net: asix: init ASIX AX88772B MAC from EEPROM

The device comes up with a MAC address of all zeros. We need to read the
initial device MAC from EEPROM so it can be set properly later.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 30 insertions, 3 deletions

diff --git a/drivers/net/usb/asix.h b/drivers/net/usb/asix.h
index e889631161b8..7afe8ac078e8 100644
--- a/drivers/net/usb/asix.h
+++ b/drivers/net/usb/asix.h
@@ -167,6 +167,9 @@ struct asix_data {
         u8 res;
 };
 
+/* ASIX specific flags */
+#define FLAG_EEPROM_MAC         (1UL << 0)  /* init device MAC from eeprom */
+
 int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
                   u16 size, void *data);
 
diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
index 7a6e758f48e7..0ecc3bc6c3d7 100644
--- a/drivers/net/usb/asix_devices.c
+++ b/drivers/net/usb/asix_devices.c
@@ -422,14 +422,25 @@ static const struct net_device_ops ax88772_netdev_ops = {
 
 static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
 {
-        int ret, embd_phy;
+        int ret, embd_phy, i;
         u8 buf[ETH_ALEN];
         u32 phyid;
 
         usbnet_get_endpoints(dev,intf);
 
         /* Get the MAC address */
-        ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf);
+        if (dev->driver_info->data & FLAG_EEPROM_MAC) {
+                for (i = 0; i < (ETH_ALEN >> 1); i++) {
+                        ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, 0x04 + i,
+                                        0, 2, buf + i * 2);
+                        if (ret < 0)
+                                break;
+                }
+        } else {
+                ret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID,
+                                0, 0, ETH_ALEN, buf);
+        }
+
         if (ret < 0) {
                 netdev_dbg(dev->net, "Failed to read MAC address: %d\n", ret);
                 return ret;
@@ -872,6 +883,19 @@ static const struct driver_info ax88772_info = {
         .tx_fixup = asix_tx_fixup,
 };
 
+static const struct driver_info ax88772b_info = {
+        .description = "ASIX AX88772B USB 2.0 Ethernet",
+        .bind = ax88772_bind,
+        .status = asix_status,
+        .link_reset = ax88772_link_reset,
+        .reset = ax88772_reset,
+        .flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_LINK_INTR |
+                 FLAG_MULTI_PACKET,
+        .rx_fixup = asix_rx_fixup,
+        .tx_fixup = asix_tx_fixup,
+        .data = FLAG_EEPROM_MAC,
+};
+
 static const struct driver_info ax88178_info = {
         .description = "ASIX AX88178 USB 2.0 Ethernet",
         .bind = ax88178_bind,
@@ -953,7 +977,7 @@ static const struct usb_device_id	products [] = {
 }, {
         // ASIX AX88772B 10/100
         USB_DEVICE (0x0b95, 0x772b),
-        .driver_info = (unsigned long) &ax88772_info,
+        .driver_info = (unsigned long) &ax88772b_info,
 }, {
         // ASIX AX88772 10/100
         USB_DEVICE (0x0b95, 0x7720),