net: add ICPlus PHY driver

The driver code was taken from Linux kernel source:
drivers/net/phy/icplus.c

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

drivers/net/phy/Makefile

@@ -35,6 +35,7 @@ COBJS-$(CONFIG_PHY_ATHEROS) += atheros.o
 COBJS-$(CONFIG_PHY_BROADCOM) += broadcom.o
 COBJS-$(CONFIG_PHY_DAVICOM) += davicom.o
 COBJS-$(CONFIG_PHY_ET1011C) += et1011c.o
+COBJS-$(CONFIG_PHY_ICPLUS) += icplus.o
 COBJS-$(CONFIG_PHY_LXT) += lxt.o
 COBJS-$(CONFIG_PHY_MARVELL) += marvell.o
 COBJS-$(CONFIG_PHY_MICREL) += micrel.o

drivers/net/phy/icplus.c

@@ -0,0 +1,94 @@
+/*
+ * ICPlus 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
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ *
+ */
+#include <phy.h>
+
+/* IP101A/G - IP1001 */
+#define IP10XX_SPEC_CTRL_STATUS         16      /* Spec. Control Register */
+#define IP1001_SPEC_CTRL_STATUS_2       20      /* IP1001 Spec. Control Reg 2 */
+#define IP1001_PHASE_SEL_MASK           3       /* IP1001 RX/TXPHASE_SEL */
+#define IP1001_APS_ON                   11      /* IP1001 APS Mode  bit */
+#define IP101A_G_APS_ON                 2       /* IP101A/G APS Mode bit */
+#define IP101A_G_IRQ_CONF_STATUS        0x11    /* Conf Info IRQ & Status Reg */
+#define IP101A_G_IRQ_PIN_USED           (1<<15) /* INTR pin used */
+#define IP101A_G_IRQ_DEFAULT            IP101A_G_IRQ_PIN_USED
+
+static int ip1001_config(struct phy_device *phydev)
+{
+	int c;
+
+	/* Enable Auto Power Saving mode */
+	c = phy_read(phydev, MDIO_DEVAD_NONE, IP1001_SPEC_CTRL_STATUS_2);
+	if (c < 0)
+		return c;
+	c |= IP1001_APS_ON;
+	c = phy_write(phydev, MDIO_DEVAD_NONE, IP1001_SPEC_CTRL_STATUS_2, c);
+	if (c < 0)
+		return c;
+
+	/* INTR pin used: speed/link/duplex will cause an interrupt */
+	c = phy_write(phydev, MDIO_DEVAD_NONE, IP101A_G_IRQ_CONF_STATUS,
+		      IP101A_G_IRQ_DEFAULT);
+	if (c < 0)
+		return c;
+
+	if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
+		/*
+		 * Additional delay (2ns) used to adjust RX clock phase
+		 * at RGMII interface
+		 */
+		c = phy_read(phydev, MDIO_DEVAD_NONE, IP10XX_SPEC_CTRL_STATUS);
+		if (c < 0)
+			return c;
+
+		c |= IP1001_PHASE_SEL_MASK;
+		c = phy_write(phydev, MDIO_DEVAD_NONE, IP10XX_SPEC_CTRL_STATUS,
+			      c);
+		if (c < 0)
+			return c;
+	}
+
+	return 0;
+}
+
+static int ip1001_startup(struct phy_device *phydev)
+{
+	genphy_update_link(phydev);
+	genphy_parse_link(phydev);
+
+	return 0;
+}
+static struct phy_driver IP1001_driver = {
+	.name = "ICPlus IP1001",
+	.uid = 0x02430d90,
+	.mask = 0x0ffffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &ip1001_config,
+	.startup = &ip1001_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+int phy_icplus_init(void)
+{
+	phy_register(&IP1001_driver);
+
+	return 0;
+}

drivers/net/phy/phy.c

@@ -433,6 +433,9 @@ int phy_init(void)
 #ifdef CONFIG_PHY_ET1011C
 	phy_et1011c_init();
 #endif
+#ifdef CONFIG_PHY_ICPLUS
+	phy_icplus_init();
+#endif
 #ifdef CONFIG_PHY_LXT
 	phy_lxt_init();
 #endif