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 the file associated with 'dentptr'
333 * Return the number of bytes read or -1 on fatal errors.
336 get_contents(fsdata
*mydata
, dir_entry
*dentptr
, __u8
*buffer
,
337 unsigned long maxsize
)
339 unsigned long filesize
= FAT2CPU32(dentptr
->size
), gotsize
= 0;
340 unsigned int bytesperclust
= mydata
->clust_size
* mydata
->sect_size
;
341 __u32 curclust
= START(dentptr
);
342 __u32 endclust
, newclust
;
343 unsigned long actsize
;
345 debug("Filesize: %ld bytes\n", filesize
);
347 if (maxsize
> 0 && filesize
> maxsize
)
350 debug("%ld bytes\n", filesize
);
352 actsize
= bytesperclust
;
356 /* search for consecutive clusters */
357 while (actsize
< filesize
) {
358 newclust
= get_fatent(mydata
, endclust
);
359 if ((newclust
- 1) != endclust
)
361 if (CHECK_CLUST(newclust
, mydata
->fatsize
)) {
362 debug("curclust: 0x%x\n", newclust
);
363 debug("Invalid FAT entry\n");
367 actsize
+= bytesperclust
;
370 /* get remaining bytes */
372 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
373 printf("Error reading cluster\n");
379 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
380 printf("Error reading cluster\n");
383 gotsize
+= (int)actsize
;
387 curclust
= get_fatent(mydata
, endclust
);
388 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
389 debug("curclust: 0x%x\n", curclust
);
390 printf("Invalid FAT entry\n");
393 actsize
= bytesperclust
;
398 #ifdef CONFIG_SUPPORT_VFAT
400 * Extract the file name information from 'slotptr' into 'l_name',
401 * starting at l_name[*idx].
402 * Return 1 if terminator (zero byte) is found, 0 otherwise.
404 static int slot2str(dir_slot
*slotptr
, char *l_name
, int *idx
)
408 for (j
= 0; j
<= 8; j
+= 2) {
409 l_name
[*idx
] = slotptr
->name0_4
[j
];
410 if (l_name
[*idx
] == 0x00)
414 for (j
= 0; j
<= 10; j
+= 2) {
415 l_name
[*idx
] = slotptr
->name5_10
[j
];
416 if (l_name
[*idx
] == 0x00)
420 for (j
= 0; j
<= 2; j
+= 2) {
421 l_name
[*idx
] = slotptr
->name11_12
[j
];
422 if (l_name
[*idx
] == 0x00)
431 * Extract the full long filename starting at 'retdent' (which is really
432 * a slot) into 'l_name'. If successful also copy the real directory entry
434 * Return 0 on success, -1 otherwise.
436 __u8 get_vfatname_block
[MAX_CLUSTSIZE
]
437 __aligned(ARCH_DMA_MINALIGN
);
440 get_vfatname(fsdata
*mydata
, int curclust
, __u8
*cluster
,
441 dir_entry
*retdent
, char *l_name
)
444 dir_slot
*slotptr
= (dir_slot
*)retdent
;
445 __u8
*buflimit
= cluster
+ mydata
->sect_size
* ((curclust
== 0) ?
448 __u8 counter
= (slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff;
451 if (counter
> VFAT_MAXSEQ
) {
452 debug("Error: VFAT name is too long\n");
456 while ((__u8
*)slotptr
< buflimit
) {
459 if (((slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff) != counter
)
465 if ((__u8
*)slotptr
>= buflimit
) {
470 curclust
= get_fatent(mydata
, curclust
);
471 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
472 debug("curclust: 0x%x\n", curclust
);
473 printf("Invalid FAT entry\n");
477 if (get_cluster(mydata
, curclust
, get_vfatname_block
,
478 mydata
->clust_size
* mydata
->sect_size
) != 0) {
479 debug("Error: reading directory block\n");
483 slotptr2
= (dir_slot
*)get_vfatname_block
;
484 while (counter
> 0) {
485 if (((slotptr2
->id
& ~LAST_LONG_ENTRY_MASK
)
492 /* Save the real directory entry */
493 realdent
= (dir_entry
*)slotptr2
;
494 while ((__u8
