AR_PHY_TURBO
phy = AR_READ(sc, AR_PHY_TURBO) & AR_PHY_FC_ENABLE_DAC_FIFO;
AR_WRITE(sc, AR_PHY_TURBO, phy);
AR_SETBITS(sc, AR_PHY_TURBO, AR_PHY_FC_DYN2040_EN);
AR_CLRBITS(sc, AR_PHY_TURBO, AR_PHY_FC_DYN2040_EN);
otus_write(sc, AR_PHY_TURBO, tmp);