drivers/net/phy/broadcom.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Broadcom PHY drivers
  *
  * Copyright 2010-2011 Freescale Semiconductor, Inc.
  * author Andy Fleming
  */
 #include <common.h>
 #include <phy.h>
 #include <linux/delay.h>

 /* Broadcom BCM54xx -- taken from linux sungem_phy */
 #define MIIM_BCM54xx_AUXCNTL			0x18
 #define MIIM_BCM54xx_AUXCNTL_ENCODE(val) (((val & 0x7) << 12)|(val & 0x7))
 #define MIIM_BCM54xx_AUXSTATUS			0x19
 #define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK	0x0700
 #define MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT	8

 #define MIIM_BCM54XX_SHD			0x1c
 #define MIIM_BCM54XX_SHD_WRITE			0x8000
 #define MIIM_BCM54XX_SHD_VAL(x)			((x & 0x1f) << 10)
 #define MIIM_BCM54XX_SHD_DATA(x)		((x & 0x3ff) << 0)
 #define MIIM_BCM54XX_SHD_WR_ENCODE(val, data)	\
 	(MIIM_BCM54XX_SHD_WRITE | MIIM_BCM54XX_SHD_VAL(val) | \
 	 MIIM_BCM54XX_SHD_DATA(data))

 #define MIIM_BCM54XX_EXP_DATA		0x15	/* Expansion register data */
 #define MIIM_BCM54XX_EXP_SEL		0x17	/* Expansion register select */
 #define MIIM_BCM54XX_EXP_SEL_SSD	0x0e00	/* Secondary SerDes select */
 #define MIIM_BCM54XX_EXP_SEL_ER		0x0f00	/* Expansion register select */

 #define MIIM_BCM_AUXCNTL_SHDWSEL_MISC	0x0007
 #define MIIM_BCM_AUXCNTL_SHDWSEL_MISC_WIRESPEED_EN	0x0010
 #define MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_EN		0x0080
 #define MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_SKEW_EN	0x0100
 #define MIIM_BCM_AUXCNTL_MISC_FORCE_AMDIX		0x0200
 #define MIIM_BCM_AUXCNTL_ACTL_SMDSP_EN			0x0800
 #define MIIM_BCM_AUXCNTL_MISC_WREN			0x8000

 #define MIIM_BCM_CHANNEL_WIDTH    0x2000

 #define BCM54810_SHD_CLK_CTL				0x3
 #define BCM54810_SHD_CLK_CTL_GTXCLK_EN			BIT(9)

 #define BCM54XX_SHD_LEDS1		0x0d
 #define BCM_LED_SRC_LINKSPD2		0x1
 #define BCM_LED_SRC_ACTIVITYLED		0x3
 #define BCM54XX_SHD_LEDS1_LED3(src)	(((src) & 0xf) << 4)
 #define BCM54XX_SHD_LEDS1_LED1(src)	(((src) & 0xf) << 0)

 static int bcm54xx_auxctl_read(struct phy_device *phydev, u16 regnum)
 {
 	/* The register must be written to both the Shadow Register Select and
 	 * the Shadow Read Register Selector
 	 */
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
 		  MIIM_BCM54xx_AUXCNTL_ENCODE(regnum));
 	return phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL);
 }

 static int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
 {
 	return phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, regnum | val);
 }

 static int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow)
 {
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
 		  MIIM_BCM54XX_SHD_VAL(shadow));
 	return MIIM_BCM54XX_SHD_DATA(phy_read(phydev, MDIO_DEVAD_NONE,
 					      MIIM_BCM54XX_SHD));
 }

 static int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow, u16 val)
 {
 	return phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
 			 MIIM_BCM54XX_SHD_WR_ENCODE(shadow, val));
 }

 static int bcm54xx_config_clock_delay(struct phy_device *phydev)
 {
 	int rc, val;

