imx: add initial version of 3.18 support

This is build tested only.

Signed-off-by: Luka Perkov <luka@openwrt.org>

SVN-Revision: 45125

2 files changed, 1072 insertions, 0 deletions

diff --git a/target/linux/imx6/files-3.18/drivers/net/phy/gw16083.c b/target/linux/imx6/files-3.18/drivers/net/phy/gw16083.c
new file mode 100644
index 0000000000..66b5536da2
--- /dev/null
+++ b/target/linux/imx6/files-3.18/drivers/net/phy/gw16083.c
@@ -0,0 +1,949 @@
+/*
+ * drivers/net/phy/gw16083.c
+ *
+ * Driver for GW16083 Ventana Ethernet Expansion Mezzanine
+ *
+ * Author: Tim Harvey
+ *
+ * Copyright (c) 2014 Tim Harvey <tharvey@gateworks.com>
+ *
+ * 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.
+ *
+ */
+
+/*
+ * The GW16083 interfaces with a Ventana baseboard via the PCIe bus, an i2c
+ * bus (i2c2), and a couple of GPIO's. On the PCIe bus is an i210 GigE with
+ * its MAC connected to Port4 of a Marvell MV88E6176 7-port GigE switch via
+ * MDIO and RGMII. Ports 0-3 are standard copper RJ45 but Ports 5 and 6
+ * connect to Marvell MV88E1111 dual-mode Copper/Fiber PHY's over SGMII and
+ * MDIO. The PHY's have both an RG45 for copper and an SFP module.
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include <linux/marvell_phy.h>
+#include <linux/of_platform.h>
+
+#include <linux/io.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+
+#include "gw16083.h"
+
+#undef FAIL_ON_CHECKSUM_ERR	/* fail to configure SFP if checksum bad */
+#define PORT_POWER_CONTROL	/* ports can be enabled/disabled via sysfs */
+#define PORT_MODE_CONTROL	/* ports 5/6 can have SFP/RJ45 mode forced */
+
+MODULE_DESCRIPTION("GW16083 driver");
+MODULE_AUTHOR("Tim Harvey");
+MODULE_LICENSE("GPL");
+
+struct mv88e1111_port_state {
+	int port;
+	bool present;
+	bool serdes;
+	bool sfp_signal;
+	bool sfp_present;
+	bool sfp_compat;
+	bool sfp_enabled;
+	char sfp_id[64];
+};
+
+struct mv88e1111_priv {
+	struct phy_device		*phydev;
+	struct i2c_client		*client;
+	struct mv88e1111_port_state	port5;
+	struct mv88e1111_port_state	port6;
+	struct kobject			*sysfs_kobj;
+};
+
+enum {
+	mode_copper = 0,
+	mode_serdes = 1,
+};
+
+static struct i2c_client *gw16083_client = NULL;
+
+static int gw16083_read_port_sfp(struct i2c_client *client,
+				 struct mv88e1111_port_state *state);
+
+/* read switch port register from port0-6 */
+u16 read_switch_port(struct phy_device *pdev, int port, u8 regaddr)
+{
+	return pdev->bus->read(pdev->bus, MV_BASE + port, regaddr);
+}
+
+/* write switch port register to port0-6 */
+int write_switch_port(struct phy_device *pdev, int port, u8 regaddr, u16 val)
+{
+	return pdev->bus->write(pdev->bus, MV_BASE + port, regaddr, val);
+}
+
+/*
+ * read_switch_port_phy - write a register for a specific port on 88E6176
+ * The 88E6176 PHY registers must be accessed thorugh the Global2 address
+ * using the SMI_PHY_COMMAND_REG and SMI_PHY_DATA_REG.
+ */
+int read_switch_port_phy(struct phy_device *pdev, int port, u8 regaddr)
+{
+	u16 reg;
+	int i;
+
+	dev_dbg(&pdev->dev, "read_phy: port%d reg=0x%02x\n", port, regaddr);
+	reg = SMIBUSY | SMIMODE22 | SMIOP_READ;
+	reg |= port << DEVADDR;
+	reg |= regaddr << REGADDR;
+	pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_COMMAND, reg);
+	for (i = 0; i < 10; i++) {
+		reg = pdev->bus->read(pdev->bus, MV_GLOBAL2,
+				      MV_SMI_PHY_COMMAND);
+		if (!(reg & (1<<15)))
+			break;
+		mdelay(1);
+	}
+	/* timeout */
+	if (i == 10)
+		return 0xffff;
+	reg = pdev->bus->read(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_DATA);
+	return reg;
+}
+
+/*
+ * write_switch_port_phy - write a register for a specific port on 88E6176
+ * The 88E6176 PHY registers must be accessed thorugh the Global2 address
+ * using the SMI_PHY_COMMAND_REG and SMI_PHY_DATA_REG.
