drivers/net/phy/mscc.c - kernel/msm-4.19 - Gitiles

 /*
  * Driver for Microsemi VSC85xx PHYs
  *
  * Author: Nagaraju Lakkaraju
  * License: Dual MIT/GPL
  * Copyright (c) 2016 Microsemi Corporation
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mdio.h>
 #include <linux/mii.h>
 #include <linux/phy.h>
 #include <linux/of.h>
 #include <linux/netdevice.h>

 enum rgmii_rx_clock_delay {
 	RGMII_RX_CLK_DELAY_0_2_NS = 0,
 	RGMII_RX_CLK_DELAY_0_8_NS = 1,
 	RGMII_RX_CLK_DELAY_1_1_NS = 2,
 	RGMII_RX_CLK_DELAY_1_7_NS = 3,
 	RGMII_RX_CLK_DELAY_2_0_NS = 4,
 	RGMII_RX_CLK_DELAY_2_3_NS = 5,
 	RGMII_RX_CLK_DELAY_2_6_NS = 6,
 	RGMII_RX_CLK_DELAY_3_4_NS = 7
 };

 /* Microsemi VSC85xx PHY registers */
 /* IEEE 802. Std Registers */
 #define MSCC_PHY_EXT_PHY_CNTL_1           23
 #define MAC_IF_SELECTION_MASK             0x1800
 #define MAC_IF_SELECTION_GMII             0
 #define MAC_IF_SELECTION_RMII             1
 #define MAC_IF_SELECTION_RGMII            2
 #define MAC_IF_SELECTION_POS              11
 #define FAR_END_LOOPBACK_MODE_MASK        0x0008

 #define MII_VSC85XX_INT_MASK		  25
 #define MII_VSC85XX_INT_MASK_MASK	  0xa000
 #define MII_VSC85XX_INT_MASK_WOL	  0x0040
 #define MII_VSC85XX_INT_STATUS		  26

 #define MSCC_PHY_WOL_MAC_CONTROL          27
 #define EDGE_RATE_CNTL_POS                5
 #define EDGE_RATE_CNTL_MASK               0x00E0

 #define MSCC_EXT_PAGE_ACCESS		  31
 #define MSCC_PHY_PAGE_STANDARD		  0x0000 /* Standard registers */
 #define MSCC_PHY_PAGE_EXTENDED_2	  0x0002 /* Extended reg - page 2 */

 /* Extended Page 2 Registers */
 #define MSCC_PHY_RGMII_CNTL		  20
 #define RGMII_RX_CLK_DELAY_MASK		  0x0070
 #define RGMII_RX_CLK_DELAY_POS		  4

 #define MSCC_PHY_WOL_LOWER_MAC_ADDR	  21
 #define MSCC_PHY_WOL_MID_MAC_ADDR	  22
 #define MSCC_PHY_WOL_UPPER_MAC_ADDR	  23
 #define MSCC_PHY_WOL_LOWER_PASSWD	  24
 #define MSCC_PHY_WOL_MID_PASSWD		  25
 #define MSCC_PHY_WOL_UPPER_PASSWD	  26

 #define MSCC_PHY_WOL_MAC_CONTROL	  27
 #define SECURE_ON_ENABLE		  0x8000
 #define SECURE_ON_PASSWD_LEN_4		  0x4000

 /* Microsemi PHY ID's */
 #define PHY_ID_VSC8530			  0x00070560
 #define PHY_ID_VSC8531			  0x00070570
 #define PHY_ID_VSC8540			  0x00070760
 #define PHY_ID_VSC8541			  0x00070770

 #define MSCC_VDDMAC_1500		  1500
 #define MSCC_VDDMAC_1800		  1800
 #define MSCC_VDDMAC_2500		  2500
 #define MSCC_VDDMAC_3300		  3300

 struct vsc8531_private {
 	int rate_magic;
 };

 #ifdef CONFIG_OF_MDIO
 struct vsc8531_edge_rate_table {
 	u16 vddmac;
 	u8 slowdown[8];
 };

 static const struct vsc8531_edge_rate_table edge_table[] = {
 	{MSCC_VDDMAC_3300, { 0, 2,  4,  7, 10, 17, 29, 53} },
 	{MSCC_VDDMAC_2500, { 0, 3,  6, 10, 14, 23, 37, 63} },
 	{MSCC_VDDMAC_1800, { 0, 5,  9, 16, 23, 35, 52, 76} },
 	{MSCC_VDDMAC_1500, { 0, 6, 14, 21, 29, 42, 58, 77} },
 };
 #endif /* CONFIG_OF_MDIO */

 static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
 {
 	int rc;

 	rc = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, page);
 	return rc;
 }

 static int vsc85xx_wol_set(struct phy_device *phydev,
 			   struct ethtool_wolinfo *wol)
 {
 	int rc;
 	u16 reg_val;
 	u8  i;
 	u16 pwd[3] = {0, 0, 0};
 	struct ethtool_wolinfo *wol_conf = wol;
 	u8 *mac_addr = phydev->attached_dev->dev_addr;

