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#ifndef _FTAPE_RW_H

#define _FTAPE_RW_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/ftape-rw.h,v $

 $Author: simons $

 *

 $Revision: 1.1.1.1 $

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

 $State: Exp $

 *

 *      This file contains the definitions for the read and write

 *      functions for the QIC-117 floppy-tape driver for Linux.

 *

 */

#include "fdc-io.h"

#include "kernel-interface.h"

#define GET2( address, offset) *(short*)(address + offset)

#define GET4( address, offset) *(long*)(address + offset)

#define PUT2( address, offset, value) *(short*)(address + offset) = value

#define PUT4( address, offset, value) *(long*)(address + offset) = value

enum runner_status_enum {

        idle = 0,

        running,

        do_abort,

        aborting,

        logical_eot,

        end_of_tape,

        buffer_overrun,

        buffer_underrun,

};

typedef struct {

        byte *address;

        volatile buffer_state_enum status;

        volatile byte *ptr;

        volatile unsigned bytes;

        volatile unsigned segment_id;

        /* bitmap for remainder of segment not yet handled.

         * one bit set for each bad sector that must be skipped.

         */

        volatile unsigned long bad_sector_map;

        /* bitmap with bad data blocks in data buffer.

         * the errors in this map may be retried.

         */

        volatile unsigned long soft_error_map;

        /* bitmap with bad data blocks in data buffer

         * the errors in this map may not be retried.

         */

        volatile unsigned long hard_error_map;

        /* retry counter for soft errors.

         */

        volatile int retry;

        /* sectors to skip on retry ???

         */

        volatile unsigned int skip;

        /* nr of data blocks in data buffer

         */

        volatile unsigned data_offset;

        /* offset in segment for first sector to be handled.

         */

        volatile unsigned sector_offset;

        /* size of cluster of good sectors to be handled.

         */

        volatile unsigned sector_count;

        /* size of remaining part of segment to be handled.

         */

        volatile unsigned remaining;

        /* points to next segment (contiguous) to be handled,

         * or is zero if no read-ahead is allowed.

         */

        volatile unsigned next_segment;

        /* flag being set if deleted data was read.

         */

        volatile int deleted;

        volatile byte head;

        volatile byte cyl;

        volatile byte sect;

} buffer_struct;

typedef struct {

        int active;

        int error;

        int offset;

} ftape_fast_start_struct;

typedef struct {

        int id;

        int size;

        int free;

} ftape_last_segment_struct;

typedef struct {

        int track;              /* tape head position */

        volatile int known;     /* validates bot, segment, sector */

        volatile int bot;       /* logical begin of track */

        volatile int eot;       /* logical end of track */

        volatile int segment;   /* current segment */

        volatile int sector;    /* sector offset within current segment */

} location_record;

typedef enum {

        fmt_normal = 2, fmt_1100ft = 3, fmt_wide = 4, fmt_425ft = 5

} format_type;

/*      ftape-rw.c defined global vars.

 */

extern int tracing;

extern byte trace_id;

extern buffer_struct buffer[];

extern location_record location;

extern volatile ftape_fast_start_struct ftape_fast_start;

extern byte deblock_buffer[(SECTORS_PER_SEGMENT - 3) * SECTOR_SIZE];

extern byte scratch_buffer[(SECTORS_PER_SEGMENT - 3) * SECTOR_SIZE];

extern ftape_last_segment_struct ftape_last_segment;

extern int header_segment_1;

extern int header_segment_2;

extern int used_header_segment;

extern unsigned int fast_seek_segment_time;

extern volatile int tape_running;

extern format_type format_code;

/*      ftape-rw.c defined global functions.

 */

extern int count_ones(unsigned long mask);

extern int valid_segment_no(unsigned segment);

extern int setup_new_segment(buffer_struct * buff, unsigned int segment_id,

                             int offset);

extern int calc_next_cluster(buffer_struct * buff);

extern buffer_struct *next_buffer(volatile int *x);

extern int ftape_read_id(void);

extern void ftape_tape_parameters(byte drive_configuration);

extern int wait_segment(buffer_state_enum state);

extern int ftape_dumb_stop(void);

extern int ftape_start_tape(int segment_id, int offset);

/*      fdc-io.c defined global functions.

 */

extern int setup_fdc_and_dma(buffer_struct * buff, byte operation);

#endif                          /* _FTAPE_RW_H */