xref: /onnv-gate/usr/src/uts/common/io/igb/igb_82575.c (revision 5779:e875a8701bfc)

/*
 * CDDL HEADER START
 *
 * Copyright(c) 2007-2008 Intel Corporation. All rights reserved.
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at:
 *	http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When using or redistributing this file, you may do so under the
 * License only. No other modification of this header is permitted.
 *
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms of the CDDL.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * e1000_82575
 * e1000_82576
 */

#include "igb_api.h"
#include "igb_82575.h"

static s32 e1000_init_phy_params_82575(struct e1000_hw *hw);
static s32 e1000_init_nvm_params_82575(struct e1000_hw *hw);
static s32 e1000_init_mac_params_82575(struct e1000_hw *hw);
static s32 e1000_acquire_phy_82575(struct e1000_hw *hw);
static void e1000_release_phy_82575(struct e1000_hw *hw);
static s32 e1000_acquire_nvm_82575(struct e1000_hw *hw);
static void e1000_release_nvm_82575(struct e1000_hw *hw);
static s32 e1000_check_for_link_82575(struct e1000_hw *hw);
static s32 e1000_get_cfg_done_82575(struct e1000_hw *hw);
static s32 e1000_get_link_up_info_82575(struct e1000_hw *hw, u16 *speed,
    u16 *duplex);
static s32 e1000_init_hw_82575(struct e1000_hw *hw);
static s32 e1000_phy_hw_reset_sgmii_82575(struct e1000_hw *hw);
static s32 e1000_read_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset,
    u16 *data);
static void e1000_rar_set_82575(struct e1000_hw *hw, u8 *addr, u32 index);
static s32 e1000_reset_hw_82575(struct e1000_hw *hw);
static s32 e1000_set_d0_lplu_state_82575(struct e1000_hw *hw,
    bool active);
static s32 e1000_setup_copper_link_82575(struct e1000_hw *hw);
static s32 e1000_setup_fiber_serdes_link_82575(struct e1000_hw *hw);
static s32 e1000_write_phy_reg_sgmii_82575(struct e1000_hw *hw,
    u32 offset, u16 data);
static void e1000_clear_hw_cntrs_82575(struct e1000_hw *hw);
static s32 e1000_acquire_swfw_sync_82575(struct e1000_hw *hw, u16 mask);
static s32 e1000_configure_pcs_link_82575(struct e1000_hw *hw);
static s32 e1000_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw,
    u16 *speed, u16 *duplex);
static s32 e1000_get_phy_id_82575(struct e1000_hw *hw);
static void e1000_release_swfw_sync_82575(struct e1000_hw *hw, u16 mask);
static bool e1000_sgmii_active_82575(struct e1000_hw *hw);
static s32 e1000_reset_init_script_82575(struct e1000_hw *hw);
static s32 e1000_read_mac_addr_82575(struct e1000_hw *hw);
static void e1000_power_down_phy_copper_82575(struct e1000_hw *hw);


struct e1000_dev_spec_82575 {
	bool sgmii_active;
};

/*
 * e1000_init_phy_params_82575 - Init PHY func ptrs.
 * @hw: pointer to the HW structure
 *
 * This is a function pointer entry point called by the api module.
 */
static s32
e1000_init_phy_params_82575(struct e1000_hw *hw)
{
	struct e1000_phy_info *phy = &hw->phy;
	struct e1000_functions *func = &hw->func;
	s32 ret_val = E1000_SUCCESS;

	DEBUGFUNC("e1000_init_phy_params_82575");

	if (hw->phy.media_type != e1000_media_type_copper) {
		phy->type = e1000_phy_none;
		goto out;
	} else {
		func->power_up_phy = e1000_power_up_phy_copper;
		func->power_down_phy = e1000_power_down_phy_copper_82575;
	}

	phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT;
	phy->reset_delay_us = 100;

	func->acquire_phy = e1000_acquire_phy_82575;
	func->check_reset_block = e1000_check_reset_block_generic;
	func->commit_phy = e1000_phy_sw_reset_generic;
	func->get_cfg_done = e1000_get_cfg_done_82575;
	func->release_phy = e1000_release_phy_82575;

	if (e1000_sgmii_active_82575(hw)) {
		func->reset_phy = e1000_phy_hw_reset_sgmii_82575;
		func->read_phy_reg = e1000_read_phy_reg_sgmii_82575;
		func->write_phy_reg = e1000_write_phy_reg_sgmii_82575;
	} else {
		func->reset_phy = e1000_phy_hw_reset_generic;
		func->read_phy_reg = e1000_read_phy_reg_igp;
		func->write_phy_reg = e1000_write_phy_reg_igp;
	}

	/* Set phy->phy_addr and phy->id. */
	ret_val = e1000_get_phy_id_82575(hw);

	/* Verify phy id and set remaining function pointers */
	switch (phy->id) {
	case M88E1111_I_PHY_ID:
		phy->type = e1000_phy_m88;
		func->check_polarity = e1000_check_polarity_m88;
		func->get_phy_info = e1000_get_phy_info_m88;
		func->get_cable_length = e1000_get_cable_length_m88;
		func->force_speed_duplex = e1000_phy_force_speed_duplex_m88;
		break;
	case IGP03E1000_E_PHY_ID:
		phy->type = e1000_phy_igp_3;
		func->check_polarity = e1000_check_polarity_igp;
		func->get_phy_info = e1000_get_phy_info_igp;
		func->get_cable_length = e1000_get_cable_length_igp_2;
		func->force_speed_duplex = e1000_phy_force_speed_duplex_igp;
		func->set_d0_lplu_state = e1000_set_d0_lplu_state_82575;
		func->set_d3_lplu_state = e1000_set_d3_lplu_state_generic;
		break;
	default:
		ret_val = -E1000_ERR_PHY;
		goto out;
	}

out:
	return (ret_val);
}

/*
 * e1000_init_nvm_params_82575 - Init NVM func ptrs.
 * @hw: pointer to the HW structure
 *
 * This is a function pointer entry point called by the api module.
 */
static s32
e1000_init_nvm_params_82575(struct e1000_hw *hw)
{
	struct e1000_nvm_info *nvm = &hw->nvm;
	struct e1000_functions *func = &hw->func;
	u32 eecd = E1000_READ_REG(hw, E1000_EECD);
	u16 size;

