-static int ext4_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;
-
- /* 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;
- }
-
- /* First we assume there is a MBR */
- if (!get_partition_info(dev_desc, part_no, &info)) {
- part_offset = info.start;
- cur_part = part_no;
- part_size = info.size;
- } else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET],
- "FAT", 3) == 0) || (strncmp((char *)&buffer
- [DOS_FS32_TYPE_OFFSET],
- "FAT32", 5) == 0)) {
- /* 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;
- }
-
- return 0;
-}
-