e1000_hw.c

intel E1000类型网卡驱动源代码,目前在2.4的内核下支持82573的芯片不是很好,其他都不错

/*******************************************************************************

  
  Copyright(c) 1999 - 2004 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.
  
  The full GNU General Public License is included in this distribution in the
  file called LICENSE.
  
  Contact Information:
  Linux NICS <[e-mail]>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

/* e1000_hw.c
 * Shared functions for accessing and configuring the MAC
 */

#include "e1000_hw.h"

static int32_t e1000_set_phy_type(struct e1000_hw *hw);
static void e1000_phy_init_script(struct e1000_hw *hw);
static int32_t e1000_setup_copper_link(struct e1000_hw *hw);
static int32_t e1000_setup_fiber_serdes_link(struct e1000_hw *hw);
static int32_t e1000_adjust_serdes_amplitude(struct e1000_hw *hw);
static int32_t e1000_phy_force_speed_duplex(struct e1000_hw *hw);
static int32_t e1000_config_mac_to_phy(struct e1000_hw *hw);
static void e1000_raise_mdi_clk(struct e1000_hw *hw, uint32_t *ctrl);
static void e1000_lower_mdi_clk(struct e1000_hw *hw, uint32_t *ctrl);
static void e1000_shift_out_mdi_bits(struct e1000_hw *hw, uint32_t data,
                                     uint16_t count);
static uint16_t e1000_shift_in_mdi_bits(struct e1000_hw *hw);
static int32_t e1000_phy_reset_dsp(struct e1000_hw *hw);
static int32_t e1000_write_eeprom_spi(struct e1000_hw *hw, uint16_t offset,
                                      uint16_t words, uint16_t *data);
static int32_t e1000_write_eeprom_microwire(struct e1000_hw *hw,
                                            uint16_t offset, uint16_t words,
                                            uint16_t *data);
static int32_t e1000_spi_eeprom_ready(struct e1000_hw *hw);
static void e1000_raise_ee_clk(struct e1000_hw *hw, uint32_t *eecd);
static void e1000_lower_ee_clk(struct e1000_hw *hw, uint32_t *eecd);
static void e1000_shift_out_ee_bits(struct e1000_hw *hw, uint16_t data,
                                    uint16_t count);
static int32_t e1000_write_phy_reg_ex(struct e1000_hw *hw, uint32_t reg_addr,
                                      uint16_t phy_data);
static int32_t e1000_read_phy_reg_ex(struct e1000_hw *hw,uint32_t reg_addr,
                                     uint16_t *phy_data);
static uint16_t e1000_shift_in_ee_bits(struct e1000_hw *hw, uint16_t count);
static int32_t e1000_acquire_eeprom(struct e1000_hw *hw);
static void e1000_release_eeprom(struct e1000_hw *hw);
static void e1000_standby_eeprom(struct e1000_hw *hw);
static int32_t e1000_id_led_init(struct e1000_hw * hw);
static int32_t e1000_set_vco_speed(struct e1000_hw *hw);
static int32_t e1000_polarity_reversal_workaround(struct e1000_hw *hw);
static int32_t e1000_set_phy_mode(struct e1000_hw *hw);

/* IGP cable length table */
static const
uint16_t e1000_igp_cable_length_table[IGP01E1000_AGC_LENGTH_TABLE_SIZE] =
    { 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
      5, 10, 10, 10, 10, 10, 10, 10, 20, 20, 20, 20, 20, 25, 25, 25,
      25, 25, 25, 25, 30, 30, 30, 30, 40, 40, 40, 40, 40, 40, 40, 40,
      40, 50, 50, 50, 50, 50, 50, 50, 60, 60, 60, 60, 60, 60, 60, 60,
      60, 70, 70, 70, 70, 70, 70, 80, 80, 80, 80, 80, 80, 90, 90, 90,
      90, 90, 90, 90, 90, 90, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100,
      100, 100, 100, 100, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110,
      110, 110, 110, 110, 110, 110, 120, 120, 120, 120, 120, 120, 120, 120, 120, 120};


