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,
32 #include <asm/byteorder.h>
35 #include <linux/compiler.h>
38 * Convert a string to lowercase.
40 static void downcase(char *str
)
42 while (*str
!= '\0') {
48 static block_dev_desc_t
*cur_dev
;
49 static unsigned int cur_part_nr
;
50 static disk_partition_t cur_part_info
;
52 #define DOS_BOOT_MAGIC_OFFSET 0x1fe
53 #define DOS_FS_TYPE_OFFSET 0x36
54 #define DOS_FS32_TYPE_OFFSET 0x52
56 static int disk_read(__u32 block
, __u32 nr_blocks
, void *buf
)
58 if (!cur_dev
|| !cur_dev
->block_read
)
61 return cur_dev
->block_read(cur_dev
->dev
,
62 cur_part_info
.start
+ block
, nr_blocks
, buf
);
65 int fat_register_device(block_dev_desc_t
* dev_desc
, int part_no
)
67 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
69 /* First close any currently found FAT filesystem */
72 #if (defined(CONFIG_CMD_IDE) || \
73 defined(CONFIG_CMD_SATA) || \
74 defined(CONFIG_CMD_SCSI) || \
75 defined(CONFIG_CMD_USB) || \
76 defined(CONFIG_MMC) || \
77 defined(CONFIG_SYSTEMACE) )
79 /* Read the partition table, if present */
80 if (!get_partition_info(dev_desc
, part_no
, &cur_part_info
)) {
82 cur_part_nr
= part_no
;
86 /* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
89 printf("** Partition %d not valid on device %d **\n",
90 part_no
, dev_desc
->dev
);
96 cur_part_info
.start
= 0;
97 cur_part_info
.size
= dev_desc
->lba
;
98 cur_part_info
.blksz
= dev_desc
->blksz
;
99 memset(cur_part_info
.name
, 0, sizeof(cur_part_info
.name
));
100 memset(cur_part_info
.type
, 0, sizeof(cur_part_info
.type
));
103 /* Make sure it has a valid FAT header */
104 if (disk_read(0, 1, buffer
) != 1) {
109 /* Check if it's actually a DOS volume */
110 if (memcmp(buffer
+ DOS_BOOT_MAGIC_OFFSET
, "\x55\xAA", 2)) {
115 /* Check for FAT12/FAT16/FAT32 filesystem */
116 if (!memcmp(buffer
+ DOS_FS_TYPE_OFFSET
, "FAT", 3))
118 if (!memcmp(buffer
+ DOS_FS32_TYPE_OFFSET
, "FAT32", 5))
127 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
128 * Return index into string if found, -1 otherwise.
130 static int dirdelim(char *str
)
134 while (*str
!= '\0') {
135 if (ISDIRDELIM(*str
))
143 * Extract zero terminated short name from a directory entry.
145 static void get_name(dir_entry
*dirent
, char *s_name
)
149 memcpy(s_name
, dirent
->name
, 8);
152 while (*ptr
&& *ptr
!= ' ')
154 if (dirent
->ext
[0] && dirent
->ext
[0] != ' ') {
157 memcpy(ptr
, dirent
->ext
, 3);
159 while (*ptr
&& *ptr
!= ' ')
163 if (*s_name
== DELETED_FLAG
)
165 else if (*s_name
== aRING
)
166 *s_name
= DELETED_FLAG
;
171 * Get the entry at index 'entry' in a FAT (12/16/32) table.
172 * On failure 0x00 is returned.
