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author | Nick Nunley <nicholasx.d.nunley@intel.com> | 2010-02-17 01:01:59 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2010-02-17 13:21:33 -0800 |
commit | 88a268c1a11a2e94b7c55a8cfe97892d845887c8 (patch) | |
tree | b748dcd6491b17376c984145c2dca02165d92547 /drivers/net/igb/e1000_phy.c | |
parent | 53c992fa8497286f24f279ebec5a8c7a58d4e68c (diff) | |
download | op-kernel-dev-88a268c1a11a2e94b7c55a8cfe97892d845887c8.zip op-kernel-dev-88a268c1a11a2e94b7c55a8cfe97892d845887c8.tar.gz |
igb: Power down link when interface is down
This changes the behavior of the driver to power down the link
when the associated interface is down, unless management is enabled.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/igb/e1000_phy.c')
-rw-r--r-- | drivers/net/igb/e1000_phy.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/net/igb/e1000_phy.c b/drivers/net/igb/e1000_phy.c index 3670a66..cf1f323 100644 --- a/drivers/net/igb/e1000_phy.c +++ b/drivers/net/igb/e1000_phy.c @@ -1931,6 +1931,41 @@ s32 igb_phy_init_script_igp3(struct e1000_hw *hw) } /** + * igb_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, restore the link to previous settings. + **/ +void igb_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); +} + +/** + * igb_power_down_phy_copper - Power down copper PHY + * @hw: pointer to the HW structure + * + * Power down PHY to save power when interface is down and wake on lan + * is not enabled. + **/ +void igb_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); + msleep(1); +} + +/** * igb_check_polarity_82580 - Checks the polarity. * @hw: pointer to the HW structure * |