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Diffstat (limited to 'chips/fdc_82077.h')
| -rw-r--r-- | chips/fdc_82077.h | 525 |
1 files changed, 0 insertions, 525 deletions
diff --git a/chips/fdc_82077.h b/chips/fdc_82077.h deleted file mode 100644 index 95192183..00000000 --- a/chips/fdc_82077.h +++ /dev/null @@ -1,525 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1992 Carnegie Mellon University - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" - * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR - * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * Carnegie Mellon requests users of this software to return to - * - * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU - * School of Computer Science - * Carnegie Mellon University - * Pittsburgh PA 15213-3890 - * - * any improvements or extensions that they make and grant Carnegie Mellon - * the rights to redistribute these changes. - */ -/* - * File: fdi_82077_hdw.h - * Author: Alessandro Forin, Carnegie Mellon University - * Date: 1/92 - * - * Defines for the Intel 82077 Floppy Disk Controller chip. - * Includes defines for 8272A and 82072. - */ - -#ifndef _FDC_82077_H_ -#define _FDC_82077_H_ - -/* - * Chips we claim to understand, and their modes - */ -#define fdc_8272a 0 -#define fdc_82072 1 -#define fdc_82077aa 2 - -#define at_mode 0 -#define ps2_mode 1 -#define mod30_mode 2 - -#define DRIVES_PER_FDC 4 - -/* - * Register maps - */ -typedef struct { - volatile unsigned char fd_sra; /* r: status register A */ - volatile unsigned char fd_srb; /* r: status register B */ - volatile unsigned char fd_dor; /* rw: digital output reg */ - volatile unsigned char fd_tdr; /* rw: tape drive register */ - volatile unsigned char fd_msr; /* r: main status register */ -#define fd_dsr fd_msr /* w: data rate select reg */ - volatile unsigned char fd_data; /* rw: fifo */ - volatile unsigned char fd_xxx; /* --reserved-- */ - volatile unsigned char fd_dir; /* r: digital input reg */ -#define fd_ccr fd_dir /* w: config control reg */ -} fd_regmap_t; - -typedef struct { - volatile unsigned char fd_msr; /* r: main status register */ - volatile unsigned char fd_data; /* rw: data register */ -} fd_8272a_regmap_t; - -typedef fd_8272a_regmap_t fd_82072_regmap_t; -/*#define fd_dsr fd_msr /* w: data rate select reg */ - -/* - * Status register A (82077AA only) - * - * Only available in PS/2 (ps2) and Model 30 (m30) modes, - * not available in PC/AT (at) mode. - * Some signals have inverted polarity (~) on mod30 - */ - -#define FD_SRA_INT 0x80 /* interrupt */ -#define FD_SRA_DRV2 0x40 /* 2nd drive installed (ps2) */ -#define FD_SRA_DRQ 0x40 /* dma request (mod30) */ -#define FD_SRA_STEP 0x20 /* step pulse (~mod30) */ -#define FD_SRA_TRK0 0x10 /* Track 0 (~mod30) */ -#define FD_SRA_HDSEL 0x08 /* select head 1 (~mod30) */ -#define FD_SRA_INDX 0x04 /* Index hole (~mod30) */ -#define FD_SRA_WP 0x02 /* write protect (~mod30) */ -#define FD_SRA_DIR 0x01 /* step dir, 1->center (~mod30) */ - -/* - * Status register B (82077AA only) - * Not available in at mode. - */ - -#define FD_SRB_DRV2 0x80 /* 2nd drive installed (mod30) */ - /* wired 1 on ps2 */ - -#define FD_SRB_DS1 0x40 /* drive select 1 (mod30) */ - /* wired 1 on ps2 */ - -#define FD_SRB_DS0 0x20 /* drive select 0 */ -#define FD_SRB_WRDATA 0x10 /* out data (toggle or ~trigger) */ -#define FD_SRB_RDDATA 0x08 /* in data (toggle or ~trigger) */ -#define FD_SRB_WE 0x04 /* write enable (~mod30) */ -#define FD_SRB_MOT_1 0x02 /* motor enable drive 1 (ps2) */ -#define FD_SRB_DS3 0x02 /* drive