mm: keep a guard page below a grow-down stack segment

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / et131x / et1310_phy.c

/*
 * Agere Systems Inc.
 * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
 *
 * Copyright * 2005 Agere Systems Inc.
 * All rights reserved.
 *   http://www.agere.com
 *
 *------------------------------------------------------------------------------
 *
 * et1310_phy.c - Routines for configuring and accessing the PHY
 *
 *------------------------------------------------------------------------------
 *
 * SOFTWARE LICENSE
 *
 * This software is provided subject to the following terms and conditions,
 * which you should read carefully before using the software.  Using this
 * software indicates your acceptance of these terms and conditions.  If you do
 * not agree with these terms and conditions, do not use the software.
 *
 * Copyright * 2005 Agere Systems Inc.
 * All rights reserved.
 *
 * Redistribution and use in source or binary forms, with or without
 * modifications, are permitted provided that the following conditions are met:
 *
 * . Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following Disclaimer as comments in the code as
 *    well as in the documentation and/or other materials provided with the
 *    distribution.
 *
 * . 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.
 *
 * . Neither the name of Agere Systems Inc. nor the names of the contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Disclaimer
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  ANY
 * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
 * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. 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, INCLUDING, BUT NOT LIMITED TO, 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 "et131x_version.h"
#include "et131x_defs.h"

#include <linux/pci.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>

#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <asm/system.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <linux/random.h>

#include "et1310_phy.h"
#include "et1310_pm.h"
#include "et1310_jagcore.h"

#include "et131x_adapter.h"
#include "et131x_netdev.h"
#include "et131x_initpci.h"

#include "et1310_address_map.h"
#include "et1310_tx.h"
#include "et1310_rx.h"
#include "et1310_mac.h"

/* Prototypes for functions with local scope */
static void et131x_xcvr_init(struct et131x_adapter *etdev);

/**
 * PhyMiRead - Read from the PHY through the MII Interface on the MAC
 * @etdev: pointer to our private adapter structure
 * @xcvrAddr: the address of the transciever
 * @xcvrReg: the register to read
 * @value: pointer to a 16-bit value in which the value will be stored
 *
 * Returns 0 on success, errno on failure (as defined in errno.h)
 */
int PhyMiRead(struct et131x_adapter *etdev, u8 xcvrAddr,
              u8 xcvrReg, u16 *value)
{
        struct _MAC_t __iomem *mac = &etdev->regs->mac;
        int status = 0;
        u32 delay;
        u32 miiAddr;
        u32 miiCmd;
        u32 miiIndicator;

        /* Save a local copy of the registers we are dealing with so we can
         * set them back
         */
        miiAddr = readl(&mac->mii_mgmt_addr);
        miiCmd = readl(&mac->mii_mgmt_cmd);

        /* Stop the current operation */
        writel(0, &mac->mii_mgmt_cmd);

        /* Set up the register we need to read from on the correct PHY */
        writel(MII_ADDR(xcvrAddr, xcvrReg), &mac->mii_mgmt_addr);

        /* Kick the read cycle off */
        delay = 0;

        writel(0x1, &mac->mii_mgmt_cmd);

        do {
                udelay(50);
                delay++;
                miiIndicator = readl(&mac->mii_mgmt_indicator);
        } while ((miiIndicator & MGMT_WAIT) && delay < 50);

        /* If we hit the max delay, we could not read the register */
        if (delay == 50) {
                dev_warn(&etdev->pdev->dev,
                            "xcvrReg 0x%08x could not be read\n", xcvrReg);
                dev_warn(&etdev->pdev->dev, "status is  0x%08x\n",
                            miiIndicator);

                status = -EIO;
        }

        /* If we hit here we were able to read the register and we need to
         * return the value to the caller */
        *value = readl(&mac->mii_mgmt_stat) & 0xFFFF;

        /* Stop the read operation */
        writel(0, &mac->mii_mgmt_cmd);

