diff options
Diffstat (limited to 'target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c')
| -rw-r--r-- | target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c b/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c index 3ceec403cf..61605d3f4a 100644 --- a/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c +++ b/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c @@ -222,6 +222,37 @@ static int erase_write (struct mtd_info *mtd, unsigned long pos, } +static int __init +find_dual_image_off (struct mtd_info *mtd, size_t size) +{ + struct trx_header trx; + int off, blocksize; + size_t len; + + blocksize = mtd->erasesize; + if (blocksize < 0x10000) + blocksize = 0x10000; + + for (off = (128*1024); off < size; off += blocksize) { + memset(&trx, 0xe5, sizeof(trx)); + /* + * Read into buffer + */ + if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) || + len != sizeof(trx)) + continue; + /* found last TRX header */ + if (le32_to_cpu(trx.magic) == TRX_MAGIC){ + if (le32_to_cpu(trx.flag_version >> 16)==2){ + printk("dual image TRX header found\n"); + return size/2; + } else { + return 0; + } + } + } + return 0; +} static int __init @@ -232,7 +263,6 @@ find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part) int off, blocksize; u32 i, crc = ~0; size_t len; - struct squashfs_super_block *sb = (struct squashfs_super_block *) buf; blocksize = mtd->erasesize; if (blocksize < 0x10000) @@ -318,6 +348,7 @@ struct mtd_partition * __init init_mtd_partitions(struct mtd_info *mtd, size_t size) { int cfe_size; + int dual_image_offset = 0; if ((cfe_size = find_cfe_size(mtd,size)) < 0) return NULL; @@ -336,10 +367,13 @@ init_mtd_partitions(struct mtd_info *mtd, size_t size) bcm47xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); } + /* dual image offset*/ + printk("Looking for dual image\n"); + dual_image_offset=find_dual_image_off(mtd,size); /* linux (kernel and rootfs) */ if (cfe_size != 384 * 1024) { bcm47xx_parts[1].offset = bcm47xx_parts[0].size; - bcm47xx_parts[1].size = bcm47xx_parts[3].offset - + bcm47xx_parts[1].size = bcm47xx_parts[3].offset - dual_image_offset - bcm47xx_parts[1].offset; } else { /* do not count the elf loader, which is on one block */ @@ -353,7 +387,7 @@ init_mtd_partitions(struct mtd_info *mtd, size_t size) /* find and size rootfs */ find_root(mtd,size,&bcm47xx_parts[2]); - bcm47xx_parts[2].size = size - bcm47xx_parts[2].offset - bcm47xx_parts[3].size; + bcm47xx_parts[2].size = size - dual_image_offset - bcm47xx_parts[2].offset - bcm47xx_parts[3].size; return bcm47xx_parts; } |