[mirror_ubuntu-jammy-kernel.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;
	unsigned int sampling_rate;
	enum snd_bebob_clock_type src;
	int err;

	err = snd_bebob_stream_lock_try(bebob);
	if (err < 0)
		goto end;

	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;

	/*
	 * When source of clock is internal or any PCM stream are running,
	 * the available sampling rate is limited at current sampling rate.
	 */
	if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL ||
	    amdtp_stream_pcm_running(&bebob->tx_stream) ||
	    amdtp_stream_pcm_running(&bebob->rx_stream)) {
		err = spec->get(bebob, &sampling_rate);
		if (err < 0) {
			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;
	}

	snd_pcm_set_sync(substream);
end:
	return err;
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_capture_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) {
		mutex_lock(&bebob->mutex);
		bebob->substreams_counter++;
		mutex_unlock(&bebob->mutex);
	}

	return 0;
}
static int
pcm_playback_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) {
		mutex_lock(&bebob->mutex);
		bebob->substreams_counter++;
		mutex_unlock(&bebob->mutex);
	}

	return 0;
}

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

	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
		mutex_lock(&bebob->mutex);
		bebob->substreams_counter--;
		mutex_unlock(&bebob->mutex);
	}

	snd_bebob_stream_stop_duplex(bebob);

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

	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
		mutex_lock(&bebob->mutex);
		bebob->substreams_counter--;
		mutex_unlock(&bebob->mutex);
	}

	snd_bebob_stream_stop_duplex(bebob);

	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;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	err = snd_bebob_stream_start_duplex(bebob, runtime->rate);
	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;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	err = snd_bebob_stream_start_duplex(bebob, runtime->rate);
	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_stream_pcm_pointer(&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_stream_pcm_pointer(&bebob->rx_stream);
}

