drivers/net/phy/dp83869.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * TI PHY drivers
  *
  */

 #include <common.h>
 #include <phy.h>
 #include <linux/compat.h>
 #include <malloc.h>

 #include <dm.h>
 #include <dt-bindings/net/ti-dp83869.h>

 /* TI DP83869 */
 #define DP83869_DEVADDR		0x1f

 #define MII_DP83869_PHYCTRL	0x10
 #define MII_DP83869_MICR	0x12
 #define MII_DP83869_CFG2	0x14
 #define MII_DP83869_BISCR	0x16
 #define DP83869_CTRL		0x1f
 #define DP83869_CFG4		0x1e

 /* Extended Registers */
 #define DP83869_GEN_CFG3	0x0031
 #define DP83869_RGMIICTL	0x0032
 #define DP83869_STRAP_STS1	0x006E
 #define DP83869_RGMIIDCTL	0x0086
 #define DP83869_IO_MUX_CFG	0x0170
 #define DP83869_OP_MODE		0x01df
 #define DP83869_FX_CTRL		0x0c00

 #define DP83869_SW_RESET	BIT(15)
 #define DP83869_SW_RESTART	BIT(14)

 /* MICR Interrupt bits */
 #define MII_DP83869_MICR_AN_ERR_INT_EN		BIT(15)
 #define MII_DP83869_MICR_SPEED_CHNG_INT_EN	BIT(14)
 #define MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN	BIT(13)
 #define MII_DP83869_MICR_PAGE_RXD_INT_EN	BIT(12)
 #define MII_DP83869_MICR_AUTONEG_COMP_INT_EN	BIT(11)
 #define MII_DP83869_MICR_LINK_STS_CHNG_INT_EN	BIT(10)
 #define MII_DP83869_MICR_FALSE_CARRIER_INT_EN	BIT(8)
 #define MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN	BIT(4)
 #define MII_DP83869_MICR_WOL_INT_EN		BIT(3)
 #define MII_DP83869_MICR_XGMII_ERR_INT_EN	BIT(2)
 #define MII_DP83869_MICR_POL_CHNG_INT_EN	BIT(1)
 #define MII_DP83869_MICR_JABBER_INT_EN		BIT(0)

 #define MII_DP83869_BMCR_DEFAULT		(BMCR_ANENABLE | \
 						 BMCR_FULLDPLX | \
 						 BMCR_SPEED1000)

 /* This is the same bit mask as the BMCR so re-use the BMCR default */
 #define DP83869_FX_CTRL_DEFAULT MII_DP83869_BMCR_DEFAULT

 /* CFG1 bits */
 #define DP83869_CFG1_DEFAULT			(ADVERTISE_1000HALF | \
 						 ADVERTISE_1000FULL | \
 						 CTL1000_AS_MASTER)

 /* RGMIICTL bits */
 #define DP83869_RGMII_TX_CLK_DELAY_EN		BIT(1)
 #define DP83869_RGMII_RX_CLK_DELAY_EN		BIT(0)

 /* STRAP_STS1 bits */
 #define DP83869_STRAP_OP_MODE_MASK		GENMASK(2, 0)
 #define DP83869_STRAP_STS1_RESERVED		BIT(11)
 #define DP83869_STRAP_MIRROR_ENABLED		BIT(12)

 /* PHY CTRL bits */
 #define DP83869_PHYCR_RX_FIFO_DEPTH_SHIFT		12
 #define DP83869_PHYCR_RX_FIFO_DEPTH_MASK		GENMASK(13, 12)
 #define DP83869_PHYCR_TX_FIFO_DEPTH_SHIFT		14
 #define DP83869_PHYCR_TX_FIFO_DEPTH_MASK		GENMASK(15, 14)
 #define DP83869_PHYCR_RESERVED_MASK			BIT(11)
 #define DP83869_PHYCR_MDI_CROSSOVER_SHIFT		5
 #define DP83869_PHYCR_MDI_CROSSOVER_MDIX		2
 #define DP83869_PHY_CTRL_DEFAULT			0x48

