diff options
Diffstat (limited to 'firmware/drivers/fat.h')
| -rw-r--r-- | firmware/drivers/fat.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/firmware/drivers/fat.h b/firmware/drivers/fat.h new file mode 100644 index 0000000000..f1dc8dc5a0 --- /dev/null +++ b/firmware/drivers/fat.h @@ -0,0 +1,154 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2002 by Linus Nielsen Feltzing + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#ifndef FAT_H +#define FAT_H + +#define FATTYPE_FAT12 0 +#define FATTYPE_FAT16 1 +#define FATTYPE_FAT32 2 + +#define BS_JMPBOOT 0 +#define BS_OEMNAME 3 +#define BPB_BYTSPERSEC 11 +#define BPB_SECPERCLUS 13 +#define BPB_RSVDSECCNT 14 +#define BPB_NUMFATS 16 +#define BPB_ROOTENTCNT 17 +#define BPB_TOTSEC16 19 +#define BPB_MEDIA 21 +#define BPB_FATSZ16 22 +#define BPB_SECPERTRK 24 +#define BPB_NUMHEADS 26 +#define BPB_HIDDSEC 28 +#define BPB_TOTSEC32 32 + +#define BS_DRVNUM 36 +#define BS_RESERVED1 37 +#define BS_BOOTSIG 38 +#define BS_VOLID 39 +#define BS_VOLLAB 43 +#define BS_FILSYSTYPE 54 + +#define BPB_FATSZ32 36 + +#define BPB_LAST_WORD 510 + +#define MIN(a,b) (((a) < (b))?(a):(b))) + +struct bpb +{ + char bs_oemname[9]; /* OEM string, ending with \0 */ + int bpb_bytspersec; /* Bytes per sectory, typically 512 */ + int bpb_secperclus; /* Sectors per cluster */ + int bpb_rsvdseccnt; /* Number of reserved sectors */ + int bpb_numfats; /* Number of FAT structures, typically 2 */ + int bpb_rootentcnt; /* Number of dir entries in the root */ + int bpb_totsec16; /* Number of sectors on the volume (old 16-bit) */ + int bpb_media; /* Media type (typically 0xf0 or 0xf8) */ + int bpb_fatsz16; /* Number of used sectors per FAT structure */ + int bpb_secpertrk; /* Number of sectors per track */ + int bpb_numheads; /* Number of heads */ + int bpb_hiddsec; /* Hidden sectors before the volume */ + unsigned int bpb_totsec32; /* Number of sectors on the volume + (new 32-bit) */ + /**** FAT12/16 specific *****/ + int bs_drvnum; /* Drive number */ + int bs_bootsig; /* Is 0x29 if the following 3 fields are valid */ + unsigned int bs_volid; /* Volume ID */ + char bs_vollab[12]; /* Volume label, 11 chars plus \0 */ + char bs_filsystype[9]; /* File system type, 8 chars plus \0 */ + + /**** FAT32 specific *****/ + int bpb_fatsz32; + + int last_word; /* Must be 0xaa55 */ + + int fat_type; /* What type of FAT is this? */ +}; + +#define FAT_ATTR_READ_ONLY 0x01 +#define FAT_ATTR_HIDDEN 0x02 +#define FAT_ATTR_SYSTEM 0x04 +#define FAT_ATTR_VOLUME_ID 0x08 +#define FAT_ATTR_DIRECTORY 0x10 +#define FAT_ATTR_ARCHIVE 0x20 +#define FAT_ATTR_LONG_NAME (FAT_ATTR_READ_ONLY | FAT_ATTR_HIDDEN | \ + FAT_ATTR_SYSTEM | FAT_ATTR_VOLUME_ID) + + +#define FATDIR_NAME 0 +#define FATDIR_ATTR 11 +#define FATDIR_NTRES 12 +#define FATDIR_CRTTIMETENTH 13 +#define FATDIR_CRTTIME 14 +#define FATDIR_CRTDATE 16 +#define FATDIR_LSTACCDATE 18 +#define FATDIR_FSTCLUSHI 20 +#define FATDIR_WRTTIME 22 +#define FATDIR_WRTDATE 24 +#define FATDIR_FSTCLUSLO 26 +#define FATDIR_FILESIZE 28 + +struct fat_direntry +{ + unsigned char name[12]; /* Name plus \0 */ + unsigned short attr; /* Attributes */ + unsigned char crttimetenth; /* Millisecond creation + time stamp (0-199) */ + unsigned short crttime; /* Creation time */ + unsigned short crtdate; /* Creation date */ + unsigned short lstaccdate; /* Last access date */ + unsigned short fstclushi; /* High word of first cluster + (0 for FAT12/16) */ + unsigned short wrttime; /* Last write time */ + unsigned short wrtdate; /* Last write date */ + unsigned short fstcluslo; /* Low word of first cluster */ + unsigned int filesize; /* File size in bytes */ +}; + +struct fat_context +{ + unsigned int curr_dir_sec; /* Current directory sector */ + +}; + +struct disk_info +{ + int num_sectors; + int sec_per_track; + int num_heads; + unsigned int hidden_sectors; +}; + +struct fat_dirent +{ + int entry; + unsigned int cached_sec; + unsigned int num_sec; + char cached_buf[BLOCK_SIZE]; +}; + +int fat_format(struct disk_info *di, char *vol_name); +int fat_create_file(struct bpb *bpb, unsigned int currdir, char *name); +int fat_opendir(struct bpb *bpb, struct fat_dirent *ent, unsigned int currdir); +int fat_getnext(struct bpb *bpb, struct fat_dirent *ent, + struct fat_direntry *entry); + +#endif |