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

	return amdtp_stream_pcm_ack(&bebob->tx_stream);
}

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

	return amdtp_stream_pcm_ack(&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_capture_hw_params,
		.hw_free	= pcm_capture_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_playback_hw_params,
		.hw_free	= pcm_playback_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
	132	static int
	133	pcm_open(struct snd_pcm_substream *substream)
	134	{
	135	struct snd_bebob *bebob = substream->private_data;
6b9866c8	136	const struct snd_bebob_rate_spec *spec = bebob->spec->rate;
fbbebd2c	137	unsigned int sampling_rate;
3e254b16	138	enum snd_bebob_clock_type src;
fbbebd2c TS	139	int err;
fbbebd2c TS	140
618eabea	141	err = snd_bebob_stream_lock_try(bebob);
fbbebd2c TS	142	if (err < 0)
	143	goto end;
	144
618eabea TS	145	err = pcm_init_hw_params(bebob, substream);
	146	if (err < 0)
	147	goto err_locked;
	148
3e254b16	149	err = snd_bebob_stream_get_clock_src(bebob, &src);
fbbebd2c	150	if (err < 0)
618eabea	151	goto err_locked;
fbbebd2c TS	152
	153	/*
	154	* When source of clock is internal or any PCM stream are running,
	155	* the available sampling rate is limited at current sampling rate.
	156	*/
3e254b16	157	if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL \|\|
fbbebd2c TS	158	amdtp_stream_pcm_running(&bebob->tx_stream) \|\|
fbbebd2c TS	159	amdtp_stream_pcm_running(&bebob->rx_stream)) {
1fc9522a	160	err = spec->get(bebob, &sampling_rate);
fbbebd2c TS	161	if (err < 0) {
	162	dev_err(&bebob->unit->device,
	163	"fail to get sampling rate: %d\n", err);
618eabea	164	goto err_locked;
fbbebd2c TS	165	}
	166
	167	substream->runtime->hw.rate_min = sampling_rate;
	168	substream->runtime->hw.rate_max = sampling_rate;
	169	}
	170
	171	snd_pcm_set_sync(substream);
fbbebd2c TS	172	end:
fbbebd2c TS	173	return err;
618eabea TS	174	err_locked:
	175	snd_bebob_stream_lock_release(bebob);
	176	return err;
fbbebd2c TS	177	}
	178
	179	static int
	180	pcm_close(struct snd_pcm_substream *substream)
	181	{
618eabea TS	182	struct snd_bebob *bebob = substream->private_data;
618eabea TS	183	snd_bebob_stream_lock_release(bebob);
fbbebd2c TS	184	return 0;
	185	}
	186
	187	static int
	188	pcm_capture_hw_params(struct snd_pcm_substream *substream,
	189	struct snd_pcm_hw_params *hw_params)
	190	{
	191	struct snd_bebob *bebob = substream->private_data;
22c103cd TS	192	int err;
	193
	194	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	195	params_buffer_bytes(hw_params));
	196	if (err < 0)
	197	return err;
fbbebd2c	198
2a71e701 TS	199	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2a71e701 TS	200	mutex_lock(&bebob->mutex);
4fd6c6c7	201	bebob->substreams_counter++;
2a71e701 TS	202	mutex_unlock(&bebob->mutex);
2a71e701 TS	203	}
85130cb4	204
22c103cd	205	return 0;
fbbebd2c TS	206	}
	207	static int
	208	pcm_playback_hw_params(struct snd_pcm_substream *substream,
	209	struct snd_pcm_hw_params *hw_params)
	210	{
	211	struct snd_bebob *bebob = substream->private_data;
22c103cd TS	212	int err;
	213
	214	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	215	params_buffer_bytes(hw_params));
	216	if (err < 0)
	217	return err;
fbbebd2c	218
2a71e701 TS	219	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2a71e701 TS	220	mutex_lock(&bebob->mutex);
4fd6c6c7	221	bebob->substreams_counter++;
2a71e701 TS	222	mutex_unlock(&bebob->mutex);
2a71e701 TS	223	}
85130cb4	224
22c103cd	225	return 0;
fbbebd2c TS	226	}
	227
	228	static int
	229	pcm_capture_hw_free(struct snd_pcm_substream *substream)
	230	{
	231	struct snd_bebob *bebob = substream->private_data;
	232
2a71e701 TS	233	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
2a71e701 TS	234	mutex_lock(&bebob->mutex);
4fd6c6c7	235	bebob->substreams_counter--;
2a71e701 TS	236	mutex_unlock(&bebob->mutex);
2a71e701 TS	237	}
fbbebd2c TS	238
	239	snd_bebob_stream_stop_duplex(bebob);
	240
	241	return snd_pcm_lib_free_vmalloc_buffer(substream);
	242	}
	243	static int
	244	pcm_playback_hw_free(struct snd_pcm_substream *substream)
	245	{
	246	struct snd_bebob *bebob = substream->private_data;
	247
2a71e701 TS	248	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
