Signed-off-by: Mike Rapoport mike@compulab.co.il
drivers/dm9000x.c | 14 ++++++++++++++ include/net.h | 39 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/drivers/dm9000x.c b/drivers/dm9000x.c index 6877076..6486699 100644 --- a/drivers/dm9000x.c +++ b/drivers/dm9000x.c @@ -302,6 +302,20 @@ eth_init(bd_t * bd) /* Set Node address */ for (i = 0; i < 6; i++) ((u16 *) bd->bi_enetaddr)[i] = read_srom_word(i); + + if (!is_valid_ether_addr(bd->bi_enetaddr)) { + /* try reading from environment */ + u8 i; + char *s, *e; + s = getenv ("ethaddr"); + for (i = 0; i < 6; ++i) { + bd->bi_enetaddr[i] = s ? + simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } + } + printf("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", bd->bi_enetaddr[0], bd->bi_enetaddr[1], bd->bi_enetaddr[2], bd->bi_enetaddr[3], bd->bi_enetaddr[4], bd->bi_enetaddr[5]); diff --git a/include/net.h b/include/net.h index 461e038..34967e4 100644 --- a/include/net.h +++ b/include/net.h @@ -435,6 +435,45 @@ static inline void NetCopyLong(ulong *to, ulong *from) memcpy((void*)to, (void*)from, sizeof(ulong)); }
+/** + * is_zero_ether_addr - Determine if give Ethernet address is all zeros. + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Return true if the address is all zeroes. + */ +static inline int is_zero_ether_addr(const u8 *addr) +{ + return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]); +} + +/** + * is_multicast_ether_addr - Determine if the Ethernet address is a multicast. + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Return true if the address is a multicast address. + * By definition the broadcast address is also a multicast address. + */ +static inline int is_multicast_ether_addr(const u8 *addr) +{ + return (0x01 & addr[0]); +} + +/** + * is_valid_ether_addr - Determine if the given Ethernet address is valid + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not + * a multicast address, and is not FF:FF:FF:FF:FF:FF. + * + * Return true if the address is valid. + */ +static inline int is_valid_ether_addr(const u8 *addr) +{ + /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to + * explicitly check for it here. */ + return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr); +} + /* Convert an IP address to a string */ extern void ip_to_string (IPaddr_t x, char *s);