	DEBUGFUNC("e1000_init_nvm_params_82575");

	nvm->opcode_bits = 8;
	nvm->delay_usec = 1;
	switch (nvm->override) {
	case e1000_nvm_override_spi_large:
		nvm->page_size = 32;
		nvm->address_bits = 16;
		break;
	case e1000_nvm_override_spi_small:
		nvm->page_size = 8;
		nvm->address_bits = 8;
		break;
	default:
		nvm->page_size = eecd & E1000_EECD_ADDR_BITS ? 32 : 8;
		nvm->address_bits = eecd & E1000_EECD_ADDR_BITS ? 16 : 8;
		break;
	}

	nvm->type = e1000_nvm_eeprom_spi;

	size = (u16)((eecd & E1000_EECD_SIZE_EX_MASK) >>
	    E1000_EECD_SIZE_EX_SHIFT);

	/*
	 * Added to a constant, "size" becomes the left-shift value
	 * for setting word_size.
	 */
	size += NVM_WORD_SIZE_BASE_SHIFT;

	/* EEPROM access above 16k is unsupported */
	if (size > 14)
		size = 14;
	nvm->word_size = 1 << size;

	/* Function Pointers */
	func->acquire_nvm = e1000_acquire_nvm_82575;
	func->read_nvm = e1000_read_nvm_eerd;
	func->release_nvm = e1000_release_nvm_82575;
	func->update_nvm = e1000_update_nvm_checksum_generic;
	func->valid_led_default = e1000_valid_led_default_generic;
	func->validate_nvm = e1000_validate_nvm_checksum_generic;
	func->write_nvm = e1000_write_nvm_spi;

	return (E1000_SUCCESS);
}

/*
 * e1000_init_mac_params_82575 - Init MAC func ptrs.
 * @hw: pointer to the HW structure
 *
 * This is a function pointer entry point called by the api module.
 */
static s32
e1000_init_mac_params_82575(struct e1000_hw *hw)
{
	struct e1000_mac_info *mac = &hw->mac;
	struct e1000_functions *func = &hw->func;
	struct e1000_dev_spec_82575 *dev_spec;
	u32 ctrl_ext = 0;
	s32 ret_val = E1000_SUCCESS;

	DEBUGFUNC("e1000_init_mac_params_82575");

	hw->dev_spec_size = sizeof (struct e1000_dev_spec_82575);

	/* Device-specific structure allocation */
	ret_val = e1000_alloc_zeroed_dev_spec_struct(hw, hw->dev_spec_size);
	if (ret_val)
		goto out;

	dev_spec = (struct e1000_dev_spec_82575 *)hw->dev_spec;

	/* Set media type */
	/*
	 * The 82575 uses bits 22:23 for link mode. The mode can be changed
	 * based on the EEPROM. We cannot rely upon device ID. There
	 * is no distinguishable difference between fiber and internal
	 * SerDes mode on the 82575. There can be an external PHY attached
	 * on the SGMII interface. For this, we'll set sgmii_active to TRUE.
	 */
	hw->phy.media_type = e1000_media_type_copper;
	dev_spec->sgmii_active = FALSE;

	ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
	if ((ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK) ==
	    E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES) {
		hw->phy.media_type = e1000_media_type_internal_serdes;
		ctrl_ext |= E1000_CTRL_I2C_ENA;
	} else if (ctrl_ext & E1000_CTRL_EXT_LINK_MODE_SGMII) {
		dev_spec->sgmii_active = TRUE;
		ctrl_ext |= E1000_CTRL_I2C_ENA;
	} else {
		ctrl_ext &= ~E1000_CTRL_I2C_ENA;
	}
	E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);

	/* Set mta register count */
	mac->mta_reg_count = 128;
	/* Set rar entry count */
	mac->rar_entry_count = E1000_RAR_ENTRIES_82575;
	/* Set if part includes ASF firmware */
	mac->asf_firmware_present = TRUE;
	/* Set if manageability features are enabled. */
	mac->arc_subsystem_valid =
	    (E1000_READ_REG(hw, E1000_FWSM) & E1000_FWSM_MODE_MASK)
	    ? TRUE : FALSE;

	/* Function pointers */

	/* bus type/speed/width */
	func->get_bus_info = e1000_get_bus_info_pcie_generic;
	/* reset */
	func->reset_hw = e1000_reset_hw_82575;
	/* hw initialization */
	func->init_hw = e1000_init_hw_82575;
	/* link setup */
	func->setup_link = e1000_setup_link_generic;
	/* physical interface link setup */
	func->setup_physical_interface =
	    (hw->phy.media_type == e1000_media_type_copper)
	    ? e1000_setup_copper_link_82575
	    : e1000_setup_fiber_serdes_link_82575;
	/* check for link */
	func->check_for_link = e1000_check_for_link_82575;
	/* receive address register setting */
	func->rar_set = e1000_rar_set_82575;
	/* read mac address */
	func->read_mac_addr = e1000_read_mac_addr_82575;
	/* multicast address update */
	func->update_mc_addr_list = e1000_update_mc_addr_list_generic;
	/* writing VFTA */
	func->write_vfta = e1000_write_vfta_generic;
	/* clearing VFTA */
	func->clear_vfta = e1000_clear_vfta_generic;
	/* setting MTA */
	func->mta_set = e1000_mta_set_generic;
	/* blink LED */
	func->blink_led = e1000_blink_led_generic;
	/* setup LED */
	func->setup_led = e1000_setup_led_generic;
	/* cleanup LED */
	func->cleanup_led = e1000_cleanup_led_generic;
	/* turn on/off LED */
	func->led_on = e1000_led_on_generic;
	func->led_off = e1000_led_off_generic;
	/* remove device */
	func->remove_device = e1000_remove_device_generic;
	/* clear hardware counters */
	func->clear_hw_cntrs = e1000_clear_hw_cntrs_82575;
	/* link info */
	func->get_link_up_info = e1000_get_link_up_info_82575;

out:
	return (ret_val);
}

/*
 * e1000_init_function_pointers_82575 - Init func ptrs.
 * @hw: pointer to the HW structure
 *
 * The only function explicitly called by the api module to initialize
 * all function pointers and parameters.
 */
void
e1000_init_function_pointers_82575(struct e1000_hw *hw)
{
	DEBUGFUNC("e1000_init_function_pointers_82575");

	hw->func.init_mac_params = e1000_init_mac_params_82575;
	hw->func.init_nvm_params = e1000_init_nvm_params_82575;
	hw->func.init_phy_params = e1000_init_phy_params_82575;
}

/*
 * e1000_acquire_phy_82575 - Acquire rights to access PHY
 * @hw: pointer to the HW structure
 *
 * Acquire access rights to the correct PHY.  This is a
 * function pointer entry point called by the api module.
 */
static s32
e1000_acquire_phy_82575(struct e1000_hw *hw)
{
	u16 mask;

