1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas RZ/G2L ASoC Serial Sound Interface (SSIF-2) Driver
74 #define SSI_RATES		SNDRV_PCM_RATE_8000_48000 /* 8k-44.1kHz */
116 	 * The SSI supports full-duplex transmission and reception.
119 	 * So it is better to use as half-duplex (playing and recording
120 	 * should be done on separate channels).
123 	struct rz_ssi_stream capture;  member
139 	writel(data, (priv->base + reg));  in rz_ssi_reg_writel()
144 	return readl(priv->base + reg);  in rz_ssi_reg_readl()
152 	val = readl(priv->base + reg);  in rz_ssi_reg_mask_setl()
154 	writel(val, (priv->base + reg));  in rz_ssi_reg_mask_setl()
168 	return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;  in rz_ssi_stream_is_play()
174 	struct rz_ssi_stream *stream = &ssi->playback;  in rz_ssi_stream_get()
176 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)  in rz_ssi_stream_get()
177 		stream = &ssi->capture;  in rz_ssi_stream_get()
184 	return (ssi->playback.dma_ch && (ssi->dma_rt || ssi->capture.dma_ch));  in rz_ssi_is_dma_enabled()
190 	struct rz_ssi_priv *ssi = strm->priv;  in rz_ssi_set_substream()
193 	spin_lock_irqsave(&ssi->lock, flags);  in rz_ssi_set_substream()
194 	strm->substream = substream;  in rz_ssi_set_substream()
195 	spin_unlock_irqrestore(&ssi->lock, flags);  in rz_ssi_set_substream()
204 	spin_lock_irqsave(&ssi->lock, flags);  in rz_ssi_stream_is_valid()
205 	ret = strm->substream && strm->substream->runtime;  in rz_ssi_stream_is_valid()
206 	spin_unlock_irqrestore(&ssi->lock, flags);  in rz_ssi_stream_is_valid()
214 	struct snd_pcm_runtime *runtime = substream->runtime;  in rz_ssi_stream_init()
217 	strm->sample_width = samples_to_bytes(runtime, 1);  in rz_ssi_stream_init()
218 	strm->dma_buffer_pos = 0;  in rz_ssi_stream_init()
219 	strm->period_counter = 0;  in rz_ssi_stream_init()
220 	strm->buffer_pos = 0;  in rz_ssi_stream_init()
222 	strm->oerr_num = 0;  in rz_ssi_stream_init()
223 	strm->uerr_num = 0;  in rz_ssi_stream_init()
224 	strm->running = 0;  in rz_ssi_stream_init()
227 	strm->fifo_sample_size = SSI_FIFO_DEPTH;  in rz_ssi_stream_init()
233 	struct snd_soc_dai *dai = rz_ssi_get_dai(strm->substream);  in rz_ssi_stream_quit()
237 	if (strm->oerr_num > 0)  in rz_ssi_stream_quit()
238 		dev_info(dai->dev, "overrun = %d\n", strm->oerr_num);  in rz_ssi_stream_quit()
240 	if (strm->uerr_num > 0)  in rz_ssi_stream_quit()
241 		dev_info(dai->dev, "underrun = %d\n", strm->uerr_num);  in rz_ssi_stream_quit()
245 			    unsigned int channels)  in rz_ssi_clk_setup()  argument
248 			       6, 12, 24, 48, 96, -1, -1, -1 };  in rz_ssi_clk_setup()
250 	unsigned long bclk_rate = rate * channels * channel_bits;  in rz_ssi_clk_setup()
261 	if (ssi->audio_clk_1 && ssi->audio_clk_2) {  in rz_ssi_clk_setup()
262 		if (ssi->audio_clk_1 % bclk_rate)  in rz_ssi_clk_setup()
263 			ssi->audio_mck = ssi->audio_clk_2;  in rz_ssi_clk_setup()
