4 * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
6 * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
7 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/byteorder.h>
34 #if defined(CONFIG_CMD_FAT)
37 * Convert a string to lowercase.
42 while (*str
!= '\0') {
48 static block_dev_desc_t
*cur_dev
= NULL
;
49 static unsigned long part_offset
= 0;
50 static int cur_part
= 1;
52 #define DOS_PART_TBL_OFFSET 0x1be
53 #define DOS_PART_MAGIC_OFFSET 0x1fe
54 #define DOS_FS_TYPE_OFFSET 0x36
56 int disk_read (__u32 startblock
, __u32 getsize
, __u8
* bufptr
)
58 startblock
+= part_offset
;
61 if (cur_dev
->block_read
) {
62 return cur_dev
->block_read (cur_dev
->dev
63 , startblock
, getsize
, (unsigned long *)bufptr
);
70 fat_register_device(block_dev_desc_t
*dev_desc
, int part_no
)
72 unsigned char buffer
[SECTOR_SIZE
];
74 if (!dev_desc
->block_read
)
77 /* check if we have a MBR (on floppies we have only a PBR) */
78 if (dev_desc
->block_read (dev_desc
->dev
, 0, 1, (ulong
*) buffer
) != 1) {
79 printf ("** Can't read from device %d **\n", dev_desc
->dev
);
82 if (buffer
[DOS_PART_MAGIC_OFFSET
] != 0x55 ||
83 buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) {
84 /* no signature found */
87 if(!strncmp((char *)&buffer
[DOS_FS_TYPE_OFFSET
],"FAT",3)) {
88 /* ok, we assume we are on a PBR only */
93 #if (defined(CONFIG_CMD_IDE) || \
94 defined(CONFIG_CMD_SCSI) || \
95 defined(CONFIG_CMD_USB) || \
96 (defined(CONFIG_MMC) && defined(CONFIG_LPC2292)) || \
97 defined(CONFIG_SYSTEMACE) )
98 disk_partition_t info
;
99 if(!get_partition_info(dev_desc
, part_no
, &info
)) {
100 part_offset
= info
.start
;
104 printf ("** Partition %d not valid on device %d **\n",part_no
,dev_desc
->dev
);
108 /* FIXME we need to determine the start block of the
109 * partition where the DOS FS resides. This can be done
110 * by using the get_partition_info routine. For this
111 * purpose the libpart must be included.
122 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
123 * Return index into string if found, -1 otherwise.
130 while (*str
!= '\0') {
131 if (ISDIRDELIM(*str
)) return str
- start
;
139 * Match volume_info fs_type strings.
140 * Return 0 on match, -1 otherwise.
143 compare_sign(char *str1
, char *str2
)
145 char *end
= str1
+SIGNLEN
;
147 while (str1
!= end
) {
148 if (*str1
!= *str2
) {
160 * Extract zero terminated short name from a directory entry.
162 static void get_name (dir_entry
*dirent
, char *s_name
)
166 memcpy (s_name
, dirent
->name
, 8);
169 while (*ptr
&& *ptr
!= ' ')
171 if (dirent
->ext
[0] && dirent
->ext
[0] != ' ') {
174 memcpy (ptr
, dirent
->ext
, 3);
176 while (*ptr
&& *ptr
!= ' ')
180 if (*s_name
== DELETED_FLAG
)
182 else if (*s_name
== aRING
)
188 * Get the entry at index 'entry' in a FAT (12/16/32) table.
189 * On failure 0x00 is returned.
