root/include/linux/ftape.h

/* */

INCLUDED FROM

   1 #ifndef _FTAPE_H
   2 #define _FTAPE_H
   3 
   4 /*
   5  * Copyright (C) 1994-1995 Bas Laarhoven.
   6 
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11 
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16 
  17 You should have received a copy of the GNU General Public License
  18 along with this program; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20 
  21  *
  22  $Source: /home/bas/distr/ftape-2.03b/RCS/ftape.h,v $
  23  $Author: bas $
  24  *
  25  $Revision: 1.18 $
  26  $Date: 1995/05/06 16:11:53 $
  27  $State: Beta $
  28  *
  29  *      This file contains global definitions, typedefs and macro's
  30  *      for the QIC-40/80 floppy-tape driver for Linux.
  31  */
  32 
  33 #include <linux/sched.h>
  34 #include <linux/mm.h>
  35 
  36 #define SECTOR(x)       (x+1)         /* sector offset into real sector */
  37 #define SECTOR_SIZE     (1024)
  38 #define SECTORS_PER_SEGMENT (32)
  39 #define BUFF_SIZE       (SECTORS_PER_SEGMENT * SECTOR_SIZE)
  40 #define FTAPE_UNIT      (ftape_unit & 3)
  41 #define RQM_DELAY       (12)
  42 #define MILLISECOND     (1)
  43 #define SECOND          (1000)
  44 #define FOREVER         (-1)
  45 #ifndef HZ
  46 # error "HZ undefined."
  47 #endif
  48 #define MSPT            (SECOND / HZ) /* milliseconds per tick */
  49 
  50 /* This defines the number of retries that the driver will allow
  51  * before giving up (and letting a higher level handle the error).
  52  */
  53 #ifdef TESTING
  54 # define SOFT_RETRIES 1          /* number of low level retries */
  55 # define RETRIES_ON_ECC_ERROR 3  /* ecc error when correcting segment */
  56 #else
  57 # define SOFT_RETRIES 6          /* number of low level retries (triple) */
  58 # define RETRIES_ON_ECC_ERROR 3  /* ecc error when correcting segment */
  59 #endif
  60 /*      some useful macro's
  61  */
  62 #define ABS(a)          ((a) < 0 ? -(a) : (a))
  63 #define NR_ITEMS(x)     (sizeof(x)/ sizeof(*x))
  64 
  65 typedef unsigned char byte;
  66 
  67 extern int ftape_init(void);
  68 
  69 #endif
  70 

/* */