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m---------x-loader0
-rw-r--r--x-loader/fs/fat/fat.c927
2 files changed, 927 insertions, 0 deletions
diff --git a/x-loader b/x-loader
deleted file mode 160000
-Subproject 1c9276af4d6a5b7014a7630a1abeddf3b317756
diff --git a/x-loader/fs/fat/fat.c b/x-loader/fs/fat/fat.c
new file mode 100644
index 0000000..0e91556
--- /dev/null
+++ b/x-loader/fs/fat/fat.c
@@ -0,0 +1,927 @@
+/*
+ * fat.c
+ *
+ * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
+ *
+ * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
+ * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <part.h>
+#include <fat.h>
+#include <asm/byteorder.h>
+
+#ifdef CFG_CMD_FAT
+
+/*
+ * Convert a string to lowercase.
+ */
+static void
+downcase(char *str)
+{
+ while (*str != '\0') {
+ TOLOWER(*str);
+ str++;
+ }
+}
+
+static block_dev_desc_t *cur_dev = NULL;
+static unsigned long part_offset = 0;
+static int cur_part = 1;
+
+#define DOS_PART_TBL_OFFSET 0x1be
+#define DOS_PART_MAGIC_OFFSET 0x1fe
+#define DOS_FS_TYPE_OFFSET 0x52
+
+int strncmp(const char * cs,const char * ct,size_t count)
+{
+ register signed char __res = 0;
+
+ while (count) {
+ if ((__res = *cs - *ct++) != 0 || !*cs++)
+ break;
+ count--;
+ }
+
+ return __res;
+}
+
+char * strcpy(char * dest,const char *src)
+{
+ char *tmp = dest;
+
+ while ((*dest++ = *src++) != '\0')
+ /* nothing */;
+ return tmp;
+}
+
+int strcmp(const char * cs,const char * ct)
+{
+ register signed char __res;
+
+ while (1) {
+ if ((__res = *cs - *ct++) != 0 || !*cs++)
+ break;
+ }
+
+ return __res;
+}
+void * memcpy(void * dest,const void *src,size_t count)
+{
+ char *tmp = (char *) dest, *s = (char *) src;
+
+ while (count--)
+ *tmp++ = *s++;
+
+ return dest;
+}
+
+
+int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
+{
+ startblock += part_offset;
+ if (cur_dev == NULL)
+ return -1;
+ if (cur_dev->block_read) {
+ return cur_dev->block_read (cur_dev->dev, startblock, getsize, (unsigned long *)bufptr);
+ }
+ return -1;
+}
+
+
+int
+fat_register_device(block_dev_desc_t *dev_desc, int part_no)
+{
+ unsigned char buffer[SECTOR_SIZE];
+
+ if (!dev_desc->block_read)
+ return -1;
+ cur_dev=dev_desc;
+ /* check if we have a MBR (on floppies we have only a PBR) */
+ if (dev_desc->block_read (dev_desc->dev, 0, 1, (ulong *) buffer) != 1) {
+ printf ("** Can't read from device %d **\n", dev_desc->dev);
+ return -1;
+ }
+ if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
+ buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
+ /* no signature found */
+ return -1;
+ }
+ if(!strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET],"FAT",3)) {
+ /* ok, we assume we are on a PBR only */
+ cur_part = 1;
+ part_offset=0;
+ }
+ else {
+#if (CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI) || \
+ (CONFIG_COMMANDS & CFG_CMD_USB) || (CONFIG_COMMANDS & CFG_CMD_MMC) || defined(CONFIG_SYSTEMACE)
+ disk_partition_t info;
+ if(!get_partition_info(dev_desc, part_no, &info)) {
+ part_offset = info.start;
+ cur_part = part_no;
+ }
+ else {
+ printf ("** Partition %d not valid on device %d **\n",part_no,dev_desc->dev);
+ return -1;
+ }
+#else
+ /* FIXME we need to determine the start block of the
+ * partition where the DOS FS resides. This can be done
+ * by using the get_partition_info routine. For this
+ * purpose the libpart must be included.
