i386/linux-2.3.21/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 #if LINUX_VERSION_CODE <= KERNEL_VER(1,2,13)
  44 typedef daddr_t __kernel_daddr_t; /* needed for mtio.h */
  45 #endif
  46 #include <linux/mtio.h>
  47
  48 #define FT_SECTOR(x)            (x+1)   /* sector offset into real sector */
  49 #define FT_SECTOR_SIZE          1024
  50 #define FT_SECTORS_PER_SEGMENT    32
  51 #define FT_ECC_SECTORS             3
  52 #define FT_SEGMENT_SIZE         ((FT_SECTORS_PER_SEGMENT - FT_ECC_SECTORS) * FT_SECTOR_SIZE)
  53 #define FT_BUFF_SIZE    (FT_SECTORS_PER_SEGMENT * FT_SECTOR_SIZE)
  54
  55 /*
  56  *   bits of the minor device number that define drive selection
  57  *   methods. Could be used one day to access multiple tape
  58  *   drives on the same controller.
  59  */
  60 #define FTAPE_SEL_A     0
  61 #define FTAPE_SEL_B     1
  62 #define FTAPE_SEL_C     2
  63 #define FTAPE_SEL_D     3
  64 #define FTAPE_SEL_MASK     3
  65 #define FTAPE_SEL(unit) ((unit) & FTAPE_SEL_MASK)
  66 #define FTAPE_NO_REWIND 4       /* mask for minor nr */
  67
  68 /* the following two may be reported when MTIOCGET is requested ... */
  69 typedef union {
  70         struct {
  71                 __u8 error;
  72                 __u8 command;
  73         } error;
  74         long space;
  75 } ft_drive_error;
  76 typedef union {
  77         struct {
  78                 __u8 drive_status;
  79                 __u8 drive_config;
  80                 __u8 tape_status;
  81         } status;
  82         long space;
  83 } ft_drive_status;
  84
  85 #ifdef __KERNEL__
  86
  87 #define FT_RQM_DELAY    12
  88 #define FT_MILLISECOND  1
  89 #define FT_SECOND       1000
  90 #define FT_FOREVER      -1
  91 #ifndef HZ
  92 #error "HZ undefined."
  93 #endif
  94 #define FT_USPT         (1000000/HZ) /* microseconds per tick */
  95
  96 /* This defines the number of retries that the driver will allow
  97  * before giving up (and letting a higher level handle the error).
  98  */
  99 #ifdef TESTING
 100 #define FT_SOFT_RETRIES 1          /* number of low level retries */
 101 #define FT_RETRIES_ON_ECC_ERROR 3  /* ecc error when correcting segment */
 102 #else
 103 #define FT_SOFT_RETRIES 6          /* number of low level retries (triple) */
 104 #define FT_RETRIES_ON_ECC_ERROR 3  /* ecc error when correcting segment */
 105 #endif
 106
 107 #ifndef THE_FTAPE_MAINTAINER
 108 #define THE_FTAPE_MAINTAINER "the ftape maintainer"
 109 #endif
 110
 111 /* Initialize missing configuration parameters.
 112  */
 113 #ifndef CONFIG_FT_NR_BUFFERS
 114 # define CONFIG_FT_NR_BUFFERS 3
 115 #endif
 116 #ifndef CONFIG_FT_FDC_THR
 117 # define CONFIG_FT_FDC_THR 8
 118 #endif
 119 #ifndef CONFIG_FT_FDC_MAX_RATE
 120 # define CONFIG_FT_FDC_MAX_RATE 2000
 121 #endif
 122 #ifndef CONFIG_FT_FDC_BASE
 123 # define CONFIG_FT_FDC_BASE 0
 124 #endif
 125 #ifndef CONFIG_FT_FDC_IRQ
 126 # define CONFIG_FT_FDC_IRQ  0
 127 #endif
 128 #ifndef CONFIG_FT_FDC_DMA
 129 # define CONFIG_FT_FDC_DMA  0
 130 #endif
 131
 132 /* Turn some booleans into numbers.
