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authorRafał Miłecki <zajec5@gmail.com>2013-10-22 00:34:37 +0400
committerBrian Norris <computersforpeace@gmail.com>2013-11-07 11:32:58 +0400
commit020c6bcfbeabee72c18d862769d72cf9241b9004 (patch)
treeffbcee69699a94fe2d2484f2d7f6e4e8706e571a
parent99b1d1887fee36ef9ff5d2ee24f0cf3e8c172104 (diff)
downloadlinux-020c6bcfbeabee72c18d862769d72cf9241b9004.tar.xz
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> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
-rw-r--r--drivers/mtd/bcm47xxpart.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/bcm47xxpart.c b/drivers/mtd/bcm47xxpart.c
index 6d427468c4cd..a737450826ec 100644
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -32,6 +32,7 @@
#define ML_MAGIC1 0x39685a42
#define ML_MAGIC2 0x26594131
#define TRX_MAGIC 0x30524448
+#define SQSH_MAGIC 0x71736873 /* shsq */
struct trx_header {
uint32_t magic;
@@ -174,6 +175,13 @@ static int bcm47xxpart_parse(struct mtd_info *master,
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. */