RT2573_TXRX_CSR9
tmp = rum_read(sc, RT2573_TXRX_CSR9) & 0xff000000;
if (rum_write(sc, RT2573_TXRX_CSR9, tmp) != 0)
rum_modbits(sc, RT2573_TXRX_CSR9, RT2573_TSF_TIMER_EN |
rum_clrbits(sc, RT2573_TXRX_CSR9, 0x00ffffff);