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 disk_partition_t cur_part_info
;
51 #define DOS_BOOT_MAGIC_OFFSET 0x1fe
52 #define DOS_FS_TYPE_OFFSET 0x36
53 #define DOS_FS32_TYPE_OFFSET 0x52
55 static int disk_read(__u32 block
, __u32 nr_blocks
, void *buf
)
57 if (!cur_dev
|| !cur_dev
->block_read
)
60 return cur_dev
->block_read(cur_dev
->dev
,
61 cur_part_info
.start
+ block
, nr_blocks
, buf
);
64 int fat_set_blk_dev(block_dev_desc_t
*dev_desc
, disk_partition_t
*info
)
66 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
69 cur_part_info
= *info
;
71 /* Make sure it has a valid FAT header */
72 if (disk_read(0, 1, buffer
) != 1) {
77 /* Check if it's actually a DOS volume */
78 if (memcmp(buffer
+ DOS_BOOT_MAGIC_OFFSET
, "\x55\xAA", 2)) {
83 /* Check for FAT12/FAT16/FAT32 filesystem */
84 if (!memcmp(buffer
+ DOS_FS_TYPE_OFFSET
, "FAT", 3))
86 if (!memcmp(buffer
+ DOS_FS32_TYPE_OFFSET
, "FAT32", 5))
93 int fat_register_device(block_dev_desc_t
*dev_desc
, int part_no
)
95 disk_partition_t info
;
97 /* First close any currently found FAT filesystem */
100 /* Read the partition table, if present */
101 if (get_partition_info(dev_desc
, part_no
, &info
)) {
103 printf("** Partition %d not valid on device %d **\n",
104 part_no
, dev_desc
->dev
);
109 info
.size
= dev_desc
->lba
;
110 info
.blksz
= dev_desc
->blksz
;
114 #ifdef CONFIG_PARTITION_UUIDS
119 return fat_set_blk_dev(dev_desc
, &info
);
123 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
124 * Return index into string if found, -1 otherwise.
126 static int dirdelim(char *str
)
130 while (*str
!= '\0') {
131 if (ISDIRDELIM(*str
))
139 * Extract zero terminated short name from a directory entry.
141 static void get_name(dir_entry
*dirent
, char *s_name
)
145 memcpy(s_name
, dirent
->name
, 8);
148 while (*ptr
&& *ptr
!= ' ')
150 if (dirent
->ext
[0] && dirent
->ext
[0] != ' ') {
153 memcpy(ptr
, dirent
->ext
, 3);
155 while (*ptr
&& *ptr
!= ' ')
159 if (*s_name
== DELETED_FLAG
)
161 else if (*s_name
== aRING
)
162 *s_name
= DELETED_FLAG
;
167 * Get the entry at index 'entry' in a FAT (12/16/32) table.
168 * On failure 0x00 is returned.
