832 need Intel 82579 Gigabit Ethernet PHY support in e1000g

[illumos-gate.git] / usr / src / uts / common / io / e1000g / e1000_phy.c

/*
 * This file is provided under a CDDLv1 license.  When using or
 * redistributing this file, you may do so under this license.
 * In redistributing this file this license must be included
 * and no other modification of this header file is permitted.
 *
 * CDDL LICENSE SUMMARY
 *
 * Copyright(c) 1999 - 2009 Intel Corporation. All rights reserved.
 *
 * The contents of this file are subject to the terms of Version
 * 1.0 of the Common Development and Distribution License (the "License").
 *
 * You should have received a copy of the License with this software.
 * 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.
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms of the CDDLv1.
 */

/*
 * Copyright (c) 2001-2010, Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *  3. Neither the name of the Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "e1000_api.h"

static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg);
static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
    u16 *data, bool read);

static u32 e1000_get_phy_addr_for_hv_page(u32 page);
static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
    u16 *data, bool read);

/* Cable length tables */
static const u16 e1000_m88_cable_length_table[] =
        {0, 50, 80, 110, 140, 140, E1000_CABLE_LENGTH_UNDEFINED};

#define M88E1000_CABLE_LENGTH_TABLE_SIZE \
        (sizeof (e1000_m88_cable_length_table) / \
        sizeof (e1000_m88_cable_length_table[0]))

static const u16 e1000_igp_2_cable_length_table[] =
        {0, 0, 0, 0, 0, 0, 0, 0, 3, 5, 8, 11, 13, 16, 18, 21,
        0, 0, 0, 3, 6, 10, 13, 16, 19, 23, 26, 29, 32, 35, 38, 41,
        6, 10, 14, 18, 22, 26, 30, 33, 37, 41, 44, 48, 51, 54, 58, 61,
        21, 26, 31, 35, 40, 44, 49, 53, 57, 61, 65, 68, 72, 75, 79, 82,
        40, 45, 51, 56, 61, 66, 70, 75, 79, 83, 87, 91, 94, 98, 101, 104,
        60, 66, 72, 77, 82, 87, 92, 96, 100, 104, 108, 111, 114, 117, 119, 121,
        83, 89, 95, 100, 105, 109, 113, 116, 119, 122, 124,
        104, 109, 114, 118, 121, 124};

#define IGP02E1000_CABLE_LENGTH_TABLE_SIZE \
        (sizeof (e1000_igp_2_cable_length_table) / \
        sizeof (e1000_igp_2_cable_length_table[0]))

/*
 * e1000_init_phy_ops_generic - Initialize PHY function pointers
 * @hw: pointer to the HW structure
 *
 * Setups up the function pointers to no-op functions
 */
void
e1000_init_phy_ops_generic(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        DEBUGFUNC("e1000_init_phy_ops_generic");

        /* Initialize function pointers */
        phy->ops.init_params = e1000_null_ops_generic;
        phy->ops.acquire = e1000_null_ops_generic;
        phy->ops.check_polarity = e1000_null_ops_generic;
        phy->ops.check_reset_block = e1000_null_ops_generic;
        phy->ops.commit = e1000_null_ops_generic;
        phy->ops.force_speed_duplex = e1000_null_ops_generic;
        phy->ops.get_cfg_done = e1000_null_ops_generic;
        phy->ops.get_cable_length = e1000_null_ops_generic;
        phy->ops.get_info = e1000_null_ops_generic;
        phy->ops.read_reg = e1000_null_read_reg;
        phy->ops.read_reg_locked = e1000_null_read_reg;
        phy->ops.release = e1000_null_phy_generic;
        phy->ops.reset = e1000_null_ops_generic;
        phy->ops.set_d0_lplu_state = e1000_null_lplu_state;
        phy->ops.set_d3_lplu_state = e1000_null_lplu_state;
        phy->ops.write_reg = e1000_null_write_reg;
        phy->ops.write_reg_locked = e1000_null_write_reg;
        phy->ops.power_up = e1000_null_phy_generic;
        phy->ops.power_down = e1000_null_phy_generic;
        phy->ops.cfg_on_link_up = e1000_null_ops_generic;
}

/*
 * e1000_null_read_reg - No-op function, return 0
 * @hw: pointer to the HW structure
 */
s32
e1000_null_read_reg(struct e1000_hw *hw, u32 offset, u16 *data)
{
        DEBUGFUNC("e1000_null_read_reg");
        UNREFERENCED_3PARAMETER(hw, offset, data);
        return (E1000_SUCCESS);
}

/*
 * e1000_null_phy_generic - No-op function, return void
 * @hw: pointer to the HW structure
 */
void
e1000_null_phy_generic(struct e1000_hw *hw)
{
        DEBUGFUNC("e1000_null_phy_generic");
        UNREFERENCED_1PARAMETER(hw);
}

/*
 * e1000_null_lplu_state - No-op function, return 0
 * @hw: pointer to the HW structure
 */
s32
e1000_null_lplu_state(struct e1000_hw *hw, bool active)
{
        DEBUGFUNC("e1000_null_lplu_state");
        UNREFERENCED_2PARAMETER(hw, active);
        return (E1000_SUCCESS);
}

/*
 * e1000_null_write_reg - No-op function, return 0
 * @hw: pointer to the HW structure
 */
s32
e1000_null_write_reg(struct e1000_hw *hw, u32 offset, u16 data)
{
        DEBUGFUNC("e1000_null_write_reg");
        UNREFERENCED_3PARAMETER(hw, offset, data);
        return (E1000_SUCCESS);
}

/*
 * e1000_check_reset_block_generic - Check if PHY reset is blocked
 * @hw: pointer to the HW structure
 *
 * Read the PHY management control register and check whether a PHY reset
 * is blocked.  If a reset is not blocked return E1000_SUCCESS, otherwise
 * return E1000_BLK_PHY_RESET (12).
 */
s32
e1000_check_reset_block_generic(struct e1000_hw *hw)
{
        u32 manc;

        DEBUGFUNC("e1000_check_reset_block");

        manc = E1000_READ_REG(hw, E1000_MANC);

        return ((manc & E1000_MANC_BLK_PHY_RST_ON_IDE) ?
            E1000_BLK_PHY_RESET : E1000_SUCCESS);
}

/*
 * e1000_get_phy_id - Retrieve the PHY ID and revision
 * @hw: pointer to the HW structure
 *
 * Reads the PHY registers and stores the PHY ID and possibly the PHY
 * revision in the hardware structure.
 */
s32
e1000_get_phy_id(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val = E1000_SUCCESS;
        u16 phy_id;
        u16 retry_count = 0;

        DEBUGFUNC("e1000_get_phy_id");

        if (!(phy->ops.read_reg))
                goto out;

        while (retry_count < 2) {
                ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id);
                if (ret_val)
                        goto out;

                phy->id = (u32)(phy_id << 16);
                usec_delay(20);
                ret_val = phy->ops.read_reg(hw, PHY_ID2, &phy_id);
                if (ret_val)
                        goto out;

                phy->id |= (u32)(phy_id & PHY_REVISION_MASK);
                phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);

                if (phy->id != 0 && phy->id != PHY_REVISION_MASK)
                        goto out;

                retry_count++;
        }
out:
        return (ret_val);
}

/*
 * e1000_phy_reset_dsp_generic - Reset PHY DSP
 * @hw: pointer to the HW structure
 *
 * Reset the digital signal processor.
 */
s32
e1000_phy_reset_dsp_generic(struct e1000_hw *hw)
{
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_phy_reset_dsp_generic");

        if (!(hw->phy.ops.write_reg))
                goto out;

        ret_val = hw->phy.ops.write_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xC1);
        if (ret_val)
                goto out;

        ret_val = hw->phy.ops.write_reg(hw, M88E1000_PHY_GEN_CONTROL, 0);

out:
        return (ret_val);
}

/*
 * e1000_read_phy_reg_mdic - Read MDI control register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Reads the MDI control register in the PHY at offset and stores the
 * information read to data.
 */
s32
e1000_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data)
{
        struct e1000_phy_info *phy = &hw->phy;
        u32 i, mdic = 0;
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_read_phy_reg_mdic");

        /*
         * Set up Op-code, Phy Address, and register offset in the MDI Control
         * register.  The MAC will take care of interfacing with the PHY to
         * retrieve the desired data.
         */
        mdic = ((offset << E1000_MDIC_REG_SHIFT) |
            (phy->addr << E1000_MDIC_PHY_SHIFT) |
            (E1000_MDIC_OP_READ));

        E1000_WRITE_REG(hw, E1000_MDIC, mdic);

        /*
         * Poll the ready bit to see if the MDI read completed
         * Increasing the time out as testing showed failures with
         * the lower time out
         */
        for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
                usec_delay(50);
                mdic = E1000_READ_REG(hw, E1000_MDIC);
                if (mdic & E1000_MDIC_READY)
                        break;
        }
        if (!(mdic & E1000_MDIC_READY)) {
                DEBUGOUT("MDI Read did not complete\n");
                ret_val = -E1000_ERR_PHY;
                goto out;
        }
        if (mdic & E1000_MDIC_ERROR) {
                DEBUGOUT("MDI Error\n");
                ret_val = -E1000_ERR_PHY;
                goto out;
        }
        *data = (u16)mdic;

        /*
         * Allow some time after each MDIC transaction to avoid
         * reading duplicate data in the next MDIC transaction.
         */
        if (hw->mac.type == e1000_pch2lan)
                usec_delay(100);

out:
        return (ret_val);
}

/*
 * e1000_write_phy_reg_mdic - Write MDI control register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write to register at offset
 *
 * Writes data to MDI control register in the PHY at offset.
 */
s32
e1000_write_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 data)
{
        struct e1000_phy_info *phy = &hw->phy;
        u32 i, mdic = 0;
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_write_phy_reg_mdic");

        /*
         * Set up Op-code, Phy Address, and register offset in the MDI Control
         * register.  The MAC will take care of interfacing with the PHY to
         * retrieve the desired data.
         */
        mdic = (((u32)data) |
            (offset << E1000_MDIC_REG_SHIFT) |
            (phy->addr << E1000_MDIC_PHY_SHIFT) |
            (E1000_MDIC_OP_WRITE));

        E1000_WRITE_REG(hw, E1000_MDIC, mdic);

        /*
         * Poll the ready bit to see if the MDI read completed
         * Increasing the time out as testing showed failures with
         * the lower time out
         */
        for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
                usec_delay(50);
                mdic = E1000_READ_REG(hw, E1000_MDIC);
                if (mdic & E1000_MDIC_READY)
                        break;
        }
        if (!(mdic & E1000_MDIC_READY)) {
                DEBUGOUT("MDI Write did not complete\n");
                ret_val = -E1000_ERR_PHY;
                goto out;
        }
        if (mdic & E1000_MDIC_ERROR) {
                DEBUGOUT("MDI Error\n");
                ret_val = -E1000_ERR_PHY;
                goto out;
        }

        /*
         * Allow some time after each MDIC transaction to avoid
         * reading duplicate data in the next MDIC transaction.
         */
        if (hw->mac.type == e1000_pch2lan)
                usec_delay(100);

out:
        return (ret_val);
}

/*
 * e1000_read_phy_reg_m88 - Read m88 PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Acquires semaphore, if necessary, then reads the PHY register at offset
 * and storing the retrieved information in data.  Release any acquired
 * semaphores before exiting.
 */
s32
e1000_read_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 *data)
{
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_read_phy_reg_m88");

        if (!(hw->phy.ops.acquire))
                goto out;

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val)
                goto out;

        ret_val = e1000_read_phy_reg_mdic(hw,
            MAX_PHY_REG_ADDRESS & offset,
            data);

        hw->phy.ops.release(hw);

out:
        return (ret_val);
}

/*
 * e1000_write_phy_reg_m88 - Write m88 PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Acquires semaphore, if necessary, then writes the data to PHY register
 * at the offset.  Release any acquired semaphores before exiting.
 */
s32
e1000_write_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 data)
{
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_write_phy_reg_m88");

        if (!(hw->phy.ops.acquire))
                goto out;

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val)
                goto out;

        ret_val = e1000_write_phy_reg_mdic(hw,
            MAX_PHY_REG_ADDRESS & offset,
            data);

        hw->phy.ops.release(hw);

out:
        return (ret_val);
}

/*
 * e1000_read_phy_reg_igp - Read igp PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 * @locked: semaphore has already been acquired or not
 *
 * Acquires semaphore, if necessary, then reads the PHY register at offset
 * and stores the retrieved information in data.  Release any acquired
 * semaphores before exiting.
 */
static s32
__e1000_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data,
    bool locked)
{
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("__e1000_read_phy_reg_igp");

        if (!locked) {
                if (!(hw->phy.ops.acquire))
                        goto out;

                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val)
                        goto out;
        }

        if (offset > MAX_PHY_MULTI_PAGE_REG) {
                ret_val = e1000_write_phy_reg_mdic(hw,
                    IGP01E1000_PHY_PAGE_SELECT, (u16)offset);
                if (ret_val)
                        goto release;
        }

        ret_val = e1000_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
            data);

release:
        if (!locked)
                hw->phy.ops.release(hw);
out:
        return (ret_val);
}

/*
 * e1000_read_phy_reg_igp - Read igp PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Acquires semaphore then reads the PHY register at offset and stores the
 * retrieved information in data.
 * Release the acquired semaphore before exiting.
 */
s32
e1000_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data)
{
        return (__e1000_read_phy_reg_igp(hw, offset, data, false));
}

/*
 * e1000_read_phy_reg_igp_locked - Read igp PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Reads the PHY register at offset and stores the retrieved information
 * in data.  Assumes semaphore already acquired.
 */
s32
e1000_read_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 *data)
{
        return (__e1000_read_phy_reg_igp(hw, offset, data, true));
}

/*
 * e1000_write_phy_reg_igp - Write igp PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 * @locked: semaphore has already been acquired or not
 *
 * Acquires semaphore, if necessary, then writes the data to PHY register
 * at the offset.  Release any acquired semaphores before exiting.
 */
static s32
__e1000_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data,
    bool locked)
{
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_write_phy_reg_igp");

        if (!locked) {
                if (!(hw->phy.ops.acquire))
                        goto out;

                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val)
                        goto out;
        }

        if (offset > MAX_PHY_MULTI_PAGE_REG) {
                ret_val = e1000_write_phy_reg_mdic(hw,
                    IGP01E1000_PHY_PAGE_SELECT, (u16)offset);
                if (ret_val)
                        goto release;
        }

        ret_val = e1000_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
            data);

release:
        if (!locked)
                hw->phy.ops.release(hw);

out:
        return (ret_val);
}

/*
 * e1000_write_phy_reg_igp - Write igp PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Acquires semaphore then writes the data to PHY register
 * at the offset.  Release any acquired semaphores before exiting.
 */
s32
e1000_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data)
{
        return (__e1000_write_phy_reg_igp(hw, offset, data, false));
}

/*
 * e1000_write_phy_reg_igp_locked - Write igp PHY register
 * @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.
 * Assumes semaphore already acquired.
 */
s32
e1000_write_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 data)
{
        return (__e1000_write_phy_reg_igp(hw, offset, data, true));
}

/*
 * __e1000_read_kmrn_reg - Read kumeran register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 * @locked: semaphore has already been acquired or not
 *
 * Acquires semaphore, if necessary. Then reads the PHY register at offset
 * using the kumeran interface. The information retrieved is stored in data.
 * Release any acquired semaphores before exiting.
 */
static s32
__e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data, bool locked)
{
        u32 kmrnctrlsta;
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("__e1000_read_kmrn_reg");

        if (!locked) {
                if (!(hw->phy.ops.acquire))
                        goto out;

                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val)
                        goto out;
        }

        kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
            E1000_KMRNCTRLSTA_OFFSET) | E1000_KMRNCTRLSTA_REN;
        E1000_WRITE_REG(hw, E1000_KMRNCTRLSTA, kmrnctrlsta);

        usec_delay(2);

        kmrnctrlsta = E1000_READ_REG(hw, E1000_KMRNCTRLSTA);
        *data = (u16)kmrnctrlsta;

        if (!locked)
                hw->phy.ops.release(hw);

out:
        return (ret_val);
}

/*
 * e1000_read_kmrn_reg_generic -  Read kumeran register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Acquires semaphore then reads the PHY register at offset using the
 * kumeran interface.  The information retrieved is stored in data.
 * Release the acquired semaphore before exiting.
 */
s32
e1000_read_kmrn_reg_generic(struct e1000_hw *hw, u32 offset, u16 *data)
{
        return (__e1000_read_kmrn_reg(hw, offset, data, false));
}

/*
 * e1000_read_kmrn_reg_locked -  Read kumeran register
 * @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 kumeran interface.  The
 * information retrieved is stored in data.
 * Assumes semaphore already acquired.
 */
s32
e1000_read_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 *data)
{
        return (__e1000_read_kmrn_reg(hw, offset, data, true));
}

/*
 * __e1000_write_kmrn_reg - Write kumeran register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 * @locked: semaphore has already been acquired or not
 *
 * Acquires semaphore, if necessary.  Then write the data to PHY register
 * at the offset using the kumeran interface.  Release any acquired semaphores
 * before exiting.
 */
static s32
__e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data, bool locked)
{
        u32 kmrnctrlsta;
        s32 ret_val = E1000_SUCCESS;

        DEBUGFUNC("e1000_write_kmrn_reg_generic");

        if (!locked) {
                if (!(hw->phy.ops.acquire))
                        goto out;

                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val)
                        goto out;
        }

        kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
            E1000_KMRNCTRLSTA_OFFSET) | data;
        E1000_WRITE_REG(hw, E1000_KMRNCTRLSTA, kmrnctrlsta);

        usec_delay(2);

        if (!locked)
                hw->phy.ops.release(hw);

out:
        return (ret_val);
}

/*
 * e1000_write_kmrn_reg_generic -  Write kumeran register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Acquires semaphore then writes the data to the PHY register at the offset
 * using the kumeran interface.  Release the acquired semaphore before exiting.
 */
s32
e1000_write_kmrn_reg_generic(struct e1000_hw *hw, u32 offset, u16 data)
{
        return (__e1000_write_kmrn_reg(hw, offset, data, false));
}

/*
 * e1000_write_kmrn_reg_locked -  Write kumeran register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Write the data to PHY register at the offset using the kumeran interface.
 * Assumes semaphore already acquired.
 */
s32
e1000_write_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 data)
{
        return (__e1000_write_kmrn_reg(hw, offset, data, true));
}

/*
 * e1000_copper_link_setup_82577 - Setup 82577 PHY for copper link
 * @hw: pointer to the HW structure
 *
 * Sets up Carrier-sense on Transmit and downshift values.
 */
s32
e1000_copper_link_setup_82577(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data;

        DEBUGFUNC("e1000_copper_link_setup_82577");

        if (phy->reset_disable) {
                ret_val = E1000_SUCCESS;
                goto out;
        }

        /* Enable CRS on TX. This must be set for half-duplex operation. */
        ret_val = phy->ops.read_reg(hw, I82577_CFG_REG, &phy_data);
        if (ret_val)
                goto out;

        phy_data |= I82577_CFG_ASSERT_CRS_ON_TX;

        /* Enable downshift */
        phy_data |= I82577_CFG_ENABLE_DOWNSHIFT;

        ret_val = phy->ops.write_reg(hw, I82577_CFG_REG, phy_data);
        if (ret_val)
                goto out;

        /* Set number of link attempts before downshift */
        ret_val = phy->ops.read_reg(hw, I82577_CTRL_REG, &phy_data);
        if (ret_val)
                goto out;
        phy_data &= ~I82577_CTRL_DOWNSHIFT_MASK;
        ret_val = phy->ops.write_reg(hw, I82577_CTRL_REG, phy_data);

out:
        return (ret_val);
}

/*
 * e1000_copper_link_setup_m88 - Setup m88 PHY's for copper link
 * @hw: pointer to the HW structure
 *
 * Sets up MDI/MDI-X and polarity for m88 PHY's.  If necessary, transmit clock
 * and downshift values are set also.
 */
s32
e1000_copper_link_setup_m88(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data;

        DEBUGFUNC("e1000_copper_link_setup_m88");

        if (phy->reset_disable) {
                ret_val = E1000_SUCCESS;
                goto out;
        }

        /* Enable CRS on TX. This must be set for half-duplex operation. */
        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
        if (ret_val)
                goto out;

        /* For BM PHY this bit is downshift enable */
        if (phy->type != e1000_phy_bm)
                phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;

        /*
         * Options:
         *   MDI/MDI-X = 0 (default)
         *   0 - Auto for all speeds
         *   1 - MDI mode
         *   2 - MDI-X mode
         *   3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes)
         */
        phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;

        switch (phy->mdix) {
        case 1:
                phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE;
                break;
        case 2:
                phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE;
                break;
        case 3:
                phy_data |= M88E1000_PSCR_AUTO_X_1000T;
                break;
        case 0:
        default:
                phy_data |= M88E1000_PSCR_AUTO_X_MODE;
                break;
        }

        /*
         * Options:
         *   disable_polarity_correction = 0 (default)
         *      Automatic Correction for Reversed Cable Polarity
         *   0 - Disabled
         *   1 - Enabled
         */
        phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL;
        if (phy->disable_polarity_correction == 1)
                phy_data |= M88E1000_PSCR_POLARITY_REVERSAL;

        /* Enable downshift on BM (disabled by default) */
        if (phy->type == e1000_phy_bm)
                phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT;

        ret_val = phy->ops.write_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
        if (ret_val)
                goto out;

        if ((phy->type == e1000_phy_m88) &&
            (phy->revision < E1000_REVISION_4) &&
            (phy->id != BME1000_E_PHY_ID_R2)) {
                /*
                 * Force TX_CLK in the Extended PHY Specific Control Register
                 * to 25MHz clock.
                 */
                ret_val = phy->ops.read_reg(hw,
                    M88E1000_EXT_PHY_SPEC_CTRL,
                    &phy_data);
                if (ret_val)
                        goto out;

                phy_data |= M88E1000_EPSCR_TX_CLK_25;

                if ((phy->revision == E1000_REVISION_2) &&
                    (phy->id == M88E1111_I_PHY_ID)) {
                        /* 82573L PHY - set the downshift counter to 5x. */
                        phy_data &= ~M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK;
                        phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;
                } else {
                        /* Configure Master and Slave downshift values */
                        phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK |
                            M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK);
                        phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X |
                            M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X);
                }
                ret_val = phy->ops.write_reg(hw,
                    M88E1000_EXT_PHY_SPEC_CTRL,
                    phy_data);
                if (ret_val)
                        goto out;
        }

        if ((phy->type == e1000_phy_bm) && (phy->id == BME1000_E_PHY_ID_R2)) {
                /* Set PHY page 0, register 29 to 0x0003 */
                ret_val = phy->ops.write_reg(hw, 29, 0x0003);
                if (ret_val)
                        goto out;

                /* Set PHY page 0, register 30 to 0x0000 */
                ret_val = phy->ops.write_reg(hw, 30, 0x0000);
                if (ret_val)
                        goto out;
        }

        /* Commit the changes. */
        ret_val = phy->ops.commit(hw);
        if (ret_val) {
                DEBUGOUT("Error committing the PHY changes\n");
                goto out;
        }

        if (phy->type == e1000_phy_82578) {
                ret_val = phy->ops.read_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
                    &phy_data);
                if (ret_val)
                        goto out;

                /* 82578 PHY - set the downshift count to 1x. */
                phy_data |= I82578_EPSCR_DOWNSHIFT_ENABLE;
                phy_data &= ~I82578_EPSCR_DOWNSHIFT_COUNTER_MASK;
                ret_val = phy->ops.write_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
                    phy_data);
                if (ret_val)
                        goto out;
}

out:
        return (ret_val);
}

/*
 * e1000_copper_link_setup_igp - Setup igp PHY's for copper link
 * @hw: pointer to the HW structure
 *
 * Sets up LPLU, MDI/MDI-X, polarity, Smartspeed and Master/Slave config for
 * igp PHY's.
 */
s32
e1000_copper_link_setup_igp(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data;

        DEBUGFUNC("e1000_copper_link_setup_igp");

        if (phy->reset_disable) {
                ret_val = E1000_SUCCESS;
                goto out;
        }

        ret_val = hw->phy.ops.reset(hw);
        if (ret_val) {
                DEBUGOUT("Error resetting the PHY.\n");
                goto out;
        }