 	mutex_lock(&phydev->lock);
 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
 	if (rc != 0)
 		goto out_unlock;

 	if (wol->wolopts & WAKE_MAGIC) {
 		/* Store the device address for the magic packet */
 		for (i = 0; i < ARRAY_SIZE(pwd); i++)
 			pwd[i] = mac_addr[5 - (i * 2 + 1)] << 8 |
 				 mac_addr[5 - i * 2];
 		phy_write(phydev, MSCC_PHY_WOL_LOWER_MAC_ADDR, pwd[0]);
 		phy_write(phydev, MSCC_PHY_WOL_MID_MAC_ADDR, pwd[1]);
 		phy_write(phydev, MSCC_PHY_WOL_UPPER_MAC_ADDR, pwd[2]);
 	} else {
 		phy_write(phydev, MSCC_PHY_WOL_LOWER_MAC_ADDR, 0);
 		phy_write(phydev, MSCC_PHY_WOL_MID_MAC_ADDR, 0);
 		phy_write(phydev, MSCC_PHY_WOL_UPPER_MAC_ADDR, 0);
 	}

 	if (wol_conf->wolopts & WAKE_MAGICSECURE) {
 		for (i = 0; i < ARRAY_SIZE(pwd); i++)
 			pwd[i] = wol_conf->sopass[5 - (i * 2 + 1)] << 8 |
 				 wol_conf->sopass[5 - i * 2];
 		phy_write(phydev, MSCC_PHY_WOL_LOWER_PASSWD, pwd[0]);
 		phy_write(phydev, MSCC_PHY_WOL_MID_PASSWD, pwd[1]);
 		phy_write(phydev, MSCC_PHY_WOL_UPPER_PASSWD, pwd[2]);
 	} else {
 		phy_write(phydev, MSCC_PHY_WOL_LOWER_PASSWD, 0);
 		phy_write(phydev, MSCC_PHY_WOL_MID_PASSWD, 0);
 		phy_write(phydev, MSCC_PHY_WOL_UPPER_PASSWD, 0);
 	}

 	reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
 	if (wol_conf->wolopts & WAKE_MAGICSECURE)
 		reg_val |= SECURE_ON_ENABLE;
 	else
 		reg_val &= ~SECURE_ON_ENABLE;
 	phy_write(phydev, MSCC_PHY_WOL_MAC_CONTROL, reg_val);

 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);
 	if (rc != 0)
 		goto out_unlock;

 	if (wol->wolopts & WAKE_MAGIC) {
 		/* Enable the WOL interrupt */
 		reg_val = phy_read(phydev, MII_VSC85XX_INT_MASK);
 		reg_val |= MII_VSC85XX_INT_MASK_WOL;
 		rc = phy_write(phydev, MII_VSC85XX_INT_MASK, reg_val);
 		if (rc != 0)
 			goto out_unlock;
 	} else {
 		/* Disable the WOL interrupt */
 		reg_val = phy_read(phydev, MII_VSC85XX_INT_MASK);
 		reg_val &= (~MII_VSC85XX_INT_MASK_WOL);
 		rc = phy_write(phydev, MII_VSC85XX_INT_MASK, reg_val);
 		if (rc != 0)
 			goto out_unlock;
 	}
 	/* Clear WOL iterrupt status */
 	reg_val = phy_read(phydev, MII_VSC85XX_INT_STATUS);

 out_unlock:
 	mutex_unlock(&phydev->lock);

 	return rc;
 }

 static void vsc85xx_wol_get(struct phy_device *phydev,
 			    struct ethtool_wolinfo *wol)
 {
 	int rc;
 	u16 reg_val;
 	u8  i;
 	u16 pwd[3] = {0, 0, 0};
 	struct ethtool_wolinfo *wol_conf = wol;

 	mutex_lock(&phydev->lock);
 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
 	if (rc != 0)
 		goto out_unlock;

 	reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
 	if (reg_val & SECURE_ON_ENABLE)
 		wol_conf->wolopts |= WAKE_MAGICSECURE;
 	if (wol_conf->wolopts & WAKE_MAGICSECURE) {
 		pwd[0] = phy_read(phydev, MSCC_PHY_WOL_LOWER_PASSWD);
 		pwd[1] = phy_read(phydev, MSCC_PHY_WOL_MID_PASSWD);
 		pwd[2] = phy_read(phydev, MSCC_PHY_WOL_UPPER_PASSWD);
 		for (i = 0; i < ARRAY_SIZE(pwd); i++) {
 			wol_conf->sopass[5 - i * 2] = pwd[i] & 0x00ff;
 			wol_conf->sopass[5 - (i * 2 + 1)] = (pwd[i] & 0xff00)
 							    >> 8;
 		}
 	}

