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Allow mac address to be set in smsc95xx

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Signed-off-by: popcornmix <popcornmix@gmail.com>
This commit is contained in:
popcornmix
2013-03-26 17:26:38 +00:00
parent 684e7b822b
commit aac7b10578
1 changed files with 56 additions and 0 deletions
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56
drivers/net/usb/smsc95xx.c
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@@ -60,6 +60,7 @@
#define SUSPEND_SUSPEND3 (0x08)
#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
#define MAC_ADDR_LEN (6)
#define CARRIER_CHECK_DELAY (2 * HZ)
@@ -90,6 +91,10 @@ static int packetsize = 2560;
module_param(packetsize, int, 0644);
MODULE_PARM_DESC(packetsize, "Override the RX URB packet size");
static char *macaddr = ":";
module_param(macaddr, charp, 0);
MODULE_PARM_DESC(macaddr, "MAC address");
static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
u32 *data, int in_pm)
{
@@ -921,6 +926,53 @@ static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
}
/* Check the macaddr module parameter for a MAC address */
static int smsc95xx_is_macaddr_param(struct usbnet *dev, u8 *dev_mac)
{
int i, j, got_num, num;
u8 mtbl[MAC_ADDR_LEN];
if (macaddr[0] == ':')
return 0;
i = 0;
j = 0;
num = 0;
got_num = 0;
while (j < MAC_ADDR_LEN) {
if (macaddr[i] && macaddr[i] != ':') {
got_num++;
if ('0' <= macaddr[i] && macaddr[i] <= '9')
num = num * 16 + macaddr[i] - '0';
else if ('A' <= macaddr[i] && macaddr[i] <= 'F')
num = num * 16 + 10 + macaddr[i] - 'A';
else if ('a' <= macaddr[i] && macaddr[i] <= 'f')
num = num * 16 + 10 + macaddr[i] - 'a';
else
break;
i++;
} else if (got_num == 2) {
mtbl[j++] = (u8) num;
num = 0;
got_num = 0;
i++;
} else {
break;
}
}
if (j == MAC_ADDR_LEN) {
netif_dbg(dev, ifup, dev->net, "Overriding MAC address with: "
"%02x:%02x:%02x:%02x:%02x:%02x\n", mtbl[0], mtbl[1], mtbl[2],
mtbl[3], mtbl[4], mtbl[5]);
for (i = 0; i < MAC_ADDR_LEN; i++)
dev_mac[i] = mtbl[i];
return 1;
} else {
return 0;
}
}
static void smsc95xx_init_mac_address(struct usbnet *dev)
{
const u8 *mac_addr;
@@ -942,6 +994,10 @@ static void smsc95xx_init_mac_address(struct usbnet *dev)
}
}
/* Check module parameters */
if (smsc95xx_is_macaddr_param(dev, dev->net->dev_addr))
return;
/* no useful static MAC address found. generate a random one */
eth_hw_addr_random(dev->net);
netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");