/*
 * AMD 10Gb Ethernet driver
 *
 * This file is available to you under your choice of the following two
 * licenses:
 *
 * License 1: GPLv2
 *
 * Copyright (c) 2016 Advanced Micro Devices, Inc.
 *
 * This file is free software; you may copy, redistribute 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 file 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, see <http://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
 *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
 *     Inc. unless otherwise expressly agreed to in writing between Synopsys
 *     and you.
 *
 *     The Software IS NOT an item of Licensed Software or Licensed Product
 *     under any End User Software License Agreement or Agreement for Licensed
 *     Product with Synopsys or any supplement thereto.  Permission is hereby
 *     granted, free of charge, to any person obtaining a copy of this software
 *     annotated with this license and the Software, to deal in the Software
 *     without restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *     of the Software, and to permit persons to whom the Software is furnished
 *     to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included
 *     in all copies or substantial portions of the Software.
 *
 *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 *     THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * License 2: Modified BSD
 *
 * Copyright (c) 2016 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Advanced Micro Devices, Inc. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
 *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
 *     Inc. unless otherwise expressly agreed to in writing between Synopsys
 *     and you.
 *
 *     The Software IS NOT an item of Licensed Software or Licensed Product
 *     under any End User Software License Agreement or Agreement for Licensed
 *     Product with Synopsys or any supplement thereto.  Permission is hereby
 *     granted, free of charge, to any person obtaining a copy of this software
 *     annotated with this license and the Software, to deal in the Software
 *     without restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *     of the Software, and to permit persons to whom the Software is furnished
 *     to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included
 *     in all copies or substantial portions of the Software.
 *
 *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 *     THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/kmod.h>
#include <linux/mdio.h>
#include <linux/phy.h>

#include "xgbe.h"
#include "xgbe-common.h"

#define XGBE_PHY_PORT_SPEED_100		BIT(0)
#define XGBE_PHY_PORT_SPEED_1000	BIT(1)
#define XGBE_PHY_PORT_SPEED_2500	BIT(2)
#define XGBE_PHY_PORT_SPEED_10000	BIT(3)

#define XGBE_MUTEX_RELEASE		0x80000000

#define XGBE_SFP_DIRECT			7

/* I2C target addresses */
#define XGBE_SFP_SERIAL_ID_ADDRESS	0x50
#define XGBE_SFP_DIAG_INFO_ADDRESS	0x51
#define XGBE_SFP_PHY_ADDRESS		0x56
#define XGBE_GPIO_ADDRESS_PCA9555	0x20

/* SFP sideband signal indicators */
#define XGBE_GPIO_NO_TX_FAULT		BIT(0)
#define XGBE_GPIO_NO_RATE_SELECT	BIT(1)
#define XGBE_GPIO_NO_MOD_ABSENT		BIT(2)
#define XGBE_GPIO_NO_RX_LOS		BIT(3)

/* Rate-change complete wait/retry count */
#define XGBE_RATECHANGE_COUNT		500

enum xgbe_port_mode {
	XGBE_PORT_MODE_RSVD = 0,
	XGBE_PORT_MODE_BACKPLANE,
	XGBE_PORT_MODE_BACKPLANE_2500,
	XGBE_PORT_MODE_1000BASE_T,
	XGBE_PORT_MODE_1000BASE_X,
	XGBE_PORT_MODE_NBASE_T,
	XGBE_PORT_MODE_10GBASE_T,
	XGBE_PORT_MODE_10GBASE_R,
	XGBE_PORT_MODE_SFP,
	XGBE_PORT_MODE_MAX,
};

enum xgbe_conn_type {
	XGBE_CONN_TYPE_NONE = 0,
	XGBE_CONN_TYPE_SFP,
	XGBE_CONN_TYPE_MDIO,
	XGBE_CONN_TYPE_RSVD1,
	XGBE_CONN_TYPE_BACKPLANE,
	XGBE_CONN_TYPE_MAX,
};

/* SFP/SFP+ related definitions */
enum xgbe_sfp_comm {
	XGBE_SFP_COMM_DIRECT = 0,
	XGBE_SFP_COMM_PCA9545,
};

enum xgbe_sfp_cable {
	XGBE_SFP_CABLE_UNKNOWN = 0,
	XGBE_SFP_CABLE_ACTIVE,
	XGBE_SFP_CABLE_PASSIVE,
};

enum xgbe_sfp_base {
	XGBE_SFP_BASE_UNKNOWN = 0,
	XGBE_SFP_BASE_1000_T,
	XGBE_SFP_BASE_1000_SX,
	XGBE_SFP_BASE_1000_LX,
	XGBE_SFP_BASE_1000_CX,
	XGBE_SFP_BASE_10000_SR,
	XGBE_SFP_BASE_10000_LR,
	XGBE_SFP_BASE_10000_LRM,
	XGBE_SFP_BASE_10000_ER,
	XGBE_SFP_BASE_10000_CR,
};

enum xgbe_sfp_speed {
	XGBE_SFP_SPEED_UNKNOWN = 0,
	XGBE_SFP_SPEED_100_1000,
	XGBE_SFP_SPEED_1000,
	XGBE_SFP_SPEED_10000,
};

/* SFP Serial ID Base ID values relative to an offset of 0 */
#define XGBE_SFP_BASE_ID			0
#define XGBE_SFP_ID_SFP				0x03

#define XGBE_SFP_BASE_EXT_ID			1
#define XGBE_SFP_EXT_ID_SFP			0x04

#define XGBE_SFP_BASE_10GBE_CC			3
#define XGBE_SFP_BASE_10GBE_CC_SR		BIT(4)
#define XGBE_SFP_BASE_10GBE_CC_LR		BIT(5)
#define XGBE_SFP_BASE_10GBE_CC_LRM		BIT(6)
#define XGBE_SFP_BASE_10GBE_CC_ER		BIT(7)

#define XGBE_SFP_BASE_1GBE_CC			6
#define XGBE_SFP_BASE_1GBE_CC_SX		BIT(0)
#define XGBE_SFP_BASE_1GBE_CC_LX		BIT(1)
#define XGBE_SFP_BASE_1GBE_CC_CX		BIT(2)
#define XGBE_SFP_BASE_1GBE_CC_T			BIT(3)

#define XGBE_SFP_BASE_CABLE			8
#define XGBE_SFP_BASE_CABLE_PASSIVE		BIT(2)
#define XGBE_SFP_BASE_CABLE_ACTIVE		BIT(3)

#define XGBE_SFP_BASE_BR			12
#define XGBE_SFP_BASE_BR_1GBE_MIN		0x0a
#define XGBE_SFP_BASE_BR_1GBE_MAX		0x0d
#define XGBE_SFP_BASE_BR_10GBE_MIN		0x64
#define XGBE_SFP_BASE_BR_10GBE_MAX		0x68

#define XGBE_SFP_BASE_CU_CABLE_LEN		18

#define XGBE_SFP_BASE_VENDOR_NAME		20
#define XGBE_SFP_BASE_VENDOR_NAME_LEN		16
#define XGBE_SFP_BASE_VENDOR_PN			40
#define XGBE_SFP_BASE_VENDOR_PN_LEN		16
#define XGBE_SFP_BASE_VENDOR_REV		56
#define XGBE_SFP_BASE_VENDOR_REV_LEN		4

#define XGBE_SFP_BASE_CC			63

/* SFP Serial ID Extended ID values relative to an offset of 64 */
#define XGBE_SFP_BASE_VENDOR_SN			4
#define XGBE_SFP_BASE_VENDOR_SN_LEN		16

#define XGBE_SFP_EXTD_DIAG			28
#define XGBE_SFP_EXTD_DIAG_ADDR_CHANGE		BIT(2)

#define XGBE_SFP_EXTD_SFF_8472			30

#define XGBE_SFP_EXTD_CC			31

struct xgbe_sfp_eeprom {
	u8 base[64];
	u8 extd[32];
	u8 vendor[32];
};

#define XGBE_BEL_FUSE_VENDOR	"BEL-FUSE        "
#define XGBE_BEL_FUSE_PARTNO	"1GBT-SFP06      "

struct xgbe_sfp_ascii {
	union {
		char vendor[XGBE_SFP_BASE_VENDOR_NAME_LEN + 1];
		char partno[XGBE_SFP_BASE_VENDOR_PN_LEN + 1];
		char rev[XGBE_SFP_BASE_VENDOR_REV_LEN + 1];
		char serno[XGBE_SFP_BASE_VENDOR_SN_LEN + 1];
	} u;
};

/* MDIO PHY reset types */
enum xgbe_mdio_reset {
	XGBE_MDIO_RESET_NONE = 0,
	XGBE_MDIO_RESET_I2C_GPIO,
	XGBE_MDIO_RESET_INT_GPIO,
	XGBE_MDIO_RESET_MAX,
};

/* Re-driver related definitions */
enum xgbe_phy_redrv_if {
	XGBE_PHY_REDRV_IF_MDIO = 0,
	XGBE_PHY_REDRV_IF_I2C,
	XGBE_PHY_REDRV_IF_MAX,
};

enum xgbe_phy_redrv_model {
	XGBE_PHY_REDRV_MODEL_4223 = 0,
	XGBE_PHY_REDRV_MODEL_4227,
	XGBE_PHY_REDRV_MODEL_MAX,
};

enum xgbe_phy_redrv_mode {
	XGBE_PHY_REDRV_MODE_CX = 5,
	XGBE_PHY_REDRV_MODE_SR = 9,
};

#define XGBE_PHY_REDRV_MODE_REG	0x12b0

/* PHY related configuration information */
struct xgbe_phy_data {
	enum xgbe_port_mode port_mode;

	unsigned int port_id;

	unsigned int port_speeds;

	enum xgbe_conn_type conn_type;

	enum xgbe_mode cur_mode;
	enum xgbe_mode start_mode;

	unsigned int rrc_count;

	unsigned int mdio_addr;

	unsigned int comm_owned;

	/* SFP Support */
	enum xgbe_sfp_comm sfp_comm;
	unsigned int sfp_mux_address;
	unsigned int sfp_mux_channel;

	unsigned int sfp_gpio_address;
	unsigned int sfp_gpio_mask;
	unsigned int sfp_gpio_rx_los;
	unsigned int sfp_gpio_tx_fault;
	unsigned int sfp_gpio_mod_absent;
	unsigned int sfp_gpio_rate_select;

	unsigned int sfp_rx_los;
	unsigned int sfp_tx_fault;
	unsigned int sfp_mod_absent;
	unsigned int sfp_diags;
	unsigned int sfp_changed;
	unsigned int sfp_phy_avail;
	unsigned int sfp_cable_len;
	enum xgbe_sfp_base sfp_base;
	enum xgbe_sfp_cable sfp_cable;
	enum xgbe_sfp_speed sfp_speed;
	struct xgbe_sfp_eeprom sfp_eeprom;

	/* External PHY support */
	enum xgbe_mdio_mode phydev_mode;
	struct mii_bus *mii;
	struct phy_device *phydev;
	enum xgbe_mdio_reset mdio_reset;
	unsigned int mdio_reset_addr;
	unsigned int mdio_reset_gpio;

	/* Re-driver support */
	unsigned int redrv;
	unsigned int redrv_if;
	unsigned int redrv_addr;
	unsigned int redrv_lane;
	unsigned int redrv_model;
};

/* I2C, MDIO and GPIO lines are muxed, so only one device at a time */
static DEFINE_MUTEX(xgbe_phy_comm_lock);

static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata);

static int xgbe_phy_i2c_xfer(struct xgbe_prv_data *pdata,
			     struct xgbe_i2c_op *i2c_op)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	/* Be sure we own the bus */
	if (WARN_ON(!phy_data->comm_owned))
		return -EIO;

	return pdata->i2c_if.i2c_xfer(pdata, i2c_op);
}

static int xgbe_phy_redrv_write(struct xgbe_prv_data *pdata, unsigned int reg,
				unsigned int val)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct xgbe_i2c_op i2c_op;
	__be16 *redrv_val;
	u8 redrv_data[5], csum;
	unsigned int i, retry;
	int ret;

