/* Start DMA -
* Do the initial set of work to initialize all the channels as required.
* We shall then initate a transfer
*/
static int omap_start_sound_dma(audio_stream_t * s, dma_addr_t dma_ptr,
u_int dma_size)
{
int ret = -EPERM;
FN_IN;
if (unlikely(dma_size > MAX_DMA_SIZE)) {
ERR("DmaSoundDma: Start: overflowed %d-%d\n", dma_size,
MAX_DMA_SIZE);
return -EOVERFLOW;
}
if (AUDIO_QUEUE_FULL(s)) {
ret = -2;
goto sound_out;
}
if (s->input_or_output == FMODE_WRITE)
/*playback */
{
ret =
audio_set_dma_params_play(s->lch[s->dma_q_tail], dma_ptr,
dma_size);
} else {
ret =
audio_set_dma_params_capture(s->lch[s->dma_q_tail], dma_ptr,
dma_size);
}
if (ret != 0) {
ret = -2; /* indicate queue full */
goto sound_out;
}
AUDIO_INCREMENT_TAIL(s);
ret = audio_start_dma_chain(s);
if (ret) {
ERR("dma start failed");
}
sound_out:
FN_OUT(ret);
return ret;
}
/*
* Start DMA -
* Do the initial set of work to initialize all the channels as required.
* We shall then initate a transfer
*/
int omap_start_alsa_sound_dma(struct audio_stream *s,
dma_addr_t dma_ptr,
u_int dma_size)
{
int ret = -EPERM;
FN_IN;
if (unlikely(dma_size > MAX_DMA_SIZE)) {
ERR("DmaSoundDma: Start: overflowed %d-%d\n", dma_size,
MAX_DMA_SIZE);
return -EOVERFLOW;
}
if (s->stream_id == SNDRV_PCM_STREAM_PLAYBACK) {
/* playback */
ret =
audio_set_dma_params_play(s->lch[s->dma_q_tail],
dma_ptr, dma_size);
} else {
ret =
audio_set_dma_params_capture(s->lch[s->dma_q_tail],
dma_ptr, dma_size);
}
if (ret != 0) {
ret = -3; /* indicate queue full */
goto sound_out;
}
AUDIO_INCREMENT_TAIL(s);
ret = audio_start_dma_chain(s);
if (ret)
ERR("dma start failed");
sound_out:
FN_OUT(ret);
return ret;
}