+ */
+ part_offset=63;
+ //part_offset=0;
+ cur_part = 1;
+#endif
+ }
+ return 0;
+}
+
+
+/*
+ * Get the first occurence of a directory delimiter ('/' or '\') in a string.
+ * Return index into string if found, -1 otherwise.
+ */
+static int
+dirdelim(char *str)
+{
+ char *start = str;
+
+ while (*str != '\0') {
+ if (ISDIRDELIM(*str)) return str - start;
+ str++;
+ }
+ return -1;
+}
+
+
+/*
+ * Match volume_info fs_type strings.
+ * Return 0 on match, -1 otherwise.
+ */
+static int
+compare_sign(char *str1, char *str2)
+{
+ char *end = str1+SIGNLEN;
+
+ while (str1 != end) {
+ if (*str1 != *str2) {
+ return -1;
+ }
+ str1++;
+ str2++;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Extract zero terminated short name from a directory entry.
+ */
+static void get_name (dir_entry *dirent, char *s_name)
+{
+ char *ptr;
+
+ memcpy (s_name, dirent->name, 8);
+ s_name[8] = '\0';
+ ptr = s_name;
+ while (*ptr && *ptr != ' ')
+ ptr++;
+ if (dirent->ext[0] && dirent->ext[0] != ' ') {
+ *ptr = '.';
+ ptr++;
+ memcpy (ptr, dirent->ext, 3);
+ ptr[3] = '\0';
+ while (*ptr && *ptr != ' ')
+ ptr++;
+ }
+ *ptr = '\0';
+ if (*s_name == DELETED_FLAG)
+ *s_name = '\0';
+ else if (*s_name == aRING)
+ *s_name = 'å';
+ downcase (s_name);
+}
+
+/*
+ * Get the entry at index 'entry' in a FAT (12/16/32) table.
+ * On failure 0x00 is returned.
+ */
+static __u32
+get_fatent(fsdata *mydata, __u32 entry)
+{
+ __u32 bufnum;
+ __u32 offset;
+ __u32 ret = 0x00;
+
+ switch (mydata->fatsize) {
+ case 32:
+ bufnum = entry / FAT32BUFSIZE;
+ offset = entry - bufnum * FAT32BUFSIZE;
+ break;
+ case 16:
+ bufnum = entry / FAT16BUFSIZE;
+ offset = entry - bufnum * FAT16BUFSIZE;
+ break;
+ case 12:
+ bufnum = entry / FAT12BUFSIZE;
+ offset = entry - bufnum * FAT12BUFSIZE;
+ break;
+
+ default:
+ /* Unsupported FAT size */
+ return ret;
+ }
+ /* Read a new block of FAT entries into the cache. */
+ if (bufnum != mydata->fatbufnum) {
+ int getsize = FATBUFSIZE/FS_BLOCK_SIZE;
+ __u8 *bufptr = mydata->fatbuf;
+ __u32 fatlength = mydata->fatlength;
+ __u32 startblock = bufnum * FATBUFBLOCKS;
+ unsigned long i;
+
+ fatlength *= SECTOR_SIZE; /* We want it in bytes now */
+ startblock += mydata->fat_sect; /* Offset from start of disk */
+
+ if (getsize > fatlength) getsize = fatlength;
+ if (disk_read(startblock, getsize, bufptr) < 0) {
+ FAT_DPRINT("Error reading FAT blocks\n");
+ return ret;
+ }
+ mydata->fatbufnum = bufnum;
+ }
+
+ /* Get the actual entry from the table */
+ switch (mydata->fatsize) {
+ case 32:
+ ret = FAT2CPU32(((__u32*)mydata->fatbuf)[offset]);
+ break;
+ case 16:
+ ret = FAT2CPU16(((__u16*)mydata->fatbuf)[offset]);
+ break;
+ case 12: {
+ __u32 off16 = (offset*3)/4;
+ __u16 val1, val2;
+
+ switch (offset & 0x3) {
+ case 0:
+ ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);
+ ret &= 0xfff;
+ break;
+ case 1:
+ val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);
+ val1 &= 0xf000;
+ val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]);
+ val2 &= 0x00ff;
+ ret = (val2 << 4) | (val1 >> 12);
+ break;
+ case 2:
+ val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);
+ val1 &= 0xff00;
+ val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]);
+ val2 &= 0x000f;
+ ret = (val2 << 8) | (val1 >> 8);
+ break;
+ case 3:
+ ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);;
+ ret = (ret & 0xfff0) >> 4;
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ }
+ FAT_DPRINT("ret: %d, offset: %d\n", ret, offset);
+
+ return ret;
+}
+
+
+/*
+ * Read at most 'size' bytes from the specified cluster into 'buffer'.