	DEBUGFUNC("e1000_acquire_phy_82575");

	mask = hw->bus.func ? E1000_SWFW_PHY1_SM : E1000_SWFW_PHY0_SM;

	return (e1000_acquire_swfw_sync_82575(hw, mask));
}

/*
 * e1000_release_phy_82575 - Release rights to access PHY
 * @hw: pointer to the HW structure
 *
 * A wrapper to release access rights to the correct PHY.  This is a
 * function pointer entry point called by the api module.
 */
static void
e1000_release_phy_82575(struct e1000_hw *hw)
{
	u16 mask;

	DEBUGFUNC("e1000_release_phy_82575");

	mask = hw->bus.func ? E1000_SWFW_PHY1_SM : E1000_SWFW_PHY0_SM;
	e1000_release_swfw_sync_82575(hw, mask);
}

/*
 * e1000_read_phy_reg_sgmii_82575 - Read PHY register using sgmii
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Reads the PHY register at offset using the serial gigabit media independent
 * interface and stores the retrieved information in data.
 */
static s32
e1000_read_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset, u16 *data)
{
	struct e1000_phy_info *phy = &hw->phy;
	u32 i, i2ccmd = 0;

	DEBUGFUNC("e1000_read_phy_reg_sgmii_82575");

	if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) {
		DEBUGOUT1("PHY Address %u is out of range\n", offset);
		return (-E1000_ERR_PARAM);
	}

	/*
	 * Set up Op-code, Phy Address, and register address in the I2CCMD
	 * register.  The MAC will take care of interfacing with the
	 * PHY to retrieve the desired data.
	 */
	i2ccmd = ((offset << E1000_I2CCMD_REG_ADDR_SHIFT) |
	    (phy->addr << E1000_I2CCMD_PHY_ADDR_SHIFT) |
	    (E1000_I2CCMD_OPCODE_READ));

	E1000_WRITE_REG(hw, E1000_I2CCMD, i2ccmd);

	/* Poll the ready bit to see if the I2C read completed */
	for (i = 0; i < E1000_I2CCMD_PHY_TIMEOUT; i++) {
		usec_delay(50);
		i2ccmd = E1000_READ_REG(hw, E1000_I2CCMD);
		if (i2ccmd & E1000_I2CCMD_READY)
			break;
	}
	if (!(i2ccmd & E1000_I2CCMD_READY)) {
		DEBUGOUT("I2CCMD Read did not complete\n");
		return (-E1000_ERR_PHY);
	}
	if (i2ccmd & E1000_I2CCMD_ERROR) {
		DEBUGOUT("I2CCMD Error bit set\n");
		return (-E1000_ERR_PHY);
	}

	/* Need to byte-swap the 16-bit value. */
	*data = ((i2ccmd >> 8) & 0x00FF) | ((i2ccmd << 8) & 0xFF00);

	return (E1000_SUCCESS);
}

/*
 * e1000_write_phy_reg_sgmii_82575 - Write PHY register using sgmii
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Writes the data to PHY register at the offset using the serial gigabit
 * media independent interface.
 */
static s32
e1000_write_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset, u16 data)
{
	struct e1000_phy_info *phy = &hw->phy;
	u32 i, i2ccmd = 0;
	u16 phy_data_swapped;

	DEBUGFUNC("e1000_write_phy_reg_sgmii_82575");

	if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) {
		DEBUGOUT1("PHY Address %d is out of range\n", offset);
		return (-E1000_ERR_PARAM);
	}

	/* Swap the data bytes for the I2C interface */
	phy_data_swapped = ((data >> 8) & 0x00FF) | ((data << 8) & 0xFF00);

	/*
	 * Set up Op-code, Phy Address, and register address in the I2CCMD
	 * register.  The MAC will take care of interfacing with the
	 * PHY to retrieve the desired data.
	 */
	i2ccmd = ((offset << E1000_I2CCMD_REG_ADDR_SHIFT) |
	    (phy->addr << E1000_I2CCMD_PHY_ADDR_SHIFT) |
	    E1000_I2CCMD_OPCODE_WRITE |
	    phy_data_swapped);

	E1000_WRITE_REG(hw, E1000_I2CCMD, i2ccmd);

	/* Poll the ready bit to see if the I2C read completed */
	for (i = 0; i < E1000_I2CCMD_PHY_TIMEOUT; i++) {
		usec_delay(50);
		i2ccmd = E1000_READ_REG(hw, E1000_I2CCMD);
		if (i2ccmd & E1000_I2CCMD_READY)
			break;
	}
	if (!(i2ccmd & E1000_I2CCMD_READY)) {
		DEBUGOUT("I2CCMD Write did not complete\n");
		return (-E1000_ERR_PHY);
	}
	if (i2ccmd & E1000_I2CCMD_ERROR) {
		DEBUGOUT("I2CCMD Error bit set\n");
		return (-E1000_ERR_PHY);
	}

	return (E1000_SUCCESS);
}

/*
 * e1000_get_phy_id_82575 - Retreive PHY addr and id
 * @hw: pointer to the HW structure
 *
 * Retreives the PHY address and ID for both PHY's which do and do not use
 * sgmi interface.
 */
static s32
e1000_get_phy_id_82575(struct e1000_hw *hw)
{
	struct e1000_phy_info *phy = &hw->phy;
	s32 ret_val = E1000_SUCCESS;
	u16 phy_id;

	DEBUGFUNC("e1000_get_phy_id_82575");

	/*
	 * For SGMII PHYs, we try the list of possible addresses until
	 * we find one that works.  For non-SGMII PHYs
	 * (e.g. integrated copper PHYs), an address of 1 should
	 * work.  The result of this function should mean phy->phy_addr
	 * and phy->id are set correctly.
	 */
	if (!(e1000_sgmii_active_82575(hw))) {
		phy->addr = 1;
		ret_val = e1000_get_phy_id(hw);
		goto out;
	}

	/*
	 * The address field in the I2CCMD register is 3 bits and 0 is invalid.
	 * Therefore, we need to test 1-7
	 */
	for (phy->addr = 1; phy->addr < 8; phy->addr++) {
		ret_val = e1000_read_phy_reg_sgmii_82575(hw, PHY_ID1, &phy_id);
		if (ret_val == E1000_SUCCESS) {
			DEBUGOUT2("Vendor ID 0x%08X read at address %u\n",
			    phy_id,
			    phy->addr);
			/*
			 * At the time of this writing, The M88 part is
			 * the only supported SGMII PHY product.
			 */
			if (phy_id == M88_VENDOR)
				break;
		} else {
			DEBUGOUT1("PHY address %u was unreadable\n",
			    phy->addr);
		}
	}