174 static __u32
get_fatent(fsdata
*mydata
, __u32 entry
)
181 switch (mydata
->fatsize
) {
183 bufnum
= entry
/ FAT32BUFSIZE
;
184 offset
= entry
- bufnum
* FAT32BUFSIZE
;
187 bufnum
= entry
/ FAT16BUFSIZE
;
188 offset
= entry
- bufnum
* FAT16BUFSIZE
;
191 bufnum
= entry
/ FAT12BUFSIZE
;
192 offset
= entry
- bufnum
* FAT12BUFSIZE
;
196 /* Unsupported FAT size */
200 debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
201 mydata
->fatsize
, entry
, entry
, offset
, offset
);
203 /* Read a new block of FAT entries into the cache. */
204 if (bufnum
!= mydata
->fatbufnum
) {
205 __u32 getsize
= FATBUFBLOCKS
;
206 __u8
*bufptr
= mydata
->fatbuf
;
207 __u32 fatlength
= mydata
->fatlength
;
208 __u32 startblock
= bufnum
* FATBUFBLOCKS
;
210 if (startblock
+ getsize
> fatlength
)
211 getsize
= fatlength
- startblock
;
213 startblock
+= mydata
->fat_sect
; /* Offset from start of disk */
215 if (disk_read(startblock
, getsize
, bufptr
) < 0) {
216 debug("Error reading FAT blocks\n");
219 mydata
->fatbufnum
= bufnum
;
222 /* Get the actual entry from the table */
223 switch (mydata
->fatsize
) {
225 ret
= FAT2CPU32(((__u32
*) mydata
->fatbuf
)[offset
]);
228 ret
= FAT2CPU16(((__u16
*) mydata
->fatbuf
)[offset
]);
231 off16
= (offset
* 3) / 4;
233 switch (offset
& 0x3) {
235 ret
= FAT2CPU16(((__u16
*) mydata
->fatbuf
)[off16
]);
239 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
241 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+ 1]);
243 ret
= (val2
<< 4) | (val1
>> 12);
246 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
248 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+ 1]);
250 ret
= (val2
<< 8) | (val1
>> 8);
253 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
254 ret
= (ret
& 0xfff0) >> 4;
261 debug("FAT%d: ret: %08x, offset: %04x\n",
262 mydata
->fatsize
, ret
, offset
);
268 * Read at most 'size' bytes from the specified cluster into 'buffer'.
269 * Return 0 on success, -1 otherwise.
272 get_cluster(fsdata
*mydata
, __u32 clustnum
, __u8
*buffer
, unsigned long size
)
279 startsect
= mydata
->data_begin
+
280 clustnum
* mydata
->clust_size
;
282 startsect
= mydata
->rootdir_sect
;
285 debug("gc - clustnum: %d, startsect: %d\n", clustnum
, startsect
);
287 if ((unsigned long)buffer
& (ARCH_DMA_MINALIGN
- 1)) {
288 ALLOC_CACHE_ALIGN_BUFFER(__u8
, tmpbuf
, mydata
->sect_size
);
290 printf("FAT: Misaligned buffer address (%p)\n", buffer
);
292 while (size
>= mydata
->sect_size
) {
293 ret
= disk_read(startsect
++, 1, tmpbuf
);
295 debug("Error reading data (got %d)\n", ret
);
299 memcpy(buffer
, tmpbuf
, mydata
->sect_size
);
300 buffer
+= mydata
->sect_size
;
301 size
-= mydata
->sect_size
;
304 idx
= size
/ mydata
->sect_size
;
305 ret
= disk_read(startsect
, idx
, buffer
);
307 debug("Error reading data (got %d)\n", ret
);
311 idx
*= mydata
->sect_size
;
316 ALLOC_CACHE_ALIGN_BUFFER(__u8
, tmpbuf
, mydata
->sect_size
);
318 ret
= disk_read(startsect
, 1, tmpbuf
);
320 debug("Error reading data (got %d)\n", ret
);
324 memcpy(buffer
, tmpbuf
, size
);
331 * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
333 * Return the number of bytes read or -1 on fatal errors.
