OpenWrt – Rev 4

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Rev:
--- a/drivers/net/ethernet/atheros/ar231x/ar231x.c
+++ b/drivers/net/ethernet/atheros/ar231x/ar231x.c
@@ -135,6 +135,7 @@ static int ar231x_mdiobus_write(struct m
 static int ar231x_mdiobus_reset(struct mii_bus *bus);
 static int ar231x_mdiobus_probe(struct net_device *dev);
 static void ar231x_adjust_link(struct net_device *dev);
+static bool no_phy;
 
 #ifndef ERR
 #define ERR(fmt, args...) printk("%s: " fmt, __func__, ##args)
@@ -167,6 +168,32 @@ static const struct net_device_ops ar231
 #endif
 };
 
+static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id)
+{
+       int phy_reg;
+
+       /**
+        * Grab the bits from PHYIR1, and put them
+        * in the upper half.
+        */
+       phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
+
+       if (phy_reg < 0)
+               return -EIO;
+
+       *phy_id = (phy_reg & 0xffff) << 16;
+
+       /* Grab the bits from PHYIR2, and put them in the lower half */
+       phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
+
+       if (phy_reg < 0)
+               return -EIO;
+
+       *phy_id |= (phy_reg & 0xffff);
+
+       return 0;
+}
+
 static int ar231x_probe(struct platform_device *pdev)
 {
        struct net_device *dev;
@@ -273,6 +300,24 @@ static int ar231x_probe(struct platform_
 
        mdiobus_register(sp->mii_bus);
 
+       /**
+        * Workaround for Micrel switch, which is only available on
+        * one PHY and cannot be configured through MDIO.
+        */
+       if (!no_phy) {
+               u32 phy_id = 0;
+
+               get_phy_id(sp->mii_bus, 1, &phy_id);
+               if (phy_id == 0x00221450)
+                       no_phy = true;
+       }
+       if (no_phy) {
+               sp->link = 1;
+               netif_carrier_on(dev);
+               return 0;
+       }
+       no_phy = true;
+
        if (ar231x_mdiobus_probe(dev) != 0) {
                printk(KERN_ERR "%s: mdiobus_probe failed\n", dev->name);
                rx_tasklet_cleanup(dev);
@@ -326,8 +371,10 @@ static int ar231x_remove(struct platform
        rx_tasklet_cleanup(dev);
        ar231x_init_cleanup(dev);
        unregister_netdev(dev);
-       mdiobus_unregister(sp->mii_bus);
-       mdiobus_free(sp->mii_bus);
+       if (sp->mii_bus) {
+               mdiobus_unregister(sp->mii_bus);
+               mdiobus_free(sp->mii_bus);
+       }
        kfree(dev);
        return 0;
 }
@@ -870,7 +917,8 @@ static int ar231x_open(struct net_device
 
        sp->eth_regs->mac_control |= MAC_CONTROL_RE;
 
-       phy_start(sp->phy_dev);
+       if (sp->phy_dev)
+               phy_start(sp->phy_dev);
 
        return 0;
 }
@@ -951,7 +999,8 @@ static int ar231x_close(struct net_devic
 
 #endif
 
-       phy_stop(sp->phy_dev);
+       if (sp->phy_dev)
+               phy_stop(sp->phy_dev);
 
        return 0;
 }
@@ -995,6 +1044,9 @@ static int ar231x_ioctl(struct net_devic
 {
        struct ar231x_private *sp = netdev_priv(dev);
 
+       if (!sp->phy_dev)
+               return -ENODEV;
+
        switch (cmd) {
        case SIOCGMIIPHY:
        case SIOCGMIIREG: