IWM_CSR_INT
r1 = IWM_READ(sc, IWM_CSR_INT);
IWM_WRITE(sc, IWM_CSR_INT, r1 | ~sc->sc_intmask);
IWM_WRITE(sc, IWM_CSR_INT, IWM_CSR_INT_BIT_RX_PERIODIC);
IWM_WRITE(sc, IWM_CSR_INT, 0xffffffff);
IWM_WRITE(sc, IWM_CSR_INT, ~0);
IWM_WRITE(sc, IWM_CSR_INT, ~0);
IWM_WRITE(sc, IWM_CSR_INT, ~0);
IWM_WRITE(sc, IWM_CSR_INT, ~0);