192 get_fatent(fsdata
*mydata
, __u32 entry
)
198 switch (mydata
->fatsize
) {
200 bufnum
= entry
/ FAT32BUFSIZE
;
201 offset
= entry
- bufnum
* FAT32BUFSIZE
;
204 bufnum
= entry
/ FAT16BUFSIZE
;
205 offset
= entry
- bufnum
* FAT16BUFSIZE
;
208 bufnum
= entry
/ FAT12BUFSIZE
;
209 offset
= entry
- bufnum
* FAT12BUFSIZE
;
213 /* Unsupported FAT size */
217 /* Read a new block of FAT entries into the cache. */
218 if (bufnum
!= mydata
->fatbufnum
) {
219 int getsize
= FATBUFSIZE
/FS_BLOCK_SIZE
;
220 __u8
*bufptr
= mydata
->fatbuf
;
221 __u32 fatlength
= mydata
->fatlength
;
222 __u32 startblock
= bufnum
* FATBUFBLOCKS
;
224 fatlength
*= SECTOR_SIZE
; /* We want it in bytes now */
225 startblock
+= mydata
->fat_sect
; /* Offset from start of disk */
227 if (getsize
> fatlength
) getsize
= fatlength
;
228 if (disk_read(startblock
, getsize
, bufptr
) < 0) {
229 FAT_DPRINT("Error reading FAT blocks\n");
232 mydata
->fatbufnum
= bufnum
;
235 /* Get the actual entry from the table */
236 switch (mydata
->fatsize
) {
238 ret
= FAT2CPU32(((__u32
*)mydata
->fatbuf
)[offset
]);
241 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[offset
]);
244 __u32 off16
= (offset
*3)/4;
247 switch (offset
& 0x3) {
249 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
253 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
255 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+1]);
257 ret
= (val2
<< 4) | (val1
>> 12);
260 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
262 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+1]);
264 ret
= (val2
<< 8) | (val1
>> 8);
267 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);;
268 ret
= (ret
& 0xfff0) >> 4;
276 FAT_DPRINT("ret: %d, offset: %d\n", ret
, offset
);
283 * Read at most 'size' bytes from the specified cluster into 'buffer'.
284 * Return 0 on success, -1 otherwise.
287 get_cluster(fsdata
*mydata
, __u32 clustnum
, __u8
*buffer
, unsigned long size
)
293 startsect
= mydata
->data_begin
+ clustnum
*mydata
->clust_size
;
295 startsect
= mydata
->rootdir_sect
;
298 FAT_DPRINT("gc - clustnum: %d, startsect: %d\n", clustnum
, startsect
);
299 if (disk_read(startsect
, size
/FS_BLOCK_SIZE
, buffer
) < 0) {
300 FAT_DPRINT("Error reading data\n");
303 if(size
% FS_BLOCK_SIZE
) {
304 __u8 tmpbuf
[FS_BLOCK_SIZE
];
305 idx
= size
/FS_BLOCK_SIZE
;
306 if (disk_read(startsect
+ idx
, 1, tmpbuf
) < 0) {
307 FAT_DPRINT("Error reading data\n");
310 buffer
+= idx
*FS_BLOCK_SIZE
;
312 memcpy(buffer
, tmpbuf
, size
% FS_BLOCK_SIZE
);
321 * Read at most 'maxsize' bytes from the file associated with 'dentptr'
323 * Return the number of bytes read or -1 on fatal errors.
326 get_contents(fsdata
*mydata
, dir_entry
*dentptr
, __u8
*buffer
,
327 unsigned long maxsize
)
329 unsigned long filesize
= FAT2CPU32(dentptr
->size
), gotsize
= 0;
330 unsigned int bytesperclust
= mydata
->clust_size
* SECTOR_SIZE
;
331 __u32 curclust
= START(dentptr
);
332 __u32 endclust
, newclust
;
333 unsigned long actsize
;
335 FAT_DPRINT("Filesize: %ld bytes\n", filesize
);
337 if (maxsize
> 0 && filesize
> maxsize
) filesize
= maxsize
;
339 FAT_DPRINT("Reading: %ld bytes\n", filesize
);
341 actsize
=bytesperclust
;
344 /* search for consecutive clusters */
345 while(actsize
< filesize
) {
346 newclust
= get_fatent(mydata
, endclust
);
347 if((newclust
-1)!=endclust
)
349 if (newclust
<= 0x0001 || newclust
>= 0xfff0) {
350 FAT_DPRINT("curclust: 0x%x\n", newclust
);
351 FAT_DPRINT("Invalid FAT entry\n");
355 actsize
+= bytesperclust
;
357 /* actsize >= file size */
358 actsize
-= bytesperclust
;
359 /* get remaining clusters */
360 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
361 FAT_ERROR("Error reading cluster\n");
364 /* get remaining bytes */
365 gotsize
+= (int)actsize
;
369 if (get_cluster(mydata
, endclust
, buffer
, (int)actsize
) != 0) {
370 FAT_ERROR("Error reading cluster\n");
376 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
377 FAT_ERROR("Error reading cluster\n");
380 gotsize
+= (int)actsize
;
383 curclust
= get_fatent(mydata
, endclust
);
384 if (curclust
<= 0x0001 || curclust
>= 0xfff0) {
385 FAT_DPRINT("curclust: 0x%x\n", curclust
);
386 FAT_ERROR("Invalid FAT entry\n");
389 actsize
=bytesperclust
;
395 #ifdef CONFIG_SUPPORT_VFAT
397 * Extract the file name information from 'slotptr' into 'l_name',
398 * starting at l_name[*idx].
