include/linux/ftape.h

   1 #ifndef _FTAPE_H
   2 #define _FTAPE_H
   3
   4 /*
   5  * Copyright (C) 1994-1996 Bas Laarhoven,
   6  *           (C) 1996-1997 Claus-Justus Heine.
   7
   8  This program is free software; you can redistribute it and/or modify
   9  it under the terms of the GNU General Public License as published by
  10  the Free Software Foundation; either version 2, or (at your option)
  11  any later version.
  12
  13  This program is distributed in the hope that it will be useful,
  14  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  GNU General Public License for more details.
  17
  18  You should have received a copy of the GNU General Public License
  19  along with this program; see the file COPYING.  If not, write to
  20  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22  *
  23  * $Source: /homes/cvs/ftape-stacked/include/linux/ftape.h,v $
  24  * $Revision: 1.17.6.4 $
  25  * $Date: 1997/11/25 01:52:54 $
  26  *
  27  *      This file contains global definitions, typedefs and macro's
  28  *      for the QIC-40/80/3010/3020 floppy-tape driver for Linux.
  29  */
  30
  31 #define FTAPE_VERSION "ftape v3.04d 25/11/97"
  32
  33 /* this makes the Kernel version numbers readable */
  34 #define KERNEL_VER(major,minor,sublvl) (((major)<<16)+((minor)<<8)+(sublvl))
  35
  36 #ifdef __KERNEL__
  37 #include <linux/sched.h>
  38 #include <linux/mm.h>
  39 #endif
  40 #include <linux/types.h>
  41 #include <linux/version.h>
  42 #include <linux/config.h>
  43 #include <linux/mtio.h>
  44
  45 #define FT_SECTOR(x)            (x+1)   /* sector offset into real sector */
  46 #define FT_SECTOR_SIZE          1024
  47 #define FT_SECTORS_PER_SEGMENT    32
  48 #define FT_ECC_SECTORS             3
  49 #define FT_SEGMENT_SIZE         ((FT_SECTORS_PER_SEGMENT - FT_ECC_SECTORS) * FT_SECTOR_SIZE)
  50 #define FT_BUFF_SIZE    (FT_SECTORS_PER_SEGMENT * FT_SECTOR_SIZE)
  51
  52 /*
  53  *   bits of the minor device number that define drive selection
  54  *   methods. Could be used one day to access multiple tape
  55  *   drives on the same controller.
  56  */
  57 #define FTAPE_SEL_A     0
  58 #define FTAPE_SEL_B     1
  59 #define FTAPE_SEL_C     2
  60 #define FTAPE_SEL_D     3
  61 #define FTAPE_SEL_MASK     3
  62 #define FTAPE_SEL(unit) ((unit) & FTAPE_SEL_MASK)
  63 #define FTAPE_NO_REWIND 4       /* mask for minor nr */
  64
  65 /* the following two may be reported when MTIOCGET is requested ... */
  66 typedef union {
  67         struct {
  68                 __u8 error;
  69                 __u8 command;
  70         } error;
  71         long space;
  72 } ft_drive_error;
  73 typedef union {
  74         struct {
  75                 __u8 drive_status;
  76                 __u8 drive_config;
  77                 __u8 tape_status;
  78         } status;
  79         long space;
  80 } ft_drive_status;
  81
  82 #ifdef __KERNEL__
  83
  84 #define FT_RQM_DELAY    12
  85 #define FT_MILLISECOND  1
  86 #define FT_SECOND       1000
  87 #define FT_FOREVER      -1
  88 #ifndef HZ
  89 #error "HZ undefined."
  90 #endif
  91 #define FT_USPT         (1000000/HZ) /* microseconds per tick */
  92
  93 /* This defines the number of retries that the driver will allow
  94  * before giving up (and letting a higher level handle the error).
  95  */
  96 #ifdef TESTING
  97 #define FT_SOFT_RETRIES 1          /* number of low level retries */
  98 #define FT_RETRIES_ON_ECC_ERROR 3  /* ecc error when correcting segment */
  99 #else
 100 #define FT_SOFT_RETRIES 6          /* number of low level retries (triple) */
 101 #define FT_RETRIES_ON_ECC_ERROR 3  /* ecc error when correcting segment */
 102 #endif
 103
 104 #ifndef THE_FTAPE_MAINTAINER
 105 #define THE_FTAPE_MAINTAINER "the ftape maintainer"
 106 #endif
 107
 108 /* Initialize missing configuration parameters.
