Add ability to take MAC address from the environment to DM9000 driver

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Ben Warren <bwarren@qstreams.com>

diff --git a/drivers/dm9000x.c b/drivers/dm9000x.c
index 687707627e5d781c88a92acfda0d3c2e06b48ce9..78acb097ef88c773b50ad139b0c90361f94cb7f7 100644 (file)
--- a/drivers/dm9000x.c
+++ b/drivers/dm9000x.c
@@ -302,6 +302,21 @@ 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_zero_ether_addr(bd->bi_enetaddr) &&
+           !is_mutlicast_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 96719480097f55863ceb50b0e8b79e463c859b52..aa58e333a627d35fb7393d42a5bbee6ebc86fe8d 100644 (file)
--- a/include/net.h
+++ b/include/net.h
@@ -435,6 +435,29 @@ 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]);
+}
+
 /* Convert an IP address to a string */
 extern void    ip_to_string (IPaddr_t x, char *s);