DP83869HM: 1000BASE-X: Auto neg not disabled in linux driver dp83869.c

sylvain ferriol

Part Number: DP83869HM
Other Parts Discussed in Thread: DP83869

According to dp83869hm datasheet, in 9.4.2.1:

In fiber mode, the speed is not decided through auto-negotiation. Both sides of the link must be configured to the same operating speed.

But if i look at the driver code, the auto negotiation seems disabled only for 100BASE_FX:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/phy/dp83869.c#n637

	if (dp83869->mode == DP83869_RGMII_1000_BASE) {
		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
				 phydev->supported);
	} else {
		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
				 phydev->supported);
		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
				 phydev->supported);

		/* Auto neg is not supported in 100base FX mode */
		bmcr = phy_read(phydev, MII_BMCR);
		if (bmcr < 0)
			return bmcr;

		phydev->autoneg = AUTONEG_DISABLE;
		linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
		linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);

		if (bmcr & BMCR_ANENABLE) {
			ret =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
			if (ret < 0)
				return ret;
		}
	}

Is there an explanation ?

because, in my project, i had to make a patch disabling auto-neg for 1000BASE-X, in order to have a working link.

thanks

over 2 years ago

0 Alvaro (Al-vuh-roe) Reyes over 2 years ago

TI__Mastermind 19621 points

Hi Sylvain,

Your fiber understanding is correct. We have been putting extra effort into maintaining our drivers code and correcting any bugs that currently exist. At the moment, new drivers have NOT been uploaded to kernel.org yet. For now you can find our most up-to-date drivers on https://github.com/TexasInstruments/ti-ethernet-software. The DP83869 driver was recently updated and it might have the fix you're looking for. If it does not, please report on issue on the github, this will make it easier to track and fix for the next revision.

Regards,

Alvaro

0 sylvain ferriol over 2 years ago in reply to Alvaro (Al-vuh-roe) Reyes

Prodigy 10 points

i looked at the up-to-date driver on https://github.com/TexasInstruments/ti-ethernet-software,
and it's the same

0 Alvaro (Al-vuh-roe) Reyes over 2 years ago in reply to sylvain ferriol

TI__Mastermind 19621 points

Hi Sylvain,

Understood, I will personally go through and see if I can provide a hot fix for this issue.

Please note that I currently do not have a board with the DP83869 configured for fiber to test this on, I will be providing a driver file with the intent of you testing. Please allow me until the end of the week for this.

Regards,

Alvaro

0 Alvaro (Al-vuh-roe) Reyes over 2 years ago in reply to Alvaro (Al-vuh-roe) Reyes

TI__Mastermind 19621 points

Hi Sylvain,

I want to apologize, this week has been hectic and I haven't even looked at the driver yet. This is on my top priority and I will provide an update by Tuesday next week.

Sorry for making you wait.

Regards,

Alvaro

0 Alvaro (Al-vuh-roe) Reyes over 2 years ago in reply to Alvaro (Al-vuh-roe) Reyes

TI__Mastermind 19621 points

Hi Sylvain,

The past week has been hectic. I see error in the code, I simply added the disable auto-neg code into the initial if statement that checks for 1000Base-x mode.

Please let me know if this works for you.

Fullscreen 3443.dp83869.c Download

// SPDX-License-Identifier: GPL-2.0
/* Driver for the Texas Instruments DP83869 PHY
 * Copyright (C) 2019 Texas Instruments Inc.
 *
 * 23Apri2024 Alvaro Reyes (a-reyes1@ti.com)
 * Updated Functions:
 * dp83869_configure_fiber
 * 
 * 21Mar2024 Alvaro Reyes (a-reyes1@ti.com)
 * 
 * New PHY_ID for 869 Added
 * 
 * Updated Functions:
 * dp83869_set_strapped_mode
 * dp83869_configure_mode
 */

#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy.h>
#include <linux/delay.h>
#include <linux/bitfield.h>

