[linux-2.6-block.git] / sound / soc / fsl / fsl_asrc_dma.c

// SPDX-License-Identifier: GPL-2.0
//
// Freescale ASRC ALSA SoC Platform (DMA) driver
//
// Copyright (C) 2014 Freescale Semiconductor, Inc.
//
// Author: Nicolin Chen <nicoleotsuka@gmail.com>

#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/platform_data/dma-imx.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>

#include "fsl_asrc.h"

#define FSL_ASRC_DMABUF_SIZE	(256 * 1024)

static const struct snd_pcm_hardware snd_imx_hardware = {
	.info = SNDRV_PCM_INFO_INTERLEAVED |
		SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_MMAP |
		SNDRV_PCM_INFO_MMAP_VALID |
		SNDRV_PCM_INFO_PAUSE |
		SNDRV_PCM_INFO_RESUME,
	.buffer_bytes_max = FSL_ASRC_DMABUF_SIZE,
	.period_bytes_min = 128,
	.period_bytes_max = 65535, /* Limited by SDMA engine */
	.periods_min = 2,
	.periods_max = 255,
	.fifo_size = 0,
};

static bool filter(struct dma_chan *chan, void *param)
{
	if (!imx_dma_is_general_purpose(chan))
		return false;

	chan->private = param;

	return true;
}

static void fsl_asrc_dma_complete(void *arg)
{
	struct snd_pcm_substream *substream = arg;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;

	pair->pos += snd_pcm_lib_period_bytes(substream);
	if (pair->pos >= snd_pcm_lib_buffer_bytes(substream))
		pair->pos = 0;

	snd_pcm_period_elapsed(substream);
}

static int fsl_asrc_dma_prepare_and_submit(struct snd_pcm_substream *substream)
{
	u8 dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? OUT : IN;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
	struct device *dev = component->dev;
	unsigned long flags = DMA_CTRL_ACK;

	/* Prepare and submit Front-End DMA channel */
	if (!substream->runtime->no_period_wakeup)
		flags |= DMA_PREP_INTERRUPT;

	pair->pos = 0;
	pair->desc[!dir] = dmaengine_prep_dma_cyclic(
			pair->dma_chan[!dir], runtime->dma_addr,
			snd_pcm_lib_buffer_bytes(substream),
			snd_pcm_lib_period_bytes(substream),
			dir == OUT ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, flags);
	if (!pair->desc[!dir]) {
		dev_err(dev, "failed to prepare slave DMA for Front-End\n");
		return -ENOMEM;
	}

	pair->desc[!dir]->callback = fsl_asrc_dma_complete;
	pair->desc[!dir]->callback_param = substream;

	dmaengine_submit(pair->desc[!dir]);

	/* Prepare and submit Back-End DMA channel */
	pair->desc[dir] = dmaengine_prep_dma_cyclic(
			pair->dma_chan[dir], 0xffff, 64, 64, DMA_DEV_TO_DEV, 0);
	if (!pair->desc[dir]) {
		dev_err(dev, "failed to prepare slave DMA for Back-End\n");
		return -ENOMEM;
	}

	dmaengine_submit(pair->desc[dir]);

	return 0;
}

static int fsl_asrc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;
	int ret;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		ret = fsl_asrc_dma_prepare_and_submit(substream);
		if (ret)
			return ret;
		dma_async_issue_pending(pair->dma_chan[IN]);
		dma_async_issue_pending(pair->dma_chan[OUT]);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		dmaengine_terminate_all(pair->dma_chan[OUT]);
		dmaengine_terminate_all(pair->dma_chan[IN]);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int fsl_asrc_dma_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *params)
{
	enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	struct snd_dmaengine_dai_dma_data *dma_params_fe = NULL;
	struct snd_dmaengine_dai_dma_data *dma_params_be = NULL;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;
	struct fsl_asrc *asrc_priv = pair->asrc_priv;
	struct dma_slave_config config_fe, config_be;
	enum asrc_pair_index index = pair->index;
	struct device *dev = component->dev;
	int stream = substream->stream;
	struct imx_dma_data *tmp_data;
	struct snd_soc_dpcm *dpcm;
	struct dma_chan *tmp_chan;
	struct device *dev_be;
	u8 dir = tx ? OUT : IN;
	dma_cap_mask_t mask;
	int ret;