 /* RGMIIDCTL bits */
 #define DP83869_RGMII_TX_CLK_DELAY_SHIFT	4
 #define DP83869_CLK_DELAY_STEP			250
 #define DP83869_CLK_DELAY_MIN			250
 #define DP83869_CLK_DELAY_MAX			4000
 #define DP83869_CLK_DELAY_DEFAULT		2000

 /* CFG2 bits */
 #define MII_DP83869_CFG2_SPEEDOPT_10EN		0x0040
 #define MII_DP83869_CFG2_SGMII_AUTONEGEN	0x0080
 #define MII_DP83869_CFG2_SPEEDOPT_ENH		0x0100
 #define MII_DP83869_CFG2_SPEEDOPT_CNT		0x0800
 #define MII_DP83869_CFG2_SPEEDOPT_INTLOW	0x2000
 #define MII_DP83869_CFG2_MASK			0x003F

 /* User setting - can be taken from DTS */
 #define DEFAULT_FIFO_DEPTH	DP83869_PHYCR_FIFO_DEPTH_4_B_NIB

 /* IO_MUX_CFG bits */
 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL	0x1f

 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX	0x0
 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN	0x1f
 #define DP83869_IO_MUX_CFG_CLK_O_DISABLE	BIT(6)
 #define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT	8
 #define DP83869_IO_MUX_CFG_CLK_O_SEL_MASK	\
 		GENMASK(0x1f, DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT)

 /* CFG3 bits */
 #define DP83869_CFG3_PORT_MIRROR_EN		BIT(0)

 /* OP MODE bits */
 #define DP83869_OP_MODE_MII			BIT(5)
 #define DP83869_SGMII_RGMII_BRIDGE		BIT(6)

 enum {
 	DP83869_PORT_MIRRORING_KEEP,
 	DP83869_PORT_MIRRORING_EN,
 	DP83869_PORT_MIRRORING_DIS,
 };

 struct dp83869_private {
 	int tx_fifo_depth;
 	int rx_fifo_depth;
 	s32 rx_int_delay;
 	s32 tx_int_delay;
 	int io_impedance;
 	int port_mirroring;
 	bool set_clk_output;
 	int clk_output_sel;
 	int mode;
 };

 static int dp83869_readext(struct phy_device *phydev, int addr, int devad, int reg)
 {
 	return phy_read_mmd(phydev, devad, reg);
 }

 static int dp83869_writeext(struct phy_device *phydev, int addr, int devad, int reg, u16 val)
 {
 	return phy_write_mmd(phydev, devad, reg, val);
 }

 static int dp83869_config_port_mirroring(struct phy_device *phydev)
 {
 	struct dp83869_private *dp83869 =
 		(struct dp83869_private *)phydev->priv;
 	u16 val;

 	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_CFG4);

 	if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
 		val |= DP83869_CFG3_PORT_MIRROR_EN;
 	else
 		val &= ~DP83869_CFG3_PORT_MIRROR_EN;

 	phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_CFG4, val);

 	return 0;
 }

 static int dp83869_set_strapped_mode(struct phy_device *phydev)
 {
 	struct dp83869_private *dp83869 = phydev->priv;
 	int val;

 	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
 	if (val < 0)
 		return val;

 	dp83869->mode = val & DP83869_STRAP_OP_MODE_MASK;

 	return 0;
 }

 /**
  * dp83869_data_init - Convenience function for setting PHY specific data
  *
  * @phydev: the phy_device struct
  */
 static int dp83869_of_init(struct phy_device *phydev)
 {
 	struct dp83869_private * const dp83869 = phydev->priv;
 	int ret;
 	ofnode node;

 	node = phy_get_ofnode(phydev);
 	if (!ofnode_valid(node))
 		return -EINVAL;

 	dp83869->io_impedance = -EINVAL;

 	/* Optional configuration, set to default if required */
 	dp83869->clk_output_sel = ofnode_read_u32_default(node, "ti,clk-output-sel",
 							  DP83869_CLK_O_SEL_CHN_A_RCLK);

 	if (dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK &&
 	    dp83869->clk_output_sel != DP83869_CLK_O_SEL_OFF)
 		dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;