170 static __u32
get_fatent(fsdata
*mydata
, __u32 entry
)
177 switch (mydata
->fatsize
) {
179 bufnum
= entry
/ FAT32BUFSIZE
;
180 offset
= entry
- bufnum
* FAT32BUFSIZE
;
183 bufnum
= entry
/ FAT16BUFSIZE
;
184 offset
= entry
- bufnum
* FAT16BUFSIZE
;
187 bufnum
= entry
/ FAT12BUFSIZE
;
188 offset
= entry
- bufnum
* FAT12BUFSIZE
;
192 /* Unsupported FAT size */
196 debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
197 mydata
->fatsize
, entry
, entry
, offset
, offset
);
199 /* Read a new block of FAT entries into the cache. */
200 if (bufnum
!= mydata
->fatbufnum
) {
201 __u32 getsize
= FATBUFBLOCKS
;
202 __u8
*bufptr
= mydata
->fatbuf
;
203 __u32 fatlength
= mydata
->fatlength
;
204 __u32 startblock
= bufnum
* FATBUFBLOCKS
;
206 if (startblock
+ getsize
> fatlength
)
207 getsize
= fatlength
- startblock
;
209 startblock
+= mydata
->fat_sect
; /* Offset from start of disk */
211 if (disk_read(startblock
, getsize
, bufptr
) < 0) {
212 debug("Error reading FAT blocks\n");
215 mydata
->fatbufnum
= bufnum
;
218 /* Get the actual entry from the table */
219 switch (mydata
->fatsize
) {
221 ret
= FAT2CPU32(((__u32
*) mydata
->fatbuf
)[offset
]);
224 ret
= FAT2CPU16(((__u16
*) mydata
->fatbuf
)[offset
]);
227 off16
= (offset
* 3) / 4;
229 switch (offset
& 0x3) {
231 ret
= FAT2CPU16(((__u16
*) mydata
->fatbuf
)[off16
]);
235 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
237 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+ 1]);
239 ret
= (val2
<< 4) | (val1
>> 12);
242 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
244 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+ 1]);
246 ret
= (val2
<< 8) | (val1
>> 8);
249 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
250 ret
= (ret
& 0xfff0) >> 4;
257 debug("FAT%d: ret: %08x, offset: %04x\n",
258 mydata
->fatsize
, ret
, offset
);
264 * Read at most 'size' bytes from the specified cluster into 'buffer'.
265 * Return 0 on success, -1 otherwise.
268 get_cluster(fsdata
*mydata
, __u32 clustnum
, __u8
*buffer
, unsigned long size
)
275 startsect
= mydata
->data_begin
+
276 clustnum
* mydata
->clust_size
;
278 startsect
= mydata
->rootdir_sect
;
281 debug("gc - clustnum: %d, startsect: %d\n", clustnum
, startsect
);
283 if ((unsigned long)buffer
& (ARCH_DMA_MINALIGN
- 1)) {
284 ALLOC_CACHE_ALIGN_BUFFER(__u8
, tmpbuf
, mydata
->sect_size
);
286 printf("FAT: Misaligned buffer address (%p)\n", buffer
);
288 while (size
>= mydata
->sect_size
) {
289 ret
= disk_read(startsect
++, 1, tmpbuf
);
291 debug("Error reading data (got %d)\n", ret
);
295 memcpy(buffer
, tmpbuf
, mydata
->sect_size
);
296 buffer
+= mydata
->sect_size
;
297 size
-= mydata
->sect_size
;
300 idx
= size
/ mydata
->sect_size
;
301 ret
= disk_read(startsect
, idx
, buffer
);
303 debug("Error reading data (got %d)\n", ret
);
307 idx
*= mydata
->sect_size
;
312 ALLOC_CACHE_ALIGN_BUFFER(__u8
, tmpbuf
, mydata
->sect_size
);
314 ret
= disk_read(startsect
, 1, tmpbuf
);
316 debug("Error reading data (got %d)\n", ret
);
320 memcpy(buffer
, tmpbuf
, size
);
327 * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
329 * Return the number of bytes read or -1 on fatal errors.
