IXPCOMSPEED2BRD
sc->sc_speed = IXPCOMSPEED2BRD(ixpcomcn_sc.sc_ospeed);
ixpcom_cr = IXPCOMSPEED2BRD(DEFAULT_COMSPEED)
cr = IXPCOMSPEED2BRD(t->c_ospeed);
cr |= IXPCOMSPEED2BRD(ospeed);