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 (getsize > fatlength)
213 fatlength *= mydata->sect_size; /* We want it in bytes now */
214 startblock += mydata->fat_sect; /* Offset from start of disk */
216 if (disk_read(startblock, getsize, bufptr) < 0) {
217 debug("Error reading FAT blocks\n");
220 mydata->fatbufnum = bufnum;
223 /* Get the actual entry from the table */
224 switch (mydata->fatsize) {
226 ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);
229 ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);
232 off16 = (offset * 3) / 4;
234 switch (offset & 0x3) {
236 ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
240 val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
242 val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
244 ret = (val2 << 4) | (val1 >> 12);
247 val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
249 val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
251 ret = (val2 << 8) | (val1 >> 8);
254 ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
255 ret = (ret & 0xfff0) >> 4;
262 debug("FAT%d: ret: %08x, offset: %04x\n",
263 mydata->fatsize, ret, offset);
269 * Read at most 'size' bytes from the specified cluster into 'buffer'.
270 * Return 0 on success, -1 otherwise.
273 get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
281 startsect = mydata->data_begin +
282 clustnum * mydata->clust_size;
284 startsect = mydata->rootdir_sect;
287 debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
289 nr_sect = size / mydata->sect_size;
290 ret = disk_read(startsect, nr_sect, buffer);
291 if (ret != nr_sect) {
292 debug("Error reading data (got %d)\n", ret);
295 if (size % mydata->sect_size) {
296 ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
298 idx = size / mydata->sect_size;
299 ret = disk_read(startsect + idx, 1, tmpbuf);
301 debug("Error reading data (got %d)\n", ret);
304 buffer += idx * mydata->sect_size;
306 memcpy(buffer, tmpbuf, size % mydata->sect_size);
314 * Read at most 'maxsize' bytes from the file associated with 'dentptr'
316 * Return the number of bytes read or -1 on fatal errors.
319 get_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
320 unsigned long maxsize)
322 unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
323 unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
324 __u32 curclust = START(dentptr);
325 __u32 endclust, newclust;
326 unsigned long actsize;
328 debug("Filesize: %ld bytes\n", filesize);
330 if (maxsize > 0 && filesize > maxsize)
333 debug("%ld bytes\n", filesize);
335 actsize = bytesperclust;
339 /* search for consecutive clusters */
340 while (actsize < filesize) {
341 newclust = get_fatent(mydata, endclust);
342 if ((newclust - 1) != endclust)
344 if (CHECK_CLUST(newclust, mydata->fatsize)) {
345 debug("curclust: 0x%x\n", newclust);
346 debug("Invalid FAT entry\n");
350 actsize += bytesperclust;
353 /* actsize >= file size */
354 actsize -= bytesperclust;
356 /* get remaining clusters */
357 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
358 printf("Error reading cluster\n");
362 /* get remaining bytes */
363 gotsize += (int)actsize;
367 if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
368 printf("Error reading cluster\n");
374 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
375 printf("Error reading cluster\n");
378 gotsize += (int)actsize;
382 curclust = get_fatent(mydata, endclust);
383 if (CHECK_CLUST(curclust, mydata->fatsize)) {
384 debug("curclust: 0x%x\n", curclust);
385 printf("Invalid FAT entry\n");
388 actsize = bytesperclust;
393 #ifdef CONFIG_SUPPORT_VFAT
395 * Extract the file name information from 'slotptr' into 'l_name',
396 * starting at l_name[*idx].
397 * Return 1 if terminator (zero byte) is found, 0 otherwise.
399 static int slot2str(dir_slot *slotptr, char *l_name, int *idx)
403 for (j = 0; j <= 8; j += 2) {
404 l_name[*idx] = slotptr->name0_4[j];
405 if (l_name[*idx] == 0x00)
409 for (j = 0; j <= 10; j += 2) {
410 l_name[*idx] = slotptr->name5_10[j];
411 if (l_name[*idx] == 0x00)
415 for (j = 0; j <= 2; j += 2) {
416 l_name[*idx] = slotptr->name11_12[j];
417 if (l_name[*idx] == 0x00)
426 * Extract the full long filename starting at 'retdent' (which is really
427 * a slot) into 'l_name'. If successful also copy the real directory entry
429 * Return 0 on success, -1 otherwise.
