RCTL_EN
l->rctl = RCTL_EN | RCTL_LBM_NONE | RCTL_RDMTS_1_2;
CSR_WRITE(sc, WMREG_RCTL, rctl & ~RCTL_EN);
CSR_WRITE(sc, WMREG_RCTL, rctl | RCTL_EN);
CSR_WRITE(sc, WMREG_RCTL, rctl & ~RCTL_EN);
sc->sc_rctl &= ~RCTL_EN;
if ((sc->sc_rctl & RCTL_EN) != 0)
sc->sc_rctl = RCTL_EN | RCTL_LBM_NONE | RCTL_RDMTS_1_2 | RCTL_DPF
sc->sc_rctl &= ~RCTL_EN;