e1000e: Clear ULP configuration register on ULP exit

There have been bugs caused by HW ULP configuration settings not being
properly cleared after cable connect in V-Pro capable systems.
This caused HW to get out of sync occasionally.
The fix ensures that ULP settings are cleared in HW after
LAN cable re-connect.

Signed-off-by: Raanan Avargil <raanan.avargil@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/e1000e/ich8lan.c

@@ -1328,6 +1328,8 @@ static s32 e1000_disable_ulp_lpt_lp(struct e1000_hw *hw, bool force)
 		     I218_ULP_CONFIG1_RESET_TO_SMBUS |
 		     I218_ULP_CONFIG1_WOL_HOST |
 		     I218_ULP_CONFIG1_INBAND_EXIT |
+		     I218_ULP_CONFIG1_EN_ULP_LANPHYPC |
+		     I218_ULP_CONFIG1_DIS_CLR_STICKY_ON_PERST |
 		     I218_ULP_CONFIG1_DISABLE_SMB_PERST);
 	e1000_write_phy_reg_hv_locked(hw, I218_ULP_CONFIG1, phy_reg);
 

drivers/net/ethernet/intel/e1000e/ich8lan.h

@@ -188,6 +188,10 @@
 #define I218_ULP_CONFIG1_INBAND_EXIT	0x0020	/* Inband on ULP exit */
 #define I218_ULP_CONFIG1_WOL_HOST	0x0040	/* WoL Host on ULP exit */
 #define I218_ULP_CONFIG1_RESET_TO_SMBUS	0x0100	/* Reset to SMBus mode */
+/* enable ULP even if when phy powered down via lanphypc */
+#define I218_ULP_CONFIG1_EN_ULP_LANPHYPC	0x0400
+/* disable clear of sticky ULP on PERST */
+#define I218_ULP_CONFIG1_DIS_CLR_STICKY_ON_PERST	0x0800
 #define I218_ULP_CONFIG1_DISABLE_SMB_PERST	0x1000	/* Disable on PERST# */
 
 /* SMBus Address Phy Register */