 	/* handling PHY's internal RX clock delay */
 	val = bcm54xx_auxctl_read(phydev, MIIM_BCM_AUXCNTL_SHDWSEL_MISC);
 	val |= MIIM_BCM_AUXCNTL_MISC_WREN;
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII ||
 	    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 		/* Disable RGMII RXC-RXD skew */
 		val &= ~MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_SKEW_EN;
 	}
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 	    phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
 		/* Enable RGMII RXC-RXD skew */
 		val |= MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_SKEW_EN;
 	}
 	rc = bcm54xx_auxctl_write(phydev, MIIM_BCM_AUXCNTL_SHDWSEL_MISC, val);
 	if (rc < 0)
 		return rc;

 	/* handling PHY's internal TX clock delay */
 	val = bcm_phy_read_shadow(phydev, BCM54810_SHD_CLK_CTL);
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII ||
 	    phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
 		/* Disable internal TX clock delay */
 		val &= ~BCM54810_SHD_CLK_CTL_GTXCLK_EN;
 	}
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 	    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 		/* Enable internal TX clock delay */
 		val |= BCM54810_SHD_CLK_CTL_GTXCLK_EN;
 	}
 	rc = bcm_phy_write_shadow(phydev, BCM54810_SHD_CLK_CTL, val);
 	if (rc < 0)
 		return rc;

 	return 0;
 }

 static void bcm_phy_write_misc(struct phy_device *phydev,
 			       u16 reg, u16 chl, u16 value)
 {
 	int reg_val;

 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
 		  MIIM_BCM_AUXCNTL_SHDWSEL_MISC);

 	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL);
 	reg_val |= MIIM_BCM_AUXCNTL_ACTL_SMDSP_EN;
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg_val);

 	reg_val = (chl * MIIM_BCM_CHANNEL_WIDTH) | reg;
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL, reg_val);

 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA, value);
 }

 /* Broadcom BCM5461S */
 static int bcm5461_config(struct phy_device *phydev)
 {
 	genphy_config_aneg(phydev);

 	phy_reset(phydev);

 	return 0;
 }

 /* Broadcom BCM54210E */
 static int bcm54210e_config(struct phy_device *phydev)
 {
 	int ret;

 	ret = bcm54xx_config_clock_delay(phydev);
 	if (ret < 0)
 		return ret;

 	ret = bcm5461_config(phydev);
 	if (ret < 0)
 		return ret;

 	/* Configure LEDs to blink. */
 	bcm_phy_write_shadow(phydev, BCM54XX_SHD_LEDS1,
 			     BCM54XX_SHD_LEDS1_LED1(BCM_LED_SRC_ACTIVITYLED) |
 			     BCM54XX_SHD_LEDS1_LED3(BCM_LED_SRC_LINKSPD2));

 	return 0;
 }

 static int bcm54xx_parse_status(struct phy_device *phydev)
 {
 	unsigned int mii_reg;

 	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXSTATUS);

 	switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >>
 			MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) {
 	case 1:
 		phydev->duplex = DUPLEX_HALF;
 		phydev->speed = SPEED_10;
 		break;
 	case 2:
 		phydev->duplex = DUPLEX_FULL;
 		phydev->speed = SPEED_10;
 		break;
 	case 3:
 		phydev->duplex = DUPLEX_HALF;
 		phydev->speed = SPEED_100;
 		break;
 	case 5:
 		phydev->duplex = DUPLEX_FULL;
 		phydev->speed = SPEED_100;
 		break;
 	case 6:
 		phydev->duplex = DUPLEX_HALF;
 		phydev->speed = SPEED_1000;
 		break;
 	case 7:
 		phydev->duplex = DUPLEX_FULL;
 		phydev->speed = SPEED_1000;
 		break;
 	default:
 		printf("Auto-neg error, defaulting to 10BT/HD\n");
 		phydev->duplex = DUPLEX_HALF;
 		phydev->speed = SPEED_10;
 		break;
 	}

 	return 0;
 }

 static int bcm54xx_startup(struct phy_device *phydev)
 {
 	int ret;

