AR_PHY_EXT_CCA
reg = AR_READ(sc, AR_PHY_EXT_CCA(i));
reg = AR_READ(sc, AR_PHY_EXT_CCA(i));
AR_WRITE(sc, AR_PHY_EXT_CCA(i), reg);
reg = AR_READ(sc, AR_PHY_EXT_CCA(0));
AR_WRITE(sc, AR_PHY_EXT_CCA(0), reg);
reg = AR_READ(sc, AR_PHY_EXT_CCA(i));
reg = AR_READ(sc, AR_PHY_EXT_CCA(i));
AR_WRITE(sc, AR_PHY_EXT_CCA(i), reg);