265 			ssi->audio_mck = ssi->audio_clk_1;  in rz_ssi_clk_setup()
270 	if (ssi->audio_mck == ssi->audio_clk_1)  in rz_ssi_clk_setup()
272 	if (ssi->bckp_rise)  in rz_ssi_clk_setup()
274 	if (ssi->lrckp_fsync_fall)  in rz_ssi_clk_setup()
279 	div = ssi->audio_mck / bclk_rate;  in rz_ssi_clk_setup()
289 		dev_err(ssi->dev, "Rate not divisible by audio clock source\n");  in rz_ssi_clk_setup()
290 		return -EINVAL;  in rz_ssi_clk_setup()
308 	bool is_play = rz_ssi_stream_is_play(ssi, strm->substream);  in rz_ssi_start()
319 				  SSISCR_TDES(strm->fifo_sample_size / 2 - 1) |  in rz_ssi_start()
339 	strm->running = 1;  in rz_ssi_start()
350 	strm->running = 0;  in rz_ssi_stop()
357 		dmaengine_terminate_async(strm->dma_ch);  in rz_ssi_stop()
371 	while (--timeout) {  in rz_ssi_stop()
378 		dev_info(ssi->dev, "timeout waiting for SSI idle\n");  in rz_ssi_stop()
389 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_pointer_update()
393 	if (!strm->running || !substream || !substream->runtime)  in rz_ssi_pointer_update()
396 	runtime = substream->runtime;  in rz_ssi_pointer_update()
397 	strm->buffer_pos += frames;  in rz_ssi_pointer_update()
398 	WARN_ON(strm->buffer_pos > runtime->buffer_size);  in rz_ssi_pointer_update()
401 	if (strm->buffer_pos == runtime->buffer_size)  in rz_ssi_pointer_update()
402 		strm->buffer_pos = 0;  in rz_ssi_pointer_update()
404 	current_period = strm->buffer_pos / runtime->period_size;  in rz_ssi_pointer_update()
405 	if (strm->period_counter != current_period) {  in rz_ssi_pointer_update()
406 		snd_pcm_period_elapsed(strm->substream);  in rz_ssi_pointer_update()
407 		strm->period_counter = current_period;  in rz_ssi_pointer_update()
413 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_pio_recv()
422 		return -EINVAL;  in rz_ssi_pio_recv()
424 	runtime = substream->runtime;  in rz_ssi_pio_recv()
428 		frames_left = runtime->period_size -  in rz_ssi_pio_recv()
429 			      (strm->buffer_pos % runtime->period_size);  in rz_ssi_pio_recv()
431 			frames_left = runtime->period_size;  in rz_ssi_pio_recv()
439 		while (frames_left && (fifo_samples >= runtime->channels)) {  in rz_ssi_pio_recv()
440 			samples += runtime->channels;  in rz_ssi_pio_recv()
441 			fifo_samples -= runtime->channels;  in rz_ssi_pio_recv()
442 			frames_left--;  in rz_ssi_pio_recv()
450 		buf = (u16 *)runtime->dma_area;  in rz_ssi_pio_recv()
451 		buf += strm->buffer_pos * runtime->channels;  in rz_ssi_pio_recv()
453 		/* Note, only supports 16-bit samples */  in rz_ssi_pio_recv()
458 		rz_ssi_pointer_update(strm, samples / runtime->channels);  in rz_ssi_pio_recv()
459 	} while (!frames_left && fifo_samples >= runtime->channels);  in rz_ssi_pio_recv()
466 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_pio_send()
467 	struct snd_pcm_runtime *runtime = substream->runtime;  in rz_ssi_pio_send()