 	/* Read the Status (2x to make sure link is right) */
 	ret = genphy_update_link(phydev);
 	if (ret)
 		return ret;

 	return bcm54xx_parse_status(phydev);
 }

 /* Broadcom BCM5482S */
 /*
  * "Ethernet@Wirespeed" needs to be enabled to achieve link in certain
  * circumstances.  eg a gigabit TSEC connected to a gigabit switch with
  * a 4-wire ethernet cable.  Both ends advertise gigabit, but can't
  * link.  "Ethernet@Wirespeed" reduces advertised speed until link
  * can be achieved.
  */
 static u32 bcm5482_read_wirespeed(struct phy_device *phydev, u32 reg)
 {
 	return (phy_read(phydev, MDIO_DEVAD_NONE, reg) & 0x8FFF) | 0x8010;
 }

 static int bcm5482_config(struct phy_device *phydev)
 {
 	unsigned int reg;

 	/* reset the PHY */
 	reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 	reg |= BMCR_RESET;
 	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, reg);

 	/* Setup read from auxilary control shadow register 7 */
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
 			MIIM_BCM54xx_AUXCNTL_ENCODE(7));
 	/* Read Misc Control register and or in Ethernet@Wirespeed */
 	reg = bcm5482_read_wirespeed(phydev, MIIM_BCM54xx_AUXCNTL);
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg);

 	/* Initial config/enable of secondary SerDes interface */
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
 			MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf));
 	/* Write intial value to secondary SerDes Contol */
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
 			MIIM_BCM54XX_EXP_SEL_SSD | 0);
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA,
 			BMCR_ANRESTART);
 	/* Enable copper/fiber auto-detect */
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
 			MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201));

 	genphy_config_aneg(phydev);

 	return 0;
 }

 static void bcm_cygnus_afe(struct phy_device *phydev)
 {
 	/* ensures smdspclk is enabled */
 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, 0x0c30);

 	/* AFE_VDAC_ICTRL_0 bit 7:4 Iq=1100 for 1g 10bt, normal modes */
 	bcm_phy_write_misc(phydev, 0x39, 0x01, 0xA7C8);

 	/* AFE_HPF_TRIM_OTHERS bit11=1, short cascode for all modes*/
 	bcm_phy_write_misc(phydev, 0x3A, 0x00, 0x0803);

 	/* AFE_TX_CONFIG_1 bit 7:4 Iq=1100 for test modes */
 	bcm_phy_write_misc(phydev, 0x3A, 0x01, 0xA740);

 	/* AFE TEMPSEN_OTHERS rcal_HT, rcal_LT 10000 */
 	bcm_phy_write_misc(phydev, 0x3A, 0x03, 0x8400);

 	/* AFE_FUTURE_RSV bit 2:0 rccal <2:0>=100 */
 	bcm_phy_write_misc(phydev, 0x3B, 0x00, 0x0004);

 	/* Adjust bias current trim to overcome digital offSet */
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x1E, 0x02);

 	/* make rcal=100, since rdb default is 000 */
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B1);
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0010);

 	/* CORE_EXPB0, Reset R_CAL/RC_CAL Engine */
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B0);
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0010);

 	/* CORE_EXPB0, Disable Reset R_CAL/RC_CAL Engine */
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B0);
 	phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0000);
 }

 static int bcm_cygnus_config(struct phy_device *phydev)
 {
 	genphy_config_aneg(phydev);
 	phy_reset(phydev);
 	/* AFE settings for PHY stability */
 	bcm_cygnus_afe(phydev);
 	/* Forcing aneg after applying the AFE settings */
 	genphy_restart_aneg(phydev);

 	return 0;
 }

 /*
  * Find out if PHY is in copper or serdes mode by looking at Expansion Reg
  * 0x42 - "Operating Mode Status Register"
  */
 static int bcm5482_is_serdes(struct phy_device *phydev)
 {
 	u16 val;
 	int serdes = 0;