399 * Return 1 if terminator (zero byte) is found, 0 otherwise.
402 slot2str(dir_slot
*slotptr
, char *l_name
, int *idx
)
406 for (j
= 0; j
<= 8; j
+= 2) {
407 l_name
[*idx
] = slotptr
->name0_4
[j
];
408 if (l_name
[*idx
] == 0x00) return 1;
411 for (j
= 0; j
<= 10; j
+= 2) {
412 l_name
[*idx
] = slotptr
->name5_10
[j
];
413 if (l_name
[*idx
] == 0x00) return 1;
416 for (j
= 0; j
<= 2; j
+= 2) {
417 l_name
[*idx
] = slotptr
->name11_12
[j
];
418 if (l_name
[*idx
] == 0x00) return 1;
427 * Extract the full long filename starting at 'retdent' (which is really
428 * a slot) into 'l_name'. If successful also copy the real directory entry
430 * Return 0 on success, -1 otherwise.
432 __u8 get_vfatname_block
[MAX_CLUSTSIZE
];
434 get_vfatname(fsdata
*mydata
, int curclust
, __u8
*cluster
,
435 dir_entry
*retdent
, char *l_name
)
438 dir_slot
*slotptr
= (dir_slot
*) retdent
;
439 __u8
*nextclust
= cluster
+ mydata
->clust_size
* SECTOR_SIZE
;
440 __u8 counter
= (slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff;
443 while ((__u8
*)slotptr
< nextclust
) {
444 if (counter
== 0) break;
445 if (((slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff) != counter
)
451 if ((__u8
*)slotptr
>= nextclust
) {
455 curclust
= get_fatent(mydata
, curclust
);
456 if (curclust
<= 0x0001 || curclust
>= 0xfff0) {
457 FAT_DPRINT("curclust: 0x%x\n", curclust
);
458 FAT_ERROR("Invalid FAT entry\n");
461 if (get_cluster(mydata
, curclust
, get_vfatname_block
,
462 mydata
->clust_size
* SECTOR_SIZE
) != 0) {
463 FAT_DPRINT("Error: reading directory block\n");
466 slotptr2
= (dir_slot
*) get_vfatname_block
;
467 while (slotptr2
->id
> 0x01) {
470 /* Save the real directory entry */
471 realdent
= (dir_entry
*)slotptr2
+ 1;
472 while ((__u8
*)slotptr2
>= get_vfatname_block
) {
473 slot2str(slotptr2
, l_name
, &idx
);
477 /* Save the real directory entry */
478 realdent
= (dir_entry
*)slotptr
;
483 if (slot2str(slotptr
, l_name
, &idx
)) break;
484 } while (!(slotptr
->id
& LAST_LONG_ENTRY_MASK
));
487 if (*l_name
== DELETED_FLAG
) *l_name
= '\0';
488 else if (*l_name
== aRING
) *l_name
= 'å';
491 /* Return the real directory entry */
492 memcpy(retdent
, realdent
, sizeof(dir_entry
));
498 /* Calculate short name checksum */
500 mkcksum(const char *str
)
505 for (i
= 0; i
< 11; i
++) {
506 ret
= (((ret
&1)<<7)|((ret
&0xfe)>>1)) + str
[i
];
515 * Get the directory entry associated with 'filename' from the directory
516 * starting at 'startsect'
518 __u8 get_dentfromdir_block
[MAX_CLUSTSIZE
];
519 static dir_entry
*get_dentfromdir (fsdata
* mydata
, int startsect
,
520 char *filename
, dir_entry
* retdent
,
523 __u16 prevcksum
= 0xffff;
524 __u32 curclust
= START (retdent
);
525 int files
= 0, dirs
= 0;
527 FAT_DPRINT ("get_dentfromdir: %s\n", filename
);
532 if (get_cluster (mydata
, curclust
, get_dentfromdir_block
,
533 mydata
->clust_size
* SECTOR_SIZE
) != 0) {
534 FAT_DPRINT ("Error: reading directory block\n");