*)slotptr2
> get_vfatname_block
) {
496 slot2str(slotptr2
, l_name
, &idx
);
499 /* Save the real directory entry */
500 realdent
= (dir_entry
*)slotptr
;
505 if (slot2str(slotptr
, l_name
, &idx
))
507 } while (!(slotptr
->id
& LAST_LONG_ENTRY_MASK
));
510 if (*l_name
== DELETED_FLAG
)
512 else if (*l_name
== aRING
)
513 *l_name
= DELETED_FLAG
;
516 /* Return the real directory entry */
517 memcpy(retdent
, realdent
, sizeof(dir_entry
));
522 /* Calculate short name checksum */
523 static __u8
mkcksum(const char *str
)
529 for (i
= 0; i
< 11; i
++) {
530 ret
= (((ret
& 1) << 7) | ((ret
& 0xfe) >> 1)) + str
[i
];
535 #endif /* CONFIG_SUPPORT_VFAT */
538 * Get the directory entry associated with 'filename' from the directory
539 * starting at 'startsect'
541 __u8 get_dentfromdir_block
[MAX_CLUSTSIZE
]
542 __aligned(ARCH_DMA_MINALIGN
);
544 static dir_entry
*get_dentfromdir(fsdata
*mydata
, int startsect
,
545 char *filename
, dir_entry
*retdent
,
548 __u16 prevcksum
= 0xffff;
549 __u32 curclust
= START(retdent
);
550 int files
= 0, dirs
= 0;
552 debug("get_dentfromdir: %s\n", filename
);
559 if (get_cluster(mydata
, curclust
, get_dentfromdir_block
,
560 mydata
->clust_size
* mydata
->sect_size
) != 0) {
561 debug("Error: reading directory block\n");
565 dentptr
= (dir_entry
*)get_dentfromdir_block
;
567 for (i
= 0; i
< DIRENTSPERCLUST
; i
++) {
568 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
571 if (dentptr
->name
[0] == DELETED_FLAG
) {
575 if ((dentptr
->attr
& ATTR_VOLUME
)) {
576 #ifdef CONFIG_SUPPORT_VFAT
577 if ((dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
578 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
579 prevcksum
= ((dir_slot
*)dentptr
)->alias_checksum
;
580 get_vfatname(mydata
, curclust
,
581 get_dentfromdir_block
,
588 isdir
= (dentptr
->attr
& ATTR_DIR
);
596 if (l_name
[0] != 0) {
603 printf(" %8ld %s%c\n",
604 (long)FAT2CPU32(dentptr
->size
),
616 debug("vfatname: |%s|\n", l_name
);
620 /* Volume label or VFAT entry */
625 if (dentptr
->name
[0] == 0) {
627 printf("\n%d file(s), %d dir(s)\n\n",
630 debug("Dentname == NULL - %d\n", i
);
633 #ifdef CONFIG_SUPPORT_VFAT
634 if (dols
&& mkcksum(dentptr
->name
) == prevcksum
) {
640 get_name(dentptr
, s_name
);
642 int isdir
= (dentptr
->attr
& ATTR_DIR
);
652 if (s_name
[0] != 0) {
660 printf(" %8ld %s%c\n",
661 (long)FAT2CPU32(dentptr
->size
),
673 if (strcmp(filename
, s_name
)
674 && strcmp(filename
, l_name
)) {
675 debug("Mismatch: |%s|%s|\n", s_name
, l_name
);
680 memcpy(retdent
, dentptr
, sizeof(dir_entry
));
682 debug("DentName: %s", s_name
);
683 debug(", start: 0x%x", START(dentptr
));
684 debug(", size: 0x%x %s\n",
685 FAT2CPU32(dentptr
->size
),
686 (dentptr
->attr
& ATTR_DIR
) ? "(DIR)" : "");
691 curclust
= get_fatent(mydata
, curclust
);
692 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
693 debug("curclust: 0x%x\n", curclust
);
694 printf("Invalid FAT entry\n");
703 * Read boot sector and volume info from a FAT filesystem
706 read_bootsectandvi(boot_sector
*bs
, volume_info
*volinfo
, int *fatsize
)
709 volume_info
*vistart
;
712 if (cur_dev
== NULL
) {
713 debug("Error: no device selected\n");
717 block
= memalign(ARCH_DMA_MINALIGN
, cur_dev
->blksz
);
719 debug("Error: allocating block\n");
723 if (disk_read(0, 1, block
) < 0) {
724 debug("Error: reading block\n");
728 memcpy(bs
, block
, sizeof(boot_sector
));
729 bs
->reserved
= FAT2CPU16(bs
->reserved