+ */
+int write_switch_port_phy(struct phy_device *pdev, int port, u8 addr, u16 reg)
+{
+	int i;
+
+	dev_dbg(&pdev->dev, "write_phy: port%d reg=0x%02x val=0x%04x\n", port,
+		addr, reg);
+	pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_DATA, reg);
+	reg = SMIBUSY | SMIMODE22 | SMIOP_WRITE;
+	reg |= port << DEVADDR;
+	reg |= addr << REGADDR;
+	pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_COMMAND, reg);
+	for (i = 0; i < 10; i++) {
+		reg = pdev->bus->read(pdev->bus, MV_GLOBAL2,
+				      MV_SMI_PHY_COMMAND);
+		if (!(reg & (1<<15)))
+			break;
+		mdelay(1);
+	}
+	/* timeout */
+	if (i == 10)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+/* read a scratch register from switch */
+inline u8 read_switch_scratch(struct phy_device *pdev, u8 reg)
+{
+	pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SCRATCH_MISC, (reg << 8));
+	return pdev->bus->read(pdev->bus, MV_GLOBAL2, MV_SCRATCH_MISC) & 0xff;
+}
+
+/* write a scratch register to switch */
+inline void write_switch_scratch(struct phy_device *pdev, u8 reg, u8 val)
+{
+	pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SCRATCH_MISC,
+			 (1 << 15) | (reg << 8) | val);
+}
+
+/* enable or disable an SFP's TXEN signal */
+static int enable_sfp_txen(struct phy_device *pdev, int port, bool enable)
+{
+	u8 gpio;
+	int bit;
+
+	if (port != 5 && port != 6)
+		return -EINVAL;
+
+	/* GPIO[2:1] output low to enable TXEN */
+	bit = (port == 5) ? 1 : 2;
+	gpio = read_switch_scratch(pdev, MV_GPIO_DATA);
+	if (enable)
+		gpio |= (1 << bit);
+	else
+		gpio &= (1 << bit);
+	write_switch_scratch(pdev, MV_GPIO_DATA, gpio);
+	dev_info(&pdev->dev, "Port%d: SFP TX %s\n", port, enable ?
+		 "enabled" : "disabled");
+	return 0;
+}
+
+/* configure mv88e1111 port for copper or serdes
+ *  For Copper we set auto link/duplex/speed detection
+ *  For SerDes/Fiber we force 1000mbps link up and auto-neg duplex
+ */
+static int config_mv88e1111_port_sfp(struct phy_device *pdev, int port,
+				     bool sfp)
+{
+	u16 reg;
+
+	if (port != 5 && port != 6)
+		return -EINVAL;
+
+	dev_dbg(&pdev->dev, "%s: Port%d %s\n", __func__, port,
+		sfp ? "SFP" : "copper");
+	if (sfp) {
+		enable_sfp_txen(pdev, port, 1);
+
+		/* configure MV88E6176 Physical Control Port Register */
+		dev_info(&pdev->dev,
+			 "Port%d: SFP: force 1000mbps link up "
+			 "(auto-negotiate duplex)\n",
+			 port);
+		reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+		reg &= ~0x3f; /* clear 5-0 */
+		reg |= (1 << 4) | (1 << 5); /* force link up */
+		reg |= 2; /* force 1000mbps */
+		write_switch_port(pdev, port, MV_PORT_PHYS_CONTROL, reg);
+		reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+	}
+
+	/* copper */
+	else {
+		enable_sfp_txen(pdev, port, 0);
+
+		/* configure MV88E6176 Physical Control Port Register */
+		dev_info(&pdev->dev,
+			 "Port%d: Copper: set auto-neg link/duplex/speed\n",
+			 port);
+		reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+		reg &= ~0x3f; /* clear 5-0 */
+		reg |= 3; /* speed not forced */
+		write_switch_port(pdev, port, MV_PORT_PHYS_CONTROL, reg);
+		reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+	}
+	dev_dbg(&pdev->dev, "%s: Port%d %s PORT_PHYS_CONTROL=0x%04x\n",
+		__func__, port, sfp ? "SFP" : "copper",
+		read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL));
+
+	return 0;
+}
+
+#if defined(PORT_POWER_CONTROL)
+static int enable_switch_port(struct phy_device *pdev, int port, bool enable)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+	u16 reg;
+
+	/* power up port */
+	dev_info(&priv->client->dev, "Port%d: %s\n", port,
+		 enable ? "normal operation" : "power down");
+	reg = read_switch_port_phy(pdev, port, MV_PHY_CONTROL);
+	if (enable)
+		reg &= ~(1 << 11);	/* Normal Operation */
+	else
+		reg |= (1 << 11);	/* power down */
+	write_switch_port_phy(pdev, port, MV_PHY_CONTROL, reg);
+
+	reg = read_switch_port_phy(pdev, port, MV_PHY_CONTROL1);
+	if (enable)
+		reg &= ~(1 << 2);	/* Normal Operation */
+	else
+		reg |= (1 << 2);	/* power down */
+	write_switch_port_phy(pdev, port, MV_PHY_CONTROL1, reg);
+
+	return 0;
+}
+#endif
+
+/*
+ * Sysfs API
+ */
+
+struct mv88e1111_port_state *get_port_state(struct mv88e1111_priv *priv,
+					    int port)
+{
+	if (port == 5)
+		return &priv->port5;
+	if (port == 6)
+		return &priv->port6;
+	return NULL;
+}
+
+/*
+ * get MV88E6176 port number for a specific GW16083 port name
+ *  The GW16083 ports as shown on the silkscreen are not mapped according to
+ *  the MV88E6176 ports numbers.