/******************************************************************************
 * Set the phy type member in the hw struct.
 *
 * hw - Struct containing variables accessed by shared code
 *****************************************************************************/
int32_t
e1000_set_phy_type(struct e1000_hw *hw)
{
    DEBUGFUNC("e1000_set_phy_type");

    switch(hw->phy_id) {
    case M88E1000_E_PHY_ID:
    case M88E1000_I_PHY_ID:
    case M88E1011_I_PHY_ID:
        hw->phy_type = e1000_phy_m88;
        break;
    case IGP01E1000_I_PHY_ID:
        if(hw->mac_type == e1000_82541 ||
           hw->mac_type == e1000_82541_rev_2 ||
           hw->mac_type == e1000_82547 ||
           hw->mac_type == e1000_82547_rev_2) {
            hw->phy_type = e1000_phy_igp;
            break;
        }
        /* Fall Through */
    default:
        /* Should never have loaded on this device */
        hw->phy_type = e1000_phy_undefined;
        return -E1000_ERR_PHY_TYPE;
    }

    return E1000_SUCCESS;
}

/******************************************************************************
 * IGP phy init script - initializes the GbE PHY
 *
 * hw - Struct containing variables accessed by shared code
 *****************************************************************************/
static void
e1000_phy_init_script(struct e1000_hw *hw)
{
    uint32_t ret_val;
    uint16_t phy_saved_data;

    DEBUGFUNC("e1000_phy_init_script");


    if(hw->phy_init_script) {
        msec_delay(20);

        /* Save off the current value of register 0x2F5B to be restored at
         * the end of this routine. */
        ret_val = e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data);

        /* Disabled the PHY transmitter */
        e1000_write_phy_reg(hw, 0x2F5B, 0x0003);

        msec_delay(20);

        e1000_write_phy_reg(hw,0x0000,0x0140);

        msec_delay(5);

        switch(hw->mac_type) {
        case e1000_82541:
        case e1000_82547:
            e1000_write_phy_reg(hw, 0x1F95, 0x0001);

            e1000_write_phy_reg(hw, 0x1F71, 0xBD21);

            e1000_write_phy_reg(hw, 0x1F79, 0x0018);

            e1000_write_phy_reg(hw, 0x1F30, 0x1600);

            e1000_write_phy_reg(hw, 0x1F31, 0x0014);

            e1000_write_phy_reg(hw, 0x1F32, 0x161C);

            e1000_write_phy_reg(hw, 0x1F94, 0x0003);

            e1000_write_phy_reg(hw, 0x1F96, 0x003F);

            e1000_write_phy_reg(hw, 0x2010, 0x0008);
            break;

        case e1000_82541_rev_2:
        case e1000_82547_rev_2:
            e1000_write_phy_reg(hw, 0x1F73, 0x0099);
            break;
        default:
            break;
        }

        e1000_write_phy_reg(hw, 0x0000, 0x3300);

        msec_delay(20);

        /* Now enable the transmitter */
        e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data);

        if(hw->mac_type == e1000_82547) {
            uint16_t fused, fine, coarse;

            /* Move to analog registers page */
            e1000_read_phy_reg(hw, IGP01E1000_ANALOG_SPARE_FUSE_STATUS, &fused);

            if(!(fused & IGP01E1000_ANALOG_SPARE_FUSE_ENABLED)) {
                e1000_read_phy_reg(hw, IGP01E1000_ANALOG_FUSE_STATUS, &fused);

                fine = fused & IGP01E1000_ANALOG_FUSE_FINE_MASK;
                coarse = fused & IGP01E1000_ANALOG_FUSE_COARSE_MASK;

                if(coarse > IGP01E1000_ANALOG_FUSE_COARSE_THRESH) {
                    coarse -= IGP01E1000_ANALOG_FUSE_COARSE_10;
                    fine -= IGP01E1000_ANALOG_FUSE_FINE_1;
                } else if(coarse == IGP01E1000_ANALOG_FUSE_COARSE_THRESH)
                    fine -= IGP01E1000_ANALOG_FUSE_FINE_10;

                fused = (fused & IGP01E1000_ANALOG_FUSE_POLY_MASK) |
                        (fine & IGP01E1000_ANALOG_FUSE_FINE_MASK) |
                        (coarse & IGP01E1000_ANALOG_FUSE_COARSE_MASK);

                e1000_write_phy_reg(hw, IGP01E1000_ANALOG_FUSE_CONTROL, fused);
                e1000_write_phy_reg(hw, IGP01E1000_ANALOG_FUSE_BYPASS,
                                    IGP01E1000_ANALOG_FUSE_ENABLE_SW_CONTROL);
            }
        }
    }
}

