123 lines
5.1 KiB
C
123 lines
5.1 KiB
C
#ifndef _FTAPE_HEADER_SEGMENT_H
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#define _FTAPE_HEADER_SEGMENT_H
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/*
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* Copyright (C) 1996-1997 Claus-Justus Heine.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Source: /homes/cvs/ftape-stacked/include/linux/ftape-header-segment.h,v $
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* $Revision: 1.2 $
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* $Date: 1997/10/05 19:19:28 $
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*
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* This file defines some offsets into the header segment of a
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* floppy tape cartridge. For use with the QIC-40/80/3010/3020
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* floppy-tape driver "ftape" for Linux.
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*/
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#define FT_SIGNATURE 0 /* must be 0xaa55aa55 */
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#define FT_FMT_CODE 4
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#define FT_REV_LEVEL 5 /* only for QIC-80 since. Rev. L (== 0x0c) */
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#define FT_HSEG_1 6 /* first header segment, except for format code 6 */
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#define FT_HSEG_2 8 /* second header segment, except for format code 6 */
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#define FT_FRST_SEG 10 /* first data segment, except for format code 6 */
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#define FT_LAST_SEG 12 /* last data segment, except for format code 6 */
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#define FT_FMT_DATE 14 /* date and time of most recent format, see below */
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#define FT_WR_DATE 18 /* date and time of most recent write or format */
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#define FT_SPT 24 /* segments per track */
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#define FT_TPC 26 /* tracks per cartridge */
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#define FT_FHM 27 /* floppy drive head (maximum of it) */
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#define FT_FTM 28 /* floppy track max. */
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#define FT_FSM 29 /* floppy sector max. (128) */
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#define FT_LABEL 30 /* floppy tape label */
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#define FT_LABEL_DATE 74 /* date and time the tape label was written */
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#define FT_LABEL_SZ (FT_LABEL_DATE - FT_LABEL)
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#define FT_CMAP_START 78 /* starting segment of compression map */
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#define FT_FMT_ERROR 128 /* must be set to 0xff if remainder gets lost during
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* tape format
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*/
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#define FT_SEG_CNT 130 /* number of seg. written, formatted or verified
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* through lifetime of tape (why not read?)
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*/
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#define FT_INIT_DATE 138 /* date and time of initial tape format */
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#define FT_FMT_CNT 142 /* number of times tape has been formatted */
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#define FT_FSL_CNT 144 /* number of segments in failed sector log */
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#define FT_MK_CODE 146 /* id string of tape manufacturer */
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#define FT_LOT_CODE 190 /* tape manufacturer lot code */
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#define FT_6_HSEG_1 234 /* first header segment for format code 6 */
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#define FT_6_HSEG_2 238 /* second header segment for format code 6 */
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#define FT_6_FRST_SEG 242 /* first data segment for format code 6 */
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#define FT_6_LAST_SEG 246 /* last data segment for format code 6 */
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#define FT_FSL 256
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#define FT_HEADER_END 256 /* space beyond this point:
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* format codes 2, 3 and 5:
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* - failed sector log until byte 2047
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* - bad sector map in the reamining part of segment
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* format codes 4 and 6:
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* - bad sector map starts hear
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*/
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/* value to be stored at the FT_SIGNATURE offset
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*/
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#define FT_HSEG_MAGIC 0xaa55aa55
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#define FT_D2G_MAGIC 0x82288228 /* Ditto 2GB */
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/* data and time encoding: */
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#define FT_YEAR_SHIFT 25
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#define FT_YEAR_MASK 0xfe000000
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#define FT_YEAR_0 1970
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#define FT_YEAR_MAX 127
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#define FT_YEAR(year) ((((year)-FT_YEAR_0)<<FT_YEAR_SHIFT)&FT_YEAR_MASK)
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#define FT_TIME_SHIFT 0
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#define FT_TIME_MASK 0x01FFFFFF
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#define FT_TIME_MAX 0x01ea6dff /* last second of a year */
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#define FT_TIME(mo,d,h,m,s) \
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((((s)+60*((m)+60*((h)+24*((d)+31*(mo))))) & FT_TIME_MASK))
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#define FT_TIME_STAMP(y,mo,d,h,m,s) (FT_YEAR(y) | FT_TIME(mo,d,h,m,s))
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/* values for the format code field */
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typedef enum {
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fmt_normal = 2, /* QIC-80 post Rev. B 205Ft or 307Ft tape */
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fmt_1100ft = 3, /* QIC-80 post Rev. B 1100Ft tape */
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fmt_var = 4, /* QIC-80 post Rev. B variabel length format */
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fmt_425ft = 5, /* QIC-80 post Rev. B 425Ft tape */
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fmt_big = 6 /* QIC-3010/3020 variable length tape with more
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* than 2^16 segments per tape
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*/
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} ft_format_type;
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/* definitions for the failed sector log */
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#define FT_FSL_SIZE (2 * FT_SECTOR_SIZE - FT_HEADER_END)
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#define FT_FSL_MAX_ENTRIES (FT_FSL_SIZE/sizeof(__u32))
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typedef struct ft_fsl_entry {
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__u16 segment;
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__u16 date;
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} __attribute__ ((packed)) ft_fsl_entry;
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/* date encoding for the failed sector log
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* month: 1..12, day: 1..31, year: 1970..2097
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*/
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#define FT_FSL_TIME_STAMP(y,m,d) \
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(((((y) - FT_YEAR_0)<<9)&0xfe00) | (((m)<<5)&0x01e0) | ((d)&0x001f))
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#endif /* _FTAPE_HEADER_SEGMENT_H */
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