Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"

[pv_ops_mirror.git] / drivers / net / atl1 / atl1_hw.c

/*
 * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
 * Copyright(c) 2006 Chris Snook <csnook@redhat.com>
 * Copyright(c) 2006 Jay Cliburn <jcliburn@gmail.com>
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/if_vlan.h>
#include <linux/etherdevice.h>
#include <linux/crc32.h>
#include <asm/byteorder.h>

#include "atl1.h"

/*
 * Reset the transmit and receive units; mask and clear all interrupts.
 * hw - Struct containing variables accessed by shared code
 * return : ATL1_SUCCESS  or  idle status (if error)
 */
s32 atl1_reset_hw(struct atl1_hw *hw)
{
        struct pci_dev *pdev = hw->back->pdev;
        u32 icr;
        int i;

        /*
         * Clear Interrupt mask to stop board from generating
         * interrupts & Clear any pending interrupt events
         */
        /*
         * iowrite32(0, hw->hw_addr + REG_IMR);
         * iowrite32(0xffffffff, hw->hw_addr + REG_ISR);
         */

        /*
         * Issue Soft Reset to the MAC.  This will reset the chip's
         * transmit, receive, DMA.  It will not effect
         * the current PCI configuration.  The global reset bit is self-
         * clearing, and should clear within a microsecond.
         */
        iowrite32(MASTER_CTRL_SOFT_RST, hw->hw_addr + REG_MASTER_CTRL);
        ioread32(hw->hw_addr + REG_MASTER_CTRL);

        iowrite16(1, hw->hw_addr + REG_GPHY_ENABLE);
        ioread16(hw->hw_addr + REG_GPHY_ENABLE);

        msleep(1);              /* delay about 1ms */

        /* Wait at least 10ms for All module to be Idle */
        for (i = 0; i < 10; i++) {
                icr = ioread32(hw->hw_addr + REG_IDLE_STATUS);
                if (!icr)
                        break;
                msleep(1);      /* delay 1 ms */
                cpu_relax();    /* FIXME: is this still the right way to do this? */
        }

        if (icr) {
                dev_dbg(&pdev->dev, "ICR = 0x%x\n", icr);
                return icr;
        }

        return ATL1_SUCCESS;
}

/* function about EEPROM
 *
 * check_eeprom_exist
 * return 0 if eeprom exist
 */
static int atl1_check_eeprom_exist(struct atl1_hw *hw)
{
        u32 value;
        value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
        if (value & SPI_FLASH_CTRL_EN_VPD) {
                value &= ~SPI_FLASH_CTRL_EN_VPD;
                iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
        }

        value = ioread16(hw->hw_addr + REG_PCIE_CAP_LIST);
        return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
}

static bool atl1_read_eeprom(struct atl1_hw *hw, u32 offset, u32 *p_value)
{
        int i;
        u32 control;

        if (offset & 3)
                return false;   /* address do not align */

        iowrite32(0, hw->hw_addr + REG_VPD_DATA);
        control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
        iowrite32(control, hw->hw_addr + REG_VPD_CAP);
        ioread32(hw->hw_addr + REG_VPD_CAP);

        for (i = 0; i < 10; i++) {
                msleep(2);
                control = ioread32(hw->hw_addr + REG_VPD_CAP);
                if (control & VPD_CAP_VPD_FLAG)
                        break;
        }
        if (control & VPD_CAP_VPD_FLAG) {
                *p_value = ioread32(hw->hw_addr + REG_VPD_DATA);
                return true;
        }
        return false;           /* timeout */
}

