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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2001-2020 Intel Corporation
 */

#include "ixgbe_api.h"
#include "ixgbe_common.h"
#include "ixgbe_phy.h"

STATIC void ixgbe_i2c_start(struct ixgbe_hw *hw);
STATIC void ixgbe_i2c_stop(struct ixgbe_hw *hw);
STATIC void ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data);
STATIC s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data);
STATIC s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw);
STATIC void ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data);
STATIC s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data);
STATIC void ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
STATIC void ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
STATIC s32 ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data);
STATIC bool ixgbe_get_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl);
STATIC s32 ixgbe_read_i2c_sff8472_generic(struct ixgbe_hw *hw, u8 byte_offset,
					  u8 *sff8472_data);

/**
 * ixgbe_out_i2c_byte_ack - Send I2C byte with ack
 * @hw: pointer to the hardware structure
 * @byte: byte to send
 *
 * Returns an error code on error.
 */
STATIC s32 ixgbe_out_i2c_byte_ack(struct ixgbe_hw *hw, u8 byte)
{
	s32 status;

	status = ixgbe_clock_out_i2c_byte(hw, byte);
	if (status)
		return status;
	return ixgbe_get_i2c_ack(hw);
}

/**
 * ixgbe_in_i2c_byte_ack - Receive an I2C byte and send ack
 * @hw: pointer to the hardware structure
 * @byte: pointer to a u8 to receive the byte
 *
 * Returns an error code on error.
 */
STATIC s32 ixgbe_in_i2c_byte_ack(struct ixgbe_hw *hw, u8 *byte)
{
	ixgbe_clock_in_i2c_byte(hw, byte);
	/* ACK */
	return ixgbe_clock_out_i2c_bit(hw, false);
}

/**
 * ixgbe_ones_comp_byte_add - Perform one's complement addition
 * @add1: addend 1
 * @add2: addend 2
 *
 * Returns one's complement 8-bit sum.
 */
STATIC u8 ixgbe_ones_comp_byte_add(u8 add1, u8 add2)
{
	u16 sum = add1 + add2;

	sum = (sum & 0xFF) + (sum >> 8);
	return sum & 0xFF;
}

/**
 * ixgbe_read_i2c_combined_generic_int - Perform I2C read combined operation
 * @hw: pointer to the hardware structure
 * @addr: I2C bus address to read from
 * @reg: I2C device register to read from
 * @val: pointer to location to receive read value
 * @lock: true if to take and release semaphore
 *
 * Returns an error code on error.
 */
s32 ixgbe_read_i2c_combined_generic_int(struct ixgbe_hw *hw, u8 addr, u16 reg,
					u16 *val, bool lock)
{
	u32 swfw_mask = hw->phy.phy_semaphore_mask;
	int max_retry = 3;
	int retry = 0;
	u8 csum_byte;
	u8 high_bits;
	u8 low_bits;
	u8 reg_high;
	u8 csum;

	reg_high = ((reg >> 7) & 0xFE) | 1;	/* Indicate read combined */
	csum = ixgbe_ones_comp_byte_add(reg_high, reg & 0xFF);
	csum = ~csum;
	do {
		if (lock && hw->mac.ops.acquire_swfw_sync(hw, swfw_mask))
			return IXGBE_ERR_SWFW_SYNC;
		ixgbe_i2c_start(hw);
		/* Device Address and write indication */
		if (ixgbe_out_i2c_byte_ack(hw, addr))
			goto fail;
		/* Write bits 14:8 */
		if (ixgbe_out_i2c_byte_ack(hw, reg_high))
			goto fail;
		/* Write bits 7:0 */
		if (ixgbe_out_i2c_byte_ack(hw, reg & 0xFF))
			goto fail;
		/* Write csum */
		if (ixgbe_out_i2c_byte_ack(hw, csum))
			goto fail;
		/* Re-start condition */
		ixgbe_i2c_start(hw);
		/* Device Address and read indication */
		if (ixgbe_out_i2c_byte_ack(hw, addr | 1))
			goto fail;
		/* Get upper bits */
		if (ixgbe_in_i2c_byte_ack(hw, &high_bits))
			goto fail;
		/* Get low bits */
		if (ixgbe_in_i2c_byte_ack(hw, &low_bits))
			goto fail;
		/* Get csum */
		ixgbe_clock_in_i2c_byte(hw, &csum_byte);
		/* NACK */
		if (ixgbe_clock_out_i2c_bit(hw, false))
			goto fail;
		ixgbe_i2c_stop(hw);
		if (lock)
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		*val = (high_bits << 8) | low_bits;
		return 0;

fail:
		ixgbe_i2c_bus_clear(hw);
		if (lock)
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		if (retry < max_retry)
			DEBUGOUT("I2C byte read combined error - Retrying.\n");
		else
			DEBUGOUT("I2C byte read combined error.\n");
		retry++;
	} while (retry <= max_retry);

	return IXGBE_ERR_I2C;
}

/**
 * ixgbe_write_i2c_combined_generic_int - Perform I2C write combined operation
 * @hw: pointer to the hardware structure
 * @addr: I2C bus address to write to
 * @reg: I2C device register to write to
 * @val: value to write
 * @lock: true if to take and release semaphore
 *
 * Returns an error code on error.
 */
s32 ixgbe_write_i2c_combined_generic_int(struct ixgbe_hw *hw, u8 addr, u16 reg,
					 u16 val, bool lock)
{
	u32 swfw_mask = hw->phy.phy_semaphore_mask;
	int max_retry = 1;
	int retry = 0;
	u8 reg_high;
	u8 csum;

	reg_high = (reg >> 7) & 0xFE;	/* Indicate write combined */
	csum = ixgbe_ones_comp_byte_add(reg_high, reg & 0xFF);
	csum = ixgbe_ones_comp_byte_add(csum, val >> 8);
	csum = ixgbe_ones_comp_byte_add(csum, val & 0xFF);
	csum = ~csum;
	do {
		if (lock && hw->mac.ops.acquire_swfw_sync(hw, swfw_mask))
			return IXGBE_ERR_SWFW_SYNC;
		ixgbe_i2c_start(hw);
		/* Device Address and write indication */
		if (ixgbe_out_i2c_byte_ack(hw, addr))
			goto fail;
		/* Write bits 14:8 */
		if (ixgbe_out_i2c_byte_ack(hw, reg_high))
			goto fail;
		/* Write bits 7:0 */
		if (ixgbe_out_i2c_byte_ack(hw, reg & 0xFF))
			goto fail;
		/* Write data 15:8 */
		if (ixgbe_out_i2c_byte_ack(hw, val >> 8))
			goto fail;
		/* Write data 7:0 */
		if (ixgbe_out_i2c_byte_ack(hw, val & 0xFF))
			goto fail;
		/* Write csum */
		if (ixgbe_out_i2c_byte_ack(hw, csum))
			goto fail;
		ixgbe_i2c_stop(hw);
		if (lock)
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		return 0;

fail:
		ixgbe_i2c_bus_clear(hw);
		if (lock)
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		if (retry < max_retry)
			DEBUGOUT("I2C byte write combined error - Retrying.\n");
		else
			DEBUGOUT("I2C byte write combined error.\n");
		retry++;
	} while (retry <= max_retry);

	return IXGBE_ERR_I2C;
}

/**
 * ixgbe_init_phy_ops_generic - Inits PHY function ptrs
 * @hw: pointer to the hardware structure
 *
 * Initialize the function pointers.
 **/
s32 ixgbe_init_phy_ops_generic(struct ixgbe_hw *hw)
{
	struct ixgbe_phy_info *phy = &hw->phy;

	DEBUGFUNC("ixgbe_init_phy_ops_generic");

	/* PHY */
	phy->ops.identify = ixgbe_identify_phy_generic;
	phy->ops.reset = ixgbe_reset_phy_generic;
	phy->ops.read_reg = ixgbe_read_phy_reg_generic;
	phy->ops.write_reg = ixgbe_write_phy_reg_generic;
	phy->ops.read_reg_mdi = ixgbe_read_phy_reg_mdi;
	phy->ops.write_reg_mdi = ixgbe_write_phy_reg_mdi;
	phy->ops.setup_link = ixgbe_setup_phy_link_generic;
	phy->ops.setup_link_speed = ixgbe_setup_phy_link_speed_generic;
	phy->ops.check_link = NULL;
	phy->ops.get_firmware_version = ixgbe_get_phy_firmware_version_generic;
	phy->ops.read_i2c_byte = ixgbe_read_i2c_byte_generic;
	phy->ops.write_i2c_byte = ixgbe_write_i2c_byte_generic;
	phy->ops.read_i2c_sff8472 = ixgbe_read_i2c_sff8472_generic;
	phy->ops.read_i2c_eeprom = ixgbe_read_i2c_eeprom_generic;
	phy->ops.write_i2c_eeprom = ixgbe_write_i2c_eeprom_generic;
	phy->ops.i2c_bus_clear = ixgbe_i2c_bus_clear;
	phy->ops.identify_sfp = ixgbe_identify_module_generic;
	phy->sfp_type = ixgbe_sfp_type_unknown;
	phy->ops.read_i2c_byte_unlocked = ixgbe_read_i2c_byte_generic_unlocked;
	phy->ops.write_i2c_byte_unlocked =
				ixgbe_write_i2c_byte_generic_unlocked;
	phy->ops.check_overtemp = ixgbe_tn_check_overtemp;
	return IXGBE_SUCCESS;
}

/**
 * ixgbe_probe_phy - Probe a single address for a PHY
 * @hw: pointer to hardware structure
 * @phy_addr: PHY address to probe
 *
 * Returns true if PHY found
 */
static bool ixgbe_probe_phy(struct ixgbe_hw *hw, u16 phy_addr)
{
	u16 ext_ability = 0;

	if (!ixgbe_validate_phy_addr(hw, phy_addr)) {
		DEBUGOUT1("Unable to validate PHY address 0x%04X\n",
			phy_addr);
		return false;
	}

	if (ixgbe_get_phy_id(hw))
		return false;

	hw->phy.type = ixgbe_get_phy_type_from_id(hw->phy.id);

	if (hw->phy.type == ixgbe_phy_unknown) {
		hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_EXT_ABILITY,
				     IXGBE_MDIO_PMA_PMD_DEV_TYPE, &ext_ability);
		if (ext_ability &
		    (IXGBE_MDIO_PHY_10GBASET_ABILITY |
		     IXGBE_MDIO_PHY_1000BASET_ABILITY))
			hw->phy.type = ixgbe_phy_cu_unknown;
		else
			hw->phy.type = ixgbe_phy_generic;
	}

	return true;
}

/**
 * ixgbe_identify_phy_generic - Get physical layer module
 * @hw: pointer to hardware structure
 *
 * Determines the physical layer module found on the current adapter.
 **/
s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
	u16 phy_addr;

	DEBUGFUNC("ixgbe_identify_phy_generic");

	if (!hw->phy.phy_semaphore_mask) {
		if (hw->bus.lan_id)
			hw->phy.phy_semaphore_mask = IXGBE_GSSR_PHY1_SM;
		else
			hw->phy.phy_semaphore_mask = IXGBE_GSSR_PHY0_SM;
	}

	if (hw->phy.type != ixgbe_phy_unknown)
		return IXGBE_SUCCESS;

	if (hw->phy.nw_mng_if_sel) {
		phy_addr = (hw->phy.nw_mng_if_sel &
			    IXGBE_NW_MNG_IF_SEL_MDIO_PHY_ADD) >>
			   IXGBE_NW_MNG_IF_SEL_MDIO_PHY_ADD_SHIFT;
		if (ixgbe_probe_phy(hw, phy_addr))
			return IXGBE_SUCCESS;
		else
			return IXGBE_ERR_PHY_ADDR_INVALID;
	}

	for (phy_addr = 0; phy_addr < IXGBE_MAX_PHY_ADDR; phy_addr++) {
		if (ixgbe_probe_phy(hw, phy_addr)) {
			status = IXGBE_SUCCESS;
			break;
		}
	}

