summaryrefslogtreecommitdiff
path: root/include/linux/ftape-header-segment.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/ftape-header-segment.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/linux/ftape-header-segment.h')
-rw-r--r--include/linux/ftape-header-segment.h122
1 files changed, 122 insertions, 0 deletions
diff --git a/include/linux/ftape-header-segment.h b/include/linux/ftape-header-segment.h
new file mode 100644
index 000000000000..4732218f0708
--- /dev/null
+++ b/include/linux/ftape-header-segment.h
@@ -0,0 +1,122 @@
+#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 */