示例#1
0
文件: ua101.c 项目: 454053205/linux
static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream,
			 unsigned int channels)
{
	int err;

	substream->runtime->hw.info =
		SNDRV_PCM_INFO_MMAP |
		SNDRV_PCM_INFO_MMAP_VALID |
		SNDRV_PCM_INFO_BATCH |
		SNDRV_PCM_INFO_INTERLEAVED |
		SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_FIFO_IN_FRAMES;
	substream->runtime->hw.formats = ua->format_bit;
	substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate);
	substream->runtime->hw.rate_min = ua->rate;
	substream->runtime->hw.rate_max = ua->rate;
	substream->runtime->hw.channels_min = channels;
	substream->runtime->hw.channels_max = channels;
	substream->runtime->hw.buffer_bytes_max = 45000 * 1024;
	substream->runtime->hw.period_bytes_min = 1;
	substream->runtime->hw.period_bytes_max = UINT_MAX;
	substream->runtime->hw.periods_min = 2;
	substream->runtime->hw.periods_max = UINT_MAX;
	err = snd_pcm_hw_constraint_minmax(substream->runtime,
					   SNDRV_PCM_HW_PARAM_PERIOD_TIME,
					   1500000 / ua->packets_per_second,
					   UINT_MAX);
	if (err < 0)
		return err;
	err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
	return err;
}
示例#2
0
static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	int ret, i, bits;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		bits = dai->driver->playback.sig_bits;
	else
		bits = dai->driver->capture.sig_bits;

	if (!bits)
		return;

	for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
		if (bits >= sample_sizes[i])
			continue;

		ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
						   sample_sizes[i], bits);
		if (ret != 0)
			dev_warn(dai->dev,
				 "Failed to set MSB %d/%d: %d\n",
				 bits, sample_sizes[i], ret);
	}
}
示例#3
0
文件: amdtp-am824.c 项目: mdamt/linux
/**
 * amdtp_am824_add_pcm_hw_constraints - add hw constraints for PCM substream
 * @s:		the AMDTP stream for AM824 data block, must be initialized.
 * @runtime:	the PCM substream runtime
 *
 */
int amdtp_am824_add_pcm_hw_constraints(struct amdtp_stream *s,
				       struct snd_pcm_runtime *runtime)
{
	int err;

	err = amdtp_stream_add_pcm_hw_constraints(s, runtime);
	if (err < 0)
		return err;

	/* AM824 in IEC 61883-6 can deliver 24bit data. */
	return snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
}
int amdtp_tscm_add_pcm_hw_constraints(struct amdtp_stream *s,
				      struct snd_pcm_runtime *runtime)
{
	int err;

	/*
	 * Our implementation allows this protocol to deliver 24 bit sample in
	 * 32bit data channel.
	 */
	err = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
	if (err < 0)
		return err;

	return amdtp_stream_add_pcm_hw_constraints(s, runtime);
}
示例#5
0
static int oxygen_open(struct snd_pcm_substream *substream,
		       unsigned int channel)
{
	struct oxygen *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	runtime->private_data = (void *)(uintptr_t)channel;
	if (channel == PCM_B && chip->has_ac97_1 &&
	    (chip->model.device_config & CAPTURE_2_FROM_AC97_1))
		runtime->hw = oxygen_ac97_hardware;
	else
		runtime->hw = *oxygen_hardware[channel];
	switch (channel) {
	case PCM_C:
		runtime->hw.rates &= ~(SNDRV_PCM_RATE_32000 |
				       SNDRV_PCM_RATE_64000);
		runtime->hw.rate_min = 44100;
		break;
	case PCM_MULTICH:
		runtime->hw.channels_max = chip->model.dac_channels_pcm;
		break;
	}
	if (chip->model.pcm_hardware_filter)
		chip->model.pcm_hardware_filter(channel, &runtime->hw);
	err = snd_pcm_hw_constraint_step(runtime, 0,
					 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	if (err < 0)
		return err;
	err = snd_pcm_hw_constraint_step(runtime, 0,
					 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
	if (err < 0)
		return err;
	if (runtime->hw.formats & SNDRV_PCM_FMTBIT_S32_LE) {
		err = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
		if (err < 0)
			return err;
	}
	if (runtime->hw.channels_max > 2) {
		err = snd_pcm_hw_constraint_step(runtime, 0,
						 SNDRV_PCM_HW_PARAM_CHANNELS,
						 2);
		if (err < 0)
			return err;
	}
	if (channel == PCM_MULTICH) {
		err = snd_pcm_hw_constraint_minmax
			(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 0, 8192000);
		if (err < 0)
			return err;
	}
	snd_pcm_set_sync(substream);
	chip->streams[channel] = substream;

	mutex_lock(&chip->mutex);
	chip->pcm_active |= 1 << channel;
	if (channel == PCM_SPDIF) {
		chip->spdif_pcm_bits = chip->spdif_bits;
		chip->controls[CONTROL_SPDIF_PCM]->vd[0].access &=
			~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE |
			       SNDRV_CTL_EVENT_MASK_INFO,
			       &chip->controls[CONTROL_SPDIF_PCM]->id);
	}
	mutex_unlock(&chip->mutex);

	return 0;
}
static int firewave_channels_constraint(struct snd_pcm_hw_params *params,
					struct snd_pcm_hw_rule *rule)
{
	static const struct snd_interval all_channels = { .min = 6, .max = 6 };
	struct snd_interval *rate =
			hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval *channels =
			hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);

	/* 32/44.1 kHz work only with all six channels */
	if (snd_interval_max(rate) < 48000)
		return snd_interval_refine(channels, &all_channels);
	return 0;
}

static int firewave_constraints(struct snd_pcm_runtime *runtime)
{
	static unsigned int channels_list[] = { 2, 6 };
	static struct snd_pcm_hw_constraint_list channels_list_constraint = {
		.count = 2,
		.list = channels_list,
	};
	int err;

	runtime->hw.rates = SNDRV_PCM_RATE_32000 |
			    SNDRV_PCM_RATE_44100 |
			    SNDRV_PCM_RATE_48000 |
			    SNDRV_PCM_RATE_96000;
	runtime->hw.channels_max = 6;

	err = snd_pcm_hw_constraint_list(runtime, 0,
					 SNDRV_PCM_HW_PARAM_CHANNELS,
					 &channels_list_constraint);
	if (err < 0)
		return err;
	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				  firewave_rate_constraint, NULL,
				  SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	if (err < 0)
		return err;
	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
				  firewave_channels_constraint, NULL,
				  SNDRV_PCM_HW_PARAM_RATE, -1);
	if (err < 0)
		return err;

	return 0;
}

static int lacie_speakers_constraints(struct snd_pcm_runtime *runtime)
{
	runtime->hw.rates = SNDRV_PCM_RATE_32000 |
			    SNDRV_PCM_RATE_44100 |
			    SNDRV_PCM_RATE_48000 |
			    SNDRV_PCM_RATE_88200 |
			    SNDRV_PCM_RATE_96000;

	return 0;
}

static int fwspk_open(struct snd_pcm_substream *substream)
{
	static const struct snd_pcm_hardware hardware = {
		.info = SNDRV_PCM_INFO_MMAP |
			SNDRV_PCM_INFO_MMAP_VALID |
			SNDRV_PCM_INFO_BATCH |
			SNDRV_PCM_INFO_INTERLEAVED |
			SNDRV_PCM_INFO_BLOCK_TRANSFER,
		.formats = AMDTP_OUT_PCM_FORMAT_BITS,
		.channels_min = 2,
		.channels_max = 2,
		.buffer_bytes_max = 4 * 1024 * 1024,
		.period_bytes_min = 1,
		.period_bytes_max = UINT_MAX,
		.periods_min = 1,
		.periods_max = UINT_MAX,
	};
	struct fwspk *fwspk = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	runtime->hw = hardware;

	err = fwspk->device_info->pcm_constraints(runtime);
	if (err < 0)
		return err;
	err = snd_pcm_limit_hw_rates(runtime);
	if (err < 0)
		return err;

