[linux-2.6-block.git] / sound / firewire / bebob / bebob_pcm.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * bebob_pcm.c - a part of driver for BeBoB based devices
 *
 * Copyright (c) 2013-2014 Takashi Sakamoto
 */

#include "./bebob.h"

static int
hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
{
	struct snd_bebob_stream_formation *formations = rule->private;
	struct snd_interval *r =
		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
	const struct snd_interval *c =
		hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	struct snd_interval t = {
		.min = UINT_MAX, .max = 0, .integer = 1
	};
	unsigned int i;

	for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) {
		/* entry is invalid */
		if (formations[i].pcm == 0)
			continue;

		if (!snd_interval_test(c, formations[i].pcm))
			continue;

		t.min = min(t.min, snd_bebob_rate_table[i]);
		t.max = max(t.max, snd_bebob_rate_table[i]);

	}
	return snd_interval_refine(r, &t);
}

static int
hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
{
	struct snd_bebob_stream_formation *formations = rule->private;
	struct snd_interval *c =
		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	const struct snd_interval *r =
		hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval t = {
		.min = UINT_MAX, .max = 0, .integer = 1
	};

	unsigned int i;

	for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) {
		/* entry is invalid */
		if (formations[i].pcm == 0)
			continue;

		if (!snd_interval_test(r, snd_bebob_rate_table[i]))
			continue;

		t.min = min(t.min, formations[i].pcm);
		t.max = max(t.max, formations[i].pcm);
	}

	return snd_interval_refine(c, &t);
}

static void
limit_channels_and_rates(struct snd_pcm_hardware *hw,
			 struct snd_bebob_stream_formation *formations)
{
	unsigned int i;

	hw->channels_min = UINT_MAX;
	hw->channels_max = 0;

	hw->rate_min = UINT_MAX;
	hw->rate_max = 0;
	hw->rates = 0;

	for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) {
		/* entry has no PCM channels */
		if (formations[i].pcm == 0)
			continue;

		hw->channels_min = min(hw->channels_min, formations[i].pcm);
		hw->channels_max = max(hw->channels_max, formations[i].pcm);

		hw->rate_min = min(hw->rate_min, snd_bebob_rate_table[i]);
		hw->rate_max = max(hw->rate_max, snd_bebob_rate_table[i]);
		hw->rates |= snd_pcm_rate_to_rate_bit(snd_bebob_rate_table[i]);
	}
}

static int
pcm_init_hw_params(struct snd_bebob *bebob,
		   struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct amdtp_stream *s;
	struct snd_bebob_stream_formation *formations;
	int err;

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
		s = &bebob->tx_stream;
		formations = bebob->tx_stream_formations;
	} else {
		runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
		s = &bebob->rx_stream;
		formations = bebob->rx_stream_formations;
	}

	limit_channels_and_rates(&runtime->hw, formations);

	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
				  hw_rule_channels, formations,
				  SNDRV_PCM_HW_PARAM_RATE, -1);
	if (err < 0)
		goto end;

	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				  hw_rule_rate, formations,
				  SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	if (err < 0)
		goto end;

	err = amdtp_am824_add_pcm_hw_constraints(s, runtime);
end:
	return err;
}

static int pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;
	const struct snd_bebob_rate_spec *spec = bebob->spec->rate;
	struct amdtp_domain *d = &bebob->domain;
	enum snd_bebob_clock_type src;
	int err;

	err = snd_bebob_stream_lock_try(bebob);
	if (err < 0)
		return err;

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

	err = snd_bebob_stream_get_clock_src(bebob, &src);
	if (err < 0)
		goto err_locked;

	mutex_lock(&bebob->mutex);

	// When source of clock is not internal or any stream is reserved for
	// transmission of PCM frames, the available sampling rate is limited
	// at current one.
	if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL ||
	    (bebob->substreams_counter > 0 && d->events_per_period > 0)) {
		unsigned int frames_per_period = d->events_per_period;
		unsigned int frames_per_buffer = d->events_per_buffer;
		unsigned int sampling_rate;

		err = spec->get(bebob, &sampling_rate);
		if (err < 0) {
			mutex_unlock(&bebob->mutex);
			dev_err(&bebob->unit->device,
				"fail to get sampling rate: %d\n", err);
			goto err_locked;
		}

		substream->runtime->hw.rate_min = sampling_rate;
		substream->runtime->hw.rate_max = sampling_rate;

		if (frames_per_period > 0) {
			err = snd_pcm_hw_constraint_minmax(substream->runtime,
					SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
					frames_per_period, frames_per_period);
			if (err < 0) {
				mutex_unlock(&bebob->mutex);
				goto err_locked;
			}

