asix: Add a new driver for the AX88172A

The Asix AX88172A is a USB 2.0 Ethernet interface that supports both an
internal PHY as well as an external PHY (connected via MII).

This patch adds a driver for the AX88172A and provides support for
both modes and the phylib.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index 3c1429a25ca4..336f75567091 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -258,8 +258,9 @@ int asix_set_hw_mii(struct usbnet *dev)
         return ret;
 }
 
-int asix_get_phy_addr(struct usbnet *dev)
+int asix_read_phy_addr(struct usbnet *dev, int internal)
 {
+        int offset = (internal ? 1 : 0);
         u8 buf[2];
         int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
 
@@ -271,12 +272,19 @@ int asix_get_phy_addr(struct usbnet *dev)
         }
         netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
                    *((__le16 *)buf));
-        ret = buf[1];
+        ret = buf[offset];
 
 out:
         return ret;
 }
 
+int asix_get_phy_addr(struct usbnet *dev)
+{
+        /* return the address of the internal phy */
+        return asix_read_phy_addr(dev, 1);
+}
+
+
 int asix_sw_reset(struct usbnet *dev, u8 flags)
 {
         int ret;