	err = snd_pcm_hw_constraint_minmax(runtime,
					   SNDRV_PCM_HW_PARAM_PERIOD_TIME,
					   5000, UINT_MAX);
	if (err < 0)
		return err;

	err = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
	if (err < 0)
		return err;

	return 0;
}

static int fwspk_close(struct snd_pcm_substream *substream)
{
	return 0;
}

static void fwspk_stop_stream(struct fwspk *fwspk)
{
	if (fwspk->stream_running) {
		amdtp_out_stream_stop(&fwspk->stream);
		cmp_connection_break(&fwspk->connection);
		fwspk->stream_running = false;
	}
}

static int fwspk_set_rate(struct fwspk *fwspk, unsigned int sfc)
{
	u8 *buf;
	int err;

	buf = kmalloc(8, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = 0x00;		/* AV/C, CONTROL */
	buf[1] = 0xff;		/* unit */
	buf[2] = 0x19;		/* INPUT PLUG SIGNAL FORMAT */
	buf[3] = 0x00;		/* plug 0 */
	buf[4] = 0x90;		/* format: audio */
	buf[5] = 0x00 | sfc;	/* AM824, frequency */
	buf[6] = 0xff;		/* SYT (not used) */
	buf[7] = 0xff;

	err = fcp_avc_transaction(fwspk->unit, buf, 8, buf, 8,
				  BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
	if (err < 0)
		goto error;
	if (err < 6 || buf[0] != 0x09 /* ACCEPTED */) {
		dev_err(&fwspk->unit->device, "failed to set sample rate\n");
		err = -EIO;
		goto error;
	}

	err = 0;

error:
	kfree(buf);

	return err;
}

static int fwspk_hw_params(struct snd_pcm_substream *substream,
			   struct snd_pcm_hw_params *hw_params)
{
	struct fwspk *fwspk = substream->private_data;
	int err;

	mutex_lock(&fwspk->mutex);
	fwspk_stop_stream(fwspk);
	mutex_unlock(&fwspk->mutex);

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

	amdtp_out_stream_set_rate(&fwspk->stream, params_rate(hw_params));
	amdtp_out_stream_set_pcm(&fwspk->stream, params_channels(hw_params));

	amdtp_out_stream_set_pcm_format(&fwspk->stream,
					params_format(hw_params));

	err = fwspk_set_rate(fwspk, fwspk->stream.sfc);
	if (err < 0)
		goto err_buffer;

	return 0;

err_buffer:
	snd_pcm_lib_free_vmalloc_buffer(substream);
error:
	return err;
}

static int fwspk_hw_free(struct snd_pcm_substream *substream)
{
	struct fwspk *fwspk = substream->private_data;

	mutex_lock(&fwspk->mutex);
	fwspk_stop_stream(fwspk);
	mutex_unlock(&fwspk->mutex);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int fwspk_prepare(struct snd_pcm_substream *substream)
{
	struct fwspk *fwspk = substream->private_data;
	int err;

	mutex_lock(&fwspk->mutex);

	if (amdtp_out_streaming_error(&fwspk->stream))
		fwspk_stop_stream(fwspk);

	if (!fwspk->stream_running) {
		err = cmp_connection_establish(&fwspk->connection,
			amdtp_out_stream_get_max_payload(&fwspk->stream));
		if (err < 0)
			goto err_mutex;

		err = amdtp_out_stream_start(&fwspk->stream,
					fwspk->connection.resources.channel,
					fwspk->connection.speed);
		if (err < 0)
			goto err_connection;

		fwspk->stream_running = true;
	}

	mutex_unlock(&fwspk->mutex);

	amdtp_out_stream_pcm_prepare(&fwspk->stream);

	return 0;

err_connection:
	cmp_connection_break(&fwspk->connection);
err_mutex:
	mutex_unlock(&fwspk->mutex);