        /* set the registers we touched back to the state at which we entered
         * this function
         */
        writel(miiAddr, &mac->mii_mgmt_addr);
        writel(miiCmd, &mac->mii_mgmt_cmd);

        return status;
}

/**
 * MiWrite - Write to a PHY register through the MII interface of the MAC
 * @etdev: pointer to our private adapter structure
 * @xcvrReg: the register to read
 * @value: 16-bit value to write
 *
 * FIXME: one caller in netdev still
 *
 * Return 0 on success, errno on failure (as defined in errno.h)
 */
int MiWrite(struct et131x_adapter *etdev, u8 xcvrReg, u16 value)
{
        struct _MAC_t __iomem *mac = &etdev->regs->mac;
        int status = 0;
        u8 xcvrAddr = etdev->Stats.xcvr_addr;
        u32 delay;
        u32 miiAddr;
        u32 miiCmd;
        u32 miiIndicator;

        /* Save a local copy of the registers we are dealing with so we can
         * set them back
         */
        miiAddr = readl(&mac->mii_mgmt_addr);
        miiCmd = readl(&mac->mii_mgmt_cmd);

        /* Stop the current operation */
        writel(0, &mac->mii_mgmt_cmd);

        /* Set up the register we need to write to on the correct PHY */
        writel(MII_ADDR(xcvrAddr, xcvrReg), &mac->mii_mgmt_addr);

        /* Add the value to write to the registers to the mac */
        writel(value, &mac->mii_mgmt_ctrl);
        delay = 0;

        do {
                udelay(50);
                delay++;
                miiIndicator = readl(&mac->mii_mgmt_indicator);
        } while ((miiIndicator & MGMT_BUSY) && delay < 100);

        /* If we hit the max delay, we could not write the register */
        if (delay == 100) {
                u16 TempValue;

                dev_warn(&etdev->pdev->dev,
                    "xcvrReg 0x%08x could not be written", xcvrReg);
                dev_warn(&etdev->pdev->dev, "status is  0x%08x\n",
                            miiIndicator);
                dev_warn(&etdev->pdev->dev, "command is  0x%08x\n",
                            readl(&mac->mii_mgmt_cmd));

                MiRead(etdev, xcvrReg, &TempValue);

                status = -EIO;
        }
        /* Stop the write operation */
        writel(0, &mac->mii_mgmt_cmd);

        /* set the registers we touched back to the state at which we entered
         * this function
         */
        writel(miiAddr, &mac->mii_mgmt_addr);
        writel(miiCmd, &mac->mii_mgmt_cmd);

        return status;
}

/**
 * et131x_xcvr_find - Find the PHY ID
 * @etdev: pointer to our private adapter structure
 *
 * Returns 0 on success, errno on failure (as defined in errno.h)
 */
int et131x_xcvr_find(struct et131x_adapter *etdev)
{
        u8 xcvr_addr;
        MI_IDR1_t idr1;
        MI_IDR2_t idr2;
        u32 xcvr_id;

        /* We need to get xcvr id and address we just get the first one */
        for (xcvr_addr = 0; xcvr_addr < 32; xcvr_addr++) {
                /* Read the ID from the PHY */
                PhyMiRead(etdev, xcvr_addr,
                          (u8) offsetof(MI_REGS_t, idr1),
                          &idr1.value);
                PhyMiRead(etdev, xcvr_addr,
                          (u8) offsetof(MI_REGS_t, idr2),
                          &idr2.value);

                xcvr_id = (u32) ((idr1.value << 16) | idr2.value);

                if (idr1.value != 0 && idr1.value != 0xffff) {
                        etdev->Stats.xcvr_id = xcvr_id;
                        etdev->Stats.xcvr_addr = xcvr_addr;
                        return 0;
                }
        }
        return -ENODEV;
}

void ET1310_PhyReset(struct et131x_adapter *etdev)
{
        MiWrite(etdev, PHY_CONTROL, 0x8000);
}

/**
 *      ET1310_PhyPowerDown     -       PHY power control
 *      @etdev: device to control
 *      @down: true for off/false for back on
 *
 *      one hundred, ten, one thousand megs
 *      How would you like to have your LAN accessed
 *      Can't you see that this code processed
 *      Phy power, phy power..
 */

void ET1310_PhyPowerDown(struct et131x_adapter *etdev, bool down)
{
        u16 data;

        MiRead(etdev, PHY_CONTROL, &data);
        data &= ~0x0800;        /* Power UP */
        if (down) /* Power DOWN */
                data |= 0x0800;
        MiWrite(etdev, PHY_CONTROL, data);
}

