[linux-2.6-block.git] / sound / firewire / tascam / tascam-pcm.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * tascam-pcm.c - a part of driver for TASCAM FireWire series
 *
 * Copyright (c) 2015 Takashi Sakamoto
 */

#include "tascam.h"

static int pcm_init_hw_params(struct snd_tscm *tscm,
			      struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_pcm_hardware *hw = &runtime->hw;
	struct amdtp_stream *stream;
	unsigned int pcm_channels;

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
		stream = &tscm->tx_stream;
		pcm_channels = tscm->spec->pcm_capture_analog_channels;
	} else {
		runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
		stream = &tscm->rx_stream;
		pcm_channels = tscm->spec->pcm_playback_analog_channels;
	}

	if (tscm->spec->has_adat)
		pcm_channels += 8;
	if (tscm->spec->has_spdif)
		pcm_channels += 2;
	runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;

	hw->rates = SNDRV_PCM_RATE_44100 |
		    SNDRV_PCM_RATE_48000 |
		    SNDRV_PCM_RATE_88200 |
		    SNDRV_PCM_RATE_96000;
	snd_pcm_limit_hw_rates(runtime);

	return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
}

static int pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;
	enum snd_tscm_clock clock;
	unsigned int rate;
	int err;

	err = snd_tscm_stream_lock_try(tscm);
	if (err < 0)
		goto end;

	err = pcm_init_hw_params(tscm, substream);
	if (err < 0)
		goto err_locked;

	err = snd_tscm_stream_get_clock(tscm, &clock);
	if (err < 0)
		goto err_locked;

	if (clock != SND_TSCM_CLOCK_INTERNAL ||
	    amdtp_stream_pcm_running(&tscm->rx_stream) ||
	    amdtp_stream_pcm_running(&tscm->tx_stream)) {
		err = snd_tscm_stream_get_rate(tscm, &rate);
		if (err < 0)
			goto err_locked;
		substream->runtime->hw.rate_min = rate;
		substream->runtime->hw.rate_max = rate;
	}

	snd_pcm_set_sync(substream);
end:
	return err;
err_locked:
	snd_tscm_stream_lock_release(tscm);
	return err;
}

static int pcm_close(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;

	snd_tscm_stream_lock_release(tscm);

	return 0;
}

static int pcm_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *hw_params)
{
	struct snd_tscm *tscm = substream->private_data;
	int err;

	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
					       params_buffer_bytes(hw_params));
	if (err < 0)
		return err;

	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
		unsigned int rate = params_rate(hw_params);
		unsigned int frames_per_period = params_period_size(hw_params);

		mutex_lock(&tscm->mutex);
		err = snd_tscm_stream_reserve_duplex(tscm, rate,
						     frames_per_period);
		if (err >= 0)
			++tscm->substreams_counter;
		mutex_unlock(&tscm->mutex);
	}

	return err;
}

static int pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;

	mutex_lock(&tscm->mutex);

	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
		--tscm->substreams_counter;

	snd_tscm_stream_stop_duplex(tscm);

	mutex_unlock(&tscm->mutex);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int pcm_capture_prepare(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	mutex_lock(&tscm->mutex);

	err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
	if (err >= 0)
		amdtp_stream_pcm_prepare(&tscm->tx_stream);

	mutex_unlock(&tscm->mutex);

	return err;
}

static int pcm_playback_prepare(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	mutex_lock(&tscm->mutex);

	err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
	if (err >= 0)
		amdtp_stream_pcm_prepare(&tscm->rx_stream);

	mutex_unlock(&tscm->mutex);

	return err;
}

static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_tscm *tscm = substream->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_tscm *tscm = substream->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
{
	struct snd_tscm *tscm = sbstrm->private_data;

	return amdtp_stream_pcm_pointer(&tscm->tx_stream);
}

static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
{
	struct snd_tscm *tscm = sbstrm->private_data;

	return amdtp_stream_pcm_pointer(&tscm->rx_stream);
}

static int pcm_capture_ack(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;

	return amdtp_stream_pcm_ack(&tscm->tx_stream);
}

static int pcm_playback_ack(struct snd_pcm_substream *substream)
{
	struct snd_tscm *tscm = substream->private_data;

	return amdtp_stream_pcm_ack(&tscm->rx_stream);
}

int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
{
	static const struct snd_pcm_ops capture_ops = {
		.open		= pcm_open,
		.close		= pcm_close,
		.ioctl		= snd_pcm_lib_ioctl,
		.hw_params	= pcm_hw_params,
		.hw_free	= pcm_hw_free,
		.prepare	= pcm_capture_prepare,
		.trigger	= pcm_capture_trigger,
		.pointer	= pcm_capture_pointer,
		.ack		= pcm_capture_ack,
		.page		= snd_pcm_lib_get_vmalloc_page,
	};
	static const struct snd_pcm_ops playback_ops = {
		.open		= pcm_open,
		.close		= pcm_close,
		.ioctl		= snd_pcm_lib_ioctl,
		.hw_params	= pcm_hw_params,
		.hw_free	= pcm_hw_free,
		.prepare	= pcm_playback_prepare,
		.trigger	= pcm_playback_trigger,
		.pointer	= pcm_playback_pointer,
		.ack		= pcm_playback_ack,
		.page		= snd_pcm_lib_get_vmalloc_page,
	};
	struct snd_pcm *pcm;
	int err;