	/* A valid PHY type couldn't be found. */
	if (phy->addr == 8) {
		phy->addr = 0;
		ret_val = -E1000_ERR_PHY;
		goto out;
	}

	ret_val = e1000_get_phy_id(hw);

out:
	return (ret_val);
}

/*
 * e1000_phy_hw_reset_sgmii_82575 - Performs a PHY reset
 * @hw: pointer to the HW structure
 *
 * Resets the PHY using the serial gigabit media independent interface.
 */
static s32
e1000_phy_hw_reset_sgmii_82575(struct e1000_hw *hw)
{
	s32 ret_val;

	DEBUGFUNC("e1000_phy_hw_reset_sgmii_82575");

	/*
	 * This isn't a true "hard" reset, but is the only reset
	 * available to us at this time.
	 */

	DEBUGOUT("Soft resetting SGMII attached PHY...\n");

	/*
	 * SFP documentation requires the following to configure the SPF module
	 * to work on SGMII.  No further documentation is given.
	 */
	ret_val = e1000_write_phy_reg(hw, 0x1B, 0x8084);
	if (ret_val)
		goto out;

	ret_val = e1000_phy_commit(hw);

out:
	return (ret_val);
}

/*
 * e1000_set_d0_lplu_state_82575 - Set Low Power Linkup D0 state
 * @hw: pointer to the HW structure
 * @active: TRUE to enable LPLU, FALSE to disable
 *
 * Sets the LPLU D0 state according to the active flag.  When
 * activating LPLU this function also disables smart speed
 * and vice versa.  LPLU will not be activated unless the
 * device autonegotiation advertisement meets standards of
 * either 10 or 10/100 or 10/100/1000 at all duplexes.
 * This is a function pointer entry point only called by
 * PHY setup routines.
 */
static s32
e1000_set_d0_lplu_state_82575(struct e1000_hw *hw, bool active)
{
	struct e1000_phy_info *phy = &hw->phy;
	s32 ret_val;
	u16 data;

	DEBUGFUNC("e1000_set_d0_lplu_state_82575");

	ret_val = e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT, &data);
	if (ret_val)
		goto out;

	if (active) {
		data |= IGP02E1000_PM_D0_LPLU;
		ret_val = e1000_write_phy_reg(hw,
		    IGP02E1000_PHY_POWER_MGMT,
		    data);
		if (ret_val)
			goto out;

		/* When LPLU is enabled, we should disable SmartSpeed */
		ret_val = e1000_read_phy_reg(hw,
		    IGP01E1000_PHY_PORT_CONFIG,
		    &data);
		data &= ~IGP01E1000_PSCFR_SMART_SPEED;
		ret_val = e1000_write_phy_reg(hw,
		    IGP01E1000_PHY_PORT_CONFIG,
		    data);
		if (ret_val)
			goto out;
	} else {
		data &= ~IGP02E1000_PM_D0_LPLU;
		ret_val = e1000_write_phy_reg(hw,
		    IGP02E1000_PHY_POWER_MGMT,
		    data);
		/*
		 * LPLU and SmartSpeed are mutually exclusive.  LPLU is used
		 * during Dx states where the power conservation is most
		 * important.  During driver activity we should enable
		 * SmartSpeed, so performance is maintained.
		 */
		if (phy->smart_speed == e1000_smart_speed_on) {
			ret_val = e1000_read_phy_reg(hw,
			    IGP01E1000_PHY_PORT_CONFIG,
			    &data);
			if (ret_val)
				goto out;

			data |= IGP01E1000_PSCFR_SMART_SPEED;
			ret_val = e1000_write_phy_reg(hw,
			    IGP01E1000_PHY_PORT_CONFIG,
			    data);
			if (ret_val)
				goto out;
		} else if (phy->smart_speed == e1000_smart_speed_off) {
			ret_val = e1000_read_phy_reg(hw,
			    IGP01E1000_PHY_PORT_CONFIG,
			    &data);
			if (ret_val)
				goto out;

			data &= ~IGP01E1000_PSCFR_SMART_SPEED;
			ret_val = e1000_write_phy_reg(hw,
			    IGP01E1000_PHY_PORT_CONFIG,
			    data);
			if (ret_val)
				goto out;
		}
	}

out:
	return (ret_val);
}

/*
 * e1000_acquire_nvm_82575 - Request for access to EEPROM
 * @hw: pointer to the HW structure
 *
 * Acquire the necessary semaphores for exclussive access to the EEPROM.
 * Set the EEPROM access request bit and wait for EEPROM access grant bit.
 * Return successful if access grant bit set, else clear the request for
 * EEPROM access and return -E1000_ERR_NVM (-1).
 */
static s32
e1000_acquire_nvm_82575(struct e1000_hw *hw)
{
	s32 ret_val;

	DEBUGFUNC("e1000_acquire_nvm_82575");

	ret_val = e1000_acquire_swfw_sync_82575(hw, E1000_SWFW_EEP_SM);
	if (ret_val)
		goto out;

	ret_val = e1000_acquire_nvm_generic(hw);

	if (ret_val)
		e1000_release_swfw_sync_82575(hw, E1000_SWFW_EEP_SM);

out:
	return (ret_val);
}

/*
 * e1000_release_nvm_82575 - Release exclusive access to EEPROM
 * @hw: pointer to the HW structure
 *
 * Stop any current commands to the EEPROM and clear the EEPROM request bit,
 * then release the semaphores acquired.
 */
static void
e1000_release_nvm_82575(struct e1000_hw *hw)
{
	DEBUGFUNC("e1000_release_nvm_82575");

	e1000_release_nvm_generic(hw);
	e1000_release_swfw_sync_82575(hw, E1000_SWFW_EEP_SM);
}

/*
 * e1000_acquire_swfw_sync_82575 - Acquire SW/FW semaphore
 * @hw: pointer to the HW structure
 * @mask: specifies which semaphore to acquire
 *
 * Acquire the SW/FW semaphore to access the PHY or NVM.  The mask
 * will also specify which port we're acquiring the lock for.
 */
static s32
e1000_acquire_swfw_sync_82575(struct e1000_hw *hw, u16 mask)
{
	u32 swfw_sync;
	u32 swmask = mask;
	u32 fwmask = mask << 16;
	s32 ret_val = E1000_SUCCESS;
	s32 i = 0, timeout = 200;	/* FIXME: find real value to use here */

	DEBUGFUNC("e1000_acquire_swfw_sync_82575");

	while (i < timeout) {
		if (e1000_get_hw_semaphore_generic(hw)) {
			ret_val = -E1000_ERR_SWFW_SYNC;
			goto out;
		}

		swfw_sync = E1000_READ_REG(hw, E1000_SW_FW_SYNC);
		if (!(swfw_sync & (fwmask | swmask)))
			break;

		/*
		 * Firmware currently using resource (fwmask)
		 * or other software thread using resource (swmask)
		 */
		e1000_put_hw_semaphore_generic(hw);
		msec_delay_irq(5);
		i++;
	}

	if (i == timeout) {
		DEBUGOUT("Driver can't access resource, SW_FW_SYNC timeout.\n");
		ret_val = -E1000_ERR_SWFW_SYNC;
		goto out;
	}

	swfw_sync |= swmask;
	E1000_WRITE_REG(hw, E1000_SW_FW_SYNC, swfw_sync);

	e1000_put_hw_semaphore_generic(hw);

out:
	return (ret_val);
}

/*
 * e1000_release_swfw_sync_82575 - Release SW/FW semaphore
 * @hw: pointer to the HW structure
 * @mask: specifies which semaphore to acquire
 *
 * Release the SW/FW semaphore used to access the PHY or NVM.  The mask
 * will also specify which port we're releasing the lock for.
 */
static void
e1000_release_swfw_sync_82575(struct e1000_hw *hw, u16 mask)
{
	u32 swfw_sync;

	DEBUGFUNC("e1000_release_swfw_sync_82575");

	while (e1000_get_hw_semaphore_generic(hw) != E1000_SUCCESS) {
		/* Empty */
	}

	swfw_sync = E1000_READ_REG(hw, E1000_SW_FW_SYNC);
	swfw_sync &= ~mask;
	E1000_WRITE_REG(hw, E1000_SW_FW_SYNC, swfw_sync);

	e1000_put_hw_semaphore_generic(hw);
}

/*
 * e1000_get_cfg_done_82575 - Read config done bit
 * @hw: pointer to the HW structure
 *
 * Read the management control register for the config done bit for
 * completion status.  NOTE: silicon which is EEPROM-less will fail trying
 * to read the config done bit, so an error is *ONLY* logged and returns
 * E1000_SUCCESS.  If we were to return with error, EEPROM-less silicon
 * would not be able to be reset or change link.
 */
static s32
e1000_get_cfg_done_82575(struct e1000_hw *hw)
{
	s32 timeout = PHY_CFG_TIMEOUT;
	s32 ret_val = E1000_SUCCESS;
	u32 mask = E1000_NVM_CFG_DONE_PORT_0;

	DEBUGFUNC("e1000_get_cfg_done_82575");

	if (hw->bus.func == 1)
		mask = E1000_NVM_CFG_DONE_PORT_1;

	while (timeout) {
		if (E1000_READ_REG(hw, E1000_EEMNGCTL) & mask)
			break;
		msec_delay(1);
		timeout--;
	}
	if (!timeout) {
		DEBUGOUT("MNG configuration cycle has not completed.\n");
	}

	/* If EEPROM is not marked present, init the PHY manually */
	if (((E1000_READ_REG(hw, E1000_EECD) & E1000_EECD_PRES) == 0) &&
	    (hw->phy.type == e1000_phy_igp_3)) {
		(void) e1000_phy_init_script_igp3(hw);
	}
	return (ret_val);
}

/*
 * e1000_get_link_up_info_82575 - Get link speed/duplex info
 * @hw: pointer to the HW structure
 * @speed: stores the current speed
 * @duplex: stores the current duplex
 *
 * This is a wrapper function, if using the serial gigabit media independent
 * interface, use pcs to retreive the link speed and duplex information.
 * Otherwise, use the generic function to get the link speed and duplex info.
 */
static s32
e1000_get_link_up_info_82575(struct e1000_hw *hw, u16 *speed, u16 *duplex)
{
	s32 ret_val;

	DEBUGFUNC("e1000_get_link_up_info_82575");

	if (hw->phy.media_type != e1000_media_type_copper ||
	    e1000_sgmii_active_82575(hw)) {
		ret_val = e1000_get_pcs_speed_and_duplex_82575(hw, speed,
		    duplex);
	} else {
		ret_val = e1000_get_speed_and_duplex_copper_generic(hw, speed,
		    duplex);
	}

	return (ret_val);
}

/*
 * e1000_check_for_link_82575 - Check for link
 * @hw: pointer to the HW structure
 *
 * If sgmii is enabled, then use the pcs register to determine link, otherwise
 * use the generic interface for determining link.
 */
static s32
e1000_check_for_link_82575(struct e1000_hw *hw)
{
	s32 ret_val;
	u16 speed, duplex;

	DEBUGFUNC("e1000_check_for_link_82575");

	/* SGMII link check is done through the PCS register. */
	if ((hw->phy.media_type != e1000_media_type_copper) ||
	    (e1000_sgmii_active_82575(hw)))
		ret_val = e1000_get_pcs_speed_and_duplex_82575(hw, &speed,
		    &duplex);
	else
		ret_val = e1000_check_for_copper_link_generic(hw);

	return (ret_val);
}

/*
 * e1000_get_pcs_speed_and_duplex_82575 - Retrieve current speed/duplex
 * @hw: pointer to the HW structure
 * @speed: stores the current speed
 * @duplex: stores the current duplex
 *
 * Using the physical coding sub-layer (PCS), retreive the current speed and
 * duplex, then store the values in the pointers provided.
 */
static s32
e1000_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw,
    u16 *speed, u16 *duplex)
{
	struct e1000_mac_info *mac = &hw->mac;
	u32 pcs;

	DEBUGFUNC("e1000_get_pcs_speed_and_duplex_82575");

	/* Set up defaults for the return values of this function */
	mac->serdes_has_link = FALSE;
	*speed = 0;
	*duplex = 0;

	/*
	 * Read the PCS Status register for link state. For non-copper mode,
	 * the status register is not accurate. The PCS status register is
	 * used instead.
	 */
	pcs = E1000_READ_REG(hw, E1000_PCS_LSTAT);

	/*
	 * The link up bit determines when link is up on autoneg. The sync ok
	 * gets set once both sides sync up and agree upon link. Stable link
	 * can be determined by checking for both link up and link sync ok
	 */
	if ((pcs & E1000_PCS_LSTS_LINK_OK) && (pcs & E1000_PCS_LSTS_SYNK_OK)) {
		mac->serdes_has_link = TRUE;

