amd-xgbe: Initial AMD 10GbE phylib driver

This patch provides the initial phylib driver in support
of the AMD 10GbE device.
Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/amd-xgbe-phy.c

+/*
+ * AMD 10Gb Ethernet PHY driver
+ *
+ * This file is available to you under your choice of the following two
+ * licenses:
+ *
+ * License 1: GPLv2
+ *
+ * Copyright (c) 2014 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/>.
+ *
+ *
+ * License 2: Modified BSD
+ *
+ * Copyright (c) 2014 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include <linux/mdio.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_device.h>
+#include <linux/uaccess.h>
+#include <asm/irq.h>
+
+
+MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION("1.0.0-a");
+MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
+
+#define XGBE_PHY_ID	0x000162d0
+#define XGBE_PHY_MASK	0xfffffff0
+
+#define XGBE_AN_INT_CMPLT		0x01
+#define XGBE_AN_INC_LINK		0x02
+#define XGBE_AN_PG_RCV			0x04
+
+#define XNP_MCF_NULL_MESSAGE		0x001
+#define XNP_ACK_PROCESSED		(1 << 12)
+#define XNP_MP_FORMATTED		(1 << 13)
+#define XNP_NP_EXCHANGE			(1 << 15)
+
+#ifndef MDIO_PMA_10GBR_PMD_CTRL
+#define MDIO_PMA_10GBR_PMD_CTRL		0x0096
+#endif
+#ifndef MDIO_PMA_10GBR_FEC_CTRL
+#define MDIO_PMA_10GBR_FEC_CTRL		0x00ab
+#endif
+#ifndef MDIO_AN_XNP
+#define MDIO_AN_XNP			0x0016
+#endif
+
+#ifndef MDIO_AN_INTMASK
+#define MDIO_AN_INTMASK			0x8001
+#endif
+#ifndef MDIO_AN_INT
+#define MDIO_AN_INT			0x8002
+#endif
+
+#ifndef MDIO_CTRL1_SPEED1G
+#define MDIO_CTRL1_SPEED1G		(MDIO_CTRL1_SPEED10G & ~BMCR_SPEED100)
+#endif
+
+/* SerDes integration register offsets */
+#define SIR0_STATUS			0x0040
+#define SIR1_SPEED			0x0000
+
+/* SerDes integration register entry bit positions and sizes */
+#define SIR0_STATUS_RX_READY_INDEX	0
+#define SIR0_STATUS_RX_READY_WIDTH	1
+#define SIR0_STATUS_TX_READY_INDEX	8
+#define SIR0_STATUS_TX_READY_WIDTH	1
+#define SIR1_SPEED_DATARATE_INDEX	4
+#define SIR1_SPEED_DATARATE_WIDTH	2
+#define SIR1_SPEED_PI_SPD_SEL_INDEX	12
+#define SIR1_SPEED_PI_SPD_SEL_WIDTH	4
+#define SIR1_SPEED_PLLSEL_INDEX		3
+#define SIR1_SPEED_PLLSEL_WIDTH		1
+#define SIR1_SPEED_RATECHANGE_INDEX	6
+#define SIR1_SPEED_RATECHANGE_WIDTH	1
+#define SIR1_SPEED_TXAMP_INDEX		8
+#define SIR1_SPEED_TXAMP_WIDTH		4
+#define SIR1_SPEED_WORDMODE_INDEX	0
+#define SIR1_SPEED_WORDMODE_WIDTH	3
+
+#define SPEED_10000_CDR			0x7
+#define SPEED_10000_PLL			0x1
+#define SPEED_10000_RATE		0x0
+#define SPEED_10000_TXAMP		0xa
+#define SPEED_10000_WORD		0x7
+
+#define SPEED_2500_CDR			0x2
+#define SPEED_2500_PLL			0x0
+#define SPEED_2500_RATE			0x2
+#define SPEED_2500_TXAMP		0xf
+#define SPEED_2500_WORD			0x1
+
+#define SPEED_1000_CDR			0x2
+#define SPEED_1000_PLL			0x0
+#define SPEED_1000_RATE			0x3
+#define SPEED_1000_TXAMP		0xf
+#define SPEED_1000_WORD			0x1
+
+
+/* SerDes RxTx register offsets */
+#define RXTX_REG20			0x0050
+#define RXTX_REG114			0x01c8
+
+/* SerDes RxTx register entry bit positions and sizes */
+#define RXTX_REG20_BLWC_ENA_INDEX	2
+#define RXTX_REG20_BLWC_ENA_WIDTH	1
+#define RXTX_REG114_PQ_REG_INDEX	9
+#define RXTX_REG114_PQ_REG_WIDTH	7
+
+#define RXTX_10000_BLWC			0
+#define RXTX_10000_PQ			0x1e
+
+#define RXTX_2500_BLWC			1
+#define RXTX_2500_PQ			0xa
+
+#define RXTX_1000_BLWC			1
+#define RXTX_1000_PQ			0xa
+
+/* Bit setting and getting macros
+ *  The get macro will extract the current bit field value from within
+ *  the variable
+ *
+ *  The set macro will clear the current bit field value within the
+ *  variable and then set the bit field of the variable to the
+ *  specified value
+ */
+#define GET_BITS(_var, _index, _width)					\
+	(((_var) >> (_index)) & ((0x1 << (_width)) - 1))
+
+#define SET_BITS(_var, _index, _width, _val)				\
+do {									\
+	(_var) &= ~(((0x1 << (_width)) - 1) << (_index));		\
+	(_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index));	\
+} while (0)
+
+/* Macros for reading or writing SerDes integration registers
+ *  The ioread macros will get bit fields or full values using the
+ *  register definitions formed using the input names
+ *
+ *  The iowrite macros will set bit fields or full values using the