	/* Certain media types do not have a phy so an address will not
	 * be found and the code will take this path.  Caller has to
	 * decide if it is an error or not.
	 */
	if (status != IXGBE_SUCCESS)
		hw->phy.addr = 0;

	return status;
}

/**
 * ixgbe_check_reset_blocked - check status of MNG FW veto bit
 * @hw: pointer to the hardware structure
 *
 * This function checks the MMNGC.MNG_VETO bit to see if there are
 * any constraints on link from manageability.  For MAC's that don't
 * have this bit just return faluse since the link can not be blocked
 * via this method.
 **/
s32 ixgbe_check_reset_blocked(struct ixgbe_hw *hw)
{
	u32 mmngc;

	DEBUGFUNC("ixgbe_check_reset_blocked");

	/* If we don't have this bit, it can't be blocking */
	if (hw->mac.type == ixgbe_mac_82598EB)
		return false;

	mmngc = IXGBE_READ_REG(hw, IXGBE_MMNGC);
	if (mmngc & IXGBE_MMNGC_MNG_VETO) {
		ERROR_REPORT1(IXGBE_ERROR_SOFTWARE,
			      "MNG_VETO bit detected.\n");
		return true;
	}

	return false;
}

/**
 * ixgbe_validate_phy_addr - Determines phy address is valid
 * @hw: pointer to hardware structure
 * @phy_addr: PHY address
 *
 **/
bool ixgbe_validate_phy_addr(struct ixgbe_hw *hw, u32 phy_addr)
{
	u16 phy_id = 0;
	bool valid = false;

	DEBUGFUNC("ixgbe_validate_phy_addr");

	hw->phy.addr = phy_addr;
	hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_ID_HIGH,
			     IXGBE_MDIO_PMA_PMD_DEV_TYPE, &phy_id);

	if (phy_id != 0xFFFF && phy_id != 0x0)
		valid = true;

	DEBUGOUT1("PHY ID HIGH is 0x%04X\n", phy_id);

	return valid;
}

/**
 * ixgbe_get_phy_id - Get the phy type
 * @hw: pointer to hardware structure
 *
 **/
s32 ixgbe_get_phy_id(struct ixgbe_hw *hw)
{
	u32 status;
	u16 phy_id_high = 0;
	u16 phy_id_low = 0;

	DEBUGFUNC("ixgbe_get_phy_id");

	status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_ID_HIGH,
				      IXGBE_MDIO_PMA_PMD_DEV_TYPE,
				      &phy_id_high);

	if (status == IXGBE_SUCCESS) {
		hw->phy.id = (u32)(phy_id_high << 16);
		status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_ID_LOW,
					      IXGBE_MDIO_PMA_PMD_DEV_TYPE,
					      &phy_id_low);
		hw->phy.id |= (u32)(phy_id_low & IXGBE_PHY_REVISION_MASK);
		hw->phy.revision = (u32)(phy_id_low & ~IXGBE_PHY_REVISION_MASK);
	}
	DEBUGOUT2("PHY_ID_HIGH 0x%04X, PHY_ID_LOW 0x%04X\n",
		  phy_id_high, phy_id_low);

	return status;
}

/**
 * ixgbe_get_phy_type_from_id - Get the phy type
 * @phy_id: PHY ID information
 *
 **/
enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id)
{
	enum ixgbe_phy_type phy_type;

	DEBUGFUNC("ixgbe_get_phy_type_from_id");

	switch (phy_id) {
	case TN1010_PHY_ID:
		phy_type = ixgbe_phy_tn;
		break;
	case X550_PHY_ID2:
	case X550_PHY_ID3:
	case X540_PHY_ID:
		phy_type = ixgbe_phy_aq;
		break;
	case QT2022_PHY_ID:
		phy_type = ixgbe_phy_qt;
		break;
	case ATH_PHY_ID:
		phy_type = ixgbe_phy_nl;
		break;
	case X557_PHY_ID:
	case X557_PHY_ID2:
		phy_type = ixgbe_phy_x550em_ext_t;
		break;
	case IXGBE_M88E1500_E_PHY_ID:
	case IXGBE_M88E1543_E_PHY_ID:
		phy_type = ixgbe_phy_ext_1g_t;
		break;
	default:
		phy_type = ixgbe_phy_unknown;
		break;
	}
	return phy_type;
}

/**
 * ixgbe_reset_phy_generic - Performs a PHY reset
 * @hw: pointer to hardware structure
 **/
s32 ixgbe_reset_phy_generic(struct ixgbe_hw *hw)
{
	u32 i;
	u16 ctrl = 0;
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_reset_phy_generic");

	if (hw->phy.type == ixgbe_phy_unknown)
		status = ixgbe_identify_phy_generic(hw);

	if (status != IXGBE_SUCCESS || hw->phy.type == ixgbe_phy_none)
		goto out;

	/* Don't reset PHY if it's shut down due to overtemp. */
	if (!hw->phy.reset_if_overtemp &&
	    (IXGBE_ERR_OVERTEMP == hw->phy.ops.check_overtemp(hw)))
		goto out;

	/* Blocked by MNG FW so bail */
	if (ixgbe_check_reset_blocked(hw))
		goto out;

	/*
	 * Perform soft PHY reset to the PHY_XS.
	 * This will cause a soft reset to the PHY
	 */
	hw->phy.ops.write_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
			      IXGBE_MDIO_PHY_XS_DEV_TYPE,
			      IXGBE_MDIO_PHY_XS_RESET);

	/*
	 * Poll for reset bit to self-clear indicating reset is complete.
	 * Some PHYs could take up to 3 seconds to complete and need about
	 * 1.7 usec delay after the reset is complete.
	 */
	for (i = 0; i < 30; i++) {
		msec_delay(100);
		if (hw->phy.type == ixgbe_phy_x550em_ext_t) {
			status = hw->phy.ops.read_reg(hw,
						  IXGBE_MDIO_TX_VENDOR_ALARMS_3,
						  IXGBE_MDIO_PMA_PMD_DEV_TYPE,
						  &ctrl);
			if (status != IXGBE_SUCCESS)
				return status;

			if (ctrl & IXGBE_MDIO_TX_VENDOR_ALARMS_3_RST_MASK) {
				usec_delay(2);
				break;
			}
		} else {
			status = hw->phy.ops.read_reg(hw,
						     IXGBE_MDIO_PHY_XS_CONTROL,
						     IXGBE_MDIO_PHY_XS_DEV_TYPE,
						     &ctrl);
			if (status != IXGBE_SUCCESS)
				return status;

			if (!(ctrl & IXGBE_MDIO_PHY_XS_RESET)) {
				usec_delay(2);
				break;
			}
		}
	}

	if (ctrl & IXGBE_MDIO_PHY_XS_RESET) {
		status = IXGBE_ERR_RESET_FAILED;
		ERROR_REPORT1(IXGBE_ERROR_POLLING,
			     "PHY reset polling failed to complete.\n");
	}

out:
	return status;
}

/**
 * ixgbe_restart_auto_neg - Restart auto negotiation on the PHY
 * @hw: pointer to hardware structure
 **/
void ixgbe_restart_auto_neg(struct ixgbe_hw *hw)
{
	u16 autoneg_reg;

	/* Check if PHY reset is blocked by MNG FW */
	if (ixgbe_check_reset_blocked(hw))
		return;

	/* Restart PHY auto-negotiation. */
	hw->phy.ops.read_reg(hw, IXGBE_MDIO_AUTO_NEG_CONTROL,
				IXGBE_MDIO_AUTO_NEG_DEV_TYPE, &autoneg_reg);
	autoneg_reg |= IXGBE_MII_RESTART;
	hw->phy.ops.write_reg(hw, IXGBE_MDIO_AUTO_NEG_CONTROL,
				IXGBE_MDIO_AUTO_NEG_DEV_TYPE, autoneg_reg);
}

/**
 * ixgbe_read_phy_mdi - Reads a value from a specified PHY register without
 * the SWFW lock
 * @hw: pointer to hardware structure
 * @reg_addr: 32 bit address of PHY register to read
 * @device_type: 5 bit device type
 * @phy_data: Pointer to read data from PHY register
 **/
s32 ixgbe_read_phy_reg_mdi(struct ixgbe_hw *hw, u32 reg_addr, u32 device_type,
			   u16 *phy_data)
{
	u32 i, data, command;

	/* Setup and write the address cycle command */
	command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
		   (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
		   (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
		   (IXGBE_MSCA_ADDR_CYCLE | IXGBE_MSCA_MDI_COMMAND));

	IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);

	/*
	 * Check every 10 usec to see if the address cycle completed.
	 * The MDI Command bit will clear when the operation is
	 * complete
	 */
	for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
		usec_delay(10);

		command = IXGBE_READ_REG(hw, IXGBE_MSCA);
		if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
			break;
	}


	if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
		ERROR_REPORT1(IXGBE_ERROR_POLLING, "PHY address command did not complete.\n");
		DEBUGOUT("PHY address command did not complete, returning IXGBE_ERR_PHY\n");
		return IXGBE_ERR_PHY;
	}

	/*
	 * Address cycle complete, setup and write the read
	 * command
	 */
	command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
		   (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
		   (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
		   (IXGBE_MSCA_READ | IXGBE_MSCA_MDI_COMMAND));

	IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);

	/*
	 * Check every 10 usec to see if the address cycle
	 * completed. The MDI Command bit will clear when the
	 * operation is complete
	 */
	for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
		usec_delay(10);

		command = IXGBE_READ_REG(hw, IXGBE_MSCA);
		if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
			break;
	}

	if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
		ERROR_REPORT1(IXGBE_ERROR_POLLING, "PHY read command didn't complete\n");
		DEBUGOUT("PHY read command didn't complete, returning IXGBE_ERR_PHY\n");
		return IXGBE_ERR_PHY;
	}

	/*
	 * Read operation is complete.  Get the data
	 * from MSRWD
	 */
	data = IXGBE_READ_REG(hw, IXGBE_MSRWD);
	data >>= IXGBE_MSRWD_READ_DATA_SHIFT;
	*phy_data = (u16)(data);

	return IXGBE_SUCCESS;
}

/**
 * ixgbe_read_phy_reg_generic - Reads a value from a specified PHY register
 * using the SWFW lock - this function is needed in most cases
 * @hw: pointer to hardware structure
 * @reg_addr: 32 bit address of PHY register to read
 * @device_type: 5 bit device type
 * @phy_data: Pointer to read data from PHY register
 **/
s32 ixgbe_read_phy_reg_generic(struct ixgbe_hw *hw, u32 reg_addr,
			       u32 device_type, u16 *phy_data)
{
	s32 status;
	u32 gssr = hw->phy.phy_semaphore_mask;

	DEBUGFUNC("ixgbe_read_phy_reg_generic");

	if (hw->mac.ops.acquire_swfw_sync(hw, gssr))
		return IXGBE_ERR_SWFW_SYNC;

	status = hw->phy.ops.read_reg_mdi(hw, reg_addr, device_type, phy_data);

	hw->mac.ops.release_swfw_sync(hw, gssr);

	return status;
}

/**
 * ixgbe_write_phy_reg_mdi - Writes a value to specified PHY register
 * without SWFW lock
 * @hw: pointer to hardware structure
 * @reg_addr: 32 bit PHY register to write
 * @device_type: 5 bit device type
 * @phy_data: Data to write to the PHY register
 **/
s32 ixgbe_write_phy_reg_mdi(struct ixgbe_hw *hw, u32 reg_addr,
				u32 device_type, u16 phy_data)
{
	u32 i, command;

