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git01.mediatek.com / filogic / uboot / 5066327ae3d23d1e4011595bd30b80237882e736 / . / fs / fdos / dos.h
blob: b0b7d2aa06b047afd9a608c75c507b1a8341437b [file] [log] [blame]
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]1/*
2 * (C) Copyright 2002
Albert ARIBAUD60fbc8d2011-08-04 18:45:45 +0200[diff] [blame]3 * Stäubli Faverges - <www.staubli.com>
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]4 * Pierre AUBERT p.aubert@staubli.com
5 *
Wolfgang Denkd79de1d2013-07-08 09:37:19 +0200[diff] [blame]6 * SPDX-License-Identifier: GPL-2.0+
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]7 */
8
9#ifndef _DOS_H_
10#define _DOS_H_
11
12/* Definitions for Dos diskettes */
13
14/* General definitions */
15#define SZ_STD_SECTOR 512 /* Standard sector size */
16#define MDIR_SIZE 32 /* Direntry size */
17#define FAT_BITS 12 /* Diskette use 12 bits fat */
18
19#define MAX_PATH 128 /* Max size of the MSDOS PATH */
20#define MAX_DIR_SECS 64 /* Taille max d'un repertoire (en */
wdenk57b2d802003-06-27 21:31:46 +0000[diff] [blame]21 /* secteurs) */
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]22/* Misc. definitions */
23#define DELMARK '\xe5'
24#define EXTENDED_BOOT (0x29)
25#define MEDIA_STD (0xf0)
26#define JUMP_0_1 (0xe9)
27#define JUMP_0_2 (0xeb)
28
29/* Boot size is 256 bytes, but we need to read almost a sector, then
30 assume bootsize is 512 */
31#define BOOTSIZE 512
32
33/* Fat definitions for 12 bits fat */
34#define FAT12_MAX_NB 4086
35#define FAT12_LAST 0x0ff6
36#define FAT12_END 0x0fff
37
38/* file attributes */
39#define ATTR_READONLY 0x01
40#define ATTR_HIDDEN 0x02
41#define ATTR_SYSTEM 0x04
42#define ATTR_VOLUME 0x08
43#define ATTR_DIRECTORY 0x10
44#define ATTR_ARCHIVE 0x20
45#define ATTR_VSE 0x0f
46
47/* Name format */
48#define EXTCASE 0x10
49#define BASECASE 0x8
50
51/* Definition of the boot sector */
52#define BANNER_LG 8
53#define LABEL_LG 11
54
55typedef struct bootsector
56{
57 unsigned char jump [3]; /* 0 Jump to boot code */
58 char banner [BANNER_LG]; /* 3 OEM name & version */
59 unsigned short secsiz; /* 11 Bytes per sector hopefully 512 */
60 unsigned char clsiz; /* 13 Cluster size in sectors */
61 unsigned short nrsvsect; /* 14 Number of reserved (boot) sectors */
62 unsigned char nfat; /* 16 Number of FAT tables hopefully 2 */
63 unsigned short dirents; /* 17 Number of directory slots */
64 unsigned short psect; /* 19 Total sectors on disk */
65 unsigned char descr; /* 21 Media descriptor=first byte of FAT */
66 unsigned short fatlen; /* 22 Sectors in FAT */
67 unsigned short nsect; /* 24 Sectors/track */
68 unsigned short nheads; /* 26 Heads */
69 unsigned int nhs; /* 28 number of hidden sectors */
70 unsigned int bigsect; /* 32 big total sectors */
71 unsigned char physdrive; /* 36 physical drive ? */
72 unsigned char reserved; /* 37 reserved */
73 unsigned char dos4; /* 38 dos > 4.0 diskette */
74 unsigned int serial; /* 39 serial number */
75 char label [LABEL_LG]; /* 43 disk label */
76 char fat_type [8]; /* 54 FAT type */
77 unsigned char res_2m; /* 62 reserved by 2M */
78 unsigned char CheckSum; /* 63 2M checksum (not used) */
79 unsigned char fmt_2mf; /* 64 2MF format version */