 	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
 			MIIM_BCM54XX_EXP_SEL_ER | 0x42);
 	val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);

 	switch (val & 0x1f) {
 	case 0x0d:	/* RGMII-to-100Base-FX */
 	case 0x0e:	/* RGMII-to-SGMII */
 	case 0x0f:	/* RGMII-to-SerDes */
 	case 0x12:	/* SGMII-to-SerDes */
 	case 0x13:	/* SGMII-to-100Base-FX */
 	case 0x16:	/* SerDes-to-Serdes */
 		serdes = 1;
 		break;
 	case 0x6:	/* RGMII-to-Copper */
 	case 0x14:	/* SGMII-to-Copper */
 	case 0x17:	/* SerDes-to-Copper */
 		break;
 	default:
 		printf("ERROR, invalid PHY mode (0x%x\n)", val);
 		break;
 	}

 	return serdes;
 }

 /*
  * Determine SerDes link speed and duplex from Expansion reg 0x42 "Operating
  * Mode Status Register"
  */
 static u32 bcm5482_parse_serdes_sr(struct phy_device *phydev)
 {
 	u16 val;
 	int i = 0;

 	/* Wait 1s for link - Clause 37 autonegotiation happens very fast */
 	while (1) {
 		phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
 				MIIM_BCM54XX_EXP_SEL_ER | 0x42);
 		val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);

 		if (val & 0x8000)
 			break;

 		if (i++ > 1000) {
 			phydev->link = 0;
 			return 1;
 		}

 		udelay(1000);	/* 1 ms */
 	}

 	phydev->link = 1;
 	switch ((val >> 13) & 0x3) {
 	case (0x00):
 		phydev->speed = 10;
 		break;
 	case (0x01):
 		phydev->speed = 100;
 		break;
 	case (0x02):
 		phydev->speed = 1000;
 		break;
 	}

 	phydev->duplex = (val & 0x1000) == 0x1000;

 	return 0;
 }

 /*
  * Figure out if BCM5482 is in serdes or copper mode and determine link
  * configuration accordingly
  */
 static int bcm5482_startup(struct phy_device *phydev)
 {
 	int ret;

 	if (bcm5482_is_serdes(phydev)) {
 		bcm5482_parse_serdes_sr(phydev);
 		phydev->port = PORT_FIBRE;
 		return 0;
 	}

 	/* Wait for auto-negotiation to complete or fail */
 	ret = genphy_update_link(phydev);
 	if (ret)
 		return ret;

 	/* Parse BCM54xx copper aux status register */
 	return bcm54xx_parse_status(phydev);
 }

 U_BOOT_PHY_DRIVER(bcm54210e) = {
 	.name = "Broadcom BCM54210E",
 	.uid = 0x600d84a0,
 	.mask = 0xfffffff0,
 	.features = PHY_GBIT_FEATURES,
 	.config = &bcm54210e_config,
 	.startup = &bcm54xx_startup,
 	.shutdown = &genphy_shutdown,
 };

 U_BOOT_PHY_DRIVER(bcm5461s) = {
 	.name = "Broadcom BCM5461S",
 	.uid = 0x2060c0,
 	.mask = 0xfffff0,
 	.features = PHY_GBIT_FEATURES,
 	.config = &bcm5461_config,
 	.startup = &bcm54xx_startup,
 	.shutdown = &genphy_shutdown,
 };

 U_BOOT_PHY_DRIVER(bcm5464s) = {
 	.name = "Broadcom BCM5464S",
 	.uid = 0x2060b0,
 	.mask = 0xfffff0,
 	.features = PHY_GBIT_FEATURES,
 	.config = &bcm5461_config,
 	.startup = &bcm54xx_startup,
 	.shutdown = &genphy_shutdown,
 };

 U_BOOT_PHY_DRIVER(bcm5482s) = {
 	.name = "Broadcom BCM5482S",
 	.uid = 0x143bcb0,
 	.mask = 0xffffff0,
 	.features = PHY_GBIT_FEATURES,
 	.config = &bcm5482_config,
 	.startup = &bcm5482_startup,
 	.shutdown = &genphy_shutdown,
 };