	/* Put the data in the MDI single read and write data register*/
	IXGBE_WRITE_REG(hw, IXGBE_MSRWD, (u32)phy_data);

	/* Setup and write the address cycle command */
	command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
		   (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
		   (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
		   (IXGBE_MSCA_ADDR_CYCLE | IXGBE_MSCA_MDI_COMMAND));

	IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);

	/*
	 * Check every 10 usec to see if the address cycle completed.
	 * The MDI Command bit will clear when the operation is
	 * complete
	 */
	for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
		usec_delay(10);

		command = IXGBE_READ_REG(hw, IXGBE_MSCA);
		if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
			break;
	}

	if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
		ERROR_REPORT1(IXGBE_ERROR_POLLING, "PHY address cmd didn't complete\n");
		return IXGBE_ERR_PHY;
	}

	/*
	 * Address cycle complete, setup and write the write
	 * command
	 */
	command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT)  |
		   (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
		   (hw->phy.addr << IXGBE_MSCA_PHY_ADDR_SHIFT) |
		   (IXGBE_MSCA_WRITE | IXGBE_MSCA_MDI_COMMAND));

	IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);

	/*
	 * Check every 10 usec to see if the address cycle
	 * completed. The MDI Command bit will clear when the
	 * operation is complete
	 */
	for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
		usec_delay(10);

		command = IXGBE_READ_REG(hw, IXGBE_MSCA);
		if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
			break;
	}

	if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
		ERROR_REPORT1(IXGBE_ERROR_POLLING, "PHY write cmd didn't complete\n");
		return IXGBE_ERR_PHY;
	}

	return IXGBE_SUCCESS;
}

/**
 * ixgbe_write_phy_reg_generic - Writes a value to specified PHY register
 * using SWFW lock- this function is needed in most cases
 * @hw: pointer to hardware structure
 * @reg_addr: 32 bit PHY register to write
 * @device_type: 5 bit device type
 * @phy_data: Data to write to the PHY register
 **/
s32 ixgbe_write_phy_reg_generic(struct ixgbe_hw *hw, u32 reg_addr,
				u32 device_type, u16 phy_data)
{
	s32 status;
	u32 gssr = hw->phy.phy_semaphore_mask;

	DEBUGFUNC("ixgbe_write_phy_reg_generic");

	if (hw->mac.ops.acquire_swfw_sync(hw, gssr) == IXGBE_SUCCESS) {
		status = hw->phy.ops.write_reg_mdi(hw, reg_addr, device_type,
						 phy_data);
		hw->mac.ops.release_swfw_sync(hw, gssr);
	} else {
		status = IXGBE_ERR_SWFW_SYNC;
	}

	return status;
}

/**
 * ixgbe_setup_phy_link_generic - Set and restart auto-neg
 * @hw: pointer to hardware structure
 *
 * Restart auto-negotiation and PHY and waits for completion.
 **/
s32 ixgbe_setup_phy_link_generic(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_SUCCESS;
	u16 autoneg_reg = IXGBE_MII_AUTONEG_REG;
	bool autoneg = false;
	ixgbe_link_speed speed;

	DEBUGFUNC("ixgbe_setup_phy_link_generic");

	ixgbe_get_copper_link_capabilities_generic(hw, &speed, &autoneg);

	/* Set or unset auto-negotiation 10G advertisement */
	hw->phy.ops.read_reg(hw, IXGBE_MII_10GBASE_T_AUTONEG_CTRL_REG,
			     IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
			     &autoneg_reg);

	autoneg_reg &= ~IXGBE_MII_10GBASE_T_ADVERTISE;
	if ((hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_10GB_FULL) &&
	    (speed & IXGBE_LINK_SPEED_10GB_FULL))
		autoneg_reg |= IXGBE_MII_10GBASE_T_ADVERTISE;

	hw->phy.ops.write_reg(hw, IXGBE_MII_10GBASE_T_AUTONEG_CTRL_REG,
			      IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
			      autoneg_reg);

	hw->phy.ops.read_reg(hw, IXGBE_MII_AUTONEG_VENDOR_PROVISION_1_REG,
			     IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
			     &autoneg_reg);

	if (hw->mac.type == ixgbe_mac_X550) {
		/* Set or unset auto-negotiation 5G advertisement */
		autoneg_reg &= ~IXGBE_MII_5GBASE_T_ADVERTISE;
		if ((hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_5GB_FULL) &&
		    (speed & IXGBE_LINK_SPEED_5GB_FULL))
			autoneg_reg |= IXGBE_MII_5GBASE_T_ADVERTISE;

		/* Set or unset auto-negotiation 2.5G advertisement */
		autoneg_reg &= ~IXGBE_MII_2_5GBASE_T_ADVERTISE;
		if ((hw->phy.autoneg_advertised &
		     IXGBE_LINK_SPEED_2_5GB_FULL) &&
		    (speed & IXGBE_LINK_SPEED_2_5GB_FULL))
			autoneg_reg |= IXGBE_MII_2_5GBASE_T_ADVERTISE;
	}

	/* Set or unset auto-negotiation 1G advertisement */
	autoneg_reg &= ~IXGBE_MII_1GBASE_T_ADVERTISE;
	if ((hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_1GB_FULL) &&
	    (speed & IXGBE_LINK_SPEED_1GB_FULL))
		autoneg_reg |= IXGBE_MII_1GBASE_T_ADVERTISE;

	hw->phy.ops.write_reg(hw, IXGBE_MII_AUTONEG_VENDOR_PROVISION_1_REG,
			      IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
			      autoneg_reg);

	/* Set or unset auto-negotiation 100M advertisement */
	hw->phy.ops.read_reg(hw, IXGBE_MII_AUTONEG_ADVERTISE_REG,
			     IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
			     &autoneg_reg);

	autoneg_reg &= ~(IXGBE_MII_100BASE_T_ADVERTISE |
			 IXGBE_MII_100BASE_T_ADVERTISE_HALF);
	if ((hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_100_FULL) &&
	    (speed & IXGBE_LINK_SPEED_100_FULL))
		autoneg_reg |= IXGBE_MII_100BASE_T_ADVERTISE;

	hw->phy.ops.write_reg(hw, IXGBE_MII_AUTONEG_ADVERTISE_REG,
			      IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
			      autoneg_reg);

	ixgbe_restart_auto_neg(hw);
	return status;
}

/**
 * ixgbe_setup_phy_link_speed_generic - Sets the auto advertised capabilities
 * @hw: pointer to hardware structure
 * @speed: new link speed
 * @autoneg_wait_to_complete: unused
 **/
s32 ixgbe_setup_phy_link_speed_generic(struct ixgbe_hw *hw,
				       ixgbe_link_speed speed,
				       bool autoneg_wait_to_complete)
{
	UNREFERENCED_1PARAMETER(autoneg_wait_to_complete);

	DEBUGFUNC("ixgbe_setup_phy_link_speed_generic");

	/*
	 * Clear autoneg_advertised and set new values based on input link
	 * speed.
	 */
	hw->phy.autoneg_advertised = 0;

	if (speed & IXGBE_LINK_SPEED_10GB_FULL)
		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;

	if (speed & IXGBE_LINK_SPEED_5GB_FULL)
		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_5GB_FULL;

	if (speed & IXGBE_LINK_SPEED_2_5GB_FULL)
		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_2_5GB_FULL;

	if (speed & IXGBE_LINK_SPEED_1GB_FULL)
		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;

	if (speed & IXGBE_LINK_SPEED_100_FULL)
		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_100_FULL;

	if (speed & IXGBE_LINK_SPEED_10_FULL)
		hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10_FULL;

	/* Setup link based on the new speed settings */
	ixgbe_setup_phy_link(hw);

	return IXGBE_SUCCESS;
}

/**
 * ixgbe_get_copper_speeds_supported - Get copper link speeds from phy
 * @hw: pointer to hardware structure
 *
 * Determines the supported link capabilities by reading the PHY auto
 * negotiation register.
 **/
static s32 ixgbe_get_copper_speeds_supported(struct ixgbe_hw *hw)
{
	s32 status;
	u16 speed_ability;

	status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_SPEED_ABILITY,
				      IXGBE_MDIO_PMA_PMD_DEV_TYPE,
				      &speed_ability);
	if (status)
		return status;

	if (speed_ability & IXGBE_MDIO_PHY_SPEED_10G)
		hw->phy.speeds_supported |= IXGBE_LINK_SPEED_10GB_FULL;
	if (speed_ability & IXGBE_MDIO_PHY_SPEED_1G)
		hw->phy.speeds_supported |= IXGBE_LINK_SPEED_1GB_FULL;
	if (speed_ability & IXGBE_MDIO_PHY_SPEED_100M)
		hw->phy.speeds_supported |= IXGBE_LINK_SPEED_100_FULL;

	switch (hw->mac.type) {
	case ixgbe_mac_X550EM_x:
	case ixgbe_mac_X550EM_a:
		hw->phy.speeds_supported &= ~IXGBE_LINK_SPEED_100_FULL;
		break;
	default:
		break;
	}

	return status;
}

/**
 * ixgbe_get_copper_link_capabilities_generic - Determines link capabilities
 * @hw: pointer to hardware structure
 * @speed: pointer to link speed
 * @autoneg: boolean auto-negotiation value
 **/
s32 ixgbe_get_copper_link_capabilities_generic(struct ixgbe_hw *hw,
					       ixgbe_link_speed *speed,
					       bool *autoneg)
{
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_get_copper_link_capabilities_generic");

	*autoneg = true;
	if (!hw->phy.speeds_supported)
		status = ixgbe_get_copper_speeds_supported(hw);

	*speed = hw->phy.speeds_supported;
	return status;
}

/**
 * ixgbe_check_phy_link_tnx - Determine link and speed status
 * @hw: pointer to hardware structure
 * @speed: current link speed
 * @link_up: true is link is up, false otherwise
 *
 * Reads the VS1 register to determine if link is up and the current speed for
 * the PHY.
 **/
s32 ixgbe_check_phy_link_tnx(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
			     bool *link_up)
{
	s32 status = IXGBE_SUCCESS;
	u32 time_out;
	u32 max_time_out = 10;
	u16 phy_link = 0;
	u16 phy_speed = 0;
	u16 phy_data = 0;

	DEBUGFUNC("ixgbe_check_phy_link_tnx");

	/* Initialize speed and link to default case */
	*link_up = false;
	*speed = IXGBE_LINK_SPEED_10GB_FULL;

	/*
	 * Check current speed and link status of the PHY register.
	 * This is a vendor specific register and may have to
	 * be changed for other copper PHYs.
	 */
	for (time_out = 0; time_out < max_time_out; time_out++) {
		usec_delay(10);
		status = hw->phy.ops.read_reg(hw,
					IXGBE_MDIO_VENDOR_SPECIFIC_1_STATUS,
					IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
					&phy_data);
		phy_link = phy_data & IXGBE_MDIO_VENDOR_SPECIFIC_1_LINK_STATUS;
		phy_speed = phy_data &
				 IXGBE_MDIO_VENDOR_SPECIFIC_1_SPEED_STATUS;
		if (phy_link == IXGBE_MDIO_VENDOR_SPECIFIC_1_LINK_STATUS) {
			*link_up = true;
			if (phy_speed ==
			    IXGBE_MDIO_VENDOR_SPECIFIC_1_SPEED_STATUS)
				*speed = IXGBE_LINK_SPEED_1GB_FULL;
			break;
		}
	}

	return status;
}

/**
 *	ixgbe_setup_phy_link_tnx - Set and restart auto-neg
 *	@hw: pointer to hardware structure
 *
 *	Restart auto-negotiation and PHY and waits for completion.
 **/
s32 ixgbe_setup_phy_link_tnx(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_SUCCESS;
	u16 autoneg_reg = IXGBE_MII_AUTONEG_REG;
	bool autoneg = false;
	ixgbe_link_speed speed;

