEAD = sector_t / _floppy->sect; + + if (((_floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) && + sector_t < _floppy->sect) + max_sector = _floppy->sect; + + /* 2M disks have phantom sectors on the first track */ + if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){ + max_sector = 2 * _floppy->sect / 3; + if (sector_t >= max_sector){ + current_count_sectors = minimum(_floppy->sect - sector_t, + CURRENT->nr_sectors); + return 1; + } + SIZECODE = 2; + } else + SIZECODE = FD_SIZECODE(_floppy); + raw_cmd->rate = _floppy->rate & 0x43; + if ((_floppy->rate & FD_2M) && + (TRACK || HEAD) && + raw_cmd->rate == 2) + raw_cmd->rate = 1; + + if (SIZECODE) + SIZECODE2 = 0xff; + else + SIZECODE2 = 0x80; + raw_cmd->track = TRACK << STRETCH(_floppy); + DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,HEAD); + GAP = _floppy->gap; + CODE2SIZE; + SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; + SECTOR = ((sector_t % _floppy->sect) << 2 >> SIZECODE) + 1; + tracksize = _floppy->sect - _floppy->sect % ssize; + if (tracksize < _floppy->sect){ + SECT_PER_TRACK ++; + if (tracksize <= sector_t % _floppy->sect) + SECTOR--; + while (tracksize <= sector_t % _floppy->sect){ + while(tracksize + ssize > _floppy->sect){ + SIZECODE--; + ssize >>= 1; + } + SECTOR++; SECT_PER_TRACK ++; + tracksize += ssize; + } + max_sector = HEAD * _floppy->sect + tracksize; + } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) + max_sector = _floppy->sect; + + aligned_sector_t = sector_t - (sector_t % _floppy->sect) % ssize; + max_size = CURRENT->nr_sectors; + if ((raw_cmd->track == buffer_track) && + (current_drive == buffer_drive) && + (sector_t >= buffer_min) && (sector_t < buffer_max)) { + /* data already in track buffer */ + if (CT(COMMAND) == FD_READ) { + copy_buffer(1, max_sector, buffer_max); + return 1; + } + } else if (aligned_sector_t != sector_t || CURRENT->nr_sectors < ssize){ + if (CT(COMMAND) == FD_WRITE){ + if (sector_t + CURRENT->nr_sectors > ssize && + sector_t + CURRENT->nr_sectors < ssize + ssize) + max_size = ssize + ssize; + else + max_size = ssize; + } + raw_cmd->flags &= ~FD_RAW_WRITE; + raw_cmd->flags |= FD_RAW_READ; + COMMAND = FM_MODE(_floppy,FD_READ); + } else if ((unsigned long)CURRENT->buffer < MAX_DMA_ADDRESS) { + unsigned long dma_limit; + int direct, indirect; + + indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) - + sector_t; + + /* + * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide + * on a 64 bit machine! + */ + max_size = buffer_chain_size(); + dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) CURRENT->buffer)) >> 9; + if ((unsigned long) max_size > dma_limit) { + max_size = dma_limit; + } + /* 64 kb boundaries */ + if (CROSS_64KB(CURRENT->buffer, max_size << 9)) + max_size = (K_64 - ((long) CURRENT->buffer) % K_64)>>9; + direct = transfer_size(ssize,max_sector,max_size) - sector_t; + /* + * We try to read tracks, but if we get too many errors, we + * go back to reading just one sector at a time. + * + * This means we should be able to read a sector even if there + * are other bad sectors on this track. + */ + if (!direct || + (indirect * 2 > direct * 3 && + *errors < DP->max_errors.read_track && + /*!TESTF(FD_NEED_TWADDLE) &&*/ + ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){ + max_size = CURRENT->nr_sectors; + } else { + raw_cmd->kernel_data = CURRENT->buffer; + raw_cmd->length = current_count_sectors << 9; + if (raw_cmd->length == 0){ + DPRINT("zero dma transfer attempted from make_raw_request\n"); + DPRINT("indirect=%d direct=%d sector_t=%d", + indirect, direct, sector_t); + return 0; + } + return 2; + } + } + + if (CT(COMMAND) == FD_READ) + max_size = max_sector; /* unbounded */ + + /* claim buffer track if needed */ + if (buffer_track != raw_cmd->track || /* bad track */ + buffer_drive !=current_drive || /* bad drive */ + sector_t > buffer_max || + sector_t < buffer_min || + ((CT(COMMAND) == FD_READ || + (aligned_sector_t == sector_t && CURRENT->nr_sectors >= ssize))&& + max_sector > 2 * max_buffer_sectors + buffer_min && + max_size + sector_t > 2 * max_buffer_sectors + buffer_min) + /* not enough space */){ + buffer_track = -1; + buffer_drive = current_drive; + buffer_max = buffer_min = aligned_sector_t; + } + raw_cmd->kernel_data = floppy_track_buffer + + ((aligned_sector_t-buffer_min)<<9); + + if (CT(COMMAND) == FD_WRITE){ + /* copy write buffer to track buffer. + * if we get here, we know that the write + * is either aligned or the data already in the buffer + * (buffer will be overwritten) */ +#ifdef FLOPPY_SANITY_CHECK + if (sector_t != aligned_sector_t && buffer_track == -1) + DPRINT("internal error offset !=0 on write\n"); +#endif + buffer_track = raw_cmd->track; + buffer_drive = current_drive; + copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min); + } else + transfer_size(ssize, max_sector, + 2*max_buffer_sectors+buffer_min-aligned_sector_t); + + /* round up current_count_sectors to get dma xfer size */ + raw_cmd->length = sector_t+current_count_sectors-aligned_sector_t; + raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1; + raw_cmd->length <<= 9; +#ifdef FLOPPY_SANITY_CHECK + if ((raw_cmd->length < current_count_sectors << 9) || + (raw_cmd->kernel_data != CURRENT->buffer && + CT(COMMAND) == FD_WRITE && + (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || + aligned_sector_t < buffer_min)) || + raw_cmd->length % (128 << SIZECODE) || + raw_cmd->length <= 0 || current_count_sectors <= 0){ + DPRINT("fractionary current count b=%lx s=%lx\n", + raw_cmd->length, current_count_sectors); + if (raw_cmd->kernel_data != CURRENT->buffer) + printk("addr=%d, length=%ld\n", + (int) ((raw_cmd->kernel_data - + floppy_track_buffer) >> 9), + current_count_sectors); + printk("st=%d ast=%d mse=%d msi=%d\n", + sector_t, aligned_sector_t, max_sector, max_size); + printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); + printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", + COMMAND, SECTOR, HEAD, TRACK); + printk("buffer drive=%d\n", buffer_drive); + printk("buffer track=%d\n", buffer_track); + printk("buffer_min=%d\n", buffer_min); + printk("buffer_max=%d\n", buffer_max); + return 0; + } + + if (raw_cmd->kernel_data != CURRENT->buffer){ + if (raw_cmd->kernel_data < floppy_track_buffer || + current_count_sectors < 0 || + raw_cmd->length < 0 || + raw_cmd->kernel_data + raw_cmd->length > + floppy_track_buffer + (max_buffer_sectors << 10)){ + DPRINT("buffer overrun in schedule dma\n"); + printk("sector_t=%d buffer_min=%d current_count=%ld\n", + sector_t, buffer_min, + raw_cmd->length >> 9); + printk("current_count_sectors=%ld\n", + current_count_sectors); + if (CT(COMMAND) == FD_READ) + printk("read\n"); + if (CT(COMMAND) == FD_READ) + printk("write\n"); + return 0; + } + } else if (raw_cmd->length > CURRENT->nr_sectors << 9 || + current_count_sectors > CURRENT->nr_sectors){ + DPRINT("buffer overrun in direct transfer\n"); + return 0; + } else if (raw_cmd->length < current_count_sectors << 9){ + DPRINT("more sectors than bytes\n"); + printk("bytes=%ld\n", raw_cmd->length >> 9); + printk("sectors=%ld\n", current_count_sectors); + } + if (raw_cmd->length == 0){ + DPRINT("zero dma transfer attempted from make_raw_request\n"); + return 0; + } +#endif + return 2; +} + +static void redo_fd_request(void) +{ +#define REPEAT {request_done(0); continue; } + kdev_t device; + int tmp; + + lastredo = jiffies; + if (current_drive < N_DRIVE) + floppy_off(current_drive); + + if (CURRENT && CURRENT->rq_status == RQ_INACTIVE){ + CLEAR_INTR; + unlock_fdc(); + return; + } + + while(1){ + if (!CURRENT) { + CLEAR_INTR; + unlock_fdc(); + return; + } + if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) + panic(DEVICE_NAME ": request list destroyed"); + if (CURRENT->bh && !buffer_locked(CURRENT->bh)) + panic(DEVICE_NAME ": block not locked"); + + device = CURRENT->rq_dev; + set_fdc(DRIVE(device)); + reschedule_timeout(CURRENTD, "redo fd request", 0); + + set_floppy(device); + raw_cmd = & default_raw_cmd; + raw_cmd->flags = 0; + if (start_motor(redo_fd_request)) return; + disk_change(current_drive); + if (test_bit(current_drive, &fake_change) || + TESTF(FD_DISK_CHANGED)){ + DPRINT("disk absent or changed during operation\n"); + REPEAT; + } + if (!_floppy) { /* Autodetection */ + if (!probing){ + DRS->probed_format = 0; + if (next_valid_format()){ + DPRINT("no autodetectable formats\n"); + _floppy = NULL; + REPEAT; + } + } + probing = 1; + _floppy = floppy_type+DP->autodetect[DRS->probed_format]; + } else + probing = 0; + errors = & (CURRENT->errors); + tmp = make_raw_rw_request(); + if (tmp < 2){ + request_done(tmp); + continue; + } + + if (TESTF(FD_NEED_TWADDLE)) + twaddle(); + floppy_tq.routine = (void *)(void *) floppy_start; + queue_task(&floppy_tq, &tq_immediate); + mark_bh(IMMEDIATE_BH); +#ifdef DEBUGT + debugt("queue fd request"); +#endif + return; + } +#undef REPEAT +} + +static struct cont_t rw_cont={ + rw_interrupt, + redo_fd_request, + bad_flp_intr, + request_done }; + +static struct tq_struct request_tq = +{ 0, 0, (void *) (void *) redo_fd_request, 0 }; + +static void process_fd_request(void) +{ + cont = &rw_cont; + queue_task(&request_tq, &tq_immediate); + mark_bh(IMMEDIATE_BH); +} + +static void do_fd_request(void) +{ + sti(); + if (fdc_busy){ + /* fdc busy, this new request will be treated when the + current one is done */ + is_alive("do fd request, old request running"); + return; + } + lock_fdc(MAXTIMEOUT,0); + process_fd_request(); + is_alive("do fd request"); +} + +static struct cont_t poll_cont={ + success_and_wakeup, + floppy_ready, + generic_failure, + generic_done }; + +static int poll_drive(int interruptible, int flag) +{ + int ret; + /* no auto-sense, just clear dcl */ + raw_cmd = &default_raw_cmd; + raw_cmd->flags= flag; + raw_cmd->track=0; + raw_cmd->cmd_count=0; + cont = &poll_cont; +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("setting NEWCHANGE in poll_drive\n"); + } +#endif + SETF(FD_DISK_NEWCHANGE); + WAIT(floppy_ready); + return ret; +} + +/* + * User triggered reset + * ==================== + */ + +static void reset_intr(void) +{ + printk("weird, reset interrupt called\n"); +} + +static struct cont_t reset_cont={ + reset_intr, + success_and_wakeup, + generic_failure, + generic_done }; + +static int user_reset_fdc(int drive, int arg, int interruptible) +{ + int ret; + + ret=0; + LOCK_FDC(drive,interruptible); + if (arg == FD_RESET_ALWAYS) + FDCS->reset=1; + if (FDCS->reset){ + cont = &reset_cont; + WAIT(reset_fdc); + } + process_fd_request(); + return ret; +} + +/* + * Misc Ioctl's and support + * ======================== + */ +static int fd_copyout(void *param, const void *address, int size) +{ + int ret; + + ECALL(verify_area(VERIFY_WRITE,param,size)); + memcpy_tofs(param,(void *) address, size); + return 0; +} + +static int fd_copyin(void *param, void *address, int size) +{ + int ret; + + ECALL(verify_area(VERIFY_READ,param,size)); + memcpy_fromfs((void *) address, param, size); + return 0; +} + +#define COPYOUT(x) ECALL(fd_copyout((void *)param, &(x), sizeof(x))) +#define COPYIN(x) ECALL(fd_copyin((void *)param, &(x), sizeof(x))) + +static inline const char *drive_name(int type, int drive) +{ + struct floppy_struct *floppy; + + if (type) + floppy = floppy_type + type; + else { + if (UDP->native_format) + floppy = floppy_type + UDP->native_format; + else + return "(null)"; + } + if (floppy->name) + return floppy->name; + else + return "(null)"; +} + + +/* raw commands */ +static void raw_cmd_done(int flag) +{ + int i; + + if (!flag) { + raw_cmd->flags |= FD_RAW_FAILURE; + raw_cmd->flags |= FD_RAW_HARDFAILURE; + } else { + raw_cmd->reply_count = inr; + for (i=0; i< raw_cmd->reply_count; i++) + raw_cmd->reply[i] = reply_buffer[i]; + + if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) + raw_cmd->length = fd_get_dma_residue(); + + if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && + (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) + raw_cmd->flags |= FD_RAW_FAILURE; + + if (disk_change(current_drive)) + raw_cmd->flags |= FD_RAW_DISK_CHANGE; + else + raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; + if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) + motor_off_callback(current_drive); + + if (raw_cmd->next && + (!(raw_cmd->flags & FD_RAW_FAILURE) || + !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && + ((raw_cmd->flags & FD_RAW_FAILURE) || + !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) { + raw_cmd = raw_cmd->next; + return; + } + } + generic_done(flag); +} + + +static struct cont_t raw_cmd_cont={ + success_and_wakeup, + floppy_start, + generic_failure, + raw_cmd_done +}; + +static inline int raw_cmd_copyout(int cmd, char *param, + struct floppy_raw_cmd *ptr) +{ + struct old_floppy_raw_cmd old_raw_cmd; + int ret; + + while(ptr) { + if (cmd == OLDFDRAWCMD) { + old_raw_cmd.flags = ptr->flags; + old_raw_cmd.data = ptr->data; + old_raw_cmd.length = ptr->length; + old_raw_cmd.rate = ptr->rate; + old_raw_cmd.reply_count = ptr->reply_count; + memcpy(old_raw_cmd.reply, ptr->reply, 7); + COPYOUT(old_raw_cmd); + param += sizeof(old_raw_cmd); + } else { + COPYOUT(*ptr); + param += sizeof(struct floppy_raw_cmd); + } + + if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){ + if (ptr->length>=0 && ptr->length<=ptr->buffer_length) + ECALL(fd_copyout(ptr->data, + ptr->kernel_data, + ptr->buffer_length - + ptr->length)); + } + ptr = ptr->next; + } + return 0; +} + + +static void raw_cmd_free(struct floppy_raw_cmd **ptr) +{ + struct floppy_raw_cmd *next,*this; + + this = *ptr; + *ptr = 0; + while(this) { + if (this->buffer_length) { + fd_dma_mem_free((unsigned long)this->kernel_data, + this->buffer_length); + this->buffer_length = 0; + } + next = this->next; + kfree(this); + this = next; + } +} + + +static inline int raw_cmd_copyin(int cmd, char *param, + struct floppy_raw_cmd **rcmd) +{ + struct floppy_raw_cmd *ptr; + struct old_floppy_raw_cmd old_raw_cmd; + int ret; + int i; + + *rcmd = 0; + while(1) { + ptr = (struct floppy_raw_cmd *) + kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); + if (!ptr) + return -ENOMEM; + *rcmd = ptr; + if (cmd == OLDFDRAWCMD){ + COPYIN(old_raw_cmd); + ptr->flags = old_raw_cmd.flags; + ptr->data = old_raw_cmd.data; + ptr->length = old_raw_cmd.length; + ptr->rate = old_raw_cmd.rate; + ptr->cmd_count = old_raw_cmd.cmd_count; + ptr->track = old_raw_cmd.track; + ptr->phys_length = 0; + ptr->next = 0; + ptr->buffer_length = 0; + memcpy(ptr->cmd, old_raw_cmd.cmd, 9); + param += sizeof(struct old_floppy_raw_cmd); + if (ptr->cmd_count > 9) + return -EINVAL; + } else { + COPYIN(*ptr); + ptr->next = 0; + ptr->buffer_length = 0; + param += sizeof(struct floppy_raw_cmd); + if (ptr->cmd_count > 33) + /* the command may now also take up the space + * initially intended for the reply & the + * reply count. Needed for long 82078 commands + * such as RESTORE, which takes ... 17 command + * bytes. Murphy's law #137: When you reserve + * 16 bytes for a structure, you'll one day + * discover that you really need 17... + */ + return -EINVAL; + } + + for (i=0; i< 16; i++) + ptr->reply[i] = 0; + ptr->resultcode = 0; + ptr->kernel_data = 0; + + if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { + if (ptr->length <= 0) + return -EINVAL; + ptr->kernel_data =(char*)fd_dma_mem_alloc(ptr->length); + if (!ptr->kernel_data) + return -ENOMEM; + ptr->buffer_length = ptr->length; + } + if ( ptr->flags & FD_RAW_READ ) + ECALL( verify_area( VERIFY_WRITE, ptr->data, + ptr->length )); + if (ptr->flags & FD_RAW_WRITE) + ECALL(fd_copyin(ptr->data, ptr->kernel_data, + ptr->length)); + rcmd = & (ptr->next); + if (!(ptr->flags & FD_RAW_MORE)) + return 0; + ptr->rate &= 0x43; + } +} + + +static int raw_cmd_ioctl(int cmd, void *param) +{ + int drive, ret, ret2; + struct floppy_raw_cmd *my_raw_cmd; + + if (FDCS->rawcmd <= 1) + FDCS->rawcmd = 1; + for (drive= 0; drive < N_DRIVE; drive++){ + if (FDC(drive) != fdc) + continue; + if (drive == current_drive){ + if (UDRS->fd_ref > 1){ + FDCS->rawcmd = 2; + break; + } + } else if (UDRS->fd_ref){ + FDCS->rawcmd = 2; + break; + } + } + + if (FDCS->reset) + return -EIO; + + ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); + if (ret) { + raw_cmd_free(&my_raw_cmd); + return ret; + } + + raw_cmd = my_raw_cmd; + cont = &raw_cmd_cont; + ret=wait_til_done(floppy_start,1); +#ifdef DCL_DEBUG + if (DP->flags & FD_DEBUG){ + DPRINT("calling disk change from raw_cmd ioctl\n"); + } +#endif + + if (ret != -EINTR && FDCS->reset) + ret = -EIO; + + DRS->track = NO_TRACK; + + ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); + if (!ret) + ret = ret2; + raw_cmd_free(&my_raw_cmd); + return ret; +} + +static int invalidate_drive(kdev_t rdev) +{ + /* invalidate the buffer track to force a reread */ + set_bit(DRIVE(rdev), &fake_change); + process_fd_request(); + check_disk_change(rdev); + return 0; +} + + +static inline void clear_write_error(int drive) +{ + CLEARSTRUCT(UDRWE); +} + +static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, + int drive, int type, kdev_t device) +{ + int cnt; + + /* sanity checking for parameters.*/ + if (g->sect <= 0 || + g->head <= 0 || + g->track <= 0 || + g->track > UDP->tracks>>STRETCH(g) || + /* check if reserved bits are set */ + (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0) + return -EINVAL; + if (type){ + if (!suser()) + return -EPERM; + LOCK_FDC(drive,1); + for (cnt = 0; cnt < N_DRIVE; cnt++){ + if (ITYPE(drive_state[cnt].fd_device) == type && + drive_state[cnt].fd_ref) + set_bit(drive, &fake_change); + } + floppy_type[type] = *g; + floppy_type[type].name="user format"; + for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) + floppy_sizes[cnt]= floppy_sizes[cnt+0x80]= + floppy_type[type].size>>1; + process_fd_request(); + for (cnt = 0; cnt < N_DRIVE; cnt++){ + if (ITYPE(drive_state[cnt].fd_device) == type && + drive_state[cnt].fd_ref) + check_disk_change( + MKDEV(FLOPPY_MAJOR, + drive_state[cnt].fd_device)); + } + } else { + LOCK_FDC(drive,1); + if (cmd != FDDEFPRM) + /* notice a disk change immediately, else + * we loose our settings immediately*/ + CALL(poll_drive(1, FD_RAW_NEED_DISK)); + user_params[drive] = *g; + if (buffer_drive == drive) + SUPBOUND(buffer_max, user_params[drive].sect); + current_type[drive] = &user_params[drive]; + floppy_sizes[drive] = user_params[drive].size >> 1; + if (cmd == FDDEFPRM) + DRS->keep_data = -1; + else + DRS->keep_data = 1; + /* invalidation. Invalidate only when needed, i.e. + * when there are already sectors in the buffer cache + * whose number will change. This is useful, because + * mtools often changes the geometry of the disk after + * looking at the boot block */ + if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack) + invalidate_drive(device); + else + process_fd_request(); + } + return 0; +} + +/* handle obsolete ioctl's */ +static struct translation_entry { + int newcmd; + int oldcmd; + int oldsize; /* size of 0x00xx-style ioctl. Reflects old structures, thus + * use numeric values. NO SIZEOFS */ +} translation_table[]= { + {FDCLRPRM, 0, 0}, + {FDSETPRM, 1, 28}, + {FDDEFPRM, 2, 28}, + {FDGETPRM, 3, 28}, + {FDMSGON, 4, 0}, + {FDMSGOFF, 5, 0}, + {FDFMTBEG, 6, 0}, + {FDFMTTRK, 7, 12}, + {FDFMTEND, 8, 0}, + {FDSETEMSGTRESH, 10, 0}, + {FDFLUSH, 11, 0}, + {FDSETMAXERRS, 12, 20}, + {OLDFDRAWCMD, 30, 0}, + {FDGETMAXERRS, 14, 20}, + {FDGETDRVTYP, 16, 16}, + {FDSETDRVPRM, 20, 88}, + {FDGETDRVPRM, 21, 88}, + {FDGETDRVSTAT, 22, 52}, + {FDPOLLDRVSTAT, 23, 52}, + {FDRESET, 24, 0}, + {FDGETFDCSTAT, 25, 40}, + {FDWERRORCLR, 27, 0}, + {FDWERRORGET, 28, 24}, + {FDRAWCMD, 0, 0}, + {FDEJECT, 0, 0}, + {FDTWADDLE, 40, 0} }; + +static inline int normalize_0x02xx_ioctl(int *cmd, int *size) +{ + int i; + + for (i=0; i < ARRAY_SIZE(translation_table); i++) { + if ((*cmd & 0xffff) == (translation_table[i].newcmd & 0xffff)){ + *size = _IOC_SIZE(*cmd); + *cmd = translation_table[i].newcmd; + if (*size > _IOC_SIZE(*cmd)) { + printk("ioctl not yet supported\n"); + return -EFAULT; + } + return 0; + } + } + return -EINVAL; +} + +static inline int xlate_0x00xx_ioctl(int *cmd, int *size) +{ + int i; + /* old ioctls' for kernels <= 1.3.33 */ + /* When the next even release will come around, we'll start + * warning against these. + * When the next odd release will come around, we'll fail with + * -EINVAL */ + if(strcmp(system_utsname.version, "1.4.0") >= 0) + printk("obsolete floppy ioctl %x\n", *cmd); + if((system_utsname.version[0] == '1' && + strcmp(system_utsname.version, "1.5.0") >= 0) || + (system_utsname.version[0] >= '2' && + strcmp(system_utsname.version, "2.1.0") >= 0)) + return -EINVAL; + for (i=0; i < ARRAY_SIZE(translation_table); i++) { + if (*cmd == translation_table[i].oldcmd) { + *size = translation_table[i].oldsize; + *cmd = translation_table[i].newcmd; + return 0; + } + } + return -EINVAL; +} + +static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, + unsigned long param) +{ +#define IOCTL_MODE_BIT 8 +#define OPEN_WRITE_BIT 16 +#define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT)) +#define OUT(c,x) case c: outparam = (const char *) (x); break +#define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 + + int i,drive,type; + kdev_t device; + int ret; + int size; + union inparam { + struct floppy_struct g; /* geometry */ + struct format_descr f; + struct floppy_max_errors max_errors; + struct floppy_drive_params dp; + } inparam; /* parameters coming from user space */ + const char *outparam; /* parameters passed back to user space */ + + device = inode->i_rdev; + switch (cmd) { + RO_IOCTLS(device,param); + } + type = TYPE(device); + drive = DRIVE(device); + + /* convert compatibility eject ioctls into floppy eject ioctl. + * We do this in order to provide a means to eject floppy disks before + * installing the new fdutils package */ + if(cmd == CDROMEJECT || /* CD-ROM eject */ + cmd == 0x6470 /* SunOS floppy eject */) { + DPRINT("obsolete eject ioctl\n"); + DPRINT("please use floppycontrol --eject\n"); + cmd = FDEJECT; + } + + /* convert the old style command into a new style command */ + if ((cmd & 0xff00) == 0x0200) { + ECALL(normalize_0x02xx_ioctl(&cmd, &size)); + } else if ((cmd & 0xff00) == 0x0000) { + ECALL(xlate_0x00xx_ioctl(&cmd, &size)); + } else + return -EINVAL; + + /* permission checks */ + if (((cmd & 0x80) && !suser()) || + ((cmd & 0x40) && !IOCTL_ALLOWED)) + return -EPERM; + + /* verify writability of result, and fail early */ + if (_IOC_DIR(cmd) & _IOC_READ) + ECALL(verify_area(VERIFY_WRITE,(void *) param, size)); + + /* copyin */ + CLEARSTRUCT(&inparam); + if (_IOC_DIR(cmd) & _IOC_WRITE) + ECALL(fd_copyin((void *)param, &inparam, size)) + + switch (cmd) { + case FDEJECT: + if(UDRS->fd_ref != 1) + /* somebody else has this drive open */ + return -EBUSY; + LOCK_FDC(drive,1); + + /* do the actual eject. Fails on + * non-Sparc architectures */ + ret=fd_eject(UNIT(drive)); + + USETF(FD_DISK_CHANGED); + USETF(FD_VERIFY); + process_fd_request(); + return ret; + case FDCLRPRM: + LOCK_FDC(drive,1); + current_type[drive] = NULL; + floppy_sizes[drive] = MAX_DISK_SIZE; + UDRS->keep_data = 0; + return invalidate_drive(device); + case FDSETPRM: + case FDDEFPRM: + return set_geometry(cmd, & inparam.g, + drive, type, device); + case FDGETPRM: + LOCK_FDC(drive,1); + CALL(poll_drive(1,0)); + process_fd_request(); + if (type) + outparam = (char *) &floppy_type[type]; + else + outparam = (char *) current_type[drive]; + if(!outparam) + return -ENODEV; + break; + + case FDMSGON: + UDP->flags |= FTD_MSG; + return 0; + case FDMSGOFF: + UDP->flags &= ~FTD_MSG; + return 0; + + case FDFMTBEG: + LOCK_FDC(drive,1); + CALL(poll_drive(1, FD_RAW_NEED_DISK)); + ret = UDRS->flags; + process_fd_request(); + if(ret & FD_VERIFY) + return -ENODEV; + if(!(ret & FD_DISK_WRITABLE)) + return -EROFS; + return 0; + case FDFMTTRK: + if (UDRS->fd_ref != 1) + return -EBUSY; + return do_format(device, &inparam.f); + case FDFMTEND: + case FDFLUSH: + LOCK_FDC(drive,1); + return invalidate_drive(device); + + case FDSETEMSGTRESH: + UDP->max_errors.reporting = + (unsigned short) (param & 0x0f); + return 0; + OUT(FDGETMAXERRS, &UDP->max_errors); + IN(FDSETMAXERRS, &UDP->max_errors, max_errors); + + case FDGETDRVTYP: + outparam = drive_name(type,drive); + SUPBOUND(size,strlen(outparam)+1); + break; + + IN(FDSETDRVPRM, UDP, dp); + OUT(FDGETDRVPRM, UDP); + + case FDPOLLDRVSTAT: + LOCK_FDC(drive,1); + CALL(poll_drive(1, FD_RAW_NEED_DISK)); + process_fd_request(); + /* fall through */ + OUT(FDGETDRVSTAT, UDRS); + + case FDRESET: + return user_reset_fdc(drive, (int)param, 1); + + OUT(FDGETFDCSTAT,UFDCS); + + case FDWERRORCLR: + CLEARSTRUCT(UDRWE); + return 0; + OUT(FDWERRORGET,UDRWE); + + case OLDFDRAWCMD: + case FDRAWCMD: + if (type) + return -EINVAL; + LOCK_FDC(drive,1); + set_floppy(device); + CALL(i = raw_cmd_ioctl(cmd,(void *) param)); + process_fd_request(); + return i; + + case FDTWADDLE: + LOCK_FDC(drive,1); + twaddle(); + process_fd_request(); + return 0; + + default: + return -EINVAL; + } + + if (_IOC_DIR(cmd) & _IOC_READ) + return fd_copyout((void *)param, outparam, size); + else + return 0; +#undef IOCTL_ALLOWED +#undef OUT +#undef IN +} + +static void config_types(void) +{ + int first=1; + int drive; + + /* read drive info out of physical CMOS */ + drive=0; + if (!UDP->cmos) + UDP->cmos= FLOPPY0_TYPE; + drive=1; + if (!UDP->cmos && FLOPPY1_TYPE) + UDP->cmos = FLOPPY1_TYPE; + + /* XXX */ + /* additional physical CMOS drive detection should go here */ + + for (drive=0; drive < N_DRIVE; drive++){ + if (UDP->cmos >= 16) + UDP->cmos = 0; + if (UDP->cmos >= 0 && UDP->cmos <= NUMBER(default_drive_params)) + memcpy((char *) UDP, + (char *) (&default_drive_params[(int)UDP->cmos].params), + sizeof(struct floppy_drive_params)); + if (UDP->cmos){ + if (first) + printk(KERN_INFO "Floppy drive(s): "); + else + printk(", "); + first=0; + if (UDP->cmos > 0){ + allowed_drive_mask |= 1 << drive; + printk("fd%d is %s", drive, + default_drive_params[(int)UDP->cmos].name); + } else + printk("fd%d is unknown type %d",drive, + UDP->cmos); + } + } + if (!first) + printk("\n"); +} + +static int floppy_read(struct inode * inode, struct file * filp, + char * buf, int count) +{ + int drive = DRIVE(inode->i_rdev); + + check_disk_change(inode->i_rdev); + if (UTESTF(FD_DISK_CHANGED)) + return -ENXIO; + return block_read(inode, filp, buf, count); +} + +static int floppy_write(struct inode * inode, struct file * filp, + const char * buf, int count) +{ + int block; + int ret; + int drive = DRIVE(inode->i_rdev); + + if (!UDRS->maxblock) + UDRS->maxblock=1;/* make change detectable */ + check_disk_change(inode->i_rdev); + if (UTESTF(FD_DISK_CHANGED)) + return -ENXIO; + if (!UTESTF(FD_DISK_WRITABLE)) + return -EROFS; + block = (filp->f_pos + count) >> 9; + INFBOUND(UDRS->maxblock, block); + ret= block_write(inode, filp, buf, count); + return ret; +} + +static void floppy_release(struct inode * inode, struct file * filp) +{ + int drive; + + drive = DRIVE(inode->i_rdev); + + if (!filp || (filp->f_mode & (2 | OPEN_WRITE_BIT))) + /* if the file is mounted OR (writable now AND writable at + * open time) Linus: Does this cover all cases? */ + block_fsync(inode,filp); + + if (UDRS->fd_ref < 0) + UDRS->fd_ref=0; + else if (!UDRS->fd_ref--) { + DPRINT("floppy_release with fd_ref == 0"); + UDRS->fd_ref = 0; + } + floppy_release_irq_and_dma(); +} + +/* + * floppy_open check for aliasing (/dev/fd0 can be the same as + * /dev/PS0 etc), and disallows simultaneous access to the same + * drive with different device numbers. + */ +#define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0) + +static int floppy_open(struct inode * inode, struct file * filp) +{ + int drive; + int old_dev; + int try; + char *tmp; + + if (!filp) { + DPRINT("Weird, open called with filp=0\n"); + return -EIO; + } + + drive = DRIVE(inode->i_rdev); + if (drive >= N_DRIVE || + !(allowed_drive_mask & (1 << drive)) || + fdc_state[FDC(drive)].version == FDC_NONE) + return -ENXIO; + + if (TYPE(inode->i_rdev) >= NUMBER(floppy_type)) + return -ENXIO; + old_dev = UDRS->fd_device; + if (UDRS->fd_ref && old_dev != MINOR(inode->i_rdev)) + return -EBUSY; + + if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){ + USETF(FD_DISK_CHANGED); + USETF(FD_VERIFY); + } + + if (UDRS->fd_ref == -1 || + (UDRS->fd_ref && (filp->f_flags & O_EXCL))) + return -EBUSY; + + if (floppy_grab_irq_and_dma()) + return -EBUSY; + + if (filp->f_flags & O_EXCL) + UDRS->fd_ref = -1; + else + UDRS->fd_ref++; + + if (!floppy_track_buffer){ + /* if opening an ED drive, reserve a big buffer, + * else reserve a small one */ + if ((UDP->cmos == 6) || (UDP->cmos == 5)) + try = 64; /* Only 48 actually useful */ + else + try = 32; /* Only 24 actually useful */ + + tmp=(char *)fd_dma_mem_alloc(1024 * try); + if (!tmp) { + try >>= 1; /* buffer only one side */ + INFBOUND(try, 16); + tmp= (char *)fd_dma_mem_alloc(1024*try); + } + if (!tmp) { + DPRINT("Unable to allocate DMA memory\n"); + RETERR(ENXIO); + } + if (floppy_track_buffer) + fd_dma_mem_free((unsigned long)tmp,try*1024); + else { + buffer_min = buffer_max = -1; + floppy_track_buffer = tmp; + max_buffer_sectors = try; + } + } + + UDRS->fd_device = MINOR(inode->i_rdev); + if (old_dev != -1 && old_dev != MINOR(inode->i_rdev)) { + if (buffer_drive == drive) + buffer_track = -1; + invalidate_buffers(MKDEV(FLOPPY_MAJOR,old_dev)); + } + + /* Allow ioctls if we have write-permissions even if read-only open */ + if ((filp->f_mode & 2) || (permission(inode,2) == 0)) + filp->f_mode |= IOCTL_MODE_BIT; + if (filp->f_mode & 2) + filp->f_mode |= OPEN_WRITE_BIT; + + if (UFDCS->rawcmd == 1) + UFDCS->rawcmd = 2; + + if (filp->f_flags & O_NDELAY) + return 0; + if (filp->f_mode & 3) { + UDRS->last_checked = 0; + check_disk_change(inode->i_rdev); + if (UTESTF(FD_DISK_CHANGED)) + RETERR(ENXIO); + } + if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE))) + RETERR(EROFS); + return 0; +#undef RETERR +} + +/* + * Check if the disk has been changed or if a change has been faked. + */ +static int check_floppy_change(kdev_t dev) +{ + int drive = DRIVE(dev); + + if (MAJOR(dev) != MAJOR_NR) { + DPRINT("check_floppy_change: not a floppy\n"); + return 0; + } + + if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) + return 1; + + if (UDP->checkfreq < jiffies - UDRS->last_checked){ + lock_fdc(drive,0); + poll_drive(0,0); + process_fd_request(); + } + + if (UTESTF(FD_DISK_CHANGED) || + UTESTF(FD_VERIFY) || + test_bit(drive, &fake_change) || + (!TYPE(dev) && !current_type[drive])) + return 1; + return 0; +} + +/* revalidate the floppy disk, i.e. trigger format autodetection by reading + * the bootblock (block 0). "Autodetection" is also needed to check whether + * there is a disk in the drive at all... Thus we also do it for fixed + * geometry formats */ +static int floppy_revalidate(kdev_t dev) +{ +#define NO_GEOM (!current_type[drive] && !TYPE(dev)) + struct buffer_head * bh; + int drive=DRIVE(dev); + int cf; + + if (UTESTF(FD_DISK_CHANGED) || + UTESTF(FD_VERIFY) || + test_bit(drive, &fake_change) || + NO_GEOM){ + lock_fdc(drive,0); + cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); + if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){ + process_fd_request(); /*already done by another thread*/ + return 0; + } + UDRS->maxblock = 0; + UDRS->maxtrack = 0; + if (buffer_drive == drive) + buffer_track = -1; + clear_bit(drive, &fake_change); + UCLEARF(FD_DISK_CHANGED); + if (cf) + UDRS->generation++; + if (NO_GEOM){ + /* auto-sensing */ + int size = floppy_blocksizes[MINOR(dev)]; + if (!size) + size = 1024; + if (!(bh = getblk(dev,0,size))){ + process_fd_request(); + return 1; + } + if (bh && !buffer_uptodate(bh)) + ll_rw_block(READ, 1, &bh); + process_fd_request(); + wait_on_buffer(bh); + brelse(bh); + return 0; + } + if (cf) + poll_drive(0, FD_RAW_NEED_DISK); + process_fd_request(); + } + return 0; +} + +static struct file_operations floppy_fops = { + NULL, /* lseek - default */ + floppy_read, /* read - general block-dev read */ + floppy_write, /* write - general block-dev write */ + NULL, /* readdir - bad */ + NULL, /* select */ + fd_ioctl, /* ioctl */ + NULL, /* mmap */ + floppy_open, /* open */ + floppy_release, /* release */ + block_fsync, /* fsync */ + NULL, /* fasync */ + check_floppy_change, /* media_change */ + floppy_revalidate, /* revalidate */ +}; + +/* + * Floppy Driver initialization + * ============================= + */ + +/* Determine the floppy disk controller type */ +/* This routine was written by David C. Niemi */ +static char get_fdc_version(void) +{ + int r; + + output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ + if (FDCS->reset) + return FDC_NONE; + if ((r = result()) <= 0x00) + return FDC_NONE; /* No FDC present ??? */ + if ((r==1) && (reply_buffer[0] == 0x80)){ + printk(KERN_INFO "FDC %d is an 8272A\n",fdc); + return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ + } + if (r != 10) { + printk("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", + fdc, r); + return FDC_UNKNOWN; + } + + if(!fdc_configure()) { + printk(KERN_INFO "FDC %d is an 82072\n",fdc); + return FDC_82072; /* 82072 doesn't know CONFIGURE */ + } + + output_byte(FD_PERPENDICULAR); + if(need_more_output() == MORE_OUTPUT) { + output_byte(0); + } else { + printk(KERN_INFO "FDC %d is an 82072A\n", fdc); + return FDC_82072A; /* 82072A as found on Sparcs. */ + } + + output_byte(FD_UNLOCK); + r = result(); + if ((r == 1) && (reply_buffer[0] == 0x80)){ + printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc); + return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know + * LOCK/UNLOCK */ + } + if ((r != 1) || (reply_buffer[0] != 0x00)) { + printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", + fdc, r); + return FDC_UNKNOWN; + } + output_byte(FD_PARTID); + r = result(); + if (r != 1) { + printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", + fdc, r); + return FDC_UNKNOWN; + } + if (reply_buffer[0] == 0x80) { + printk(KERN_INFO "FDC %d is a post-1991 82077\n",fdc); + return FDC_82077; /* Revised 82077AA passes all the tests */ + } + switch (reply_buffer[0] >> 5) { + case 0x0: + /* Either a 82078-1 or a 82078SL running at 5Volt */ + printk(KERN_INFO "FDC %d is an 82078.\n",fdc); + return FDC_82078; + case 0x1: + printk(KERN_INFO "FDC %d is a 44pin 82078\n",fdc); + return FDC_82078; + case 0x2: + printk(KERN_INFO "FDC %d is a S82078B\n", fdc); + return FDC_S82078B; + case 0x3: + printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", fdc); + return FDC_87306; + default: + printk(KERN_INFO "FDC %d init: 82078 variant with unknown PARTID=%d.