ESA_CODEC_COMMAND
data = bus_space_read_1(iot, ioh, ESA_CODEC_COMMAND);
bus_space_write_1(iot, ioh, ESA_CODEC_COMMAND, (reg & 0x7f) | 0x80);
bus_space_write_1(iot, ioh, ESA_CODEC_COMMAND, reg & 0x7f);