XMPHY_MII_BMCR
if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
PHY_WRITE(mii, XMPHY_MII_BMCR,