 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);

 out_unlock:
 	mutex_unlock(&phydev->lock);
 }

 #ifdef CONFIG_OF_MDIO
 static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
 {
 	u8 sd;
 	u16 vdd;
 	int rc, i, j;
 	struct device *dev = &phydev->mdio.dev;
 	struct device_node *of_node = dev->of_node;
 	u8 sd_array_size = ARRAY_SIZE(edge_table[0].slowdown);

 	if (!of_node)
 		return -ENODEV;

 	rc = of_property_read_u16(of_node, "vsc8531,vddmac", &vdd);
 	if (rc != 0)
 		vdd = MSCC_VDDMAC_3300;

 	rc = of_property_read_u8(of_node, "vsc8531,edge-slowdown", &sd);
 	if (rc != 0)
 		sd = 0;

 	for (i = 0; i < ARRAY_SIZE(edge_table); i++)
 		if (edge_table[i].vddmac == vdd)
 			for (j = 0; j < sd_array_size; j++)
 				if (edge_table[i].slowdown[j] == sd)
 					return (sd_array_size - j - 1);

 	return -EINVAL;
 }
 #else
 static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
 {
 	return 0;
 }
 #endif /* CONFIG_OF_MDIO */

 static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
 {
 	int rc;
 	u16 reg_val;

 	mutex_lock(&phydev->lock);
 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
 	if (rc != 0)
 		goto out_unlock;
 	reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
 	reg_val &= ~(EDGE_RATE_CNTL_MASK);
 	reg_val |= (edge_rate << EDGE_RATE_CNTL_POS);
 	rc = phy_write(phydev, MSCC_PHY_WOL_MAC_CONTROL, reg_val);
 	if (rc != 0)
 		goto out_unlock;
 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);

 out_unlock:
 	mutex_unlock(&phydev->lock);

 	return rc;
 }

 static int vsc85xx_mac_if_set(struct phy_device *phydev,
 			      phy_interface_t interface)
 {
 	int rc;
 	u16 reg_val;

 	mutex_lock(&phydev->lock);
 	reg_val = phy_read(phydev, MSCC_PHY_EXT_PHY_CNTL_1);
 	reg_val &= ~(MAC_IF_SELECTION_MASK);
 	switch (interface) {
 	case PHY_INTERFACE_MODE_RGMII:
 		reg_val |= (MAC_IF_SELECTION_RGMII << MAC_IF_SELECTION_POS);
 		break;
 	case PHY_INTERFACE_MODE_RMII:
 		reg_val |= (MAC_IF_SELECTION_RMII << MAC_IF_SELECTION_POS);
 		break;
 	case PHY_INTERFACE_MODE_MII:
 	case PHY_INTERFACE_MODE_GMII:
 		reg_val |= (MAC_IF_SELECTION_GMII << MAC_IF_SELECTION_POS);
 		break;
 	default:
 		rc = -EINVAL;
 		goto out_unlock;
 	}
 	rc = phy_write(phydev, MSCC_PHY_EXT_PHY_CNTL_1, reg_val);
 	if (rc != 0)
 		goto out_unlock;

 	rc = genphy_soft_reset(phydev);

 out_unlock:
 	mutex_unlock(&phydev->lock);

 	return rc;
 }

 static int vsc85xx_default_config(struct phy_device *phydev)
 {
 	int rc;
 	u16 reg_val;

 	mutex_lock(&phydev->lock);
 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
 	if (rc != 0)
 		goto out_unlock;

 	reg_val = phy_read(phydev, MSCC_PHY_RGMII_CNTL);
 	reg_val &= ~(RGMII_RX_CLK_DELAY_MASK);
 	reg_val |= (RGMII_RX_CLK_DELAY_1_1_NS << RGMII_RX_CLK_DELAY_POS);
 	phy_write(phydev, MSCC_PHY_RGMII_CNTL, reg_val);
 	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);

 out_unlock:
 	mutex_unlock(&phydev->lock);

 	return rc;
 }

 static int vsc85xx_config_init(struct phy_device *phydev)
 {
 	int rc;
 	struct vsc8531_private *vsc8531 = phydev->priv;

 	rc = vsc85xx_default_config(phydev);
 	if (rc)
 		return rc;

 	rc = vsc85xx_mac_if_set(phydev, phydev->interface);
 	if (rc)
 		return rc;

 	rc = vsc85xx_edge_rate_cntl_set(phydev, vsc8531->rate_magic);
 	if (rc)
 		return rc;

 	rc = genphy_config_init(phydev);

 	return rc;
 }

 static int vsc85xx_ack_interrupt(struct phy_device *phydev)
 {
 	int rc = 0;

 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
 		rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);

 	return (rc < 0) ? rc : 0;
 }

 static int vsc85xx_config_intr(struct phy_device *phydev)
 {
 	int rc;