        /*
         * Wait 100ms for MAC to configure PHY from NVM settings, to avoid
         * timeout issues when LFS is enabled.
         */
        msec_delay(100);

        /*
         * The NVM settings will configure LPLU in D3 for non-IGP1 PHYs.
         */
        if (phy->type == e1000_phy_igp) {
                /* disable lplu d3 during driver init */
                ret_val = hw->phy.ops.set_d3_lplu_state(hw, false);
                if (ret_val) {
                        DEBUGOUT("Error Disabling LPLU D3\n");
                        goto out;
                }
        }

        /* disable lplu d0 during driver init */
        if (hw->phy.ops.set_d0_lplu_state) {
                ret_val = hw->phy.ops.set_d0_lplu_state(hw, false);
                if (ret_val) {
                        DEBUGOUT("Error Disabling LPLU D0\n");
                        goto out;
                }
        }
        /* Configure mdi-mdix settings */
        ret_val = phy->ops.read_reg(hw, IGP01E1000_PHY_PORT_CTRL, &data);
        if (ret_val)
                goto out;

        data &= ~IGP01E1000_PSCR_AUTO_MDIX;

        switch (phy->mdix) {
        case 1:
                data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
                break;
        case 2:
                data |= IGP01E1000_PSCR_FORCE_MDI_MDIX;
                break;
        case 0:
        default:
                data |= IGP01E1000_PSCR_AUTO_MDIX;
                break;
        }
        ret_val = phy->ops.write_reg(hw, IGP01E1000_PHY_PORT_CTRL, data);
        if (ret_val)
                goto out;

        /* set auto-master slave resolution settings */
        if (hw->mac.autoneg) {
                /*
                 * when autonegotiation advertisement is only 1000Mbps then we
                 * should disable SmartSpeed and enable Auto MasterSlave
                 * resolution as hardware default.
                 */
                if (phy->autoneg_advertised == ADVERTISE_1000_FULL) {
                        /* Disable SmartSpeed */
                        ret_val = phy->ops.read_reg(hw,
                            IGP01E1000_PHY_PORT_CONFIG,
                            &data);
                        if (ret_val)
                                goto out;

                        data &= ~IGP01E1000_PSCFR_SMART_SPEED;
                        ret_val = phy->ops.write_reg(hw,
                            IGP01E1000_PHY_PORT_CONFIG,
                            data);
                        if (ret_val)
                                goto out;

                        /* Set auto Master/Slave resolution process */
                        ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL, &data);
                        if (ret_val)
                                goto out;

                        data &= ~CR_1000T_MS_ENABLE;
                        ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL, data);
                        if (ret_val)
                                goto out;
                }

                ret_val = phy->ops.read_reg(hw, PHY_1000T_CTRL, &data);
                if (ret_val)
                        goto out;

                /* load defaults for future use */
                phy->original_ms_type = (data & CR_1000T_MS_ENABLE) ?
                    ((data & CR_1000T_MS_VALUE) ?
                    e1000_ms_force_master :
                    e1000_ms_force_slave) :
                    e1000_ms_auto;

                switch (phy->ms_type) {
                case e1000_ms_force_master:
                        data |= (CR_1000T_MS_ENABLE | CR_1000T_MS_VALUE);
                        break;
                case e1000_ms_force_slave:
                        data |= CR_1000T_MS_ENABLE;
                        data &= ~(CR_1000T_MS_VALUE);
                        break;
                case e1000_ms_auto:
                        data &= ~CR_1000T_MS_ENABLE;
                default:
                        break;
                }
                ret_val = phy->ops.write_reg(hw, PHY_1000T_CTRL, data);
                if (ret_val)
                        goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_copper_link_autoneg - Setup/Enable autoneg for copper link
 * @hw: pointer to the HW structure
 *
 * Performs initial bounds checking on autoneg advertisement parameter, then
 * configure to advertise the full capability.  Setup the PHY to autoneg
 * and restart the negotiation process between the link partner.  If
 * autoneg_wait_to_complete, then wait for autoneg to complete before exiting.
 */
s32
e1000_copper_link_autoneg(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_ctrl;

        DEBUGFUNC("e1000_copper_link_autoneg");

        /*
         * Perform some bounds checking on the autoneg advertisement
         * parameter.
         */
        phy->autoneg_advertised &= phy->autoneg_mask;

        /*
         * If autoneg_advertised is zero, we assume it was not defaulted by
         * the calling code so we set to advertise full capability.
         */
        if (phy->autoneg_advertised == 0)
                phy->autoneg_advertised = phy->autoneg_mask;

        DEBUGOUT("Reconfiguring auto-neg advertisement params\n");
        ret_val = e1000_phy_setup_autoneg(hw);
        if (ret_val) {
                DEBUGOUT("Error Setting up Auto-Negotiation\n");
                goto out;
        }
        DEBUGOUT("Restarting Auto-Neg\n");

        /*
         * Restart auto-negotiation by setting the Auto Neg Enable bit and the
         * Auto Neg Restart bit in the PHY control register.
         */
        ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);
        if (ret_val)
                goto out;

        phy_ctrl |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG);
        ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_ctrl);
        if (ret_val)
                goto out;

        /*
         * Does the user want to wait for Auto-Neg to complete here, or check
         * at a later time (for example, callback routine).
         */
        if (phy->autoneg_wait_to_complete) {
                ret_val = hw->mac.ops.wait_autoneg(hw);
                if (ret_val) {
                        DEBUGOUT("Error while waiting for "
                            "autoneg to complete\n");
                        goto out;
                }
        }

        hw->mac.get_link_status = true;

out:
        return (ret_val);
}

/*
 * e1000_phy_setup_autoneg - Configure PHY for auto-negotiation
 * @hw: pointer to the HW structure
 *
 * Reads the MII auto-neg advertisement register and/or the 1000T control
 * register and if the PHY is already setup for auto-negotiation, then
 * return successful.  Otherwise, setup advertisement and flow control to
 * the appropriate values for the wanted auto-negotiation.
 */
s32
e1000_phy_setup_autoneg(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 mii_autoneg_adv_reg;
        u16 mii_1000t_ctrl_reg = 0;

        DEBUGFUNC("e1000_phy_setup_autoneg");

        phy->autoneg_advertised &= phy->autoneg_mask;

        /* Read the MII Auto-Neg Advertisement Register (Address 4). */
        ret_val = phy->ops.read_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);
        if (ret_val)
                goto out;

        if (phy->autoneg_mask & ADVERTISE_1000_FULL) {
                /* Read the MII 1000Base-T Control Register (Address 9). */
                ret_val = phy->ops.read_reg(hw,
                    PHY_1000T_CTRL,
                    &mii_1000t_ctrl_reg);
                if (ret_val)
                        goto out;
        }

        /*
         * Need to parse both autoneg_advertised and fc and set up the
         * appropriate PHY registers.  First we will parse for
         * autoneg_advertised software override.  Since we can advertise a
         * plethora of combinations, we need to check each bit individually.
         */

        /*
         * First we clear all the 10/100 mb speed bits in the Auto-Neg
         * Advertisement Register (Address 4) and the 1000 mb speed bits in
         * the  1000Base-T Control Register (Address 9).
         */
        mii_autoneg_adv_reg &= ~(NWAY_AR_100TX_FD_CAPS |
            NWAY_AR_100TX_HD_CAPS |
            NWAY_AR_10T_FD_CAPS |
            NWAY_AR_10T_HD_CAPS);
        mii_1000t_ctrl_reg &= ~(CR_1000T_HD_CAPS | CR_1000T_FD_CAPS);

        DEBUGOUT1("autoneg_advertised %x\n", phy->autoneg_advertised);

        /* Do we want to advertise 10 Mb Half Duplex? */
        if (phy->autoneg_advertised & ADVERTISE_10_HALF) {
                DEBUGOUT("Advertise 10mb Half duplex\n");
                mii_autoneg_adv_reg |= NWAY_AR_10T_HD_CAPS;
        }

        /* Do we want to advertise 10 Mb Full Duplex? */
        if (phy->autoneg_advertised & ADVERTISE_10_FULL) {
                DEBUGOUT("Advertise 10mb Full duplex\n");
                mii_autoneg_adv_reg |= NWAY_AR_10T_FD_CAPS;
        }

        /* Do we want to advertise 100 Mb Half Duplex? */
        if (phy->autoneg_advertised & ADVERTISE_100_HALF) {
                DEBUGOUT("Advertise 100mb Half duplex\n");
                mii_autoneg_adv_reg |= NWAY_AR_100TX_HD_CAPS;
        }

        /* Do we want to advertise 100 Mb Full Duplex? */
        if (phy->autoneg_advertised & ADVERTISE_100_FULL) {
                DEBUGOUT("Advertise 100mb Full duplex\n");
                mii_autoneg_adv_reg |= NWAY_AR_100TX_FD_CAPS;
        }

        /* We do not allow the Phy to advertise 1000 Mb Half Duplex */
        if (phy->autoneg_advertised & ADVERTISE_1000_HALF) {
                /* EMPTY */
                DEBUGOUT("Advertise 1000mb Half duplex request denied!\n");
        }

        /* Do we want to advertise 1000 Mb Full Duplex? */
        if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {
                DEBUGOUT("Advertise 1000mb Full duplex\n");
                mii_1000t_ctrl_reg |= CR_1000T_FD_CAPS;
        }

        /*
         * Check for a software override of the flow control settings, and
         * setup the PHY advertisement registers accordingly.  If
         * auto-negotiation is enabled, then software will have to set the
         * "PAUSE" bits to the correct value in the Auto-Negotiation
         * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto-
         * negotiation.
         *
         * The possible values of the "fc" parameter are:
         * 0:   Flow control is completely disabled
         * 1:   Rx flow control is enabled (we can receive pause frames
         *      but not send pause frames).
         * 2:   Tx flow control is enabled (we can send pause frames
         *      but we do not support receiving pause frames).
         * 3:   Both Rx and Tx flow control (symmetric) are enabled.
         * other: No software override.  The flow control configuration
         *      in the EEPROM is used.
         */
        switch (hw->fc.current_mode) {
        case e1000_fc_none:
                /*
                 * Flow control (Rx & Tx) is completely disabled by a software
                 * over-ride.
                 */
                mii_autoneg_adv_reg &= ~(NWAY_AR_ASM_DIR | NWAY_AR_PAUSE);
                break;
        case e1000_fc_rx_pause:
                /*
                 * Rx Flow control is enabled, and Tx Flow control is
                 * disabled, by a software over-ride.
                 *
                 * Since there really isn't a way to advertise that we are
                 * capable of Rx Pause ONLY, we will advertise that we support
                 * both symmetric and asymmetric Rx PAUSE.  Later (in
                 * e1000_config_fc_after_link_up) we will disable the hw's
                 * ability to send PAUSE frames.
                 */
                mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE);
                break;
        case e1000_fc_tx_pause:
                /*
                 * Tx Flow control is enabled, and Rx Flow control is
                 * disabled, by a software over-ride.
                 */
                mii_autoneg_adv_reg |= NWAY_AR_ASM_DIR;
                mii_autoneg_adv_reg &= ~NWAY_AR_PAUSE;
                break;
        case e1000_fc_full:
                /*
                 * Flow control (both Rx and Tx) is enabled by a software
                 * over-ride.
                 */
                mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE);
                break;
        default:
                DEBUGOUT("Flow control param set incorrectly\n");
                ret_val = -E1000_ERR_CONFIG;
                goto out;
        }

        ret_val = phy->ops.write_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg);
        if (ret_val)
                goto out;

        DEBUGOUT1("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);

        if (phy->autoneg_mask & ADVERTISE_1000_FULL) {
                ret_val = phy->ops.write_reg(hw,
                    PHY_1000T_CTRL,
                    mii_1000t_ctrl_reg);
                if (ret_val)
                        goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_setup_copper_link_generic - Configure copper link settings
 * @hw: pointer to the HW structure
 *
 * Calls the appropriate function to configure 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.  If link is
 * not established, we return -E1000_ERR_PHY (-2).
 */
s32
e1000_setup_copper_link_generic(struct e1000_hw *hw)
{
        s32 ret_val;
        bool link;