 	/* If operation mode is not set use setting from straps */
 	ret = ofnode_read_s32(node, "ti,op-mode", &dp83869->mode);
 	if (ret == 0) {
 		if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
 		    dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
 			return -EINVAL;
 	} else {
 		ret = dp83869_set_strapped_mode(phydev);
 		if (ret)
 			return ret;
 	}

 	if (ofnode_read_bool(node, "ti,max-output-impedance"))
 		dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
 	else if (ofnode_read_bool(node, "ti,min-output-impedance"))
 		dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;

 	if (ofnode_read_bool(node, "enet-phy-lane-swap")) {
 		dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
 	} else {
 		ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);

 		if (ret < 0)
 			return ret;

 		if (ret & DP83869_STRAP_MIRROR_ENABLED)
 			dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
 		else
 			dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
 	}

 	dp83869->rx_fifo_depth = ofnode_read_s32_default(node, "rx-fifo-depth",
 							 DP83869_PHYCR_FIFO_DEPTH_4_B_NIB);

 	dp83869->tx_fifo_depth = ofnode_read_s32_default(node, "tx-fifo-depth",
 							 DP83869_PHYCR_FIFO_DEPTH_4_B_NIB);

 	/* Internal clock delay values can be configured in steps of
 	 * 250ps (0.25ns). The register field for clock delay is 4-bits wide,
 	 * the values range from 0b0000 for 0.25ns to 0b1111 for 4ns.
 	 */

 	/* RX delay *must* be specified if internal delay of RX is used. */
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 	    phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
 		dp83869->rx_int_delay = ofnode_read_u32_default(node,
 			"rx-internal-delay-ps", DP83869_CLK_DELAY_DEFAULT);
 		if (dp83869->rx_int_delay > DP83869_CLK_DELAY_MAX ||
 		    dp83869->rx_int_delay < DP83869_CLK_DELAY_MIN ||
 		    dp83869->rx_int_delay % DP83869_CLK_DELAY_STEP) {
 			dp83869->rx_int_delay = DP83869_CLK_DELAY_DEFAULT;
 			pr_warn("rx-internal-delay-ps not set/invalid, default"
 				" to %ups\n", DP83869_CLK_DELAY_DEFAULT);
 		}

 		dp83869->rx_int_delay =
 			(dp83869->rx_int_delay - DP83869_CLK_DELAY_STEP)
 			/ DP83869_CLK_DELAY_STEP;
 	}

 	/* TX delay *must* be specified if internal delay of TX is used. */
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 	    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 		dp83869->tx_int_delay = ofnode_read_u32_default(node,
 			"tx-internal-delay-ps", DP83869_CLK_DELAY_DEFAULT);
 		if (dp83869->tx_int_delay > DP83869_CLK_DELAY_MAX ||
 		    dp83869->tx_int_delay < DP83869_CLK_DELAY_MIN ||
 		    dp83869->tx_int_delay % DP83869_CLK_DELAY_STEP) {
 			dp83869->tx_int_delay = DP83869_CLK_DELAY_DEFAULT;
 			pr_warn("tx-internal-delay-ps not set/invalid, default"
 				" to %ups\n", DP83869_CLK_DELAY_DEFAULT);
 		}

 		dp83869->tx_int_delay =
 			(dp83869->tx_int_delay - DP83869_CLK_DELAY_STEP)
 			/ DP83869_CLK_DELAY_STEP;
 	}

 	return 0;
 }

 static int dp83869_configure_rgmii(struct phy_device *phydev,
 				   struct dp83869_private *dp83869)
 {
 	int ret = 0, val;

 	if (phy_interface_is_rgmii(phydev)) {
 		val = phy_read(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL);
 		if (val < 0)
 			return val;

 		val &= ~(DP83869_PHYCR_TX_FIFO_DEPTH_MASK | DP83869_PHYCR_RX_FIFO_DEPTH_MASK);
 		val |= (dp83869->tx_fifo_depth << DP83869_PHYCR_TX_FIFO_DEPTH_SHIFT);
 		val |= (dp83869->rx_fifo_depth << DP83869_PHYCR_RX_FIFO_DEPTH_SHIFT);