	err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
	if (err < 0)
		return err;

	pcm->private_data = tscm;
	snprintf(pcm->name, sizeof(pcm->name),
		 "%s PCM", tscm->card->shortname);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);

	return 0;
}
Commit	Line	Data
da607e19	1	// SPDX-License-Identifier: GPL-2.0-only
e453df44 TS	2	/*
	3	* tascam-pcm.c - a part of driver for TASCAM FireWire series
	4	*
	5	* Copyright (c) 2015 Takashi Sakamoto
e453df44 TS	6	*/
	7
	8	#include "tascam.h"
	9
e453df44 TS	10	static int pcm_init_hw_params(struct snd_tscm *tscm,
	11	struct snd_pcm_substream *substream)
	12	{
e453df44	13	struct snd_pcm_runtime *runtime = substream->runtime;
55799c5a	14	struct snd_pcm_hardware *hw = &runtime->hw;
e453df44 TS	15	struct amdtp_stream *stream;
	16	unsigned int pcm_channels;
	17
e453df44 TS	18	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
	19	runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
	20	stream = &tscm->tx_stream;
	21	pcm_channels = tscm->spec->pcm_capture_analog_channels;
	22	} else {
a02cb8f8	23	runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
e453df44 TS	24	stream = &tscm->rx_stream;
	25	pcm_channels = tscm->spec->pcm_playback_analog_channels;
	26	}
	27
	28	if (tscm->spec->has_adat)
	29	pcm_channels += 8;
	30	if (tscm->spec->has_spdif)
	31	pcm_channels += 2;
	32	runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
	33
55799c5a TS	34	hw->rates = SNDRV_PCM_RATE_44100 \|
	35	SNDRV_PCM_RATE_48000 \|
	36	SNDRV_PCM_RATE_88200 \|
	37	SNDRV_PCM_RATE_96000;
	38	snd_pcm_limit_hw_rates(runtime);
e453df44 TS	39
	40	return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
	41	}
	42
	43	static int pcm_open(struct snd_pcm_substream *substream)
	44	{
	45	struct snd_tscm *tscm = substream->private_data;
	46	enum snd_tscm_clock clock;
	47	unsigned int rate;
	48	int err;
	49
e5e0c3dd TS	50	err = snd_tscm_stream_lock_try(tscm);
	51	if (err < 0)
	52	goto end;
	53
e453df44 TS	54	err = pcm_init_hw_params(tscm, substream);
e453df44 TS	55	if (err < 0)
e5e0c3dd	56	goto err_locked;
e453df44 TS	57
e453df44 TS	58	err = snd_tscm_stream_get_clock(tscm, &clock);
2617120f TS	59	if (err < 0)
	60	goto err_locked;
	61
e453df44 TS	62	if (clock != SND_TSCM_CLOCK_INTERNAL \|\|
	63	amdtp_stream_pcm_running(&tscm->rx_stream) \|\|
	64	amdtp_stream_pcm_running(&tscm->tx_stream)) {
	65	err = snd_tscm_stream_get_rate(tscm, &rate);
	66	if (err < 0)
e5e0c3dd	67	goto err_locked;
e453df44 TS	68	substream->runtime->hw.rate_min = rate;
	69	substream->runtime->hw.rate_max = rate;
	70	}
	71
	72	snd_pcm_set_sync(substream);
e5e0c3dd TS	73	end:
	74	return err;
	75	err_locked:
	76	snd_tscm_stream_lock_release(tscm);
e453df44 TS	77	return err;
	78	}
	79
	80	static int pcm_close(struct snd_pcm_substream *substream)
	81	{
e5e0c3dd TS	82	struct snd_tscm *tscm = substream->private_data;
	83
	84	snd_tscm_stream_lock_release(tscm);
	85
e453df44 TS	86	return 0;
	87	}
	88
d8f291b7 TS	89	static int pcm_hw_params(struct snd_pcm_substream *substream,
d8f291b7 TS	90	struct snd_pcm_hw_params *hw_params)
e453df44 TS	91	{
	92	struct snd_tscm *tscm = substream->private_data;
	93	int err;
	94
	95	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	96	params_buffer_bytes(hw_params));
	97	if (err < 0)
	98	return err;
	99
	100	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
07b26642	101	unsigned int rate = params_rate(hw_params);
262542ed	102	unsigned int frames_per_period = params_period_size(hw_params);
07b26642	103
e453df44	104	mutex_lock(&tscm->mutex);
262542ed TS	105	err = snd_tscm_stream_reserve_duplex(tscm, rate,
262542ed TS	106	frames_per_period);
07b26642 TS	107	if (err >= 0)
07b26642 TS	108	++tscm->substreams_counter;
e453df44 TS	109	mutex_unlock(&tscm->mutex);
	110	}
	111
07b26642	112	return err;
e453df44 TS	113	}
e453df44 TS	114
d8f291b7	115	static int pcm_hw_free(struct snd_pcm_substream *substream)
e453df44 TS	116	{
	117	struct snd_tscm *tscm = substream->private_data;
	118
	119	mutex_lock(&tscm->mutex);
	120
	121	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
07b26642	122	--tscm->substreams_counter;
e453df44 TS	123