335 __u8 get_contents_vfatname_block
[MAX_CLUSTSIZE
]
336 __aligned(ARCH_DMA_MINALIGN
);
339 get_contents(fsdata
*mydata
, dir_entry
*dentptr
, unsigned long pos
,
340 __u8
*buffer
, unsigned long maxsize
)
342 unsigned long filesize
= FAT2CPU32(dentptr
->size
), gotsize
= 0;
343 unsigned int bytesperclust
= mydata
->clust_size
* mydata
->sect_size
;
344 __u32 curclust
= START(dentptr
);
345 __u32 endclust
, newclust
;
346 unsigned long actsize
;
348 debug("Filesize: %ld bytes\n", filesize
);
350 if (pos
>= filesize
) {
351 debug("Read position past EOF: %lu\n", pos
);
355 if (maxsize
> 0 && filesize
> pos
+ maxsize
)
356 filesize
= pos
+ maxsize
;
358 debug("%ld bytes\n", filesize
);
360 actsize
= bytesperclust
;
362 /* go to cluster at pos */
363 while (actsize
<= pos
) {
364 curclust
= get_fatent(mydata
, curclust
);
365 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
366 debug("curclust: 0x%x\n", curclust
);
367 debug("Invalid FAT entry\n");
370 actsize
+= bytesperclust
;
374 actsize
-= bytesperclust
;
378 /* align to beginning of next cluster if any */
380 actsize
= min(filesize
, bytesperclust
);
381 if (get_cluster(mydata
, curclust
, get_contents_vfatname_block
,
382 (int)actsize
) != 0) {
383 printf("Error reading cluster\n");
388 memcpy(buffer
, get_contents_vfatname_block
+ pos
, actsize
);
394 curclust
= get_fatent(mydata
, curclust
);
395 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
396 debug("curclust: 0x%x\n", curclust
);
397 debug("Invalid FAT entry\n");
402 actsize
= bytesperclust
;
406 /* search for consecutive clusters */
407 while (actsize
< filesize
) {
408 newclust
= get_fatent(mydata
, endclust
);
409 if ((newclust
- 1) != endclust
)
411 if (CHECK_CLUST(newclust
, mydata
->fatsize
)) {
412 debug("curclust: 0x%x\n", newclust
);
413 debug("Invalid FAT entry\n");
417 actsize
+= bytesperclust
;
420 /* get remaining bytes */
422 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
423 printf("Error reading cluster\n");
429 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
430 printf("Error reading cluster\n");
433 gotsize
+= (int)actsize
;
437 curclust
= get_fatent(mydata
, endclust
);
438 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
439 debug("curclust: 0x%x\n", curclust
);
440 printf("Invalid FAT entry\n");
443 actsize
= bytesperclust
;
448 #ifdef CONFIG_SUPPORT_VFAT
450 * Extract the file name information from 'slotptr' into 'l_name',
451 * starting at l_name[*idx].
452 * Return 1 if terminator (zero byte) is found, 0 otherwise.
454 static int slot2str(dir_slot
*slotptr
, char *l_name
, int *idx
)
458 for (j
= 0; j
<= 8; j
+= 2) {
459 l_name
[*idx
] = slotptr
->name0_4
[j
];
460 if (l_name
[*idx
] == 0x00)
464 for (j
= 0; j
<= 10; j
+= 2) {
465 l_name
[*idx
] = slotptr
->name5_10
[j
];
466 if (l_name
[*idx
] == 0x00)
470 for (j
= 0; j
<= 2; j
+= 2) {
471 l_name
[*idx
] = slotptr
->name11_12
[j
];
472 if (l_name
[*idx
] == 0x00)
481 * Extract the full long filename starting at 'retdent' (which is really
482 * a slot) into 'l_name'. If successful also copy the real directory entry
484 * Return 0 on success, -1 otherwise.
487 get_vfatname(fsdata
*mydata
, int curclust
, __u8
*cluster
,
488 dir_entry
*retdent
, char *l_name
)
491 dir_slot
*slotptr
= (dir_slot
*)retdent
;
492 __u8
*buflimit
= cluster
+ mydata
->sect_size
* ((curclust
== 0) ?