 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL, val);
 		if (ret)
 			return ret;
 	}

 	if (dp83869->io_impedance >= 0) {
 		val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG);

 		val &= ~DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
 		val |= dp83869->io_impedance & DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG, val);

 		if (ret)
 			return ret;
 	}

 	return ret;
 }

 static int dp83869_configure_mode(struct phy_device *phydev,
 				  struct dp83869_private *dp83869)
 {
 	int phy_ctrl_val;
 	int ret, val;

 	if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
 	    dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
 		return -EINVAL;

 	/* Below init sequence for each operational mode is defined in
 	 * section 9.4.8 of the datasheet.
 	 */
 	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
 			    dp83869->mode);
 	if (ret)
 		return ret;

 	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
 	if (ret)
 		return ret;

 	phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_PHYCR_RX_FIFO_DEPTH_SHIFT |
 			dp83869->tx_fifo_depth << DP83869_PHYCR_TX_FIFO_DEPTH_SHIFT |
 			DP83869_PHY_CTRL_DEFAULT);

 	switch (dp83869->mode) {
 	case DP83869_RGMII_COPPER_ETHERNET:
 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
 				phy_ctrl_val);
 		if (ret)
 			return ret;

 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, DP83869_CFG1_DEFAULT);
 		if (ret)
 			return ret;

 		ret = dp83869_configure_rgmii(phydev, dp83869);
 		if (ret)
 			return ret;
 		break;
 	case DP83869_RGMII_SGMII_BRIDGE:
 		val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE);

 		val |= DP83869_SGMII_RGMII_BRIDGE;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE, val);

 		if (ret)
 			return ret;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 				    DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 		if (ret)
 			return ret;

 		break;
 	case DP83869_1000M_MEDIA_CONVERT:
 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
 				phy_ctrl_val);
 		if (ret)
 			return ret;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 				    DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 		if (ret)
 			return ret;
 		break;
 	case DP83869_100M_MEDIA_CONVERT:
 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
 				phy_ctrl_val);
 		if (ret)
 			return ret;
 		break;
 	case DP83869_SGMII_COPPER_ETHERNET:
 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
 				phy_ctrl_val);
 		if (ret)
 			return ret;

 		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, DP83869_CFG1_DEFAULT);
 		if (ret)
 			return ret;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 				    DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 		if (ret)
 			return ret;

 		break;
 	default:
 		return -EINVAL;
 	}

 	return ret;
 }

 static int dp83869_config(struct phy_device *phydev)
 {
 	struct dp83869_private *dp83869;
 	unsigned int val;
 	int ret;

 	dp83869 = (struct dp83869_private *)phydev->priv;

 	ret = dp83869_of_init(phydev);
 	if (ret)
 		return ret;

 	ret = dp83869_configure_mode(phydev, dp83869);
 	if (ret)
 		return ret;

 	if (dp83869->port_mirroring != DP83869_PORT_MIRRORING_KEEP)
 		dp83869_config_port_mirroring(phydev);

 	/* Clock output selection if muxing property is set */
 	if (dp83869->clk_output_sel != DP83869_CLK_O_SEL_REF_CLK) {
 		val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG);

 		val &= ~DP83869_IO_MUX_CFG_CLK_O_SEL_MASK;
 		val |= dp83869->clk_output_sel << DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG, val);

 		if (ret)
 			return ret;
 	}

 	if (phy_interface_is_rgmii(phydev)) {
 		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIIDCTL,
 				    dp83869->rx_int_delay |
 			dp83869->tx_int_delay << DP83869_RGMII_TX_CLK_DELAY_SHIFT);
 		if (ret)
 			return ret;

 		val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
 		val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
 			DP83869_RGMII_RX_CLK_DELAY_EN);

 		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
 			val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
 				 DP83869_RGMII_RX_CLK_DELAY_EN);

 		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
 			val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;

 		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
 			val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;

 		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
 				    val);
 	}

 	genphy_config_aneg(phydev);
 	return 0;
 }

 static int dp83869_probe(struct phy_device *phydev)
 {
 	struct dp83869_private *dp83869;

 	dp83869 = kzalloc(sizeof(*dp83869), GFP_KERNEL);
 	if (!dp83869)
 		return -ENOMEM;

 	phydev->priv = dp83869;
 	return 0;
 }

 U_BOOT_PHY_DRIVER(dp83869) = {
 	.name = "TI DP83869",
 	.uid = 0x2000a0f1,
 	.mask = 0xfffffff0,
 	.features = PHY_GBIT_FEATURES,
 	.probe = dp83869_probe,
 	.config = &dp83869_config,
 	.startup = &genphy_startup,
 	.shutdown = &genphy_shutdown,
 	.readext = dp83869_readext,
 	.writeext = dp83869_writeext
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* TI PHY drivers
	*
	*/