select 3 (mod30) */ -#define FD_SRB_MOT_0 0x01 /* motor enable drive 0 (ps2) */ -#define FD_SRB_DS2 0x01 /* drive select 2 (mod30) */ - -/* - * Digital output register (82077AA only) - */ - -#define FD_DOR_MOT_3 0x80 /* motor enable drive 3 */ -#define FD_DOR_MOT_2 0x40 -#define FD_DOR_MOT_1 0x20 -#define FD_DOR_MOT_0 0x10 -#define FD_DOR_DMA_GATE 0x08 /* enable dma (mod30,at) */ -#define FD_DOR_ENABLE 0x04 /* chip reset (inverted) */ -#define FD_DOR_DRIVE_0 0x00 /* select drive no 0 */ -#define FD_DOR_DRIVE_1 0x01 -#define FD_DOR_DRIVE_2 0x02 -#define FD_DOR_DRIVE_3 0x03 - -/* - * Tape drive register (82077AA only) - */ - -#define FD_TDR_TAPE_1 0x01 /* unit 1 is a tape */ -#define FD_TDR_TAPE_2 0x02 -#define FD_TDR_TAPE_3 0x03 -#define FD_TDR_xxx 0xfc - -/* - * Data-rate select register (82077AA and 82072) - */ - -#define FD_DSR_RESET 0x80 /* self-clearing reset */ -#define FD_DSR_POWER_DOWN 0x40 /* stop clocks and oscill */ -#define FD_DSR_zero 0x20 /* wired zero on 82077AA */ -#define FD_DSR_EPLL 0x20 /* enable PLL on 82072 */ - -#define FD_DSR_PRECOMP_MASK 0x1c /* precompensation value */ -# define FD_DSR_PRECOMP_SHIFT 2 - -# define FD_DSR_PRECOMP_DEFAULT 0 /* 41.67@1Mbps else 125ns */ -# define FD_DSR_PRECOMP_41_67 1 -# define FD_DSR_PRECOMP_83_34 2 -# define FD_DSR_PRECOMP_125_00 3 -# define FD_DSR_PRECOMP_166_67 4 -# define FD_DSR_PRECOMP_208_33 5 -# define FD_DSR_PRECOMP_250_00 6 -# define FD_DSR_PRECOMP_DISABLE 7 /* 0.00ns */ - -#define FD_DSR_DATA_RATE_MASK 0x03 -#define FD_DSR_SD_250 0x00 /* fm modulation, 250Kbps bit clock */ -#define FD_DSR_SD_150 0x01 -#define FD_DSR_SD_125 0x02 - -#define FD_DSR_DD_500 0x00 /* mfm modulation, 500Kbps */ -#define FD_DSR_DD_300 0x01 -#define FD_DSR_DD_250 0x02 -#define FD_DSR_DD_1000 0x03 /* illegal for 82077 */ - -/* - * Main status register (all chips) - */ - -#define FD_MSR_RQM 0x80 /* request from master (allowed) */ -#define FD_MSR_DIO 0x40 /* data in/out, 1->master read */ -#define FD_MSR_NON_DMA 0x20 /* dma disabled */ -#define FD_MSR_CMD_BSY 0x10 /* command in progress */ -#define FD_MSR_DRV_3_BSY 0x08 /* drive busy seeking */ -#define FD_MSR_DRV_2_BSY 0x04 -#define FD_MSR_DRV_1_BSY 0x02 -#define FD_MSR_DRV_0_BSY 0x01 - -/* - * FIFO (82077AA and 82072) - * - * Service delay is - * Threshold * 8 - * delay = ------------- - 1.5 usecs - * Data-rate - */ - -#define FD_FIFO_DEEP 16 - -/* - * Digital input register (82077AA only) - */ - -#define FD_DIR_DSK_CHG 0x80 /* disk was changed (~mod30) */ - -#define FD_DIR_ones 0x78 /* wired ones for ps2 */ -#define FD_DIR_zeroes 0x70 /* wired zeroes for mod30 */ -#define FD_DIR_undef 0x7f /* undefined for at */ - -#define FD_DIR_DR_MASK_PS2 0x06 /* current data rate (ps2) */ -# define FD_DIR_DR_SHIFT_PS2 1 -#define FD_DIR_LOW_DENS 0x01 /* zero for 500/1M dr (ps2) */ - -#define FD_DIR_DMA_GATE 0x08 /* same as DOR (mod30) */ -#define FD_DIR_NOPREC 0x04 /* same as CCR (mod30) */ -#define FD_DIR_DR_MASK_M30 0x03 /* current data rate (mod30) */ -# define FD_DIR_DR_SHIFT_M30 0 - -/* - * Configuration control register (82077AA only) - */ - -#define FD_CCR_DATA_RATE_MASK 0x03 /* see DSR for values */ -#define FD_CCR_NOPREC 0x04 /* "has no function" (mod30) */ - - -/* - * Programming - * - * Legend for command bytes, when applicable - * - * hds bit 2 of byte 1, head select (1 -> head 1) - * ds bits 0-1 of byte 1, drive select - * c cylinder number (max 76 for 8272A, else 255) - * h head number - * r sector number - * n number of bytes in sector - * eot end-of-track, e.g. final sector number - * gpl gap