static int snd_stm_pcm_player_hw_free(struct snd_pcm_substream *substream)
{
struct snd_stm_pcm_player *pcm_player =
snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
snd_stm_printd(1, "snd_stm_pcm_player_hw_free(substream=0x%p)\n",
substream);
BUG_ON(!pcm_player);
BUG_ON(!snd_stm_magic_valid(pcm_player));
BUG_ON(!runtime);
/* This callback may be called more than once... */
if (snd_stm_buffer_is_allocated(pcm_player->buffer)) {
/* Let the FDMA stop */
dma_wait_for_completion(pcm_player->fdma_channel);
/* Free buffer */
snd_stm_buffer_free(pcm_player->buffer);
/* Free FDMA parameters & configuration */
dma_params_free(&pcm_player->fdma_params);
dma_req_free(pcm_player->fdma_channel,
pcm_player->fdma_request);
}
return 0;
}
static void exit_fdma_nand(struct stm_nand_emi *data)
{
int i;
if (data->dma_chan < 0)
return;
/* Release DMA channel */
free_dma(data->dma_chan);
/* Free DMA paramters (if they have actually been allocated) */
for (i = 0; i < 2; i++) {
if (data->dma_params[i].params_ops)
dma_params_free(&data->dma_params[i]);
}
}
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);
}