[dpdk-dev] [PATCH 11/26] ixgbe/base: restore ESDP settings after MAC reset

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

The I2C mux control relies on the SDP setting in the ESDP register
so it is necessary to restore the value after a MAC reset. So,
put the code in a function so it can be used in more than one place.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ixgbe/base/ixgbe_x550.c | 41 ++++++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ixgbe/base/ixgbe_x550.c b/drivers/net/ixgbe/base/ixgbe_x550.c
index c91e737..319aa0d 100644
--- a/drivers/net/ixgbe/base/ixgbe_x550.c
+++ b/drivers/net/ixgbe/base/ixgbe_x550.c
@@ -264,6 +264,23 @@ STATIC void ixgbe_check_cs4227(struct ixgbe_hw *hw)
 }
 
 /**
+ * ixgbe_setup_mux_ctl - Setup ESDP register for I2C mux control
+ * @hw: pointer to hardware structure
+ **/
+STATIC void ixgbe_setup_mux_ctl(struct ixgbe_hw *hw)
+{
+	u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
+
+	if (hw->bus.lan_id) {
+		esdp &= ~(IXGBE_ESDP_SDP1_NATIVE | IXGBE_ESDP_SDP1);
+		esdp |= IXGBE_ESDP_SDP1_DIR;
+	}
+	esdp &= ~(IXGBE_ESDP_SDP0_NATIVE | IXGBE_ESDP_SDP0_DIR);
+	IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
+	IXGBE_WRITE_FLUSH(hw);
+}
+
+/**
  * ixgbe_identify_phy_x550em - Get PHY type based on device id
  * @hw: pointer to hardware structure
  *
@@ -271,20 +288,11 @@ STATIC void ixgbe_check_cs4227(struct ixgbe_hw *hw)
  */
 STATIC s32 ixgbe_identify_phy_x550em(struct ixgbe_hw *hw)
 {
-	u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
-
 	switch (hw->device_id) {
 	case IXGBE_DEV_ID_X550EM_X_SFP:
 		/* set up for CS4227 usage */
 		hw->phy.phy_semaphore_mask = IXGBE_GSSR_SHARED_I2C_SM;
-		if (hw->bus.lan_id) {
-
-			esdp &= ~(IXGBE_ESDP_SDP1_NATIVE | IXGBE_ESDP_SDP1);
-			esdp |= IXGBE_ESDP_SDP1_DIR;
-		}
-		esdp &= ~(IXGBE_ESDP_SDP0_NATIVE | IXGBE_ESDP_SDP0_DIR);
-		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
-
+		ixgbe_setup_mux_ctl(hw);
 		ixgbe_check_cs4227(hw);
 
 		return ixgbe_identify_module_generic(hw);
@@ -1099,20 +1107,12 @@ s32 ixgbe_init_phy_ops_X550em(struct ixgbe_hw *hw)
 {
 	struct ixgbe_phy_info *phy = &hw->phy;
 	s32 ret_val;
-	u32 esdp;
 
 	DEBUGFUNC("ixgbe_init_phy_ops_X550em");
 
 	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_SFP) {
-		esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
 		phy->phy_semaphore_mask = IXGBE_GSSR_SHARED_I2C_SM;
-
-		if (hw->bus.lan_id) {
-			esdp &= ~(IXGBE_ESDP_SDP1_NATIVE | IXGBE_ESDP_SDP1);
-			esdp |= IXGBE_ESDP_SDP1_DIR;
-		}
-		esdp &= ~(IXGBE_ESDP_SDP0_NATIVE | IXGBE_ESDP_SDP0_DIR);
-		IXGBE_WRITE_REG(hw, IXGBE_ESDP, esdp);
+		ixgbe_setup_mux_ctl(hw);
 	}
 
 	/* Identify the PHY or SFP module */
@@ -1269,6 +1269,9 @@ mac_reset_top:
 	hw->mac.ops.init_rx_addrs(hw);
 
 
+	if (hw->device_id == IXGBE_DEV_ID_X550EM_X_SFP)
+		ixgbe_setup_mux_ctl(hw);
+
 	return status;
 }
 
-- 
1.9.3