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tlan: Isolate external PHY when using internal PHY

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When using internal 10 Mbps PHY, isolate the external PHY from MII bus.
External PHY must be kept powered up because it passes TX from tlan chip to
network.

This fixes weird link-loss problems under load with OC-2326 card at 10 Mbps.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ondrej Zary 2014-06-30 18:38:37 +02:00 committed by David S. Miller
parent e697b16b47
commit 9162e7e519
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/ti/tlan.c
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@ -2528,9 +2528,10 @@ static void tlan_phy_power_down(struct net_device *dev)
value = MII_GC_PDOWN | MII_GC_LOOPBK | MII_GC_ISOLATE;
tlan_mii_sync(dev->base_addr);
tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
if ((priv->phy_num == 0) &&
(priv->phy[1] != TLAN_PHY_NONE) &&
(!(priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10))) {
if ((priv->phy_num == 0) && (priv->phy[1] != TLAN_PHY_NONE)) {
/* if using internal PHY, the external PHY must be powered on */
if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10)
value = MII_GC_ISOLATE; /* just isolate it from MII */
tlan_mii_sync(dev->base_addr);
tlan_mii_write_reg(dev, priv->phy[1], MII_GEN_CTL, value);
}