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-rw-r--r--target/linux/brcm47xx/patches-3.10/029-mtd-bcm47xxpart_detect_block_aligned_Squashfs_partition.patch40
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.10/029-mtd-bcm47xxpart_detect_block_aligned_Squashfs_partition.patch b/target/linux/brcm47xx/patches-3.10/029-mtd-bcm47xxpart_detect_block_aligned_Squashfs_partition.patch
new file mode 100644
index 0000000000..0efe16f9d4
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/029-mtd-bcm47xxpart_detect_block_aligned_Squashfs_partition.patch
@@ -0,0 +1,40 @@
+mtd: bcm47xxpart: detect block aligned Squashfs partition
+
+Most of the bcm47xx devices use TRX format for storing kernel and some
+partition like Squashfs or JFFS2. This is pretty flexible solution, CFE
+(the bootloader) just writes (and later boots) TRX at some hardcoded
+place and paritions can vary in the size.
+
+However some devices don't use TRX format. Very recently we have
+discovered ZTE H218N that has kernel and rootfs partitions at some
+"random" places.
+
+This patch allows Linux find a rootfs partition after installing custom
+image with a CFE bootloader.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+
+--- a/drivers/mtd/bcm47xxpart.c
++++ b/drivers/mtd/bcm47xxpart.c
+@@ -33,6 +33,7 @@
+ #define ML_MAGIC1 0x39685a42
+ #define ML_MAGIC2 0x26594131
+ #define TRX_MAGIC 0x30524448
++#define SQSH_MAGIC 0x71736873 /* shsq */
+
+ struct trx_header {
+ uint32_t magic;
+@@ -170,6 +171,13 @@ static int bcm47xxpart_parse(struct mtd_
+ offset = rounddown(offset + trx->length, blocksize);
+ continue;
+ }
++
++ /* Squashfs on devices not using TRX */
++ if (buf[0x000 / 4] == SQSH_MAGIC) {
++ bcm47xxpart_add_part(&parts[curr_part++], "rootfs",
++ offset, 0);
++ continue;
++ }
+ }
+
+ /* Look for NVRAM at the end of the last block. */