	/* High byte of register contains read/write indicator */
	redrv_data[0] = ((reg >> 8) & 0xff) << 1;
	redrv_data[1] = reg & 0xff;
	redrv_val = (__be16 *)&redrv_data[2];
	*redrv_val = cpu_to_be16(val);

	/* Calculate 1 byte checksum */
	csum = 0;
	for (i = 0; i < 4; i++) {
		csum += redrv_data[i];
		if (redrv_data[i] > csum)
			csum++;
	}
	redrv_data[4] = ~csum;

	retry = 1;
again1:
	i2c_op.cmd = XGBE_I2C_CMD_WRITE;
	i2c_op.target = phy_data->redrv_addr;
	i2c_op.len = sizeof(redrv_data);
	i2c_op.buf = redrv_data;
	ret = xgbe_phy_i2c_xfer(pdata, &i2c_op);
	if (ret) {
		if ((ret == -EAGAIN) && retry--)
			goto again1;

		return ret;
	}

	retry = 1;
again2:
	i2c_op.cmd = XGBE_I2C_CMD_READ;
	i2c_op.target = phy_data->redrv_addr;
	i2c_op.len = 1;
	i2c_op.buf = redrv_data;
	ret = xgbe_phy_i2c_xfer(pdata, &i2c_op);
	if (ret) {
		if ((ret == -EAGAIN) && retry--)
			goto again2;

		return ret;
	}

	if (redrv_data[0] != 0xff) {
		netif_dbg(pdata, drv, pdata->netdev,
			  "Redriver write checksum error\n");
		ret = -EIO;
	}

	return ret;
}

static int xgbe_phy_i2c_write(struct xgbe_prv_data *pdata, unsigned int target,
			      void *val, unsigned int val_len)
{
	struct xgbe_i2c_op i2c_op;
	int retry, ret;

	retry = 1;
again:
	/* Write the specfied register */
	i2c_op.cmd = XGBE_I2C_CMD_WRITE;
	i2c_op.target = target;
	i2c_op.len = val_len;
	i2c_op.buf = val;
	ret = xgbe_phy_i2c_xfer(pdata, &i2c_op);
	if ((ret == -EAGAIN) && retry--)
		goto again;

	return ret;
}

static int xgbe_phy_i2c_read(struct xgbe_prv_data *pdata, unsigned int target,
			     void *reg, unsigned int reg_len,
			     void *val, unsigned int val_len)
{
	struct xgbe_i2c_op i2c_op;
	int retry, ret;

	retry = 1;
again1:
	/* Set the specified register to read */
	i2c_op.cmd = XGBE_I2C_CMD_WRITE;
	i2c_op.target = target;
	i2c_op.len = reg_len;
	i2c_op.buf = reg;
	ret = xgbe_phy_i2c_xfer(pdata, &i2c_op);
	if (ret) {
		if ((ret == -EAGAIN) && retry--)
			goto again1;

		return ret;
	}

	retry = 1;
again2:
	/* Read the specfied register */
	i2c_op.cmd = XGBE_I2C_CMD_READ;
	i2c_op.target = target;
	i2c_op.len = val_len;
	i2c_op.buf = val;
	ret = xgbe_phy_i2c_xfer(pdata, &i2c_op);
	if ((ret == -EAGAIN) && retry--)
		goto again2;

	return ret;
}

static int xgbe_phy_sfp_put_mux(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct xgbe_i2c_op i2c_op;
	u8 mux_channel;

	if (phy_data->sfp_comm == XGBE_SFP_COMM_DIRECT)
		return 0;

	/* Select no mux channels */
	mux_channel = 0;
	i2c_op.cmd = XGBE_I2C_CMD_WRITE;
	i2c_op.target = phy_data->sfp_mux_address;
	i2c_op.len = sizeof(mux_channel);
	i2c_op.buf = &mux_channel;

	return xgbe_phy_i2c_xfer(pdata, &i2c_op);
}

static int xgbe_phy_sfp_get_mux(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct xgbe_i2c_op i2c_op;
	u8 mux_channel;

	if (phy_data->sfp_comm == XGBE_SFP_COMM_DIRECT)
		return 0;

	/* Select desired mux channel */
	mux_channel = 1 << phy_data->sfp_mux_channel;
	i2c_op.cmd = XGBE_I2C_CMD_WRITE;
	i2c_op.target = phy_data->sfp_mux_address;
	i2c_op.len = sizeof(mux_channel);
	i2c_op.buf = &mux_channel;

	return xgbe_phy_i2c_xfer(pdata, &i2c_op);
}

static void xgbe_phy_put_comm_ownership(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	phy_data->comm_owned = 0;

	mutex_unlock(&xgbe_phy_comm_lock);
}

static int xgbe_phy_get_comm_ownership(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned long timeout;
	unsigned int mutex_id;

	if (phy_data->comm_owned)
		return 0;

	/* The I2C and MDIO/GPIO bus is multiplexed between multiple devices,
	 * the driver needs to take the software mutex and then the hardware
	 * mutexes before being able to use the busses.
	 */
	mutex_lock(&xgbe_phy_comm_lock);

	/* Clear the mutexes */
	XP_IOWRITE(pdata, XP_I2C_MUTEX, XGBE_MUTEX_RELEASE);
	XP_IOWRITE(pdata, XP_MDIO_MUTEX, XGBE_MUTEX_RELEASE);

	/* Mutex formats are the same for I2C and MDIO/GPIO */
	mutex_id = 0;
	XP_SET_BITS(mutex_id, XP_I2C_MUTEX, ID, phy_data->port_id);
	XP_SET_BITS(mutex_id, XP_I2C_MUTEX, ACTIVE, 1);

	timeout = jiffies + (5 * HZ);
	while (time_before(jiffies, timeout)) {
		/* Must be all zeroes in order to obtain the mutex */
		if (XP_IOREAD(pdata, XP_I2C_MUTEX) ||
		    XP_IOREAD(pdata, XP_MDIO_MUTEX)) {
			usleep_range(100, 200);
			continue;
		}

		/* Obtain the mutex */
		XP_IOWRITE(pdata, XP_I2C_MUTEX, mutex_id);
		XP_IOWRITE(pdata, XP_MDIO_MUTEX, mutex_id);

		phy_data->comm_owned = 1;
		return 0;
	}

	mutex_unlock(&xgbe_phy_comm_lock);

	netdev_err(pdata->netdev, "unable to obtain hardware mutexes\n");

	return -ETIMEDOUT;
}

static int xgbe_phy_mdio_mii_write(struct xgbe_prv_data *pdata, int addr,
				   int reg, u16 val)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	if (reg & MII_ADDR_C45) {
		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL45)
			return -ENOTSUPP;
	} else {
		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL22)
			return -ENOTSUPP;
	}

	return pdata->hw_if.write_ext_mii_regs(pdata, addr, reg, val);
}

static int xgbe_phy_i2c_mii_write(struct xgbe_prv_data *pdata, int reg, u16 val)
{
	__be16 *mii_val;
	u8 mii_data[3];
	int ret;

	ret = xgbe_phy_sfp_get_mux(pdata);
	if (ret)
		return ret;

	mii_data[0] = reg & 0xff;
	mii_val = (__be16 *)&mii_data[1];
	*mii_val = cpu_to_be16(val);

	ret = xgbe_phy_i2c_write(pdata, XGBE_SFP_PHY_ADDRESS,
				 mii_data, sizeof(mii_data));

	xgbe_phy_sfp_put_mux(pdata);

	return ret;
}

static int xgbe_phy_mii_write(struct mii_bus *mii, int addr, int reg, u16 val)
{
	struct xgbe_prv_data *pdata = mii->priv;
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	ret = xgbe_phy_get_comm_ownership(pdata);
	if (ret)
		return ret;

	if (phy_data->conn_type == XGBE_CONN_TYPE_SFP)
		ret = xgbe_phy_i2c_mii_write(pdata, reg, val);
	else if (phy_data->conn_type & XGBE_CONN_TYPE_MDIO)
		ret = xgbe_phy_mdio_mii_write(pdata, addr, reg, val);
	else
		ret = -ENOTSUPP;

	xgbe_phy_put_comm_ownership(pdata);

	return ret;
}

static int xgbe_phy_mdio_mii_read(struct xgbe_prv_data *pdata, int addr,
				  int reg)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	if (reg & MII_ADDR_C45) {
		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL45)
			return -ENOTSUPP;
	} else {
		if (phy_data->phydev_mode != XGBE_MDIO_MODE_CL22)
			return -ENOTSUPP;
	}

	return pdata->hw_if.read_ext_mii_regs(pdata, addr, reg);
}

static int xgbe_phy_i2c_mii_read(struct xgbe_prv_data *pdata, int reg)
{
	__be16 mii_val;
	u8 mii_reg;
	int ret;

	ret = xgbe_phy_sfp_get_mux(pdata);
	if (ret)
		return ret;

	mii_reg = reg;
	ret = xgbe_phy_i2c_read(pdata, XGBE_SFP_PHY_ADDRESS,
				&mii_reg, sizeof(mii_reg),
				&mii_val, sizeof(mii_val));
	if (!ret)
		ret = be16_to_cpu(mii_val);

	xgbe_phy_sfp_put_mux(pdata);

	return ret;
}

static int xgbe_phy_mii_read(struct mii_bus *mii, int addr, int reg)
{
	struct xgbe_prv_data *pdata = mii->priv;
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	ret = xgbe_phy_get_comm_ownership(pdata);
	if (ret)
		return ret;

	if (phy_data->conn_type == XGBE_CONN_TYPE_SFP)
		ret = xgbe_phy_i2c_mii_read(pdata, reg);
	else if (phy_data->conn_type & XGBE_CONN_TYPE_MDIO)
		ret = xgbe_phy_mdio_mii_read(pdata, addr, reg);
	else
		ret = -ENOTSUPP;

	xgbe_phy_put_comm_ownership(pdata);

	return ret;
}

static void xgbe_phy_sfp_phy_settings(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	if (phy_data->sfp_mod_absent) {
		pdata->phy.speed = SPEED_UNKNOWN;
		pdata->phy.duplex = DUPLEX_UNKNOWN;
		pdata->phy.autoneg = AUTONEG_ENABLE;
		pdata->phy.advertising = pdata->phy.supported;
	}

	pdata->phy.advertising &= ~ADVERTISED_Autoneg;
	pdata->phy.advertising &= ~ADVERTISED_TP;
	pdata->phy.advertising &= ~ADVERTISED_FIBRE;
	pdata->phy.advertising &= ~ADVERTISED_100baseT_Full;
	pdata->phy.advertising &= ~ADVERTISED_1000baseT_Full;
	pdata->phy.advertising &= ~ADVERTISED_10000baseT_Full;
	pdata->phy.advertising &= ~ADVERTISED_10000baseR_FEC;

	switch (phy_data->sfp_base) {
	case XGBE_SFP_BASE_1000_T:
	case XGBE_SFP_BASE_1000_SX:
	case XGBE_SFP_BASE_1000_LX:
	case XGBE_SFP_BASE_1000_CX:
		pdata->phy.speed = SPEED_UNKNOWN;
		pdata->phy.duplex = DUPLEX_UNKNOWN;
		pdata->phy.autoneg = AUTONEG_ENABLE;
		pdata->phy.advertising |= ADVERTISED_Autoneg;
		break;
	case XGBE_SFP_BASE_10000_SR:
	case XGBE_SFP_BASE_10000_LR:
	case XGBE_SFP_BASE_10000_LRM:
	case XGBE_SFP_BASE_10000_ER:
	case XGBE_SFP_BASE_10000_CR:
	default:
		pdata->phy.speed = SPEED_10000;
		pdata->phy.duplex = DUPLEX_FULL;
		pdata->phy.autoneg = AUTONEG_DISABLE;
		break;
	}

	switch (phy_data->sfp_base) {
	case XGBE_SFP_BASE_1000_T:
	case XGBE_SFP_BASE_1000_CX:
	case XGBE_SFP_BASE_10000_CR:
		pdata->phy.advertising |= ADVERTISED_TP;
		break;
	default:
		pdata->phy.advertising |= ADVERTISED_FIBRE;
	}