\n", + fdc, reply_buffer[0] >> 5); + return FDC_82078_UNKN; + } +} /* get_fdc_version */ + +/* lilo configuration */ + +/* we make the invert_dcl function global. One day, somebody might + * want to centralize all thinkpad related options into one lilo option, + * there are just so many thinkpad related quirks! */ +void floppy_invert_dcl(int *ints,int param) +{ + int i; + + for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ + if (param) + default_drive_params[i].params.flags |= 0x80; + else + default_drive_params[i].params.flags &= ~0x80; + } + DPRINT("Configuring drives for inverted dcl\n"); +} + +static void daring(int *ints,int param) +{ + int i; + + for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ + if (param){ + default_drive_params[i].params.select_delay = 0; + default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR; + } else { + default_drive_params[i].params.select_delay = 2*HZ/100; + default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR; + } + } + DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); +} + +static void set_cmos(int *ints, int dummy) +{ + int current_drive=0; + + if (ints[0] != 2){ + DPRINT("wrong number of parameter for cmos\n"); + return; + } + current_drive = ints[1]; + if (current_drive < 0 || current_drive >= 8){ + DPRINT("bad drive for set_cmos\n"); + return; + } + if (current_drive >= 4 && !FDC2) + FDC2 = 0x370; + if (ints[2] <= 0 || + (ints[2] >= NUMBER(default_drive_params) && ints[2] != 16)){ + DPRINT("bad cmos code %d\n", ints[2]); + return; + } + DP->cmos = ints[2]; + DPRINT("setting cmos code to %d\n", ints[2]); +} + +static struct param_table { + const char *name; + void (*fn)(int *ints, int param); + int *var; + int def_param; +} config_params[]={ + { "allowed_drive_mask", 0, &allowed_drive_mask, 0xff }, + { "all_drives", 0, &allowed_drive_mask, 0xff }, + { "asus_pci", 0, &allowed_drive_mask, 0x33 }, + + { "daring", daring, 0, 1}, + + { "two_fdc", 0, &FDC2, 0x370 }, + { "one_fdc", 0, &FDC2, 0 }, + + { "thinkpad", floppy_invert_dcl, 0, 1 }, + + { "nodma", 0, &use_virtual_dma, 1 }, + { "omnibook", 0, &use_virtual_dma, 1 }, + { "dma", 0, &use_virtual_dma, 0 }, + + { "fifo_depth", 0, &fifo_depth, 0xa }, + { "nofifo", 0, &no_fifo, 0x20 }, + { "usefifo", 0, &no_fifo, 0 }, + + { "cmos", set_cmos, 0, 0 }, + + { "unexpected_interrupts", 0, &print_unex, 1 }, + { "no_unexpected_interrupts", 0, &print_unex, 0 }, + { "L40SX", 0, &print_unex, 0 } }; + +#define FLOPPY_SETUP +void floppy_setup(char *str, int *ints) +{ + int i; + int param; + if (str) + for (i=0; i< ARRAY_SIZE(config_params); i++){ + if (strcmp(str,config_params[i].name) == 0){ + if (ints[0]) + param = ints[1]; + else + param = config_params[i].def_param; + if(config_params[i].fn) + config_params[i].fn(ints,param); + if(config_params[i].var) { + DPRINT("%s=%d\n", str, param); + *config_params[i].var = param; + } + return; + } + } + if (str) { + DPRINT("unknown floppy option [%s]\n", str); + + DPRINT("allowed options are:"); + for (i=0; i< ARRAY_SIZE(config_params); i++) + printk(" %s",config_params[i].name); + printk("\n"); + } else + DPRINT("botched floppy option\n"); + DPRINT("Read linux/drivers/block/README.fd\n"); +} + +int floppy_init(void) +{ + int i,unit,drive; + int have_no_fdc= -EIO; + + raw_cmd = 0; + + if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) { + printk("Unable to get major %d for floppy\n",MAJOR_NR); + return -EBUSY; + } + + for (i=0; i<256; i++) + if (ITYPE(i)) + floppy_sizes[i] = floppy_type[ITYPE(i)].size >> 1; + else + floppy_sizes[i] = MAX_DISK_SIZE; + + blk_size[MAJOR_NR] = floppy_sizes; + blksize_size[MAJOR_NR] = floppy_blocksizes; + blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; + reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); + config_types(); + + for (i = 0; i < N_FDC; i++) { + fdc = i; + CLEARSTRUCT(FDCS); + FDCS->dtr = -1; + FDCS->dor = 0x4; +#ifdef __sparc__ + /*sparcs don't have a DOR reset which we can fall back on to*/ + FDCS->version = FDC_82072A; +#endif + } + + fdc_state[0].address = FDC1; +#if N_FDC > 1 + fdc_state[1].address = FDC2; +#endif + + if (floppy_grab_irq_and_dma()){ + del_timer(&fd_timeout); + blk_dev[MAJOR_NR].request_fn = NULL; + unregister_blkdev(MAJOR_NR,"fd"); + return -EBUSY; + } + + /* initialise drive state */ + for (drive = 0; drive < N_DRIVE; drive++) { + CLEARSTRUCT(UDRS); + CLEARSTRUCT(UDRWE); + UDRS->flags = FD_VERIFY | FD_DISK_NEWCHANGE | FD_DISK_CHANGED; + UDRS->fd_device = -1; + floppy_track_buffer = NULL; + max_buffer_sectors = 0; + } + + for (i = 0; i < N_FDC; i++) { + fdc = i; + FDCS->driver_version = FD_DRIVER_VERSION; + for (unit=0; unit<4; unit++) + FDCS->track[unit] = 0; + if (FDCS->address == -1) + continue; + FDCS->rawcmd = 2; + if (user_reset_fdc(-1,FD_RESET_ALWAYS,0)){ + FDCS->address = -1; + FDCS->version = FDC_NONE; + continue; + } + /* Try to determine the floppy controller type */ + FDCS->version = get_fdc_version(); + if (FDCS->version == FDC_NONE){ + FDCS->address = -1; + continue; + } + + request_region(FDCS->address, 6, "floppy"); + request_region(FDCS->address+7, 1, "floppy DIR"); + /* address + 6 is reserved, and may be taken by IDE. + * Unfortunately, Adaptec doesn't know this :-(, */ + + have_no_fdc = 0; + /* Not all FDCs seem to be able to handle the version command + * properly, so force a reset for the standard FDC clones, + * to avoid interrupt garbage. + */ + user_reset_fdc(-1,FD_RESET_ALWAYS,0); + } + fdc=0; + del_timer(&fd_timeout); + current_drive = 0; + floppy_release_irq_and_dma(); + initialising=0; + if (have_no_fdc) { + DPRINT("no floppy controllers found\n"); + request_tq.routine = (void *)(void *) empty; + /* + * When we return we may be unloaded. This little + * trick forces the immediate_bh handler to have run + * before we unload it, lest we cause bad things. + */ + mark_bh(IMMEDIATE_BH); + schedule(); + if (usage_count) + floppy_release_irq_and_dma(); + blk_dev[MAJOR_NR].request_fn = NULL; + unregister_blkdev(MAJOR_NR,"fd"); + } + return have_no_fdc; +} + +static int floppy_grab_irq_and_dma(void) +{ + int i; + unsigned long flags; + + INT_OFF; + if (usage_count++){ + INT_ON; + return 0; + } + INT_ON; + MOD_INC_USE_COUNT; + for (i=0; i< N_FDC; i++){ + if (fdc_state[i].address != -1){ + fdc = i; + reset_fdc_info(1); + fd_outb(FDCS->dor, FD_DOR); + } + } + fdc = 0; + set_dor(0, ~0, 8); /* avoid immediate interrupt */ + + if (fd_request_irq()) { + DPRINT("Unable to grab IRQ%d for the floppy driver\n", + FLOPPY_IRQ); + MOD_DEC_USE_COUNT; + usage_count--; + return -1; + } + if (fd_request_dma()) { + DPRINT("Unable to grab DMA%d for the floppy driver\n", + FLOPPY_DMA); + fd_free_irq(); + MOD_DEC_USE_COUNT; + usage_count--; + return -1; + } + for (fdc = 0; fdc < N_FDC; fdc++) + if (FDCS->address != -1) + fd_outb(FDCS->dor, FD_DOR); + fdc = 0; + fd_enable_irq(); + irqdma_allocated=1; + return 0; +} + +static void floppy_release_irq_and_dma(void) +{ +#ifdef FLOPPY_SANITY_CHECK + int drive; +#endif + long tmpsize; + unsigned long tmpaddr; + unsigned long flags; + + INT_OFF; + if (--usage_count){ + INT_ON; + return; + } + INT_ON; + if(irqdma_allocated) + { + fd_disable_dma(); + fd_free_dma(); + fd_disable_irq(); + fd_free_irq(); + irqdma_allocated=0; + } + + set_dor(0, ~0, 8); +#if N_FDC > 1 + set_dor(1, ~8, 0); +#endif + floppy_enable_hlt(); + + if (floppy_track_buffer && max_buffer_sectors) { + tmpsize = max_buffer_sectors*1024; + tmpaddr = (unsigned long)floppy_track_buffer; + floppy_track_buffer = 0; + max_buffer_sectors = 0; + buffer_min = buffer_max = -1; + fd_dma_mem_free(tmpaddr, tmpsize); + } + +#ifdef FLOPPY_SANITY_CHECK +#ifndef __sparc__ + for (drive=0; drive < N_FDC * 4; drive++) + if (motor_off_timer[drive].next) + printk("motor off timer %d still active\n", drive); +#endif + + if (fd_timeout.next) + printk("floppy timer still active:%s\n", timeout_message); + if (fd_timer.next) + printk("auxiliary floppy timer still active\n"); + if (floppy_tq.sync) + printk("task queue still active\n"); +#endif + MOD_DEC_USE_COUNT; +} + + +#ifdef MODULE + +extern char *get_options(char *str, int *ints); + +char *floppy=NULL; + +static void parse_floppy_cfg_string(char *cfg) +{ + char *ptr; + int ints[11]; + + while(*cfg) { + for(ptr = cfg;*cfg && *cfg != ' ' && *cfg != '\t'; cfg++); + if(*cfg) { + *cfg = '\0'; + cfg++; + } + if(*ptr) + floppy_setup(get_options(ptr,ints),ints); + } +} + +static void mod_setup(char *pattern, void (*setup)(char *, int *)) +{ + unsigned long i; + char c; + int j; + int match; + char buffer[100]; + int ints[11]; + int length = strlen(pattern)+1; + + match=0; + j=1; + + for (i=current->mm->env_start; i< current->mm->env_end; i ++){ + c= get_fs_byte(i); + if (match){ + if (j==99) + c='\0'; + buffer[j] = c; + if (!c || c == ' ' || c == '\t'){ + if (j){ + buffer[j] = '\0'; + setup(get_options(buffer,ints),ints); + } + j=0; + } else + j++; + if (!c) + break; + continue; + } + if ((!j && !c) || (j && c == pattern[j-1])) + j++; + else + j=0; + if (j==length){ + match=1; + j=0; + } + } +} + + +#ifdef __cplusplus +extern "C" { +#endif +int init_module(void) +{ + printk(KERN_INFO "inserting floppy driver for %s\n", kernel_version); + + if(floppy) + parse_floppy_cfg_string(floppy); + else + mod_setup("floppy=", floppy_setup); + + return floppy_init(); +} + +void cleanup_module(void) +{ + int fdc, dummy; + + for (fdc=0; fdc<2; fdc++) + if (FDCS->address != -1){ + release_region(FDCS->address, 6); + release_region(FDCS->address+7, 1); + } + + unregister_blkdev(MAJOR_NR, "fd"); + + blk_dev[MAJOR_NR].request_fn = 0; + /* eject disk, if any */ + dummy = fd_eject(0); +} + +#ifdef __cplusplus +} +#endif + +#else +/* eject the boot floppy (if we need the drive for a different root floppy) */ +/* This should only be called at boot time when we're sure that there's no + * resource contention. */ +void floppy_eject(void) +{ + int dummy; + if(floppy_grab_irq_and_dma()==0) + { + lock_fdc(MAXTIMEOUT,0); + dummy=fd_eject(0); + process_fd_request(); + floppy_release_irq_and_dma(); + } +} +#endif diff --git a/linux/src/drivers/block/genhd.c b/linux/src/drivers/block/genhd.c new file mode 100644 index 00000000..ebee7ff5 --- /dev/null +++ b/linux/src/drivers/block/genhd.c @@ -0,0 +1,761 @@ +/* + * Code extracted from + * linux/kernel/hd.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * + * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug + * in the early extended-partition checks and added DM partitions + * + * Support for DiskManager v6.0x added by Mark Lord, + * with information provided by OnTrack. This now works for linux fdisk + * and LILO, as well as loadlin and bootln. Note that disks other than + * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1). + * + * More flexible handling of extended partitions - aeb, 950831 + * + * Check partition table on IDE disks for common CHS translations + */ + +#include <linux/config.h> +#include <linux/fs.h> +#include <linux/genhd.h> +#include <linux/kernel.h> +#include <linux/major.h> +#include <linux/string.h> +#ifdef CONFIG_BLK_DEV_INITRD +#include <linux/blk.h> +#endif + +#include <asm/system.h> + +/* + * Many architectures don't like unaligned accesses, which is + * frequently the case with the nr_sects and start_sect partition + * table entries. + */ +#include <asm/unaligned.h> + +#define SYS_IND(p) get_unaligned(&p->sys_ind) +#define NR_SECTS(p) get_unaligned(&p->nr_sects) +#define START_SECT(p) get_unaligned(&p->start_sect) + + +struct gendisk *gendisk_head = NULL; + +static int current_minor = 0; +extern int *blk_size[]; +extern void rd_load(void); +extern void initrd_load(void); + +extern int chr_dev_init(void); +extern int blk_dev_init(void); +extern int scsi_dev_init(void); +extern int net_dev_init(void); + +/* + * disk_name() is used by genhd.c and md.c. + * It formats the devicename of the indicated disk + * into the supplied buffer, and returns a pointer + * to that same buffer (for convenience). + */ +char *disk_name (struct gendisk *hd, int minor, char *buf) +{ + unsigned int part; + const char *maj = hd->major_name; + char unit = (minor >> hd->minor_shift) + 'a'; + +#ifdef CONFIG_BLK_DEV_IDE + /* + * IDE devices use multiple major numbers, but the drives + * are named as: {hda,hdb}, {hdc,hdd}, {hde,hdf}, {hdg,hdh}.. + * This requires special handling here. + */ + switch (hd->major) { + case IDE3_MAJOR: + unit += 2; + case IDE2_MAJOR: + unit += 2; + case IDE1_MAJOR: + unit += 2; + case IDE0_MAJOR: + maj = "hd"; + } +#endif + part = minor & ((1 << hd->minor_shift) - 1); + if (part) + sprintf(buf, "%s%c%d", maj, unit, part); + else + sprintf(buf, "%s%c", maj, unit); + return buf; +} + +static void add_partition (struct gendisk *hd, int minor, int start, int size) +{ + char buf[8]; + hd->part[minor].start_sect = start; + hd->part[minor].nr_sects = size; + printk(" %s", disk_name(hd, minor, buf)); +} + +static inline int is_extended_partition(struct partition *p) +{ + return (SYS_IND(p) == DOS_EXTENDED_PARTITION || + SYS_IND(p) == WIN98_EXTENDED_PARTITION || + SYS_IND(p) == LINUX_EXTENDED_PARTITION); +} + +#ifdef CONFIG_MSDOS_PARTITION +/* + * Create devices for each logical partition in an extended partition. + * The logical partitions form a linked list, with each entry being + * a partition table with two entries. The first entry + * is the real data partition (with a start relative to the partition + * table start). The second is a pointer to the next logical partition + * (with a start relative to the entire extended partition). + * We do not create a Linux partition for the partition tables, but + * only for the actual data partitions. + */ + +static void extended_partition(struct gendisk *hd, kdev_t dev) +{ + struct buffer_head *bh; + struct partition *p; + unsigned long first_sector, first_size, this_sector, this_size; + int mask = (1 << hd->minor_shift) - 1; + int i; + + first_sector = hd->part[MINOR(dev)].start_sect; + first_size = hd->part[MINOR(dev)].nr_sects; + this_sector = first_sector; + + while (1) { + if ((current_minor & mask) == 0) + return; + if (!(bh = bread(dev,0,1024))) + return; + /* + * This block is from a device that we're about to stomp on. + * So make sure nobody thinks this block is usable. + */ + bh->b_state = 0; + + if (*(unsigned short *) (bh->b_data+510) != 0xAA55) + goto done; + + p = (struct partition *) (0x1BE + bh->b_data); + + this_size = hd->part[MINOR(dev)].nr_sects; + + /* + * Usually, the first entry is the real data partition, + * the 2nd entry is the next extended partition, or empty, + * and the 3rd and 4th entries are unused. + * However, DRDOS sometimes has the extended partition as + * the first entry (when the data partition is empty), + * and OS/2 seems to use all four entries. + */ + + /* + * First process the data partition(s) + */ + for (i=0; i<4; i++, p++) { + if (!NR_SECTS(p) || is_extended_partition(p)) + continue; + + /* Check the 3rd and 4th entries - + these sometimes contain random garbage */ + if (i >= 2 + && START_SECT(p) + NR_SECTS(p) > this_size + && (this_sector + START_SECT(p) < first_sector || + this_sector + START_SECT(p) + NR_SECTS(p) > + first_sector + first_size)) + continue; + + add_partition(hd, current_minor, this_sector+START_SECT(p), NR_SECTS(p)); + current_minor++; + if ((current_minor & mask) == 0) + goto done; + } + /* + * Next, process the (first) extended partition, if present. + * (So far, there seems to be no reason to make + * extended_partition() recursive and allow a tree + * of extended partitions.) + * It should be a link to the next logical partition. + * Create a minor for this just long enough to get the next + * partition table. The minor will be reused for the next + * data partition. + */ + p -= 4; + for (i=0; i<4; i++, p++) + if(NR_SECTS(p) && is_extended_partition(p)) + break; + if (i == 4) + goto done; /* nothing left to do */ + + hd->part[current_minor].nr_sects = NR_SECTS(p); + hd->part[current_minor].start_sect = first_sector + START_SECT(p); + this_sector = first_sector + START_SECT(p); + dev = MKDEV(hd->major, current_minor); + brelse(bh); + } +done: + brelse(bh); +} + +#ifdef CONFIG_BSD_DISKLABEL +/* + * Create devices for BSD partitions listed in a disklabel, under a + * dos-like partition. See extended_partition() for more information. + */ +static void bsd_disklabel_partition(struct gendisk *hd, kdev_t dev) +{ + struct buffer_head *bh; + struct bsd_disklabel *l; + struct bsd_partition *p; + int mask = (1 << hd->minor_shift) - 1; + + if (!(bh = bread(dev,0,1024))) + return; + bh->b_state = 0; + l = (struct bsd_disklabel *) (bh->b_data+512); + if (l->d_magic != BSD_DISKMAGIC) { + brelse(bh); + return; + } + + p = &l->d_partitions[0]; + while (p - &l->d_partitions[0] <= BSD_MAXPARTITIONS) { + if ((current_minor & mask) >= (4 + hd->max_p)) + break; + + if (p->p_fstype != BSD_FS_UNUSED) { + add_partition(hd, current_minor, p->p_offset, p->p_size); + current_minor++; + } + p++; + } + brelse(bh); + +} +#endif + +static int msdos_partition(struct gendisk *hd, kdev_t dev, unsigned long first_sector) +{ + int i, minor = current_minor; + struct buffer_head *bh; + struct partition *p; + unsigned char *data; + int mask = (1 << hd->minor_shift) - 1; +#ifdef CONFIG_BLK_DEV_IDE + int tested_for_xlate = 0; + +read_mbr: +#endif + if (!(bh = bread(dev,0,1024))) { + printk(" unable to read partition table\n"); + return -1; + } + data = bh->b_data; + /* In some cases we modify the geometry */ + /* of the drive (below), so ensure that */ + /* nobody else tries to re-use this data. */ + bh->b_state = 0; +#ifdef CONFIG_BLK_DEV_IDE +check_table: +#endif + if (*(unsigned short *) (0x1fe + data) != 0xAA55) { + brelse(bh); + return 0; + } + p = (struct partition *) (0x1be + data); + +#ifdef CONFIG_BLK_DEV_IDE + if (!tested_for_xlate++) { /* Do this only once per disk */ + /* + * Look for various forms of IDE disk geometry translation + */ + extern int ide_xlate_1024(kdev_t, int, const char *); + unsigned int sig = *(unsigned short *)(data + 2); + if (SYS_IND(p) == EZD_PARTITION) { + /* + * The remainder of the disk must be accessed using + * a translated geometry that reduces the number of + * apparent cylinders to less than 1024 if possible. + * + * ide_xlate_1024() will take care of the necessary + * adjustments to fool fdisk/LILO and partition check. + */ + if (ide_xlate_1024(dev, -1, " [EZD]")) { + data += 512; + goto check_table; + } + } else if (SYS_IND(p) == DM6_PARTITION) { + + /* + * Everything on the disk is offset by 63 sectors, + * including a "new" MBR with its own partition table, + * and the remainder of the disk must be accessed using + * a translated geometry that reduces the number of + * apparent cylinders to less than 1024 if possible. + * + * ide_xlate_1024() will take care of the necessary + * adjustments to fool fdisk/LILO and partition check. + */ + if (ide_xlate_1024(dev, 1, " [DM6:DDO]")) { + brelse(bh); + goto read_mbr; /* start over with new MBR */ + } + } else if (sig <= 0x1ae && *(unsigned short *)(data + sig) == 0x55AA + && (1 & *(unsigned char *)(data + sig + 2)) ) + { + /* + * DM6 signature in MBR, courtesy of OnTrack + */ + (void) ide_xlate_1024 (dev, 0, " [DM6:MBR]"); + } else if (SYS_IND(p) == DM6_AUX1PARTITION || SYS_IND(p) == DM6_AUX3PARTITION) { + /* + * DM6 on other than the first (boot) drive + */ + (void) ide_xlate_1024(dev, 0, " [DM6:AUX]"); + } else { + /* + * Examine the partition table for common translations. + * This is necessary for drives for situations where + * the translated geometry is unavailable from the BIOS. + */ + for (i = 0; i < 4 ; i++) { + struct partition *q = &p[i]; + if (NR_SECTS(q) + && (q->sector & 63) == 1 + && (q->end_sector & 63) == 63) { + unsigned int heads = q->end_head + 1; + if (heads == 32 || heads == 64 || heads == 128 || heads == 255) { + + (void) ide_xlate_1024(dev, heads, " [PTBL]"); + break; + } + } + } + } + } +#endif /* CONFIG_BLK_DEV_IDE */ + + current_minor += 4; /* first "extra" minor (for extended partitions) */ + for (i=1 ; i<=4 ; minor++,i++,p++) { + if (!NR_SECTS(p)) + continue; + add_partition(hd, minor, first_sector+START_SECT(p), NR_SECTS(p)); + if (is_extended_partition(p)) { + printk(" <"); + /* + * If we are rereading the partition table, we need + * to set the size of the partition so that we will + * be able to bread the block containing the extended + * partition info. + */ + hd->sizes[minor] = hd->part[minor].nr_sects + >> (BLOCK_SIZE_BITS - 9); + extended_partition(hd, MKDEV(hd->major, minor)); + printk(" >"); + /* prevent someone doing mkfs or mkswap on an + extended partition, but leave room for LILO */ + if (hd->part[minor].nr_sects > 2) + hd->part[minor].nr_sects = 2; + } +#ifdef CONFIG_BSD_DISKLABEL + if (SYS_IND(p) == BSD_PARTITION) { + printk(" <"); + bsd_disklabel_partition(hd, MKDEV(hd->major, minor)); + printk(" >"); + } +#endif + } + /* + * Check for old-style Disk Manager partition table + */ + if (*(unsigned short *) (data+0xfc) == 0x55AA) { + p = (struct partition *) (0x1be + data); + for (i = 4 ; i < 16 ; i++, current_minor++) { + p--; + if ((current_minor & mask) == 0) + break; + if (!(START_SECT(p) && NR_SECTS(p))) + continue; + add_partition(hd, current_minor, START_SECT(p), NR_SECTS(p)); + } + } + printk("\n"); + brelse(bh); + return 1; +} + +#endif /* CONFIG_MSDOS_PARTITION */ + +#ifdef CONFIG_OSF_PARTITION + +static int osf_partition(struct gendisk *hd, unsigned int dev, unsigned long first_sector) +{ + int i; + int mask = (1 << hd->minor_shift) - 1; + struct buffer_head *bh; + struct disklabel { + u32 d_magic; + u16 d_type,d_subtype; + u8 d_typename[16]; + u8 d_packname[16]; + u32 d_secsize; + u32 d_nsectors; + u32 d_ntracks; + u32 d_ncylinders; + u32 d_secpercyl; + u32 d_secprtunit; + u16 d_sparespertrack; + u16 d_sparespercyl; + u32 d_acylinders; + u16 d_rpm, d_interleave, d_trackskew, d_cylskew; + u32 d_headswitch, d_trkseek, d_flags; + u32 d_drivedata[5]; + u32 d_spare[5]; + u32 d_magic2; + u16 d_checksum; + u16 d_npartitions; + u32 d_bbsize, d_sbsize; + struct d_partition { + u32 p_size; + u32 p_offset; + u32 p_fsize; + u8 p_fstype; + u8 p_frag; + u16 p_cpg; + } d_partitions[8]; + } * label; + struct d_partition * partition; +#define DISKLABELMAGIC (0x82564557UL) + + if (!(bh = bread(dev,0,1024))) { + printk("unable to read partition table\n"); + return -1; + } + label = (struct disklabel *) (bh->b_data+64); + partition = label->d_partitions; + if (label->d_magic != DISKLABELMAGIC) { + printk("magic: %08x\n", label->d_magic); + brelse(bh); + return 0; + } + if (label->d_magic2 != DISKLABELMAGIC) { + printk("magic2: %08x\n", label->d_magic2); + brelse(bh); + return 0; + } + for (i = 0 ; i < label->d_npartitions; i++, partition++) { + if ((current_minor & mask) == 0) + break; + if (partition->p_size) + add_partition(hd, current_minor, + first_sector+partition->p_offset, + partition->p_size); + current_minor++; + } + printk("\n"); + brelse(bh); + return 1; +} + +#endif /* CONFIG_OSF_PARTITION */ + +#ifdef CONFIG_SUN_PARTITION + +static int sun_partition(struct gendisk *hd, kdev_t dev, unsigned long first_sector) +{ + int i, csum; + unsigned short *ush; + struct buffer_head *bh; + struct sun_disklabel { + unsigned char info[128]; /* Informative text string */ + unsigned char spare[292]; /* Boot information etc. */ + unsigned short rspeed; /* Disk rotational speed */ + unsigned short pcylcount; /* Physical cylinder count */ + unsigned short sparecyl; /* extra sects per cylinder */ + unsigned char spare2[4]; /* More magic... */ + unsigned short ilfact; /* Interleave factor */ + unsigned short ncyl; /* Data cylinder count */ + unsigned short nacyl; /* Alt. cylinder count */ + unsigned short ntrks; /* Tracks per cylinder */ + unsigned short nsect; /* Sectors per track */ + unsigned char spare3[4]; /* Even more magic... */ + struct sun_partition { + __u32 start_cylinder; + __u32 num_sectors; + } partitions[8]; + unsigned short magic; /* Magic number */ + unsigned short csum; /* Label xor'd checksum */ + } * label; + struct sun_partition *p; + int other_endian; + unsigned long spc; +#define SUN_LABEL_MAGIC 0xDABE +#define SUN_LABEL_MAGIC_SWAPPED 0xBEDA +/* No need to optimize these macros since they are called only when reading + * the partition table. This occurs only at each disk change. */ +#define SWAP16(x) (other_endian ? (((__u16)(x) & 0xFF) << 8) \ + | (((__u16)(x) & 0xFF00) >> 8) \ + : (__u16)(x)) +#define SWAP32(x) (other_endian ? (((__u32)(x) & 0xFF) << 24) \ + | (((__u32)(x) & 0xFF00) << 8) \ + | (((__u32)(x) & 0xFF0000) >> 8) \ + | (((__u32)(x) & 0xFF000000) >> 24) \ + : (__u32)(x)) + + if(!(bh = bread(dev, 0, 1024))) { + printk("Dev %s: unable to read partition table\n", + kdevname(dev)); + return -1; + } + label = (struct sun_disklabel *) bh->b_data; + p = label->partitions; + if (label->magic != SUN_LABEL_MAGIC && label->magic != SUN_LABEL_MAGIC_SWAPPED) { + printk("Dev %s Sun disklabel: bad magic %04x\n", + kdevname(dev), label->magic); + brelse(bh); + return 0; + } + other_endian = (label->magic == SUN_LABEL_MAGIC_SWAPPED); + /* Look at the checksum */ + ush = ((unsigned short *) (label+1)) - 1; + for(csum = 0; ush >= ((unsigned short *) label);) + csum ^= *ush--; + if(csum) { + printk("Dev %s Sun disklabel: Csum bad, label corrupted\n", + kdevname(dev)); + brelse(bh); + return 0; + } + /* All Sun disks have 8 partition entries */ + spc = SWAP16(label->ntrks) * SWAP16(label->nsect); + for(i=0; i < 8; i++, p++) { + unsigned long st_sector; + + /* We register all partitions, even if zero size, so that + * the minor numbers end up ok as per SunOS interpretation. + */ + st_sector = first_sector + SWAP32(p->start_cylinder) * spc; + add_partition(hd, current_minor, st_sector, SWAP32(p->num_sectors)); + current_minor++; + } + printk("\n"); + brelse(bh); + return 1; +#undef SWAP16 +#undef SWAP32 +} + +#endif /* CONFIG_SUN_PARTITION */ + +#ifdef CONFIG_AMIGA_PARTITION +#include <asm/byteorder.h> +#include <linux/affs_hardblocks.h> + +static __inline__ __u32 +checksum_block(__u32 *m, int size) +{ + __u32 sum = 0; + + while (size--) + sum += htonl(*m++); + return sum; +} + +static int +amiga_partition(struct gendisk *hd, unsigned int dev, unsigned long first_sector) +{ + struct buffer_head *bh; + struct RigidDiskBlock *rdb; + struct PartitionBlock *pb; + int start_sect; + int nr_sects; + int blk; + int part, res; + + set_blocksize(dev,512); + res = 0; + + for (blk = 0; blk < RDB_ALLOCATION_LIMIT; blk++) { + if(!(bh = bread(dev,blk,512))) { + printk("Dev %d: unable to read RDB block %d\n",dev,blk); + goto rdb_done; + } + if (*(__u32 *)bh->b_data == htonl(IDNAME_RIGIDDISK)) { + rdb = (struct RigidDiskBlock *)bh->b_data; + if (checksum_block((__u32 *)bh->b_data,htonl(rdb->rdb_SummedLongs) & 0x7F)) { + printk("Dev %d: RDB in block %d has bad checksum\n",dev,blk); + brelse(bh); + continue; + } + printk(" RDSK"); + blk = htonl(rdb->rdb_PartitionList); + brelse(bh); + for (part = 1; blk > 0 && part <= 16; part++) { + if (!(bh = bread(dev,blk,512))) { + printk("Dev %d: unable to read partition block %d\n", + dev,blk); + goto rdb_done; + } + pb = (struct PartitionBlock *)bh->b_data; + blk = htonl(pb->pb_Next); + if (pb->pb_ID == htonl(IDNAME_PARTITION) && checksum_block( + (__u32 *)pb,htonl(pb->pb_SummedLongs) & 0x7F) == 0 ) { + + /* Tell Kernel about it */ + + if (!(nr_sects = (htonl(pb->pb_Environment[10]) + 1 - + htonl(pb->pb_Environment[9])) * + htonl(pb->pb_Environment[3]) * + htonl(pb->pb_Environment[5]))) { + continue; + } + start_sect = htonl(pb->pb_Environment[9]) * + htonl(pb->pb_Environment[3]) * + htonl(pb->pb_Environment[5]); + add_partition(hd,current_minor,start_sect,nr_sects); + current_minor++; + res = 1; + } + brelse(bh); + } + printk("\n"); + break; + } + } + +rdb_done: + set_blocksize(dev,BLOCK_SIZE); + return res; +} +#endif /* CONFIG_AMIGA_PARTITION */ + +static void check_partition(struct gendisk *hd, kdev_t dev) +{ + static int first_time = 1; + unsigned long first_sector; + char buf[8]; + + if (first_time) + printk("Partition check:\n"); + first_time = 0; + first_sector = hd->part[MINOR(dev)].start_sect; + + /* + * This is a kludge to allow the partition check to be + * skipped for specific drives (e.g. IDE cd-rom drives) + */ + if ((int)first_sector == -1) { + hd->part[MINOR(dev)].start_sect = 0; + return; + } + + printk(" %s:", disk_name(hd, MINOR(dev), buf)); +#ifdef CONFIG_MSDOS_PARTITION + if (msdos_partition(hd, dev, first_sector)) + return; +#endif +#ifdef CONFIG_OSF_PARTITION + if (osf_partition(hd, dev, first_sector)) + return; +#endif +#ifdef CONFIG_SUN_PARTITION + if(sun_partition(hd, dev, first_sector)) + return; +#endif +#ifdef CONFIG_AMIGA_PARTITION + if(amiga_partition(hd, dev, first_sector)) + return; +#endif + printk(" unknown partition table\n"); +} + +/* This function is used to re-read partition tables for removable disks. + Much of the cleanup from the old partition tables should have already been + done */ + +/* This function will re-read the partition tables for a given device, +and set things back up again. There are some important caveats, +however. You must ensure that no one is using the device, and no one +can start using the device while this function is being executed. */ + +void resetup_one_dev(struct gendisk *dev, int drive) +{ + int i; + int first_minor = drive << dev->minor_shift; + int end_minor = first_minor + dev->max_p; + + blk_size[dev->major] = NULL; + current_minor = 1 + first_minor; + check_partition(dev, MKDEV(dev->major, first_minor)); + + /* + * We need to set the sizes array before we will be able to access + * any of the partitions on this device. + */ + if (dev->sizes != NULL) { /* optional safeguard in ll_rw_blk.c */ + for (i = first_minor; i < end_minor; i++) + dev->sizes[i] = dev->part[i].nr_sects >> (BLOCK_SIZE_BITS - 9); + blk_size[dev->major] = dev->sizes; + } +} + +static void setup_dev(struct gendisk *dev) +{ + int i, drive; + int end_minor = dev->max_nr * dev->max_p; + + blk_size[dev->major] = NULL; + for (i = 0 ; i < end_minor; i++) { + dev->part[i].start_sect = 0; + dev->part[i].nr_sects = 0; + } + dev->init(dev); + for (drive = 0 ; drive < dev->nr_real ; drive++) { + int first_minor = drive << dev->minor_shift; + current_minor = 1 + first_minor; + check_partition(dev, MKDEV(dev->major, first_minor)); + } + if (dev->sizes != NULL) { /* optional safeguard in ll_rw_blk.c */ + for (i = 0; i < end_minor; i++) + dev->sizes[i] = dev->part[i].nr_sects >> (BLOCK_SIZE_BITS - 9); + blk_size[dev->major] = dev->sizes; + } +} + +void device_setup(void) +{ + extern void console_map_init(void); + struct gendisk *p; + int nr=0; + + chr_dev_init(); + blk_dev_init(); + sti(); +#ifdef CONFIG_SCSI + scsi_dev_init(); +#endif +#ifdef CONFIG_INET + net_dev_init(); +#endif + console_map_init(); + + for (p = gendisk_head ; p ; p=p->next) { + setup_dev(p); + nr += p->nr_real; + } +#ifdef CONFIG_BLK_DEV_RAM +#ifdef CONFIG_BLK_DEV_INITRD + if (initrd_start && mount_initrd) initrd_load(); + else +#endif + rd_load(); +#endif +} diff --git a/linux/src/drivers/block/ide-cd.c b/linux/src/drivers/block/ide-cd.c new file mode 100644 index 00000000..825d9425 --- /dev/null +++ b/linux/src/drivers/block/ide-cd.c @@ -0,0 +1,2775 @@ +/* #define VERBOSE_IDE_CD_ERRORS 1 */ +/* + * linux/drivers/block/ide-cd.c + * ATAPI cd-rom driver. To be used with ide.c. + * See Documentation/cdrom/ide-cd for usage information. + * + * Copyright (C) 1994, 1995, 1996 scott snyder <snyder@fnald0.fnal.gov> + * Copyright (C) 1996, 1997 Erik Andersen <andersee@debian.org> + * Copyright (C) 1998 Jens Axboe and Chris Zwilling + * + * May be copied or modified under the terms of the GNU General Public License + * see linux/COPYING for more information. + * + * 1.00 Oct 31, 1994 -- Initial version. + * 1.01 Nov 2, 1994 -- Fixed problem with starting request in + * cdrom_check_status. + * 1.03 Nov 25, 1994 -- leaving unmask_intr[] as a user-setting (as for disks) + * (from mlord) -- minor changes to cdrom_setup() + * -- renamed ide_dev_s to ide_drive_t, enable irq on command + * 2.00 Nov 27, 1994 -- Generalize packet command interface; + * add audio ioctls. + * 2.01 Dec 3, 1994 -- Rework packet command interface to handle devices + * which send an interrupt when ready for a command. + * 2.02 Dec 11, 1994 -- Cache the TOC in the driver. + * Don't use SCMD_PLAYAUDIO_TI; it's not included + * in the current version of ATAPI. + * Try to use LBA instead of track or MSF addressing + * when possible. + * Don't wait for READY_STAT. + * 2.03 Jan 10, 1995 -- Rewrite block read routines to handle block sizes + * other than 2k and to move multiple sectors in a + * single transaction. + * 2.04 Apr 21, 1995 -- Add work-around for Creative Labs CD220E drives. + * Thanks to Nick Saw <cwsaw@pts7.pts.mot.com> for + * help in figuring this out. Ditto for Acer and + * Aztech drives, which seem to have the same problem. + * 2.04b May 30, 1995 -- Fix to match changes in ide.c version 3.16 -ml + * 2.05 Jun 8, 1995 -- Don't attempt to retry after an illegal request + * or data protect error. + * Use HWIF and DEV_HWIF macros as in ide.c. + * Always try to do a request_sense after + * a failed command. + * Include an option to give textual descriptions + * of ATAPI errors. + * Fix a bug in handling the sector cache which + * showed up if the drive returned data in 512 byte + * blocks (like Pioneer drives). Thanks to + * Richard Hirst <srh@gpt.co.uk> for diagnosing this. + * Properly supply the page number field in the + * MODE_SELECT command. + * PLAYAUDIO12 is broken on the Aztech; work around it. + * 2.05x Aug 11, 1995 -- lots of data structure renaming/restructuring in ide.c + * (my apologies to Scott, but now ide-cd.c is independent) + * 3.00 Aug 22, 1995 -- Implement CDROMMULTISESSION ioctl. + * Implement CDROMREADAUDIO ioctl (UNTESTED). + * Use input_ide_data() and output_ide_data(). + * Add door locking. + * Fix usage count leak in cdrom_open, which happened + * when a read-write mount was attempted. + * Try to load the disk on open. + * Implement CDROMEJECT_SW ioctl (off by default). + * Read total cdrom capacity during open. + * Rearrange logic in cdrom_decode_status. Issue + * request sense commands for failed packet commands + * from here instead of from cdrom_queue_packet_command. + * Fix a race condition in retrieving error information. + * Suppress printing normal unit attention errors and + * some drive not ready errors. + * Implement CDROMVOLREAD ioctl. + * Implement CDROMREADMODE1/2 ioctls. + * Fix race condition in setting up interrupt handlers + * when the `serialize' option is used. + * 3.01 Sep 2, 1995 -- Fix ordering of reenabling interrupts in + * cdrom_queue_request. + * Another try at using ide_[input,output]_data. + * 3.02 Sep 16, 1995 -- Stick total disk capacity in partition table as well. + * Make VERBOSE_IDE_CD_ERRORS dump failed command again. + * Dump out more information for ILLEGAL REQUEST errs. + * Fix handling of errors occurring before the + * packet command is transferred. + * Fix transfers with odd bytelengths. + * 3.03 Oct 27, 1995 -- Some Creative drives have an id of just `CD'. + * `DCI-2S10' drives are broken too. + * 3.04 Nov 20, 1995 -- So are Vertos drives. + * 3.05 Dec 1, 1995 -- Changes to go with overhaul of ide.c and ide-tape.c + * 3.06 Dec 16, 1995 -- Add support needed for partitions. + * More workarounds for Vertos bugs (based on patches + * from Holger Dietze <dietze@aix520.informatik.uni-leipzig.de>). + * Try to eliminate byteorder assumptions. + * Use atapi_cdrom_subchnl struct definition. + * Add STANDARD_ATAPI compilation option. + * 3.07 Jan 29, 1996 -- More twiddling for broken drives: Sony 55D, + * Vertos 300. + * Add NO_DOOR_LOCKING configuration option. + * Handle drive_cmd requests w/NULL args (for hdparm -t). + * Work around sporadic Sony55e audio play problem. + * 3.07a Feb 11, 1996 -- check drive->id for NULL before dereferencing, to fix + * problem with "hde=cdrom" with no drive present. -ml + * 3.08 Mar 6, 1996 -- More Vertos workarounds. + * 3.09 Apr 5, 1996 -- Add CDROMCLOSETRAY ioctl. + * Switch to using MSF addressing for audio commands. + * Reformat to match kernel tabbing style. + * Add CDROM_GET_UPC ioctl. + * 3.10 Apr 10, 1996 -- Fix compilation error with STANDARD_ATAPI. + * 3.11 Apr 29, 1996 -- Patch from Heiko Eissfeldt <heiko@colossus.escape.de> + * to remove redundant verify_area calls. + * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches + * from Gerhard Zuber <zuber@berlin.snafu.de>. + * Let open succeed even if there's no loaded disc. + * 3.13 May 19, 1996 -- Fixes for changer code. + * 3.14 May 29, 1996 -- Add work-around for Vertos 600. + * (From Hennus Bergman <hennus@sky.ow.nl>.) + * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers + * from Ben Galliart <bgallia@luc.edu> with + * special help from Jeff Lightfoot + * <jeffml@netcom.com> + * 3.15a July 9, 1996 -- Improved Sanyo 3 CD changer identification + * 3.16 Jul 28, 1996 -- Fix from Gadi to reduce kernel stack usage for ioctl. + * 3.17 Sep 17, 1996 -- Tweak audio reads for some drives. + * Start changing CDROMLOADFROMSLOT to CDROM_SELECT_DISC. + * + * 3.19 Nov 5, 1996 -- New ide-cd maintainer: + * Erik B. Andersen <andersee@debian.org> + * 3.20 Jan 13,1997 -- Bug Fixes: + * Fix errors on CDROMSTOP (If you have a "Dolphin", + * you must define IHAVEADOLPHIN) + * Added identifier so new Sanyo CD-changer works + * Better detection if door locking isn't supported + * 3.21 Jun 16,1997 -- Add work-around for GCD-R580B + * + * 3.22 Nov 13, 1998 -- New ide-cd maintainers: + * Jens Axboe <axboe@image.dk> + * Chris Zwilling <chris@cloudnet.com> + * + * NOTE: Direct audio reads will only work on some types of drive. + * So far, i've received reports of success for Sony and Toshiba drives. + * + * ALSO NOTE: + * + * The ide cdrom driver has undergone extensive changes for the + * latest development kernel. If you wish to add new features to + * this driver, make your changes to the latest version in the + * development kernel. Only Bug fixes will be accepted for this + * version. + * + * For those wishing to work on this driver, please be sure you download + * and comply with the latest ATAPI standard. This document can be + * obtained by anonymous ftp from fission.dt.wdc.com in directory: + * /pub/standards/atapi/spec/SFF8020-r2.6/PDF/8020r26.pdf + * + */ + + +/***************************************************************************/ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/malloc.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/blkdev.h> +#include <linux/errno.h> +#include <linux/hdreg.h> +#include <linux/cdrom.h> +#include <linux/ucdrom.