	return err;
}

static int fwspk_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct fwspk *fwspk = substream->private_data;
	struct snd_pcm_substream *pcm;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		pcm = substream;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		pcm = NULL;
		break;
	default:
		return -EINVAL;
	}
	amdtp_out_stream_pcm_trigger(&fwspk->stream, pcm);
	return 0;
}

static snd_pcm_uframes_t fwspk_pointer(struct snd_pcm_substream *substream)
{
	struct fwspk *fwspk = substream->private_data;

	return amdtp_out_stream_pcm_pointer(&fwspk->stream);
}

static int fwspk_create_pcm(struct fwspk *fwspk)
{
	static struct snd_pcm_ops ops = {
		.open      = fwspk_open,
		.close     = fwspk_close,
		.ioctl     = snd_pcm_lib_ioctl,
		.hw_params = fwspk_hw_params,
		.hw_free   = fwspk_hw_free,
		.prepare   = fwspk_prepare,
		.trigger   = fwspk_trigger,
		.pointer   = fwspk_pointer,
		.page      = snd_pcm_lib_get_vmalloc_page,
		.mmap      = snd_pcm_lib_mmap_vmalloc,
	};
	struct snd_pcm *pcm;
	int err;

	err = snd_pcm_new(fwspk->card, "OXFW970", 0, 1, 0, &pcm);
	if (err < 0)
		return err;
	pcm->private_data = fwspk;
	strcpy(pcm->name, fwspk->device_info->short_name);
	fwspk->pcm = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
	fwspk->pcm->ops = &ops;
	return 0;
}

enum control_action { CTL_READ, CTL_WRITE };
enum control_attribute {
	CTL_MIN		= 0x02,
	CTL_MAX		= 0x03,
	CTL_CURRENT	= 0x10,
};

static int fwspk_mute_command(struct fwspk *fwspk, bool *value,
			      enum control_action action)
{
	u8 *buf;
	u8 response_ok;
	int err;

	buf = kmalloc(11, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	if (action == CTL_READ) {
		buf[0] = 0x01;		/* AV/C, STATUS */
		response_ok = 0x0c;	/*       STABLE */
	} else {
		buf[0] = 0x00;		/* AV/C, CONTROL */
		response_ok = 0x09;	/*       ACCEPTED */
	}
	buf[1] = 0x08;			/* audio unit 0 */
	buf[2] = 0xb8;			/* FUNCTION BLOCK */
	buf[3] = 0x81;			/* function block type: feature */
	buf[4] = fwspk->device_info->mute_fb_id; /* function block ID */
	buf[5] = 0x10;			/* control attribute: current */
	buf[6] = 0x02;			/* selector length */
	buf[7] = 0x00;			/* audio channel number */
	buf[8] = 0x01;			/* control selector: mute */
	buf[9] = 0x01;			/* control data length */
	if (action == CTL_READ)
		buf[10] = 0xff;
	else
		buf[10] = *value ? 0x70 : 0x60;

	err = fcp_avc_transaction(fwspk->unit, buf, 11, buf, 11, 0x3fe);
	if (err < 0)
		goto error;
	if (err < 11) {
		dev_err(&fwspk->unit->device, "short FCP response\n");
		err = -EIO;
		goto error;
	}
	if (buf[0] != response_ok) {
		dev_err(&fwspk->unit->device, "mute command failed\n");
		err = -EIO;
		goto error;
	}
	if (action == CTL_READ)
		*value = buf[10] == 0x70;

	err = 0;

error:
	kfree(buf);

	return err;
}
示例#7
0
static int
pcm_init_hw_params(struct snd_bebob *bebob,
			struct snd_pcm_substream *substream)
{
	int err;