495 __u8 counter
= (slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff;
498 if (counter
> VFAT_MAXSEQ
) {
499 debug("Error: VFAT name is too long\n");
503 while ((__u8
*)slotptr
< buflimit
) {
506 if (((slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff) != counter
)
512 if ((__u8
*)slotptr
>= buflimit
) {
517 curclust
= get_fatent(mydata
, curclust
);
518 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
519 debug("curclust: 0x%x\n", curclust
);
520 printf("Invalid FAT entry\n");
524 if (get_cluster(mydata
, curclust
, get_contents_vfatname_block
,
525 mydata
->clust_size
* mydata
->sect_size
) != 0) {
526 debug("Error: reading directory block\n");
530 slotptr2
= (dir_slot
*)get_contents_vfatname_block
;
531 while (counter
> 0) {
532 if (((slotptr2
->id
& ~LAST_LONG_ENTRY_MASK
)
539 /* Save the real directory entry */
540 realdent
= (dir_entry
*)slotptr2
;
541 while ((__u8
*)slotptr2
> get_contents_vfatname_block
) {
543 slot2str(slotptr2
, l_name
, &idx
);
546 /* Save the real directory entry */
547 realdent
= (dir_entry
*)slotptr
;
552 if (slot2str(slotptr
, l_name
, &idx
))
554 } while (!(slotptr
->id
& LAST_LONG_ENTRY_MASK
));
557 if (*l_name
== DELETED_FLAG
)
559 else if (*l_name
== aRING
)
560 *l_name
= DELETED_FLAG
;
563 /* Return the real directory entry */
564 memcpy(retdent
, realdent
, sizeof(dir_entry
));
569 /* Calculate short name checksum */
570 static __u8
mkcksum(const char *str
)
576 for (i
= 0; i
< 11; i
++) {
577 ret
= (((ret
& 1) << 7) | ((ret
& 0xfe) >> 1)) + str
[i
];
582 #endif /* CONFIG_SUPPORT_VFAT */
585 * Get the directory entry associated with 'filename' from the directory
586 * starting at 'startsect'
588 __u8 get_dentfromdir_block
[MAX_CLUSTSIZE
]
589 __aligned(ARCH_DMA_MINALIGN
);
591 static dir_entry
*get_dentfromdir(fsdata
*mydata
, int startsect
,
592 char *filename
, dir_entry
*retdent
,
595 __u16 prevcksum
= 0xffff;
596 __u32 curclust
= START(retdent
);
597 int files
= 0, dirs
= 0;
599 debug("get_dentfromdir: %s\n", filename
);
606 if (get_cluster(mydata
, curclust
, get_dentfromdir_block
,
607 mydata
->clust_size
* mydata
->sect_size
) != 0) {
608 debug("Error: reading directory block\n");
612 dentptr
= (dir_entry
*)get_dentfromdir_block
;
614 for (i
= 0; i
< DIRENTSPERCLUST
; i
++) {
615 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
618 if (dentptr
->name
[0] == DELETED_FLAG
) {
622 if ((dentptr
->attr
& ATTR_VOLUME
)) {
623 #ifdef CONFIG_SUPPORT_VFAT
624 if ((dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
625 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
626 prevcksum
= ((dir_slot
*)dentptr
)->alias_checksum
;
627 get_vfatname(mydata
, curclust
,
628 get_dentfromdir_block
,
635 isdir
= (dentptr
->attr
& ATTR_DIR
);
643 if (l_name
[0] != 0) {
650 printf(" %8ld %s%c\n",
651 (long)FAT2CPU32(dentptr
->size
),
663 debug("vfatname: |%s|\n", l_name
);
667 /* Volume label or VFAT entry */
672 if (dentptr
->name
[0] == 0) {
674 printf("\n%d file(s), %d dir(s)\n\n",
677 debug("Dentname == NULL - %d\n", i
);
680 #ifdef CONFIG_SUPPORT_VFAT
681 if (dols
&& mkcksum(dentptr
->name
) == prevcksum
) {
687 get_name(dentptr
, s_name
);
689 int isdir
= (dentptr
->attr
& ATTR_DIR
);
699 if (s_name
[0] != 0) {
707 printf(" %8ld %s%c\n",
