brcm63xx: provide a default sane MAC address for Cable Modem devices
authorFlorian Fainelli <florian@openwrt.org>
Tue, 18 Jun 2013 10:54:24 +0000 (10:54 +0000)
committerFlorian Fainelli <florian@openwrt.org>
Tue, 18 Jun 2013 10:54:24 +0000 (10:54 +0000)
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

target/linux/brcm63xx/patches-3.9/426-hcs_mac_addr_pool.patch [new file with mode: 0644]

diff --git a/target/linux/brcm63xx/patches-3.9/426-hcs_mac_addr_pool.patch b/target/linux/brcm63xx/patches-3.9/426-hcs_mac_addr_pool.patch
new file mode 100644 (file)
index 0000000..6354fe6
--- /dev/null
@@ -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)