[people/ms/linux.git] / sound / arm / pxa2xx-pcm-lib.c

// SPDX-License-Identifier: GPL-2.0-only

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/dma/pxa-dma.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>

static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
	.info			= SNDRV_PCM_INFO_MMAP |
				  SNDRV_PCM_INFO_MMAP_VALID |
				  SNDRV_PCM_INFO_INTERLEAVED |
				  SNDRV_PCM_INFO_PAUSE |
				  SNDRV_PCM_INFO_RESUME,
	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
				  SNDRV_PCM_FMTBIT_S24_LE |
				  SNDRV_PCM_FMTBIT_S32_LE,
	.period_bytes_min	= 32,
	.period_bytes_max	= 8192 - 32,
	.periods_min		= 1,
	.periods_max		= 256,
	.buffer_bytes_max	= 128 * 1024,
	.fifo_size		= 32,
};

int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *params)
{
	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_dmaengine_dai_dma_data *dma_params;
	struct dma_slave_config config;
	int ret;

	dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
	if (!dma_params)
		return 0;

	ret = snd_hwparams_to_dma_slave_config(substream, params, &config);
	if (ret)
		return ret;

	snd_dmaengine_pcm_set_config_from_dai_data(substream,
			snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream),
			&config);

	ret = dmaengine_slave_config(chan, &config);
	if (ret)
		return ret;

	return 0;
}
EXPORT_SYMBOL(pxa2xx_pcm_hw_params);

int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	return snd_dmaengine_pcm_trigger(substream, cmd);
}
EXPORT_SYMBOL(pxa2xx_pcm_trigger);

snd_pcm_uframes_t
pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
{
	return snd_dmaengine_pcm_pointer(substream);
}
EXPORT_SYMBOL(pxa2xx_pcm_pointer);

int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
{
	return 0;
}
EXPORT_SYMBOL(pxa2xx_pcm_prepare);

int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_dmaengine_dai_dma_data *dma_params;
	int ret;

	runtime->hw = pxa2xx_pcm_hardware;

	dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
	if (!dma_params)
		return 0;

	/*
	 * For mysterious reasons (and despite what the manual says)
	 * playback samples are lost if the DMA count is not a multiple
	 * of the DMA burst size.  Let's add a rule to enforce that.
	 */
	ret = snd_pcm_hw_constraint_step(runtime, 0,
		SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	if (ret)
		return ret;

	ret = snd_pcm_hw_constraint_step(runtime, 0,
		SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
	if (ret)
		return ret;

	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0)
		return ret;

	return snd_dmaengine_pcm_open(
		substream, dma_request_slave_channel(asoc_rtd_to_cpu(rtd, 0)->dev,
						     dma_params->chan_name));
}
EXPORT_SYMBOL(pxa2xx_pcm_open);

int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
{
	return snd_dmaengine_pcm_close_release_chan(substream);
}
EXPORT_SYMBOL(pxa2xx_pcm_close);

int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm)
{
	size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;

	return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
					    pcm->card->dev, size);
}
EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);

int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
		       struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret;

	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	return pxa2xx_pcm_preallocate_dma_buffer(pcm);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_new);

int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
			struct snd_pcm_substream *substream)
{
	return pxa2xx_pcm_open(substream);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_open);

int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
			 struct snd_pcm_substream *substream)
{
	return pxa2xx_pcm_close(substream);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_close);

int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{
	return pxa2xx_pcm_hw_params(substream, params);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_params);

int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream)
{
	return pxa2xx_pcm_prepare(substream);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_prepare);

int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream, int cmd)
{
	return pxa2xx_pcm_trigger(substream, cmd);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_trigger);

snd_pcm_uframes_t
pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
		       struct snd_pcm_substream *substream)
{
	return pxa2xx_pcm_pointer(substream);
}
EXPORT_SYMBOL(pxa2xx_soc_pcm_pointer);

MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("Intel PXA2xx sound library");
MODULE_LICENSE("GPL");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
a6d77317	2
5a0e3ad6	3	#include <linux/slab.h>
a6d77317 DB	4	#include <linux/module.h>
a6d77317 DB	5	#include <linux/dma-mapping.h>
d65a1458	6	#include <linux/dmaengine.h>
58ceb57e	7	#include <linux/dma/pxa-dma.h>
a6d77317 DB	8
	9	#include <sound/core.h>
	10	#include <sound/pcm.h>
	11	#include <sound/pcm_params.h>
	12	#include <sound/pxa2xx-lib.h>
d65a1458	13	#include <sound/dmaengine_pcm.h>
a6d77317	14
a6d77317 DB	15	static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
	16	.info = SNDRV_PCM_INFO_MMAP \|
	17	SNDRV_PCM_INFO_MMAP_VALID \|
	18	SNDRV_PCM_INFO_INTERLEAVED \|
	19	SNDRV_PCM_INFO_PAUSE \|
	20	SNDRV_PCM_INFO_RESUME,
	21	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
456ec808 DM	22	SNDRV_PCM_FMTBIT_S24_LE \|
456ec808 DM	23	SNDRV_PCM_FMTBIT_S32_LE,
a6d77317 DB	24	.period_bytes_min = 32,
	25	.period_bytes_max = 8192 - 32,
	26	.periods_min = 1,
58ceb57e	27	.periods_max = 256,
a6d77317 DB	28	.buffer_bytes_max = 128 * 1024,
	29	.fifo_size = 32,
	30	};
	31
a7160670 DM	32	int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
a7160670 DM	33	struct snd_pcm_hw_params *params)
a6d77317	34	{
58ceb57e DM	35	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
	36	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	37	struct snd_dmaengine_dai_dma_data *dma_params;
	38	struct dma_slave_config config;
	39	int ret;
	40
575be883	41	dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
58ceb57e DM	42	if (!dma_params)
58ceb57e DM	43	return 0;
d65a1458	44
58ceb57e DM	45	ret = snd_hwparams_to_dma_slave_config(substream, params, &config);
	46	if (ret)
	47	return ret;
d65a1458	48
58ceb57e	49	snd_dmaengine_pcm_set_config_from_dai_data(substream,
575be883	50	snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream),
58ceb57e	51	&config);
a6d77317	52
58ceb57e DM	53	ret = dmaengine_slave_config(chan, &config);
	54	if (ret)
	55	return ret;
a6d77317	56
a6d77317 DB	57	return 0;
a6d77317 DB	58	}
a7160670	59	EXPORT_SYMBOL(pxa2xx_pcm_hw_params);
a6d77317	60
a6d77317 DB	61	int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
a6d77317 DB	62	{
58ceb57e	63	return snd_dmaengine_pcm_trigger(substream, cmd);
a6d77317 DB	64	}
	65	EXPORT_SYMBOL(pxa2xx_pcm_trigger);
	66
	67	snd_pcm_uframes_t
	68	pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
	69	{
58ceb57e	70	return snd_dmaengine_pcm_pointer(substream);
a6d77317 DB	71	}
	72	EXPORT_SYMBOL(pxa2xx_pcm_pointer);
	73
a7160670	74	int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
a6d77317	75	{
a6d77317 DB	76	return 0;
a6d77317 DB	77	}
a7160670	78	EXPORT_SYMBOL(pxa2xx_pcm_prepare);
a6d77317	79
a7160670	80	int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
a6d77317	81	{
58ceb57e	82	struct snd_soc_pcm_runtime *rtd = substream->private_data;
a6d77317	83	struct snd_pcm_runtime *runtime = substream->runtime;
58ceb57e	84	struct snd_dmaengine_dai_dma_data *dma_params;
a6d77317 DB	85	int ret;
	86
	87	runtime->hw = pxa2xx_pcm_hardware;
	88
575be883	89	dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
58ceb57e DM	90	if (!dma_params)
	91	return 0;
	92
a6d77317 DB	93	/*
	94	* For mysterious reasons (and despite what the manual says)
	95	* playback samples are lost if the DMA count is not a multiple