	DEBUGFUNC("ixgbe_setup_phy_link_tnx");

	ixgbe_get_copper_link_capabilities_generic(hw, &speed, &autoneg);

	if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
		/* Set or unset auto-negotiation 10G advertisement */
		hw->phy.ops.read_reg(hw, IXGBE_MII_10GBASE_T_AUTONEG_CTRL_REG,
				     IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
				     &autoneg_reg);

		autoneg_reg &= ~IXGBE_MII_10GBASE_T_ADVERTISE;
		if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_10GB_FULL)
			autoneg_reg |= IXGBE_MII_10GBASE_T_ADVERTISE;

		hw->phy.ops.write_reg(hw, IXGBE_MII_10GBASE_T_AUTONEG_CTRL_REG,
				      IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
				      autoneg_reg);
	}

	if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
		/* Set or unset auto-negotiation 1G advertisement */
		hw->phy.ops.read_reg(hw, IXGBE_MII_AUTONEG_XNP_TX_REG,
				     IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
				     &autoneg_reg);

		autoneg_reg &= ~IXGBE_MII_1GBASE_T_ADVERTISE_XNP_TX;
		if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_1GB_FULL)
			autoneg_reg |= IXGBE_MII_1GBASE_T_ADVERTISE_XNP_TX;

		hw->phy.ops.write_reg(hw, IXGBE_MII_AUTONEG_XNP_TX_REG,
				      IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
				      autoneg_reg);
	}

	if (speed & IXGBE_LINK_SPEED_100_FULL) {
		/* Set or unset auto-negotiation 100M advertisement */
		hw->phy.ops.read_reg(hw, IXGBE_MII_AUTONEG_ADVERTISE_REG,
				     IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
				     &autoneg_reg);

		autoneg_reg &= ~IXGBE_MII_100BASE_T_ADVERTISE;
		if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_100_FULL)
			autoneg_reg |= IXGBE_MII_100BASE_T_ADVERTISE;

		hw->phy.ops.write_reg(hw, IXGBE_MII_AUTONEG_ADVERTISE_REG,
				      IXGBE_MDIO_AUTO_NEG_DEV_TYPE,
				      autoneg_reg);
	}

	ixgbe_restart_auto_neg(hw);
	return status;
}

/**
 * ixgbe_get_phy_firmware_version_tnx - Gets the PHY Firmware Version
 * @hw: pointer to hardware structure
 * @firmware_version: pointer to the PHY Firmware Version
 **/
s32 ixgbe_get_phy_firmware_version_tnx(struct ixgbe_hw *hw,
				       u16 *firmware_version)
{
	s32 status;

	DEBUGFUNC("ixgbe_get_phy_firmware_version_tnx");

	status = hw->phy.ops.read_reg(hw, TNX_FW_REV,
				      IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
				      firmware_version);

	return status;
}

/**
 * ixgbe_get_phy_firmware_version_generic - Gets the PHY Firmware Version
 * @hw: pointer to hardware structure
 * @firmware_version: pointer to the PHY Firmware Version
 **/
s32 ixgbe_get_phy_firmware_version_generic(struct ixgbe_hw *hw,
					   u16 *firmware_version)
{
	s32 status;

	DEBUGFUNC("ixgbe_get_phy_firmware_version_generic");

	status = hw->phy.ops.read_reg(hw, AQ_FW_REV,
				      IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
				      firmware_version);

	return status;
}

/**
 * ixgbe_reset_phy_nl - Performs a PHY reset
 * @hw: pointer to hardware structure
 **/
s32 ixgbe_reset_phy_nl(struct ixgbe_hw *hw)
{
	u16 phy_offset, control, eword, edata, block_crc;
	bool end_data = false;
	u16 list_offset, data_offset;
	u16 phy_data = 0;
	s32 ret_val = IXGBE_SUCCESS;
	u32 i;

	DEBUGFUNC("ixgbe_reset_phy_nl");

	/* Blocked by MNG FW so bail */
	if (ixgbe_check_reset_blocked(hw))
		goto out;

	hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
			     IXGBE_MDIO_PHY_XS_DEV_TYPE, &phy_data);

	/* reset the PHY and poll for completion */
	hw->phy.ops.write_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
			      IXGBE_MDIO_PHY_XS_DEV_TYPE,
			      (phy_data | IXGBE_MDIO_PHY_XS_RESET));

	for (i = 0; i < 100; i++) {
		hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
				     IXGBE_MDIO_PHY_XS_DEV_TYPE, &phy_data);
		if ((phy_data & IXGBE_MDIO_PHY_XS_RESET) == 0)
			break;
		msec_delay(10);
	}

	if ((phy_data & IXGBE_MDIO_PHY_XS_RESET) != 0) {
		DEBUGOUT("PHY reset did not complete.\n");
		ret_val = IXGBE_ERR_PHY;
		goto out;
	}

	/* Get init offsets */
	ret_val = ixgbe_get_sfp_init_sequence_offsets(hw, &list_offset,
						      &data_offset);
	if (ret_val != IXGBE_SUCCESS)
		goto out;

	ret_val = hw->eeprom.ops.read(hw, data_offset, &block_crc);
	data_offset++;
	while (!end_data) {
		/*
		 * Read control word from PHY init contents offset
		 */
		ret_val = hw->eeprom.ops.read(hw, data_offset, &eword);
		if (ret_val)
			goto err_eeprom;
		control = (eword & IXGBE_CONTROL_MASK_NL) >>
			   IXGBE_CONTROL_SHIFT_NL;
		edata = eword & IXGBE_DATA_MASK_NL;
		switch (control) {
		case IXGBE_DELAY_NL:
			data_offset++;
			DEBUGOUT1("DELAY: %d MS\n", edata);
			msec_delay(edata);
			break;
		case IXGBE_DATA_NL:
			DEBUGOUT("DATA:\n");
			data_offset++;
			ret_val = hw->eeprom.ops.read(hw, data_offset,
						      &phy_offset);
			if (ret_val)
				goto err_eeprom;
			data_offset++;
			for (i = 0; i < edata; i++) {
				ret_val = hw->eeprom.ops.read(hw, data_offset,
							      &eword);
				if (ret_val)
					goto err_eeprom;
				hw->phy.ops.write_reg(hw, phy_offset,
						      IXGBE_TWINAX_DEV, eword);
				DEBUGOUT2("Wrote %4.4x to %4.4x\n", eword,
					  phy_offset);
				data_offset++;
				phy_offset++;
			}
			break;
		case IXGBE_CONTROL_NL:
			data_offset++;
			DEBUGOUT("CONTROL:\n");
			if (edata == IXGBE_CONTROL_EOL_NL) {
				DEBUGOUT("EOL\n");
				end_data = true;
			} else if (edata == IXGBE_CONTROL_SOL_NL) {
				DEBUGOUT("SOL\n");
			} else {
				DEBUGOUT("Bad control value\n");
				ret_val = IXGBE_ERR_PHY;
				goto out;
			}
			break;
		default:
			DEBUGOUT("Bad control type\n");
			ret_val = IXGBE_ERR_PHY;
			goto out;
		}
	}

out:
	return ret_val;

err_eeprom:
	ERROR_REPORT2(IXGBE_ERROR_INVALID_STATE,
		      "eeprom read at offset %d failed", data_offset);
	return IXGBE_ERR_PHY;
}

/**
 * ixgbe_identify_module_generic - Identifies module type
 * @hw: pointer to hardware structure
 *
 * Determines HW type and calls appropriate function.
 **/
s32 ixgbe_identify_module_generic(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_ERR_SFP_NOT_PRESENT;

	DEBUGFUNC("ixgbe_identify_module_generic");

	switch (hw->mac.ops.get_media_type(hw)) {
	case ixgbe_media_type_fiber:
		status = ixgbe_identify_sfp_module_generic(hw);
		break;

	case ixgbe_media_type_fiber_qsfp:
		status = ixgbe_identify_qsfp_module_generic(hw);
		break;

	default:
		hw->phy.sfp_type = ixgbe_sfp_type_not_present;
		status = IXGBE_ERR_SFP_NOT_PRESENT;
		break;
	}

	return status;
}

/**
 * ixgbe_identify_sfp_module_generic - Identifies SFP modules
 * @hw: pointer to hardware structure
 *
 * Searches for and identifies the SFP module and assigns appropriate PHY type.
 **/
s32 ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
	u32 vendor_oui = 0;
	enum ixgbe_sfp_type stored_sfp_type = hw->phy.sfp_type;
	u8 identifier = 0;
	u8 comp_codes_1g = 0;
	u8 comp_codes_10g = 0;
	u8 oui_bytes[3] = {0, 0, 0};
	u8 cable_tech = 0;
	u8 cable_spec = 0;
	u16 enforce_sfp = 0;

	DEBUGFUNC("ixgbe_identify_sfp_module_generic");

	if (hw->mac.ops.get_media_type(hw) != ixgbe_media_type_fiber) {
		hw->phy.sfp_type = ixgbe_sfp_type_not_present;
		status = IXGBE_ERR_SFP_NOT_PRESENT;
		goto out;
	}

	/* LAN ID is needed for I2C access */
	hw->mac.ops.set_lan_id(hw);

	status = hw->phy.ops.read_i2c_eeprom(hw,
					     IXGBE_SFF_IDENTIFIER,
					     &identifier);

	if (status != IXGBE_SUCCESS)
		goto err_read_i2c_eeprom;

	if (identifier != IXGBE_SFF_IDENTIFIER_SFP) {
		hw->phy.type = ixgbe_phy_sfp_unsupported;
		status = IXGBE_ERR_SFP_NOT_SUPPORTED;
	} else {
		status = hw->phy.ops.read_i2c_eeprom(hw,
						     IXGBE_SFF_1GBE_COMP_CODES,
						     &comp_codes_1g);

		if (status != IXGBE_SUCCESS)
			goto err_read_i2c_eeprom;

		status = hw->phy.ops.read_i2c_eeprom(hw,
						     IXGBE_SFF_10GBE_COMP_CODES,
						     &comp_codes_10g);

		if (status != IXGBE_SUCCESS)
			goto err_read_i2c_eeprom;
		status = hw->phy.ops.read_i2c_eeprom(hw,
						     IXGBE_SFF_CABLE_TECHNOLOGY,
						     &cable_tech);

		if (status != IXGBE_SUCCESS)
			goto err_read_i2c_eeprom;

