UHSO_PORT_MUXBUSY
if (ISSET(hp->hp_flags, UHSO_PORT_MUXBUSY))
CLR(hp->hp_flags, UHSO_PORT_MUXBUSY | UHSO_PORT_MUXREADY);
CLR(hp->hp_flags, UHSO_PORT_MUXBUSY);
SET(hp->hp_flags, UHSO_PORT_MUXBUSY);
CLR(hp->hp_flags, UHSO_PORT_MUXBUSY);