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

#define DP83869_REV0_PHY_ID	0x2000a0f1
#define DP83869_REV1_PHY_ID 0x2000a0f3
#define DP83561_PHY_ID		0x2000a1a4

#define PHY_IDEN_REG1		0x2
#define PHY_IDEN_REG2		0x3
#define MII_DP83869_PHYCTRL	0x10
#define MII_DP83869_MICR	0x12
#define MII_DP83869_ISR		0x13
#define DP83869_CFG2		0x14
#define LEDS_CFG1_DP83869	0x18
#define DP83869_CTRL		0x1f
#define DP83869_CFG4		0x1e

/* Extended Registers */
#define DP83869_DEVADDR		0x1f
#define DP83869_GEN_CFG3	0x0031
#define DP83869_RGMIICTL	0x0032
#define DP83869_STRAP_STS1	0x006e
#define DP83869_RGMIIDCTL	0x0086
#define DP83869_RXFCFG		0x0134
#define DP83869_RXFPMD1		0x0136
#define DP83869_RXFPMD2		0x0137
#define DP83869_RXFPMD3		0x0138
#define DP83869_RXFSOP1		0x0139
#define DP83869_RXFSOP2		0x013A
#define DP83869_RXFSOP3		0x013B
#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)

#define MII_DP83869_FIBER_ADVERTISE    (ADVERTISED_FIBRE | \
					ADVERTISED_Pause | \
					ADVERTISED_Asym_Pause)

/* 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)

/* RGMIIDCTL */
#define DP83869_RGMII_CLK_DELAY_SHIFT		4
#define DP83869_CLK_DELAY_DEF			7

/* STRAP_STS1 bits */
#define DP83869_STRAP_OP_MODE_MASK		GENMASK(11, 9)
#define DP83869_STRAP_STS1_RESERVED		BIT(11)
#define DP83869_STRAP_MIRROR_ENABLED           BIT(12)

/* PHYCTRL bits */
#define DP83869_RX_FIFO_SHIFT	12
#define DP83869_TX_FIFO_SHIFT	14

/* PHY_CTRL lower bytes 0x48 are declared as reserved */
#define DP83869_PHY_CTRL_DEFAULT	0x48
#define DP83869_PHYCR_FIFO_DEPTH_MASK	GENMASK(15, 12)
#define DP83869_PHYCR_RESERVED_MASK	BIT(11)

/* 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_SEL_MASK	(0x1f << 8)
#define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT	8
#define DP83869_LED1_MUX_RXER				0xE

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

/* CFG4 bits */
#define DP83869_INT_OE	BIT(7)

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

/* RXFCFG bits*/
#define DP83869_WOL_MAGIC_EN		BIT(0)
#define DP83869_WOL_PATTERN_EN		BIT(1)
#define DP83869_WOL_BCAST_EN		BIT(2)
#define DP83869_WOL_UCAST_EN		BIT(4)
#define DP83869_WOL_SEC_EN		BIT(5)
#define DP83869_WOL_ENH_MAC		BIT(7)

/* CFG2 bits */
#define DP83869_DOWNSHIFT_EN		(BIT(8) | BIT(9))
#define DP83869_DOWNSHIFT_ATTEMPT_MASK	(BIT(10) | BIT(11))
#define DP83869_DOWNSHIFT_1_COUNT_VAL	0
#define DP83869_DOWNSHIFT_2_COUNT_VAL	1
#define DP83869_DOWNSHIFT_4_COUNT_VAL	2
#define DP83869_DOWNSHIFT_8_COUNT_VAL	3
#define DP83869_DOWNSHIFT_1_COUNT	1
#define DP83869_DOWNSHIFT_2_COUNT	2
#define DP83869_DOWNSHIFT_4_COUNT	4
#define DP83869_DOWNSHIFT_8_COUNT	8

/* OPMODE Configure, as per section 9.4.8 of data sheet*/
#define RGMII_to_SGMII			0x43
#define MEDIA_CONVERT_1000M		0x44
#define MEDIA_CONVERT_100M		0x45
#define SGMII_to_COPPER			0x46