		 /* ID Module
		  * =========
		  * 0   SFP_DA_CU
		  * 1   SFP_SR
		  * 2   SFP_LR
		  * 3   SFP_DA_CORE0 - 82599-specific
		  * 4   SFP_DA_CORE1 - 82599-specific
		  * 5   SFP_SR/LR_CORE0 - 82599-specific
		  * 6   SFP_SR/LR_CORE1 - 82599-specific
		  * 7   SFP_act_lmt_DA_CORE0 - 82599-specific
		  * 8   SFP_act_lmt_DA_CORE1 - 82599-specific
		  * 9   SFP_1g_cu_CORE0 - 82599-specific
		  * 10  SFP_1g_cu_CORE1 - 82599-specific
		  * 11  SFP_1g_sx_CORE0 - 82599-specific
		  * 12  SFP_1g_sx_CORE1 - 82599-specific
		  */
		if (hw->mac.type == ixgbe_mac_82598EB) {
			if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE)
				hw->phy.sfp_type = ixgbe_sfp_type_da_cu;
			else if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
				hw->phy.sfp_type = ixgbe_sfp_type_sr;
			else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
				hw->phy.sfp_type = ixgbe_sfp_type_lr;
			else
				hw->phy.sfp_type = ixgbe_sfp_type_unknown;
		} else {
			if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE) {
				if (hw->bus.lan_id == 0)
					hw->phy.sfp_type =
						     ixgbe_sfp_type_da_cu_core0;
				else
					hw->phy.sfp_type =
						     ixgbe_sfp_type_da_cu_core1;
			} else if (cable_tech & IXGBE_SFF_DA_ACTIVE_CABLE) {
				hw->phy.ops.read_i2c_eeprom(
						hw, IXGBE_SFF_CABLE_SPEC_COMP,
						&cable_spec);
				if (cable_spec &
				    IXGBE_SFF_DA_SPEC_ACTIVE_LIMITING) {
					if (hw->bus.lan_id == 0)
						hw->phy.sfp_type =
						ixgbe_sfp_type_da_act_lmt_core0;
					else
						hw->phy.sfp_type =
						ixgbe_sfp_type_da_act_lmt_core1;
				} else {
					hw->phy.sfp_type =
							ixgbe_sfp_type_unknown;
				}
			} else if (comp_codes_10g &
				   (IXGBE_SFF_10GBASESR_CAPABLE |
				    IXGBE_SFF_10GBASELR_CAPABLE)) {
				if (hw->bus.lan_id == 0)
					hw->phy.sfp_type =
						      ixgbe_sfp_type_srlr_core0;
				else
					hw->phy.sfp_type =
						      ixgbe_sfp_type_srlr_core1;
			} else if (comp_codes_1g & IXGBE_SFF_1GBASET_CAPABLE) {
				if (hw->bus.lan_id == 0)
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_cu_core0;
				else
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_cu_core1;
			} else if (comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE) {
				if (hw->bus.lan_id == 0)
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_sx_core0;
				else
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_sx_core1;
			} else if (comp_codes_1g & IXGBE_SFF_1GBASELX_CAPABLE) {
				if (hw->bus.lan_id == 0)
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_lx_core0;
				else
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_lx_core1;
			} else if (comp_codes_1g & IXGBE_SFF_1GBASELHA_CAPABLE) {
				if (hw->bus.lan_id == 0)
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_lha_core0;
				else
					hw->phy.sfp_type =
						ixgbe_sfp_type_1g_lha_core1;
			} else {
				hw->phy.sfp_type = ixgbe_sfp_type_unknown;
			}
		}

		if (hw->phy.sfp_type != stored_sfp_type)
			hw->phy.sfp_setup_needed = true;

		/* Determine if the SFP+ PHY is dual speed or not. */
		hw->phy.multispeed_fiber = false;
		if (((comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE) &&
		   (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)) ||
		   ((comp_codes_1g & IXGBE_SFF_1GBASELX_CAPABLE) &&
		   (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)))
			hw->phy.multispeed_fiber = true;

		/* Determine PHY vendor */
		if (hw->phy.type != ixgbe_phy_nl) {
			hw->phy.id = identifier;
			status = hw->phy.ops.read_i2c_eeprom(hw,
						    IXGBE_SFF_VENDOR_OUI_BYTE0,
						    &oui_bytes[0]);

			if (status != IXGBE_SUCCESS)
				goto err_read_i2c_eeprom;

			status = hw->phy.ops.read_i2c_eeprom(hw,
						    IXGBE_SFF_VENDOR_OUI_BYTE1,
						    &oui_bytes[1]);

			if (status != IXGBE_SUCCESS)
				goto err_read_i2c_eeprom;

			status = hw->phy.ops.read_i2c_eeprom(hw,
						    IXGBE_SFF_VENDOR_OUI_BYTE2,
						    &oui_bytes[2]);

			if (status != IXGBE_SUCCESS)
				goto err_read_i2c_eeprom;

			vendor_oui =
			  ((oui_bytes[0] << IXGBE_SFF_VENDOR_OUI_BYTE0_SHIFT) |
			   (oui_bytes[1] << IXGBE_SFF_VENDOR_OUI_BYTE1_SHIFT) |
			   (oui_bytes[2] << IXGBE_SFF_VENDOR_OUI_BYTE2_SHIFT));

			switch (vendor_oui) {
			case IXGBE_SFF_VENDOR_OUI_TYCO:
				if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE)
					hw->phy.type =
						    ixgbe_phy_sfp_passive_tyco;
				break;
			case IXGBE_SFF_VENDOR_OUI_FTL:
				if (cable_tech & IXGBE_SFF_DA_ACTIVE_CABLE)
					hw->phy.type = ixgbe_phy_sfp_ftl_active;
				else
					hw->phy.type = ixgbe_phy_sfp_ftl;
				break;
			case IXGBE_SFF_VENDOR_OUI_AVAGO:
				hw->phy.type = ixgbe_phy_sfp_avago;
				break;
			case IXGBE_SFF_VENDOR_OUI_INTEL:
				hw->phy.type = ixgbe_phy_sfp_intel;
				break;
			default:
				if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE)
					hw->phy.type =
						 ixgbe_phy_sfp_passive_unknown;
				else if (cable_tech & IXGBE_SFF_DA_ACTIVE_CABLE)
					hw->phy.type =
						ixgbe_phy_sfp_active_unknown;
				else
					hw->phy.type = ixgbe_phy_sfp_unknown;
				break;
			}
		}

		/* Allow any DA cable vendor */
		if (cable_tech & (IXGBE_SFF_DA_PASSIVE_CABLE |
		    IXGBE_SFF_DA_ACTIVE_CABLE)) {
			status = IXGBE_SUCCESS;
			goto out;
		}

		/* Verify supported 1G SFP modules */
		if (comp_codes_10g == 0 &&
		    !(hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core1 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lha_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lha_core1 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lx_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lx_core1 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_sx_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_sx_core1)) {
			hw->phy.type = ixgbe_phy_sfp_unsupported;
			status = IXGBE_ERR_SFP_NOT_SUPPORTED;
			goto out;
		}

		/* Anything else 82598-based is supported */
		if (hw->mac.type == ixgbe_mac_82598EB) {
			status = IXGBE_SUCCESS;
			goto out;
		}

		ixgbe_get_device_caps(hw, &enforce_sfp);
		if (!(enforce_sfp & IXGBE_DEVICE_CAPS_ALLOW_ANY_SFP) &&
		    !(hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core1 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lha_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lha_core1 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lx_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_lx_core1 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_sx_core0 ||
		      hw->phy.sfp_type == ixgbe_sfp_type_1g_sx_core1)) {
			/* Make sure we're a supported PHY type */
			if (hw->phy.type == ixgbe_phy_sfp_intel) {
				status = IXGBE_SUCCESS;
			} else {
				if (hw->allow_unsupported_sfp == true) {
					EWARN(hw,
						"WARNING: Intel (R) Network Connections are quality tested using Intel (R) Ethernet Optics. "
						"Using untested modules is not supported and may cause unstable operation or damage to the module or the adapter. "
						"Intel Corporation is not responsible for any harm caused by using untested modules.\n");
					status = IXGBE_SUCCESS;
				} else {
					DEBUGOUT("SFP+ module not supported\n");
					hw->phy.type =
						ixgbe_phy_sfp_unsupported;
					status = IXGBE_ERR_SFP_NOT_SUPPORTED;
				}
			}
		} else {
			status = IXGBE_SUCCESS;
		}
	}

out:
	return status;

err_read_i2c_eeprom:
	hw->phy.sfp_type = ixgbe_sfp_type_not_present;
	if (hw->phy.type != ixgbe_phy_nl) {
		hw->phy.id = 0;
		hw->phy.type = ixgbe_phy_unknown;
	}
	return IXGBE_ERR_SFP_NOT_PRESENT;
}

/**
 * ixgbe_get_supported_phy_sfp_layer_generic - Returns physical layer type
 * @hw: pointer to hardware structure
 *
 * Determines physical layer capabilities of the current SFP.
 */
u64 ixgbe_get_supported_phy_sfp_layer_generic(struct ixgbe_hw *hw)
{
	u64 physical_layer = IXGBE_PHYSICAL_LAYER_UNKNOWN;
	u8 comp_codes_10g = 0;
	u8 comp_codes_1g = 0;

	DEBUGFUNC("ixgbe_get_supported_phy_sfp_layer_generic");

	hw->phy.ops.identify_sfp(hw);
	if (hw->phy.sfp_type == ixgbe_sfp_type_not_present)
		return physical_layer;

	switch (hw->phy.type) {
	case ixgbe_phy_sfp_passive_tyco:
	case ixgbe_phy_sfp_passive_unknown:
	case ixgbe_phy_qsfp_passive_unknown:
		physical_layer = IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU;
		break;
	case ixgbe_phy_sfp_ftl_active:
	case ixgbe_phy_sfp_active_unknown:
	case ixgbe_phy_qsfp_active_unknown:
		physical_layer = IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA;
		break;
	case ixgbe_phy_sfp_avago:
	case ixgbe_phy_sfp_ftl:
	case ixgbe_phy_sfp_intel:
	case ixgbe_phy_sfp_unknown:
		hw->phy.ops.read_i2c_eeprom(hw,
		      IXGBE_SFF_1GBE_COMP_CODES, &comp_codes_1g);
		hw->phy.ops.read_i2c_eeprom(hw,
		      IXGBE_SFF_10GBE_COMP_CODES, &comp_codes_10g);
		if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
			physical_layer = IXGBE_PHYSICAL_LAYER_10GBASE_SR;
		else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
			physical_layer = IXGBE_PHYSICAL_LAYER_10GBASE_LR;
		else if (comp_codes_1g & IXGBE_SFF_1GBASET_CAPABLE)
			physical_layer = IXGBE_PHYSICAL_LAYER_1000BASE_T;
		else if (comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE)
			physical_layer = IXGBE_PHYSICAL_LAYER_1000BASE_SX;
		break;
	case ixgbe_phy_qsfp_intel:
	case ixgbe_phy_qsfp_unknown:
		hw->phy.ops.read_i2c_eeprom(hw,
		      IXGBE_SFF_QSFP_10GBE_COMP, &comp_codes_10g);
		if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
			physical_layer = IXGBE_PHYSICAL_LAYER_10GBASE_SR;
		else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
			physical_layer = IXGBE_PHYSICAL_LAYER_10GBASE_LR;
		break;
	default:
		break;
	}

	return physical_layer;
}

/**
 * ixgbe_identify_qsfp_module_generic - Identifies QSFP modules
 * @hw: pointer to hardware structure
 *
 * Searches for and identifies the QSFP module and assigns appropriate PHY type
 **/
s32 ixgbe_identify_qsfp_module_generic(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
	u32 vendor_oui = 0;
	enum ixgbe_sfp_type stored_sfp_type = hw->phy.sfp_type;
	u8 identifier = 0;
	u8 comp_codes_1g = 0;
	u8 comp_codes_10g = 0;
	u8 oui_bytes[3] = {0, 0, 0};
	u16 enforce_sfp = 0;
	u8 connector = 0;
	u8 cable_length = 0;
	u8 device_tech = 0;
	bool active_cable = false;

	DEBUGFUNC("ixgbe_identify_qsfp_module_generic");

	if (hw->mac.ops.get_media_type(hw) != ixgbe_media_type_fiber_qsfp) {
		hw->phy.sfp_type = ixgbe_sfp_type_not_present;
		status = IXGBE_ERR_SFP_NOT_PRESENT;
		goto out;
	}