	switch (phy_data->sfp_speed) {
	case XGBE_SFP_SPEED_100_1000:
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100)
			pdata->phy.advertising |= ADVERTISED_100baseT_Full;
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000)
			pdata->phy.advertising |= ADVERTISED_1000baseT_Full;
		break;
	case XGBE_SFP_SPEED_1000:
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000)
			pdata->phy.advertising |= ADVERTISED_1000baseT_Full;
		break;
	case XGBE_SFP_SPEED_10000:
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000)
			pdata->phy.advertising |= ADVERTISED_10000baseT_Full;
		break;
	default:
		/* Choose the fastest supported speed */
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000)
			pdata->phy.advertising |= ADVERTISED_10000baseT_Full;
		else if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000)
			pdata->phy.advertising |= ADVERTISED_1000baseT_Full;
		else if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100)
			pdata->phy.advertising |= ADVERTISED_100baseT_Full;
	}
}

static bool xgbe_phy_sfp_bit_rate(struct xgbe_sfp_eeprom *sfp_eeprom,
				  enum xgbe_sfp_speed sfp_speed)
{
	u8 *sfp_base, min, max;

	sfp_base = sfp_eeprom->base;

	switch (sfp_speed) {
	case XGBE_SFP_SPEED_1000:
		min = XGBE_SFP_BASE_BR_1GBE_MIN;
		max = XGBE_SFP_BASE_BR_1GBE_MAX;
		break;
	case XGBE_SFP_SPEED_10000:
		min = XGBE_SFP_BASE_BR_10GBE_MIN;
		max = XGBE_SFP_BASE_BR_10GBE_MAX;
		break;
	default:
		return false;
	}

	return ((sfp_base[XGBE_SFP_BASE_BR] >= min) &&
		(sfp_base[XGBE_SFP_BASE_BR] <= max));
}

static void xgbe_phy_free_phy_device(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	if (phy_data->phydev) {
		phy_detach(phy_data->phydev);
		phy_device_remove(phy_data->phydev);
		phy_device_free(phy_data->phydev);
		phy_data->phydev = NULL;
	}
}

static bool xgbe_phy_finisar_phy_quirks(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int phy_id = phy_data->phydev->phy_id;

	if ((phy_id & 0xfffffff0) != 0x01ff0cc0)
		return false;

	/* Enable Base-T AN */
	phy_write(phy_data->phydev, 0x16, 0x0001);
	phy_write(phy_data->phydev, 0x00, 0x9140);
	phy_write(phy_data->phydev, 0x16, 0x0000);

	/* Enable SGMII at 100Base-T/1000Base-T Full Duplex */
	phy_write(phy_data->phydev, 0x1b, 0x9084);
	phy_write(phy_data->phydev, 0x09, 0x0e00);
	phy_write(phy_data->phydev, 0x00, 0x8140);
	phy_write(phy_data->phydev, 0x04, 0x0d01);
	phy_write(phy_data->phydev, 0x00, 0x9140);

	phy_data->phydev->supported = PHY_GBIT_FEATURES;
	phy_data->phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
	phy_data->phydev->advertising = phy_data->phydev->supported;

	netif_dbg(pdata, drv, pdata->netdev,
		  "Finisar PHY quirk in place\n");

	return true;
}

static void xgbe_phy_external_phy_quirks(struct xgbe_prv_data *pdata)
{
	if (xgbe_phy_finisar_phy_quirks(pdata))
		return;
}

static int xgbe_phy_find_phy_device(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct phy_device *phydev;
	int ret;

	/* If we already have a PHY, just return */
	if (phy_data->phydev)
		return 0;

	/* Check for the use of an external PHY */
	if (phy_data->phydev_mode == XGBE_MDIO_MODE_NONE)
		return 0;

	/* For SFP, only use an external PHY if available */
	if ((phy_data->port_mode == XGBE_PORT_MODE_SFP) &&
	    !phy_data->sfp_phy_avail)
		return 0;

	/* Create and connect to the PHY device */
	phydev = get_phy_device(phy_data->mii, phy_data->mdio_addr,
				(phy_data->phydev_mode == XGBE_MDIO_MODE_CL45));
	if (IS_ERR(phydev)) {
		netdev_err(pdata->netdev, "get_phy_device failed\n");
		return -ENODEV;
	}
	netif_dbg(pdata, drv, pdata->netdev, "external PHY id is %#010x\n",
		  phydev->phy_id);

	/*TODO: If c45, add request_module based on one of the MMD ids? */

	ret = phy_device_register(phydev);
	if (ret) {
		netdev_err(pdata->netdev, "phy_device_register failed\n");
		phy_device_free(phydev);
		return ret;
	}

	ret = phy_attach_direct(pdata->netdev, phydev, phydev->dev_flags,
				PHY_INTERFACE_MODE_SGMII);
	if (ret) {
		netdev_err(pdata->netdev, "phy_attach_direct failed\n");
		phy_device_remove(phydev);
		phy_device_free(phydev);
		return ret;
	}
	phy_data->phydev = phydev;

	xgbe_phy_external_phy_quirks(pdata);
	phydev->advertising &= pdata->phy.advertising;

	phy_start_aneg(phy_data->phydev);

	return 0;
}

static void xgbe_phy_sfp_external_phy(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	if (!phy_data->sfp_changed)
		return;

	phy_data->sfp_phy_avail = 0;

	if (phy_data->sfp_base != XGBE_SFP_BASE_1000_T)
		return;

	/* Check access to the PHY by reading CTRL1 */
	ret = xgbe_phy_i2c_mii_read(pdata, MII_BMCR);
	if (ret < 0)
		return;

	/* Successfully accessed the PHY */
	phy_data->sfp_phy_avail = 1;
}

static bool xgbe_phy_belfuse_parse_quirks(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct xgbe_sfp_eeprom *sfp_eeprom = &phy_data->sfp_eeprom;

	if (memcmp(&sfp_eeprom->base[XGBE_SFP_BASE_VENDOR_NAME],
		   XGBE_BEL_FUSE_VENDOR, XGBE_SFP_BASE_VENDOR_NAME_LEN))
		return false;

	if (!memcmp(&sfp_eeprom->base[XGBE_SFP_BASE_VENDOR_PN],
		    XGBE_BEL_FUSE_PARTNO, XGBE_SFP_BASE_VENDOR_PN_LEN)) {
		phy_data->sfp_base = XGBE_SFP_BASE_1000_SX;
		phy_data->sfp_cable = XGBE_SFP_CABLE_ACTIVE;
		phy_data->sfp_speed = XGBE_SFP_SPEED_1000;
		if (phy_data->sfp_changed)
			netif_dbg(pdata, drv, pdata->netdev,
				  "Bel-Fuse SFP quirk in place\n");
		return true;
	}

	return false;
}

static bool xgbe_phy_sfp_parse_quirks(struct xgbe_prv_data *pdata)
{
	if (xgbe_phy_belfuse_parse_quirks(pdata))
		return true;

	return false;
}

static void xgbe_phy_sfp_parse_eeprom(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct xgbe_sfp_eeprom *sfp_eeprom = &phy_data->sfp_eeprom;
	u8 *sfp_base;

	sfp_base = sfp_eeprom->base;

	if (sfp_base[XGBE_SFP_BASE_ID] != XGBE_SFP_ID_SFP)
		return;

	if (sfp_base[XGBE_SFP_BASE_EXT_ID] != XGBE_SFP_EXT_ID_SFP)
		return;

	if (xgbe_phy_sfp_parse_quirks(pdata))
		return;

	/* Assume ACTIVE cable unless told it is PASSIVE */
	if (sfp_base[XGBE_SFP_BASE_CABLE] & XGBE_SFP_BASE_CABLE_PASSIVE) {
		phy_data->sfp_cable = XGBE_SFP_CABLE_PASSIVE;
		phy_data->sfp_cable_len = sfp_base[XGBE_SFP_BASE_CU_CABLE_LEN];
	} else {
		phy_data->sfp_cable = XGBE_SFP_CABLE_ACTIVE;
	}

	/* Determine the type of SFP */
	if (sfp_base[XGBE_SFP_BASE_10GBE_CC] & XGBE_SFP_BASE_10GBE_CC_SR)
		phy_data->sfp_base = XGBE_SFP_BASE_10000_SR;
	else if (sfp_base[XGBE_SFP_BASE_10GBE_CC] & XGBE_SFP_BASE_10GBE_CC_LR)
		phy_data->sfp_base = XGBE_SFP_BASE_10000_LR;
	else if (sfp_base[XGBE_SFP_BASE_10GBE_CC] & XGBE_SFP_BASE_10GBE_CC_LRM)
		phy_data->sfp_base = XGBE_SFP_BASE_10000_LRM;
	else if (sfp_base[XGBE_SFP_BASE_10GBE_CC] & XGBE_SFP_BASE_10GBE_CC_ER)
		phy_data->sfp_base = XGBE_SFP_BASE_10000_ER;
	else if (sfp_base[XGBE_SFP_BASE_1GBE_CC] & XGBE_SFP_BASE_1GBE_CC_SX)
		phy_data->sfp_base = XGBE_SFP_BASE_1000_SX;
	else if (sfp_base[XGBE_SFP_BASE_1GBE_CC] & XGBE_SFP_BASE_1GBE_CC_LX)
		phy_data->sfp_base = XGBE_SFP_BASE_1000_LX;
	else if (sfp_base[XGBE_SFP_BASE_1GBE_CC] & XGBE_SFP_BASE_1GBE_CC_CX)
		phy_data->sfp_base = XGBE_SFP_BASE_1000_CX;
	else if (sfp_base[XGBE_SFP_BASE_1GBE_CC] & XGBE_SFP_BASE_1GBE_CC_T)
		phy_data->sfp_base = XGBE_SFP_BASE_1000_T;
	else if ((phy_data->sfp_cable == XGBE_SFP_CABLE_PASSIVE) &&
		 xgbe_phy_sfp_bit_rate(sfp_eeprom, XGBE_SFP_SPEED_10000))
		phy_data->sfp_base = XGBE_SFP_BASE_10000_CR;

	switch (phy_data->sfp_base) {
	case XGBE_SFP_BASE_1000_T:
		phy_data->sfp_speed = XGBE_SFP_SPEED_100_1000;
		break;
	case XGBE_SFP_BASE_1000_SX:
	case XGBE_SFP_BASE_1000_LX:
	case XGBE_SFP_BASE_1000_CX:
		phy_data->sfp_speed = XGBE_SFP_SPEED_1000;
		break;
	case XGBE_SFP_BASE_10000_SR:
	case XGBE_SFP_BASE_10000_LR:
	case XGBE_SFP_BASE_10000_LRM:
	case XGBE_SFP_BASE_10000_ER:
	case XGBE_SFP_BASE_10000_CR:
		phy_data->sfp_speed = XGBE_SFP_SPEED_10000;
		break;
	default:
		break;
	}
}

static void xgbe_phy_sfp_eeprom_info(struct xgbe_prv_data *pdata,
				     struct xgbe_sfp_eeprom *sfp_eeprom)
{
	struct xgbe_sfp_ascii sfp_ascii;
	char *sfp_data = (char *)&sfp_ascii;

	netif_dbg(pdata, drv, pdata->netdev, "SFP detected:\n");
	memcpy(sfp_data, &sfp_eeprom->base[XGBE_SFP_BASE_VENDOR_NAME],
	       XGBE_SFP_BASE_VENDOR_NAME_LEN);
	sfp_data[XGBE_SFP_BASE_VENDOR_NAME_LEN] = '\0';
	netif_dbg(pdata, drv, pdata->netdev, "  vendor:         %s\n",
		  sfp_data);

	memcpy(sfp_data, &sfp_eeprom->base[XGBE_SFP_BASE_VENDOR_PN],
	       XGBE_SFP_BASE_VENDOR_PN_LEN);
	sfp_data[XGBE_SFP_BASE_VENDOR_PN_LEN] = '\0';
	netif_dbg(pdata, drv, pdata->netdev, "  part number:    %s\n",
		  sfp_data);

	memcpy(sfp_data, &sfp_eeprom->base[XGBE_SFP_BASE_VENDOR_REV],
	       XGBE_SFP_BASE_VENDOR_REV_LEN);
	sfp_data[XGBE_SFP_BASE_VENDOR_REV_LEN] = '\0';
	netif_dbg(pdata, drv, pdata->netdev, "  revision level: %s\n",
		  sfp_data);

	memcpy(sfp_data, &sfp_eeprom->extd[XGBE_SFP_BASE_VENDOR_SN],
	       XGBE_SFP_BASE_VENDOR_SN_LEN);
	sfp_data[XGBE_SFP_BASE_VENDOR_SN_LEN] = '\0';
	netif_dbg(pdata, drv, pdata->netdev, "  serial number:  %s\n",
		  sfp_data);
}

static bool xgbe_phy_sfp_verify_eeprom(u8 cc_in, u8 *buf, unsigned int len)
{
	u8 cc;

	for (cc = 0; len; buf++, len--)
		cc += *buf;

	return (cc == cc_in) ? true : false;
}

static int xgbe_phy_sfp_read_eeprom(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	struct xgbe_sfp_eeprom sfp_eeprom;
	u8 eeprom_addr;
	int ret;

	ret = xgbe_phy_sfp_get_mux(pdata);
	if (ret) {
		netdev_err(pdata->netdev, "I2C error setting SFP MUX\n");
		return ret;
	}

