drivers/char/ftape/fdc-io.h

/* */
   1 #ifndef _FDC_IO_H
   2 #define _FDC_IO_H
   3 
   4 /*
   5  * Copyright (C) 1993-1995 Bas Laarhoven.
   6 
   7  This program is free software; you can redistribute it and/or modify
   8  it under the terms of the GNU General Public License as published by
   9  the Free Software Foundation; either version 2, or (at your option)
  10  any later version.
  11 
  12  This program is distributed in the hope that it will be useful,
  13  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  GNU General Public License for more details.
  16 
  17  You should have received a copy of the GNU General Public License
  18  along with this program; see the file COPYING.  If not, write to
  19  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20 
  21  *
  22  $Source: /home/bas/distr/ftape-2.03b/RCS/fdc-io.h,v $
  23  $Author: bas $
  24  *
  25  $Revision: 1.38 $
  26  $Date: 1995/05/10 16:09:36 $
  27  $State: Beta $
  28  *
  29  *      This file contains the low level functions
  30  *      that communicate with the floppy disk controller,
  31  *      for the QIC-40/80 floppy-tape driver for Linux.
  32  */
  33 
  34 #include <linux/fdreg.h>
  35 
  36 #define FDC_SK_BIT      (0x20)
  37 #define FDC_MT_BIT      (0x80)
  38 
  39 #define FDC_READ        (FD_READ & ~(FDC_SK_BIT | FDC_MT_BIT))
  40 #define FDC_WRITE       (FD_WRITE & ~FDC_MT_BIT)
  41 #define FDC_READ_DELETED (0x4c)
  42 #define FDC_WRITE_DELETED (0x49)
  43 #define FDC_READID      (0x4a)
  44 #define FDC_SENSED      (0x04)
  45 #define FDC_SENSEI      (FD_SENSEI)
  46 #define FDC_RECAL       (FD_RECALIBRATE)
  47 #define FDC_SEEK        (FD_SEEK)
  48 #define FDC_SPECIFY     (FD_SPECIFY)
  49 #define FDC_RECALIBR    (FD_RECALIBRATE)
  50 #define FDC_VERSION     (FD_VERSION)
  51 #define FDC_PERPEND     (FD_PERPENDICULAR)
  52 #define FDC_DUMPREGS    (FD_DUMPREGS)
  53 #define FDC_LOCK        (FD_LOCK)
  54 #define FDC_UNLOCK      (FD_UNLOCK)
  55 #define FDC_CONFIGURE   (FD_CONFIGURE)
  56 #define FDC_DRIVE_SPEC  (0x8e)  /* i82078 has this (any others?) */
  57 #define FDC_PARTID      (0x18)  /* i82078 has this */
  58 #define FDC_SAVE        (0x2e)  /* i82078 has this (any others?) */
  59 #define FDC_RESTORE     (0x4e)  /* i82078 has this (any others?) */
  60 
  61 #define FDC_STATUS_MASK (STATUS_BUSY | STATUS_DMA | STATUS_DIR | STATUS_READY)
  62 #define FDC_DATA_READY  (STATUS_READY)
  63 #define FDC_DATA_OUTPUT (STATUS_DIR)
  64 #define FDC_DATA_READY_MASK (STATUS_READY | STATUS_DIR)
  65 #define FDC_DATA_OUT_READY  (STATUS_READY | STATUS_DIR)
  66 #define FDC_DATA_IN_READY   (STATUS_READY)
  67 #define FDC_BUSY        (STATUS_BUSY)
  68 #define FDC_CLK48_BIT   (0x80)
  69 #define FDC_SEL3V_BIT   (0x40)
  70 
  71 #define ST0_INT_MASK    (ST0_INTR)
  72 #define FDC_INT_NORMAL  (ST0_INTR & 0x00)
  73 #define FDC_INT_ABNORMAL (ST0_INTR & 0x40)
  74 #define FDC_INT_INVALID (ST0_INTR & 0x80)
  75 #define FDC_INT_READYCH (ST0_INTR & 0xC0)
  76 #define ST0_SEEK_END    (ST0_SE)
  77 #define ST3_TRACK_0     (ST3_TZ)
  78 
  79 #define FDC_RESET_NOT   (0x04)
  80 #define FDC_DMA_MODE    (0x08)
  81 #define FDC_MOTOR_0     (0x10)
  82 #define FDC_MOTOR_1     (0x20)
  83 
  84 typedef struct {
  85         void (**hook) (void);   /* our wedge into the isr */
  86         enum {
  87                 no_fdc, i8272, i82077, i82077AA, fc10,
  88                 i82078, i82078_1
  89         } type;                 /* FDC type */
  90         unsigned char irq;      /* FDC irq nr */
  91         unsigned char dma;      /* FDC dma channel nr */
  92         unsigned short sra;     /* Status register A (PS/2 only) */
  93         unsigned short srb;     /* Status register B (PS/2 only) */
  94         unsigned short dor;     /* Digital output register */