331 __u8 get_contents_vfatname_block
[MAX_CLUSTSIZE
]
332 __aligned(ARCH_DMA_MINALIGN
);
335 get_contents(fsdata
*mydata
, dir_entry
*dentptr
, unsigned long pos
,
336 __u8
*buffer
, unsigned long maxsize
)
338 unsigned long filesize
= FAT2CPU32(dentptr
->size
), gotsize
= 0;
339 unsigned int bytesperclust
= mydata
->clust_size
* mydata
->sect_size
;
340 __u32 curclust
= START(dentptr
);
341 __u32 endclust
, newclust
;
342 unsigned long actsize
;
344 debug("Filesize: %ld bytes\n", filesize
);
346 if (pos
>= filesize
) {
347 debug("Read position past EOF: %lu\n", pos
);
351 if (maxsize
> 0 && filesize
> pos
+ maxsize
)
352 filesize
= pos
+ maxsize
;
354 debug("%ld bytes\n", filesize
);
356 actsize
= bytesperclust
;
358 /* go to cluster at pos */
359 while (actsize
<= pos
) {
360 curclust
= get_fatent(mydata
, curclust
);
361 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
362 debug("curclust: 0x%x\n", curclust
);
363 debug("Invalid FAT entry\n");
366 actsize
+= bytesperclust
;
370 actsize
-= bytesperclust
;
374 /* align to beginning of next cluster if any */
376 actsize
= min(filesize
, bytesperclust
);
377 if (get_cluster(mydata
, curclust
, get_contents_vfatname_block
,
378 (int)actsize
) != 0) {
379 printf("Error reading cluster\n");
384 memcpy(buffer
, get_contents_vfatname_block
+ pos
, actsize
);
390 curclust
= get_fatent(mydata
, curclust
);
391 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
392 debug("curclust: 0x%x\n", curclust
);
393 debug("Invalid FAT entry\n");
398 actsize
= bytesperclust
;
402 /* search for consecutive clusters */
403 while (actsize
< filesize
) {
404 newclust
= get_fatent(mydata
, endclust
);
405 if ((newclust
- 1) != endclust
)
407 if (CHECK_CLUST(newclust
, mydata
->fatsize
)) {
408 debug("curclust: 0x%x\n", newclust
);
409 debug("Invalid FAT entry\n");
413 actsize
+= bytesperclust
;
416 /* get remaining bytes */
418 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
419 printf("Error reading cluster\n");
425 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
426 printf("Error reading cluster\n");
429 gotsize
+= (int)actsize
;
433 curclust
= get_fatent(mydata
, endclust
);
434 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
435 debug("curclust: 0x%x\n", curclust
);
436 printf("Invalid FAT entry\n");
439 actsize
= bytesperclust
;
444 #ifdef CONFIG_SUPPORT_VFAT
446 * Extract the file name information from 'slotptr' into 'l_name',
447 * starting at l_name[*idx].
448 * Return 1 if terminator (zero byte) is found, 0 otherwise.
450 static int slot2str(dir_slot
*slotptr
, char *l_name
, int *idx
)
454 for (j
= 0; j
<= 8; j
+= 2) {
455 l_name
[*idx
] = slotptr
->name0_4
[j
];
456 if (l_name
[*idx
] == 0x00)
460 for (j
= 0; j
<= 10; j
+= 2) {
461 l_name
[*idx
] = slotptr
->name5_10
[j
];
462 if (l_name
[*idx
] == 0x00)
466 for (j
= 0; j
<= 2; j
+= 2) {
467 l_name
[*idx
] = slotptr
->name11_12
[j
];
468 if (l_name
[*idx
] == 0x00)
477 * Extract the full long filename starting at 'retdent' (which is really
478 * a slot) into 'l_name'. If successful also copy the real directory entry
480 * Return 0 on success, -1 otherwise.
483 get_vfatname(fsdata
*mydata
, int curclust
, __u8
*cluster
,
484 dir_entry
*retdent
, char *l_name
)
487 dir_slot
*slotptr
= (dir_slot
*)retdent
;
488 __u8
*buflimit
= cluster
+ mydata
->sect_size
* ((curclust
== 0) ?
