ep_mii_readbit
u_int16_t ep_mii_readbit(struct ep_softc *, u_int16_t);
ep_mii_readbit(sc, PHYSMGMT_CLK);
ep_mii_readbit(sc, PHYSMGMT_CLK);
err = ep_mii_readbit(sc, PHYSMGMT_DATA);
if (err == 0 && ep_mii_readbit(sc, PHYSMGMT_DATA))