708 (long)FAT2CPU32(dentptr
->size
),
720 if (strcmp(filename
, s_name
)
721 && strcmp(filename
, l_name
)) {
722 debug("Mismatch: |%s|%s|\n", s_name
, l_name
);
727 memcpy(retdent
, dentptr
, sizeof(dir_entry
));
729 debug("DentName: %s", s_name
);
730 debug(", start: 0x%x", START(dentptr
));
731 debug(", size: 0x%x %s\n",
732 FAT2CPU32(dentptr
->size
),
733 (dentptr
->attr
& ATTR_DIR
) ? "(DIR)" : "");
738 curclust
= get_fatent(mydata
, curclust
);
739 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
740 debug("curclust: 0x%x\n", curclust
);
741 printf("Invalid FAT entry\n");
750 * Read boot sector and volume info from a FAT filesystem
753 read_bootsectandvi(boot_sector
*bs
, volume_info
*volinfo
, int *fatsize
)
756 volume_info
*vistart
;
759 if (cur_dev
== NULL
) {
760 debug("Error: no device selected\n");
764 block
= memalign(ARCH_DMA_MINALIGN
, cur_dev
->blksz
);
766 debug("Error: allocating block\n");
770 if (disk_read(0, 1, block
) < 0) {
771 debug("Error: reading block\n");
775 memcpy(bs
, block
, sizeof(boot_sector
));
776 bs
->reserved
= FAT2CPU16(bs
->reserved
);
777 bs
->fat_length
= FAT2CPU16(bs
->fat_length
);
778 bs
->secs_track
= FAT2CPU16(bs
->secs_track
);
779 bs
->heads
= FAT2CPU16(bs
->heads
);
780 bs
->total_sect
= FAT2CPU32(bs
->total_sect
);
783 if (bs
->fat_length
== 0) {
785 bs
->fat32_length
= FAT2CPU32(bs
->fat32_length
);
786 bs
->flags
= FAT2CPU16(bs
->flags
);
787 bs
->root_cluster
= FAT2CPU32(bs
->root_cluster
);
788 bs
->info_sector
= FAT2CPU16(bs
->info_sector
);
789 bs
->backup_boot
= FAT2CPU16(bs
->backup_boot
);
790 vistart
= (volume_info
*)(block
+ sizeof(boot_sector
));
793 vistart
= (volume_info
*)&(bs
->fat32_length
);
796 memcpy(volinfo
, vistart
, sizeof(volume_info
));
798 if (*fatsize
== 32) {
799 if (strncmp(FAT32_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0)
802 if (strncmp(FAT12_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
806 if (strncmp(FAT16_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
812 debug("Error: broken fs_type sign\n");
820 __u8 do_fat_read_at_block
[MAX_CLUSTSIZE
]
821 __aligned(ARCH_DMA_MINALIGN
);
824 do_fat_read_at(const char *filename
, unsigned long pos
, void *buffer
,
825 unsigned long maxsize
, int dols
)
827 char fnamecopy
[2048];
831 fsdata
*mydata
= &datablock
;
832 dir_entry
*dentptr
= NULL
;
833 __u16 prevcksum
= 0xffff;
837 int files
= 0, dirs
= 0;
840 __u32 root_cluster
= 0;
841 int rootdir_size
= 0;
844 if (read_bootsectandvi(&bs
, &volinfo
, &mydata
->fatsize
)) {
845 debug("Error: reading boot sector\n");
849 if (mydata
->fatsize
== 32) {
850 root_cluster
= bs
.root_cluster
;
851 mydata
->fatlength
= bs
.fat32_length
;
853 mydata
->fatlength
= bs
.fat_length
;
856 mydata
->fat_sect
= bs
.reserved
;
858 cursect
= mydata
->rootdir_sect
859 = mydata
->fat_sect
+ mydata
->fatlength
* bs
.fats
;
861 mydata
->sect_size
= (bs
.sector_size
[1] << 8) + bs
.sector_size
[0];
862 mydata
->clust_size
= bs
.cluster_size
;
863 if (mydata
->sect_size
!= cur_part_info
.blksz
) {
864 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
865 mydata
->sect_size
, cur_part_info
.blksz
);
869 if (mydata
->fatsize
== 32) {
870 mydata
->data_begin
= mydata
->rootdir_sect
-
871 (mydata
->clust_size
* 2);