+ */
+static int gw16083_get_port(const char* name)
+{
+	int i;
+	int map[] = { 3, 2, 1, 0, 5, 6 };
+
+	if (strncasecmp(name, "ETHERNET", 8) != 0 || strlen(name) != 9)
+		return -1;
+	i = name[8] - '0';
+	if (i < 1 || i > 6)
+		return -1;
+	return map[i-1];
+}
+
+static ssize_t port_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+	int port = -1;
+	u16 reg;
+
+	if (sscanf(attr->attr.name, "port%d", &port) != 1)
+		return 0;
+	if (port < 0 || port > 6)
+		return 0;
+	reg = read_switch_port_phy(priv->phydev, port, MV_PHY_CONTROL);
+	return sprintf(buf, "%s\n", (reg & (1 << 11)) ? "disabled" : "enabled");
+}
+
+#if defined(PORT_POWER_CONTROL)
+static ssize_t port_store(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+	int port = -1;
+	int val;
+
+	port = gw16083_get_port(attr->attr.name);
+	if (port < 0)
+		return 0;
+	if (sscanf(buf, "%d", &val) != 1)
+		return 0;
+	enable_switch_port(priv->phydev, port, val ? 1 : 0);
+	return count;
+}
+
+static DEVICE_ATTR(ethernet1, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(ethernet2, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(ethernet3, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(ethernet4, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(ethernet5, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(ethernet6, S_IWUSR | S_IRUGO, port_show, port_store);
+#else
+static DEVICE_ATTR(ethernet1, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(ethernet2, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(ethernet3, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(ethernet4, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(ethernet5, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(ethernet6, S_IRUGO, port_show, NULL);
+#endif
+
+static ssize_t portsfp_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+	struct mv88e1111_port_state *state;
+
+	state = get_port_state(priv, gw16083_get_port(attr->attr.name));
+	if (!state)
+		return 0;
+
+	if (!state->sfp_present)
+		return 0;
+
+	return sprintf(buf, "%s\n", state->sfp_id);
+}
+
+static ssize_t portmode_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+	struct mv88e1111_port_state *state;
+
+	state = get_port_state(priv, gw16083_get_port(attr->attr.name));
+	if (!state)
+		return 0;
+
+	return sprintf(buf, "%s\n", state->serdes ? "SFP" : "RJ45");
+}
+static DEVICE_ATTR(ethernet5_sfp, S_IRUGO, portsfp_show, NULL);
+static DEVICE_ATTR(ethernet6_sfp, S_IRUGO, portsfp_show, NULL);
+
+#ifdef PORT_MODE_CONTROL
+static ssize_t portmode_store(struct device *dev, struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+	struct mv88e1111_port_state *state;
+	u16 reg;
+	int port;
+
+	port = gw16083_get_port(attr->attr.name);
+	state = get_port_state(priv, port);
+	if (!state)
+		return 0;
+
+	reg = read_switch_port_phy(priv->phydev, port, MII_M1111_PHY_EXT_SR);
+	if (strcasecmp(buf, "auto") == 0) {
+		reg &= ~(1<<15); /* enable auto-selection */
+		dev_info(&priv->client->dev, "Port%d: enable auto-selection\n",
+			 port);
+	} else if (strcasecmp(buf, "RJ45") == 0) {
+		reg |= (1<<15); /* disable auto-selection */
+		reg |= 0xb; /* RGMII to Copper */
+		config_mv88e1111_port_sfp(priv->phydev, port, 0);
+		dev_info(&priv->client->dev, "Port%d: select RJ45\n", port);
+	} else if (strcasecmp(buf, "SFP") == 0) {
+		reg |= (1<<15); /* disable auto-selection */
+		reg |= 0x3; /* RGMII to Fiber */
+		config_mv88e1111_port_sfp(priv->phydev, port, 1);
+		dev_info(&priv->client->dev, "Port%d: select SFP\n", port);
+	}
+	write_switch_port_phy(priv->phydev, port, MII_M1111_PHY_EXT_SR, reg);
+
+	return count;
