ixgbe: add 1g PHY support for 82599

Add support for 1G SFP+ PHY's to 82599.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbe/ixgbe_82599.c b/drivers/net/ixgbe/ixgbe_82599.c
index 976fd9e..0ee175a 100644
--- a/drivers/net/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ixgbe/ixgbe_82599.c
@@ -206,6 +206,14 @@
 	s32 status = 0;
 	u32 autoc = 0;
 
+	/* Determine 1G link capabilities off of SFP+ type */
+	if (hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0 ||
+	    hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core1) {
+		*speed = IXGBE_LINK_SPEED_1GB_FULL;
+		*negotiation = true;
+		goto out;
+	}
+
 	/*
 	 * Determine link capabilities based on the stored value of AUTOC,
 	 * which represents EEPROM defaults.  If AUTOC value has not been
@@ -2087,6 +2095,7 @@
 	u32 pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
 	u16 ext_ability = 0;
 	u8 comp_codes_10g = 0;
+	u8 comp_codes_1g = 0;
 
 	hw->phy.ops.identify(hw);
 
@@ -2167,11 +2176,15 @@
 	case ixgbe_phy_sfp_intel:
 	case ixgbe_phy_sfp_unknown:
 		hw->phy.ops.read_i2c_eeprom(hw,
+		      IXGBE_SFF_1GBE_COMP_CODES, &comp_codes_1g);
+		hw->phy.ops.read_i2c_eeprom(hw,
 		      IXGBE_SFF_10GBE_COMP_CODES, &comp_codes_10g);
 		if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
 			physical_layer = IXGBE_PHYSICAL_LAYER_10GBASE_SR;
 		else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
 			physical_layer = IXGBE_PHYSICAL_LAYER_10GBASE_LR;
+		else if (comp_codes_1g & IXGBE_SFF_1GBASET_CAPABLE)
+			physical_layer = IXGBE_PHYSICAL_LAYER_1000BASE_T;
 		break;
 	default:
 		break;