/* reclaim completed dma receive descriptors and packets */
static void
chiprxreclaim(struct bcm4xxx *ch)
{
ET_TRACE(("et%d: chiprxreclaim\n", ch->etc->unit));
dma_rxreclaim(ch->di);
ch->intstatus &= ~I_RI;
}
static int bcm947xx_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
bcm947xx_i2s_info_t *snd_bcm = rtd->dai->cpu_dai->private_data;
struct bcm947xx_runtime_data *brtd = substream->runtime->private_data;
DBG("%s %s\n", __FUNCTION__, bcm947xx_direction_str(substream));
DBG("%s: i2s intstatus 0x%x intmask 0x%x\n", __FUNCTION__,
R_REG(snd_bcm->osh, &snd_bcm->regs->intstatus),
R_REG(snd_bcm->osh, &snd_bcm->regs->intmask));
/* #if required because dma_dump is unavailable in non-debug builds. */
#if BCM947XX_DUMP_RING_BUFFER_ON_PCM_CLOSE_ON
{
/* dump dma rings to console */
#if !defined(FIFOERROR_DUMP_SIZE)
#define FIFOERROR_DUMP_SIZE 8192
#endif
char *tmp;
struct bcmstrbuf b;
if (snd_bcm->di[0] && (tmp = MALLOC(snd_bcm->osh, FIFOERROR_DUMP_SIZE))) {
bcm_binit(&b, tmp, FIFOERROR_DUMP_SIZE);
dma_dump(snd_bcm->di[0], &b, TRUE);
printbig(tmp);
MFREE(snd_bcm->osh, tmp, FIFOERROR_DUMP_SIZE);
}
}
#endif /* BCM947XX_DUMP_RING_BUFFER_ON_PCM_CLOSE_ON */
/* reclaim all descriptors */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
dma_rxreset(snd_bcm->di[0]);
dma_rxreclaim(snd_bcm->di[0]);
} else {
dma_txreset(snd_bcm->di[0]);
dma_txreclaim(snd_bcm->di[0], HNDDMA_RANGE_ALL);
}
if (brtd)
kfree(brtd);
else
DBG("%s: called with brtd == NULL\n", __FUNCTION__);
return 0;
}
/* Maybe called from snd_period_elapsed. */
static int bcm947xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
bcm947xx_i2s_info_t *snd_bcm = rtd->dai->cpu_dai->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct bcm947xx_runtime_data *brtd = runtime->private_data;
uint32 intmask = R_REG(snd_bcm->osh, &snd_bcm->regs->intmask);
int ret = 0;
DBG("%s %s w/cmd=%d\n", __FUNCTION__, bcm947xx_direction_str(substream), cmd);
spin_lock(&brtd->lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
brtd->bytes_pending = snd_pcm_lib_buffer_bytes(substream);
bcm947xx_pcm_enqueue(substream);
} else {
// dma_txresume(snd_bcm->di[0]);
}
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
// dma_txsuspend(snd_bcm->di[0]);
break;
}
/* fall-thru */
case SNDRV_PCM_TRIGGER_STOP:
/* Reset the disable interrupts, DMA RX/TX channel.
Might get here as a result of calling snd_pcm_period_elapsed.
*/
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
intmask &= ~intmask_capture;
W_REG(snd_bcm->osh, &snd_bcm->regs->intmask, intmask);
dma_rxreset(snd_bcm->di[0]);
dma_rxreclaim(snd_bcm->di[0]);
dma_rxinit(snd_bcm->di[0]);
} else {
/* Disable transmit interrupts. */
intmask &= ~intmask_playback;
W_REG(snd_bcm->osh, &snd_bcm->regs->intmask, intmask);
dma_txreset(snd_bcm->di[0]);
dma_txreclaim(snd_bcm->di[0], HNDDMA_RANGE_ALL);
dma_txinit(snd_bcm->di[0]);
if (BCM947XX_DMA_LOOPBACK_ENABLED)
dma_fifoloopbackenable(snd_bcm->di[0]);
// dma_txsuspend(snd_bcm->di[0]);
}
break;
default:
ret = -EINVAL;
}
spin_unlock(&brtd->lock);
DBG("%s: i2s intstatus 0x%x intmask 0x%x\n", __FUNCTION__,
R_REG(snd_bcm->osh, &snd_bcm->regs->intstatus),
R_REG(snd_bcm->osh, &snd_bcm->regs->intmask));
return ret;
}