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brcm63xx: provide a default sane MAC address for Cable Modem devices

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Cable modem devices currently poke at some random location in RAM and
may end up having an invalid MAC address which is not suitable. Provide
a default one which is sane.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 36957
This commit is contained in:
Florian Fainelli 2013-06-18 10:54:24 +00:00
parent 0f19cb3811
commit a9d4bdee43
1 changed files with 26 additions and 0 deletions
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26
target/linux/brcm63xx/patches-3.9/426-hcs_mac_addr_pool.patch Normal file
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@ -0,0 +1,26 @@
--- a/arch/mips/bcm63xx/nvram.c
+++ b/arch/mips/bcm63xx/nvram.c
@@ -52,6 +52,7 @@ void __init bcm63xx_nvram_init(void *add
{
unsigned int check_len;
u32 crc, expected_crc;
+ u8 hcs_mac_addr[ETH_ALEN] = { 0x00, 0x10, 0x18, 0xff, 0xff, 0xff };
/* extract nvram data */
memcpy(&nvram, addr, sizeof(nvram));
@@ -73,6 +74,15 @@ void __init bcm63xx_nvram_init(void *add
if (crc != expected_crc)
pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n",
expected_crc, crc);
+
+ /* Cable modems have a different NVRAM which is embedded in the eCos
+ * firmware and not easily extractible, give at least a MAC address
+ * pool.
+ */
+ if (BCMCPU_IS_3368()) {
+ memcpy(nvram.mac_addr_base, hcs_mac_addr, ETH_ALEN);
+ nvram.mac_addr_count = 2;
+ }
}
u8 *bcm63xx_nvram_get_name(void)