	#include <common.h>
	#include <phy.h>
	#include <linux/compat.h>
	#include <malloc.h>

	#include <dm.h>
	#include <dt-bindings/net/ti-dp83869.h>

	/* TI DP83869 */
	#define DP83869_DEVADDR 0x1f

	#define MII_DP83869_PHYCTRL 0x10
	#define MII_DP83869_MICR 0x12
	#define MII_DP83869_CFG2 0x14
	#define MII_DP83869_BISCR 0x16
	#define DP83869_CTRL 0x1f
	#define DP83869_CFG4 0x1e

	/* Extended Registers */
	#define DP83869_GEN_CFG3 0x0031
	#define DP83869_RGMIICTL 0x0032
	#define DP83869_STRAP_STS1 0x006E
	#define DP83869_RGMIIDCTL 0x0086
	#define DP83869_IO_MUX_CFG 0x0170
	#define DP83869_OP_MODE 0x01df
	#define DP83869_FX_CTRL 0x0c00

	#define DP83869_SW_RESET BIT(15)
	#define DP83869_SW_RESTART BIT(14)

	/* MICR Interrupt bits */
	#define MII_DP83869_MICR_AN_ERR_INT_EN BIT(15)
	#define MII_DP83869_MICR_SPEED_CHNG_INT_EN BIT(14)
	#define MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
	#define MII_DP83869_MICR_PAGE_RXD_INT_EN BIT(12)
	#define MII_DP83869_MICR_AUTONEG_COMP_INT_EN BIT(11)
	#define MII_DP83869_MICR_LINK_STS_CHNG_INT_EN BIT(10)
	#define MII_DP83869_MICR_FALSE_CARRIER_INT_EN BIT(8)
	#define MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
	#define MII_DP83869_MICR_WOL_INT_EN BIT(3)
	#define MII_DP83869_MICR_XGMII_ERR_INT_EN BIT(2)
	#define MII_DP83869_MICR_POL_CHNG_INT_EN BIT(1)
	#define MII_DP83869_MICR_JABBER_INT_EN BIT(0)

	#define MII_DP83869_BMCR_DEFAULT (BMCR_ANENABLE \| \
	BMCR_FULLDPLX \| \
	BMCR_SPEED1000)

	/* This is the same bit mask as the BMCR so re-use the BMCR default */
	#define DP83869_FX_CTRL_DEFAULT MII_DP83869_BMCR_DEFAULT

	/* CFG1 bits */
	#define DP83869_CFG1_DEFAULT (ADVERTISE_1000HALF \| \
	ADVERTISE_1000FULL \| \
	CTL1000_AS_MASTER)

	/* RGMIICTL bits */
	#define DP83869_RGMII_TX_CLK_DELAY_EN BIT(1)
	#define DP83869_RGMII_RX_CLK_DELAY_EN BIT(0)

	/* STRAP_STS1 bits */
	#define DP83869_STRAP_OP_MODE_MASK GENMASK(2, 0)
	#define DP83869_STRAP_STS1_RESERVED BIT(11)
	#define DP83869_STRAP_MIRROR_ENABLED BIT(12)

	/* PHY CTRL bits */
	#define DP83869_PHYCR_RX_FIFO_DEPTH_SHIFT 12
	#define DP83869_PHYCR_RX_FIFO_DEPTH_MASK GENMASK(13, 12)
	#define DP83869_PHYCR_TX_FIFO_DEPTH_SHIFT 14
	#define DP83869_PHYCR_TX_FIFO_DEPTH_MASK GENMASK(15, 14)
	#define DP83869_PHYCR_RESERVED_MASK BIT(11)
	#define DP83869_PHYCR_MDI_CROSSOVER_SHIFT 5
	#define DP83869_PHYCR_MDI_CROSSOVER_MDIX 2
	#define DP83869_PHY_CTRL_DEFAULT 0x48