+ *  register definitions formed using the input names
+ */
+#define XSIR0_IOREAD(_priv, _reg)					\
+	ioread16((_priv)->sir0_regs + _reg)
+
+#define XSIR0_IOREAD_BITS(_priv, _reg, _field)				\
+	GET_BITS(XSIR0_IOREAD((_priv), _reg),				\
+		 _reg##_##_field##_INDEX,				\
+		 _reg##_##_field##_WIDTH)
+
+#define XSIR0_IOWRITE(_priv, _reg, _val)				\
+	iowrite16((_val), (_priv)->sir0_regs + _reg)
+
+#define XSIR0_IOWRITE_BITS(_priv, _reg, _field, _val)			\
+do {									\
+	u16 reg_val = XSIR0_IOREAD((_priv), _reg);			\
+	SET_BITS(reg_val,						\
+		 _reg##_##_field##_INDEX,				\
+		 _reg##_##_field##_WIDTH, (_val));			\
+	XSIR0_IOWRITE((_priv), _reg, reg_val);				\
+} while (0)
+
+#define XSIR1_IOREAD(_priv, _reg)					\
+	ioread16((_priv)->sir1_regs + _reg)
+
+#define XSIR1_IOREAD_BITS(_priv, _reg, _field)				\
+	GET_BITS(XSIR1_IOREAD((_priv), _reg),				\
+		 _reg##_##_field##_INDEX,				\
+		 _reg##_##_field##_WIDTH)
+
+#define XSIR1_IOWRITE(_priv, _reg, _val)				\
+	iowrite16((_val), (_priv)->sir1_regs + _reg)
+
+#define XSIR1_IOWRITE_BITS(_priv, _reg, _field, _val)			\
+do {									\
+	u16 reg_val = XSIR1_IOREAD((_priv), _reg);			\
+	SET_BITS(reg_val,						\
+		 _reg##_##_field##_INDEX,				\
+		 _reg##_##_field##_WIDTH, (_val));			\
+	XSIR1_IOWRITE((_priv), _reg, reg_val);				\
+} while (0)
+
+
+/* Macros for reading or writing SerDes RxTx registers
+ *  The ioread macros will get bit fields or full values using the
+ *  register definitions formed using the input names
+ *
+ *  The iowrite macros will set bit fields or full values using the
+ *  register definitions formed using the input names
+ */
+#define XRXTX_IOREAD(_priv, _reg)					\
+	ioread16((_priv)->rxtx_regs + _reg)
+
+#define XRXTX_IOREAD_BITS(_priv, _reg, _field)				\
+	GET_BITS(XRXTX_IOREAD((_priv), _reg),				\
+		 _reg##_##_field##_INDEX,				\
+		 _reg##_##_field##_WIDTH)
+
+#define XRXTX_IOWRITE(_priv, _reg, _val)				\
+	iowrite16((_val), (_priv)->rxtx_regs + _reg)
+
+#define XRXTX_IOWRITE_BITS(_priv, _reg, _field, _val)			\
+do {									\
+	u16 reg_val = XRXTX_IOREAD((_priv), _reg);			\
+	SET_BITS(reg_val,						\
+		 _reg##_##_field##_INDEX,				\
+		 _reg##_##_field##_WIDTH, (_val));			\
+	XRXTX_IOWRITE((_priv), _reg, reg_val);				\
+} while (0)
+
+
+enum amd_xgbe_phy_an {
+	AMD_XGBE_AN_READY = 0,
+	AMD_XGBE_AN_START,
+	AMD_XGBE_AN_EVENT,
+	AMD_XGBE_AN_PAGE_RECEIVED,
+	AMD_XGBE_AN_INCOMPAT_LINK,
+	AMD_XGBE_AN_COMPLETE,
+	AMD_XGBE_AN_NO_LINK,
+	AMD_XGBE_AN_EXIT,
+	AMD_XGBE_AN_ERROR,
+};
+
+enum amd_xgbe_phy_rx {
+	AMD_XGBE_RX_READY = 0,
+	AMD_XGBE_RX_BPA,
+	AMD_XGBE_RX_XNP,
+	AMD_XGBE_RX_COMPLETE,
+};
+
+enum amd_xgbe_phy_mode {
+	AMD_XGBE_MODE_KR,
+	AMD_XGBE_MODE_KX,
+};
+
+struct amd_xgbe_phy_priv {
+	struct platform_device *pdev;
+	struct device *dev;
+
+	struct phy_device *phydev;
+
+	/* SerDes related mmio resources */
+	struct resource *rxtx_res;
+	struct resource *sir0_res;
+	struct resource *sir1_res;
+
+	/* SerDes related mmio registers */
+	void __iomem *rxtx_regs;	/* SerDes Rx/Tx CSRs */
+	void __iomem *sir0_regs;	/* SerDes integration registers (1/2) */
+	void __iomem *sir1_regs;	/* SerDes integration registers (2/2) */
+
+	/* Maintain link status for re-starting auto-negotiation */
+	unsigned int link;
+	enum amd_xgbe_phy_mode mode;
+
+	/* Auto-negotiation state machine support */
+	struct mutex an_mutex;
+	enum amd_xgbe_phy_an an_result;
+	enum amd_xgbe_phy_an an_state;
+	enum amd_xgbe_phy_rx kr_state;
+	enum amd_xgbe_phy_rx kx_state;
+	struct work_struct an_work;
+	struct workqueue_struct *an_workqueue;
+};
+
+static int amd_xgbe_an_enable_kr_training(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
+	if (ret < 0)
+		return ret;
+
+	ret |= 0x02;
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, ret);
+
+	return 0;
+}
+
+static int amd_xgbe_an_disable_kr_training(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~0x02;
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, ret);
+
+	return 0;
+}
+
+static int amd_xgbe_phy_pcs_power_cycle(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		return ret;
+
+	ret |= MDIO_CTRL1_LPOWER;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	usleep_range(75, 100);
