uhso_tty_control
uhso_tty_control(hp, TIOCMBIS, TIOCM_DTR | TIOCM_RTS);
uhso_tty_control(hp, TIOCMBIC, TIOCM_DTR);
error = uhso_tty_control(hp, TIOCMBIS, TIOCM_DTR);
error = uhso_tty_control(hp, TIOCMBIC, TIOCM_DTR);
error = uhso_tty_control(hp, cmd, *(int *)data);
Static int uhso_tty_control(struct uhso_port *, u_long, int);