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 rxctrl_strap_quirk;
	int clk_output_sel;
	int mode;
};

static int dp83869_read_status(struct phy_device *phydev)
{
	struct dp83869_private *dp83869 = phydev->priv;
	int ret;

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

	if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported)) {
		if (phydev->link) {
			if (dp83869->mode == DP83869_RGMII_100_BASE)
				phydev->speed = SPEED_100;
		} else {
			phydev->speed = SPEED_UNKNOWN;
			phydev->duplex = DUPLEX_UNKNOWN;
		}
	}

	return 0;
}

static int dp83869_ack_interrupt(struct phy_device *phydev)
{
	int err = phy_read(phydev, MII_DP83869_ISR);

	if (err < 0)
		return err;

	return 0;
}

static int dp83869_config_intr(struct phy_device *phydev)
{
	int micr_status = 0, err;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
		err = dp83869_ack_interrupt(phydev);
		if (err)
			return err;

		micr_status = phy_read(phydev, MII_DP83869_MICR);
		if (micr_status < 0)
			return micr_status;

		micr_status |=
			(MII_DP83869_MICR_AN_ERR_INT_EN |
			MII_DP83869_MICR_SPEED_CHNG_INT_EN |
			MII_DP83869_MICR_AUTONEG_COMP_INT_EN |
			MII_DP83869_MICR_LINK_STS_CHNG_INT_EN |
			MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN |
			MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN);

		err = phy_write(phydev, MII_DP83869_MICR, micr_status);
	} else {
		err = phy_write(phydev, MII_DP83869_MICR, micr_status);
		if (err)
			return err;

		err = dp83869_ack_interrupt(phydev);
	}

	return err;
}

static irqreturn_t dp83869_handle_interrupt(struct phy_device *phydev)
{
	int irq_status, irq_enabled;

	irq_status = phy_read(phydev, MII_DP83869_ISR);
	if (irq_status < 0) {
		phy_error(phydev);
		return IRQ_NONE;
	}

	irq_enabled = phy_read(phydev, MII_DP83869_MICR);
	if (irq_enabled < 0) {
		phy_error(phydev);
		return IRQ_NONE;
	}

	if (!(irq_status & irq_enabled))
		return IRQ_NONE;

	phy_trigger_machine(phydev);

	return IRQ_HANDLED;
}

static int dp83869_set_wol(struct phy_device *phydev,
			   struct ethtool_wolinfo *wol)
{
	struct net_device *ndev = phydev->attached_dev;
	int val_rxcfg, val_micr;
	const u8 *mac;
	int ret;

	val_rxcfg = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
	if (val_rxcfg < 0)
		return val_rxcfg;

	val_micr = phy_read(phydev, MII_DP83869_MICR);
	if (val_micr < 0)
		return val_micr;

	if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST |
			    WAKE_BCAST)) {
		val_rxcfg |= DP83869_WOL_ENH_MAC;
		val_micr |= MII_DP83869_MICR_WOL_INT_EN;

		if (wol->wolopts & WAKE_MAGIC ||
		    wol->wolopts & WAKE_MAGICSECURE) {
			mac = (const u8 *)ndev->dev_addr;

			if (!is_valid_ether_addr(mac))
				return -EINVAL;

			ret = phy_write_mmd(phydev, DP83869_DEVADDR,
					    DP83869_RXFPMD1,
					    mac[1] << 8 | mac[0]);
			if (ret)
				return ret;

			ret = phy_write_mmd(phydev, DP83869_DEVADDR,
					    DP83869_RXFPMD2,
					    mac[3] << 8 | mac[2]);
			if (ret)
				return ret;

			ret = phy_write_mmd(phydev, DP83869_DEVADDR,
					    DP83869_RXFPMD3,
					    mac[5] << 8 | mac[4]);
			if (ret)
				return ret;

			val_rxcfg |= DP83869_WOL_MAGIC_EN;
		} else {
			val_rxcfg &= ~DP83869_WOL_MAGIC_EN;
		}