	/* LAN ID is needed for I2C access */
	hw->mac.ops.set_lan_id(hw);

	status = hw->phy.ops.read_i2c_eeprom(hw, IXGBE_SFF_IDENTIFIER,
					     &identifier);

	if (status != IXGBE_SUCCESS)
		goto err_read_i2c_eeprom;

	if (identifier != IXGBE_SFF_IDENTIFIER_QSFP_PLUS) {
		hw->phy.type = ixgbe_phy_sfp_unsupported;
		status = IXGBE_ERR_SFP_NOT_SUPPORTED;
		goto out;
	}

	hw->phy.id = identifier;

	status = hw->phy.ops.read_i2c_eeprom(hw, IXGBE_SFF_QSFP_10GBE_COMP,
					     &comp_codes_10g);

	if (status != IXGBE_SUCCESS)
		goto err_read_i2c_eeprom;

	status = hw->phy.ops.read_i2c_eeprom(hw, IXGBE_SFF_QSFP_1GBE_COMP,
					     &comp_codes_1g);

	if (status != IXGBE_SUCCESS)
		goto err_read_i2c_eeprom;

	if (comp_codes_10g & IXGBE_SFF_QSFP_DA_PASSIVE_CABLE) {
		hw->phy.type = ixgbe_phy_qsfp_passive_unknown;
		if (hw->bus.lan_id == 0)
			hw->phy.sfp_type = ixgbe_sfp_type_da_cu_core0;
		else
			hw->phy.sfp_type = ixgbe_sfp_type_da_cu_core1;
	} else if (comp_codes_10g & (IXGBE_SFF_10GBASESR_CAPABLE |
				     IXGBE_SFF_10GBASELR_CAPABLE)) {
		if (hw->bus.lan_id == 0)
			hw->phy.sfp_type = ixgbe_sfp_type_srlr_core0;
		else
			hw->phy.sfp_type = ixgbe_sfp_type_srlr_core1;
	} else {
		if (comp_codes_10g & IXGBE_SFF_QSFP_DA_ACTIVE_CABLE)
			active_cable = true;

		if (!active_cable) {
			/* check for active DA cables that pre-date
			 * SFF-8436 v3.6 */
			hw->phy.ops.read_i2c_eeprom(hw,
					IXGBE_SFF_QSFP_CONNECTOR,
					&connector);

			hw->phy.ops.read_i2c_eeprom(hw,
					IXGBE_SFF_QSFP_CABLE_LENGTH,
					&cable_length);

			hw->phy.ops.read_i2c_eeprom(hw,
					IXGBE_SFF_QSFP_DEVICE_TECH,
					&device_tech);

			if ((connector ==
				     IXGBE_SFF_QSFP_CONNECTOR_NOT_SEPARABLE) &&
			    (cable_length > 0) &&
			    ((device_tech >> 4) ==
				     IXGBE_SFF_QSFP_TRANSMITER_850NM_VCSEL))
				active_cable = true;
		}

		if (active_cable) {
			hw->phy.type = ixgbe_phy_qsfp_active_unknown;
			if (hw->bus.lan_id == 0)
				hw->phy.sfp_type =
						ixgbe_sfp_type_da_act_lmt_core0;
			else
				hw->phy.sfp_type =
						ixgbe_sfp_type_da_act_lmt_core1;
		} else {
			/* unsupported module type */
			hw->phy.type = ixgbe_phy_sfp_unsupported;
			status = IXGBE_ERR_SFP_NOT_SUPPORTED;
			goto out;
		}
	}

	if (hw->phy.sfp_type != stored_sfp_type)
		hw->phy.sfp_setup_needed = true;

	/* Determine if the QSFP+ PHY is dual speed or not. */
	hw->phy.multispeed_fiber = false;
	if (((comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE) &&
	   (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)) ||
	   ((comp_codes_1g & IXGBE_SFF_1GBASELX_CAPABLE) &&
	   (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)))
		hw->phy.multispeed_fiber = true;

	/* Determine PHY vendor for optical modules */
	if (comp_codes_10g & (IXGBE_SFF_10GBASESR_CAPABLE |
			      IXGBE_SFF_10GBASELR_CAPABLE))  {
		status = hw->phy.ops.read_i2c_eeprom(hw,
					    IXGBE_SFF_QSFP_VENDOR_OUI_BYTE0,
					    &oui_bytes[0]);

		if (status != IXGBE_SUCCESS)
			goto err_read_i2c_eeprom;

		status = hw->phy.ops.read_i2c_eeprom(hw,
					    IXGBE_SFF_QSFP_VENDOR_OUI_BYTE1,
					    &oui_bytes[1]);

		if (status != IXGBE_SUCCESS)
			goto err_read_i2c_eeprom;

		status = hw->phy.ops.read_i2c_eeprom(hw,
					    IXGBE_SFF_QSFP_VENDOR_OUI_BYTE2,
					    &oui_bytes[2]);

		if (status != IXGBE_SUCCESS)
			goto err_read_i2c_eeprom;

		vendor_oui =
		  ((oui_bytes[0] << IXGBE_SFF_VENDOR_OUI_BYTE0_SHIFT) |
		   (oui_bytes[1] << IXGBE_SFF_VENDOR_OUI_BYTE1_SHIFT) |
		   (oui_bytes[2] << IXGBE_SFF_VENDOR_OUI_BYTE2_SHIFT));

		if (vendor_oui == IXGBE_SFF_VENDOR_OUI_INTEL)
			hw->phy.type = ixgbe_phy_qsfp_intel;
		else
			hw->phy.type = ixgbe_phy_qsfp_unknown;

		ixgbe_get_device_caps(hw, &enforce_sfp);
		if (!(enforce_sfp & IXGBE_DEVICE_CAPS_ALLOW_ANY_SFP)) {
			/* Make sure we're a supported PHY type */
			if (hw->phy.type == ixgbe_phy_qsfp_intel) {
				status = IXGBE_SUCCESS;
			} else {
				if (hw->allow_unsupported_sfp == true) {
					EWARN(hw,
						"WARNING: Intel (R) Network Connections are quality tested using Intel (R) Ethernet Optics. "
						"Using untested modules is not supported and may cause unstable operation or damage to the module or the adapter. "
						"Intel Corporation is not responsible for any harm caused by using untested modules.\n");
					status = IXGBE_SUCCESS;
				} else {
					DEBUGOUT("QSFP module not supported\n");
					hw->phy.type =
						ixgbe_phy_sfp_unsupported;
					status = IXGBE_ERR_SFP_NOT_SUPPORTED;
				}
			}
		} else {
			status = IXGBE_SUCCESS;
		}
	}

out:
	return status;

err_read_i2c_eeprom:
	hw->phy.sfp_type = ixgbe_sfp_type_not_present;
	hw->phy.id = 0;
	hw->phy.type = ixgbe_phy_unknown;

	return IXGBE_ERR_SFP_NOT_PRESENT;
}

/**
 * ixgbe_get_sfp_init_sequence_offsets - Provides offset of PHY init sequence
 * @hw: pointer to hardware structure
 * @list_offset: offset to the SFP ID list
 * @data_offset: offset to the SFP data block
 *
 * Checks the MAC's EEPROM to see if it supports a given SFP+ module type, if
 * so it returns the offsets to the phy init sequence block.
 **/
s32 ixgbe_get_sfp_init_sequence_offsets(struct ixgbe_hw *hw,
					u16 *list_offset,
					u16 *data_offset)
{
	u16 sfp_id;
	u16 sfp_type = hw->phy.sfp_type;

	DEBUGFUNC("ixgbe_get_sfp_init_sequence_offsets");

	if (hw->phy.sfp_type == ixgbe_sfp_type_unknown)
		return IXGBE_ERR_SFP_NOT_SUPPORTED;

	if (hw->phy.sfp_type == ixgbe_sfp_type_not_present)
		return IXGBE_ERR_SFP_NOT_PRESENT;

	if ((hw->device_id == IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM) &&
	    (hw->phy.sfp_type == ixgbe_sfp_type_da_cu))
		return IXGBE_ERR_SFP_NOT_SUPPORTED;

	/*
	 * Limiting active cables and 1G Phys must be initialized as
	 * SR modules
	 */
	if (sfp_type == ixgbe_sfp_type_da_act_lmt_core0 ||
	    sfp_type == ixgbe_sfp_type_1g_lx_core0 ||
	    sfp_type == ixgbe_sfp_type_1g_lha_core0 ||
	    sfp_type == ixgbe_sfp_type_1g_cu_core0 ||
	    sfp_type == ixgbe_sfp_type_1g_sx_core0)
		sfp_type = ixgbe_sfp_type_srlr_core0;
	else if (sfp_type == ixgbe_sfp_type_da_act_lmt_core1 ||
		 sfp_type == ixgbe_sfp_type_1g_lx_core1 ||
		 sfp_type == ixgbe_sfp_type_1g_lha_core1 ||
		 sfp_type == ixgbe_sfp_type_1g_cu_core1 ||
		 sfp_type == ixgbe_sfp_type_1g_sx_core1)
		sfp_type = ixgbe_sfp_type_srlr_core1;

	/* Read offset to PHY init contents */
	if (hw->eeprom.ops.read(hw, IXGBE_PHY_INIT_OFFSET_NL, list_offset)) {
		ERROR_REPORT2(IXGBE_ERROR_INVALID_STATE,
			      "eeprom read at offset %d failed",
			      IXGBE_PHY_INIT_OFFSET_NL);
		return IXGBE_ERR_SFP_NO_INIT_SEQ_PRESENT;
	}

	if ((!*list_offset) || (*list_offset == 0xFFFF))
		return IXGBE_ERR_SFP_NO_INIT_SEQ_PRESENT;

	/* Shift offset to first ID word */
	(*list_offset)++;

	/*
	 * Find the matching SFP ID in the EEPROM
	 * and program the init sequence
	 */
	if (hw->eeprom.ops.read(hw, *list_offset, &sfp_id))
		goto err_phy;

	while (sfp_id != IXGBE_PHY_INIT_END_NL) {
		if (sfp_id == sfp_type) {
			(*list_offset)++;
			if (hw->eeprom.ops.read(hw, *list_offset, data_offset))
				goto err_phy;
			if ((!*data_offset) || (*data_offset == 0xFFFF)) {
				DEBUGOUT("SFP+ module not supported\n");
				return IXGBE_ERR_SFP_NOT_SUPPORTED;
			} else {
				break;
			}
		} else {
			(*list_offset) += 2;
			if (hw->eeprom.ops.read(hw, *list_offset, &sfp_id))
				goto err_phy;
		}
	}

	if (sfp_id == IXGBE_PHY_INIT_END_NL) {
		DEBUGOUT("No matching SFP+ module found\n");
		return IXGBE_ERR_SFP_NOT_SUPPORTED;
	}

	return IXGBE_SUCCESS;

err_phy:
	ERROR_REPORT2(IXGBE_ERROR_INVALID_STATE,
		      "eeprom read at offset %d failed", *list_offset);
	return IXGBE_ERR_PHY;
}

/**
 * ixgbe_read_i2c_eeprom_generic - Reads 8 bit EEPROM word over I2C interface
 * @hw: pointer to hardware structure
 * @byte_offset: EEPROM byte offset to read
 * @eeprom_data: value read
 *
 * Performs byte read operation to SFP module's EEPROM over I2C interface.
 **/
s32 ixgbe_read_i2c_eeprom_generic(struct ixgbe_hw *hw, u8 byte_offset,
				  u8 *eeprom_data)
{
	DEBUGFUNC("ixgbe_read_i2c_eeprom_generic");

	return hw->phy.ops.read_i2c_byte(hw, byte_offset,
					 IXGBE_I2C_EEPROM_DEV_ADDR,
					 eeprom_data);
}

/**
 * ixgbe_read_i2c_sff8472_generic - Reads 8 bit word over I2C interface
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset at address 0xA2
 * @sff8472_data: value read
 *
 * Performs byte read operation to SFP module's SFF-8472 data over I2C
 **/
STATIC s32 ixgbe_read_i2c_sff8472_generic(struct ixgbe_hw *hw, u8 byte_offset,
					  u8 *sff8472_data)
{
	return hw->phy.ops.read_i2c_byte(hw, byte_offset,
					 IXGBE_I2C_EEPROM_DEV_ADDR2,
					 sff8472_data);
}

