@@ -816,6 +816,11 @@ static void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
if (data & ~LPA_SLCT)
data |= LPA_LPACK;
break;
+ case PHY_REG_PHY_CTRL:
+ ksz_pread8(dev, p, regs[P_LINK_STATUS], &link);
+ if (link & PORT_MDIX_STATUS)
+ data |= KSZ886X_CTRL_MDIX_STAT;
+ break;
default:
processed = false;
break;
@@ -1048,6 +1048,92 @@ static int ksz8873mll_config_aneg(struct phy_device *phydev)
return 0;
}
+static int ksz886x_config_mdix(struct phy_device *phydev, u8 ctrl)
+{
+ u16 val;
+
+ switch (ctrl) {
+ case ETH_TP_MDI:
+ val = KSZ886X_BMCR_DISABLE_AUTO_MDIX;
+ break;
+ case ETH_TP_MDI_X:
+ /* Note: The naming of the bit KSZ886X_BMCR_FORCE_MDI is bit
+ * counter intuitive, the "-X" in "1 = Force MDI" in the data
+ * sheet seems to be missing:
+ * 1 = Force MDI (sic!) (transmit on RX+/RX- pins)
+ * 0 = Normal operation (transmit on TX+/TX- pins)
+ */
+ val = KSZ886X_BMCR_DISABLE_AUTO_MDIX | KSZ886X_BMCR_FORCE_MDI;
+ break;
+ case ETH_TP_MDI_AUTO:
+ val = 0;
+ break;
+ default:
+ return 0;
+ }
+
+ return phy_modify(phydev, MII_BMCR,
+ KSZ886X_BMCR_HP_MDIX | KSZ886X_BMCR_FORCE_MDI |
+ KSZ886X_BMCR_DISABLE_AUTO_MDIX,
+ KSZ886X_BMCR_HP_MDIX | val);
+}
+
+static int ksz886x_config_aneg(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = genphy_config_aneg(phydev);
+ if (ret)
+ return ret;
+
+ /* The MDI-X configuration is automatically changed by the PHY after
+ * switching from autoneg off to on. So, take MDI-X configuration under
+ * own control and set it after autoneg configuration was done.
+ */
+ return ksz886x_config_mdix(phydev, phydev->mdix_ctrl);
+}
+
+static int ksz886x_mdix_update(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = phy_read(phydev, MII_BMCR);
+ if (ret < 0)
+ return ret;
+
+ if (ret & KSZ886X_BMCR_DISABLE_AUTO_MDIX) {
+ if (ret & KSZ886X_BMCR_FORCE_MDI)
+ phydev->mdix_ctrl = ETH_TP_MDI_X;
+ else
+ phydev->mdix_ctrl = ETH_TP_MDI;
+ } else {
+ phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
+ }
+
+ ret = phy_read(phydev, MII_KSZPHY_CTRL);
+ if (ret < 0)
+ return ret;
+
+ /* Same reverse logic as KSZ886X_BMCR_FORCE_MDI */
+ if (ret & KSZ886X_CTRL_MDIX_STAT)
+ phydev->mdix = ETH_TP_MDI_X;
+ else
+ phydev->mdix = ETH_TP_MDI;
+
+ return 0;
+}
+
+static int ksz886x_read_status(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = ksz886x_mdix_update(phydev);
+ if (ret < 0)
+ return ret;
+
+ return genphy_read_status(phydev);
+}
+
static int ksz886x_resume(struct phy_device *phydev)
{
int ret;
@@ -1420,6 +1506,8 @@ static struct phy_driver ksphy_driver[] = {
.name = "Micrel KSZ8851 Ethernet MAC or KSZ886X Switch",
/* PHY_BASIC_FEATURES */
.config_init = kszphy_config_init,
+ .config_aneg = ksz886x_config_aneg,
+ .read_status = ksz886x_read_status,
.suspend = genphy_suspend,
.resume = ksz886x_resume,
}, {
@@ -58,4 +58,6 @@
#define KSZ886X_BMCR_DISABLE_TRANSMIT BIT(1)
#define KSZ886X_BMCR_DISABLE_LED BIT(0)
+#define KSZ886X_CTRL_MDIX_STAT BIT(4)
+
#endif /* _MICREL_PHY_H */
Add support for MDI-X status and configuration Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- drivers/net/dsa/microchip/ksz8795.c | 5 ++ drivers/net/phy/micrel.c | 88 +++++++++++++++++++++++++++++ include/linux/micrel_phy.h | 2 + 3 files changed, 95 insertions(+)