+ * Return 0 on success, -1 otherwise.
+ */
+static int
+get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
+{
+ int idx = 0;
+ __u32 startsect;
+
+ if (clustnum > 0) {
+ startsect = mydata->data_begin + clustnum*mydata->clust_size;
+ } else {
+ startsect = mydata->rootdir_sect;
+ }
+
+ if (disk_read(startsect, size/FS_BLOCK_SIZE , buffer) < 0) {
+ FAT_DPRINT("Error reading data\n");
+ return -1;
+ }
+ if(size % FS_BLOCK_SIZE) {
+ __u8 tmpbuf[FS_BLOCK_SIZE];
+ idx= size/FS_BLOCK_SIZE;
+ if (disk_read(startsect + idx, 1, tmpbuf) < 0) {
+ FAT_DPRINT("Error reading data\n");
+ return -1;
+ }
+ buffer += idx*FS_BLOCK_SIZE;
+
+ memcpy(buffer, tmpbuf, size % FS_BLOCK_SIZE);
+ return 0;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Read at most 'maxsize' bytes from the file associated with 'dentptr'
+ * into 'buffer'.
+ * Return the number of bytes read or -1 on fatal errors.
+ */
+static long
+get_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
+ unsigned long maxsize)
+{
+ unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
+ unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE;
+ __u32 curclust = START(dentptr);
+ __u32 endclust, newclust;
+ unsigned long actsize;
+
+ FAT_DPRINT("Filesize: %ld bytes\n", filesize);
+
+ if (maxsize > 0 && filesize > maxsize) filesize = maxsize;
+
+ FAT_DPRINT("Reading: %ld bytes\n", filesize);
+
+ actsize=bytesperclust;
+ endclust=curclust;
+ do {
+ /* search for consecutive clusters */
+ while(actsize < filesize) {
+ newclust = get_fatent(mydata, endclust);
+ if((newclust -1)!=endclust)
+ goto getit;
+ if (newclust <= 0x0001 || newclust >= 0xfff0) {
+ FAT_DPRINT("curclust: 0x%x\n", newclust);
+ FAT_DPRINT("Invalid FAT entry\n");
+ return gotsize;
+ }
+ endclust=newclust;
+ actsize+= bytesperclust;
+ }
+ /* actsize >= file size */
+ actsize -= bytesperclust;
+ /* get remaining clusters */
+ if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
+ FAT_ERROR("Error reading cluster\n");
+ return -1;
+ }
+ /* get remaining bytes */
+ gotsize += (int)actsize;
+ filesize -= actsize;
+ buffer += actsize;
+ actsize= filesize;
+ if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
+ FAT_ERROR("Error reading cluster\n");
+ return -1;
+ }
+ gotsize+=actsize;
+ return gotsize;
+getit:
+ if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
+ FAT_ERROR("Error reading cluster\n");
+ return -1;
+ }
+ gotsize += (int)actsize;
+ filesize -= actsize;
+ buffer += actsize;
+ curclust = get_fatent(mydata, endclust);
+ if (curclust <= 0x0001 || curclust >= 0xfff0) {
+ FAT_DPRINT("curclust: 0x%x\n", curclust);
+ FAT_ERROR("Invalid FAT entry\n");
+ return gotsize;
+ }
+ actsize=bytesperclust;
+ endclust=curclust;
+ } while (1);
+}
+
+
+#ifdef CONFIG_SUPPORT_VFAT
+/*
+ * Extract the file name information from 'slotptr' into 'l_name',
+ * starting at l_name[*idx].
