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422 | giacomo | 1 | #ifndef _FTAPE_HEADER_SEGMENT_H |
2 | #define _FTAPE_HEADER_SEGMENT_H |
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3 | |||
4 | /* |
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5 | * Copyright (C) 1996-1997 Claus-Justus Heine. |
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6 | |||
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 2, or (at your option) |
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10 | any later version. |
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11 | |||
12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; see the file COPYING. If not, write to |
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19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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20 | |||
21 | * |
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22 | * $Source: /home/fabio/w/shark/sharkcvs/CVSROOT/shark/drivers/linuxc26/include/linux/ftape-header-segment.h,v $ |
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23 | * $Revision: 1.1 $ |
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24 | * $Date: 2004-01-28 15:25:20 $ |
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25 | * |
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26 | * This file defines some offsets into the header segment of a |
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27 | * floppy tape cartridge. For use with the QIC-40/80/3010/3020 |
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28 | * floppy-tape driver "ftape" for Linux. |
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29 | */ |
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30 | |||
31 | #define FT_SIGNATURE 0 /* must be 0xaa55aa55 */ |
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32 | #define FT_FMT_CODE 4 |
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33 | #define FT_REV_LEVEL 5 /* only for QIC-80 since. Rev. L (== 0x0c) */ |
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34 | #define FT_HSEG_1 6 /* first header segment, except for format code 6 */ |
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35 | #define FT_HSEG_2 8 /* second header segment, except for format code 6 */ |
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36 | #define FT_FRST_SEG 10 /* first data segment, except for format code 6 */ |
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37 | #define FT_LAST_SEG 12 /* last data segment, except for format code 6 */ |
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38 | #define FT_FMT_DATE 14 /* date and time of most recent format, see below */ |
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39 | #define FT_WR_DATE 18 /* date and time of most recent write or format */ |
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40 | #define FT_SPT 24 /* segments per track */ |
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41 | #define FT_TPC 26 /* tracks per cartridge */ |
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42 | #define FT_FHM 27 /* floppy drive head (maximum of it) */ |
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43 | #define FT_FTM 28 /* floppy track max. */ |
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44 | #define FT_FSM 29 /* floppy sector max. (128) */ |
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45 | #define FT_LABEL 30 /* floppy tape label */ |
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46 | #define FT_LABEL_DATE 74 /* date and time the tape label was written */ |
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47 | #define FT_LABEL_SZ (FT_LABEL_DATE - FT_LABEL) |
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48 | #define FT_CMAP_START 78 /* starting segment of compression map */ |
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49 | #define FT_FMT_ERROR 128 /* must be set to 0xff if remainder gets lost during |
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50 | * tape format |
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51 | */ |
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52 | #define FT_SEG_CNT 130 /* number of seg. written, formatted or verified |
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53 | * through lifetime of tape (why not read?) |
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54 | */ |
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55 | #define FT_INIT_DATE 138 /* date and time of initial tape format */ |
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56 | #define FT_FMT_CNT 142 /* number of times tape has been formatted */ |
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57 | #define FT_FSL_CNT 144 /* number of segments in failed sector log */ |
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58 | #define FT_MK_CODE 146 /* id string of tape manufacturer */ |
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59 | #define FT_LOT_CODE 190 /* tape manufacturer lot code */ |
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60 | #define FT_6_HSEG_1 234 /* first header segment for format code 6 */ |
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61 | #define FT_6_HSEG_2 238 /* second header segment for format code 6 */ |
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62 | #define FT_6_FRST_SEG 242 /* first data segment for format code 6 */ |
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63 | #define FT_6_LAST_SEG 246 /* last data segment for format code 6 */ |
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64 | |||
65 | #define FT_FSL 256 |
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66 | #define FT_HEADER_END 256 /* space beyond this point: |
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67 | * format codes 2, 3 and 5: |
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68 | * - failed sector log until byte 2047 |
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69 | * - bad sector map in the reamining part of segment |
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70 | * format codes 4 and 6: |
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71 | * - bad sector map starts hear |
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72 | */ |
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73 | |||
74 | |||
75 | /* value to be stored at the FT_SIGNATURE offset |
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76 | */ |
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77 | #define FT_HSEG_MAGIC 0xaa55aa55 |
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78 | #define FT_D2G_MAGIC 0x82288228 /* Ditto 2GB */ |
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79 | |||
80 | /* data and time encoding: */ |
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81 | #define FT_YEAR_SHIFT 25 |
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82 | #define FT_YEAR_MASK 0xfe000000 |
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83 | #define FT_YEAR_0 1970 |
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84 | #define FT_YEAR_MAX 127 |
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85 | #define FT_YEAR(year) ((((year)-FT_YEAR_0)<<FT_YEAR_SHIFT)&FT_YEAR_MASK) |
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86 | |||
87 | #define FT_TIME_SHIFT 0 |
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88 | #define FT_TIME_MASK 0x01FFFFFF |
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89 | #define FT_TIME_MAX 0x01ea6dff /* last second of a year */ |
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90 | #define FT_TIME(mo,d,h,m,s) \ |
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91 | ((((s)+60*((m)+60*((h)+24*((d)+31*(mo))))) & FT_TIME_MASK)) |
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92 | |||
93 | #define FT_TIME_STAMP(y,mo,d,h,m,s) (FT_YEAR(y) | FT_TIME(mo,d,h,m,s)) |
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94 | |||
95 | /* values for the format code field */ |
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96 | typedef enum { |
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97 | fmt_normal = 2, /* QIC-80 post Rev. B 205Ft or 307Ft tape */ |
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98 | fmt_1100ft = 3, /* QIC-80 post Rev. B 1100Ft tape */ |
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99 | fmt_var = 4, /* QIC-80 post Rev. B variabel length format */ |
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100 | fmt_425ft = 5, /* QIC-80 post Rev. B 425Ft tape */ |
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101 | fmt_big = 6 /* QIC-3010/3020 variable length tape with more |
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102 | * than 2^16 segments per tape |
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103 | */ |
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104 | } ft_format_type; |
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105 | |||
106 | /* definitions for the failed sector log */ |
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107 | #define FT_FSL_SIZE (2 * FT_SECTOR_SIZE - FT_HEADER_END) |
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108 | #define FT_FSL_MAX_ENTRIES (FT_FSL_SIZE/sizeof(__u32)) |
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109 | |||
110 | typedef struct ft_fsl_entry { |
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111 | __u16 segment; |
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112 | __u16 date; |
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113 | } __attribute__ ((packed)) ft_fsl_entry; |
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114 | |||
115 | |||
116 | /* date encoding for the failed sector log |
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117 | * month: 1..12, day: 1..31, year: 1970..2097 |
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118 | */ |
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119 | #define FT_FSL_TIME_STAMP(y,m,d) \ |
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120 | (((((y) - FT_YEAR_0)<<9)&0xfe00) | (((m)<<5)&0x01e0) | ((d)&0x001f)) |
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121 | |||
122 | #endif /* _FTAPE_HEADER_SEGMENT_H */ |