1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/atheros/patches-3.14/220-enet_micrel_workaround.patch b/target/linux/atheros/patches-3.14/220-enet_micrel_workaround.patch
new file mode 100644
index 0000000000..dade7ee6ab
--- /dev/null
+++ b/target/linux/atheros/patches-3.14/220-enet_micrel_workaround.patch
@@ -0,0 +1,90 @@
+--- a/drivers/net/ethernet/atheros/ar231x/ar231x.c
++++ b/drivers/net/ethernet/atheros/ar231x/ar231x.c
+@@ -148,6 +148,7 @@ 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)
+@@ -180,6 +181,32 @@ 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;
+@@ -286,6 +313,23 @@ 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);
+@@ -342,8 +386,10 @@ 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;
+ }
+@@ -1104,6 +1150,9 @@ static int ar231x_ioctl(struct net_devic
+ 	struct ar231x_private *sp = netdev_priv(dev);
+ 	int ret;
+ 
++	if (!sp->phy_dev)
++		return -ENODEV;
++
+ 	switch (cmd) {
+ 	case SIOCETHTOOL:
+ 		spin_lock_irq(&sp->lock);