/**
 *      ET130_PhyAutoNEg        -       autonegotiate control
 *      @etdev: device to control
 *      @enabe: autoneg on/off
 *
 *      Set up the autonegotiation state according to whether we will be
 *      negotiating the state or forcing a speed.
 */

static void ET1310_PhyAutoNeg(struct et131x_adapter *etdev, bool enable)
{
        u16 data;

        MiRead(etdev, PHY_CONTROL, &data);
        data &= ~0x1000;        /* Autonegotiation OFF */
        if (enable)
                data |= 0x1000;         /* Autonegotiation ON */
        MiWrite(etdev, PHY_CONTROL, data);
}

/**
 *      ET130_PhyDuplexMode     -       duplex control
 *      @etdev: device to control
 *      @duplex: duplex on/off
 *
 *      Set up the duplex state on the PHY
 */

static void ET1310_PhyDuplexMode(struct et131x_adapter *etdev, u16 duplex)
{
        u16 data;

        MiRead(etdev, PHY_CONTROL, &data);
        data &= ~0x100;         /* Set Half Duplex */
        if (duplex == TRUEPHY_DUPLEX_FULL)
                data |= 0x100;  /* Set Full Duplex */
        MiWrite(etdev, PHY_CONTROL, data);
}

/**
 *      ET130_PhySpeedSelect    -       speed control
 *      @etdev: device to control
 *      @duplex: duplex on/off
 *
 *      Set the speed of our PHY.
 */

static void ET1310_PhySpeedSelect(struct et131x_adapter *etdev, u16 speed)
{
        u16 data;
        static const u16 bits[3]={0x0000, 0x2000, 0x0040};

        /* Read the PHY control register */
        MiRead(etdev, PHY_CONTROL, &data);
        /* Clear all Speed settings (Bits 6, 13) */
        data &= ~0x2040;
        /* Write back the new speed */
        MiWrite(etdev, PHY_CONTROL, data | bits[speed]);
}

/**
 *      ET1310_PhyLinkStatus    -       read link state
 *      @etdev: device to read
 *      @link_status: reported link state
 *      @autoneg: reported autonegotiation state (complete/incomplete/disabled)
 *      @linkspeed: returnedlink speed in use
 *      @duplex_mode: reported half/full duplex state
 *      @mdi_mdix: not yet working
 *      @masterslave: report whether we are master or slave
 *      @polarity: link polarity
 *
 *      I can read your lan like a magazine
 *      I see if your up
 *      I know your link speed
 *      I see all the setting that you'd rather keep
 */

static void ET1310_PhyLinkStatus(struct et131x_adapter *etdev,
                          u8 *link_status,
                          u32 *autoneg,
                          u32 *linkspeed,
                          u32 *duplex_mode,
                          u32 *mdi_mdix,
                          u32 *masterslave, u32 *polarity)
{
        u16 mistatus = 0;
        u16 is1000BaseT = 0;
        u16 vmi_phystatus = 0;
        u16 control = 0;

        MiRead(etdev, PHY_STATUS, &mistatus);
        MiRead(etdev, PHY_1000_STATUS, &is1000BaseT);
        MiRead(etdev, PHY_PHY_STATUS, &vmi_phystatus);
        MiRead(etdev, PHY_CONTROL, &control);

        *link_status = (vmi_phystatus & 0x0040) ? 1 : 0;
        *autoneg = (control & 0x1000) ? ((vmi_phystatus & 0x0020) ?
                                            TRUEPHY_ANEG_COMPLETE :
                                            TRUEPHY_ANEG_NOT_COMPLETE) :
                    TRUEPHY_ANEG_DISABLED;
        *linkspeed = (vmi_phystatus & 0x0300) >> 8;
        *duplex_mode = (vmi_phystatus & 0x0080) >> 7;
        /* NOTE: Need to complete this */
        *mdi_mdix = 0;

        *masterslave = (is1000BaseT & 0x4000) ?
                        TRUEPHY_CFG_MASTER : TRUEPHY_CFG_SLAVE;
        *polarity = (vmi_phystatus & 0x0400) ?
                        TRUEPHY_POLARITY_INVERTED : TRUEPHY_POLARITY_NORMAL;
}

static void ET1310_PhyAndOrReg(struct et131x_adapter *etdev,
                        u16 regnum, u16 andMask, u16 orMask)
{
        u16 reg;

