drivers/net/ethernet/stmicro/stmmac/altr_tse_pcs.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright Altera Corporation (C) 2016. All rights reserved.
  *
  * Author: Tien Hock Loh <thloh@altera.com>
  */

 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_net.h>
 #include <linux/phy.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <linux/stmmac.h>

 #include "stmmac.h"
 #include "stmmac_platform.h"
 #include "altr_tse_pcs.h"

 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII	0
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII		BIT(1)
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII		BIT(2)
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH		2
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK			GENMASK(1, 0)

 #define TSE_PCS_CONTROL_AN_EN_MASK			BIT(12)
 #define TSE_PCS_CONTROL_REG				0x00
 #define TSE_PCS_CONTROL_RESTART_AN_MASK			BIT(9)
 #define TSE_PCS_CTRL_AUTONEG_SGMII			0x1140
 #define TSE_PCS_IF_MODE_REG				0x28
 #define TSE_PCS_LINK_TIMER_0_REG			0x24
 #define TSE_PCS_LINK_TIMER_1_REG			0x26
 #define TSE_PCS_SIZE					0x40
 #define TSE_PCS_STATUS_AN_COMPLETED_MASK		BIT(5)
 #define TSE_PCS_STATUS_LINK_MASK			0x0004
 #define TSE_PCS_STATUS_REG				0x02
 #define TSE_PCS_SGMII_SPEED_1000			BIT(3)
 #define TSE_PCS_SGMII_SPEED_100				BIT(2)
 #define TSE_PCS_SGMII_SPEED_10				0x0
 #define TSE_PCS_SW_RST_MASK				0x8000
 #define TSE_PCS_PARTNER_ABILITY_REG			0x0A
 #define TSE_PCS_PARTNER_DUPLEX_FULL			0x1000
 #define TSE_PCS_PARTNER_DUPLEX_HALF			0x0000
 #define TSE_PCS_PARTNER_DUPLEX_MASK			0x1000
 #define TSE_PCS_PARTNER_SPEED_MASK			GENMASK(11, 10)
 #define TSE_PCS_PARTNER_SPEED_1000			BIT(11)
 #define TSE_PCS_PARTNER_SPEED_100			BIT(10)
 #define TSE_PCS_PARTNER_SPEED_10			0x0000
 #define TSE_PCS_PARTNER_SPEED_1000			BIT(11)
 #define TSE_PCS_PARTNER_SPEED_100			BIT(10)
 #define TSE_PCS_PARTNER_SPEED_10			0x0000
 #define TSE_PCS_SGMII_SPEED_MASK			GENMASK(3, 2)
 #define TSE_PCS_SGMII_LINK_TIMER_0			0x0D40
 #define TSE_PCS_SGMII_LINK_TIMER_1			0x0003
 #define TSE_PCS_SW_RESET_TIMEOUT			100
 #define TSE_PCS_USE_SGMII_AN_MASK			BIT(1)
 #define TSE_PCS_USE_SGMII_ENA				BIT(0)
 #define TSE_PCS_IF_USE_SGMII				0x03

 #define SGMII_ADAPTER_CTRL_REG				0x00
 #define SGMII_ADAPTER_DISABLE				0x0001
 #define SGMII_ADAPTER_ENABLE				0x0000

 #define AUTONEGO_LINK_TIMER				20

 static int tse_pcs_reset(void __iomem *base, struct tse_pcs *pcs)
 {
 	int counter = 0;
 	u16 val;

 	val = readw(base + TSE_PCS_CONTROL_REG);
 	val |= TSE_PCS_SW_RST_MASK;
 	writew(val, base + TSE_PCS_CONTROL_REG);

 	while (counter < TSE_PCS_SW_RESET_TIMEOUT) {
 		val = readw(base + TSE_PCS_CONTROL_REG);
 		val &= TSE_PCS_SW_RST_MASK;
 		if (val == 0)
 			break;
 		counter++;
 		udelay(1);
 	}
 	if (counter >= TSE_PCS_SW_RESET_TIMEOUT) {
 		dev_err(pcs->dev, "PCS could not get out of sw reset\n");
 		return -ETIMEDOUT;
 	}

