#ifndef _FDC_IO_H
#define _FDC_IO_H
/*
* Copyright (C) 1993-1995 Bas Laarhoven.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
$Source: /home/bas/distr/ftape-2.03b/RCS/fdc-io.h,v $
$Author: bas $
*
$Revision: 1.38 $
$Date: 1995/05/10 16:09:36 $
$State: Beta $
*
* This file contains the low level functions
* that communicate with the floppy disk controller,
* for the QIC-40/80 floppy-tape driver for Linux.
*/
#include <linux/fdreg.h>
#define FDC_SK_BIT (0x20)
#define FDC_MT_BIT (0x80)
#define FDC_READ (FD_READ & ~(FDC_SK_BIT | FDC_MT_BIT))
#define FDC_WRITE (FD_WRITE & ~FDC_MT_BIT)
#define FDC_READ_DELETED (0x4c)
#define FDC_WRITE_DELETED (0x49)
#define FDC_READID (0x4a)
#define FDC_SENSED (0x04)
#define FDC_SENSEI (FD_SENSEI)
#define FDC_RECAL (FD_RECALIBRATE)
#define FDC_SEEK (FD_SEEK)
#define FDC_SPECIFY (FD_SPECIFY)
#define FDC_RECALIBR (FD_RECALIBRATE)
#define FDC_VERSION (FD_VERSION)
#define FDC_PERPEND (FD_PERPENDICULAR)
#define FDC_DUMPREGS (FD_DUMPREGS)
#define FDC_LOCK (FD_LOCK)
#define FDC_UNLOCK (FD_UNLOCK)
#define FDC_CONFIGURE (FD_CONFIGURE)
#define FDC_DRIVE_SPEC (0x8e) /* i82078 has this (any others?) */
#define FDC_PARTID (0x18) /* i82078 has this */
#define FDC_SAVE (0x2e) /* i82078 has this (any others?) */
#define FDC_RESTORE (0x4e) /* i82078 has this (any others?) */
#define FDC_STATUS_MASK (STATUS_BUSY | STATUS_DMA | STATUS_DIR | STATUS_READY)
#define FDC_DATA_READY (STATUS_READY)
#define FDC_DATA_OUTPUT (STATUS_DIR)
#define FDC_DATA_READY_MASK (STATUS_READY | STATUS_DIR)
#define FDC_DATA_OUT_READY (STATUS_READY | STATUS_DIR)
#define FDC_DATA_IN_READY (STATUS_READY)
#define FDC_BUSY (STATUS_BUSY)
#define FDC_CLK48_BIT (0x80)
#define FDC_SEL3V_BIT (0x40)
#define ST0_INT_MASK (ST0_INTR)
#define FDC_INT_NORMAL (ST0_INTR & 0x00)
#define FDC_INT_ABNORMAL (ST0_INTR & 0x40)
#define FDC_INT_INVALID (ST0_INTR & 0x80)
#define FDC_INT_READYCH (ST0_INTR & 0xC0)
#define ST0_SEEK_END (ST0_SE)
#define ST3_TRACK_0 (ST3_TZ)
#define FDC_RESET_NOT (0x04)
#define FDC_DMA_MODE (0x08)
#define FDC_MOTOR_0 (0x10)
#define FDC_MOTOR_1 (0x20)
typedef struct {
void (**hook) (void); /* our wedge into the isr */
enum {
no_fdc, i8272, i82077, i82077AA, fc10,
i82078, i82078_1
} type; /* FDC type */
unsigned char irq; /* FDC irq nr */
unsigned char dma; /* FDC dma channel nr */
unsigned short sra; /* Status register A (PS/2 only) */
unsigned short srb; /* Status register B (PS/2 only) */
unsigned short dor; /* Digital output register */
unsigned short tdr; /* Tape Drive Register (82077SL-1 &
82078 only) */
unsigned short msr; /* Main Status Register */
unsigned short dsr; /* Datarate Select Register (8207x only) */
unsigned short fifo; /* Data register / Fifo on 8207x */
unsigned short dir; /* Digital Input Register */
unsigned short ccr; /* Configuration Control Register */
unsigned short dor2; /* Alternate dor on MACH-2 controller,
also used with FC-10, meaning unknown */
} fdc_config_info;
typedef enum {
fdc_data_rate_250 = 2,
fdc_data_rate_500 = 0,
fdc_data_rate_1000 = 3,
fdc_data_rate_2000 = 1, /* i82078-1: remember to use Data Rate Table #2 */
} fdc_data_rate_type;
typedef enum {
waiting = 0,
reading,
writing,
done,
error,
} buffer_state_enum;
typedef volatile enum {
fdc_idle = 0,
fdc_reading_data = FDC_READ,
fdc_seeking = FDC_SEEK,
fdc_writing_data = FDC_WRITE,
fdc_reading_id = FDC_READID,
fdc_recalibrating = FDC_RECAL,
} fdc_mode_enum;
/*
* fdc-io.c defined public variables
*/
extern fdc_mode_enum fdc_mode;
extern volatile enum runner_status_enum runner_status;
extern int old_vfo;
extern volatile int head;
extern volatile int tail;
extern int fdc_setup_error; /* outdated ??? */
extern struct wait_queue *wait_intr;
extern volatile unsigned int next_segment; /* next segment for read ahead */
extern int ftape_unit; /* fdc unit specified at ftape_open() */
extern int ftape_motor; /* fdc motor line state */
extern int current_cylinder; /* track nr the FDC thinks we're on */
extern volatile byte fdc_head; /* FDC head */
extern volatile byte fdc_cyl; /* FDC track */
extern volatile byte fdc_sect; /* FDC sector */
extern fdc_config_info fdc; /* FDC hardware configuration */
/*
* fdc-io.c defined public functions
*/
extern void fdc_catch_stray_interrupts(unsigned count);
extern int fdc_ready_wait(int timeout);
extern int fdc_write(byte data);
extern int fdc_read(byte * data);
extern int fdc_command(byte * cmd_data, int cmd_len);
extern int fdc_result(byte * res_data, int res_len);
extern int fdc_issue_command(byte * out_data, int out_count, \
byte * in_data, int in_count);
extern void fdc_isr(void);
extern int fdc_interrupt_wait(int time);
extern void fdt_sleep(unsigned int time);
extern int fdc_specify(int head_unload_time, int seek_rate,
int head_load_time, int non_dma);
extern int fdc_set_seek_rate(int seek_rate);
extern int fdc_seek(int track);
extern int fdc_sense_drive_status(int *st3);
extern void fdc_motor(int motor);
extern void fdc_reset(void);
extern int fdc_recalibrate(void);
extern void fdc_disable(void);
extern int fdc_wait_calibrate(void);
extern int fdc_sense_interrupt_status(int *st0, int *current_cylinder);
extern void fdc_save_drive_specs(void);
extern void fdc_restore_drive_specs(void);
extern void fdc_set_data_rate(int rate);
extern int fdc_release_irq_and_dma(void);
extern int fdc_init(void);
extern int fdc_uninit(void);
extern void fdc_set_write_precomp(int precomp);
#endif