        MiRead(etdev, regnum, &reg);
        reg &= andMask;
        reg |= orMask;
        MiWrite(etdev, regnum, reg);
}

/* Still used from _mac  for BIT_READ */
void ET1310_PhyAccessMiBit(struct et131x_adapter *etdev, u16 action,
                           u16 regnum, u16 bitnum, u8 *value)
{
        u16 reg;
        u16 mask = 0x0001 << bitnum;

        /* Read the requested register */
        MiRead(etdev, regnum, &reg);

        switch (action) {
        case TRUEPHY_BIT_READ:
                *value = (reg & mask) >> bitnum;
                break;

        case TRUEPHY_BIT_SET:
                MiWrite(etdev, regnum, reg | mask);
                break;

        case TRUEPHY_BIT_CLEAR:
                MiWrite(etdev, regnum, reg & ~mask);
                break;

        default:
                break;
        }
}

void ET1310_PhyAdvertise1000BaseT(struct et131x_adapter *etdev,
                                  u16 duplex)
{
        u16 data;

        /* Read the PHY 1000 Base-T Control Register */
        MiRead(etdev, PHY_1000_CONTROL, &data);

        /* Clear Bits 8,9 */
        data &= ~0x0300;

        switch (duplex) {
        case TRUEPHY_ADV_DUPLEX_NONE:
                /* Duplex already cleared, do nothing */
                break;

        case TRUEPHY_ADV_DUPLEX_FULL:
                /* Set Bit 9 */
                data |= 0x0200;
                break;

        case TRUEPHY_ADV_DUPLEX_HALF:
                /* Set Bit 8 */
                data |= 0x0100;
                break;

        case TRUEPHY_ADV_DUPLEX_BOTH:
        default:
                data |= 0x0300;
                break;
        }

        /* Write back advertisement */
        MiWrite(etdev, PHY_1000_CONTROL, data);
}

static void ET1310_PhyAdvertise100BaseT(struct et131x_adapter *etdev,
                                 u16 duplex)
{
        u16 data;

        /* Read the Autonegotiation Register (10/100) */
        MiRead(etdev, PHY_AUTO_ADVERTISEMENT, &data);

        /* Clear bits 7,8 */
        data &= ~0x0180;

        switch (duplex) {
        case TRUEPHY_ADV_DUPLEX_NONE:
                /* Duplex already cleared, do nothing */
                break;

        case TRUEPHY_ADV_DUPLEX_FULL:
                /* Set Bit 8 */
                data |= 0x0100;
                break;

        case TRUEPHY_ADV_DUPLEX_HALF:
                /* Set Bit 7 */
                data |= 0x0080;
                break;

        case TRUEPHY_ADV_DUPLEX_BOTH:
        default:
                /* Set Bits 7,8 */
                data |= 0x0180;
                break;
        }

        /* Write back advertisement */
        MiWrite(etdev, PHY_AUTO_ADVERTISEMENT, data);
}

static void ET1310_PhyAdvertise10BaseT(struct et131x_adapter *etdev,
                                u16 duplex)
{
        u16 data;

        /* Read the Autonegotiation Register (10/100) */
        MiRead(etdev, PHY_AUTO_ADVERTISEMENT, &data);

        /* Clear bits 5,6 */
        data &= ~0x0060;

        switch (duplex) {
        case TRUEPHY_ADV_DUPLEX_NONE:
                /* Duplex already cleared, do nothing */
                break;

        case TRUEPHY_ADV_DUPLEX_FULL:
                /* Set Bit 6 */
                data |= 0x0040;
                break;

        case TRUEPHY_ADV_DUPLEX_HALF:
                /* Set Bit 5 */
                data |= 0x0020;
                break;

        case TRUEPHY_ADV_DUPLEX_BOTH:
        default:
                /* Set Bits 5,6 */
                data |= 0x0060;
                break;
        }

        /* Write back advertisement */
        MiWrite(etdev, PHY_AUTO_ADVERTISEMENT, data);
}

/**
 * et131x_setphy_normal - Set PHY for normal operation.
 * @etdev: pointer to our private adapter structure
 *
 * Used by Power Management to force the PHY into 10 Base T half-duplex mode,
 * when going to D3 in WOL mode. Also used during initialization to set the
 * PHY for normal operation.
 */
void et131x_setphy_normal(struct et131x_adapter *etdev)
{
        /* Make sure the PHY is powered up */
        ET1310_PhyPowerDown(etdev, 0);
        et131x_xcvr_init(etdev);
}