 	return 0;
 }

 int tse_pcs_init(void __iomem *base, struct tse_pcs *pcs)
 {
 	int ret = 0;

 	writew(TSE_PCS_IF_USE_SGMII, base + TSE_PCS_IF_MODE_REG);

 	writew(TSE_PCS_CTRL_AUTONEG_SGMII, base + TSE_PCS_CONTROL_REG);

 	writew(TSE_PCS_SGMII_LINK_TIMER_0, base + TSE_PCS_LINK_TIMER_0_REG);
 	writew(TSE_PCS_SGMII_LINK_TIMER_1, base + TSE_PCS_LINK_TIMER_1_REG);

 	ret = tse_pcs_reset(base, pcs);
 	if (ret == 0)
 		writew(SGMII_ADAPTER_ENABLE,
 		       pcs->sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);

 	return ret;
 }

 static void pcs_link_timer_callback(struct tse_pcs *pcs)
 {
 	u16 val = 0;
 	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
 	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;

 	val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
 	val &= TSE_PCS_STATUS_LINK_MASK;

 	if (val != 0) {
 		dev_dbg(pcs->dev, "Adapter: Link is established\n");
 		writew(SGMII_ADAPTER_ENABLE,
 		       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
 	} else {
 		mod_timer(&pcs->aneg_link_timer, jiffies +
 			  msecs_to_jiffies(AUTONEGO_LINK_TIMER));
 	}
 }

 static void auto_nego_timer_callback(struct tse_pcs *pcs)
 {
 	u16 val = 0;
 	u16 speed = 0;
 	u16 duplex = 0;
 	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
 	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;

 	val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
 	val &= TSE_PCS_STATUS_AN_COMPLETED_MASK;

 	if (val != 0) {
 		dev_dbg(pcs->dev, "Adapter: Auto Negotiation is completed\n");
 		val = readw(tse_pcs_base + TSE_PCS_PARTNER_ABILITY_REG);
 		speed = val & TSE_PCS_PARTNER_SPEED_MASK;
 		duplex = val & TSE_PCS_PARTNER_DUPLEX_MASK;

 		if (speed == TSE_PCS_PARTNER_SPEED_10 &&
 		    duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
 			dev_dbg(pcs->dev,
 				"Adapter: Link Partner is Up - 10/Full\n");
 		else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
 			 duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
 			dev_dbg(pcs->dev,
 				"Adapter: Link Partner is Up - 100/Full\n");
 		else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
 			 duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
 			dev_dbg(pcs->dev,
 				"Adapter: Link Partner is Up - 1000/Full\n");
 		else if (speed == TSE_PCS_PARTNER_SPEED_10 &&
 			 duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
 			dev_err(pcs->dev,
 				"Adapter does not support Half Duplex\n");
 		else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
 			 duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
 			dev_err(pcs->dev,
 				"Adapter does not support Half Duplex\n");
 		else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
 			 duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
 			dev_err(pcs->dev,
 				"Adapter does not support Half Duplex\n");
 		else
 			dev_err(pcs->dev,
 				"Adapter: Invalid Partner Speed and Duplex\n");

 		if (duplex == TSE_PCS_PARTNER_DUPLEX_FULL &&
 		    (speed == TSE_PCS_PARTNER_SPEED_10 ||
 		     speed == TSE_PCS_PARTNER_SPEED_100 ||
 		     speed == TSE_PCS_PARTNER_SPEED_1000))
 			writew(SGMII_ADAPTER_ENABLE,
 			       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
 	} else {
 		val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
 		val |= TSE_PCS_CONTROL_RESTART_AN_MASK;
 		writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);

 		tse_pcs_reset(tse_pcs_base, pcs);
 		mod_timer(&pcs->aneg_link_timer, jiffies +
 			  msecs_to_jiffies(AUTONEGO_LINK_TIMER));
 	}
 }

 static void aneg_link_timer_callback(struct timer_list *t)
 {
 	struct tse_pcs *pcs = from_timer(pcs, t, aneg_link_timer);

 	if (pcs->autoneg == AUTONEG_ENABLE)
 		auto_nego_timer_callback(pcs);
 	else if (pcs->autoneg == AUTONEG_DISABLE)
 		pcs_link_timer_callback(pcs);
 }

