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,
282 startsect = mydata->data_begin +
283 clustnum * mydata->clust_size;
285 startsect = mydata->rootdir_sect;
288 debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
290 nr_sect = size / mydata->sect_size;
291 ret = disk_read(startsect, nr_sect, buffer);
292 if (ret != nr_sect) {
293 debug("Error reading data (got %d)\n", ret);
296 if (size % mydata->sect_size) {
297 ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
299 idx = size / mydata->sect_size;
300 ret = disk_read(startsect + idx, 1, tmpbuf);
302 debug("Error reading data (got %d)\n", ret);
305 buffer += idx * mydata->sect_size;
307 memcpy(buffer, tmpbuf, size % mydata->sect_size);
315 * Read at most 'maxsize' bytes from the file associated with 'dentptr'
317 * Return the number of bytes read or -1 on fatal errors.
320 get_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
321 unsigned long maxsize)
323 unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
324 unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
325 __u32 curclust = START(dentptr);
326 __u32 endclust, newclust;
327 unsigned long actsize;
329 debug("Filesize: %ld bytes\n", filesize);
331 if (maxsize > 0 && filesize > maxsize)
334 debug("%ld bytes\n", filesize);
336 actsize = bytesperclust;
340 /* search for consecutive clusters */
341 while (actsize < filesize) {
342 newclust = get_fatent(mydata, endclust);
343 if ((newclust - 1) != endclust)
345 if (CHECK_CLUST(newclust, mydata->fatsize)) {
346 debug("curclust: 0x%x\n", newclust);
347 debug("Invalid FAT entry\n");
351 actsize += bytesperclust;
354 /* actsize >= file size */
355 actsize -= bytesperclust;
357 /* get remaining clusters */
358 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
359 printf("Error reading cluster\n");
363 /* get remaining bytes */
364 gotsize += (int)actsize;
368 if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
369 printf("Error reading cluster\n");
375 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
376 printf("Error reading cluster\n");
379 gotsize += (int)actsize;
383 curclust = get_fatent(mydata, endclust);
384 if (CHECK_CLUST(curclust, mydata->fatsize)) {
385 debug("curclust: 0x%x\n", curclust);
386 printf("Invalid FAT entry\n");
389 actsize = bytesperclust;
394 #ifdef CONFIG_SUPPORT_VFAT
396 * Extract the file name information from 'slotptr' into 'l_name',
397 * starting at l_name[*idx].
398 * Return 1 if terminator (zero byte) is found, 0 otherwise.
400 static int slot2str (dir_slot *slotptr, char *l_name, int *idx)
404 for (j = 0; j <= 8; j += 2) {
405 l_name[*idx] = slotptr->name0_4[j];
406 if (l_name[*idx] == 0x00)
410 for (j = 0; j <= 10; j += 2) {
411 l_name[*idx] = slotptr->name5_10[j];
412 if (l_name[*idx] == 0x00)
416 for (j = 0; j <= 2; j += 2) {
417 l_name[*idx] = slotptr->name11_12[j];
418 if (l_name[*idx] == 0x00)
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]
433 __aligned(ARCH_DMA_MINALIGN);
436 get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
437 dir_entry *retdent, char *l_name)
440 dir_slot *slotptr = (dir_slot *)retdent;
441 __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
444 __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
447 if (counter > VFAT_MAXSEQ) {
448 debug("Error: VFAT name is too long\n");
452 while ((__u8 *)slotptr < buflimit) {
455 if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
461 if ((__u8 *)slotptr >= buflimit) {
466 curclust = get_fatent(mydata, curclust);
467 if (CHECK_CLUST(curclust, mydata->fatsize)) {