+}
+
+static DEVICE_ATTR(ethernet5_mode, S_IWUSR | S_IRUGO, portmode_show,
+		   portmode_store);
+static DEVICE_ATTR(ethernet6_mode, S_IWUSR | S_IRUGO, portmode_show,
+		   portmode_store);
+#else
+static DEVICE_ATTR(ethernet5_mode, S_IRUGO, portmode_show, NULL);
+static DEVICE_ATTR(ethernet6_mode, S_IRUGO, portmode_show, NULL);
+#endif
+
+
+/*
+ * PHY driver
+ */
+
+static int
+mv88e6176_config_init(struct phy_device *pdev)
+{
+	dev_dbg(&pdev->dev, "%s\n", __func__);
+	pdev->state = PHY_RUNNING;
+
+	return 0;
+}
+
+/* check MV88E1111 PHY status and MV88E6176 GPIO */
+static int
+mv88e6176_read_status(struct phy_device *pdev)
+{
+	struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+	struct mv88e1111_port_state *state;
+	bool serdes, sfp_present, sfp_signal;
+	int port;
+	int ret = 0;
+	u16 gpio;
+
+	dev_dbg(&pdev->dev, "%s", __func__);
+	gpio = read_switch_scratch(pdev, MV_GPIO_DATA);
+	for (port = 5; port < 7; port++) {
+		serdes = (read_switch_port_phy(pdev, port, MII_M1111_PHY_EXT_SR)
+			 & (1<<13)) ? 1 : 0;
+		dev_dbg(&pdev->dev, "%s: Port%d GPIO:0x%02x SerDes:%d\n",
+			__func__, port, gpio, serdes);
+		switch(port) {
+		case 5:
+			state = &priv->port5;
+			sfp_present = !((gpio >> 5) & 1);
+			sfp_signal = !((gpio >> 6) & 1);
+			break;
+		case 6:
+			state = &priv->port6;
+			sfp_present = !((gpio >> 3) & 1);
+			sfp_signal = !((gpio >> 4) & 1);
+			break;
+		}
+
+		/*
+		 * on sfp_detect read/verify SFP MSA and set sfp_compat
+		 * on sfp_signal issue link down?
+		 * on serdes auto-select
+		 */
+		if (state->sfp_present != sfp_present) {
+			state->sfp_present = sfp_present;
+			dev_info(&pdev->dev, "Port%d: SFP %s\n",
+				 port, sfp_present ? "inserted" : "removed");
+			if (state->sfp_present) {
+				if (gw16083_read_port_sfp(priv->client, state))
+					state->sfp_compat = false;
+				else
+					state->sfp_compat = true;
+			} else {
+				state->sfp_compat = false;
+				state->sfp_enabled = false;
+			}
+		}
+		if (state->sfp_signal != sfp_signal) {
+			state->sfp_signal = sfp_signal;
+			dev_info(&pdev->dev, "Port%d: SFP signal %s\n",
+				 port, sfp_signal ? "detected" : "lost");
+		}
+		if (state->serdes != serdes) {
+			state->serdes = serdes;
+			dev_info(&pdev->dev, "Port%d: %s auto-selected\n",
+				 port, serdes ? "SERDES" : "copper");
+
+			/*
+			 * if auto-selection has switched to copper
+			 * disable serdes
+			 */
+			if (!serdes) {
+				config_mv88e1111_port_sfp(pdev, port, 0);
+				state->sfp_enabled = false;
+			}
+		}
+
+		/*
+		 * if serdes and compatible SFP module and not yet enabled
+		 * then enable for serdes
+		 */
+		if (serdes && state->sfp_compat && state->sfp_signal &&
+		    !state->sfp_enabled)
+		{
+			if (!config_mv88e1111_port_sfp(pdev, port, 1))
+				state->sfp_enabled = true;
+		}
+	}
+
+	return ret;
+}
+
+static int
+mv88e6176_config_aneg(struct phy_device *pdev)
+{
+	dev_dbg(&pdev->dev, "%s", __func__);
+	return 0;
+}
+
+static void
+mv88e6176_remove(struct phy_device *pdev)
+{
+	dev_dbg(&pdev->dev, "%s", __func__);
+
+	device_remove_file(&pdev->dev, &dev_attr_ethernet1);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet2);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet3);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet4);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet5);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet6);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet5_sfp);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet6_sfp);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet5_mode);