+ * Return 1 if terminator (zero byte) is found, 0 otherwise.
+ */
+static int
+slot2str(dir_slot *slotptr, char *l_name, int *idx)
+{
+ int j;
+
+ for (j = 0; j <= 8; j += 2) {
+ l_name[*idx] = slotptr->name0_4[j];
+ if (l_name[*idx] == 0x00) return 1;
+ (*idx)++;
+ }
+ for (j = 0; j <= 10; j += 2) {
+ l_name[*idx] = slotptr->name5_10[j];
+ if (l_name[*idx] == 0x00) return 1;
+ (*idx)++;
+ }
+ for (j = 0; j <= 2; j += 2) {
+ l_name[*idx] = slotptr->name11_12[j];
+ if (l_name[*idx] == 0x00) return 1;
+ (*idx)++;
+ }
+
+ return 0;
+}
+
+/* Calculate short name checksum */
+static __u8
+mkcksum(const char *str)
+{
+ int i;
+ __u8 ret = 0;
+
+ for (i = 0; i < 11; i++) {
+ ret = (((ret&1)<<7)|((ret&0xfe)>>1)) + str[i];
+ }
+
+ return ret;
+}
+#endif
+
+
+/*
+ * Get the directory entry associated with 'filename' from the directory
+ * starting at 'startsect'
+ */
+
+
+static dir_entry *get_dentfromdir (fsdata * mydata, int startsect,
+ char *filename, dir_entry * retdent,
+ int dols)
+{
+
+}
+
+#if 0
+__u8 get_dentfromdir_block[MAX_CLUSTSIZE];
+static dir_entry *get_dentfromdir (fsdata * mydata, int startsect,
+ char *filename, dir_entry * retdent,
+ int dols)
+{
+ __u16 prevcksum = 0xffff;
+ __u32 curclust = START (retdent);
+ int files = 0, dirs = 0;
+
+ while (1) {
+ dir_entry *dentptr;
+ int i;
+
+ if (get_cluster (mydata, curclust, get_dentfromdir_block,
+ mydata->clust_size * SECTOR_SIZE) != 0) {
+ FAT_DPRINT ("Error: reading directory block\n");
+ return NULL;
+ }
+ dentptr = (dir_entry *) get_dentfromdir_block;
+ for (i = 0; i < DIRENTSPERCLUST; i++) {
+ char s_name[14], l_name[256];
+
+ l_name[0] = '\0';
+ if (dentptr->name[0] == DELETED_FLAG) {
+ dentptr++;
+ continue;
+ }
+ if ((dentptr->attr & ATTR_VOLUME)) {
+ /* Volume label or VFAT entry */
+ dentptr++;
+ continue;
+ }
+ if (dentptr->name[0] == 0) {
+ if (dols) {
+ printf ("\n%d file(s), %d dir(s)\n\n", files, dirs);
+ }
+ FAT_DPRINT ("Dentname == NULL - %d\n", i);
+ return NULL;
+ }
+#ifdef CONFIG_SUPPORT_VFAT
+ if (dols && mkcksum (dentptr->name) == prevcksum) {
+ dentptr++;
+ continue;
+ }
+#endif
+ get_name (dentptr, s_name);
+ if (dols) {
+ int isdir = (dentptr->attr & ATTR_DIR);
+ char dirc;
+ int doit = 0;
+
+ if (isdir) {
+ dirs++;
+ dirc = '/';
+ doit = 1;
+ } else {
+ dirc = ' ';
+ if (s_name[0] != 0) {
+ files++;
+ doit = 1;
+ }
+ }
+ if (doit) {
+ if (dirc == ' ') {
+ printf (" %8ld %s%c\n",
+ (long) FAT2CPU32 (dentptr->size), s_name,
+ dirc);
+ } else {
+ printf (" %s%c\n", s_name, dirc);
+ }
+ }
+ dentptr++;
+ continue;
+ }
+ if (strcmp (filename, s_name) && strcmp (filename, l_name)) {
+ FAT_DPRINT ("Mismatch: |%s|%s|\n", s_name, l_name);
+ dentptr++;
+ continue;
+ }
+ memcpy (retdent, dentptr, sizeof (dir_entry));
+
+ FAT_DPRINT ("DentName: %s", s_name);