+
+	ret &= ~MDIO_CTRL1_LPOWER;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	return 0;
+}
+
+static void amd_xgbe_phy_serdes_start_ratechange(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+
+	/* Assert Rx and Tx ratechange */
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, RATECHANGE, 1);
+}
+
+static void amd_xgbe_phy_serdes_complete_ratechange(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+
+	/* Release Rx and Tx ratechange */
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, RATECHANGE, 0);
+
+	/* Wait for Rx and Tx ready */
+	while (!XSIR0_IOREAD_BITS(priv, SIR0_STATUS, RX_READY) &&
+	       !XSIR0_IOREAD_BITS(priv, SIR0_STATUS, TX_READY))
+		usleep_range(10, 20);
+}
+
+static int amd_xgbe_phy_xgmii_mode(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	int ret;
+
+	/* Enable KR training */
+	ret = amd_xgbe_an_enable_kr_training(phydev);
+	if (ret < 0)
+		return ret;
+
+	/* Set PCS to KR/10G speed */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_PCS_CTRL2_TYPE;
+	ret |= MDIO_PCS_CTRL2_10GBR;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2, ret);
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_CTRL1_SPEEDSEL;
+	ret |= MDIO_CTRL1_SPEED10G;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	ret = amd_xgbe_phy_pcs_power_cycle(phydev);
+	if (ret < 0)
+		return ret;
+
+	/* Set SerDes to 10G speed */
+	amd_xgbe_phy_serdes_start_ratechange(phydev);
+
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_10000_RATE);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_10000_WORD);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP, SPEED_10000_TXAMP);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_10000_PLL);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PI_SPD_SEL, SPEED_10000_CDR);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, RXTX_10000_BLWC);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_10000_PQ);
+
+	amd_xgbe_phy_serdes_complete_ratechange(phydev);
+
+	priv->mode = AMD_XGBE_MODE_KR;
+
+	return 0;
+}
+
+static int amd_xgbe_phy_gmii_2500_mode(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	int ret;
+
+	/* Disable KR training */
+	ret = amd_xgbe_an_disable_kr_training(phydev);
+	if (ret < 0)
+		return ret;
+
+	/* Set PCS to KX/1G speed */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_PCS_CTRL2_TYPE;
+	ret |= MDIO_PCS_CTRL2_10GBX;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2, ret);
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_CTRL1_SPEEDSEL;
+	ret |= MDIO_CTRL1_SPEED1G;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	ret = amd_xgbe_phy_pcs_power_cycle(phydev);
+	if (ret < 0)
+		return ret;
+
+	/* Set SerDes to 2.5G speed */
+	amd_xgbe_phy_serdes_start_ratechange(phydev);
+
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_2500_RATE);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_2500_WORD);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP, SPEED_2500_TXAMP);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_2500_PLL);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PI_SPD_SEL, SPEED_2500_CDR);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, RXTX_2500_BLWC);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_2500_PQ);
+
+	amd_xgbe_phy_serdes_complete_ratechange(phydev);
+
+	priv->mode = AMD_XGBE_MODE_KX;
+
+	return 0;
+}
+
+static int amd_xgbe_phy_gmii_mode(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	int ret;
+
+	/* Disable KR training */
+	ret = amd_xgbe_an_disable_kr_training(phydev);
+	if (ret < 0)
+		return ret;
+
+	/* Set PCS to KX/1G speed */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_PCS_CTRL2_TYPE;
+	ret |= MDIO_PCS_CTRL2_10GBX;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2, ret);
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_CTRL1_SPEEDSEL;
+	ret |= MDIO_CTRL1_SPEED1G;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	ret = amd_xgbe_phy_pcs_power_cycle(phydev);
+	if (ret < 0)
+		return ret;
+
+	/* Set SerDes to 1G speed */
+	amd_xgbe_phy_serdes_start_ratechange(phydev);
+