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/byteorder.h> +#include <asm/segment.h> +#include <asm/unaligned.h> + +#include "ide.h" + + + +/* Turn this on to have the driver print out the meanings of the + ATAPI error codes. This will use up additional kernel-space + memory, though. */ + +#ifndef VERBOSE_IDE_CD_ERRORS +#define VERBOSE_IDE_CD_ERRORS 0 +#endif + + +/* Turning this on will remove code to work around various nonstandard + ATAPI implementations. If you know your drive follows the standard, + this will give you a slightly smaller kernel. */ + +#ifndef STANDARD_ATAPI +#define STANDARD_ATAPI 0 +#endif + + +/* Turning this on will disable the door-locking functionality. + This is apparently needed for supermount. */ + +#ifndef NO_DOOR_LOCKING +#define NO_DOOR_LOCKING 0 +#endif + + +/* Size of buffer to allocate, in blocks, for audio reads. */ + +#ifndef CDROM_NBLOCKS_BUFFER +#define CDROM_NBLOCKS_BUFFER 8 +#endif + + +/************************************************************************/ + +#define SECTOR_SIZE 512 +#define SECTOR_BITS 9 +#define SECTORS_PER_FRAME (CD_FRAMESIZE / SECTOR_SIZE) + +#define MIN(a,b) ((a) < (b) ? (a) : (b)) + +/* special command codes for strategy routine. */ +#define PACKET_COMMAND 4315 +#define REQUEST_SENSE_COMMAND 4316 +#define RESET_DRIVE_COMMAND 4317 + +/* Some ATAPI command opcodes (just like SCSI). + (Some other cdrom-specific codes are in cdrom.h.) */ +#define TEST_UNIT_READY 0x00 +#define REQUEST_SENSE 0x03 +#define START_STOP 0x1b +#define ALLOW_MEDIUM_REMOVAL 0x1e +#define READ_CAPACITY 0x25 +#define READ_10 0x28 +#define MODE_SENSE_10 0x5a +#define MODE_SELECT_10 0x55 +#define READ_CD 0xbe + +#define LOAD_UNLOAD 0xa6 + + +/* ATAPI sense keys (mostly copied from scsi.h). */ + +#define NO_SENSE 0x00 +#define RECOVERED_ERROR 0x01 +#define NOT_READY 0x02 +#define MEDIUM_ERROR 0x03 +#define HARDWARE_ERROR 0x04 +#define ILLEGAL_REQUEST 0x05 +#define UNIT_ATTENTION 0x06 +#define DATA_PROTECT 0x07 +#define ABORTED_COMMAND 0x0b +#define MISCOMPARE 0x0e + +/* We want some additional flags for cd-rom drives. + To save space in the ide_drive_t struct, use some fields which + doesn't make sense for cd-roms -- `bios_sect' and `bios_head'. */ + +/* Configuration flags. These describe the capabilities of the drive. + They generally do not change after initialization, unless we learn + more about the drive from stuff failing. */ +struct ide_cd_config_flags { + __u8 drq_interrupt : 1; /* Device sends an interrupt when ready + for a packet command. */ + __u8 no_doorlock : 1; /* Drive cannot lock the door. */ +#if ! STANDARD_ATAPI + __u8 old_readcd : 1; /* Drive uses old READ CD opcode. */ + __u8 playmsf_as_bcd : 1; /* PLAYMSF command takes BCD args. */ + __u8 tocaddr_as_bcd : 1; /* TOC addresses are in BCD. */ + __u8 toctracks_as_bcd : 1; /* TOC track numbers are in BCD. */ + __u8 subchan_as_bcd : 1; /* Subchannel info is in BCD. */ +#endif /* not STANDARD_ATAPI */ + __u8 reserved : 1; +}; +#define CDROM_CONFIG_FLAGS(drive) ((struct ide_cd_config_flags *)&((drive)->bios_sect)) + + +/* State flags. These give information about the current state of the + drive, and will change during normal operation. */ +struct ide_cd_state_flags { + __u8 media_changed : 1; /* Driver has noticed a media change. */ + __u8 toc_valid : 1; /* Saved TOC information is current. */ + __u8 door_locked : 1; /* We think that the drive door is locked. */ + __u8 eject_on_close: 1; /* Drive should eject when device is closed. */ + __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */ + __u8 reserved : 2; +}; +#define CDROM_STATE_FLAGS(drive) ((struct ide_cd_state_flags *)&((drive)->bios_head)) + + +#define SECTOR_BUFFER_SIZE CD_FRAMESIZE + + + +/**************************************************************************** + * Routines to read and write data from/to the drive, using + * the routines input_ide_data() and output_ide_data() from ide.c. + * + * These routines will round up any request for an odd number of bytes, + * so if an odd bytecount is specified, be sure that there's at least one + * extra byte allocated for the buffer. + */ + + +static inline +void cdrom_in_bytes (ide_drive_t *drive, void *buffer, uint bytecount) +{ + ++bytecount; + ide_input_data (drive, buffer, bytecount / 4); + if ((bytecount & 0x03) >= 2) { + insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1); + } +} + + +static inline +void cdrom_out_bytes (ide_drive_t *drive, void *buffer, uint bytecount) +{ + ++bytecount; + ide_output_data (drive, buffer, bytecount / 4); + if ((bytecount & 0x03) >= 2) { + outsw (IDE_DATA_REG, + ((byte *)buffer) + (bytecount & ~0x03), 1); + } +} + + + +/**************************************************************************** + * Descriptions of ATAPI error codes. + */ + +#define ARY_LEN(a) ((sizeof(a) / sizeof(a[0]))) + +#if VERBOSE_IDE_CD_ERRORS + +/* From Table 124 of the ATAPI 1.2 spec. */ + +char *sense_key_texts[16] = { + "No sense data", + "Recovered error", + "Not ready", + "Medium error", + "Hardware error", + "Illegal request", + "Unit attention", + "Data protect", + "(reserved)", + "(reserved)", + "(reserved)", + "Aborted command", + "(reserved)", + "(reserved)", + "Miscompare", + "(reserved)", +}; + + +/* From Table 125 of the ATAPI 1.2 spec. */ + +struct { + short asc_ascq; + char *text; +} sense_data_texts[] = { + { 0x0000, "No additional sense information" }, + { 0x0011, "Audio play operation in progress" }, + { 0x0012, "Audio play operation paused" }, + { 0x0013, "Audio play operation successfully completed" }, + { 0x0014, "Audio play operation stopped due to error" }, + { 0x0015, "No current audio status to return" }, + + { 0x0200, "No seek complete" }, + + { 0x0400, "Logical unit not ready - cause not reportable" }, + { 0x0401, + "Logical unit not ready - in progress (sic) of becoming ready" }, + { 0x0402, "Logical unit not ready - initializing command required" }, + { 0x0403, "Logical unit not ready - manual intervention required" }, + + { 0x0600, "No reference position found" }, + + { 0x0900, "Track following error" }, + { 0x0901, "Tracking servo failure" }, + { 0x0902, "Focus servo failure" }, + { 0x0903, "Spindle servo failure" }, + + { 0x1100, "Unrecovered read error" }, + { 0x1106, "CIRC unrecovered error" }, + + { 0x1500, "Random positioning error" }, + { 0x1501, "Mechanical positioning error" }, + { 0x1502, "Positioning error detected by read of medium" }, + + { 0x1700, "Recovered data with no error correction applied" }, + { 0x1701, "Recovered data with retries" }, + { 0x1702, "Recovered data with positive head offset" }, + { 0x1703, "Recovered data with negative head offset" }, + { 0x1704, "Recovered data with retries and/or CIRC applied" }, + { 0x1705, "Recovered data using previous sector ID" }, + + { 0x1800, "Recovered data with error correction applied" }, + { 0x1801, "Recovered data with error correction and retries applied" }, + { 0x1802, "Recovered data - the data was auto-reallocated" }, + { 0x1803, "Recovered data with CIRC" }, + { 0x1804, "Recovered data with L-EC" }, + { 0x1805, "Recovered data - recommend reassignment" }, + { 0x1806, "Recovered data - recommend rewrite" }, + + { 0x1a00, "Parameter list length error" }, + + { 0x2000, "Invalid command operation code" }, + + { 0x2100, "Logical block address out of range" }, + + { 0x2400, "Invalid field in command packet" }, + + { 0x2600, "Invalid field in parameter list" }, + { 0x2601, "Parameter not supported" }, + { 0x2602, "Parameter value invalid" }, + { 0x2603, "Threshold parameters not supported" }, + + { 0x2800, "Not ready to ready transition, medium may have changed" }, + + { 0x2900, "Power on, reset or bus device reset occurred" }, + + { 0x2a00, "Parameters changed" }, + { 0x2a01, "Mode parameters changed" }, + + { 0x3000, "Incompatible medium installed" }, + { 0x3001, "Cannot read medium - unknown format" }, + { 0x3002, "Cannot read medium - incompatible format" }, + + { 0x3700, "Rounded parameter" }, + + { 0x3900, "Saving parameters not supported" }, + + { 0x3a00, "Medium not present" }, + + { 0x3f00, "ATAPI CD-ROM drive operating conditions have changed" }, + { 0x3f01, "Microcode has been changed" }, + { 0x3f02, "Changed operating definition" }, + { 0x3f03, "Inquiry data has changed" }, + + { 0x4000, "Diagnostic failure on component (ASCQ)" }, + + { 0x4400, "Internal ATAPI CD-ROM drive failure" }, + + { 0x4e00, "Overlapped commands attempted" }, + + { 0x5300, "Media load or eject failed" }, + { 0x5302, "Medium removal prevented" }, + + { 0x5700, "Unable to recover table of contents" }, + + { 0x5a00, "Operator request or state change input (unspecified)" }, + { 0x5a01, "Operator medium removal request" }, + + { 0x5b00, "Threshold condition met" }, + + { 0x5c00, "Status change" }, + + { 0x6300, "End of user area encountered on this track" }, + + { 0x6400, "Illegal mode for this track" }, + + { 0xbf00, "Loss of streaming" }, +}; +#endif + + + +/**************************************************************************** + * Generic packet command support and error handling routines. + */ + + +static +void cdrom_analyze_sense_data (ide_drive_t *drive, + struct atapi_request_sense *reqbuf, + struct packet_command *failed_command) +{ + /* Don't print not ready or unit attention errors for READ_SUBCHANNEL. + Workman (and probably other programs) uses this command to poll + the drive, and we don't want to fill the syslog + with useless errors. */ + if (failed_command && + failed_command->c[0] == SCMD_READ_SUBCHANNEL && + (reqbuf->sense_key == NOT_READY || + reqbuf->sense_key == UNIT_ATTENTION)) + return; + +#if VERBOSE_IDE_CD_ERRORS + { + int i; + char *s; + char buf[80]; + + printk ("ATAPI device %s:\n", drive->name); + + printk (" Error code: 0x%02x\n", reqbuf->error_code); + + if (reqbuf->sense_key >= 0 && + reqbuf->sense_key < ARY_LEN (sense_key_texts)) + s = sense_key_texts[reqbuf->sense_key]; + else + s = "(bad sense key)"; + + printk (" Sense key: 0x%02x - %s\n", reqbuf->sense_key, s); + + if (reqbuf->asc == 0x40) { + sprintf (buf, "Diagnostic failure on component 0x%02x", + reqbuf->ascq); + s = buf; + } else { + int lo, hi; + int key = (reqbuf->asc << 8); + if ( ! (reqbuf->ascq >= 0x80 && reqbuf->ascq <= 0xdd) ) + key |= reqbuf->ascq; + + lo = 0; + hi = ARY_LEN (sense_data_texts); + s = NULL; + + while (hi > lo) { + int mid = (lo + hi) / 2; + if (sense_data_texts[mid].asc_ascq == key) { + s = sense_data_texts[mid].text; + break; + } + else if (sense_data_texts[mid].asc_ascq > key) + hi = mid; + else + lo = mid+1; + } + } + + if (s == NULL) { + if (reqbuf->asc > 0x80) + s = "(vendor-specific error)"; + else + s = "(reserved error code)"; + } + + printk (" Additional sense data: 0x%02x, 0x%02x - %s\n", + reqbuf->asc, reqbuf->ascq, s); + + if (failed_command != NULL) { + printk (" Failed packet command: "); + for (i=0; i<sizeof (failed_command->c); i++) + printk ("%02x ", failed_command->c[i]); + printk ("\n"); + } + + if (reqbuf->sense_key == ILLEGAL_REQUEST && + (reqbuf->sense_key_specific[0] & 0x80) != 0) { + printk (" Error in %s byte %d", + (reqbuf->sense_key_specific[0] & 0x40) != 0 + ? "command packet" + : "command data", + (reqbuf->sense_key_specific[1] << 8) + + reqbuf->sense_key_specific[2]); + + if ((reqbuf->sense_key_specific[0] & 0x40) != 0) { + printk (" bit %d", + reqbuf->sense_key_specific[0] & 0x07); + } + + printk ("\n"); + } + } + +#else /* not VERBOSE_IDE_CD_ERRORS */ + + /* Suppress printing unit attention and `in progress of becoming ready' + errors when we're not being verbose. */ + + if (reqbuf->sense_key == UNIT_ATTENTION || + (reqbuf->sense_key == NOT_READY && (reqbuf->asc == 4 || + reqbuf->asc == 0x3a))) + return; + + printk ("%s: code: 0x%02x key: 0x%02x asc: 0x%02x ascq: 0x%02x\n", + drive->name, + reqbuf->error_code, reqbuf->sense_key, + reqbuf->asc, reqbuf->ascq); +#endif /* not VERBOSE_IDE_CD_ERRORS */ +} + + +/* Fix up a possibly partially-processed request so that we can + start it over entirely, or even put it back on the request queue. */ +static void restore_request (struct request *rq) +{ + if (rq->buffer != rq->bh->b_data) { + int n = (rq->buffer - rq->bh->b_data) / SECTOR_SIZE; + rq->buffer = rq->bh->b_data; + rq->nr_sectors += n; + rq->sector -= n; + } + rq->current_nr_sectors = rq->bh->b_size >> SECTOR_BITS; +} + + +static void cdrom_queue_request_sense (ide_drive_t *drive, + struct semaphore *sem, + struct atapi_request_sense *reqbuf, + struct packet_command *failed_command) +{ + struct request *rq; + struct packet_command *pc; + int len; + + /* If the request didn't explicitly specify where + to put the sense data, use the statically allocated structure. */ + if (reqbuf == NULL) + reqbuf = &drive->cdrom_info.sense_data; + + /* Make up a new request to retrieve sense information. */ + + pc = &HWIF(drive)->request_sense_pc; + memset (pc, 0, sizeof (*pc)); + + /* The request_sense structure has an odd number of (16-bit) words, + which won't work well with 32-bit transfers. However, we don't care + about the last two bytes, so just truncate the structure down + to an even length. */ + len = sizeof (*reqbuf) / 4; + len *= 4; + + pc->c[0] = REQUEST_SENSE; + pc->c[4] = len; + pc->buffer = (char *)reqbuf; + pc->buflen = len; + pc->sense_data = (struct atapi_request_sense *)failed_command; + + /* stuff the sense request in front of our current request */ + + rq = &HWIF(drive)->request_sense_request; + ide_init_drive_cmd (rq); + rq->cmd = REQUEST_SENSE_COMMAND; + rq->buffer = (char *)pc; + rq->sem = sem; + (void) ide_do_drive_cmd (drive, rq, ide_preempt); +} + + +static void cdrom_end_request (int uptodate, ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + + if (rq->cmd == REQUEST_SENSE_COMMAND && uptodate) { + struct packet_command *pc = (struct packet_command *) + rq->buffer; + cdrom_analyze_sense_data (drive, + (struct atapi_request_sense *) + (pc->buffer - pc->c[4]), + (struct packet_command *) + pc->sense_data); + } + + ide_end_request (uptodate, HWGROUP(drive)); +} + + +/* Mark that we've seen a media change, and invalidate our internal + buffers. */ +static void cdrom_saw_media_change (ide_drive_t *drive) +{ + CDROM_STATE_FLAGS (drive)->media_changed = 1; + CDROM_STATE_FLAGS (drive)->toc_valid = 0; + drive->cdrom_info.nsectors_buffered = 0; +} + + +/* Returns 0 if the request should be continued. + Returns 1 if the request was ended. */ +static int cdrom_decode_status (ide_drive_t *drive, int good_stat, + int *stat_ret) +{ + struct request *rq = HWGROUP(drive)->rq; + int stat, err, sense_key, cmd; + + /* Check for errors. */ + stat = GET_STAT(); + *stat_ret = stat; + + if (OK_STAT (stat, good_stat, BAD_R_STAT)) + return 0; + + /* Got an error. */ + err = IN_BYTE (IDE_ERROR_REG); + sense_key = err >> 4; + + if (rq == NULL) + printk ("%s : missing request in cdrom_decode_status\n", + drive->name); + else { + cmd = rq->cmd; + + if (cmd == REQUEST_SENSE_COMMAND) { + /* We got an error trying to get sense info + from the drive (probably while trying + to recover from a former error). Just give up. */ + + struct packet_command *pc = (struct packet_command *) + rq->buffer; + pc->stat = 1; + cdrom_end_request (1, drive); + ide_error (drive, "request sense failure", stat); + return 1; + + } else if (cmd == PACKET_COMMAND) { + /* All other functions, except for READ. */ + + struct packet_command *pc = (struct packet_command *) + rq->buffer; + struct semaphore *sem = NULL; + + /* Check for tray open. */ + if (sense_key == NOT_READY) { + cdrom_saw_media_change (drive); + + /* Print an error message to the syslog. + Exception: don't print anything if this + is a read subchannel command. This is + because workman constantly polls the drive + with this command, and we don't want + to uselessly fill up the syslog. */ + if (pc->c[0] != SCMD_READ_SUBCHANNEL) + printk ("%s : tray open or drive not ready\n", + drive->name); + } else if (sense_key == UNIT_ATTENTION) { + /* Check for media change. */ + cdrom_saw_media_change (drive); + printk ("%s: media changed\n", drive->name); + } else { + /* Otherwise, print an error. */ + ide_dump_status (drive, "packet command error", + stat); + } + + /* Set the error flag and complete the request. + Then, if we have a CHECK CONDITION status, + queue a request sense command. We must be careful, + though: we don't want the thread in + cdrom_queue_packet_command to wake up until + the request sense has completed. We do this + by transferring the semaphore from the packet + command request to the request sense request. */ + + if ((stat & ERR_STAT) != 0) { + sem = rq->sem; + rq->sem = NULL; + } + + pc->stat = 1; + cdrom_end_request (1, drive); + + if ((stat & ERR_STAT) != 0) + cdrom_queue_request_sense (drive, sem, + pc->sense_data, pc); + } else { + /* Handle errors from READ requests. */ + + if (sense_key == NOT_READY) { + /* Tray open. */ + cdrom_saw_media_change (drive); + + /* Fail the request. */ + printk ("%s : tray open\n", drive->name); + cdrom_end_request (0, drive); + } else if (sense_key == UNIT_ATTENTION) { + /* Media change. */ + cdrom_saw_media_change (drive); + + /* Arrange to retry the request. + But be sure to give up if we've retried + too many times. */ + if (++rq->errors > ERROR_MAX) + cdrom_end_request (0, drive); + } else if (sense_key == ILLEGAL_REQUEST || + sense_key == DATA_PROTECT) { + /* No point in retrying after an illegal + request or data protect error.*/ + ide_dump_status (drive, "command error", stat); + cdrom_end_request (0, drive); + } else if ((err & ~ABRT_ERR) != 0) { + /* Go to the default handler + for other errors. */ + ide_error (drive, "cdrom_decode_status", stat); + return 1; + } else if ((++rq->errors > ERROR_MAX)) { + /* We've racked up too many retries. Abort. */ + cdrom_end_request (0, drive); + } + + /* If we got a CHECK_CONDITION status, + queue a request sense command. */ + if ((stat & ERR_STAT) != 0) + cdrom_queue_request_sense (drive, + NULL, NULL, NULL); + } + } + + /* Retry, or handle the next request. */ + return 1; +} + + +/* Set up the device registers for transferring a packet command on DEV, + expecting to later transfer XFERLEN bytes. HANDLER is the routine + which actually transfers the command to the drive. If this is a + drq_interrupt device, this routine will arrange for HANDLER to be + called when the interrupt from the drive arrives. Otherwise, HANDLER + will be called immediately after the drive is prepared for the transfer. */ + +static int cdrom_start_packet_command (ide_drive_t *drive, int xferlen, + ide_handler_t *handler) +{ + /* Wait for the controller to be idle. */ + if (ide_wait_stat (drive, 0, BUSY_STAT, WAIT_READY)) return 1; + + /* Set up the controller registers. */ + OUT_BYTE (0, IDE_FEATURE_REG); + OUT_BYTE (0, IDE_NSECTOR_REG); + OUT_BYTE (0, IDE_SECTOR_REG); + + OUT_BYTE (xferlen & 0xff, IDE_LCYL_REG); + OUT_BYTE (xferlen >> 8 , IDE_HCYL_REG); + OUT_BYTE (drive->ctl, IDE_CONTROL_REG); + + if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) { + ide_set_handler (drive, handler, WAIT_CMD); + OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* packet command */ + } else { + OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* packet command */ + (*handler) (drive); + } + + return 0; +} + + +/* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. + The device registers must have already been prepared + by cdrom_start_packet_command. + HANDLER is the interrupt handler to call when the command completes + or there's data ready. */ +static int cdrom_transfer_packet_command (ide_drive_t *drive, + char *cmd_buf, int cmd_len, + ide_handler_t *handler) +{ + if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) { + /* Here we should have been called after receiving an interrupt + from the device. DRQ should how be set. */ + int stat_dum; + + /* Check for errors. */ + if (cdrom_decode_status (drive, DRQ_STAT, &stat_dum)) return 1; + } else { + /* Otherwise, we must wait for DRQ to get set. */ + if (ide_wait_stat (drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) + return 1; + } + + /* Arm the interrupt handler. */ + ide_set_handler (drive, handler, WAIT_CMD); + + /* Send the command to the device. */ + cdrom_out_bytes (drive, cmd_buf, cmd_len); + + return 0; +} + + + +/**************************************************************************** + * Block read functions. + */ + +/* + * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector + * buffer. Once the first sector is added, any subsequent sectors are + * assumed to be continuous (until the buffer is cleared). For the first + * sector added, SECTOR is its sector number. (SECTOR is then ignored until + * the buffer is cleared.) + */ +static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector, + int sectors_to_transfer) +{ + struct cdrom_info *info = &drive->cdrom_info; + + /* Number of sectors to read into the buffer. */ + int sectors_to_buffer = MIN (sectors_to_transfer, + (SECTOR_BUFFER_SIZE >> SECTOR_BITS) - + info->nsectors_buffered); + + char *dest; + + /* If we don't yet have a sector buffer, try to allocate one. + If we can't get one atomically, it's not fatal -- we'll just throw + the data away rather than caching it. */ + if (info->sector_buffer == NULL) { + info->sector_buffer = (char *) kmalloc (SECTOR_BUFFER_SIZE, + GFP_ATOMIC); + + /* If we couldn't get a buffer, + don't try to buffer anything... */ + if (info->sector_buffer == NULL) + sectors_to_buffer = 0; + } + + /* If this is the first sector in the buffer, remember its number. */ + if (info->nsectors_buffered == 0) + info->sector_buffered = sector; + + /* Read the data into the buffer. */ + dest = info->sector_buffer + info->nsectors_buffered * SECTOR_SIZE; + while (sectors_to_buffer > 0) { + cdrom_in_bytes (drive, dest, SECTOR_SIZE); + --sectors_to_buffer; + --sectors_to_transfer; + ++info->nsectors_buffered; + dest += SECTOR_SIZE; + } + + /* Throw away any remaining data. */ + while (sectors_to_transfer > 0) { + char dum[SECTOR_SIZE]; + cdrom_in_bytes (drive, dum, sizeof (dum)); + --sectors_to_transfer; + } +} + + +/* + * Check the contents of the interrupt reason register from the cdrom + * and attempt to recover if there are problems. Returns 0 if everything's + * ok; nonzero if the request has been terminated. + */ +static inline +int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason) +{ + ireason &= 3; + if (ireason == 2) return 0; + + if (ireason == 0) { + /* Whoops... The drive is expecting to receive data from us! */ + printk ("%s: cdrom_read_intr: " + "Drive wants to transfer data the wrong way!\n", + drive->name); + + /* Throw some data at the drive so it doesn't hang + and quit this request. */ + while (len > 0) { + int dum = 0; + cdrom_out_bytes (drive, &dum, sizeof (dum)); + len -= sizeof (dum); + } + } else { + /* Drive wants a command packet, or invalid ireason... */ + printk ("%s: cdrom_read_intr: bad interrupt reason %d\n", + drive->name, ireason); + } + + cdrom_end_request (0, drive); + return -1; +} + + +/* + * Interrupt routine. Called when a read request has completed. + */ +static void cdrom_read_intr (ide_drive_t *drive) +{ + int stat; + int ireason, len, sectors_to_transfer, nskip; + + struct request *rq = HWGROUP(drive)->rq; + + /* Check for errors. */ + if (cdrom_decode_status (drive, 0, &stat)) return; + + /* Read the interrupt reason and the transfer length. */ + ireason = IN_BYTE (IDE_NSECTOR_REG); + len = IN_BYTE (IDE_LCYL_REG) + 256 * IN_BYTE (IDE_HCYL_REG); + + /* If DRQ is clear, the command has completed. */ + if ((stat & DRQ_STAT) == 0) { + /* If we're not done filling the current buffer, complain. + Otherwise, complete the command normally. */ + if (rq->current_nr_sectors > 0) { + printk ("%s: cdrom_read_intr: data underrun (%ld blocks)\n", + drive->name, rq->current_nr_sectors); + cdrom_end_request (0, drive); + } else + cdrom_end_request (1, drive); + + return; + } + + /* Check that the drive is expecting to do the same thing we are. */ + if (cdrom_read_check_ireason (drive, len, ireason)) return; + + /* Assume that the drive will always provide data in multiples + of at least SECTOR_SIZE, as it gets hairy to keep track + of the transfers otherwise. */ + if ((len % SECTOR_SIZE) != 0) { + printk ("%s: cdrom_read_intr: Bad transfer size %d\n", + drive->name, len); + printk (" This drive is not supported by this version of the driver\n"); + cdrom_end_request (0, drive); + return; + } + + /* The number of sectors we need to read from the drive. */ + sectors_to_transfer = len / SECTOR_SIZE; + + /* First, figure out if we need to bit-bucket + any of the leading sectors. */ + nskip = MIN ((int)(rq->current_nr_sectors - + (rq->bh->b_size >> SECTOR_BITS)), + sectors_to_transfer); + + while (nskip > 0) { + /* We need to throw away a sector. */ + char dum[SECTOR_SIZE]; + cdrom_in_bytes (drive, dum, sizeof (dum)); + + --rq->current_nr_sectors; + --nskip; + --sectors_to_transfer; + } + + /* Now loop while we still have data to read from the drive. */ + while (sectors_to_transfer > 0) { + int this_transfer; + + /* If we've filled the present buffer but there's another + chained buffer after it, move on. */ + if (rq->current_nr_sectors == 0 && + rq->nr_sectors > 0) + cdrom_end_request (1, drive); + + /* If the buffers are full, cache the rest of the data in our + internal buffer. */ + if (rq->current_nr_sectors == 0) { + cdrom_buffer_sectors (drive, + rq->sector, sectors_to_transfer); + sectors_to_transfer = 0; + } else { + /* Transfer data to the buffers. + Figure out how many sectors we can transfer + to the current buffer. */ + this_transfer = MIN (sectors_to_transfer, + rq->current_nr_sectors); + + /* Read this_transfer sectors + into the current buffer. */ + while (this_transfer > 0) { + cdrom_in_bytes (drive + , rq->buffer, SECTOR_SIZE); + rq->buffer += SECTOR_SIZE; + --rq->nr_sectors; + --rq->current_nr_sectors; + ++rq->sector; + --this_transfer; + --sectors_to_transfer; + } + } + } + + /* Done moving data! + Wait for another interrupt. */ + ide_set_handler (drive, &cdrom_read_intr, WAIT_CMD); +} + + +/* + * Try to satisfy some of the current read request from our cached data. + * Returns nonzero if the request has been completed, zero otherwise. + */ +static int cdrom_read_from_buffer (ide_drive_t *drive) +{ + struct cdrom_info *info = &drive->cdrom_info; + struct request *rq = HWGROUP(drive)->rq; + + /* Can't do anything if there's no buffer. */ + if (info->sector_buffer == NULL) return 0; + + /* Loop while this request needs data and the next block is present + in our cache. */ + while (rq->nr_sectors > 0 && + rq->sector >= info->sector_buffered && + rq->sector < info->sector_buffered + info->nsectors_buffered) { + if (rq->current_nr_sectors == 0) + cdrom_end_request (1, drive); + + memcpy (rq->buffer, + info->sector_buffer + + (rq->sector - info->sector_buffered) * SECTOR_SIZE, + SECTOR_SIZE); + rq->buffer += SECTOR_SIZE; + --rq->current_nr_sectors; + --rq->nr_sectors; + ++rq->sector; + } + + /* If we've satisfied the current request, + terminate it successfully. */ + if (rq->nr_sectors == 0) { + cdrom_end_request (1, drive); + return -1; + } + + /* Move on to the next buffer if needed. */ + if (rq->current_nr_sectors == 0) + cdrom_end_request (1, drive); + + /* If this condition does not hold, then the kluge i use to + represent the number of sectors to skip at the start of a transfer + will fail. I think that this will never happen, but let's be + paranoid and check. */ + if (rq->current_nr_sectors < (rq->bh->b_size >> SECTOR_BITS) && + (rq->sector % SECTORS_PER_FRAME) != 0) { + printk ("%s: cdrom_read_from_buffer: buffer botch (%ld)\n", + drive->name, rq->sector); + cdrom_end_request (0, drive); + return -1; + } + + return 0; +} + + + +/* + * Routine to send a read packet command to the drive. + * This is usually called directly from cdrom_start_read. + * However, for drq_interrupt devices, it is called from an interrupt + * when the drive is ready to accept the command. + */ +static void cdrom_start_read_continuation (ide_drive_t *drive) +{ + struct packet_command pc; + struct request *rq = HWGROUP(drive)->rq; + + int nsect, sector, nframes, frame, nskip; + + /* Number of sectors to transfer. */ + nsect = rq->nr_sectors; + +#if !STANDARD_ATAPI + if (nsect > drive->cdrom_info.max_sectors) + nsect = drive->cdrom_info.max_sectors; +#endif /* not STANDARD_ATAPI */ + + /* Starting sector. */ + sector = rq->sector; + + /* If the requested sector doesn't start on a cdrom block boundary, + we must adjust the start of the transfer so that it does, + and remember to skip the first few sectors. + If the CURRENT_NR_SECTORS field is larger than the size + of the buffer, it will mean that we're to skip a number + of sectors equal to the amount by which CURRENT_NR_SECTORS + is larger than the buffer size. */ + nskip = (sector % SECTORS_PER_FRAME); + if (nskip > 0) { + /* Sanity check... */ + if (rq->current_nr_sectors != + (rq->bh->b_size >> SECTOR_BITS)) { + printk ("%s: cdrom_start_read_continuation: buffer botch (%ld)\n", + drive->name, rq->current_nr_sectors); + cdrom_end_request (0, drive); + return; + } + + sector -= nskip; + nsect += nskip; + rq->current_nr_sectors += nskip; + } + + /* Convert from sectors to cdrom blocks, rounding up the transfer + length if needed. */ + nframes = (nsect + SECTORS_PER_FRAME-1) / SECTORS_PER_FRAME; + frame = sector / SECTORS_PER_FRAME; + + /* Largest number of frames was can transfer at once is 64k-1. */ + nframes = MIN (nframes, 65535); + + /* Set up the command */ + memset (&pc.c, 0, sizeof (pc.c)); + pc.c[0] = READ_10; + pc.c[7] = (nframes >> 8); + pc.c[8] = (nframes & 0xff); + put_unaligned(htonl (frame), (unsigned int *) &pc.c[2]); + + /* Send the command to the drive and return. */ + (void) cdrom_transfer_packet_command (drive, pc.c, sizeof (pc.c), + &cdrom_read_intr); +} + + +/* + * Start a read request from the CD-ROM. + */ +static void cdrom_start_read (ide_drive_t *drive, unsigned int block) +{ + struct request *rq = HWGROUP(drive)->rq; + int minor = MINOR (rq->rq_dev); + + /* If the request is relative to a partition, fix it up to refer to the + absolute address. */ + if ((minor & PARTN_MASK) != 0) { + rq->sector = block; + minor &= ~PARTN_MASK; + rq->rq_dev = MKDEV (MAJOR(rq->rq_dev), minor); + } + + /* We may be retrying this request after an error. Fix up + any weirdness which might be present in the request packet. */ + restore_request (rq); + + /* Satisfy whatever we can of this request from our cached sector. */ + if (cdrom_read_from_buffer (drive)) + return; + + /* Clear the local sector buffer. */ + drive->cdrom_info.nsectors_buffered = 0; + + /* Start sending the read request to the drive. */ + cdrom_start_packet_command (drive, 32768, + cdrom_start_read_continuation); +} + + + + +/**************************************************************************** + * Execute all other packet commands. + */ + +/* Forward declarations. */ +static int +cdrom_lockdoor (ide_drive_t *drive, int lockflag, + struct atapi_request_sense *reqbuf); + + + +/* Interrupt routine for packet command completion. */ +static void cdrom_pc_intr (ide_drive_t *drive) +{ + int ireason, len, stat, thislen; + struct request *rq = HWGROUP(drive)->rq; + struct packet_command *pc = (struct packet_command *)rq->buffer; + + /* Check for errors. */ + if (cdrom_decode_status (drive, 0, &stat)) return; + + /* Read the interrupt reason and the transfer length. */ + ireason = IN_BYTE (IDE_NSECTOR_REG); + len = IN_BYTE (IDE_LCYL_REG) + 256 * IN_BYTE (IDE_HCYL_REG); + + /* If DRQ is clear, the command has completed. + Complain if we still have data left to transfer. */ + if ((stat & DRQ_STAT) == 0) { + /* Some of the trailing request sense fields are optional, and + some drives don't send them. Sigh. */ + if (pc->c[0] == REQUEST_SENSE && + pc->buflen > 0 && + pc->buflen <= 5) { + while (pc->buflen > 0) { + *pc->buffer++ = 0; + --pc->buflen; + } + } + + if (pc->buflen == 0) + cdrom_end_request (1, drive); + else { + printk ("%s: cdrom_pc_intr: data underrun %d\n", + drive->name, pc->buflen); + pc->stat = 1; + cdrom_end_request (1, drive); + } + return; + } + + /* Figure out how much data to transfer. */ + thislen = pc->buflen; + if (thislen < 0) thislen = -thislen; + if (thislen > len) thislen = len; + + /* The drive wants to be written to. */ + if ((ireason & 3) == 0) { + /* Check that we want to write. */ + if (pc->buflen > 0) { + printk ("%s: cdrom_pc_intr: Drive wants " + "to transfer data the wrong way!\n", + drive->name); + pc->stat = 1; + thislen = 0; + } + + /* Transfer the data. */ + cdrom_out_bytes (drive, pc->buffer, thislen); + + /* If we haven't moved enough data to satisfy the drive, + add some padding. */ + while (len > thislen) { + int dum = 0; + cdrom_out_bytes (drive, &dum, sizeof (dum)); + len -= sizeof (dum); + } + + /* Keep count of how much data we've moved. */ + pc->buffer += thislen; + pc->buflen += thislen; + } + + /* Same drill for reading. */ + else if ((ireason & 3) == 2) { + /* Check that we want to read. */ + if (pc->buflen < 0) { + printk ("%s: cdrom_pc_intr: Drive wants to " + "transfer data the wrong way!\n", + drive->name); + pc->stat = 1; + thislen = 0; + } + + /* Transfer the data. */ + cdrom_in_bytes (drive, pc->buffer, thislen); + + /* If we haven't moved enough data to satisfy the drive, + add some padding. */ + while (len > thislen) { + int dum = 0; + cdrom_in_bytes (drive, &dum, sizeof (dum)); + len -= sizeof (dum); + } + + /* Keep count of how much data we've moved. */ + pc->buffer += thislen; + pc->buflen -= thislen; + } else { + printk ("%s: cdrom_pc_intr: The drive " + "appears confused (ireason = 0x%2x)\n", + drive->name, ireason); + pc->stat = 1; + } + + /* Now we wait for another interrupt. */ + ide_set_handler (drive, &cdrom_pc_intr, WAIT_CMD); +} + + +static void cdrom_do_pc_continuation (ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + struct packet_command *pc = (struct packet_command *)rq->buffer; + + /* Send the command to the drive and return. */ + cdrom_transfer_packet_command (drive, pc->c, + sizeof (pc->c), &cdrom_pc_intr); +} + + +static void cdrom_do_packet_command (ide_drive_t *drive) +{ + int len; + struct request *rq = HWGROUP(drive)->rq; + struct packet_command *pc = (struct packet_command *)rq->buffer; + + len = pc->buflen; + if (len < 0) len = -len; + + pc->stat = 0; + + /* Start sending the command to the drive. */ + cdrom_start_packet_command (drive, len, cdrom_do_pc_continuation); +} + + +/* Sleep for TIME jiffies. + Not to be called from an interrupt handler. */ +static +void cdrom_sleep (int time) +{ + current->state = TASK_INTERRUPTIBLE; + current->timeout = jiffies + time; + schedule (); +} + +static +int cdrom_queue_packet_command (ide_drive_t *drive, struct packet_command *pc) +{ + struct atapi_request_sense my_reqbuf; + int retries = 10; + struct request req; + + /* If our caller has not provided a place to stick any sense data, + use our own area. */ + if (pc->sense_data == NULL) + pc->sense_data = &my_reqbuf; + pc->sense_data->sense_key = 0; + + /* Start of retry loop. */ + do { + ide_init_drive_cmd (&req); + req.cmd = PACKET_COMMAND; + req.buffer = (char *)pc; + (void) ide_do_drive_cmd (drive, &req, ide_wait); + + if (pc->stat != 0) { + /* The request failed. Retry if it was due to a unit + attention status + (usually means media was changed). */ + struct atapi_request_sense *reqbuf = pc->sense_data; + + if (reqbuf->sense_key == UNIT_ATTENTION) + ; + else if (reqbuf->sense_key == NOT_READY && + reqbuf->asc == 4) { + /* The drive is in the process of loading + a disk. Retry, but wait a little to give + the drive time to complete the load. */ + cdrom_sleep (HZ); + } else + /* Otherwise, don't retry. */ + retries = 0; + + --retries; + } + + /* End of retry loop. */ + } while (pc->stat != 0 && retries >= 0); + + + /* Return an error if the command failed. */ + if (pc->stat != 0) + return -EIO; + else { + /* The command succeeded. If it was anything other than + a request sense, eject, or door lock command, + and we think that the door is presently, lock it again. + (The door was probably unlocked via an explicit + CDROMEJECT ioctl.) */ + if (CDROM_STATE_FLAGS (drive)->door_locked == 0 && + (pc->c[0] != REQUEST_SENSE && + pc->c[0] != ALLOW_MEDIUM_REMOVAL && + pc->c[0] != START_STOP)) { + (void) cdrom_lockdoor (drive, 1, NULL); + } + return 0; + } +} + + +/**************************************************************************** + * cdrom driver request routine. + */ + +void ide_do_rw_cdrom (ide_drive_t *drive, unsigned long block) +{ + struct request *rq = HWGROUP(drive)->rq; + + if (rq -> cmd == PACKET_COMMAND || rq -> cmd == REQUEST_SENSE_COMMAND) + cdrom_do_packet_command (drive); + else if (rq -> cmd == RESET_DRIVE_COMMAND) { + cdrom_end_request (1, drive); + ide_do_reset (drive); + return; + } else if (rq -> cmd != READ) { + printk ("ide-cd: bad cmd %d\n", rq -> cmd); + cdrom_end_request (0, drive); + } else + cdrom_start_read (drive, block); +} + + + +/**************************************************************************** + * Ioctl handling. + * + * Routines which queue packet commands take as a final argument a pointer + * to an atapi_request_sense struct. If execution of the command results + * in an error with a CHECK CONDITION status, this structure will be filled + * with the results of the subsequent request sense command. The pointer + * can also be NULL, in which case no sense information is returned. + */ + +#if ! STANDARD_ATAPI +static inline +int bin2bcd (int x) +{ + return (x%10) | ((x/10) << 4); +} + + +static inline +int bcd2bin (int x) +{ + return (x >> 4) * 10 + (x & 0x0f); +} + +static +void msf_from_bcd (struct atapi_msf *msf) +{ + msf->minute = bcd2bin (msf->minute); + msf->second = bcd2bin (msf->second); + msf->frame = bcd2bin (msf->frame); +} + +#endif /* not STANDARD_ATAPI */ + + +static inline +void lba_to_msf (int lba, byte *m, byte *s, byte *f) +{ + lba += CD_BLOCK_OFFSET; + lba &= 0xffffff; /* negative lbas use only 24 bits */ + *m = lba / (CD_SECS * CD_FRAMES); + lba %= (CD_SECS * CD_FRAMES); + *s = lba / CD_FRAMES; + *f = lba % CD_FRAMES; +} + + +static inline +int msf_to_lba (byte m, byte s, byte f) +{ + return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_BLOCK_OFFSET; +} + + +static int +cdrom_check_status (ide_drive_t *drive, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + + pc.sense_data = reqbuf; + pc.c[0] = TEST_UNIT_READY; + + /* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to + switch CDs instead of supporting the LOAD_UNLOAD opcode */ + + pc.c[7] = CDROM_STATE_FLAGS (drive)->sanyo_slot % 3; + + return cdrom_queue_packet_command (drive, &pc); +} + + +/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */ +static int +cdrom_lockdoor (ide_drive_t *drive, int lockflag, + struct atapi_request_sense *reqbuf) +{ + struct atapi_request_sense my_reqbuf; + int stat; + struct packet_command pc; + + if (reqbuf == NULL) + reqbuf = &my_reqbuf; + + /* If the drive cannot lock the door, just pretend. */ + if (CDROM_CONFIG_FLAGS (drive)->no_doorlock) + stat = 0; + else { + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = ALLOW_MEDIUM_REMOVAL; + pc.c[4] = (lockflag != 0); + stat = cdrom_queue_packet_command (drive, &pc); + } + + if (stat == 0) + CDROM_STATE_FLAGS (drive)->door_locked = lockflag; + else { + /* If we got an illegal field error, the drive + probably cannot lock the door. */ + if (reqbuf->sense_key == ILLEGAL_REQUEST && + (reqbuf->asc == 0x24 || reqbuf->asc == 0x20)) { + printk ("%s: door locking not supported\n", + drive->name); + CDROM_CONFIG_FLAGS (drive)->no_doorlock = 1; + stat = 0; + CDROM_STATE_FLAGS (drive)->door_locked = lockflag; + } + } + return stat; +} + + +/* Eject the disk if EJECTFLAG is 0. + If EJECTFLAG is 1, try to reload the disk. */ +static int +cdrom_eject (ide_drive_t *drive, int ejectflag, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = START_STOP; + pc.c[4] = 2 + (ejectflag != 0); + return cdrom_queue_packet_command (drive, &pc); +} + + +static int +cdrom_pause (ide_drive_t *drive, int pauseflag, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = SCMD_PAUSE_RESUME; + pc.c[8] = !pauseflag; + return cdrom_queue_packet_command (drive, &pc); +} + + +static int +cdrom_startstop (ide_drive_t *drive, int startflag, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = START_STOP; + pc.c[1] = 1; + pc.c[4] = startflag; + return cdrom_queue_packet_command (drive, &pc); +} + + +static int +cdrom_read_capacity (ide_drive_t *drive, unsigned *capacity, + struct atapi_request_sense *reqbuf) +{ + struct { + unsigned lba; + unsigned blocklen; + } capbuf; + + int stat; + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = READ_CAPACITY; + pc.buffer = (char *)&capbuf; + pc.buflen = sizeof (capbuf); + + stat = cdrom_queue_packet_command (drive, &pc); + if (stat == 0) + *capacity = ntohl (capbuf.lba); + + return stat; +} + + +static int +cdrom_read_tocentry (ide_drive_t *drive, int trackno, int msf_flag, + int format, char *buf, int buflen, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.buffer = buf; + pc.buflen = buflen; + pc.c[0] = SCMD_READ_TOC; + pc.c[6] = trackno; + pc.c[7] = (buflen >> 8); + pc.c[8] = (buflen & 0xff); + pc.c[9] = (format << 6); + if (msf_flag) pc.c[1] = 2; + return cdrom_queue_packet_command (drive, &pc); +} + + +/* Try to read the entire TOC for the disk into our internal buffer. */ +static int +cdrom_read_toc (ide_drive_t *drive, + struct atapi_request_sense *reqbuf) +{ + int stat, ntracks, i; + struct atapi_toc *toc = drive->cdrom_info.toc; + struct { + struct atapi_toc_header hdr; + struct atapi_toc_entry ent; + } ms_tmp; + + if (toc == NULL) { + /* Try to allocate space. */ + toc = (struct atapi_toc *) kmalloc (sizeof (struct atapi_toc), + GFP_KERNEL); + drive->cdrom_info.toc = toc; + } + + if (toc == NULL) { + printk ("%s: No cdrom TOC buffer!