[PATCH] emac: add support for platform-specific unsupported PHY features

This patch adds support to the ibm_emac driver for platform-specific
unsupported PHY features.

The patch attempts to determine the highest speed and duplex when
autonegotiation is unsupported.

Signed-off-by: Wade Farnsworth <wfarnsworth@mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/drivers/net/ibm_emac/ibm_emac_core.c b/drivers/net/ibm_emac/ibm_emac_core.c
index 0de3bb906174..14e9b6315f20 100644
--- a/drivers/net/ibm_emac/ibm_emac_core.c
+++ b/drivers/net/ibm_emac/ibm_emac_core.c
@@ -1875,6 +1875,9 @@ static int emac_init_device(struct ocp_device *ocpdev, struct ibm_ocp_mal *mal)
                 rc = -ENODEV;
                 goto bail;
         }
+        
+        /* Disable any PHY features not supported by the platform */
+        ep->phy_mii.def->features &= ~emacdata->phy_feat_exc;
 
         /* Setup initial PHY config & startup aneg */
         if (ep->phy_mii.def->ops->init)
@@ -1882,6 +1885,34 @@ static int emac_init_device(struct ocp_device *ocpdev, struct ibm_ocp_mal *mal)
         netif_carrier_off(ndev);
         if (ep->phy_mii.def->features & SUPPORTED_Autoneg)
                 ep->want_autoneg = 1;
+        else {
+                ep->want_autoneg = 0;
+                
+                /* Select highest supported speed/duplex */
+                if (ep->phy_mii.def->features & SUPPORTED_1000baseT_Full) {
+                        ep->phy_mii.speed = SPEED_1000;
+                        ep->phy_mii.duplex = DUPLEX_FULL;
+                } else if (ep->phy_mii.def->features & 
+                           SUPPORTED_1000baseT_Half) {
+                        ep->phy_mii.speed = SPEED_1000;
+                        ep->phy_mii.duplex = DUPLEX_HALF;
+                } else if (ep->phy_mii.def->features & 
+                           SUPPORTED_100baseT_Full) {
+                        ep->phy_mii.speed = SPEED_100;
+                        ep->phy_mii.duplex = DUPLEX_FULL;
+                } else if (ep->phy_mii.def->features & 
+                           SUPPORTED_100baseT_Half) {
+                        ep->phy_mii.speed = SPEED_100;
+                        ep->phy_mii.duplex = DUPLEX_HALF;
+                } else if (ep->phy_mii.def->features & 
+                           SUPPORTED_10baseT_Full) {
+                        ep->phy_mii.speed = SPEED_10;
+                        ep->phy_mii.duplex = DUPLEX_FULL;
+                } else {
+                        ep->phy_mii.speed = SPEED_10;
+                        ep->phy_mii.duplex = DUPLEX_HALF;
+                }
+        }
         emac_start_link(ep, NULL);
 
         /* read the MAC Address */