		if (wol->wolopts & WAKE_MAGICSECURE) {
			ret = phy_write_mmd(phydev, DP83869_DEVADDR,
					    DP83869_RXFSOP1,
					    (wol->sopass[1] << 8) | wol->sopass[0]);
			if (ret)
				return ret;

			ret = phy_write_mmd(phydev, DP83869_DEVADDR,
					    DP83869_RXFSOP2,
					    (wol->sopass[3] << 8) | wol->sopass[2]);
			if (ret)
				return ret;
			ret = phy_write_mmd(phydev, DP83869_DEVADDR,
					    DP83869_RXFSOP3,
					    (wol->sopass[5] << 8) | wol->sopass[4]);
			if (ret)
				return ret;

			val_rxcfg |= DP83869_WOL_SEC_EN;
		} else {
			val_rxcfg &= ~DP83869_WOL_SEC_EN;
		}

		if (wol->wolopts & WAKE_UCAST)
			val_rxcfg |= DP83869_WOL_UCAST_EN;
		else
			val_rxcfg &= ~DP83869_WOL_UCAST_EN;

		if (wol->wolopts & WAKE_BCAST)
			val_rxcfg |= DP83869_WOL_BCAST_EN;
		else
			val_rxcfg &= ~DP83869_WOL_BCAST_EN;
	} else {
		val_rxcfg &= ~DP83869_WOL_ENH_MAC;
		val_micr &= ~MII_DP83869_MICR_WOL_INT_EN;
	}

	ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG, val_rxcfg);
	if (ret)
		return ret;

	return phy_write(phydev, MII_DP83869_MICR, val_micr);
}

static void dp83869_get_wol(struct phy_device *phydev,
			    struct ethtool_wolinfo *wol)
{
	int value, sopass_val;

	wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
			WAKE_MAGICSECURE);
	wol->wolopts = 0;

	value = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
	if (value < 0) {
		phydev_err(phydev, "Failed to read RX CFG\n");
		return;
	}

	if (value & DP83869_WOL_UCAST_EN)
		wol->wolopts |= WAKE_UCAST;

	if (value & DP83869_WOL_BCAST_EN)
		wol->wolopts |= WAKE_BCAST;

	if (value & DP83869_WOL_MAGIC_EN)
		wol->wolopts |= WAKE_MAGIC;

	if (value & DP83869_WOL_SEC_EN) {
		sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
					  DP83869_RXFSOP1);
		if (sopass_val < 0) {
			phydev_err(phydev, "Failed to read RX SOP 1\n");
			return;
		}

		wol->sopass[0] = (sopass_val & 0xff);
		wol->sopass[1] = (sopass_val >> 8);

		sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
					  DP83869_RXFSOP2);
		if (sopass_val < 0) {
			phydev_err(phydev, "Failed to read RX SOP 2\n");
			return;
		}

		wol->sopass[2] = (sopass_val & 0xff);
		wol->sopass[3] = (sopass_val >> 8);

		sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
					  DP83869_RXFSOP3);
		if (sopass_val < 0) {
			phydev_err(phydev, "Failed to read RX SOP 3\n");
			return;
		}

		wol->sopass[4] = (sopass_val & 0xff);
		wol->sopass[5] = (sopass_val >> 8);

		wol->wolopts |= WAKE_MAGICSECURE;
	}

	if (!(value & DP83869_WOL_ENH_MAC))
		wol->wolopts = 0;
}

static int dp83869_get_downshift(struct phy_device *phydev, u8 *data)
{
	int val, cnt, enable, count;

	val = phy_read(phydev, DP83869_CFG2);
	if (val < 0)
		return val;

	enable = FIELD_GET(DP83869_DOWNSHIFT_EN, val);
	cnt = FIELD_GET(DP83869_DOWNSHIFT_ATTEMPT_MASK, val);

	switch (cnt) {
	case DP83869_DOWNSHIFT_1_COUNT_VAL:
		count = DP83869_DOWNSHIFT_1_COUNT;
		break;
	case DP83869_DOWNSHIFT_2_COUNT_VAL:
		count = DP83869_DOWNSHIFT_2_COUNT;
		break;
	case DP83869_DOWNSHIFT_4_COUNT_VAL:
		count = DP83869_DOWNSHIFT_4_COUNT;
		break;
	case DP83869_DOWNSHIFT_8_COUNT_VAL:
		count = DP83869_DOWNSHIFT_8_COUNT;
		break;
	default:
		return -EINVAL;
	}