			err = snd_pcm_hw_constraint_minmax(substream->runtime,
					SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
					frames_per_buffer, frames_per_buffer);
			if (err < 0) {
				mutex_unlock(&bebob->mutex);
				goto err_locked;
			}
		}
	}

	mutex_unlock(&bebob->mutex);

	snd_pcm_set_sync(substream);

	return 0;
err_locked:
	snd_bebob_stream_lock_release(bebob);
	return err;
}

static int
pcm_close(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;
	snd_bebob_stream_lock_release(bebob);
	return 0;
}

static int pcm_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *hw_params)
{
	struct snd_bebob *bebob = 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);
		unsigned int frames_per_buffer = params_buffer_size(hw_params);

		mutex_lock(&bebob->mutex);
		err = snd_bebob_stream_reserve_duplex(bebob, rate,
					frames_per_period, frames_per_buffer);
		if (err >= 0)
			++bebob->substreams_counter;
		mutex_unlock(&bebob->mutex);
	}

	return err;
}

static int pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;

	mutex_lock(&bebob->mutex);

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

	snd_bebob_stream_stop_duplex(bebob);

	mutex_unlock(&bebob->mutex);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int
pcm_capture_prepare(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;
	int err;

	err = snd_bebob_stream_start_duplex(bebob);
	if (err >= 0)
		amdtp_stream_pcm_prepare(&bebob->tx_stream);

	return err;
}
static int
pcm_playback_prepare(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;
	int err;

	err = snd_bebob_stream_start_duplex(bebob);
	if (err >= 0)
		amdtp_stream_pcm_prepare(&bebob->rx_stream);

	return err;
}

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

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

	return 0;
}
static int
pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_bebob *bebob = substream->private_data;

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

	return 0;
}

static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
{
	struct snd_bebob *bebob = sbstrm->private_data;

	return amdtp_domain_stream_pcm_pointer(&bebob->domain,
					       &bebob->tx_stream);
}
static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
{
	struct snd_bebob *bebob = sbstrm->private_data;

	return amdtp_domain_stream_pcm_pointer(&bebob->domain,
					       &bebob->rx_stream);
}

static int pcm_capture_ack(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;

	return amdtp_domain_stream_pcm_ack(&bebob->domain, &bebob->tx_stream);
}

static int pcm_playback_ack(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;

	return amdtp_domain_stream_pcm_ack(&bebob->domain, &bebob->rx_stream);
}

int snd_bebob_create_pcm_devices(struct snd_bebob *bebob)
{
	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(bebob->card, bebob->card->driver, 0, 1, 1, &pcm);
	if (err < 0)
		goto end;

	pcm->private_data = bebob;
	snprintf(pcm->name, sizeof(pcm->name),
		 "%s PCM", bebob->card->shortname);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
end:
	return err;
}
Commit	Line	Data
da607e19	1	// SPDX-License-Identifier: GPL-2.0-only
fbbebd2c TS	2	/*
	3	* bebob_pcm.c - a part of driver for BeBoB based devices
	4	*
	5	* Copyright (c) 2013-2014 Takashi Sakamoto
fbbebd2c TS	6	*/
	7
	8	#include "./bebob.h"
	9
	10	static int
	11	hw_rule_rate(struct snd_pcm_hw_params params, struct snd_pcm_hw_rule rule)
	12	{
	13	struct snd_bebob_stream_formation *formations = rule->private;
	14	struct snd_interval *r =
	15	hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
	16	const struct snd_interval *c =
	17	hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	18	struct snd_interval t = {
	19	.min = UINT_MAX, .max = 0, .integer = 1
	20	};
	21	unsigned int i;
	22
	23	for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) {
	24	/* entry is invalid */
	25	if (formations[i].pcm == 0)
	26	continue;
	27
	28	if (!snd_interval_test(c, formations[i].pcm))
	29	continue;
	30
	31	t.min = min(t.min, snd_bebob_rate_table[i]);
	32	t.max = max(t.max, snd_bebob_rate_table[i]);
	33
	34	}
	35	return snd_interval_refine(r, &t);
	36	}
	37
	38	static int
	39	hw_rule_channels(struct snd_pcm_hw_params params, struct snd_pcm_hw_rule rule)
	40	{
	41	struct snd_bebob_stream_formation *formations = rule->private;
	42	struct snd_interval *c =
	43	hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	44	const struct snd_interval *r =
	45	hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
	46	struct snd_interval t = {
	47	.min = UINT_MAX, .max = 0, .integer = 1
	48	};
	49
	50	unsigned int i;
	51
	52	for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) {
	53	/* entry is invalid */
	54	if (formations[i].pcm == 0)
	55	continue;
	56
	57	if (!snd_interval_test(r, snd_bebob_rate_table[i]))
	58	continue;
	59
	60	t.min = min(t.min, formations[i].pcm);
	61	t.max = max(t.max, formations[i].pcm);
	62	}
	63
	64	return snd_interval_refine(c, &t);
	65	}
	66
	67	static void
	68	limit_channels_and_rates(struct snd_pcm_hardware *hw,
	69	struct snd_bebob_stream_formation *formations)
70	{
71	unsigned int i;
72
73	hw->channels_min = UINT_MAX;
74	hw->channels_max = 0;
75
76	hw->rate_min = UINT_MAX;
77	hw->rate_max = 0;
78	hw->rates = 0;
79
80	for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) {
81	/* entry has no PCM channels */
82	if (formations[i].pcm == 0)
83	continue;
84
85	hw->channels_min = min(hw->channels_min, formations[i].pcm);
86	hw->channels_max = max(hw->channels_max, formations[i].pcm);
87
88	hw->rate_min = min(hw->rate_min, snd_bebob_rate_table[i]);
89	hw->rate_max = max(hw->rate_max, snd_bebob_rate_table[i]);
90	hw->rates \|= snd_pcm_rate_to_rate_bit(snd_bebob_rate_table[i]);
91	}
92	}
93
fbbebd2c TS	94	static int
	95	pcm_init_hw_params(struct snd_bebob *bebob,
	96	struct snd_pcm_substream *substream)
	97	{
	98	struct snd_pcm_runtime *runtime = substream->runtime;
	99	struct amdtp_stream *s;
	100	struct snd_bebob_stream_formation *formations;
	101	int err;
	102
fbbebd2c	103	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
49c7b3fc	104	runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
fbbebd2c TS	105	s = &bebob->tx_stream;
	106	formations = bebob->tx_stream_formations;
	107	} else {
49c7b3fc	108	runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
fbbebd2c TS	109	s = &bebob->rx_stream;
	110	formations = bebob->rx_stream_formations;
	111	}
	112
	113	limit_channels_and_rates(&runtime->hw, formations);
fbbebd2c TS	114
	115	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
	116	hw_rule_channels, formations,
	117	SNDRV_PCM_HW_PARAM_RATE, -1);
	118	if (err < 0)
	119	goto end;
	120
	121	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
	122	hw_rule_rate, formations,
	123	SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	124	if (err < 0)
	125	goto end;
	126
bc8500da	127	err = amdtp_am824_add_pcm_hw_constraints(s, runtime);
fbbebd2c TS	128	end:
	129	return err;
	130	}
	131
a80b29a4	132	static int pcm_open(struct snd_pcm_substream *substream)
fbbebd2c TS	133	{