468 debug("curclust: 0x%x\n", curclust);
469 printf("Invalid FAT entry\n");
473 if (get_cluster(mydata, curclust, get_vfatname_block,
474 mydata->clust_size * mydata->sect_size) != 0) {
475 debug("Error: reading directory block\n");
479 slotptr2 = (dir_slot *)get_vfatname_block;
480 while (counter > 0) {
481 if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
488 /* Save the real directory entry */
489 realdent = (dir_entry *)slotptr2;
490 while ((__u8 *)slotptr2 > get_vfatname_block) {
492 slot2str(slotptr2, l_name, &idx);
495 /* Save the real directory entry */
496 realdent = (dir_entry *)slotptr;
501 if (slot2str(slotptr, l_name, &idx))
503 } while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
506 if (*l_name == DELETED_FLAG)
508 else if (*l_name == aRING)
509 *l_name = DELETED_FLAG;
512 /* Return the real directory entry */
513 memcpy(retdent, realdent, sizeof(dir_entry));
518 /* Calculate short name checksum */
519 static __u8 mkcksum (const char *str)
525 for (i = 0; i < 11; i++) {
526 ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + str[i];
531 #endif /* CONFIG_SUPPORT_VFAT */
534 * Get the directory entry associated with 'filename' from the directory
535 * starting at 'startsect'
537 __u8 get_dentfromdir_block[MAX_CLUSTSIZE]
538 __aligned(ARCH_DMA_MINALIGN);
540 static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
541 char *filename, dir_entry *retdent,
544 __u16 prevcksum = 0xffff;
545 __u32 curclust = START(retdent);
546 int files = 0, dirs = 0;
548 debug("get_dentfromdir: %s\n", filename);
555 if (get_cluster(mydata, curclust, get_dentfromdir_block,
556 mydata->clust_size * mydata->sect_size) != 0) {
557 debug("Error: reading directory block\n");
561 dentptr = (dir_entry *)get_dentfromdir_block;
563 for (i = 0; i < DIRENTSPERCLUST; i++) {
564 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
567 if (dentptr->name[0] == DELETED_FLAG) {
571 if ((dentptr->attr & ATTR_VOLUME)) {
572 #ifdef CONFIG_SUPPORT_VFAT
573 if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
574 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
575 prevcksum = ((dir_slot *)dentptr)->alias_checksum;
576 get_vfatname(mydata, curclust,
577 get_dentfromdir_block,
584 isdir = (dentptr->attr & ATTR_DIR);
592 if (l_name[0] != 0) {
599 printf(" %8ld %s%c\n",
600 (long)FAT2CPU32(dentptr->size),
612 debug("vfatname: |%s|\n", l_name);
616 /* Volume label or VFAT entry */
621 if (dentptr->name[0] == 0) {
623 printf("\n%d file(s), %d dir(s)\n\n",
626 debug("Dentname == NULL - %d\n", i);
629 #ifdef CONFIG_SUPPORT_VFAT
630 if (dols && mkcksum(dentptr->name) == prevcksum) {
636 get_name(dentptr, s_name);
638 int isdir = (dentptr->attr & ATTR_DIR);
648 if (s_name[0] != 0) {
656 printf(" %8ld %s%c\n",
657 (long)FAT2CPU32(dentptr->size),
669 if (strcmp(filename, s_name)
670 && strcmp(filename, l_name)) {
671 debug("Mismatch: |%s|%s|\n", s_name, l_name);
676 memcpy(retdent, dentptr, sizeof(dir_entry));
678 debug("DentName: %s", s_name);
679 debug(", start: 0x%x", START(dentptr));
680 debug(", size: 0x%x %s\n",
681 FAT2CPU32(dentptr->size),
682 (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
687 curclust = get_fatent(mydata, curclust);
688 if (CHECK_CLUST(curclust, mydata->fatsize)) {
689 debug("curclust: 0x%x\n", curclust);
690 printf("Invalid FAT entry\n");
699 * Read boot sector and volume info from a FAT filesystem
702 read_bootsectandvi (boot_sector *bs, volume_info *volinfo, int *fatsize)
705 volume_info *vistart;