2a71e701 TS	249	mutex_lock(&bebob->mutex);
4fd6c6c7	250	bebob->substreams_counter--;
2a71e701 TS	251	mutex_unlock(&bebob->mutex);
2a71e701 TS	252	}
fbbebd2c TS	253
	254	snd_bebob_stream_stop_duplex(bebob);
	255
	256	return snd_pcm_lib_free_vmalloc_buffer(substream);
	257	}
	258
	259	static int
	260	pcm_capture_prepare(struct snd_pcm_substream *substream)
	261	{
	262	struct snd_bebob *bebob = substream->private_data;
	263	struct snd_pcm_runtime *runtime = substream->runtime;
	264	int err;
	265
	266	err = snd_bebob_stream_start_duplex(bebob, runtime->rate);
	267	if (err >= 0)
	268	amdtp_stream_pcm_prepare(&bebob->tx_stream);
	269
	270	return err;
	271	}
	272	static int
	273	pcm_playback_prepare(struct snd_pcm_substream *substream)
	274	{
	275	struct snd_bebob *bebob = substream->private_data;
	276	struct snd_pcm_runtime *runtime = substream->runtime;
	277	int err;
	278
	279	err = snd_bebob_stream_start_duplex(bebob, runtime->rate);
	280	if (err >= 0)
	281	amdtp_stream_pcm_prepare(&bebob->rx_stream);
	282
	283	return err;
	284	}
	285
	286	static int
	287	pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
	288	{
	289	struct snd_bebob *bebob = substream->private_data;
	290
	291	switch (cmd) {
	292	case SNDRV_PCM_TRIGGER_START:
	293	amdtp_stream_pcm_trigger(&bebob->tx_stream, substream);
	294	break;
	295	case SNDRV_PCM_TRIGGER_STOP:
	296	amdtp_stream_pcm_trigger(&bebob->tx_stream, NULL);
	297	break;
	298	default:
	299	return -EINVAL;
	300	}
	301
	302	return 0;
	303	}
	304	static int
	305	pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
	306	{
	307	struct snd_bebob *bebob = substream->private_data;
	308
	309	switch (cmd) {
	310	case SNDRV_PCM_TRIGGER_START:
	311	amdtp_stream_pcm_trigger(&bebob->rx_stream, substream);
	312	break;
	313	case SNDRV_PCM_TRIGGER_STOP:
	314	amdtp_stream_pcm_trigger(&bebob->rx_stream, NULL);
	315	break;
	316	default:
317	return -EINVAL;
318	}
319
320	return 0;
321	}
322
323	static snd_pcm_uframes_t
324	pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
325	{
326	struct snd_bebob *bebob = sbstrm->private_data;
327	return amdtp_stream_pcm_pointer(&bebob->tx_stream);
328	}
329	static snd_pcm_uframes_t
330	pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
331	{
332	struct snd_bebob *bebob = sbstrm->private_data;
333	return amdtp_stream_pcm_pointer(&bebob->rx_stream);
334	}
335
875becf8 TS	336	static int pcm_capture_ack(struct snd_pcm_substream *substream)
	337	{
	338	struct snd_bebob *bebob = substream->private_data;
	339
	340	return amdtp_stream_pcm_ack(&bebob->tx_stream);
	341	}
	342
	343	static int pcm_playback_ack(struct snd_pcm_substream *substream)
	344	{
	345	struct snd_bebob *bebob = substream->private_data;
	346
	347	return amdtp_stream_pcm_ack(&bebob->rx_stream);
	348	}
	349
fbbebd2c TS	350	int snd_bebob_create_pcm_devices(struct snd_bebob *bebob)
fbbebd2c TS	351	{
4780f774 TS	352	static const struct snd_pcm_ops capture_ops = {
	353	.open = pcm_open,
	354	.close = pcm_close,
	355	.ioctl = snd_pcm_lib_ioctl,
	356	.hw_params = pcm_capture_hw_params,
	357	.hw_free = pcm_capture_hw_free,
	358	.prepare = pcm_capture_prepare,
	359	.trigger = pcm_capture_trigger,
	360	.pointer = pcm_capture_pointer,
875becf8	361	.ack = pcm_capture_ack,
4780f774 TS	362	.page = snd_pcm_lib_get_vmalloc_page,
	363	};
	364	static const struct snd_pcm_ops playback_ops = {
	365	.open = pcm_open,
	366	.close = pcm_close,
	367	.ioctl = snd_pcm_lib_ioctl,
	368	.hw_params = pcm_playback_hw_params,
	369	.hw_free = pcm_playback_hw_free,
	370	.prepare = pcm_playback_prepare,
	371	.trigger = pcm_playback_trigger,
	372	.pointer = pcm_playback_pointer,
875becf8	373	.ack = pcm_playback_ack,
4780f774	374	.page = snd_pcm_lib_get_vmalloc_page,
4780f774	375	};
fbbebd2c TS	376	struct snd_pcm *pcm;
	377	int err;
	378
	379	err = snd_pcm_new(bebob->card, bebob->card->driver, 0, 1, 1, &pcm);
	380	if (err < 0)
	381	goto end;
	382
	383	pcm->private_data = bebob;
	384	snprintf(pcm->name, sizeof(pcm->name),
	385	"%s PCM", bebob->card->shortname);
4780f774 TS	386	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
4780f774 TS	387	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
fbbebd2c TS	388	end:
	389	return err;
	390	}