97 	int (*transfer)(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm);
188 static void rz_ssi_set_substream(struct rz_ssi_stream *strm,  in rz_ssi_set_substream()  argument
191 	struct rz_ssi_priv *ssi = strm->priv;  in rz_ssi_set_substream()
195 	strm->substream = substream;  in rz_ssi_set_substream()
200 				   struct rz_ssi_stream *strm)  in rz_ssi_stream_is_valid()  argument
206 	ret = strm->substream && strm->substream->runtime;  in rz_ssi_stream_is_valid()
212 static void rz_ssi_stream_init(struct rz_ssi_stream *strm,  in rz_ssi_stream_init()  argument
217 	rz_ssi_set_substream(strm, substream);  in rz_ssi_stream_init()
218 	strm->sample_width = samples_to_bytes(runtime, 1);  in rz_ssi_stream_init()
219 	strm->dma_buffer_pos = 0;  in rz_ssi_stream_init()
220 	strm->period_counter = 0;  in rz_ssi_stream_init()
221 	strm->buffer_pos = 0;  in rz_ssi_stream_init()
223 	strm->oerr_num = 0;  in rz_ssi_stream_init()
224 	strm->uerr_num = 0;  in rz_ssi_stream_init()
225 	strm->running = 0;  in rz_ssi_stream_init()
228 	strm->fifo_sample_size = SSI_FIFO_DEPTH;  in rz_ssi_stream_init()
232 			       struct rz_ssi_stream *strm)  in rz_ssi_stream_quit()  argument
234 	struct snd_soc_dai *dai = rz_ssi_get_dai(strm->substream);  in rz_ssi_stream_quit()
236 	rz_ssi_set_substream(strm, NULL);  in rz_ssi_stream_quit()
238 	if (strm->oerr_num > 0)  in rz_ssi_stream_quit()
239 		dev_info(dai->dev, "overrun = %d\n", strm->oerr_num);  in rz_ssi_stream_quit()
241 	if (strm->uerr_num > 0)  in rz_ssi_stream_quit()
242 		dev_info(dai->dev, "underrun = %d\n", strm->uerr_num);  in rz_ssi_stream_quit()
307 static int rz_ssi_start(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)  in rz_ssi_start()  argument
309 	bool is_play = rz_ssi_stream_is_play(ssi, strm->substream);  in rz_ssi_start()
320 				  SSISCR_TDES(strm->fifo_sample_size / 2 - 1) |  in rz_ssi_start()
340 	strm->running = 1;  in rz_ssi_start()
347 static int rz_ssi_stop(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)  in rz_ssi_stop()  argument
351 	strm->running = 0;  in rz_ssi_stop()
358 		dmaengine_terminate_async(strm->dma_ch);  in rz_ssi_stop()
388 static void rz_ssi_pointer_update(struct rz_ssi_stream *strm, int frames)  in rz_ssi_pointer_update()  argument
390 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_pointer_update()
394 	if (!strm->running || !substream || !substream->runtime)  in rz_ssi_pointer_update()
398 	strm->buffer_pos += frames;  in rz_ssi_pointer_update()
399 	WARN_ON(strm->buffer_pos > runtime->buffer_size);  in rz_ssi_pointer_update()
402 	if (strm->buffer_pos == runtime->buffer_size)  in rz_ssi_pointer_update()
403 		strm->buffer_pos = 0;  in rz_ssi_pointer_update()
405 	current_period = strm->buffer_pos / runtime->period_size;  in rz_ssi_pointer_update()
406 	if (strm->period_counter != current_period) {  in rz_ssi_pointer_update()
407 		snd_pcm_period_elapsed(strm->substream);  in rz_ssi_pointer_update()
408 		strm->period_counter = current_period;  in rz_ssi_pointer_update()
412 static int rz_ssi_pio_recv(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)  in rz_ssi_pio_recv()  argument
414 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_pio_recv()
422 	if (!rz_ssi_stream_is_valid(ssi, strm))  in rz_ssi_pio_recv()
430 			      (strm->buffer_pos % runtime->period_size);  in rz_ssi_pio_recv()