708 if (cur_dev == NULL) {
709 debug("Error: no device selected\n");
713 block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
715 debug("Error: allocating block\n");
719 if (disk_read (0, 1, block) < 0) {
720 debug("Error: reading block\n");
724 memcpy(bs, block, sizeof(boot_sector));
725 bs->reserved = FAT2CPU16(bs->reserved);
726 bs->fat_length = FAT2CPU16(bs->fat_length);
727 bs->secs_track = FAT2CPU16(bs->secs_track);
728 bs->heads = FAT2CPU16(bs->heads);
729 bs->total_sect = FAT2CPU32(bs->total_sect);
732 if (bs->fat_length == 0) {
734 bs->fat32_length = FAT2CPU32(bs->fat32_length);
735 bs->flags = FAT2CPU16(bs->flags);
736 bs->root_cluster = FAT2CPU32(bs->root_cluster);
737 bs->info_sector = FAT2CPU16(bs->info_sector);
738 bs->backup_boot = FAT2CPU16(bs->backup_boot);
739 vistart = (volume_info *)(block + sizeof(boot_sector));
742 vistart = (volume_info *)&(bs->fat32_length);
745 memcpy(volinfo, vistart, sizeof(volume_info));
747 if (*fatsize == 32) {
748 if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
751 if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
755 if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
761 debug("Error: broken fs_type sign\n");
769 __u8 do_fat_read_block[MAX_CLUSTSIZE]
770 __aligned(ARCH_DMA_MINALIGN);
773 do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
776 char fnamecopy[2048];
780 fsdata *mydata = &datablock;
782 __u16 prevcksum = 0xffff;
786 int files = 0, dirs = 0;
789 __u32 root_cluster = 0;
790 int rootdir_size = 0;
793 if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
794 debug("Error: reading boot sector\n");
798 if (mydata->fatsize == 32) {
799 root_cluster = bs.root_cluster;
800 mydata->fatlength = bs.fat32_length;
802 mydata->fatlength = bs.fat_length;
805 mydata->fat_sect = bs.reserved;
807 cursect = mydata->rootdir_sect
808 = mydata->fat_sect + mydata->fatlength * bs.fats;
810 mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
811 mydata->clust_size = bs.cluster_size;
812 if (mydata->sect_size != cur_part_info.blksz) {
813 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
814 mydata->sect_size, cur_part_info.blksz);
818 if (mydata->fatsize == 32) {
819 mydata->data_begin = mydata->rootdir_sect -
820 (mydata->clust_size * 2);
822 rootdir_size = ((bs.dir_entries[1] * (int)256 +
826 mydata->data_begin = mydata->rootdir_sect +
828 (mydata->clust_size * 2);
831 mydata->fatbufnum = -1;
832 mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
833 if (mydata->fatbuf == NULL) {
834 debug("Error: allocating memory\n");
838 #ifdef CONFIG_SUPPORT_VFAT
839 debug("VFAT Support enabled\n");
841 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
842 mydata->fatsize, mydata->fat_sect, mydata->fatlength);
843 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
844 "Data begins at: %d\n",
846 mydata->rootdir_sect,
847 mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);
848 debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,
851 /* "cwd" is always the root... */
852 while (ISDIRDELIM(*filename))
855 /* Make a copy of the filename and convert it to lowercase */
856 strcpy(fnamecopy, filename);
859 if (*fnamecopy == '\0') {
864 } else if ((idx = dirdelim(fnamecopy)) >= 0) {
866 fnamecopy[idx] = '\0';
867 subname = fnamecopy + idx + 1;
869 /* Handle multiple delimiters */
870 while (ISDIRDELIM(*subname))
880 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
881 cursect, mydata->clust_size, DIRENTSPERBLOCK);
883 if (disk_read(cursect,
884 (mydata->fatsize == 32) ?