		/* Detect and store PCS speed */
		if (pcs & E1000_PCS_LSTS_SPEED_1000) {
			*speed = SPEED_1000;
		} else if (pcs & E1000_PCS_LSTS_SPEED_100) {
			*speed = SPEED_100;
		} else {
			*speed = SPEED_10;
		}

		/* Detect and store PCS duplex */
		if (pcs & E1000_PCS_LSTS_DUPLEX_FULL) {
			*duplex = FULL_DUPLEX;
		} else {
			*duplex = HALF_DUPLEX;
		}
	}
	return (E1000_SUCCESS);
}

/*
 * e1000_rar_set_82575 - Set receive address register
 * @hw: pointer to the HW structure
 * @addr: pointer to the receive address
 * @index: receive address array register
 *
 * Sets the receive address array register at index to the address passed
 * in by addr.
 */
static void
e1000_rar_set_82575(struct e1000_hw *hw, u8 *addr, u32 index)
{
	DEBUGFUNC("e1000_rar_set_82575");

	if (index < E1000_RAR_ENTRIES_82575) {
		e1000_rar_set_generic(hw, addr, index);
	}
}

/*
 * e1000_reset_hw_82575 - Reset hardware
 * @hw: pointer to the HW structure
 *
 * This resets the hardware into a known state.  This is a
 * function pointer entry point called by the api module.
 */
static s32
e1000_reset_hw_82575(struct e1000_hw *hw)
{
	u32 ctrl;
	s32 ret_val;

	DEBUGFUNC("e1000_reset_hw_82575");

	/*
	 * Prevent the PCI-E bus from sticking if there is no TLP connection
	 * on the last TLP read/write transaction when MAC is reset.
	 */
	ret_val = e1000_disable_pcie_master_generic(hw);
	if (ret_val) {
		DEBUGOUT("PCI-E Master disable polling has failed.\n");
	}

	DEBUGOUT("Masking off all interrupts\n");
	E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);

	E1000_WRITE_REG(hw, E1000_RCTL, 0);
	E1000_WRITE_REG(hw, E1000_TCTL, E1000_TCTL_PSP);
	E1000_WRITE_FLUSH(hw);

	msec_delay(10);

	ctrl = E1000_READ_REG(hw, E1000_CTRL);

	DEBUGOUT("Issuing a global reset to MAC\n");
	E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_RST);

	ret_val = e1000_get_auto_rd_done_generic(hw);
	if (ret_val) {
		/*
		 * When auto config read does not complete, do not
		 * return with an error. This can happen in situations
		 * where there is no eeprom and prevents getting link.
		 */
		DEBUGOUT("Auto Read Done did not complete\n");
	}

	/* If EEPROM is not present, run manual init scripts */
	if ((E1000_READ_REG(hw, E1000_EECD) & E1000_EECD_PRES) == 0)
		(void) e1000_reset_init_script_82575(hw);

	/* Clear any pending interrupt events. */
	E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
	(void) E1000_READ_REG(hw, E1000_ICR);

	(void) e1000_check_alt_mac_addr_generic(hw);

	return (ret_val);
}

/*
 * e1000_init_hw_82575 - Initialize hardware
 * @hw: pointer to the HW structure
 *
 * This inits the hardware readying it for operation.
 */
static s32
e1000_init_hw_82575(struct e1000_hw *hw)
{
	struct e1000_mac_info *mac = &hw->mac;
	s32 ret_val;
	u16 i, rar_count = mac->rar_entry_count;

	DEBUGFUNC("e1000_init_hw_82575");

	/* Initialize identification LED */
	ret_val = e1000_id_led_init_generic(hw);
	if (ret_val) {
		DEBUGOUT("Error initializing identification LED\n");
		/* This is not fatal and we should not stop init due to this */
	}

	/* Disabling VLAN filtering */
	DEBUGOUT("Initializing the IEEE VLAN\n");
	e1000_clear_vfta(hw);

	/* Setup the receive address */
	e1000_init_rx_addrs_generic(hw, rar_count);
	/* Zero out the Multicast HASH table */
	DEBUGOUT("Zeroing the MTA\n");
	for (i = 0; i < mac->mta_reg_count; i++)
		E1000_WRITE_REG_ARRAY(hw, E1000_MTA, i, 0);

	/* Setup link and flow control */
	ret_val = e1000_setup_link(hw);

	/*
	 * Clear all of the statistics registers (clear on read).  It is
	 * important that we do this after we have tried to establish link
	 * because the symbol error count will increment wildly if there
	 * is no link.
	 */
	e1000_clear_hw_cntrs_82575(hw);

	return (ret_val);
}

/*
 * e1000_setup_copper_link_82575 - Configure copper link settings
 * @hw: pointer to the HW structure
 *
 * Configures the link for auto-neg or forced speed and duplex.  Then we check
 * for link, once link is established calls to configure collision distance
 * and flow control are called.
 */
static s32
e1000_setup_copper_link_82575(struct e1000_hw *hw)
{
	u32 ctrl, led_ctrl;
	s32 ret_val;
	bool link;

	DEBUGFUNC("e1000_setup_copper_link_82575");

	ctrl = E1000_READ_REG(hw, E1000_CTRL);
	ctrl |= E1000_CTRL_SLU;
	ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
	E1000_WRITE_REG(hw, E1000_CTRL, ctrl);

	switch (hw->phy.type) {
	case e1000_phy_m88:
		ret_val = e1000_copper_link_setup_m88(hw);
		break;
	case e1000_phy_igp_3:
		ret_val = e1000_copper_link_setup_igp(hw);
		/* Setup activity LED */
		led_ctrl = E1000_READ_REG(hw, E1000_LEDCTL);
		led_ctrl &= IGP_ACTIVITY_LED_MASK;
		led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE);
		E1000_WRITE_REG(hw, E1000_LEDCTL, led_ctrl);
		break;
	default:
		ret_val = -E1000_ERR_PHY;
		break;
	}

	if (ret_val)
		goto out;

	if (hw->mac.autoneg) {
		/*
		 * Setup autoneg and flow control advertisement
		 * and perform autonegotiation.
		 */
		ret_val = e1000_copper_link_autoneg(hw);
		if (ret_val)
			goto out;
	} else {
		/*
		 * PHY will be set to 10H, 10F, 100H or 100F
		 * depending on user settings.
		 */
		DEBUGOUT("Forcing Speed and Duplex\n");
		ret_val = e1000_phy_force_speed_duplex(hw);
		if (ret_val) {
			DEBUGOUT("Error Forcing Speed and Duplex\n");
			goto out;
		}
	}

	ret_val = e1000_configure_pcs_link_82575(hw);
	if (ret_val)
		goto out;