	/* Read the SFP serial ID eeprom */
	eeprom_addr = 0;
	ret = xgbe_phy_i2c_read(pdata, XGBE_SFP_SERIAL_ID_ADDRESS,
				&eeprom_addr, sizeof(eeprom_addr),
				&sfp_eeprom, sizeof(sfp_eeprom));
	if (ret) {
		netdev_err(pdata->netdev, "I2C error reading SFP EEPROM\n");
		goto put;
	}

	/* Validate the contents read */
	if (!xgbe_phy_sfp_verify_eeprom(sfp_eeprom.base[XGBE_SFP_BASE_CC],
					sfp_eeprom.base,
					sizeof(sfp_eeprom.base) - 1)) {
		ret = -EINVAL;
		goto put;
	}

	if (!xgbe_phy_sfp_verify_eeprom(sfp_eeprom.extd[XGBE_SFP_EXTD_CC],
					sfp_eeprom.extd,
					sizeof(sfp_eeprom.extd) - 1)) {
		ret = -EINVAL;
		goto put;
	}

	/* Check for an added or changed SFP */
	if (memcmp(&phy_data->sfp_eeprom, &sfp_eeprom, sizeof(sfp_eeprom))) {
		phy_data->sfp_changed = 1;

		if (netif_msg_drv(pdata))
			xgbe_phy_sfp_eeprom_info(pdata, &sfp_eeprom);

		memcpy(&phy_data->sfp_eeprom, &sfp_eeprom, sizeof(sfp_eeprom));

		if (sfp_eeprom.extd[XGBE_SFP_EXTD_SFF_8472]) {
			u8 diag_type = sfp_eeprom.extd[XGBE_SFP_EXTD_DIAG];

			if (!(diag_type & XGBE_SFP_EXTD_DIAG_ADDR_CHANGE))
				phy_data->sfp_diags = 1;
		}

		xgbe_phy_free_phy_device(pdata);
	} else {
		phy_data->sfp_changed = 0;
	}

put:
	xgbe_phy_sfp_put_mux(pdata);

	return ret;
}

static void xgbe_phy_sfp_signals(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int gpio_input;
	u8 gpio_reg, gpio_ports[2];
	int ret;

	/* Read the input port registers */
	gpio_reg = 0;
	ret = xgbe_phy_i2c_read(pdata, phy_data->sfp_gpio_address,
				&gpio_reg, sizeof(gpio_reg),
				gpio_ports, sizeof(gpio_ports));
	if (ret) {
		netdev_err(pdata->netdev, "I2C error reading SFP GPIOs\n");
		return;
	}

	gpio_input = (gpio_ports[1] << 8) | gpio_ports[0];

	if (phy_data->sfp_gpio_mask & XGBE_GPIO_NO_MOD_ABSENT) {
		/* No GPIO, just assume the module is present for now */
		phy_data->sfp_mod_absent = 0;
	} else {
		if (!(gpio_input & (1 << phy_data->sfp_gpio_mod_absent)))
			phy_data->sfp_mod_absent = 0;
	}

	if (!(phy_data->sfp_gpio_mask & XGBE_GPIO_NO_RX_LOS) &&
	    (gpio_input & (1 << phy_data->sfp_gpio_rx_los)))
		phy_data->sfp_rx_los = 1;

	if (!(phy_data->sfp_gpio_mask & XGBE_GPIO_NO_TX_FAULT) &&
	    (gpio_input & (1 << phy_data->sfp_gpio_tx_fault)))
		phy_data->sfp_tx_fault = 1;
}

static void xgbe_phy_sfp_mod_absent(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	xgbe_phy_free_phy_device(pdata);

	phy_data->sfp_mod_absent = 1;
	phy_data->sfp_phy_avail = 0;
	memset(&phy_data->sfp_eeprom, 0, sizeof(phy_data->sfp_eeprom));
}

static void xgbe_phy_sfp_reset(struct xgbe_phy_data *phy_data)
{
	phy_data->sfp_rx_los = 0;
	phy_data->sfp_tx_fault = 0;
	phy_data->sfp_mod_absent = 1;
	phy_data->sfp_diags = 0;
	phy_data->sfp_base = XGBE_SFP_BASE_UNKNOWN;
	phy_data->sfp_cable = XGBE_SFP_CABLE_UNKNOWN;
	phy_data->sfp_speed = XGBE_SFP_SPEED_UNKNOWN;
}

static void xgbe_phy_sfp_detect(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	/* Reset the SFP signals and info */
	xgbe_phy_sfp_reset(phy_data);

	ret = xgbe_phy_get_comm_ownership(pdata);
	if (ret)
		return;

	/* Read the SFP signals and check for module presence */
	xgbe_phy_sfp_signals(pdata);
	if (phy_data->sfp_mod_absent) {
		xgbe_phy_sfp_mod_absent(pdata);
		goto put;
	}

	ret = xgbe_phy_sfp_read_eeprom(pdata);
	if (ret) {
		/* Treat any error as if there isn't an SFP plugged in */
		xgbe_phy_sfp_reset(phy_data);
		xgbe_phy_sfp_mod_absent(pdata);
		goto put;
	}

	xgbe_phy_sfp_parse_eeprom(pdata);

	xgbe_phy_sfp_external_phy(pdata);

put:
	xgbe_phy_sfp_phy_settings(pdata);

	xgbe_phy_put_comm_ownership(pdata);
}

static void xgbe_phy_phydev_flowctrl(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	u16 lcl_adv = 0, rmt_adv = 0;
	u8 fc;

	pdata->phy.tx_pause = 0;
	pdata->phy.rx_pause = 0;

	if (!phy_data->phydev)
		return;

	if (phy_data->phydev->advertising & ADVERTISED_Pause)
		lcl_adv |= ADVERTISE_PAUSE_CAP;
	if (phy_data->phydev->advertising & ADVERTISED_Asym_Pause)
		lcl_adv |= ADVERTISE_PAUSE_ASYM;

	if (phy_data->phydev->pause) {
		pdata->phy.lp_advertising |= ADVERTISED_Pause;
		rmt_adv |= LPA_PAUSE_CAP;
	}
	if (phy_data->phydev->asym_pause) {
		pdata->phy.lp_advertising |= ADVERTISED_Asym_Pause;
		rmt_adv |= LPA_PAUSE_ASYM;
	}

	fc = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
	if (fc & FLOW_CTRL_TX)
		pdata->phy.tx_pause = 1;
	if (fc & FLOW_CTRL_RX)
		pdata->phy.rx_pause = 1;
}

static enum xgbe_mode xgbe_phy_an37_sgmii_outcome(struct xgbe_prv_data *pdata)
{
	enum xgbe_mode mode;

	pdata->phy.lp_advertising |= ADVERTISED_Autoneg;
	pdata->phy.lp_advertising |= ADVERTISED_TP;

	/* Use external PHY to determine flow control */
	if (pdata->phy.pause_autoneg)
		xgbe_phy_phydev_flowctrl(pdata);

	switch (pdata->an_status & XGBE_SGMII_AN_LINK_SPEED) {
	case XGBE_SGMII_AN_LINK_SPEED_100:
		if (pdata->an_status & XGBE_SGMII_AN_LINK_DUPLEX) {
			pdata->phy.lp_advertising |= ADVERTISED_100baseT_Full;
			mode = XGBE_MODE_SGMII_100;
		} else {
			/* Half-duplex not supported */
			pdata->phy.lp_advertising |= ADVERTISED_100baseT_Half;
			mode = XGBE_MODE_UNKNOWN;
		}
		break;
	case XGBE_SGMII_AN_LINK_SPEED_1000:
		if (pdata->an_status & XGBE_SGMII_AN_LINK_DUPLEX) {
			pdata->phy.lp_advertising |= ADVERTISED_1000baseT_Full;
			mode = XGBE_MODE_SGMII_1000;
		} else {
			/* Half-duplex not supported */
			pdata->phy.lp_advertising |= ADVERTISED_1000baseT_Half;
			mode = XGBE_MODE_UNKNOWN;
		}
		break;
	default:
		mode = XGBE_MODE_UNKNOWN;
	}

	return mode;
}

static enum xgbe_mode xgbe_phy_an37_outcome(struct xgbe_prv_data *pdata)
{
	enum xgbe_mode mode;
	unsigned int ad_reg, lp_reg;

	pdata->phy.lp_advertising |= ADVERTISED_Autoneg;
	pdata->phy.lp_advertising |= ADVERTISED_FIBRE;

	/* Compare Advertisement and Link Partner register */
	ad_reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_ADVERTISE);
	lp_reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_LP_ABILITY);
	if (lp_reg & 0x100)
		pdata->phy.lp_advertising |= ADVERTISED_Pause;
	if (lp_reg & 0x80)
		pdata->phy.lp_advertising |= ADVERTISED_Asym_Pause;

	if (pdata->phy.pause_autoneg) {
		/* Set flow control based on auto-negotiation result */
		pdata->phy.tx_pause = 0;
		pdata->phy.rx_pause = 0;

		if (ad_reg & lp_reg & 0x100) {
			pdata->phy.tx_pause = 1;
			pdata->phy.rx_pause = 1;
		} else if (ad_reg & lp_reg & 0x80) {
			if (ad_reg & 0x100)
				pdata->phy.rx_pause = 1;
			else if (lp_reg & 0x100)
				pdata->phy.tx_pause = 1;
		}
	}

	if (lp_reg & 0x40)
		pdata->phy.lp_advertising |= ADVERTISED_1000baseT_Half;
	if (lp_reg & 0x20)
		pdata->phy.lp_advertising |= ADVERTISED_1000baseT_Full;

	/* Half duplex is not supported */
	ad_reg &= lp_reg;
	mode = (ad_reg & 0x20) ? XGBE_MODE_X : XGBE_MODE_UNKNOWN;

	return mode;
}

static enum xgbe_mode xgbe_phy_an73_redrv_outcome(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	enum xgbe_mode mode;
	unsigned int ad_reg, lp_reg;

	pdata->phy.lp_advertising |= ADVERTISED_Autoneg;
	pdata->phy.lp_advertising |= ADVERTISED_Backplane;

	/* Use external PHY to determine flow control */
	if (pdata->phy.pause_autoneg)
		xgbe_phy_phydev_flowctrl(pdata);