 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
 		rc = phy_write(phydev, MII_VSC85XX_INT_MASK,
 			       MII_VSC85XX_INT_MASK_MASK);
 	} else {
 		rc = phy_write(phydev, MII_VSC85XX_INT_MASK, 0);
 		if (rc < 0)
 			return rc;
 		rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);
 	}

 	return rc;
 }

 static int vsc85xx_probe(struct phy_device *phydev)
 {
 	int rate_magic;
 	struct vsc8531_private *vsc8531;

 	rate_magic = vsc85xx_edge_rate_magic_get(phydev);
 	if (rate_magic < 0)
 		return rate_magic;

 	vsc8531 = devm_kzalloc(&phydev->mdio.dev, sizeof(*vsc8531), GFP_KERNEL);
 	if (!vsc8531)
 		return -ENOMEM;

 	phydev->priv = vsc8531;

 	vsc8531->rate_magic = rate_magic;

 	return 0;
 }

 /* Microsemi VSC85xx PHYs */
 static struct phy_driver vsc85xx_driver[] = {
 {
 	.phy_id		= PHY_ID_VSC8530,
 	.name		= "Microsemi FE VSC8530",
 	.phy_id_mask	= 0xfffffff0,
 	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT,
 	.soft_reset	= &genphy_soft_reset,
 	.config_init	= &vsc85xx_config_init,
 	.config_aneg	= &genphy_config_aneg,
 	.aneg_done	= &genphy_aneg_done,
 	.read_status	= &genphy_read_status,
 	.ack_interrupt	= &vsc85xx_ack_interrupt,
 	.config_intr	= &vsc85xx_config_intr,
 	.suspend	= &genphy_suspend,
 	.resume		= &genphy_resume,
 	.probe		= &vsc85xx_probe,
 	.set_wol	= &vsc85xx_wol_set,
 	.get_wol	= &vsc85xx_wol_get,
 },
 {
 	.phy_id		= PHY_ID_VSC8531,
 	.name		= "Microsemi VSC8531",
 	.phy_id_mask    = 0xfffffff0,
 	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT,
 	.soft_reset	= &genphy_soft_reset,
 	.config_init    = &vsc85xx_config_init,
 	.config_aneg    = &genphy_config_aneg,
 	.aneg_done	= &genphy_aneg_done,
 	.read_status    = &genphy_read_status,
 	.ack_interrupt  = &vsc85xx_ack_interrupt,
 	.config_intr    = &vsc85xx_config_intr,
 	.suspend	= &genphy_suspend,
 	.resume		= &genphy_resume,
 	.probe		= &vsc85xx_probe,
 	.set_wol	= &vsc85xx_wol_set,
 	.get_wol	= &vsc85xx_wol_get,
 },
 {
 	.phy_id		= PHY_ID_VSC8540,
 	.name		= "Microsemi FE VSC8540 SyncE",
 	.phy_id_mask	= 0xfffffff0,
 	.features	= PHY_BASIC_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT,
 	.soft_reset	= &genphy_soft_reset,
 	.config_init	= &vsc85xx_config_init,
 	.config_aneg	= &genphy_config_aneg,
 	.aneg_done	= &genphy_aneg_done,
 	.read_status	= &genphy_read_status,
 	.ack_interrupt	= &vsc85xx_ack_interrupt,
 	.config_intr	= &vsc85xx_config_intr,
 	.suspend	= &genphy_suspend,
 	.resume		= &genphy_resume,
 	.probe		= &vsc85xx_probe,
 	.set_wol	= &vsc85xx_wol_set,
 	.get_wol	= &vsc85xx_wol_get,
 },
 {
 	.phy_id		= PHY_ID_VSC8541,
 	.name		= "Microsemi VSC8541 SyncE",
 	.phy_id_mask    = 0xfffffff0,
 	.features	= PHY_GBIT_FEATURES,
 	.flags		= PHY_HAS_INTERRUPT,
 	.soft_reset	= &genphy_soft_reset,
 	.config_init    = &vsc85xx_config_init,
 	.config_aneg    = &genphy_config_aneg,
 	.aneg_done	= &genphy_aneg_done,
 	.read_status    = &genphy_read_status,
 	.ack_interrupt  = &vsc85xx_ack_interrupt,
 	.config_intr    = &vsc85xx_config_intr,
 	.suspend	= &genphy_suspend,
 	.resume		= &genphy_resume,
 	.probe		= &vsc85xx_probe,
 	.set_wol	= &vsc85xx_wol_set,
 	.get_wol	= &vsc85xx_wol_get,
 }

 };

 module_phy_driver(vsc85xx_driver);

 static struct mdio_device_id __maybe_unused vsc85xx_tbl[] = {
 	{ PHY_ID_VSC8530, 0xfffffff0, },
 	{ PHY_ID_VSC8531, 0xfffffff0, },
 	{ PHY_ID_VSC8540, 0xfffffff0, },
 	{ PHY_ID_VSC8541, 0xfffffff0, },
 	{ }
 };

 MODULE_DEVICE_TABLE(mdio, vsc85xx_tbl);

