Commit ee04022a authored by Auke Kok's avatar Auke Kok Committed by Auke Kok
Browse files

e1000: M88 PHY workaround 



M88 rev 2 PHY needs a longer downshift to function properly. This adds
a much longer downshift counter for this specific device.

Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarAuke Kok <auke-jan.h.kok@intel.com>
parent f1b3a853

drivers/net/e1000/e1000_hw.c

+29 −17
Original line number Diff line number Diff line
@@ -1569,6 +1569,7 @@ e1000_copper_link_mgp_setup(struct e1000_hw *hw) 
    if (ret_val)

        return ret_val;



    if (hw->phy_revision < M88E1011_I_REV_4) {

        /* Force TX_CLK in the Extended PHY Specific Control Register

         * to 25MHz clock.

         */
@@ -1578,16 +1579,27 @@ e1000_copper_link_mgp_setup(struct e1000_hw *hw) 


        phy_data |= M88E1000_EPSCR_TX_CLK_25;



    if (hw->phy_revision < M88E1011_I_REV_4) {

        if ((hw->phy_revision == E1000_REVISION_2) &&

            (hw->phy_id == M88E1111_I_PHY_ID)) {

            /* Vidalia Phy, set the downshift counter to 5x */

            phy_data &= ~(M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK);

            phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;

            ret_val = e1000_write_phy_reg(hw,

                                        M88E1000_EXT_PHY_SPEC_CTRL, phy_data);

            if (ret_val)

                return ret_val;

        } 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 = e1000_write_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);

            ret_val = e1000_write_phy_reg(hw,

                                        M88E1000_EXT_PHY_SPEC_CTRL, phy_data);

            if (ret_val)

               return ret_val;

        }

    }



    /* SW Reset the PHY so all changes take effect */

    ret_val = e1000_phy_reset(hw);

drivers/net/e1000/e1000_hw.h

+11 −0
Original line number Diff line number Diff line
@@ -2765,6 +2765,17 @@ struct e1000_host_command_info { 
#define M88E1000_EPSCR_TX_CLK_25      0x0070 /* 25  MHz TX_CLK */

#define M88E1000_EPSCR_TX_CLK_0       0x0000 /* NO  TX_CLK */



/* M88EC018 Rev 2 specific DownShift settings */

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK  0x0E00

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_1X    0x0000

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_2X    0x0200

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_3X    0x0400

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_4X    0x0600

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X    0x0800

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_6X    0x0A00

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_7X    0x0C00

#define M88EC018_EPSCR_DOWNSHIFT_COUNTER_8X    0x0E00



/* IGP01E1000 Specific Port Config Register - R/W */

#define IGP01E1000_PSCFR_AUTO_MDIX_PAR_DETECT  0x0010

#define IGP01E1000_PSCFR_PRE_EN                0x0020

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