476 		return -EINVAL;  in rz_ssi_pio_send()
479 	frames_left = runtime->period_size - (strm->buffer_pos %  in rz_ssi_pio_send()
480 					      runtime->period_size);  in rz_ssi_pio_send()
482 		frames_left = runtime->period_size;  in rz_ssi_pio_send()
484 	sample_space = strm->fifo_sample_size;  in rz_ssi_pio_send()
486 	sample_space -= (ssifsr >> SSIFSR_TDC_SHIFT) & SSIFSR_TDC_MASK;  in rz_ssi_pio_send()
489 	while (frames_left && (sample_space >= runtime->channels)) {  in rz_ssi_pio_send()
490 		samples += runtime->channels;  in rz_ssi_pio_send()
491 		sample_space -= runtime->channels;  in rz_ssi_pio_send()
492 		frames_left--;  in rz_ssi_pio_send()
500 	buf = (u16 *)(runtime->dma_area);  in rz_ssi_pio_send()
501 	buf += strm->buffer_pos * runtime->channels;  in rz_ssi_pio_send()
503 	/* Note, only supports 16-bit samples */  in rz_ssi_pio_send()
508 	rz_ssi_pointer_update(strm, samples / runtime->channels);  in rz_ssi_pio_send()
519 	if (ssi->playback.substream)  in rz_ssi_interrupt()
520 		strm = &ssi->playback;  in rz_ssi_interrupt()
521 	else if (ssi->capture.substream)  in rz_ssi_interrupt()
522 		strm = &ssi->capture;  in rz_ssi_interrupt()
526 	if (irq == ssi->irq_int) { /* error or idle */  in rz_ssi_interrupt()
528 			strm->uerr_num++;  in rz_ssi_interrupt()
530 			strm->oerr_num++;  in rz_ssi_interrupt()
532 			strm->uerr_num++;  in rz_ssi_interrupt()
534 			strm->oerr_num++;  in rz_ssi_interrupt()
548 			strm->transfer(ssi, strm);  in rz_ssi_interrupt()
555 	if (!strm->running)  in rz_ssi_interrupt()
559 	if (irq == ssi->irq_tx)  in rz_ssi_interrupt()
560 		strm->transfer(ssi, &ssi->playback);  in rz_ssi_interrupt()
563 	if (irq == ssi->irq_rx) {  in rz_ssi_interrupt()
564 		strm->transfer(ssi, &ssi->capture);  in rz_ssi_interrupt()
579 	cfg.dst_addr = ssi->phys + SSIFTDR;  in rz_ssi_dma_slave_config()
580 	cfg.src_addr = ssi->phys + SSIFRDR;  in rz_ssi_dma_slave_config()
590 	struct snd_pcm_substream *substream = strm->substream;  in rz_ssi_dma_transfer()
598 		return -EINVAL;  in rz_ssi_dma_transfer()
600 	runtime = substream->runtime;  in rz_ssi_dma_transfer()
601 	if (runtime->state == SNDRV_PCM_STATE_DRAINING)  in rz_ssi_dma_transfer()
612 	amount = runtime->period_size;  in rz_ssi_dma_transfer()
615 	dma_paddr = runtime->dma_addr + frames_to_bytes(runtime,  in rz_ssi_dma_transfer()
616 							strm->dma_buffer_pos);  in rz_ssi_dma_transfer()
618 	desc = dmaengine_prep_slave_single(strm->dma_ch, dma_paddr, dma_size,  in rz_ssi_dma_transfer()
622 		dev_err(ssi->dev, "dmaengine_prep_slave_single() fail\n");  in rz_ssi_dma_transfer()
623 		return -ENOMEM;  in rz_ssi_dma_transfer()
626 	desc->callback = rz_ssi_dma_complete;  in rz_ssi_dma_transfer()
627 	desc->callback_param = strm;  in rz_ssi_dma_transfer()
630 		dev_err(ssi->dev, "dmaengine_submit() fail\n");  in rz_ssi_dma_transfer()
631 		return -EIO;  in rz_ssi_dma_transfer()
