phy: Add support for SMSC LAN87xx PHYs

This adds support for the SMSC LAN87xx PHYs.

Following PHYs can be used by set CONFIG_PHY_SMSC to config.
 - SMSC LAN8700
 - SMSC LAN8710/LAN8720
 - SMSC LAN8710/LAN8720

A setup of PHY was copied from linux kenrel.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Fixed white space errors; modified commit message a bit.
Signed-off-by: Wolfgang Denk <wd@denx.de>

drivers/net/phy/Makefile

@@ -38,6 +38,7 @@ COBJS-$(CONFIG_PHY_MARVELL) += marvell.o
 COBJS-$(CONFIG_PHY_MICREL) += micrel.o
 COBJS-$(CONFIG_PHY_NATSEMI) += natsemi.o
 COBJS-$(CONFIG_PHY_REALTEK) += realtek.o
+COBJS-$(CONFIG_PHY_SMSC) += smsc.o
 COBJS-$(CONFIG_PHY_TERANETICS) += teranetics.o
 COBJS-$(CONFIG_PHY_VITESSE) += vitesse.o
 

drivers/net/phy/phy.c

@@ -444,6 +444,9 @@ int phy_init(void)
 #ifdef CONFIG_PHY_REALTEK
 	phy_realtek_init();
 #endif
+#ifdef CONFIG_PHY_SMSC
+	phy_smsc_init();
+#endif
 #ifdef CONFIG_PHY_TERANETICS
 	phy_teranetics_init();
 #endif

drivers/net/phy/smsc.c

@@ -0,0 +1,92 @@
+/*
+ * SMSC PHY drivers
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Base code from drivers/net/phy/davicom.c
+ *   Copyright 2010-2011 Freescale Semiconductor, Inc.
+ *   author Andy Fleming
+ *
+ * Some code get from linux kenrel
+ * Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
+ *
+ */
+#include <miiphy.h>
+
+static int smsc_parse_status(struct phy_device *phydev)
+{
+	int mii_reg;
+
+	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+
+	if (mii_reg & (BMSR_100FULL | BMSR_100HALF))
+		phydev->speed = SPEED_100;
+	else
+		phydev->speed = SPEED_10;
+
+	if (mii_reg & (BMSR_10FULL | BMSR_100FULL))
+		phydev->duplex = DUPLEX_FULL;
+	else
+		phydev->duplex = DUPLEX_HALF;
+
+	return 0;
+}
+
+static int smsc_startup(struct phy_device *phydev)
+{
+	genphy_update_link(phydev);
+	smsc_parse_status(phydev);
+	return 0;
+}
+
+static struct phy_driver lan8700_driver = {
+	.name = "SMSC LAN8700",
+	.uid = 0x0007c0c0,
+	.mask = 0xffff0,
+	.features = PHY_BASIC_FEATURES,
+	.config = &genphy_config_aneg,
+	.startup = &smsc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver lan911x_driver = {
+	.name = "SMSC LAN911x Internal PHY",
+	.uid = 0x0007c0d0,
+	.mask = 0xffff0,
+	.features = PHY_BASIC_FEATURES,
+	.config = &genphy_config_aneg,
+	.startup = &smsc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver lan8710_driver = {
+	.name = "SMSC LAN8710/LAN8720",
+	.uid = 0x0007c0f0,
+	.mask = 0xffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &genphy_config_aneg,
+	.startup = &smsc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+int phy_smsc_init(void)
+{
+	phy_register(&lan8710_driver);
+	phy_register(&lan911x_driver);
+	phy_register(&lan8700_driver);
+
+	return 0;
+}