491 __u8 counter
= (slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff;
494 if (counter
> VFAT_MAXSEQ
) {
495 debug("Error: VFAT name is too long\n");
499 while ((__u8
*)slotptr
< buflimit
) {
502 if (((slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff) != counter
)
508 if ((__u8
*)slotptr
>= buflimit
) {
513 curclust
= get_fatent(mydata
, curclust
);
514 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
515 debug("curclust: 0x%x\n", curclust
);
516 printf("Invalid FAT entry\n");
520 if (get_cluster(mydata
, curclust
, get_contents_vfatname_block
,
521 mydata
->clust_size
* mydata
->sect_size
) != 0) {
522 debug("Error: reading directory block\n");
526 slotptr2
= (dir_slot
*)get_contents_vfatname_block
;
527 while (counter
> 0) {
528 if (((slotptr2
->id
& ~LAST_LONG_ENTRY_MASK
)
535 /* Save the real directory entry */
536 realdent
= (dir_entry
*)slotptr2
;
537 while ((__u8
*)slotptr2
> get_contents_vfatname_block
) {
539 slot2str(slotptr2
, l_name
, &idx
);
542 /* Save the real directory entry */
543 realdent
= (dir_entry
*)slotptr
;
548 if (slot2str(slotptr
, l_name
, &idx
))
550 } while (!(slotptr
->id
& LAST_LONG_ENTRY_MASK
));
553 if (*l_name
== DELETED_FLAG
)
555 else if (*l_name
== aRING
)
556 *l_name
= DELETED_FLAG
;
559 /* Return the real directory entry */
560 memcpy(retdent
, realdent
, sizeof(dir_entry
));
565 /* Calculate short name checksum */
566 static __u8
mkcksum(const char name
[8], const char ext
[3])
572 for (i
= 0; i
< sizeof(name
); i
++)
573 ret
= (((ret
& 1) << 7) | ((ret
& 0xfe) >> 1)) + name
[i
];
574 for (i
= 0; i
< sizeof(ext
); i
++)
575 ret
= (((ret
& 1) << 7) | ((ret
& 0xfe) >> 1)) + ext
[i
];
579 #endif /* CONFIG_SUPPORT_VFAT */
582 * Get the directory entry associated with 'filename' from the directory
583 * starting at 'startsect'
585 __u8 get_dentfromdir_block
[MAX_CLUSTSIZE
]
586 __aligned(ARCH_DMA_MINALIGN
);
588 static dir_entry
*get_dentfromdir(fsdata
*mydata
, int startsect
,
589 char *filename
, dir_entry
*retdent
,
592 __u16 prevcksum
= 0xffff;
593 __u32 curclust
= START(retdent
);
594 int files
= 0, dirs
= 0;
596 debug("get_dentfromdir: %s\n", filename
);
603 if (get_cluster(mydata
, curclust
, get_dentfromdir_block
,
604 mydata
->clust_size
* mydata
->sect_size
) != 0) {
605 debug("Error: reading directory block\n");
609 dentptr
= (dir_entry
*)get_dentfromdir_block
;
611 for (i
= 0; i
< DIRENTSPERCLUST
; i
++) {
612 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
615 if (dentptr
->name
[0] == DELETED_FLAG
) {
619 if ((dentptr
->attr
& ATTR_VOLUME
)) {
620 #ifdef CONFIG_SUPPORT_VFAT
621 if ((dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
622 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
623 prevcksum
= ((dir_slot
*)dentptr
)->alias_checksum
;
624 get_vfatname(mydata
, curclust
,
625 get_dentfromdir_block
,
632 isdir
= (dentptr
->attr
& ATTR_DIR
);
640 if (l_name
[0] != 0) {
647 printf(" %8ld %s%c\n",
648 (long)FAT2CPU32(dentptr
->size
),
660 debug("vfatname: |%s|\n", l_name
);
664 /* Volume label or VFAT entry */
669 if (dentptr
->name
[0] == 0) {
671 printf("\n%d file(s), %d dir(s)\n\n",
674 debug("Dentname == NULL - %d\n", i
);
677 #ifdef CONFIG_SUPPORT_VFAT
678 __u8 csum