	static const struct snd_pcm_hardware hw = {
		.info = SNDRV_PCM_INFO_MMAP |
			SNDRV_PCM_INFO_BATCH |
			SNDRV_PCM_INFO_INTERLEAVED |
			SNDRV_PCM_INFO_SYNC_START |
			SNDRV_PCM_INFO_FIFO_IN_FRAMES |
			SNDRV_PCM_INFO_JOINT_DUPLEX |
			/* for Open Sound System compatibility */
			SNDRV_PCM_INFO_MMAP_VALID |
			SNDRV_PCM_INFO_BLOCK_TRANSFER,
		/* set up later */
		.rates = 0,
		.rate_min = UINT_MAX,
		.rate_max = 0,
		/* set up later */
		.channels_min = UINT_MAX,
		.channels_max = 0,
		.buffer_bytes_max = 1024 * 1024 * 1024,
		.period_bytes_min = 256,
		.period_bytes_max = 1024 * 1024 * 1024 / 2,
		.periods_min = 2,
		.periods_max = 32,
		.fifo_size = 0,
	};

	substream->runtime->hw = hw;
	substream->runtime->delay = substream->runtime->hw.fifo_size;

	/* add rule between channels and sampling rate */
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		prepare_rates(&substream->runtime->hw,
			      bebob->tx_stream_formations);
		prepare_channels(&substream->runtime->hw,
				 bebob->tx_stream_formations);
		substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32_LE;
		snd_pcm_hw_rule_add(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_CHANNELS,
				hw_rule_capture_channels, bebob,
				SNDRV_PCM_HW_PARAM_RATE, -1);
		snd_pcm_hw_rule_add(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				hw_rule_capture_rate, bebob,
				SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	} else {
		prepare_rates(&substream->runtime->hw,
			      bebob->rx_stream_formations);
		prepare_channels(&substream->runtime->hw,
				 bebob->rx_stream_formations);
		substream->runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS;
		snd_pcm_hw_rule_add(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_CHANNELS,
				hw_rule_playback_channels, bebob,
				SNDRV_PCM_HW_PARAM_RATE, -1);
		snd_pcm_hw_rule_add(substream->runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE,
				hw_rule_playback_rate, bebob,
				SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	}

	/* AM824 in IEC 61883-6 can deliver 24bit data */
	err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
	if (err < 0)
		goto end;

	/*
	 * AMDTP functionality in firewire-lib require periods to be aligned to
	 * 16 bit, or 24bit inner 32bit.
	 */
	err = snd_pcm_hw_constraint_step(substream->runtime, 0,
					 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	if (err < 0)
		goto end;

	/* time for period constraint */
	err = snd_pcm_hw_constraint_minmax(substream->runtime,
					SNDRV_PCM_HW_PARAM_PERIOD_TIME,
					500, UINT_MAX);
	if (err < 0)
		goto end;

	err = 0;
end:
	return err;
}

static int
pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_bebob *bebob = substream->private_data;
	struct snd_bebob_rate_spec *spec = bebob->spec->rate;
	unsigned int sampling_rate;
	bool internal;
	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_check_internal_clock(bebob, &internal);
	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 (!internal ||
	    amdtp_stream_pcm_running(&bebob->tx_stream) ||
	    amdtp_stream_pcm_running(&bebob->rx_stream)) {
		err = spec->get(bebob, &sampling_rate);
		if (err < 0)
			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_hw_params(struct snd_pcm_substream *substream,
	      struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_alloc_vmalloc_buffer(substream,
						params_buffer_bytes(hw_params));
}

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

	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, &bebob->tx_stream,
					    runtime->rate);
	if (err < 0)
		goto end;

	amdtp_stream_set_pcm_format(&bebob->tx_stream, runtime->format);
	amdtp_stream_pcm_prepare(&bebob->tx_stream);
end:
	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, &bebob->rx_stream,
					    runtime->rate);
	if (err < 0)
		goto end;

	amdtp_stream_set_pcm_format(&bebob->rx_stream, runtime->format);
	amdtp_stream_pcm_prepare(&bebob->rx_stream);
end:
	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 struct snd_pcm_ops pcm_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,
	.page		= snd_pcm_lib_get_vmalloc_page,
};
static struct snd_pcm_ops pcm_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,
	.page		= snd_pcm_lib_get_vmalloc_page,
	.mmap		= snd_pcm_lib_mmap_vmalloc,
};

int snd_bebob_create_pcm_devices(struct snd_bebob *bebob)
{
	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, &pcm_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);

end:
	return err;
}