linux-kernel - [PATCH 5/9] tlan: Restart autonegotiation on link loss

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Date:	Tue, 27 May 2014 23:38:43 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Samuel Chessman <chessman@....org>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5/9] tlan: Restart autonegotiation on link loss

When link is lost on a card which uses internal PHY for 10 Mbit speeds,
restart autonegotiation to allow switching between 10 and 100 Mbps speeds.

Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
---
 drivers/net/ethernet/ti/tlan.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/ethernet/ti/tlan.c b/drivers/net/ethernet/ti/tlan.c
index 31d4a96..1047b3f 100644
--- a/drivers/net/ethernet/ti/tlan.c
+++ b/drivers/net/ethernet/ti/tlan.c
@@ -2721,6 +2721,7 @@ static void tlan_phy_finish_auto_neg(struct net_device *dev)
 	else if (!(mode & 0x0080) && (mode & 0x0040))
 		priv->tlan_full_duplex = true;
 
+	/* switch to internal PHY for 10 Mbps */
 	if ((!(mode & 0x0180)) &&
 	    (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) &&
 	    (priv->phy_num != 0)) {
@@ -2788,6 +2789,19 @@ static void tlan_phy_monitor(unsigned long data)
 			       dev->name);
 			tlan_dio_write8(dev->base_addr, TLAN_LED_REG, 0);
 			netif_carrier_off(dev);
+			if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) {
+				/* power down internal PHY */
+				u16 data = MII_GC_PDOWN | MII_GC_LOOPBK
+					| MII_GC_ISOLATE;
+				tlan_mii_sync(dev->base_addr);
+				tlan_mii_write_reg(dev, priv->phy[0],
+					MII_GEN_CTL, data);
+				/* set to external PHY */
+				priv->phy_num = 1;
+				/* restart autonegotiation */
+				tlan_set_timer(dev, (4*HZ/10), TLAN_TIMER_PHY_PDOWN);
+				return;
+			}
 		}
 	}
 
-- 
Ondrej Zary

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