\n", drive->name); + return -EIO; + } + + /* Check to see if the existing data is still valid. + If it is, just return. */ + if (CDROM_STATE_FLAGS (drive)->toc_valid) + (void) cdrom_check_status (drive, NULL); + + if (CDROM_STATE_FLAGS (drive)->toc_valid) return 0; + + /* First read just the header, so we know how long the TOC is. */ + stat = cdrom_read_tocentry (drive, 0, 1, 0, (char *)&toc->hdr, + sizeof (struct atapi_toc_header) + + sizeof (struct atapi_toc_entry), + reqbuf); + if (stat) return stat; + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->toctracks_as_bcd) { + toc->hdr.first_track = bcd2bin (toc->hdr.first_track); + toc->hdr.last_track = bcd2bin (toc->hdr.last_track); + } +#endif /* not STANDARD_ATAPI */ + + ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; + if (ntracks <= 0) return -EIO; + if (ntracks > MAX_TRACKS) ntracks = MAX_TRACKS; + + /* Now read the whole schmeer. */ + stat = cdrom_read_tocentry (drive, 0, 1, 0, (char *)&toc->hdr, + sizeof (struct atapi_toc_header) + + (ntracks+1) * + sizeof (struct atapi_toc_entry), + reqbuf); + if (stat) return stat; + toc->hdr.toc_length = ntohs (toc->hdr.toc_length); + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->toctracks_as_bcd) { + toc->hdr.first_track = bcd2bin (toc->hdr.first_track); + toc->hdr.last_track = bcd2bin (toc->hdr.last_track); + } +#endif /* not STANDARD_ATAPI */ + + for (i=0; i<=ntracks; i++) { +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd) { + if (CDROM_CONFIG_FLAGS (drive)->toctracks_as_bcd) + toc->ent[i].track = bcd2bin (toc->ent[i].track); + msf_from_bcd (&toc->ent[i].addr.msf); + } +#endif /* not STANDARD_ATAPI */ + toc->ent[i].addr.lba = msf_to_lba (toc->ent[i].addr.msf.minute, + toc->ent[i].addr.msf.second, + toc->ent[i].addr.msf.frame); + } + + /* Read the multisession information. */ + stat = cdrom_read_tocentry (drive, 0, 1, 1, + (char *)&ms_tmp, sizeof (ms_tmp), + reqbuf); + if (stat) return stat; + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd) + msf_from_bcd (&ms_tmp.ent.addr.msf); +#endif /* not STANDARD_ATAPI */ + + toc->last_session_lba = msf_to_lba (ms_tmp.ent.addr.msf.minute, + ms_tmp.ent.addr.msf.second, + ms_tmp.ent.addr.msf.frame); + + toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); + + /* Now try to get the total cdrom capacity. */ + stat = cdrom_read_capacity (drive, &toc->capacity, reqbuf); + if (stat) toc->capacity = 0x1fffff; + + HWIF(drive)->gd->sizes[drive->select.b.unit << PARTN_BITS] + = toc->capacity * SECTORS_PER_FRAME; + drive->part[0].nr_sects = toc->capacity * SECTORS_PER_FRAME; + + /* Remember that we've read this stuff. */ + CDROM_STATE_FLAGS (drive)->toc_valid = 1; + + return 0; +} + + +static int +cdrom_read_subchannel (ide_drive_t *drive, int format, + char *buf, int buflen, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.buffer = buf; + pc.buflen = buflen; + pc.c[0] = SCMD_READ_SUBCHANNEL; + pc.c[1] = 2; /* MSF addressing */ + pc.c[2] = 0x40; /* request subQ data */ + pc.c[3] = format, + pc.c[7] = (buflen >> 8); + pc.c[8] = (buflen & 0xff); + return cdrom_queue_packet_command (drive, &pc); +} + + +/* modeflag: 0 = current, 1 = changeable mask, 2 = default, 3 = saved */ +static int +cdrom_mode_sense (ide_drive_t *drive, int pageno, int modeflag, + char *buf, int buflen, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.buffer = buf; + pc.buflen = buflen; + pc.c[0] = MODE_SENSE_10; + pc.c[2] = pageno | (modeflag << 6); + pc.c[7] = (buflen >> 8); + pc.c[8] = (buflen & 0xff); + return cdrom_queue_packet_command (drive, &pc); +} + + +static int +cdrom_mode_select (ide_drive_t *drive, int pageno, char *buf, int buflen, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.buffer = buf; + pc.buflen = - buflen; + pc.c[0] = MODE_SELECT_10; + pc.c[1] = 0x10; + pc.c[2] = pageno; + pc.c[7] = (buflen >> 8); + pc.c[8] = (buflen & 0xff); + return cdrom_queue_packet_command (drive, &pc); +} + + +static int +cdrom_play_lba_range_1 (ide_drive_t *drive, int lba_start, int lba_end, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = SCMD_PLAYAUDIO_MSF; + lba_to_msf (lba_start, &pc.c[3], &pc.c[4], &pc.c[5]); + lba_to_msf (lba_end-1, &pc.c[6], &pc.c[7], &pc.c[8]); + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->playmsf_as_bcd) { + pc.c[3] = bin2bcd (pc.c[3]); + pc.c[4] = bin2bcd (pc.c[4]); + pc.c[5] = bin2bcd (pc.c[5]); + pc.c[6] = bin2bcd (pc.c[6]); + pc.c[7] = bin2bcd (pc.c[7]); + pc.c[8] = bin2bcd (pc.c[8]); + } +#endif /* not STANDARD_ATAPI */ + + return cdrom_queue_packet_command (drive, &pc); +} + + +/* Play audio starting at LBA LBA_START and finishing with the + LBA before LBA_END. */ +static int +cdrom_play_lba_range (ide_drive_t *drive, int lba_start, int lba_end, + struct atapi_request_sense *reqbuf) +{ + int i, stat; + struct atapi_request_sense my_reqbuf; + + if (reqbuf == NULL) + reqbuf = &my_reqbuf; + + /* Some drives, will, for certain audio cds, + give an error if you ask them to play the entire cd using the + values which are returned in the TOC. The play will succeed, + however, if the ending address is adjusted downwards + by a few frames. */ + for (i=0; i<75; i++) { + stat = cdrom_play_lba_range_1 (drive, lba_start, lba_end, + reqbuf); + + if (stat == 0 || + !(reqbuf->sense_key == ILLEGAL_REQUEST && + reqbuf->asc == 0x24)) + return stat; + + --lba_end; + if (lba_end <= lba_start) break; + } + + return stat; +} + + +static +int cdrom_get_toc_entry (ide_drive_t *drive, int track, + struct atapi_toc_entry **ent, + struct atapi_request_sense *reqbuf) +{ + int stat, ntracks; + struct atapi_toc *toc; + + /* Make sure our saved TOC is valid. */ + stat = cdrom_read_toc (drive, reqbuf); + if (stat) return stat; + + toc = drive->cdrom_info.toc; + + /* Check validity of requested track number. */ + ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; + if (track == CDROM_LEADOUT) + *ent = &toc->ent[ntracks]; + else if (track < toc->hdr.first_track || + track > toc->hdr.last_track) + return -EINVAL; + else + *ent = &toc->ent[track - toc->hdr.first_track]; + + return 0; +} + + +static int +cdrom_read_block (ide_drive_t *drive, int format, int lba, int nblocks, + char *buf, int buflen, + struct atapi_request_sense *reqbuf) +{ + struct packet_command pc; + struct atapi_request_sense my_reqbuf; + int stat; + + if (reqbuf == NULL) + reqbuf = &my_reqbuf; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.buffer = buf; + pc.buflen = buflen; + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->old_readcd) + pc.c[0] = 0xd4; + else +#endif /* not STANDARD_ATAPI */ + pc.c[0] = READ_CD; + + pc.c[1] = (format << 2); + put_unaligned(htonl(lba), (unsigned int *) &pc.c[2]); + pc.c[8] = (nblocks & 0xff); + pc.c[7] = ((nblocks>>8) & 0xff); + pc.c[6] = ((nblocks>>16) & 0xff); + if (format <= 1) + pc.c[9] = 0xf8; + else + pc.c[9] = 0x10; + + stat = cdrom_queue_packet_command (drive, &pc); + +#if ! STANDARD_ATAPI + /* If the drive doesn't recognize the READ CD opcode, retry the command + with an older opcode for that command. */ + if (stat && reqbuf->sense_key == ILLEGAL_REQUEST && + reqbuf->asc == 0x20 && + CDROM_CONFIG_FLAGS (drive)->old_readcd == 0) { + printk ("%s: Drive does not recognize READ_CD;" + "trying opcode 0xd4\n", + drive->name); + CDROM_CONFIG_FLAGS (drive)->old_readcd = 1; + return cdrom_read_block (drive, format, lba, nblocks, + buf, buflen, reqbuf); + } +#endif /* not STANDARD_ATAPI */ + + return stat; +} + + +/* If SLOT<0, unload the current slot. Otherwise, try to load SLOT. */ +static int +cdrom_load_unload (ide_drive_t *drive, int slot, + struct atapi_request_sense *reqbuf) +{ + /* if the drive is a Sanyo 3 CD changer then TEST_UNIT_READY + (used in the cdrom_check_status function) is used to + switch CDs instead of LOAD_UNLOAD */ + + if (CDROM_STATE_FLAGS (drive)->sanyo_slot > 0) { + + if ((slot == 1) || (slot == 2)) { + CDROM_STATE_FLAGS (drive)->sanyo_slot = slot; + } else if (slot >= 0) { + CDROM_STATE_FLAGS (drive)->sanyo_slot = 3; + } else { + return 0; + } + + return cdrom_check_status (drive, NULL); + + } else { + + /* ATAPI Rev. 2.2+ standard for requesting switching of + CDs in a multiplatter device */ + + struct packet_command pc; + + memset (&pc, 0, sizeof (pc)); + pc.sense_data = reqbuf; + + pc.c[0] = LOAD_UNLOAD; + pc.c[4] = 2 + (slot >= 0); + pc.c[8] = slot; + return cdrom_queue_packet_command (drive, &pc); + + } +} + + +int ide_cdrom_ioctl (ide_drive_t *drive, struct inode *inode, + struct file *file, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case CDROMEJECT: { + int stat; + + if (drive->usage > 1) + return -EBUSY; + + stat = cdrom_lockdoor (drive, 0, NULL); + if (stat) return stat; + + return cdrom_eject (drive, 0, NULL); + } + + case CDROMCLOSETRAY: { + int stat; + if (drive->usage > 1) + return -EBUSY; + + stat = cdrom_eject (drive, 1, NULL); + if (stat) return stat; + + return cdrom_lockdoor (drive, 1, NULL); + } + + case CDROMEJECT_SW: { + CDROM_STATE_FLAGS (drive)->eject_on_close = arg; + return 0; + } + + case CDROMPAUSE: + return cdrom_pause (drive, 1, NULL); + + case CDROMRESUME: + return cdrom_pause (drive, 0, NULL); + + case CDROMSTART: + return cdrom_startstop (drive, 1, NULL); + + case CDROMSTOP: { +#ifdef IHAVEADOLPHIN + /* Certain Drives require this. Most don't + and will produce errors upon CDROMSTOP + pit says the Dolphin needs this. If you + own a dolphin, just define IHAVEADOLPHIN somewhere */ + int stat; + stat = cdrom_startstop (drive, 0, NULL); + if (stat) return stat; + return cdrom_eject (drive, 1, NULL); +#endif /* end of IHAVEADOLPHIN */ + return cdrom_startstop (drive, 0, NULL); + } + + case CDROMPLAYMSF: { + struct cdrom_msf msf; + int stat, lba_start, lba_end; + + stat = verify_area (VERIFY_READ, (void *)arg, sizeof (msf)); + if (stat) return stat; + + memcpy_fromfs (&msf, (void *) arg, sizeof(msf)); + + lba_start = msf_to_lba (msf.cdmsf_min0, msf.cdmsf_sec0, + msf.cdmsf_frame0); + lba_end = msf_to_lba (msf.cdmsf_min1, msf.cdmsf_sec1, + msf.cdmsf_frame1) + 1; + + if (lba_end <= lba_start) return -EINVAL; + + return cdrom_play_lba_range (drive, lba_start, lba_end, NULL); + } + + /* Like just about every other Linux cdrom driver, we ignore the + index part of the request here. */ + case CDROMPLAYTRKIND: { + int stat, lba_start, lba_end; + struct cdrom_ti ti; + struct atapi_toc_entry *first_toc, *last_toc; + + stat = verify_area (VERIFY_READ, (void *)arg, sizeof (ti)); + if (stat) return stat; + + memcpy_fromfs (&ti, (void *) arg, sizeof(ti)); + + stat = cdrom_get_toc_entry (drive, ti.cdti_trk0, &first_toc, + NULL); + if (stat) return stat; + stat = cdrom_get_toc_entry (drive, ti.cdti_trk1, &last_toc, + NULL); + if (stat) return stat; + + if (ti.cdti_trk1 != CDROM_LEADOUT) ++last_toc; + lba_start = first_toc->addr.lba; + lba_end = last_toc->addr.lba; + + if (lba_end <= lba_start) return -EINVAL; + + return cdrom_play_lba_range (drive, lba_start, lba_end, NULL); + } + + case CDROMREADTOCHDR: { + int stat; + struct cdrom_tochdr tochdr; + struct atapi_toc *toc; + + stat = verify_area (VERIFY_WRITE, (void *) arg, + sizeof (tochdr)); + if (stat) return stat; + + /* Make sure our saved TOC is valid. */ + stat = cdrom_read_toc (drive, NULL); + if (stat) return stat; + + toc = drive->cdrom_info.toc; + tochdr.cdth_trk0 = toc->hdr.first_track; + tochdr.cdth_trk1 = toc->hdr.last_track; + + memcpy_tofs ((void *) arg, &tochdr, sizeof (tochdr)); + + return stat; + } + + case CDROMREADTOCENTRY: { + int stat; + struct cdrom_tocentry tocentry; + struct atapi_toc_entry *toce; + + stat = verify_area (VERIFY_WRITE, (void *) arg, + sizeof (tocentry)); + if (stat) return stat; + + memcpy_fromfs (&tocentry, (void *) arg, sizeof (tocentry)); + + stat = cdrom_get_toc_entry (drive, tocentry.cdte_track, &toce, + NULL); + if (stat) return stat; + + tocentry.cdte_ctrl = toce->control; + tocentry.cdte_adr = toce->adr; + + if (tocentry.cdte_format == CDROM_MSF) { + /* convert to MSF */ + lba_to_msf (toce->addr.lba, + &tocentry.cdte_addr.msf.minute, + &tocentry.cdte_addr.msf.second, + &tocentry.cdte_addr.msf.frame); + } else + tocentry.cdte_addr.lba = toce->addr.lba; + + memcpy_tofs ((void *) arg, &tocentry, sizeof (tocentry)); + + return stat; + } + + case CDROMSUBCHNL: { + struct atapi_cdrom_subchnl scbuf; + int stat; + struct cdrom_subchnl subchnl; + + stat = verify_area (VERIFY_WRITE, (void *) arg, + sizeof (subchnl)); + if (stat) return stat; + + memcpy_fromfs (&subchnl, (void *) arg, sizeof (subchnl)); + + stat = cdrom_read_subchannel (drive, 1, /* current position */ + (char *)&scbuf, sizeof (scbuf), + NULL); + if (stat) return stat; + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS (drive)->subchan_as_bcd) { + msf_from_bcd (&scbuf.acdsc_absaddr.msf); + msf_from_bcd (&scbuf.acdsc_reladdr.msf); + } + if (CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd) + scbuf.acdsc_trk = bcd2bin (scbuf.acdsc_trk); +#endif /* not STANDARD_ATAPI */ + + if (subchnl.cdsc_format == CDROM_MSF) { + subchnl.cdsc_absaddr.msf.minute = + scbuf.acdsc_absaddr.msf.minute; + subchnl.cdsc_absaddr.msf.second = + scbuf.acdsc_absaddr.msf.second; + subchnl.cdsc_absaddr.msf.frame = + scbuf.acdsc_absaddr.msf.frame; + + subchnl.cdsc_reladdr.msf.minute = + scbuf.acdsc_reladdr.msf.minute; + subchnl.cdsc_reladdr.msf.second = + scbuf.acdsc_reladdr.msf.second; + subchnl.cdsc_reladdr.msf.frame = + scbuf.acdsc_reladdr.msf.frame; + } else { + subchnl.cdsc_absaddr.lba = + msf_to_lba (scbuf.acdsc_absaddr.msf.minute, + scbuf.acdsc_absaddr.msf.second, + scbuf.acdsc_absaddr.msf.frame); + subchnl.cdsc_reladdr.lba = + msf_to_lba (scbuf.acdsc_reladdr.msf.minute, + scbuf.acdsc_reladdr.msf.second, + scbuf.acdsc_reladdr.msf.frame); + } + + subchnl.cdsc_audiostatus = scbuf.acdsc_audiostatus; + subchnl.cdsc_ctrl = scbuf.acdsc_ctrl; + subchnl.cdsc_trk = scbuf.acdsc_trk; + subchnl.cdsc_ind = scbuf.acdsc_ind; + + memcpy_tofs ((void *) arg, &subchnl, sizeof (subchnl)); + + return stat; + } + + case CDROMVOLCTRL: { + struct cdrom_volctrl volctrl; + char buffer[24], mask[24]; + int stat; + + stat = verify_area (VERIFY_READ, (void *) arg, + sizeof (volctrl)); + if (stat) return stat; + memcpy_fromfs (&volctrl, (void *) arg, sizeof (volctrl)); + + stat = cdrom_mode_sense (drive, 0x0e, 0, buffer, + sizeof (buffer), NULL); + if (stat) return stat; + stat = cdrom_mode_sense (drive, 0x0e, 1, mask, + sizeof (buffer), NULL); + if (stat) return stat; + + buffer[1] = buffer[2] = 0; + + buffer[17] = volctrl.channel0 & mask[17]; + buffer[19] = volctrl.channel1 & mask[19]; + buffer[21] = volctrl.channel2 & mask[21]; + buffer[23] = volctrl.channel3 & mask[23]; + + return cdrom_mode_select (drive, 0x0e, buffer, + sizeof (buffer), NULL); + } + + case CDROMVOLREAD: { + struct cdrom_volctrl volctrl; + char buffer[24]; + int stat; + + stat = verify_area (VERIFY_WRITE, (void *) arg, + sizeof (volctrl)); + if (stat) return stat; + + stat = cdrom_mode_sense (drive, 0x0e, 0, buffer, + sizeof (buffer), NULL); + if (stat) return stat; + + volctrl.channel0 = buffer[17]; + volctrl.channel1 = buffer[19]; + volctrl.channel2 = buffer[21]; + volctrl.channel3 = buffer[23]; + + memcpy_tofs ((void *) arg, &volctrl, sizeof (volctrl)); + + return 0; + } + + case CDROMMULTISESSION: { + struct cdrom_multisession ms_info; + struct atapi_toc *toc; + int stat; + + stat = verify_area (VERIFY_WRITE, (void *)arg, + sizeof (ms_info)); + if (stat) return stat; + + memcpy_fromfs (&ms_info, (void *)arg, sizeof (ms_info)); + + /* Make sure the TOC information is valid. */ + stat = cdrom_read_toc (drive, NULL); + if (stat) return stat; + + toc = drive->cdrom_info.toc; + + if (ms_info.addr_format == CDROM_MSF) + lba_to_msf (toc->last_session_lba, + &ms_info.addr.msf.minute, + &ms_info.addr.msf.second, + &ms_info.addr.msf.frame); + else if (ms_info.addr_format == CDROM_LBA) + ms_info.addr.lba = toc->last_session_lba; + else + return -EINVAL; + + ms_info.xa_flag = toc->xa_flag; + + memcpy_tofs ((void *)arg, &ms_info, sizeof (ms_info)); + + return 0; + } + + /* Read 2352 byte blocks from audio tracks. */ + case CDROMREADAUDIO: { + int stat, lba; + struct atapi_toc *toc; + struct cdrom_read_audio ra; + char *buf; + + /* Make sure the TOC is up to date. */ + stat = cdrom_read_toc (drive, NULL); + if (stat) return stat; + + toc = drive->cdrom_info.toc; + + stat = verify_area (VERIFY_READ, (char *)arg, sizeof (ra)); + if (stat) return stat; + + memcpy_fromfs (&ra, (void *)arg, sizeof (ra)); + + if (ra.nframes < 0 || ra.nframes > toc->capacity) + return -EINVAL; + else if (ra.nframes == 0) + return 0; + + stat = verify_area (VERIFY_WRITE, (char *)ra.buf, + ra.nframes * CD_FRAMESIZE_RAW); + if (stat) return stat; + + if (ra.addr_format == CDROM_MSF) + lba = msf_to_lba (ra.addr.msf.minute, + ra.addr.msf.second, + ra.addr.msf.frame); + else if (ra.addr_format == CDROM_LBA) + lba = ra.addr.lba; + else + return -EINVAL; + + if (lba < 0 || lba >= toc->capacity) + return -EINVAL; + + buf = (char *) kmalloc (CDROM_NBLOCKS_BUFFER*CD_FRAMESIZE_RAW, + GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + while (ra.nframes > 0) { + int this_nblocks = ra.nframes; + if (this_nblocks > CDROM_NBLOCKS_BUFFER) + this_nblocks = CDROM_NBLOCKS_BUFFER; + stat = cdrom_read_block + (drive, 1, lba, this_nblocks, + buf, this_nblocks * CD_FRAMESIZE_RAW, NULL); + if (stat) break; + + memcpy_tofs (ra.buf, buf, + this_nblocks * CD_FRAMESIZE_RAW); + ra.buf += this_nblocks * CD_FRAMESIZE_RAW; + ra.nframes -= this_nblocks; + lba += this_nblocks; + } + + kfree (buf); + return stat; + } + case CDROMREADRAW: + case CDROMREADMODE1: + case CDROMREADMODE2: { + struct cdrom_msf msf; + int blocksize, format, stat, lba; + char *buf; + + if (cmd == CDROMREADMODE1) { + blocksize = CD_FRAMESIZE; + format = 2; + } else if (cmd == CDROMREADMODE2) { + blocksize = CD_FRAMESIZE_RAW0; + format = 3; + } else { + blocksize = CD_FRAMESIZE_RAW; + format = 0; + } + + stat = verify_area (VERIFY_WRITE, (char *)arg, blocksize); + if (stat) return stat; + + memcpy_fromfs (&msf, (void *)arg, sizeof (msf)); + + lba = msf_to_lba (msf.cdmsf_min0, + msf.cdmsf_sec0, + msf.cdmsf_frame0); + + /* DON'T make sure the TOC is up to date. */ + /* stat = cdrom_read_toc (drive, NULL); + if (stat) return stat; + + toc = drive->cdrom_info.toc; + + if (lba < 0 || lba >= toc->capacity) + return -EINVAL; */ + + buf = (char *) kmalloc (CD_FRAMESIZE_RAW, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + stat = cdrom_read_block (drive, format, lba, 1, buf, blocksize, + NULL); + if (stat == 0) + memcpy_tofs ((char *)arg, buf, blocksize); + + kfree (buf); + return stat; + } + + case CDROM_GET_UPC: { + int stat; + char mcnbuf[24]; + struct cdrom_mcn mcn; + + stat = verify_area (VERIFY_WRITE, (void *) arg, + sizeof (mcn)); + if (stat) return stat; + + stat = cdrom_read_subchannel (drive, 2, /* get MCN */ + mcnbuf, sizeof (mcnbuf), + NULL); + if (stat) return stat; + + memcpy (mcn.medium_catalog_number, mcnbuf+9, + sizeof (mcn.medium_catalog_number)-1); + mcn.medium_catalog_number[sizeof (mcn.medium_catalog_number)-1] + = '\0'; + + memcpy_tofs ((void *) arg, &mcn, sizeof (mcn)); + + return stat; + } + + case CDROMLOADFROMSLOT: + printk ("%s: Use CDROM_SELECT_DISC " + " instead of CDROMLOADFROMSLOT.\n", drive->name); + /* Fall through. */ + + case CDROM_SELECT_DISC: { + struct atapi_request_sense my_reqbuf; + int stat; + + if (drive->usage > 1) + return -EBUSY; + + (void) cdrom_load_unload (drive, -1, NULL); + + cdrom_saw_media_change (drive); + if (arg == -1) { + (void) cdrom_lockdoor (drive, 0, NULL); + return 0; + } + (void) cdrom_load_unload (drive, (int)arg, NULL); + + stat = cdrom_check_status (drive, &my_reqbuf); + if (stat && my_reqbuf.sense_key == NOT_READY) { + return -ENOENT; + } + + /* And try to read the TOC information now. */ + return cdrom_read_toc (drive, &my_reqbuf); + } + +#if 0 /* Doesn't work reliably yet. */ + case CDROMRESET: { + struct request req; + ide_init_drive_cmd (&req); + req.cmd = RESET_DRIVE_COMMAND; + return ide_do_drive_cmd (drive, &req, ide_wait); + } +#endif + + +#ifdef TEST + case 0x1234: { + int stat; + struct packet_command pc; + int len, lena; + + memset (&pc, 0, sizeof (pc)); + + stat = verify_area (VERIFY_READ, (void *) arg, sizeof (pc.c)); + if (stat) return stat; + memcpy_fromfs (&pc.c, (void *) arg, sizeof (pc.c)); + arg += sizeof (pc.c); + + stat = verify_area (VERIFY_READ, (void *) arg, sizeof (len)); + if (stat) return stat; + memcpy_fromfs (&len, (void *) arg , sizeof (len)); + arg += sizeof (len); + + if (len > 0) { + stat = verify_area (VERIFY_WRITE, (void *) arg, len); + if (stat) return stat; + } + + lena = len; + if (lena < 0) lena = 0; + + { + char buf[lena]; + if (len > 0) { + pc.buflen = len; + pc.buffer = buf; + } + + stat = cdrom_queue_packet_command (drive, &pc); + + if (len > 0) + memcpy_tofs ((void *)arg, buf, len); + } + + return stat; + } +#endif + + default: + return -EPERM; + } + +} + + + +/**************************************************************************** + * Other driver requests (open, close, check media change). + */ + +int ide_cdrom_check_media_change (ide_drive_t *drive) +{ + int retval; + + (void) cdrom_check_status (drive, NULL); + + retval = CDROM_STATE_FLAGS (drive)->media_changed; + CDROM_STATE_FLAGS (drive)->media_changed = 0; + + return retval; +} + + +int ide_cdrom_open (struct inode *ip, struct file *fp, ide_drive_t *drive) +{ + /* no write access */ + if (fp->f_mode & 2) { + --drive->usage; + return -EROFS; + } + + /* If this is the first open, check the drive status. */ + if (drive->usage == 1) { + int stat; + struct atapi_request_sense my_reqbuf; + my_reqbuf.sense_key = 0; + + /* Get the drive status. */ + stat = cdrom_check_status (drive, &my_reqbuf); + + /* If the tray is open, try to close it. */ + if (stat && my_reqbuf.sense_key == NOT_READY) { + cdrom_eject (drive, 1, &my_reqbuf); + stat = cdrom_check_status (drive, &my_reqbuf); + } + + /* If things worked ok, lock the door and read the + TOC information. */ + if (stat == 0 || my_reqbuf.sense_key == UNIT_ATTENTION) { + (void) cdrom_lockdoor (drive, 1, &my_reqbuf); + (void) cdrom_read_toc (drive, &my_reqbuf); + } + } + + return 0; +} + + +/* + * Close down the device. Invalidate all cached blocks. + */ + +void ide_cdrom_release (struct inode *inode, struct file *file, + ide_drive_t *drive) +{ + if (drive->usage == 0) { + invalidate_buffers (inode->i_rdev); + + /* Unlock the door. */ + (void) cdrom_lockdoor (drive, 0, NULL); + + /* Do an eject if we were requested to do so. */ + if (CDROM_STATE_FLAGS (drive)->eject_on_close) + (void) cdrom_eject (drive, 0, NULL); + } +} + + + +/**************************************************************************** + * Device initialization. + */ + +void ide_cdrom_setup (ide_drive_t *drive) +{ + blksize_size[HWIF(drive)->major][drive->select.b.unit << PARTN_BITS] = + CD_FRAMESIZE; + + drive->special.all = 0; + drive->ready_stat = 0; + + CDROM_STATE_FLAGS (drive)->media_changed = 0; + CDROM_STATE_FLAGS (drive)->toc_valid = 0; + CDROM_STATE_FLAGS (drive)->door_locked = 0; + + /* Turn this off by default, since many people don't like it. */ + CDROM_STATE_FLAGS (drive)->eject_on_close= 0; + +#if NO_DOOR_LOCKING + CDROM_CONFIG_FLAGS (drive)->no_doorlock = 1; +#else + CDROM_CONFIG_FLAGS (drive)->no_doorlock = 0; +#endif + + /* by default Sanyo 3 CD changer support is turned off and + ATAPI Rev 2.2+ standard support for CD changers is used */ + CDROM_STATE_FLAGS (drive)->sanyo_slot = 0; + + if (drive->id != NULL) + CDROM_CONFIG_FLAGS (drive)->drq_interrupt = + ((drive->id->config & 0x0060) == 0x20); + else + CDROM_CONFIG_FLAGS (drive)->drq_interrupt = 0; + +#if ! STANDARD_ATAPI + drive->cdrom_info.max_sectors = 252; + + CDROM_CONFIG_FLAGS (drive)->old_readcd = 0; + CDROM_CONFIG_FLAGS (drive)->toctracks_as_bcd = 0; + CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd = 0; + CDROM_CONFIG_FLAGS (drive)->playmsf_as_bcd = 0; + CDROM_CONFIG_FLAGS (drive)->subchan_as_bcd = 0; + + if (drive->id != NULL) { + if (strcmp (drive->id->model, "V003S0DS") == 0 && + drive->id->fw_rev[4] == '1' && + drive->id->fw_rev[6] <= '2') { + /* Vertos 300. + Some versions of this drive like to talk BCD. */ + CDROM_CONFIG_FLAGS (drive)->toctracks_as_bcd = 1; + CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd = 1; + CDROM_CONFIG_FLAGS (drive)->playmsf_as_bcd = 1; + CDROM_CONFIG_FLAGS (drive)->subchan_as_bcd = 1; + } + + else if (strcmp (drive->id->model, "V006E0DS") == 0 && + drive->id->fw_rev[4] == '1' && + drive->id->fw_rev[6] <= '2') { + /* Vertos 600 ESD. */ + CDROM_CONFIG_FLAGS (drive)->toctracks_as_bcd = 1; + } + + else if (strcmp (drive->id->model, "GCD-R580B") == 0) + drive->cdrom_info.max_sectors = 124; + + else if (strcmp (drive->id->model, + "NEC CD-ROM DRIVE:260") == 0 && + strcmp (drive->id->fw_rev, "1.01") == 0) { + /* Old NEC260 (not R). */ + CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd = 1; + CDROM_CONFIG_FLAGS (drive)->playmsf_as_bcd = 1; + CDROM_CONFIG_FLAGS (drive)->subchan_as_bcd = 1; + } + + else if (strcmp (drive->id->model, "WEARNES CDD-120") == 0 && + strcmp (drive->id->fw_rev, "A1.1") == 0) { + /* Wearnes */ + CDROM_CONFIG_FLAGS (drive)->playmsf_as_bcd = 1; + CDROM_CONFIG_FLAGS (drive)->subchan_as_bcd = 1; + } + + /* Sanyo 3 CD changer uses a non-standard command + for CD changing */ + else if ((strcmp(drive->id->model, "CD-ROM CDR-C3 G") == 0) || + (strcmp(drive->id->model, "CD-ROM CDR-C3G") == 0) || + (strcmp(drive->id->model, "CD-ROM CDR_C36") == 0)) { + /* uses CD in slot 0 when value is set to 3 */ + CDROM_STATE_FLAGS (drive)->sanyo_slot = 3; + } + + } +#endif /* not STANDARD_ATAPI */ + + drive->cdrom_info.toc = NULL; + drive->cdrom_info.sector_buffer = NULL; + drive->cdrom_info.sector_buffered = 0; + drive->cdrom_info.nsectors_buffered = 0; +} + + + +/* + * TODO (for 2.1?): + * Avoid printing error messages for expected errors from the drive. + * Integrate with generic cdrom driver. + * Query the drive to find what features are available + * before trying to use them. + * Integrate spindown time adjustment patch. + * Modularize. + * CDROMRESET ioctl. + * Better support for changers. + */ + + + +/*==========================================================================*/ +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ diff --git a/linux/src/drivers/block/ide.c b/linux/src/drivers/block/ide.c new file mode 100644 index 00000000..90f21b48 --- /dev/null +++ b/linux/src/drivers/block/ide.c @@ -0,0 +1,3812 @@ +/* + * linux/drivers/block/ide.c Version 5.53 Jun 24, 1997 + * + * Copyright (C) 1994-1996 Linus Torvalds & authors (see below) + */ +#define _IDE_C /* needed by <linux/blk.h> */ + +/* + * Maintained by Mark Lord <mlord@pobox.com> + * and Gadi Oxman <gadio@netvision.net.il> + * + * This is the multiple IDE interface driver, as evolved from hd.c. + * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15). + * There can be up to two drives per interface, as per the ATA-2 spec. + * + * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64 + * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64 + * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64 + * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64 + * + * It is easy to extend ide.c to handle more than four interfaces: + * + * Change the MAX_HWIFS constant in ide.h. + * + * Define some new major numbers (in major.h), and insert them into + * the ide_hwif_to_major table in ide.c. + * + * Fill in the extra values for the new interfaces into the two tables + * inside ide.c: default_io_base[] and default_irqs[]. + * + * Create the new request handlers by cloning "do_ide3_request()" + * for each new interface, and add them to the switch statement + * in the ide_init() function in ide.c. + * + * Recompile, create the new /dev/ entries, and it will probably work. + * + * From hd.c: + * | + * | It traverses the request-list, using interrupts to jump between functions. + * | As nearly all functions can be called within interrupts, we may not sleep. + * | Special care is recommended. Have Fun! + * | + * | modified by Drew Eckhardt to check nr of hd's from the CMOS. + * | + * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug + * | in the early extended-partition checks and added DM partitions. + * | + * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). + * | + * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", + * | and general streamlining by Mark Lord (mlord@pobox.com). + * + * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: + * + * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) + * Delman Lee (delman@mipg.upenn.edu) ("Mr. atdisk2") + * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) + * + * This was a rewrite of just about everything from hd.c, though some original + * code is still sprinkled about. Think of it as a major evolution, with + * inspiration from lots of linux users, esp. hamish@zot.apana.org.au + * + * Version 1.0 ALPHA initial code, primary i/f working okay + * Version 1.3 BETA dual i/f on shared irq tested & working! + * Version 1.4 BETA added auto probing for irq(s) + * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms, + * ... + * Version 3.5 correct the bios_cyl field if it's too small + * (linux 1.1.76) (to help fdisk with brain-dead BIOSs) + * Version 3.6 cosmetic corrections to comments and stuff + * (linux 1.1.77) reorganise probing code to make it understandable + * added halfway retry to probing for drive identification + * added "hdx=noprobe" command line option + * allow setting multmode even when identification fails + * Version 3.7 move set_geometry=1 from do_identify() to ide_init() + * increase DRQ_WAIT to eliminate nuisance messages + * wait for DRQ_STAT instead of DATA_READY during probing + * (courtesy of Gary Thomas gary@efland.UU.NET) + * Version 3.8 fixed byte-swapping for confused Mitsumi cdrom drives + * update of ide-cd.c from Scott, allows blocksize=1024 + * cdrom probe fixes, inspired by jprang@uni-duisburg.de + * Version 3.9 don't use LBA if lba_capacity looks funny + * correct the drive capacity calculations + * fix probing for old Seagates without IDE_ALTSTATUS_REG + * fix byte-ordering for some NEC cdrom drives + * Version 3.10 disable multiple mode by default; was causing trouble + * Version 3.11 fix mis-identification of old WD disks as cdroms + * Version 3,12 simplify logic for selecting initial mult_count + * (fixes problems with buggy WD drives) + * Version 3.13 remove excess "multiple mode disabled" messages + * Version 3.14 fix ide_error() handling of BUSY_STAT + * fix byte-swapped cdrom strings (again.. arghh!) + * ignore INDEX bit when checking the ALTSTATUS reg + * Version 3.15 add SINGLE_THREADED flag for use with dual-CMD i/f + * ignore WRERR_STAT for non-write operations + * added vlb_sync support for DC-2000A & others, + * (incl. some Promise chips), courtesy of Frank Gockel + * Version 3.16 convert vlb_32bit and vlb_sync into runtime flags + * add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET) + * rename SINGLE_THREADED to SUPPORT_SERIALIZE, + * add boot flag to "serialize" operation for CMD i/f + * add optional support for DTC2278 interfaces, + * courtesy of andy@cercle.cts.com (Dyan Wile). + * add boot flag to enable "dtc2278" probe + * add probe to avoid EATA (SCSI) interfaces, + * courtesy of neuffer@goofy.zdv.uni-mainz.de. + * Version 4.00 tidy up verify_area() calls - heiko@colossus.escape.de + * add flag to ignore WRERR_STAT for some drives + * courtesy of David.H.West@um.cc.umich.edu + * assembly syntax tweak to vlb_sync + * removable drive support from scuba@cs.tu-berlin.de + * add transparent support for DiskManager-6.0x "Dynamic + * Disk Overlay" (DDO), most of this is in genhd.c + * eliminate "multiple mode turned off" message at boot + * Version 4.10 fix bug in ioctl for "hdparm -c3" + * fix DM6:DDO support -- now works with LILO, fdisk, ... + * don't treat some naughty WD drives as removable + * Version 4.11 updated DM6 support using info provided by OnTrack + * Version 5.00 major overhaul, multmode setting fixed, vlb_sync fixed + * added support for 3rd/4th/alternative IDE ports + * created ide.h; ide-cd.c now compiles separate from ide.c + * hopefully fixed infinite "unexpected_intr" from cdroms + * zillions of other changes and restructuring + * somehow reduced overall memory usage by several kB + * probably slowed things down slightly, but worth it + * Version 5.01 AT LAST!! Finally understood why "unexpected_intr" + * was happening at various times/places: whenever the + * ide-interface's ctl_port was used to "mask" the irq, + * it also would trigger an edge in the process of masking + * which would result in a self-inflicted interrupt!! + * (such a stupid way to build a hardware interrupt mask). + * This is now fixed (after a year of head-scratching). + * Version 5.02 got rid of need for {enable,disable}_irq_list() + * Version 5.03 tune-ups, comments, remove "busy wait" from drive resets + * removed PROBE_FOR_IRQS option -- no longer needed + * OOOPS! fixed "bad access" bug for 2nd drive on an i/f + * Version 5.04 changed "ira %d" to "irq %d" in DEBUG message + * added more comments, cleaned up unexpected_intr() + * OOOPS! fixed null pointer problem in ide reset code + * added autodetect for Triton chipset -- no effect yet + * Version 5.05 OOOPS! fixed bug in revalidate_disk() + * OOOPS! fixed bug in ide_do_request() + * added ATAPI reset sequence for cdroms + * Version 5.10 added Bus-Mastered DMA support for Triton Chipset + * some (mostly) cosmetic changes + * Version 5.11 added ht6560b support by malafoss@snakemail.hut.fi + * reworked PCI scanning code + * added automatic RZ1000 detection/support + * added automatic PCI CMD640 detection/support + * added option for VLB CMD640 support + * tweaked probe to find cdrom on hdb with disks on hda,hdc + * Version 5.12 some performance tuning + * added message to alert user to bad /dev/hd[cd] entries + * OOOPS! fixed bug in atapi reset + * driver now forces "serialize" again for all cmd640 chips + * noticed REALLY_SLOW_IO had no effect, moved it to ide.c + * made do_drive_cmd() into public ide_do_drive_cmd() + * Version 5.13 fixed typo ('B'), thanks to houston@boyd.geog.mcgill.ca + * fixed ht6560b support + * Version 5.13b (sss) fix problem in calling ide_cdrom_setup() + * don't bother invalidating nonexistent partitions + * Version 5.14 fixes to cmd640 support.. maybe it works now(?) + * added & tested full EZ-DRIVE support -- don't use LILO! + * don't enable 2nd CMD640 PCI port during init - conflict + * Version 5.15 bug fix in init_cmd640_vlb() + * bug fix in interrupt sharing code + * Version 5.16 ugh.. fix "serialize" support, broken in 5.15 + * remove "Huh?" from cmd640 code + * added qd6580 interface speed select from Colten Edwards + * Version 5.17 kludge around bug in BIOS32 on Intel triton motherboards + * Version 5.18 new CMD640 code, moved to cmd640.c, #include'd for now + * new UMC8672 code, moved to umc8672.c, #include'd for now + * disallow turning on DMA when h/w not capable of DMA + * Version 5.19 fix potential infinite timeout on resets + * extend reset poll into a general purpose polling scheme + * add atapi tape drive support from Gadi Oxman + * simplify exit from _intr routines -- no IDE_DO_REQUEST + * Version 5.20 leave current rq on blkdev request list during I/O + * generalized ide_do_drive_cmd() for tape/cdrom driver use + * Version 5.21 fix nasty cdrom/tape bug (ide_preempt was messed up) + * Version 5.22 fix ide_xlate_1024() to work with/without drive->id + * Version 5.23 miscellaneous touch-ups + * Version 5.24 fix #if's for SUPPORT_CMD640 + * Version 5.25 more touch-ups, fix cdrom resets, ... + * cmd640.c now configs/compiles separate from ide.c + * Version 5.26 keep_settings now maintains the using_dma flag + * fix [EZD] remap message to only output at boot time + * fix "bad /dev/ entry" message to say hdc, not hdc0 + * fix ide_xlate_1024() to respect user specified CHS + * use CHS from partn table if it looks translated + * re-merged flags chipset,vlb_32bit,vlb_sync into io_32bit + * keep track of interface chipset type, when known + * add generic PIO mode "tuneproc" mechanism + * fix cmd640_vlb option + * fix ht6560b support (was completely broken) + * umc8672.c now configures/compiles separate from ide.c + * move dtc2278 support to dtc2278.c + * move ht6560b support to ht6560b.c + * move qd6580 support to qd6580.c + * add ali14xx support in ali14xx.c + * Version 5.27 add [no]autotune parameters to help cmd640 + * move rz1000 support to rz1000.c + * Version 5.28 #include "ide_modes.h" + * fix disallow_unmask: now per-interface "no_unmask" bit + * force io_32bit to be the same on drive pairs of dtc2278 + * improved IDE tape error handling, and tape DMA support + * bugfix in ide_do_drive_cmd() for cdroms + serialize + * Version 5.29 fixed non-IDE check for too many physical heads + * don't use LBA if capacity is smaller than CHS + * Version 5.30 remove real_devices kludge, formerly used by genhd.c + * Version 5.32 change "KB" to "kB" + * fix serialize (was broken in kernel 1.3.72) + * add support for "hdparm -I" + * use common code for disk/tape/cdrom IDE_DRIVE_CMDs + * add support for Promise DC4030VL caching card + * improved serialize support + * put partition check back into alphabetical order + * add config option for PCMCIA baggage + * try to make PCMCIA support safer to use + * improve security on ioctls(): all are suser() only + * Version 5.33 improve handling of HDIO_DRIVE_CMDs that read data + * Version 5.34 fix irq-sharing problem from 5.33 + * fix cdrom ioctl problem from 5.33 + * Version 5.35 cosmetic changes + * fix cli() problem in try_to_identify() + * Version 5.36 fixes to optional PCMCIA support + * Version 5.37 don't use DMA when "noautotune" is specified + * Version 5.37a (go) fix shared irq probing (was broken in kernel 1.3.72) + * call unplug_device() from ide_do_drive_cmd() + * Version 5.38 add "hdx=none" option, courtesy of Joel Maslak + * mask drive irq after use, if sharing with another hwif + * add code to help debug weird cmd640 problems + * Version 5.39 fix horrible error in earlier irq sharing "fix" + * Version 5.40 fix serialization -- was broken in 5.39 + * help sharing by masking device irq after probing + * Version 5.41 more fixes to irq sharing/serialize detection + * disable io_32bit by default on drive reset + * Version 5.42 simplify irq-masking after probe + * fix NULL pointer deref in save_match() + * Version 5.43 Ugh.. unexpected_intr is back: try to exterminate it + * Version 5.44 Fix for "irq probe failed" on cmd640 + * change path on message regarding MAKEDEV.ide + * add a throttle to the unexpected_intr() messages + * Version 5.45 fix ugly parameter parsing bugs (thanks Derek) + * include Gadi's magic fix for cmd640 unexpected_intr + * include mc68000 patches from Geert Uytterhoeven + * add Gadi's fix for PCMCIA cdroms + * Version 5.46 remove the mc68000 #ifdefs for 2.0.x + * Version 5.47 fix set_tune race condition + * fix bug in earlier PCMCIA cdrom update + * Version 5.48 if def'd, invoke CMD640_DUMP_REGS when irq probe fails + * lengthen the do_reset1() pulse, for laptops + * add idebus=xx parameter for cmd640 and ali chipsets + * no_unmask flag now per-drive instead of per-hwif + * fix tune_req so that it gets done immediately + * fix missing restore_flags() in ide_ioctl + * prevent use of io_32bit on cmd640 with no prefetch + * Version 5.49 fix minor quirks in probing routines + * Version 5.50 allow values as small as 20 for idebus= + * Version 5.51 force non io_32bit in drive_cmd_intr() + * change delay_10ms() to delay_50ms() to fix problems + * Version 5.52 fix incorrect invalidation of removable devices + * add "hdx=slow" command line option + * Version 5.53 add ATAPI floppy drive support + * change default media for type 0 to floppy + * add support for Exabyte Nest + * add missing set_blocksize() in revalidate_disk() + * handle bad status bit sequencing in ide_wait_stat() + * support partition table translations with 255 heads + * probe all interfaces by default + * add probe for the i82371AB chipset + * acknowledge media change on removable drives + * add work-around for BMI drives + * remove "LBA" from boot messages + * Version 5.53.1 add UDMA "CRC retry" support + * Version 5.53.2 add Promise/33 auto-detection and DMA support + * fix MC_ERR handling + * fix mis-detection of NEC cdrom as floppy + * issue ATAPI reset and re-probe after "no response" + * + * Some additional driver compile-time options are in ide.h + * + * To do, in likely order of completion: + * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f +*/ + +#undef REALLY_SLOW_IO /* most systems can safely undef this */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/major.h> +#include <linux/blkdev.h> +#include <linux/errno.h> +#include <linux/hdreg.h> +#include <linux/genhd.h> +#include <linux/malloc.h> + +#include <asm/byteorder.h> +#include <asm/irq.h> +#include <asm/segment.h> +#include <asm/io.h> + +#ifdef CONFIG_PCI +#include <linux/bios32.h> +#include <linux/pci.h> +#endif /* CONFIG_PCI */ + +#include "ide.h" +#include "ide_modes.h" + +#ifdef CONFIG_BLK_DEV_PROMISE +#include "promise.h" +#define IS_PROMISE_DRIVE (HWIF(drive)->chipset == ide_promise) +#else +#define IS_PROMISE_DRIVE (0) /* auto-NULLs out Promise code */ +#endif /* CONFIG_BLK_DEV_PROMISE */ + +static const byte ide_hwif_to_major[MAX_HWIFS] = {IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR}; +static const unsigned short default_io_base[MAX_HWIFS] = {0x1f0, 0x170, 0x1e8, 0x168}; +static const byte default_irqs[MAX_HWIFS] = {14, 15, 11, 10}; +static int idebus_parameter; /* holds the "idebus=" parameter */ +static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ + +/* + * This is declared extern in ide.h, for access by other IDE modules: + */ +ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ + +#if (DISK_RECOVERY_TIME > 0) +/* + * For really screwy hardware (hey, at least it *can* be used with Linux) + * we can enforce a minimum delay time between successive operations. + */ +static unsigned long read_timer(void) +{ + unsigned long t, flags; + int i; + + save_flags(flags); + cli(); + t = jiffies * 11932; + outb_p(0, 0x43); + i = inb_p(0x40); + i |= inb(0x40) << 8; + restore_flags(flags); + return (t - i); +} + +static void set_recovery_timer (ide_hwif_t *hwif) +{ + hwif->last_time = read_timer(); +} +#define SET_RECOVERY_TIMER(drive) set_recovery_timer (drive) + +#else + +#define SET_RECOVERY_TIMER(drive) + +#endif /* DISK_RECOVERY_TIME */ + + +/* + * Do not even *think* about calling this! + */ +static void init_hwif_data (unsigned int index) +{ + byte *p; + unsigned int unit; + ide_hwif_t *hwif = &ide_hwifs[index]; + + /* bulk initialize hwif & drive info with zeros */ + p = ((byte *) hwif) + sizeof(ide_hwif_t); + do { + *--p = 0; + } while (p > (byte *) hwif); + + /* fill in any non-zero initial values */ + hwif->index = index; + hwif->io_base = default_io_base[index]; + hwif->ctl_port = hwif->io_base ? hwif->io_base+0x206 : 0x000; +#ifdef CONFIG_BLK_DEV_HD + if (hwif->io_base == HD_DATA) + hwif->noprobe = 1; /* may be overridden by ide_setup() */ +#endif /* CONFIG_BLK_DEV_HD */ + hwif->major = ide_hwif_to_major[index]; + hwif->name[0] = 'i'; + hwif->name[1] = 'd'; + hwif->name[2] = 'e'; + hwif->name[3] = '0' + index; +#ifdef CONFIG_BLK_DEV_IDETAPE + hwif->tape_drive = NULL; +#endif /* CONFIG_BLK_DEV_IDETAPE */ + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + + drive->select.all = (unit<<4)|0xa0; + drive->hwif = hwif; + drive->ctl = 0x08; + drive->ready_stat = READY_STAT; + drive->bad_wstat = BAD_W_STAT; + drive->special.b.recalibrate = 1; + drive->special.b.set_geometry = 1; + drive->name[0] = 'h'; + drive->name[1] = 'd'; + drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; + } +} + +/* + * init_ide_data() sets reasonable default values into all fields + * of all instances of the hwifs and drives, but only on the first call. + * Subsequent calls have no effect (they don't wipe out anything). + * + * This routine is normally called at driver initialization time, + * but may also be called MUCH earlier during kernel "command-line" + * parameter processing. As such, we cannot depend on any other parts + * of the kernel (such as memory allocation) to be functioning yet. + * + * This is too bad, as otherwise we could dynamically allocate the + * ide_drive_t structs as needed, rather than always consuming memory + * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. + */ +#define MAGIC_COOKIE 0x12345678 +static void init_ide_data (void) +{ + unsigned int index; + static unsigned long magic_cookie = MAGIC_COOKIE; + + if (magic_cookie != MAGIC_COOKIE) + return; /* already initialized */ + magic_cookie = 0; + + for (index = 0; index < MAX_HWIFS; ++index) + init_hwif_data(index); + + idebus_parameter = 0; + system_bus_speed = 0; +} + +/* + * ide_system_bus_speed() returns what we think is the system VESA/PCI + * bus speed (in Mhz). This is used for calculating interface PIO timings. + * The default is 40 for known PCI systems, 50 otherwise. + * The "idebus=xx" parameter can be used to override this value. + * The actual value to be used is computed/displayed the first time through. + */ +int ide_system_bus_speed (void) +{ + if (!system_bus_speed) { + if (idebus_parameter) + system_bus_speed = idebus_parameter; /* user supplied value */ +#ifdef CONFIG_PCI + else if (pcibios_present()) + system_bus_speed = 40; /* safe default value for PCI */ +#endif /* CONFIG_PCI */ + else + system_bus_speed = 50; /* safe default value for VESA and PCI */ + printk("ide: Assuming %dMhz system bus speed for PIO modes; override with idebus=xx\n", system_bus_speed); + } + return system_bus_speed; +} + +#if SUPPORT_VLB_SYNC +/* + * Some localbus EIDE interfaces require a special access sequence + * when using 32-bit I/O instructions to transfer data. We call this + * the "vlb_sync" sequence, which consists of three successive reads + * of the sector count register location, with interrupts disabled + * to ensure that the reads all happen together. + */ +static inline void do_vlb_sync (unsigned short port) { + (void) inb (port); + (void) inb (port); + (void) inb (port); +} +#endif /* SUPPORT_VLB_SYNC */ + +/* + * This is used for most PIO data transfers *from* the IDE interface + */ +void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount) +{ + unsigned short io_base = HWIF(drive)->io_base; + unsigned short data_reg = io_base+IDE_DATA_OFFSET; + byte io_32bit = drive->io_32bit; + + if (io_32bit) { +#if SUPPORT_VLB_SYNC + if (io_32bit & 2) { + cli(); + do_vlb_sync(io_base+IDE_NSECTOR_OFFSET); + insl(data_reg, buffer, wcount); + if (drive->unmask) + sti(); + } else +#endif /* SUPPORT_VLB_SYNC */ + insl(data_reg, buffer, wcount); + } else { +#if SUPPORT_SLOW_DATA_PORTS + if (drive->slow) { + unsigned short *ptr = (unsigned short *) buffer; + while (wcount--) { + *ptr++ = inw_p(data_reg); + *ptr++ = inw_p(data_reg); + } + } else +#endif /* SUPPORT_SLOW_DATA_PORTS */ + insw(data_reg, buffer, wcount<<1); + } +} + +/* + * This is used for most PIO data transfers *to* the IDE interface + */ +void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount) +{ + unsigned short io_base = HWIF(drive)->io_base; + unsigned short data_reg = io_base+IDE_DATA_OFFSET; + byte io_32bit = drive->io_32bit; + + if (io_32bit) { +#if SUPPORT_VLB_SYNC + if (io_32bit & 2) { + cli(); + do_vlb_sync(io_base+IDE_NSECTOR_OFFSET); + outsl(data_reg, buffer, wcount); + if (drive->unmask) + sti(); + } else +#endif /* SUPPORT_VLB_SYNC */ + outsl(data_reg, buffer, wcount); + } else { +#if SUPPORT_SLOW_DATA_PORTS + if (drive->slow) { + unsigned short *ptr = (unsigned short *) buffer; + while (wcount--) { + outw_p(*ptr++, data_reg); + outw_p(*ptr++, data_reg); + } + } else +#endif /* SUPPORT_SLOW_DATA_PORTS */ + outsw(data_reg, buffer, wcount<<1); + } +} + +/* + * The following routines are mainly used by the ATAPI drivers. + * + * These routines will round up any request for an odd number of bytes, + * so if an odd bytecount is specified, be sure that there's at least one + * extra byte allocated for the buffer. + */ +void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount) +{ + ++bytecount; + ide_input_data (drive, buffer, bytecount / 4); + if ((bytecount & 0x03) >= 2) + insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1); +} + +void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount) +{ + ++bytecount; + ide_output_data (drive, buffer, bytecount / 4); + if ((bytecount & 0x03) >= 2) + outsw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1); +} + +/* + * This should get invoked any time we exit the driver to + * wait for an interrupt response from a drive. handler() points + * at the appropriate code to handle the next interrupt, and a + * timer is started to prevent us from waiting forever in case + * something goes wrong (see the timer_expiry() handler later on). + */ +void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout) +{ + ide_hwgroup_t *hwgroup = HWGROUP(drive); +#ifdef DEBUG + if (hwgroup->handler != NULL) { + printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n", + drive->name, hwgroup->handler, handler); + } +#endif + hwgroup->handler = handler; + hwgroup->timer.expires = jiffies + timeout; + add_timer(&(hwgroup->timer)); +} + +/* + * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" + * value for this drive (from its reported identification information). + * + * Returns: 1 if lba_capacity looks sensible + * 0 otherwise + */ +static int lba_capacity_is_ok (struct hd_driveid *id) +{ + unsigned long lba_sects = id->lba_capacity; + unsigned long chs_sects = id->cyls * id->heads * id->sectors; + unsigned long _10_percent = chs_sects / 10; + + /* very large drives (8GB+) may lie about the number of cylinders */ + if (id->cyls == 16383 && id->heads == 16 && id->sectors == 63 && lba_sects > chs_sects) { + id->cyls = lba_sects / (16 * 63); /* correct cyls */ + return 1; /* lba_capacity is our only option */ + } + /* perform a rough sanity check on lba_sects: within 10% is "okay" */ + if ((lba_sects - chs_sects) < _10_percent) + return 1; /* lba_capacity is good */ + + /* some drives have the word order reversed */ + lba_sects = (lba_sects << 16) | (lba_sects >> 16); + if ((lba_sects - chs_sects) < _10_percent) { + id->lba_capacity = lba_sects; /* fix it */ + return 1; /* lba_capacity is (now) good */ + } + return 0; /* lba_capacity value is bad */ +} + +/* + * current_capacity() returns the capacity (in sectors) of a drive + * according to its current geometry/LBA settings. + */ +static unsigned long current_capacity (ide_drive_t *drive) +{ + struct hd_driveid *id = drive->id; + unsigned long capacity = drive->cyl * drive->head * drive->sect; + + if (!drive->present) + return 0; +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->media == ide_floppy) + return idefloppy_capacity(drive); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ + if (drive->media != ide_disk) + return 0x7fffffff; /* cdrom or tape */ + drive->select.b.lba = 0; + /* Determine capacity, and use LBA if the drive properly supports it */ + if (id != NULL && (id->capability & 2) && lba_capacity_is_ok(id)) { + if (id->lba_capacity >= capacity) { + drive->cyl = id->lba_capacity / (drive->head * drive->sect); + capacity = id->lba_capacity; + drive->select.b.lba = 1; + } + } + return (capacity - drive->sect0); +} + +/* + * ide_geninit() is called exactly *once* for each major, from genhd.c, + * at the beginning of the initial partition check for the drives. + */ +static void ide_geninit (struct gendisk *gd) +{ + unsigned int unit; + ide_hwif_t *hwif = gd->real_devices; + + for (unit = 0; unit < gd->nr_real; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->present && drive->media == ide_cdrom) + ide_cdrom_setup(drive); +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->present && drive->media == ide_tape) + idetape_setup(drive); +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->present && drive->media == ide_floppy) + idefloppy_setup(drive); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ + drive->part[0].nr_sects = current_capacity(drive); + if (!drive->present || (drive->media != ide_disk && drive->media != ide_floppy) || + !drive->part[0].nr_sects) { + drive->part[0].start_sect = -1; /* skip partition check */ + } + } +} + +/* + * init_gendisk() (as opposed to ide_geninit) is called for each major device, + * after probing for drives, to allocate partition tables and other data + * structures needed for the routines in genhd.c. ide_geninit() gets called + * somewhat later, during the partition check. + */ +static void init_gendisk (ide_hwif_t *hwif) +{ + struct gendisk *gd, **gdp; + unsigned int unit, units, minors; + int *bs; + + /* figure out maximum drive number on the interface */ + for (units = MAX_DRIVES; units > 0; --units) { + if (hwif->drives[units-1].present) + break; + } + minors = units * (1<<PARTN_BITS); + gd = kmalloc (sizeof(struct gendisk), GFP_KERNEL); + gd->sizes = kmalloc (minors * sizeof(int), GFP_KERNEL); + gd->part = kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL); + bs = kmalloc (minors*sizeof(int), GFP_KERNEL); + + memset(gd->part, 0, minors * sizeof(struct hd_struct)); + + /* cdroms and msdos f/s are examples of non-1024 blocksizes */ + blksize_size[hwif->major] = bs; + for (unit = 0; unit < minors; ++unit) + *bs++ = BLOCK_SIZE; + + for (unit = 0; unit < units; ++unit) + hwif->drives[unit].part = &gd->part[unit << PARTN_BITS]; + + gd->major = hwif->major; /* our major device number */ + gd->major_name = IDE_MAJOR_NAME; /* treated special in genhd.c */ + gd->minor_shift = PARTN_BITS; /* num bits for partitions */ + gd->max_p = 1<<PARTN_BITS; /* 1 + max partitions / drive */ + gd->max_nr = units; /* max num real drives */ + gd->nr_real = units; /* current num real drives */ + gd->init = ide_geninit; /* initialization function */ + gd->real_devices= hwif; /* ptr to internal data */ + gd->next = NULL; /* linked list of major devs */ + + for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ; + hwif->gd = *gdp = gd; /* link onto tail of list */ +} + +static void do_reset1 (ide_drive_t *, int); /* needed below */ + +#ifdef CONFIG_BLK_DEV_IDEATAPI +/* + * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms + * during an atapi drive reset operation. If the drive has not yet responded, + * and we have not yet hit our maximum waiting time, then the timer is restarted + * for another 50ms. + */ +static void atapi_reset_pollfunc (ide_drive_t *drive) +{ + ide_hwgroup_t *hwgroup = HWGROUP(drive); + byte stat; + + OUT_BYTE (drive->select.all, IDE_SELECT_REG); + udelay (10); + + if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) { + printk("%s: ATAPI reset complete\n", drive->name); + } else { + if (jiffies < hwgroup->poll_timeout) { + ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20); + return; /* continue polling */ + } + hwgroup->poll_timeout = 0; /* end of polling */ + printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat); + do_reset1 (drive, 1); /* do it the old fashioned way */ + return; + } + hwgroup->poll_timeout = 0; /* done polling */ +} +#endif /* CONFIG_BLK_DEV_IDEATAPI */ + +/* + * reset_pollfunc() gets invoked to poll the interface for completion every 50ms + * during an ide reset operation. If the drives have not yet responded, + * and we have not yet hit our maximum waiting time, then the timer is restarted + * for another 50ms. + */ +static void reset_pollfunc (ide_drive_t *drive) +{ + ide_hwgroup_t *hwgroup = HWGROUP(drive); + ide_hwif_t *hwif = HWIF(drive); + byte tmp; + + if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) { + if (jiffies < hwgroup->poll_timeout) { + ide_set_handler (drive, &reset_pollfunc, HZ/20); + return; /* continue polling */ + } + printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); + } else { + printk("%s: reset: ", hwif->name); + if ((tmp = GET_ERR()) == 1) + printk("success\n"); + else { +#if FANCY_STATUS_DUMPS + printk("master: "); + switch (tmp & 0x7f) { + case 1: printk("passed"); + break; + case 2: printk("formatter device error"); + break; + case 3: printk("sector buffer error"); + break; + case 4: printk("ECC circuitry error"); + break; + case 5: printk("controlling MPU error"); + break; + default:printk("error (0x%02x?)", tmp); + } + if (tmp & 0x80) + printk("; slave: failed"); + printk("\n"); +#else + printk("failed\n"); +#endif /* FANCY_STATUS_DUMPS */ + } + } + hwgroup->poll_timeout = 0; /* done polling */ +} + +/* + * do_reset1() attempts to recover a confused drive by resetting it. + * Unfortunately, resetting a disk drive actually resets all devices on + * the same interface, so it can really be thought of as resetting the + * interface rather than resetting the drive. + * + * ATAPI devices have their own reset mechanism which allows them to be + * individually reset without clobbering other devices on the same interface. + * + * Unfortunately, the IDE interface does not generate an interrupt to let + * us know when the reset operation has finished, so we must poll for this. + * Equally poor, though, is the fact that this may a very long time to complete, + * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, + * we set a timer to poll at 50ms intervals. + */ +static void do_reset1 (ide_drive_t *drive, int do_not_try_atapi) +{ + unsigned int unit; + unsigned long flags; + ide_hwif_t *hwif = HWIF(drive); + ide_hwgroup_t *hwgroup = HWGROUP(drive); + + save_flags(flags); + cli(); /* Why ? */ + +#ifdef CONFIG_BLK_DEV_IDEATAPI + /* For an ATAPI device, first try an ATAPI SRST. */ + if (drive->media != ide_disk) { + if (!do_not_try_atapi) { + if (!drive->keep_settings) { + drive->unmask = 0; + drive->io_32bit = 0; + } + OUT_BYTE (drive->select.all, IDE_SELECT_REG); + udelay (20); + OUT_BYTE (WIN_SRST, IDE_COMMAND_REG); + hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; + ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20); + restore_flags (flags); + return; + } + } +#endif /* CONFIG_BLK_DEV_IDEATAPI */ + + /* + * First, reset any device state data we were maintaining + * for any of the drives on this interface. + */ + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *rdrive = &hwif->drives[unit]; +#ifdef CONFIG_BLK_DEV_IDETAPE + if (rdrive->media == ide_tape) + rdrive->tape.reset_issued = 1; +#endif /* CONFIG_BLK_DEV_IDETAPE */ + rdrive->special.all = 0; + rdrive->special.b.set_geometry = 1; + rdrive->special.b.recalibrate = 1; + if (OK_TO_RESET_CONTROLLER) + rdrive->mult_count = 0; + if (!rdrive->keep_settings) { + rdrive->mult_req = 0; + rdrive->unmask = 0; + rdrive->io_32bit = 0; + if (rdrive->using_dma) { + rdrive->using_dma = 0; + printk("%s: disabled DMA\n", rdrive->name); + } + } + if (rdrive->mult_req != rdrive->mult_count) + rdrive->special.b.set_multmode = 1; + } + +#if OK_TO_RESET_CONTROLLER + /* + * Note that we also set nIEN while resetting the device, + * to mask unwanted interrupts from the interface during the reset. + * However, due to the design of PC hardware, this will cause an + * immediate interrupt due to the edge transition it produces. + * This single interrupt gives us a "fast poll" for drives that + * recover from reset very quickly, saving us the first 50ms wait time. + */ + OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG); /* set SRST and nIEN */ + udelay(10); /* more than enough time */ + OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* clear SRST, leave nIEN */ + udelay(10); /* more than enough time */ + hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; + ide_set_handler (drive, &reset_pollfunc, HZ/20); +#endif /* OK_TO_RESET_CONTROLLER */ + + restore_flags (flags); +} + +/* + * ide_do_reset() is the entry point to the drive/interface reset code. + */ +void ide_do_reset (ide_drive_t *drive) +{ + do_reset1 (drive, 0); +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->media == ide_tape) + drive->tape.reset_issued=1; +#endif /* CONFIG_BLK_DEV_IDETAPE */ +} + +/* + * Clean up after success/failure of an explicit drive cmd + */ +void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err) +{ + unsigned long flags; + struct request *rq = HWGROUP(drive)->rq; + + if (rq->cmd == IDE_DRIVE_CMD) { + byte *args = (byte *) rq->buffer; + rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT); + if (args) { + args[0] = stat; + args[1] = err; + args[2] = IN_BYTE(IDE_NSECTOR_REG); + } + } + save_flags(flags); + cli(); + blk_dev[MAJOR(rq->rq_dev)].current_request = rq->next; + HWGROUP(drive)->rq = NULL; + rq->rq_status = RQ_INACTIVE; + if (rq->sem != NULL) + up(rq->sem); + restore_flags(flags); +} + +/* + * Error reporting, in human readable form (luxurious, but a memory hog). + */ +byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat) +{ + unsigned long flags; + byte err = 0; + + save_flags (flags); + sti(); + printk("%s: %s: status=0x%02x", drive->name, msg, stat); +#if FANCY_STATUS_DUMPS + if (drive->media == ide_disk) { + printk(" { "); + if (stat & BUSY_STAT) + printk("Busy "); + else { + if (stat & READY_STAT) printk("DriveReady "); + if (stat & WRERR_STAT) printk("DeviceFault "); + if (stat & SEEK_STAT) printk("SeekComplete "); + if (stat & DRQ_STAT) printk("DataRequest "); + if (stat & ECC_STAT) printk("CorrectedError "); + if (stat & INDEX_STAT) printk("Index "); + if (stat & ERR_STAT) printk("Error "); + } + printk("}"); + } +#endif /* FANCY_STATUS_DUMPS */ + printk("\n"); + if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) { + err = GET_ERR(); + printk("%s: %s: error=0x%02x", drive->name, msg, err); +#if FANCY_STATUS_DUMPS + if (drive->media == ide_disk) { + printk(" { "); + if (err & ICRC_ERR) printk((err & ABRT_ERR) ? "BadCRC " : "BadSector "); + if (err & ECC_ERR) printk("UncorrectableError "); + if (err & ID_ERR) printk("SectorIdNotFound "); + if (err & ABRT_ERR) printk("DriveStatusError "); + if (err & TRK0_ERR) printk("TrackZeroNotFound "); + if (err & MARK_ERR) printk("AddrMarkNotFound "); + printk("}"); + if (err & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) { + byte cur = IN_BYTE(IDE_SELECT_REG); + if (cur & 0x40) { /* using LBA? */ + printk(", LBAsect=%ld", (unsigned long) + ((cur&0xf)<<24) + |(IN_BYTE(IDE_HCYL_REG)<<16) + |(IN_BYTE(IDE_LCYL_REG)<<8) + | IN_BYTE(IDE_SECTOR_REG)); + } else { + printk(", CHS=%d/%d/%d", + (IN_BYTE(IDE_HCYL_REG)<<8) + + IN_BYTE(IDE_LCYL_REG), + cur & 0xf, + IN_BYTE(IDE_SECTOR_REG)); + } + if (HWGROUP(drive)->rq) + printk(", sector=%ld", HWGROUP(drive)->rq->sector); + } + } +#endif /* FANCY_STATUS_DUMPS */ + printk("\n"); + } + restore_flags (flags); + return err; +} + +/* + * try_to_flush_leftover_data() is invoked in response to a drive + * unexpectedly having its DRQ_STAT bit set. As an alternative to + * resetting the drive, this routine tries to clear the condition + * by read a sector's worth of data from the drive. Of course, + * this may not help if the drive is *waiting* for data from *us*. + */ +static void try_to_flush_leftover_data (ide_drive_t *drive) +{ + int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS; + + while (i > 0) { + unsigned long buffer[16]; + unsigned int wcount = (i > 16) ? 16 : i; + i -= wcount; + ide_input_data (drive, buffer, wcount); + } +} + +/* + * ide_error() takes action based on the error returned by the controller. + */ +void ide_error (ide_drive_t *drive, const char *msg, byte stat) +{ + struct request *rq; + byte err; + + err = ide_dump_status(drive, msg, stat); + if ((rq = HWGROUP(drive)->rq) == NULL || drive == NULL) + return; + /* retry only "normal" I/O: */ + if (rq->cmd == IDE_DRIVE_CMD) { + rq->errors = 1; + ide_end_drive_cmd(drive, stat, err); + return; + } + if (stat & BUSY_STAT) { /* other bits are useless when BUSY */ + rq->errors |= ERROR_RESET; + } else { + if (drive->media == ide_disk && (stat & ERR_STAT)) { + /* err has different meaning on cdrom and tape */ + if (err == ABRT_ERR) { + if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY) + return; /* some newer drives don't support WIN_SPECIFY */ + } else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR)) + ; /* UDMA crc error -- just retry the operation */ + else if (err & (BBD_ERR | ECC_ERR)) /* retries won't help these */ + rq->errors = ERROR_MAX; + else if (err & TRK0_ERR) /* help it find track zero */ + rq->errors |= ERROR_RECAL; + else if (err & MC_ERR) + drive->special.b.mc = 1; + } + if ((stat & DRQ_STAT) && rq->cmd != WRITE) + try_to_flush_leftover_data(drive); + } + if (GET_STAT() & (BUSY_STAT|DRQ_STAT)) + rq->errors |= ERROR_RESET; /* Mmmm.. timing problem */ + + if (rq->errors >= ERROR_MAX) { +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->media == ide_tape) { + rq->errors = 0; + idetape_end_request(0, HWGROUP(drive)); + } else +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->media == ide_floppy) { + rq->errors = 0; + idefloppy_end_request(0, HWGROUP(drive)); + } else +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + if (drive->media == ide_scsi) { + rq->errors = 0; + idescsi_end_request(0, HWGROUP(drive)); + } else +#endif /* CONFIG_BLK_DEV_IDESCSI */ + ide_end_request(0, HWGROUP(drive)); + } + else { + if ((rq->errors & ERROR_RESET) == ERROR_RESET) { + ++rq->errors; + ide_do_reset(drive); + return; + } else if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) + drive->special.b.recalibrate = 1; + ++rq->errors; + } +} + +/* + * read_intr() is the handler for disk read/multread interrupts + */ +static void read_intr (ide_drive_t *drive) +{ + byte stat; + int i; + unsigned int msect, nsect; + struct request *rq; + + if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) { + ide_error(drive, "read_intr", stat); + return; + } + msect = drive->mult_count; +read_next: + rq = HWGROUP(drive)->rq; + if (msect) { + if ((nsect = rq->current_nr_sectors) > msect) + nsect = msect; + msect -= nsect; + } else + nsect = 1; + ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS); +#ifdef DEBUG + printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n", + drive->name, rq->sector, rq->sector+nsect-1, + (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect); +#endif + rq->sector += nsect; + rq->buffer += nsect<<9; + rq->errors = 0; + i = (rq->nr_sectors -= nsect); + if ((rq->current_nr_sectors -= nsect) <= 0) + ide_end_request(1, HWGROUP(drive)); + if (i > 0) { + if (msect) + goto read_next; + ide_set_handler (drive, &read_intr, WAIT_CMD); + } +} + +/* + * write_intr() is the handler for disk write interrupts + */ +static void write_intr (ide_drive_t *drive) +{ + byte stat; + int i; + ide_hwgroup_t *hwgroup = HWGROUP(drive); + struct request *rq = hwgroup->rq; + + if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) { +#ifdef DEBUG + printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n", + drive->name, rq->sector, (unsigned long) rq->buffer, + rq->nr_sectors-1); +#endif + if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) { + rq->sector++; + rq->buffer += 512; + rq->errors = 0; + i = --rq->nr_sectors; + --rq->current_nr_sectors; + if (rq->current_nr_sectors <= 0) + ide_end_request(1, hwgroup); + if (i > 0) { + ide_output_data (drive, rq->buffer, SECTOR_WORDS); + ide_set_handler (drive, &write_intr, WAIT_CMD); + } + return; + } + } + ide_error(drive, "write_intr", stat); +} + +/* + * ide_multwrite() transfers a block of up to mcount sectors of data + * to a drive as part of a disk multiple-sector write operation. + */ +void ide_multwrite (ide_drive_t *drive, unsigned int mcount) +{ + struct request *rq = &HWGROUP(drive)->wrq; + + do { + unsigned int nsect = rq->current_nr_sectors; + if (nsect > mcount) + nsect = mcount; + mcount -= nsect; + + ide_output_data(drive, rq->buffer, nsect<<7); +#ifdef DEBUG + printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n", + drive->name, rq->sector, (unsigned long) rq->buffer, + nsect, rq->nr_sectors - nsect); +#endif + if ((rq->nr_sectors -= nsect) <= 0) + break; + if ((rq->current_nr_sectors -= nsect) == 0) { + if ((rq->bh = rq->bh->b_reqnext) != NULL) { + rq->current_nr_sectors = rq->bh->b_size>>9; + rq->buffer = rq->bh->b_data; + } else { + panic("%s: buffer list corrupted\n", drive->name); + break; + } + } else { + rq->buffer += nsect << 9; + } + } while (mcount); +} + +/* + * multwrite_intr() is the handler for disk multwrite interrupts + */ +static void multwrite_intr (ide_drive_t *drive) +{ + byte stat; + int i; + ide_hwgroup_t *hwgroup = HWGROUP(drive); + struct request *rq = &hwgroup->wrq; + + if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) { + if (stat & DRQ_STAT) { + if (rq->nr_sectors) { + ide_multwrite(drive, drive->mult_count); + ide_set_handler (drive, &multwrite_intr, WAIT_CMD); + return; + } + } else { + if (!rq->nr_sectors) { /* all done? */ + rq = hwgroup->rq; + for (i = rq->nr_sectors; i > 0;){ + i -= rq->current_nr_sectors; + ide_end_request(1, hwgroup); + } + return; + } + } + } + ide_error(drive, "multwrite_intr", stat); +} + +/* + * Issue a simple drive command + * The drive must be selected beforehand. + */ +static void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler) +{ + ide_set_handler (drive, handler, WAIT_CMD); + OUT_BYTE(drive->ctl,IDE_CONTROL_REG); + OUT_BYTE(nsect,IDE_NSECTOR_REG); + OUT_BYTE(cmd,IDE_COMMAND_REG); +} + +/* + * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. + */ +static void set_multmode_intr (ide_drive_t *drive) +{ + byte stat = GET_STAT(); + + sti(); + if (OK_STAT(stat,READY_STAT,BAD_STAT)) { + drive->mult_count = drive->mult_req; + } else { + drive->mult_req = drive->mult_count = 0; + drive->special.b.recalibrate = 1; + (void) ide_dump_status(drive, "set_multmode", stat); + } +} + +/* + * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. + */ +static void set_geometry_intr (ide_drive_t *drive) +{ + byte stat = GET_STAT(); + + sti(); + if (!OK_STAT(stat,READY_STAT,BAD_STAT)) + ide_error(drive, "set_geometry_intr", stat); +} + +/* + * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. + */ +static void recal_intr (ide_drive_t *drive) +{ + byte stat = GET_STAT(); + + sti(); + if (!OK_STAT(stat,READY_STAT,BAD_STAT)) + ide_error(drive, "recal_intr", stat); +} + +/* + * mc_intr() is invoked on completion of a WIN_ACKMC cmd. + */ +static void mc_intr (ide_drive_t *drive) +{ + byte stat = GET_STAT(); + + sti(); + if (!OK_STAT(stat,READY_STAT,BAD_STAT)) + ide_error(drive, "mc_intr", stat); + drive->special.b.mc = 0; +} + +/* + * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD. + */ +static void drive_cmd_intr (ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + byte *args = (byte *) rq->buffer; + byte stat = GET_STAT(); + + sti(); + if ((stat & DRQ_STAT) && args && args[3]) { + byte io_32bit = drive->io_32bit; + drive->io_32bit = 0; + ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS); + drive->io_32bit = io_32bit; + stat = GET_STAT(); + } + if (OK_STAT(stat,READY_STAT,BAD_STAT)) + ide_end_drive_cmd (drive, stat, GET_ERR()); + else + ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */ +} + +/* + * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT + * commands to a drive. It used to do much more, but has been scaled back. + */ +static inline void do_special (ide_drive_t *drive) +{ + special_t *s = &drive->special; + +#ifdef DEBUG + printk("%s: do_special: 0x%02x\n", drive->name, s->all); +#endif + if (s->b.set_geometry) { + s->b.set_geometry = 0; + if (drive->media == ide_disk && !drive->no_geom) { + OUT_BYTE(drive->sect,IDE_SECTOR_REG); + OUT_BYTE(drive->cyl,IDE_LCYL_REG); + OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG); + OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG); + if (!IS_PROMISE_DRIVE) + ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr); + } + } else if (s->b.recalibrate) { + s->b.recalibrate = 0; + if (drive->media == ide_disk && !IS_PROMISE_DRIVE) + ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr); + } else if (s->b.set_tune) { + ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc; + s->b.set_tune = 0; + if (tuneproc != NULL) + tuneproc(drive, drive->tune_req); + } else if (s->b.set_multmode) { + s->b.set_multmode = 0; + if (drive->media == ide_disk) { + if (drive->id && drive->mult_req > drive->id->max_multsect) + drive->mult_req = drive->id->max_multsect; + if (!IS_PROMISE_DRIVE) + ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr); + } else + drive->mult_req = 0; + } else if (s->b.mc) { + s->b.mc = 0; + if (drive->media == ide_disk && !IS_PROMISE_DRIVE) + ide_cmd(drive, WIN_ACKMC, drive->sect, &mc_intr); + } else if (s->all) { + int special = s->all; + s->all = 0; + printk("%s: bad special flag: 0x%02x\n", drive->name, special); + } +} + +/* + * This routine busy-waits for the drive status to be not "busy". + * It then checks the status for all of the "good" bits and none + * of the "bad" bits, and if all is okay it returns 0. All other + * cases return 1 after invoking ide_error() -- caller should just return. + * + * This routine should get fixed to not hog the cpu during extra long waits.. + * That could be done by busy-waiting for the first jiffy or two, and then + * setting a timer to wake up at half second intervals thereafter, + * until timeout is achieved, before timing out. + */ +int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout) +{ + byte stat; + unsigned long flags; + + udelay(1); /* spec allows drive 400ns to assert "BUSY" */ + if ((stat = GET_STAT()) & BUSY_STAT) { + save_flags(flags); + sti(); + timeout += jiffies; + while ((stat = GET_STAT()) & BUSY_STAT) { + if (jiffies > timeout) { + restore_flags(flags); + ide_error(drive, "status timeout", stat); + return 1; + } + } + restore_flags(flags); + } + udelay(1); /* allow status to settle, then read it again */ + if (OK_STAT((stat = GET_STAT()), good, bad)) + return 0; + ide_error(drive, "status error", stat); + return 1; +} + +/* + * do_rw_disk() issues READ and WRITE commands to a disk, + * using LBA if supported, or CHS otherwise, to address sectors. + * It also takes care of issuing special DRIVE_CMDs. + */ +static inline void do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block) +{ + ide_hwif_t *hwif = HWIF(drive); + unsigned short io_base = hwif->io_base; +#ifdef CONFIG_BLK_DEV_PROMISE + int use_promise_io = 0; +#endif /* CONFIG_BLK_DEV_PROMISE */ + + OUT_BYTE(drive->ctl,IDE_CONTROL_REG); + OUT_BYTE(rq->nr_sectors,io_base+IDE_NSECTOR_OFFSET); +#ifdef CONFIG_BLK_DEV_PROMISE + if (IS_PROMISE_DRIVE) { + if (hwif->is_promise2 || rq->cmd == READ) { + use_promise_io = 1; + } + } + if (drive->select.b.lba || use_promise_io) { +#else /* !CONFIG_BLK_DEV_PROMISE */ + if (drive->select.b.lba) { +#endif /* CONFIG_BLK_DEV_PROMISE */ +#ifdef DEBUG + printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n", + drive->name, (rq->cmd==READ)?"read":"writ", + block, rq->nr_sectors, (unsigned long) rq->buffer); +#endif + OUT_BYTE(block,io_base+IDE_SECTOR_OFFSET); + OUT_BYTE(block>>=8,io_base+IDE_LCYL_OFFSET); + OUT_BYTE(block>>=8,io_base+IDE_HCYL_OFFSET); + OUT_BYTE(((block>>8)&0x0f)|drive->select.all,io_base+IDE_SELECT_OFFSET); + } else { + unsigned int sect,head,cyl,track; + track = block / drive->sect; + sect = block % drive->sect + 1; + OUT_BYTE(sect,io_base+IDE_SECTOR_OFFSET); + head = track % drive->head; + cyl = track / drive->head; + OUT_BYTE(cyl,io_base+IDE_LCYL_OFFSET); + OUT_BYTE(cyl>>8,io_base+IDE_HCYL_OFFSET); + OUT_BYTE(head|drive->select.all,io_base+IDE_SELECT_OFFSET); +#ifdef DEBUG + printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n", + drive->name, (rq->cmd==READ)?"read":"writ", cyl, + head, sect, rq->nr_sectors, (unsigned long) rq->buffer); +#endif + } +#ifdef CONFIG_BLK_DEV_PROMISE + if (use_promise_io) { + do_promise_io (drive, rq); + return; + } +#endif /* CONFIG_BLK_DEV_PROMISE */ + if (rq->cmd == READ) { +#ifdef CONFIG_BLK_DEV_TRITON + if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive))) + return; +#endif /* CONFIG_BLK_DEV_TRITON */ + ide_set_handler(drive, &read_intr, WAIT_CMD); + OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, io_base+IDE_COMMAND_OFFSET); + return; + } + if (rq->cmd == WRITE) { +#ifdef CONFIG_BLK_DEV_TRITON + if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive))) + return; +#endif /* CONFIG_BLK_DEV_TRITON */ + OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, io_base+IDE_COMMAND_OFFSET); + if (ide_wait_stat(drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) { + printk("%s: no DRQ after issuing %s\n", drive->name, + drive->mult_count ? "MULTWRITE" : "WRITE"); + return; + } + if (!drive->unmask) + cli(); + if (drive->mult_count) { + HWGROUP(drive)->wrq = *rq; /* scratchpad */ + ide_set_handler (drive, &multwrite_intr, WAIT_CMD); + ide_multwrite(drive, drive->mult_count); + } else { + ide_set_handler (drive, &write_intr, WAIT_CMD); + ide_output_data(drive, rq->buffer, SECTOR_WORDS); + } + return; + } + printk("%s: bad command: %d\n", drive->name, rq->cmd); + ide_end_request(0, HWGROUP(drive)); +} + +/* + * execute_drive_cmd() issues a special drive command, + * usually initiated by ioctl() from the external hdparm program. + */ +static void execute_drive_cmd (ide_drive_t *drive, struct request *rq) +{ + byte *args = rq->buffer; + if (args) { +#ifdef DEBUG + printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n", + drive->name, args[0], args[1], args[2], args[3]); +#endif + OUT_BYTE(args[2],IDE_FEATURE_REG); + ide_cmd(drive, args[0], args[1], &drive_cmd_intr); + return; + } else { + /* + * NULL is actually a valid way of waiting for + * all current requests to be flushed from the queue. + */ +#ifdef DEBUG + printk("%s: DRIVE_CMD (null)\n", drive->name); +#endif + ide_end_drive_cmd(drive, GET_STAT(), GET_ERR()); + return; + } +} + +/* + * do_request() initiates handling of a new I/O request + */ +static inline void do_request (ide_hwif_t *hwif, struct request *rq) +{ + unsigned int minor, unit; + unsigned long block, blockend; + ide_drive_t *drive; + + sti(); +#ifdef DEBUG + printk("%s: do_request: current=0x%08lx\n", hwif->name, (unsigned long) rq); +#endif + minor = MINOR(rq->rq_dev); + unit = minor >> PARTN_BITS; + if (MAJOR(rq->rq_dev) != hwif->major || unit >= MAX_DRIVES) { + printk("%s: bad device number: %s\n", + hwif->name, kdevname(rq->rq_dev)); + goto kill_rq; + } + drive = &hwif->drives[unit]; +#ifdef DEBUG + if (rq->bh && !buffer_locked(rq->bh)) { + printk("%s: block not locked\n", drive->name); + goto kill_rq; + } +#endif + block = rq->sector; + blockend = block + rq->nr_sectors; + if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) { + printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name, + (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ', block, rq->nr_sectors); + goto kill_rq; + } + block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0; +#if FAKE_FDISK_FOR_EZDRIVE + if (block == 0 && drive->remap_0_to_1) + block = 1; /* redirect MBR access to EZ-Drive partn table */ +#endif /* FAKE_FDISK_FOR_EZDRIVE */ + ((ide_hwgroup_t *)hwif->hwgroup)->drive = drive; +#if (DISK_RECOVERY_TIME > 0) + while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME); +#endif + +#ifdef CONFIG_BLK_DEV_IDETAPE + POLL_HWIF_TAPE_DRIVE; /* macro from ide-tape.h */ +#endif /* CONFIG_BLK_DEV_IDETAPE */ + + SELECT_DRIVE(hwif,drive); + if (ide_wait_stat(drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) { + printk("%s: drive not ready for command\n", drive->name); + return; + } + + if (!drive->special.all) { + if (rq->cmd == IDE_DRIVE_CMD) { + execute_drive_cmd(drive, rq); + return; + } +#ifdef CONFIG_BLK_DEV_IDEATAPI + switch (drive->media) { + case ide_disk: + do_rw_disk (drive, rq, block); + return; +#ifdef CONFIG_BLK_DEV_IDECD + case ide_cdrom: + ide_do_rw_cdrom (drive, block); + return; +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + case ide_tape: + idetape_do_request (drive, rq, block); + return; +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + case ide_floppy: + idefloppy_do_request (drive, rq, block); + return; +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + case ide_scsi: + idescsi_do_request (drive, rq, block); + return; +#endif /* CONFIG_BLK_DEV_IDESCSI */ + + default: + printk("%s: media type %d not supported\n", + drive->name, drive->media); + goto kill_rq; + } +#else + do_rw_disk (drive, rq, block); /* simpler and faster */ + return; +#endif /* CONFIG_BLK_DEV_IDEATAPI */; + } + do_special(drive); + return; +kill_rq: + ide_end_request(0, hwif->hwgroup); +} + +/* + * The driver enables interrupts as much as possible. In order to do this, + * (a) the device-interrupt is always masked before entry, and + * (b) the timeout-interrupt is always disabled before entry. + * + * If we enter here from, say irq14, and then start a new request for irq15, + * (possible with "serialize" option) then we cannot ensure that we exit + * before the irq15 hits us. So, we must be careful not to let this bother us. + * + * Interrupts are still masked (by default) whenever we are exchanging + * data/cmds with a drive, because some drives seem to have very poor + * tolerance for latency during I/O. For devices which don't suffer from + * this problem (most don't), the unmask flag can be set using the "hdparm" + * utility, to permit other interrupts during data/cmd transfers. + */ +void ide_do_request (ide_hwgroup_t *hwgroup) +{ + cli(); /* paranoia */ + if (hwgroup->handler != NULL) { + printk("%s: EEeekk!! handler not NULL in ide_do_request()\n", hwgroup->hwif->name); + return; + } + do { + ide_hwif_t *hwif = hwgroup->hwif; + struct request *rq; + if ((rq = hwgroup->rq) == NULL) { + if (hwif->sharing_irq && hwgroup->drive) /* set nIEN */ + OUT_BYTE(hwgroup->drive->ctl|2,hwif->ctl_port); + /* + * hwgroup->next_hwif is different from hwgroup->hwif + * only when a request is inserted using "ide_next". + * This saves wear and tear on IDE tapes. + */ + hwif = hwgroup->next_hwif; + do { + rq = blk_dev[hwif->major].current_request; + if (rq != NULL && rq->rq_status != RQ_INACTIVE) + goto got_rq; + } while ((hwif = hwif->next) != hwgroup->next_hwif); + hwgroup->active = 0; + return; /* no work left for this hwgroup */ + } + got_rq: + do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq); + cli(); + } while (hwgroup->handler == NULL); +} + +/* + * do_hwgroup_request() invokes ide_do_request() after first masking + * all possible interrupts for the current hwgroup. This prevents race + * conditions in the event that an unexpected interrupt occurs while + * we are in the driver. + * + * Note that when an interrupt is used to reenter the driver, the first level + * handler will already have masked the irq that triggered, but any other ones + * for the hwgroup will still be unmasked. The driver tries to be careful + * about such things. + */ +static void do_hwgroup_request (ide_hwgroup_t *hwgroup) +{ + if (hwgroup->handler == NULL) { + ide_hwif_t *hgif = hwgroup->hwif; + ide_hwif_t *hwif = hgif; + hwgroup->active = 1; + do { + disable_irq(hwif->irq); + } while ((hwif = hwif->next) != hgif); + ide_do_request (hwgroup); + do { + enable_irq(hwif->irq); + } while ((hwif = hwif->next) != hgif); + } +} + +static void do_ide0_request (void) /* invoked with cli() */ +{ + do_hwgroup_request (ide_hwifs[0].hwgroup); +} + +#if MAX_HWIFS > 1 +static void do_ide1_request (void) /* invoked with cli() */ +{ + do_hwgroup_request (ide_hwifs[1].hwgroup); +} +#endif + +#if MAX_HWIFS > 2 +static void do_ide2_request (void) /* invoked with cli() */ +{ + do_hwgroup_request (ide_hwifs[2].hwgroup); +} +#endif + +#if MAX_HWIFS > 3 +static void do_ide3_request (void) /* invoked with cli() */ +{ + do_hwgroup_request (ide_hwifs[3].hwgroup); +} +#endif + +static void timer_expiry (unsigned long data) +{ + ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data; + ide_drive_t *drive = hwgroup->drive; + unsigned long flags; + + save_flags(flags); + cli(); + + if (hwgroup->poll_timeout != 0) { /* polling in progress? */ + ide_handler_t *handler = hwgroup->handler; + hwgroup->handler = NULL; + handler(drive); + } else if (hwgroup->handler == NULL) { /* not waiting for anything? */ + sti(); /* drive must have responded just as the timer expired */ + printk("%s: marginal timeout\n", drive->name); + } else { + hwgroup->handler = NULL; /* abort the operation */ + if (hwgroup->hwif->dmaproc) + (void) hwgroup->hwif->dmaproc (ide_dma_abort, drive); + ide_error(drive, "irq timeout", GET_STAT()); + } + if (hwgroup->handler == NULL) + do_hwgroup_request (hwgroup); + restore_flags(flags); +} + +/* + * There's nothing really useful we can do with an unexpected interrupt, + * other than reading the status register (to clear it), and logging it. + * There should be no way that an irq can happen before we're ready for it, + * so we needn't worry much about losing an "important" interrupt here. + * + * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the + * drive enters "idle", "standby", or "sleep" mode, so if the status looks + * "good", we just ignore the interrupt completely. + * + * This routine assumes cli() is in effect when called. + * + * If an unexpected interrupt happens on irq15 while we are handling irq14 + * and if the two interfaces are "serialized" (CMD640), then it looks like + * we could screw up by interfering with a new request being set up for irq15. + * + * In reality, this is a non-issue. The new command is not sent unless the + * drive is ready to accept one, in which case we know the drive is not + * trying to interrupt us. And ide_set_handler() is always invoked before + * completing the issuance of any new drive command, so we will not be + * accidently invoked as a result of any valid command completion interrupt. + * + */ +static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup) +{ + byte stat; + unsigned int unit; + ide_hwif_t *hwif = hwgroup->hwif; + + /* + * handle the unexpected interrupt + */ + do { + if (hwif->irq == irq) { + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + if (!drive->present) + continue; + SELECT_DRIVE(hwif,drive); + udelay(100); /* Ugly, but wait_stat() may not be safe here */ + if (!OK_STAT(stat=GET_STAT(), drive->ready_stat, BAD_STAT)) { + /* Try to not flood the console with msgs */ + static unsigned long last_msgtime = 0; + if ((last_msgtime + (HZ/2)) < jiffies) { + last_msgtime = jiffies; + (void) ide_dump_status(drive, "unexpected_intr", stat); + } + } + if ((stat & DRQ_STAT)) + try_to_flush_leftover_data(drive); + } + } + } while ((hwif = hwif->next) != hwgroup->hwif); + SELECT_DRIVE(hwif,hwgroup->drive); /* Ugh.. probably interrupts current I/O */ + udelay(100); /* Ugly, but wait_stat() may not be safe here */ +} + +/* + * entry point for all interrupts, caller does cli() for us + */ +void ide_intr (int irq, void *dev_id, struct pt_regs *regs) +{ + ide_hwgroup_t *hwgroup = dev_id; + ide_handler_t *handler; + + if (irq == hwgroup->hwif->irq && (handler = hwgroup->handler) != NULL) { + ide_drive_t *drive = hwgroup->drive; + hwgroup->handler = NULL; + del_timer(&(hwgroup->timer)); + if (drive->unmask) + sti(); + handler(drive); + cli(); /* this is necessary, as next rq may be different irq */ + if (hwgroup->handler == NULL) { + SET_RECOVERY_TIMER(HWIF(drive)); + ide_do_request(hwgroup); + } + } else { + unexpected_intr(irq, hwgroup); + } + cli(); +} + +/* + * get_info_ptr() returns the (ide_drive_t *) for a given device number. + * It returns NULL if the given device number does not match any present drives. + */ +static ide_drive_t *get_info_ptr (kdev_t i_rdev) +{ + int major = MAJOR(i_rdev); + unsigned int h; + + for (h = 0; h < MAX_HWIFS; ++h) { + ide_hwif_t *hwif = &ide_hwifs[h]; + if (hwif->present && major == hwif->major) { + unsigned unit = DEVICE_NR(i_rdev); + if (unit < MAX_DRIVES) { + ide_drive_t *drive = &hwif->drives[unit]; + if (drive->present) + return drive; + } else if (major == IDE0_MAJOR && unit < 4) { + printk("ide: probable bad entry for /dev/hd%c\n", 'a'+unit); + printk("ide: to fix it, run: /usr/src/linux/scripts/MAKEDEV.ide\n"); + } + break; + } + } + return NULL; +} + +/* + * This function is intended to be used prior to invoking ide_do_drive_cmd(). + */ +void ide_init_drive_cmd (struct request *rq) +{ + rq->buffer = NULL; + rq->cmd = IDE_DRIVE_CMD; + rq->sector = 0; + rq->nr_sectors = 0; + rq->current_nr_sectors = 0; + rq->sem = NULL; + rq->bh = NULL; + rq->bhtail = NULL; + rq->next = NULL; + +#if 0 /* these are done each time through ide_do_drive_cmd() */ + rq->errors = 0; + rq->rq_status = RQ_ACTIVE; + rq->rq_dev = ????; +#endif +} + +/* + * This function issues a special IDE device request + * onto the request queue. + * + * If action is ide_wait, then the rq is queued at the end of the + * request queue, and the function sleeps until it has been processed. + * This is for use when invoked from an ioctl handler. + * + * If action is ide_preempt, then the rq is queued at the head of + * the request queue, displacing the currently-being-processed + * request and this function returns immediately without waiting + * for the new rq to be completed. This is VERY DANGEROUS, and is + * intended for careful use by the ATAPI tape/cdrom driver code. + * + * If action is ide_next, then the rq is queued immediately after + * the currently-being-processed-request (if any), and the function + * returns without waiting for the new rq to be completed. As above, + * This is VERY DANGEROUS, and is intended for careful use by the + * ATAPI tape/cdrom driver code. + * + * If action is ide_end, then the rq is queued at the end of the + * request queue, and the function returns immediately without waiting + * for the new rq to be completed. This is again intended for careful + * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c, + * when operating in the pipelined operation mode). + */ +int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action) +{ + unsigned long flags; + unsigned int major = HWIF(drive)->major; + struct request *cur_rq; + struct blk_dev_struct *bdev = &blk_dev[major]; + struct semaphore sem = MUTEX_LOCKED; + + if (IS_PROMISE_DRIVE && rq->buffer != NULL) + return -ENOSYS; /* special drive cmds not supported */ + rq->errors = 0; + rq->rq_status = RQ_ACTIVE; + rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS); + if (action == ide_wait) + rq->sem = &sem; + unplug_device(bdev); + + save_flags(flags); + cli(); + if (action == ide_next) + HWGROUP(drive)->next_hwif = HWIF(drive); + cur_rq = bdev->current_request; + + if (cur_rq == NULL || action == ide_preempt) { + rq->next = cur_rq; + bdev->current_request = rq; + if (action == ide_preempt) + HWGROUP(drive)->rq = NULL; + } else { + if (action == ide_wait || action == ide_end) { + while (cur_rq->next != NULL) /* find end of list */ + cur_rq = cur_rq->next; + } + rq->next = cur_rq->next; + cur_rq->next = rq; + } + if (!HWGROUP(drive)->active) { + do_hwgroup_request(HWGROUP(drive)); + cli(); + } + if (action == ide_wait && rq->rq_status != RQ_INACTIVE) + down(&sem); /* wait for it to be serviced */ + restore_flags(flags); + return rq->errors ? -EIO : 0; /* return -EIO if errors */ +} + +static int ide_open(struct inode * inode, struct file * filp) +{ + ide_drive_t *drive; + unsigned long flags; + + if ((drive = get_info_ptr(inode->i_rdev)) == NULL) + return -ENXIO; + save_flags(flags); + cli(); + while (drive->busy) + sleep_on(&drive->wqueue); + drive->usage++; + restore_flags(flags); +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->media == ide_cdrom) + return ide_cdrom_open (inode, filp, drive); +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->media == ide_tape) + return idetape_blkdev_open (inode, filp, drive); +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->media == ide_floppy) + return idefloppy_open (inode, filp, drive); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + if (drive->media == ide_scsi) + return idescsi_open (inode, filp, drive); +#endif /* CONFIG_BLK_DEV_IDESCSI */ + if (drive->removable && drive->usage == 1) { + byte door_lock[] = {WIN_DOORLOCK,0,0,0}; + struct request rq; + check_disk_change(inode->i_rdev); + ide_init_drive_cmd (&rq); + rq.buffer = door_lock; + /* + * Ignore the return code from door_lock, + * since the open() has already succeeded, + * and the door_lock is irrelevant at this point. + */ + (void) ide_do_drive_cmd(drive, &rq, ide_wait); + } + return 0; +} + +/* + * Releasing a block device means we sync() it, so that it can safely + * be forgotten about... + */ +static void ide_release(struct inode * inode, struct file * file) +{ + ide_drive_t *drive; + + if ((drive = get_info_ptr(inode->i_rdev)) != NULL) { + fsync_dev(inode->i_rdev); + drive->usage--; +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->media == ide_cdrom) { + ide_cdrom_release (inode, file, drive); + return; + } +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->media == ide_tape) { + idetape_blkdev_release (inode, file, drive); + return; + } +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->media == ide_floppy) { + idefloppy_release (inode, file, drive); + return; + } +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + if (drive->media == ide_scsi) { + idescsi_ide_release (inode, file, drive); + return; + } +#endif /* CONFIG_BLK_DEV_IDESCSI */ + if (drive->removable && !drive->usage) { + byte door_unlock[] = {WIN_DOORUNLOCK,0,0,0}; + struct request rq; + invalidate_buffers(inode->i_rdev); + ide_init_drive_cmd (&rq); + rq.buffer = door_unlock; + (void) ide_do_drive_cmd(drive, &rq, ide_wait); + } + } +} + +/* + * This routine is called to flush all partitions and partition tables + * for a changed disk, and then re-read the new partition table. + * If we are revalidating a disk because of a media change, then we + * enter with usage == 0. If we are using an ioctl, we automatically have + * usage == 1 (we need an open channel to use an ioctl :-), so this + * is our limit. + */ +static int revalidate_disk(kdev_t i_rdev) +{ + ide_drive_t *drive; + unsigned int p, major, minor; + long flags; + + if ((drive = get_info_ptr(i_rdev)) == NULL) + return -ENODEV; + + major = MAJOR(i_rdev); + minor = drive->select.b.unit << PARTN_BITS; + save_flags(flags); + cli(); + if (drive->busy || (drive->usage > 1)) { + restore_flags(flags); + return -EBUSY; + }; + drive->busy = 1; + restore_flags(flags); + + for (p = 0; p < (1<<PARTN_BITS); ++p) { + if (drive->part[p].nr_sects > 0) { + kdev_t devp = MKDEV(major, minor+p); + fsync_dev (devp); + invalidate_inodes (devp); + invalidate_buffers (devp); + set_blocksize(devp, 1024); + } + drive->part[p].start_sect = 0; + drive->part[p].nr_sects = 0; + }; + + drive->part[0].nr_sects = current_capacity(drive); + if ((drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects) + drive->part[0].start_sect = -1; + resetup_one_dev(HWIF(drive)->gd, drive->select.b.unit); + + drive->busy = 0; + wake_up(&drive->wqueue); + return 0; +} + +static int write_fs_long (unsigned long useraddr, long value) +{ + int err; + + if (NULL == (long *)useraddr) + return -EINVAL; + if ((err = verify_area(VERIFY_WRITE, (long *)useraddr, sizeof(long)))) + return err; + put_user((unsigned)value, (long *) useraddr); + return 0; +} + +static int ide_ioctl (struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int err; + ide_drive_t *drive; + unsigned long flags; + struct request rq; + + if (!inode || !(inode->i_rdev)) + return -EINVAL; + if ((drive = get_info_ptr(inode->i_rdev)) == NULL) + return -ENODEV; + ide_init_drive_cmd (&rq); + switch (cmd) { + case HDIO_GETGEO: + { + struct hd_geometry *loc = (struct hd_geometry *) arg; + if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL; + err = verify_area(VERIFY_WRITE, loc, sizeof(*loc)); + if (err) return err; + put_user(drive->bios_head, (byte *) &loc->heads); + put_user(drive->bios_sect, (byte *) &loc->sectors); + put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders); + put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect, + (unsigned long *) &loc->start); + return 0; + } + case BLKFLSBUF: + if (!suser()) return -EACCES; + fsync_dev(inode->i_rdev); + invalidate_buffers(inode->i_rdev); + return 0; + + case BLKRASET: + if (!suser()) return -EACCES; + if(arg > 0xff) return -EINVAL; + read_ahead[MAJOR(inode->i_rdev)] = arg; + return 0; + + case BLKRAGET: + return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)]); + + case BLKGETSIZE: /* Return device size */ + return write_fs_long(arg, drive->part[MINOR(inode->i_rdev)&PARTN_MASK].nr_sects); + case BLKRRPART: /* Re-read partition tables */ + if (!suser()) return -EACCES; + return revalidate_disk(inode->i_rdev); + + case HDIO_GET_KEEPSETTINGS: + return write_fs_long(arg, drive->keep_settings); + + case HDIO_GET_UNMASKINTR: + return write_fs_long(arg, drive->unmask); + + case HDIO_GET_DMA: + return write_fs_long(arg, drive->using_dma); + + case HDIO_GET_32BIT: + return write_fs_long(arg, drive->io_32bit); + + case HDIO_GET_MULTCOUNT: + return write_fs_long(arg, drive->mult_count); + + case HDIO_GET_IDENTITY: + if (!arg || (MINOR(inode->i_rdev) & PARTN_MASK)) + return -EINVAL; + if (drive->id == NULL) + return -ENOMSG; + err = verify_area(VERIFY_WRITE, (char *)arg, sizeof(*drive->id)); + if (!err) + memcpy_tofs((char *)arg, (char *)drive->id, sizeof(*drive->id)); + return err; + + case HDIO_GET_NOWERR: + return write_fs_long(arg, drive->bad_wstat == BAD_R_STAT); + + case HDIO_SET_DMA: + if (!suser()) return -EACCES; +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->media == ide_cdrom) + return -EPERM; +#endif /* CONFIG_BLK_DEV_IDECD */ + if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc) + return -EPERM; + case HDIO_SET_KEEPSETTINGS: + case HDIO_SET_UNMASKINTR: + case HDIO_SET_NOWERR: + if (arg > 1) + return -EINVAL; + case HDIO_SET_32BIT: + if (!suser()) return -EACCES; + if ((MINOR(inode->i_rdev) & PARTN_MASK)) + return -EINVAL; + save_flags(flags); + cli(); + switch (cmd) { + case HDIO_SET_DMA: + if (!(HWIF(drive)->dmaproc)) { + restore_flags(flags); + return -EPERM; + } + drive->using_dma = arg; + break; + case HDIO_SET_KEEPSETTINGS: + drive->keep_settings = arg; + break; + case HDIO_SET_UNMASKINTR: + if (arg && drive->no_unmask) { + restore_flags(flags); + return -EPERM; + } + drive->unmask = arg; + break; + case HDIO_SET_NOWERR: + drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; + break; + case HDIO_SET_32BIT: + if (arg > (1 + (SUPPORT_VLB_SYNC<<1))) { + restore_flags(flags); + return -EINVAL; + } + if (arg && drive->no_io_32bit) { + restore_flags(flags); + return -EPERM; + } + drive->io_32bit = arg; +#ifdef CONFIG_BLK_DEV_DTC2278 + if (HWIF(drive)->chipset == ide_dtc2278) + HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; +#endif /* CONFIG_BLK_DEV_DTC2278 */ + break; + } + restore_flags(flags); + return 0; + + case HDIO_SET_MULTCOUNT: + if (!suser()) return -EACCES; + if (MINOR(inode->i_rdev) & PARTN_MASK) + return -EINVAL; + if (drive->id && arg > drive->id->max_multsect) + return -EINVAL; + save_flags(flags); + cli(); + if (drive->special.b.set_multmode) { + restore_flags(flags); + return -EBUSY; + } + drive->mult_req = arg; + drive->special.b.set_multmode = 1; + restore_flags(flags); + (void) ide_do_drive_cmd (drive, &rq, ide_wait); + return (drive->mult_count == arg) ? 0 : -EIO; + + case HDIO_DRIVE_CMD: + { + byte args[4], *argbuf = args; + int argsize = 4; + if (!suser() || securelevel > 0) return -EACCES; + if (NULL == (void *) arg) { + err = ide_do_drive_cmd(drive, &rq, ide_wait); + } else if (!(err = verify_area(VERIFY_READ,(void *)arg, 4))) { + memcpy_fromfs(args, (void *)arg, 4); + if (args[3]) { + argsize = 4 + (SECTOR_WORDS * 4 * args[3]); + argbuf = kmalloc(argsize, GFP_KERNEL); + if (argbuf == NULL) + return -ENOMEM; + argbuf[0] = args[0]; + argbuf[1] = args[1]; + argbuf[2] = args[2]; + argbuf[3] = args[3]; + } + if (!(err = verify_area(VERIFY_WRITE,(void *)arg, argsize))) { + rq.buffer = argbuf; + err = ide_do_drive_cmd(drive, &rq, ide_wait); + memcpy_tofs((void *)arg, argbuf, argsize); + } + if (argsize > 4) + kfree(argbuf); + } + return err; + } + case HDIO_SET_PIO_MODE: + if (!suser()) return -EACCES; + if (MINOR(inode->i_rdev) & PARTN_MASK) + return -EINVAL; + if (!HWIF(drive)->tuneproc) + return -ENOSYS; + save_flags(flags); + cli(); + if (drive->special.b.set_tune) { + restore_flags(flags); + return -EBUSY; + } + drive->tune_req = (byte) arg; + drive->special.b.set_tune = 1; + restore_flags(flags); + (void) ide_do_drive_cmd (drive, &rq, ide_wait); + return 0; + + RO_IOCTLS(inode->i_rdev, arg); + + default: +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->media == ide_cdrom) + return ide_cdrom_ioctl(drive, inode, file, cmd, arg); +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->media == ide_tape) + return idetape_blkdev_ioctl(drive, inode, file, cmd, arg); +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->media == ide_floppy) + return idefloppy_ioctl(drive, inode, file, cmd, arg); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + if (drive->media == ide_scsi) + return idescsi_ioctl(drive, inode, file, cmd, arg); +#endif /* CONFIG_BLK_DEV_IDESCSI */ + return -EPERM; + } +} + +static int ide_check_media_change (kdev_t i_rdev) +{ + ide_drive_t *drive; + + if ((drive = get_info_ptr(i_rdev)) == NULL) + return -ENODEV; +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->media == ide_cdrom) + return ide_cdrom_check_media_change (drive); +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + if (drive->media == ide_floppy) + return idefloppy_media_change (drive); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ + if (drive->removable) /* for disks */ + return 1; /* always assume it was changed */ + return 0; +} + +void ide_fixstring (byte *s, const int bytecount, const int byteswap) +{ + byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ + + if (byteswap) { + /* convert from big-endian to host byte order */ + for (p = end ; p != s;) { + unsigned short *pp = (unsigned short *) (p -= 2); + *pp = ntohs(*pp); + } + } + + /* strip leading blanks */ + while (s != end && *s == ' ') + ++s; + + /* compress internal blanks and strip trailing blanks */ + while (s != end && *s) { + if (*s++ != ' ' || (s != end && *s && *s != ' ')) + *p++ = *(s-1); + } + + /* wipe out trailing garbage */ + while (p != end) + *p++ = '\0'; +} + +static inline void do_identify (ide_drive_t *drive, byte cmd) +{ + int bswap; + struct hd_driveid *id; + unsigned long capacity, check; + + id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_KERNEL); + ide_input_data(drive, id, SECTOR_WORDS);/* read 512 bytes of id info */ + sti(); + +#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) + /* + * EATA SCSI controllers do a hardware ATA emulation: + * Ignore them if there is a driver for them available. + */ + if ((id->model[0] == 'P' && id->model[1] == 'M') + || (id->model[0] == 'S' && id->model[1] == 'K')) { + printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); + drive->present = 0; + return; + } +#endif + + /* + * WIN_IDENTIFY returns little-endian info, + * WIN_PIDENTIFY *usually* returns little-endian info. + */ + bswap = 1; + if (cmd == WIN_PIDENTIFY) { + if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ + || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ + || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ + bswap = 0; /* Vertos drives may still be weird */ + } + ide_fixstring (id->model, sizeof(id->model), bswap); + ide_fixstring (id->fw_rev, sizeof(id->fw_rev), bswap); + ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap); + + if (strstr(id->model, "E X A B Y T E N E S T")) + return; + +#ifdef CONFIG_BLK_DEV_IDEATAPI + /* + * Check for an ATAPI device + */ + if (cmd == WIN_PIDENTIFY) { + byte type = (id->config >> 8) & 0x1f; + printk("%s: %s, ATAPI ", drive->name, id->model); +#ifdef CONFIG_BLK_DEV_PROMISE + if (HWIF(drive)->is_promise2) { + printk(" -- not supported on 2nd Promise port\n"); + drive->present = 0; + return; + } +#endif /* CONFIG_BLK_DEV_PROMISE */ + if (!drive->ide_scsi) switch (type) { + case 0: + if (!strstr(id->model, "oppy") && !strstr(id->model, "poyp") && !strstr(id->model, "ZIP")) + printk("cdrom or floppy?, assuming "); + if (drive->media != ide_cdrom && !strstr(id->model, "CD-ROM")) { +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + printk("FLOPPY drive\n"); + drive->media = ide_floppy; + if (idefloppy_identify_device(drive, id)) + drive->present = 1; + return; +#else + printk("FLOPPY "); + break; +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ + } + /* Early cdrom models used zero */ + case 5: +#ifdef CONFIG_BLK_DEV_IDECD + printk ("CDROM drive\n"); + drive->media = ide_cdrom; + drive->present = 1; + drive->removable = 1; + return; +#else + printk ("CDROM "); + break; +#endif /* CONFIG_BLK_DEV_IDECD */ + case 1: +#ifdef CONFIG_BLK_DEV_IDETAPE + printk ("TAPE drive"); + if (idetape_identify_device (drive,id)) { + drive->media = ide_tape; + drive->present = 1; + drive->removable = 1; + if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) { + if (!HWIF(drive)->dmaproc(ide_dma_check, drive)) + printk(", DMA"); + } + printk("\n"); + } + else { + drive->present = 0; + printk ("\nide-tape: the tape is not supported by this version of the driver\n"); + } + return; +#else + printk ("TAPE "); + break; +#endif /* CONFIG_BLK_DEV_IDETAPE */ + default: + drive->present = 0; + printk("Type %d - Unknown device\n", type); + return; + } +#ifdef CONFIG_BLK_DEV_IDESCSI + printk("drive - enabling SCSI emulation\n"); + drive->media = ide_scsi; + drive->present = 1; + idescsi_setup(drive); +#else + drive->present = 0; + printk("- not supported by this kernel\n"); +#endif /* CONFIG_BLK_DEV_IDESCSI */ + return; + } +#endif /* CONFIG_BLK_DEV_IDEATAPI */ + + /* check for removable disks (eg. SYQUEST), ignore 'WD' drives */ + if (id->config & (1<<7)) { /* removable disk ? */ + if (id->model[0] != 'W' || id->model[1] != 'D') + drive->removable = 1; + } + + /* SunDisk drives: treat as non-removable, force one unit */ + if (id->model[0] == 'S' && id->model[1] == 'u') { + drive->removable = 0; + if (drive->select.all & (1<<4)) { + drive->present = 0; + return; + } + } + + drive->media = ide_disk; + /* Extract geometry if we did not already have one for the drive */ + if (!drive->present) { + drive->present = 1; + drive->cyl = drive->bios_cyl = id->cyls; + drive->head = drive->bios_head = id->heads; + drive->sect = drive->bios_sect = id->sectors; + } + /* Handle logical geometry translation by the drive */ + if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads + && (id->cur_heads <= 16) && id->cur_sectors) + { + /* + * Extract the physical drive geometry for our use. + * Note that we purposely do *not* update the bios info. + * This way, programs that use it (like fdisk) will + * still have the same logical view as the BIOS does, + * which keeps the partition table from being screwed. + * + * An exception to this is the cylinder count, + * which we reexamine later on to correct for 1024 limitations. + */ + drive->cyl = id->cur_cyls; + drive->head = id->cur_heads; + drive->sect = id->cur_sectors; + + /* check for word-swapped "capacity" field in id information */ + capacity = drive->cyl * drive->head * drive->sect; + check = (id->cur_capacity0 << 16) | id->cur_capacity1; + if (check == capacity) { /* was it swapped? */ + /* yes, bring it into little-endian order: */ + id->cur_capacity0 = (capacity >> 0) & 0xffff; + id->cur_capacity1 = (capacity >> 16) & 0xffff; + } + } + /* Use physical geometry if what we have still makes no sense */ + if ((!drive->head || drive->head > 16) && id->heads && id->heads <= 16) { + drive->cyl = id->cyls; + drive->head = id->heads; + drive->sect = id->sectors; + } + + /* calculate drive capacity, and select LBA if possible */ + (void) current_capacity (drive); + + /* Correct the number of cyls if the bios value is too small */ + if (drive->sect == drive->bios_sect && drive->head == drive->bios_head) { + if (drive->cyl > drive->bios_cyl) + drive->bios_cyl = drive->cyl; + } + + if (!strncmp(id->model, "BMI ", 4) && + strstr(id->model, " ENHANCED IDE ") && + drive->select.b.lba) + drive->no_geom = 1; + + printk ("%s: %.40s, %ldMB w/%dkB Cache, CHS=%d/%d/%d", + drive->name, id->model, current_capacity(drive)/2048L, id->buf_size/2, + drive->bios_cyl, drive->bios_head, drive->bios_sect); + + drive->mult_count = 0; + if (id->max_multsect) { + drive->mult_req = INITIAL_MULT_COUNT; + if (drive->mult_req > id->max_multsect) + drive->mult_req = id->max_multsect; + if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) + drive->special.b.set_multmode = 1; + } + if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) { + if (!(HWIF(drive)->dmaproc(ide_dma_check, drive))) { + if ((id->field_valid & 4) && (id->dma_ultra & (id->dma_ultra >> 8) & 7)) + printk(", UDMA"); + else + printk(", DMA"); + } + } + printk("\n"); +} + +/* + * Delay for *at least* 50ms. As we don't know how much time is left + * until the next tick occurs, we wait an extra tick to be safe. + * This is used only during the probing/polling for drives at boot time. + */ +static void delay_50ms (void) +{ + unsigned long timer = jiffies + ((HZ + 19)/20) + 1; + while (timer > jiffies); +} + +/* + * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive + * and waits for a response. It also monitors irqs while this is + * happening, in hope of automatically determining which one is + * being used by the interface. + * + * Returns: 0 device was identified + * 1 device timed-out (no response to identify request) + * 2 device aborted the command (refused to identify itself) + */ +static int try_to_identify (ide_drive_t *drive, byte cmd) +{ + int hd_status, rc; + unsigned long timeout; + unsigned long irqs_on = 0; + int irq_off; + + if (!HWIF(drive)->irq) { /* already got an IRQ? */ + probe_irq_off(probe_irq_on()); /* clear dangling irqs */ + irqs_on = probe_irq_on(); /* start monitoring irqs */ + OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* enable device irq */ + } + + delay_50ms(); /* take a deep breath */ + if ((IN_BYTE(IDE_ALTSTATUS_REG) ^ IN_BYTE(IDE_STATUS_REG)) & ~INDEX_STAT) { + printk("%s: probing with STATUS instead of ALTSTATUS\n", drive->name); + hd_status = IDE_STATUS_REG; /* ancient Seagate drives */ + } else + hd_status = IDE_ALTSTATUS_REG; /* use non-intrusive polling */ + +#if CONFIG_BLK_DEV_PROMISE + if (IS_PROMISE_DRIVE) { + if (promise_cmd(drive,PROMISE_IDENTIFY)) { + if (irqs_on) + (void) probe_irq_off(irqs_on); + return 1; + } + } else +#endif /* CONFIG_BLK_DEV_PROMISE */ + OUT_BYTE(cmd,IDE_COMMAND_REG); /* ask drive for ID */ + timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; + timeout += jiffies; + do { + if (jiffies > timeout) { + if (irqs_on) + (void) probe_irq_off(irqs_on); + return 1; /* drive timed-out */ + } + delay_50ms(); /* give drive a breather */ + } while (IN_BYTE(hd_status) & BUSY_STAT); + + delay_50ms(); /* wait for IRQ and DRQ_STAT */ + if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) { + unsigned long flags; + save_flags(flags); + cli(); /* some systems need this */ + do_identify(drive, cmd); /* drive returned ID */ + rc = 0; /* drive responded with ID */ + (void) GET_STAT(); /* clear drive IRQ */ + restore_flags(flags); + } else + rc = 2; /* drive refused ID */ + if (!HWIF(drive)->irq) { + irq_off = probe_irq_off(irqs_on); /* get our irq number */ + if (irq_off > 0) { + HWIF(drive)->irq = irq_off; /* save it for later */ + irqs_on = probe_irq_on(); + OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */ + udelay(5); + (void) probe_irq_off(irqs_on); + (void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */ + (void) GET_STAT(); /* clear drive IRQ */ + + } else { /* Mmmm.. multiple IRQs.. don't know which was ours */ + printk("%s: IRQ probe failed (%d)\n", drive->name, irq_off); +#ifdef CONFIG_BLK_DEV_CMD640 +#ifdef CMD640_DUMP_REGS + if (HWIF(drive)->chipset == ide_cmd640) { + printk("%s: Hmmm.. probably a driver problem.\n", drive->name); + CMD640_DUMP_REGS; + } +#endif /* CMD640_DUMP_REGS */ +#endif /* CONFIG_BLK_DEV_CMD640 */ + } + } + return rc; +} + +/* + * do_probe() has the difficult job of finding a drive if it exists, + * without getting hung up if it doesn't exist, without trampling on + * ethernet cards, and without leaving any IRQs dangling to haunt us later. + * + * If a drive is "known" to exist (from CMOS or kernel parameters), + * but does not respond right away, the probe will "hang in there" + * for the maximum wait time (about 30 seconds), otherwise it will + * exit much more quickly. + * + * Returns: 0 device was identified + * 1 device timed-out (no response to identify request) + * 2 device aborted the command (refused to identify itself) + * 3 bad status from device (possible for ATAPI drives) + * 4 probe was not attempted because failure was obvious + */ +static int do_probe (ide_drive_t *drive, byte cmd) +{ + int rc; + ide_hwif_t *hwif = HWIF(drive); + unsigned long timeout; +#ifdef CONFIG_BLK_DEV_IDEATAPI + if (drive->present) { /* avoid waiting for inappropriate probes */ + if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) + return 4; + } +#endif /* CONFIG_BLK_DEV_IDEATAPI */ +#ifdef DEBUG + printk("probing for %s: present=%d, media=%d, probetype=%s\n", + drive->name, drive->present, drive->media, + (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); +#endif + SELECT_DRIVE(hwif,drive); + delay_50ms(); + if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) { + OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */ + delay_50ms(); /* allow BUSY_STAT to assert & clear */ + return 3; /* no i/f present: avoid killing ethernet cards */ + } + + if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT) + || drive->present || cmd == WIN_PIDENTIFY) + { + if ((rc = try_to_identify(drive,cmd))) /* send cmd and wait */ + rc = try_to_identify(drive,cmd); /* failed: try again */ + if (rc == 1 && cmd == WIN_PIDENTIFY && drive->autotune != 2) { + printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT()); + delay_50ms(); + OUT_BYTE (drive->select.all, IDE_SELECT_REG); + delay_50ms(); + OUT_BYTE(WIN_SRST, IDE_COMMAND_REG); + timeout = jiffies; + while ((GET_STAT() & BUSY_STAT) && jiffies < timeout + WAIT_WORSTCASE) + delay_50ms(); + rc = try_to_identify(drive, cmd); + } + if (rc == 1) + printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT()); + (void) GET_STAT(); /* ensure drive irq is clear */ + } else { + rc = 3; /* not present or maybe ATAPI */ + } + if (drive->select.b.unit != 0) { + OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */ + delay_50ms(); + (void) GET_STAT(); /* ensure drive irq is clear */ + } + return rc; +} + +static void enable_nest (ide_drive_t *drive) +{ + unsigned long timeout; + + printk("%s: enabling %s -- ", HWIF(drive)->name, drive->id->model); + SELECT_DRIVE(HWIF(drive), drive); + delay_50ms(); + OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); + timeout = jiffies + WAIT_WORSTCASE; + do { + if (jiffies > timeout) { + printk("failed (timeout)\n"); + return; + } + delay_50ms(); + } while (GET_STAT() & BUSY_STAT); + delay_50ms(); + if (!OK_STAT(GET_STAT(), 0, BAD_STAT)) + printk("failed (status = 0x%02x)\n", GET_STAT()); + else + printk("success\n"); + if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */ +#ifdef CONFIG_BLK_DEV_IDEATAPI + (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */ +#endif /* CONFIG_BLK_DEV_IDEATAPI */ + } +} + +/* + * probe_for_drive() tests for existence of a given drive using do_probe(). + * + * Returns: 0 no device was found + * 1 device was found (note: drive->present might still be 0) + */ +static inline byte probe_for_drive (ide_drive_t *drive) +{ + if (drive->noprobe) /* skip probing? */ + return drive->present; + if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */ +#ifdef CONFIG_BLK_DEV_IDEATAPI + (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */ +#endif /* CONFIG_BLK_DEV_IDEATAPI */ + } + if (drive->id && strstr(drive->id->model, "E X A B Y T E N E S T")) + enable_nest(drive); + if (!drive->present) + return 0; /* drive not found */ + if (drive->id == NULL) { /* identification failed? */ + if (drive->media == ide_disk) { + printk ("%s: non-IDE drive, CHS=%d/%d/%d\n", + drive->name, drive->cyl, drive->head, drive->sect); + } +#ifdef CONFIG_BLK_DEV_IDECD + else if (drive->media == ide_cdrom) { + printk("%s: ATAPI cdrom (?)\n", drive->name); + } +#endif /* CONFIG_BLK_DEV_IDECD */ + else { + drive->present = 0; /* nuke it */ + } + } + return 1; /* drive was found */ +} + +/* + * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc + * controller that is BIOS compatible with ST-506, and thus showing up in our + * BIOS table, but not register compatible, and therefore not present in CMOS. + * + * Furthermore, we will assume that our ST-506 drives <if any> are the primary + * drives in the system -- the ones reflected as drive 1 or 2. The first + * drive is stored in the high nibble of CMOS byte 0x12, the second in the low + * nibble. This will be either a 4 bit drive type or 0xf indicating use byte + * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. A non-zero value + * means we have an AT controller hard disk for that drive. + * + * Of course, there is no guarantee that either drive is actually on the + * "primary" IDE interface, but we don't bother trying to sort that out here. + * If a drive is not actually on the primary interface, then these parameters + * will be ignored. This results in the user having to supply the logical + * drive geometry as a boot parameter for each drive not on the primary i/f. + * + * The only "perfect" way to handle this would be to modify the setup.