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path: root/drivers/net/phy/phy-c45.c
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Diffstat (limited to 'drivers/net/phy/phy-c45.c')
-rw-r--r--drivers/net/phy/phy-c45.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index dada819c6b78..a4576859afae 100644
--- 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)