431 __u8 get_vfatname_block[MAX_CLUSTSIZE]
432 __aligned(ARCH_DMA_MINALIGN);
435 get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
436 dir_entry *retdent, char *l_name)
439 dir_slot *slotptr = (dir_slot *)retdent;
440 __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
443 __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
446 if (counter > VFAT_MAXSEQ) {
447 debug("Error: VFAT name is too long\n");
451 while ((__u8 *)slotptr < buflimit) {
454 if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
460 if ((__u8 *)slotptr >= buflimit) {
465 curclust = get_fatent(mydata, curclust);
466 if (CHECK_CLUST(curclust, mydata->fatsize)) {
467 debug("curclust: 0x%x\n", curclust);
468 printf("Invalid FAT entry\n");
472 if (get_cluster(mydata, curclust, get_vfatname_block,
473 mydata->clust_size * mydata->sect_size) != 0) {
474 debug("Error: reading directory block\n");
478 slotptr2 = (dir_slot *)get_vfatname_block;
479 while (counter > 0) {
480 if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
487 /* Save the real directory entry */
488 realdent = (dir_entry *)slotptr2;
489 while ((__u8 *)slotptr2 > get_vfatname_block) {
491 slot2str(slotptr2, l_name, &idx);
494 /* Save the real directory entry */
495 realdent = (dir_entry *)slotptr;
500 if (slot2str(slotptr, l_name, &idx))
502 } while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
505 if (*l_name == DELETED_FLAG)
507 else if (*l_name == aRING)
508 *l_name = DELETED_FLAG;
511 /* Return the real directory entry */
512 memcpy(retdent, realdent, sizeof(dir_entry));
517 /* Calculate short name checksum */
518 static __u8 mkcksum(const char *str)
524 for (i = 0; i < 11; i++) {
525 ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + str[i];
530 #endif /* CONFIG_SUPPORT_VFAT */
533 * Get the directory entry associated with 'filename' from the directory
534 * starting at 'startsect'
536 __u8 get_dentfromdir_block[MAX_CLUSTSIZE]
537 __aligned(ARCH_DMA_MINALIGN);
539 static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
540 char *filename, dir_entry *retdent,
543 __u16 prevcksum = 0xffff;
544 __u32 curclust = START(retdent);
545 int files = 0, dirs = 0;
547 debug("get_dentfromdir: %s\n", filename);
554 if (get_cluster(mydata, curclust, get_dentfromdir_block,
555 mydata->clust_size * mydata->sect_size) != 0) {
556 debug("Error: reading directory block\n");
560 dentptr = (dir_entry *)get_dentfromdir_block;
562 for (i = 0; i < DIRENTSPERCLUST; i++) {
563 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
566 if (dentptr->name[0] == DELETED_FLAG) {
570 if ((dentptr->attr & ATTR_VOLUME)) {
571 #ifdef CONFIG_SUPPORT_VFAT
572 if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
573 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
574 prevcksum = ((dir_slot *)dentptr)->alias_checksum;
575 get_vfatname(mydata, curclust,
576 get_dentfromdir_block,
583 isdir = (dentptr->attr & ATTR_DIR);
591 if (l_name[0] != 0) {
598 printf(" %8ld %s%c\n",
599 (long)FAT2CPU32(dentptr->size),
611 debug("vfatname: |%s|\n", l_name);
615 /* Volume label or VFAT entry */
620 if (dentptr->name[0] == 0) {
622 printf("\n%d file(s), %d dir(s)\n\n",
625 debug("Dentname == NULL - %d\n", i);
628 #ifdef CONFIG_SUPPORT_VFAT
629 if (dols && mkcksum(dentptr->name) == prevcksum) {
635 get_name(dentptr, s_name);
637 int isdir = (dentptr->attr & ATTR_DIR);
647 if (s_name[0] != 0) {
655 printf(" %8ld %s%c\n",
656 (long)FAT2CPU32(dentptr->size),
668 if (strcmp(filename, s_name)
669 && strcmp(filename, l_name)) {
670 debug("Mismatch: |%s|%s|\n", s_name, l_name);
675 memcpy(retdent, dentptr, sizeof(dir_entry));
677 debug("DentName: %s", s_name);
678 debug(", start: 0x%x", START(dentptr));
679 debug(", size: 0x%x %s\n",
680 FAT2CPU32(dentptr->size),
681 (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