fbbebd2c TS	134	struct snd_bebob *bebob = substream->private_data;
6b9866c8	135	const struct snd_bebob_rate_spec *spec = bebob->spec->rate;
a80b29a4	136	struct amdtp_domain *d = &bebob->domain;
3e254b16	137	enum snd_bebob_clock_type src;
fbbebd2c TS	138	int err;
fbbebd2c TS	139
618eabea	140	err = snd_bebob_stream_lock_try(bebob);
fbbebd2c	141	if (err < 0)
a80b29a4	142	return err;
fbbebd2c	143
618eabea TS	144	err = pcm_init_hw_params(bebob, substream);
	145	if (err < 0)
	146	goto err_locked;
	147
3e254b16	148	err = snd_bebob_stream_get_clock_src(bebob, &src);
fbbebd2c	149	if (err < 0)
618eabea	150	goto err_locked;
fbbebd2c	151
a80b29a4 TS	152	mutex_lock(&bebob->mutex);
	153
	154	// When source of clock is not internal or any stream is reserved for
	155	// transmission of PCM frames, the available sampling rate is limited
	156	// at current one.
3e254b16	157	if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL \|\|
a80b29a4 TS	158	(bebob->substreams_counter > 0 && d->events_per_period > 0)) {
a80b29a4 TS	159	unsigned int frames_per_period = d->events_per_period;
1fde7a44	160	unsigned int frames_per_buffer = d->events_per_buffer;
a80b29a4 TS	161	unsigned int sampling_rate;
a80b29a4 TS	162
1fc9522a	163	err = spec->get(bebob, &sampling_rate);
fbbebd2c	164	if (err < 0) {
a80b29a4	165	mutex_unlock(&bebob->mutex);
fbbebd2c TS	166	dev_err(&bebob->unit->device,
fbbebd2c TS	167	"fail to get sampling rate: %d\n", err);
618eabea	168	goto err_locked;
fbbebd2c TS	169	}
	170
	171	substream->runtime->hw.rate_min = sampling_rate;
	172	substream->runtime->hw.rate_max = sampling_rate;
a80b29a4 TS	173
	174	if (frames_per_period > 0) {
	175	err = snd_pcm_hw_constraint_minmax(substream->runtime,
	176	SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
	177	frames_per_period, frames_per_period);
	178	if (err < 0) {
	179	mutex_unlock(&bebob->mutex);
	180	goto err_locked;
	181	}
1fde7a44 TS	182
	183	err = snd_pcm_hw_constraint_minmax(substream->runtime,
	184	SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
	185	frames_per_buffer, frames_per_buffer);
	186	if (err < 0) {
	187	mutex_unlock(&bebob->mutex);
	188	goto err_locked;
	189	}
a80b29a4	190	}
fbbebd2c TS	191	}
fbbebd2c TS	192
a80b29a4 TS	193	mutex_unlock(&bebob->mutex);
a80b29a4 TS	194
fbbebd2c	195	snd_pcm_set_sync(substream);
a80b29a4 TS	196
a80b29a4 TS	197	return 0;
618eabea TS	198	err_locked:
	199	snd_bebob_stream_lock_release(bebob);
	200	return err;
fbbebd2c TS	201	}
	202
	203	static int
	204	pcm_close(struct snd_pcm_substream *substream)
	205	{
618eabea TS	206	struct snd_bebob *bebob = substream->private_data;
618eabea TS	207	snd_bebob_stream_lock_release(bebob);
fbbebd2c TS	208	return 0;
	209	}
	210
f69fc179 TS	211	static int pcm_hw_params(struct snd_pcm_substream *substream,
f69fc179 TS	212	struct snd_pcm_hw_params *hw_params)
fbbebd2c TS	213	{
fbbebd2c TS	214	struct snd_bebob *bebob = substream->private_data;
22c103cd TS	215	int err;
	216
	217	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	218	params_buffer_bytes(hw_params));
	219	if (err < 0)
	220	return err;
fbbebd2c	221
2a71e701	222	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
ac2888b9	223	unsigned int rate = params_rate(hw_params);
8737209f	224	unsigned int frames_per_period = params_period_size(hw_params);
1fde7a44	225	unsigned int frames_per_buffer = params_buffer_size(hw_params);
ac2888b9	226
2a71e701	227	mutex_lock(&bebob->mutex);
8737209f	228	err = snd_bebob_stream_reserve_duplex(bebob, rate,
1fde7a44	229	frames_per_period, frames_per_buffer);
ac2888b9 TS	230	if (err >= 0)
ac2888b9 TS	231	++bebob->substreams_counter;
2a71e701 TS	232	mutex_unlock(&bebob->mutex);
2a71e701 TS	233	}
85130cb4	234
ac2888b9	235	return err;
fbbebd2c TS	236	}
fbbebd2c TS	237
f69fc179	238	static int pcm_hw_free(struct snd_pcm_substream *substream)
fbbebd2c TS	239	{
	240	struct snd_bebob *bebob = substream->private_data;
	241
5e818ac2 TS	242	mutex_lock(&bebob->mutex);
	243
	244	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
4fd6c6c7	245	bebob->substreams_counter--;
fbbebd2c TS	246
	247	snd_bebob_stream_stop_duplex(bebob);
	248
5e818ac2 TS	249	mutex_unlock(&bebob->mutex);
5e818ac2 TS	250
