BWI_RF_CHAN_EX
CSR_WRITE_2(sc, BWI_RF_CHAN_EX, 0x1100);
chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
CSR_WRITE_2(sc, BWI_RF_CHAN_EX, 0);
CSR_WRITE_2(sc, BWI_RF_CHAN_EX, chan_ex);
chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
CSR_CLRBITS_2(sc, BWI_RF_CHAN_EX, 0xdfff);
CSR_WRITE_2(sc, BWI_RF_CHAN_EX, chan_ex);
chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
CSR_SETBITS_2(sc, BWI_RF_CHAN_EX, 0x2000);
CSR_WRITE_2(sc, BWI_RF_CHAN_EX, chan_ex);
CSR_SETBITS_2(sc, BWI_RF_CHAN_EX, (1 << 11)); /* XXX */
CSR_CLRBITS_2(sc, BWI_RF_CHAN_EX, 0x840); /* XXX */
rf_chan_ex = CSR_READ_2(sc, BWI_RF_CHAN_EX);
CSR_SETBITS_2(sc, BWI_RF_CHAN_EX, 0x2000);
CSR_WRITE_2(sc, BWI_RF_CHAN_EX, rf_chan_ex);