/**
 * et131x_xcvr_init - Init the phy if we are setting it into force mode
 * @etdev: pointer to our private adapter structure
 *
 */
static void et131x_xcvr_init(struct et131x_adapter *etdev)
{
        MI_IMR_t imr;
        MI_ISR_t isr;
        MI_LCR2_t lcr2;

        /* Zero out the adapter structure variable representing BMSR */
        etdev->Bmsr.value = 0;

        MiRead(etdev, (u8) offsetof(MI_REGS_t, isr), &isr.value);
        MiRead(etdev, (u8) offsetof(MI_REGS_t, imr), &imr.value);

        /* Set the link status interrupt only.  Bad behavior when link status
         * and auto neg are set, we run into a nested interrupt problem
         */
        imr.bits.int_en = 0x1;
        imr.bits.link_status = 0x1;
        imr.bits.autoneg_status = 0x1;

        MiWrite(etdev, (u8) offsetof(MI_REGS_t, imr), imr.value);

        /* Set the LED behavior such that LED 1 indicates speed (off =
         * 10Mbits, blink = 100Mbits, on = 1000Mbits) and LED 2 indicates
         * link and activity (on for link, blink off for activity).
         *
         * NOTE: Some customizations have been added here for specific
         * vendors; The LED behavior is now determined by vendor data in the
         * EEPROM. However, the above description is the default.
         */
        if ((etdev->eepromData[1] & 0x4) == 0) {
                MiRead(etdev, (u8) offsetof(MI_REGS_t, lcr2),
                       &lcr2.value);
                if ((etdev->eepromData[1] & 0x8) == 0)
                        lcr2.bits.led_tx_rx = 0x3;
                else
                        lcr2.bits.led_tx_rx = 0x4;
                lcr2.bits.led_link = 0xa;
                MiWrite(etdev, (u8) offsetof(MI_REGS_t, lcr2),
                        lcr2.value);
        }

        /* Determine if we need to go into a force mode and set it */
        if (etdev->AiForceSpeed == 0 && etdev->AiForceDpx == 0) {
                if (etdev->RegistryFlowControl == TxOnly ||
                    etdev->RegistryFlowControl == Both)
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_SET, 4, 11, NULL);
                else
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_CLEAR, 4, 11, NULL);

                if (etdev->RegistryFlowControl == Both)
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_SET, 4, 10, NULL);
                else
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_CLEAR, 4, 10, NULL);

                /* Set the phy to autonegotiation */
                ET1310_PhyAutoNeg(etdev, true);

                /* NOTE - Do we need this? */
                ET1310_PhyAccessMiBit(etdev, TRUEPHY_BIT_SET, 0, 9, NULL);
                return;
        }

        ET1310_PhyAutoNeg(etdev, false);

        /* Set to the correct force mode. */
        if (etdev->AiForceDpx != 1) {
                if (etdev->RegistryFlowControl == TxOnly ||
                    etdev->RegistryFlowControl == Both)
                        ET1310_PhyAccessMiBit(etdev,
                                      TRUEPHY_BIT_SET, 4, 11, NULL);
                else
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_CLEAR, 4, 11, NULL);