452 		buf += strm->buffer_pos * runtime->channels;  in rz_ssi_pio_recv()
459 		rz_ssi_pointer_update(strm, samples / runtime->channels);  in rz_ssi_pio_recv()
465 static int rz_ssi_pio_send(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)  in rz_ssi_pio_send()  argument
467 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_pio_send()
476 	if (!rz_ssi_stream_is_valid(ssi, strm))  in rz_ssi_pio_send()
480 	frames_left = runtime->period_size - (strm->buffer_pos %  in rz_ssi_pio_send()
485 	sample_space = strm->fifo_sample_size;  in rz_ssi_pio_send()
502 	buf += strm->buffer_pos * runtime->channels;  in rz_ssi_pio_send()
509 	rz_ssi_pointer_update(strm, samples / runtime->channels);  in rz_ssi_pio_send()
516 	struct rz_ssi_stream *strm = NULL;  in rz_ssi_interrupt()  local
521 		strm = &ssi->playback;  in rz_ssi_interrupt()
523 		strm = &ssi->capture;  in rz_ssi_interrupt()
529 			strm->uerr_num++;  in rz_ssi_interrupt()
531 			strm->oerr_num++;  in rz_ssi_interrupt()
533 			strm->uerr_num++;  in rz_ssi_interrupt()
535 			strm->oerr_num++;  in rz_ssi_interrupt()
541 			rz_ssi_stop(ssi, strm);  in rz_ssi_interrupt()
549 			strm->transfer(ssi, strm);  in rz_ssi_interrupt()
552 			rz_ssi_start(ssi, strm);  in rz_ssi_interrupt()
556 	if (!strm->running)  in rz_ssi_interrupt()
561 		strm->transfer(ssi, &ssi->playback);  in rz_ssi_interrupt()
565 		strm->transfer(ssi, &ssi->capture);  in rz_ssi_interrupt()
570 		struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_interrupt()
573 			strm->transfer(ssi, &ssi->playback);  in rz_ssi_interrupt()
575 			strm->transfer(ssi, &ssi->capture);  in rz_ssi_interrupt()
600 			       struct rz_ssi_stream *strm)  in rz_ssi_dma_transfer()  argument
602 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_dma_transfer()
609 	if (!rz_ssi_stream_is_valid(ssi, strm))  in rz_ssi_dma_transfer()
628 							strm->dma_buffer_pos);  in rz_ssi_dma_transfer()
630 	desc = dmaengine_prep_slave_single(strm->dma_ch, dma_paddr, dma_size,  in rz_ssi_dma_transfer()
639 	desc->callback_param = strm;  in rz_ssi_dma_transfer()
647 	strm->dma_buffer_pos += amount;  in rz_ssi_dma_transfer()
648 	if (strm->dma_buffer_pos >= runtime->buffer_size)  in rz_ssi_dma_transfer()
649 		strm->dma_buffer_pos = 0;  in rz_ssi_dma_transfer()
652 	dma_async_issue_pending(strm->dma_ch);  in rz_ssi_dma_transfer()
659 	struct rz_ssi_stream *strm = (struct rz_ssi_stream *)data;  in rz_ssi_dma_complete()  local
661 	if (!strm->running || !strm->substream || !strm->substream->runtime)  in rz_ssi_dma_complete()
665 	rz_ssi_pointer_update(strm, strm->substream->runtime->period_size);  in rz_ssi_dma_complete()
668 	rz_ssi_dma_transfer(strm->priv, strm);  in rz_ssi_dma_complete()
729 	struct rz_ssi_stream *strm = rz_ssi_stream_get(ssi, substream);  in rz_ssi_dai_trigger()  local
739 		rz_ssi_stream_init(strm, substream);  in rz_ssi_dai_trigger()
760 			ret = strm->transfer(ssi, strm);  in rz_ssi_dai_trigger()
765 		ret = rz_ssi_start(ssi, strm);  in rz_ssi_dai_trigger()
768 		rz_ssi_stop(ssi, strm);  in rz_ssi_dai_trigger()
769 		rz_ssi_stream_quit(ssi, strm);  in rz_ssi_dai_trigger()
887 	struct rz_ssi_stream *strm = rz_ssi_stream_get(ssi, substream);  in rz_ssi_pcm_pointer()  local
889 	return strm->buffer_pos;  in rz_ssi_pcm_pointer()