-/* 82599 specific loopback operation types */
-#define IXGBE_LPBK_82599_NONE 0x0 /* Default value. Loopback is disabled. */
-#define IXGBE_LPBK_82599_TX_RX 0x1 /* Tx->Rx loopback operation is enabled. */
+#define IXGBE_LPBK_NONE 0x0 /* Default value. Loopback is disabled. */
+#define IXGBE_LPBK_TX_RX 0x1 /* Tx->Rx loopback operation is enabled. */
+/* X540-X550 specific loopback operations */
+#define IXGBE_MII_AUTONEG_ENABLE 0x1000 /* Auto-negociation enable (default = 1) */