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