lantiq: add v3.9 support

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37089 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 221 insertions, 0 deletions

diff --git a/target/linux/lantiq/patches-3.9/0024-owrt-mtd-split.patch b/target/linux/lantiq/patches-3.9/0024-owrt-mtd-split.patch
new file mode 100644
index 0000000000..16da438183
--- /dev/null
+++ b/target/linux/lantiq/patches-3.9/0024-owrt-mtd-split.patch
@@ -0,0 +1,221 @@
+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 +833,168 @@ 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 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
+@@ -849,7 +1011,7 @@ 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 +1028,15 @@ 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) {