static int snd_stm_pcm_player_stop(struct snd_pcm_substream *substream)
{
struct snd_stm_pcm_player *pcm_player =
snd_pcm_substream_chip(substream);
snd_stm_printd(1, "snd_stm_pcm_player_stop(substream=0x%p)\n",
substream);
BUG_ON(!pcm_player);
BUG_ON(!snd_stm_magic_valid(pcm_player));
/* Mute & shutdown DAC */
if (pcm_player->conv_group) {
snd_stm_conv_mute(pcm_player->conv_group);
snd_stm_conv_disable(pcm_player->conv_group);
}
/* Disable interrupts */
set__AUD_PCMOUT_IT_EN_CLR__NSAMPLE__CLEAR(pcm_player);
set__AUD_PCMOUT_IT_EN_CLR__UNF__CLEAR(pcm_player);
disable_irq_nosync(pcm_player->irq);
/* Stop PCM player */
set__AUD_PCMOUT_CTRL__MODE__OFF(pcm_player);
/* Stop FDMA transfer */
dma_stop_channel(pcm_player->fdma_channel);
/* Stop the clock & reset PCM player */
clk_disable(pcm_player->clock);
set__AUD_PCMOUT_RST__SRSTP__RESET(pcm_player);
return 0;
}
void ksnd_pcm_streaming_stop(ksnd_pcm_streaming_t handle)
{
// Raise the flag
set_bit(FLAG_STOPPED, &handle->flags);
// Clean ALSA notifications
handle->capture_handle->substream->runtime->transfer_ack_end = NULL;
// Break transfer (if any)
dma_stop_channel(handle->fdma_channel);
dma_wait_for_completion(handle->fdma_channel);
// Free FDMA resources
dma_params_free(&handle->fdma_params);
free_dma(handle->fdma_channel);
// Free description memory
handle->magic = magic_bad;
kfree(handle);
}