/*
 * Reads the value from a PHY register
 * hw - Struct containing variables accessed by shared code
 * reg_addr - address of the PHY register to read
 */
s32 atl1_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data)
{
        u32 val;
        int i;

        val = ((u32) (reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
                MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW | MDIO_CLK_25_4 <<
                MDIO_CLK_SEL_SHIFT;
        iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
        ioread32(hw->hw_addr + REG_MDIO_CTRL);

        for (i = 0; i < MDIO_WAIT_TIMES; i++) {
                udelay(2);
                val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
                if (!(val & (MDIO_START | MDIO_BUSY)))
                        break;
        }
        if (!(val & (MDIO_START | MDIO_BUSY))) {
                *phy_data = (u16) val;
                return ATL1_SUCCESS;
        }
        return ATL1_ERR_PHY;
}

#define CUSTOM_SPI_CS_SETUP     2
#define CUSTOM_SPI_CLK_HI       2
#define CUSTOM_SPI_CLK_LO       2
#define CUSTOM_SPI_CS_HOLD      2
#define CUSTOM_SPI_CS_HI        3

static bool atl1_spi_read(struct atl1_hw *hw, u32 addr, u32 *buf)
{
        int i;
        u32 value;

        iowrite32(0, hw->hw_addr + REG_SPI_DATA);
        iowrite32(addr, hw->hw_addr + REG_SPI_ADDR);

        value = SPI_FLASH_CTRL_WAIT_READY |
            (CUSTOM_SPI_CS_SETUP & SPI_FLASH_CTRL_CS_SETUP_MASK) <<
            SPI_FLASH_CTRL_CS_SETUP_SHIFT | (CUSTOM_SPI_CLK_HI &
                                             SPI_FLASH_CTRL_CLK_HI_MASK) <<
            SPI_FLASH_CTRL_CLK_HI_SHIFT | (CUSTOM_SPI_CLK_LO &
                                           SPI_FLASH_CTRL_CLK_LO_MASK) <<
            SPI_FLASH_CTRL_CLK_LO_SHIFT | (CUSTOM_SPI_CS_HOLD &
                                           SPI_FLASH_CTRL_CS_HOLD_MASK) <<
            SPI_FLASH_CTRL_CS_HOLD_SHIFT | (CUSTOM_SPI_CS_HI &
                                            SPI_FLASH_CTRL_CS_HI_MASK) <<
            SPI_FLASH_CTRL_CS_HI_SHIFT | (1 & SPI_FLASH_CTRL_INS_MASK) <<
            SPI_FLASH_CTRL_INS_SHIFT;

        iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);

        value |= SPI_FLASH_CTRL_START;
        iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
        ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);

        for (i = 0; i < 10; i++) {
                msleep(1);      /* 1ms */
                value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
                if (!(value & SPI_FLASH_CTRL_START))
                        break;
        }

        if (value & SPI_FLASH_CTRL_START)
                return false;

        *buf = ioread32(hw->hw_addr + REG_SPI_DATA);

        return true;
}

/*
 * get_permanent_address
 * return 0 if get valid mac address,
 */
static int atl1_get_permanent_address(struct atl1_hw *hw)
{
        u32 addr[2];
        u32 i, control;
        u16 reg;
        u8 eth_addr[ETH_ALEN];
        bool key_valid;

        if (is_valid_ether_addr(hw->perm_mac_addr))
                return 0;

        /* init */
        addr[0] = addr[1] = 0;

        if (!atl1_check_eeprom_exist(hw)) {     /* eeprom exist */
                reg = 0;
                key_valid = false;
                /* Read out all EEPROM content */
                i = 0;
                while (1) {
                        if (atl1_read_eeprom(hw, i + 0x100, &control)) {
                                if (key_valid) {
                                        if (reg == REG_MAC_STA_ADDR)
                                                addr[0] = control;
                                        else if (reg == (REG_MAC_STA_ADDR + 4))
                                                addr[1] = control;
                                        key_valid = false;
                                } else if ((control & 0xff) == 0x5A) {
                                        key_valid = true;
                                        reg = (u16) (control >> 16);
                                } else
                                        break;  /* assume data end while encount an invalid KEYWORD */
                        } else
                                break;  /* read error */
                        i += 4;
                }