                if (etdev->RegistryFlowControl == Both)
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_SET, 4, 10, NULL);
                else
                        ET1310_PhyAccessMiBit(etdev,
                                              TRUEPHY_BIT_CLEAR, 4, 10, NULL);
        } else {
                ET1310_PhyAccessMiBit(etdev, TRUEPHY_BIT_CLEAR, 4, 10, NULL);
                ET1310_PhyAccessMiBit(etdev, TRUEPHY_BIT_CLEAR, 4, 11, NULL);
        }
        ET1310_PhyPowerDown(etdev, 1);
        switch (etdev->AiForceSpeed) {
        case 10:
                /* First we need to turn off all other advertisement */
                ET1310_PhyAdvertise1000BaseT(etdev, TRUEPHY_ADV_DUPLEX_NONE);
                ET1310_PhyAdvertise100BaseT(etdev, TRUEPHY_ADV_DUPLEX_NONE);
                if (etdev->AiForceDpx == 1) {
                        /* Set our advertise values accordingly */
                        ET1310_PhyAdvertise10BaseT(etdev,
                                                TRUEPHY_ADV_DUPLEX_HALF);
                } else if (etdev->AiForceDpx == 2) {
                        /* Set our advertise values accordingly */
                        ET1310_PhyAdvertise10BaseT(etdev,
                                                TRUEPHY_ADV_DUPLEX_FULL);
                } else {
                        /* Disable autoneg */
                        ET1310_PhyAutoNeg(etdev, false);
                        /* Disable rest of the advertisements */
                        ET1310_PhyAdvertise10BaseT(etdev,
                                        TRUEPHY_ADV_DUPLEX_NONE);
                        /* Force 10 Mbps */
                        ET1310_PhySpeedSelect(etdev, TRUEPHY_SPEED_10MBPS);
                        /* Force Full duplex */
                        ET1310_PhyDuplexMode(etdev, TRUEPHY_DUPLEX_FULL);
                }
                break;
        case 100:
                /* first we need to turn off all other advertisement */
                ET1310_PhyAdvertise1000BaseT(etdev, TRUEPHY_ADV_DUPLEX_NONE);
                ET1310_PhyAdvertise10BaseT(etdev, TRUEPHY_ADV_DUPLEX_NONE);
                if (etdev->AiForceDpx == 1) {
                        /* Set our advertise values accordingly */
                        ET1310_PhyAdvertise100BaseT(etdev,
                                                TRUEPHY_ADV_DUPLEX_HALF);
                        /* Set speed */
                        ET1310_PhySpeedSelect(etdev, TRUEPHY_SPEED_100MBPS);
                } else if (etdev->AiForceDpx == 2) {
                        /* Set our advertise values accordingly */
                        ET1310_PhyAdvertise100BaseT(etdev,
                                                TRUEPHY_ADV_DUPLEX_FULL);
                } else {
                        /* Disable autoneg */
                        ET1310_PhyAutoNeg(etdev, false);
                        /* Disable other advertisement */
                        ET1310_PhyAdvertise100BaseT(etdev,
                                                TRUEPHY_ADV_DUPLEX_NONE);
                        /* Force 100 Mbps */
                        ET1310_PhySpeedSelect(etdev, TRUEPHY_SPEED_100MBPS);
                        /* Force Full duplex */
                        ET1310_PhyDuplexMode(etdev, TRUEPHY_DUPLEX_FULL);
                }
                break;
        case 1000:
                /* first we need to turn off all other advertisement */
                ET1310_PhyAdvertise100BaseT(etdev, TRUEPHY_ADV_DUPLEX_NONE);
                ET1310_PhyAdvertise10BaseT(etdev, TRUEPHY_ADV_DUPLEX_NONE);
                /* set our advertise values accordingly */
                ET1310_PhyAdvertise1000BaseT(etdev, TRUEPHY_ADV_DUPLEX_FULL);
                break;
        }
        ET1310_PhyPowerDown(etdev, 0);
}

void et131x_Mii_check(struct et131x_adapter *etdev,
                      MI_BMSR_t bmsr, MI_BMSR_t bmsr_ints)
{
        u8 link_status;
        u32 autoneg_status;
        u32 speed;
        u32 duplex;
        u32 mdi_mdix;
        u32 masterslave;
        u32 polarity;
        unsigned long flags;

        if (bmsr_ints.bits.link_status) {
                if (bmsr.bits.link_status) {
                        etdev->PoMgmt.TransPhyComaModeOnBoot = 20;

                        /* Update our state variables and indicate the
                         * connected state
                         */
                        spin_lock_irqsave(&etdev->Lock, flags);

                        etdev->MediaState = NETIF_STATUS_MEDIA_CONNECT;
                        etdev->Flags &= ~fMP_ADAPTER_LINK_DETECTION;

                        spin_unlock_irqrestore(&etdev->Lock, flags);

                        netif_carrier_on(etdev->netdev);
                } else {
                        dev_warn(&etdev->pdev->dev,
                            "Link down - cable problem ?\n");

                        if (etdev->linkspeed == TRUEPHY_SPEED_10MBPS) {
                                /* NOTE - Is there a way to query this without
                                 * TruePHY?
                                 * && TRU_QueryCoreType(etdev->hTruePhy, 0) == EMI_TRUEPHY_A13O) {
                                 */
                                u16 Register18;