635 	strm->dma_buffer_pos += amount;  in rz_ssi_dma_transfer()
636 	if (strm->dma_buffer_pos >= runtime->buffer_size)  in rz_ssi_dma_transfer()
637 		strm->dma_buffer_pos = 0;  in rz_ssi_dma_transfer()
640 	dma_async_issue_pending(strm->dma_ch);  in rz_ssi_dma_transfer()
649 	if (!strm->running || !strm->substream || !strm->substream->runtime)  in rz_ssi_dma_complete()
653 	rz_ssi_pointer_update(strm, strm->substream->runtime->period_size);  in rz_ssi_dma_complete()
656 	rz_ssi_dma_transfer(strm->priv, strm);  in rz_ssi_dma_complete()
661 	if (ssi->playback.dma_ch) {  in rz_ssi_release_dma_channels()
662 		dma_release_channel(ssi->playback.dma_ch);  in rz_ssi_release_dma_channels()
663 		ssi->playback.dma_ch = NULL;  in rz_ssi_release_dma_channels()
664 		if (ssi->dma_rt)  in rz_ssi_release_dma_channels()
665 			ssi->dma_rt = false;  in rz_ssi_release_dma_channels()
668 	if (ssi->capture.dma_ch) {  in rz_ssi_release_dma_channels()
669 		dma_release_channel(ssi->capture.dma_ch);  in rz_ssi_release_dma_channels()
670 		ssi->capture.dma_ch = NULL;  in rz_ssi_release_dma_channels()
676 	ssi->playback.dma_ch = dma_request_chan(dev, "tx");  in rz_ssi_dma_request()
677 	if (IS_ERR(ssi->playback.dma_ch))  in rz_ssi_dma_request()
678 		ssi->playback.dma_ch = NULL;  in rz_ssi_dma_request()
680 	ssi->capture.dma_ch = dma_request_chan(dev, "rx");  in rz_ssi_dma_request()
681 	if (IS_ERR(ssi->capture.dma_ch))  in rz_ssi_dma_request()
682 		ssi->capture.dma_ch = NULL;  in rz_ssi_dma_request()
684 	if (!ssi->playback.dma_ch && !ssi->capture.dma_ch) {  in rz_ssi_dma_request()
685 		ssi->playback.dma_ch = dma_request_chan(dev, "rt");  in rz_ssi_dma_request()
686 		if (IS_ERR(ssi->playback.dma_ch)) {  in rz_ssi_dma_request()
687 			ssi->playback.dma_ch = NULL;  in rz_ssi_dma_request()
691 		ssi->dma_rt = true;  in rz_ssi_dma_request()
697 	if (ssi->playback.dma_ch &&  in rz_ssi_dma_request()
698 	    (rz_ssi_dma_slave_config(ssi, ssi->playback.dma_ch, true) < 0))  in rz_ssi_dma_request()
701 	if (ssi->capture.dma_ch &&  in rz_ssi_dma_request()
702 	    (rz_ssi_dma_slave_config(ssi, ssi->capture.dma_ch, false) < 0))  in rz_ssi_dma_request()
710 	return -ENODEV;  in rz_ssi_dma_request()
729 		if (ssi->dma_rt) {  in rz_ssi_dai_trigger()
733 			ret = rz_ssi_dma_slave_config(ssi, ssi->playback.dma_ch,  in rz_ssi_dai_trigger()
737 				ssi->playback.transfer = rz_ssi_pio_send;  in rz_ssi_dai_trigger()
738 				ssi->capture.transfer = rz_ssi_pio_recv;  in rz_ssi_dai_trigger()
748 			ret = strm->transfer(ssi, strm);  in rz_ssi_dai_trigger()
773 		dev_err(ssi->dev, "Codec should be clk and frame consumer\n");  in rz_ssi_dai_set_fmt()
774 		return -EINVAL;  in rz_ssi_dai_set_fmt()
785 		ssi->bckp_rise = false;  in rz_ssi_dai_set_fmt()
786 		ssi->lrckp_fsync_fall = false;  in rz_ssi_dai_set_fmt()
789 		ssi->bckp_rise = false;  in rz_ssi_dai_set_fmt()
