R92C_RRSR
reg = rtwn_read_4(sc, R92C_RRSR);
rtwn_write_4(sc, R92C_RRSR, reg);
reg = rtwn_read_1(sc, R92C_RRSR + 2);
rtwn_write_1(sc, R92C_RRSR + 2, reg);
reg = rtwn_read_4(sc, R92C_RRSR);
rtwn_write_4(sc, R92C_RRSR, reg);
reg = rtwn_read_4(sc, R92C_RRSR);
rtwn_write_4(sc, R92C_RRSR, reg);