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#ifndef _FTAPE_RW_H
#define _FTAPE_RW_H
/*
* Copyright (C) 1993-1996 Bas Laarhoven,
* (C) 1996-1997 Claus-Justus Heine.
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: /homes/cvs/ftape-stacked/ftape/lowlevel/ftape-rw.h,v $
* $Revision: 1.2 $
* $Date: 1997/10/05 19:18:25 $
*
* This file contains the definitions for the read and write
* functions for the QIC-117 floppy-tape driver for Linux.
*
* Claus-Justus Heine (1996/09/20): Add definition of format code 6
* Claus-Justus Heine (1996/10/04): Changed GET/PUT macros to cast to (__u8 *)
*
*/
#include "../lowlevel/fdc-io.h"
#include "../lowlevel/ftape-init.h"
#include "../lowlevel/ftape-bsm.h"
#include <asm/unaligned.h>
#define GET2(address, offset) get_unaligned((__u16*)((__u8 *)address + offset))
#define GET4(address, offset) get_unaligned((__u32*)((__u8 *)address + offset))
#define GET8(address, offset) get_unaligned((__u64*)((__u8 *)address + offset))
#define PUT2(address, offset , value) put_unaligned((value), (__u16*)((__u8 *)address + offset))
#define PUT4(address, offset , value) put_unaligned((value), (__u32*)((__u8 *)address + offset))
#define PUT8(address, offset , value) put_unaligned((value), (__u64*)((__u8 *)address + offset))
enum runner_status_enum {
idle = 0,
running,
do_abort,
aborting,
logical_eot,
end_of_tape,
};
typedef enum ft_buffer_queue {
ft_queue_head = 0,
ft_queue_tail = 1
} ft_buffer_queue_t;
typedef struct {
int track; /* tape head position */
volatile int segment; /* current segment */
volatile int sector; /* sector offset within current segment */
volatile unsigned int bot; /* logical begin of track */
volatile unsigned int eot; /* logical end of track */
volatile unsigned int known; /* validates bot, segment, sector */
} location_record;
/* Count nr of 1's in pattern.
*/
static inline int count_ones(unsigned long mask)
{
int bits;
for (bits = 0; mask != 0; mask >>= 1) {
if (mask & 1) {
++bits;
}
}
return bits;
}
#define FT_MAX_NR_BUFFERS 16 /* arbitrary value */
/* ftape-rw.c defined global vars.
*/
extern buffer_struct *ft_buffer[FT_MAX_NR_BUFFERS];
extern int ft_nr_buffers;
extern location_record ft_location;
extern volatile int ftape_tape_running;
/* ftape-rw.c defined global functions.
*/
extern int ftape_setup_new_segment(buffer_struct * buff,
int segment_id,
int offset);
extern int ftape_calc_next_cluster(buffer_struct * buff);
extern buffer_struct *ftape_next_buffer (ft_buffer_queue_t pos);
extern buffer_struct *ftape_get_buffer (ft_buffer_queue_t pos);
extern int ftape_buffer_id (ft_buffer_queue_t pos);
extern void ftape_reset_buffer(void);
extern void ftape_tape_parameters(__u8 drive_configuration);
extern int ftape_wait_segment(buffer_state_enum state);
extern int ftape_dumb_stop(void);
extern int ftape_start_tape(int segment_id, int offset);
extern int ftape_stop_tape(int *pstatus);
extern int ftape_handle_logical_eot(void);
extern buffer_state_enum ftape_set_state(buffer_state_enum new_state);
#endif /* _FTAPE_RW_H */
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