/**
 * ixgbe_write_i2c_eeprom_generic - Writes 8 bit EEPROM word over I2C interface
 * @hw: pointer to hardware structure
 * @byte_offset: EEPROM byte offset to write
 * @eeprom_data: value to write
 *
 * Performs byte write operation to SFP module's EEPROM over I2C interface.
 **/
s32 ixgbe_write_i2c_eeprom_generic(struct ixgbe_hw *hw, u8 byte_offset,
				   u8 eeprom_data)
{
	DEBUGFUNC("ixgbe_write_i2c_eeprom_generic");

	return hw->phy.ops.write_i2c_byte(hw, byte_offset,
					  IXGBE_I2C_EEPROM_DEV_ADDR,
					  eeprom_data);
}

/**
 * ixgbe_is_sfp_probe - Returns true if SFP is being detected
 * @hw: pointer to hardware structure
 * @offset: eeprom offset to be read
 * @addr: I2C address to be read
 */
STATIC bool ixgbe_is_sfp_probe(struct ixgbe_hw *hw, u8 offset, u8 addr)
{
	if (addr == IXGBE_I2C_EEPROM_DEV_ADDR &&
	    offset == IXGBE_SFF_IDENTIFIER &&
	    hw->phy.sfp_type == ixgbe_sfp_type_not_present)
		return true;
	return false;
}

/**
 * ixgbe_read_i2c_byte_generic_int - Reads 8 bit word over I2C
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset to read
 * @dev_addr: address to read from
 * @data: value read
 * @lock: true if to take and release semaphore
 *
 * Performs byte read operation to SFP module's EEPROM over I2C interface at
 * a specified device address.
 **/
STATIC s32 ixgbe_read_i2c_byte_generic_int(struct ixgbe_hw *hw, u8 byte_offset,
					   u8 dev_addr, u8 *data, bool lock)
{
	s32 status;
	u32 max_retry = 10;
	u32 retry = 0;
	u32 swfw_mask = hw->phy.phy_semaphore_mask;
	bool nack = 1;
	*data = 0;

	DEBUGFUNC("ixgbe_read_i2c_byte_generic");

	if (hw->mac.type >= ixgbe_mac_X550)
		max_retry = 3;
	if (ixgbe_is_sfp_probe(hw, byte_offset, dev_addr))
		max_retry = IXGBE_SFP_DETECT_RETRIES;

	do {
		if (lock && hw->mac.ops.acquire_swfw_sync(hw, swfw_mask))
			return IXGBE_ERR_SWFW_SYNC;

		ixgbe_i2c_start(hw);

		/* Device Address and write indication */
		status = ixgbe_clock_out_i2c_byte(hw, dev_addr);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_get_i2c_ack(hw);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_clock_out_i2c_byte(hw, byte_offset);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_get_i2c_ack(hw);
		if (status != IXGBE_SUCCESS)
			goto fail;

		ixgbe_i2c_start(hw);

		/* Device Address and read indication */
		status = ixgbe_clock_out_i2c_byte(hw, (dev_addr | 0x1));
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_get_i2c_ack(hw);
		if (status != IXGBE_SUCCESS)
			goto fail;

		ixgbe_clock_in_i2c_byte(hw, data);

		status = ixgbe_clock_out_i2c_bit(hw, nack);
		if (status != IXGBE_SUCCESS)
			goto fail;

		ixgbe_i2c_stop(hw);
		if (lock)
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		return IXGBE_SUCCESS;

fail:
		ixgbe_i2c_bus_clear(hw);
		if (lock) {
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
			msec_delay(100);
		}
		if (retry < max_retry)
			DEBUGOUT("I2C byte read error - Retrying.\n");
		else
			DEBUGOUT("I2C byte read error.\n");
		retry++;
	} while (retry <= max_retry);

	return status;
}

/**
 * ixgbe_read_i2c_byte_generic - Reads 8 bit word over I2C
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset to read
 * @dev_addr: address to read from
 * @data: value read
 *
 * Performs byte read operation to SFP module's EEPROM over I2C interface at
 * a specified device address.
 **/
s32 ixgbe_read_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
				u8 dev_addr, u8 *data)
{
	return ixgbe_read_i2c_byte_generic_int(hw, byte_offset, dev_addr,
					       data, true);
}

/**
 * ixgbe_read_i2c_byte_generic_unlocked - Reads 8 bit word over I2C
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset to read
 * @dev_addr: address to read from
 * @data: value read
 *
 * Performs byte read operation to SFP module's EEPROM over I2C interface at
 * a specified device address.
 **/
s32 ixgbe_read_i2c_byte_generic_unlocked(struct ixgbe_hw *hw, u8 byte_offset,
					 u8 dev_addr, u8 *data)
{
	return ixgbe_read_i2c_byte_generic_int(hw, byte_offset, dev_addr,
					       data, false);
}

/**
 * ixgbe_write_i2c_byte_generic_int - Writes 8 bit word over I2C
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset to write
 * @dev_addr: address to write to
 * @data: value to write
 * @lock: true if to take and release semaphore
 *
 * Performs byte write operation to SFP module's EEPROM over I2C interface at
 * a specified device address.
 **/
STATIC s32 ixgbe_write_i2c_byte_generic_int(struct ixgbe_hw *hw, u8 byte_offset,
					    u8 dev_addr, u8 data, bool lock)
{
	s32 status;
	u32 max_retry = 1;
	u32 retry = 0;
	u32 swfw_mask = hw->phy.phy_semaphore_mask;

	DEBUGFUNC("ixgbe_write_i2c_byte_generic");

	if (lock && hw->mac.ops.acquire_swfw_sync(hw, swfw_mask) !=
	    IXGBE_SUCCESS)
		return IXGBE_ERR_SWFW_SYNC;

	do {
		ixgbe_i2c_start(hw);

		status = ixgbe_clock_out_i2c_byte(hw, dev_addr);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_get_i2c_ack(hw);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_clock_out_i2c_byte(hw, byte_offset);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_get_i2c_ack(hw);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_clock_out_i2c_byte(hw, data);
		if (status != IXGBE_SUCCESS)
			goto fail;

		status = ixgbe_get_i2c_ack(hw);
		if (status != IXGBE_SUCCESS)
			goto fail;

		ixgbe_i2c_stop(hw);
		if (lock)
			hw->mac.ops.release_swfw_sync(hw, swfw_mask);
		return IXGBE_SUCCESS;

fail:
		ixgbe_i2c_bus_clear(hw);
		if (retry < max_retry)
			DEBUGOUT("I2C byte write error - Retrying.\n");
		else
			DEBUGOUT("I2C byte write error.\n");
		retry++;
	} while (retry <= max_retry);

	if (lock)
		hw->mac.ops.release_swfw_sync(hw, swfw_mask);

	return status;
}

/**
 * ixgbe_write_i2c_byte_generic - Writes 8 bit word over I2C
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset to write
 * @dev_addr: address to write to
 * @data: value to write
 *
 * Performs byte write operation to SFP module's EEPROM over I2C interface at
 * a specified device address.
 **/
s32 ixgbe_write_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
				 u8 dev_addr, u8 data)
{
	return ixgbe_write_i2c_byte_generic_int(hw, byte_offset, dev_addr,
						data, true);
}

/**
 * ixgbe_write_i2c_byte_generic_unlocked - Writes 8 bit word over I2C
 * @hw: pointer to hardware structure
 * @byte_offset: byte offset to write
 * @dev_addr: address to write to
 * @data: value to write
 *
 * Performs byte write operation to SFP module's EEPROM over I2C interface at
 * a specified device address.
 **/
s32 ixgbe_write_i2c_byte_generic_unlocked(struct ixgbe_hw *hw, u8 byte_offset,
					  u8 dev_addr, u8 data)
{
	return ixgbe_write_i2c_byte_generic_int(hw, byte_offset, dev_addr,
						data, false);
}

/**
 * ixgbe_i2c_start - Sets I2C start condition
 * @hw: pointer to hardware structure
 *
 * Sets I2C start condition (High -> Low on SDA while SCL is High)
 * Set bit-bang mode on X550 hardware.
 **/
STATIC void ixgbe_i2c_start(struct ixgbe_hw *hw)
{
	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));

	DEBUGFUNC("ixgbe_i2c_start");

	i2cctl |= IXGBE_I2C_BB_EN_BY_MAC(hw);

	/* Start condition must begin with data and clock high */
	ixgbe_set_i2c_data(hw, &i2cctl, 1);
	ixgbe_raise_i2c_clk(hw, &i2cctl);

	/* Setup time for start condition (4.7us) */
	usec_delay(IXGBE_I2C_T_SU_STA);

	ixgbe_set_i2c_data(hw, &i2cctl, 0);

	/* Hold time for start condition (4us) */
	usec_delay(IXGBE_I2C_T_HD_STA);

	ixgbe_lower_i2c_clk(hw, &i2cctl);

	/* Minimum low period of clock is 4.7 us */
	usec_delay(IXGBE_I2C_T_LOW);

}

/**
 * ixgbe_i2c_stop - Sets I2C stop condition
 * @hw: pointer to hardware structure
 *
 * Sets I2C stop condition (Low -> High on SDA while SCL is High)
 * Disables bit-bang mode and negates data output enable on X550
 * hardware.
 **/
STATIC void ixgbe_i2c_stop(struct ixgbe_hw *hw)
{
	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
	u32 data_oe_bit = IXGBE_I2C_DATA_OE_N_EN_BY_MAC(hw);
	u32 clk_oe_bit = IXGBE_I2C_CLK_OE_N_EN_BY_MAC(hw);
	u32 bb_en_bit = IXGBE_I2C_BB_EN_BY_MAC(hw);

	DEBUGFUNC("ixgbe_i2c_stop");

	/* Stop condition must begin with data low and clock high */
	ixgbe_set_i2c_data(hw, &i2cctl, 0);
	ixgbe_raise_i2c_clk(hw, &i2cctl);

	/* Setup time for stop condition (4us) */
	usec_delay(IXGBE_I2C_T_SU_STO);

	ixgbe_set_i2c_data(hw, &i2cctl, 1);

	/* bus free time between stop and start (4.7us)*/
	usec_delay(IXGBE_I2C_T_BUF);

	if (bb_en_bit || data_oe_bit || clk_oe_bit) {
		i2cctl &= ~bb_en_bit;
		i2cctl |= data_oe_bit | clk_oe_bit;
		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), i2cctl);
		IXGBE_WRITE_FLUSH(hw);
	}
}

/**
 * ixgbe_clock_in_i2c_byte - Clocks in one byte via I2C
 * @hw: pointer to hardware structure
 * @data: data byte to clock in
 *
 * Clocks in one byte data via I2C data/clock
 **/
STATIC void ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data)
{
	s32 i;
	bool bit = 0;

	DEBUGFUNC("ixgbe_clock_in_i2c_byte");

	*data = 0;
	for (i = 7; i >= 0; i--) {
		ixgbe_clock_in_i2c_bit(hw, &bit);
		*data |= bit << i;
	}
}

/**
 * ixgbe_clock_out_i2c_byte - Clocks out one byte via I2C
 * @hw: pointer to hardware structure
 * @data: data byte clocked out
 *
 * Clocks out one byte data via I2C data/clock
 **/
STATIC s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data)
{
	s32 status = IXGBE_SUCCESS;
	s32 i;
	u32 i2cctl;
	bool bit;

	DEBUGFUNC("ixgbe_clock_out_i2c_byte");

	for (i = 7; i >= 0; i--) {
		bit = (data >> i) & 0x1;
		status = ixgbe_clock_out_i2c_bit(hw, bit);

		if (status != IXGBE_SUCCESS)
			break;
	}

	/* Release SDA line (set high) */
	i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
	i2cctl |= IXGBE_I2C_DATA_OUT_BY_MAC(hw);
	i2cctl |= IXGBE_I2C_DATA_OE_N_EN_BY_MAC(hw);
	IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), i2cctl);
	IXGBE_WRITE_FLUSH(hw);

	return status;
}

/**
 * ixgbe_get_i2c_ack - Polls for I2C ACK
 * @hw: pointer to hardware structure
 *
 * Clocks in/out one bit via I2C data/clock
 **/
STATIC s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw)
{
	u32 data_oe_bit = IXGBE_I2C_DATA_OE_N_EN_BY_MAC(hw);
	s32 status = IXGBE_SUCCESS;
	u32 i = 0;
	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
	u32 timeout = 10;
	bool ack = 1;

