+++ /dev/null
-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(-)
-
-Index: linux-3.8.13/drivers/mtd/Kconfig
-===================================================================
---- linux-3.8.13.orig/drivers/mtd/Kconfig 2013-08-04 19:55:18.499988719 +0200
-+++ linux-3.8.13/drivers/mtd/Kconfig 2013-08-04 19:55:22.599988819 +0200
-@@ -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-3.8.13/drivers/mtd/mtdpart.c
-===================================================================
---- linux-3.8.13.orig/drivers/mtd/mtdpart.c 2013-08-04 19:55:18.791988726 +0200
-+++ linux-3.8.13/drivers/mtd/mtdpart.c 2013-08-06 13:39:13.212319144 +0200
-@@ -833,6 +833,191 @@
- }
- #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_tplink_size(struct mtd_info *mtd,
-+ unsigned long offset)
-+{
-+#define TPLINK_MAGIC 0x00000002
-+ 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) != TPLINK_MAGIC)
-+ return 0;
-+
-+ ret = mtd_read(mtd, offset + 0x78, 4, &len, (void *)&temp);
-+ if (ret || len != sizeof(temp))
-+ return 0;
-+
-+ return temp + 0x200;
-+}
-+
-+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)
-+ split_partitions[0].size = find_tplink_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 +1034,7 @@
- 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 +1051,15 @@
-
- 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) {
projects / openwrt / svn-archive / archive.git / blobdiff