 109  */
 110 #ifndef CONFIG_FT_NR_BUFFERS
 111 # define CONFIG_FT_NR_BUFFERS 3
 112 #endif
 113 #ifndef CONFIG_FT_FDC_THR
 114 # define CONFIG_FT_FDC_THR 8
 115 #endif
 116 #ifndef CONFIG_FT_FDC_MAX_RATE
 117 # define CONFIG_FT_FDC_MAX_RATE 2000
 118 #endif
 119 #ifndef CONFIG_FT_FDC_BASE
 120 # define CONFIG_FT_FDC_BASE 0
 121 #endif
 122 #ifndef CONFIG_FT_FDC_IRQ
 123 # define CONFIG_FT_FDC_IRQ  0
 124 #endif
 125 #ifndef CONFIG_FT_FDC_DMA
 126 # define CONFIG_FT_FDC_DMA  0
 127 #endif
 128
 129 /* Turn some booleans into numbers.
 130  */
 131 #ifdef CONFIG_FT_PROBE_FC10
 132 # undef CONFIG_FT_PROBE_FC10
 133 # define CONFIG_FT_PROBE_FC10 1
 134 #else
 135 # define CONFIG_FT_PROBE_FC10 0
 136 #endif
 137 #ifdef CONFIG_FT_MACH2
 138 # undef CONFIG_FT_MACH2
 139 # define CONFIG_FT_MACH2 1
 140 #else
 141 # define CONFIG_FT_MACH2 0
 142 #endif
 143
 144 /* Insert default settings
 145  */
 146 #if CONFIG_FT_PROBE_FC10 == 1
 147 # if CONFIG_FT_FDC_BASE == 0
 148 #  undef  CONFIG_FT_FDC_BASE
 149 #  define CONFIG_FT_FDC_BASE 0x180
 150 # endif
 151 # if CONFIG_FT_FDC_IRQ == 0
 152 #  undef  CONFIG_FT_FDC_IRQ
 153 #  define CONFIG_FT_FDC_IRQ 9
 154 # endif
 155 # if CONFIG_FT_FDC_DMA == 0
 156 #  undef  CONFIG_FT_FDC_DMA
 157 #  define CONFIG_FT_FDC_DMA 3
 158 # endif
 159 #elif CONFIG_FT_MACH2 == 1    /* CONFIG_FT_PROBE_FC10 == 1 */
 160 # if CONFIG_FT_FDC_BASE == 0
 161 #  undef  CONFIG_FT_FDC_BASE
 162 #  define CONFIG_FT_FDC_BASE 0x1E0
 163 # endif
 164 # if CONFIG_FT_FDC_IRQ == 0
 165 #  undef  CONFIG_FT_FDC_IRQ
 166 #  define CONFIG_FT_FDC_IRQ 6
 167 # endif
 168 # if CONFIG_FT_FDC_DMA == 0
 169 #  undef  CONFIG_FT_FDC_DMA
 170 #  define CONFIG_FT_FDC_DMA 2
 171 # endif
 172 #elif CONFIG_FT_ALT_FDC == 1  /* CONFIG_FT_MACH2 */
 173 # if CONFIG_FT_FDC_BASE == 0
 174 #  undef  CONFIG_FT_FDC_BASE
 175 #  define CONFIG_FT_FDC_BASE 0x370
 176 # endif
 177 # if CONFIG_FT_FDC_IRQ == 0
 178 #  undef  CONFIG_FT_FDC_IRQ
 179 #  define CONFIG_FT_FDC_IRQ 6
 180 # endif
 181 # if CONFIG_FT_FDC_DMA == 0
 182 #  undef  CONFIG_FT_FDC_DMA
 183 #  define CONFIG_FT_FDC_DMA 2
 184 # endif
 185 #else                          /* CONFIG_FT_ALT_FDC */
 186 # if CONFIG_FT_FDC_BASE == 0
 187 #  undef  CONFIG_FT_FDC_BASE
 188 #  define CONFIG_FT_FDC_BASE 0x3f0
 189 # endif
 190 # if CONFIG_FT_FDC_IRQ == 0
 191 #  undef  CONFIG_FT_FDC_IRQ
 192 #  define CONFIG_FT_FDC_IRQ 6
 193 # endif
 194 # if CONFIG_FT_FDC_DMA == 0
 195 #  undef  CONFIG_FT_FDC_DMA
 196 #  define CONFIG_FT_FDC_DMA 2
 197 # endif
 198 #endif                         /* standard FDC */
 199
 200 /*      some useful macro's
 201  */
 202 #define ABS(a)          ((a) < 0 ? -(a) : (a))
 203 #define NR_ITEMS(x)     (int)(sizeof(x)/ sizeof(*x))
 204
 205 extern int ftape_init(void);
 206
 207 #endif  /* __KERNEL__ */
 208
 209 #endif