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-rw-r--r--target/linux/lantiq/patches-3.2/201-owrt-mtd_split.patch244
1 files changed, 244 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.2/201-owrt-mtd_split.patch b/target/linux/lantiq/patches-3.2/201-owrt-mtd_split.patch
new file mode 100644
index 0000000000..aaf2395fb2
--- /dev/null
+++ b/target/linux/lantiq/patches-3.2/201-owrt-mtd_split.patch
@@ -0,0 +1,244 @@
+Index: linux-3.2.9/drivers/mtd/Kconfig
+===================================================================
+--- linux-3.2.9.orig/drivers/mtd/Kconfig 2012-03-17 17:43:47.395607926 +0100
++++ linux-3.2.9/drivers/mtd/Kconfig 2012-03-17 20:49:30.279873461 +0100
+@@ -31,6 +31,10 @@
+ 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---
+Index: linux-3.2.9/drivers/mtd/mtdpart.c
+===================================================================
+--- linux-3.2.9.orig/drivers/mtd/mtdpart.c 2012-03-17 17:43:47.407607922 +0100
++++ linux-3.2.9/drivers/mtd/mtdpart.c 2012-03-17 20:49:42.987873819 +0100
+@@ -874,6 +874,169 @@
+ }
+ #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 unsigned long find_eva_size(struct mtd_info *mtd,
++ unsigned long offset)
++{
++#define EVA_MAGIC 0xfeed1281
++ 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) != EVA_MAGIC)
++ return 0;
++
++ ret = mtd->read(mtd, offset + 4, 4, &len, (void *)&temp);
++ if (ret || len != sizeof(temp))
++ return 0;
++
++ /* add eva header size */
++ temp = le32_to_cpu(temp) + 0x18;
++
++ temp &= ~0xffff;
++ temp += 0x10000;
++ return temp;
++}
++
++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 detect_eva_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 be32_to_cpu(temp) == SQUASHFS_MAGIC;
++}
++
++static unsigned long find_brnimage_size(struct mtd_info *mtd,
++ unsigned long offset)
++{
++ unsigned long buf[4];
++ // Assume at most 2MB of kernel image
++ unsigned long end = offset + (2 << 20);
++ unsigned long ptr = offset + 0x400 - 12;
++ size_t len;
++ int ret;
++
++ while (ptr < end) {
++ long size_min = ptr - 0x400 - 12 - offset;
++ long size_max = ptr + 12 - offset;
++ ret = mtd->read(mtd, ptr, 16, &len, (void *)buf);
++ if (ret || len != 16)
++ return 0;
++
++ if (le32_to_cpu(buf[0]) < size_min ||
++ le32_to_cpu(buf[0]) > size_max) {
++ ptr += 0x400;
++ continue;
++ }
++
++ if (le32_to_cpu(buf[3]) == SQUASHFS_MAGIC)
++ return ptr + 12 - offset;
++
++ ptr += 0x400;
++ }
++
++ 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_eva_size(mtd, part->offset);
++ if (!split_partitions[0].size) {
++ split_partitions[0].size = find_brnimage_size(mtd, part->offset);
++ if (!split_partitions[0].size) {
++ printk(KERN_NOTICE "no uImage or brnImage or eva found in linux partition\n");
++ return -1;
++ }
++ }
++ }
++
++ if (detect_eva_squashfs_partition(mtd,
++ part->offset
++ + split_partitions[0].size)) {
++ split_partitions[0].size += 0x100;
++ pr_info("found eva dummy squashfs behind kernel\n");
++ } else 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
+@@ -907,6 +1070,17 @@
+
+ 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) {
+Index: linux-3.2.9/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+===================================================================
+--- linux-3.2.9.orig/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h 2012-03-17 20:49:32.000000000 +0100
++++ linux-3.2.9/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h 2012-03-17 20:50:07.815874369 +0100
+@@ -156,6 +156,7 @@
+
+ extern __iomem void *ltq_ebu_membase;
+ extern __iomem void *ltq_cgu_membase;
++extern unsigned long ltq_brn_boot;
+
+ static inline int ltq_is_ase(void)
+ {
+Index: linux-3.2.9/arch/mips/lantiq/setup.c
+===================================================================
+--- linux-3.2.9.orig/arch/mips/lantiq/setup.c 2012-03-17 20:49:32.000000000 +0100
++++ linux-3.2.9/arch/mips/lantiq/setup.c 2012-03-17 20:50:07.815874369 +0100
+@@ -18,6 +18,9 @@
+ #include "devices.h"
+ #include "prom.h"
+
++/* set to 1 if the bootloader is BRN-BOOT instead of u-boot */
++unsigned long ltq_brn_boot = 0;
++
+ void __init plat_mem_setup(void)
+ {
+ /* assume 16M as default incase uboot fails to pass proper ramsize */
+@@ -38,6 +41,10 @@
+ if (strict_strtoul(e, 0, &memsize))
+ pr_warn("bad memsize specified\n");
+ }
++ if (!strncmp(e, "BRN-BOOT", 8)){
++ pr_info("Found BRN-BOOT instead of u-boot\n");
++ ltq_brn_boot = 1;
++ }
+ envp++;
+ }
+ memsize *= 1024 * 1024;