                                MiRead(etdev, 0x12, &Register18);
                                MiWrite(etdev, 0x12, Register18 | 0x4);
                                MiWrite(etdev, 0x10, Register18 | 0x8402);
                                MiWrite(etdev, 0x11, Register18 | 511);
                                MiWrite(etdev, 0x12, Register18);
                        }

                        /* For the first N seconds of life, we are in "link
                         * detection" When we are in this state, we should
                         * only report "connected". When the LinkDetection
                         * Timer expires, we can report disconnected (handled
                         * in the LinkDetectionDPC).
                         */
                        if (!(etdev->Flags & fMP_ADAPTER_LINK_DETECTION) ||
                          (etdev->MediaState == NETIF_STATUS_MEDIA_DISCONNECT)) {
                                spin_lock_irqsave(&etdev->Lock, flags);
                                etdev->MediaState =
                                    NETIF_STATUS_MEDIA_DISCONNECT;
                                spin_unlock_irqrestore(&etdev->Lock,
                                                       flags);

                                netif_carrier_off(etdev->netdev);
                        }

                        etdev->linkspeed = 0;
                        etdev->duplex_mode = 0;

                        /* Free the packets being actively sent & stopped */
                        et131x_free_busy_send_packets(etdev);

                        /* Re-initialize the send structures */
                        et131x_init_send(etdev);

                        /* Reset the RFD list and re-start RU */
                        et131x_reset_recv(etdev);

                        /*
                         * Bring the device back to the state it was during
                         * init prior to autonegotiation being complete. This
                         * way, when we get the auto-neg complete interrupt,
                         * we can complete init by calling ConfigMacREGS2.
                         */
                        et131x_soft_reset(etdev);

                        /* Setup ET1310 as per the documentation */
                        et131x_adapter_setup(etdev);

                        /* Setup the PHY into coma mode until the cable is
                         * plugged back in
                         */
                        if (etdev->RegistryPhyComa == 1)
                                EnablePhyComa(etdev);
                }
        }

        if (bmsr_ints.bits.auto_neg_complete ||
            (etdev->AiForceDpx == 3 && bmsr_ints.bits.link_status)) {
                if (bmsr.bits.auto_neg_complete || etdev->AiForceDpx == 3) {
                        ET1310_PhyLinkStatus(etdev,
                                             &link_status, &autoneg_status,
                                             &speed, &duplex, &mdi_mdix,
                                             &masterslave, &polarity);

                        etdev->linkspeed = speed;
                        etdev->duplex_mode = duplex;

                        etdev->PoMgmt.TransPhyComaModeOnBoot = 20;

                        if (etdev->linkspeed == TRUEPHY_SPEED_10MBPS) {
                                /*
                                 * NOTE - Is there a way to query this without
                                 * TruePHY?
                                 * && TRU_QueryCoreType(etdev->hTruePhy, 0)== EMI_TRUEPHY_A13O) {
                                 */
                                u16 Register18;

                                MiRead(etdev, 0x12, &Register18);
                                MiWrite(etdev, 0x12, Register18 | 0x4);
                                MiWrite(etdev, 0x10, Register18 | 0x8402);
                                MiWrite(etdev, 0x11, Register18 | 511);
                                MiWrite(etdev, 0x12, Register18);
                        }

                        ConfigFlowControl(etdev);

                        if (etdev->linkspeed == TRUEPHY_SPEED_1000MBPS &&
                                        etdev->RegistryJumboPacket > 2048)
                                ET1310_PhyAndOrReg(etdev, 0x16, 0xcfff,
                                                                   0x2000);

                        SetRxDmaTimer(etdev);
                        ConfigMACRegs2(etdev);
                }
        }
}

/*
 * The routines which follow provide low-level access to the PHY, and are used
 * primarily by the routines above (although there are a few places elsewhere
 * in the driver where this level of access is required).
 */

static const u16 ConfigPhy[25][2] = {
        /* Reg      Value      Register */
        /* Addr                         */
        {0x880B, 0x0926},       /* AfeIfCreg4B1000Msbs */
        {0x880C, 0x0926},       /* AfeIfCreg4B100Msbs */
        {0x880D, 0x0926},       /* AfeIfCreg4B10Msbs */