 U_BOOT_PHY_DRIVER(bcm_cygnus) = {
 	.name = "Broadcom CYGNUS GPHY",
 	.uid = 0xae025200,
 	.mask = 0xfffff0,
 	.features = PHY_GBIT_FEATURES,
 	.config = &bcm_cygnus_config,
 	.startup = &genphy_startup,
 	.shutdown = &genphy_shutdown,
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Broadcom PHY drivers
	*
	* Copyright 2010-2011 Freescale Semiconductor, Inc.
	* author Andy Fleming
	*/
	#include <common.h>
	#include <phy.h>
	#include <linux/delay.h>

	/* Broadcom BCM54xx -- taken from linux sungem_phy */
	#define MIIM_BCM54xx_AUXCNTL 0x18
	#define MIIM_BCM54xx_AUXCNTL_ENCODE(val) (((val & 0x7) << 12)\|(val & 0x7))
	#define MIIM_BCM54xx_AUXSTATUS 0x19
	#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK 0x0700
	#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT 8

	#define MIIM_BCM54XX_SHD 0x1c
	#define MIIM_BCM54XX_SHD_WRITE 0x8000
	#define MIIM_BCM54XX_SHD_VAL(x) ((x & 0x1f) << 10)
	#define MIIM_BCM54XX_SHD_DATA(x) ((x & 0x3ff) << 0)
	#define MIIM_BCM54XX_SHD_WR_ENCODE(val, data) \
	(MIIM_BCM54XX_SHD_WRITE \| MIIM_BCM54XX_SHD_VAL(val) \| \
	MIIM_BCM54XX_SHD_DATA(data))

	#define MIIM_BCM54XX_EXP_DATA 0x15 /* Expansion register data */
	#define MIIM_BCM54XX_EXP_SEL 0x17 /* Expansion register select */
	#define MIIM_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */
	#define MIIM_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */

	#define MIIM_BCM_AUXCNTL_SHDWSEL_MISC 0x0007
	#define MIIM_BCM_AUXCNTL_SHDWSEL_MISC_WIRESPEED_EN 0x0010
	#define MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_EN 0x0080
	#define MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_SKEW_EN 0x0100
	#define MIIM_BCM_AUXCNTL_MISC_FORCE_AMDIX 0x0200
	#define MIIM_BCM_AUXCNTL_ACTL_SMDSP_EN 0x0800
	#define MIIM_BCM_AUXCNTL_MISC_WREN 0x8000

	#define MIIM_BCM_CHANNEL_WIDTH 0x2000

	#define BCM54810_SHD_CLK_CTL 0x3
	#define BCM54810_SHD_CLK_CTL_GTXCLK_EN BIT(9)

	#define BCM54XX_SHD_LEDS1 0x0d
	#define BCM_LED_SRC_LINKSPD2 0x1
	#define BCM_LED_SRC_ACTIVITYLED 0x3
	#define BCM54XX_SHD_LEDS1_LED3(src) (((src) & 0xf) << 4)
	#define BCM54XX_SHD_LEDS1_LED1(src) (((src) & 0xf) << 0)

	static int bcm54xx_auxctl_read(struct phy_device *phydev, u16 regnum)
	{
	/* The register must be written to both the Shadow Register Select and
	* the Shadow Read Register Selector
	*/
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
	MIIM_BCM54xx_AUXCNTL_ENCODE(regnum));
	return phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL);
	}

	static int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
	{
	return phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, regnum \| val);
	}

	static int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow)
	{
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
	MIIM_BCM54XX_SHD_VAL(shadow));
	return MIIM_BCM54XX_SHD_DATA(phy_read(phydev, MDIO_DEVAD_NONE,
	MIIM_BCM54XX_SHD));
	}

	static int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow, u16 val)
	{
	return phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
	MIIM_BCM54XX_SHD_WR_ENCODE(shadow, val));
	}

	static int bcm54xx_config_clock_delay(struct phy_device *phydev)
	{
	int rc, val;