+	device_remove_file(&pdev->dev, &dev_attr_ethernet6_mode);
+	sysfs_remove_link(kernel_kobj, "gw16083");
+}
+
+static int
+mv88e6176_probe(struct phy_device *pdev)
+{
+	int port;
+	int ret = 0;
+	u32 id, reg;
+	struct mv88e1111_priv *priv;
+
+	dev_dbg(&pdev->dev, "%s: addr=0x%02x bus=%s:%s gw16083_client=%p\n",
+		__func__, pdev->addr, pdev->bus->name, pdev->bus->id,
+		gw16083_client);
+
+	/* In single-chip addressing mode the MV88E6176 shows up on 0x10-0x16 */
+	if (pdev->addr != MV_BASE)
+		return 0;
+
+	/* i2c driver needs to be loaded first */
+	if (!gw16083_client)
+		return 0;
+
+	/* gw16083 has MV88E1676 hanging off of i210 mdio bus */
+	if (strcmp(pdev->bus->name, "igb_enet_mii_bus") != 0)
+		return 0;
+
+	//dev_info(&pdev->dev, "Detected");
+	dev_info(&gw16083_client->dev, "%s: MV88E6176 7-port switch detected",
+		 pdev->bus->id);
+
+	/*
+	 * port5/6 config: MV88E1111 PHY
+	 * Register 20: PHY Control Register
+	 *   R20_7: add delay to RX_CLK for RXD
+	 *   R20_1: add delay to TX_CLK for TXD
+	 * Register 24: LED Control Register
+	 *   0x4111:
+	 *     Pulse stretch 170 to 340 ms
+	 * Register 0: Control Register
+	 *   R0_15: phy reset
+	 */
+	for (port = 5; port < 7; port++) {
+#ifndef RGMII_DELAY_ON_PHY
+		write_switch_port(pdev, port, MV_PORT_PHYS_CONTROL, 0xC003);
+#endif
+
+		id = read_switch_port_phy(pdev, port,
+					  MII_M1111_PHY_IDENT0) << 16;
+		id |= read_switch_port_phy(pdev, port, MII_M1111_PHY_IDENT1);
+		if ((id & MII_M1111_PHY_ID_MASK) != MII_M1111_PHY_ID) {
+			dev_err(&gw16083_client->dev,
+				"Port%d: No MV88E1111 PHY detected", port);
+			return 0;
+			//continue;
+		}
+
+#ifdef RGMII_DELAY_ON_PHY
+		/* phy rx/tx delay */
+		reg = read_switch_port_phy(pdev, port, MII_M1111_PHY_EXT_CR);
+		reg |= (1<<1) | (1<<7);
+		write_switch_port_phy(pdev, port, MII_M1111_PHY_EXT_CR, reg);
+#endif
+		/* led config */
+		write_switch_port_phy(pdev, port, MII_M1111_PHY_LED_CONTROL,
+				      MII_M1111_PHY_LED_PULSE_STR);
+		/* reset phy */
+		reg = read_switch_port_phy(pdev, port, MII_M1111_PHY_CONTROL);
+		reg |= MII_M1111_PHY_CONTROL_RESET;
+		write_switch_port_phy(pdev, port, MII_M1111_PHY_CONTROL, reg);
+		dev_info(&gw16083_client->dev,
+			 "Port%d MV88E111 PHY configured\n", port);
+	}
+
+	/*
+	 * GPIO Configuration:
+	 *  GPIO1: FIB5_TXEN# (output)
+	 *  GPIO2: FIB6_TXEN# (output)
+	 *  GPIO3: FIB6_PRES# (input)
+	 *  GPIO4: FIB6_LOS   (input)
+	 *  GPIO5: FIB5_PRES# (input)
+	 *  GPIO6: FIB5_LOS   (input)
+	 */
+	write_switch_scratch(pdev, MV_GPIO_DATA, 0x06); /* GPIO[2:1] out hi */
+	write_switch_scratch(pdev, MV_GPIO_DIR,  0x78); /* GPIO[6:3] inp */
+
+	pdev->irq = PHY_POLL;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	memset(priv, 0, sizeof(*priv));
+	priv->phydev = pdev;
+	priv->client = gw16083_client;
+	priv->port5.port = 5;
+	priv->port6.port = 6;
+	dev_set_drvdata(&pdev->dev, priv);
+
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet1);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet2);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet3);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet4);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet5);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet6);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet5_sfp);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet6_sfp);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet5_mode);
+	ret |= device_create_file(&pdev->dev, &dev_attr_ethernet6_mode);
+
+	if (unlikely(ret))
+		dev_err(&pdev->dev, "Failed creating attrs\n");
+
+	/* Add a nice symlink to the real device */