                *(u32 *) &eth_addr[2] = swab32(addr[0]);
                *(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
                if (is_valid_ether_addr(eth_addr)) {
                        memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
                        return 0;
                }
                return 1;
        }

        /* see if SPI FLAGS exist ? */
        addr[0] = addr[1] = 0;
        reg = 0;
        key_valid = false;
        i = 0;
        while (1) {
                if (atl1_spi_read(hw, i + 0x1f000, &control)) {
                        if (key_valid) {
                                if (reg == REG_MAC_STA_ADDR)
                                        addr[0] = control;
                                else if (reg == (REG_MAC_STA_ADDR + 4))
                                        addr[1] = control;
                                key_valid = false;
                        } else if ((control & 0xff) == 0x5A) {
                                key_valid = true;
                                reg = (u16) (control >> 16);
                        } else
                                break;  /* data end */
                } else
                        break;  /* read error */
                i += 4;
        }

        *(u32 *) &eth_addr[2] = swab32(addr[0]);
        *(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
        if (is_valid_ether_addr(eth_addr)) {
                memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
                return 0;
        }

        /*
         * On some motherboards, the MAC address is written by the
         * BIOS directly to the MAC register during POST, and is
         * not stored in eeprom.  If all else thus far has failed
         * to fetch the permanent MAC address, try reading it directly.
         */
        addr[0] = ioread32(hw->hw_addr + REG_MAC_STA_ADDR);
        addr[1] = ioread16(hw->hw_addr + (REG_MAC_STA_ADDR + 4));
        *(u32 *) &eth_addr[2] = swab32(addr[0]);
        *(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
        if (is_valid_ether_addr(eth_addr)) {
                memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
                return 0;
        }

        return 1;
}

/*
 * Reads the adapter's MAC address from the EEPROM
 * hw - Struct containing variables accessed by shared code
 */
s32 atl1_read_mac_addr(struct atl1_hw *hw)
{
        u16 i;

        if (atl1_get_permanent_address(hw))
                random_ether_addr(hw->perm_mac_addr);

        for (i = 0; i < ETH_ALEN; i++)
                hw->mac_addr[i] = hw->perm_mac_addr[i];
        return ATL1_SUCCESS;
}

/*
 * Hashes an address to determine its location in the multicast table
 * hw - Struct containing variables accessed by shared code
 * mc_addr - the multicast address to hash
 *
 * atl1_hash_mc_addr
 *  purpose
 *      set hash value for a multicast address
 *      hash calcu processing :
 *          1. calcu 32bit CRC for multicast address
 *          2. reverse crc with MSB to LSB
 */
u32 atl1_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr)
{
        u32 crc32, value = 0;
        int i;

        crc32 = ether_crc_le(6, mc_addr);
        for (i = 0; i < 32; i++)
                value |= (((crc32 >> i) & 1) << (31 - i));

        return value;
}

/*
 * Sets the bit in the multicast table corresponding to the hash value.
 * hw - Struct containing variables accessed by shared code
 * hash_value - Multicast address hash value
 */
void atl1_hash_set(struct atl1_hw *hw, u32 hash_value)
{
        u32 hash_bit, hash_reg;
        u32 mta;

        /*
         * The HASH Table  is a register array of 2 32-bit registers.
         * It is treated like an array of 64 bits.  We want to set
         * bit BitArray[hash_value]. So we figure out what register
         * the bit is in, read it, OR in the new bit, then write
         * back the new value.  The register is determined by the
         * upper 7 bits of the hash value and the bit within that
         * register are determined by the lower 5 bits of the value.
         */
        hash_reg = (hash_value >> 31) & 0x1;
        hash_bit = (hash_value >> 26) & 0x1F;
        mta = ioread32((hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
        mta |= (1 << hash_bit);
        iowrite32(mta, (hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
}