790 		ssi->lrckp_fsync_fall = true;  in rz_ssi_dai_set_fmt()
793 		ssi->bckp_rise = true;  in rz_ssi_dai_set_fmt()
794 		ssi->lrckp_fsync_fall = false;  in rz_ssi_dai_set_fmt()
797 		ssi->bckp_rise = true;  in rz_ssi_dai_set_fmt()
798 		ssi->lrckp_fsync_fall = true;  in rz_ssi_dai_set_fmt()
801 		return -EINVAL;  in rz_ssi_dai_set_fmt()
809 		dev_err(ssi->dev, "Only I2S mode is supported.\n");  in rz_ssi_dai_set_fmt()
810 		return -EINVAL;  in rz_ssi_dai_set_fmt()
822 					SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;  in rz_ssi_dai_hw_params()
823 	unsigned int channels = params_channels(params);  in rz_ssi_dai_hw_params()  local
826 		dev_err(ssi->dev, "Unsupported sample width: %d\n",  in rz_ssi_dai_hw_params()
828 		return -EINVAL;  in rz_ssi_dai_hw_params()
831 	if (channels != 2) {  in rz_ssi_dai_hw_params()
832 		dev_err(ssi->dev, "Number of channels not matched: %d\n",  in rz_ssi_dai_hw_params()
833 			channels);  in rz_ssi_dai_hw_params()
834 		return -EINVAL;  in rz_ssi_dai_hw_params()
866 	return snd_pcm_hw_constraint_integer(substream->runtime,  in rz_ssi_pcm_open()
877 	return strm->buffer_pos;  in rz_ssi_pcm_pointer()
883 	snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,  in rz_ssi_pcm_new()
884 				       rtd->card->snd_card->dev,  in rz_ssi_pcm_new()
891 		.name			= "rz-ssi-dai",
898 		.capture = {
909 	.name			= "rz-ssi",
923 	ssi = devm_kzalloc(&pdev->dev, sizeof(*ssi), GFP_KERNEL);  in rz_ssi_probe()
925 		return -ENOMEM;  in rz_ssi_probe()
927 	ssi->pdev = pdev;  in rz_ssi_probe()
928 	ssi->dev = &pdev->dev;  in rz_ssi_probe()
929 	ssi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in rz_ssi_probe()
930 	if (IS_ERR(ssi->base))  in rz_ssi_probe()
931 		return PTR_ERR(ssi->base);  in rz_ssi_probe()
933 	ssi->phys = res->start;  in rz_ssi_probe()
934 	ssi->clk = devm_clk_get(&pdev->dev, "ssi");  in rz_ssi_probe()
935 	if (IS_ERR(ssi->clk))  in rz_ssi_probe()
936 		return PTR_ERR(ssi->clk);  in rz_ssi_probe()
938 	ssi->sfr_clk = devm_clk_get(&pdev->dev, "ssi_sfr");  in rz_ssi_probe()
939 	if (IS_ERR(ssi->sfr_clk))  in rz_ssi_probe()
940 		return PTR_ERR(ssi->sfr_clk);  in rz_ssi_probe()
942 	audio_clk = devm_clk_get(&pdev->dev, "audio_clk1");  in rz_ssi_probe()
944 		return dev_err_probe(&pdev->dev, PTR_ERR(audio_clk),  in rz_ssi_probe()
947 	ssi->audio_clk_1 = clk_get_rate(audio_clk);  in rz_ssi_probe()
948 	audio_clk = devm_clk_get(&pdev->dev, "audio_clk2");  in rz_ssi_probe()
950 		return dev_err_probe(&pdev->dev, PTR_ERR(audio_clk),  in rz_ssi_probe()
953 	ssi->audio_clk_2 = clk_get_rate(audio_clk);  in rz_ssi_probe()
954 	if (!(ssi->audio_clk_1 || ssi->audio_clk_2))  in rz_ssi_probe()
955 		return dev_err_probe(&pdev->dev, -EINVAL,  in rz_ssi_probe()
958 	ssi->audio_mck = ssi->audio_clk_1 ? ssi->audio_clk_1 : ssi->audio_clk_2;  in rz_ssi_probe()
961 	ret = rz_ssi_dma_request(ssi, &pdev->dev);  in rz_ssi_probe()