+	ret = sysfs_create_link(kernel_kobj, &pdev->dev.kobj, "gw16083");
+
+	dev_dbg(&pdev->dev, "initial state: GPIO=0x%02x "
+		"Port5_serdes=%d Port6_serdes=%d\n",
+		read_switch_scratch(pdev, MV_GPIO_DATA),
+		(read_switch_port_phy(pdev, 5, MII_M1111_PHY_EXT_SR)
+		 & (1<<13) ? 1:0),
+		(read_switch_port_phy(pdev, 6, MII_M1111_PHY_EXT_SR)
+		 & (1<<13) ? 1:0));
+
+	return ret;
+}
+
+static struct phy_driver mv88e6176_phy_driver = {
+	.name		= "MV88E6176",
+	.phy_id		= MV_IDENT_VALUE,
+	.phy_id_mask	= MV_IDENT_MASK,
+	.features	= PHY_BASIC_FEATURES,
+	.probe		= &mv88e6176_probe,
+	.remove		= &mv88e6176_remove,
+	.config_init	= &mv88e6176_config_init,
+	.config_aneg	= &mv88e6176_config_aneg,
+	.read_status	= &mv88e6176_read_status,
+	.driver		= { .owner = THIS_MODULE },
+};
+
+/*
+ * I2C driver
+ */
+
+/* See SFF-8472 */
+struct sfp_msa {
+	/* Basic ID fields */
+	u8	identifier;
+	u8	ext_identifier;
+	u8	connector;
+	u8	transceiver[8];
+	u8	encoding;
+	u8	br_nominal;
+	u8	rate_identifier;
+	u8	length_smf_km;
+	u8	length_smf;
+	u8	length_om2;
+	u8	length_om1;
+	u8	length_om4;
+	u8	length_om3;
+	u8	vendor_name[16];
+	u8	transceiver2;
+	u8	vendor_oui[3];
+	u8	vendor_pn[16];
+	u8	vendor_rev[4];
+	u8	wavelength[2];
+	u8	resv1;
+	u8	cc_base;
+
+	/* extended id fields */
+	u8	options[2];
+	u8	br_max;
+	u8	br_min;
+	u8	vendor_sn[16];
+	u8	date_code[8];
+	u8	diags_type;
+	u8	enhanced_options;
+	u8	sff8472_compliance;
+	u8	cc_ext;
+
+	/* Vendor specific ID fields */
+	u8	vendor_data[32];
+	u8	sff8079[128];
+};
+
+enum identifier {
+	UNKNOWN,
+	GBIC,
+	SFF,
+	SFP,
+	XBI,
+	XENPACK,
+	XFP,
+	XFF,
+	XFP_E,
+	XPAK,
+	X2,
+	DWDM_SFP,
+	QSFP,
+	MAX_ID,
+};
+
+const char* id_names[] = {
+	"UNKONWN",
+	"GBIC",
+	"SFF",
+	"SFP",
+	NULL,
+};
+
+/* Flags for SFP modules compatible with ETH up to 1Gb */
+struct sfp_flags {
+	u8 e1000_base_sx:1;
+	u8 e1000_base_lx:1;
+	u8 e1000_base_cx:1;
+	u8 e1000_base_t:1;
+	u8 e100_base_lx:1;
+	u8 e100_base_fx:1;
+	u8 e10_base_bx10:1;
+	u8 e10_base_px:1;
+};
+
+#define STRING_APPEND(str, src)				\
+	strncat(str, src, sizeof(src));			\
+	for (i = 1; i < sizeof(str); i++)		\
+		if (str[i-1] == ' ' && str[i] == ' ')	\
+			str[i] = 0;
+
+static int gw16083_read_port_sfp(struct i2c_client *client,
+				 struct mv88e1111_port_state *state)
+{
+	int ret = 0;
+	u8 data[256];
+	struct sfp_flags *eth_flags;
+	u8 crc;
+	int i;
+	u8 *str;
+	struct sfp_msa *sfp_msa = (struct sfp_msa *)data;
+	int port = state->port;
+	union i2c_smbus_data d;
+
+	dev_dbg(&client->dev, "%s Port%d\n", __func__, port);
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_READ_I2C_BLOCK))
+		return -ENODEV;
+	d.byte = (port == 5) ? 1 : 2;
+	if (i2c_smbus_xfer(client->adapter, GW16083_I2C_ADDR_PCA9543,
+			   client->flags, I2C_SMBUS_WRITE, 0,
+			   I2C_SMBUS_BYTE_DATA, &d) < 0)
+	{
+		dev_err(&client->dev,
+			"Port%d: failed writing PCA9543 register\n", port);
+		return ret;
+	}
+
+	/* read all 256 bytes of SFP EEPROM */
+	for (i = 0; i < sizeof(data); i += I2C_SMBUS_BLOCK_MAX) {
+		d.block[0] = I2C_SMBUS_BLOCK_MAX;
+		if (i2c_smbus_xfer(client->adapter, GW16083_I2C_ADDR_SFP1,
+				   client->flags, I2C_SMBUS_READ, i,
+				   I2C_SMBUS_I2C_BLOCK_DATA, &d) < 0)
+		{
+			dev_err(&client->dev,
+				"Port%d: failed reading SFP data\n", port);
+			return ret;
+		}
+		memcpy(data + i, d.block + 1, I2C_SMBUS_BLOCK_MAX);
+	}
+
+	/* Validate checksums */
+	for (crc = 0, i = 0; i < 63; i++)
+		crc += data[i];
+	if (crc != sfp_msa->cc_base) {
+		dev_err(&client->dev, "Port%d: "
+			"Checksum failure for Base ID fields: 0x%02x\n", port,
+			crc);
+#ifdef FAIL_ON_CHECKSUM_ERR