	/* Compare Advertisement and Link Partner register 2 */
	ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
	lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1);
	if (lp_reg & 0x80)
		pdata->phy.lp_advertising |= ADVERTISED_10000baseKR_Full;
	if (lp_reg & 0x20)
		pdata->phy.lp_advertising |= ADVERTISED_1000baseKX_Full;

	ad_reg &= lp_reg;
	if (ad_reg & 0x80) {
		switch (phy_data->port_mode) {
		case XGBE_PORT_MODE_BACKPLANE:
			mode = XGBE_MODE_KR;
			break;
		default:
			mode = XGBE_MODE_SFI;
			break;
		}
	} else if (ad_reg & 0x20) {
		switch (phy_data->port_mode) {
		case XGBE_PORT_MODE_BACKPLANE:
			mode = XGBE_MODE_KX_1000;
			break;
		case XGBE_PORT_MODE_1000BASE_X:
			mode = XGBE_MODE_X;
			break;
		case XGBE_PORT_MODE_SFP:
			switch (phy_data->sfp_base) {
			case XGBE_SFP_BASE_1000_T:
				if (phy_data->phydev &&
				    (phy_data->phydev->speed == SPEED_100))
					mode = XGBE_MODE_SGMII_100;
				else
					mode = XGBE_MODE_SGMII_1000;
				break;
			case XGBE_SFP_BASE_1000_SX:
			case XGBE_SFP_BASE_1000_LX:
			case XGBE_SFP_BASE_1000_CX:
			default:
				mode = XGBE_MODE_X;
				break;
			}
			break;
		default:
			if (phy_data->phydev &&
			    (phy_data->phydev->speed == SPEED_100))
				mode = XGBE_MODE_SGMII_100;
			else
				mode = XGBE_MODE_SGMII_1000;
			break;
		}
	} else {
		mode = XGBE_MODE_UNKNOWN;
	}

	/* Compare Advertisement and Link Partner register 3 */
	ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
	lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2);
	if (lp_reg & 0xc000)
		pdata->phy.lp_advertising |= ADVERTISED_10000baseR_FEC;

	return mode;
}

static enum xgbe_mode xgbe_phy_an73_outcome(struct xgbe_prv_data *pdata)
{
	enum xgbe_mode mode;
	unsigned int ad_reg, lp_reg;

	pdata->phy.lp_advertising |= ADVERTISED_Autoneg;
	pdata->phy.lp_advertising |= ADVERTISED_Backplane;

	/* Compare Advertisement and Link Partner register 1 */
	ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
	lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA);
	if (lp_reg & 0x400)
		pdata->phy.lp_advertising |= ADVERTISED_Pause;
	if (lp_reg & 0x800)
		pdata->phy.lp_advertising |= ADVERTISED_Asym_Pause;

	if (pdata->phy.pause_autoneg) {
		/* Set flow control based on auto-negotiation result */
		pdata->phy.tx_pause = 0;
		pdata->phy.rx_pause = 0;

		if (ad_reg & lp_reg & 0x400) {
			pdata->phy.tx_pause = 1;
			pdata->phy.rx_pause = 1;
		} else if (ad_reg & lp_reg & 0x800) {
			if (ad_reg & 0x400)
				pdata->phy.rx_pause = 1;
			else if (lp_reg & 0x400)
				pdata->phy.tx_pause = 1;
		}
	}

	/* Compare Advertisement and Link Partner register 2 */
	ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
	lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1);
	if (lp_reg & 0x80)
		pdata->phy.lp_advertising |= ADVERTISED_10000baseKR_Full;
	if (lp_reg & 0x20)
		pdata->phy.lp_advertising |= ADVERTISED_1000baseKX_Full;

	ad_reg &= lp_reg;
	if (ad_reg & 0x80)
		mode = XGBE_MODE_KR;
	else if (ad_reg & 0x20)
		mode = XGBE_MODE_KX_1000;
	else
		mode = XGBE_MODE_UNKNOWN;

	/* Compare Advertisement and Link Partner register 3 */
	ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
	lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2);
	if (lp_reg & 0xc000)
		pdata->phy.lp_advertising |= ADVERTISED_10000baseR_FEC;

	return mode;
}

static enum xgbe_mode xgbe_phy_an_outcome(struct xgbe_prv_data *pdata)
{
	switch (pdata->an_mode) {
	case XGBE_AN_MODE_CL73:
		return xgbe_phy_an73_outcome(pdata);
	case XGBE_AN_MODE_CL73_REDRV:
		return xgbe_phy_an73_redrv_outcome(pdata);
	case XGBE_AN_MODE_CL37:
		return xgbe_phy_an37_outcome(pdata);
	case XGBE_AN_MODE_CL37_SGMII:
		return xgbe_phy_an37_sgmii_outcome(pdata);
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static unsigned int xgbe_phy_an_advertising(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int advertising;

	/* Without a re-driver, just return current advertising */
	if (!phy_data->redrv)
		return pdata->phy.advertising;

	/* With the KR re-driver we need to advertise a single speed */
	advertising = pdata->phy.advertising;
	advertising &= ~ADVERTISED_1000baseKX_Full;
	advertising &= ~ADVERTISED_10000baseKR_Full;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		advertising |= ADVERTISED_10000baseKR_Full;
		break;
	case XGBE_PORT_MODE_BACKPLANE_2500:
		advertising |= ADVERTISED_1000baseKX_Full;
		break;
	case XGBE_PORT_MODE_1000BASE_T:
	case XGBE_PORT_MODE_1000BASE_X:
	case XGBE_PORT_MODE_NBASE_T:
		advertising |= ADVERTISED_1000baseKX_Full;
		break;
	case XGBE_PORT_MODE_10GBASE_T:
		if (phy_data->phydev &&
		    (phy_data->phydev->speed == SPEED_10000))
			advertising |= ADVERTISED_10000baseKR_Full;
		else
			advertising |= ADVERTISED_1000baseKX_Full;
		break;
	case XGBE_PORT_MODE_10GBASE_R:
		advertising |= ADVERTISED_10000baseKR_Full;
		break;
	case XGBE_PORT_MODE_SFP:
		switch (phy_data->sfp_base) {
		case XGBE_SFP_BASE_1000_T:
		case XGBE_SFP_BASE_1000_SX:
		case XGBE_SFP_BASE_1000_LX:
		case XGBE_SFP_BASE_1000_CX:
			advertising |= ADVERTISED_1000baseKX_Full;
			break;
		default:
			advertising |= ADVERTISED_10000baseKR_Full;
			break;
		}
		break;
	default:
		advertising |= ADVERTISED_10000baseKR_Full;
		break;
	}

	return advertising;
}

static int xgbe_phy_an_config(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	ret = xgbe_phy_find_phy_device(pdata);
	if (ret)
		return ret;

	if (!phy_data->phydev)
		return 0;

	phy_data->phydev->autoneg = pdata->phy.autoneg;
	phy_data->phydev->advertising = phy_data->phydev->supported &
					pdata->phy.advertising;

	if (pdata->phy.autoneg != AUTONEG_ENABLE) {
		phy_data->phydev->speed = pdata->phy.speed;
		phy_data->phydev->duplex = pdata->phy.duplex;
	}

	ret = phy_start_aneg(phy_data->phydev);

	return ret;
}

static enum xgbe_an_mode xgbe_phy_an_sfp_mode(struct xgbe_phy_data *phy_data)
{
	switch (phy_data->sfp_base) {
	case XGBE_SFP_BASE_1000_T:
		return XGBE_AN_MODE_CL37_SGMII;
	case XGBE_SFP_BASE_1000_SX:
	case XGBE_SFP_BASE_1000_LX:
	case XGBE_SFP_BASE_1000_CX:
		return XGBE_AN_MODE_CL37;
	default:
		return XGBE_AN_MODE_NONE;
	}
}

static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	/* A KR re-driver will always require CL73 AN */
	if (phy_data->redrv)
		return XGBE_AN_MODE_CL73_REDRV;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		return XGBE_AN_MODE_CL73;
	case XGBE_PORT_MODE_BACKPLANE_2500:
		return XGBE_AN_MODE_NONE;
	case XGBE_PORT_MODE_1000BASE_T:
		return XGBE_AN_MODE_CL37_SGMII;
	case XGBE_PORT_MODE_1000BASE_X:
		return XGBE_AN_MODE_CL37;
	case XGBE_PORT_MODE_NBASE_T:
		return XGBE_AN_MODE_CL37_SGMII;
	case XGBE_PORT_MODE_10GBASE_T:
		return XGBE_AN_MODE_CL73;
	case XGBE_PORT_MODE_10GBASE_R:
		return XGBE_AN_MODE_NONE;
	case XGBE_PORT_MODE_SFP:
		return xgbe_phy_an_sfp_mode(phy_data);
	default:
		return XGBE_AN_MODE_NONE;
	}
}

static int xgbe_phy_set_redrv_mode_mdio(struct xgbe_prv_data *pdata,
					enum xgbe_phy_redrv_mode mode)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	u16 redrv_reg, redrv_val;

	redrv_reg = XGBE_PHY_REDRV_MODE_REG + (phy_data->redrv_lane * 0x1000);
	redrv_val = (u16)mode;

	return pdata->hw_if.write_ext_mii_regs(pdata, phy_data->redrv_addr,
					       redrv_reg, redrv_val);
}

static int xgbe_phy_set_redrv_mode_i2c(struct xgbe_prv_data *pdata,
				       enum xgbe_phy_redrv_mode mode)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int redrv_reg;
	int ret;

	/* Calculate the register to write */
	redrv_reg = XGBE_PHY_REDRV_MODE_REG + (phy_data->redrv_lane * 0x1000);

	ret = xgbe_phy_redrv_write(pdata, redrv_reg, mode);

	return ret;
}

static void xgbe_phy_set_redrv_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	enum xgbe_phy_redrv_mode mode;
	int ret;

	if (!phy_data->redrv)
		return;

	mode = XGBE_PHY_REDRV_MODE_CX;
	if ((phy_data->port_mode == XGBE_PORT_MODE_SFP) &&
	    (phy_data->sfp_base != XGBE_SFP_BASE_1000_CX) &&
	    (phy_data->sfp_base != XGBE_SFP_BASE_10000_CR))
		mode = XGBE_PHY_REDRV_MODE_SR;

	ret = xgbe_phy_get_comm_ownership(pdata);
	if (ret)
		return;

	if (phy_data->redrv_if)
		xgbe_phy_set_redrv_mode_i2c(pdata, mode);
	else
		xgbe_phy_set_redrv_mode_mdio(pdata, mode);

	xgbe_phy_put_comm_ownership(pdata);
}

static void xgbe_phy_start_ratechange(struct xgbe_prv_data *pdata)
{
	if (!XP_IOREAD_BITS(pdata, XP_DRIVER_INT_RO, STATUS))
		return;

	/* Log if a previous command did not complete */
	netif_dbg(pdata, link, pdata->netdev,
		  "firmware mailbox not ready for command\n");
}

static void xgbe_phy_complete_ratechange(struct xgbe_prv_data *pdata)
{
	unsigned int wait;

	/* Wait for command to complete */
	wait = XGBE_RATECHANGE_COUNT;
	while (wait--) {
		if (!XP_IOREAD_BITS(pdata, XP_DRIVER_INT_RO, STATUS))
			return;

		usleep_range(1000, 2000);
	}

	netif_dbg(pdata, link, pdata->netdev,
		  "firmware mailbox command did not complete\n");
}

static void xgbe_phy_rrc(struct xgbe_prv_data *pdata)
{
	unsigned int s0;

	xgbe_phy_start_ratechange(pdata);

	/* Receiver Reset Cycle */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 5);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 0);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	netif_dbg(pdata, link, pdata->netdev, "receiver reset complete\n");
}

static void xgbe_phy_power_off(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	xgbe_phy_start_ratechange(pdata);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, 0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_UNKNOWN;

	netif_dbg(pdata, link, pdata->netdev, "phy powered off\n");
}

static void xgbe_phy_sfi_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 10G/SFI */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 3);
	if (phy_data->sfp_cable != XGBE_SFP_CABLE_PASSIVE) {
		XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 0);
	} else {
		if (phy_data->sfp_cable_len <= 1)
			XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 1);
		else if (phy_data->sfp_cable_len <= 3)
			XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 2);
		else
			XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 3);
	}