	/*
	 * Check link status. Wait up to 100 microseconds for link to become
	 * valid.
	 */
	ret_val = e1000_phy_has_link_generic(hw,
	    COPPER_LINK_UP_LIMIT,
	    10,
	    &link);
	if (ret_val)
		goto out;

	if (link) {
		DEBUGOUT("Valid link established!!!\n");
		/* Config the MAC and PHY after link is up */
		e1000_config_collision_dist_generic(hw);
		ret_val = e1000_config_fc_after_link_up_generic(hw);
	} else {
		DEBUGOUT("Unable to establish link!!!\n");
	}

out:
	return (ret_val);
}

/*
 * e1000_setup_fiber_serdes_link_82575 - Setup link for fiber/serdes
 * @hw: pointer to the HW structure
 *
 * Configures speed and duplex for fiber and serdes links.
 */
static s32
e1000_setup_fiber_serdes_link_82575(struct e1000_hw *hw)
{
	u32 reg;

	DEBUGFUNC("e1000_setup_fiber_serdes_link_82575");

	/*
	 * On the 82575, SerDes loopback mode persists until it is
	 * explicitly turned off or a power cycle is performed.  A read to
	 * the register does not indicate its status.  Therefore, we ensure
	 * loopback mode is disabled during initialization.
	 */
	E1000_WRITE_REG(hw, E1000_SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);

	/* Force link up, set 1gb, set both sw defined pins */
	reg = E1000_READ_REG(hw, E1000_CTRL);
	reg |= E1000_CTRL_SLU |
	    E1000_CTRL_SPD_1000 |
	    E1000_CTRL_FRCSPD |
	    E1000_CTRL_SWDPIN0 |
	    E1000_CTRL_SWDPIN1;
	E1000_WRITE_REG(hw, E1000_CTRL, reg);

	/* Set switch control to serdes energy detect */
	reg = E1000_READ_REG(hw, E1000_CONNSW);
	reg |= E1000_CONNSW_ENRGSRC;
	E1000_WRITE_REG(hw, E1000_CONNSW, reg);

	/*
	 * New SerDes mode allows for forcing speed or autonegotiating speed
	 * at 1gb. Autoneg should be default set by most drivers. This is the
	 * mode that will be compatible with older link partners and switches.
	 * However, both are supported by the hardware and some drivers/tools.
	 */
	reg = E1000_READ_REG(hw, E1000_PCS_LCTL);

	reg &= ~(E1000_PCS_LCTL_AN_ENABLE | E1000_PCS_LCTL_FLV_LINK_UP |
	    E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK);

	if (hw->mac.autoneg) {
		/* Set PCS register for autoneg */
		reg |= E1000_PCS_LCTL_FSV_1000 |	/* Force 1000    */
		    E1000_PCS_LCTL_FDV_FULL |	/* SerDes Full duplex */
		    E1000_PCS_LCTL_AN_ENABLE |	/* Enable Autoneg */
		    E1000_PCS_LCTL_AN_RESTART;	/* Restart autoneg */
		DEBUGOUT1("Configuring Autoneg; PCS_LCTL = 0x%08X\n", reg);
	} else {
		/* Set PCS register for forced speed */
		reg |= E1000_PCS_LCTL_FLV_LINK_UP |	/* Force link up */
		    E1000_PCS_LCTL_FSV_1000 |	/* Force 1000    */
		    E1000_PCS_LCTL_FDV_FULL |	/* SerDes Full duplex */
		    E1000_PCS_LCTL_FSD |	/* Force Speed */
		    E1000_PCS_LCTL_FORCE_LINK;	/* Force Link */
		DEBUGOUT1("Configuring Forced Link; PCS_LCTL = 0x%08X\n", reg);
	}
	E1000_WRITE_REG(hw, E1000_PCS_LCTL, reg);

	return (E1000_SUCCESS);
}

/*
 * e1000_configure_pcs_link_82575 - Configure PCS link
 * @hw: pointer to the HW structure
 *
 * Configure the physical coding sub-layer (PCS) link.  The PCS link is
 * only used on copper connections where the serialized gigabit media
 * independent interface (sgmii) is being used.  Configures the link
 * for auto-negotiation or forces speed/duplex.
 */
static s32
e1000_configure_pcs_link_82575(struct e1000_hw *hw)
{
	struct e1000_mac_info *mac = &hw->mac;
	u32 reg = 0;

	DEBUGFUNC("e1000_configure_pcs_link_82575");

	if (hw->phy.media_type != e1000_media_type_copper ||
	    !(e1000_sgmii_active_82575(hw)))
		goto out;

	/* For SGMII, we need to issue a PCS autoneg restart */
	reg = E1000_READ_REG(hw, E1000_PCS_LCTL);

	/* AN time out should be disabled for SGMII mode */
	reg &= ~(E1000_PCS_LCTL_AN_TIMEOUT);

	if (mac->autoneg) {
		/* Make sure forced speed and force link are not set */
		reg &= ~(E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK);

		/*
		 * The PHY should be setup prior to calling this function.
		 * All we need to do is restart autoneg and enable autoneg.
		 */
		reg |= E1000_PCS_LCTL_AN_RESTART | E1000_PCS_LCTL_AN_ENABLE;
	} else {
		/* Set PCS regiseter for forced speed */

		/* Turn off bits for full duplex, speed, and autoneg */
		reg &= ~(E1000_PCS_LCTL_FSV_1000 |
		    E1000_PCS_LCTL_FSV_100 |
		    E1000_PCS_LCTL_FDV_FULL |
		    E1000_PCS_LCTL_AN_ENABLE);

		/* Check for duplex first */
		if (mac->forced_speed_duplex & E1000_ALL_FULL_DUPLEX)
			reg |= E1000_PCS_LCTL_FDV_FULL;

		/* Now set speed */
		if (mac->forced_speed_duplex & E1000_ALL_100_SPEED)
			reg |= E1000_PCS_LCTL_FSV_100;

		/* Force speed and force link */
		reg |= E1000_PCS_LCTL_FSD |
		    E1000_PCS_LCTL_FORCE_LINK |
		    E1000_PCS_LCTL_FLV_LINK_UP;