+		return -EINVAL;
+#endif
+	}
+	for (crc = 0, i = 64; i < 95; i++)
+		crc += data[i];
+	if (crc != sfp_msa->cc_ext) {
+		dev_err(&client->dev, "Port%d: "
+			"Checksum failure for Extended ID fields: 0x%02x\n",
+			port, crc);
+#ifdef FAIL_ON_CHECKSUM_ERR
+		return -EINVAL;
+#endif
+	}
+	state->sfp_id[0] = 0;
+	for (i = 0; id_names[i]; i++) {
+		if (sfp_msa->identifier == i) {
+			sprintf(state->sfp_id, "%s: ", id_names[i]);
+			break;
+		}
+	}
+	STRING_APPEND(state->sfp_id, sfp_msa->vendor_oui);
+	STRING_APPEND(state->sfp_id, sfp_msa->vendor_name);
+	STRING_APPEND(state->sfp_id, sfp_msa->vendor_pn);
+	STRING_APPEND(state->sfp_id, sfp_msa->vendor_rev);
+	STRING_APPEND(state->sfp_id, sfp_msa->vendor_sn);
+	dev_info(&client->dev, "Port%d: %s\n", port, state->sfp_id);
+
+	if ((sfp_msa->identifier != GBIC) &&
+	    (sfp_msa->identifier != SFF) &&
+	    (sfp_msa->identifier != SFP))
+	{
+		dev_err(&client->dev, "Port%d: Unknown module identifier: %d\n",
+			port, sfp_msa->identifier);
+		return -EINVAL;
+	}
+
+	str = "";
+	eth_flags = (struct sfp_flags *)(sfp_msa->transceiver + 3);
+	if (eth_flags->e1000_base_sx) {
+		str = "1000Base-SX (Fiber)";
+	} else if (eth_flags->e1000_base_lx) {
+		str = "1000Base-LX (Fiber)";
+	} else if (eth_flags->e1000_base_t) {
+		str = "1000Base-T (Copper)";
+	} else if (eth_flags->e100_base_fx) {
+		str = "100Base-FX (Fiber) - not supported";
+		ret = -EINVAL;
+	} else {
+		str = "Unknown/Unsupported media type";
+		ret = -EINVAL;
+	}
+	if (ret)
+		dev_err(&client->dev, "Port%d: %s (0x%02x)\n", port, str,
+			sfp_msa->transceiver[3]);
+	else
+		dev_info(&client->dev, "Port%d: %s (0x%02x)\n", port, str,
+			sfp_msa->transceiver[3]);
+
+	return ret;
+}
+
+static int gw16083_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	int ret;
+
+	dev_info(&client->dev, "GW16083 Ethernet Expansion Mezzanine\n");
+	if (gw16083_client) {
+		dev_err(&client->dev, "client already registered\n");
+		return -EINVAL;
+	}
+	gw16083_client = client;
+
+	ret = phy_driver_register(&mv88e6176_phy_driver);
+	if (ret)
+		dev_err(&client->dev,
+			"failed to register mv88e6176 phy driver: %d\n", ret);
+	return ret;
+}
+
+static int gw16083_remove(struct i2c_client *client)
+{
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	phy_driver_unregister(&mv88e6176_phy_driver);
+	gw16083_client = NULL;
+	return 0;
+}
+
+static const struct of_device_id gw16083_dt_ids[] = {
+	{ .compatible = "gateworks,gw16083", },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, gw16083_dt_ids);
+
+static const struct i2c_device_id gw16083_id[] = {
+	{ "gw16083", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, gw16083_id);
+
+static struct i2c_driver gw16083_driver = {
+	.driver = {
+		.name	= "gw16083",
+		.of_match_table = gw16083_dt_ids,
+	},
+	.probe		= gw16083_probe,
+	.remove		= gw16083_remove,
+	.id_table	= gw16083_id,
+};
+
+static int __init mv88e6176_init(void)
+{
+	return i2c_add_driver(&gw16083_driver);
+}
+
+static void __exit mv88e6176_exit(void)
+{
+	i2c_del_driver(&gw16083_driver);
+}
+
+module_init(mv88e6176_init);
+module_exit(mv88e6176_exit);
diff --git a/target/linux/imx6/files-3.18/drivers/net/phy/gw16083.h b/target/linux/imx6/files-3.18/drivers/net/phy/gw16083.h
new file mode 100644
index 0000000000..db96f2b7b3
--- /dev/null
+++ b/target/linux/imx6/files-3.18/drivers/net/phy/gw16083.h
@@ -0,0 +1,123 @@
+/*
+ * drivers/net/phy/mv88e6176.h
+ *
+ * Driver for Marvell Switch
+ *
+ * Author: Tim Harvey
+ *
+ * Copyright (c) 2014 Tim Harvey <tharvey@gateworks.com>
+ *
+ * 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.
