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Diffstat (limited to 'drivers/char/ftape/lowlevel/ftape-rw.h')
| -rw-r--r-- | drivers/char/ftape/lowlevel/ftape-rw.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/char/ftape/lowlevel/ftape-rw.h b/drivers/char/ftape/lowlevel/ftape-rw.h new file mode 100644 index 000000000000..32f4feeb887c --- /dev/null +++ b/drivers/char/ftape/lowlevel/ftape-rw.h @@ -0,0 +1,111 @@ +#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 */ |