mirror of https://github.com/hak5/openwrt-owl.git
bcm63xx: handle huawei nvram layout
Use a different length for calculating the nvram checksum on hauwei boards. Fixes boot on HW553 and HW556. Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 35533owl
Jonas Gorski
parent
de123c4409
commit
200359a520
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@ -0,0 +1,49 @@
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From fb1e2c8a1073297f4674ca90c7d533de5187d158 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Sat, 9 Feb 2013 12:09:53 +0100
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Subject: [PATCH] MIPS: BCM63XX: handle huawei nvram layout
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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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Huawei uses a custom nvram layout, extending it with additional 32
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byte field. This pushes also the checksum further, causing it to
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always fail the check.
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Add an additional crc check for handling this modified nvram layout
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based on the different size.
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Reported-by: Álvaro Fernández Rojas <noltari@gmail.com>
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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---
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arch/mips/bcm63xx/nvram.c | 18 +++++++++++++++++-
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1 file changed, 17 insertions(+), 1 deletion(-)
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--- a/arch/mips/bcm63xx/nvram.c
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+++ b/arch/mips/bcm63xx/nvram.c
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@@ -59,8 +59,24 @@ int __init bcm63xx_nvram_init(void *addr
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crc = crc32_le(~0, (u8 *)&nvram, check_len);
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- if (crc != expected_crc)
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+ if (crc != expected_crc) {
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+ /* huawei uses a modified nvram that is 32 bytes longer */
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+ if (nvram.version == 2 && !strncmp(nvram.name, "HW5", 3)) {
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+ check_len += 32;
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+
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+ /* restore old value */
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+ nvram.checksum_old = expected_crc;
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+ expected_crc = *(u32 *)&nvram.reserved3[28];
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+ /* zero the checksum field */
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+ memset(&nvram.reserved3[28], 0, 4);
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+
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+ crc = crc32_le(~0, (u8 *)&nvram, check_len);
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+
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+ if (crc == expected_crc)
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+ return 0;
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+ }
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return -EINVAL;
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+ }
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return 0;
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}
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@ -20,7 +20,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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static struct bcm963xx_nvram nvram;
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static int mac_addr_used;
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@@ -105,3 +107,12 @@ int bcm63xx_nvram_get_mac_address(u8 *ma
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@@ -121,3 +123,12 @@ int bcm63xx_nvram_get_mac_address(u8 *ma
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return 0;
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}
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EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address);
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@ -1,6 +1,6 @@
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--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
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+++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
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@@ -796,6 +796,60 @@
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@@ -803,6 +803,60 @@ static struct board_info __initdata boar
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},
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},
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};
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@ -61,7 +61,7 @@
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#endif
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/*
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@@ -3750,6 +3804,7 @@
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@@ -3757,6 +3811,7 @@ static const struct board_info __initcon
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#ifdef CONFIG_BCM63XX_CPU_6345
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&board_96345gw2,
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&board_rta770bw,
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@ -8,7 +8,7 @@
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#include <linux/spi/spi.h>
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#include <linux/spi/spi_gpio.h>
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#include <linux/spi/74x164.h>
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@@ -3818,7 +3819,7 @@ static const struct board_info __initcon
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@@ -3873,7 +3874,7 @@ static const struct board_info __initcon
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* bcm4318 WLAN work
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*/
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#ifdef CONFIG_SSB_PCIHOST
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@ -17,7 +17,7 @@
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.revision = 0x02,
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.board_rev = 0x17,
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.country_code = 0x0,
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@@ -3838,6 +3839,7 @@ static struct ssb_sprom bcm63xx_sprom =
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@@ -3893,6 +3894,7 @@ static struct ssb_sprom bcm63xx_sprom =
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.boardflags_lo = 0x2848,
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.boardflags_hi = 0x0000,
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};
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@ -0,0 +1,49 @@
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From fb1e2c8a1073297f4674ca90c7d533de5187d158 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Sat, 9 Feb 2013 12:09:53 +0100
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Subject: [PATCH] MIPS: BCM63XX: handle huawei nvram layout
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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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Huawei uses a custom nvram layout, extending it with additional 32
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byte field. This pushes also the checksum further, causing it to
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always fail the check.
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Add an additional crc check for handling this modified nvram layout
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based on the different size.
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Reported-by: Álvaro Fernández Rojas <noltari@gmail.com>
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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---
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arch/mips/bcm63xx/nvram.c | 18 +++++++++++++++++-
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1 file changed, 17 insertions(+), 1 deletion(-)
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--- a/arch/mips/bcm63xx/nvram.c
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+++ b/arch/mips/bcm63xx/nvram.c
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@@ -59,8 +59,24 @@ int __init bcm63xx_nvram_init(void *addr
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crc = crc32_le(~0, (u8 *)&nvram, check_len);
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- if (crc != expected_crc)
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+ if (crc != expected_crc) {
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+ /* huawei uses a modified nvram that is 32 bytes longer */
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+ if (nvram.version == 2 && !strncmp(nvram.name, "HW5", 3)) {
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+ check_len += 32;
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+
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+ /* restore old value */
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+ nvram.checksum_old = expected_crc;
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+ expected_crc = *(u32 *)&nvram.reserved3[28];
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+ /* zero the checksum field */
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+ memset(&nvram.reserved3[28], 0, 4);
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+
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+ crc = crc32_le(~0, (u8 *)&nvram, check_len);
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+
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+ if (crc == expected_crc)
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+ return 0;
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+ }
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return -EINVAL;
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+ }
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return 0;
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}
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@ -20,7 +20,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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static struct bcm963xx_nvram nvram;
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static int mac_addr_used;
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@@ -105,3 +107,12 @@ int bcm63xx_nvram_get_mac_address(u8 *ma
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@@ -121,3 +123,12 @@ int bcm63xx_nvram_get_mac_address(u8 *ma
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return 0;
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}
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EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address);
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@ -1,6 +1,6 @@
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--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
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+++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
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@@ -796,6 +796,60 @@
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@@ -803,6 +803,60 @@ static struct board_info __initdata boar
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},
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},
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};
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@ -61,7 +61,7 @@
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#endif
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/*
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@@ -3750,6 +3804,7 @@
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@@ -3757,6 +3811,7 @@ static const struct board_info __initcon
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#ifdef CONFIG_BCM63XX_CPU_6345
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&board_96345gw2,
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&board_rta770bw,
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@ -8,7 +8,7 @@
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#include <linux/spi/spi.h>
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#include <linux/spi/spi_gpio.h>
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#include <linux/spi/74x164.h>
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@@ -3818,7 +3819,7 @@ static const struct board_info __initcon
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@@ -3873,7 +3874,7 @@ static const struct board_info __initcon
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* bcm4318 WLAN work
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*/
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#ifdef CONFIG_SSB_PCIHOST
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@ -17,7 +17,7 @@
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.revision = 0x02,
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.board_rev = 0x17,
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.country_code = 0x0,
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@@ -3838,6 +3839,7 @@ static struct ssb_sprom bcm63xx_sprom =
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@@ -3893,6 +3894,7 @@ static struct ssb_sprom bcm63xx_sprom =
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.boardflags_lo = 0x2848,
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.boardflags_hi = 0x0000,
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};
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