/*
 * Writes a value to a PHY register
 * hw - Struct containing variables accessed by shared code
 * reg_addr - address of the PHY register to write
 * data - data to write to the PHY
 */
s32 atl1_write_phy_reg(struct atl1_hw *hw, u32 reg_addr, u16 phy_data)
{
        int i;
        u32 val;

        val = ((u32) (phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
            (reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
            MDIO_SUP_PREAMBLE |
            MDIO_START | MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
        iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
        ioread32(hw->hw_addr + REG_MDIO_CTRL);

        for (i = 0; i < MDIO_WAIT_TIMES; i++) {
                udelay(2);
                val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
                if (!(val & (MDIO_START | MDIO_BUSY)))
                        break;
        }

        if (!(val & (MDIO_START | MDIO_BUSY)))
                return ATL1_SUCCESS;

        return ATL1_ERR_PHY;
}

/*
 * Make L001's PHY out of Power Saving State (bug)
 * hw - Struct containing variables accessed by shared code
 * when power on, L001's PHY always on Power saving State
 * (Gigabit Link forbidden)
 */
static s32 atl1_phy_leave_power_saving(struct atl1_hw *hw)
{
        s32 ret;
        ret = atl1_write_phy_reg(hw, 29, 0x0029);
        if (ret)
                return ret;
        return atl1_write_phy_reg(hw, 30, 0);
}

/*
 *TODO: do something or get rid of this
 */
s32 atl1_phy_enter_power_saving(struct atl1_hw *hw)
{
/*    s32 ret_val;
 *    u16 phy_data;
 */

/*
    ret_val = atl1_write_phy_reg(hw, ...);
    ret_val = atl1_write_phy_reg(hw, ...);
    ....
*/
        return ATL1_SUCCESS;
}

/*
 * Resets the PHY and make all config validate
 * hw - Struct containing variables accessed by shared code
 *
 * Sets bit 15 and 12 of the MII Control regiser (for F001 bug)
 */
static s32 atl1_phy_reset(struct atl1_hw *hw)
{
        struct pci_dev *pdev = hw->back->pdev;
        s32 ret_val;
        u16 phy_data;

        if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
            hw->media_type == MEDIA_TYPE_1000M_FULL)
                phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
        else {
                switch (hw->media_type) {
                case MEDIA_TYPE_100M_FULL:
                        phy_data =
                            MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
                            MII_CR_RESET;
                        break;
                case MEDIA_TYPE_100M_HALF:
                        phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
                        break;
                case MEDIA_TYPE_10M_FULL:
                        phy_data =
                            MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
                        break;
                default:        /* MEDIA_TYPE_10M_HALF: */
                        phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
                        break;
                }
        }

        ret_val = atl1_write_phy_reg(hw, MII_BMCR, phy_data);
        if (ret_val) {
                u32 val;
                int i;
                /* pcie serdes link may be down! */
                dev_dbg(&pdev->dev, "pcie phy link down\n");

                for (i = 0; i < 25; i++) {
                        msleep(1);
                        val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
                        if (!(val & (MDIO_START | MDIO_BUSY)))
                                break;
                }

                if ((val & (MDIO_START | MDIO_BUSY)) != 0) {
                        dev_warn(&pdev->dev, "pcie link down at least 25ms\n");
                        return ret_val;
                }
        }
        return ATL1_SUCCESS;
}

/*
 * Configures PHY autoneg and flow control advertisement settings
 * hw - Struct containing variables accessed by shared code
 */
s32 atl1_phy_setup_autoneg_adv(struct atl1_hw *hw)
{
        s32 ret_val;
        s16 mii_autoneg_adv_reg;
        s16 mii_1000t_ctrl_reg;

        /* Read the MII Auto-Neg Advertisement Register (Address 4). */
        mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;

        /* Read the MII 1000Base-T Control Register (Address 9). */
        mii_1000t_ctrl_reg = MII_AT001_CR_1000T_DEFAULT_CAP_MASK;

        /*
         * 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 &= ~MII_AR_SPEED_MASK;
        mii_1000t_ctrl_reg &= ~MII_AT001_CR_1000T_SPEED_MASK;

