drivers/char/ftape/lowlevel/fdc-io.h

   1 #ifndef _FDC_IO_H
   2 #define _FDC_IO_H
   3
   4 /*
   5  *    Copyright (C) 1993-1996 Bas Laarhoven,
   6  *              (C) 1996-1997 Claus-Justus Heine.
   7
   8  This program is free software; you can redistribute it and/or modify
   9  it under the terms of the GNU General Public License as published by
  10  the Free Software Foundation; either version 2, or (at your option)
  11  any later version.
  12
  13  This program is distributed in the hope that it will be useful,
  14  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  GNU General Public License for more details.
  17
  18  You should have received a copy of the GNU General Public License
  19  along with this program; see the file COPYING.  If not, write to
  20  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22  *
  23  * $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/fdc-io.h,v $
  24  * $Revision: 1.3 $
  25  * $Date: 1997/10/05 19:18:06 $
  26  *
  27  *      This file contains the declarations for the low level
  28  *      functions that communicate with the floppy disk controller,
  29  *      for the QIC-40/80/3010/3020 floppy-tape driver "ftape" for
  30  *      Linux.
  31  */
  32
  33 #include <linux/fdreg.h>
  34
  35 #include "../lowlevel/ftape-bsm.h"
  36
  37 #define FDC_SK_BIT      (0x20)
  38 #define FDC_MT_BIT      (0x80)
  39
  40 #define FDC_READ        (FD_READ & ~(FDC_SK_BIT | FDC_MT_BIT))
  41 #define FDC_WRITE       (FD_WRITE & ~FDC_MT_BIT)
  42 #define FDC_READ_DELETED  (0x4c)
  43 #define FDC_WRITE_DELETED (0x49)
  44 #define FDC_VERIFY        (0x56)
  45 #define FDC_READID      (0x4a)
  46 #define FDC_SENSED      (0x04)
  47 #define FDC_SENSEI      (FD_SENSEI)
  48 #define FDC_FORMAT      (FD_FORMAT)
  49 #define FDC_RECAL       (FD_RECALIBRATE)
  50 #define FDC_SEEK        (FD_SEEK)
  51 #define FDC_SPECIFY     (FD_SPECIFY)
  52 #define FDC_RECALIBR    (FD_RECALIBRATE)
  53 #define FDC_VERSION     (FD_VERSION)
  54 #define FDC_PERPEND     (FD_PERPENDICULAR)
  55 #define FDC_DUMPREGS    (FD_DUMPREGS)
  56 #define FDC_LOCK        (FD_LOCK)
  57 #define FDC_UNLOCK      (FD_UNLOCK)
  58 #define FDC_CONFIGURE   (FD_CONFIGURE)
  59 #define FDC_DRIVE_SPEC  (0x8e)  /* i82078 has this (any others?) */
  60 #define FDC_PARTID      (0x18)  /* i82078 has this */
  61 #define FDC_SAVE        (0x2e)  /* i82078 has this (any others?) */
  62 #define FDC_RESTORE     (0x4e)  /* i82078 has this (any others?) */
  63
  64 #define FDC_STATUS_MASK (STATUS_BUSY | STATUS_DMA | STATUS_DIR | STATUS_READY)
  65 #define FDC_DATA_READY  (STATUS_READY)
  66 #define FDC_DATA_OUTPUT (STATUS_DIR)
  67 #define FDC_DATA_READY_MASK (STATUS_READY | STATUS_DIR)
  68 #define FDC_DATA_OUT_READY  (STATUS_READY | STATUS_DIR)
  69 #define FDC_DATA_IN_READY   (STATUS_READY)
  70 #define FDC_BUSY        (STATUS_BUSY)
  71 #define FDC_CLK48_BIT   (0x80)
  72 #define FDC_SEL3V_BIT   (0x40)
  73
  74 #define ST0_INT_MASK    (ST0_INTR)
  75 #define FDC_INT_NORMAL  (ST0_INTR & 0x00)
  76 #define FDC_INT_ABNORMAL (ST0_INTR & 0x40)
  77 #define FDC_INT_INVALID (ST0_INTR & 0x80)
  78 #define FDC_INT_READYCH (ST0_INTR & 0xC0)
  79 #define ST0_SEEK_END    (ST0_SE)
  80 #define ST3_TRACK_0     (ST3_TZ)
  81
  82 #define FDC_RESET_NOT   (0x04)
  83 #define FDC_DMA_MODE    (0x08)
  84 #define FDC_MOTOR_0     (0x10)
  85 #define FDC_MOTOR_1     (0x20)
  86
  87 typedef struct {
  88         void (**hook) (void);   /* our wedge into the isr */
  89         enum {
  90                 no_fdc, i8272, i82077, i82077AA, fc10,
  91                 i82078, i82078_1
  92         } type;                 /* FDC type */
  93         unsigned int irq; /* FDC irq nr */
  94         unsigned int dma; /* FDC dma channel nr */
  95         __u16 sra;        /* Status register A (PS/2 only) */
  96         __u16 srb;        /* Status register B (PS/2 only) */
  97         __u16 dor;        /* Digital output register */
  98         __u16 tdr;        /* Tape Drive Register (82077SL-1 &
  99                              82078 only) */
 100         __u16 msr;        /* Main Status Register */
 101         __u16 dsr;        /* Datarate Select Register (8207x only) */
 102         __u16 fifo;       /* Data register / Fifo on 8207x */
 103         __u16 dir;        /* Digital Input Register */
 104         __u16 ccr;        /* Configuration Control Register */
 105         __u16 dor2;       /* Alternate dor on MACH-2 controller,
 106                              also used with FC-10, meaning unknown */
 107 } fdc_config_info;
 108
 109 typedef enum {
 110         fdc_data_rate_250  = 2,
 111         fdc_data_rate_300  = 1, /* any fdc in default configuration */
 112         fdc_data_rate_500  = 0,
 113         fdc_data_rate_1000 = 3,
 114         fdc_data_rate_2000 = 1, /* i82078-1: when using Data Rate Table #2 */
 115 } fdc_data_rate_type;
 116
 117 typedef enum {
 118         fdc_idle          = 0,
 119         fdc_reading_data  = FDC_READ,
 120         fdc_seeking       = FDC_SEEK,
 121         fdc_writing_data  = FDC_WRITE,
 122         fdc_deleting      = FDC_WRITE_DELETED,
 123         fdc_reading_id    = FDC_READID,
 124         fdc_recalibrating = FDC_RECAL,
 125         fdc_formatting    = FDC_FORMAT,
 126         fdc_verifying     = FDC_VERIFY
 127 } fdc_mode_enum;
 128
 129 typedef enum {
 130         waiting = 0,
 131         reading,
 132         writing,
 133         formatting,
 134         verifying,
 135         deleting,
 136         done,
 137         error,
 138         mmapped,
 139 } buffer_state_enum;
 140
 141 typedef struct {
 142         __u8 *address;
 143         volatile buffer_state_enum status;
 144         volatile __u8 *ptr;
 145         volatile unsigned int bytes;
 146         volatile unsigned int segment_id;
 147
 148         /* bitmap for remainder of segment not yet handled.