		DEBUGOUT1("Wrote 0x%08X to PCS_LCTL to configure forced link\n",
		    reg);
	}
	E1000_WRITE_REG(hw, E1000_PCS_LCTL, reg);

out:
	return (E1000_SUCCESS);
}

/*
 * e1000_sgmii_active_82575 - Return sgmii state
 * @hw: pointer to the HW structure
 *
 * 82575 silicon has a serialized gigabit media independent interface (sgmii)
 * which can be enabled for use in the embedded applications.  Simply
 * return the current state of the sgmii interface.
 */
static bool
e1000_sgmii_active_82575(struct e1000_hw *hw)
{
	struct e1000_dev_spec_82575 *dev_spec;
	bool ret_val;

	DEBUGFUNC("e1000_sgmii_active_82575");

	if (hw->mac.type != e1000_82575) {
		ret_val = FALSE;
		goto out;
	}

	dev_spec = (struct e1000_dev_spec_82575 *)hw->dev_spec;

	ret_val = dev_spec->sgmii_active;

out:
	return (ret_val);
}

/*
 * e1000_reset_init_script_82575 - Inits HW defaults after reset
 * @hw: pointer to the HW structure
 *
 * Inits recommended HW defaults after a reset when there is no EEPROM
 * detected. This is only for the 82575.
 */
static s32
e1000_reset_init_script_82575(struct e1000_hw *hw)
{
	DEBUGFUNC("e1000_reset_init_script_82575");

	if (hw->mac.type == e1000_82575) {
		DEBUGOUT("Running reset init script for 82575\n");
		/* SerDes configuration via SERDESCTRL */
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x00, 0x0C);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x01, 0x78);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x1B, 0x23);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x23, 0x15);

		/* CCM configuration via CCMCTL register */
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_CCMCTL, 0x14, 0x00);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_CCMCTL, 0x10, 0x00);

		/* PCIe lanes configuration */
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x00, 0xEC);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x61, 0xDF);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x34, 0x05);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x2F, 0x81);

		/* PCIe PLL Configuration */
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x02, 0x47);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x14, 0x00);
		(void) e1000_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x10, 0x00);
	}

	return (E1000_SUCCESS);
}

/*
 * e1000_read_mac_addr_82575 - Read device MAC address
 * @hw: pointer to the HW structure
 */
static s32
e1000_read_mac_addr_82575(struct e1000_hw *hw)
{
	s32 ret_val = E1000_SUCCESS;

	DEBUGFUNC("e1000_read_mac_addr_82575");
	if (e1000_check_alt_mac_addr_generic(hw))
		ret_val = e1000_read_mac_addr_generic(hw);

	return (ret_val);
}

/*
 * e1000_power_down_phy_copper_82575 - Remove link during PHY power down
 * @hw: pointer to the HW structure
 *
 * In the case of a PHY power down to save power, or to turn off link during a
 * driver unload, or wake on lan is not enabled, remove the link.
 */
static void
e1000_power_down_phy_copper_82575(struct e1000_hw *hw)
{
	/* If the management interface is not enabled, then power down */
	if (!(e1000_check_mng_mode(hw) || e1000_check_reset_block(hw)))
		e1000_power_down_phy_copper(hw);
}

/*
 * e1000_clear_hw_cntrs_82575 - Clear device specific hardware counters
 * @hw: pointer to the HW structure
 *
 * Clears the hardware counters by reading the counter registers.
 */
static void
e1000_clear_hw_cntrs_82575(struct e1000_hw *hw)
{
	DEBUGFUNC("e1000_clear_hw_cntrs_82575");

	e1000_clear_hw_cntrs_base_generic(hw);

	(void) E1000_READ_REG(hw, E1000_PRC64);
	(void) E1000_READ_REG(hw, E1000_PRC127);
	(void) E1000_READ_REG(hw, E1000_PRC255);
	(void) E1000_READ_REG(hw, E1000_PRC511);
	(void) E1000_READ_REG(hw, E1000_PRC1023);
	(void) E1000_READ_REG(hw, E1000_PRC1522);
	(void) E1000_READ_REG(hw, E1000_PTC64);
	(void) E1000_READ_REG(hw, E1000_PTC127);
	(void) E1000_READ_REG(hw, E1000_PTC255);
	(void) E1000_READ_REG(hw, E1000_PTC511);
	(void) E1000_READ_REG(hw, E1000_PTC1023);
	(void) E1000_READ_REG(hw, E1000_PTC1522);

	(void) E1000_READ_REG(hw, E1000_ALGNERRC);
	(void) E1000_READ_REG(hw, E1000_RXERRC);
	(void) E1000_READ_REG(hw, E1000_TNCRS);
	(void) E1000_READ_REG(hw, E1000_CEXTERR);
	(void) E1000_READ_REG(hw, E1000_TSCTC);
	(void) E1000_READ_REG(hw, E1000_TSCTFC);

	(void) E1000_READ_REG(hw, E1000_MGTPRC);
	(void) E1000_READ_REG(hw, E1000_MGTPDC);
	(void) E1000_READ_REG(hw, E1000_MGTPTC);

	(void) E1000_READ_REG(hw, E1000_IAC);
	(void) E1000_READ_REG(hw, E1000_ICRXOC);

	(void) E1000_READ_REG(hw, E1000_ICRXPTC);
	(void) E1000_READ_REG(hw, E1000_ICRXATC);
	(void) E1000_READ_REG(hw, E1000_ICTXPTC);
	(void) E1000_READ_REG(hw, E1000_ICTXATC);
	(void) E1000_READ_REG(hw, E1000_ICTXQEC);
	(void) E1000_READ_REG(hw, E1000_ICTXQMTC);
	(void) E1000_READ_REG(hw, E1000_ICRXDMTC);

	(void) E1000_READ_REG(hw, E1000_CBTMPC);
	(void) E1000_READ_REG(hw, E1000_HTDPMC);
	(void) E1000_READ_REG(hw, E1000_CBRMPC);
	(void) E1000_READ_REG(hw, E1000_RPTHC);
	(void) E1000_READ_REG(hw, E1000_HGPTC);
	(void) E1000_READ_REG(hw, E1000_HTCBDPC);
	(void) E1000_READ_REG(hw, E1000_HGORCL);
	(void) E1000_READ_REG(hw, E1000_HGORCH);
	(void) E1000_READ_REG(hw, E1000_HGOTCL);
	(void) E1000_READ_REG(hw, E1000_HGOTCH);
	(void) E1000_READ_REG(hw, E1000_LENERRS);

	/* This register should not be read in copper configurations */
	if (hw->phy.media_type == e1000_media_type_internal_serdes)
		(void) E1000_READ_REG(hw, E1000_SCVPC);
}