	/* handling PHY's internal RX clock delay */
	val = bcm54xx_auxctl_read(phydev, MIIM_BCM_AUXCNTL_SHDWSEL_MISC);
	val \|= MIIM_BCM_AUXCNTL_MISC_WREN;
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII \|\|
	phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
	/* Disable RGMII RXC-RXD skew */
	val &= ~MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_SKEW_EN;
	}
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID \|\|
	phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
	/* Enable RGMII RXC-RXD skew */
	val \|= MIIM_BCM_AUXCNTL_SHDWSEL_MISC_RGMII_SKEW_EN;
	}
	rc = bcm54xx_auxctl_write(phydev, MIIM_BCM_AUXCNTL_SHDWSEL_MISC, val);
	if (rc < 0)
	return rc;

	/* handling PHY's internal TX clock delay */
	val = bcm_phy_read_shadow(phydev, BCM54810_SHD_CLK_CTL);
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII \|\|
	phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
	/* Disable internal TX clock delay */
	val &= ~BCM54810_SHD_CLK_CTL_GTXCLK_EN;
	}
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID \|\|
	phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
	/* Enable internal TX clock delay */
	val \|= BCM54810_SHD_CLK_CTL_GTXCLK_EN;
	}
	rc = bcm_phy_write_shadow(phydev, BCM54810_SHD_CLK_CTL, val);
	if (rc < 0)
	return rc;

	return 0;
	}

	static void bcm_phy_write_misc(struct phy_device *phydev,
	u16 reg, u16 chl, u16 value)
	{
	int reg_val;

	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
	MIIM_BCM_AUXCNTL_SHDWSEL_MISC);

	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL);
	reg_val \|= MIIM_BCM_AUXCNTL_ACTL_SMDSP_EN;
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg_val);

	reg_val = (chl * MIIM_BCM_CHANNEL_WIDTH) \| reg;
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL, reg_val);

	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA, value);
	}

	/* Broadcom BCM5461S */
	static int bcm5461_config(struct phy_device *phydev)
	{
	genphy_config_aneg(phydev);

	phy_reset(phydev);

	return 0;
	}

	/* Broadcom BCM54210E */
	static int bcm54210e_config(struct phy_device *phydev)
	{
	int ret;

	ret = bcm54xx_config_clock_delay(phydev);
	if (ret < 0)
	return ret;

	ret = bcm5461_config(phydev);
	if (ret < 0)
	return ret;

	/* Configure LEDs to blink. */
	bcm_phy_write_shadow(phydev, BCM54XX_SHD_LEDS1,
	BCM54XX_SHD_LEDS1_LED1(BCM_LED_SRC_ACTIVITYLED) \|
	BCM54XX_SHD_LEDS1_LED3(BCM_LED_SRC_LINKSPD2));

	return 0;
	}

	static int bcm54xx_parse_status(struct phy_device *phydev)
	{
	unsigned int mii_reg;

	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXSTATUS);

	switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >>
	MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) {
	case 1:
	phydev->duplex = DUPLEX_HALF;
	phydev->speed = SPEED_10;
	break;
	case 2:
	phydev->duplex = DUPLEX_FULL;
	phydev->speed = SPEED_10;
	break;
	case 3:
	phydev->duplex = DUPLEX_HALF;
	phydev->speed = SPEED_100;
	break;
	case 5:
	phydev->duplex = DUPLEX_FULL;
	phydev->speed = SPEED_100;
	break;
	case 6:
	phydev->duplex = DUPLEX_HALF;
	phydev->speed = SPEED_1000;
	break;
	case 7:
	phydev->duplex = DUPLEX_FULL;
	phydev->speed = SPEED_1000;
	break;
	default:
	printf("Auto-neg error, defaulting to 10BT/HD\n");
	phydev->duplex = DUPLEX_HALF;
	phydev->speed = SPEED_10;
	break;
	}

	return 0;
	}

	static int bcm54xx_startup(struct phy_device *phydev)
	{
	int ret;