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_SFI;

	netif_dbg(pdata, link, pdata->netdev, "10GbE SFI mode set\n");
}

static void xgbe_phy_x_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 1G/X */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 1);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 3);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_X;

	netif_dbg(pdata, link, pdata->netdev, "1GbE X mode set\n");
}

static void xgbe_phy_sgmii_1000_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 1G/SGMII */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 1);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 2);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_SGMII_1000;

	netif_dbg(pdata, link, pdata->netdev, "1GbE SGMII mode set\n");
}

static void xgbe_phy_sgmii_100_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 1G/SGMII */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 1);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 1);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_SGMII_100;

	netif_dbg(pdata, link, pdata->netdev, "100MbE SGMII mode set\n");
}

static void xgbe_phy_kr_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 10G/KR */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 4);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 0);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_KR;

	netif_dbg(pdata, link, pdata->netdev, "10GbE KR mode set\n");
}

static void xgbe_phy_kx_2500_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 2.5G/KX */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 2);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 0);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_KX_2500;

	netif_dbg(pdata, link, pdata->netdev, "2.5GbE KX mode set\n");
}

static void xgbe_phy_kx_1000_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int s0;

	xgbe_phy_set_redrv_mode(pdata);

	xgbe_phy_start_ratechange(pdata);

	/* 1G/KX */
	s0 = 0;
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, COMMAND, 1);
	XP_SET_BITS(s0, XP_DRIVER_SCRATCH_0, SUB_COMMAND, 3);

	/* Call FW to make the change */
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_0, s0);
	XP_IOWRITE(pdata, XP_DRIVER_SCRATCH_1, 0);
	XP_IOWRITE_BITS(pdata, XP_DRIVER_INT_REQ, REQUEST, 1);

	xgbe_phy_complete_ratechange(pdata);

	phy_data->cur_mode = XGBE_MODE_KX_1000;

	netif_dbg(pdata, link, pdata->netdev, "1GbE KX mode set\n");
}

static enum xgbe_mode xgbe_phy_cur_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	return phy_data->cur_mode;
}

static enum xgbe_mode xgbe_phy_switch_baset_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	/* No switching if not 10GBase-T */
	if (phy_data->port_mode != XGBE_PORT_MODE_10GBASE_T)
		return xgbe_phy_cur_mode(pdata);

	switch (xgbe_phy_cur_mode(pdata)) {
	case XGBE_MODE_SGMII_100:
	case XGBE_MODE_SGMII_1000:
		return XGBE_MODE_KR;
	case XGBE_MODE_KR:
	default:
		return XGBE_MODE_SGMII_1000;
	}
}

static enum xgbe_mode xgbe_phy_switch_bp_2500_mode(struct xgbe_prv_data *pdata)
{
	return XGBE_MODE_KX_2500;
}

static enum xgbe_mode xgbe_phy_switch_bp_mode(struct xgbe_prv_data *pdata)
{
	/* If we are in KR switch to KX, and vice-versa */
	switch (xgbe_phy_cur_mode(pdata)) {
	case XGBE_MODE_KX_1000:
		return XGBE_MODE_KR;
	case XGBE_MODE_KR:
	default:
		return XGBE_MODE_KX_1000;
	}
}

static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		return xgbe_phy_switch_bp_mode(pdata);
	case XGBE_PORT_MODE_BACKPLANE_2500:
		return xgbe_phy_switch_bp_2500_mode(pdata);
	case XGBE_PORT_MODE_1000BASE_T:
	case XGBE_PORT_MODE_NBASE_T:
	case XGBE_PORT_MODE_10GBASE_T:
		return xgbe_phy_switch_baset_mode(pdata);
	case XGBE_PORT_MODE_1000BASE_X:
	case XGBE_PORT_MODE_10GBASE_R:
	case XGBE_PORT_MODE_SFP:
		/* No switching, so just return current mode */
		return xgbe_phy_cur_mode(pdata);
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static enum xgbe_mode xgbe_phy_get_basex_mode(struct xgbe_phy_data *phy_data,
					      int speed)
{
	switch (speed) {
	case SPEED_1000:
		return XGBE_MODE_X;
	case SPEED_10000:
		return XGBE_MODE_KR;
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static enum xgbe_mode xgbe_phy_get_baset_mode(struct xgbe_phy_data *phy_data,
					      int speed)
{
	switch (speed) {
	case SPEED_100:
		return XGBE_MODE_SGMII_100;
	case SPEED_1000:
		return XGBE_MODE_SGMII_1000;
	case SPEED_10000:
		return XGBE_MODE_KR;
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static enum xgbe_mode xgbe_phy_get_sfp_mode(struct xgbe_phy_data *phy_data,
					    int speed)
{
	switch (speed) {
	case SPEED_100:
		return XGBE_MODE_SGMII_100;
	case SPEED_1000:
		if (phy_data->sfp_base == XGBE_SFP_BASE_1000_T)
			return XGBE_MODE_SGMII_1000;
		else
			return XGBE_MODE_X;
	case SPEED_10000:
	case SPEED_UNKNOWN:
		return XGBE_MODE_SFI;
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static enum xgbe_mode xgbe_phy_get_bp_2500_mode(int speed)
{
	switch (speed) {
	case SPEED_2500:
		return XGBE_MODE_KX_2500;
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static enum xgbe_mode xgbe_phy_get_bp_mode(int speed)
{
	switch (speed) {
	case SPEED_1000:
		return XGBE_MODE_KX_1000;
	case SPEED_10000:
		return XGBE_MODE_KR;
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static enum xgbe_mode xgbe_phy_get_mode(struct xgbe_prv_data *pdata,
					int speed)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		return xgbe_phy_get_bp_mode(speed);
	case XGBE_PORT_MODE_BACKPLANE_2500:
		return xgbe_phy_get_bp_2500_mode(speed);
	case XGBE_PORT_MODE_1000BASE_T:
	case XGBE_PORT_MODE_NBASE_T:
	case XGBE_PORT_MODE_10GBASE_T:
		return xgbe_phy_get_baset_mode(phy_data, speed);
	case XGBE_PORT_MODE_1000BASE_X:
	case XGBE_PORT_MODE_10GBASE_R:
		return xgbe_phy_get_basex_mode(phy_data, speed);
	case XGBE_PORT_MODE_SFP:
		return xgbe_phy_get_sfp_mode(phy_data, speed);
	default:
		return XGBE_MODE_UNKNOWN;
	}
}

static void xgbe_phy_set_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
{
	switch (mode) {
	case XGBE_MODE_KX_1000:
		xgbe_phy_kx_1000_mode(pdata);
		break;
	case XGBE_MODE_KX_2500:
		xgbe_phy_kx_2500_mode(pdata);
		break;
	case XGBE_MODE_KR:
		xgbe_phy_kr_mode(pdata);
		break;
	case XGBE_MODE_SGMII_100:
		xgbe_phy_sgmii_100_mode(pdata);
		break;
	case XGBE_MODE_SGMII_1000:
		xgbe_phy_sgmii_1000_mode(pdata);
		break;
	case XGBE_MODE_X:
		xgbe_phy_x_mode(pdata);
		break;
	case XGBE_MODE_SFI:
		xgbe_phy_sfi_mode(pdata);
		break;
	default:
		break;
	}
}

static bool xgbe_phy_check_mode(struct xgbe_prv_data *pdata,
				enum xgbe_mode mode, u32 advert)
{
	if (pdata->phy.autoneg == AUTONEG_ENABLE) {
		if (pdata->phy.advertising & advert)
			return true;
	} else {
		enum xgbe_mode cur_mode;

		cur_mode = xgbe_phy_get_mode(pdata, pdata->phy.speed);
		if (cur_mode == mode)
			return true;
	}

	return false;
}

static bool xgbe_phy_use_basex_mode(struct xgbe_prv_data *pdata,
				    enum xgbe_mode mode)
{
	switch (mode) {
	case XGBE_MODE_X:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_1000baseT_Full);
	case XGBE_MODE_KR:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_10000baseT_Full);
	default:
		return false;
	}
}

static bool xgbe_phy_use_baset_mode(struct xgbe_prv_data *pdata,
				    enum xgbe_mode mode)
{
	switch (mode) {
	case XGBE_MODE_SGMII_100:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_100baseT_Full);
	case XGBE_MODE_SGMII_1000:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_1000baseT_Full);
	case XGBE_MODE_KR:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_10000baseT_Full);
	default:
		return false;
	}
}

static bool xgbe_phy_use_sfp_mode(struct xgbe_prv_data *pdata,
				  enum xgbe_mode mode)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (mode) {
	case XGBE_MODE_X:
		if (phy_data->sfp_base == XGBE_SFP_BASE_1000_T)
			return false;
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_1000baseT_Full);
	case XGBE_MODE_SGMII_100:
		if (phy_data->sfp_base != XGBE_SFP_BASE_1000_T)
			return false;
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_100baseT_Full);
	case XGBE_MODE_SGMII_1000:
		if (phy_data->sfp_base != XGBE_SFP_BASE_1000_T)
			return false;
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_1000baseT_Full);
	case XGBE_MODE_SFI:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_10000baseT_Full);
	default:
		return false;
	}
}

static bool xgbe_phy_use_bp_2500_mode(struct xgbe_prv_data *pdata,
				      enum xgbe_mode mode)
{
	switch (mode) {
	case XGBE_MODE_KX_2500:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_2500baseX_Full);
	default:
		return false;
	}
}

static bool xgbe_phy_use_bp_mode(struct xgbe_prv_data *pdata,
				 enum xgbe_mode mode)
{
	switch (mode) {
	case XGBE_MODE_KX_1000:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_1000baseKX_Full);
	case XGBE_MODE_KR:
		return xgbe_phy_check_mode(pdata, mode,
					   ADVERTISED_10000baseKR_Full);
	default:
		return false;
	}
}

static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		return xgbe_phy_use_bp_mode(pdata, mode);
	case XGBE_PORT_MODE_BACKPLANE_2500:
		return xgbe_phy_use_bp_2500_mode(pdata, mode);
	case XGBE_PORT_MODE_1000BASE_T:
	case XGBE_PORT_MODE_NBASE_T:
	case XGBE_PORT_MODE_10GBASE_T:
		return xgbe_phy_use_baset_mode(pdata, mode);
	case XGBE_PORT_MODE_1000BASE_X:
	case XGBE_PORT_MODE_10GBASE_R:
		return xgbe_phy_use_basex_mode(pdata, mode);
	case XGBE_PORT_MODE_SFP:
		return xgbe_phy_use_sfp_mode(pdata, mode);
	default:
		return false;
	}
}

static bool xgbe_phy_valid_speed_basex_mode(struct xgbe_phy_data *phy_data,
					    int speed)
{
	switch (speed) {
	case SPEED_1000:
		return (phy_data->port_mode == XGBE_PORT_MODE_1000BASE_X);
	case SPEED_10000:
		return (phy_data->port_mode == XGBE_PORT_MODE_10GBASE_R);
	default:
		return false;
	}
}

static bool xgbe_phy_valid_speed_baset_mode(struct xgbe_phy_data *phy_data,
					    int speed)
{
	switch (speed) {
	case SPEED_100:
	case SPEED_1000:
		return true;
	case SPEED_10000:
		return (phy_data->port_mode == XGBE_PORT_MODE_10GBASE_T);
	default:
		return false;
	}
}

static bool xgbe_phy_valid_speed_sfp_mode(struct xgbe_phy_data *phy_data,
					  int speed)
{
	switch (speed) {
	case SPEED_100:
		return (phy_data->sfp_speed == XGBE_SFP_SPEED_100_1000);
	case SPEED_1000:
		return ((phy_data->sfp_speed == XGBE_SFP_SPEED_100_1000) ||
			(phy_data->sfp_speed == XGBE_SFP_SPEED_1000));
	case SPEED_10000:
		return (phy_data->sfp_speed == XGBE_SFP_SPEED_10000);
	default:
		return false;
	}
}

static bool xgbe_phy_valid_speed_bp_2500_mode(int speed)
{
	switch (speed) {
	case SPEED_2500:
		return true;
	default:
		return false;
	}
}

static bool xgbe_phy_valid_speed_bp_mode(int speed)
{
	switch (speed) {
	case SPEED_1000:
	case SPEED_10000:
		return true;
	default:
		return false;
	}
}

static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		return xgbe_phy_valid_speed_bp_mode(speed);
	case XGBE_PORT_MODE_BACKPLANE_2500:
		return xgbe_phy_valid_speed_bp_2500_mode(speed);
	case XGBE_PORT_MODE_1000BASE_T:
	case XGBE_PORT_MODE_NBASE_T:
	case XGBE_PORT_MODE_10GBASE_T:
		return xgbe_phy_valid_speed_baset_mode(phy_data, speed);
	case XGBE_PORT_MODE_1000BASE_X:
	case XGBE_PORT_MODE_10GBASE_R:
		return xgbe_phy_valid_speed_basex_mode(phy_data, speed);
	case XGBE_PORT_MODE_SFP:
		return xgbe_phy_valid_speed_sfp_mode(phy_data, speed);
	default:
		return false;
	}
}

static int xgbe_phy_link_status(struct xgbe_prv_data *pdata, int *an_restart)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int reg;
	int ret;

