aboutsummaryrefslogtreecommitdiff
path: root/i386/i386at/gpl/linux/net/smc-ultra.c
diff options
context:
space:
mode:
authorThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
committerThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
commitf07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch)
tree12b07c7e578fc1a5f53dbfde2632408491ff2a70 /i386/i386at/gpl/linux/net/smc-ultra.c
downloadgnumach-f07a4c844da9f0ecae5bbee1ab94be56505f26f7.tar.gz
gnumach-f07a4c844da9f0ecae5bbee1ab94be56505f26f7.tar.bz2
gnumach-f07a4c844da9f0ecae5bbee1ab94be56505f26f7.zip
Initial source
Diffstat (limited to 'i386/i386at/gpl/linux/net/smc-ultra.c')
-rw-r--r--i386/i386at/gpl/linux/net/smc-ultra.c419
1 files changed, 419 insertions, 0 deletions
diff --git a/i386/i386at/gpl/linux/net/smc-ultra.c b/i386/i386at/gpl/linux/net/smc-ultra.c
new file mode 100644
index 00000000..f13cd0a7
--- /dev/null
+++ b/i386/i386at/gpl/linux/net/smc-ultra.c
@@ -0,0 +1,419 @@
+/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
+/*
+ Written 1993,1994,1995 by Donald Becker.
+
+ Copyright 1993 United States Government as represented by the
+ Director, National Security Agency.
+
+ This software may be used and distributed according to the terms
+ of the GNU Public License, incorporated herein by reference.
+
+ The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
+ Center of Excellence in Space Data and Information Sciences
+ Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+ This is a driver for the SMC Ultra and SMC EtherEZ ethercards.
+
+ This driver uses the cards in the 8390-compatible, shared memory mode.
+ Most of the run-time complexity is handled by the generic code in
+ 8390.c. The code in this file is responsible for
+
+ ultra_probe() Detecting and initializing the card.
+ ultra_probe1()
+
+ ultra_open() The card-specific details of starting, stopping
+ ultra_reset_8390() and resetting the 8390 NIC core.
+ ultra_close()
+
+ ultra_block_input() Routines for reading and writing blocks of
+ ultra_block_output() packet buffer memory.
+
+ This driver enables the shared memory only when doing the actual data
+ transfers to avoid a bug in early version of the card that corrupted
+ data transferred by a AHA1542.
+
+ This driver does not support the programmed-I/O data transfer mode of
+ the EtherEZ. That support (if available) is smc-ez.c. Nor does it
+ use the non-8390-compatible "Altego" mode. (No support currently planned.)
+
+ Changelog:
+
+ Paul Gortmaker : multiple card support for module users.
+*/
+
+static const char *version =
+ "smc-ultra.c:v1.12 1/18/95 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
+
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include "8390.h"
+
+/* A zero-terminated list of I/O addresses to be probed. */
+static unsigned int ultra_portlist[] =
+{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
+
+int ultra_probe(struct device *dev);
+int ultra_probe1(struct device *dev, int ioaddr);
+
+static int ultra_open(struct device *dev);
+static void ultra_reset_8390(struct device *dev);
+static void ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
+ int ring_page);
+static void ultra_block_input(struct device *dev, int count,
+ struct sk_buff *skb, int ring_offset);
+static void ultra_block_output(struct device *dev, int count,
+ const unsigned char *buf, const start_page);
+static int ultra_close_card(struct device *dev);
+
+
+#define START_PG 0x00 /* First page of TX buffer */
+
+#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
+#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
+#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
+#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
+#define ULTRA_IO_EXTENT 32
+
+/* Probe for the Ultra. This looks like a 8013 with the station
+ address PROM at I/O ports <base>+8 to <base>+13, with a checksum
+ following.