	/* RGMIIDCTL bits */
	#define DP83869_RGMII_TX_CLK_DELAY_SHIFT 4
	#define DP83869_CLK_DELAY_STEP 250
	#define DP83869_CLK_DELAY_MIN 250
	#define DP83869_CLK_DELAY_MAX 4000
	#define DP83869_CLK_DELAY_DEFAULT 2000

	/* CFG2 bits */
	#define MII_DP83869_CFG2_SPEEDOPT_10EN 0x0040
	#define MII_DP83869_CFG2_SGMII_AUTONEGEN 0x0080
	#define MII_DP83869_CFG2_SPEEDOPT_ENH 0x0100
	#define MII_DP83869_CFG2_SPEEDOPT_CNT 0x0800
	#define MII_DP83869_CFG2_SPEEDOPT_INTLOW 0x2000
	#define MII_DP83869_CFG2_MASK 0x003F

	/* User setting - can be taken from DTS */
	#define DEFAULT_FIFO_DEPTH DP83869_PHYCR_FIFO_DEPTH_4_B_NIB

	/* IO_MUX_CFG bits */
	#define DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f

	#define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
	#define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
	#define DP83869_IO_MUX_CFG_CLK_O_DISABLE BIT(6)
	#define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT 8
	#define DP83869_IO_MUX_CFG_CLK_O_SEL_MASK \
	GENMASK(0x1f, DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT)

	/* CFG3 bits */
	#define DP83869_CFG3_PORT_MIRROR_EN BIT(0)

	/* OP MODE bits */
	#define DP83869_OP_MODE_MII BIT(5)
	#define DP83869_SGMII_RGMII_BRIDGE BIT(6)

	enum {
	DP83869_PORT_MIRRORING_KEEP,
	DP83869_PORT_MIRRORING_EN,
	DP83869_PORT_MIRRORING_DIS,
	};

	struct dp83869_private {
	int tx_fifo_depth;
	int rx_fifo_depth;
	s32 rx_int_delay;
	s32 tx_int_delay;
	int io_impedance;
	int port_mirroring;
	bool set_clk_output;
	int clk_output_sel;
	int mode;
	};

	static int dp83869_readext(struct phy_device *phydev, int addr, int devad, int reg)
	{
	return phy_read_mmd(phydev, devad, reg);
	}

	static int dp83869_writeext(struct phy_device *phydev, int addr, int devad, int reg, u16 val)
	{
	return phy_write_mmd(phydev, devad, reg, val);
	}

	static int dp83869_config_port_mirroring(struct phy_device *phydev)
	{
	struct dp83869_private *dp83869 =
	(struct dp83869_private *)phydev->priv;
	u16 val;

	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_CFG4);

	if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
	val \|= DP83869_CFG3_PORT_MIRROR_EN;
	else
	val &= ~DP83869_CFG3_PORT_MIRROR_EN;

	phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_CFG4, val);

	return 0;
	}

	static int dp83869_set_strapped_mode(struct phy_device *phydev)
	{
	struct dp83869_private *dp83869 = phydev->priv;
	int val;

	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
	if (val < 0)
	return val;

	dp83869->mode = val & DP83869_STRAP_OP_MODE_MASK;

	return 0;
	}

	/**
	* dp83869_data_init - Convenience function for setting PHY specific data
	*
	* @phydev: the phy_device struct
	*/
	static int dp83869_of_init(struct phy_device *phydev)
	{
	struct dp83869_private * const dp83869 = phydev->priv;
	int ret;
	ofnode node;

	node = phy_get_ofnode(phydev);
	if (!ofnode_valid(node))
	return -EINVAL;

	dp83869->io_impedance = -EINVAL;

	/* Optional configuration, set to default if required */
	dp83869->clk_output_sel = ofnode_read_u32_default(node, "ti,clk-output-sel",
	DP83869_CLK_O_SEL_CHN_A_RCLK);

	if (dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK &&
	dp83869->clk_output_sel != DP83869_CLK_O_SEL_OFF)
	dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;

