From 020c6bcfbeabee72c18d862769d72cf9241b9004 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Mon, 21 Oct 2013 22:34:37 +0200 Subject: [PATCH] mtd: bcm47xxpart: detect block aligned Squashfs partition MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Brian Norris --- drivers/mtd/bcm47xxpart.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- 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_ 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. */