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-rw-r--r--target/linux/atheros/patches-3.8/220-enet_micrel_workaround.patch86
1 files changed, 86 insertions, 0 deletions
diff --git a/target/linux/atheros/patches-3.8/220-enet_micrel_workaround.patch b/target/linux/atheros/patches-3.8/220-enet_micrel_workaround.patch
new file mode 100644
index 000000000..da8685721
--- /dev/null
+++ b/target/linux/atheros/patches-3.8/220-enet_micrel_workaround.patch
@@ -0,0 +1,86 @@
+--- a/drivers/net/ethernet/ar231x/ar231x.c
++++ b/drivers/net/ethernet/ar231x/ar231x.c
+@@ -150,6 +150,7 @@ 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 = false;
+
+ #ifndef ERR
+ #define ERR(fmt, args...) printk("%s: " fmt, __func__, ##args)
+@@ -182,6 +183,30 @@ 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;
++}
++
+ int ar231x_probe(struct platform_device *pdev)
+ {
+ struct net_device *dev;
+@@ -299,6 +324,21 @@ int ar231x_probe(struct platform_device
+
+ 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);
+@@ -355,8 +395,10 @@ 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;
+ }
+@@ -1132,6 +1174,9 @@ 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: