[deliverable/linux.git] / sound / firewire / dice / dice-pcm.c

/*
 * dice_pcm.c - a part of driver for DICE based devices
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 * Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "dice.h"

static int limit_channels_and_rates(struct snd_dice *dice,
				    struct snd_pcm_runtime *runtime,
				    enum amdtp_stream_direction dir,
				    unsigned int index, unsigned int size)
{
	struct snd_pcm_hardware *hw = &runtime->hw;
	struct amdtp_stream *stream;
	unsigned int rate;
	__be32 reg;
	int err;

	/*
	 * Retrieve current Multi Bit Linear Audio data channel and limit to
	 * it.
	 */
	if (dir == AMDTP_IN_STREAM) {
		stream = &dice->tx_stream[index];
		err = snd_dice_transaction_read_tx(dice,
				size * index + TX_NUMBER_AUDIO,
				&reg, sizeof(reg));
	} else {
		stream = &dice->rx_stream[index];
		err = snd_dice_transaction_read_rx(dice,
				size * index + RX_NUMBER_AUDIO,
				&reg, sizeof(reg));
	}
	if (err < 0)
		return err;

	hw->channels_min = hw->channels_max = be32_to_cpu(reg);

	/* Retrieve current sampling transfer frequency and limit to it. */
	err = snd_dice_transaction_get_rate(dice, &rate);
	if (err < 0)
		return err;

	hw->rates = snd_pcm_rate_to_rate_bit(rate);
	snd_pcm_limit_hw_rates(runtime);

	return 0;
}

static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
{
	hw->periods_min = 2;			/* SNDRV_PCM_INFO_BATCH */
	hw->periods_max = UINT_MAX;

	hw->period_bytes_min = 4 * hw->channels_max;    /* byte for a frame */

	/* Just to prevent from allocating much pages. */
	hw->period_bytes_max = hw->period_bytes_min * 2048;
	hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
}

static int init_hw_info(struct snd_dice *dice,
			struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_pcm_hardware *hw = &runtime->hw;
	enum amdtp_stream_direction dir;
	struct amdtp_stream *stream;
	__be32 reg[2];
	unsigned int count, size;
	int err;

	hw->info = SNDRV_PCM_INFO_MMAP |
		   SNDRV_PCM_INFO_MMAP_VALID |
		   SNDRV_PCM_INFO_BATCH |
		   SNDRV_PCM_INFO_INTERLEAVED |
		   SNDRV_PCM_INFO_JOINT_DUPLEX |
		   SNDRV_PCM_INFO_BLOCK_TRANSFER;

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		hw->formats = AM824_IN_PCM_FORMAT_BITS;
		dir = AMDTP_IN_STREAM;
		stream = &dice->tx_stream[substream->pcm->device];
		err = snd_dice_transaction_read_tx(dice, TX_NUMBER, reg,
						   sizeof(reg));
	} else {
		hw->formats = AM824_OUT_PCM_FORMAT_BITS;
		dir = AMDTP_OUT_STREAM;
		stream = &dice->rx_stream[substream->pcm->device];
		err = snd_dice_transaction_read_rx(dice, RX_NUMBER, reg,
						   sizeof(reg));
	}

	if (err < 0)
		return err;

	count = min_t(unsigned int, be32_to_cpu(reg[0]), MAX_STREAMS);
	if (substream->pcm->device >= count)
		return -ENXIO;

	size = be32_to_cpu(reg[1]) * 4;
	err = limit_channels_and_rates(dice, substream->runtime, dir,
				       substream->pcm->device, size);
	if (err < 0)
		return err;
	limit_period_and_buffer(hw);

	return amdtp_am824_add_pcm_hw_constraints(stream, runtime);
}

static int pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;
	int err;

	err = snd_dice_stream_lock_try(dice);
	if (err < 0)
		goto end;

	err = init_hw_info(dice, substream);
	if (err < 0)
		goto err_locked;

	snd_pcm_set_sync(substream);
end:
	return err;
err_locked:
	snd_dice_stream_lock_release(dice);
	return err;
}

static int pcm_close(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;

	snd_dice_stream_lock_release(dice);

	return 0;
}

static int capture_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *hw_params)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
	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(&dice->mutex);
		dice->substreams_counter++;
		mutex_unlock(&dice->mutex);
	}

	amdtp_am824_set_pcm_format(stream, params_format(hw_params));

	return 0;
}
static int playback_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *hw_params)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
	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(&dice->mutex);
		dice->substreams_counter++;
		mutex_unlock(&dice->mutex);
	}

	amdtp_am824_set_pcm_format(stream, params_format(hw_params));

	return 0;
}

static int capture_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;

	mutex_lock(&dice->mutex);

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

	snd_dice_stream_stop_duplex(dice);

	mutex_unlock(&dice->mutex);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int playback_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;

	mutex_lock(&dice->mutex);

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

	snd_dice_stream_stop_duplex(dice);

	mutex_unlock(&dice->mutex);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int capture_prepare(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
	int err;

	mutex_lock(&dice->mutex);
	err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
	mutex_unlock(&dice->mutex);
	if (err >= 0)
		amdtp_stream_pcm_prepare(stream);

	return 0;
}
static int playback_prepare(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
	int err;

	mutex_lock(&dice->mutex);
	err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
	mutex_unlock(&dice->mutex);
	if (err >= 0)
		amdtp_stream_pcm_prepare(stream);

	return err;
}

static int capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];

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

	return 0;
}
static int playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];

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

	return 0;
}

static snd_pcm_uframes_t capture_pointer(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];

	return amdtp_stream_pcm_pointer(stream);
}
static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
{
	struct snd_dice *dice = substream->private_data;
	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];

	return amdtp_stream_pcm_pointer(stream);
}

int snd_dice_create_pcm(struct snd_dice *dice)
{
	static const struct snd_pcm_ops capture_ops = {
		.open      = pcm_open,
		.close     = pcm_close,
		.ioctl     = snd_pcm_lib_ioctl,
		.hw_params = capture_hw_params,
		.hw_free   = capture_hw_free,
		.prepare   = capture_prepare,
		.trigger   = capture_trigger,
		.pointer   = capture_pointer,
		.page      = snd_pcm_lib_get_vmalloc_page,
		.mmap      = snd_pcm_lib_mmap_vmalloc,
	};
	static const struct snd_pcm_ops playback_ops = {
		.open      = pcm_open,
		.close     = pcm_close,
		.ioctl     = snd_pcm_lib_ioctl,
		.hw_params = playback_hw_params,
		.hw_free   = playback_hw_free,
		.prepare   = playback_prepare,
		.trigger   = playback_trigger,
		.pointer   = playback_pointer,
		.page      = snd_pcm_lib_get_vmalloc_page,
		.mmap      = snd_pcm_lib_mmap_vmalloc,
	};
	__be32 reg;
	struct snd_pcm *pcm;
	unsigned int i, max_capture, max_playback, capture, playback;
	int err;

	/* Check whether PCM substreams are required. */
	if (dice->force_two_pcms) {
		max_capture = max_playback = 2;
	} else {
		max_capture = max_playback = 0;
		err = snd_dice_transaction_read_tx(dice, TX_NUMBER, &reg,
						   sizeof(reg));
		if (err < 0)
			return err;
		max_capture = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);

		err = snd_dice_transaction_read_rx(dice, RX_NUMBER, &reg,
						   sizeof(reg));
		if (err < 0)
			return err;
		max_playback = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
	}

	for (i = 0; i < MAX_STREAMS; i++) {
		capture = playback = 0;
		if (i < max_capture)
			capture = 1;
		if (i < max_playback)
			playback = 1;
		if (capture == 0 && playback == 0)
			break;

		err = snd_pcm_new(dice->card, "DICE", i, playback, capture,
				  &pcm);
		if (err < 0)
			return err;
		pcm->private_data = dice;
		strcpy(pcm->name, dice->card->shortname);

		if (capture > 0)
			snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
					&capture_ops);

		if (playback > 0)
			snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
					&playback_ops);
	}

	return 0;
}
Commit	Line	Data
c50fb91f TS	1	/*
	2	* dice_pcm.c - a part of driver for DICE based devices
	3	*
	4	* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
	5	* Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
	6	*
	7	* Licensed under the terms of the GNU General Public License, version 2.
	8	*/
	9
	10	#include "dice.h"
	11
0d5ee195 TS	12	static int limit_channels_and_rates(struct snd_dice *dice,
0d5ee195 TS	13	struct snd_pcm_runtime *runtime,
4bdc495c TS	14	enum amdtp_stream_direction dir,
4bdc495c TS	15	unsigned int index, unsigned int size)
c50fb91f	16	{
2c2416c8	17	struct snd_pcm_hardware *hw = &runtime->hw;
4bdc495c	18	struct amdtp_stream *stream;
0d5ee195	19	unsigned int rate;
4bdc495c	20	__be32 reg;
0d5ee195	21	int err;
c50fb91f	22
0d5ee195 TS	23	/*
	24	* Retrieve current Multi Bit Linear Audio data channel and limit to
	25	* it.
	26	*/
4bdc495c TS	27	if (dir == AMDTP_IN_STREAM) {
	28	stream = &dice->tx_stream[index];
	29	err = snd_dice_transaction_read_tx(dice,
	30	size * index + TX_NUMBER_AUDIO,
	31	&reg, sizeof(reg));
0d5ee195	32	} else {
4bdc495c TS	33	stream = &dice->rx_stream[index];
	34	err = snd_dice_transaction_read_rx(dice,
	35	size * index + RX_NUMBER_AUDIO,
	36	&reg, sizeof(reg));
0d5ee195 TS	37	}
	38	if (err < 0)
	39	return err;
c50fb91f	40
4bdc495c	41	hw->channels_min = hw->channels_max = be32_to_cpu(reg);
2c2416c8	42
0d5ee195 TS	43	/* Retrieve current sampling transfer frequency and limit to it. */
	44	err = snd_dice_transaction_get_rate(dice, &rate);
	45	if (err < 0)
	46	return err;
2c2416c8	47
0d5ee195	48	hw->rates = snd_pcm_rate_to_rate_bit(rate);
c50fb91f	49	snd_pcm_limit_hw_rates(runtime);
0d5ee195 TS	50
0d5ee195 TS	51	return 0;
2c2416c8	52	}
c50fb91f	53
2c2416c8 TS	54	static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
	55	{
	56	hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
	57	hw->periods_max = UINT_MAX;
	58
	59	hw->period_bytes_min = 4 * hw->channels_max; /* byte for a frame */
	60
	61	/* Just to prevent from allocating much pages. */
	62	hw->period_bytes_max = hw->period_bytes_min * 2048;
	63	hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
	64	}
	65
	66	static int init_hw_info(struct snd_dice *dice,
	67	struct snd_pcm_substream *substream)
	68	{
	69	struct snd_pcm_runtime *runtime = substream->runtime;
	70	struct snd_pcm_hardware *hw = &runtime->hw;
4bdc495c	71	enum amdtp_stream_direction dir;
69dcf3e4	72	struct amdtp_stream *stream;
4bdc495c TS	73	__be32 reg[2];
4bdc495c TS	74	unsigned int count, size;
2c2416c8 TS	75	int err;
	76
	77	hw->info = SNDRV_PCM_INFO_MMAP \|
	78	SNDRV_PCM_INFO_MMAP_VALID \|
	79	SNDRV_PCM_INFO_BATCH \|
	80	SNDRV_PCM_INFO_INTERLEAVED \|
69dcf3e4	81	SNDRV_PCM_INFO_JOINT_DUPLEX \|
2c2416c8	82	SNDRV_PCM_INFO_BLOCK_TRANSFER;
2c2416c8	83
69dcf3e4	84	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
49c7b3fc	85	hw->formats = AM824_IN_PCM_FORMAT_BITS;
4bdc495c TS	86	dir = AMDTP_IN_STREAM;
	87	stream = &dice->tx_stream[substream->pcm->device];
	88	err = snd_dice_transaction_read_tx(dice, TX_NUMBER, reg,
	89	sizeof(reg));
69dcf3e4	90	} else {
49c7b3fc	91	hw->formats = AM824_OUT_PCM_FORMAT_BITS;
4bdc495c TS	92	dir = AMDTP_OUT_STREAM;
	93	stream = &dice->rx_stream[substream->pcm->device];
	94	err = snd_dice_transaction_read_rx(dice, RX_NUMBER, reg,
	95	sizeof(reg));
69dcf3e4 TS	96	}
69dcf3e4 TS	97
4bdc495c TS	98	if (err < 0)
	99	return err;
	100
	101	count = min_t(unsigned int, be32_to_cpu(reg[0]), MAX_STREAMS);
	102	if (substream->pcm->device >= count)
	103	return -ENXIO;
	104
	105	size = be32_to_cpu(reg[1]) * 4;
	106	err = limit_channels_and_rates(dice, substream->runtime, dir,
	107	substream->pcm->device, size);
c50fb91f	108	if (err < 0)
0d5ee195 TS	109	return err;
0d5ee195 TS	110	limit_period_and_buffer(hw);
c50fb91f	111
0d5ee195	112	return amdtp_am824_add_pcm_hw_constraints(stream, runtime);
2c2416c8	113	}
c50fb91f	114
2c2416c8 TS	115	static int pcm_open(struct snd_pcm_substream *substream)
	116	{
	117	struct snd_dice *dice = substream->private_data;
	118	int err;
c50fb91f	119
2c2416c8 TS	120	err = snd_dice_stream_lock_try(dice);
	121	if (err < 0)
	122	goto end;
	123
	124	err = init_hw_info(dice, substream);
	125	if (err < 0)
	126	goto err_locked;
8fc01fc0	127
8fc01fc0	128	snd_pcm_set_sync(substream);
2c2416c8 TS	129	end:
	130	return err;
	131	err_locked:
c50fb91f	132	snd_dice_stream_lock_release(dice);
c50fb91f TS	133	return err;
	134	}
	135
	136	static int pcm_close(struct snd_pcm_substream *substream)
	137	{
	138	struct snd_dice *dice = substream->private_data;
	139
	140	snd_dice_stream_lock_release(dice);
	141
	142	return 0;
	143	}
	144
69dcf3e4 TS	145	static int capture_hw_params(struct snd_pcm_substream *substream,
	146	struct snd_pcm_hw_params *hw_params)
	147	{
	148	struct snd_dice *dice = substream->private_data;
4bdc495c	149	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
22c103cd TS	150	int err;
	151
	152	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	153	params_buffer_bytes(hw_params));
	154	if (err < 0)
	155	return err;
69dcf3e4 TS	156
	157	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
	158	mutex_lock(&dice->mutex);
	159	dice->substreams_counter++;
	160	mutex_unlock(&dice->mutex);
	161	}
	162
8ae25b76	163	amdtp_am824_set_pcm_format(stream, params_format(hw_params));
69dcf3e4	164
22c103cd	165	return 0;
69dcf3e4	166	}
c50fb91f TS	167	static int playback_hw_params(struct snd_pcm_substream *substream,
	168	struct snd_pcm_hw_params *hw_params)
	169	{
	170	struct snd_dice *dice = substream->private_data;
4bdc495c	171	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
22c103cd TS	172	int err;
	173
	174	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	175	params_buffer_bytes(hw_params));
	176	if (err < 0)
	177	return err;
69dcf3e4 TS	178
	179	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
	180	mutex_lock(&dice->mutex);
	181	dice->substreams_counter++;
	182	mutex_unlock(&dice->mutex);
	183	}
	184
8ae25b76	185	amdtp_am824_set_pcm_format(stream, params_format(hw_params));
c50fb91f	186
22c103cd	187	return 0;
c50fb91f TS	188	}
c50fb91f TS	189
69dcf3e4 TS	190	static int capture_hw_free(struct snd_pcm_substream *substream)
	191	{
	192	struct snd_dice *dice = substream->private_data;
	193
	194	mutex_lock(&dice->mutex);
	195
	196	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
	197	dice->substreams_counter--;
	198
	199	snd_dice_stream_stop_duplex(dice);
	200
	201	mutex_unlock(&dice->mutex);
	202
	203	return snd_pcm_lib_free_vmalloc_buffer(substream);
	204	}
	205
c50fb91f TS	206	static int playback_hw_free(struct snd_pcm_substream *substream)
	207	{
	208	struct snd_dice *dice = substream->private_data;
	209
	210	mutex_lock(&dice->mutex);
69dcf3e4 TS	211
	212	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
	213	dice->substreams_counter--;
	214
9a02843c	215	snd_dice_stream_stop_duplex(dice);
69dcf3e4	216
c50fb91f TS	217	mutex_unlock(&dice->mutex);
	218
	219	return snd_pcm_lib_free_vmalloc_buffer(substream);
	220	}
	221
69dcf3e4 TS	222	static int capture_prepare(struct snd_pcm_substream *substream)
	223	{
	224	struct snd_dice *dice = substream->private_data;
4bdc495c	225	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
69dcf3e4 TS	226	int err;
	227
	228	mutex_lock(&dice->mutex);
	229	err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
	230	mutex_unlock(&dice->mutex);
	231	if (err >= 0)
8ae25b76	232	amdtp_stream_pcm_prepare(stream);
69dcf3e4 TS	233
	234	return 0;
	235	}
c50fb91f TS	236	static int playback_prepare(struct snd_pcm_substream *substream)
	237	{
	238	struct snd_dice *dice = substream->private_data;
4bdc495c	239	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
c50fb91f TS	240	int err;
	241
	242	mutex_lock(&dice->mutex);
9a02843c	243	err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
c50fb91f	244	mutex_unlock(&dice->mutex);
288a8d0c	245	if (err >= 0)
8ae25b76	246	amdtp_stream_pcm_prepare(stream);
c50fb91f	247
288a8d0c	248	return err;
c50fb91f TS	249	}
c50fb91f TS	250
69dcf3e4 TS	251	static int capture_trigger(struct snd_pcm_substream *substream, int cmd)
	252	{
	253	struct snd_dice *dice = substream->private_data;
4bdc495c	254	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
69dcf3e4 TS	255
	256	switch (cmd) {
	257	case SNDRV_PCM_TRIGGER_START:
8ae25b76	258	amdtp_stream_pcm_trigger(stream, substream);
69dcf3e4 TS	259	break;
69dcf3e4 TS	260	case SNDRV_PCM_TRIGGER_STOP:
8ae25b76	261	amdtp_stream_pcm_trigger(stream, NULL);
69dcf3e4 TS	262	break;
	263	default:
	264	return -EINVAL;
	265	}
	266
	267	return 0;
	268	}
c50fb91f TS	269	static int playback_trigger(struct snd_pcm_substream *substream, int cmd)
	270	{
	271	struct snd_dice *dice = substream->private_data;
4bdc495c	272	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
c50fb91f TS	273
	274	switch (cmd) {
	275	case SNDRV_PCM_TRIGGER_START:
8ae25b76	276	amdtp_stream_pcm_trigger(stream, substream);
c50fb91f TS	277	break;
c50fb91f TS	278	case SNDRV_PCM_TRIGGER_STOP:
8ae25b76	279	amdtp_stream_pcm_trigger(stream, NULL);
c50fb91f TS	280	break;
	281	default:
	282	return -EINVAL;
	283	}
	284
	285	return 0;
	286	}
	287
69dcf3e4 TS	288	static snd_pcm_uframes_t capture_pointer(struct snd_pcm_substream *substream)
	289	{
	290	struct snd_dice *dice = substream->private_data;
4bdc495c	291	struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device];
69dcf3e4	292
8ae25b76	293	return amdtp_stream_pcm_pointer(stream);
69dcf3e4	294	}
c50fb91f TS	295	static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
	296	{
	297	struct snd_dice *dice = substream->private_data;
4bdc495c	298	struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device];
c50fb91f	299
8ae25b76	300	return amdtp_stream_pcm_pointer(stream);
c50fb91f TS	301	}
	302
	303	int snd_dice_create_pcm(struct snd_dice *dice)
	304	{
5116ffc3	305	static const struct snd_pcm_ops capture_ops = {
69dcf3e4 TS	306	.open = pcm_open,
	307	.close = pcm_close,
	308	.ioctl = snd_pcm_lib_ioctl,
	309	.hw_params = capture_hw_params,
	310	.hw_free = capture_hw_free,
	311	.prepare = capture_prepare,
	312	.trigger = capture_trigger,
	313	.pointer = capture_pointer,
	314	.page = snd_pcm_lib_get_vmalloc_page,
	315	.mmap = snd_pcm_lib_mmap_vmalloc,
	316	};
5116ffc3	317	static const struct snd_pcm_ops playback_ops = {
c50fb91f TS	318	.open = pcm_open,
	319	.close = pcm_close,
	320	.ioctl = snd_pcm_lib_ioctl,
	321	.hw_params = playback_hw_params,
	322	.hw_free = playback_hw_free,
	323	.prepare = playback_prepare,
	324	.trigger = playback_trigger,
	325	.pointer = playback_pointer,
	326	.page = snd_pcm_lib_get_vmalloc_page,
	327	.mmap = snd_pcm_lib_mmap_vmalloc,
	328	};
c3007656	329	__be32 reg;
c50fb91f	330	struct snd_pcm *pcm;
4bdc495c	331	unsigned int i, max_capture, max_playback, capture, playback;
c50fb91f TS	332	int err;
c50fb91f TS	333
4bdc495c	334	/* Check whether PCM substreams are required. */
7cafc65b TS	335	if (dice->force_two_pcms) {
	336	max_capture = max_playback = 2;
	337	} else {
	338	max_capture = max_playback = 0;
	339	err = snd_dice_transaction_read_tx(dice, TX_NUMBER, &reg,
	340	sizeof(reg));
	341	if (err < 0)
	342	return err;
	343	max_capture = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
69dcf3e4	344
7cafc65b TS	345	err = snd_dice_transaction_read_rx(dice, RX_NUMBER, &reg,
	346	sizeof(reg));
	347	if (err < 0)
	348	return err;
	349	max_playback = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS);
	350	}
4bdc495c TS	351
	352	for (i = 0; i < MAX_STREAMS; i++) {
	353	capture = playback = 0;
	354	if (i < max_capture)
	355	capture = 1;
	356	if (i < max_playback)
	357	playback = 1;
	358	if (capture == 0 && playback == 0)
	359	break;
	360
	361	err = snd_pcm_new(dice->card, "DICE", i, playback, capture,
	362	&pcm);
	363	if (err < 0)
	364	return err;
	365	pcm->private_data = dice;
	366	strcpy(pcm->name, dice->card->shortname);
	367
	368	if (capture > 0)
	369	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
	370	&capture_ops);
	371
	372	if (playback > 0)
	373	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
	374	&playback_ops);
	375	}
c50fb91f TS	376
	377	return 0;
	378	}