	/* Read the Status (2x to make sure link is right) */
	ret = genphy_update_link(phydev);
	if (ret)
	return ret;

	return bcm54xx_parse_status(phydev);
	}

	/* Broadcom BCM5482S */
	/*
	* "Ethernet@Wirespeed" needs to be enabled to achieve link in certain
	* circumstances. eg a gigabit TSEC connected to a gigabit switch with
	* a 4-wire ethernet cable. Both ends advertise gigabit, but can't
	* link. "Ethernet@Wirespeed" reduces advertised speed until link
	* can be achieved.
	*/
	static u32 bcm5482_read_wirespeed(struct phy_device *phydev, u32 reg)
	{
	return (phy_read(phydev, MDIO_DEVAD_NONE, reg) & 0x8FFF) \| 0x8010;
	}

	static int bcm5482_config(struct phy_device *phydev)
	{
	unsigned int reg;

	/* reset the PHY */
	reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
	reg \|= BMCR_RESET;
	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, reg);

	/* Setup read from auxilary control shadow register 7 */
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
	MIIM_BCM54xx_AUXCNTL_ENCODE(7));
	/* Read Misc Control register and or in Ethernet@Wirespeed */
	reg = bcm5482_read_wirespeed(phydev, MIIM_BCM54xx_AUXCNTL);
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg);

	/* Initial config/enable of secondary SerDes interface */
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
	MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf));
	/* Write intial value to secondary SerDes Contol */
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
	MIIM_BCM54XX_EXP_SEL_SSD \| 0);
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA,
	BMCR_ANRESTART);
	/* Enable copper/fiber auto-detect */
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
	MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201));

	genphy_config_aneg(phydev);

	return 0;
	}

	static void bcm_cygnus_afe(struct phy_device *phydev)
	{
	/* ensures smdspclk is enabled */
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, 0x0c30);

	/* AFE_VDAC_ICTRL_0 bit 7:4 Iq=1100 for 1g 10bt, normal modes */
	bcm_phy_write_misc(phydev, 0x39, 0x01, 0xA7C8);

	/* AFE_HPF_TRIM_OTHERS bit11=1, short cascode for all modes*/
	bcm_phy_write_misc(phydev, 0x3A, 0x00, 0x0803);

	/* AFE_TX_CONFIG_1 bit 7:4 Iq=1100 for test modes */
	bcm_phy_write_misc(phydev, 0x3A, 0x01, 0xA740);

	/* AFE TEMPSEN_OTHERS rcal_HT, rcal_LT 10000 */
	bcm_phy_write_misc(phydev, 0x3A, 0x03, 0x8400);

	/* AFE_FUTURE_RSV bit 2:0 rccal <2:0>=100 */
	bcm_phy_write_misc(phydev, 0x3B, 0x00, 0x0004);

	/* Adjust bias current trim to overcome digital offSet */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1E, 0x02);

	/* make rcal=100, since rdb default is 000 */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B1);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0010);

	/* CORE_EXPB0, Reset R_CAL/RC_CAL Engine */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B0);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0010);

	/* CORE_EXPB0, Disable Reset R_CAL/RC_CAL Engine */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B0);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0000);
	}

	static int bcm_cygnus_config(struct phy_device *phydev)
	{
	genphy_config_aneg(phydev);
	phy_reset(phydev);
	/* AFE settings for PHY stability */
	bcm_cygnus_afe(phydev);
	/* Forcing aneg after applying the AFE settings */
	genphy_restart_aneg(phydev);

	return 0;
	}

	/*
	* Find out if PHY is in copper or serdes mode by looking at Expansion Reg
	* 0x42 - "Operating Mode Status Register"
	*/
	static int bcm5482_is_serdes(struct phy_device *phydev)
	{
	u16 val;
	int serdes = 0;

