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igb: Clear Go Link Disconnect for 82580 and later devices

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Customers are requesting that the hw prevents PHY from establishing link
until the driver loads.  This patch clears the Go Link Disconnect bit which
provides the requested behavior on parts 82580 and later.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Carolyn Wyborny 2012-11-13 04:03:20 +00:00 committed by David S. Miller
parent 85624caff9
commit 867eb39e8b
2 changed files with 9 additions and 0 deletions
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8
drivers/net/ethernet/intel/igb/e1000_82575.c
View file

@ -1278,12 +1278,20 @@ static s32 igb_setup_copper_link_82575(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
u32 phpm_reg;
ctrl = rd32(E1000_CTRL);
ctrl |= E1000_CTRL_SLU;
ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
wr32(E1000_CTRL, ctrl);
/* Clear Go Link Disconnect bit */
if (hw->mac.type >= e1000_82580) {
phpm_reg = rd32(E1000_82580_PHY_POWER_MGMT);
phpm_reg &= ~E1000_82580_PM_GO_LINKD;
wr32(E1000_82580_PHY_POWER_MGMT, phpm_reg);
}
ret_val = igb_setup_serdes_link_82575(hw);
if (ret_val)
goto out;

1
drivers/net/ethernet/intel/igb/e1000_phy.h
View file

@ -124,6 +124,7 @@ s32 igb_check_polarity_m88(struct e1000_hw *hw);
#define E1000_82580_PM_SPD 0x0001 /* Smart Power Down */
#define E1000_82580_PM_D0_LPLU 0x0002 /* For D0a states */
#define E1000_82580_PM_D3_LPLU 0x0004 /* For all other states */
#define E1000_82580_PM_GO_LINKD 0x0020 /* Go Link Disconnect */
/* Enable flexible speed on link-up */
#define IGP02E1000_PM_D0_LPLU 0x0002 /* For D0a states */