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_1000_RATE);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_1000_WORD);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP, SPEED_1000_TXAMP);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_1000_PLL);
+	XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PI_SPD_SEL, SPEED_1000_CDR);
+
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA, RXTX_1000_BLWC);
+	XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG, RXTX_1000_PQ);
+
+	amd_xgbe_phy_serdes_complete_ratechange(phydev);
+
+	priv->mode = AMD_XGBE_MODE_KX;
+
+	return 0;
+}
+
+static int amd_xgbe_phy_switch_mode(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	int ret;
+
+	/* If we are in KR switch to KX, and vice-versa */
+	if (priv->mode == AMD_XGBE_MODE_KR)
+		ret = amd_xgbe_phy_gmii_mode(phydev);
+	else
+		ret = amd_xgbe_phy_xgmii_mode(phydev);
+
+	return ret;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_switch_mode(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = amd_xgbe_phy_switch_mode(phydev);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	return AMD_XGBE_AN_START;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_tx_training(struct phy_device *phydev,
+						    enum amd_xgbe_phy_rx *state)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	int ad_reg, lp_reg, ret;
+
+	*state = AMD_XGBE_RX_COMPLETE;
+
+	/* If we're in KX mode then we're done */
+	if (priv->mode == AMD_XGBE_MODE_KX)
+		return AMD_XGBE_AN_EVENT;
+
+	/* Enable/Disable FEC */
+	ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
+	if (ad_reg < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	lp_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA + 2);
+	if (lp_reg < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FEC_CTRL);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	if ((ad_reg & 0xc000) && (lp_reg & 0xc000))
+		ret |= 0x01;
+	else
+		ret &= ~0x01;
+
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FEC_CTRL, ret);
+
+	/* Start KR training */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	ret |= 0x01;
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, ret);
+
+	return AMD_XGBE_AN_EVENT;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_tx_xnp(struct phy_device *phydev,
+					       enum amd_xgbe_phy_rx *state)
+{
+	u16 msg;
+
+	*state = AMD_XGBE_RX_XNP;
+
+	msg = XNP_MCF_NULL_MESSAGE;
+	msg |= XNP_MP_FORMATTED;
+
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP + 2, 0);
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP + 1, 0);
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP, msg);
+
+	return AMD_XGBE_AN_EVENT;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_rx_bpa(struct phy_device *phydev,
+					       enum amd_xgbe_phy_rx *state)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	unsigned int link_support;
+	int ret, ad_reg, lp_reg;
+
+	/* Read Base Ability register 2 first */
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA + 1);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	/* Check for a supported mode, otherwise restart in a different one */
+	link_support = (priv->mode == AMD_XGBE_MODE_KR) ? 0x80 : 0x20;
+	if (!(ret & link_support))
+		return amd_xgbe_an_switch_mode(phydev);
+
+	/* Check Extended Next Page support */
+	ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
+	if (ad_reg < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	lp_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
+	if (lp_reg < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	return ((ad_reg & XNP_NP_EXCHANGE) || (lp_reg & XNP_NP_EXCHANGE)) ?
+	       amd_xgbe_an_tx_xnp(phydev, state) :
+	       amd_xgbe_an_tx_training(phydev, state);
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_rx_xnp(struct phy_device *phydev,
+					       enum amd_xgbe_phy_rx *state)
+{
+	int ad_reg, lp_reg;
+
+	/* Check Extended Next Page support */
+	ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
+	if (ad_reg < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	lp_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
+	if (lp_reg < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	return ((ad_reg & XNP_NP_EXCHANGE) || (lp_reg & XNP_NP_EXCHANGE)) ?