537 dentptr
= (dir_entry
*) get_dentfromdir_block
;
538 for (i
= 0; i
< DIRENTSPERCLUST
; i
++) {
539 char s_name
[14], l_name
[256];
542 if (dentptr
->name
[0] == DELETED_FLAG
) {
546 if ((dentptr
->attr
& ATTR_VOLUME
)) {
547 #ifdef CONFIG_SUPPORT_VFAT
548 if ((dentptr
->attr
& ATTR_VFAT
) &&
549 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
550 prevcksum
= ((dir_slot
*) dentptr
)
552 get_vfatname (mydata
, curclust
, get_dentfromdir_block
,
555 int isdir
= (dentptr
->attr
& ATTR_DIR
);
565 if (l_name
[0] != 0) {
572 printf (" %8ld %s%c\n",
573 (long) FAT2CPU32 (dentptr
->size
),
576 printf (" %s%c\n", l_name
, dirc
);
582 FAT_DPRINT ("vfatname: |%s|\n", l_name
);
586 /* Volume label or VFAT entry */
591 if (dentptr
->name
[0] == 0) {
593 printf ("\n%d file(s), %d dir(s)\n\n", files
, dirs
);
595 FAT_DPRINT ("Dentname == NULL - %d\n", i
);
598 #ifdef CONFIG_SUPPORT_VFAT
599 if (dols
&& mkcksum (dentptr
->name
) == prevcksum
) {
604 get_name (dentptr
, s_name
);
606 int isdir
= (dentptr
->attr
& ATTR_DIR
);
616 if (s_name
[0] != 0) {
623 printf (" %8ld %s%c\n",
624 (long) FAT2CPU32 (dentptr
->size
), s_name
,
627 printf (" %s%c\n", s_name
, dirc
);
633 if (strcmp (filename
, s_name
) && strcmp (filename
, l_name
)) {
634 FAT_DPRINT ("Mismatch: |%s|%s|\n", s_name
, l_name
);
638 memcpy (retdent
, dentptr
, sizeof (dir_entry
));
640 FAT_DPRINT ("DentName: %s", s_name
);
641 FAT_DPRINT (", start: 0x%x", START (dentptr
));
642 FAT_DPRINT (", size: 0x%x %s\n",
643 FAT2CPU32 (dentptr
->size
),
644 (dentptr
->attr
& ATTR_DIR
) ? "(DIR)" : "");
648 curclust
= get_fatent (mydata
, curclust
);
649 if (curclust
<= 0x0001 || curclust
>= 0xfff0) {
650 FAT_DPRINT ("curclust: 0x%x\n", curclust
);
651 FAT_ERROR ("Invalid FAT entry\n");
661 * Read boot sector and volume info from a FAT filesystem
664 read_bootsectandvi(boot_sector
*bs
, volume_info
*volinfo
, int *fatsize
)
666 __u8 block
[FS_BLOCK_SIZE
];
667 volume_info
*vistart
;
669 if (disk_read(0, 1, block
) < 0) {
670 FAT_DPRINT("Error: reading block\n");
674 memcpy(bs
, block
, sizeof(boot_sector
));
675 bs
->reserved
= FAT2CPU16(bs
->reserved
);
676 bs
->fat_length
= FAT2CPU16(bs
->fat_length
);
677 bs
->secs_track
= FAT2CPU16(bs
->secs_track
);
678 bs
->heads
= FAT2CPU16(bs
->heads
);
680 bs
->hidden
= FAT2CPU32(bs
->hidden
);
682 bs
->total_sect
= FAT2CPU32(bs
->total_sect
);
685 if (bs
->fat_length
== 0) {
687 bs
->fat32_length
= FAT2CPU32(bs
->fat32_length
);
688 bs
->flags
= FAT2CPU16(bs
->flags
);
689 bs
->root_cluster
= FAT2CPU32(bs
->root_cluster
);
690 bs
->info_sector
= FAT2CPU16(bs
->info_sector
);
691 bs
->backup_boot
= FAT2CPU16(bs
->backup_boot
);
692 vistart
= (volume_info
*) (block
+ sizeof(boot_sector
));
695 vistart
= (volume_info
*) &(bs
->fat32_length
);
698 memcpy(volinfo
, vistart
, sizeof(volume_info
));
700 /* Terminate fs_type string. Writing past the end of vistart