80 unsigned char wt; /* 65 1 if write track after format */
81 unsigned char rate_0; /* 66 data transfer rate on track 0 */
82 unsigned char rate_any; /* 67 data transfer rate on track<>0 */
83 unsigned short BootP; /* 68 offset to boot program */
84 unsigned short Infp0; /* 70 T1: information for track 0 */
85 unsigned short InfpX; /* 72 T2: information for track<>0 */
86 unsigned short InfTm; /* 74 T3: track sectors size table */
87 unsigned short DateF; /* 76 Format date */
88 unsigned short TimeF; /* 78 Format time */
89 unsigned char junk [BOOTSIZE - 80]; /* 80 remaining data */
90} __attribute__ ((packed)) BootSector_t;
91
92/* Structure d'une entree de repertoire */
93typedef struct directory {
94 char name [8]; /* file name */
95 char ext [3]; /* file extension */
96 unsigned char attr; /* attribute byte */
97 unsigned char Case; /* case of short filename */
98 unsigned char reserved [9]; /* ?? */
99 unsigned char time [2]; /* time stamp */
100 unsigned char date [2]; /* date stamp */
101 unsigned short start; /* starting cluster number */
102 unsigned int size; /* size of the file */
103} __attribute__ ((packed)) Directory_t;
104
105
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]106#define MAX_VFAT_SUBENTRIES 20
107#define VSE_NAMELEN 13
108
109#define VSE1SIZE 5
110#define VSE2SIZE 6
111#define VSE3SIZE 2
112
113#define VBUFSIZE ((MAX_VFAT_SUBENTRIES * VSE_NAMELEN) + 1)
114
115#define MAX_VNAMELEN (255)
116
117#define VSE_PRESENT 0x01
118#define VSE_LAST 0x40
119#define VSE_MASK 0x1f
120
121/* Flag used by vfat_lookup */
122#define DO_OPEN 1
123#define ACCEPT_PLAIN 0x20
124#define ACCEPT_DIR 0x10
125#define ACCEPT_LABEL 0x08
126#define SINGLE 2
127#define MATCH_ANY 0x40
128
129struct vfat_subentry {
130 unsigned char id; /* VSE_LAST pour la fin, VSE_MASK */
wdenk57b2d802003-06-27 21:31:46 +0000[diff] [blame]131 /* pour un VSE */
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]132 char text1 [VSE1SIZE * 2]; /* Caracteres encodes sur 16 bits */
133 unsigned char attribute; /* 0x0f pour les VFAT */
134 unsigned char hash1; /* toujours 0 */
135 unsigned char sum; /* Checksum du nom court */
136 char text2 [VSE2SIZE * 2]; /* Caracteres encodes sur 16 bits */
137 unsigned char sector_l; /* 0 pour les VFAT */
138 unsigned char sector_u; /* 0 pour les VFAT */
139 char text3 [VSE3SIZE * 2]; /* Caracteres encodes sur 16 bits */
140} __attribute__ ((packed)) ;
141
142struct vfat_state {
143 char name [VBUFSIZE];
144 int status; /* is now a bit map of 32 bits */
145 int subentries;
146 unsigned char sum; /* no need to remember the sum for each */
wdenk57b2d802003-06-27 21:31:46 +0000[diff] [blame]147 /* entry, it is the same anyways */
wdenk591dda52002-11-18 00:14:45 +0000[diff] [blame]148} __attribute__ ((packed)) ;
149
150/* Conversion macros */
151#define DOS_YEAR(dir) (((dir)->date[1] >> 1) + 1980)
152#define DOS_MONTH(dir) (((((dir)->date[1]&0x1) << 3) + ((dir)->date[0] >> 5)))
153#define DOS_DAY(dir) ((dir)->date[0] & 0x1f)
154#define DOS_HOUR(dir) ((dir)->time[1] >> 3)
155#define DOS_MINUTE(dir) (((((dir)->time[1]&0x7) << 3) + ((dir)->time[0] >> 5)))
156#define DOS_SEC(dir) (((dir)->time[0] & 0x1f) * 2)
157
158
159#endif