+*/
+#ifdef HAVE_DEVLIST
+struct netdev_entry ultra_drv =
+{"ultra", ultra_probe1, NETCARD_IO_EXTENT, netcard_portlist};
+#else
+
+int ultra_probe(struct device *dev)
+{
+ int i;
+ int base_addr = dev ? dev->base_addr : 0;
+
+ if (base_addr > 0x1ff) /* Check a single specified location. */
+ return ultra_probe1(dev, base_addr);
+ else if (base_addr != 0) /* Don't probe at all. */
+ return ENXIO;
+
+ for (i = 0; ultra_portlist[i]; i++) {
+ int ioaddr = ultra_portlist[i];
+ if (check_region(ioaddr, ULTRA_IO_EXTENT))
+ continue;
+ if (ultra_probe1(dev, ioaddr) == 0)
+ return 0;
+ }
+
+ return ENODEV;
+}
+#endif
+
+int ultra_probe1(struct device *dev, int ioaddr)
+{
+ int i;
+ int checksum = 0;
+ const char *model_name;
+ unsigned char eeprom_irq = 0;
+ static unsigned version_printed = 0;
+ /* Values from various config regs. */
+ unsigned char num_pages, irqreg, addr;
+ unsigned char idreg = inb(ioaddr + 7);
+ unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
+
+ /* Check the ID nibble. */
+ if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
+ && (idreg & 0xF0) != 0x40) /* SMC EtherEZ */
+ return ENODEV;
+
+ /* Select the station address register set. */
+ outb(reg4, ioaddr + 4);
+
+ for (i = 0; i < 8; i++)
+ checksum += inb(ioaddr + 8 + i);
+ if ((checksum & 0xff) != 0xFF)
+ return ENODEV;
+
+ /* We should have a "dev" from Space.c or the static module table. */
+ if (dev == NULL) {
+ printk("smc-ultra.c: Passed a NULL device.\n");
+ dev = init_etherdev(0, 0);
+ }
+
+ if (ei_debug && version_printed++ == 0)
+ printk(version);
+
+ model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
+
+ printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
+
+ for (i = 0; i < 6; i++)
+ printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
+
+ /* Switch from the station address to the alternate register set and
+ read the useful registers there. */
+ outb(0x80 | reg4, ioaddr + 4);
+
+ /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
+ outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
+ irqreg = inb(ioaddr + 0xd);
+ addr = inb(ioaddr + 0xb);
+
+ /* Switch back to the station address register set so that the MS-DOS driver
+ can find the card after a warm boot. */
+ outb(reg4, ioaddr + 4);
+
+ if (dev->irq < 2) {
+ unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
+ int irq;
+
+ /* The IRQ bits are split. */
+ irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
+
+ if (irq == 0) {
+ printk(", failed to detect IRQ line.\n");
+ return -EAGAIN;
+ }
+ dev->irq = irq;
+ eeprom_irq = 1;
+ }
+
+ /* Allocate dev->priv and fill in 8390 specific dev fields. */
+ if (ethdev_init(dev)) {
+ printk (", no memory for dev->priv.\n");
+ return -ENOMEM;
+ }
+
+ /* OK, we are certain this is going to work. Setup the device. */
+ request_region(ioaddr, ULTRA_IO_EXTENT, model_name);
+
+ /* The 8390 isn't at the base address, so fake the offset */
+ dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
+
+ {
+ int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
+ short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
+
+ dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
+ num_pages = num_pages_tbl[(addr >> 4) & 3];
+ }
+
+ ei_status.name = model_name;
+ ei_status.word16 = 1;
+ ei_status.tx_start_page = START_PG;
+ ei_status.rx_start_page = START_PG + TX_PAGES;
+ ei_status.stop_page = num_pages;
+
+ dev->rmem_start = dev->mem_start + TX_PAGES*256;
+ dev->mem_end = dev->rmem_end
+ = dev->mem_start + (ei_status.stop_page - START_PG)*256;
+
+ printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
+ dev->irq, dev->mem_start, dev->mem_end-1);
+
+ ei_status.reset_8390 = &ultra_reset_8390;
+ ei_status.block_input = &ultra_block_input;
+ ei_status.block_output = &ultra_block_output;
+ ei_status.get_8390_hdr = &ultra_get_8390_hdr;
+ dev->open = &ultra_open;
+ dev->stop = &ultra_close_card;
+ NS8390_init(dev, 0);
+
+ return 0;
+}
+
+static int
+ultra_open(struct device *dev)
+{
+ int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
+
+ if (request_irq(dev->irq, ei_interrupt, 0, ei_status.name))
+ return -EAGAIN;
+
+ outb(ULTRA_MEMENB, ioaddr); /* Enable memory, 16 bit mode. */
+ outb(0x80, ioaddr + 5);
+ outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
+ ei_open(dev);
+ MOD_INC_USE_COUNT;
+ return 0;
+}
+
+static void
+ultra_reset_8390(struct device *dev)
+{
+ int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
+