[cS] code + * to do BIOS calls Int13h/Fn08h and Int13h/Fn48h to get all of the drive info + * for us during initialization. I have the necessary docs -- any takers? -ml + */ +static void probe_cmos_for_drives (ide_hwif_t *hwif) +{ +#ifdef __i386__ + extern struct drive_info_struct drive_info; + byte cmos_disks, *BIOS = (byte *) &drive_info; + int unit; + +#ifdef CONFIG_BLK_DEV_PROMISE + if (hwif->is_promise2) + return; +#endif /* CONFIG_BLK_DEV_PROMISE */ + outb_p(0x12,0x70); /* specify CMOS address 0x12 */ + cmos_disks = inb_p(0x71); /* read the data from 0x12 */ + /* Extract drive geometry from CMOS+BIOS if not already setup */ + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + if ((cmos_disks & (0xf0 >> (unit*4))) && !drive->present && !drive->nobios) { + drive->cyl = drive->bios_cyl = *(unsigned short *)BIOS; + drive->head = drive->bios_head = *(BIOS+2); + drive->sect = drive->bios_sect = *(BIOS+14); + drive->ctl = *(BIOS+8); + drive->present = 1; + } + BIOS += 16; + } +#endif +} + +/* + * This routine only knows how to look for drive units 0 and 1 + * on an interface, so any setting of MAX_DRIVES > 2 won't work here. + */ +static void probe_hwif (ide_hwif_t *hwif) +{ + unsigned int unit; + + if (hwif->noprobe) + return; + if (hwif->io_base == HD_DATA) + probe_cmos_for_drives (hwif); +#if CONFIG_BLK_DEV_PROMISE + if (!hwif->is_promise2 && + (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1))) { +#else + if (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1)) { +#endif /* CONFIG_BLK_DEV_PROMISE */ + int msgout = 0; + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + if (drive->present) { + drive->present = 0; + printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name); + msgout = 1; + } + } + if (!msgout) + printk("%s: ports already in use, skipping probe\n", hwif->name); + } else { + unsigned long flags; + save_flags(flags); + + sti(); /* needed for jiffies and irq probing */ + /* + * Second drive should only exist if first drive was found, + * but a lot of cdrom drives are configured as single slaves. + */ + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + (void) probe_for_drive (drive); + if (drive->present && drive->media == ide_disk) { + if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { + printk("%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", + drive->name, drive->head); + drive->present = 0; + } + } + if (drive->present && !hwif->present) { + hwif->present = 1; + request_region(hwif->io_base, 8, hwif->name); + request_region(hwif->ctl_port, 1, hwif->name); + } + } + restore_flags(flags); + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + if (drive->present && drive->media != ide_tape) { + ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc; + if (tuneproc != NULL && drive->autotune == 1) + tuneproc(drive, 255); /* auto-tune PIO mode */ + } + } + } +} + +/* + * stridx() returns the offset of c within s, + * or -1 if c is '\0' or not found within s. + */ +static int stridx (const char *s, char c) +{ + char *i = strchr(s, c); + return (i && c) ? i - s : -1; +} + +/* + * match_parm() does parsing for ide_setup(): + * + * 1. the first char of s must be '='. + * 2. if the remainder matches one of the supplied keywords, + * the index (1 based) of the keyword is negated and returned. + * 3. if the remainder is a series of no more than max_vals numbers + * separated by commas, the numbers are saved in vals[] and a + * count of how many were saved is returned. Base10 is assumed, + * and base16 is allowed when prefixed with "0x". + * 4. otherwise, zero is returned. + */ +static int match_parm (char *s, const char *keywords[], int vals[], int max_vals) +{ + static const char *decimal = "0123456789"; + static const char *hex = "0123456789abcdef"; + int i, n; + + if (*s++ == '=') { + /* + * Try matching against the supplied keywords, + * and return -(index+1) if we match one + */ + if (keywords != NULL) { + for (i = 0; *keywords != NULL; ++i) { + if (!strcmp(s, *keywords++)) + return -(i+1); + } + } + /* + * Look for a series of no more than "max_vals" + * numeric values separated by commas, in base10, + * or base16 when prefixed with "0x". + * Return a count of how many were found. + */ + for (n = 0; (i = stridx(decimal, *s)) >= 0;) { + vals[n] = i; + while ((i = stridx(decimal, *++s)) >= 0) + vals[n] = (vals[n] * 10) + i; + if (*s == 'x' && !vals[n]) { + while ((i = stridx(hex, *++s)) >= 0) + vals[n] = (vals[n] * 0x10) + i; + } + if (++n == max_vals) + break; + if (*s == ',') + ++s; + } + if (!*s) + return n; + } + return 0; /* zero = nothing matched */ +} + +/* + * ide_setup() gets called VERY EARLY during initialization, + * to handle kernel "command line" strings beginning with "hdx=" + * or "ide". Here is the complete set currently supported: + * + * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc". + * "idex=" is recognized for all "x" from "0" to "3", such as "ide1". + * + * "hdx=noprobe" : drive may be present, but do not probe for it + * "hdx=none" : drive is NOT present, ignore cmos and do not probe + * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive + * "hdx=cdrom" : drive is present, and is a cdrom drive + * "hdx=cyl,head,sect" : disk drive is present, with specified geometry + * "hdx=autotune" : driver will attempt to tune interface speed + * to the fastest PIO mode supported, + * if possible for this drive only. + * Not fully supported by all chipset types, + * and quite likely to cause trouble with + * older/odd IDE drives. + * + * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in Mhz, + * where "xx" is between 20 and 66 inclusive, + * used when tuning chipset PIO modes. + * For PCI bus, 25 is correct for a P75 system, + * 30 is correct for P90,P120,P180 systems, + * and 33 is used for P100,P133,P166 systems. + * If in doubt, use idebus=33 for PCI. + * As for VLB, it is safest to not specify it. + * + * "idex=noprobe" : do not attempt to access/use this interface + * "idex=base" : probe for an interface at the addr specified, + * where "base" is usually 0x1f0 or 0x170 + * and "ctl" is assumed to be "base"+0x206 + * "idex=base,ctl" : specify both base and ctl + * "idex=base,ctl,irq" : specify base, ctl, and irq number + * "idex=autotune" : driver will attempt to tune interface speed + * to the fastest PIO mode supported, + * for all drives on this interface. + * Not fully supported by all chipset types, + * and quite likely to cause trouble with + * older/odd IDE drives. + * "idex=noautotune" : driver will NOT attempt to tune interface speed + * This is the default for most chipsets, + * except the cmd640. + * "idex=serialize" : do not overlap operations on idex and ide(x^1) + * + * The following are valid ONLY on ide0, + * and the defaults for the base,ctl ports must not be altered. + * + * "ide0=dtc2278" : probe/support DTC2278 interface + * "ide0=ht6560b" : probe/support HT6560B interface + * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip + * (not for PCI -- automatically detected) + * "ide0=qd6580" : probe/support qd6580 interface + * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445) + * "ide0=umc8672" : probe/support umc8672 chipsets + */ +void ide_setup (char *s) +{ + int i, vals[3]; + ide_hwif_t *hwif; + ide_drive_t *drive; + unsigned int hw, unit; + const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); + const char max_hwif = '0' + (MAX_HWIFS - 1); + + printk("ide_setup: %s", s); + init_ide_data (); + + /* + * Look for drive options: "hdx=" + */ + if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { + const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom", + "serialize", "autotune", "noautotune", + "slow", "ide-scsi", NULL}; + unit = s[2] - 'a'; + hw = unit / MAX_DRIVES; + unit = unit % MAX_DRIVES; + hwif = &ide_hwifs[hw]; + drive = &hwif->drives[unit]; + switch (match_parm(&s[3], hd_words, vals, 3)) { + case -1: /* "none" */ + drive->nobios = 1; /* drop into "noprobe" */ + case -2: /* "noprobe" */ + drive->noprobe = 1; + goto done; + case -3: /* "nowerr" */ + drive->bad_wstat = BAD_R_STAT; + hwif->noprobe = 0; + goto done; + case -4: /* "cdrom" */ + drive->present = 1; + drive->media = ide_cdrom; + hwif->noprobe = 0; + goto done; + case -5: /* "serialize" */ + printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); + goto do_serialize; + case -6: /* "autotune" */ + drive->autotune = 1; + goto done; + case -7: /* "noautotune" */ + drive->autotune = 2; + goto done; + case -8: /* "slow" */ + drive->slow = 1; + goto done; + case -9: /* "ide-scsi" */ + drive->ide_scsi = 1; + goto done; + case 3: /* cyl,head,sect */ + drive->media = ide_disk; + drive->cyl = drive->bios_cyl = vals[0]; + drive->head = drive->bios_head = vals[1]; + drive->sect = drive->bios_sect = vals[2]; + drive->present = 1; + drive->forced_geom = 1; + hwif->noprobe = 0; + goto done; + default: + goto bad_option; + } + } + + if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') + goto bad_option; + /* + * Look for bus speed option: "idebus=" + */ + if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { + if (match_parm(&s[6], NULL, vals, 1) != 1) + goto bad_option; + if (vals[0] >= 20 && vals[0] <= 66) + idebus_parameter = vals[0]; + else + printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); + goto done; + } + /* + * Look for interface options: "idex=" + */ + if (s[3] >= '0' && s[3] <= max_hwif) { + /* + * Be VERY CAREFUL changing this: note hardcoded indexes below + */ + const char *ide_words[] = {"noprobe", "serialize", "autotune", "noautotune", + "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL}; + hw = s[3] - '0'; + hwif = &ide_hwifs[hw]; + i = match_parm(&s[4], ide_words, vals, 3); + + /* + * Cryptic check to ensure chipset not already set for hwif: + */ + if (i > 0 || i <= -5) { + if (hwif->chipset != ide_unknown) + goto bad_option; + if (i <= -5) { + if (ide_hwifs[1].chipset != ide_unknown) + goto bad_option; + /* + * Interface keywords work only for ide0: + */ + if (hw != 0) + goto bad_hwif; + } + } + + switch (i) { +#ifdef CONFIG_BLK_DEV_PROMISE + case -11: /* "dc4030" */ + { + setup_dc4030(hwif); + goto done; + } +#endif /* CONFIG_BLK_DEV_PROMISE */ +#ifdef CONFIG_BLK_DEV_ALI14XX + case -10: /* "ali14xx" */ + { + extern void init_ali14xx (void); + init_ali14xx(); + goto done; + } +#endif /* CONFIG_BLK_DEV_ALI14XX */ +#ifdef CONFIG_BLK_DEV_UMC8672 + case -9: /* "umc8672" */ + { + extern void init_umc8672 (void); + init_umc8672(); + goto done; + } +#endif /* CONFIG_BLK_DEV_UMC8672 */ +#ifdef CONFIG_BLK_DEV_DTC2278 + case -8: /* "dtc2278" */ + { + extern void init_dtc2278 (void); + init_dtc2278(); + goto done; + } +#endif /* CONFIG_BLK_DEV_DTC2278 */ +#ifdef CONFIG_BLK_DEV_CMD640 + case -7: /* "cmd640_vlb" */ + { + extern int cmd640_vlb; /* flag for cmd640.c */ + cmd640_vlb = 1; + goto done; + } +#endif /* CONFIG_BLK_DEV_CMD640 */ +#ifdef CONFIG_BLK_DEV_HT6560B + case -6: /* "ht6560b" */ + { + extern void init_ht6560b (void); + init_ht6560b(); + goto done; + } +#endif /* CONFIG_BLK_DEV_HT6560B */ +#if CONFIG_BLK_DEV_QD6580 + case -5: /* "qd6580" (has secondary i/f) */ + { + extern void init_qd6580 (void); + init_qd6580(); + goto done; + } +#endif /* CONFIG_BLK_DEV_QD6580 */ + case -4: /* "noautotune" */ + hwif->drives[0].autotune = 2; + hwif->drives[1].autotune = 2; + goto done; + case -3: /* "autotune" */ + hwif->drives[0].autotune = 1; + hwif->drives[1].autotune = 1; + goto done; + case -2: /* "serialize" */ + do_serialize: + ide_hwifs[hw].serialized = 1; /* serialize */ + ide_hwifs[hw^1].serialized = 1; /* with mate */ + goto done; + + case -1: /* "noprobe" */ + hwif->noprobe = 1; + goto done; + + case 1: /* base */ + vals[1] = vals[0] + 0x206; /* default ctl */ + case 2: /* base,ctl */ + vals[2] = 0; /* default irq = probe for it */ + case 3: /* base,ctl,irq */ + hwif->io_base = vals[0]; + hwif->ctl_port = vals[1]; + hwif->irq = vals[2]; + hwif->noprobe = 0; + hwif->chipset = ide_generic; + goto done; + + case 0: goto bad_option; + default: + printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); + return; + } + } +bad_option: + printk(" -- BAD OPTION\n"); + return; +bad_hwif: + printk("-- NOT SUPPORTED ON ide%d", hw); +done: + printk("\n"); +} + +/* + * This routine is called from the partition-table code in genhd.c + * to "convert" a drive to a logical geometry with fewer than 1024 cyls. + * + * The second parameter, "xparm", determines exactly how the translation + * will be handled: + * 0 = convert to CHS with fewer than 1024 cyls + * using the same method as Ontrack DiskManager. + * 1 = same as "0", plus offset everything by 63 sectors. + * -1 = similar to "0", plus redirect sector 0 to sector 1. + * >1 = convert to a CHS geometry with "xparm" heads. + * + * Returns 0 if the translation was not possible, if the device was not + * an IDE disk drive, or if a geometry was "forced" on the commandline. + * Returns 1 if the geometry translation was successful. + */ +int ide_xlate_1024 (kdev_t i_rdev, int xparm, const char *msg) +{ + ide_drive_t *drive; + static const byte head_vals[] = {4, 8, 16, 32, 64, 128, 255, 0}; + const byte *heads = head_vals; + unsigned long tracks; + + if ((drive = get_info_ptr(i_rdev)) == NULL || drive->forced_geom) + return 0; + + if (xparm > 1 && xparm <= drive->bios_head && drive->bios_sect == 63) + return 0; /* we already have a translation */ + + printk("%s ", msg); + + if (drive->id) { + drive->cyl = drive->id->cyls; + drive->head = drive->id->heads; + drive->sect = drive->id->sectors; + } + drive->bios_cyl = drive->cyl; + drive->bios_head = drive->head; + drive->bios_sect = drive->sect; + drive->special.b.set_geometry = 1; + + tracks = drive->bios_cyl * drive->bios_head * drive->bios_sect / 63; + drive->bios_sect = 63; + if (xparm > 1) { + drive->bios_head = xparm; + drive->bios_cyl = tracks / drive->bios_head; + } else { + while (drive->bios_cyl >= 1024) { + drive->bios_head = *heads; + drive->bios_cyl = tracks / drive->bios_head; + if (0 == *++heads) + break; + } +#if FAKE_FDISK_FOR_EZDRIVE + if (xparm == -1) { + drive->remap_0_to_1 = 1; + msg = "0->1"; + } else +#endif /* FAKE_FDISK_FOR_EZDRIVE */ + if (xparm == 1) { + drive->sect0 = 63; + drive->bios_cyl = (tracks - 1) / drive->bios_head; + msg = "+63"; + } + printk("[remap %s] ", msg); + } + drive->part[0].nr_sects = current_capacity(drive); + printk("[%d/%d/%d]", drive->bios_cyl, drive->bios_head, drive->bios_sect); + return 1; +} + +#if MAX_HWIFS > 1 +/* + * save_match() is used to simplify logic in init_irq() below. + * + * A loophole here is that we may not know about a particular + * hwif's irq until after that hwif is actually probed/initialized.. + * This could be a problem for the case where an hwif is on a + * dual interface that requires serialization (eg. cmd640) and another + * hwif using one of the same irqs is initialized beforehand. + * + * This routine detects and reports such situations, but does not fix them. + */ +static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) +{ + ide_hwif_t *m = *match; + + if (m && m->hwgroup && m->hwgroup != new->hwgroup) { + if (!new->hwgroup) + return; + printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name); + } + if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ + *match = new; +} +#endif /* MAX_HWIFS > 1 */ + +/* + * This routine sets up the irq for an ide interface, and creates a new + * hwgroup for the irq/hwif if none was previously assigned. + * + * Much of the code is for correctly detecting/handling irq sharing + * and irq serialization situations. This is somewhat complex because + * it handles static as well as dynamic (PCMCIA) IDE interfaces. + * + * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with + * interrupts completely disabled. This can be bad for interrupt latency, + * but anything else has led to problems on some machines. We re-enable + * interrupts as much as we can safely do in most places. + */ +static int init_irq (ide_hwif_t *hwif) +{ + unsigned long flags; +#if MAX_HWIFS > 1 + unsigned int index; +#endif /* MAX_HWIFS > 1 */ + ide_hwgroup_t *hwgroup; + ide_hwif_t *match = NULL; + + save_flags(flags); + cli(); + + hwif->hwgroup = NULL; +#if MAX_HWIFS > 1 + /* + * Group up with any other hwifs that share our irq(s). + */ + for (index = 0; index < MAX_HWIFS; index++) { + ide_hwif_t *h = &ide_hwifs[index]; + if (h->hwgroup) { /* scan only initialized hwif's */ + if (hwif->irq == h->irq) { + hwif->sharing_irq = h->sharing_irq = 1; + save_match(hwif, h, &match); + } + if (hwif->serialized) { + ide_hwif_t *mate = &ide_hwifs[hwif->index^1]; + if (index == mate->index || h->irq == mate->irq) + save_match(hwif, h, &match); + } + if (h->serialized) { + ide_hwif_t *mate = &ide_hwifs[h->index^1]; + if (hwif->irq == mate->irq) + save_match(hwif, h, &match); + } + } + } +#endif /* MAX_HWIFS > 1 */ + /* + * If we are still without a hwgroup, then form a new one + */ + if (match) { + hwgroup = match->hwgroup; + } else { + hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL); + hwgroup->hwif = hwgroup->next_hwif = hwif->next = hwif; + hwgroup->rq = NULL; + hwgroup->handler = NULL; + if (hwif->drives[0].present) + hwgroup->drive = &hwif->drives[0]; + else + hwgroup->drive = &hwif->drives[1]; + hwgroup->poll_timeout = 0; + hwgroup->active = 0; + init_timer(&hwgroup->timer); + hwgroup->timer.function = &timer_expiry; + hwgroup->timer.data = (unsigned long) hwgroup; + } + + /* + * Allocate the irq, if not already obtained for another hwif + */ + if (!match || match->irq != hwif->irq) { + if (request_irq(hwif->irq, ide_intr, SA_INTERRUPT, hwif->name, hwgroup)) { + if (!match) + kfree(hwgroup); + restore_flags(flags); + return 1; + } + } + + /* + * Everything is okay, so link us into the hwgroup + */ + hwif->hwgroup = hwgroup; + hwif->next = hwgroup->hwif->next; + hwgroup->hwif->next = hwif; + + restore_flags(flags); /* safe now that hwif->hwgroup is set up */ + + printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name, + hwif->io_base, hwif->io_base+7, hwif->ctl_port, hwif->irq); + if (match) + printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name); + printk("\n"); + return 0; +} + +static struct file_operations ide_fops = { + NULL, /* lseek - default */ + block_read, /* read - general block-dev read */ + block_write, /* write - general block-dev write */ + NULL, /* readdir - bad */ + NULL, /* select */ + ide_ioctl, /* ioctl */ + NULL, /* mmap */ + ide_open, /* open */ + ide_release, /* release */ + block_fsync /* fsync */ + ,NULL, /* fasync */ + ide_check_media_change, /* check_media_change */ + revalidate_disk /* revalidate */ +}; + +#ifdef CONFIG_PCI +#if defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) + +typedef void (ide_pci_init_proc_t)(byte, byte); + +/* + * ide_probe_pci() scans PCI for a specific vendor/device function, + * and invokes the supplied init routine for each instance detected. + */ +static void ide_probe_pci (unsigned short vendor, unsigned short device, ide_pci_init_proc_t *init, int func_adj) +{ + unsigned long flags; + unsigned index; + byte fn, bus; + + save_flags(flags); + cli(); + for (index = 0; !pcibios_find_device (vendor, device, index, &bus, &fn); ++index) { + init (bus, fn + func_adj); + } + restore_flags(flags); +} + +#endif /* defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) */ + +static void ide_probe_promise_20246(void) +{ + byte fn, bus; + unsigned short io[6], count = 0; + unsigned int reg, tmp, i; + ide_hwif_t *hwif; + + memset(io, 0, 6 * sizeof(unsigned short)); + if (pcibios_find_device(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, 0, &bus, &fn)) + return; + printk("ide: Promise Technology IDE Ultra-DMA 33 on PCI bus %d function %d\n", bus, fn); + for (reg = PCI_BASE_ADDRESS_0; reg <= PCI_BASE_ADDRESS_5; reg += 4) { + pcibios_read_config_dword(bus, fn, reg, &tmp); + if (tmp & PCI_BASE_ADDRESS_SPACE_IO) + io[count++] = tmp & PCI_BASE_ADDRESS_IO_MASK; + } + for (i = 2; i < 4; i++) { + hwif = ide_hwifs + i; + if (hwif->chipset == ide_generic) { + printk("ide%d: overridden with command line parameter\n", i); + return; + } + tmp = (i - 2) * 2; + if (!io[tmp] || !io[tmp + 1]) { + printk("ide%d: invalid port address %x, %x -- aborting\n", i, io[tmp], io[tmp + 1]); + return; + } + hwif->io_base = io[tmp]; + hwif->ctl_port = io[tmp + 1] + 2; + hwif->noprobe = 0; + } +#ifdef CONFIG_BLK_DEV_TRITON + ide_init_promise (bus, fn, &ide_hwifs[2], &ide_hwifs[3], io[4]); +#endif /* CONFIG_BLK_DEV_TRITON */ +} + +#endif /* CONFIG_PCI */ + +/* + * ide_init_pci() finds/initializes "known" PCI IDE interfaces + * + * This routine should ideally be using pcibios_find_class() to find + * all IDE interfaces, but that function causes some systems to "go weird". + */ +static void probe_for_hwifs (void) +{ +#ifdef CONFIG_PCI + /* + * Find/initialize PCI IDE interfaces + */ + if (pcibios_present()) { +#ifdef CONFIG_BLK_DEV_RZ1000 + ide_pci_init_proc_t init_rz1000; + ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, &init_rz1000, 0); + ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, &init_rz1000, 0); +#endif /* CONFIG_BLK_DEV_RZ1000 */ +#ifdef CONFIG_BLK_DEV_TRITON + /* + * Apparently the BIOS32 services on Intel motherboards are + * buggy and won't find the PCI_DEVICE_ID_INTEL_82371_1 for us. + * So instead, we search for PCI_DEVICE_ID_INTEL_82371_0, + * and then add 1. + */ + ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371_0, &ide_init_triton, 1); + ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1, &ide_init_triton, 0); + ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB, &ide_init_triton, 0); +#endif /* CONFIG_BLK_DEV_TRITON */ + ide_probe_promise_20246(); + } +#endif /* CONFIG_PCI */ +#ifdef CONFIG_BLK_DEV_CMD640 + { + extern void ide_probe_for_cmd640x (void); + ide_probe_for_cmd640x(); + } +#endif +#ifdef CONFIG_BLK_DEV_PROMISE + init_dc4030(); +#endif +} + +static int hwif_init (int h) +{ + ide_hwif_t *hwif = &ide_hwifs[h]; + void (*rfn)(void); + + if (!hwif->present) + return 0; + if (!hwif->irq) { + if (!(hwif->irq = default_irqs[h])) { + printk("%s: DISABLED, NO IRQ\n", hwif->name); + return (hwif->present = 0); + } + } +#ifdef CONFIG_BLK_DEV_HD + if (hwif->irq == HD_IRQ && hwif->io_base != HD_DATA) { + printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name); + return (hwif->present = 0); + } +#endif /* CONFIG_BLK_DEV_HD */ + + hwif->present = 0; /* we set it back to 1 if all is ok below */ + switch (hwif->major) { + case IDE0_MAJOR: rfn = &do_ide0_request; break; +#if MAX_HWIFS > 1 + case IDE1_MAJOR: rfn = &do_ide1_request; break; +#endif +#if MAX_HWIFS > 2 + case IDE2_MAJOR: rfn = &do_ide2_request; break; +#endif +#if MAX_HWIFS > 3 + case IDE3_MAJOR: rfn = &do_ide3_request; break; +#endif + default: + printk("%s: request_fn NOT DEFINED\n", hwif->name); + return (hwif->present = 0); + } + if (register_blkdev (hwif->major, hwif->name, &ide_fops)) { + printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major); + } else if (init_irq (hwif)) { + printk("%s: UNABLE TO GET IRQ %d\n", hwif->name, hwif->irq); + (void) unregister_blkdev (hwif->major, hwif->name); + } else { + init_gendisk(hwif); + blk_dev[hwif->major].request_fn = rfn; + read_ahead[hwif->major] = 8; /* (4kB) */ + hwif->present = 1; /* success */ + } + return hwif->present; +} + +/* + * This is gets invoked once during initialization, to set *everything* up + */ +int ide_init (void) +{ + int index; + + init_ide_data (); + /* + * Probe for special "known" interface chipsets + */ + probe_for_hwifs (); + + /* + * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports + */ + for (index = 0; index < MAX_HWIFS; ++index) + probe_hwif (&ide_hwifs[index]); + for (index = 0; index < MAX_HWIFS; ++index) + hwif_init (index); + +#ifdef CONFIG_BLK_DEV_IDETAPE + idetape_register_chrdev(); /* Register character device interface to the ide tape */ +#endif /* CONFIG_BLK_DEV_IDETAPE */ + + return 0; +} + +#ifdef CONFIG_BLK_DEV_IDE_PCMCIA +int ide_register(int io_base, int ctl_port, int irq) +{ + int index, i, rc = -1; + ide_hwif_t *hwif; + ide_drive_t *drive; + unsigned long flags; + + save_flags(flags); + cli(); + for (index = 0; index < MAX_HWIFS; ++index) { + hwif = &ide_hwifs[index]; + if (hwif->present) { + if (hwif->io_base == io_base || hwif->ctl_port == ctl_port) + break; /* this ide port already exists */ + } else { + hwif->io_base = io_base; + hwif->ctl_port = ctl_port; + hwif->irq = irq; + hwif->noprobe = 0; + probe_hwif(hwif); + if (!hwif_init(index)) + break; + for (i = 0; i < hwif->gd->nr_real; i++) { + drive = &hwif->drives[i]; + revalidate_disk(MKDEV(hwif->major, i<<PARTN_BITS)); +#ifdef CONFIG_BLK_DEV_IDECD + if (drive->present && drive->media == ide_cdrom) + ide_cdrom_setup(drive); +#endif /* CONFIG_BLK_DEV_IDECD */ + } + rc = index; + break; + } + } + restore_flags(flags); + return rc; +} + +void ide_unregister (unsigned int index) +{ + struct gendisk *gd, **gdp; + ide_hwif_t *hwif, *g; + ide_hwgroup_t *hwgroup; + int irq_count = 0; + unsigned long flags; + + if (index >= MAX_HWIFS) + return; + save_flags(flags); + cli(); + hwif = &ide_hwifs[index]; + if (!hwif->present || hwif->drives[0].busy || hwif->drives[1].busy) { + restore_flags(flags); + return; + } + hwif->present = 0; + hwgroup = hwif->hwgroup; + + /* + * free the irq if we were the only hwif using it + */ + g = hwgroup->hwif; + do { + if (g->irq == hwif->irq) + ++irq_count; + g = g->next; + } while (g != hwgroup->hwif); + if (irq_count == 1) + free_irq(hwif->irq, hwgroup); + + /* + * Note that we only release the standard ports, + * and do not even try to handle any extra ports + * allocated for weird IDE interface chipsets. + */ + release_region(hwif->io_base, 8); + release_region(hwif->ctl_port, 1); + + /* + * Remove us from the hwgroup, and free + * the hwgroup if we were the only member + */ + while (hwgroup->hwif->next != hwif) + hwgroup->hwif = hwgroup->hwif->next; + hwgroup->hwif->next = hwif->next; + if (hwgroup->hwif == hwif) + hwgroup->hwif = hwif->next; + if (hwgroup->next_hwif == hwif) + hwgroup->next_hwif = hwif->next; + if (hwgroup->hwif == hwif) + kfree(hwgroup); + + /* + * Remove us from the kernel's knowledge + */ + unregister_blkdev(hwif->major, hwif->name); + kfree(blksize_size[hwif->major]); + blk_dev[hwif->major].request_fn = NULL; + blksize_size[hwif->major] = NULL; + for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) + if (*gdp == hwif->gd) + break; + if (*gdp == NULL) + printk("gd not in disk chain!\n"); + else { + gd = *gdp; *gdp = gd->next; + kfree(gd->sizes); + kfree(gd->part); + kfree(gd); + } + init_hwif_data (index); /* restore hwif data to pristine status */ + restore_flags(flags); +} +#endif /* CONFIG_BLK_DEV_IDE_PCMCIA */ diff --git a/linux/src/drivers/block/ide.h b/linux/src/drivers/block/ide.h new file mode 100644 index 00000000..5310ac8f --- /dev/null +++ b/linux/src/drivers/block/ide.h @@ -0,0 +1,747 @@ +/* + * linux/drivers/block/ide.h + * + * Copyright (C) 1994, 1995 Linus Torvalds & authors + */ + +#include <linux/config.h> + +/* + * This is the multiple IDE interface driver, as evolved from hd.c. + * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15). + * There can be up to two drives per interface, as per the ATA-2 spec. + * + * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64 + * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64 + * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64 + * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64 + */ + +/****************************************************************************** + * IDE driver configuration options (play with these as desired): + * + * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary + */ +#undef REALLY_FAST_IO /* define if ide ports are perfect */ +#define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */ + +#ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */ +#define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */ +#endif +#ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */ +#define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */ +#endif +#ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */ +#define DISK_RECOVERY_TIME 0 /* for hardware that needs it */ +#endif +#ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */ +#define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */ +#endif +#ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */ +#define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */ +#endif +#ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */ +#define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */ +#endif + +#ifdef CONFIG_BLK_DEV_CMD640 +#if 0 /* change to 1 when debugging cmd640 problems */ +void cmd640_dump_regs (void); +#define CMD640_DUMP_REGS cmd640_dump_regs() /* for debugging cmd640 chipset */ +#endif +#endif /* CONFIG_BLK_DEV_CMD640 */ + +#if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE) || \ + defined(CONFIG_BLK_DEV_IDEFLOPPY) || defined(CONFIG_BLK_DEV_IDESCSI) +#define CONFIG_BLK_DEV_IDEATAPI 1 +#endif + +/* + * IDE_DRIVE_CMD is used to implement many features of the hdparm utility + */ +#define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/ + +/* + * "No user-serviceable parts" beyond this point :) + *****************************************************************************/ + +#if defined(CONFIG_BLK_DEV_IDESCSI) && !defined(CONFIG_SCSI) +#error "SCSI must also be selected" +#endif + +typedef unsigned char byte; /* used everywhere */ + +/* + * Probably not wise to fiddle with these + */ +#define ERROR_MAX 8 /* Max read/write errors per sector */ +#define ERROR_RESET 3 /* Reset controller every 4th retry */ +#define ERROR_RECAL 1 /* Recalibrate every 2nd retry */ + +/* + * Ensure that various configuration flags have compatible settings + */ +#ifdef REALLY_SLOW_IO +#undef REALLY_FAST_IO +#endif + +/* + * Definitions for accessing IDE controller registers + */ + +#define HWIF(drive) ((ide_hwif_t *)((drive)->hwif)) +#define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup)) + +#define IDE_DATA_OFFSET (0) +#define IDE_ERROR_OFFSET (1) +#define IDE_NSECTOR_OFFSET (2) +#define IDE_SECTOR_OFFSET (3) +#define IDE_LCYL_OFFSET (4) +#define IDE_HCYL_OFFSET (5) +#define IDE_SELECT_OFFSET (6) +#define IDE_STATUS_OFFSET (7) +#define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET +#define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET + +#define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET) +#define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET) +#define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET) +#define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET) +#define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET) +#define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET) +#define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET) +#define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET) +#define IDE_CONTROL_REG (HWIF(drive)->ctl_port) +#define IDE_FEATURE_REG IDE_ERROR_REG +#define IDE_COMMAND_REG IDE_STATUS_REG +#define IDE_ALTSTATUS_REG IDE_CONTROL_REG +#define IDE_IREASON_REG IDE_NSECTOR_REG +#define IDE_BCOUNTL_REG IDE_LCYL_REG +#define IDE_BCOUNTH_REG IDE_HCYL_REG + +#ifdef REALLY_FAST_IO +#define OUT_BYTE(b,p) outb((b),(p)) +#define IN_BYTE(p) (byte)inb(p) +#else +#define OUT_BYTE(b,p) outb_p((b),(p)) +#define IN_BYTE(p) (byte)inb_p(p) +#endif /* REALLY_FAST_IO */ + +#define GET_ERR() IN_BYTE(IDE_ERROR_REG) +#define GET_STAT() IN_BYTE(IDE_STATUS_REG) +#define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good)) +#define BAD_R_STAT (BUSY_STAT | ERR_STAT) +#define BAD_W_STAT (BAD_R_STAT | WRERR_STAT) +#define BAD_STAT (BAD_R_STAT | DRQ_STAT) +#define DRIVE_READY (READY_STAT | SEEK_STAT) +#define DATA_READY (DRQ_STAT) + +/* + * Some more useful definitions + */ +#define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */ +#define MAJOR_NAME IDE_MAJOR_NAME +#define PARTN_BITS 6 /* number of minor dev bits for partitions */ +#define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */ +#define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */ +#ifndef MAX_HWIFS +#define MAX_HWIFS 4 /* an arbitrary, but realistic limit */ +#endif +#define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */ + +/* + * Timeouts for various operations: + */ +#define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */ +#ifdef CONFIG_APM +#define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */ +#else +#define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */ +#endif /* CONFIG_APM */ +#define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */ +#define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */ +#define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */ + +#if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE) +#define SELECT_DRIVE(hwif,drive) \ +{ \ + if (hwif->selectproc) \ + hwif->selectproc(drive); \ + else \ + OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); \ +} +#else +#define SELECT_DRIVE(hwif,drive) OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); +#endif /* CONFIG_BLK_DEV_HT6560B || CONFIG_BLK_DEV_PROMISE */ + +#ifdef CONFIG_BLK_DEV_IDETAPE +#include "ide-tape.h" +#endif /* CONFIG_BLK_DEV_IDETAPE */ + +#ifdef CONFIG_BLK_DEV_IDECD + +struct atapi_request_sense { + unsigned char error_code : 7; + unsigned char valid : 1; + byte reserved1; + unsigned char sense_key : 4; + unsigned char reserved2 : 1; + unsigned char ili : 1; + unsigned char reserved3 : 2; + byte info[4]; + byte sense_len; + byte command_info[4]; + byte asc; + byte ascq; + byte fru; + byte sense_key_specific[3]; +}; + +struct packet_command { + char *buffer; + int buflen; + int stat; + struct atapi_request_sense *sense_data; + unsigned char c[12]; +}; + + +/* Structure of a MSF cdrom address. */ +struct atapi_msf { + byte reserved; + byte minute; + byte second; + byte frame; +}; + + +/* Space to hold the disk TOC. */ + +#define MAX_TRACKS 99 +struct atapi_toc_header { + unsigned short toc_length; + byte first_track; + byte last_track; +}; + +struct atapi_toc_entry { + byte reserved1; + unsigned control : 4; + unsigned adr : 4; + byte track; + byte reserved2; + union { + unsigned lba; + struct atapi_msf msf; + } addr; +}; + +struct atapi_toc { + int last_session_lba; + int xa_flag; + unsigned capacity; + struct atapi_toc_header hdr; + struct atapi_toc_entry ent[MAX_TRACKS+1]; + /* One extra for the leadout. */ +}; + + +/* This structure is annoyingly close to, but not identical with, + the cdrom_subchnl structure from cdrom.h. */ +struct atapi_cdrom_subchnl +{ + u_char acdsc_reserved; + u_char acdsc_audiostatus; + u_short acdsc_length; + u_char acdsc_format; + + u_char acdsc_adr: 4; + u_char acdsc_ctrl: 4; + u_char acdsc_trk; + u_char acdsc_ind; + union { + struct atapi_msf msf; + int lba; + } acdsc_absaddr; + union { + struct atapi_msf msf; + int lba; + } acdsc_reladdr; +}; + + +/* Extra per-device info for cdrom drives. */ +struct cdrom_info { + + /* Buffer for table of contents. NULL if we haven't allocated + a TOC buffer for this device yet. */ + + struct atapi_toc *toc; + + /* Sector buffer. If a read request wants only the first part + of a cdrom block, we cache the rest of the block here, + in the expectation that that data is going to be wanted soon. + SECTOR_BUFFERED is the number of the first buffered sector, + and NSECTORS_BUFFERED is the number of sectors in the buffer. + Before the buffer is allocated, we should have + SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */ + + unsigned long sector_buffered; + unsigned long nsectors_buffered; + char *sector_buffer; + + /* The result of the last successful request sense command + on this device. */ + struct atapi_request_sense sense_data; + + int max_sectors; +}; + +#endif /* CONFIG_BLK_DEV_IDECD */ + +/* + * Now for the data we need to maintain per-drive: ide_drive_t + */ + +typedef enum {ide_disk, ide_cdrom, ide_tape, ide_floppy, ide_scsi} ide_media_t; + +typedef union { + unsigned all : 8; /* all of the bits together */ + struct { + unsigned set_geometry : 1; /* respecify drive geometry */ + unsigned recalibrate : 1; /* seek to cyl 0 */ + unsigned set_multmode : 1; /* set multmode count */ + unsigned set_tune : 1; /* tune interface for drive */ + unsigned mc : 1; /* acknowledge media change */ + unsigned reserved : 3; /* unused */ + } b; + } special_t; + +typedef union { + unsigned all : 8; /* all of the bits together */ + struct { + unsigned head : 4; /* always zeros here */ + unsigned unit : 1; /* drive select number, 0 or 1 */ + unsigned bit5 : 1; /* always 1 */ + unsigned lba : 1; /* using LBA instead of CHS */ + unsigned bit7 : 1; /* always 1 */ + } b; + } select_t; + +typedef struct ide_drive_s { + special_t special; /* special action flags */ + unsigned present : 1; /* drive is physically present */ + unsigned noprobe : 1; /* from: hdx=noprobe */ + unsigned keep_settings : 1; /* restore settings after drive reset */ + unsigned busy : 1; /* currently doing revalidate_disk() */ + unsigned removable : 1; /* 1 if need to do check_media_change */ + unsigned using_dma : 1; /* disk is using dma for read/write */ + unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */ + unsigned unmask : 1; /* flag: okay to unmask other irqs */ + unsigned no_unmask : 1; /* disallow setting unmask bit */ + unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */ + unsigned nobios : 1; /* flag: do not probe bios for drive */ + unsigned slow : 1; /* flag: slow data port */ + unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */ +#if FAKE_FDISK_FOR_EZDRIVE + unsigned remap_0_to_1 : 1; /* flag: partitioned with ezdrive */ +#endif /* FAKE_FDISK_FOR_EZDRIVE */ + unsigned no_geom : 1; /* flag: do not set geometry */ + ide_media_t media; /* disk, cdrom, tape, floppy */ + select_t select; /* basic drive/head select reg value */ + byte ctl; /* "normal" value for IDE_CONTROL_REG */ + byte ready_stat; /* min status value for drive ready */ + byte mult_count; /* current multiple sector setting */ + byte mult_req; /* requested multiple sector setting */ + byte tune_req; /* requested drive tuning setting */ + byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */ + byte bad_wstat; /* used for ignoring WRERR_STAT */ + byte sect0; /* offset of first sector for DM6:DDO */ + byte usage; /* current "open()" count for drive */ + byte head; /* "real" number of heads */ + byte sect; /* "real" sectors per track */ + byte bios_head; /* BIOS/fdisk/LILO number of heads */ + byte bios_sect; /* BIOS/fdisk/LILO sectors per track */ + unsigned short bios_cyl; /* BIOS/fdisk/LILO number of cyls */ + unsigned short cyl; /* "real" number of cyls */ + void *hwif; /* actually (ide_hwif_t *) */ + struct wait_queue *wqueue; /* used to wait for drive in open() */ + struct hd_driveid *id; /* drive model identification info */ + struct hd_struct *part; /* drive partition table */ + char name[4]; /* drive name, such as "hda" */ +#ifdef CONFIG_BLK_DEV_IDECD + struct cdrom_info cdrom_info; /* for ide-cd.c */ +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + idetape_tape_t tape; /* for ide-tape.c */ +#endif /* CONFIG_BLK_DEV_IDETAPE */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + void *floppy; /* for ide-floppy.c */ +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + void *scsi; /* for ide-scsi.c */ +#endif /* CONFIG_BLK_DEV_IDESCSI */ + byte ide_scsi; /* use ide-scsi driver */ + } ide_drive_t; + +/* + * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive. + * + * The caller is assumed to have selected the drive and programmed the drive's + * sector address using CHS or LBA. All that remains is to prepare for DMA + * and then issue the actual read/write DMA/PIO command to the drive. + * + * Returns 0 if all went well. + * Returns 1 if DMA read/write could not be started, in which case the caller + * should either try again later, or revert to PIO for the current request. + */ +typedef enum { ide_dma_read = 0, ide_dma_write = 1, + ide_dma_abort = 2, ide_dma_check = 3, + ide_dma_status_bad = 4, ide_dma_transferred = 5, + ide_dma_begin = 6 } + ide_dma_action_t; + +typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *); + + +/* + * An