873 rootdir_size
= ((bs
.dir_entries
[1] * (int)256 +
877 mydata
->data_begin
= mydata
->rootdir_sect
+
879 (mydata
->clust_size
* 2);
882 mydata
->fatbufnum
= -1;
883 mydata
->fatbuf
= memalign(ARCH_DMA_MINALIGN
, FATBUFSIZE
);
884 if (mydata
->fatbuf
== NULL
) {
885 debug("Error: allocating memory\n");
889 #ifdef CONFIG_SUPPORT_VFAT
890 debug("VFAT Support enabled\n");
892 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
893 mydata
->fatsize
, mydata
->fat_sect
, mydata
->fatlength
);
894 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
895 "Data begins at: %d\n",
897 mydata
->rootdir_sect
,
898 mydata
->rootdir_sect
* mydata
->sect_size
, mydata
->data_begin
);
899 debug("Sector size: %d, cluster size: %d\n", mydata
->sect_size
,
902 /* "cwd" is always the root... */
903 while (ISDIRDELIM(*filename
))
906 /* Make a copy of the filename and convert it to lowercase */
907 strcpy(fnamecopy
, filename
);
910 if (*fnamecopy
== '\0') {
915 } else if ((idx
= dirdelim(fnamecopy
)) >= 0) {
917 fnamecopy
[idx
] = '\0';
918 subname
= fnamecopy
+ idx
+ 1;
920 /* Handle multiple delimiters */
921 while (ISDIRDELIM(*subname
))
932 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
933 cursect
, mydata
->clust_size
, DIRENTSPERBLOCK
);
935 if (disk_read(cursect
,
936 (mydata
->fatsize
== 32) ?
937 (mydata
->clust_size
) :
939 do_fat_read_at_block
) < 0) {
940 debug("Error: reading rootdir block\n");
944 dentptr
= (dir_entry
*) do_fat_read_at_block
;
947 for (i
= 0; i
< DIRENTSPERBLOCK
; i
++) {
948 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
951 if (dentptr
->name
[0] == DELETED_FLAG
) {
955 if ((dentptr
->attr
& ATTR_VOLUME
)) {
956 #ifdef CONFIG_SUPPORT_VFAT
957 if ((dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
958 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
960 ((dir_slot
*)dentptr
)->alias_checksum
;
964 do_fat_read_at_block
,
967 if (dols
== LS_ROOT
) {
971 (dentptr
->attr
& ATTR_DIR
);
979 if (l_name
[0] != 0) {
986 printf(" %8ld %s%c\n",
987 (long)FAT2CPU32(dentptr
->size
),
999 debug("Rootvfatname: |%s|\n",
1004 /* Volume label or VFAT entry */
1008 } else if (dentptr
->name
[0] == 0) {
1009 debug("RootDentname == NULL - %d\n", i
);
1010 if (dols
== LS_ROOT
) {
1011 printf("\n%d file(s), %d dir(s)\n\n",
1017 #ifdef CONFIG_SUPPORT_VFAT
1018 else if (dols
== LS_ROOT
&&
1019 mkcksum(dentptr
->name
) == prevcksum
) {
1025 get_name(dentptr
, s_name
);
1027 if (dols
== LS_ROOT
) {
1028 int isdir
= (dentptr
->attr
& ATTR_DIR
);
1034 if (s_name
[0] != 0) {
1040 if (s_name
[0] != 0) {
1047 printf(" %8ld %s%c\n",
1048 (long)FAT2CPU32(dentptr
->size
),
1059 if (strcmp(fnamecopy
, s_name
)
1060 && strcmp(fnamecopy
, l_name
)) {
1061 debug("RootMismatch: |%s|%s|\n", s_name
,
1067 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
1070 debug("RootName: %s", s_name
);
1071 debug(", start: 0x%x", START(dentptr
));
1072 debug(", size: 0x%x %s\n",
1073 FAT2CPU32(dentptr
->size
),
1074 isdir
? "(DIR)" : "");
1076 goto rootdir_done
; /* We got a match */
1078 debug("END LOOP: j=%d clust_size=%d\n", j
,
1079 mydata
->clust_size
);
1082 * On FAT32 we must fetch the FAT entries for the next
1083 * root directory clusters when a cluster has been
1084 * completely processed.