 void tse_pcs_fix_mac_speed(struct tse_pcs *pcs, struct phy_device *phy_dev,
 			   unsigned int speed)
 {
 	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
 	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;
 	u32 val;

 	writew(SGMII_ADAPTER_ENABLE,
 	       sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);

 	pcs->autoneg = phy_dev->autoneg;

 	if (phy_dev->autoneg == AUTONEG_ENABLE) {
 		val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
 		val |= TSE_PCS_CONTROL_AN_EN_MASK;
 		writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);

 		val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
 		val |= TSE_PCS_USE_SGMII_AN_MASK;
 		writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);

 		val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
 		val |= TSE_PCS_CONTROL_RESTART_AN_MASK;

 		tse_pcs_reset(tse_pcs_base, pcs);

 		timer_setup(&pcs->aneg_link_timer, aneg_link_timer_callback,
 			    0);
 		mod_timer(&pcs->aneg_link_timer, jiffies +
 			  msecs_to_jiffies(AUTONEGO_LINK_TIMER));
 	} else if (phy_dev->autoneg == AUTONEG_DISABLE) {
 		val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
 		val &= ~TSE_PCS_CONTROL_AN_EN_MASK;
 		writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);

 		val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
 		val &= ~TSE_PCS_USE_SGMII_AN_MASK;
 		writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);

 		val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
 		val &= ~TSE_PCS_SGMII_SPEED_MASK;

 		switch (speed) {
 		case 1000:
 			val |= TSE_PCS_SGMII_SPEED_1000;
 			break;
 		case 100:
 			val |= TSE_PCS_SGMII_SPEED_100;
 			break;
 		case 10:
 			val |= TSE_PCS_SGMII_SPEED_10;
 			break;
 		default:
 			return;
 		}
 		writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);

 		tse_pcs_reset(tse_pcs_base, pcs);

 		timer_setup(&pcs->aneg_link_timer, aneg_link_timer_callback,
 			    0);
 		mod_timer(&pcs->aneg_link_timer, jiffies +
 			  msecs_to_jiffies(AUTONEGO_LINK_TIMER));
 	}
 }
	// SPDX-License-Identifier: GPL-2.0-only
	/* Copyright Altera Corporation (C) 2016. All rights reserved.
	*
	* Author: Tien Hock Loh <thloh@altera.com>
	*/

	#include <linux/mfd/syscon.h>
	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/of_net.h>
	#include <linux/phy.h>
	#include <linux/regmap.h>
	#include <linux/reset.h>
	#include <linux/stmmac.h>

	#include "stmmac.h"
	#include "stmmac_platform.h"
	#include "altr_tse_pcs.h"

	#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0
	#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII BIT(1)
	#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII BIT(2)
	#define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
	#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK GENMASK(1, 0)

	#define TSE_PCS_CONTROL_AN_EN_MASK BIT(12)
	#define TSE_PCS_CONTROL_REG 0x00
	#define TSE_PCS_CONTROL_RESTART_AN_MASK BIT(9)
	#define TSE_PCS_CTRL_AUTONEG_SGMII 0x1140
	#define TSE_PCS_IF_MODE_REG 0x28
	#define TSE_PCS_LINK_TIMER_0_REG 0x24
	#define TSE_PCS_LINK_TIMER_1_REG 0x26
	#define TSE_PCS_SIZE 0x40
	#define TSE_PCS_STATUS_AN_COMPLETED_MASK BIT(5)
	#define TSE_PCS_STATUS_LINK_MASK 0x0004
	#define TSE_PCS_STATUS_REG 0x02
	#define TSE_PCS_SGMII_SPEED_1000 BIT(3)
	#define TSE_PCS_SGMII_SPEED_100 BIT(2)
	#define TSE_PCS_SGMII_SPEED_10 0x0
	#define TSE_PCS_SW_RST_MASK 0x8000
	#define TSE_PCS_PARTNER_ABILITY_REG 0x0A
	#define TSE_PCS_PARTNER_DUPLEX_FULL 0x1000
	#define TSE_PCS_PARTNER_DUPLEX_HALF 0x0000
	#define TSE_PCS_PARTNER_DUPLEX_MASK 0x1000
	#define TSE_PCS_PARTNER_SPEED_MASK GENMASK(11, 10)
	#define TSE_PCS_PARTNER_SPEED_1000 BIT(11)
	#define TSE_PCS_PARTNER_SPEED_100 BIT(10)
	#define TSE_PCS_PARTNER_SPEED_10 0x0000
	#define TSE_PCS_PARTNER_SPEED_1000 BIT(11)
	#define TSE_PCS_PARTNER_SPEED_100 BIT(10)
	#define TSE_PCS_PARTNER_SPEED_10 0x0000
	#define TSE_PCS_SGMII_SPEED_MASK GENMASK(3, 2)
	#define TSE_PCS_SGMII_LINK_TIMER_0 0x0D40
	#define TSE_PCS_SGMII_LINK_TIMER_1 0x0003
	#define TSE_PCS_SW_RESET_TIMEOUT 100
	#define TSE_PCS_USE_SGMII_AN_MASK BIT(1)
	#define TSE_PCS_USE_SGMII_ENA BIT(0)
	#define TSE_PCS_IF_USE_SGMII 0x03