 MODULE_DESCRIPTION("Microsemi VSC85xx PHY driver");
 MODULE_AUTHOR("Nagaraju Lakkaraju");
 MODULE_LICENSE("Dual MIT/GPL");
	/*
	* Driver for Microsemi VSC85xx PHYs
	*
	* Author: Nagaraju Lakkaraju
	* License: Dual MIT/GPL
	* Copyright (c) 2016 Microsemi Corporation
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/mdio.h>
	#include <linux/mii.h>
	#include <linux/phy.h>
	#include <linux/of.h>
	#include <linux/netdevice.h>

	enum rgmii_rx_clock_delay {
	RGMII_RX_CLK_DELAY_0_2_NS = 0,
	RGMII_RX_CLK_DELAY_0_8_NS = 1,
	RGMII_RX_CLK_DELAY_1_1_NS = 2,
	RGMII_RX_CLK_DELAY_1_7_NS = 3,
	RGMII_RX_CLK_DELAY_2_0_NS = 4,
	RGMII_RX_CLK_DELAY_2_3_NS = 5,
	RGMII_RX_CLK_DELAY_2_6_NS = 6,
	RGMII_RX_CLK_DELAY_3_4_NS = 7
	};

	/* Microsemi VSC85xx PHY registers */
	/* IEEE 802. Std Registers */
	#define MSCC_PHY_EXT_PHY_CNTL_1 23
	#define MAC_IF_SELECTION_MASK 0x1800
	#define MAC_IF_SELECTION_GMII 0
	#define MAC_IF_SELECTION_RMII 1
	#define MAC_IF_SELECTION_RGMII 2
	#define MAC_IF_SELECTION_POS 11
	#define FAR_END_LOOPBACK_MODE_MASK 0x0008

	#define MII_VSC85XX_INT_MASK 25
	#define MII_VSC85XX_INT_MASK_MASK 0xa000
	#define MII_VSC85XX_INT_MASK_WOL 0x0040
	#define MII_VSC85XX_INT_STATUS 26

	#define MSCC_PHY_WOL_MAC_CONTROL 27
	#define EDGE_RATE_CNTL_POS 5
	#define EDGE_RATE_CNTL_MASK 0x00E0

	#define MSCC_EXT_PAGE_ACCESS 31
	#define MSCC_PHY_PAGE_STANDARD 0x0000 /* Standard registers */
	#define MSCC_PHY_PAGE_EXTENDED_2 0x0002 /* Extended reg - page 2 */

	/* Extended Page 2 Registers */
	#define MSCC_PHY_RGMII_CNTL 20
	#define RGMII_RX_CLK_DELAY_MASK 0x0070
	#define RGMII_RX_CLK_DELAY_POS 4

	#define MSCC_PHY_WOL_LOWER_MAC_ADDR 21
	#define MSCC_PHY_WOL_MID_MAC_ADDR 22
	#define MSCC_PHY_WOL_UPPER_MAC_ADDR 23
	#define MSCC_PHY_WOL_LOWER_PASSWD 24
	#define MSCC_PHY_WOL_MID_PASSWD 25
	#define MSCC_PHY_WOL_UPPER_PASSWD 26

	#define MSCC_PHY_WOL_MAC_CONTROL 27
	#define SECURE_ON_ENABLE 0x8000
	#define SECURE_ON_PASSWD_LEN_4 0x4000

	/* Microsemi PHY ID's */
	#define PHY_ID_VSC8530 0x00070560
	#define PHY_ID_VSC8531 0x00070570
	#define PHY_ID_VSC8540 0x00070760
	#define PHY_ID_VSC8541 0x00070770

	#define MSCC_VDDMAC_1500 1500
	#define MSCC_VDDMAC_1800 1800
	#define MSCC_VDDMAC_2500 2500
	#define MSCC_VDDMAC_3300 3300

	struct vsc8531_private {
	int rate_magic;
	};

	#ifdef CONFIG_OF_MDIO
	struct vsc8531_edge_rate_table {
	u16 vddmac;
	u8 slowdown[8];
	};

	static const struct vsc8531_edge_rate_table edge_table[] = {
	{MSCC_VDDMAC_3300, { 0, 2, 4, 7, 10, 17, 29, 53} },
	{MSCC_VDDMAC_2500, { 0, 3, 6, 10, 14, 23, 37, 63} },
	{MSCC_VDDMAC_1800, { 0, 5, 9, 16, 23, 35, 52, 76} },
	{MSCC_VDDMAC_1500, { 0, 6, 14, 21, 29, 42, 58, 77} },
	};
	#endif /* CONFIG_OF_MDIO */

	static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
	{
	int rc;

	rc = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, page);
	return rc;
	}

	static int vsc85xx_wol_set(struct phy_device *phydev,
	struct ethtool_wolinfo *wol)
	{
	int rc;
	u16 reg_val;
	u8 i;
	u16 pwd[3] = {0, 0, 0};
	struct ethtool_wolinfo *wol_conf = wol;
	u8 *mac_addr = phydev->attached_dev->dev_addr;