        /*
         * Need to parse media_type  and set up
         * the appropriate PHY registers.
         */
        switch (hw->media_type) {
        case MEDIA_TYPE_AUTO_SENSOR:
                mii_autoneg_adv_reg |= (MII_AR_10T_HD_CAPS |
                                        MII_AR_10T_FD_CAPS |
                                        MII_AR_100TX_HD_CAPS |
                                        MII_AR_100TX_FD_CAPS);
                mii_1000t_ctrl_reg |= MII_AT001_CR_1000T_FD_CAPS;
                break;

        case MEDIA_TYPE_1000M_FULL:
                mii_1000t_ctrl_reg |= MII_AT001_CR_1000T_FD_CAPS;
                break;

        case MEDIA_TYPE_100M_FULL:
                mii_autoneg_adv_reg |= MII_AR_100TX_FD_CAPS;
                break;

        case MEDIA_TYPE_100M_HALF:
                mii_autoneg_adv_reg |= MII_AR_100TX_HD_CAPS;
                break;

        case MEDIA_TYPE_10M_FULL:
                mii_autoneg_adv_reg |= MII_AR_10T_FD_CAPS;
                break;

        default:
                mii_autoneg_adv_reg |= MII_AR_10T_HD_CAPS;
                break;
        }

        /* flow control fixed to enable all */
        mii_autoneg_adv_reg |= (MII_AR_ASM_DIR | MII_AR_PAUSE);

        hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
        hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;

        ret_val = atl1_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
        if (ret_val)
                return ret_val;

        ret_val = atl1_write_phy_reg(hw, MII_AT001_CR, mii_1000t_ctrl_reg);
        if (ret_val)
                return ret_val;

        return ATL1_SUCCESS;
}

/*
 * Configures link settings.
 * hw - Struct containing variables accessed by shared code
 * Assumes the hardware has previously been reset and the
 * transmitter and receiver are not enabled.
 */
static s32 atl1_setup_link(struct atl1_hw *hw)
{
        struct pci_dev *pdev = hw->back->pdev;
        s32 ret_val;

        /*
         * Options:
         *  PHY will advertise value(s) parsed from
         *  autoneg_advertised and fc
         *  no matter what autoneg is , We will not wait link result.
         */
        ret_val = atl1_phy_setup_autoneg_adv(hw);
        if (ret_val) {
                dev_dbg(&pdev->dev, "error setting up autonegotiation\n");
                return ret_val;
        }
        /* SW.Reset , En-Auto-Neg if needed */
        ret_val = atl1_phy_reset(hw);
        if (ret_val) {
                dev_dbg(&pdev->dev, "error resetting phy\n");
                return ret_val;
        }
        hw->phy_configured = true;
        return ret_val;
}

static struct atl1_spi_flash_dev flash_table[] = {
/*      MFR_NAME  WRSR  READ  PRGM  WREN  WRDI  RDSR  RDID  SECTOR_ERASE CHIP_ERASE */
        {"Atmel", 0x00, 0x03, 0x02, 0x06, 0x04, 0x05, 0x15, 0x52,        0x62},
        {"SST",   0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0x90, 0x20,        0x60},
        {"ST",    0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0xAB, 0xD8,        0xC7},
};

static void atl1_init_flash_opcode(struct atl1_hw *hw)
{
        if (hw->flash_vendor >= sizeof(flash_table) / sizeof(flash_table[0]))
                hw->flash_vendor = 0;   /* ATMEL */

