51 lines
1.6 KiB
Diff
51 lines
1.6 KiB
Diff
From 020c6bcfbeabee72c18d862769d72cf9241b9004 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Date: Mon, 21 Oct 2013 22:34:37 +0200
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Subject: [PATCH] mtd: bcm47xxpart: detect block aligned Squashfs partition
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Most of the bcm47xx devices use TRX format for storing kernel and some
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partition like Squashfs or JFFS2. This is pretty flexible solution, CFE
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(the bootloader) just writes (and later boots) TRX at some hardcoded
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place and paritions can vary in the size.
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However some devices don't use TRX format. Very recently we have
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discovered ZTE H218N that has kernel and rootfs partitions at some
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"random" places.
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This patch allows Linux find a rootfs partition after installing custom
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image with a CFE bootloader.
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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---
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drivers/mtd/bcm47xxpart.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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--- a/drivers/mtd/bcm47xxpart.c
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+++ b/drivers/mtd/bcm47xxpart.c
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@@ -32,6 +32,7 @@
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#define ML_MAGIC1 0x39685a42
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#define ML_MAGIC2 0x26594131
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#define TRX_MAGIC 0x30524448
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+#define SQSH_MAGIC 0x71736873 /* shsq */
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struct trx_header {
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uint32_t magic;
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@@ -174,6 +175,13 @@ static int bcm47xxpart_parse(struct mtd_
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offset = rounddown(offset + trx->length, blocksize);
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continue;
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}
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+
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+ /* Squashfs on devices not using TRX */
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+ if (buf[0x000 / 4] == SQSH_MAGIC) {
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+ bcm47xxpart_add_part(&parts[curr_part++], "rootfs",
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+ offset, 0);
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+ continue;
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+ }
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}
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/* Look for NVRAM at the end of the last block. */
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