e1000: Make PHY powerup/down a function

In relation to the irq work done earlier we also move the PHY powerup
and powerdown functions into separate functions and move the calls to
_close and _open, making the PHY stay in it's power state as long as
the device is _up.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>

1 files changed, 49 insertions, 27 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 52d698bb2595..813d5e0e458d 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -428,14 +428,6 @@ e1000_up(struct e1000_adapter *adapter)
 
         /* hardware has been reset, we need to reload some things */
 
-        /* Reset the PHY if it was previously powered down */
-        if (adapter->hw.media_type == e1000_media_type_copper) {
-                uint16_t mii_reg;
-                e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
-                if (mii_reg & MII_CR_POWER_DOWN)
-                        e1000_phy_hw_reset(&adapter->hw);
-        }
-
         e1000_set_multi(netdev);
 
         e1000_restore_vlan(adapter);
@@ -464,12 +456,56 @@ e1000_up(struct e1000_adapter *adapter)
         return 0;
 }
 
+/**
+ * e1000_power_up_phy - restore link in case the phy was powered down
+ * @adapter: address of board private structure
+ *
+ * The phy may be powered down to save power and turn off link when the
+ * driver is unloaded and wake on lan is not enabled (among others)
+ * *** this routine MUST be followed by a call to e1000_reset ***
+ *
+ **/
+
+static void e1000_power_up_phy(struct e1000_adapter *adapter)
+{
+        uint16_t mii_reg = 0;
+
+        /* Just clear the power down bit to wake the phy back up */
+        if (adapter->hw.media_type == e1000_media_type_copper) {
+                /* according to the manual, the phy will retain its
+                 * settings across a power-down/up cycle */
+                e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
+                mii_reg &= ~MII_CR_POWER_DOWN;
+                e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
+        }
+}
+
+static void e1000_power_down_phy(struct e1000_adapter *adapter)
+{
+        boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
+                                      e1000_check_mng_mode(&adapter->hw);
+        /* Power down the PHY so no link is implied when interface is down
+         * The PHY cannot be powered down if any of the following is TRUE
+         * (a) WoL is enabled
+         * (b) AMT is active
+         * (c) SoL/IDER session is active */
+        if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
+            adapter->hw.media_type == e1000_media_type_copper &&
+            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
+            !mng_mode_enabled &&
+            !e1000_check_phy_reset_block(&adapter->hw)) {
+                uint16_t mii_reg = 0;
+                e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
+                mii_reg |= MII_CR_POWER_DOWN;
+                e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
+                mdelay(1);
+        }
+}
+
 void
 e1000_down(struct e1000_adapter *adapter)
 {
         struct net_device *netdev = adapter->netdev;
-        boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
-                                      e1000_check_mng_mode(&adapter->hw);
 
         e1000_irq_disable(adapter);
 
@@ -489,23 +525,6 @@ e1000_down(struct e1000_adapter *adapter)
         e1000_reset(adapter);
         e1000_clean_all_tx_rings(adapter);
         e1000_clean_all_rx_rings(adapter);
-
-        /* Power down the PHY so no link is implied when interface is down *
-         * The PHY cannot be powered down if any of the following is TRUE *
-         * (a) WoL is enabled
-         * (b) AMT is active
-         * (c) SoL/IDER session is active */
-        if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
-           adapter->hw.media_type == e1000_media_type_copper &&
-           !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
-           !mng_mode_enabled &&
-           !e1000_check_phy_reset_block(&adapter->hw)) {
-                uint16_t mii_reg;
-                e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
-                mii_reg |= MII_CR_POWER_DOWN;
-                e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
-                mdelay(1);
-        }
 }
 
 void
@@ -1117,6 +1136,8 @@ e1000_open(struct net_device *netdev)
         if (err)
                 goto err_up;
 
+        e1000_power_up_phy(adapter);
+
         if ((err = e1000_up(adapter)))
                 goto err_up;
         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
@@ -1162,6 +1183,7 @@ e1000_close(struct net_device *netdev)
 
         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
         e1000_down(adapter);
+        e1000_power_down_phy(adapter);
         e1000_free_irq(adapter);
 
         e1000_free_all_tx_resources(adapter);