IP1000PHY_MII_BMCR
PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
bmcr = PHY_READ(sc, IP1000PHY_MII_BMCR);
PHY_WRITE(sc, IP1000PHY_MII_BMCR, (IP1000PHY_BMCR_FDX |
reg = PHY_READ(sc, IP1000PHY_MII_BMCR);