        /* Init OP table */
        iowrite8(flash_table[hw->flash_vendor].cmd_program,
                hw->hw_addr + REG_SPI_FLASH_OP_PROGRAM);
        iowrite8(flash_table[hw->flash_vendor].cmd_sector_erase,
                hw->hw_addr + REG_SPI_FLASH_OP_SC_ERASE);
        iowrite8(flash_table[hw->flash_vendor].cmd_chip_erase,
                hw->hw_addr + REG_SPI_FLASH_OP_CHIP_ERASE);
        iowrite8(flash_table[hw->flash_vendor].cmd_rdid,
                hw->hw_addr + REG_SPI_FLASH_OP_RDID);
        iowrite8(flash_table[hw->flash_vendor].cmd_wren,
                hw->hw_addr + REG_SPI_FLASH_OP_WREN);
        iowrite8(flash_table[hw->flash_vendor].cmd_rdsr,
                hw->hw_addr + REG_SPI_FLASH_OP_RDSR);
        iowrite8(flash_table[hw->flash_vendor].cmd_wrsr,
                hw->hw_addr + REG_SPI_FLASH_OP_WRSR);
        iowrite8(flash_table[hw->flash_vendor].cmd_read,
                hw->hw_addr + REG_SPI_FLASH_OP_READ);
}

/*
 * Performs basic configuration of the adapter.
 * hw - Struct containing variables accessed by shared code
 * Assumes that the controller has previously been reset and is in a
 * post-reset uninitialized state. Initializes multicast table,
 * and  Calls routines to setup link
 * Leaves the transmit and receive units disabled and uninitialized.
 */
s32 atl1_init_hw(struct atl1_hw *hw)
{
        u32 ret_val = 0;

        /* Zero out the Multicast HASH table */
        iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
        /* clear the old settings from the multicast hash table */
        iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));

        atl1_init_flash_opcode(hw);

        if (!hw->phy_configured) {
                /* enable GPHY LinkChange Interrrupt */
                ret_val = atl1_write_phy_reg(hw, 18, 0xC00);
                if (ret_val)
                        return ret_val;
                /* make PHY out of power-saving state */
                ret_val = atl1_phy_leave_power_saving(hw);
                if (ret_val)
                        return ret_val;
                /* Call a subroutine to configure the link */
                ret_val = atl1_setup_link(hw);
        }
        return ret_val;
}

/*
 * Detects the current speed and duplex settings of the hardware.
 * hw - Struct containing variables accessed by shared code
 * speed - Speed of the connection
 * duplex - Duplex setting of the connection
 */
s32 atl1_get_speed_and_duplex(struct atl1_hw *hw, u16 *speed, u16 *duplex)
{
        struct pci_dev *pdev = hw->back->pdev;
        s32 ret_val;
        u16 phy_data;

        /* ; --- Read   PHY Specific Status Register (17) */
        ret_val = atl1_read_phy_reg(hw, MII_AT001_PSSR, &phy_data);
        if (ret_val)
                return ret_val;

        if (!(phy_data & MII_AT001_PSSR_SPD_DPLX_RESOLVED))
                return ATL1_ERR_PHY_RES;

        switch (phy_data & MII_AT001_PSSR_SPEED) {
        case MII_AT001_PSSR_1000MBS:
                *speed = SPEED_1000;
                break;
        case MII_AT001_PSSR_100MBS:
                *speed = SPEED_100;
                break;
        case MII_AT001_PSSR_10MBS:
                *speed = SPEED_10;
                break;
        default:
                dev_dbg(&pdev->dev, "error getting speed\n");
                return ATL1_ERR_PHY_SPEED;
                break;
        }
        if (phy_data & MII_AT001_PSSR_DPLX)
                *duplex = FULL_DUPLEX;
        else
                *duplex = HALF_DUPLEX;

        return ATL1_SUCCESS;
}

void atl1_set_mac_addr(struct atl1_hw *hw)
{
        u32 value;
        /*
         * 00-0B-6A-F6-00-DC
         * 0:  6AF600DC   1: 000B
         * low dword
         */
        value = (((u32) hw->mac_addr[2]) << 24) |
            (((u32) hw->mac_addr[3]) << 16) |
            (((u32) hw->mac_addr[4]) << 8) | (((u32) hw->mac_addr[5]));
        iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
        /* high dword */
        value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
        iowrite32(value, (hw->hw_addr + REG_MAC_STA_ADDR) + (1 << 2));
}