From c583ee16cb5db73fc299bb679ecb75a5abb3ca47 Mon Sep 17 00:00:00 2001 From: Andrew Ruder Date: Tue, 22 Oct 2013 19:09:02 -0500 Subject: [PATCH] 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 --- drivers/net/dm9000x.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/dm9000x.c b/drivers/net/dm9000x.c index f7170e0554..b68d808c74 100644 --- a/drivers/net/dm9000x.c +++ b/drivers/net/dm9000x.c @@ -342,6 +342,15 @@ static int dm9000_init(struct eth_device *dev, bd_t *bd) 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++)