686 curclust = get_fatent(mydata, curclust);
687 if (CHECK_CLUST(curclust, mydata->fatsize)) {
688 debug("curclust: 0x%x\n", curclust);
689 printf("Invalid FAT entry\n");
698 * Read boot sector and volume info from a FAT filesystem
701 read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize)
704 volume_info *vistart;
707 if (cur_dev == NULL) {
708 debug("Error: no device selected\n");
712 block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
714 debug("Error: allocating block\n");
718 if (disk_read(0, 1, block) < 0) {
719 debug("Error: reading block\n");
723 memcpy(bs, block, sizeof(boot_sector));
724 bs->reserved = FAT2CPU16(bs->reserved);
725 bs->fat_length = FAT2CPU16(bs->fat_length);
726 bs->secs_track = FAT2CPU16(bs->secs_track);
727 bs->heads = FAT2CPU16(bs->heads);
728 bs->total_sect = FAT2CPU32(bs->total_sect);
731 if (bs->fat_length == 0) {
733 bs->fat32_length = FAT2CPU32(bs->fat32_length);
734 bs->flags = FAT2CPU16(bs->flags);
735 bs->root_cluster = FAT2CPU32(bs->root_cluster);
736 bs->info_sector = FAT2CPU16(bs->info_sector);
737 bs->backup_boot = FAT2CPU16(bs->backup_boot);
738 vistart = (volume_info *)(block + sizeof(boot_sector));
741 vistart = (volume_info *)&(bs->fat32_length);
744 memcpy(volinfo, vistart, sizeof(volume_info));
746 if (*fatsize == 32) {
747 if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
750 if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
754 if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
760 debug("Error: broken fs_type sign\n");
768 __u8 do_fat_read_block[MAX_CLUSTSIZE]
769 __aligned(ARCH_DMA_MINALIGN);
772 do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
774 char fnamecopy[2048];
778 fsdata *mydata = &datablock;
780 __u16 prevcksum = 0xffff;
784 int files = 0, dirs = 0;
787 __u32 root_cluster = 0;
788 int rootdir_size = 0;
791 if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
792 debug("Error: reading boot sector\n");
796 if (mydata->fatsize == 32) {
797 root_cluster = bs.root_cluster;
798 mydata->fatlength = bs.fat32_length;
800 mydata->fatlength = bs.fat_length;
803 mydata->fat_sect = bs.reserved;
805 cursect = mydata->rootdir_sect
806 = mydata->fat_sect + mydata->fatlength * bs.fats;
808 mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
809 mydata->clust_size = bs.cluster_size;
810 if (mydata->sect_size != cur_part_info.blksz) {
811 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
812 mydata->sect_size, cur_part_info.blksz);
816 if (mydata->fatsize == 32) {
817 mydata->data_begin = mydata->rootdir_sect -
818 (mydata->clust_size * 2);
820 rootdir_size = ((bs.dir_entries[1] * (int)256 +
824 mydata->data_begin = mydata->rootdir_sect +
826 (mydata->clust_size * 2);
829 mydata->fatbufnum = -1;
830 mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
831 if (mydata->fatbuf == NULL) {
832 debug("Error: allocating memory\n");
836 #ifdef CONFIG_SUPPORT_VFAT
837 debug("VFAT Support enabled\n");
839 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
840 mydata->fatsize, mydata->fat_sect, mydata->fatlength);
841 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
842 "Data begins at: %d\n",
844 mydata->rootdir_sect,
845 mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);
846 debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,
849 /* "cwd" is always the root... */
850 while (ISDIRDELIM(*filename))
853 /* Make a copy of the filename and convert it to lowercase */
854 strcpy(fnamecopy, filename);
857 if (*fnamecopy == '\0') {
862 } else if ((idx = dirdelim(fnamecopy)) >= 0) {
864 fnamecopy[idx] = '\0';
865 subname = fnamecopy + idx + 1;
867 /* Handle multiple delimiters */
868 while (ISDIRDELIM(*subname))
878 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
879 cursect, mydata->clust_size, DIRENTSPERBLOCK);
881 if (disk_read(cursect,
882 (mydata->fatsize == 32) ?
