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net: dm9000: random mac address support

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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>
This commit is contained in:
Andrew Ruder 2013-10-22 19:09:02 -05:00 committed by Joe Hershberger
parent 8712adfd05
commit c583ee16cb
1 changed files with 9 additions and 0 deletions
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9
drivers/net/dm9000x.c
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@ -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++)