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#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/marcus/revision_ctrl_test/oc_cvs/cvs/or1k/uclinux/uClinux-2.0.x/drivers/char/ftape/fdc-io.h,v $

 $Author: simons $

 *

 $Revision: 1.1.1.1 $

 $Date: 2001-09-10 07:44:17 $

 $State: Exp $

 *

 *      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