701 is ok - it's just the buffer. */
702 vistart
->fs_type
[8] = '\0';
704 if (*fatsize
== 32) {
705 if (compare_sign(FAT32_SIGN
, vistart
->fs_type
) == 0) {
709 if (compare_sign(FAT12_SIGN
, vistart
->fs_type
) == 0) {
713 if (compare_sign(FAT16_SIGN
, vistart
->fs_type
) == 0) {
719 FAT_DPRINT("Error: broken fs_type sign\n");
724 __u8 do_fat_read_block
[MAX_CLUSTSIZE
]; /* Block buffer */
726 do_fat_read (const char *filename
, void *buffer
, unsigned long maxsize
,
729 #if CONFIG_NIOS /* NIOS CPU cannot access big automatic arrays */
732 char fnamecopy
[2048];
736 fsdata
*mydata
= &datablock
;
738 __u16 prevcksum
= 0xffff;
740 int rootdir_size
, cursect
;
742 int files
= 0, dirs
= 0;
746 if (read_bootsectandvi (&bs
, &volinfo
, &mydata
->fatsize
)) {
747 FAT_DPRINT ("Error: reading boot sector\n");
750 if (mydata
->fatsize
== 32) {
751 mydata
->fatlength
= bs
.fat32_length
;
753 mydata
->fatlength
= bs
.fat_length
;
755 mydata
->fat_sect
= bs
.reserved
;
756 cursect
= mydata
->rootdir_sect
757 = mydata
->fat_sect
+ mydata
->fatlength
* bs
.fats
;
758 mydata
->clust_size
= bs
.cluster_size
;
759 if (mydata
->fatsize
== 32) {
760 rootdir_size
= mydata
->clust_size
;
761 mydata
->data_begin
= mydata
->rootdir_sect
/* + rootdir_size */
762 - (mydata
->clust_size
* 2);
764 rootdir_size
= ((bs
.dir_entries
[1] * (int) 256 + bs
.dir_entries
[0])
765 * sizeof (dir_entry
)) / SECTOR_SIZE
;
766 mydata
->data_begin
= mydata
->rootdir_sect
+ rootdir_size
767 - (mydata
->clust_size
* 2);
769 mydata
->fatbufnum
= -1;
771 FAT_DPRINT ("FAT%d, fatlength: %d\n", mydata
->fatsize
,
773 FAT_DPRINT ("Rootdir begins at sector: %d, offset: %x, size: %d\n"
774 "Data begins at: %d\n",
775 mydata
->rootdir_sect
, mydata
->rootdir_sect
* SECTOR_SIZE
,
776 rootdir_size
, mydata
->data_begin
);
777 FAT_DPRINT ("Cluster size: %d\n", mydata
->clust_size
);
779 /* "cwd" is always the root... */
780 while (ISDIRDELIM (*filename
))
782 /* Make a copy of the filename and convert it to lowercase */
783 strcpy (fnamecopy
, filename
);
784 downcase (fnamecopy
);
785 if (*fnamecopy
== '\0') {
789 } else if ((idx
= dirdelim (fnamecopy
)) >= 0) {
791 fnamecopy
[idx
] = '\0';
792 subname
= fnamecopy
+ idx
+ 1;
793 /* Handle multiple delimiters */
794 while (ISDIRDELIM (*subname
))
803 if (disk_read (cursect
, mydata
->clust_size
, do_fat_read_block
) < 0) {
804 FAT_DPRINT ("Error: reading rootdir block\n");
807 dentptr
= (dir_entry
*) do_fat_read_block
;
808 for (i
= 0; i
< DIRENTSPERBLOCK
; i
++) {
809 char s_name
[14], l_name
[256];
812 if ((dentptr
->attr
& ATTR_VOLUME
)) {
813 #ifdef CONFIG_SUPPORT_VFAT
814 if ((dentptr
->attr
& ATTR_VFAT
) &&
815 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
816 prevcksum
= ((dir_slot
*) dentptr
)->alias_checksum
;
817 get_vfatname (mydata
, 0, do_fat_read_block
, dentptr
, l_name
);
818 if (dols
== LS_ROOT
) {
819 int isdir
= (dentptr
->attr
& ATTR_DIR
);
829 if (l_name
[0] != 0) {
