summaryrefslogtreecommitdiff
path: root/fs/fat/fat.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/fat/fat.c')
-rw-r--r--[-rwxr-xr-x]fs/fat/fat.c57
1 files changed, 35 insertions, 22 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 3007608..e98e50a 100755..100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -31,7 +31,7 @@
#include <asm/byteorder.h>
#include <part.h>
-#if (CONFIG_COMMANDS & CFG_CMD_FAT)
+#if defined(CONFIG_CMD_FAT)
/*
* Convert a string to lowercase.
@@ -70,10 +70,11 @@ int
fat_register_device(block_dev_desc_t *dev_desc, int part_no)
{
unsigned char buffer[SECTOR_SIZE];
+ disk_partition_t info;
if (!dev_desc->block_read)
return -1;
- cur_dev=dev_desc;
+ 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);
@@ -88,30 +89,40 @@ fat_register_device(block_dev_desc_t *dev_desc, int part_no)
/* 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) || \
+ } else {
+#if (defined(CONFIG_CMD_IDE) || \
+ defined(CONFIG_CMD_SCSI) || \
+ defined(CONFIG_CMD_USB) || \
(defined(CONFIG_MMC) && defined(CONFIG_LPC2292)) || \
defined(CONFIG_SYSTEMACE) )
- disk_partition_t info;
- if(!get_partition_info(dev_desc, part_no, &info)) {
+ /* First we assume, there is a MBR */
+ 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);
+ } else 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 {
+ 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=32;
- cur_part = 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;
+ info.start = part_offset;
+ } 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 = 32;
+ cur_part = 1;
+ }
#endif
}
return 0;
@@ -975,8 +986,10 @@ file_fat_detectfs(void)
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)
+#if defined(CONFIG_CMD_IDE) || \
+ defined(CONFIG_CMD_SCSI) || \
+ defined(CONFIG_CMD_USB) || \
+ (CONFIG_MMC)
printf("Interface: ");
switch(cur_dev->if_type) {
case IF_TYPE_IDE : printf("IDE"); break;
@@ -1017,4 +1030,4 @@ file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
return do_fat_read(filename, buffer, maxsize, LS_NO);
}
-#endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */
+#endif