	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
	MIIM_BCM54XX_EXP_SEL_ER \| 0x42);
	val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);

	switch (val & 0x1f) {
	case 0x0d: /* RGMII-to-100Base-FX */
	case 0x0e: /* RGMII-to-SGMII */
	case 0x0f: /* RGMII-to-SerDes */
	case 0x12: /* SGMII-to-SerDes */
	case 0x13: /* SGMII-to-100Base-FX */
	case 0x16: /* SerDes-to-Serdes */
	serdes = 1;
	break;
	case 0x6: /* RGMII-to-Copper */
	case 0x14: /* SGMII-to-Copper */
	case 0x17: /* SerDes-to-Copper */
	break;
	default:
	printf("ERROR, invalid PHY mode (0x%x\n)", val);
	break;
	}

	return serdes;
	}

	/*
	* Determine SerDes link speed and duplex from Expansion reg 0x42 "Operating
	* Mode Status Register"
	*/
	static u32 bcm5482_parse_serdes_sr(struct phy_device *phydev)
	{
	u16 val;
	int i = 0;

	/* Wait 1s for link - Clause 37 autonegotiation happens very fast */
	while (1) {
	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
	MIIM_BCM54XX_EXP_SEL_ER \| 0x42);
	val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);

	if (val & 0x8000)
	break;

	if (i++ > 1000) {
	phydev->link = 0;
	return 1;
	}

	udelay(1000); /* 1 ms */
	}

	phydev->link = 1;
	switch ((val >> 13) & 0x3) {
	case (0x00):
	phydev->speed = 10;
	break;
	case (0x01):
	phydev->speed = 100;
	break;
	case (0x02):
	phydev->speed = 1000;
	break;
	}

	phydev->duplex = (val & 0x1000) == 0x1000;

	return 0;
	}

	/*
	* Figure out if BCM5482 is in serdes or copper mode and determine link
	* configuration accordingly
	*/
	static int bcm5482_startup(struct phy_device *phydev)
	{
	int ret;

	if (bcm5482_is_serdes(phydev)) {
	bcm5482_parse_serdes_sr(phydev);
	phydev->port = PORT_FIBRE;
	return 0;
	}

	/* Wait for auto-negotiation to complete or fail */
	ret = genphy_update_link(phydev);
	if (ret)
	return ret;

	/* Parse BCM54xx copper aux status register */
	return bcm54xx_parse_status(phydev);
	}

	U_BOOT_PHY_DRIVER(bcm54210e) = {
	.name = "Broadcom BCM54210E",
	.uid = 0x600d84a0,
	.mask = 0xfffffff0,
	.features = PHY_GBIT_FEATURES,
	.config = &bcm54210e_config,
	.startup = &bcm54xx_startup,
	.shutdown = &genphy_shutdown,
	};

	U_BOOT_PHY_DRIVER(bcm5461s) = {
	.name = "Broadcom BCM5461S",
	.uid = 0x2060c0,
	.mask = 0xfffff0,
	.features = PHY_GBIT_FEATURES,
	.config = &bcm5461_config,
	.startup = &bcm54xx_startup,
	.shutdown = &genphy_shutdown,
	};

	U_BOOT_PHY_DRIVER(bcm5464s) = {
	.name = "Broadcom BCM5464S",
	.uid = 0x2060b0,
	.mask = 0xfffff0,
	.features = PHY_GBIT_FEATURES,
	.config = &bcm5461_config,
	.startup = &bcm54xx_startup,
	.shutdown = &genphy_shutdown,
	};

	U_BOOT_PHY_DRIVER(bcm5482s) = {
	.name = "Broadcom BCM5482S",
	.uid = 0x143bcb0,
	.mask = 0xffffff0,
	.features = PHY_GBIT_FEATURES,
	.config = &bcm5482_config,
	.startup = &bcm5482_startup,
	.shutdown = &genphy_shutdown,
	};

	U_BOOT_PHY_DRIVER(bcm_cygnus) = {
	.name = "Broadcom CYGNUS GPHY",
	.uid = 0xae025200,
	.mask = 0xfffff0,
	.features = PHY_GBIT_FEATURES,
	.config = &bcm_cygnus_config,
	.startup = &genphy_startup,
	.shutdown = &genphy_shutdown,
	};