net: phy: marvell10g: add MDI swap reporting

[linux-block.git] / drivers / net / phy / phy-c45.c

diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index dada819c6b78cdaec225f841189f39153bd55bf3..a4576859afae429c8d7ac9955459c3f187bd35dd 100644 (file)
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -233,6 +233,39 @@ int genphy_c45_read_pma(struct phy_device *phydev)
 }
 EXPORT_SYMBOL_GPL(genphy_c45_read_pma);
 
+/**
+ * genphy_c45_read_mdix - read mdix status from PMA
+ * @phydev: target phy_device struct
+ */
+int genphy_c45_read_mdix(struct phy_device *phydev)
+{
+       int val;
+
+       if (phydev->speed == SPEED_10000) {
+               val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD,
+                                  MDIO_PMA_10GBT_SWAPPOL);
+               if (val < 0)
+                       return val;
+
+               switch (val) {
+               case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
+                       phydev->mdix = ETH_TP_MDI;
+                       break;
+
+               case 0:
+                       phydev->mdix = ETH_TP_MDI_X;
+                       break;
+
+               default:
+                       phydev->mdix = ETH_TP_MDI_INVALID;
+                       break;
+               }
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(genphy_c45_read_mdix);
+
 /* The gen10g_* functions are the old Clause 45 stub */
 
 static int gen10g_config_aneg(struct phy_device *phydev)