R12A_CCK_CHECK
!(rtwn_read_1(sc, R12A_CCK_CHECK) & R12A_CCK_CHECK_5GHZ))
rtwn_write_1(sc, R12A_CCK_CHECK, 0);
rtwn_write_1(sc, R12A_CCK_CHECK, R12A_CCK_CHECK_5GHZ);
rtwn_write_1(sc, R12A_CCK_CHECK, 0);
rtwn_write_1(sc, R12A_CCK_CHECK, R12A_CCK_CHECK_5GHZ);