+	       amd_xgbe_an_tx_xnp(phydev, state) :
+	       amd_xgbe_an_tx_training(phydev, state);
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_start(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	int ret;
+
+	/* Be sure we aren't looping trying to negotiate */
+	if (priv->mode == AMD_XGBE_MODE_KR) {
+		if (priv->kr_state != AMD_XGBE_RX_READY)
+			return AMD_XGBE_AN_NO_LINK;
+		priv->kr_state = AMD_XGBE_RX_BPA;
+	} else {
+		if (priv->kx_state != AMD_XGBE_RX_READY)
+			return AMD_XGBE_AN_NO_LINK;
+		priv->kx_state = AMD_XGBE_RX_BPA;
+	}
+
+	/* Set up Advertisement register 3 first */
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	if (phydev->supported & SUPPORTED_10000baseR_FEC)
+		ret |= 0xc000;
+	else
+		ret &= ~0xc000;
+
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2, ret);
+
+	/* Set up Advertisement register 2 next */
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	if (phydev->supported & SUPPORTED_10000baseKR_Full)
+		ret |= 0x80;
+	else
+		ret &= ~0x80;
+
+	if (phydev->supported & SUPPORTED_1000baseKX_Full)
+		ret |= 0x20;
+	else
+		ret &= ~0x20;
+
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1, ret);
+
+	/* Set up Advertisement register 1 last */
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	if (phydev->supported & SUPPORTED_Pause)
+		ret |= 0x400;
+	else
+		ret &= ~0x400;
+
+	if (phydev->supported & SUPPORTED_Asym_Pause)
+		ret |= 0x800;
+	else
+		ret &= ~0x800;
+
+	/* We don't intend to perform XNP */
+	ret &= ~XNP_NP_EXCHANGE;
+
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE, ret);
+
+	/* Enable and start auto-negotiation */
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	ret |= MDIO_AN_CTRL1_ENABLE;
+	ret |= MDIO_AN_CTRL1_RESTART;
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, ret);
+
+	return AMD_XGBE_AN_EVENT;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_event(struct phy_device *phydev)
+{
+	enum amd_xgbe_phy_an new_state;
+	int ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT);
+	if (ret < 0)
+		return AMD_XGBE_AN_ERROR;
+
+	new_state = AMD_XGBE_AN_EVENT;
+	if (ret & XGBE_AN_PG_RCV)
+		new_state = AMD_XGBE_AN_PAGE_RECEIVED;
+	else if (ret & XGBE_AN_INC_LINK)
+		new_state = AMD_XGBE_AN_INCOMPAT_LINK;
+	else if (ret & XGBE_AN_INT_CMPLT)
+		new_state = AMD_XGBE_AN_COMPLETE;
+
+	if (new_state != AMD_XGBE_AN_EVENT)
+		phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
+
+	return new_state;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_page_received(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	enum amd_xgbe_phy_rx *state;
+	int ret;
+
+	state = (priv->mode == AMD_XGBE_MODE_KR) ? &priv->kr_state
+						 : &priv->kx_state;
+
+	switch (*state) {
+	case AMD_XGBE_RX_BPA:
+		ret = amd_xgbe_an_rx_bpa(phydev, state);
+		break;
+
+	case AMD_XGBE_RX_XNP:
+		ret = amd_xgbe_an_rx_xnp(phydev, state);
+		break;
+
+	default:
+		ret = AMD_XGBE_AN_ERROR;
+	}
+
+	return ret;
+}
+
+static enum amd_xgbe_phy_an amd_xgbe_an_incompat_link(struct phy_device *phydev)
+{
+	return amd_xgbe_an_switch_mode(phydev);
+}
+
+static void amd_xgbe_an_state_machine(struct work_struct *work)
+{
+	struct amd_xgbe_phy_priv *priv = container_of(work,
+						      struct amd_xgbe_phy_priv,
+						      an_work);
+	struct phy_device *phydev = priv->phydev;
+	enum amd_xgbe_phy_an cur_state;
+	int sleep;
+
+	while (1) {
+		mutex_lock(&priv->an_mutex);
+
+		cur_state = priv->an_state;
+
+		switch (priv->an_state) {
+		case AMD_XGBE_AN_START:
+			priv->an_state = amd_xgbe_an_start(phydev);
+			break;
+
+		case AMD_XGBE_AN_EVENT:
+			priv->an_state = amd_xgbe_an_event(phydev);
+			break;
+
+		case AMD_XGBE_AN_PAGE_RECEIVED:
+			priv->an_state = amd_xgbe_an_page_received(phydev);
+			break;
+
+		case AMD_XGBE_AN_INCOMPAT_LINK:
+			priv->an_state = amd_xgbe_an_incompat_link(phydev);
+			break;
+
+		case AMD_XGBE_AN_COMPLETE:
+		case AMD_XGBE_AN_NO_LINK:
+		case AMD_XGBE_AN_EXIT:
+			goto exit_unlock;
+
+		default:
+			priv->an_state = AMD_XGBE_AN_ERROR;
+		}
+
+		if (priv->an_state == AMD_XGBE_AN_ERROR) {