883 (mydata->clust_size) :
885 do_fat_read_block) < 0) {
886 debug("Error: reading rootdir block\n");
890 dentptr = (dir_entry *) do_fat_read_block;
892 for (i = 0; i < DIRENTSPERBLOCK; i++) {
893 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
896 if (dentptr->name[0] == DELETED_FLAG) {
900 if ((dentptr->attr & ATTR_VOLUME)) {
901 #ifdef CONFIG_SUPPORT_VFAT
902 if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
903 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
905 ((dir_slot *)dentptr)->alias_checksum;
912 if (dols == LS_ROOT) {
916 (dentptr->attr & ATTR_DIR);
924 if (l_name[0] != 0) {
931 printf(" %8ld %s%c\n",
932 (long)FAT2CPU32(dentptr->size),
944 debug("Rootvfatname: |%s|\n",
949 /* Volume label or VFAT entry */
953 } else if (dentptr->name[0] == 0) {
954 debug("RootDentname == NULL - %d\n", i);
955 if (dols == LS_ROOT) {
956 printf("\n%d file(s), %d dir(s)\n\n",
962 #ifdef CONFIG_SUPPORT_VFAT
963 else if (dols == LS_ROOT &&
964 mkcksum(dentptr->name) == prevcksum) {
970 get_name(dentptr, s_name);
972 if (dols == LS_ROOT) {
973 int isdir = (dentptr->attr & ATTR_DIR);
979 if (s_name[0] != 0) {
985 if (s_name[0] != 0) {
992 printf(" %8ld %s%c\n",
993 (long)FAT2CPU32(dentptr->size),
1004 if (strcmp(fnamecopy, s_name)
1005 && strcmp(fnamecopy, l_name)) {
1006 debug("RootMismatch: |%s|%s|\n", s_name,
1012 if (isdir && !(dentptr->attr & ATTR_DIR))
1015 debug("RootName: %s", s_name);
1016 debug(", start: 0x%x", START(dentptr));
1017 debug(", size: 0x%x %s\n",
1018 FAT2CPU32(dentptr->size),
1019 isdir ? "(DIR)" : "");
1021 goto rootdir_done; /* We got a match */
1023 debug("END LOOP: j=%d clust_size=%d\n", j,
1024 mydata->clust_size);
1027 * On FAT32 we must fetch the FAT entries for the next
1028 * root directory clusters when a cluster has been
1029 * completely processed.
1033 if ((mydata->fatsize == 32) && (j == mydata->clust_size)) {
1037 nxt_clust = get_fatent(mydata, root_cluster);
1038 fat32_end = CHECK_CLUST(nxt_clust, 32);
1040 nxtsect = mydata->data_begin +
1041 (nxt_clust * mydata->clust_size);
1043 root_cluster = nxt_clust;
1051 /* If end of rootdir reached */
1052 if ((mydata->fatsize == 32 && fat32_end) ||
1053 (mydata->fatsize != 32 && j == rootdir_size)) {
1054 if (dols == LS_ROOT) {
1055 printf("\n%d file(s), %d dir(s)\n\n",
1067 int startsect = mydata->data_begin
1068 + START(dentptr) * mydata->clust_size;
1070 char *nextname = NULL;
1075 idx = dirdelim(subname);
1078 subname[idx] = '\0';
1079 nextname = subname + idx + 1;
1080 /* Handle multiple delimiters */
1081 while (ISDIRDELIM(*nextname))
1083 if (dols && *nextname == '\0')
1086 if (dols && firsttime) {
1093 if (get_dentfromdir(mydata, startsect, subname, dentptr,
1094 isdir ? 0 : dols) == NULL) {
1101 if (!(dentptr->attr & ATTR_DIR))
1107 ret = get_contents(mydata, dentptr, buffer, maxsize);
1108 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
1111 free(mydata->fatbuf);
1115 int file_fat_detectfs(void)
1118 volume_info volinfo;
1122 if (cur_dev == NULL) {
1123 printf("No current device\n");
1127 #if defined(CONFIG_CMD_IDE) || \
1128 defined(CONFIG_CMD_SATA) || \
1129 defined(CONFIG_CMD_SCSI) || \
1130 defined(CONFIG_CMD_USB) || \
1132 printf("Interface: ");
1133 switch (cur_dev->if_type) {
1159 printf("\n Device %d: ", cur_dev->dev);
1163 if (read_bootsectandvi(&bs, &volinfo, &fatsize)) {
1164 printf("\nNo valid FAT fs found\n");
1168 memcpy(vol_label, volinfo.volume_label, 11);
1169 vol_label[11] = '\0';
1170 volinfo.fs_type[5] = '\0';
1172 printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr,
1173 volinfo.fs_type, vol_label);
1178 int file_fat_ls(const char *dir)
1180 return do_fat_read(dir, NULL, 0, LS_YES);
1183 long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
1185 printf("reading %s\n", filename);
1186 return do_fat_read(filename, buffer, maxsize, LS_NO);