= mkcksum(dentptr
->name
, dentptr
->ext
);
679 if (dols
&& csum
== prevcksum
) {
685 get_name(dentptr
, s_name
);
687 int isdir
= (dentptr
->attr
& ATTR_DIR
);
697 if (s_name
[0] != 0) {
705 printf(" %8ld %s%c\n",
706 (long)FAT2CPU32(dentptr
->size
),
718 if (strcmp(filename
, s_name
)
719 && strcmp(filename
, l_name
)) {
720 debug("Mismatch: |%s|%s|\n", s_name
, l_name
);
725 memcpy(retdent
, dentptr
, sizeof(dir_entry
));
727 debug("DentName: %s", s_name
);
728 debug(", start: 0x%x", START(dentptr
));
729 debug(", size: 0x%x %s\n",
730 FAT2CPU32(dentptr
->size
),
731 (dentptr
->attr
& ATTR_DIR
) ? "(DIR)" : "");
736 curclust
= get_fatent(mydata
, curclust
);
737 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
738 debug("curclust: 0x%x\n", curclust
);
739 printf("Invalid FAT entry\n");
748 * Read boot sector and volume info from a FAT filesystem
751 read_bootsectandvi(boot_sector
*bs
, volume_info
*volinfo
, int *fatsize
)
754 volume_info
*vistart
;
757 if (cur_dev
== NULL
) {
758 debug("Error: no device selected\n");
762 block
= memalign(ARCH_DMA_MINALIGN
, cur_dev
->blksz
);
764 debug("Error: allocating block\n");
768 if (disk_read(0, 1, block
) < 0) {
769 debug("Error: reading block\n");
773 memcpy(bs
, block
, sizeof(boot_sector
));
774 bs
->reserved
= FAT2CPU16(bs
->reserved
);
775 bs
->fat_length
= FAT2CPU16(bs
->fat_length
);
776 bs
->secs_track
= FAT2CPU16(bs
->secs_track
);
777 bs
->heads
= FAT2CPU16(bs
->heads
);
778 bs
->total_sect
= FAT2CPU32(bs
->total_sect
);
781 if (bs
->fat_length
== 0) {
783 bs
->fat32_length
= FAT2CPU32(bs
->fat32_length
);
784 bs
->flags
= FAT2CPU16(bs
->flags
);
785 bs
->root_cluster
= FAT2CPU32(bs
->root_cluster
);
786 bs
->info_sector
= FAT2CPU16(bs
->info_sector
);
787 bs
->backup_boot
= FAT2CPU16(bs
->backup_boot
);
788 vistart
= (volume_info
*)(block
+ sizeof(boot_sector
));
791 vistart
= (volume_info
*)&(bs
->fat32_length
);
794 memcpy(volinfo
, vistart
, sizeof(volume_info
));
796 if (*fatsize
== 32) {
797 if (strncmp(FAT32_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0)
800 if (strncmp(FAT12_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
804 if (strncmp(FAT16_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
810 debug("Error: broken fs_type sign\n");
818 __u8 do_fat_read_at_block
[MAX_CLUSTSIZE
]
819 __aligned(ARCH_DMA_MINALIGN
);
822 do_fat_read_at(const char *filename
, unsigned long pos
, void *buffer
,
823 unsigned long maxsize
, int dols
)
825 char fnamecopy
[2048];
829 fsdata
*mydata
= &datablock
;
830 dir_entry
*dentptr
= NULL
;
831 __u16 prevcksum
= 0xffff;
835 int files
= 0, dirs
= 0;
838 __u32 root_cluster
= 0;
839 int rootdir_size
= 0;
842 if (read_bootsectandvi(&bs
, &volinfo
, &mydata
->fatsize
)) {
843 debug("Error: reading boot sector\n");
847 if (mydata
->fatsize
== 32) {
848 root_cluster
= bs
.root_cluster
;
849 mydata
->fatlength
= bs
.fat32_length
;
851 mydata
->fatlength
= bs
.fat_length
;
854 mydata
->fat_sect
= bs
.reserved
;
856 cursect
= mydata
->rootdir_sect
857 = mydata
->fat_sect
+ mydata
->fatlength
* bs
.fats
;
859 mydata
->sect_size
= (bs
.sector_size
[1] << 8) + bs
.sector_size
[0];
860 mydata
->clust_size
= bs
.cluster_size
;
861 if (mydata
->sect_size
