1 #ifndef _FTAPE_HEADER_SEGMENT_H 2 #define _FTAPE_HEADER_SEGMENT_H 3 4 /* 5 * Copyright (C) 1996-1997 Claus-Justus Heine. 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: /homes/cvs/ftape-stacked/include/linux/ftape-header-segment.h,v $ 23 * $Revision: 1.2 $ 24 * $Date: 1997/10/05 19:19:28 $ 25 * 26 * This file defines some offsets into the header segment of a 27 * floppy tape cartridge. For use with the QIC-40/80/3010/3020 28 * floppy-tape driver "ftape" for Linux. 29 */ 30 31 #define FT_SIGNATURE 0 /* must be 0xaa55aa55 */ 32 #define FT_FMT_CODE 4 33 #define FT_REV_LEVEL 5 /* only for QIC-80 since. Rev. L (== 0x0c) */ 34 #define FT_HSEG_1 6 /* first header segment, except for format code 6 */ 35 #define FT_HSEG_2 8 /* second header segment, except for format code 6 */ 36 #define FT_FRST_SEG 10 /* first data segment, except for format code 6 */ 37 #define FT_LAST_SEG 12 /* last data segment, except for format code 6 */ 38 #define FT_FMT_DATE 14 /* date and time of most recent format, see below */ 39 #define FT_WR_DATE 18 /* date and time of most recent write or format */ 40 #define FT_SPT 24 /* segments per track */ 41 #define FT_TPC 26 /* tracks per cartridge */ 42 #define FT_FHM 27 /* floppy drive head (maximum of it) */ 43 #define FT_FTM 28 /* floppy track max. */ 44 #define FT_FSM 29 /* floppy sector max. (128) */ 45 #define FT_LABEL 30 /* floppy tape label */ 46 #define FT_LABEL_DATE 74 /* date and time the tape label was written */ 47 #define FT_LABEL_SZ (FT_LABEL_DATE - FT_LABEL) 48 #define FT_CMAP_START 78 /* starting segment of compression map */ 49 #define FT_FMT_ERROR 128 /* must be set to 0xff if remainder gets lost during 50 * tape format 51 */ 52 #define FT_SEG_CNT 130 /* number of seg. written, formatted or verified 53 * through lifetime of tape (why not read?) 54 */ 55 #define FT_INIT_DATE 138 /* date and time of initial tape format */ 56 #define FT_FMT_CNT 142 /* number of times tape has been formatted */ 57 #define FT_FSL_CNT 144 /* number of segments in failed sector log */ 58 #define FT_MK_CODE 146 /* id string of tape manufacturer */ 59 #define FT_LOT_CODE 190 /* tape manufacturer lot code */ 60 #define FT_6_HSEG_1 234 /* first header segment for format code 6 */ 61 #define FT_6_HSEG_2 238 /* second header segment for format code 6 */ 62 #define FT_6_FRST_SEG 242 /* first data segment for format code 6 */ 63 #define FT_6_LAST_SEG 246 /* last data segment for format code 6 */ 64 65 #define FT_FSL 256 66 #define FT_HEADER_END 256 /* space beyond this point: 67 * format codes 2, 3 and 5: 68 * - failed sector log until byte 2047 69 * - bad sector map in the reamining part of segment 70 * format codes 4 and 6: 71 * - bad sector map starts hear 72 */ 73 74 75 /* value to be stored at the FT_SIGNATURE offset 76 */ 77 #define FT_HSEG_MAGIC 0xaa55aa55 78 #define FT_D2G_MAGIC 0x82288228 /* Ditto 2GB */ 79 80 /* data and time encoding: */ 81 #define FT_YEAR_SHIFT 25 82 #define FT_YEAR_MASK 0xfe000000 83 #define FT_YEAR_0 1970 84 #define FT_YEAR_MAX 127 85 #define FT_YEAR(year) ((((year)-FT_YEAR_0)<<FT_YEAR_SHIFT)&FT_YEAR_MASK) 86 87 #define FT_TIME_SHIFT 0 88 #define FT_TIME_MASK 0x01FFFFFF 89 #define FT_TIME_MAX 0x01ea6dff /* last second of a year */ 90 #define FT_TIME(mo,d,h,m,s) \ 91 ((((s)+60*((m)+60*((h)+24*((d)+31*(mo))))) & FT_TIME_MASK)) 92 93 #define FT_TIME_STAMP(y,mo,d,h,m,s) (FT_YEAR(y) | FT_TIME(mo,d,h,m,s)) 94 95 /* values for the format code field */ 96 typedef enum { 97 fmt_normal = 2, /* QIC-80 post Rev. B 205Ft or 307Ft tape */ 98 fmt_1100ft = 3, /* QIC-80 post Rev. B 1100Ft tape */ 99 fmt_var = 4, /* QIC-80 post Rev. B variabel length format */ 100 fmt_425ft = 5, /* QIC-80 post Rev. B 425Ft tape */ 101 fmt_big = 6 /* QIC-3010/3020 variable length tape with more 102 * than 2^16 segments per tape 103 */ 104 } ft_format_type; 105 106 /* definitions for the failed sector log */ 107 #define FT_FSL_SIZE (2 * FT_SECTOR_SIZE - FT_HEADER_END) 108 #define FT_FSL_MAX_ENTRIES (FT_FSL_SIZE/sizeof(__u32)) 109 110 typedef struct ft_fsl_entry { 111 __u16 segment; 112 __u16 date; 113 } __attribute__ ((packed)) ft_fsl_entry; 114 115 116 /* date encoding for the failed sector log 117 * month: 1..12, day: 1..31, year: 1970..2097 118 */ 119 #define FT_FSL_TIME_STAMP(y,m,d) \ 120 (((((y) - FT_YEAR_0)<<9)&0xfe00) | (((m)<<5)&0x01e0) | ((d)&0x001f)) 121 122 #endif /* _FTAPE_HEADER_SEGMENT_H */ 123