RT2661_TXRX_CSR9
tmp = RT2661_READ(sc, RT2661_TXRX_CSR9) & 0xff000000;
RT2661_WRITE(sc, RT2661_TXRX_CSR9, tmp);
tmp = RT2661_READ(sc, RT2661_TXRX_CSR9);
RT2661_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0x00ffffff);