	*an_restart = 0;

	if (phy_data->port_mode == XGBE_PORT_MODE_SFP) {
		/* Check SFP signals */
		xgbe_phy_sfp_detect(pdata);

		if (phy_data->sfp_changed) {
			*an_restart = 1;
			return 0;
		}

		if (phy_data->sfp_mod_absent || phy_data->sfp_rx_los)
			return 0;
	}

	if (phy_data->phydev) {
		/* Check external PHY */
		ret = phy_read_status(phy_data->phydev);
		if (ret < 0)
			return 0;

		if ((pdata->phy.autoneg == AUTONEG_ENABLE) &&
		    !phy_aneg_done(phy_data->phydev))
			return 0;

		if (!phy_data->phydev->link)
			return 0;
	}

	/* Link status is latched low, so read once to clear
	 * and then read again to get current state
	 */
	reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
	reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
	if (reg & MDIO_STAT1_LSTATUS)
		return 1;

	/* No link, attempt a receiver reset cycle */
	if (phy_data->rrc_count++) {
		phy_data->rrc_count = 0;
		xgbe_phy_rrc(pdata);
	}

	return 0;
}

static void xgbe_phy_sfp_gpio_setup(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int reg;

	reg = XP_IOREAD(pdata, XP_PROP_3);

	phy_data->sfp_gpio_address = XGBE_GPIO_ADDRESS_PCA9555 +
				     XP_GET_BITS(reg, XP_PROP_3, GPIO_ADDR);

	phy_data->sfp_gpio_mask = XP_GET_BITS(reg, XP_PROP_3, GPIO_MASK);

	phy_data->sfp_gpio_rx_los = XP_GET_BITS(reg, XP_PROP_3,
						GPIO_RX_LOS);
	phy_data->sfp_gpio_tx_fault = XP_GET_BITS(reg, XP_PROP_3,
						  GPIO_TX_FAULT);
	phy_data->sfp_gpio_mod_absent = XP_GET_BITS(reg, XP_PROP_3,
						    GPIO_MOD_ABS);
	phy_data->sfp_gpio_rate_select = XP_GET_BITS(reg, XP_PROP_3,
						     GPIO_RATE_SELECT);

	if (netif_msg_probe(pdata)) {
		dev_dbg(pdata->dev, "SFP: gpio_address=%#x\n",
			phy_data->sfp_gpio_address);
		dev_dbg(pdata->dev, "SFP: gpio_mask=%#x\n",
			phy_data->sfp_gpio_mask);
		dev_dbg(pdata->dev, "SFP: gpio_rx_los=%u\n",
			phy_data->sfp_gpio_rx_los);
		dev_dbg(pdata->dev, "SFP: gpio_tx_fault=%u\n",
			phy_data->sfp_gpio_tx_fault);
		dev_dbg(pdata->dev, "SFP: gpio_mod_absent=%u\n",
			phy_data->sfp_gpio_mod_absent);
		dev_dbg(pdata->dev, "SFP: gpio_rate_select=%u\n",
			phy_data->sfp_gpio_rate_select);
	}
}

static void xgbe_phy_sfp_comm_setup(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int reg, mux_addr_hi, mux_addr_lo;

	reg = XP_IOREAD(pdata, XP_PROP_4);

	mux_addr_hi = XP_GET_BITS(reg, XP_PROP_4, MUX_ADDR_HI);
	mux_addr_lo = XP_GET_BITS(reg, XP_PROP_4, MUX_ADDR_LO);
	if (mux_addr_lo == XGBE_SFP_DIRECT)
		return;

	phy_data->sfp_comm = XGBE_SFP_COMM_PCA9545;
	phy_data->sfp_mux_address = (mux_addr_hi << 2) + mux_addr_lo;
	phy_data->sfp_mux_channel = XP_GET_BITS(reg, XP_PROP_4, MUX_CHAN);

	if (netif_msg_probe(pdata)) {
		dev_dbg(pdata->dev, "SFP: mux_address=%#x\n",
			phy_data->sfp_mux_address);
		dev_dbg(pdata->dev, "SFP: mux_channel=%u\n",
			phy_data->sfp_mux_channel);
	}
}

static void xgbe_phy_sfp_setup(struct xgbe_prv_data *pdata)
{
	xgbe_phy_sfp_comm_setup(pdata);
	xgbe_phy_sfp_gpio_setup(pdata);
}

static int xgbe_phy_int_mdio_reset(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int ret;

	ret = pdata->hw_if.set_gpio(pdata, phy_data->mdio_reset_gpio);
	if (ret)
		return ret;

	ret = pdata->hw_if.clr_gpio(pdata, phy_data->mdio_reset_gpio);

	return ret;
}

static int xgbe_phy_i2c_mdio_reset(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	u8 gpio_reg, gpio_ports[2], gpio_data[3];
	int ret;

	/* Read the output port registers */
	gpio_reg = 2;
	ret = xgbe_phy_i2c_read(pdata, phy_data->mdio_reset_addr,
				&gpio_reg, sizeof(gpio_reg),
				gpio_ports, sizeof(gpio_ports));
	if (ret)
		return ret;

	/* Prepare to write the GPIO data */
	gpio_data[0] = 2;
	gpio_data[1] = gpio_ports[0];
	gpio_data[2] = gpio_ports[1];

	/* Set the GPIO pin */
	if (phy_data->mdio_reset_gpio < 8)
		gpio_data[1] |= (1 << (phy_data->mdio_reset_gpio % 8));
	else
		gpio_data[2] |= (1 << (phy_data->mdio_reset_gpio % 8));

	/* Write the output port registers */
	ret = xgbe_phy_i2c_write(pdata, phy_data->mdio_reset_addr,
				 gpio_data, sizeof(gpio_data));
	if (ret)
		return ret;

	/* Clear the GPIO pin */
	if (phy_data->mdio_reset_gpio < 8)
		gpio_data[1] &= ~(1 << (phy_data->mdio_reset_gpio % 8));
	else
		gpio_data[2] &= ~(1 << (phy_data->mdio_reset_gpio % 8));

	/* Write the output port registers */
	ret = xgbe_phy_i2c_write(pdata, phy_data->mdio_reset_addr,
				 gpio_data, sizeof(gpio_data));

	return ret;
}

static int xgbe_phy_mdio_reset(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	if (phy_data->conn_type != XGBE_CONN_TYPE_MDIO)
		return 0;

	ret = xgbe_phy_get_comm_ownership(pdata);
	if (ret)
		return ret;

	if (phy_data->mdio_reset == XGBE_MDIO_RESET_I2C_GPIO)
		ret = xgbe_phy_i2c_mdio_reset(pdata);
	else if (phy_data->mdio_reset == XGBE_MDIO_RESET_INT_GPIO)
		ret = xgbe_phy_int_mdio_reset(pdata);

	xgbe_phy_put_comm_ownership(pdata);

	return ret;
}

static bool xgbe_phy_redrv_error(struct xgbe_phy_data *phy_data)
{
	if (!phy_data->redrv)
		return false;

	if (phy_data->redrv_if >= XGBE_PHY_REDRV_IF_MAX)
		return true;

	switch (phy_data->redrv_model) {
	case XGBE_PHY_REDRV_MODEL_4223:
		if (phy_data->redrv_lane > 3)
			return true;
		break;
	case XGBE_PHY_REDRV_MODEL_4227:
		if (phy_data->redrv_lane > 1)
			return true;
		break;
	default:
		return true;
	}

	return false;
}

static int xgbe_phy_mdio_reset_setup(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	unsigned int reg;

	if (phy_data->conn_type != XGBE_CONN_TYPE_MDIO)
		return 0;

	reg = XP_IOREAD(pdata, XP_PROP_3);
	phy_data->mdio_reset = XP_GET_BITS(reg, XP_PROP_3, MDIO_RESET);
	switch (phy_data->mdio_reset) {
	case XGBE_MDIO_RESET_NONE:
	case XGBE_MDIO_RESET_I2C_GPIO:
	case XGBE_MDIO_RESET_INT_GPIO:
		break;
	default:
		dev_err(pdata->dev, "unsupported MDIO reset (%#x)\n",
			phy_data->mdio_reset);
		return -EINVAL;
	}

	if (phy_data->mdio_reset == XGBE_MDIO_RESET_I2C_GPIO) {
		phy_data->mdio_reset_addr = XGBE_GPIO_ADDRESS_PCA9555 +
					    XP_GET_BITS(reg, XP_PROP_3,
							MDIO_RESET_I2C_ADDR);
		phy_data->mdio_reset_gpio = XP_GET_BITS(reg, XP_PROP_3,
							MDIO_RESET_I2C_GPIO);
	} else if (phy_data->mdio_reset == XGBE_MDIO_RESET_INT_GPIO) {
		phy_data->mdio_reset_gpio = XP_GET_BITS(reg, XP_PROP_3,
							MDIO_RESET_INT_GPIO);
	}

	return 0;
}

static bool xgbe_phy_port_mode_mismatch(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000))
			return false;
		break;
	case XGBE_PORT_MODE_BACKPLANE_2500:
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_2500)
			return false;
		break;
	case XGBE_PORT_MODE_1000BASE_T:
		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000))
			return false;
		break;
	case XGBE_PORT_MODE_1000BASE_X:
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000)
			return false;
		break;
	case XGBE_PORT_MODE_NBASE_T:
		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_2500))
			return false;
		break;
	case XGBE_PORT_MODE_10GBASE_T:
		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000))
			return false;
		break;
	case XGBE_PORT_MODE_10GBASE_R:
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000)
			return false;
		break;
	case XGBE_PORT_MODE_SFP:
		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000))
			return false;
		break;
	default:
		break;
	}

	return true;
}

static bool xgbe_phy_conn_type_mismatch(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_BACKPLANE:
	case XGBE_PORT_MODE_BACKPLANE_2500:
		if (phy_data->conn_type == XGBE_CONN_TYPE_BACKPLANE)
			return false;
		break;
	case XGBE_PORT_MODE_1000BASE_T:
	case XGBE_PORT_MODE_1000BASE_X:
	case XGBE_PORT_MODE_NBASE_T:
	case XGBE_PORT_MODE_10GBASE_T:
	case XGBE_PORT_MODE_10GBASE_R:
		if (phy_data->conn_type == XGBE_CONN_TYPE_MDIO)
			return false;
		break;
	case XGBE_PORT_MODE_SFP:
		if (phy_data->conn_type == XGBE_CONN_TYPE_SFP)
			return false;
		break;
	default:
		break;
	}

	return true;
}

static bool xgbe_phy_port_enabled(struct xgbe_prv_data *pdata)
{
	unsigned int reg;

	reg = XP_IOREAD(pdata, XP_PROP_0);
	if (!XP_GET_BITS(reg, XP_PROP_0, PORT_SPEEDS))
		return false;
	if (!XP_GET_BITS(reg, XP_PROP_0, CONN_TYPE))
		return false;

	return true;
}

static void xgbe_phy_stop(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	/* If we have an external PHY, free it */
	xgbe_phy_free_phy_device(pdata);

	/* Reset SFP data */
	xgbe_phy_sfp_reset(phy_data);
	xgbe_phy_sfp_mod_absent(pdata);

	/* Power off the PHY */
	xgbe_phy_power_off(pdata);

	/* Stop the I2C controller */
	pdata->i2c_if.i2c_stop(pdata);
}

static int xgbe_phy_start(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	int ret;