	DEBUGFUNC("ixgbe_get_i2c_ack");

	if (data_oe_bit) {
		i2cctl |= IXGBE_I2C_DATA_OUT_BY_MAC(hw);
		i2cctl |= data_oe_bit;
		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), i2cctl);
		IXGBE_WRITE_FLUSH(hw);
	}
	ixgbe_raise_i2c_clk(hw, &i2cctl);

	/* Minimum high period of clock is 4us */
	usec_delay(IXGBE_I2C_T_HIGH);

	/* Poll for ACK.  Note that ACK in I2C spec is
	 * transition from 1 to 0 */
	for (i = 0; i < timeout; i++) {
		i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
		ack = ixgbe_get_i2c_data(hw, &i2cctl);

		usec_delay(1);
		if (!ack)
			break;
	}

	if (ack) {
		DEBUGOUT("I2C ack was not received.\n");
		status = IXGBE_ERR_I2C;
	}

	ixgbe_lower_i2c_clk(hw, &i2cctl);

	/* Minimum low period of clock is 4.7 us */
	usec_delay(IXGBE_I2C_T_LOW);

	return status;
}

/**
 * ixgbe_clock_in_i2c_bit - Clocks in one bit via I2C data/clock
 * @hw: pointer to hardware structure
 * @data: read data value
 *
 * Clocks in one bit via I2C data/clock
 **/
STATIC void ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data)
{
	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
	u32 data_oe_bit = IXGBE_I2C_DATA_OE_N_EN_BY_MAC(hw);

	DEBUGFUNC("ixgbe_clock_in_i2c_bit");

	if (data_oe_bit) {
		i2cctl |= IXGBE_I2C_DATA_OUT_BY_MAC(hw);
		i2cctl |= data_oe_bit;
		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), i2cctl);
		IXGBE_WRITE_FLUSH(hw);
	}
	ixgbe_raise_i2c_clk(hw, &i2cctl);

	/* Minimum high period of clock is 4us */
	usec_delay(IXGBE_I2C_T_HIGH);

	i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
	*data = ixgbe_get_i2c_data(hw, &i2cctl);

	ixgbe_lower_i2c_clk(hw, &i2cctl);

	/* Minimum low period of clock is 4.7 us */
	usec_delay(IXGBE_I2C_T_LOW);
}

/**
 * ixgbe_clock_out_i2c_bit - Clocks in/out one bit via I2C data/clock
 * @hw: pointer to hardware structure
 * @data: data value to write
 *
 * Clocks out one bit via I2C data/clock
 **/
STATIC s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data)
{
	s32 status;
	u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));

	DEBUGFUNC("ixgbe_clock_out_i2c_bit");

	status = ixgbe_set_i2c_data(hw, &i2cctl, data);
	if (status == IXGBE_SUCCESS) {
		ixgbe_raise_i2c_clk(hw, &i2cctl);

		/* Minimum high period of clock is 4us */
		usec_delay(IXGBE_I2C_T_HIGH);

		ixgbe_lower_i2c_clk(hw, &i2cctl);

		/* Minimum low period of clock is 4.7 us.
		 * This also takes care of the data hold time.
		 */
		usec_delay(IXGBE_I2C_T_LOW);
	} else {
		status = IXGBE_ERR_I2C;
		ERROR_REPORT2(IXGBE_ERROR_INVALID_STATE,
			     "I2C data was not set to %X\n", data);
	}

	return status;
}

/**
 * ixgbe_raise_i2c_clk - Raises the I2C SCL clock
 * @hw: pointer to hardware structure
 * @i2cctl: Current value of I2CCTL register
 *
 * Raises the I2C clock line '0'->'1'
 * Negates the I2C clock output enable on X550 hardware.
 **/
STATIC void ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
{
	u32 clk_oe_bit = IXGBE_I2C_CLK_OE_N_EN_BY_MAC(hw);
	u32 i = 0;
	u32 timeout = IXGBE_I2C_CLOCK_STRETCHING_TIMEOUT;
	u32 i2cctl_r = 0;

	DEBUGFUNC("ixgbe_raise_i2c_clk");

	if (clk_oe_bit) {
		*i2cctl |= clk_oe_bit;
		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), *i2cctl);
	}

	for (i = 0; i < timeout; i++) {
		*i2cctl |= IXGBE_I2C_CLK_OUT_BY_MAC(hw);

		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), *i2cctl);
		IXGBE_WRITE_FLUSH(hw);
		/* SCL rise time (1000ns) */
		usec_delay(IXGBE_I2C_T_RISE);

		i2cctl_r = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
		if (i2cctl_r & IXGBE_I2C_CLK_IN_BY_MAC(hw))
			break;
	}
}

/**
 * ixgbe_lower_i2c_clk - Lowers the I2C SCL clock
 * @hw: pointer to hardware structure
 * @i2cctl: Current value of I2CCTL register
 *
 * Lowers the I2C clock line '1'->'0'
 * Asserts the I2C clock output enable on X550 hardware.
 **/
STATIC void ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
{
	DEBUGFUNC("ixgbe_lower_i2c_clk");

	*i2cctl &= ~(IXGBE_I2C_CLK_OUT_BY_MAC(hw));
	*i2cctl &= ~IXGBE_I2C_CLK_OE_N_EN_BY_MAC(hw);

	IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), *i2cctl);
	IXGBE_WRITE_FLUSH(hw);

	/* SCL fall time (300ns) */
	usec_delay(IXGBE_I2C_T_FALL);
}

/**
 * ixgbe_set_i2c_data - Sets the I2C data bit
 * @hw: pointer to hardware structure
 * @i2cctl: Current value of I2CCTL register
 * @data: I2C data value (0 or 1) to set
 *
 * Sets the I2C data bit
 * Asserts the I2C data output enable on X550 hardware.
 **/
STATIC s32 ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data)
{
	u32 data_oe_bit = IXGBE_I2C_DATA_OE_N_EN_BY_MAC(hw);
	s32 status = IXGBE_SUCCESS;

	DEBUGFUNC("ixgbe_set_i2c_data");

	if (data)
		*i2cctl |= IXGBE_I2C_DATA_OUT_BY_MAC(hw);
	else
		*i2cctl &= ~(IXGBE_I2C_DATA_OUT_BY_MAC(hw));
	*i2cctl &= ~data_oe_bit;

	IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), *i2cctl);
	IXGBE_WRITE_FLUSH(hw);

	/* Data rise/fall (1000ns/300ns) and set-up time (250ns) */
	usec_delay(IXGBE_I2C_T_RISE + IXGBE_I2C_T_FALL + IXGBE_I2C_T_SU_DATA);

	if (!data)	/* Can't verify data in this case */
		return IXGBE_SUCCESS;
	if (data_oe_bit) {
		*i2cctl |= data_oe_bit;
		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), *i2cctl);
		IXGBE_WRITE_FLUSH(hw);
	}

	/* Verify data was set correctly */
	*i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));
	if (data != ixgbe_get_i2c_data(hw, i2cctl)) {
		status = IXGBE_ERR_I2C;
		ERROR_REPORT2(IXGBE_ERROR_INVALID_STATE,
			     "Error - I2C data was not set to %X.\n",
			     data);
	}

	return status;
}

/**
 * ixgbe_get_i2c_data - Reads the I2C SDA data bit
 * @hw: pointer to hardware structure
 * @i2cctl: Current value of I2CCTL register
 *
 * Returns the I2C data bit value
 * Negates the I2C data output enable on X550 hardware.
 **/
STATIC bool ixgbe_get_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl)
{
	u32 data_oe_bit = IXGBE_I2C_DATA_OE_N_EN_BY_MAC(hw);
	bool data;

	DEBUGFUNC("ixgbe_get_i2c_data");

	if (data_oe_bit) {
		*i2cctl |= data_oe_bit;
		IXGBE_WRITE_REG(hw, IXGBE_I2CCTL_BY_MAC(hw), *i2cctl);
		IXGBE_WRITE_FLUSH(hw);
		usec_delay(IXGBE_I2C_T_FALL);
	}

	if (*i2cctl & IXGBE_I2C_DATA_IN_BY_MAC(hw))
		data = 1;
	else
		data = 0;

	return data;
}

/**
 * ixgbe_i2c_bus_clear - Clears the I2C bus
 * @hw: pointer to hardware structure
 *
 * Clears the I2C bus by sending nine clock pulses.
 * Used when data line is stuck low.
 **/
void ixgbe_i2c_bus_clear(struct ixgbe_hw *hw)
{
	u32 i2cctl;
	u32 i;

	DEBUGFUNC("ixgbe_i2c_bus_clear");

	ixgbe_i2c_start(hw);
	i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL_BY_MAC(hw));

	ixgbe_set_i2c_data(hw, &i2cctl, 1);

	for (i = 0; i < 9; i++) {
		ixgbe_raise_i2c_clk(hw, &i2cctl);

		/* Min high period of clock is 4us */
		usec_delay(IXGBE_I2C_T_HIGH);

		ixgbe_lower_i2c_clk(hw, &i2cctl);

		/* Min low period of clock is 4.7us*/
		usec_delay(IXGBE_I2C_T_LOW);
	}

	ixgbe_i2c_start(hw);

	/* Put the i2c bus back to default state */
	ixgbe_i2c_stop(hw);
}

/**
 * ixgbe_tn_check_overtemp - Checks if an overtemp occurred.
 * @hw: pointer to hardware structure
 *
 * Checks if the LASI temp alarm status was triggered due to overtemp
 **/
s32 ixgbe_tn_check_overtemp(struct ixgbe_hw *hw)
{
	s32 status = IXGBE_SUCCESS;
	u16 phy_data = 0;

	DEBUGFUNC("ixgbe_tn_check_overtemp");

	if (hw->device_id != IXGBE_DEV_ID_82599_T3_LOM)
		goto out;

	/* Check that the LASI temp alarm status was triggered */
	hw->phy.ops.read_reg(hw, IXGBE_TN_LASI_STATUS_REG,
			     IXGBE_MDIO_PMA_PMD_DEV_TYPE, &phy_data);

	if (!(phy_data & IXGBE_TN_LASI_STATUS_TEMP_ALARM))
		goto out;

	status = IXGBE_ERR_OVERTEMP;
	ERROR_REPORT1(IXGBE_ERROR_CAUTION, "Device over temperature");
out:
	return status;
}

/**
 * ixgbe_set_copper_phy_power - Control power for copper phy
 * @hw: pointer to hardware structure
 * @on: true for on, false for off
 */
s32 ixgbe_set_copper_phy_power(struct ixgbe_hw *hw, bool on)
{
	u32 status;
	u16 reg;

	if (!on && ixgbe_mng_present(hw))
		return 0;

	status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_VENDOR_SPECIFIC_1_CONTROL,
				      IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
				      &reg);
	if (status)
		return status;

	if (on) {
		reg &= ~IXGBE_MDIO_PHY_SET_LOW_POWER_MODE;
	} else {
		if (ixgbe_check_reset_blocked(hw))
			return 0;
		reg |= IXGBE_MDIO_PHY_SET_LOW_POWER_MODE;
	}

	status = hw->phy.ops.write_reg(hw, IXGBE_MDIO_VENDOR_SPECIFIC_1_CONTROL,
				       IXGBE_MDIO_VENDOR_SPECIFIC_1_DEV_TYPE,
				       reg);
	return status;
}