	/* If operation mode is not set use setting from straps */
	ret = ofnode_read_s32(node, "ti,op-mode", &dp83869->mode);
	if (ret == 0) {
	if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET \|\|
	dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
	return -EINVAL;
	} else {
	ret = dp83869_set_strapped_mode(phydev);
	if (ret)
	return ret;
	}

	if (ofnode_read_bool(node, "ti,max-output-impedance"))
	dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
	else if (ofnode_read_bool(node, "ti,min-output-impedance"))
	dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;

	if (ofnode_read_bool(node, "enet-phy-lane-swap")) {
	dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
	} else {
	ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);

	if (ret < 0)
	return ret;

	if (ret & DP83869_STRAP_MIRROR_ENABLED)
	dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
	else
	dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
	}

	dp83869->rx_fifo_depth = ofnode_read_s32_default(node, "rx-fifo-depth",
	DP83869_PHYCR_FIFO_DEPTH_4_B_NIB);

	dp83869->tx_fifo_depth = ofnode_read_s32_default(node, "tx-fifo-depth",
	DP83869_PHYCR_FIFO_DEPTH_4_B_NIB);

	/* Internal clock delay values can be configured in steps of
	* 250ps (0.25ns). The register field for clock delay is 4-bits wide,
	* the values range from 0b0000 for 0.25ns to 0b1111 for 4ns.
	*/

	/* RX delay must be specified if internal delay of RX is used. */
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID \|\|
	phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
	dp83869->rx_int_delay = ofnode_read_u32_default(node,
	"rx-internal-delay-ps", DP83869_CLK_DELAY_DEFAULT);
	if (dp83869->rx_int_delay > DP83869_CLK_DELAY_MAX \|\|
	dp83869->rx_int_delay < DP83869_CLK_DELAY_MIN \|\|
	dp83869->rx_int_delay % DP83869_CLK_DELAY_STEP) {
	dp83869->rx_int_delay = DP83869_CLK_DELAY_DEFAULT;
	pr_warn("rx-internal-delay-ps not set/invalid, default"
	" to %ups\n", DP83869_CLK_DELAY_DEFAULT);
	}

	dp83869->rx_int_delay =
	(dp83869->rx_int_delay - DP83869_CLK_DELAY_STEP)
	/ DP83869_CLK_DELAY_STEP;
	}

	/* TX delay must be specified if internal delay of TX is used. */
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID \|\|
	phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
	dp83869->tx_int_delay = ofnode_read_u32_default(node,
	"tx-internal-delay-ps", DP83869_CLK_DELAY_DEFAULT);
	if (dp83869->tx_int_delay > DP83869_CLK_DELAY_MAX \|\|
	dp83869->tx_int_delay < DP83869_CLK_DELAY_MIN \|\|
	dp83869->tx_int_delay % DP83869_CLK_DELAY_STEP) {
	dp83869->tx_int_delay = DP83869_CLK_DELAY_DEFAULT;
	pr_warn("tx-internal-delay-ps not set/invalid, default"
	" to %ups\n", DP83869_CLK_DELAY_DEFAULT);
	}

	dp83869->tx_int_delay =
	(dp83869->tx_int_delay - DP83869_CLK_DELAY_STEP)
	/ DP83869_CLK_DELAY_STEP;
	}

	return 0;
	}

	static int dp83869_configure_rgmii(struct phy_device *phydev,
	struct dp83869_private *dp83869)
	{
	int ret = 0, val;

	if (phy_interface_is_rgmii(phydev)) {
	val = phy_read(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL);
	if (val < 0)
	return val;

	val &= ~(DP83869_PHYCR_TX_FIFO_DEPTH_MASK \| DP83869_PHYCR_RX_FIFO_DEPTH_MASK);
	val \|= (dp83869->tx_fifo_depth << DP83869_PHYCR_TX_FIFO_DEPTH_SHIFT);
	val \|= (dp83869->rx_fifo_depth << DP83869_PHYCR_RX_FIFO_DEPTH_SHIFT);

	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL, val);
	if (ret)
	return ret;
	}

	if (dp83869->io_impedance >= 0) {
	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG);

	val &= ~DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
	val \|= dp83869->io_impedance & DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG, val);

	if (ret)
	return ret;
	}

	return ret;
	}

	static int dp83869_configure_mode(struct phy_device *phydev,
	struct dp83869_private *dp83869)
	{
	int phy_ctrl_val;
	int ret, val;

	if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET \|\|
	dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
	return -EINVAL;