);
730 bs
->fat_length
= FAT2CPU16(bs
->fat_length
);
731 bs
->secs_track
= FAT2CPU16(bs
->secs_track
);
732 bs
->heads
= FAT2CPU16(bs
->heads
);
733 bs
->total_sect
= FAT2CPU32(bs
->total_sect
);
736 if (bs
->fat_length
== 0) {
738 bs
->fat32_length
= FAT2CPU32(bs
->fat32_length
);
739 bs
->flags
= FAT2CPU16(bs
->flags
);
740 bs
->root_cluster
= FAT2CPU32(bs
->root_cluster
);
741 bs
->info_sector
= FAT2CPU16(bs
->info_sector
);
742 bs
->backup_boot
= FAT2CPU16(bs
->backup_boot
);
743 vistart
= (volume_info
*)(block
+ sizeof(boot_sector
));
746 vistart
= (volume_info
*)&(bs
->fat32_length
);
749 memcpy(volinfo
, vistart
, sizeof(volume_info
));
751 if (*fatsize
== 32) {
752 if (strncmp(FAT32_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0)
755 if (strncmp(FAT12_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
759 if (strncmp(FAT16_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
765 debug("Error: broken fs_type sign\n");
773 __u8 do_fat_read_block
[MAX_CLUSTSIZE
]
774 __aligned(ARCH_DMA_MINALIGN
);
777 do_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
, int dols
)
779 char fnamecopy
[2048];
783 fsdata
*mydata
= &datablock
;
784 dir_entry
*dentptr
= NULL
;
785 __u16 prevcksum
= 0xffff;
789 int files
= 0, dirs
= 0;
792 __u32 root_cluster
= 0;
793 int rootdir_size
= 0;
796 if (read_bootsectandvi(&bs
, &volinfo
, &mydata
->fatsize
)) {
797 debug("Error: reading boot sector\n");
801 if (mydata
->fatsize
== 32) {
802 root_cluster
= bs
.root_cluster
;
803 mydata
->fatlength
= bs
.fat32_length
;
805 mydata
->fatlength
= bs
.fat_length
;
808 mydata
->fat_sect
= bs
.reserved
;
810 cursect
= mydata
->rootdir_sect
811 = mydata
->fat_sect
+ mydata
->fatlength
* bs
.fats
;
813 mydata
->sect_size
= (bs
.sector_size
[1] << 8) + bs
.sector_size
[0];
814 mydata
->clust_size
= bs
.cluster_size
;
815 if (mydata
->sect_size
!= cur_part_info
.blksz
) {
816 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
817 mydata
->sect_size
, cur_part_info
.blksz
);
821 if (mydata
->fatsize
== 32) {
822 mydata
->data_begin
= mydata
->rootdir_sect
-
823 (mydata
->clust_size
* 2);
825 rootdir_size
= ((bs
.dir_entries
[1] * (int)256 +
829 mydata
->data_begin
= mydata
->rootdir_sect
+
831 (mydata
->clust_size
* 2);
834 mydata
->fatbufnum
= -1;
835 mydata
->fatbuf
= memalign(ARCH_DMA_MINALIGN
, FATBUFSIZE
);
836 if (mydata
->fatbuf
== NULL
) {
837 debug("Error: allocating memory\n");
841 #ifdef CONFIG_SUPPORT_VFAT
842 debug("VFAT Support enabled\n");
844 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
845 mydata
->fatsize
, mydata
->fat_sect
, mydata
->fatlength
);
846 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
847 "Data begins at: %d\n",
849 mydata
->rootdir_sect
,
850 mydata
->rootdir_sect
* mydata
->sect_size
, mydata
->data_begin
);
851 debug("Sector size: %d, cluster size: %d\n", mydata
->sect_size
,
854 /* "cwd" is always the root... */
855 while (ISDIRDELIM(*filename
))
858 /* Make a copy of the filename and convert it to lowercase */
859 strcpy(fnamecopy
, filename
);
862 if (*fnamecopy
== '\0') {
867 } else if ((idx
= dirdelim(fnamecopy
)) >= 0) {
869 fnamecopy
[idx
] = '\0';
870 subname
= fnamecopy
+ idx
+ 1;
872 /* Handle multiple delimiters */
873 while (ISDIRDELIM(*subname
))
884 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
885 cursect
, mydata
->clust_size
, DIRENTSPERBLOCK
);
887 if (disk_read(cursect
,
888 (mydata
->fatsize
== 32) ?
