From b9e8692aa1fa6f6bed7e6b1cd06258c0c26db56b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 28 Apr 2009 23:27:40 +0000
Subject: [PATCH] atheros: add kernel workaround for bringing up eth1 on
 devices with a micrel switch (PHY is unconnected for ENET1, switch is not
 configurable through MDIO)

SVN-Revision: 15472
---
 .../220-enet_micrel_workaround.patch          | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 target/linux/atheros/patches-2.6.28/220-enet_micrel_workaround.patch

diff --git a/target/linux/atheros/patches-2.6.28/220-enet_micrel_workaround.patch b/target/linux/atheros/patches-2.6.28/220-enet_micrel_workaround.patch
new file mode 100644
index 000000000000..676b041feecc
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/220-enet_micrel_workaround.patch
@@ -0,0 +1,69 @@
+--- a/drivers/net/ar231x.c
++++ b/drivers/net/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 = false;
+ 
+ #ifndef ERR
+ #define ERR(fmt, args...) printk("%s: " fmt, __func__, ##args)
+@@ -279,6 +280,21 @@ int __init 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);
+@@ -335,8 +351,10 @@ static int __exit ar231x_remove(struct p
+ 	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;
+ }
+@@ -837,7 +855,12 @@ static int ar231x_rx_int(struct net_devi
+ 				dev->stats.rx_bytes += skb->len;
+ 
+ 				/* pass the packet to upper layers */
+-				sp->rx(skb);
++				if (sp->rx) {
++					sp->rx(skb);
++				} else {
++					skb->protocol = eth_type_trans(skb, skb->dev);
++					netif_rx(skb);
++				}
+ 				skb_new->dev = dev;
+ 
+ 				/* 16 bit align */
+@@ -1124,6 +1147,9 @@ 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:
-- 
2.30.2