        DEBUGFUNC("e1000_setup_copper_link_generic");

        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 = hw->phy.ops.force_speed_duplex(hw);
                if (ret_val) {
                        DEBUGOUT("Error Forcing Speed and Duplex\n");
                        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");
                e1000_config_collision_dist_generic(hw);
                ret_val = e1000_config_fc_after_link_up_generic(hw);
        } else {
                /* EMPTY */
                DEBUGOUT("Unable to establish link!!!\n");
        }

out:
        return (ret_val);
}

/*
 * e1000_phy_force_speed_duplex_igp - Force speed/duplex for igp PHY
 * @hw: pointer to the HW structure
 *
 * Calls the PHY setup function to force speed and duplex.  Clears the
 * auto-crossover to force MDI manually.  Waits for link and returns
 * successful if link up is successful, else -E1000_ERR_PHY (-2).
 */
s32
e1000_phy_force_speed_duplex_igp(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data;
        bool link;

        DEBUGFUNC("e1000_phy_force_speed_duplex_igp");

        ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_data);
        if (ret_val)
                goto out;

        e1000_phy_force_speed_duplex_setup(hw, &phy_data);

        ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_data);
        if (ret_val)
                goto out;

        /*
         * Clear Auto-Crossover to force MDI manually.  IGP requires MDI
         * forced whenever speed and duplex are forced.
         */
        ret_val = phy->ops.read_reg(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data);
        if (ret_val)
                goto out;

        phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX;
        phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;

        ret_val = phy->ops.write_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data);
        if (ret_val)
                goto out;

        DEBUGOUT1("IGP PSCR: %X\n", phy_data);

        usec_delay(1);

        if (phy->autoneg_wait_to_complete) {
                DEBUGOUT("Waiting for forced speed/duplex link on IGP phy.\n");

                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT,
                    100000,
                    &link);
                if (ret_val)
                        goto out;

                if (!link) {
                        /* EMPTY */
                        DEBUGOUT("Link taking longer than expected.\n");
                }

                /* Try once more */
                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT,
                    100000,
                    &link);
                if (ret_val)
                        goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_phy_force_speed_duplex_m88 - Force speed/duplex for m88 PHY
 * @hw: pointer to the HW structure
 *
 * Calls the PHY setup function to force speed and duplex.  Clears the
 * auto-crossover to force MDI manually.  Resets the PHY to commit the
 * changes.  If time expires while waiting for link up, we reset the DSP.
 * After reset, TX_CLK and CRS on Tx must be set.  Return successful upon
 * successful completion, else return corresponding error code.
 */
s32
e1000_phy_force_speed_duplex_m88(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data;
        bool link;

        DEBUGFUNC("e1000_phy_force_speed_duplex_m88");

        /*
         * Clear Auto-Crossover to force MDI manually.  M88E1000 requires MDI
         * forced whenever speed and duplex are forced.
         */
        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
        if (ret_val)
                goto out;

        phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
        ret_val = phy->ops.write_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
        if (ret_val)
                goto out;

        DEBUGOUT1("M88E1000 PSCR: %X\n", phy_data);

        ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_data);
        if (ret_val)
                goto out;

        e1000_phy_force_speed_duplex_setup(hw, &phy_data);

        ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_data);
        if (ret_val)
                goto out;

        /* Reset the phy to commit changes. */
        ret_val = hw->phy.ops.commit(hw);
        if (ret_val)
                goto out;

        if (phy->autoneg_wait_to_complete) {
                DEBUGOUT("Waiting for forced speed/duplex link on M88 phy.\n");

                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT,
                    100000,
                    &link);
                if (ret_val)
                        goto out;

                if (!link) {
                        /*
                         * We didn't get link. Reset the DSP and cross our
                         * fingers.
                         */
                        ret_val = phy->ops.write_reg(hw,
                            M88E1000_PHY_PAGE_SELECT,
                            0x001d);
                        if (ret_val)
                                goto out;
                        ret_val = e1000_phy_reset_dsp_generic(hw);
                        if (ret_val)
                                goto out;
                }
                /* Try once more */
                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT,
                    100000,
                    &link);
                if (ret_val)
                        goto out;
        }
        ret_val = phy->ops.read_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
        if (ret_val)
                goto out;

        /*
         * Resetting the phy means we need to re-force TX_CLK in the Extended
         * PHY Specific Control Register to 25MHz clock from the reset value
         * of 2.5MHz.
         */
        phy_data |= M88E1000_EPSCR_TX_CLK_25;
        ret_val = phy->ops.write_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
        if (ret_val)
                goto out;

        /*
         * In addition, we must re-enable CRS on Tx for both half and full
         * duplex.
         */
        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
        if (ret_val)
                goto out;

        phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
        ret_val = phy->ops.write_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);

out:
        return (ret_val);
}

/*
 * e1000_phy_force_speed_duplex_ife - Force PHY speed & duplex
 * @hw: pointer to the HW structure
 *
 * Forces the speed and duplex settings of the PHY.
 * This is a function pointer entry point only called by
 * PHY setup routines.
 */
s32
e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data;
        bool link;

        DEBUGFUNC("e1000_phy_force_speed_duplex_ife");

        if (phy->type != e1000_phy_ife) {
                ret_val = e1000_phy_force_speed_duplex_igp(hw);
                goto out;
        }

        ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &data);
        if (ret_val)
                goto out;

        e1000_phy_force_speed_duplex_setup(hw, &data);

        ret_val = phy->ops.write_reg(hw, PHY_CONTROL, data);
        if (ret_val)
                goto out;

        /* Disable MDI-X support for 10/100 */
        ret_val = phy->ops.read_reg(hw, IFE_PHY_MDIX_CONTROL, &data);
        if (ret_val)
                goto out;

        data &= ~IFE_PMC_AUTO_MDIX;
        data &= ~IFE_PMC_FORCE_MDIX;

        ret_val = phy->ops.write_reg(hw, IFE_PHY_MDIX_CONTROL, data);
        if (ret_val)
                goto out;

        DEBUGOUT1("IFE PMC: %X\n", data);

        usec_delay(1);

        if (phy->autoneg_wait_to_complete) {
                DEBUGOUT("Waiting for forced speed/duplex link on IFE phy.\n");

                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT, 100000, &link);
                if (ret_val)
                        goto out;

                if (!link) {
                        /* EMPTY */
                        DEBUGOUT("Link taking longer than expected.\n");
                }

                /* Try once more */
                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT, 100000, &link);
                if (ret_val)
                        goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_phy_force_speed_duplex_setup - Configure forced PHY speed/duplex
 * @hw: pointer to the HW structure
 * @phy_ctrl: pointer to current value of PHY_CONTROL
 *
 * Forces speed and duplex on the PHY by doing the following: disable flow
 * control, force speed/duplex on the MAC, disable auto speed detection,
 * disable auto-negotiation, configure duplex, configure speed, configure
 * the collision distance, write configuration to CTRL register.  The
 * caller must write to the PHY_CONTROL register for these settings to
 * take affect.
 */
void
e1000_phy_force_speed_duplex_setup(struct e1000_hw *hw, u16 *phy_ctrl)
{
        struct e1000_mac_info *mac = &hw->mac;
        u32 ctrl;

        DEBUGFUNC("e1000_phy_force_speed_duplex_setup");

        /* Turn off flow control when forcing speed/duplex */
        hw->fc.current_mode = e1000_fc_none;

        /* Force speed/duplex on the mac */
        ctrl = E1000_READ_REG(hw, E1000_CTRL);
        ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
        ctrl &= ~E1000_CTRL_SPD_SEL;

        /* Disable Auto Speed Detection */
        ctrl &= ~E1000_CTRL_ASDE;

        /* Disable autoneg on the phy */
        *phy_ctrl &= ~MII_CR_AUTO_NEG_EN;

        /* Forcing Full or Half Duplex? */
        if (mac->forced_speed_duplex & E1000_ALL_HALF_DUPLEX) {
                ctrl &= ~E1000_CTRL_FD;
                *phy_ctrl &= ~MII_CR_FULL_DUPLEX;
                DEBUGOUT("Half Duplex\n");
        } else {
                ctrl |= E1000_CTRL_FD;
                *phy_ctrl |= MII_CR_FULL_DUPLEX;
                DEBUGOUT("Full Duplex\n");
        }

        /* Forcing 10mb or 100mb? */
        if (mac->forced_speed_duplex & E1000_ALL_100_SPEED) {
                ctrl |= E1000_CTRL_SPD_100;
                *phy_ctrl |= MII_CR_SPEED_100;
                *phy_ctrl &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_10);
                DEBUGOUT("Forcing 100mb\n");
        } else {
                ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
                /* LINTED */
                *phy_ctrl |= MII_CR_SPEED_10;
                *phy_ctrl &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_100);
                DEBUGOUT("Forcing 10mb\n");
        }

        e1000_config_collision_dist_generic(hw);

        E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
}

/*
 * e1000_set_d3_lplu_state_generic - Sets low power link up state for D3
 * @hw: pointer to the HW structure
 * @active: boolean used to enable/disable lplu
 *
 * Success returns 0, Failure returns 1
 *
 * The low power link up (lplu) state is set to the power management level D3
 * and SmartSpeed is disabled when active is true, else clear lplu for D3
 * and enable Smartspeed.  LPLU and Smartspeed are mutually exclusive.  LPLU
 * is used during Dx states where the power conservation is most important.
 * During driver activity, SmartSpeed should be enabled so performance is
 * maintained.
 */
s32
e1000_set_d3_lplu_state_generic(struct e1000_hw *hw, bool active)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val = E1000_SUCCESS;
        u16 data;

        DEBUGFUNC("e1000_set_d3_lplu_state_generic");

        if (!(hw->phy.ops.read_reg))
                goto out;

        ret_val = phy->ops.read_reg(hw, IGP02E1000_PHY_POWER_MGMT, &data);
        if (ret_val)
                goto out;

        if (!active) {
                data &= ~IGP02E1000_PM_D3_LPLU;
                ret_val = phy->ops.write_reg(hw,
                    IGP02E1000_PHY_POWER_MGMT,
                    data);
                if (ret_val)
                        goto out;
                /*
                 * 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 = phy->ops.read_reg(hw,
                            IGP01E1000_PHY_PORT_CONFIG,
                            &data);
                        if (ret_val)
                                goto out;

                        data |= IGP01E1000_PSCFR_SMART_SPEED;
                        ret_val = phy->ops.write_reg(hw,
                            IGP01E1000_PHY_PORT_CONFIG,
                            data);
                        if (ret_val)
                                goto out;
                } else if (phy->smart_speed == e1000_smart_speed_off) {
                        ret_val = phy->ops.read_reg(hw,
                            IGP01E1000_PHY_PORT_CONFIG,
                            &data);
                        if (ret_val)
                                goto out;

                        data &= ~IGP01E1000_PSCFR_SMART_SPEED;
                        ret_val = phy->ops.write_reg(hw,
                            IGP01E1000_PHY_PORT_CONFIG,
                            data);
                        if (ret_val)
                                goto out;
                }
        } else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) ||
            (phy->autoneg_advertised == E1000_ALL_NOT_GIG) ||
            (phy->autoneg_advertised == E1000_ALL_10_SPEED)) {
                data |= IGP02E1000_PM_D3_LPLU;
                ret_val = phy->ops.write_reg(hw,
                    IGP02E1000_PHY_POWER_MGMT,
                    data);
                if (ret_val)
                        goto out;

                /* When LPLU is enabled, we should disable SmartSpeed */
                ret_val = phy->ops.read_reg(hw,
                    IGP01E1000_PHY_PORT_CONFIG,
                    &data);
                if (ret_val)
                        goto out;

                data &= ~IGP01E1000_PSCFR_SMART_SPEED;
                ret_val = phy->ops.write_reg(hw,
                    IGP01E1000_PHY_PORT_CONFIG,
                    data);
        }

out:
        return (ret_val);
}

/*
 * e1000_check_downshift_generic - Checks whether a downshift in speed occurred
 * @hw: pointer to the HW structure
 *
 * Success returns 0, Failure returns 1
 *
 * A downshift is detected by querying the PHY link health.
 */
s32
e1000_check_downshift_generic(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data, offset, mask;

        DEBUGFUNC("e1000_check_downshift_generic");

        switch (phy->type) {
        case e1000_phy_m88:
        case e1000_phy_gg82563:
        case e1000_phy_bm:
        case e1000_phy_82578:
                offset = M88E1000_PHY_SPEC_STATUS;
                mask = M88E1000_PSSR_DOWNSHIFT;
                break;
        case e1000_phy_igp_2:
        case e1000_phy_igp:
        case e1000_phy_igp_3:
                offset = IGP01E1000_PHY_LINK_HEALTH;
                mask = IGP01E1000_PLHR_SS_DOWNGRADE;
                break;
        default:
                /* speed downshift not supported */
                phy->speed_downgraded = false;
                ret_val = E1000_SUCCESS;
                goto out;
        }

        ret_val = phy->ops.read_reg(hw, offset, &phy_data);

        if (!ret_val)
                phy->speed_downgraded = (phy_data & mask) ? true : false;

out:
        return (ret_val);
}

/*
 * e1000_check_polarity_m88 - Checks the polarity.
 * @hw: pointer to the HW structure
 *
 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
 *
 * Polarity is determined based on the PHY specific status register.
 */
s32
e1000_check_polarity_m88(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data;

        DEBUGFUNC("e1000_check_polarity_m88");

        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_STATUS, &data);

        if (!ret_val)
                phy->cable_polarity = (data & M88E1000_PSSR_REV_POLARITY)
                    ? e1000_rev_polarity_reversed
                    : e1000_rev_polarity_normal;

        return (ret_val);
}

/*
 * e1000_check_polarity_igp - Checks the polarity.
 * @hw: pointer to the HW structure
 *
 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
 *
 * Polarity is determined based on the PHY port status register, and the
 * current speed (since there is no polarity at 100Mbps).
 */
s32
e1000_check_polarity_igp(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data, offset, mask;

        DEBUGFUNC("e1000_check_polarity_igp");

        /*
         * Polarity is determined based on the speed of our connection.
         */
        ret_val = phy->ops.read_reg(hw, IGP01E1000_PHY_PORT_STATUS, &data);
        if (ret_val)
                goto out;

        if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
            IGP01E1000_PSSR_SPEED_1000MBPS) {
                offset = IGP01E1000_PHY_PCS_INIT_REG;
                mask = IGP01E1000_PHY_POLARITY_MASK;
        } else {
                /*
                 * This really only applies to 10Mbps since there is no
                 * polarity for 100Mbps (always 0).
                 */
                offset = IGP01E1000_PHY_PORT_STATUS;
                mask = IGP01E1000_PSSR_POLARITY_REVERSED;
        }

        ret_val = phy->ops.read_reg(hw, offset, &data);

        if (!ret_val)
                phy->cable_polarity = (data & mask)
                    ? e1000_rev_polarity_reversed
                    : e1000_rev_polarity_normal;

out:
        return (ret_val);
}

/*
 * e1000_check_polarity_ife - Check cable polarity for IFE PHY
 * @hw: pointer to the HW structure
 *
 * Polarity is determined on the polarity reversal feature being enabled.
 */
s32
e1000_check_polarity_ife(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data, offset, mask;

        DEBUGFUNC("e1000_check_polarity_ife");

        /*
         * Polarity is determined based on the reversal feature being enabled.
         */
        if (phy->polarity_correction) {
                offset = IFE_PHY_EXTENDED_STATUS_CONTROL;
                mask = IFE_PESC_POLARITY_REVERSED;
        } else {
                offset = IFE_PHY_SPECIAL_CONTROL;
                mask = IFE_PSC_FORCE_POLARITY;
        }

        ret_val = phy->ops.read_reg(hw, offset, &phy_data);

        if (!ret_val)
                phy->cable_polarity = (phy_data & mask)
                    ? e1000_rev_polarity_reversed : e1000_rev_polarity_normal;

        return (ret_val);
}

/*
 * e1000_wait_autoneg_generic - Wait for auto-neg completion
 * @hw: pointer to the HW structure
 *
 * Waits for auto-negotiation to complete or for the auto-negotiation time
 * limit to expire, which ever happens first.
 */
s32
e1000_wait_autoneg_generic(struct e1000_hw *hw)
{
        s32 ret_val = E1000_SUCCESS;
        u16 i, phy_status;

        DEBUGFUNC("e1000_wait_autoneg_generic");

        if (!(hw->phy.ops.read_reg))
                return (E1000_SUCCESS);

        /* Break after autoneg completes or PHY_AUTO_NEG_LIMIT expires. */
        for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {
                ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
                if (ret_val)
                        break;
                ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
                if (ret_val)
                        break;
                if (phy_status & MII_SR_AUTONEG_COMPLETE)
                        break;
                msec_delay(100);
        }

        /*
         * PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation has
         * completed.
         */
        return (ret_val);
}

/*
 * e1000_phy_has_link_generic - Polls PHY for link
 * @hw: pointer to the HW structure
 * @iterations: number of times to poll for link
 * @usec_interval: delay between polling attempts
 * @success: pointer to whether polling was successful or not
 *
 * Polls the PHY status register for link, 'iterations' number of times.
 */
s32
e1000_phy_has_link_generic(struct e1000_hw *hw, u32 iterations,
    u32 usec_interval, bool *success)
{
        s32 ret_val = E1000_SUCCESS;
        u16 i, phy_status;

        DEBUGFUNC("e1000_phy_has_link_generic");

        if (!(hw->phy.ops.read_reg))
                return (E1000_SUCCESS);

        for (i = 0; i < iterations; i++) {
                /*
                 * Some PHYs require the PHY_STATUS register to be read twice
                 * due to the link bit being sticky.  No harm doing it across
                 * the board.
                 */
                ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
                if (ret_val) {
                        /*
                         * If the first read fails, another entity may have
                         * ownership of the resources, wait and try again to
                         * see if they have relinquished the resources yet.
                         */
                        usec_delay(usec_interval);
                }
                ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
                if (ret_val)
                        break;
                if (phy_status & MII_SR_LINK_STATUS)
                        break;
                if (usec_interval >= 1000)
                        msec_delay_irq(usec_interval / 1000);
                else
                        usec_delay(usec_interval);
        }

        *success = (i < iterations) ? true : false;

        return (ret_val);
}

/*
 * e1000_get_cable_length_m88 - Determine cable length for m88 PHY
 * @hw: pointer to the HW structure
 *
 * Reads the PHY specific status register to retrieve the cable length
 * information.  The cable length is determined by averaging the minimum and
 * maximum values to get the "average" cable length.  The m88 PHY has four
 * possible cable length values, which are:
 *      Register Value          Cable Length
 *      0                       < 50 meters
 *      1                       50 - 80 meters
 *      2                       80 - 110 meters
 *      3                       110 - 140 meters
 *      4                       > 140 meters
 */
s32
e1000_get_cable_length_m88(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data, index;

        DEBUGFUNC("e1000_get_cable_length_m88");

        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
        if (ret_val)
                goto out;

        index = (phy_data & M88E1000_PSSR_CABLE_LENGTH) >>
            M88E1000_PSSR_CABLE_LENGTH_SHIFT;

        if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1) {
                ret_val = E1000_ERR_PHY;
                goto out;
        }
        phy->min_cable_length = e1000_m88_cable_length_table[index];
        phy->max_cable_length = e1000_m88_cable_length_table[index + 1];

        phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;

out:
        return (ret_val);
}

/*
 * e1000_get_cable_length_igp_2 - Determine cable length for igp2 PHY
 * @hw: pointer to the HW structure
 *
 * The automatic gain control (agc) normalizes the amplitude of the
 * received signal, adjusting for the attenuation produced by the
 * cable.  By reading the AGC registers, which represent the
 * combination of coarse and fine gain value, the value can be put
 * into a lookup table to obtain the approximate cable length
 * for each channel.
 */
s32
e1000_get_cable_length_igp_2(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val = E1000_SUCCESS;
        u16 phy_data, i, agc_value = 0;
        u16 cur_agc_index, max_agc_index = 0;
        u16 min_agc_index = IGP02E1000_CABLE_LENGTH_TABLE_SIZE - 1;
        u16 agc_reg_array[IGP02E1000_PHY_CHANNEL_NUM] =
                {IGP02E1000_PHY_AGC_A,
                IGP02E1000_PHY_AGC_B,
                IGP02E1000_PHY_AGC_C,
                IGP02E1000_PHY_AGC_D};

        DEBUGFUNC("e1000_get_cable_length_igp_2");

        /* Read the AGC registers for all channels */
        for (i = 0; i < IGP02E1000_PHY_CHANNEL_NUM; i++) {
                ret_val = phy->ops.read_reg(hw, agc_reg_array[i], &phy_data);
                if (ret_val)
                        goto out;

                /*
                 * Getting bits 15:9, which represent the combination of
                 * coarse and fine gain values.  The result is a number that
                 * can be put into the lookup table to obtain the approximate
                 * cable length.
                 */
                cur_agc_index = (phy_data >> IGP02E1000_AGC_LENGTH_SHIFT) &
                    IGP02E1000_AGC_LENGTH_MASK;

                /* Array index bound check. */
                if ((cur_agc_index >= IGP02E1000_CABLE_LENGTH_TABLE_SIZE) ||
                    (cur_agc_index == 0)) {
                        ret_val = -E1000_ERR_PHY;
                        goto out;
                }

                /* Remove min & max AGC values from calculation. */
                if (e1000_igp_2_cable_length_table[min_agc_index] >
                    e1000_igp_2_cable_length_table[cur_agc_index])
                        min_agc_index = cur_agc_index;
                if (e1000_igp_2_cable_length_table[max_agc_index] <
                    e1000_igp_2_cable_length_table[cur_agc_index])
                        max_agc_index = cur_agc_index;

                agc_value += e1000_igp_2_cable_length_table[cur_agc_index];
        }

        agc_value -= (e1000_igp_2_cable_length_table[min_agc_index] +
            e1000_igp_2_cable_length_table[max_agc_index]);
        agc_value /= (IGP02E1000_PHY_CHANNEL_NUM - 2);

        /* Calculate cable length with the error range of +/- 10 meters. */
        phy->min_cable_length = ((agc_value - IGP02E1000_AGC_RANGE) > 0) ?
            (agc_value - IGP02E1000_AGC_RANGE) : 0;
        phy->max_cable_length = agc_value + IGP02E1000_AGC_RANGE;

        phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;

out:
        return (ret_val);
}

/*
 * e1000_get_phy_info_m88 - Retrieve PHY information
 * @hw: pointer to the HW structure
 *
 * Valid for only copper links.  Read the PHY status register (sticky read)
 * to verify that link is up.  Read the PHY special control register to
 * determine the polarity and 10base-T extended distance.  Read the PHY
 * special status register to determine MDI/MDIx and current speed.  If
 * speed is 1000, then determine cable length, local and remote receiver.
 */
s32
e1000_get_phy_info_m88(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data;
        bool link;

        DEBUGFUNC("e1000_get_phy_info_m88");

        if (hw->phy.media_type != e1000_media_type_copper) {
                DEBUGOUT("Phy info is only valid for copper media\n");
                ret_val = -E1000_ERR_CONFIG;
                goto out;
        }

        ret_val = e1000_phy_has_link_generic(hw, 1, 0, &link);
        if (ret_val)
                goto out;

        if (!link) {
                DEBUGOUT("Phy info is only valid if link is up\n");
                ret_val = -E1000_ERR_CONFIG;
                goto out;
        }