	124	snd_tscm_stream_stop_duplex(tscm);
	125
	126	mutex_unlock(&tscm->mutex);
	127
	128	return snd_pcm_lib_free_vmalloc_buffer(substream);
	129	}
	130
	131	static int pcm_capture_prepare(struct snd_pcm_substream *substream)
	132	{
	133	struct snd_tscm *tscm = substream->private_data;
	134	struct snd_pcm_runtime *runtime = substream->runtime;
	135	int err;
	136
	137	mutex_lock(&tscm->mutex);
	138
	139	err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
	140	if (err >= 0)
	141	amdtp_stream_pcm_prepare(&tscm->tx_stream);
	142
	143	mutex_unlock(&tscm->mutex);
	144
	145	return err;
	146	}
	147
	148	static int pcm_playback_prepare(struct snd_pcm_substream *substream)
	149	{
	150	struct snd_tscm *tscm = substream->private_data;
	151	struct snd_pcm_runtime *runtime = substream->runtime;
	152	int err;
	153
	154	mutex_lock(&tscm->mutex);
	155
	156	err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
	157	if (err >= 0)
	158	amdtp_stream_pcm_prepare(&tscm->rx_stream);
	159
	160	mutex_unlock(&tscm->mutex);
	161
	162	return err;
	163	}
	164
	165	static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
	166	{
	167	struct snd_tscm *tscm = substream->private_data;
	168
	169	switch (cmd) {
	170	case SNDRV_PCM_TRIGGER_START:
	171	amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
	172	break;
	173	case SNDRV_PCM_TRIGGER_STOP:
	174	amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
	175	break;
	176	default:
	177	return -EINVAL;
	178	}
	179
	180	return 0;
	181	}
	182
	183	static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
	184	{
	185	struct snd_tscm *tscm = substream->private_data;
	186
187	switch (cmd) {
188	case SNDRV_PCM_TRIGGER_START:
189	amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
190	break;
191	case SNDRV_PCM_TRIGGER_STOP:
192	amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
193	break;
194	default:
195	return -EINVAL;
196	}
197
198	return 0;
199	}
200
201	static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
202	{
203	struct snd_tscm *tscm = sbstrm->private_data;
204
205	return amdtp_stream_pcm_pointer(&tscm->tx_stream);
206	}
207
208	static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
209	{
210	struct snd_tscm *tscm = sbstrm->private_data;
211
212	return amdtp_stream_pcm_pointer(&tscm->rx_stream);
213	}
214
875becf8 TS	215	static int pcm_capture_ack(struct snd_pcm_substream *substream)
	216	{
	217	struct snd_tscm *tscm = substream->private_data;
	218
	219	return amdtp_stream_pcm_ack(&tscm->tx_stream);
	220	}
	221
	222	static int pcm_playback_ack(struct snd_pcm_substream *substream)
	223	{
	224	struct snd_tscm *tscm = substream->private_data;
	225
	226	return amdtp_stream_pcm_ack(&tscm->rx_stream);
	227	}
	228
e453df44 TS	229	int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
e453df44 TS	230	{
92128236 TS	231	static const struct snd_pcm_ops capture_ops = {
	232	.open = pcm_open,
	233	.close = pcm_close,
	234	.ioctl = snd_pcm_lib_ioctl,
d8f291b7 TS	235	.hw_params = pcm_hw_params,
d8f291b7 TS	236	.hw_free = pcm_hw_free,
92128236 TS	237	.prepare = pcm_capture_prepare,
	238	.trigger = pcm_capture_trigger,
	239	.pointer = pcm_capture_pointer,
875becf8	240	.ack = pcm_capture_ack,
92128236 TS	241	.page = snd_pcm_lib_get_vmalloc_page,
	242	};
	243	static const struct snd_pcm_ops playback_ops = {
	244	.open = pcm_open,
	245	.close = pcm_close,
	246	.ioctl = snd_pcm_lib_ioctl,
d8f291b7 TS	247	.hw_params = pcm_hw_params,
d8f291b7 TS	248	.hw_free = pcm_hw_free,
92128236 TS	249	.prepare = pcm_playback_prepare,
	250	.trigger = pcm_playback_trigger,
	251	.pointer = pcm_playback_pointer,
875becf8	252	.ack = pcm_playback_ack,
92128236	253	.page = snd_pcm_lib_get_vmalloc_page,
92128236	254	};
e453df44 TS	255	struct snd_pcm *pcm;
	256	int err;
	257
	258	err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
	259	if (err < 0)
	260	return err;
	261
	262	pcm->private_data = tscm;
	263	snprintf(pcm->name, sizeof(pcm->name),
	264	"%s PCM", tscm->card->shortname);
92128236 TS	265	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
92128236 TS	266	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
e453df44 TS	267
	268	return 0;
	269	}