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authorBruce Allan <bruce.w.allan@intel.com>2009-10-26 11:22:47 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-26 16:16:18 -0700
commitdb2932ecf8dc07f65b410e921f96c5c51170c0ae (patch)
treeb98ee7bcf484dfa04d1906aae860bba21b2a6396 /drivers/net
parent39305965f31e080d6ed96e0ff51ed11e7639d52e (diff)
e1000e: clear PHY wakeup bit after LCD reset on 82577/82578
Performing a dummy read of the PHY Wakeup Control (WUC) register clears the wakeup enable bit set by an PHY reset. If this bit remains set, link problems may occur. Signed-off-by: Bruce Allan <bruce.w.allan@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')
-rw-r--r--drivers/net/e1000e/ich8lan.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index aa0ab0eb8c7..ead66510e22 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -844,7 +844,7 @@ static s32 e1000_phy_hw_reset_ich8lan(struct e1000_hw *hw)
u32 i;
u32 data, cnf_size, cnf_base_addr, sw_cfg_mask;
s32 ret_val;
- u16 word_addr, reg_data, reg_addr, phy_page = 0;
+ u16 reg, word_addr, reg_data, reg_addr, phy_page = 0;
ret_val = e1000e_phy_hw_reset_generic(hw);
if (ret_val)
@@ -859,6 +859,10 @@ static s32 e1000_phy_hw_reset_ich8lan(struct e1000_hw *hw)
return ret_val;
}
+ /* Dummy read to clear the phy wakeup bit after lcd reset */
+ if (hw->mac.type == e1000_pchlan)
+ e1e_rphy(hw, BM_WUC, &reg);
+
/*
* Initialize the PHY from the NVM on ICH platforms. This
* is needed due to an issue where the NVM configuration is
@@ -2229,6 +2233,7 @@ static s32 e1000_get_bus_info_ich8lan(struct e1000_hw *hw)
**/
static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw)
{
+ u16 reg;
u32 ctrl, icr, kab;
s32 ret_val;
@@ -2304,6 +2309,9 @@ static s32 e1000_reset_hw_ich8lan(struct e1000_hw *hw)
hw_dbg(hw, "Auto Read Done did not complete\n");
}
}
+ /* Dummy read to clear the phy wakeup bit after lcd reset */
+ if (hw->mac.type == e1000_pchlan)
+ e1e_rphy(hw, BM_WUC, &reg);
/*
* For PCH, this write will make sure that any noise