length - * dtl data length (for partial sectors) - * st0-3 status byte - * srt step rate time - * hut head unload time - * hlt head load time - * nd disable DMA - * mot do not turn motor on before checking drive status - * pcn present cylinder number - * ncn new cylinder number - * rcn relative cylinder number (new=present+rcn) - * sc sectors/cylinder - * d filler byte - * ? undefined - * hsda high-speed disk adjust (doubles motor on/off delays) - * moff motor off timer, one disk revolution increments - * mon motor on timer, ditto - * eis enable implied seeks - * dfifo disable fifo - * poll disable poll - * fifthr fifo threshold (1 to 16 bytes) - * pretrk precomp starts on this trackno (0-255) - * wgate change timings of WE signal, in perpendicular mode - * gap change gap2 length, in perpendicular mode - * ec in verify, qualify terminating conditions (sc viz eot) - */ - -/* First byte of command, qualifiers */ -#define FD_CMD_MT 0x80 /* Multi-track */ -#define FD_CMD_MFM 0x40 /* Double density */ -#define FD_CMD_SK 0x20 /* skip deleted data address mark */ -#define FD_CMD_DIR 0x40 /* relative seek direction (up) */ - -/* command codes and description */ - -/* - * Read an entire track. - * Qualifiers: MFM, SK (8272A only) - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_READ_TRACK 0x02 - -/* - * Specify timers - * Qualifiers: - * Bytes total: 3 code,srt+hut,hlt+nd - * Result total: - */ -#define FD_CMD_SPECIFY 0x03 - -/* - * Sense status of drive - * Qualifiers: - * Bytes total: 2 code,hds+ds +mot(82072 only) - * Result total: 1 st3 - */ -#define FD_CMD_SENSE_DRIVE_STATUS 0x04 -# define FD_CMD_SDS_NO_MOT 0x80 - -/* - * Write - * Qualifiers: MT, MFM - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_WRITE_DATA 0x05 - -/* - * Read - * Qualifiers: MT, MFM, SK - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_READ_DATA 0x06 - -/* - * Seek to track 0 - * Qualifiers: - * Bytes total: 2 code,ds - * Result total: - */ -#define FD_CMD_RECALIBRATE 0x07 - -/* - * Sense interrupt status - * Qualifiers: - * Bytes total: 1 code - * Result total: 2 st0,pcn - */ -#define FD_CMD_SENSE_INT_STATUS 0x08 - -/* - * Write data and mark deleted - * Qualifiers: MT, MFM - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_WRITE_DELETED_DATA 0x09 - -/* - * Read current head position - * Qualifiers: MFM - * Bytes total: 2 code,hds+ds - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_READ_ID 0x0a - -/* - * Set value of MOT pin, unconditionally - * Qualifiers: see - * Bytes total: 1 code+.. - * Result total: none returns to command phase - */ -#define FD_CMD_MOTOR_ON_OFF 0x0b /* 82072 only */ - -# define FD_CMD_MOT_ON 0x80 -# define FD_CMD_MOT_DS 0x60 -# define FD_CMD_MOT_DS_SHIFT 5 - -/* - * Read data despite deleted address mark - * Qualifiers: MT, MFM, SK - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_READ_DELETED_DATA 0x0c - -/* - * Media initialization - * Qualifiers: MFM - * Bytes total: 6 code,hds+ds,n,sc,gpl,d - * Data: 4*sc/2 c,h,r,n - * Result total: 7 st0,st1,st2,?,?,?,? - */ -#define FD_CMD_FORMAT_TRACK 0x0d - -/* - * Dump internal register status - * Qualifiers: - * Bytes total: 1 code - * Result total: 10 pcn0,pcn1,pcn2,pcn3,srt+hut,hlt+nd, - * sc/eot,hsda+moff+mon, - * eis+dfifo+poll+fifothr, pretrk - * Notes: 82077AA does not provide for hsda+moff+mon - */ -#define FD_CMD_DUMPREG 0x0e /* not 8272a */ - -/* - * Move head - * Qualifiers: - * Bytes total: 3 code,hds+ds,ncn - * Result total: - */ -#define FD_CMD_SEEK 0x0f - -/* - * - * Qualifiers: - * Bytes total: 1 code - * Result total: 1 version - */ -#define FD_CMD_VERSION 0x10 /* 82077AA only */ -# define FD_VERSION_82077AA 0x90 - -/* - * Scan disk data - * Qualifiers: MT, MFM, SK - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_SCAN_EQUAL 0x11 /* 8272A only */ - -/* - * Specify timers - * Qualifiers: - * Bytes total: 2 code,wgate+gap - * Result total: - */ -#define FD_CMD_PERPENDICULAR_MODE 0x12 /* 82077AA only */ - -/* - * Set configuration parameters - * Qualifiers: - * Bytes total: 4 code,hsda+moff+mon,eis+dfifo+poll+fifothr, - * pretrk - * Result total: - * Notes: 82077AA does not provide for hsda+moff+mon - */ -#define FD_CMD_CONFIGURE 0x13 /* not 8272a */ - -/* - * Verify CRC of disk data - * Qualifiers: MT, MFM, SK - * Bytes total: 9 code,ec+hds+ds,c,h,r,n,eot,gpl,dtl/sc - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_VERIFY 0x16 /* 82077AA only */ - -/* - * Scan disk data (disk less-or-equal memory) - * Qualifiers: MT, MFM, SK - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_SCAN_LOW_OR_EQUAL 0x19 /* 8272A only */ - -/* - * Scan disk data (disk greater-or-equal memory) - * Qualifiers: MT, MFM, SK - * Bytes total: 9 code,hds+ds,c,h,r,n,eot,gpl,dtl - * Result total: 7 st0,st1,st2,c,h,r,n - */ -#define FD_CMD_SCAN_HIGH_OR_EQUAL 0x1d /* 8272A only */ - -/* - * Specify timers - * Qualifiers: DIR - * Bytes total: 3 code,hds+ds,rcn - * Result total: - */ -#define FD_CMD_RELATIVE_SEEK 0x8f /* not 8272a */ - -/* - * Any invalid command code - * Qualifiers: - * Bytes total: 1 code - * Result total: 1 st0 (st0 == 0x80) - */ -#define FD_CMD_INVALID 0xff - - -/* - * Results and statii - * - * The typical command returns three status bytes, - * followed by four drive status bytes. - */ - -/* - * Status register 0 - */ -#define FD_ST0_IC_MASK 0xc0 /* interrupt completion code */ - -# define FD_ST0_IC_OK 0x00 /* terminated ok */ -# define FD_ST0_IC_AT 0x40 /* exec phase ended sour */ -# define FD_ST0_IC_BAD_CMD 0x80 /* didnt grok */ -# define FD_ST0_IC_AT_POLL 0xc0 /* polling got in the way */ - -#define FD_ST0_SE 0x20 /* (implied) seek ended */ -#define FD_ST0_EC 0x10 /* equipment check */ -#define FD_ST0_NR 0x08 /* not ready (raz for 82077aa) */ -#define FD_ST0_H 0x04 /* currently selected head */ -#define FD_ST0_DS 0x03 /* currently selected drive */ - -/* - * Status register 1 - */ - -#define FD_ST1_EN 0x80 /* end of cylinder (TC not set?) */ -#define FD_ST1_zero 0x48 -#define FD_ST1_DE 0x20 /* data error, bad CRC */ -#define FD_ST1_OR 0x10 /* overrun/underrun -#define FD_ST1_ND 0x04 /* no data, sector not found */ -#define FD_ST1_NW 0x02 /* write protect signal */ -#define FD_ST1_MA 0x01 /* missing address mark */ - -/* - * Status register 2 - */ - -#define FD_ST2_zero 0x80 -#define FD_ST2_CM 0x40 /* control mark, improper read */ -#define FD_ST2_DD 0x20 /* the CRC error was for data */ -#define FD_ST2_WC 0x10 /* wrong cylinder */ -#define FD_ST2_SH 0x08 /* scan hit (8272a only) */ -#define FD_ST2_SN 0x04 /* scan not met (8272a only) */ -#define FD_ST2_BC 0x02 /* bad cylinder, has 0xff mark */ -#define FD_ST2_MD 0x01 /* missing data mark */ - -/* - * Status register 3 - * (sense drive status) - */ - -#define FD_ST3_FT 0x80 /* fault pin (0 if not 8272a) */ -#define FD_ST3_WP 0x40 /* write protect pin */ -#define FD_ST3_RDY 0x20 /* ready pin (1 on 82077aa) */ -#define FD_ST3_T0 0x10 /* track0 pin */ -#define FD_ST3_TS 0x08 /* two-sided pin (1 if not 8272a) */ -#define FD_ST3_HD 0x04 /* hdsel pin */ -#define FD_ST3_DS 0x03 /* drive select pins (1&0) */ - - -#endif /* _FDC_82077_H_ */ |