	*data = enable ? count : DOWNSHIFT_DEV_DISABLE;

	return 0;
}

static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
{
	int val, count;

	if (cnt > DP83869_DOWNSHIFT_8_COUNT)
		return -EINVAL;

	if (!cnt)
		return phy_clear_bits(phydev, DP83869_CFG2,
				      DP83869_DOWNSHIFT_EN);

	switch (cnt) {
	case DP83869_DOWNSHIFT_1_COUNT:
		count = DP83869_DOWNSHIFT_1_COUNT_VAL;
		break;
	case DP83869_DOWNSHIFT_2_COUNT:
		count = DP83869_DOWNSHIFT_2_COUNT_VAL;
		break;
	case DP83869_DOWNSHIFT_4_COUNT:
		count = DP83869_DOWNSHIFT_4_COUNT_VAL;
		break;
	case DP83869_DOWNSHIFT_8_COUNT:
		count = DP83869_DOWNSHIFT_8_COUNT_VAL;
		break;
	default:
		phydev_err(phydev,
			   "Downshift count must be 1, 2, 4 or 8\n");
		return -EINVAL;
	}

	val = DP83869_DOWNSHIFT_EN;
	val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count);

	return phy_modify(phydev, DP83869_CFG2,
			  DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK,
			  val);
}

static int dp83869_get_tunable(struct phy_device *phydev,
			       struct ethtool_tunable *tuna, void *data)
{
	switch (tuna->id) {
	case ETHTOOL_PHY_DOWNSHIFT:
		return dp83869_get_downshift(phydev, data);
	default:
		return -EOPNOTSUPP;
	}
}

static int dp83869_set_tunable(struct phy_device *phydev,
			       struct ethtool_tunable *tuna, const void *data)
{
	switch (tuna->id) {
	case ETHTOOL_PHY_DOWNSHIFT:
		return dp83869_set_downshift(phydev, *(const u8 *)data);
	default:
		return -EOPNOTSUPP;
	}
}

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

	if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
		return phy_set_bits_mmd(phydev, DP83869_DEVADDR,
					DP83869_GEN_CFG3,
					DP83869_CFG3_PORT_MIRROR_EN);
	else
		return phy_clear_bits_mmd(phydev, DP83869_DEVADDR,
					  DP83869_GEN_CFG3,
					  DP83869_CFG3_PORT_MIRROR_EN);
}

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) >> 9;

	return 0;
}

#if IS_ENABLED(CONFIG_OF_MDIO)
static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500,
					     1750, 2000, 2250, 2500, 2750, 3000,
					     3250, 3500, 3750, 4000};

static int dp83869_of_init(struct phy_device *phydev)
{
	struct dp83869_private *dp83869 = phydev->priv;
	struct device *dev = &phydev->mdio.dev;
	struct device_node *of_node = dev->of_node;
	int delay_size = ARRAY_SIZE(dp83869_internal_delay);
	int ret;

	if (!of_node)
		return -ENODEV;

	dp83869->io_impedance = -EINVAL;

