uboot-oxnas: re-add IC+ phy driver

KD20 got an IC+ phy, without the driver the phy is not properly
initialized resulting in ethernet not working unless being already
initialized by the vendor loader.

upstream commit 368b4d2b49bbbf379d9334747fbbd2aaaafe4356
drivers: net: remove dead drivers
removed icplus.c due to the lack of in-tree users.
Partially revert that commit adding back the IC+ driver.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43508 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/boot/uboot-oxnas/files/include/configs/ox820.h

@@ -76,6 +76,7 @@
 #define CONFIG_CMD_MII
 #define CONFIG_PHYLIB
 #define CONFIG_PHY_REALTEK
+#define CONFIG_PHY_ICPLUS
 
 /* spl */
 #ifdef CONFIG_SPL_BUILD

package/boot/uboot-oxnas/patches/200-icplus-phy.patch

@@ -0,0 +1,129 @@
+From e719404ee1241af679a51879eaad291bc27e4817 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Tue, 2 Dec 2014 14:46:05 +0100
+Subject: [PATCH] net/phy: add back icplus driver
+
+IC+ phy driver was removed due to the lack of users some time ago.
+Add it back, so we can use it.
+---
+ drivers/net/phy/Makefile |  1 +
+ drivers/net/phy/icplus.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++
+ drivers/net/phy/phy.c    |  3 ++
+ 3 files changed, 84 insertions(+)
+ create mode 100644 drivers/net/phy/icplus.c
+
+--- a/drivers/net/phy/Makefile
++++ b/drivers/net/phy/Makefile
+@@ -15,6 +15,7 @@ obj-$(CONFIG_PHY_ATHEROS) += atheros.o
+ obj-$(CONFIG_PHY_BROADCOM) += broadcom.o
+ obj-$(CONFIG_PHY_DAVICOM) += davicom.o
+ obj-$(CONFIG_PHY_ET1011C) += et1011c.o
++obj-$(CONFIG_PHY_ICPLUS) += icplus.o
+ obj-$(CONFIG_PHY_LXT) += lxt.o
+ obj-$(CONFIG_PHY_MARVELL) += marvell.o
+ obj-$(CONFIG_PHY_MICREL) += micrel.o
+--- /dev/null
++++ b/drivers/net/phy/icplus.c
+@@ -0,0 +1,80 @@
++/*
++ * ICPlus PHY drivers
++ *
++ * SPDX-License-Identifier:	GPL-2.0+
++ *
++ * 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;
++}
+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -454,6 +454,9 @@ 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
+--- a/include/phy.h
++++ b/include/phy.h
+@@ -225,6 +225,7 @@ int phy_atheros_init(void);
+ int phy_broadcom_init(void);
+ int phy_davicom_init(void);
+ int phy_et1011c_init(void);
++int phy_icplus_init(void);
+ int phy_lxt_init(void);
+ int phy_marvell_init(void);
+ int phy_micrel_init(void);