	mutex_lock(&phydev->lock);
	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
	if (rc != 0)
	goto out_unlock;

	if (wol->wolopts & WAKE_MAGIC) {
	/* Store the device address for the magic packet */
	for (i = 0; i < ARRAY_SIZE(pwd); i++)
	pwd[i] = mac_addr[5 - (i * 2 + 1)] << 8 \|
	mac_addr[5 - i * 2];
	phy_write(phydev, MSCC_PHY_WOL_LOWER_MAC_ADDR, pwd[0]);
	phy_write(phydev, MSCC_PHY_WOL_MID_MAC_ADDR, pwd[1]);
	phy_write(phydev, MSCC_PHY_WOL_UPPER_MAC_ADDR, pwd[2]);
	} else {
	phy_write(phydev, MSCC_PHY_WOL_LOWER_MAC_ADDR, 0);
	phy_write(phydev, MSCC_PHY_WOL_MID_MAC_ADDR, 0);
	phy_write(phydev, MSCC_PHY_WOL_UPPER_MAC_ADDR, 0);
	}

	if (wol_conf->wolopts & WAKE_MAGICSECURE) {
	for (i = 0; i < ARRAY_SIZE(pwd); i++)
	pwd[i] = wol_conf->sopass[5 - (i * 2 + 1)] << 8 \|
	wol_conf->sopass[5 - i * 2];
	phy_write(phydev, MSCC_PHY_WOL_LOWER_PASSWD, pwd[0]);
	phy_write(phydev, MSCC_PHY_WOL_MID_PASSWD, pwd[1]);
	phy_write(phydev, MSCC_PHY_WOL_UPPER_PASSWD, pwd[2]);
	} else {
	phy_write(phydev, MSCC_PHY_WOL_LOWER_PASSWD, 0);
	phy_write(phydev, MSCC_PHY_WOL_MID_PASSWD, 0);
	phy_write(phydev, MSCC_PHY_WOL_UPPER_PASSWD, 0);
	}

	reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
	if (wol_conf->wolopts & WAKE_MAGICSECURE)
	reg_val \|= SECURE_ON_ENABLE;
	else
	reg_val &= ~SECURE_ON_ENABLE;
	phy_write(phydev, MSCC_PHY_WOL_MAC_CONTROL, reg_val);

	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);
	if (rc != 0)
	goto out_unlock;

	if (wol->wolopts & WAKE_MAGIC) {
	/* Enable the WOL interrupt */
	reg_val = phy_read(phydev, MII_VSC85XX_INT_MASK);
	reg_val \|= MII_VSC85XX_INT_MASK_WOL;
	rc = phy_write(phydev, MII_VSC85XX_INT_MASK, reg_val);
	if (rc != 0)
	goto out_unlock;
	} else {
	/* Disable the WOL interrupt */
	reg_val = phy_read(phydev, MII_VSC85XX_INT_MASK);
	reg_val &= (~MII_VSC85XX_INT_MASK_WOL);
	rc = phy_write(phydev, MII_VSC85XX_INT_MASK, reg_val);
	if (rc != 0)
	goto out_unlock;
	}
	/* Clear WOL iterrupt status */
	reg_val = phy_read(phydev, MII_VSC85XX_INT_STATUS);

	out_unlock:
	mutex_unlock(&phydev->lock);

	return rc;
	}

	static void vsc85xx_wol_get(struct phy_device *phydev,
	struct ethtool_wolinfo *wol)
	{
	int rc;
	u16 reg_val;
	u8 i;
	u16 pwd[3] = {0, 0, 0};
	struct ethtool_wolinfo *wol_conf = wol;

	mutex_lock(&phydev->lock);
	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
	if (rc != 0)
	goto out_unlock;

	reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
	if (reg_val & SECURE_ON_ENABLE)
	wol_conf->wolopts \|= WAKE_MAGICSECURE;
	if (wol_conf->wolopts & WAKE_MAGICSECURE) {
	pwd[0] = phy_read(phydev, MSCC_PHY_WOL_LOWER_PASSWD);
	pwd[1] = phy_read(phydev, MSCC_PHY_WOL_MID_PASSWD);
	pwd[2] = phy_read(phydev, MSCC_PHY_WOL_UPPER_PASSWD);
	for (i = 0; i < ARRAY_SIZE(pwd); i++) {
	wol_conf->sopass[5 - i * 2] = pwd[i] & 0x00ff;
	wol_conf->sopass[5 - (i * 2 + 1)] = (pwd[i] & 0xff00)
	>> 8;
	}
	}