	/* Optional configuration */
	ret = of_property_read_u32(of_node, "ti,clk-output-sel",
				   &dp83869->clk_output_sel);
	if (ret || dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK)
		dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;

	ret = of_property_read_u32(of_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 (of_property_read_bool(of_node, "ti,max-output-impedance"))
		dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
	else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
		dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;

	if (of_property_read_bool(of_node, "enet-phy-lane-swap")) {
		dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
	} else {
		/* If the lane swap is not in the DT then check the straps */
		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;

		ret = 0;
	}

	if (of_property_read_u32(of_node, "rx-fifo-depth",
				 &dp83869->rx_fifo_depth))
		dp83869->rx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;

	if (of_property_read_u32(of_node, "tx-fifo-depth",
				 &dp83869->tx_fifo_depth))
		dp83869->tx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;

	dp83869->rx_int_delay = phy_get_internal_delay(phydev, dev,
						       &dp83869_internal_delay[0],
						       delay_size, true);
	if (dp83869->rx_int_delay < 0)
		dp83869->rx_int_delay =
				dp83869_internal_delay[DP83869_CLK_DELAY_DEF];

	dp83869->tx_int_delay = phy_get_internal_delay(phydev, dev,
						       &dp83869_internal_delay[0],
						       delay_size, false);
	if (dp83869->tx_int_delay < 0)
		dp83869->tx_int_delay =
				dp83869_internal_delay[DP83869_CLK_DELAY_DEF];

	return ret;
}
#else
static int dp83869_of_init(struct phy_device *phydev)
{
	return dp83869_set_strapped_mode(phydev);
}
#endif /* CONFIG_OF_MDIO */

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, MII_DP83869_PHYCTRL);
		if (val < 0)
			return val;

		val &= ~DP83869_PHYCR_FIFO_DEPTH_MASK;
		val |= (dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT);
		val |= (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT);

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

	if (dp83869->io_impedance >= 0)
		ret = phy_modify_mmd(phydev, DP83869_DEVADDR,
				     DP83869_IO_MUX_CFG,
				     DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL,
				     dp83869->io_impedance &
				     DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL);

	return ret;
}

static int dp83869_configure_fiber(struct phy_device *phydev,
				   struct dp83869_private *dp83869)
{
	int bmcr;
	int ret;

	/* Only allow advertising what this PHY supports */
	linkmode_and(phydev->advertising, phydev->advertising,
		     phydev->supported);

	linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
	linkmode_set_bit(ADVERTISED_FIBRE, phydev->advertising);

	if (dp83869->mode == DP83869_RGMII_1000_BASE) {
		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
				 phydev->supported);
		/* Auto neg is not supported in 1000base FX mode */
		bmcr = phy_read(phydev, MII_BMCR);
		if (bmcr < 0)
			return bmcr;

		phydev->autoneg = AUTONEG_DISABLE;
		linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
		linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);

		if (bmcr & BMCR_ANENABLE) {
			ret =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
			if (ret < 0)
				return ret;
		}
	} else {
		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
				 phydev->supported);
		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
				 phydev->supported);

		/* Auto neg is not supported in 100base FX mode */
		bmcr = phy_read(phydev, MII_BMCR);
		if (bmcr < 0)
			return bmcr;

		phydev->autoneg = AUTONEG_DISABLE;
		linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
		linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);

		if (bmcr & BMCR_ANENABLE) {
			ret =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
			if (ret < 0)
				return ret;
		}
	}

	/* Update advertising from supported */
	linkmode_or(phydev->advertising, phydev->advertising,
		    phydev->supported);

	return 0;
}

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

	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, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
	if (ret)
		return ret;

	phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT |
			dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT |
			DP83869_PHY_CTRL_DEFAULT);

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

		ret = phy_write(phydev, 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:
		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE, RGMII_to_SGMII);
		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, MII_DP83869_PHYCTRL, phy_ctrl_val);
		if (ret)
			return ret;

		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE, MEDIA_CONVERT_1000M);
		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, MII_DP83869_PHYCTRL, phy_ctrl_val);
		if (ret)
			return ret;
		
		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE, MEDIA_CONVERT_100M);
		if (ret)
			return ret;

		ret = phy_write(phydev, LEDS_CFG1_DP83869, DP83869_LED1_MUX_RXER);	
		if (ret)
			return ret;
		
		break;
	case DP83869_SGMII_COPPER_ETHERNET:
		ret = phy_write(phydev, MII_DP83869_PHYCTRL, phy_ctrl_val);
		if (ret)
			return ret;