+ FAT_DPRINT (", start: 0x%x", START (dentptr));
+ FAT_DPRINT (", size: 0x%x %s\n",
+ FAT2CPU32 (dentptr->size),
+ (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
+
+ return retdent;
+ }
+ curclust = get_fatent (mydata, curclust);
+ if (curclust <= 0x0001 || curclust >= 0xfff0) {
+ FAT_DPRINT ("curclust: 0x%x\n", curclust);
+ FAT_ERROR ("Invalid FAT entry\n");
+ return NULL;
+ }
+ }
+
+ return NULL;
+}
+#endif
+
+
+/*
+ * Read boot sector and volume info from a FAT filesystem
+ */
+static int
+read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize)
+{
+ __u8 block[FS_BLOCK_SIZE];
+ volume_info *vistart;
+
+ printf("Reading boot sector\n");
+
+ if (disk_read(0, 1, block) < 0) {
+ FAT_DPRINT("Error: reading block\n");
+ return -1;
+ }
+
+ memcpy(bs, block, sizeof(boot_sector));
+ bs->reserved = FAT2CPU16(bs->reserved);
+ bs->fat_length = FAT2CPU16(bs->fat_length);
+ bs->secs_track = FAT2CPU16(bs->secs_track);
+ bs->heads = FAT2CPU16(bs->heads);
+#if 0 /* UNUSED */
+ bs->hidden = FAT2CPU32(bs->hidden);
+#endif
+ bs->total_sect = FAT2CPU32(bs->total_sect);
+
+ /* FAT32 entries */
+ if (bs->fat_length == 0) {
+ /* Assume FAT32 */
+ bs->fat32_length = FAT2CPU32(bs->fat32_length);
+ bs->flags = FAT2CPU16(bs->flags);
+ bs->root_cluster = FAT2CPU32(bs->root_cluster);
+ bs->info_sector = FAT2CPU16(bs->info_sector);
+ bs->backup_boot = FAT2CPU16(bs->backup_boot);
+ vistart = (volume_info*) (block + sizeof(boot_sector));
+ *fatsize = 32;
+ } else {
+ vistart = (volume_info*) &(bs->fat32_length);
+ *fatsize = 0;
+ }
+ memcpy(volinfo, vistart, sizeof(volume_info));
+
+ /* Terminate fs_type string. Writing past the end of vistart
+ is ok - it's just the buffer. */
+ vistart->fs_type[8] = '\0';
+
+ if (*fatsize == 32) {
+ if (compare_sign(FAT32_SIGN, vistart->fs_type) == 0) {
+ return 0;
+ }
+ } else {
+ if (compare_sign(FAT12_SIGN, vistart->fs_type) == 0) {
+ *fatsize = 12;
+ return 0;
+ }
+ if (compare_sign(FAT16_SIGN, vistart->fs_type) == 0) {
+ *fatsize = 16;
+ return 0;
+ }
+ }
+
+ FAT_DPRINT("Error: broken fs_type sign\n");
+ return -1;
+}
+
+#if 0
+__u8 do_fat_read_block[MAX_CLUSTSIZE]; /* Block buffer */
+#endif
+
+__u8 *fnamecopy = 0x80500000;
+__u8 *do_fat_read_block = 0x80500880;
+
+boot_sector bs;
+volume_info volinfo;
+fsdata datablock;
+
+long
+do_fat_read(const char *filename, void *buffer, unsigned long maxsize,
+ int dols)
+{
+#if CONFIG_NIOS /* NIOS CPU cannot access big automatic arrays */
+ static
+#endif
+ fsdata *mydata = &datablock;
+ dir_entry *dentptr;
+ __u16 prevcksum = 0xffff;
+ char *subname = "";
+ int rootdir_size, cursect;
+ int idx, isdir = 0;
+ int files = 0, dirs = 0;
+ long ret = 0;
+ int firsttime;
+
+ if (read_bootsectandvi (&bs, &volinfo, &mydata->fatsize)) {
+ printf ("Error: reading boot sector\n");