963 		dev_warn(&pdev->dev, "DMA not available, using PIO\n");  in rz_ssi_probe()
964 		ssi->playback.transfer = rz_ssi_pio_send;  in rz_ssi_probe()
965 		ssi->capture.transfer = rz_ssi_pio_recv;  in rz_ssi_probe()
967 		dev_info(&pdev->dev, "DMA enabled");  in rz_ssi_probe()
968 		ssi->playback.transfer = rz_ssi_dma_transfer;  in rz_ssi_probe()
969 		ssi->capture.transfer = rz_ssi_dma_transfer;  in rz_ssi_probe()
972 	ssi->playback.priv = ssi;  in rz_ssi_probe()
973 	ssi->capture.priv = ssi;  in rz_ssi_probe()
975 	spin_lock_init(&ssi->lock);  in rz_ssi_probe()
976 	dev_set_drvdata(&pdev->dev, ssi);  in rz_ssi_probe()
979 	ssi->irq_int = platform_get_irq_byname(pdev, "int_req");  in rz_ssi_probe()
980 	if (ssi->irq_int < 0) {  in rz_ssi_probe()
982 		return ssi->irq_int;  in rz_ssi_probe()
985 	ret = devm_request_irq(&pdev->dev, ssi->irq_int, &rz_ssi_interrupt,  in rz_ssi_probe()
986 			       0, dev_name(&pdev->dev), ssi);  in rz_ssi_probe()
989 		return dev_err_probe(&pdev->dev, ret,  in rz_ssi_probe()
995 		ssi->irq_tx = platform_get_irq_byname(pdev, "dma_tx");  in rz_ssi_probe()
996 		if (ssi->irq_tx < 0)  in rz_ssi_probe()
997 			return ssi->irq_tx;  in rz_ssi_probe()
999 		ret = devm_request_irq(&pdev->dev, ssi->irq_tx,  in rz_ssi_probe()
1001 				       dev_name(&pdev->dev), ssi);  in rz_ssi_probe()
1003 			return dev_err_probe(&pdev->dev, ret,  in rz_ssi_probe()
1006 		ssi->irq_rx = platform_get_irq_byname(pdev, "dma_rx");  in rz_ssi_probe()
1007 		if (ssi->irq_rx < 0)  in rz_ssi_probe()
1008 			return ssi->irq_rx;  in rz_ssi_probe()
1010 		ret = devm_request_irq(&pdev->dev, ssi->irq_rx,  in rz_ssi_probe()
1012 				       dev_name(&pdev->dev), ssi);  in rz_ssi_probe()
1014 			return dev_err_probe(&pdev->dev, ret,  in rz_ssi_probe()
1018 	ssi->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);  in rz_ssi_probe()
1019 	if (IS_ERR(ssi->rstc)) {  in rz_ssi_probe()
1020 		ret = PTR_ERR(ssi->rstc);  in rz_ssi_probe()
1024 	reset_control_deassert(ssi->rstc);  in rz_ssi_probe()
1025 	pm_runtime_enable(&pdev->dev);  in rz_ssi_probe()
1026 	ret = pm_runtime_resume_and_get(&pdev->dev);  in rz_ssi_probe()
1028 		dev_err(&pdev->dev, "pm_runtime_resume_and_get failed\n");  in rz_ssi_probe()
1032 	ret = devm_snd_soc_register_component(&pdev->dev, &rz_ssi_soc_component,  in rz_ssi_probe()
1036 		dev_err(&pdev->dev, "failed to register snd component\n");  in rz_ssi_probe()
1043 	pm_runtime_put(ssi->dev);  in rz_ssi_probe()
1045 	pm_runtime_disable(ssi->dev);  in rz_ssi_probe()
1046 	reset_control_assert(ssi->rstc);  in rz_ssi_probe()
1055 	struct rz_ssi_priv *ssi = dev_get_drvdata(&pdev->dev);  in rz_ssi_remove()
1059 	pm_runtime_put(ssi->dev);  in rz_ssi_remove()
1060 	pm_runtime_disable(ssi->dev);  in rz_ssi_remove()
1061 	reset_control_assert(ssi->rstc);  in rz_ssi_remove()
1067 	{ .compatible = "renesas,rz-ssi", },
1074 		.name	= "rz-ssi-pcm-audio",