From ed8ebafe981a66db94420705ffab6590862c3e2f Mon Sep 17 00:00:00 2001
From: Wenzhuo Lu <wenzhuo.lu@intel.com>
Date: Fri, 16 Oct 2015 10:51:18 +0800
Subject: [PATCH] e1000/base: synchronize PHY interface on non-ME systems
On power up, the MAC - PHY interface needs to be set to PCIe, even if
cable is disconnected. In ME systems, the ME handles this on exit from
Sx(Sticky mode) state. In non-ME, the driver handles it. Added a check
for non-ME system to the driver code that handles that.
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
drivers/net/e1000/base/e1000_ich8lan.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/net/e1000/base/e1000_ich8lan.c b/drivers/net/e1000/base/e1000_ich8lan.c
index 70eba710b1..6dc053f836 100644
--- a/drivers/net/e1000/base/e1000_ich8lan.c
+++ b/drivers/net/e1000/base/e1000_ich8lan.c
@@ -234,15 +234,19 @@ STATIC bool e1000_phy_is_accessible_pchlan(struct e1000_hw *hw)
return false;
out:
if (hw->mac.type == e1000_pch_lpt) {
- /* Unforce SMBus mode in PHY */
- hw->phy.ops.read_reg_locked(hw, CV_SMB_CTRL, &phy_reg);
- phy_reg &= ~CV_SMB_CTRL_FORCE_SMBUS;
- hw->phy.ops.write_reg_locked(hw, CV_SMB_CTRL, phy_reg);
+ /* Only unforce SMBus if ME is not active */
+ if (!(E1000_READ_REG(hw, E1000_FWSM) &
+ E1000_ICH_FWSM_FW_VALID)) {
+ /* Unforce SMBus mode in PHY */
+ hw->phy.ops.read_reg_locked(hw, CV_SMB_CTRL, &phy_reg);
+ phy_reg &= ~CV_SMB_CTRL_FORCE_SMBUS;
+ hw->phy.ops.write_reg_locked(hw, CV_SMB_CTRL, phy_reg);
- /* Unforce SMBus mode in MAC */
- mac_reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
- mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS;
- E1000_WRITE_REG(hw, E1000_CTRL_EXT, mac_reg);
+ /* Unforce SMBus mode in MAC */
+ mac_reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
+ mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS;
+ E1000_WRITE_REG(hw, E1000_CTRL_EXT, mac_reg);
+ }
}
return true;
--
2.39.5