+			netdev_err(phydev->attached_dev,
+				   "error during auto-negotiation, state=%u\n",
+				   cur_state);
+			goto exit_unlock;
+		}
+
+		sleep = (priv->an_state == AMD_XGBE_AN_EVENT) ? 1 : 0;
+
+		mutex_unlock(&priv->an_mutex);
+
+		if (sleep)
+			usleep_range(20, 50);
+	}
+
+exit_unlock:
+	priv->an_result = priv->an_state;
+	priv->an_state = AMD_XGBE_AN_READY;
+
+	mutex_unlock(&priv->an_mutex);
+}
+
+static int amd_xgbe_phy_soft_reset(struct phy_device *phydev)
+{
+	int count, ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		return ret;
+
+	ret |= MDIO_CTRL1_RESET;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	count = 50;
+	do {
+		msleep(20);
+		ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+		if (ret < 0)
+			return ret;
+	} while ((ret & MDIO_CTRL1_RESET) && --count);
+
+	if (ret & MDIO_CTRL1_RESET)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static int amd_xgbe_phy_config_init(struct phy_device *phydev)
+{
+	/* Initialize supported features */
+	phydev->supported = SUPPORTED_Autoneg;
+	phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+	phydev->supported |= SUPPORTED_Backplane;
+	phydev->supported |= SUPPORTED_1000baseKX_Full |
+			     SUPPORTED_2500baseX_Full;
+	phydev->supported |= SUPPORTED_10000baseKR_Full |
+			     SUPPORTED_10000baseR_FEC;
+	phydev->advertising = phydev->supported;
+
+	/* Turn off and clear interrupts */
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INTMASK, 0);
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
+
+	return 0;
+}
+
+static int amd_xgbe_phy_setup_forced(struct phy_device *phydev)
+{
+	int ret;
+
+	/* Disable auto-negotiation */
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~MDIO_AN_CTRL1_ENABLE;
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, ret);
+
+	/* Validate/Set specified speed */
+	switch (phydev->speed) {
+	case SPEED_10000:
+		ret = amd_xgbe_phy_xgmii_mode(phydev);
+		break;
+
+	case SPEED_2500:
+		ret = amd_xgbe_phy_gmii_2500_mode(phydev);
+		break;
+
+	case SPEED_1000:
+		ret = amd_xgbe_phy_gmii_mode(phydev);
+		break;
+
+	default:
+		ret = -EINVAL;
+	}
+
+	if (ret < 0)
+		return ret;
+
+	/* Validate duplex mode */
+	if (phydev->duplex != DUPLEX_FULL)
+		return -EINVAL;
+
+	phydev->pause = 0;
+	phydev->asym_pause = 0;
+
+	return 0;
+}
+
+static int amd_xgbe_phy_config_aneg(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	u32 mmd_mask = phydev->c45_ids.devices_in_package;
+	int ret;
+
+	if (phydev->autoneg != AUTONEG_ENABLE)
+		return amd_xgbe_phy_setup_forced(phydev);
+
+	/* Make sure we have the AN MMD present */
+	if (!(mmd_mask & MDIO_DEVS_AN))
+		return -EINVAL;
+
+	/* Get the current speed mode */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		return ret;
+
+	/* Start/Restart the auto-negotiation state machine */
+	mutex_lock(&priv->an_mutex);
+	priv->an_result = AMD_XGBE_AN_READY;
+	priv->an_state = AMD_XGBE_AN_START;
+	priv->kr_state = AMD_XGBE_RX_READY;
+	priv->kx_state = AMD_XGBE_RX_READY;
+	mutex_unlock(&priv->an_mutex);
+
+	queue_work(priv->an_workqueue, &priv->an_work);
+
+	return 0;
+}
+
+static int amd_xgbe_phy_aneg_done(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	enum amd_xgbe_phy_an state;
+
+	mutex_lock(&priv->an_mutex);
+	state = priv->an_result;
+	mutex_unlock(&priv->an_mutex);
+
+	return (state == AMD_XGBE_AN_COMPLETE);
+}
+
+static int amd_xgbe_phy_update_link(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	enum amd_xgbe_phy_an state;
+	unsigned int check_again, autoneg;
+	int ret;
+
+	/* If we're doing auto-negotiation don't report link down */
+	mutex_lock(&priv->an_mutex);
+	state = priv->an_state;
+	mutex_unlock(&priv->an_mutex);
+
+	if (state != AMD_XGBE_AN_READY) {
+		phydev->link = 1;
+		return 0;
+	}
+
+	/* Since the device can be in the wrong mode when a link is
+	 * (re-)established (cable connected after the interface is
+	 * up, etc.), the link status may report no link. If there
+	 * is no link, try switching modes and checking the status
+	 * again.