889 (mydata
->clust_size
) :
891 do_fat_read_block
) < 0) {
892 debug("Error: reading rootdir block\n");
896 dentptr
= (dir_entry
*) do_fat_read_block
;
899 for (i
= 0; i
< DIRENTSPERBLOCK
; i
++) {
900 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
903 if (dentptr
->name
[0] == DELETED_FLAG
) {
907 if ((dentptr
->attr
& ATTR_VOLUME
)) {
908 #ifdef CONFIG_SUPPORT_VFAT
909 if ((dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
910 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
912 ((dir_slot
*)dentptr
)->alias_checksum
;
919 if (dols
== LS_ROOT
) {
923 (dentptr
->attr
& ATTR_DIR
);
931 if (l_name
[0] != 0) {
938 printf(" %8ld %s%c\n",
939 (long)FAT2CPU32(dentptr
->size
),
951 debug("Rootvfatname: |%s|\n",
956 /* Volume label or VFAT entry */
960 } else if (dentptr
->name
[0] == 0) {
961 debug("RootDentname == NULL - %d\n", i
);
962 if (dols
== LS_ROOT
) {
963 printf("\n%d file(s), %d dir(s)\n\n",
969 #ifdef CONFIG_SUPPORT_VFAT
970 else if (dols
== LS_ROOT
&&
971 mkcksum(dentptr
->name
) == prevcksum
) {
977 get_name(dentptr
, s_name
);
979 if (dols
== LS_ROOT
) {
980 int isdir
= (dentptr
->attr
& ATTR_DIR
);
986 if (s_name
[0] != 0) {
992 if (s_name
[0] != 0) {
999 printf(" %8ld %s%c\n",
1000 (long)FAT2CPU32(dentptr
->size
),
1011 if (strcmp(fnamecopy
, s_name
)
1012 && strcmp(fnamecopy
, l_name
)) {
1013 debug("RootMismatch: |%s|%s|\n", s_name
,
1019 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
1022 debug("RootName: %s", s_name
);
1023 debug(", start: 0x%x", START(dentptr
));
1024 debug(", size: 0x%x %s\n",
1025 FAT2CPU32(dentptr
->size
),
1026 isdir
? "(DIR)" : "");
1028 goto rootdir_done
; /* We got a match */
1030 debug("END LOOP: j=%d clust_size=%d\n", j
,
1031 mydata
->clust_size
);
1034 * On FAT32 we must fetch the FAT entries for the next
1035 * root directory clusters when a cluster has been
1036 * completely processed.
1039 int rootdir_end
= 0;
1040 if (mydata
->fatsize
== 32) {
1041 if (j
== mydata
->clust_size
) {
1045 nxt_clust
= get_fatent(mydata
, root_cluster
);
1046 rootdir_end
= CHECK_CLUST(nxt_clust
, 32);
1048 nxtsect
= mydata
->data_begin
+
1049 (nxt_clust
* mydata
->clust_size
);
1051 root_cluster
= nxt_clust
;
1057 if (j
== PREFETCH_BLOCKS
)
1060 rootdir_end
= (++cursect
- mydata
->rootdir_sect
>=
1064 /* If end of rootdir reached */
1066 if (dols
== LS_ROOT
) {
1067 printf("\n%d file(s), %d dir(s)\n\n",
1079 int startsect
= mydata
->data_begin
1080 + START(dentptr
) * mydata
->clust_size
;
1082 char *nextname
= NULL
;
1087 idx
= dirdelim(subname
);
1090 subname
[idx
] = '\0';
1091 nextname
= subname
+ idx
+ 1;
1092 /* Handle multiple delimiters */
1093 while (ISDIRDELIM(*nextname
))
1095 if (dols
&& *nextname
== '\0')
1098 if (dols
&& firsttime
) {
1105 if (get_dentfromdir(mydata
, startsect
, subname
, dentptr
,
1106 isdir
? 0 : dols
) == NULL
) {
1112 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
1119 ret
= get_contents(mydata
, dentptr
, buffer
, maxsize
);
1120 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr
->size
), ret
);
1123 free(mydata
->fatbuf
);
1127 int file_fat_detectfs(void)
1130 volume_info volinfo
;
1134 if (cur_dev
== NULL
) {
1135 printf("No current device\n");
1139 #if defined(CONFIG_CMD_IDE) || \
1140 defined(CONFIG_CMD_SATA) || \
1141 defined(CONFIG_CMD_SCSI) || \
1142 defined(CONFIG_CMD_USB) || \
1144 printf("Interface: ");
1145 switch (cur_dev
->if_type
) {
1171 printf("\n Device %d: ", cur_dev
->dev
);
1175 if (read_bootsectandvi(&bs
, &volinfo
, &fatsize
)) {
1176 printf("\nNo valid FAT fs found\n");
1180 memcpy(vol_label
, volinfo
.volume_label
, 11);
1181 vol_label
[11] = '\0';
1182 volinfo
.fs_type
[5] = '\0';
1184 printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr
,
1185 volinfo
.fs_type
, vol_label
);
1190 int file_fat_ls(const char *dir
)
1192 return do_fat_read(dir
, NULL
, 0, LS_YES
);
1195 long file_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
)
1197 printf("reading %s\n", filename
);
1198 return do_fat_read(filename
, buffer
, maxsize
, LS_NO
);