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

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
lede-17.01
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)