	#define SGMII_ADAPTER_CTRL_REG 0x00
	#define SGMII_ADAPTER_DISABLE 0x0001
	#define SGMII_ADAPTER_ENABLE 0x0000

	#define AUTONEGO_LINK_TIMER 20

	static int tse_pcs_reset(void __iomem base, struct tse_pcs pcs)
	{
	int counter = 0;
	u16 val;

	val = readw(base + TSE_PCS_CONTROL_REG);
	val \|= TSE_PCS_SW_RST_MASK;
	writew(val, base + TSE_PCS_CONTROL_REG);

	while (counter < TSE_PCS_SW_RESET_TIMEOUT) {
	val = readw(base + TSE_PCS_CONTROL_REG);
	val &= TSE_PCS_SW_RST_MASK;
	if (val == 0)
	break;
	counter++;
	udelay(1);
	}
	if (counter >= TSE_PCS_SW_RESET_TIMEOUT) {
	dev_err(pcs->dev, "PCS could not get out of sw reset\n");
	return -ETIMEDOUT;
	}

	return 0;
	}

	int tse_pcs_init(void __iomem base, struct tse_pcs pcs)
	{
	int ret = 0;

	writew(TSE_PCS_IF_USE_SGMII, base + TSE_PCS_IF_MODE_REG);

	writew(TSE_PCS_CTRL_AUTONEG_SGMII, base + TSE_PCS_CONTROL_REG);

	writew(TSE_PCS_SGMII_LINK_TIMER_0, base + TSE_PCS_LINK_TIMER_0_REG);
	writew(TSE_PCS_SGMII_LINK_TIMER_1, base + TSE_PCS_LINK_TIMER_1_REG);

	ret = tse_pcs_reset(base, pcs);
	if (ret == 0)
	writew(SGMII_ADAPTER_ENABLE,
	pcs->sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);

	return ret;
	}

	static void pcs_link_timer_callback(struct tse_pcs *pcs)
	{
	u16 val = 0;
	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;

	val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
	val &= TSE_PCS_STATUS_LINK_MASK;

	if (val != 0) {
	dev_dbg(pcs->dev, "Adapter: Link is established\n");
	writew(SGMII_ADAPTER_ENABLE,
	sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
	} else {
	mod_timer(&pcs->aneg_link_timer, jiffies +
	msecs_to_jiffies(AUTONEGO_LINK_TIMER));
	}
	}

	static void auto_nego_timer_callback(struct tse_pcs *pcs)
	{
	u16 val = 0;
	u16 speed = 0;
	u16 duplex = 0;
	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;

	val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
	val &= TSE_PCS_STATUS_AN_COMPLETED_MASK;

	if (val != 0) {
	dev_dbg(pcs->dev, "Adapter: Auto Negotiation is completed\n");
	val = readw(tse_pcs_base + TSE_PCS_PARTNER_ABILITY_REG);
	speed = val & TSE_PCS_PARTNER_SPEED_MASK;
	duplex = val & TSE_PCS_PARTNER_DUPLEX_MASK;

