net: dm9000: random mac address support
When an unprogrammed EEPROM is attached to a dm9000, the dm9000 will
come up with a invalid MAC address of ff:ff:ff:ff:ff:ff. Add code that
gets enabled if CONFIG_RANDOM_MACADDR is enabled that generates a random
(and valid) locally administered MAC address that allows the system to
network boot until a real MAC address can be configured.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
diff --git a/drivers/net/dm9000x.c b/drivers/net/dm9000x.c
index f7170e0..b68d808 100644
--- a/drivers/net/dm9000x.c
+++ b/drivers/net/dm9000x.c
@@ -342,6 +342,15 @@
DM9000_iow(DM9000_ISR, ISR_ROOS | ISR_ROS | ISR_PTS | ISR_PRS);
printf("MAC: %pM\n", dev->enetaddr);
+ if (!is_valid_ether_addr(dev->enetaddr)) {
+#ifdef CONFIG_RANDOM_MACADDR
+ printf("Bad MAC address (uninitialized EEPROM?), randomizing\n");
+ eth_random_enetaddr(dev->enetaddr);
+ printf("MAC: %pM\n", dev->enetaddr);
+#else
+ printf("WARNING: Bad MAC address (uninitialized EEPROM?)\n");
+#endif
+ }
/* fill device MAC address registers */
for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)