836 printf (" %8ld %s%c\n",
837 (long) FAT2CPU32 (dentptr
->size
),
840 printf (" %s%c\n", l_name
, dirc
);
846 FAT_DPRINT ("Rootvfatname: |%s|\n", l_name
);
850 /* Volume label or VFAT entry */
854 } else if (dentptr
->name
[0] == 0) {
855 FAT_DPRINT ("RootDentname == NULL - %d\n", i
);
856 if (dols
== LS_ROOT
) {
857 printf ("\n%d file(s), %d dir(s)\n\n", files
, dirs
);
862 #ifdef CONFIG_SUPPORT_VFAT
863 else if (dols
== LS_ROOT
864 && mkcksum (dentptr
->name
) == prevcksum
) {
869 get_name (dentptr
, s_name
);
870 if (dols
== LS_ROOT
) {
871 int isdir
= (dentptr
->attr
& ATTR_DIR
);
877 if (s_name
[0] != 0) {
883 if (s_name
[0] != 0) {
890 printf (" %8ld %s%c\n",
891 (long) FAT2CPU32 (dentptr
->size
), s_name
,
894 printf (" %s%c\n", s_name
, dirc
);
900 if (strcmp (fnamecopy
, s_name
) && strcmp (fnamecopy
, l_name
)) {
901 FAT_DPRINT ("RootMismatch: |%s|%s|\n", s_name
, l_name
);
905 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
908 FAT_DPRINT ("RootName: %s", s_name
);
909 FAT_DPRINT (", start: 0x%x", START (dentptr
));
910 FAT_DPRINT (", size: 0x%x %s\n",
911 FAT2CPU32 (dentptr
->size
), isdir
? "(DIR)" : "");
913 goto rootdir_done
; /* We got a match */
921 int startsect
= mydata
->data_begin
922 + START (dentptr
) * mydata
->clust_size
;
924 char *nextname
= NULL
;
929 idx
= dirdelim (subname
);
932 nextname
= subname
+ idx
+ 1;
933 /* Handle multiple delimiters */
934 while (ISDIRDELIM (*nextname
))
936 if (dols
&& *nextname
== '\0')
939 if (dols
&& firsttime
) {
946 if (get_dentfromdir (mydata
, startsect
, subname
, dentptr
,
947 isdir
? 0 : dols
) == NULL
) {
954 if (!(dentptr
->attr
& ATTR_DIR
))
959 ret
= get_contents (mydata
, dentptr
, buffer
, maxsize
);
960 FAT_DPRINT ("Size: %d, got: %ld\n", FAT2CPU32 (dentptr
->size
), ret
);
967 file_fat_detectfs(void)
975 printf("No current device\n");
978 #if defined(CONFIG_CMD_IDE) || \
979 defined(CONFIG_CMD_SCSI) || \
980 defined(CONFIG_CMD_USB) || \
982 printf("Interface: ");
983 switch(cur_dev
->if_type
) {
984 case IF_TYPE_IDE
: printf("IDE"); break;
985 case IF_TYPE_SCSI
: printf("SCSI"); break;
986 case IF_TYPE_ATAPI
: printf("ATAPI"); break;
987 case IF_TYPE_USB
: printf("USB"); break;
988 case IF_TYPE_DOC
: printf("DOC"); break;
989 case IF_TYPE_MMC
: printf("MMC"); break;
990 default : printf("Unknown");
992 printf("\n Device %d: ",cur_dev
->dev
);
995 if(read_bootsectandvi(&bs
, &volinfo
, &fatsize
)) {
996 printf("\nNo valid FAT fs found\n");
999 memcpy (vol_label
, volinfo
.volume_label
, 11);
1000 vol_label
[11] = '\0';
1001 volinfo
.fs_type
[5]='\0';
1002 printf("Partition %d: Filesystem: %s \"%s\"\n"
1003 ,cur_part
,volinfo
.fs_type
,vol_label
);
1009 file_fat_ls(const char *dir
)
1011 return do_fat_read(dir
, NULL
, 0, LS_YES
);
1016 file_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
)
1018 printf("reading %s\n",filename
);
1019 return do_fat_read(filename
, buffer
, maxsize
, LS_NO
);