  95         unsigned short tdr;     /* Tape Drive Register (82077SL-1 &
  96                                    82078 only) */
  97         unsigned short msr;     /* Main Status Register */
  98         unsigned short dsr;     /* Datarate Select Register (8207x only) */
  99         unsigned short fifo;    /* Data register / Fifo on 8207x */
 100         unsigned short dir;     /* Digital Input Register */
 101         unsigned short ccr;     /* Configuration Control Register */
 102         unsigned short dor2;    /* Alternate dor on MACH-2 controller,
 103                                    also used with FC-10, meaning unknown */
 104 } fdc_config_info;
 105 
 106 typedef enum {
 107         fdc_data_rate_250 = 2,
 108         fdc_data_rate_500 = 0,
 109         fdc_data_rate_1000 = 3,
 110         fdc_data_rate_2000 = 1, /* i82078-1: remember to use Data Rate Table #2 */
 111 } fdc_data_rate_type;
 112 
 113 typedef enum {
 114         waiting = 0,
 115         reading,
 116         writing,
 117         done,
 118         error,
 119 } buffer_state_enum;
 120 
 121 typedef volatile enum {
 122         fdc_idle = 0,
 123         fdc_reading_data = FDC_READ,
 124         fdc_seeking = FDC_SEEK,
 125         fdc_writing_data = FDC_WRITE,
 126         fdc_reading_id = FDC_READID,
 127         fdc_recalibrating = FDC_RECAL,
 128 } fdc_mode_enum;
 129 
 130 /*
 131  *      fdc-io.c defined public variables
 132  */
 133 extern fdc_mode_enum fdc_mode;
 134 extern volatile enum runner_status_enum runner_status;
 135 extern int old_vfo;
 136 extern volatile int head;
 137 extern volatile int tail;
 138 extern int fdc_setup_error;     /* outdated ??? */
 139 extern struct wait_queue *wait_intr;
 140 extern volatile unsigned int next_segment;      /* next segment for read ahead */
 141 extern int ftape_unit;          /* fdc unit specified at ftape_open() */
 142 extern int ftape_motor;         /* fdc motor line state */
 143 extern int current_cylinder;    /* track nr the FDC thinks we're on */
 144 extern volatile byte fdc_head;  /* FDC head */
 145 extern volatile byte fdc_cyl;   /* FDC track */
 146 extern volatile byte fdc_sect;  /* FDC sector */
 147 extern fdc_config_info fdc;     /* FDC hardware configuration */
 148 
 149 /*
 150  *      fdc-io.c defined public functions
 151  */
 152 extern void fdc_catch_stray_interrupts(unsigned count);
 153 extern int fdc_ready_wait(int timeout);
 154 extern int fdc_write(byte data);
 155 extern int fdc_read(byte * data);
 156 extern int fdc_command(byte * cmd_data, int cmd_len);
 157 extern int fdc_result(byte * res_data, int res_len);
 158 extern int fdc_issue_command(byte * out_data, int out_count, \
 159                              byte * in_data, int in_count);
 160 extern void fdc_isr(void);
 161 extern int fdc_interrupt_wait(int time);
 162 extern void fdt_sleep(unsigned int time);
 163 extern int fdc_specify(int head_unload_time, int seek_rate,
 164                        int head_load_time, int non_dma);
 165 extern int fdc_set_seek_rate(int seek_rate);
 166 extern int fdc_seek(int track);
 167 extern int fdc_sense_drive_status(int *st3);
 168 extern void fdc_motor(int motor);
 169 extern void fdc_reset(void);
 170 extern int fdc_recalibrate(void);
 171 extern void fdc_disable(void);
 172 extern int fdc_wait_calibrate(void);
 173 extern int fdc_sense_interrupt_status(int *st0, int *current_cylinder);
 174 extern void fdc_save_drive_specs(void);
 175 extern void fdc_restore_drive_specs(void);
 176 extern void fdc_set_data_rate(int rate);
 177 extern int fdc_release_irq_and_dma(void);
 178 extern int fdc_init(void);
 179 extern int fdc_uninit(void);
 180 extern void fdc_set_write_precomp(int precomp);
 181 
 182 #endif
/* */
root/drivers/char/ftape/fdc-io.h

INCLUDED FROM