1087 int rootdir_end
= 0;
1088 if (mydata
->fatsize
== 32) {
1089 if (j
== mydata
->clust_size
) {
1093 nxt_clust
= get_fatent(mydata
, root_cluster
);
1094 rootdir_end
= CHECK_CLUST(nxt_clust
, 32);
1096 nxtsect
= mydata
->data_begin
+
1097 (nxt_clust
* mydata
->clust_size
);
1099 root_cluster
= nxt_clust
;
1105 if (j
== PREFETCH_BLOCKS
)
1108 rootdir_end
= (++cursect
- mydata
->rootdir_sect
>=
1112 /* If end of rootdir reached */
1114 if (dols
== LS_ROOT
) {
1115 printf("\n%d file(s), %d dir(s)\n\n",
1127 int startsect
= mydata
->data_begin
1128 + START(dentptr
) * mydata
->clust_size
;
1130 char *nextname
= NULL
;
1135 idx
= dirdelim(subname
);
1138 subname
[idx
] = '\0';
1139 nextname
= subname
+ idx
+ 1;
1140 /* Handle multiple delimiters */
1141 while (ISDIRDELIM(*nextname
))
1143 if (dols
&& *nextname
== '\0')
1146 if (dols
&& firsttime
) {
1153 if (get_dentfromdir(mydata
, startsect
, subname
, dentptr
,
1154 isdir
? 0 : dols
) == NULL
) {
1160 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
1167 ret
= get_contents(mydata
, dentptr
, pos
, buffer
, maxsize
);
1168 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr
->size
), ret
);
1171 free(mydata
->fatbuf
);
1176 do_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
, int dols
)
1178 return do_fat_read_at(filename
, 0, buffer
, maxsize
, dols
);
1181 int file_fat_detectfs(void)
1184 volume_info volinfo
;
1188 if (cur_dev
== NULL
) {
1189 printf("No current device\n");
1193 #if defined(CONFIG_CMD_IDE) || \
1194 defined(CONFIG_CMD_SATA) || \
1195 defined(CONFIG_CMD_SCSI) || \
1196 defined(CONFIG_CMD_USB) || \
1198 printf("Interface: ");
1199 switch (cur_dev
->if_type
) {
1225 printf("\n Device %d: ", cur_dev
->dev
);
1229 if (read_bootsectandvi(&bs
, &volinfo
, &fatsize
)) {
1230 printf("\nNo valid FAT fs found\n");
1234 memcpy(vol_label
, volinfo
.volume_label
, 11);
1235 vol_label
[11] = '\0';
1236 volinfo
.fs_type
[5] = '\0';
1238 printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr
,
1239 volinfo
.fs_type
, vol_label
);
1244 int file_fat_ls(const char *dir
)
1246 return do_fat_read(dir
, NULL
, 0, LS_YES
);
1249 long file_fat_read_at(const char *filename
, unsigned long pos
, void *buffer
,
1250 unsigned long maxsize
)
1252 printf("reading %s\n", filename
);
1253 return do_fat_read_at(filename
, pos
, buffer
, maxsize
, LS_NO
);
1256 long file_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
)
1258 return file_fat_read_at(filename
, 0, buffer
, maxsize
);