PHYREG_CONTROL
tulip_mii_writereg(sc, phyaddr, PHYREG_CONTROL, PHYCTL_RESET);
u_int32_t data = tulip_mii_readreg(sc, phyaddr, PHYREG_CONTROL);
tulip_mii_writereg(sc, phyaddr, PHYREG_CONTROL, data|PHYCTL_AUTONEG_RESTART|PHYCTL_AUTONEG_ENABLE);
data = tulip_mii_readreg(sc, phyaddr, PHYREG_CONTROL);
tulip_mii_readreg(sc, phyaddr, PHYREG_CONTROL));
u_int32_t data = tulip_mii_readreg(sc, sc->tulip_phyaddr, PHYREG_CONTROL);
tulip_mii_writereg(sc, sc->tulip_phyaddr, PHYREG_CONTROL, data);