	/* Start the I2C controller */
	ret = pdata->i2c_if.i2c_start(pdata);
	if (ret)
		return ret;

	/* Start in highest supported mode */
	xgbe_phy_set_mode(pdata, phy_data->start_mode);

	/* After starting the I2C controller, we can check for an SFP */
	switch (phy_data->port_mode) {
	case XGBE_PORT_MODE_SFP:
		xgbe_phy_sfp_detect(pdata);
		break;
	default:
		break;
	}

	/* If we have an external PHY, start it */
	ret = xgbe_phy_find_phy_device(pdata);
	if (ret)
		goto err_i2c;

	return 0;

err_i2c:
	pdata->i2c_if.i2c_stop(pdata);

	return ret;
}

static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;
	enum xgbe_mode cur_mode;
	int ret;

	/* Reset by power cycling the PHY */
	cur_mode = phy_data->cur_mode;
	xgbe_phy_power_off(pdata);
	xgbe_phy_set_mode(pdata, cur_mode);

	if (!phy_data->phydev)
		return 0;

	/* Reset the external PHY */
	ret = xgbe_phy_mdio_reset(pdata);
	if (ret)
		return ret;

	return phy_init_hw(phy_data->phydev);
}

static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data = pdata->phy_data;

	/* Unregister for driving external PHYs */
	mdiobus_unregister(phy_data->mii);
}

static int xgbe_phy_init(struct xgbe_prv_data *pdata)
{
	struct xgbe_phy_data *phy_data;
	struct mii_bus *mii;
	unsigned int reg;
	int ret;

	/* Check if enabled */
	if (!xgbe_phy_port_enabled(pdata)) {
		dev_info(pdata->dev, "device is not enabled\n");
		return -ENODEV;
	}

	/* Initialize the I2C controller */
	ret = pdata->i2c_if.i2c_init(pdata);
	if (ret)
		return ret;

	phy_data = devm_kzalloc(pdata->dev, sizeof(*phy_data), GFP_KERNEL);
	if (!phy_data)
		return -ENOMEM;
	pdata->phy_data = phy_data;

	reg = XP_IOREAD(pdata, XP_PROP_0);
	phy_data->port_mode = XP_GET_BITS(reg, XP_PROP_0, PORT_MODE);
	phy_data->port_id = XP_GET_BITS(reg, XP_PROP_0, PORT_ID);
	phy_data->port_speeds = XP_GET_BITS(reg, XP_PROP_0, PORT_SPEEDS);
	phy_data->conn_type = XP_GET_BITS(reg, XP_PROP_0, CONN_TYPE);
	phy_data->mdio_addr = XP_GET_BITS(reg, XP_PROP_0, MDIO_ADDR);
	if (netif_msg_probe(pdata)) {
		dev_dbg(pdata->dev, "port mode=%u\n", phy_data->port_mode);
		dev_dbg(pdata->dev, "port id=%u\n", phy_data->port_id);
		dev_dbg(pdata->dev, "port speeds=%#x\n", phy_data->port_speeds);
		dev_dbg(pdata->dev, "conn type=%u\n", phy_data->conn_type);
		dev_dbg(pdata->dev, "mdio addr=%u\n", phy_data->mdio_addr);
	}

	reg = XP_IOREAD(pdata, XP_PROP_4);
	phy_data->redrv = XP_GET_BITS(reg, XP_PROP_4, REDRV_PRESENT);
	phy_data->redrv_if = XP_GET_BITS(reg, XP_PROP_4, REDRV_IF);
	phy_data->redrv_addr = XP_GET_BITS(reg, XP_PROP_4, REDRV_ADDR);
	phy_data->redrv_lane = XP_GET_BITS(reg, XP_PROP_4, REDRV_LANE);
	phy_data->redrv_model = XP_GET_BITS(reg, XP_PROP_4, REDRV_MODEL);
	if (phy_data->redrv && netif_msg_probe(pdata)) {
		dev_dbg(pdata->dev, "redrv present\n");
		dev_dbg(pdata->dev, "redrv i/f=%u\n", phy_data->redrv_if);
		dev_dbg(pdata->dev, "redrv addr=%#x\n", phy_data->redrv_addr);
		dev_dbg(pdata->dev, "redrv lane=%u\n", phy_data->redrv_lane);
		dev_dbg(pdata->dev, "redrv model=%u\n", phy_data->redrv_model);
	}

	/* Validate the connection requested */
	if (xgbe_phy_conn_type_mismatch(pdata)) {
		dev_err(pdata->dev, "phy mode/connection mismatch (%#x/%#x)\n",
			phy_data->port_mode, phy_data->conn_type);
		return -EINVAL;
	}

	/* Validate the mode requested */
	if (xgbe_phy_port_mode_mismatch(pdata)) {
		dev_err(pdata->dev, "phy mode/speed mismatch (%#x/%#x)\n",
			phy_data->port_mode, phy_data->port_speeds);
		return -EINVAL;
	}

	/* Check for and validate MDIO reset support */
	ret = xgbe_phy_mdio_reset_setup(pdata);
	if (ret)
		return ret;

	/* Validate the re-driver information */
	if (xgbe_phy_redrv_error(phy_data)) {
		dev_err(pdata->dev, "phy re-driver settings error\n");
		return -EINVAL;
	}
	pdata->kr_redrv = phy_data->redrv;

	/* Indicate current mode is unknown */
	phy_data->cur_mode = XGBE_MODE_UNKNOWN;

	/* Initialize supported features */
	pdata->phy.supported = 0;

	switch (phy_data->port_mode) {
	/* Backplane support */
	case XGBE_PORT_MODE_BACKPLANE:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_Backplane;
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
			pdata->phy.supported |= SUPPORTED_1000baseKX_Full;
			phy_data->start_mode = XGBE_MODE_KX_1000;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000) {
			pdata->phy.supported |= SUPPORTED_10000baseKR_Full;
			if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
				pdata->phy.supported |=
					SUPPORTED_10000baseR_FEC;
			phy_data->start_mode = XGBE_MODE_KR;
		}

		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
		break;
	case XGBE_PORT_MODE_BACKPLANE_2500:
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_Backplane;
		pdata->phy.supported |= SUPPORTED_2500baseX_Full;
		phy_data->start_mode = XGBE_MODE_KX_2500;

		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
		break;

	/* MDIO 1GBase-T support */
	case XGBE_PORT_MODE_1000BASE_T:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_TP;
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
			pdata->phy.supported |= SUPPORTED_100baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_100;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_1000;
		}

		phy_data->phydev_mode = XGBE_MDIO_MODE_CL22;
		break;

	/* MDIO Base-X support */
	case XGBE_PORT_MODE_1000BASE_X:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_FIBRE;
		pdata->phy.supported |= SUPPORTED_1000baseT_Full;
		phy_data->start_mode = XGBE_MODE_X;

		phy_data->phydev_mode = XGBE_MDIO_MODE_CL22;
		break;

	/* MDIO NBase-T support */
	case XGBE_PORT_MODE_NBASE_T:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_TP;
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
			pdata->phy.supported |= SUPPORTED_100baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_100;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_1000;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_2500) {
			pdata->phy.supported |= SUPPORTED_2500baseX_Full;
			phy_data->start_mode = XGBE_MODE_KX_2500;
		}

		phy_data->phydev_mode = XGBE_MDIO_MODE_CL45;
		break;

	/* 10GBase-T support */
	case XGBE_PORT_MODE_10GBASE_T:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_TP;
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
			pdata->phy.supported |= SUPPORTED_100baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_100;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_1000;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000) {
			pdata->phy.supported |= SUPPORTED_10000baseT_Full;
			phy_data->start_mode = XGBE_MODE_KR;
		}

		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
		break;

	/* 10GBase-R support */
	case XGBE_PORT_MODE_10GBASE_R:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_TP;
		pdata->phy.supported |= SUPPORTED_10000baseT_Full;
		if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
			pdata->phy.supported |= SUPPORTED_10000baseR_FEC;
		phy_data->start_mode = XGBE_MODE_SFI;

		phy_data->phydev_mode = XGBE_MDIO_MODE_NONE;
		break;

	/* SFP support */
	case XGBE_PORT_MODE_SFP:
		pdata->phy.supported |= SUPPORTED_Autoneg;
		pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
		pdata->phy.supported |= SUPPORTED_TP;
		pdata->phy.supported |= SUPPORTED_FIBRE;
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_100) {
			pdata->phy.supported |= SUPPORTED_100baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_100;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) {
			pdata->phy.supported |= SUPPORTED_1000baseT_Full;
			phy_data->start_mode = XGBE_MODE_SGMII_1000;
		}
		if (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000) {
			pdata->phy.supported |= SUPPORTED_10000baseT_Full;
			phy_data->start_mode = XGBE_MODE_SFI;
			if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
				pdata->phy.supported |=
					SUPPORTED_10000baseR_FEC;
		}

		phy_data->phydev_mode = XGBE_MDIO_MODE_CL22;

		xgbe_phy_sfp_setup(pdata);
		break;
	default:
		return -EINVAL;
	}

	if (netif_msg_probe(pdata))
		dev_dbg(pdata->dev, "phy supported=%#x\n",
			pdata->phy.supported);

	if ((phy_data->conn_type & XGBE_CONN_TYPE_MDIO) &&
	    (phy_data->phydev_mode != XGBE_MDIO_MODE_NONE)) {
		ret = pdata->hw_if.set_ext_mii_mode(pdata, phy_data->mdio_addr,
						    phy_data->phydev_mode);
		if (ret) {
			dev_err(pdata->dev,
				"mdio port/clause not compatible (%d/%u)\n",
				phy_data->mdio_addr, phy_data->phydev_mode);
			return -EINVAL;
		}
	}

	if (phy_data->redrv && !phy_data->redrv_if) {
		ret = pdata->hw_if.set_ext_mii_mode(pdata, phy_data->redrv_addr,
						    XGBE_MDIO_MODE_CL22);
		if (ret) {
			dev_err(pdata->dev,
				"redriver mdio port not compatible (%u)\n",
				phy_data->redrv_addr);
			return -EINVAL;
		}
	}

	/* Register for driving external PHYs */
	mii = devm_mdiobus_alloc(pdata->dev);
	if (!mii) {
		dev_err(pdata->dev, "mdiobus_alloc failed\n");
		return -ENOMEM;
	}

	mii->priv = pdata;
	mii->name = "amd-xgbe-mii";
	mii->read = xgbe_phy_mii_read;
	mii->write = xgbe_phy_mii_write;
	mii->parent = pdata->dev;
	mii->phy_mask = ~0;
	snprintf(mii->id, sizeof(mii->id), "%s", dev_name(pdata->dev));
	ret = mdiobus_register(mii);
	if (ret) {
		dev_err(pdata->dev, "mdiobus_register failed\n");
		return ret;
	}
	phy_data->mii = mii;

	return 0;
}

void xgbe_init_function_ptrs_phy_v2(struct xgbe_phy_if *phy_if)
{
	struct xgbe_phy_impl_if *phy_impl = &phy_if->phy_impl;

	phy_impl->init			= xgbe_phy_init;
	phy_impl->exit			= xgbe_phy_exit;

	phy_impl->reset			= xgbe_phy_reset;
	phy_impl->start			= xgbe_phy_start;
	phy_impl->stop			= xgbe_phy_stop;

	phy_impl->link_status		= xgbe_phy_link_status;

	phy_impl->valid_speed		= xgbe_phy_valid_speed;

	phy_impl->use_mode		= xgbe_phy_use_mode;
	phy_impl->set_mode		= xgbe_phy_set_mode;
	phy_impl->get_mode		= xgbe_phy_get_mode;
	phy_impl->switch_mode		= xgbe_phy_switch_mode;
	phy_impl->cur_mode		= xgbe_phy_cur_mode;

	phy_impl->an_mode		= xgbe_phy_an_mode;

	phy_impl->an_config		= xgbe_phy_an_config;

	phy_impl->an_advertising	= xgbe_phy_an_advertising;

	phy_impl->an_outcome		= xgbe_phy_an_outcome;
}