	if (speed == TSE_PCS_PARTNER_SPEED_10 &&
	duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
	dev_dbg(pcs->dev,
	"Adapter: Link Partner is Up - 10/Full\n");
	else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
	duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
	dev_dbg(pcs->dev,
	"Adapter: Link Partner is Up - 100/Full\n");
	else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
	duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
	dev_dbg(pcs->dev,
	"Adapter: Link Partner is Up - 1000/Full\n");
	else if (speed == TSE_PCS_PARTNER_SPEED_10 &&
	duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
	dev_err(pcs->dev,
	"Adapter does not support Half Duplex\n");
	else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
	duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
	dev_err(pcs->dev,
	"Adapter does not support Half Duplex\n");
	else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
	duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
	dev_err(pcs->dev,
	"Adapter does not support Half Duplex\n");
	else
	dev_err(pcs->dev,
	"Adapter: Invalid Partner Speed and Duplex\n");

	if (duplex == TSE_PCS_PARTNER_DUPLEX_FULL &&
	(speed == TSE_PCS_PARTNER_SPEED_10 \|\|
	speed == TSE_PCS_PARTNER_SPEED_100 \|\|
	speed == TSE_PCS_PARTNER_SPEED_1000))
	writew(SGMII_ADAPTER_ENABLE,
	sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);
	} else {
	val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
	val \|= TSE_PCS_CONTROL_RESTART_AN_MASK;
	writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);

	tse_pcs_reset(tse_pcs_base, pcs);
	mod_timer(&pcs->aneg_link_timer, jiffies +
	msecs_to_jiffies(AUTONEGO_LINK_TIMER));
	}
	}

	static void aneg_link_timer_callback(struct timer_list *t)
	{
	struct tse_pcs *pcs = from_timer(pcs, t, aneg_link_timer);

	if (pcs->autoneg == AUTONEG_ENABLE)
	auto_nego_timer_callback(pcs);
	else if (pcs->autoneg == AUTONEG_DISABLE)
	pcs_link_timer_callback(pcs);
	}

	void tse_pcs_fix_mac_speed(struct tse_pcs pcs, struct phy_device phy_dev,
	unsigned int speed)
	{
	void __iomem *tse_pcs_base = pcs->tse_pcs_base;
	void __iomem *sgmii_adapter_base = pcs->sgmii_adapter_base;
	u32 val;

	writew(SGMII_ADAPTER_ENABLE,
	sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG);

	pcs->autoneg = phy_dev->autoneg;

	if (phy_dev->autoneg == AUTONEG_ENABLE) {
	val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
	val \|= TSE_PCS_CONTROL_AN_EN_MASK;
	writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);

	val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
	val \|= TSE_PCS_USE_SGMII_AN_MASK;
	writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);

	val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
	val \|= TSE_PCS_CONTROL_RESTART_AN_MASK;

	tse_pcs_reset(tse_pcs_base, pcs);

	timer_setup(&pcs->aneg_link_timer, aneg_link_timer_callback,
	0);
	mod_timer(&pcs->aneg_link_timer, jiffies +
	msecs_to_jiffies(AUTONEGO_LINK_TIMER));
	} else if (phy_dev->autoneg == AUTONEG_DISABLE) {
	val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
	val &= ~TSE_PCS_CONTROL_AN_EN_MASK;
	writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);

	val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
	val &= ~TSE_PCS_USE_SGMII_AN_MASK;
	writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);

	val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
	val &= ~TSE_PCS_SGMII_SPEED_MASK;

	switch (speed) {
	case 1000:
	val \|= TSE_PCS_SGMII_SPEED_1000;
	break;
	case 100:
	val \|= TSE_PCS_SGMII_SPEED_100;
	break;
	case 10:
	val \|= TSE_PCS_SGMII_SPEED_10;
	break;
	default:
	return;
	}
	writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);

	tse_pcs_reset(tse_pcs_base, pcs);

	timer_setup(&pcs->aneg_link_timer, aneg_link_timer_callback,
	0);
	mod_timer(&pcs->aneg_link_timer, jiffies +
	msecs_to_jiffies(AUTONEGO_LINK_TIMER));
	}
	}