pch_gbe: Fix the MAC Address load issue.

Toshiharu Okada · davem330 · commit 98200ec28a66 · 2011-02-14T13:37:26.000-08:00
With the specification of hardware,
the processing at the time of driver starting was modified.

This device write automatically the MAC address read from serial ROM
into a MAC Adress1A/1B register at the time of power on reset.
However, when stable clock is not supplied,
the writing of MAC Adress1A/1B register may not be completed.
In this case, it is necessary to load MAC address to MAC Address1A/1B register
by the MAC Address1 load register.

This patch always does the above processing,
in order not to be dependent on system environment.

Signed-off-by: Toshiharu Okada &lt;toshiharu-linux@dsn.okisemi.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/drivers/net/pch_gbe/pch_gbe.h b/drivers/net/pch_gbe/pch_gbe.h
@@ -73,7 +73,7 @@ struct pch_gbe_regs {
 	struct pch_gbe_regs_mac_adr mac_adr[16];
 	u32 ADDR_MASK;
 	u32 MIIM;
-	u32 reserve2;
+	u32 MAC_ADDR_LOAD;
 	u32 RGMII_ST;
 	u32 RGMII_CTRL;
 	u32 reserve3[3];
diff --git a/drivers/net/pch_gbe/pch_gbe_main.c b/drivers/net/pch_gbe/pch_gbe_main.c
@@ -89,6 +89,12 @@ static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
 			       int data);
+
+inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
+{
+	iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
+}
+
 /**
  * pch_gbe_mac_read_mac_addr - Read MAC address
  * @hw:	            Pointer to the HW structure
@@ -2331,6 +2337,7 @@ static int pch_gbe_probe(struct pci_dev *pdev,
 	netdev->features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_GRO;
 	pch_gbe_set_ethtool_ops(netdev);
 
+	pch_gbe_mac_load_mac_addr(&adapter->hw);
 	pch_gbe_mac_reset_hw(&adapter->hw);
 
 	/* setup the private structure */
