Fixed at91 ethernet driver for dm9161a PHY interrupt issue

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7493 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/at91-2.6/patches/010-dm9161a-phyfix.patch b/target/linux/at91-2.6/patches/010-dm9161a-phyfix.patch
new file mode 100644 (file)
index 0000000..9ad8c42
--- /dev/null
+++ b/target/linux/at91-2.6/patches/010-dm9161a-phyfix.patch
@@ -0,0 +1,28 @@
+--- linux-2.6.21.1/drivers/net/arm/at91_ether.c.old    2007-06-04 18:15:49.000000000 +0200
++++ linux-2.6.21.1/drivers/net/arm/at91_ether.c        2007-06-04 18:10:36.000000000 +0200
+@@ -146,6 +146,7 @@
+       struct at91_private *lp = netdev_priv(dev);
+       unsigned int bmsr, bmcr, lpa, mac_cfg;
+       unsigned int speed, duplex;
++      unsigned long timeout = jiffies + HZ;
+ 
+       if (!mii_link_ok(&lp->mii)) {           /* no link */
+               netif_carrier_off(dev);
+@@ -158,8 +159,15 @@
+       read_phy(lp->phy_address, MII_BMSR, &bmsr);
+       read_phy(lp->phy_address, MII_BMCR, &bmcr);
+       if (bmcr & BMCR_ANENABLE) {                             /* AutoNegotiation is enabled */
+-              if (!(bmsr & BMSR_ANEGCOMPLETE))
+-                      return;                 /* Do nothing - another interrupt generated when negotiation complete */
++              while (!(bmsr & BMSR_ANEGCOMPLETE)) {
++                      if (time_after(jiffies, timeout)) {
++                              printk("at91_ether: Auto-negotiate timeout\n");
++                              return;
++                      }
++                      read_phy(lp->phy_address, MII_BMSR, &bmsr);
++                      read_phy(lp->phy_address, MII_BMCR, &bmcr);
++                      cpu_relax();
++              }
+ 
+               read_phy(lp->phy_address, MII_LPA, &lpa);
+               if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF)) speed = SPEED_100;