+	 */
+	check_again = 1;
+again:
+	/* Link status is latched low, so read once to clear
+	 * and then read again to get current state
+	 */
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
+	if (ret < 0)
+		return ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
+	if (ret < 0)
+		return ret;
+
+	phydev->link = (ret & MDIO_STAT1_LSTATUS) ? 1 : 0;
+
+	if (!phydev->link) {
+		ret = amd_xgbe_phy_switch_mode(phydev);
+		if (check_again) {
+			check_again = 0;
+			goto again;
+		}
+	}
+
+	autoneg = (phydev->link && !priv->link) ? 1 : 0;
+	priv->link = phydev->link;
+	if (autoneg) {
+		/* Link is (back) up, re-start auto-negotiation */
+		ret = amd_xgbe_phy_config_aneg(phydev);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int amd_xgbe_phy_read_status(struct phy_device *phydev)
+{
+	u32 mmd_mask = phydev->c45_ids.devices_in_package;
+	int ret, mode, ad_ret, lp_ret;
+
+	ret = amd_xgbe_phy_update_link(phydev);
+	if (ret)
+		return ret;
+
+	mode = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (mode < 0)
+		return mode;
+	mode &= MDIO_PCS_CTRL2_TYPE;
+
+	if (phydev->autoneg == AUTONEG_ENABLE) {
+		if (!(mmd_mask & MDIO_DEVS_AN))
+			return -EINVAL;
+
+		if (!amd_xgbe_phy_aneg_done(phydev))
+			return 0;
+
+		/* Compare Advertisement and Link Partner register 1 */
+		ad_ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
+		if (ad_ret < 0)
+			return ad_ret;
+		lp_ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
+		if (lp_ret < 0)
+			return lp_ret;
+
+		ad_ret &= lp_ret;
+		phydev->pause = (ad_ret & 0x400) ? 1 : 0;
+		phydev->asym_pause = (ad_ret & 0x800) ? 1 : 0;
+
+		/* Compare Advertisement and Link Partner register 2 */
+		ad_ret = phy_read_mmd(phydev, MDIO_MMD_AN,
+				      MDIO_AN_ADVERTISE + 1);
+		if (ad_ret < 0)
+			return ad_ret;
+		lp_ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA + 1);
+		if (lp_ret < 0)
+			return lp_ret;
+
+		ad_ret &= lp_ret;
+		if (ad_ret & 0x80) {
+			phydev->speed = SPEED_10000;
+			if (mode != MDIO_PCS_CTRL2_10GBR) {
+				ret = amd_xgbe_phy_xgmii_mode(phydev);
+				if (ret < 0)
+					return ret;
+			}
+		} else {
+			phydev->speed = SPEED_1000;
+			if (mode == MDIO_PCS_CTRL2_10GBR) {
+				ret = amd_xgbe_phy_gmii_mode(phydev);
+				if (ret < 0)
+					return ret;
+			}
+		}
+
+		phydev->duplex = DUPLEX_FULL;
+	} else {
+		phydev->speed = (mode == MDIO_PCS_CTRL2_10GBR) ? SPEED_10000
+							       : SPEED_1000;
+		phydev->duplex = DUPLEX_FULL;
+		phydev->pause = 0;
+		phydev->asym_pause = 0;
+	}
+
+	return 0;
+}
+
+static int amd_xgbe_phy_suspend(struct phy_device *phydev)
+{
+	int ret;
+
+	mutex_lock(&phydev->lock);
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		goto unlock;
+
+	ret |= MDIO_CTRL1_LPOWER;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	ret = 0;
+
+unlock:
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+
+static int amd_xgbe_phy_resume(struct phy_device *phydev)
+{
+	int ret;
+
+	mutex_lock(&phydev->lock);
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (ret < 0)
+		goto unlock;
+
+	ret &= ~MDIO_CTRL1_LPOWER;
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
+
+	ret = 0;
+
+unlock:
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+
+static int amd_xgbe_phy_probe(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv;
+	struct platform_device *pdev;
+	struct device *dev;
+	char *wq_name;
+	int ret;
+
+	if (!phydev->dev.of_node)
+		return -EINVAL;
+
+	pdev = of_find_device_by_node(phydev->dev.of_node);
+	if (!pdev)
+		return -EINVAL;
+	dev = &pdev->dev;
+
+	wq_name = kasprintf(GFP_KERNEL, "%s-amd-xgbe-phy", phydev->bus->name);
+	if (!wq_name) {
+		ret = -ENOMEM;
+		goto err_pdev;
+	}
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		ret = -ENOMEM;
+		goto err_name;
+	}
+
+	priv->pdev = pdev;
+	priv->dev = dev;
+	priv->phydev = phydev;
+
+	/* Get the device mmio areas */
