diff options
| author | Sebastien Jan <s-jan@ti.com> | 2011-08-28 07:37:55 +0100 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-08-28 07:37:55 +0100 |
| commit | 9b1cc1d685ac62f8362ece76b7e7502673928558 (patch) | |
| tree | 96a2b59792efd50c151a8d603aa184cf57a81dfa | |
| parent | cdbb60ae121869ea63807b51e35f6c206f646ee2 (diff) | |
smsc95xx: Add module parameter to override MAC address
Define a new module parameter 'macaddr' to override the MAC address
fetched either from eeprom, or randomly generated.
The expected MAC address shall be in the 01:23:45:67:89:AB format.
Signed-off-by: Sebastien Jan <s-jan@ti.com>
| -rw-r--r-- | drivers/net/usb/smsc95xx.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index f74f3ce7152..b9b38190e38 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -46,6 +46,7 @@ #define SMSC95XX_INTERNAL_PHY_ID (1) #define SMSC95XX_TX_OVERHEAD (8) #define SMSC95XX_TX_OVERHEAD_CSUM (12) +#define MAC_ADDR_LEN (6) struct smsc95xx_priv { u32 mac_cr; @@ -63,6 +64,10 @@ static int turbo_mode = true; module_param(turbo_mode, bool, 0644); MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); +static char *macaddr = ":"; +module_param(macaddr, charp, 0); +MODULE_PARM_DESC(macaddr, "MAC address"); + static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data) { u32 *buf = kmalloc(4, GFP_KERNEL); @@ -600,8 +605,59 @@ 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) { + /* Check module parameters */ + if (smsc95xx_is_macaddr_param(dev, dev->net->dev_addr)) + return; + /* try reading mac address from EEPROM */ if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, dev->net->dev_addr) == 0) { |