diff options
Diffstat (limited to 'target/linux/ramips/patches-3.9/0208-owrt-mtd-split.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.9/0208-owrt-mtd-split.patch | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.9/0208-owrt-mtd-split.patch b/target/linux/ramips/patches-3.9/0208-owrt-mtd-split.patch new file mode 100644 index 0000000000..f15d16f6da --- /dev/null +++ b/target/linux/ramips/patches-3.9/0208-owrt-mtd-split.patch @@ -0,0 +1,151 @@ +From 2a295753a10823a47542c779a25bbb1f52c71281 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Fri, 3 Aug 2012 10:27:13 +0200 +Subject: [PATCH 19/25] owrt mtd split + +--- + .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 1 + + arch/mips/lantiq/setup.c | 7 + + drivers/mtd/Kconfig | 4 + + drivers/mtd/mtdpart.c | 173 +++++++++++++++++++- + 4 files changed, 184 insertions(+), 1 deletions(-) + +--- a/drivers/mtd/Kconfig ++++ b/drivers/mtd/Kconfig +@@ -31,6 +31,10 @@ config MTD_ROOTFS_SPLIT + bool "Automatically split 'rootfs' partition for squashfs" + default y + ++config MTD_UIMAGE_SPLIT ++ bool "Automatically split 'linux' partition into 'kernel' and 'rootfs'" ++ default y ++ + config MTD_REDBOOT_PARTS + tristate "RedBoot partition table parsing" + ---help--- +--- a/drivers/mtd/mtdpart.c ++++ b/drivers/mtd/mtdpart.c +@@ -833,6 +833,99 @@ static int refresh_rootfs_split(struct m + } + #endif /* CONFIG_MTD_ROOTFS_SPLIT */ + ++#ifdef CONFIG_MTD_UIMAGE_SPLIT ++static unsigned long find_uimage_size(struct mtd_info *mtd, ++ unsigned long offset) ++{ ++#define UBOOT_MAGIC 0x56190527 ++ unsigned long magic = 0; ++ unsigned long temp; ++ size_t len; ++ int ret; ++ ++ ret = mtd_read(mtd, offset, 4, &len, (void *)&magic); ++ if (ret || len != sizeof(magic)) ++ return 0; ++ ++ if (le32_to_cpu(magic) != UBOOT_MAGIC) ++ return 0; ++ ++ ret = mtd_read(mtd, offset + 12, 4, &len, (void *)&temp); ++ if (ret || len != sizeof(temp)) ++ return 0; ++ ++ return be32_to_cpu(temp) + 0x40; ++} ++ ++static int detect_squashfs_partition(struct mtd_info *mtd, unsigned long offset) ++{ ++ unsigned long temp; ++ size_t len; ++ int ret; ++ ++ ret = mtd_read(mtd, offset, 4, &len, (void *)&temp); ++ if (ret || len != sizeof(temp)) ++ return 0; ++ ++ return le32_to_cpu(temp) == SQUASHFS_MAGIC; ++} ++ ++static unsigned long find_squashfs_offset(struct mtd_info *mtd, unsigned long _offset) ++{ ++ /* scan the first 2MB at 64K offsets */ ++ int i; ++ ++ for (i = 0; i < 32; i++) { ++ unsigned long offset = i * 64 * 1024; ++ if (detect_squashfs_partition(mtd, _offset + offset)) ++ return offset; ++ } ++ return 0; ++} ++ ++static int split_uimage(struct mtd_info *mtd, ++ const struct mtd_partition *part) ++{ ++ static struct mtd_partition split_partitions[] = { ++ { ++ .name = "kernel", ++ .offset = 0x0, ++ .size = 0x0, ++ }, { ++ .name = "rootfs", ++ .offset = 0x0, ++ .size = 0x0, ++ }, ++ }; ++ ++ split_partitions[0].size = find_uimage_size(mtd, part->offset); ++ if (!split_partitions[0].size) { ++ split_partitions[0].size = find_squashfs_offset(mtd, part->offset); ++ if (!split_partitions[0].size) { ++ pr_err("failed to split firmware partition\n"); ++ return -1; ++ } ++ } ++ ++ if (!detect_squashfs_partition(mtd, ++ part->offset ++ + split_partitions[0].size)) { ++ split_partitions[0].size &= ~(mtd->erasesize - 1); ++ split_partitions[0].size += mtd->erasesize; ++ } else { ++ pr_info("found squashfs behind kernel\n"); ++ } ++ ++ split_partitions[0].offset = part->offset; ++ split_partitions[1].offset = part->offset + split_partitions[0].size; ++ split_partitions[1].size = part->size - split_partitions[0].size; ++ ++ add_mtd_partitions(mtd, split_partitions, 2); ++ ++ return 0; ++} ++#endif ++ + /* + * This function, given a master MTD object and a partition table, creates + * and registers slave MTD objects which are bound to the master according to +@@ -849,7 +942,7 @@ int add_mtd_partitions(struct mtd_info * + struct mtd_part *slave; + uint64_t cur_offset = 0; + int i; +-#ifdef CONFIG_MTD_ROOTFS_SPLIT ++#if defined(CONFIG_MTD_ROOTFS_SPLIT) || defined(CONFIG_MTD_UIMAGE_SPLIT) + int ret; + #endif + +@@ -866,6 +959,14 @@ int add_mtd_partitions(struct mtd_info * + + add_mtd_device(&slave->mtd); + ++#ifdef CONFIG_MTD_UIMAGE_SPLIT ++ if (!strcmp(parts[i].name, "firmware")) { ++ ret = split_uimage(master, &parts[i]); ++ if (ret) ++ printk(KERN_WARNING "Can't split firmware partition\n"); ++ } ++#endif ++ + if (!strcmp(parts[i].name, "rootfs")) { + #ifdef CONFIG_MTD_ROOTFS_ROOT_DEV + if (ROOT_DEV == 0) { |