	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);

	out_unlock:
	mutex_unlock(&phydev->lock);
	}

	#ifdef CONFIG_OF_MDIO
	static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
	{
	u8 sd;
	u16 vdd;
	int rc, i, j;
	struct device *dev = &phydev->mdio.dev;
	struct device_node *of_node = dev->of_node;
	u8 sd_array_size = ARRAY_SIZE(edge_table[0].slowdown);

	if (!of_node)
	return -ENODEV;

	rc = of_property_read_u16(of_node, "vsc8531,vddmac", &vdd);
	if (rc != 0)
	vdd = MSCC_VDDMAC_3300;

	rc = of_property_read_u8(of_node, "vsc8531,edge-slowdown", &sd);
	if (rc != 0)
	sd = 0;

	for (i = 0; i < ARRAY_SIZE(edge_table); i++)
	if (edge_table[i].vddmac == vdd)
	for (j = 0; j < sd_array_size; j++)
	if (edge_table[i].slowdown[j] == sd)
	return (sd_array_size - j - 1);

	return -EINVAL;
	}
	#else
	static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
	{
	return 0;
	}
	#endif /* CONFIG_OF_MDIO */

	static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
	{
	int rc;
	u16 reg_val;

	mutex_lock(&phydev->lock);
	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
	if (rc != 0)
	goto out_unlock;
	reg_val = phy_read(phydev, MSCC_PHY_WOL_MAC_CONTROL);
	reg_val &= ~(EDGE_RATE_CNTL_MASK);
	reg_val \|= (edge_rate << EDGE_RATE_CNTL_POS);
	rc = phy_write(phydev, MSCC_PHY_WOL_MAC_CONTROL, reg_val);
	if (rc != 0)
	goto out_unlock;
	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);

	out_unlock:
	mutex_unlock(&phydev->lock);

	return rc;
	}

	static int vsc85xx_mac_if_set(struct phy_device *phydev,
	phy_interface_t interface)
	{
	int rc;
	u16 reg_val;

	mutex_lock(&phydev->lock);
	reg_val = phy_read(phydev, MSCC_PHY_EXT_PHY_CNTL_1);
	reg_val &= ~(MAC_IF_SELECTION_MASK);
	switch (interface) {
	case PHY_INTERFACE_MODE_RGMII:
	reg_val \|= (MAC_IF_SELECTION_RGMII << MAC_IF_SELECTION_POS);
	break;
	case PHY_INTERFACE_MODE_RMII:
	reg_val \|= (MAC_IF_SELECTION_RMII << MAC_IF_SELECTION_POS);
	break;
	case PHY_INTERFACE_MODE_MII:
	case PHY_INTERFACE_MODE_GMII:
	reg_val \|= (MAC_IF_SELECTION_GMII << MAC_IF_SELECTION_POS);
	break;
	default:
	rc = -EINVAL;
	goto out_unlock;
	}
	rc = phy_write(phydev, MSCC_PHY_EXT_PHY_CNTL_1, reg_val);
	if (rc != 0)
	goto out_unlock;

	rc = genphy_soft_reset(phydev);

	out_unlock:
	mutex_unlock(&phydev->lock);

	return rc;
	}

	static int vsc85xx_default_config(struct phy_device *phydev)
	{
	int rc;
	u16 reg_val;

	mutex_lock(&phydev->lock);
	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_EXTENDED_2);
	if (rc != 0)
	goto out_unlock;

	reg_val = phy_read(phydev, MSCC_PHY_RGMII_CNTL);
	reg_val &= ~(RGMII_RX_CLK_DELAY_MASK);
	reg_val \|= (RGMII_RX_CLK_DELAY_1_1_NS << RGMII_RX_CLK_DELAY_POS);
	phy_write(phydev, MSCC_PHY_RGMII_CNTL, reg_val);
	rc = vsc85xx_phy_page_set(phydev, MSCC_PHY_PAGE_STANDARD);

	out_unlock:
	mutex_unlock(&phydev->lock);

	return rc;
	}

	static int vsc85xx_config_init(struct phy_device *phydev)
	{
	int rc;
	struct vsc8531_private *vsc8531 = phydev->priv;

	rc = vsc85xx_default_config(phydev);
	if (rc)
	return rc;

	rc = vsc85xx_mac_if_set(phydev, phydev->interface);
	if (rc)
	return rc;

	rc = vsc85xx_edge_rate_cntl_set(phydev, vsc8531->rate_magic);
	if (rc)
	return rc;

	rc = genphy_config_init(phydev);

	return rc;
	}

	static int vsc85xx_ack_interrupt(struct phy_device *phydev)
	{
	int rc = 0;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
	rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);

	return (rc < 0) ? rc : 0;
	}

	static int vsc85xx_config_intr(struct phy_device *phydev)
	{
	int rc;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
	rc = phy_write(phydev, MII_VSC85XX_INT_MASK,
	MII_VSC85XX_INT_MASK_MASK);
	} else {
	rc = phy_write(phydev, MII_VSC85XX_INT_MASK, 0);
	if (rc < 0)
	return rc;
	rc = phy_read(phydev, MII_VSC85XX_INT_STATUS);
	}