	/* Below init sequence for each operational mode is defined in
	* section 9.4.8 of the datasheet.
	*/
	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
	dp83869->mode);
	if (ret)
	return ret;

	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
	if (ret)
	return ret;

	phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_PHYCR_RX_FIFO_DEPTH_SHIFT \|
	dp83869->tx_fifo_depth << DP83869_PHYCR_TX_FIFO_DEPTH_SHIFT \|
	DP83869_PHY_CTRL_DEFAULT);

	switch (dp83869->mode) {
	case DP83869_RGMII_COPPER_ETHERNET:
	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
	phy_ctrl_val);
	if (ret)
	return ret;

	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, DP83869_CFG1_DEFAULT);
	if (ret)
	return ret;

	ret = dp83869_configure_rgmii(phydev, dp83869);
	if (ret)
	return ret;
	break;
	case DP83869_RGMII_SGMII_BRIDGE:
	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE);

	val \|= DP83869_SGMII_RGMII_BRIDGE;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE, val);

	if (ret)
	return ret;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR,
	DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
	if (ret)
	return ret;

	break;
	case DP83869_1000M_MEDIA_CONVERT:
	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
	phy_ctrl_val);
	if (ret)
	return ret;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR,
	DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
	if (ret)
	return ret;
	break;
	case DP83869_100M_MEDIA_CONVERT:
	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
	phy_ctrl_val);
	if (ret)
	return ret;
	break;
	case DP83869_SGMII_COPPER_ETHERNET:
	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83869_PHYCTRL,
	phy_ctrl_val);
	if (ret)
	return ret;

	ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, DP83869_CFG1_DEFAULT);
	if (ret)
	return ret;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR,
	DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
	if (ret)
	return ret;

	break;
	default:
	return -EINVAL;
	}

	return ret;
	}

	static int dp83869_config(struct phy_device *phydev)
	{
	struct dp83869_private *dp83869;
	unsigned int val;
	int ret;

	dp83869 = (struct dp83869_private *)phydev->priv;

	ret = dp83869_of_init(phydev);
	if (ret)
	return ret;

	ret = dp83869_configure_mode(phydev, dp83869);
	if (ret)
	return ret;

	if (dp83869->port_mirroring != DP83869_PORT_MIRRORING_KEEP)
	dp83869_config_port_mirroring(phydev);

	/* Clock output selection if muxing property is set */
	if (dp83869->clk_output_sel != DP83869_CLK_O_SEL_REF_CLK) {
	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG);

	val &= ~DP83869_IO_MUX_CFG_CLK_O_SEL_MASK;
	val \|= dp83869->clk_output_sel << DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_IO_MUX_CFG, val);

	if (ret)
	return ret;
	}

	if (phy_interface_is_rgmii(phydev)) {
	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIIDCTL,
	dp83869->rx_int_delay \|
	dp83869->tx_int_delay << DP83869_RGMII_TX_CLK_DELAY_SHIFT);
	if (ret)
	return ret;

	val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
	val \|= (DP83869_RGMII_TX_CLK_DELAY_EN \|
	DP83869_RGMII_RX_CLK_DELAY_EN);

	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
	val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN \|
	DP83869_RGMII_RX_CLK_DELAY_EN);

	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
	val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;

	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
	val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;

	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
	val);
	}

	genphy_config_aneg(phydev);
	return 0;
	}

	static int dp83869_probe(struct phy_device *phydev)
	{
	struct dp83869_private *dp83869;

	dp83869 = kzalloc(sizeof(*dp83869), GFP_KERNEL);
	if (!dp83869)
	return -ENOMEM;

	phydev->priv = dp83869;
	return 0;
	}

	U_BOOT_PHY_DRIVER(dp83869) = {
	.name = "TI DP83869",
	.uid = 0x2000a0f1,
	.mask = 0xfffffff0,
	.features = PHY_GBIT_FEATURES,
	.probe = dp83869_probe,
	.config = &dp83869_config,
	.startup = &genphy_startup,
	.shutdown = &genphy_shutdown,
	.readext = dp83869_readext,
	.writeext = dp83869_writeext
	};