/******************************************************************************
 * Set the mac type member in the hw struct.
 *
 * hw - Struct containing variables accessed by shared code
 *****************************************************************************/
int32_t
e1000_set_mac_type(struct e1000_hw *hw)
{
    DEBUGFUNC("e1000_set_mac_type");

    switch (hw->device_id) {
    case E1000_DEV_ID_82542:
        switch (hw->revision_id) {
        case E1000_82542_2_0_REV_ID:
            hw->mac_type = e1000_82542_rev2_0;
            break;
        case E1000_82542_2_1_REV_ID:
            hw->mac_type = e1000_82542_rev2_1;
            break;
        default:
            /* Invalid 82542 revision ID */
            return -E1000_ERR_MAC_TYPE;
        }
        break;
    case E1000_DEV_ID_82543GC_FIBER:
    case E1000_DEV_ID_82543GC_COPPER:
        hw->mac_type = e1000_82543;
        break;
    case E1000_DEV_ID_82544EI_COPPER:
    case E1000_DEV_ID_82544EI_FIBER:
    case E1000_DEV_ID_82544GC_COPPER:
    case E1000_DEV_ID_82544GC_LOM:
        hw->mac_type = e1000_82544;
        break;
    case E1000_DEV_ID_82540EM:
    case E1000_DEV_ID_82540EM_LOM:
    case E1000_DEV_ID_82540EP:
    case E1000_DEV_ID_82540EP_LOM:
    case E1000_DEV_ID_82540EP_LP:
        hw->mac_type = e1000_82540;
        break;
    case E1000_DEV_ID_82545EM_COPPER:
    case E1000_DEV_ID_82545EM_FIBER:
        hw->mac_type = e1000_82545;
        break;
    case E1000_DEV_ID_82545GM_COPPER:
    case E1000_DEV_ID_82545GM_FIBER:
    case E1000_DEV_ID_82545GM_SERDES:
        hw->mac_type = e1000_82545_rev_3;
        break;
    case E1000_DEV_ID_82546EB_COPPER:
    case E1000_DEV_ID_82546EB_FIBER:
    case E1000_DEV_ID_82546EB_QUAD_COPPER:
        hw->mac_type = e1000_82546;
        break;
    case E1000_DEV_ID_82546GB_COPPER:
    case E1000_DEV_ID_82546GB_FIBER:
    case E1000_DEV_ID_82546GB_SERDES:
    case E1000_DEV_ID_82546GB_PCIE:
        hw->mac_type = e1000_82546_rev_3;
        break;
    case E1000_DEV_ID_82541EI:
    case E1000_DEV_ID_82541EI_MOBILE:
        hw->mac_type = e1000_82541;
        break;
    case E1000_DEV_ID_82541ER:
    case E1000_DEV_ID_82541GI:
    case E1000_DEV_ID_82541GI_LF:
    case E1000_DEV_ID_82541GI_MOBILE:
        hw->mac_type = e1000_82541_rev_2;
        break;
    case E1000_DEV_ID_82547EI:
        hw->mac_type = e1000_82547;
        break;
    case E1000_DEV_ID_82547GI:
        hw->mac_type = e1000_82547_rev_2;
        break;
    default:
        /* Should never have loaded on this device */
        return -E1000_ERR_MAC_TYPE;
    }

    switch(hw->mac_type) {
    case e1000_82541:
    case e1000_82547:
    case e1000_82541_rev_2:
    case e1000_82547_rev_2:
        hw->asf_firmware_present = TRUE;
        break;
    default:
        break;
    }

    return E1000_SUCCESS;
}

/*****************************************************************************
 * Set media type and TBI compatibility.
 *
 * hw - Struct containing variables accessed by shared code
 * **************************************************************************/
void
e1000_set_media_type(struct e1000_hw *hw)
{
    uint32_t status;

    DEBUGFUNC("e1000_set_media_type");

    if(hw->mac_type != e1000_82543) {
        /* tbi_compatibility is only valid on 82543 */
        hw->tbi_compatibility_en = FALSE;
    }

    switch (hw->device_id) {
    case E1000_DEV_ID_82545GM_SERDES:
    case E1000_DEV_ID_82546GB_SERDES:
        hw->media_type = e1000_media_type_internal_serdes;
        break;
    default:
        if(hw->mac_type >= e1000_82543) {
            status = E1000_READ_REG(hw, STATUS);
            if(status & E1000_STATUS_TBIMODE) {
                hw->media_type = e1000_media_type_fiber;
                /* tbi_compatibility not valid on fiber */
                hw->tbi_compatibility_en = FALSE;
            } else {
                hw->media_type = e1000_media_type_copper;
            }
        } else {
            /* This is an 82542 (fiber only) */
            hw->media_type = e1000_media_type_fiber;
        }
    }
}

/******************************************************************************
 * Reset the transmit and receive units; mask and clear all interrupts.
 *
 * hw - Struct containing variables accessed by shared code
 *****************************************************************************/