fbbebd2c TS	251	return snd_pcm_lib_free_vmalloc_buffer(substream);
	252	}
	253
	254	static int
	255	pcm_capture_prepare(struct snd_pcm_substream *substream)
	256	{
	257	struct snd_bebob *bebob = substream->private_data;
fbbebd2c TS	258	int err;
fbbebd2c TS	259
ac2888b9	260	err = snd_bebob_stream_start_duplex(bebob);
fbbebd2c TS	261	if (err >= 0)
	262	amdtp_stream_pcm_prepare(&bebob->tx_stream);
	263
	264	return err;
	265	}
	266	static int
	267	pcm_playback_prepare(struct snd_pcm_substream *substream)
	268	{
	269	struct snd_bebob *bebob = substream->private_data;
fbbebd2c TS	270	int err;
fbbebd2c TS	271
ac2888b9	272	err = snd_bebob_stream_start_duplex(bebob);
fbbebd2c TS	273	if (err >= 0)
	274	amdtp_stream_pcm_prepare(&bebob->rx_stream);
	275
	276	return err;
	277	}
	278
	279	static int
	280	pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
	281	{
	282	struct snd_bebob *bebob = substream->private_data;
	283
	284	switch (cmd) {
	285	case SNDRV_PCM_TRIGGER_START:
	286	amdtp_stream_pcm_trigger(&bebob->tx_stream, substream);
	287	break;
	288	case SNDRV_PCM_TRIGGER_STOP:
	289	amdtp_stream_pcm_trigger(&bebob->tx_stream, NULL);
	290	break;
	291	default:
	292	return -EINVAL;
	293	}
	294
	295	return 0;
	296	}
	297	static int
	298	pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
	299	{
	300	struct snd_bebob *bebob = substream->private_data;
	301
	302	switch (cmd) {
	303	case SNDRV_PCM_TRIGGER_START:
	304	amdtp_stream_pcm_trigger(&bebob->rx_stream, substream);
	305	break;
	306	case SNDRV_PCM_TRIGGER_STOP:
	307	amdtp_stream_pcm_trigger(&bebob->rx_stream, NULL);
	308	break;
	309	default:
	310	return -EINVAL;
	311	}
	312
	313	return 0;
	314	}
	315
f890f9a0	316	static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
fbbebd2c TS	317	{
fbbebd2c TS	318	struct snd_bebob *bebob = sbstrm->private_data;
f890f9a0 TS	319
	320	return amdtp_domain_stream_pcm_pointer(&bebob->domain,
	321	&bebob->tx_stream);
fbbebd2c	322	}
f890f9a0	323	static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
fbbebd2c TS	324	{
fbbebd2c TS	325	struct snd_bebob *bebob = sbstrm->private_data;
f890f9a0 TS	326
	327	return amdtp_domain_stream_pcm_pointer(&bebob->domain,
	328	&bebob->rx_stream);
fbbebd2c TS	329	}
fbbebd2c TS	330
875becf8 TS	331	static int pcm_capture_ack(struct snd_pcm_substream *substream)
	332	{
	333	struct snd_bebob *bebob = substream->private_data;
	334
e6dcc92f	335	return amdtp_domain_stream_pcm_ack(&bebob->domain, &bebob->tx_stream);
875becf8 TS	336	}
	337
	338	static int pcm_playback_ack(struct snd_pcm_substream *substream)
	339	{
	340	struct snd_bebob *bebob = substream->private_data;
	341
e6dcc92f	342	return amdtp_domain_stream_pcm_ack(&bebob->domain, &bebob->rx_stream);
875becf8 TS	343	}
875becf8 TS	344
fbbebd2c TS	345	int snd_bebob_create_pcm_devices(struct snd_bebob *bebob)
fbbebd2c TS	346	{
4780f774 TS	347	static const struct snd_pcm_ops capture_ops = {
	348	.open = pcm_open,
	349	.close = pcm_close,
	350	.ioctl = snd_pcm_lib_ioctl,
f69fc179 TS	351	.hw_params = pcm_hw_params,
f69fc179 TS	352	.hw_free = pcm_hw_free,
4780f774 TS	353	.prepare = pcm_capture_prepare,
	354	.trigger = pcm_capture_trigger,
	355	.pointer = pcm_capture_pointer,
875becf8	356	.ack = pcm_capture_ack,
4780f774 TS	357	.page = snd_pcm_lib_get_vmalloc_page,
	358	};
	359	static const struct snd_pcm_ops playback_ops = {
	360	.open = pcm_open,
	361	.close = pcm_close,
	362	.ioctl = snd_pcm_lib_ioctl,
f69fc179 TS	363	.hw_params = pcm_hw_params,
f69fc179 TS	364	.hw_free = pcm_hw_free,
4780f774 TS	365	.prepare = pcm_playback_prepare,
	366	.trigger = pcm_playback_trigger,
	367	.pointer = pcm_playback_pointer,
875becf8	368	.ack = pcm_playback_ack,
4780f774	369	.page = snd_pcm_lib_get_vmalloc_page,
4780f774	370	};
fbbebd2c TS	371	struct snd_pcm *pcm;
	372	int err;
	373
	374	err = snd_pcm_new(bebob->card, bebob->card->driver, 0, 1, 1, &pcm);
	375	if (err < 0)
	376	goto end;
	377
	378	pcm->private_data = bebob;
	379	snprintf(pcm->name, sizeof(pcm->name),
	380	"%s PCM", bebob->card->shortname);
4780f774 TS	381	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
4780f774 TS	382	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
fbbebd2c TS	383	end:
	384	return err;
	385	}