	/* Fetch the Back-End dma_data from DPCM */
	for_each_dpcm_be(rtd, stream, dpcm) {
		struct snd_soc_pcm_runtime *be = dpcm->be;
		struct snd_pcm_substream *substream_be;
		struct snd_soc_dai *dai = be->cpu_dai;

		if (dpcm->fe != rtd)
			continue;

		substream_be = snd_soc_dpcm_get_substream(be, stream);
		dma_params_be = snd_soc_dai_get_dma_data(dai, substream_be);
		dev_be = dai->dev;
		break;
	}

	if (!dma_params_be) {
		dev_err(dev, "failed to get the substream of Back-End\n");
		return -EINVAL;
	}

	/* Override dma_data of the Front-End and config its dmaengine */
	dma_params_fe = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
	dma_params_fe->addr = asrc_priv->paddr + REG_ASRDx(!dir, index);
	dma_params_fe->maxburst = dma_params_be->maxburst;

	pair->dma_chan[!dir] = fsl_asrc_get_dma_channel(pair, !dir);
	if (!pair->dma_chan[!dir]) {
		dev_err(dev, "failed to request DMA channel\n");
		return -EINVAL;
	}

	memset(&config_fe, 0, sizeof(config_fe));
	ret = snd_dmaengine_pcm_prepare_slave_config(substream, params, &config_fe);
	if (ret) {
		dev_err(dev, "failed to prepare DMA config for Front-End\n");
		return ret;
	}

	ret = dmaengine_slave_config(pair->dma_chan[!dir], &config_fe);
	if (ret) {
		dev_err(dev, "failed to config DMA channel for Front-End\n");
		return ret;
	}

	/* Request and config DMA channel for Back-End */
	dma_cap_zero(mask);
	dma_cap_set(DMA_SLAVE, mask);
	dma_cap_set(DMA_CYCLIC, mask);

	/* Get DMA request of Back-End */
	tmp_chan = dma_request_slave_channel(dev_be, tx ? "tx" : "rx");
	tmp_data = tmp_chan->private;
	pair->dma_data.dma_request = tmp_data->dma_request;
	dma_release_channel(tmp_chan);

	/* Get DMA request of Front-End */
	tmp_chan = fsl_asrc_get_dma_channel(pair, dir);
	tmp_data = tmp_chan->private;
	pair->dma_data.dma_request2 = tmp_data->dma_request;
	pair->dma_data.peripheral_type = tmp_data->peripheral_type;
	pair->dma_data.priority = tmp_data->priority;
	dma_release_channel(tmp_chan);

	pair->dma_chan[dir] = dma_request_channel(mask, filter, &pair->dma_data);
	if (!pair->dma_chan[dir]) {
		dev_err(dev, "failed to request DMA channel for Back-End\n");
		return -EINVAL;
	}

	if (asrc_priv->asrc_width == 16)
		buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
	else
		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;

	config_be.direction = DMA_DEV_TO_DEV;
	config_be.src_addr_width = buswidth;
	config_be.src_maxburst = dma_params_be->maxburst;
	config_be.dst_addr_width = buswidth;
	config_be.dst_maxburst = dma_params_be->maxburst;

	if (tx) {
		config_be.src_addr = asrc_priv->paddr + REG_ASRDO(index);
		config_be.dst_addr = dma_params_be->addr;
	} else {
		config_be.dst_addr = asrc_priv->paddr + REG_ASRDI(index);
		config_be.src_addr = dma_params_be->addr;
	}

	ret = dmaengine_slave_config(pair->dma_chan[dir], &config_be);
	if (ret) {
		dev_err(dev, "failed to config DMA channel for Back-End\n");
		return ret;
	}

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);

	return 0;
}

static int fsl_asrc_dma_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;

	snd_pcm_set_runtime_buffer(substream, NULL);

	if (pair->dma_chan[IN])
		dma_release_channel(pair->dma_chan[IN]);

	if (pair->dma_chan[OUT])
		dma_release_channel(pair->dma_chan[OUT]);

	pair->dma_chan[IN] = NULL;
	pair->dma_chan[OUT] = NULL;

	return 0;
}

static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
	struct device *dev = component->dev;
	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
	struct fsl_asrc_pair *pair;

	pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);
	if (!pair)
		return -ENOMEM;

	pair->asrc_priv = asrc_priv;

	runtime->private_data = pair;

	snd_pcm_hw_constraint_integer(substream->runtime,
				      SNDRV_PCM_HW_PARAM_PERIODS);
	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);

	return 0;
}

static int fsl_asrc_dma_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;
	struct fsl_asrc *asrc_priv;

	if (!pair)
		return 0;

	asrc_priv = pair->asrc_priv;

	if (asrc_priv->pair[pair->index] == pair)
		asrc_priv->pair[pair->index] = NULL;

	kfree(pair);

	return 0;
}

static snd_pcm_uframes_t fsl_asrc_dma_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct fsl_asrc_pair *pair = runtime->private_data;

	return bytes_to_frames(substream->runtime, pair->pos);
}

static const struct snd_pcm_ops fsl_asrc_dma_pcm_ops = {
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= fsl_asrc_dma_hw_params,
	.hw_free	= fsl_asrc_dma_hw_free,
	.trigger	= fsl_asrc_dma_trigger,
	.open		= fsl_asrc_dma_startup,
	.close		= fsl_asrc_dma_shutdown,
	.pointer	= fsl_asrc_dma_pcm_pointer,
};

static int fsl_asrc_dma_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm_substream *substream;
	struct snd_pcm *pcm = rtd->pcm;
	int ret, i;

	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	if (ret) {
		dev_err(card->dev, "failed to set DMA mask\n");
		return ret;
	}

	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) {
		substream = pcm->streams[i].substream;
		if (!substream)
			continue;

		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
				FSL_ASRC_DMABUF_SIZE, &substream->dma_buffer);
		if (ret) {
			dev_err(card->dev, "failed to allocate DMA buffer\n");
			goto err;
		}
	}

	return 0;

err:
	if (--i == 0 && pcm->streams[i].substream)
		snd_dma_free_pages(&pcm->streams[i].substream->dma_buffer);

	return ret;
}

static void fsl_asrc_dma_pcm_free(struct snd_pcm *pcm)
{
	struct snd_pcm_substream *substream;
	int i;

	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) {
		substream = pcm->streams[i].substream;
		if (!substream)
			continue;

		snd_dma_free_pages(&substream->dma_buffer);
		substream->dma_buffer.area = NULL;
		substream->dma_buffer.addr = 0;
	}
}

struct snd_soc_component_driver fsl_asrc_component = {
	.name		= DRV_NAME,
	.ops		= &fsl_asrc_dma_pcm_ops,
	.pcm_new	= fsl_asrc_dma_pcm_new,
	.pcm_free	= fsl_asrc_dma_pcm_free,
};
EXPORT_SYMBOL_GPL(fsl_asrc_component);
Commit	Line	Data
2ba28053 FE	1	// SPDX-License-Identifier: GPL-2.0
	2	//
	3	// Freescale ASRC ALSA SoC Platform (DMA) driver
	4	//
	5	// Copyright (C) 2014 Freescale Semiconductor, Inc.
	6	//
	7	// Author: Nicolin Chen <nicoleotsuka@gmail.com>
3117bb31 NC	8
	9	#include <linux/dma-mapping.h>
	10	#include <linux/module.h>
	11	#include <linux/platform_data/dma-imx.h>
	12	#include <sound/dmaengine_pcm.h>
	13	#include <sound/pcm_params.h>
	14
	15	#include "fsl_asrc.h"
	16
	17	#define FSL_ASRC_DMABUF_SIZE (256 * 1024)
	18
f77bb3b7	19	static const struct snd_pcm_hardware snd_imx_hardware = {
3117bb31 NC	20	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	21	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	22	SNDRV_PCM_INFO_MMAP \|
	23	SNDRV_PCM_INFO_MMAP_VALID \|
	24	SNDRV_PCM_INFO_PAUSE \|
	25	SNDRV_PCM_INFO_RESUME,
	26	.buffer_bytes_max = FSL_ASRC_DMABUF_SIZE,
	27	.period_bytes_min = 128,
	28	.period_bytes_max = 65535, /* Limited by SDMA engine */
	29	.periods_min = 2,
	30	.periods_max = 255,
	31	.fifo_size = 0,
	32	};
	33
	34	static bool filter(struct dma_chan chan, void param)
	35	{
	36	if (!imx_dma_is_general_purpose(chan))
	37	return false;
	38
	39	chan->private = param;
	40
	41	return true;
	42	}
	43
	44	static void fsl_asrc_dma_complete(void *arg)
	45	{
	46	struct snd_pcm_substream *substream = arg;
	47	struct snd_pcm_runtime *runtime = substream->runtime;
	48	struct fsl_asrc_pair *pair = runtime->private_data;
	49
	50	pair->pos += snd_pcm_lib_period_bytes(substream);
	51	if (pair->pos >= snd_pcm_lib_buffer_bytes(substream))
	52	pair->pos = 0;
	53
	54	snd_pcm_period_elapsed(substream);
	55	}
	56
	57	static int fsl_asrc_dma_prepare_and_submit(struct snd_pcm_substream *substream)
	58	{
	59	u8 dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? OUT : IN;
	60	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	61	struct snd_pcm_runtime *runtime = substream->runtime;
	62	struct fsl_asrc_pair *pair = runtime->private_data;
7f110661 KM	63	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
7f110661 KM	64	struct device *dev = component->dev;
3117bb31 NC	65	unsigned long flags = DMA_CTRL_ACK;
	66
	67	/* Prepare and submit Front-End DMA channel */
	68	if (!substream->runtime->no_period_wakeup)
	69	flags \|= DMA_PREP_INTERRUPT;
	70
	71	pair->pos = 0;
	72	pair->desc[!dir] = dmaengine_prep_dma_cyclic(
	73	pair->dma_chan[!dir], runtime->dma_addr,
	74	snd_pcm_lib_buffer_bytes(substream),
	75	snd_pcm_lib_period_bytes(substream),
24dbd9ed	76	dir == OUT ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, flags);
3117bb31 NC	77	if (!pair->desc[!dir]) {
	78	dev_err(dev, "failed to prepare slave DMA for Front-End\n");
	79	return -ENOMEM;
	80	}
	81
	82	pair->desc[!dir]->callback = fsl_asrc_dma_complete;
	83	pair->desc[!dir]->callback_param = substream;
	84
	85	dmaengine_submit(pair->desc[!dir]);
	86
	87	/* Prepare and submit Back-End DMA channel */
	88	pair->desc[dir] = dmaengine_prep_dma_cyclic(
	89	pair->dma_chan[dir], 0xffff, 64, 64, DMA_DEV_TO_DEV, 0);
	90	if (!pair->desc[dir]) {
	91	dev_err(dev, "failed to prepare slave DMA for Back-End\n");
	92	return -ENOMEM;
	93	}
	94
	95	dmaengine_submit(pair->desc[dir]);
	96
	97	return 0;
	98	}
	99
	100	static int fsl_asrc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
	101	{
	102	struct snd_pcm_runtime *runtime = substream->runtime;
	103	struct fsl_asrc_pair *pair = runtime->private_data;
	104	int ret;
	105
	106	switch (cmd) {
	107	case SNDRV_PCM_TRIGGER_START:
	108	case SNDRV_PCM_TRIGGER_RESUME:
	109	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	110	ret = fsl_asrc_dma_prepare_and_submit(substream);
	111	if (ret)
	112	return ret;
	113	dma_async_issue_pending(pair->dma_chan[IN]);
	114	dma_async_issue_pending(pair->dma_chan[OUT]);
	115	break;
	116	case SNDRV_PCM_TRIGGER_STOP:
	117	case SNDRV_PCM_TRIGGER_SUSPEND:
	118	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	119	dmaengine_terminate_all(pair->dma_chan[OUT]);
	120	dmaengine_terminate_all(pair->dma_chan[IN]);
	121	break;
	122	default:
	123	return -EINVAL;
	124	}
	125
	126	return 0;
	127	}
	128
	129	static int fsl_asrc_dma_hw_params(struct snd_pcm_substream *substream,
	130	struct snd_pcm_hw_params *params)
	131	{
	132	enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
	133	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	134	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	135	struct snd_dmaengine_dai_dma_data *dma_params_fe = NULL;
	136	struct snd_dmaengine_dai_dma_data *dma_params_be = NULL;
7f110661	137	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
3117bb31 NC	138	struct snd_pcm_runtime *runtime = substream->runtime;
	139	struct fsl_asrc_pair *pair = runtime->private_data;
	140	struct fsl_asrc *asrc_priv = pair->asrc_priv;
	141	struct dma_slave_config config_fe, config_be;
	142	enum asrc_pair_index index = pair->index;
7f110661	143	struct device *dev = component->dev;
3117bb31 NC	144	int stream = substream->stream;
	145	struct imx_dma_data *tmp_data;
	146	struct snd_soc_dpcm *dpcm;
	147	struct dma_chan *tmp_chan;
	148	struct device *dev_be;
	149	u8 dir = tx ? OUT : IN;
	150	dma_cap_mask_t mask;
	151	int ret;
	152
	153	/* Fetch the Back-End dma_data from DPCM */
8d6258a4	154	for_each_dpcm_be(rtd, stream, dpcm) {
3117bb31 NC	155	struct snd_soc_pcm_runtime *be = dpcm->be;
	156	struct snd_pcm_substream *substream_be;
	157	struct snd_soc_dai *dai = be->cpu_dai;
	158
	159	if (dpcm->fe != rtd)
	160	continue;
	161
	162	substream_be = snd_soc_dpcm_get_substream(be, stream);
	163	dma_params_be = snd_soc_dai_get_dma_data(dai, substream_be);
	164	dev_be = dai->dev;
	165	break;
	166	}
	167
	168	if (!dma_params_be) {
	169	dev_err(dev, "failed to get the substream of Back-End\n");
	170	return -EINVAL;
	171	}
	172
	173	/* Override dma_data of the Front-End and config its dmaengine */
	174	dma_params_fe = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
	175	dma_params_fe->addr = asrc_priv->paddr + REG_ASRDx(!dir, index);
	176	dma_params_fe->maxburst = dma_params_be->maxburst;
	177
	178	pair->dma_chan[!dir] = fsl_asrc_get_dma_channel(pair, !dir);
	179	if (!pair->dma_chan[!dir]) {
	180	dev_err(dev, "failed to request DMA channel\n");
	181	return -EINVAL;
	182	}
	183
	184	memset(&config_fe, 0, sizeof(config_fe));
	185	ret = snd_dmaengine_pcm_prepare_slave_config(substream, params, &config_fe);
	186	if (ret) {
	187	dev_err(dev, "failed to prepare DMA config for Front-End\n");
	188	return ret;
	189	}
	190
	191	ret = dmaengine_slave_config(pair->dma_chan[!dir], &config_fe);
	192	if (ret) {
	193	dev_err(dev, "failed to config DMA channel for Front-End\n");
	194	return ret;
	195	}
	196
	197	/* Request and config DMA channel for Back-End */
	198	dma_cap_zero(mask);
	199	dma_cap_set(DMA_SLAVE, mask);
	200	dma_cap_set(DMA_CYCLIC, mask);
	201
	202	/* Get DMA request of Back-End */
	203	tmp_chan = dma_request_slave_channel(dev_be, tx ? "tx" : "rx");
	204	tmp_data = tmp_chan->private;
	205	pair->dma_data.dma_request = tmp_data->dma_request;
	206	dma_release_channel(tmp_chan);
	207
	208	/* Get DMA request of Front-End */
	209	tmp_chan = fsl_asrc_get_dma_channel(pair, dir);
	210	tmp_data = tmp_chan->private;
	211	pair->dma_data.dma_request2 = tmp_data->dma_request;
	212	pair->dma_data.peripheral_type = tmp_data->peripheral_type;
	213	pair->dma_data.priority = tmp_data->priority;
	214	dma_release_channel(tmp_chan);
	215
	216	pair->dma_chan[dir] = dma_request_channel(mask, filter, &pair->dma_data);
	217	if (!pair->dma_chan[dir]) {
	218	dev_err(dev, "failed to request DMA channel for Back-End\n");
219	return -EINVAL;
220	}
221
222	if (asrc_priv->asrc_width == 16)
223	buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
224	else
225	buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
226
227	config_be.direction = DMA_DEV_TO_DEV;
228	config_be.src_addr_width = buswidth;
229	config_be.src_maxburst = dma_params_be->maxburst;
230	config_be.dst_addr_width = buswidth;
231	config_be.dst_maxburst = dma_params_be->maxburst;
232
233	if (tx) {
234	config_be.src_addr = asrc_priv->paddr + REG_ASRDO(index);
235	config_be.dst_addr = dma_params_be->addr;
236	} else {
237	config_be.dst_addr = asrc_priv->paddr + REG_ASRDI(index);
238	config_be.src_addr = dma_params_be->addr;
239	}
240
241	ret = dmaengine_slave_config(pair->dma_chan[dir], &config_be);
242	if (ret) {
243	dev_err(dev, "failed to config DMA channel for Back-End\n");
244	return ret;
245	}
246
247	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
248
249	return 0;
250	}
251
252	static int fsl_asrc_dma_hw_free(struct snd_pcm_substream *substream)
253	{
254	struct snd_pcm_runtime *runtime = substream->runtime;
255	struct fsl_asrc_pair *pair = runtime->private_data;
256
257	snd_pcm_set_runtime_buffer(substream, NULL);
258
259	if (pair->dma_chan[IN])
260	dma_release_channel(pair->dma_chan[IN]);
261
262	if (pair->dma_chan[OUT])
263	dma_release_channel(pair->dma_chan[OUT]);
264
265	pair->dma_chan[IN] = NULL;
266	pair->dma_chan[OUT] = NULL;
267
268	return 0;
269	}
270
271	static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
272	{
273	struct snd_soc_pcm_runtime *rtd = substream->private_data;
274	struct snd_pcm_runtime *runtime = substream->runtime;
7f110661 KM	275	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
7f110661 KM	276	struct device *dev = component->dev;
3117bb31 NC	277	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
