X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/d92ab4b98c9d797587af5c81c3ffa6fbe15d206c..e1d447b01722ddc24f570134664ddcd0f1a230eb:/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c?ds=sidebyside diff --git a/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c b/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c index 0ae96a305..587bb31bb 100644 --- a/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c +++ b/target/linux/ar7-2.6/files/drivers/mtd/ar7part.c @@ -29,7 +29,6 @@ #include #include #include -#include struct ar7_bin_rec { unsigned int checksum; @@ -43,85 +42,84 @@ static int create_mtd_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long origin) { - char sig[8]; struct ar7_bin_rec header; - unsigned int offset, new_offset, len; - struct squashfs_super_block sb; - unsigned int block_size = 0x10000, pre_size = 0x10000, - post_size = 0, root_offset = 0xe0000; - unsigned int p = 3; + unsigned int offset, len; + unsigned int pre_size = master->erasesize, post_size = 0, + root_offset = 0xe0000; + int retries = 10; printk("Parsing AR7 partition map...\n"); ar7_parts[0].name = "loader"; ar7_parts[0].offset = 0; - ar7_parts[0].size = block_size; + ar7_parts[0].size = master->erasesize; ar7_parts[0].mask_flags = MTD_WRITEABLE; ar7_parts[1].name = "config"; - ar7_parts[1].size = block_size; + ar7_parts[1].offset = 0; + ar7_parts[1].size = master->erasesize; ar7_parts[1].mask_flags = 0; - master->read(master, block_size, 8, &len, sig); - if (strncmp(sig, "TIENV0.8", 8)) { - ar7_parts[1].offset = master->size - block_size; - post_size = block_size; - } else { - ar7_parts[1].offset = block_size; - pre_size = block_size * 2; + do { + offset = pre_size; + master->read(master, offset, sizeof(header), &len, (u_char *)&header); + if (!strncmp((char *)&header, "TIENV0.8", 8)) + ar7_parts[1].offset = pre_size; + if (header.checksum == 0xfeedfa42) + break; + if (header.checksum == 0xfeed1281) + break; + pre_size += master->erasesize; + } while (retries--); + + pre_size = offset; + + if (!ar7_parts[1].offset) { + ar7_parts[1].offset = master->size - master->erasesize; + post_size = master->erasesize; } - ar7_parts[2].name = "linux"; - ar7_parts[2].offset = pre_size; - ar7_parts[2].size = master->size - block_size * 2; - ar7_parts[2].mask_flags = 0; - - offset = pre_size; - master->read(master, offset, sizeof(header), &len, (u_char *)&header); - if (header.checksum != 0xfeedfa42) { - printk("Unknown magic: %08x\n", header.checksum); - } else { + switch (header.checksum) { + case 0xfeedfa42: while (header.length) { offset += sizeof(header) + header.length; master->read(master, offset, sizeof(header), &len, (u_char *)&header); } root_offset = offset + sizeof(header) + 4; + break; + case 0xfeed1281: + while (header.length) { + offset += sizeof(header) + header.length; + master->read(master, offset, sizeof(header), + &len, (u_char *)&header); + } + root_offset = offset + sizeof(header) + 4 + 0xff; + root_offset &= ~(u32)0xff; + break; + default: + printk("Unknown magic: %08x\n", header.checksum); + break; } - - ar7_parts[p].name = "rootfs"; - ar7_parts[p].offset = root_offset; - ar7_parts[p].size = master->size - root_offset - post_size; - ar7_parts[p++].mask_flags = 0; - - master->read(master, root_offset, sizeof(sb), &len, (u_char *)&sb); - if (sb.s_magic == SQUASHFS_MAGIC) { - printk("Squashfs detected (size %Ld)\n", sb.bytes_used); - new_offset = root_offset + sb.bytes_used; - - if ((new_offset % master->erasesize) > 0) - new_offset += master->erasesize - - (new_offset % master->erasesize); - - ar7_parts[p].name = "rootfs_data"; - ar7_parts[p].offset = new_offset; - ar7_parts[p].size = master->size - new_offset - post_size; - ar7_parts[p - 1].size -= ar7_parts[p].size; - ar7_parts[p - 1].mask_flags |= MTD_WRITEABLE; - ar7_parts[p++].mask_flags = 0; - ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, p - 1); - } else { - printk("Squashfs not found. Moving rootfs partition to next erase block\n"); - if ((root_offset % master->erasesize) > 0) - root_offset += master->erasesize - - (root_offset % master->erasesize); - - ar7_parts[p].offset = root_offset; - ar7_parts[p].size = master->size - root_offset - post_size; - ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, p); + + master->read(master, root_offset, sizeof(header), &len, (u_char *)&header); + if (header.checksum != SQUASHFS_MAGIC) { + root_offset += master->erasesize - 1; + root_offset &= ~(master->erasesize - 1); } + + ar7_parts[2].name = "linux"; + ar7_parts[2].offset = pre_size; + ar7_parts[2].size = master->size - pre_size - post_size; + ar7_parts[2].mask_flags = 0; + + ar7_parts[3].name = "rootfs"; + ar7_parts[3].offset = root_offset; + ar7_parts[3].size = master->size - root_offset - post_size; + ar7_parts[3].mask_flags = 0; + *pparts = ar7_parts; - return p; + return 4; } static struct mtd_part_parser ar7_parser = {