+	priv->rxtx_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->rxtx_regs = devm_ioremap_resource(dev, priv->rxtx_res);
+	if (IS_ERR(priv->rxtx_regs)) {
+		dev_err(dev, "rxtx ioremap failed\n");
+		ret = PTR_ERR(priv->rxtx_regs);
+		goto err_priv;
+	}
+
+	priv->sir0_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	priv->sir0_regs = devm_ioremap_resource(dev, priv->sir0_res);
+	if (IS_ERR(priv->sir0_regs)) {
+		dev_err(dev, "sir0 ioremap failed\n");
+		ret = PTR_ERR(priv->sir0_regs);
+		goto err_rxtx;
+	}
+
+	priv->sir1_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	priv->sir1_regs = devm_ioremap_resource(dev, priv->sir1_res);
+	if (IS_ERR(priv->sir1_regs)) {
+		dev_err(dev, "sir1 ioremap failed\n");
+		ret = PTR_ERR(priv->sir1_regs);
+		goto err_sir0;
+	}
+
+	priv->link = 1;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
+	if (ret < 0)
+		goto err_sir1;
+	if ((ret & MDIO_PCS_CTRL2_TYPE) == MDIO_PCS_CTRL2_10GBR)
+		priv->mode = AMD_XGBE_MODE_KR;
+	else
+		priv->mode = AMD_XGBE_MODE_KX;
+
+	mutex_init(&priv->an_mutex);
+	INIT_WORK(&priv->an_work, amd_xgbe_an_state_machine);
+	priv->an_workqueue = create_singlethread_workqueue(wq_name);
+	if (!priv->an_workqueue) {
+		ret = -ENOMEM;
+		goto err_sir1;
+	}
+
+	phydev->priv = priv;
+
+	kfree(wq_name);
+	of_dev_put(pdev);
+
+	return 0;
+
+err_sir1:
+	devm_iounmap(dev, priv->sir1_regs);
+	devm_release_mem_region(dev, priv->sir1_res->start,
+				resource_size(priv->sir1_res));
+
+err_sir0:
+	devm_iounmap(dev, priv->sir0_regs);
+	devm_release_mem_region(dev, priv->sir0_res->start,
+				resource_size(priv->sir0_res));
+
+err_rxtx:
+	devm_iounmap(dev, priv->rxtx_regs);
+	devm_release_mem_region(dev, priv->rxtx_res->start,
+				resource_size(priv->rxtx_res));
+
+err_priv:
+	devm_kfree(dev, priv);
+
+err_name:
+	kfree(wq_name);
+
+err_pdev:
+	of_dev_put(pdev);
+
+	return ret;
+}
+
+static void amd_xgbe_phy_remove(struct phy_device *phydev)
+{
+	struct amd_xgbe_phy_priv *priv = phydev->priv;
+	struct device *dev = priv->dev;
+
+	/* Stop any in process auto-negotiation */
+	mutex_lock(&priv->an_mutex);
+	priv->an_state = AMD_XGBE_AN_EXIT;
+	mutex_unlock(&priv->an_mutex);
+
+	flush_workqueue(priv->an_workqueue);
+	destroy_workqueue(priv->an_workqueue);
+
+	/* Release resources */
+	devm_iounmap(dev, priv->sir1_regs);
+	devm_release_mem_region(dev, priv->sir1_res->start,
+				resource_size(priv->sir1_res));
+
+	devm_iounmap(dev, priv->sir0_regs);
+	devm_release_mem_region(dev, priv->sir0_res->start,
+				resource_size(priv->sir0_res));
+
+	devm_iounmap(dev, priv->rxtx_regs);
+	devm_release_mem_region(dev, priv->rxtx_res->start,
+				resource_size(priv->rxtx_res));
+
+	devm_kfree(dev, priv);
+}
+
+static int amd_xgbe_match_phy_device(struct phy_device *phydev)
+{
+	return phydev->c45_ids.device_ids[MDIO_MMD_PCS] == XGBE_PHY_ID;
+}
+
+static struct phy_driver amd_xgbe_phy_driver[] = {
+	{
+		.phy_id			= XGBE_PHY_ID,
+		.phy_id_mask		= XGBE_PHY_MASK,
+		.name			= "AMD XGBE PHY",
+		.features		= 0,
+		.probe			= amd_xgbe_phy_probe,
+		.remove			= amd_xgbe_phy_remove,
+		.soft_reset		= amd_xgbe_phy_soft_reset,
+		.config_init		= amd_xgbe_phy_config_init,
+		.suspend		= amd_xgbe_phy_suspend,
+		.resume			= amd_xgbe_phy_resume,
+		.config_aneg		= amd_xgbe_phy_config_aneg,
+		.aneg_done		= amd_xgbe_phy_aneg_done,
+		.read_status		= amd_xgbe_phy_read_status,
+		.match_phy_device	= amd_xgbe_match_phy_device,
+		.driver			= {
+			.owner = THIS_MODULE,
+		},
+	},
+};
+
+static int __init amd_xgbe_phy_init(void)
+{
+	return phy_drivers_register(amd_xgbe_phy_driver,
+				    ARRAY_SIZE(amd_xgbe_phy_driver));
+}
+
+static void __exit amd_xgbe_phy_exit(void)
+{
+	phy_drivers_unregister(amd_xgbe_phy_driver,
+			       ARRAY_SIZE(amd_xgbe_phy_driver));
+}
+
+module_init(amd_xgbe_phy_init);
+module_exit(amd_xgbe_phy_exit);
+
+static struct mdio_device_id amd_xgbe_phy_ids[] = {
+	{ XGBE_PHY_ID, XGBE_PHY_MASK },
+	{ }
+};
+MODULE_DEVICE_TABLE(mdio, amd_xgbe_phy_ids);