+ return -1;
+ }
+ if (mydata->fatsize == 32) {
+ mydata->fatlength = bs.fat32_length;
+ } else {
+ mydata->fatlength = bs.fat_length;
+ }
+ mydata->fat_sect = bs.reserved;
+ cursect = mydata->rootdir_sect
+ = mydata->fat_sect + mydata->fatlength * bs.fats;
+ mydata->clust_size = bs.cluster_size;
+ if (mydata->fatsize == 32) {
+ rootdir_size = mydata->clust_size;
+ mydata->data_begin = mydata->rootdir_sect /* + rootdir_size */
+ - (mydata->clust_size * 2);
+ } else {
+ rootdir_size = ((bs.dir_entries[1] * (int) 256 + bs.dir_entries[0])
+ * sizeof (dir_entry)) / SECTOR_SIZE;
+ mydata->data_begin = mydata->rootdir_sect + rootdir_size
+ - (mydata->clust_size * 2);
+ }
+ mydata->fatbufnum = -1;
+
+ FAT_DPRINT ("FAT%d, fatlength: %d\n", mydata->fatsize,
+ mydata->fatlength);
+ FAT_DPRINT ("Rootdir begins at sector: %d, offset: %x, size: %d\n"
+ "Data begins at: %d\n",
+ mydata->rootdir_sect, mydata->rootdir_sect * SECTOR_SIZE,
+ rootdir_size, mydata->data_begin);
+ FAT_DPRINT ("Cluster size: %d\n", mydata->clust_size);
+
+ /* "cwd" is always the root... */
+ while (ISDIRDELIM (*filename))
+ filename++;
+ /* Make a copy of the filename and convert it to lowercase */
+ strcpy (fnamecopy, filename);
+ downcase (fnamecopy);
+ if (*fnamecopy == '\0') {
+ if (!dols){
+ printf("\n not there\n");
+ return -1;
+ }
+ dols = LS_ROOT;
+ } else if ((idx = dirdelim (fnamecopy)) >= 0) {
+ isdir = 1;
+ fnamecopy[idx] = '\0';
+ subname = fnamecopy + idx + 1;
+ /* Handle multiple delimiters */
+ while (ISDIRDELIM (*subname))
+ subname++;
+ } else if (dols) {
+ isdir = 1;
+ }
+
+ while (1) {
+ int i;
+
+ if (disk_read (cursect, mydata->clust_size, do_fat_read_block) < 0) {
+ printf ("Error: reading rootdir block\n");
+ return -1;
+ }
+ dentptr = (dir_entry *) do_fat_read_block;
+ for (i = 0; i < DIRENTSPERBLOCK; i++) {
+ char s_name[14], l_name[256];
+
+ l_name[0] = '\0';
+ if ((dentptr->attr & ATTR_VOLUME)) {
+ /* Volume label or VFAT entry */
+ dentptr++;
+ continue;
+ } else if (dentptr->name[0] == 0) {
+ FAT_DPRINT ("RootDentname == NULL - %d\n", i);
+ if (dols == LS_ROOT) {
+ printf ("\n%d file(s), %d dir(s)\n\n", files, dirs);
+ return 0;
+ }
+ return -1;
+ }
+#ifdef CONFIG_SUPPORT_VFAT
+ else if (dols == LS_ROOT
+ && mkcksum (dentptr->name) == prevcksum) {
+ dentptr++;
+ continue;
+ }
+#endif
+ get_name (dentptr, s_name);
+ if (dols == LS_ROOT) {
+ int isdir = (dentptr->attr & ATTR_DIR);
+ char dirc;
+ int doit = 0;
+
+ if (isdir) {
+ dirc = '/';
+ if (s_name[0] != 0) {
+ dirs++;
+ doit = 1;
+ }
+ } else {
+ dirc = ' ';
+ if (s_name[0] != 0) {
+ files++;
+ doit = 1;
+ }
+ }
+ if (doit) {
+ if (dirc == ' ') {
+ printf (" %8ld %s%c\n",
+ (long) FAT2CPU32 (dentptr->size), s_name,
+ dirc);
+ } else {
+ printf (" %s%c\n", s_name, dirc);
+ }
+ }
+ dentptr++;
