add support for Xilinx 1000BASE-X phy (GTX)

commit 39695029bc15041c809df3db4ba19bd729c447fa
Author: Charles Coldwell <coldwell@ll.mit.edu>
Date:   Tue Feb 19 08:27:33 2013 -0500

    Changes to support the Xilinx 1000BASE-X phy (GTX/MGT)

Signed-off-by: Charles Coldwell <coldwell@ll.mit.edu>

drivers/net/phy/phy.c

@@ -75,6 +75,10 @@ static int genphy_config_advert(struct phy_device *phydev)
 		adv |= ADVERTISE_PAUSE_CAP;
 	if (advertise & ADVERTISED_Asym_Pause)
 		adv |= ADVERTISE_PAUSE_ASYM;
+	if (advertise & ADVERTISED_1000baseX_Half)
+		adv |= ADVERTISE_1000XHALF;
+	if (advertise & ADVERTISED_1000baseX_Full)
+		adv |= ADVERTISE_1000XFULL;
 
 	if (adv != oldadv) {
 		err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
@@ -288,6 +292,7 @@ int genphy_parse_link(struct phy_device *phydev)
 	if (mii_reg & BMSR_ANEGCAPABLE) {
 		u32 lpa = 0;
 		u32 gblpa = 0;
+		u32 estatus = 0;
 
 		/* Check for gigabit capability */
 		if (mii_reg & BMSR_ERCAP) {
@@ -327,6 +332,18 @@ int genphy_parse_link(struct phy_device *phydev)
 
 		} else if (lpa & LPA_10FULL)
 			phydev->duplex = DUPLEX_FULL;
+
+		if (mii_reg & BMSR_ESTATEN)
+			estatus = phy_read(phydev, MDIO_DEVAD_NONE,
+					   MII_ESTATUS);
+
+		if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
+				ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
+			phydev->speed = SPEED_1000;
+			if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
+				phydev->duplex = DUPLEX_FULL;
+		}
+
 	} else {
 		u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 
@@ -384,6 +401,10 @@ int genphy_config(struct phy_device *phydev)
 			features |= SUPPORTED_1000baseT_Full;
 		if (val & ESTATUS_1000_THALF)
 			features |= SUPPORTED_1000baseT_Half;
+		if (val & ESTATUS_1000_XFULL)
+			features |= SUPPORTED_1000baseX_Full;
+		if (val & ESTATUS_1000_XHALF)
+			features |= SUPPORTED_1000baseX_Full;
 	}
 
 	phydev->supported = features;

include/linux/ethtool.h

@@ -580,6 +580,8 @@ enum ethtool_sfeatures_retval_bits {
 #define SUPPORTED_10000baseKX4_Full	(1 << 18)
 #define SUPPORTED_10000baseKR_Full	(1 << 19)
 #define SUPPORTED_10000baseR_FEC	(1 << 20)
+#define SUPPORTED_1000baseX_Half	(1 << 21)
+#define SUPPORTED_1000baseX_Full	(1 << 22)
 
 /* Indicates what features are advertised by the interface. */
 #define ADVERTISED_10baseT_Half		(1 << 0)
@@ -603,6 +605,8 @@ enum ethtool_sfeatures_retval_bits {
 #define ADVERTISED_10000baseKX4_Full	(1 << 18)
 #define ADVERTISED_10000baseKR_Full	(1 << 19)
 #define ADVERTISED_10000baseR_FEC	(1 << 20)
+#define ADVERTISED_1000baseX_Half	(1 << 21)
+#define ADVERTISED_1000baseX_Full	(1 << 22)
 
 /* The following are all involved in forcing a particular link
  * mode for the device for setting things.  When getting the

include/linux/mii.h

@@ -115,6 +115,8 @@
 #define EXPANSION_MFAULTS	0x0010	/* Multiple faults detected    */
 #define EXPANSION_RESV		0xffe0	/* Unused...		       */
 
+#define ESTATUS_1000_XFULL	0x8000	/* Can do 1000BX Full */
+#define ESTATUS_1000_XHALF	0x4000	/* Can do 1000BX Half */
 #define ESTATUS_1000_TFULL	0x2000	/* Can do 1000BT Full */
 #define ESTATUS_1000_THALF	0x1000	/* Can do 1000BT Half */