AR_TIMER_MODE
REG_SET_BIT(ah, AR_TIMER_MODE, flags);
REG_SET_BIT(ah, AR_TIMER_MODE,
REG_SET_BIT(ah, AR_TIMER_MODE, AR_QUIET_TIMER_EN);
REG_CLR_BIT(ah, AR_TIMER_MODE, AR_QUIET_TIMER_EN);