 133  */
 134 #ifdef CONFIG_FT_PROBE_FC10
 135 # undef CONFIG_FT_PROBE_FC10
 136 # define CONFIG_FT_PROBE_FC10 1
 137 #else
 138 # define CONFIG_FT_PROBE_FC10 0
 139 #endif
 140 #ifdef CONFIG_FT_MACH2
 141 # undef CONFIG_FT_MACH2
 142 # define CONFIG_FT_MACH2 1
 143 #else
 144 # define CONFIG_FT_MACH2 0
 145 #endif
 146
 147 /* Insert default settings
 148  */
 149 #if CONFIG_FT_PROBE_FC10 == 1
 150 # if CONFIG_FT_FDC_BASE == 0
 151 #  undef  CONFIG_FT_FDC_BASE
 152 #  define CONFIG_FT_FDC_BASE 0x180
 153 # endif
 154 # if CONFIG_FT_FDC_IRQ == 0
 155 #  undef  CONFIG_FT_FDC_IRQ
 156 #  define CONFIG_FT_FDC_IRQ 9
 157 # endif
 158 # if CONFIG_FT_FDC_DMA == 0
 159 #  undef  CONFIG_FT_FDC_DMA
 160 #  define CONFIG_FT_FDC_DMA 3
 161 # endif
 162 #elif CONFIG_FT_MACH2 == 1    /* CONFIG_FT_PROBE_FC10 == 1 */
 163 # if CONFIG_FT_FDC_BASE == 0
 164 #  undef  CONFIG_FT_FDC_BASE
 165 #  define CONFIG_FT_FDC_BASE 0x1E0
 166 # endif
 167 # if CONFIG_FT_FDC_IRQ == 0
 168 #  undef  CONFIG_FT_FDC_IRQ
 169 #  define CONFIG_FT_FDC_IRQ 6
 170 # endif
 171 # if CONFIG_FT_FDC_DMA == 0
 172 #  undef  CONFIG_FT_FDC_DMA
 173 #  define CONFIG_FT_FDC_DMA 2
 174 # endif
 175 #elif CONFIG_FT_ALT_FDC == 1  /* CONFIG_FT_MACH2 */
 176 # if CONFIG_FT_FDC_BASE == 0
 177 #  undef  CONFIG_FT_FDC_BASE
 178 #  define CONFIG_FT_FDC_BASE 0x370
 179 # endif
 180 # if CONFIG_FT_FDC_IRQ == 0
 181 #  undef  CONFIG_FT_FDC_IRQ
 182 #  define CONFIG_FT_FDC_IRQ 6
 183 # endif
 184 # if CONFIG_FT_FDC_DMA == 0
 185 #  undef  CONFIG_FT_FDC_DMA
 186 #  define CONFIG_FT_FDC_DMA 2
 187 # endif
 188 #else                          /* CONFIG_FT_ALT_FDC */
 189 # if CONFIG_FT_FDC_BASE == 0
 190 #  undef  CONFIG_FT_FDC_BASE
 191 #  define CONFIG_FT_FDC_BASE 0x3f0
 192 # endif
 193 # if CONFIG_FT_FDC_IRQ == 0
 194 #  undef  CONFIG_FT_FDC_IRQ
 195 #  define CONFIG_FT_FDC_IRQ 6
 196 # endif
 197 # if CONFIG_FT_FDC_DMA == 0
 198 #  undef  CONFIG_FT_FDC_DMA
 199 #  define CONFIG_FT_FDC_DMA 2
 200 # endif
 201 #endif                         /* standard FDC */
 202
 203 /*      some useful macro's
 204  */
 205 #define ABS(a)          ((a) < 0 ? -(a) : (a))
 206 #define NR_ITEMS(x)     (int)(sizeof(x)/ sizeof(*x))
 207
 208 extern int ftape_init(void);
 209
 210 #endif  /* __KERNEL__ */
 211
 212 #endif