        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
        if (ret_val)
                goto out;

        phy->polarity_correction = (phy_data & M88E1000_PSCR_POLARITY_REVERSAL)
            ? true
            : false;

        ret_val = e1000_check_polarity_m88(hw);
        if (ret_val)
                goto out;

        ret_val = phy->ops.read_reg(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
        if (ret_val)
                goto out;

        phy->is_mdix = (phy_data & M88E1000_PSSR_MDIX) ? true : false;

        if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) {
                ret_val = hw->phy.ops.get_cable_length(hw);
                if (ret_val)
                        goto out;

                ret_val = phy->ops.read_reg(hw, PHY_1000T_STATUS, &phy_data);
                if (ret_val)
                        goto out;

                phy->local_rx = (phy_data & SR_1000T_LOCAL_RX_STATUS)
                    ? e1000_1000t_rx_status_ok
                    : e1000_1000t_rx_status_not_ok;

                phy->remote_rx = (phy_data & SR_1000T_REMOTE_RX_STATUS)
                    ? e1000_1000t_rx_status_ok
                    : e1000_1000t_rx_status_not_ok;
        } else {
                /* Set values to "undefined" */
                phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
                phy->local_rx = e1000_1000t_rx_status_undefined;
                phy->remote_rx = e1000_1000t_rx_status_undefined;
        }

out:
        return (ret_val);
}

/*
 * e1000_get_phy_info_igp - Retrieve igp PHY information
 * @hw: pointer to the HW structure
 *
 * Read PHY status to determine if link is up.  If link is up, then
 * set/determine 10base-T extended distance and polarity correction.  Read
 * PHY port status to determine MDI/MDIx and speed.  Based on the speed,
 * determine on the cable length, local and remote receiver.
 */
s32
e1000_get_phy_info_igp(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data;
        bool link;

        DEBUGFUNC("e1000_get_phy_info_igp");

        ret_val = e1000_phy_has_link_generic(hw, 1, 0, &link);
        if (ret_val)
                goto out;

        if (!link) {
                DEBUGOUT("Phy info is only valid if link is up\n");
                ret_val = -E1000_ERR_CONFIG;
                goto out;
        }

        phy->polarity_correction = true;

        ret_val = e1000_check_polarity_igp(hw);
        if (ret_val)
                goto out;

        ret_val = phy->ops.read_reg(hw, IGP01E1000_PHY_PORT_STATUS, &data);
        if (ret_val)
                goto out;

        phy->is_mdix = (data & IGP01E1000_PSSR_MDIX) ? true : false;

        if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
            IGP01E1000_PSSR_SPEED_1000MBPS) {
                ret_val = hw->phy.ops.get_cable_length(hw);
                if (ret_val)
                        goto out;

                ret_val = phy->ops.read_reg(hw, PHY_1000T_STATUS, &data);
                if (ret_val)
                        goto out;

                phy->local_rx = (data & SR_1000T_LOCAL_RX_STATUS)
                    ? e1000_1000t_rx_status_ok
                    : e1000_1000t_rx_status_not_ok;

                phy->remote_rx = (data & SR_1000T_REMOTE_RX_STATUS)
                    ? e1000_1000t_rx_status_ok
                    : e1000_1000t_rx_status_not_ok;
        } else {
                phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
                phy->local_rx = e1000_1000t_rx_status_undefined;
                phy->remote_rx = e1000_1000t_rx_status_undefined;
        }

out:
        return (ret_val);
}

/*
 * e1000_phy_sw_reset_generic - PHY software reset
 * @hw: pointer to the HW structure
 *
 * Does a software reset of the PHY by reading the PHY control register and
 * setting/write the control register reset bit to the PHY.
 */
s32
e1000_phy_sw_reset_generic(struct e1000_hw *hw)
{
        s32 ret_val = E1000_SUCCESS;
        u16 phy_ctrl;

        DEBUGFUNC("e1000_phy_sw_reset_generic");

        if (!(hw->phy.ops.read_reg))
                goto out;

        ret_val = hw->phy.ops.read_reg(hw, PHY_CONTROL, &phy_ctrl);
        if (ret_val)
                goto out;

        phy_ctrl |= MII_CR_RESET;
        ret_val = hw->phy.ops.write_reg(hw, PHY_CONTROL, phy_ctrl);
        if (ret_val)
                goto out;

        usec_delay(1);

out:
        return (ret_val);
}

/*
 * e1000_phy_hw_reset_generic - PHY hardware reset
 * @hw: pointer to the HW structure
 *
 * Verify the reset block is not blocking us from resetting.  Acquire
 * semaphore (if necessary) and read/set/write the device control reset
 * bit in the PHY.  Wait the appropriate delay time for the device to
 * reset and release the semaphore (if necessary).
 */
s32
e1000_phy_hw_reset_generic(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val = E1000_SUCCESS;
        u32 ctrl;

        DEBUGFUNC("e1000_phy_hw_reset_generic");

        ret_val = phy->ops.check_reset_block(hw);
        if (ret_val) {
                ret_val = E1000_SUCCESS;
                goto out;
        }

        ret_val = phy->ops.acquire(hw);
        if (ret_val)
                goto out;

        ctrl = E1000_READ_REG(hw, E1000_CTRL);
        E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_PHY_RST);
        E1000_WRITE_FLUSH(hw);

        usec_delay(phy->reset_delay_us);

        E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
        E1000_WRITE_FLUSH(hw);

        usec_delay(150);

        phy->ops.release(hw);

        ret_val = phy->ops.get_cfg_done(hw);

out:
        return (ret_val);
}

/*
 * e1000_get_cfg_done_generic - Generic configuration done
 * @hw: pointer to the HW structure
 *
 * Generic function to wait 10 milli-seconds for configuration to complete
 * and return success.
 */
s32
e1000_get_cfg_done_generic(struct e1000_hw *hw)
{
        DEBUGFUNC("e1000_get_cfg_done_generic");
        UNREFERENCED_1PARAMETER(hw);

        msec_delay_irq(10);

        return (E1000_SUCCESS);
}

/*
 * e1000_phy_init_script_igp3 - Inits the IGP3 PHY
 * @hw: pointer to the HW structure
 *
 * Initializes a Intel Gigabit PHY3 when an EEPROM is not present.
 */
s32
e1000_phy_init_script_igp3(struct e1000_hw *hw)
{
        DEBUGOUT("Running IGP 3 PHY init script\n");

        /* PHY init IGP 3 */
        /* Enable rise/fall, 10-mode work in class-A */
        hw->phy.ops.write_reg(hw, 0x2F5B, 0x9018);
        /* Remove all caps from Replica path filter */
        hw->phy.ops.write_reg(hw, 0x2F52, 0x0000);
        /* Bias trimming for ADC, AFE and Driver (Default) */
        hw->phy.ops.write_reg(hw, 0x2FB1, 0x8B24);
        /* Increase Hybrid poly bias */
        hw->phy.ops.write_reg(hw, 0x2FB2, 0xF8F0);
        /* Add 4% to TX amplitude in Giga mode */
        hw->phy.ops.write_reg(hw, 0x2010, 0x10B0);
        /* Disable trimming (TTT) */
        hw->phy.ops.write_reg(hw, 0x2011, 0x0000);
        /* Poly DC correction to 94.6% + 2% for all channels */
        hw->phy.ops.write_reg(hw, 0x20DD, 0x249A);
        /* ABS DC correction to 95.9% */
        hw->phy.ops.write_reg(hw, 0x20DE, 0x00D3);
        /* BG temp curve trim */
        hw->phy.ops.write_reg(hw, 0x28B4, 0x04CE);
        /* Increasing ADC OPAMP stage 1 currents to max */
        hw->phy.ops.write_reg(hw, 0x2F70, 0x29E4);
        /* Force 1000 ( required for enabling PHY regs configuration) */
        hw->phy.ops.write_reg(hw, 0x0000, 0x0140);
        /* Set upd_freq to 6 */
        hw->phy.ops.write_reg(hw, 0x1F30, 0x1606);
        /* Disable NPDFE */
        hw->phy.ops.write_reg(hw, 0x1F31, 0xB814);
        /* Disable adaptive fixed FFE (Default) */
        hw->phy.ops.write_reg(hw, 0x1F35, 0x002A);
        /* Enable FFE hysteresis */
        hw->phy.ops.write_reg(hw, 0x1F3E, 0x0067);
        /* Fixed FFE for short cable lengths */
        hw->phy.ops.write_reg(hw, 0x1F54, 0x0065);
        /* Fixed FFE for medium cable lengths */
        hw->phy.ops.write_reg(hw, 0x1F55, 0x002A);
        /* Fixed FFE for long cable lengths */
        hw->phy.ops.write_reg(hw, 0x1F56, 0x002A);
        /* Enable Adaptive Clip Threshold */
        hw->phy.ops.write_reg(hw, 0x1F72, 0x3FB0);
        /* AHT reset limit to 1 */
        hw->phy.ops.write_reg(hw, 0x1F76, 0xC0FF);
        /* Set AHT master delay to 127 msec */
        hw->phy.ops.write_reg(hw, 0x1F77, 0x1DEC);
        /* Set scan bits for AHT */
        hw->phy.ops.write_reg(hw, 0x1F78, 0xF9EF);
        /* Set AHT Preset bits */
        hw->phy.ops.write_reg(hw, 0x1F79, 0x0210);
        /* Change integ_factor of channel A to 3 */
        hw->phy.ops.write_reg(hw, 0x1895, 0x0003);
        /* Change prop_factor of channels BCD to 8 */
        hw->phy.ops.write_reg(hw, 0x1796, 0x0008);
        /* Change cg_icount + enable integbp for channels BCD */
        hw->phy.ops.write_reg(hw, 0x1798, 0xD008);
        /*
         * Change cg_icount + enable integbp + change prop_factor_master to 8
         * for channel A
         */
        hw->phy.ops.write_reg(hw, 0x1898, 0xD918);
        /* Disable AHT in Slave mode on channel A */
        hw->phy.ops.write_reg(hw, 0x187A, 0x0800);
        /*
         * Enable LPLU and disable AN to 1000 in non-D0a states, Enable
         * SPD+B2B
         */
        hw->phy.ops.write_reg(hw, 0x0019, 0x008D);
        /* Enable restart AN on an1000_dis change */
        hw->phy.ops.write_reg(hw, 0x001B, 0x2080);
        /* Enable wh_fifo read clock in 10/100 modes */
        hw->phy.ops.write_reg(hw, 0x0014, 0x0045);
        /* Restart AN, Speed selection is 1000 */
        hw->phy.ops.write_reg(hw, 0x0000, 0x1340);

        return (E1000_SUCCESS);
}

/*
 * e1000_get_phy_type_from_id - Get PHY type from id
 * @phy_id: phy_id read from the phy
 *
 * Returns the phy type from the id.
 */
enum e1000_phy_type
e1000_get_phy_type_from_id(u32 phy_id)
{
        enum e1000_phy_type phy_type = e1000_phy_unknown;

        switch (phy_id) {
        case M88E1000_I_PHY_ID:
        case M88E1000_E_PHY_ID:
        case M88E1111_I_PHY_ID:
        case M88E1011_I_PHY_ID:
                phy_type = e1000_phy_m88;
                break;
        case IGP01E1000_I_PHY_ID:       /* IGP 1 & 2 share this */
                phy_type = e1000_phy_igp_2;
                break;
        case GG82563_E_PHY_ID:
                phy_type = e1000_phy_gg82563;
                break;
        case IGP03E1000_E_PHY_ID:
                phy_type = e1000_phy_igp_3;
                break;
        case IFE_E_PHY_ID:
        case IFE_PLUS_E_PHY_ID:
        case IFE_C_E_PHY_ID:
                phy_type = e1000_phy_ife;
                break;
        case BME1000_E_PHY_ID:
        case BME1000_E_PHY_ID_R2:
                phy_type = e1000_phy_bm;
                break;
        case I82578_E_PHY_ID:
                phy_type = e1000_phy_82578;
                break;
        case I82577_E_PHY_ID:
                phy_type = e1000_phy_82577;
                break;
        case I82579_E_PHY_ID:
                phy_type = e1000_phy_82579;
                break;
        default:
                phy_type = e1000_phy_unknown;
                break;
        }
        return (phy_type);
}

/*
 * e1000_determine_phy_address - Determines PHY address.
 * @hw: pointer to the HW structure
 *
 * This uses a trial and error method to loop through possible PHY
 * addresses. It tests each by reading the PHY ID registers and
 * checking for a match.
 */
s32
e1000_determine_phy_address(struct e1000_hw *hw)
{
        s32 ret_val = -E1000_ERR_PHY_TYPE;
        u32 phy_addr = 0;
        u32 i;
        enum e1000_phy_type phy_type = e1000_phy_unknown;

        hw->phy.id = phy_type;

        for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) {
                hw->phy.addr = phy_addr;
                i = 0;

                do {
                        (void) e1000_get_phy_id(hw);
                        phy_type = e1000_get_phy_type_from_id(hw->phy.id);