+ continue;
+ }
+ if (strcmp (fnamecopy, s_name) && strcmp (fnamecopy, l_name)) {
+ FAT_DPRINT ("RootMismatch: |%s|%s|\n", s_name, l_name);
+ dentptr++;
+ continue;
+ }
+ if (isdir && !(dentptr->attr & ATTR_DIR))
+ return -1;
+
+ FAT_DPRINT ("RootName: %s", s_name);
+ FAT_DPRINT (", start: 0x%x", START (dentptr));
+ FAT_DPRINT (", size: 0x%x %s\n",
+ FAT2CPU32 (dentptr->size), isdir ? "(DIR)" : "");
+
+ goto rootdir_done; /* We got a match */
+ }
+ cursect++;
+ }
+ rootdir_done:
+
+ firsttime = 1;
+ while (isdir) {
+ int startsect = mydata->data_begin
+ + START (dentptr) * mydata->clust_size;
+ dir_entry dent;
+ char *nextname = NULL;
+
+ dent = *dentptr;
+ dentptr = &dent;
+ idx = dirdelim (subname);
+ if (idx >= 0) {
+ subname[idx] = '\0';
+ nextname = subname + idx + 1;
+ /* Handle multiple delimiters */
+ while (ISDIRDELIM (*nextname))
+ nextname++;
+ if (dols && *nextname == '\0')
+ firsttime = 0;
+ } else {
+ if (dols && firsttime) {
+ firsttime = 0;
+ } else {
+ isdir = 0;
+ }
+ }
+
+ if (get_dentfromdir (mydata, startsect, subname, dentptr,
+ isdir ? 0 : dols) == NULL) {
+ if (dols && !isdir)
+ return 0;
+ return -1;
+ }
+
+ if (idx >= 0) {
+ if (!(dentptr->attr & ATTR_DIR))
+ return -1;
+ subname = nextname;
+ }
+ }
+ ret = get_contents (mydata, dentptr, buffer, maxsize);
+ FAT_DPRINT ("Size: %d, got: %ld\n", FAT2CPU32 (dentptr->size), ret);
+
+ return ret;
+}
+
+
+int
+file_fat_detectfs(void)
+{
+ boot_sector bs;
+ volume_info volinfo;
+ int fatsize;
+ char vol_label[12];
+
+ if(cur_dev==NULL) {
+ printf("No current device\n");
+ return 1;
+ }
+#if (CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI) || \
+ (CONFIG_COMMANDS & CFG_CMD_USB) || (CONFIG_MMC)
+ printf("Interface: ");
+ switch(cur_dev->if_type) {
+ case IF_TYPE_IDE : printf("IDE"); break;
+ case IF_TYPE_SCSI : printf("SCSI"); break;
+ case IF_TYPE_ATAPI : printf("ATAPI"); break;
+ case IF_TYPE_USB : printf("USB"); break;
+ case IF_TYPE_DOC : printf("DOC"); break;
+ case IF_TYPE_MMC : printf("MMC"); break;
+ default : printf("Unknown");
+ }
+ printf("\n Device %d: ",cur_dev->dev);
+ dev_print(cur_dev);
+#endif
+ if(read_bootsectandvi(&bs, &volinfo, &fatsize)) {
+ printf("\nNo valid FAT fs found\n");
+ return 1;
+ }
+ memcpy (vol_label, volinfo.volume_label, 11);
+ vol_label[11] = '\0';
+ volinfo.fs_type[5]='\0';
+ printf("Partition %d: Filesystem: %s \"%s\"\n",cur_part,volinfo.fs_type,vol_label);
+ return 0;
+}
+
+
+int
+file_fat_ls(const char *dir)
+{
+ return do_fat_read(dir, NULL, 0, LS_YES);
+}
+
+
+long
+file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
+{
+ long ret;
+ ret = do_fat_read(filename, buffer, maxsize, LS_NO);
+ return ret;
+}
+
+#endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */
generated by cgit v1.1 at 2024-12-22 10:04:20 +0000