        {0x880E, 0xB4D3},       /* AfeIfCreg4B1000Lsbs */
        {0x880F, 0xB4D3},       /* AfeIfCreg4B100Lsbs */
        {0x8810, 0xB4D3},       /* AfeIfCreg4B10Lsbs */

        {0x8805, 0xB03E},       /* AfeIfCreg3B1000Msbs */
        {0x8806, 0xB03E},       /* AfeIfCreg3B100Msbs */
        {0x8807, 0xFF00},       /* AfeIfCreg3B10Msbs */

        {0x8808, 0xE090},       /* AfeIfCreg3B1000Lsbs */
        {0x8809, 0xE110},       /* AfeIfCreg3B100Lsbs */
        {0x880A, 0x0000},       /* AfeIfCreg3B10Lsbs */

        {0x300D, 1},            /* DisableNorm */

        {0x280C, 0x0180},       /* LinkHoldEnd */

        {0x1C21, 0x0002},       /* AlphaM */

        {0x3821, 6},            /* FfeLkgTx0 */
        {0x381D, 1},            /* FfeLkg1g4 */
        {0x381E, 1},            /* FfeLkg1g5 */
        {0x381F, 1},            /* FfeLkg1g6 */
        {0x3820, 1},            /* FfeLkg1g7 */

        {0x8402, 0x01F0},       /* Btinact */
        {0x800E, 20},           /* LftrainTime */
        {0x800F, 24},           /* DvguardTime */
        {0x8010, 46},           /* IdlguardTime */

        {0, 0}

};

/* condensed version of the phy initialization routine */
void ET1310_PhyInit(struct et131x_adapter *etdev)
{
        u16 data, index;

        if (etdev == NULL)
                return;

        /* get the identity (again ?) */
        MiRead(etdev, PHY_ID_1, &data);
        MiRead(etdev, PHY_ID_2, &data);

        /* what does this do/achieve ? */
        MiRead(etdev, PHY_MPHY_CONTROL_REG, &data); /* should read 0002 */
        MiWrite(etdev, PHY_MPHY_CONTROL_REG,    0x0006);

        /* read modem register 0402, should I do something with the return
           data ? */
        MiWrite(etdev, PHY_INDEX_REG, 0x0402);
        MiRead(etdev, PHY_DATA_REG, &data);

        /* what does this do/achieve ? */
        MiWrite(etdev, PHY_MPHY_CONTROL_REG, 0x0002);

        /* get the identity (again ?) */
        MiRead(etdev, PHY_ID_1, &data);
        MiRead(etdev, PHY_ID_2, &data);

        /* what does this achieve ? */
        MiRead(etdev, PHY_MPHY_CONTROL_REG, &data); /* should read 0002 */
        MiWrite(etdev, PHY_MPHY_CONTROL_REG, 0x0006);

        /* read modem register 0402, should I do something with
           the return data? */
        MiWrite(etdev, PHY_INDEX_REG, 0x0402);
        MiRead(etdev, PHY_DATA_REG, &data);

        MiWrite(etdev, PHY_MPHY_CONTROL_REG, 0x0002);

        /* what does this achieve (should return 0x1040) */
        MiRead(etdev, PHY_CONTROL, &data);
        MiRead(etdev, PHY_MPHY_CONTROL_REG, &data); /* should read 0002 */
        MiWrite(etdev, PHY_CONTROL, 0x1840);

        MiWrite(etdev, PHY_MPHY_CONTROL_REG, 0x0007);

        /* here the writing of the array starts.... */
        index = 0;
        while (ConfigPhy[index][0] != 0x0000) {
                /* write value */
                MiWrite(etdev, PHY_INDEX_REG, ConfigPhy[index][0]);
                MiWrite(etdev, PHY_DATA_REG, ConfigPhy[index][1]);

                /* read it back */
                MiWrite(etdev, PHY_INDEX_REG, ConfigPhy[index][0]);
                MiRead(etdev, PHY_DATA_REG, &data);

                /* do a check on the value read back ? */
                index++;
        }
        /* here the writing of the array ends... */

        MiRead(etdev, PHY_CONTROL, &data);              /* 0x1840 */
        MiRead(etdev, PHY_MPHY_CONTROL_REG, &data);/* should read 0007 */
        MiWrite(etdev, PHY_CONTROL, 0x1040);
        MiWrite(etdev, PHY_MPHY_CONTROL_REG, 0x0002);
}