 149          * one bit set for each bad sector that must be skipped.
 150          */
 151         volatile SectorMap bad_sector_map;
 152
 153         /* bitmap with bad data blocks in data buffer.
 154          * the errors in this map may be retried.
 155          */
 156         volatile SectorMap soft_error_map;
 157
 158         /* bitmap with bad data blocks in data buffer
 159          * the errors in this map may not be retried.
 160          */
 161         volatile SectorMap hard_error_map;
 162
 163         /* retry counter for soft errors.
 164          */
 165         volatile int retry;
 166
 167         /* sectors to skip on retry ???
 168          */
 169         volatile unsigned int skip;
 170
 171         /* nr of data blocks in data buffer
 172          */
 173         volatile unsigned int data_offset;
 174
 175         /* offset in segment for first sector to be handled.
 176          */
 177         volatile unsigned int sector_offset;
 178
 179         /* size of cluster of good sectors to be handled.
 180          */
 181         volatile unsigned int sector_count;
 182
 183         /* size of remaining part of segment to be handled.
 184          */
 185         volatile unsigned int remaining;
 186
 187         /* points to next segment (contiguous) to be handled,
 188          * or is zero if no read-ahead is allowed.
 189          */
 190         volatile unsigned int next_segment;
 191
 192         /* flag being set if deleted data was read.
 193          */
 194         volatile int deleted;
 195
 196         /* floppy coordinates of first sector in segment */
 197         volatile __u8 head;
 198         volatile __u8 cyl;
 199         volatile __u8 sect;
 200
 201         /* gap to use when formatting */
 202         __u8 gap3;
 203         /* flag set when buffer is mmaped */
 204         int mmapped;
 205 } buffer_struct;
 206
 207 /*
 208  *      fdc-io.c defined public variables
 209  */
 210 extern volatile fdc_mode_enum fdc_mode;
 211 extern int fdc_setup_error;     /* outdated ??? */
 212 extern wait_queue_head_t ftape_wait_intr;
 213 extern volatile int ftape_current_cylinder; /* track nr FDC thinks we're on */
 214 extern volatile __u8 fdc_head;  /* FDC head */
 215 extern volatile __u8 fdc_cyl;   /* FDC track */
 216 extern volatile __u8 fdc_sect;  /* FDC sector */
 217 extern fdc_config_info fdc;     /* FDC hardware configuration */
 218
 219 extern unsigned int ft_fdc_base;
 220 extern unsigned int ft_fdc_irq;
 221 extern unsigned int ft_fdc_dma;
 222 extern unsigned int ft_fdc_threshold;
 223 extern unsigned int ft_fdc_rate_limit;
 224 extern int ft_probe_fc10;
 225 extern int ft_mach2;
 226 /*
 227  *      fdc-io.c defined public functions
 228  */
 229 extern void fdc_catch_stray_interrupts(int count);
 230 extern int fdc_ready_wait(unsigned int timeout);
 231 extern int fdc_command(const __u8 * cmd_data, int cmd_len);
 232 extern int fdc_result(__u8 * res_data, int res_len);
 233 extern int fdc_interrupt_wait(unsigned int time);
 234 extern int fdc_seek(int track);
 235 extern int fdc_sense_drive_status(int *st3);
 236 extern void fdc_motor(int motor);
 237 extern void fdc_reset(void);
 238 extern void fdc_disable(void);
 239 extern int fdc_fifo_threshold(__u8 threshold,
 240                               int *fifo_state, int *lock_state, int *fifo_thr);
 241 extern void fdc_wait_calibrate(void);
 242 extern int fdc_sense_interrupt_status(int *st0, int *current_cylinder);
 243 extern void fdc_save_drive_specs(void);
 244 extern void fdc_restore_drive_specs(void);
 245 extern int fdc_set_data_rate(int rate);
 246 extern void fdc_set_write_precomp(int precomp);
 247 extern int fdc_release_irq_and_dma(void);
 248 extern void fdc_release_regions(void);
 249 extern int fdc_init(void);
 250 extern int fdc_setup_read_write(buffer_struct * buff, __u8 operation);
 251 extern int fdc_setup_formatting(buffer_struct * buff);
 252 #endif