FAT: implement fat_set_blk_dev(), convert cmd_fat.c

This makes the FAT filesystem API more consistent with other block-based
filesystems. If in the future standard multi-filesystem commands such as
"ls" or "load" are implemented, having FAT work the same way as other
filesystems will be necessary.

Convert cmd_fat.c to the new API, so the code looks more like other files
implementing the same commands for other filesystems.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>

diff --git a/common/cmd_fat.c b/common/cmd_fat.c
index 5a5698b..c38302d 100644 (file)
--- a/common/cmd_fat.c
+++ b/common/cmd_fat.c
@@ -55,7 +55,7 @@ int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                return 1;
 
        dev = dev_desc->dev;
-       if (fat_register_device(dev_desc,part)!=0) {
+       if (fat_set_blk_dev(dev_desc, &info) != 0) {
                printf("\n** Unable to use %s %d:%d for fatload **\n",
                        argv[1], dev, part);
                return 1;
@@ -111,7 +111,7 @@ int do_fat_ls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                return 1;
 
        dev = dev_desc->dev;
-       if (fat_register_device(dev_desc,part)!=0) {
+       if (fat_set_blk_dev(dev_desc, &info) != 0) {
                printf("\n** Unable to use %s %d:%d for fatls **\n",
                        argv[1], dev, part);
                return 1;
@@ -149,7 +149,7 @@ int do_fat_fsinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                return 1;
 
        dev = dev_desc->dev;
-       if (fat_register_device(dev_desc,part)!=0) {
+       if (fat_set_blk_dev(dev_desc, &info) != 0) {
                printf("\n** Unable to use %s %d:%d for fatinfo **\n",
                        argv[1], dev, part);
                return 1;
@@ -185,7 +185,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
 
        dev = dev_desc->dev;
 
-       if (fat_register_device(dev_desc, part) != 0) {
+       if (fat_set_blk_dev(dev_desc, &info) != 0) {
                printf("\n** Unable to use %s %d:%d for fatwrite **\n",
                        argv[1], dev, part);
                return 1;

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 31042e5..393c378 100644 (file)
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -61,44 +61,12 @@ static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
                        cur_part_info.start + block, nr_blocks, buf);
 }
 
-int fat_register_device(block_dev_desc_t * dev_desc, int part_no)
+int fat_set_blk_dev(block_dev_desc_t *dev_desc, disk_partition_t *info)
 {
        ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 
-       /* First close any currently found FAT filesystem */
-       cur_dev = NULL;
-
-#if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_SATA) || \
-     defined(CONFIG_CMD_SCSI) || \
-     defined(CONFIG_CMD_USB) || \
-     defined(CONFIG_MMC) || \
-     defined(CONFIG_SYSTEMACE) )
-
-       /* Read the partition table, if present */
-       if (!get_partition_info(dev_desc, part_no, &cur_part_info))
-               cur_dev = dev_desc;
-#endif
-
-       /* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
-       if (!cur_dev) {
-               if (part_no != 0) {
-                       printf("** Partition %d not valid on device %d **\n",
-                                       part_no, dev_desc->dev);
-                       return -1;
-               }
-
-               cur_dev = dev_desc;
-               cur_part_info.start = 0;
-               cur_part_info.size = dev_desc->lba;
-               cur_part_info.blksz = dev_desc->blksz;
-               cur_part_info.name[0] = 0;
-               cur_part_info.type[0] = 0;
-               cur_part_info.bootable = 0;
-#ifdef CONFIG_PARTITION_UUIDS
-               cur_part_info.uuid[0] = 0;
-#endif
-       }
+       cur_dev = dev_desc;
+       cur_part_info = *info;
 
        /* Make sure it has a valid FAT header */
        if (disk_read(0, 1, buffer) != 1) {
@@ -122,6 +90,34 @@ int fat_register_device(block_dev_desc_t * dev_desc, int part_no)
        return -1;
 }
 
+int fat_register_device(block_dev_desc_t *dev_desc, int part_no)
+{
+       disk_partition_t info;
+
+       /* First close any currently found FAT filesystem */
+       cur_dev = NULL;
+
+       /* Read the partition table, if present */
+       if (get_partition_info(dev_desc, part_no, &info)) {
+               if (part_no != 0) {
+                       printf("** Partition %d not valid on device %d **\n",
+                                       part_no, dev_desc->dev);
+                       return -1;
+               }
+
+               info.start = 0;
+               info.size = dev_desc->lba;
+               info.blksz = dev_desc->blksz;
+               info.name[0] = 0;
+               info.type[0] = 0;
+               info.bootable = 0;
+#ifdef CONFIG_PARTITION_UUIDS
+               info.uuid[0] = 0;
+#endif
+       }
+
+       return fat_set_blk_dev(dev_desc, &info);
+}
 
 /*
  * Get the first occurence of a directory delimiter ('/' or '\') in a string.

diff --git a/include/fat.h b/include/fat.h
index cc85b06..706cd7a 100644 (file)
--- a/include/fat.h
+++ b/include/fat.h
@@ -212,6 +212,7 @@ long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
                      unsigned long maxsize);
 long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
 const char *file_getfsname(int idx);
+int fat_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
 int fat_register_device(block_dev_desc_t *dev_desc, int part_no);
 
 int file_fat_write(const char *filename, void *buffer, unsigned long maxsize);