+ *
+ */
+
+#ifndef _GW16083_H_
+#define _GW16083_H_
+
+#define MII_MARVELL_PHY_PAGE		22
+
+/*
+ * I2C Addresses
+ */
+#define GW16083_I2C_ADDR_SFP1		0x50
+#define GW16083_I2C_ADDR_SFP2		0x51
+#define GW16083_I2C_ADDR_EEPROM		0x52
+#define GW16083_I2C_ADDR_PCA9543	0x70
+
+/*
+ * MV88E1111 PHY Registers
+ */
+enum {
+	MII_M1111_PHY_CONTROL		= 0,
+	MII_M1111_PHY_STATUS 		= 1,
+	MII_M1111_PHY_IDENT0		= 2,
+	MII_M1111_PHY_IDENT1		= 3,
+	MII_M1111_PHY_EXT_CR		= 20,
+	MII_M1111_PHY_LED_CONTROL	= 24,
+	MII_M1111_PHY_EXT_SR		= 27,
+};
+
+#define MII_M1111_PHY_ID_MASK		0xfffffff0
+#define MII_M1111_PHY_ID		0x01410cc0
+
+#define MII_M1111_PHY_CONTROL_RESET	(1 << 15)
+#define MII_M1111_PHY_LED_DIRECT	0x4100
+#define MII_M1111_PHY_LED_PULSE_STR	0x4111
+#define MII_M1111_PHY_LED_COMBINE	0x411c
+#define MII_M1111_RX_DELAY		0x80
+#define MII_M1111_TX_DELAY		0x2
+
+/*
+ * MV88E6176 Switch Registers
+ */
+
+/* PHY Addrs */
+#define MV_BASE		0x10
+#define MV_GLOBAL1	0x1b
+#define MV_GLOBAL2	0x1c
+#define MV_GLOBAL3	0x1d
+
+/* Global2 Registers */
+enum {
+	MV_SMI_PHY_COMMAND	= 0x18,
+	MV_SMI_PHY_DATA		= 0x19,
+	MV_SCRATCH_MISC		= 0x1A,
+};
+
+/* Scratch And Misc Reg offsets */
+enum {
+	MV_GPIO_MODE		= 0x60,
+	MV_GPIO_DIR		= 0x62,
+	MV_GPIO_DATA		= 0x64,
+	MV_GPIO76_CNTL		= 0x6B,
+	MV_GPIO54_CNTL		= 0x6A,
+	MV_GPIO32_CNTL		= 0x69,
+	MV_GPIO10_CNTL		= 0x68,
+	MV_CONFIG0		= 0x70,
+	MV_CONFIG1		= 0x71,
+	MV_CONFIG2		= 0x72,
+	MV_CONFIG3		= 0x73,
+};
+
+/* PHY Registers */
+enum {
+	MV_PHY_CONTROL      = 0x00,
+	MV_PHY_STATUS       = 0x01,
+	MV_PHY_IDENT0       = 0x02,
+	MV_PHY_IDENT1       = 0x03,
+	MV_PHY_ANEG         = 0x04,
+	MV_PHY_LINK_ABILITY = 0x05,
+	MV_PHY_ANEG_EXPAND  = 0x06,
+	MV_PHY_XMIT_NEXTP   = 0x07,
+	MV_PHY_LINK_NEXTP   = 0x08,
+	MV_PHY_CONTROL1     = 0x10,
+	MV_PHY_STATUS1      = 0x11,
+	MV_PHY_INTR_EN      = 0x12,
+};
+
+/* Port Registers */
+enum {
+	MV_PORT_STATUS      	= 0x00,
+	MV_PORT_PHYS_CONTROL	= 0x01,
+	MV_PORT_IDENT       	= 0x03,
+	MV_PORT_CONTROL     	= 0x04,
+	MV_PORT_VLANMAP     	= 0x06,
+	MV_PORT_ASSOC       	= 0x0b,
+	MV_PORT_RXCOUNT     	= 0x10,
+	MV_PORT_TXCOUNT     	= 0x11,
+};
+
+#define SMIBUSY		(1<<15)
+#define SMIMODE22	(1<<12)
+#define SMIOP_READ	(2<<10)
+#define SMIOP_WRITE	(1<<10)
+#define DEVADDR		5
+#define REGADDR		0
+
+#define MV_IDENT_MASK		0x0000fff0
+#define MV_IDENT_VALUE		0x00001760
+
+#endif /* _GW16083_H_ */