igb: add support for the 82580 phy

This patch adds support for the phy included in the 82580 silicon family.

Signed-off-by: Alexander Duyck <alexander.h.duyck@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/igb/e1000_phy.h b/drivers/net/igb/e1000_phy.h
index adb9436..e23b021 100644
--- a/drivers/net/igb/e1000_phy.h
+++ b/drivers/net/igb/e1000_phy.h
@@ -63,6 +63,11 @@
 s32  igb_phy_init_script_igp3(struct e1000_hw *hw);
 s32  igb_read_phy_reg_i2c(struct e1000_hw *hw, u32 offset, u16 *data);
 s32  igb_write_phy_reg_i2c(struct e1000_hw *hw, u32 offset, u16 data);
+s32  igb_copper_link_setup_82580(struct e1000_hw *hw);
+s32  igb_check_polarity_82580(struct e1000_hw *hw);
+s32  igb_get_phy_info_82580(struct e1000_hw *hw);
+s32  igb_phy_force_speed_duplex_82580(struct e1000_hw *hw);
+s32  igb_get_cable_length_82580(struct e1000_hw *hw);
 
 /* IGP01E1000 Specific Registers */
 #define IGP01E1000_PHY_PORT_CONFIG        0x10 /* Port Config */
@@ -77,6 +82,33 @@
 #define IGP01E1000_PSCR_FORCE_MDI_MDIX    0x2000 /* 0=MDI, 1=MDIX */
 #define IGP01E1000_PSCFR_SMART_SPEED      0x0080
 
+#define I82580_ADDR_REG                   16
+#define I82580_CFG_REG                    22
+#define I82580_CFG_ASSERT_CRS_ON_TX       (1 << 15)
+#define I82580_CFG_ENABLE_DOWNSHIFT       (3 << 10) /* auto downshift 100/10 */
+#define I82580_CTRL_REG                   23
+#define I82580_CTRL_DOWNSHIFT_MASK        (7 << 10)
+
+/* 82580 specific PHY registers */
+#define I82580_PHY_CTRL_2            18
+#define I82580_PHY_LBK_CTRL          19
+#define I82580_PHY_STATUS_2          26
+#define I82580_PHY_DIAG_STATUS       31
+
+/* I82580 PHY Status 2 */
+#define I82580_PHY_STATUS2_REV_POLARITY   0x0400
+#define I82580_PHY_STATUS2_MDIX           0x0800
+#define I82580_PHY_STATUS2_SPEED_MASK     0x0300
+#define I82580_PHY_STATUS2_SPEED_1000MBPS 0x0200
+#define I82580_PHY_STATUS2_SPEED_100MBPS  0x0100
+
+/* I82580 PHY Control 2 */
+#define I82580_PHY_CTRL2_AUTO_MDIX        0x0400
+#define I82580_PHY_CTRL2_FORCE_MDI_MDIX   0x0200
+
+/* I82580 PHY Diagnostics Status */
+#define I82580_DSTATUS_CABLE_LENGTH       0x03FC
+#define I82580_DSTATUS_CABLE_LENGTH_SHIFT 2
 /* Enable flexible speed on link-up */
 #define IGP02E1000_PM_D0_LPLU             0x0002 /* For D0a states */
 #define IGP02E1000_PM_D3_LPLU             0x0004 /* For all other states */