                        /*
                         * If phy_type is valid, break - we found our
                         * PHY address
                         */
                        if (phy_type != e1000_phy_unknown) {
                                ret_val = E1000_SUCCESS;
                                goto out;
                        }
                        msec_delay(1);
                        i++;
                } while (i < 10);
        }

out:
        return (ret_val);
}

/*
 * e1000_get_phy_addr_for_bm_page - Retrieve PHY page address
 * @page: page to access
 *
 * Returns the phy address for the page requested.
 */
static u32
e1000_get_phy_addr_for_bm_page(u32 page, u32 reg)
{
        u32 phy_addr = 2;

        if ((page >= 768) || (page == 0 && reg == 25) || (reg == 31))
                phy_addr = 1;

        return (phy_addr);
}

/*
 * e1000_write_phy_reg_bm - Write BM PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Acquires semaphore, if necessary, then writes the data to PHY register
 * at the offset.  Release any acquired semaphores before exiting.
 */
s32
e1000_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
{
        s32 ret_val;
        u32 page_select = 0;
        u32 page = offset >> IGP_PAGE_SHIFT;
        u32 page_shift = 0;

        DEBUGFUNC("e1000_write_phy_reg_bm");

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val)
                goto out;

        /* Page 800 works differently than the rest so it has its own func */
        if (page == BM_WUC_PAGE) {
                ret_val = e1000_access_phy_wakeup_reg_bm(hw,
                    offset, &data, false);
                goto out;
        }

        hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);

        if (offset > MAX_PHY_MULTI_PAGE_REG) {
                /*
                 * Page select is register 31 for phy address 1 and 22 for phy
                 * address 2 and 3. Page select is shifted only for phy
                 * address 1.
                 */
                if (hw->phy.addr == 1) {
                        page_shift = IGP_PAGE_SHIFT;
                        page_select = IGP01E1000_PHY_PAGE_SELECT;
                } else {
                        page_shift = 0;
                        page_select = BM_PHY_PAGE_SELECT;
                }

                /* Page is shifted left, PHY expects (page x 32) */
                ret_val = e1000_write_phy_reg_mdic(hw, page_select,
                    (page << page_shift));
                if (ret_val)
                        goto out;
        }

        ret_val = e1000_write_phy_reg_mdic(hw,
            MAX_PHY_REG_ADDRESS & offset,
            data);

out:
        hw->phy.ops.release(hw);
        return (ret_val);
}

/*
 * e1000_read_phy_reg_bm - Read BM PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Acquires semaphore, if necessary, then reads the PHY register at offset
 * and storing the retrieved information in data.  Release any acquired
 * semaphores before exiting.
 */
s32
e1000_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
{
        s32 ret_val;
        u32 page_select = 0;
        u32 page = offset >> IGP_PAGE_SHIFT;
        u32 page_shift = 0;

        DEBUGFUNC("e1000_read_phy_reg_bm");

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val)
                goto out;

        /* Page 800 works differently than the rest so it has its own func */
        if (page == BM_WUC_PAGE) {
                ret_val = e1000_access_phy_wakeup_reg_bm(hw,
                    offset, data, true);
                goto out;
        }

        hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);

        if (offset > MAX_PHY_MULTI_PAGE_REG) {
                /*
                 * Page select is register 31 for phy address 1 and 22 for phy
                 * address 2 and 3. Page select is shifted only for phy
                 * address 1.
                 */
                if (hw->phy.addr == 1) {
                        page_shift = IGP_PAGE_SHIFT;
                        page_select = IGP01E1000_PHY_PAGE_SELECT;
                } else {
                        page_shift = 0;
                        page_select = BM_PHY_PAGE_SELECT;
                }

                /* Page is shifted left, PHY expects (page x 32) */
                ret_val = e1000_write_phy_reg_mdic(hw, page_select,
                    (page << page_shift));
                if (ret_val)
                        goto out;
        }

        ret_val = e1000_read_phy_reg_mdic(hw,
            MAX_PHY_REG_ADDRESS & offset,
            data);

out:
        hw->phy.ops.release(hw);
        return (ret_val);
}

/*
 * e1000_read_phy_reg_bm2 - Read BM PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Acquires semaphore, if necessary, then reads the PHY register at offset
 * and storing the retrieved information in data.  Release any acquired
 * semaphores before exiting.
 */
s32
e1000_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data)
{
        s32 ret_val;
        u16 page = (u16)(offset >> IGP_PAGE_SHIFT);

        DEBUGFUNC("e1000_write_phy_reg_bm2");

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val)
                goto out;

        /* Page 800 works differently than the rest so it has its own func */
        if (page == BM_WUC_PAGE) {
                ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
                    true);
                goto out;
        }

        hw->phy.addr = 1;

        if (offset > MAX_PHY_MULTI_PAGE_REG) {

                /* Page is shifted left, PHY expects (page x 32) */
                ret_val = e1000_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
                    page);

                if (ret_val)
                        goto out;
        }

        ret_val = e1000_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
            data);

out:
        hw->phy.ops.release(hw);
        return (ret_val);
}

/*
 * e1000_write_phy_reg_bm2 - Write BM PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Acquires semaphore, if necessary, then writes the data to PHY register
 * at the offset.  Release any acquired semaphores before exiting.
 */
s32
e1000_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data)
{
        s32 ret_val;
        u16 page = (u16)(offset >> IGP_PAGE_SHIFT);

        DEBUGFUNC("e1000_write_phy_reg_bm2");

        ret_val = hw->phy.ops.acquire(hw);
        if (ret_val)
                goto out;

        /* Page 800 works differently than the rest so it has its own func */
        if (page == BM_WUC_PAGE) {
                ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
                    false);
                goto out;
        }

        hw->phy.addr = 1;

        if (offset > MAX_PHY_MULTI_PAGE_REG) {
                /* Page is shifted left, PHY expects (page x 32) */
                ret_val = e1000_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
                    page);

                if (ret_val)
                        goto out;
        }

        ret_val = e1000_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
            data);

out:
        hw->phy.ops.release(hw);
        return (ret_val);
}

/*
 * e1000_access_phy_wakeup_reg_bm - Read BM PHY wakeup register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read or written
 * @data: pointer to the data to read or write
 * @read: determines if operation is read or write
 *
 * Acquires semaphore, if necessary, then reads the PHY register at offset
 * and storing the retrieved information in data.  Release any acquired
 * semaphores before exiting. Note that procedure to read the wakeup
 * registers are different. It works as such:
 * 1) Set page 769, register 17, bit 2 = 1
 * 2) Set page to 800 for host (801 if we were manageability)
 * 3) Write the address using the address opcode (0x11)
 * 4) Read or write the data using the data opcode (0x12)
 * 5) Restore 769_17.2 to its original value
 *
 * Assumes semaphore already acquired.
 */
static s32
e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw,
    u32 offset, u16 *data, bool read)
{
        s32 ret_val;
        u16 reg = BM_PHY_REG_NUM(offset);
        u16 phy_reg = 0;

        DEBUGFUNC("e1000_access_phy_wakeup_reg_bm");

        /* Gig must be disabled for MDIO accesses to page 800 */
        if ((hw->mac.type == e1000_pchlan) &&
            (!(E1000_READ_REG(hw, E1000_PHY_CTRL) &
            E1000_PHY_CTRL_GBE_DISABLE))) {
                /* EMPTY */
                DEBUGOUT("Attempting to access page 800 while gig enabled.\n");
        }

        /* All operations in this function are phy address 1 */
        hw->phy.addr = 1;

        /* Set page 769 */
        (void) e1000_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
            (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));

        ret_val = e1000_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
        if (ret_val) {
                DEBUGOUT("Could not read PHY page 769\n");
                goto out;
        }

        /* First clear bit 4 to avoid a power state change */
        phy_reg &= ~(BM_WUC_HOST_WU_BIT);
        ret_val = e1000_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
        if (ret_val) {
                DEBUGOUT("Could not clear PHY page 769 bit 4\n");
                goto out;
        }

        /* Write bit 2 = 1, and clear bit 4 to 769_17 */
        ret_val = e1000_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG,
            phy_reg | BM_WUC_ENABLE_BIT);
        if (ret_val) {
                DEBUGOUT("Could not write PHY page 769 bit 2\n");
                goto out;
        }

        /* Select page 800 */
        ret_val = e1000_write_phy_reg_mdic(hw,
            IGP01E1000_PHY_PAGE_SELECT,
            (BM_WUC_PAGE << IGP_PAGE_SHIFT));

        /* Write the page 800 offset value using opcode 0x11 */
        ret_val = e1000_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg);
        if (ret_val) {
                DEBUGOUT("Could not write address opcode to page 800\n");
                goto out;
        }

        if (read) {
                /* Read the page 800 value using opcode 0x12 */
                ret_val = e1000_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
                    data);
        } else {
                /* Write the page 800 value using opcode 0x12 */
                ret_val = e1000_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
                    *data);
        }

        if (ret_val) {
                DEBUGOUT("Could not access data value from page 800\n");
                goto out;
        }

        /*
         * Restore 769_17.2 to its original value Set page 769
         */
        (void) e1000_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
            (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));

        /* Clear 769_17.2 */
        ret_val = e1000_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
        if (ret_val) {
                DEBUGOUT("Could not clear PHY page 769 bit 2\n");
                goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_power_up_phy_copper - Restore copper link in case of 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, restore the link to previous
 * settings.
 */
void
e1000_power_up_phy_copper(struct e1000_hw *hw)
{
        u16 mii_reg = 0;

        /* The PHY will retain its settings across a power down/up cycle */
        hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
        mii_reg &= ~MII_CR_POWER_DOWN;
        hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
}

/*
 * e1000_power_down_phy_copper - Restore copper link in case of 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, restore the link to previous
 * settings.
 */
void
e1000_power_down_phy_copper(struct e1000_hw *hw)
{
        u16 mii_reg = 0;

        /* The PHY will retain its settings across a power down/up cycle */
        hw->phy.ops.read_reg(hw, PHY_CONTROL, &mii_reg);
        mii_reg |= MII_CR_POWER_DOWN;
        hw->phy.ops.write_reg(hw, PHY_CONTROL, mii_reg);
        msec_delay(1);
}

/*
 * __e1000_read_phy_reg_hv -  Read HV PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 * @locked: semaphore has already been acquired or not
 *
 * Acquires semaphore, if necessary, then reads the PHY register at offset
 * and stores the retrieved information in data.  Release any acquired
 * semaphore before exiting.
 */
static s32
__e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data,
    bool locked)
{
        s32 ret_val;
        u16 page = BM_PHY_REG_PAGE(offset);
        u16 reg = BM_PHY_REG_NUM(offset);

        DEBUGFUNC("__e1000_read_phy_reg_hv");

        if (!locked) {
                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val)
                        return (ret_val);
        }

        /* Page 800 works differently than the rest so it has its own func */
        if (page == BM_WUC_PAGE) {
                ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset,
                    data, true);
                goto out;
        }

        if (page > 0 && page < HV_INTC_FC_PAGE_START) {
                ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
                    data, true);
                goto out;
        }

        hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);

        if (page == HV_INTC_FC_PAGE_START)
                page = 0;

        if (reg > MAX_PHY_MULTI_PAGE_REG) {
                u32 phy_addr = hw->phy.addr;

                hw->phy.addr = 1;

                /* Page is shifted left, PHY expects (page x 32) */
                ret_val = e1000_write_phy_reg_mdic(hw,
                    IGP01E1000_PHY_PAGE_SELECT, (page << IGP_PAGE_SHIFT));
                hw->phy.addr = phy_addr;

                if (ret_val)
                        goto out;
        }

        ret_val = e1000_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, data);
out:
        if (!locked)
                hw->phy.ops.release(hw);

        return (ret_val);
}

/*
 * e1000_read_phy_reg_hv -  Read HV PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Acquires semaphore then reads the PHY register at offset and stores
 * the retrieved information in data.  Release the acquired semaphore
 * before exiting.
 */
s32
e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data)
{
        return (__e1000_read_phy_reg_hv(hw, offset, data, false));
}

/*
 * e1000_read_phy_reg_hv_locked -  Read HV PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to be read
 * @data: pointer to the read data
 *
 * Reads the PHY register at offset and stores the retrieved information
 * in data.  Assumes semaphore already acquired.
 */
s32
e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data)
{
        return (__e1000_read_phy_reg_hv(hw, offset, data, true));
}