		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE, SGMII_to_COPPER);
		if (ret)
			return ret;

		ret = phy_write(phydev, 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;
	case DP83869_RGMII_1000_BASE:
	case DP83869_RGMII_100_BASE:
		ret = dp83869_configure_fiber(phydev, dp83869);
		break;
	default:
		return -EINVAL;
	}

	return ret;
}

static int dp83869_config_init(struct phy_device *phydev)
{
	struct dp83869_private *dp83869 = phydev->priv;
	int ret, val;

	/* Force speed optimization for the PHY even if it strapped */
	ret = phy_modify(phydev, DP83869_CFG2, DP83869_DOWNSHIFT_EN,
			 DP83869_DOWNSHIFT_EN);
	if (ret)
		return ret;

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

	/* Enable Interrupt output INT_OE in CFG4 register */
	if (phy_interrupt_is_valid(phydev)) {
		val = phy_read(phydev, DP83869_CFG4);
		val |= DP83869_INT_OE;
		phy_write(phydev, DP83869_CFG4, val);
	}

	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)
		ret = phy_modify_mmd(phydev,
				     DP83869_DEVADDR, DP83869_IO_MUX_CFG,
				     DP83869_IO_MUX_CFG_CLK_O_SEL_MASK,
				     dp83869->clk_output_sel <<
				     DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT);

	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_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);
	}

	return ret;
}

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

	dp83869 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83869),
			       GFP_KERNEL);
	if (!dp83869)
		return -ENOMEM;

	phydev->priv = dp83869;

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

	if (dp83869->mode == DP83869_RGMII_100_BASE ||
	    dp83869->mode == DP83869_RGMII_1000_BASE)
		phydev->port = PORT_FIBRE;
	
	return dp83869_config_init(phydev);
}

static int dp83869_phy_reset(struct phy_device *phydev)
{
	int ret;

	ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESET);
	if (ret < 0)
		return ret;

	usleep_range(10, 20);

	/* Global sw reset sets all registers to default.
	 * Need to set the registers in the PHY to the right config.
	 */
	return dp83869_config_init(phydev);
}


#define DP83869_PHY_DRIVER(_id, _name)				\
{								\
	PHY_ID_MATCH_EXACT(_id),				\
	.name		= (_name),				\
	.probe          = dp83869_probe,			\
	.config_init	= dp83869_config_init,			\
	.soft_reset	= dp83869_phy_reset,			\
	.config_intr	= dp83869_config_intr,			\
	.handle_interrupt = dp83869_handle_interrupt,		\
	.read_status	= dp83869_read_status,			\
	.get_tunable	= dp83869_get_tunable,			\
	.set_tunable	= dp83869_set_tunable,			\
	.get_wol	= dp83869_get_wol,			\
	.set_wol	= dp83869_set_wol,			\
	.suspend	= genphy_suspend,			\
	.resume		= genphy_resume,			\
}

static struct phy_driver dp83869_driver[] = { 
	DP83869_PHY_DRIVER(DP83869_REV1_PHY_ID, "TI DP83869 Rev1"),
	DP83869_PHY_DRIVER(DP83869_REV0_PHY_ID, "TI DP83869 Rev0"),
	DP83869_PHY_DRIVER(DP83561_PHY_ID, "TI DP83561-SP"),
	
};
module_phy_driver(dp83869_driver);

static struct mdio_device_id __maybe_unused dp83869_tbl[] = {
	{ PHY_ID_MATCH_EXACT(DP83869_REV0_PHY_ID) },
	{ PHY_ID_MATCH_EXACT(DP83869_REV1_PHY_ID) },
	{ PHY_ID_MATCH_EXACT(DP83561_PHY_ID) },
	{ }
};
MODULE_DEVICE_TABLE(mdio, dp83869_tbl);

MODULE_DESCRIPTION("Texas Instruments DP83869 PHY driver");
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
MODULE_LICENSE("GPL v2");

Regards,

Alvaro

Interface

Interface forum

DP83869HM: 1000BASE-X: Auto neg not disabled in linux driver dp83869.c