	278	struct fsl_asrc_pair *pair;
	279
	280	pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);
443be77e	281	if (!pair)
3117bb31	282	return -ENOMEM;
3117bb31 NC	283
	284	pair->asrc_priv = asrc_priv;
	285
	286	runtime->private_data = pair;
	287
	288	snd_pcm_hw_constraint_integer(substream->runtime,
	289	SNDRV_PCM_HW_PARAM_PERIODS);
	290	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
	291
	292	return 0;
	293	}
	294
	295	static int fsl_asrc_dma_shutdown(struct snd_pcm_substream *substream)
	296	{
	297	struct snd_pcm_runtime *runtime = substream->runtime;
	298	struct fsl_asrc_pair *pair = runtime->private_data;
6ccf62c7 NC	299	struct fsl_asrc *asrc_priv;
	300
	301	if (!pair)
	302	return 0;
	303
	304	asrc_priv = pair->asrc_priv;
3117bb31	305
6ccf62c7	306	if (asrc_priv->pair[pair->index] == pair)
3117bb31 NC	307	asrc_priv->pair[pair->index] = NULL;
	308
	309	kfree(pair);
	310
	311	return 0;
	312	}
	313
	314	static snd_pcm_uframes_t fsl_asrc_dma_pcm_pointer(struct snd_pcm_substream *substream)
	315	{
	316	struct snd_pcm_runtime *runtime = substream->runtime;
	317	struct fsl_asrc_pair *pair = runtime->private_data;
	318
	319	return bytes_to_frames(substream->runtime, pair->pos);
	320	}
	321
115c7254	322	static const struct snd_pcm_ops fsl_asrc_dma_pcm_ops = {
3117bb31 NC	323	.ioctl = snd_pcm_lib_ioctl,
	324	.hw_params = fsl_asrc_dma_hw_params,
	325	.hw_free = fsl_asrc_dma_hw_free,
	326	.trigger = fsl_asrc_dma_trigger,
	327	.open = fsl_asrc_dma_startup,
	328	.close = fsl_asrc_dma_shutdown,
	329	.pointer = fsl_asrc_dma_pcm_pointer,
	330	};
	331
	332	static int fsl_asrc_dma_pcm_new(struct snd_soc_pcm_runtime *rtd)
	333	{
	334	struct snd_card *card = rtd->card->snd_card;
	335	struct snd_pcm_substream *substream;
	336	struct snd_pcm *pcm = rtd->pcm;
	337	int ret, i;
	338
	339	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	340	if (ret) {
	341	dev_err(card->dev, "failed to set DMA mask\n");
	342	return ret;
	343	}
	344
	345	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) {
	346	substream = pcm->streams[i].substream;
	347	if (!substream)
	348	continue;
	349
	350	ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
	351	FSL_ASRC_DMABUF_SIZE, &substream->dma_buffer);
	352	if (ret) {
	353	dev_err(card->dev, "failed to allocate DMA buffer\n");
	354	goto err;
	355	}
	356	}
	357
	358	return 0;
	359
	360	err:
	361	if (--i == 0 && pcm->streams[i].substream)
	362	snd_dma_free_pages(&pcm->streams[i].substream->dma_buffer);
	363
	364	return ret;
	365	}
	366
	367	static void fsl_asrc_dma_pcm_free(struct snd_pcm *pcm)
	368	{
	369	struct snd_pcm_substream *substream;
	370	int i;
	371
	372	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) {
	373	substream = pcm->streams[i].substream;
	374	if (!substream)
	375	continue;
	376
	377	snd_dma_free_pages(&substream->dma_buffer);
	378	substream->dma_buffer.area = NULL;
	379	substream->dma_buffer.addr = 0;
	380	}
	381	}
	382
7f110661 KM	383	struct snd_soc_component_driver fsl_asrc_component = {
7f110661 KM	384	.name = DRV_NAME,
3117bb31 NC	385	.ops = &fsl_asrc_dma_pcm_ops,
	386	.pcm_new = fsl_asrc_dma_pcm_new,
	387	.pcm_free = fsl_asrc_dma_pcm_free,
	388	};
7f110661	389	EXPORT_SYMBOL_GPL(fsl_asrc_component);