	return rc;
	}

	static int vsc85xx_probe(struct phy_device *phydev)
	{
	int rate_magic;
	struct vsc8531_private *vsc8531;

	rate_magic = vsc85xx_edge_rate_magic_get(phydev);
	if (rate_magic < 0)
	return rate_magic;

	vsc8531 = devm_kzalloc(&phydev->mdio.dev, sizeof(*vsc8531), GFP_KERNEL);
	if (!vsc8531)
	return -ENOMEM;

	phydev->priv = vsc8531;

	vsc8531->rate_magic = rate_magic;

	return 0;
	}

	/* Microsemi VSC85xx PHYs */
	static struct phy_driver vsc85xx_driver[] = {
	{
	.phy_id = PHY_ID_VSC8530,
	.name = "Microsemi FE VSC8530",
	.phy_id_mask = 0xfffffff0,
	.features = PHY_BASIC_FEATURES,
	.flags = PHY_HAS_INTERRUPT,
	.soft_reset = &genphy_soft_reset,
	.config_init = &vsc85xx_config_init,
	.config_aneg = &genphy_config_aneg,
	.aneg_done = &genphy_aneg_done,
	.read_status = &genphy_read_status,
	.ack_interrupt = &vsc85xx_ack_interrupt,
	.config_intr = &vsc85xx_config_intr,
	.suspend = &genphy_suspend,
	.resume = &genphy_resume,
	.probe = &vsc85xx_probe,
	.set_wol = &vsc85xx_wol_set,
	.get_wol = &vsc85xx_wol_get,
	},
	{
	.phy_id = PHY_ID_VSC8531,
	.name = "Microsemi VSC8531",
	.phy_id_mask = 0xfffffff0,
	.features = PHY_GBIT_FEATURES,
	.flags = PHY_HAS_INTERRUPT,
	.soft_reset = &genphy_soft_reset,
	.config_init = &vsc85xx_config_init,
	.config_aneg = &genphy_config_aneg,
	.aneg_done = &genphy_aneg_done,
	.read_status = &genphy_read_status,
	.ack_interrupt = &vsc85xx_ack_interrupt,
	.config_intr = &vsc85xx_config_intr,
	.suspend = &genphy_suspend,
	.resume = &genphy_resume,
	.probe = &vsc85xx_probe,
	.set_wol = &vsc85xx_wol_set,
	.get_wol = &vsc85xx_wol_get,
	},
	{
	.phy_id = PHY_ID_VSC8540,
	.name = "Microsemi FE VSC8540 SyncE",
	.phy_id_mask = 0xfffffff0,
	.features = PHY_BASIC_FEATURES,
	.flags = PHY_HAS_INTERRUPT,
	.soft_reset = &genphy_soft_reset,
	.config_init = &vsc85xx_config_init,
	.config_aneg = &genphy_config_aneg,
	.aneg_done = &genphy_aneg_done,
	.read_status = &genphy_read_status,
	.ack_interrupt = &vsc85xx_ack_interrupt,
	.config_intr = &vsc85xx_config_intr,
	.suspend = &genphy_suspend,
	.resume = &genphy_resume,
	.probe = &vsc85xx_probe,
	.set_wol = &vsc85xx_wol_set,
	.get_wol = &vsc85xx_wol_get,
	},
	{
	.phy_id = PHY_ID_VSC8541,
	.name = "Microsemi VSC8541 SyncE",
	.phy_id_mask = 0xfffffff0,
	.features = PHY_GBIT_FEATURES,
	.flags = PHY_HAS_INTERRUPT,
	.soft_reset = &genphy_soft_reset,
	.config_init = &vsc85xx_config_init,
	.config_aneg = &genphy_config_aneg,
	.aneg_done = &genphy_aneg_done,
	.read_status = &genphy_read_status,
	.ack_interrupt = &vsc85xx_ack_interrupt,
	.config_intr = &vsc85xx_config_intr,
	.suspend = &genphy_suspend,
	.resume = &genphy_resume,
	.probe = &vsc85xx_probe,
	.set_wol = &vsc85xx_wol_set,
	.get_wol = &vsc85xx_wol_get,
	}

	};

	module_phy_driver(vsc85xx_driver);

	static struct mdio_device_id __maybe_unused vsc85xx_tbl[] = {
	{ PHY_ID_VSC8530, 0xfffffff0, },
	{ PHY_ID_VSC8531, 0xfffffff0, },
	{ PHY_ID_VSC8540, 0xfffffff0, },
	{ PHY_ID_VSC8541, 0xfffffff0, },
	{ }
	};

	MODULE_DEVICE_TABLE(mdio, vsc85xx_tbl);

	MODULE_DESCRIPTION("Microsemi VSC85xx PHY driver");
	MODULE_AUTHOR("Nagaraju Lakkaraju");
	MODULE_LICENSE("Dual MIT/GPL");