1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
#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 */
|