/*
 * __e1000_write_phy_reg_hv - Write HV PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 * @locked: semaphore has already been acquired or not
 *
 * Acquires semaphore, if necessary, then writes the data to PHY register
 * at the offset.  Release any acquired semaphores before exiting.
 */
static s32
__e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data,
    bool locked)
{
        s32 ret_val;
        u16 page = BM_PHY_REG_PAGE(offset);
        u16 reg = BM_PHY_REG_NUM(offset);

        DEBUGFUNC("__e1000_write_phy_reg_hv");

        if (!locked) {
                ret_val = hw->phy.ops.acquire(hw);
                if (ret_val)
                        return (ret_val);
        }

        /* Page 800 works differently than the rest so it has its own func */
        if (page == BM_WUC_PAGE) {
                ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset,
                    &data, false);
                goto out;
        }

        if (page > 0 && page < HV_INTC_FC_PAGE_START) {
                ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
                    &data, false);
                goto out;
        }

        hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);

        if (page == HV_INTC_FC_PAGE_START)
                page = 0;

        /*
         * Workaround MDIO accesses being disabled after entering IEEE Power
         * Down (whenever bit 11 of the PHY Control register is set)
         */
        if ((hw->phy.type == e1000_phy_82578) &&
            (hw->phy.revision >= 1) &&
            (hw->phy.addr == 2) &&
            ((MAX_PHY_REG_ADDRESS & reg) == 0) &&
            (data & (1 << 11))) {
                u16 data2 = 0x7EFF;
                ret_val = e1000_access_phy_debug_regs_hv(hw, (1 << 6) | 0x3,
                    &data2, false);
                if (ret_val)
                        goto out;
        }

        if (reg > MAX_PHY_MULTI_PAGE_REG) {
                u32 phy_addr = hw->phy.addr;

                hw->phy.addr = 1;

                /* Page is shifted left, PHY expects (page x 32) */
                ret_val = e1000_write_phy_reg_mdic(hw,
                    IGP01E1000_PHY_PAGE_SELECT, (page << IGP_PAGE_SHIFT));
                hw->phy.addr = phy_addr;

                if (ret_val)
                        goto out;
        }

        ret_val = e1000_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg,
            data);

out:
        if (!locked)
                hw->phy.ops.release(hw);

        return (ret_val);
}

/*
 * e1000_write_phy_reg_hv - Write HV PHY register
 * @hw: pointer to the HW structure
 * @offset: register offset to write to
 * @data: data to write at register offset
 *
 * Acquires semaphore then writes the data to PHY register at the offset.
 * Release the acquired semaphores before exiting.
 */
s32
e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data)
{
        return (__e1000_write_phy_reg_hv(hw, offset, data, false));
}

/*
 * e1000_write_phy_reg_hv_locked - Write HV PHY register
 * @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.  Assumes semaphore
 * already acquired.
 */
s32
e1000_write_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 data)
{
        return (__e1000_write_phy_reg_hv(hw, offset, data, true));
}

/*
 * e1000_get_phy_addr_for_hv_page - Get PHY adrress based on page
 * @page: page to be accessed
 */
static u32
e1000_get_phy_addr_for_hv_page(u32 page)
{
        u32 phy_addr = 2;

        if (page >= HV_INTC_FC_PAGE_START)
                phy_addr = 1;

        return (phy_addr);
}

/*
 * e1000_access_phy_debug_regs_hv - Read HV PHY vendor specific high registers
 * @hw: pointer to the HW structure
 * @offset: register offset to be read or written
 * @data: pointer to the data to be read or written
 * @read: determines if operation is read or written
 *
 * Reads the PHY register at offset and stores the retreived information
 * in data.  Assumes semaphore already acquired.  Note that the procedure
 * to read these regs uses the address port and data port to read/write.
 */
static s32
e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
    u16 *data, bool read)
{
        s32 ret_val;
        u32 addr_reg = 0;
        u32 data_reg = 0;

        DEBUGFUNC("e1000_access_phy_debug_regs_hv");

        /* This takes care of the difference with desktop vs mobile phy */
        addr_reg = (hw->phy.type == e1000_phy_82578) ?
            I82578_ADDR_REG : I82577_ADDR_REG;
        data_reg = addr_reg + 1;

        /* All operations in this function are phy address 2 */
        hw->phy.addr = 2;

        /* masking with 0x3F to remove the page from offset */
        ret_val = e1000_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F);
        if (ret_val) {
                DEBUGOUT("Could not write PHY the HV address register\n");
                goto out;
        }

        /* Read or write the data value next */
        if (read)
                ret_val = e1000_read_phy_reg_mdic(hw, data_reg, data);
        else
                ret_val = e1000_write_phy_reg_mdic(hw, data_reg, *data);

        if (ret_val) {
                DEBUGOUT("Could not read data value from HV data register\n");
                goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_link_stall_workaround_hv - Si workaround
 * @hw: pointer to the HW structure
 *
 * This function works around a Si bug where the link partner can get
 * a link up indication before the PHY does.  If small packets are sent
 * by the link partner they can be placed in the packet buffer without
 * being properly accounted for by the PHY and will stall preventing
 * further packets from being received.  The workaround is to clear the
 * packet buffer after the PHY detects link up.
 */
s32
e1000_link_stall_workaround_hv(struct e1000_hw *hw)
{
        s32 ret_val = E1000_SUCCESS;
        u16 data;

        DEBUGFUNC("e1000_link_stall_workaround_hv");

        if (hw->phy.type != e1000_phy_82578)
                goto out;

        /* Do not apply workaround if in PHY loopback bit 14 set */
        hw->phy.ops.read_reg(hw, PHY_CONTROL, &data);
        if (data & PHY_CONTROL_LB)
                goto out;

        /* check if link is up and at 1Gbps */
        ret_val = hw->phy.ops.read_reg(hw, BM_CS_STATUS, &data);
        if (ret_val)
                goto out;

        data &= BM_CS_STATUS_LINK_UP |
            BM_CS_STATUS_RESOLVED |
            BM_CS_STATUS_SPEED_MASK;

        if (data != (BM_CS_STATUS_LINK_UP |
            BM_CS_STATUS_RESOLVED |
            BM_CS_STATUS_SPEED_1000))
                goto out;

        msec_delay(200);

        /* flush the packets in the fifo buffer */
        ret_val = hw->phy.ops.write_reg(hw, HV_MUX_DATA_CTRL,
            HV_MUX_DATA_CTRL_GEN_TO_MAC | HV_MUX_DATA_CTRL_FORCE_SPEED);
        if (ret_val)
                goto out;

        ret_val = hw->phy.ops.write_reg(hw, HV_MUX_DATA_CTRL,
            HV_MUX_DATA_CTRL_GEN_TO_MAC);

out:
        return (ret_val);
}

/*
 * e1000_check_polarity_82577 - Checks the polarity.
 * @hw: pointer to the HW structure
 *
 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
 *
 * Polarity is determined based on the PHY specific status register.
 */
s32
e1000_check_polarity_82577(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data;

        DEBUGFUNC("e1000_check_polarity_82577");

        ret_val = phy->ops.read_reg(hw, I82577_PHY_STATUS_2, &data);

        if (!ret_val)
                phy->cable_polarity = (data & I82577_PHY_STATUS2_REV_POLARITY)
                    ? e1000_rev_polarity_reversed
                    : e1000_rev_polarity_normal;

        return (ret_val);
}

/*
 * e1000_phy_force_speed_duplex_82577 - Force speed/duplex for I82577 PHY
 * @hw: pointer to the HW structure
 *
 * Calls the PHY setup function to force speed and duplex.  Clears the
 * auto-crossover to force MDI manually.  Waits for link and returns
 * successful if link up is successful, else -E1000_ERR_PHY (-2).
 */
s32
e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data;
        bool link;

        DEBUGFUNC("e1000_phy_force_speed_duplex_82577");

        ret_val = phy->ops.read_reg(hw, PHY_CONTROL, &phy_data);
        if (ret_val)
                goto out;

        e1000_phy_force_speed_duplex_setup(hw, &phy_data);

        ret_val = phy->ops.write_reg(hw, PHY_CONTROL, phy_data);
        if (ret_val)
                goto out;

        /*
         * Clear Auto-Crossover to force MDI manually.  82577 requires MDI
         * forced whenever speed and duplex are forced.
         */
        ret_val = phy->ops.read_reg(hw, I82577_PHY_CTRL_2, &phy_data);
        if (ret_val)
                goto out;

        phy_data &= ~I82577_PHY_CTRL2_AUTO_MDIX;
        phy_data &= ~I82577_PHY_CTRL2_FORCE_MDI_MDIX;

        ret_val = phy->ops.write_reg(hw, I82577_PHY_CTRL_2, phy_data);
        if (ret_val)
                goto out;

        DEBUGOUT1("I82577_PHY_CTRL_2: %X\n", phy_data);

        usec_delay(1);

        if (phy->autoneg_wait_to_complete) {
                DEBUGOUT("Waiting for forced speed/duplex link on 82577 phy\n");

                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT, 100000, &link);
                if (ret_val)
                        goto out;

                if (!link) {
                        /* EMPTY */
                        DEBUGOUT("Link taking longer than expected.\n");
                }

                /* Try once more */
                ret_val = e1000_phy_has_link_generic(hw,
                    PHY_FORCE_LIMIT, 100000, &link);
                if (ret_val)
                        goto out;
        }

out:
        return (ret_val);
}

/*
 * e1000_get_phy_info_82577 - Retrieve I82577 PHY information
 * @hw: pointer to the HW structure
 *
 * Read PHY status to determine if link is up.  If link is up, then
 * set/determine 10base-T extended distance and polarity correction.  Read
 * PHY port status to determine MDI/MDIx and speed.  Based on the speed,
 * determine on the cable length, local and remote receiver.
 */
s32
e1000_get_phy_info_82577(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 data;
        bool link;

        DEBUGFUNC("e1000_get_phy_info_82577");

        ret_val = e1000_phy_has_link_generic(hw, 1, 0, &link);
        if (ret_val)
                goto out;

        if (!link) {
                DEBUGOUT("Phy info is only valid if link is up\n");
                ret_val = -E1000_ERR_CONFIG;
                goto out;
        }

        phy->polarity_correction = true;

        ret_val = e1000_check_polarity_82577(hw);
        if (ret_val)
                goto out;

        ret_val = phy->ops.read_reg(hw, I82577_PHY_STATUS_2, &data);
        if (ret_val)
                goto out;

        phy->is_mdix = (data & I82577_PHY_STATUS2_MDIX) ? true : false;

        if ((data & I82577_PHY_STATUS2_SPEED_MASK) ==
            I82577_PHY_STATUS2_SPEED_1000MBPS) {
                ret_val = hw->phy.ops.get_cable_length(hw);
                if (ret_val)
                        goto out;

                ret_val = phy->ops.read_reg(hw, PHY_1000T_STATUS, &data);
                if (ret_val)
                        goto out;

                phy->local_rx = (data & SR_1000T_LOCAL_RX_STATUS)
                    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;

                phy->remote_rx = (data & SR_1000T_REMOTE_RX_STATUS)
                    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
        } else {
                phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
                phy->local_rx = e1000_1000t_rx_status_undefined;
                phy->remote_rx = e1000_1000t_rx_status_undefined;
        }

out:
        return (ret_val);
}

/*
 * e1000_get_cable_length_82577 - Determine cable length for 82577 PHY
 * @hw: pointer to the HW structure
 *
 * Reads the diagnostic status register and verifies result is valid before
 * placing it in the phy_cable_length field.
 */
s32
e1000_get_cable_length_82577(struct e1000_hw *hw)
{
        struct e1000_phy_info *phy = &hw->phy;
        s32 ret_val;
        u16 phy_data, length;

        DEBUGFUNC("e1000_get_cable_length_82577");

        ret_val = phy->ops.read_reg(hw, I82577_PHY_DIAG_STATUS, &phy_data);
        if (ret_val)
                goto out;

        length = (phy_data & I82577_DSTATUS_CABLE_LENGTH) >>
            I82577_DSTATUS_CABLE_LENGTH_SHIFT;

        if (length == E1000_CABLE_LENGTH_UNDEFINED)
                ret_val = E1000_ERR_PHY;

        phy->cable_length = length;

out:
        return (ret_val);
}