GBAUDIO_CODEC_PREPARE
if (module_state < GBAUDIO_CODEC_PREPARE) {
data->state[SNDRV_PCM_STREAM_PLAYBACK] = GBAUDIO_CODEC_PREPARE;
if (module_state < GBAUDIO_CODEC_PREPARE) {
data->state[SNDRV_PCM_STREAM_CAPTURE] = GBAUDIO_CODEC_PREPARE;
params->state = GBAUDIO_CODEC_PREPARE;