ide_tuneproc_t() is used to set the speed of an IDE interface + * to a particular PIO mode. The "byte" parameter is used + * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255 + * indicates that the interface driver should "auto-tune" the PIO mode + * according to the drive capabilities in drive->id; + * + * Not all interface types support tuning, and not all of those + * support all possible PIO settings. They may silently ignore + * or round values as they see fit. + */ +typedef void (ide_tuneproc_t)(ide_drive_t *, byte); + +/* + * This is used to provide HT6560B & PROMISE interface support. + */ +typedef void (ide_selectproc_t) (ide_drive_t *); + +/* + * hwif_chipset_t is used to keep track of the specific hardware + * chipset used by each IDE interface, if known. + */ +typedef enum { ide_unknown, ide_generic, ide_triton, + ide_cmd640, ide_dtc2278, ide_ali14xx, + ide_qd6580, ide_umc8672, ide_ht6560b, + ide_promise, ide_promise_udma } + hwif_chipset_t; + +typedef struct hwif_s { + struct hwif_s *next; /* for linked-list in ide_hwgroup_t */ + void *hwgroup; /* actually (ide_hwgroup_t *) */ + unsigned short io_base; /* base io port addr */ + unsigned short ctl_port; /* usually io_base+0x206 */ + ide_drive_t drives[MAX_DRIVES]; /* drive info */ + struct gendisk *gd; /* gendisk structure */ + ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */ +#if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE) + ide_selectproc_t *selectproc; /* tweaks hardware to select drive */ +#endif + ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */ + unsigned long *dmatable; /* dma physical region descriptor table */ + unsigned short dma_base; /* base addr for dma ports (triton) */ + byte irq; /* our irq number */ + byte major; /* our major number */ + char name[5]; /* name of interface, eg. "ide0" */ + byte index; /* 0 for ide0; 1 for ide1; ... */ + hwif_chipset_t chipset; /* sub-module for tuning.. */ + unsigned noprobe : 1; /* don't probe for this interface */ + unsigned present : 1; /* this interface exists */ + unsigned serialized : 1; /* serialized operation with mate hwif */ + unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */ +#ifdef CONFIG_BLK_DEV_PROMISE + unsigned is_promise2: 1; /* 2nd i/f on promise DC4030 */ +#endif /* CONFIG_BLK_DEV_PROMISE */ +#if (DISK_RECOVERY_TIME > 0) + unsigned long last_time; /* time when previous rq was done */ +#endif +#ifdef CONFIG_BLK_DEV_IDECD + struct request request_sense_request; /* from ide-cd.c */ + struct packet_command request_sense_pc; /* from ide-cd.c */ +#endif /* CONFIG_BLK_DEV_IDECD */ +#ifdef CONFIG_BLK_DEV_IDETAPE + ide_drive_t *tape_drive; /* Pointer to the tape on this interface */ +#endif /* CONFIG_BLK_DEV_IDETAPE */ + } ide_hwif_t; + +/* + * internal ide interrupt handler type + */ +typedef void (ide_handler_t)(ide_drive_t *); + +typedef struct hwgroup_s { + ide_handler_t *handler;/* irq handler, if active */ + ide_drive_t *drive; /* current drive */ + ide_hwif_t *hwif; /* ptr to current hwif in linked-list */ + ide_hwif_t *next_hwif; /* next selected hwif (for tape) */ + struct request *rq; /* current request */ + struct timer_list timer; /* failsafe timer */ + struct request wrq; /* local copy of current write rq */ + unsigned long poll_timeout; /* timeout value during long polls */ + int active; /* set when servicing requests */ + } ide_hwgroup_t; + +/* + * ide_hwifs[] is the master data structure used to keep track + * of just about everything in ide.c. Whenever possible, routines + * should be using pointers to a drive (ide_drive_t *) or + * pointers to a hwif (ide_hwif_t *), rather than indexing this + * structure directly (the allocation/layout may change!). + * + */ +#ifndef _IDE_C +extern ide_hwif_t ide_hwifs[]; /* master data repository */ +#endif + +/* + * One final include file, which references some of the data/defns from above + */ +#define IDE_DRIVER /* "parameter" for blk.h */ +#include <linux/blk.h> + +#if (DISK_RECOVERY_TIME > 0) +void ide_set_recovery_timer (ide_hwif_t *); +#define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive) +#else +#define SET_RECOVERY_TIMER(drive) +#endif + +/* + * This is used for (nearly) all data transfers from the IDE interface + */ +void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount); + +/* + * This is used for (nearly) all data transfers to the IDE interface + */ +void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount); + +/* + * This is used for (nearly) all ATAPI data transfers from/to the IDE interface + */ +void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount); +void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount); + +/* + * This is used on exit from the driver, to designate the next irq handler + * and also to start the safety timer. + */ +void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout); + +/* + * Error reporting, in human readable form (luxurious, but a memory hog). + */ +byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat); + +/* + * ide_error() takes action based on the error returned by the controller. + * The calling function must return afterwards, to restart the request. + */ +void ide_error (ide_drive_t *drive, const char *msg, byte stat); + +/* + * ide_fixstring() cleans up and (optionally) byte-swaps a text string, + * removing leading/trailing blanks and compressing internal blanks. + * It is primarily used to tidy up the model name/number fields as + * returned by the WIN_[P]IDENTIFY commands. + */ +void ide_fixstring (byte *s, const int bytecount, const int byteswap); + +/* + * This routine busy-waits for the drive status to be not "busy". + * It then checks the status for all of the "good" bits and none + * of the "bad" bits, and if all is okay it returns 0. All other + * cases return 1 after invoking ide_error() -- caller should return. + * + */ +int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout); + +/* + * This routine is called from the partition-table code in genhd.c + * to "convert" a drive to a logical geometry with fewer than 1024 cyls. + * + * The second parameter, "xparm", determines exactly how the translation + * will be handled: + * 0 = convert to CHS with fewer than 1024 cyls + * using the same method as Ontrack DiskManager. + * 1 = same as "0", plus offset everything by 63 sectors. + * -1 = similar to "0", plus redirect sector 0 to sector 1. + * >1 = convert to a CHS geometry with "xparm" heads. + * + * Returns 0 if the translation was not possible, if the device was not + * an IDE disk drive, or if a geometry was "forced" on the commandline. + * Returns 1 if the geometry translation was successful. + */ +int ide_xlate_1024 (kdev_t, int, const char *); + +/* + * Start a reset operation for an IDE interface. + * The caller should return immediately after invoking this. + */ +void ide_do_reset (ide_drive_t *); + +/* + * This function is intended to be used prior to invoking ide_do_drive_cmd(). + */ +void ide_init_drive_cmd (struct request *rq); + +/* + * "action" parameter type for ide_do_drive_cmd() below. + */ +typedef enum + {ide_wait, /* insert rq at end of list, and wait for it */ + ide_next, /* insert rq immediately after current request */ + ide_preempt, /* insert rq in front of current request */ + ide_end} /* insert rq at end of list, but don't wait for it */ + ide_action_t; + +/* + * This function issues a special IDE device request + * onto the request queue. + * + * If action is ide_wait, then the rq is queued at the end of the + * request queue, and the function sleeps until it has been processed. + * This is for use when invoked from an ioctl handler. + * + * If action is ide_preempt, then the rq is queued at the head of + * the request queue, displacing the currently-being-processed + * request and this function returns immediately without waiting + * for the new rq to be completed. This is VERY DANGEROUS, and is + * intended for careful use by the ATAPI tape/cdrom driver code. + * + * If action is ide_next, then the rq is queued immediately after + * the currently-being-processed-request (if any), and the function + * returns without waiting for the new rq to be completed. As above, + * This is VERY DANGEROUS, and is intended for careful use by the + * ATAPI tape/cdrom driver code. + * + * If action is ide_end, then the rq is queued at the end of the + * request queue, and the function returns immediately without waiting + * for the new rq to be completed. This is again intended for careful + * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c, + * when operating in the pipelined operation mode). + */ +int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action); + +/* + * Clean up after success/failure of an explicit drive cmd. + * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD). + */ +void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err); + +/* + * ide_system_bus_speed() returns what we think is the system VESA/PCI + * bus speed (in Mhz). This is used for calculating interface PIO timings. + * The default is 40 for known PCI systems, 50 otherwise. + * The "idebus=xx" parameter can be used to override this value. + */ +int ide_system_bus_speed (void); + +/* + * ide_multwrite() transfers a block of up to mcount sectors of data + * to a drive as part of a disk multwrite operation. + */ +void ide_multwrite (ide_drive_t *drive, unsigned int mcount); + +#ifdef CONFIG_BLK_DEV_IDECD +/* + * These are routines in ide-cd.c invoked from ide.c + */ +void ide_do_rw_cdrom (ide_drive_t *, unsigned long); +int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long); +int ide_cdrom_check_media_change (ide_drive_t *); +int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *); +void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *); +void ide_cdrom_setup (ide_drive_t *); +#endif /* CONFIG_BLK_DEV_IDECD */ + +#ifdef CONFIG_BLK_DEV_IDETAPE + +/* + * Functions in ide-tape.c which are invoked from ide.c: + */ + +/* + * idetape_identify_device is called during device probing stage to + * probe for an ide atapi tape drive and to initialize global variables + * in ide-tape.c which provide the link between the character device + * and the corresponding block device. + * + * Returns 1 if an ide tape was detected and is supported. + * Returns 0 otherwise. + */ + +int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id); + +/* + * idetape_setup is called a bit later than idetape_identify_device, + * during the search for disk partitions, to initialize various tape + * state variables in ide_drive_t *drive. + */ + +void idetape_setup (ide_drive_t *drive); + +/* + * idetape_do_request is our request function. It is called by ide.c + * to process a new request. + */ + +void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); + +/* + * idetape_end_request is used to finish servicing a request, and to + * insert a pending pipeline request into the main device queue. + */ + +void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup); + +/* + * Block device interface functions. + */ + +int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg); +int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive); +void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive); + +/* + * idetape_register_chrdev initializes the character device interface to + * the ide tape drive. + */ + +void idetape_register_chrdev (void); + +#endif /* CONFIG_BLK_DEV_IDETAPE */ + +#ifdef CONFIG_BLK_DEV_IDEFLOPPY +int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id); +void idefloppy_setup (ide_drive_t *drive); +void idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); +void idefloppy_end_request (byte uptodate, ide_hwgroup_t *hwgroup); +int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg); +int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive); +void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive); +int idefloppy_media_change (ide_drive_t *drive); +unsigned long idefloppy_capacity (ide_drive_t *drive); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ + +#ifdef CONFIG_BLK_DEV_IDESCSI +void idescsi_setup (ide_drive_t *drive); +void idescsi_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); +void idescsi_end_request (byte uptodate, ide_hwgroup_t *hwgroup); +int idescsi_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); +int idescsi_open (struct inode *inode, struct file *filp, ide_drive_t *drive); +void idescsi_ide_release (struct inode *inode, struct file *filp, ide_drive_t *drive); +#endif /* CONFIG_BLK_DEV_IDESCSI */ + +#ifdef CONFIG_BLK_DEV_TRITON +void ide_init_triton (byte, byte); +void ide_init_promise (byte bus, byte fn, ide_hwif_t *hwif0, ide_hwif_t *hwif1, unsigned short dma); +#endif /* CONFIG_BLK_DEV_TRITON */ diff --git a/linux/src/drivers/block/ide_modes.h b/linux/src/drivers/block/ide_modes.h new file mode 100644 index 00000000..589fbfaa --- /dev/null +++ b/linux/src/drivers/block/ide_modes.h @@ -0,0 +1,226 @@ +#ifndef _IDE_MODES_H +#define _IDE_MODES_H +/* + * linux/drivers/block/ide_modes.h + * + * Copyright (C) 1996 Linus Torvalds, Igor Abramov, and Mark Lord + */ + +#include <linux/config.h> + +/* + * Shared data/functions for determining best PIO mode for an IDE drive. + * Most of this stuff originally lived in cmd640.c, and changes to the + * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid + * breaking the fragile cmd640.c support. + */ + +#if defined(CONFIG_BLK_DEV_CMD640) || defined(CONFIG_IDE_CHIPSETS) + +/* + * Standard (generic) timings for PIO modes, from ATA2 specification. + * These timings are for access to the IDE data port register *only*. + * Some drives may specify a mode, while also specifying a different + * value for cycle_time (from drive identification data). + */ +typedef struct ide_pio_timings_s { + int setup_time; /* Address setup (ns) minimum */ + int active_time; /* Active pulse (ns) minimum */ + int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */ +} ide_pio_timings_t; + +typedef struct ide_pio_data_s { + byte pio_mode; + byte use_iordy; + byte overridden; + byte blacklisted; + unsigned int cycle_time; +} ide_pio_data_t; + +#ifndef _IDE_C + +int ide_scan_pio_blacklist (char *model); +byte ide_get_best_pio_mode (ide_drive_t *drive, byte mode_wanted, byte max_mode, ide_pio_data_t *d); +extern const ide_pio_timings_t ide_pio_timings[6]; + +#else /* _IDE_C */ + +const ide_pio_timings_t ide_pio_timings[6] = { + { 70, 165, 600 }, /* PIO Mode 0 */ + { 50, 125, 383 }, /* PIO Mode 1 */ + { 30, 100, 240 }, /* PIO Mode 2 */ + { 30, 80, 180 }, /* PIO Mode 3 with IORDY */ + { 25, 70, 120 }, /* PIO Mode 4 with IORDY */ + { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */ +}; + +/* + * Black list. Some drives incorrectly report their maximal PIO mode, + * at least in respect to CMD640. Here we keep info on some known drives. + */ +static struct ide_pio_info { + const char *name; + int pio; +} ide_pio_blacklist [] = { +/* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */ + { "Conner Peripherals 540MB - CFS540A", 3 }, + + { "WDC AC2700", 3 }, + { "WDC AC2540", 3 }, + { "WDC AC2420", 3 }, + { "WDC AC2340", 3 }, + { "WDC AC2250", 0 }, + { "WDC AC2200", 0 }, + { "WDC AC21200", 4 }, + { "WDC AC2120", 0 }, + { "WDC AC2850", 3 }, + { "WDC AC1270", 3 }, + { "WDC AC1170", 1 }, + { "WDC AC1210", 1 }, + { "WDC AC280", 0 }, +/* { "WDC AC21000", 4 }, */ + { "WDC AC31000", 3 }, + { "WDC AC31200", 3 }, +/* { "WDC AC31600", 4 }, */ + + { "Maxtor 7131 AT", 1 }, + { "Maxtor 7171 AT", 1 }, + { "Maxtor 7213 AT", 1 }, + { "Maxtor 7245 AT", 1 }, + { "Maxtor 7345 AT", 1 }, + { "Maxtor 7546 AT", 3 }, + { "Maxtor 7540 AV", 3 }, + + { "SAMSUNG SHD-3121A", 1 }, + { "SAMSUNG SHD-3122A", 1 }, + { "SAMSUNG SHD-3172A", 1 }, + +/* { "ST51080A", 4 }, + * { "ST51270A", 4 }, + * { "ST31220A", 4 }, + * { "ST31640A", 4 }, + * { "ST32140A", 4 }, + * { "ST3780A", 4 }, + */ + { "ST5660A", 3 }, + { "ST3660A", 3 }, + { "ST3630A", 3 }, + { "ST3655A", 3 }, + { "ST3391A", 3 }, + { "ST3390A", 1 }, + { "ST3600A", 1 }, + { "ST3290A", 0 }, + { "ST3144A", 0 }, + + { "QUANTUM ELS127A", 0 }, + { "QUANTUM ELS170A", 0 }, + { "QUANTUM LPS240A", 0 }, + { "QUANTUM LPS210A", 3 }, + { "QUANTUM LPS270A", 3 }, + { "QUANTUM LPS365A", 3 }, + { "QUANTUM LPS540A", 3 }, + { "QUANTUM LIGHTNING 540A", 3 }, + { "QUANTUM LIGHTNING 730A", 3 }, + { "QUANTUM FIREBALL", 3 }, /* For models 540/640/1080/1280 */ + /* 1080A works fine in mode4 with triton */ + { NULL, 0 } +}; + +/* + * This routine searches the ide_pio_blacklist for an entry + * matching the start/whole of the supplied model name. + * + * Returns -1 if no match found. + * Otherwise returns the recommended PIO mode from ide_pio_blacklist[]. + */ +int ide_scan_pio_blacklist (char *model) +{ + struct ide_pio_info *p; + + for (p = ide_pio_blacklist; p->name != NULL; p++) { + if (strncmp(p->name, model, strlen(p->name)) == 0) + return p->pio; + } + return -1; +} + +/* + * This routine returns the recommended PIO settings for a given drive, + * based on the drive->id information and the ide_pio_blacklist[]. + * This is used by most chipset support modules when "auto-tuning". + */ + +/* + * Drive PIO mode auto selection + */ +byte ide_get_best_pio_mode (ide_drive_t *drive, byte mode_wanted, byte max_mode, ide_pio_data_t *d) +{ + int pio_mode; + int cycle_time = 0; + int use_iordy = 0; + struct hd_driveid* id = drive->id; + int overridden = 0; + int blacklisted = 0; + + if (mode_wanted != 255) { + pio_mode = mode_wanted; + } else if (!drive->id) { + pio_mode = 0; + } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) { + overridden = 1; + blacklisted = 1; + use_iordy = (pio_mode > 2); + } else { + pio_mode = id->tPIO; + if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ + pio_mode = 2; + overridden = 1; + } + if (id->field_valid & 2) { /* drive implements ATA2? */ + if (id->capability & 8) { /* drive supports use_iordy? */ + use_iordy = 1; + cycle_time = id->eide_pio_iordy; + if (id->eide_pio_modes & 7) { + overridden = 0; + if (id->eide_pio_modes & 4) + pio_mode = 5; + else if (id->eide_pio_modes & 2) + pio_mode = 4; + else + pio_mode = 3; + } + } else { + cycle_time = id->eide_pio; + } + } + + /* + * Conservative "downgrade" for all pre-ATA2 drives + */ + if (pio_mode && pio_mode < 4) { + pio_mode--; + overridden = 1; +#if 0 + use_iordy = (pio_mode > 2); +#endif + if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time) + cycle_time = 0; /* use standard timing */ + } + } + if (pio_mode > max_mode) { + pio_mode = max_mode; + cycle_time = 0; + } + if (d) { + d->pio_mode = pio_mode; + d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time; + d->use_iordy = use_iordy; + d->overridden = overridden; + d->blacklisted = blacklisted; + } + return pio_mode; +} + +#endif /* _IDE_C */ +#endif /* defined(CONFIG_BLK_DEV_CMD640) || defined(CONFIG_IDE_CHIPSETS) */ +#endif /* _IDE_MODES_H */ diff --git a/linux/src/drivers/block/rz1000.c b/linux/src/drivers/block/rz1000.c new file mode 100644 index 00000000..41b26f27 --- /dev/null +++ b/linux/src/drivers/block/rz1000.c @@ -0,0 +1,59 @@ +/* + * linux/drivers/block/rz1000.c Version 0.03 Mar 20, 1996 + * + * Copyright (C) 1995-1996 Linus Torvalds & author (see below) + */ + +/* + * Principal Author/Maintainer: mlord@pobox.com (Mark Lord) + * + * This file provides support for disabling the buggy read-ahead + * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards. + */ + +#undef REALLY_SLOW_IO /* most systems can safely undef this */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/blkdev.h> +#include <linux/hdreg.h> +#include <asm/io.h> +#include <linux/bios32.h> +#include <linux/pci.h> +#include "ide.h" + +static void ide_pci_access_error (int rc) +{ + printk("ide: pcibios access failed - %s\n", pcibios_strerror(rc)); +} + +void init_rz1000 (byte bus, byte fn) +{ + int rc; + unsigned short reg; + + printk("ide0: buggy RZ1000 interface: "); + if ((rc = pcibios_read_config_word (bus, fn, PCI_COMMAND, ®))) { + ide_pci_access_error (rc); + } else if (!(reg & 1)) { + printk("not enabled\n"); + } else { + if ((rc = pcibios_read_config_word(bus, fn, 0x40, ®)) + || (rc = pcibios_write_config_word(bus, fn, 0x40, reg & 0xdfff))) + { + ide_hwifs[0].drives[0].no_unmask = 1; + ide_hwifs[0].drives[1].no_unmask = 1; + ide_hwifs[1].drives[0].no_unmask = 1; + ide_hwifs[1].drives[1].no_unmask = 1; + ide_hwifs[0].serialized = 1; + ide_hwifs[1].serialized = 1; + ide_pci_access_error (rc); + printk("serialized, disabled unmasking\n"); + } else + printk("disabled read-ahead\n"); + } +} diff --git a/linux/src/drivers/block/triton.c b/linux/src/drivers/block/triton.c new file mode 100644 index 00000000..739b1b94 --- /dev/null +++ b/linux/src/drivers/block/triton.c @@ -0,0 +1,527 @@ +/* + * linux/drivers/block/triton.c Version 1.13 Aug 12, 1996 + * + * Copyright (c) 1995-1996 Mark Lord + * May be copied or modified under the terms of the GNU General Public License + */ + +/* + * This module provides support for the Bus Master IDE DMA function + * of the Intel PCI Triton I/II chipsets (i82371FB or i82371SB). + * + * Pretty much the same code will work for the OPTi "Viper" chipset. + * Look for DMA support for this in linux kernel 2.1.xx, when it appears. + * + * DMA is currently supported only for hard disk drives (not cdroms). + * + * Support for cdroms will likely be added at a later date, + * after broader experience has been obtained with hard disks. + * + * Up to four drives may be enabled for DMA, and the Triton chipset will + * (hopefully) arbitrate the PCI bus among them. Note that the i82371 chip + * provides a single "line buffer" for the BM IDE function, so performance of + * multiple (two) drives doing DMA simultaneously will suffer somewhat, + * as they contest for that resource bottleneck. This is handled transparently + * inside the i82371 chip. + * + * By default, DMA support is prepared for use, but is currently enabled only + * for drives which support multi-word DMA mode2 (mword2), or which are + * recognized as "good" (see table below). Drives with only mode0 or mode1 + * (single or multi) DMA should also work with this chipset/driver (eg. MC2112A) + * but are not enabled by default. Use "hdparm -i" to view modes supported + * by a given drive. + * + * The hdparm-2.4 (or later) utility can be used for manually enabling/disabling + * DMA support, but must be (re-)compiled against this kernel version or later. + * + * To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting. + * If problems arise, ide.c will disable DMA operation after a few retries. + * This error recovery mechanism works and has been extremely well exercised. + * + * IDE drives, depending on their vintage, may support several different modes + * of DMA operation. The boot-time modes are indicated with a "*" in + * the "hdparm -i" listing, and can be changed with *knowledgeable* use of + * the "hdparm -X" feature. There is seldom a need to do this, as drives + * normally power-up with their "best" PIO/DMA modes enabled. + * + * Testing was done with an ASUS P55TP4XE/100 system and the following drives: + * + * Quantum Fireball 1080A (1Gig w/83kB buffer), DMA mode2, PIO mode4. + * - DMA mode2 works well (7.4MB/sec), despite the tiny on-drive buffer. + * - This drive also does PIO mode4, at about the same speed as DMA mode2. + * An awesome drive for the price! + * + * Fujitsu M1606TA (1Gig w/256kB buffer), DMA mode2, PIO mode4. + * - DMA mode2 gives horrible performance (1.6MB/sec), despite the good + * size of the on-drive buffer and a boasted 10ms average access time. + * - PIO mode4 was better, but peaked at a mere 4.5MB/sec. + * + * Micropolis MC2112A (1Gig w/508kB buffer), drive pre-dates EIDE and ATA2. + * - DMA works fine (2.2MB/sec), probably due to the large on-drive buffer. + * - This older drive can also be tweaked for fastPIO (3.7MB/sec) by using + * maximum clock settings (5,4) and setting all flags except prefetch. + * + * Western Digital AC31000H (1Gig w/128kB buffer), DMA mode1, PIO mode3. + * - DMA does not work reliably. The drive appears to be somewhat tardy + * in deasserting DMARQ at the end of a sector. This is evident in + * the observation that WRITEs work most of the time, depending on + * cache-buffer occupancy, but multi-sector reads seldom work. + * + * Testing was done with a Gigabyte GA-586 ATE system and the following drive: + * (Uwe Bonnes - bon@elektron.ikp.physik.th-darmstadt.de) + * + * Western Digital AC31600H (1.6Gig w/128kB buffer), DMA mode2, PIO mode4. + * - much better than its 1Gig cousin, this drive is reported to work + * very well with DMA (7.3MB/sec). + * + * Other drives: + * + * Maxtor 7540AV (515Meg w/32kB buffer), DMA modes mword0/sword2, PIO mode3. + * - a budget drive, with budget performance, around 3MB/sec. + * + * Western Digital AC2850F (814Meg w/64kB buffer), DMA mode1, PIO mode3. + * - another "caviar" drive, similar to the AC31000, except that this one + * worked with DMA in at least one system. Throughput is about 3.8MB/sec + * for both DMA and PIO. + * + * Conner CFS850A (812Meg w/64kB buffer), DMA mode2, PIO mode4. + * - like most Conner models, this drive proves that even a fast interface + * cannot improve slow media. Both DMA and PIO peak around 3.5MB/sec. + * + * Maxtor 71260AT (1204Meg w/256kB buffer), DMA mword0/sword2, PIO mode3. + * - works with DMA, on some systems (but not always on others, eg. Dell), + * giving 3-4MB/sec performance, about the same as mode3. + * + * If you have any drive models to add, email your results to: mlord@pobox.com + * Keep an eye on /var/adm/messages for "DMA disabled" messages. + * + * Some people have reported trouble with Intel Zappa motherboards. + * This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0, + * available from ftp://ftp.intel.com/pub/bios/10004bs0.exe + * (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this). + * + * And, yes, Intel Zappa boards really *do* use the Triton IDE ports. + */ +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/blkdev.h> +#include <linux/hdreg.h> +#include <linux/pci.h> +#include <linux/bios32.h> + +#include <asm/io.h> +#include <asm/dma.h> + +#include "ide.h" + +#undef DISPLAY_TRITON_TIMINGS /* define this to display timings */ + +/* + * good_dma_drives() lists the model names (from "hdparm -i") + * of drives which do not support mword2 DMA but which are + * known to work fine with this interface under Linux. + */ +const char *good_dma_drives[] = {"Micropolis 2112A", + "CONNER CTMA 4000", + "CONNER CTT8000-A", + NULL}; + +/* + * Our Physical Region Descriptor (PRD) table should be large enough + * to handle the biggest I/O request we are likely to see. Since requests + * can have no more than 256 sectors, and since the typical blocksize is + * two sectors, we could get by with a limit of 128 entries here for the + * usual worst case. Most requests seem to include some contiguous blocks, + * further reducing the number of table entries required. + * + * The driver reverts to PIO mode for individual requests that exceed + * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling + * 100% of all crazy scenarios here is not necessary. + * + * As it turns out though, we must allocate a full 4KB page for this, + * so the two PRD tables (ide0 & ide1) will each get half of that, + * allowing each to have about 256 entries (8 bytes each) from this. + */ +#define PRD_BYTES 8 +#define PRD_ENTRIES (PAGE_SIZE / (2 * PRD_BYTES)) +#define DEFAULT_BMIBA 0xe800 /* in case BIOS did not init it */ + +/* + * dma_intr() is the handler for disk read/write DMA interrupts + */ +static void dma_intr (ide_drive_t *drive) +{ + byte stat, dma_stat; + int i; + struct request *rq = HWGROUP(drive)->rq; + unsigned short dma_base = HWIF(drive)->dma_base; + + dma_stat = inb(dma_base+2); /* get DMA status */ + outb(inb(dma_base)&~1, dma_base); /* stop DMA operation */ + stat = GET_STAT(); /* get drive status */ + if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) { + if ((dma_stat & 7) == 4) { /* verify good DMA status */ + rq = HWGROUP(drive)->rq; + for (i = rq->nr_sectors; i > 0;) { + i -= rq->current_nr_sectors; + ide_end_request(1, HWGROUP(drive)); + } + return; + } + printk("%s: bad DMA status: 0x%02x\n", drive->name, dma_stat); + } + sti(); + ide_error(drive, "dma_intr", stat); +} + +/* + * build_dmatable() prepares a dma request. + * Returns 0 if all went okay, returns 1 otherwise. + */ +static int build_dmatable (ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + struct buffer_head *bh = rq->bh; + unsigned long size, addr, *table = HWIF(drive)->dmatable; + unsigned int count = 0; + + do { + /* + * Determine addr and size of next buffer area. We assume that + * individual virtual buffers are always composed linearly in + * physical memory. For example, we assume that any 8kB buffer + * is always composed of two adjacent physical 4kB pages rather + * than two possibly non-adjacent physical 4kB pages. + */ + if (bh == NULL) { /* paging and tape requests have (rq->bh == NULL) */ + addr = virt_to_bus (rq->buffer); +#ifdef CONFIG_BLK_DEV_IDETAPE + if (drive->media == ide_tape) + size = drive->tape.pc->request_transfer; + else +#endif /* CONFIG_BLK_DEV_IDETAPE */ + size = rq->nr_sectors << 9; + } else { + /* group sequential buffers into one large buffer */ + addr = virt_to_bus (bh->b_data); + size = bh->b_size; + while ((bh = bh->b_reqnext) != NULL) { + if ((addr + size) != virt_to_bus (bh->b_data)) + break; + size += bh->b_size; + } + } + + /* + * Fill in the dma table, without crossing any 64kB boundaries. + * We assume 16-bit alignment of all blocks. + */ + while (size) { + if (++count >= PRD_ENTRIES) { + printk("%s: DMA table too small\n", drive->name); + return 1; /* revert to PIO for this request */ + } else { + unsigned long bcount = 0x10000 - (addr & 0xffff); + if (bcount > size) + bcount = size; + *table++ = addr; + *table++ = bcount & 0xffff; + addr += bcount; + size -= bcount; + } + } + } while (bh != NULL); + if (count) { + *--table |= 0x80000000; /* set End-Of-Table (EOT) bit */ + return 0; + } + printk("%s: empty DMA table?\n", drive->name); + return 1; /* let the PIO routines handle this weirdness */ +} + +static int config_drive_for_dma (ide_drive_t *drive) +{ + const char **list; + struct hd_driveid *id = drive->id; + + if (id && (id->capability & 1)) { + /* Enable DMA on any drive that has UltraDMA (mode 0/1/2) enabled */ + if (id->field_valid & 4) /* UltraDMA */ + if ((id->dma_ultra & (id->dma_ultra >> 8) & 7)) { + drive->using_dma = 1; + return 0; /* dma enabled */ + } + /* Enable DMA on any drive that has mode2 DMA (multi or single) enabled */ + if (id->field_valid & 2) /* regular DMA */ + if ((id->dma_mword & 0x404) == 0x404 || (id->dma_1word & 0x404) == 0x404) { + drive->using_dma = 1; + return 0; /* dma enabled */ + } + /* Consult the list of known "good" drives */ + list = good_dma_drives; + while (*list) { + if (!strcmp(*list++,id->model)) { + drive->using_dma = 1; + return 0; /* DMA enabled */ + } + } + } + return 1; /* DMA not enabled */ +} + +/* + * triton_dmaproc() initiates/aborts DMA read/write operations on a drive. + * + * The caller is assumed to have selected the drive and programmed the drive's + * sector address using CHS or LBA. All that remains is to prepare for DMA + * and then issue the actual read/write DMA/PIO command to the drive. + * + * For ATAPI devices, we just prepare for DMA and return. The caller should + * then issue the packet command to the drive and call us again with + * ide_dma_begin afterwards. + * + * Returns 0 if all went well. + * Returns 1 if DMA read/write could not be started, in which case + * the caller should revert to PIO for the current request. + */ +static int triton_dmaproc (ide_dma_action_t func, ide_drive_t *drive) +{ + unsigned long dma_base = HWIF(drive)->dma_base; + unsigned int reading = (1 << 3); + + switch (func) { + case ide_dma_abort: + outb(inb(dma_base)&~1, dma_base); /* stop DMA */ + return 0; + case ide_dma_check: + return config_drive_for_dma (drive); + case ide_dma_write: + reading = 0; + case ide_dma_read: + break; + case ide_dma_status_bad: + return ((inb(dma_base+2) & 7) != 4); /* verify good DMA status */ + case ide_dma_transferred: +#if 0 + return (number of bytes actually transferred); +#else + return (0); +#endif + case ide_dma_begin: + outb(inb(dma_base)|1, dma_base); /* begin DMA */ + return 0; + default: + printk("triton_dmaproc: unsupported func: %d\n", func); + return 1; + } + if (build_dmatable (drive)) + return 1; + outl(virt_to_bus (HWIF(drive)->dmatable), dma_base + 4); /* PRD table */ + outb(reading, dma_base); /* specify r/w */ + outb(inb(dma_base+2)|0x06, dma_base+2); /* clear status bits */ +#ifdef CONFIG_BLK_DEV_IDEATAPI + if (drive->media != ide_disk) + return 0; +#endif /* CONFIG_BLK_DEV_IDEATAPI */ + ide_set_handler(drive, &dma_intr, WAIT_CMD); /* issue cmd to drive */ + OUT_BYTE(reading ? WIN_READDMA : WIN_WRITEDMA, IDE_COMMAND_REG); + outb(inb(dma_base)|1, dma_base); /* begin DMA */ + return 0; +} + +#ifdef DISPLAY_TRITON_TIMINGS +/* + * print_triton_drive_flags() displays the currently programmed options + * in the i82371 (Triton) for a given drive. + * + * If fastDMA is "no", then slow ISA timings are used for DMA data xfers. + * If fastPIO is "no", then slow ISA timings are used for PIO data xfers. + * If IORDY is "no", then IORDY is assumed to always be asserted. + * If PreFetch is "no", then data pre-fetch/post are not used. + * + * When "fastPIO" and/or "fastDMA" are "yes", then faster PCI timings and + * back-to-back 16-bit data transfers are enabled, using the sample_CLKs + * and recovery_CLKs (PCI clock cycles) timing parameters for that interface. + */ +static void print_triton_drive_flags (unsigned int unit, byte flags) +{ + printk(" %s ", unit ? "slave :" : "master:"); + printk( "fastDMA=%s", (flags&9) ? "on " : "off"); + printk(" PreFetch=%s", (flags&4) ? "on " : "off"); + printk(" IORDY=%s", (flags&2) ? "on " : "off"); + printk(" fastPIO=%s\n", ((flags&9)==1) ? "on " : "off"); +} +#endif /* DISPLAY_TRITON_TIMINGS */ + +static void init_triton_dma (ide_hwif_t *hwif, unsigned short base) +{ + static unsigned long dmatable = 0; + + printk(" %s: BM-DMA at 0x%04x-0x%04x", hwif->name, base, base+7); + if (check_region(base, 8)) { + printk(" -- ERROR, PORTS ALREADY IN USE"); + } else { + request_region(base, 8, "IDE DMA"); + hwif->dma_base = base; + if (!dmatable) { + /* + * The BM-DMA uses a full 32-bits, so we can + * safely use __get_free_page() here instead + * of __get_dma_pages() -- no ISA limitations. + */ + dmatable = __get_free_pages(GFP_KERNEL, 1, 0); + } + if (dmatable) { + hwif->dmatable = (unsigned long *) dmatable; + dmatable += (PRD_ENTRIES * PRD_BYTES); + outl(virt_to_bus(hwif->dmatable), base + 4); + hwif->dmaproc = &triton_dmaproc; + } + } + printk("\n"); +} + +/* + * ide_init_triton() prepares the IDE driver for DMA operation. + * This routine is called once, from ide.c during driver initialization, + * for each triton chipset which is found (unlikely to be more than one). + */ +void ide_init_triton (byte bus, byte fn) +{ + int rc = 0, h; + int dma_enabled = 0; + unsigned short pcicmd; + unsigned int bmiba, timings; + + printk("ide: i82371 PIIX (Triton) on PCI bus %d function %d\n", bus, fn); + /* + * See if IDE and BM-DMA features are enabled: + */ + if ((rc = pcibios_read_config_word(bus, fn, 0x04, &pcicmd))) + goto quit; + if ((pcicmd & 1) == 0) { + printk("ide: ports are not enabled (BIOS)\n"); + goto quit; + } + if ((pcicmd & 4) == 0) { + printk("ide: BM-DMA feature is not enabled (BIOS)\n"); + } else { + /* + * Get the bmiba base address + */ + int try_again = 1; + do { + if ((rc = pcibios_read_config_dword(bus, fn, 0x20, &bmiba))) + goto quit; + bmiba &= 0xfff0; /* extract port base address */ + if (bmiba) { + dma_enabled = 1; + break; + } else { + printk("ide: BM-DMA base register is invalid (0x%04x, PnP BIOS problem)\n", bmiba); + if (inb(DEFAULT_BMIBA) != 0xff || !try_again) + break; + printk("ide: setting BM-DMA base register to 0x%04x\n", DEFAULT_BMIBA); + if ((rc = pcibios_write_config_word(bus, fn, 0x04, pcicmd&~1))) + goto quit; + rc = pcibios_write_config_dword(bus, fn, 0x20, DEFAULT_BMIBA|1); + if (pcibios_write_config_word(bus, fn, 0x04, pcicmd|5) || rc) + goto quit; + } + } while (try_again--); + } + + /* + * See if ide port(s) are enabled + */ + if ((rc = pcibios_read_config_dword(bus, fn, 0x40, &timings))) + goto quit; + if (!(timings & 0x80008000)) { + printk("ide: neither port is enabled\n"); + goto quit; + } + + /* + * Save the dma_base port addr for each interface + */ + for (h = 0; h < MAX_HWIFS; ++h) { +#ifdef DISPLAY_TRITON_TIMINGS + byte s_clks, r_clks; + unsigned short devid; +#endif /* DISPLAY_TRITON_TIMINGS */ + ide_hwif_t *hwif = &ide_hwifs[h]; + unsigned short time; + if (hwif->io_base == 0x1f0) { + time = timings & 0xffff; + if ((time & 0x8000) == 0) /* interface enabled? */ + continue; + hwif->chipset = ide_triton; + if (dma_enabled) + init_triton_dma(hwif, bmiba); + } else if (hwif->io_base == 0x170) { + time = timings >> 16; + if ((time & 0x8000) == 0) /* interface enabled? */ + continue; + hwif->chipset = ide_triton; + if (dma_enabled) + init_triton_dma(hwif, bmiba + 8); + } else + continue; +#ifdef DISPLAY_TRITON_TIMINGS + s_clks = ((~time >> 12) & 3) + 2; + r_clks = ((~time >> 8) & 3) + 1; + printk(" %s timing: (0x%04x) sample_CLKs=%d, recovery_CLKs=%d\n", + hwif->name, time, s_clks, r_clks); + if ((time & 0x40) && !pcibios_read_config_word(bus, fn, 0x02, &devid) + && devid == PCI_DEVICE_ID_INTEL_82371SB_1) + { + byte stime; + if (pcibios_read_config_byte(bus, fn, 0x44, &stime)) { + if (hwif->io_base == 0x1f0) { + s_clks = ~stime >> 6; + r_clks = ~stime >> 4; + } else { + s_clks = ~stime >> 2; + r_clks = ~stime; + } + s_clks = (s_clks & 3) + 2; + r_clks = (r_clks & 3) + 1; + printk(" slave: sample_CLKs=%d, recovery_CLKs=%d\n", + s_clks, r_clks); + } + } + print_triton_drive_flags (0, time & 0xf); + print_triton_drive_flags (1, (time >> 4) & 0xf); +#endif /* DISPLAY_TRITON_TIMINGS */ + } + +quit: if (rc) printk("ide: pcibios access failed - %s\n", pcibios_strerror(rc)); +} + +void ide_init_promise (byte bus, byte fn, ide_hwif_t *hwif0, ide_hwif_t *hwif1, unsigned short dma) +{ + int rc; + unsigned short pcicmd; + unsigned int bmiba = 0; + + printk("ide: Enabling DMA for Promise Technology IDE Ultra-DMA 33 on PCI bus %d function %d, port 0x%04x\n", bus, fn, dma); + if ((rc = pcibios_read_config_word(bus, fn, 0x04, &pcicmd)) || (pcicmd & 1) == 0 || (pcicmd & 4) == 0) + goto abort; + if ((rc = pcibios_read_config_dword(bus, fn, 0x20, &bmiba))) + goto abort; + bmiba &= 0xfff0; /* extract port base address */ + if (bmiba != dma || !bmiba) + goto abort; + hwif0->chipset = ide_promise_udma; + hwif1->chipset = ide_promise_udma; + init_triton_dma(hwif0, bmiba); + init_triton_dma(hwif1, bmiba + 0x08); + return; +abort: + printk(KERN_WARNING "ide: Promise/33 not configured correctly (BIOS)\n"); +} |