	96	* of the DMA burst size. Let's add a rule to enforce that.
	97	*/
	98	ret = snd_pcm_hw_constraint_step(runtime, 0,
	99	SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	100	if (ret)
58ceb57e	101	return ret;
a6d77317 DB	102
	103	ret = snd_pcm_hw_constraint_step(runtime, 0,
	104	SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
	105	if (ret)
58ceb57e	106	return ret;
a6d77317 DB	107
	108	ret = snd_pcm_hw_constraint_integer(runtime,
	109	SNDRV_PCM_HW_PARAM_PERIODS);
	110	if (ret < 0)
58ceb57e	111	return ret;
a6d77317	112
8f54061d	113	return snd_dmaengine_pcm_open(
575be883	114	substream, dma_request_slave_channel(asoc_rtd_to_cpu(rtd, 0)->dev,
8f54061d	115	dma_params->chan_name));
a6d77317	116	}
a7160670	117	EXPORT_SYMBOL(pxa2xx_pcm_open);
a6d77317	118
a7160670	119	int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
a6d77317	120	{
58ceb57e	121	return snd_dmaengine_pcm_close_release_chan(substream);
a6d77317	122	}
a7160670	123	EXPORT_SYMBOL(pxa2xx_pcm_close);
a6d77317	124
7f2da3d7	125	int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm)
a6d77317	126	{
a6d77317	127	size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
a6d77317	128
7f2da3d7 TI	129	return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
7f2da3d7 TI	130	pcm->card->dev, size);
f8772e17	131	}
7f2da3d7	132	EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
f8772e17 KM	133
	134	int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
	135	struct snd_soc_pcm_runtime *rtd)
7afd1b0b DM	136	{
	137	struct snd_card *card = rtd->card->snd_card;
	138	struct snd_pcm *pcm = rtd->pcm;
	139	int ret;
	140
	141	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	142	if (ret)
	143	return ret;
	144
7f2da3d7	145	return pxa2xx_pcm_preallocate_dma_buffer(pcm);
7afd1b0b DM	146	}
	147	EXPORT_SYMBOL(pxa2xx_soc_pcm_new);
	148
f8772e17 KM	149	int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
	150	struct snd_pcm_substream *substream)
	151	{
	152	return pxa2xx_pcm_open(substream);
	153	}
	154	EXPORT_SYMBOL(pxa2xx_soc_pcm_open);
	155
	156	int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
	157	struct snd_pcm_substream *substream)
	158	{
	159	return pxa2xx_pcm_close(substream);
	160	}
	161	EXPORT_SYMBOL(pxa2xx_soc_pcm_close);
	162
	163	int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
	164	struct snd_pcm_substream *substream,
	165	struct snd_pcm_hw_params *params)
	166	{
	167	return pxa2xx_pcm_hw_params(substream, params);
	168	}
	169	EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_params);
	170
f8772e17 KM	171	int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
	172	struct snd_pcm_substream *substream)
	173	{
	174	return pxa2xx_pcm_prepare(substream);
	175	}
	176	EXPORT_SYMBOL(pxa2xx_soc_pcm_prepare);
	177
	178	int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
	179	struct snd_pcm_substream *substream, int cmd)
	180	{
	181	return pxa2xx_pcm_trigger(substream, cmd);
	182	}
	183	EXPORT_SYMBOL(pxa2xx_soc_pcm_trigger);
	184
	185	snd_pcm_uframes_t
	186	pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
	187	struct snd_pcm_substream *substream)
	188	{
	189	return pxa2xx_pcm_pointer(substream);
	190	}
	191	EXPORT_SYMBOL(pxa2xx_soc_pcm_pointer);
	192
a6d77317 DB	193	MODULE_AUTHOR("Nicolas Pitre");
	194	MODULE_DESCRIPTION("Intel PXA2xx sound library");
	195	MODULE_LICENSE("GPL");