net/phy: enable serdes auto-negotiation for vsc8514 phy

VSC8514 QSGMII PHY requires enabling auto-negotiation,
otherwise it wouldn't work.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

diff --git a/drivers/net/phy/vitesse.c b/drivers/net/phy/vitesse.c
index 2b29cd8..20a6746 100644 (file)
--- a/drivers/net/phy/vitesse.c
+++ b/drivers/net/phy/vitesse.c
@@ -1,8 +1,8 @@
 /*
  * Vitesse PHY drivers
  *
- * Copyright 2010-2012 Freescale Semiconductor, Inc.
- * Author: Andy Fleming
+ * Copyright 2010-2014 Freescale Semiconductor, Inc.
+ * Original Author: Andy Fleming
  * Add vsc8662 phy support - Priyanka Jain
  * SPDX-License-Identifier:    GPL-2.0+
  */
@@ -50,6 +50,7 @@
 #define MIIM_VSC8574_18G_CMDSTAT       0x8000
 
 /* Vitesse VSC8514 control register */
+#define MIIM_VSC8514_MAC_SERDES_CON     0x10
 #define MIIM_VSC8514_GENERAL18         0x12
 #define MIIM_VSC8514_GENERAL19         0x13
 #define MIIM_VSC8514_GENERAL23         0x17
@@ -246,6 +247,14 @@ static int vsc8514_config(struct phy_device *phydev)
        val = (val & 0xf8ff);
        phy_write(phydev, MDIO_DEVAD_NONE, MIIM_VSC8514_GENERAL23, val);
 
+       /* Enable Serdes Auto-negotiation */
+       phy_write(phydev, MDIO_DEVAD_NONE, PHY_EXT_PAGE_ACCESS,
+                 PHY_EXT_PAGE_ACCESS_EXTENDED3);
+       val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_VSC8514_MAC_SERDES_CON);
+       val = val | MIIM_VSC8574_MAC_SERDES_ANEG;
+       phy_write(phydev, MDIO_DEVAD_NONE, MIIM_VSC8514_MAC_SERDES_CON, val);
+       phy_write(phydev, MDIO_DEVAD_NONE, PHY_EXT_PAGE_ACCESS, 0);
+
        genphy_config_aneg(phydev);
 
        return 0;