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-rw-r--r--target/linux/lantiq/patches-3.0/210-mtd_uimage_split.patch116
1 files changed, 116 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.0/210-mtd_uimage_split.patch b/target/linux/lantiq/patches-3.0/210-mtd_uimage_split.patch
new file mode 100644
index 0000000000..16173a3d27
--- /dev/null
+++ b/target/linux/lantiq/patches-3.0/210-mtd_uimage_split.patch
@@ -0,0 +1,116 @@
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -57,6 +57,10 @@ config MTD_ROOTFS_SPLIT
+ depends on MTD_PARTITIONS
+ 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
+@@ -860,6 +860,82 @@ 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 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 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) {
++ printk(KERN_NOTICE "no uImage found in linux 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;
++ }
++
++ 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
+@@ -893,6 +969,17 @@ int add_mtd_partitions(struct mtd_info *
+
+ add_mtd_device(&slave->mtd);
+
++#ifdef CONFIG_MTD_UIMAGE_SPLIT
++ if (!strcmp(parts[i].name, "linux")) {
++ ret = split_uimage(master, &parts[i]);
++
++ if (ret) {
++ printk(KERN_WARNING
++ "Can't split linux partition\n");
++ }
++ }
++#endif
++
+ if (!strcmp(parts[i].name, "rootfs")) {
+ #ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
+ if (ROOT_DEV == 0) {