885 (mydata->clust_size) :
887 do_fat_read_block) < 0) {
888 debug("Error: reading rootdir block\n");
892 dentptr = (dir_entry *) do_fat_read_block;
894 for (i = 0; i < DIRENTSPERBLOCK; i++) {
895 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
898 if (dentptr->name[0] == DELETED_FLAG) {
902 if ((dentptr->attr & ATTR_VOLUME)) {
903 #ifdef CONFIG_SUPPORT_VFAT
904 if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
905 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
907 ((dir_slot *)dentptr)->alias_checksum;
914 if (dols == LS_ROOT) {
918 (dentptr->attr & ATTR_DIR);
926 if (l_name[0] != 0) {
933 printf(" %8ld %s%c\n",
934 (long)FAT2CPU32(dentptr->size),
946 debug("Rootvfatname: |%s|\n",
951 /* Volume label or VFAT entry */
955 } else if (dentptr->name[0] == 0) {
956 debug("RootDentname == NULL - %d\n", i);
957 if (dols == LS_ROOT) {
958 printf("\n%d file(s), %d dir(s)\n\n",
964 #ifdef CONFIG_SUPPORT_VFAT
965 else if (dols == LS_ROOT &&
966 mkcksum(dentptr->name) == prevcksum) {
972 get_name(dentptr, s_name);
974 if (dols == LS_ROOT) {
975 int isdir = (dentptr->attr & ATTR_DIR);
981 if (s_name[0] != 0) {
987 if (s_name[0] != 0) {
994 printf(" %8ld %s%c\n",
995 (long)FAT2CPU32(dentptr->size),
1006 if (strcmp(fnamecopy, s_name)
1007 && strcmp(fnamecopy, l_name)) {
1008 debug("RootMismatch: |%s|%s|\n", s_name,
1014 if (isdir && !(dentptr->attr & ATTR_DIR))
1017 debug("RootName: %s", s_name);
1018 debug(", start: 0x%x", START(dentptr));
1019 debug(", size: 0x%x %s\n",
1020 FAT2CPU32(dentptr->size),
1021 isdir ? "(DIR)" : "");
1023 goto rootdir_done; /* We got a match */
1025 debug("END LOOP: j=%d clust_size=%d\n", j,
1026 mydata->clust_size);
1029 * On FAT32 we must fetch the FAT entries for the next
1030 * root directory clusters when a cluster has been
1031 * completely processed.
1035 if ((mydata->fatsize == 32) && (j == mydata->clust_size)) {
1039 nxt_clust = get_fatent(mydata, root_cluster);
1040 fat32_end = CHECK_CLUST(nxt_clust, 32);
1042 nxtsect = mydata->data_begin +
1043 (nxt_clust * mydata->clust_size);
1045 root_cluster = nxt_clust;
1053 /* If end of rootdir reached */
1054 if ((mydata->fatsize == 32 && fat32_end) ||
1055 (mydata->fatsize != 32 && j == rootdir_size)) {
1056 if (dols == LS_ROOT) {
1057 printf("\n%d file(s), %d dir(s)\n\n",
1069 int startsect = mydata->data_begin
1070 + START(dentptr) * mydata->clust_size;
1072 char *nextname = NULL;
1077 idx = dirdelim(subname);
1080 subname[idx] = '\0';
1081 nextname = subname + idx + 1;
1082 /* Handle multiple delimiters */
1083 while (ISDIRDELIM(*nextname))
1085 if (dols && *nextname == '\0')
1088 if (dols && firsttime) {
1095 if (get_dentfromdir(mydata, startsect, subname, dentptr,
1096 isdir ? 0 : dols) == NULL) {
1103 if (!(dentptr->attr & ATTR_DIR))
1109 ret = get_contents(mydata, dentptr, buffer, maxsize);
1110 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
1113 free(mydata->fatbuf);
1117 int file_fat_detectfs (void)
1120 volume_info volinfo;
1124 if (cur_dev == NULL) {
1125 printf("No current device\n");
1129 #if defined(CONFIG_CMD_IDE) || \
1130 defined(CONFIG_CMD_SATA) || \
1131 defined(CONFIG_CMD_SCSI) || \
1132 defined(CONFIG_CMD_USB) || \
1134 printf("Interface: ");
1135 switch (cur_dev->if_type) {
1161 printf("\n Device %d: ", cur_dev->dev);
1165 if (read_bootsectandvi(&bs, &volinfo, &fatsize)) {
1166 printf("\nNo valid FAT fs found\n");
1170 memcpy(vol_label, volinfo.volume_label, 11);
1171 vol_label[11] = '\0';
1172 volinfo.fs_type[5] = '\0';
1174 printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr,
1175 volinfo.fs_type, vol_label);
1180 int file_fat_ls (const char *dir)
1182 return do_fat_read(dir, NULL, 0, LS_YES);
1185 long file_fat_read (const char *filename, void *buffer, unsigned long maxsize)
1187 printf("reading %s\n", filename);
1188 return do_fat_read(filename, buffer, maxsize, LS_NO);