!= cur_part_info
.blksz
) {
862 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
863 mydata
->sect_size
, cur_part_info
.blksz
);
867 if (mydata
->fatsize
== 32) {
868 mydata
->data_begin
= mydata
->rootdir_sect
-
869 (mydata
->clust_size
* 2);
871 rootdir_size
= ((bs
.dir_entries
[1] * (int)256 +
875 mydata
->data_begin
= mydata
->rootdir_sect
+
877 (mydata
->clust_size
* 2);
880 mydata
->fatbufnum
= -1;
881 mydata
->fatbuf
= memalign(ARCH_DMA_MINALIGN
, FATBUFSIZE
);
882 if (mydata
->fatbuf
== NULL
) {
883 debug("Error: allocating memory\n");
887 #ifdef CONFIG_SUPPORT_VFAT
888 debug("VFAT Support enabled\n");
890 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
891 mydata
->fatsize
, mydata
->fat_sect
, mydata
->fatlength
);
892 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
893 "Data begins at: %d\n",
895 mydata
->rootdir_sect
,
896 mydata
->rootdir_sect
* mydata
->sect_size
, mydata
->data_begin
);
897 debug("Sector size: %d, cluster size: %d\n", mydata
->sect_size
,
900 /* "cwd" is always the root... */
901 while (ISDIRDELIM(*filename
))
904 /* Make a copy of the filename and convert it to lowercase */
905 strcpy(fnamecopy
, filename
);
908 if (*fnamecopy
== '\0') {
913 } else if ((idx
= dirdelim(fnamecopy
)) >= 0) {
915 fnamecopy
[idx
] = '\0';
916 subname
= fnamecopy
+ idx
+ 1;
918 /* Handle multiple delimiters */
919 while (ISDIRDELIM(*subname
))
930 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
931 cursect
, mydata
->clust_size
, DIRENTSPERBLOCK
);
933 if (disk_read(cursect
,
934 (mydata
->fatsize
== 32) ?
935 (mydata
->clust_size
) :
937 do_fat_read_at_block
) < 0) {
938 debug("Error: reading rootdir block\n");
942 dentptr
= (dir_entry
*) do_fat_read_at_block
;
945 for (i
= 0; i
< DIRENTSPERBLOCK
; i
++) {
946 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
950 if (dentptr
->name
[0] == DELETED_FLAG
) {
955 csum
= mkcksum(dentptr
->name
, dentptr
->ext
);
956 if (dentptr
->attr
& ATTR_VOLUME
) {
957 #ifdef CONFIG_SUPPORT_VFAT
958 if ((dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
959 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
961 ((dir_slot
*)dentptr
)->alias_checksum
;
965 do_fat_read_at_block
,
968 if (dols
== LS_ROOT
) {
972 (dentptr
->attr
& ATTR_DIR
);
980 if (l_name
[0] != 0) {
987 printf(" %8ld %s%c\n",
988 (long)FAT2CPU32(dentptr
->size
),
1000 debug("Rootvfatname: |%s|\n",
1005 /* Volume label or VFAT entry */
1009 } else if (dentptr
->name
[0] == 0) {
1010 debug("RootDentname == NULL - %d\n", i
);
1011 if (dols
== LS_ROOT
) {
1012 printf("\n%d file(s), %d dir(s)\n\n",
1018 #ifdef CONFIG_SUPPORT_VFAT
1019 else if (dols
== LS_ROOT
&& csum
== 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("Filesystem: %s \"%s\"\n", volinfo
.fs_type
, vol_label
);
1243 int file_fat_ls(const char *dir
)
1245 return do_fat_read(dir
, NULL
, 0, LS_YES
);
1248 long file_fat_read_at(const char *filename
, unsigned long pos
, void *buffer
,
1249 unsigned long maxsize
)
1251 printf("reading %s\n", filename
);
1252 return do_fat_read_at(filename
, pos
, buffer
, maxsize
, LS_NO
);
1255 long file_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
)
1257 return file_fat_read_at(filename
, 0, buffer
, maxsize
);