+ outb(ULTRA_RESET, cmd_port);
+ if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
+ ei_status.txing = 0;
+
+ outb(ULTRA_MEMENB, cmd_port);
+
+ if (ei_debug > 1) printk("reset done\n");
+ return;
+}
+
+/* Grab the 8390 specific header. Similar to the block_input routine, but
+ we don't need to be concerned with ring wrap as the header will be at
+ the start of a page, so we optimize accordingly. */
+
+static void
+ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
+{
+
+ unsigned long hdr_start = dev->mem_start + ((ring_page - START_PG)<<8);
+
+ outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
+#ifdef notdef
+ /* Officially this is what we are doing, but the readl() is faster */
+ memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
+#else
+ ((unsigned int*)hdr)[0] = readl(hdr_start);
+#endif
+ outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
+}
+
+/* Block input and output are easy on shared memory ethercards, the only
+ complication is when the ring buffer wraps. */
+
+static void
+ultra_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
+{
+ unsigned long xfer_start = dev->mem_start + ring_offset - (START_PG<<8);
+
+ /* Enable shared memory. */
+ outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
+
+ if (xfer_start + count > dev->rmem_end) {
+ /* We must wrap the input move. */
+ int semi_count = dev->rmem_end - xfer_start;
+ memcpy_fromio(skb->data, xfer_start, semi_count);
+ count -= semi_count;
+ memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);
+ } else {
+ /* Packet is in one chunk -- we can copy + cksum. */
+ eth_io_copy_and_sum(skb, xfer_start, count, 0);
+ }
+
+ outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
+}
+
+static void
+ultra_block_output(struct device *dev, int count, const unsigned char *buf,
+ int start_page)
+{
+ unsigned long shmem = dev->mem_start + ((start_page - START_PG)<<8);
+
+ /* Enable shared memory. */
+ outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
+
+ memcpy_toio(shmem, buf, count);
+
+ outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
+}
+
+static int
+ultra_close_card(struct device *dev)
+{
+ int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
+
+ dev->start = 0;
+ dev->tbusy = 1;
+
+ if (ei_debug > 1)
+ printk("%s: Shutting down ethercard.\n", dev->name);
+
+ outb(0x00, ioaddr + 6); /* Disable interrupts. */
+ free_irq(dev->irq);
+ irq2dev_map[dev->irq] = 0;
+
+ NS8390_init(dev, 0);
+
+ /* We should someday disable shared memory and change to 8-bit mode
+ "just in case"... */
+
+ MOD_DEC_USE_COUNT;
+
+ return 0;
+}
+
+
+#ifdef MODULE
+#define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
+#define NAMELEN 8 /* # of chars for storing dev->name */
+static char namelist[NAMELEN * MAX_ULTRA_CARDS] = { 0, };
+static struct device dev_ultra[MAX_ULTRA_CARDS] = {
+ {
+ NULL, /* assign a chunk of namelist[] below */
+ 0, 0, 0, 0,
+ 0, 0,
+ 0, 0, 0, NULL, NULL
+ },
+};
+
+static int io[MAX_ULTRA_CARDS] = { 0, };
+static int irq[MAX_ULTRA_CARDS] = { 0, };
+
+/* This is set up so that only a single autoprobe takes place per call.
+ISA device autoprobes on a running machine are not recommended. */
+int
+init_module(void)
+{
+ int this_dev, found = 0;
+
+ for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
+ struct device *dev = &dev_ultra[this_dev];
+ dev->name = namelist+(NAMELEN*this_dev);
+ dev->irq = irq[this_dev];
+ dev->base_addr = io[this_dev];
+ dev->init = ultra_probe;
+ if (io[this_dev] == 0) {
+ if (this_dev != 0) break; /* only autoprobe 1st one */
+ printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
+ }
+ if (register_netdev(dev) != 0) {
+ printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
+ if (found != 0) return 0; /* Got at least one. */
+ return -ENXIO;
+ }
+ found++;
+ }
+
+ return 0;
+}
+
+void
+cleanup_module(void)
+{
+ int this_dev;
+
+ for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
+ struct device *dev = &dev_ultra[this_dev];
+ if (dev->priv != NULL) {
+ /* NB: ultra_close_card() does free_irq + irq2dev */
+ int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
+ kfree(dev->priv);
+ dev->priv = NULL;
+ release_region(ioaddr, ULTRA_IO_EXTENT);
+ unregister_netdev(dev);
+ }
+ }
+}
+#endif /* MODULE */
+
+
+/*
+ * Local variables:
+ * compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
+ * version-control: t
+ * kept-new-versions: 5
+ * c-indent-level: 4
+ * tab-width: 4
+ * End:
+ */