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

// SPDX-License-Identifier: GPL-2.0+
//
// soc-util.c  --  ALSA SoC Audio Layer utility functions
//
// Copyright 2009 Wolfson Microelectronics PLC.
//
// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
//         Liam Girdwood <lrg@slimlogic.co.uk>

#include <linux/platform_device.h>
#include <linux/export.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
{
	return sample_size * channels * tdm_slots;
}
EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);

int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
{
	int sample_size;

	sample_size = snd_pcm_format_width(params_format(params));
	if (sample_size < 0)
		return sample_size;

	return snd_soc_calc_frame_size(sample_size, params_channels(params),
				       1);
}
EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);

int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
{
	return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
}
EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);

int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
{
	int ret;

	ret = snd_soc_params_to_frame_size(params);

	if (ret > 0)
		return ret * params_rate(params);
	else
		return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);

static const struct snd_pcm_hardware dummy_dma_hardware = {
	/* Random values to keep userspace happy when checking constraints */
	.info			= SNDRV_PCM_INFO_INTERLEAVED |
				  SNDRV_PCM_INFO_BLOCK_TRANSFER,
	.buffer_bytes_max	= 128*1024,
	.period_bytes_min	= PAGE_SIZE,
	.period_bytes_max	= PAGE_SIZE*2,
	.periods_min		= 2,
	.periods_max		= 128,
};

static int dummy_dma_open(struct snd_soc_component *component,
			  struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	/* BE's dont need dummy params */
	if (!rtd->dai_link->no_pcm)
		snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);

	return 0;
}

static const struct snd_soc_component_driver dummy_platform = {
	.open		= dummy_dma_open,
};

static const struct snd_soc_component_driver dummy_codec = {
	.idle_bias_on		= 1,
	.use_pmdown_time	= 1,
	.endianness		= 1,
	.non_legacy_dai_naming	= 1,
};

#define STUB_RATES	SNDRV_PCM_RATE_8000_192000
#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S8 | \
			SNDRV_PCM_FMTBIT_U8 | \
			SNDRV_PCM_FMTBIT_S16_LE | \
			SNDRV_PCM_FMTBIT_U16_LE | \
			SNDRV_PCM_FMTBIT_S24_LE | \
			SNDRV_PCM_FMTBIT_U24_LE | \
			SNDRV_PCM_FMTBIT_S32_LE | \
			SNDRV_PCM_FMTBIT_U32_LE | \
			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
/*
 * The dummy CODEC is only meant to be used in situations where there is no
 * actual hardware.
 *
 * If there is actual hardware even if it does not have a control bus
 * the hardware will still have constraints like supported samplerates, etc.
 * which should be modelled. And the data flow graph also should be modelled
 * using DAPM.
 */
static struct snd_soc_dai_driver dummy_dai = {
	.name = "snd-soc-dummy-dai",
	.playback = {
		.stream_name	= "Playback",
		.channels_min	= 1,
		.channels_max	= 384,
		.rates		= STUB_RATES,
		.formats	= STUB_FORMATS,
	},
	.capture = {
		.stream_name	= "Capture",
		.channels_min	= 1,
		.channels_max	= 384,
		.rates = STUB_RATES,
		.formats = STUB_FORMATS,
	 },
};

int snd_soc_dai_is_dummy(struct snd_soc_dai *dai)
{
	if (dai->driver == &dummy_dai)
		return 1;
	return 0;
}

static int snd_soc_dummy_probe(struct platform_device *pdev)
{
	int ret;

	ret = devm_snd_soc_register_component(&pdev->dev,
					      &dummy_codec, &dummy_dai, 1);
	if (ret < 0)
		return ret;

	ret = devm_snd_soc_register_component(&pdev->dev, &dummy_platform,
					      NULL, 0);

	return ret;
}

static struct platform_driver soc_dummy_driver = {
	.driver = {
		.name = "snd-soc-dummy",
	},
	.probe = snd_soc_dummy_probe,
};

static struct platform_device *soc_dummy_dev;

int __init snd_soc_util_init(void)
{
	int ret;

	soc_dummy_dev =
		platform_device_register_simple("snd-soc-dummy", -1, NULL, 0);
	if (IS_ERR(soc_dummy_dev))
		return PTR_ERR(soc_dummy_dev);

	ret = platform_driver_register(&soc_dummy_driver);
	if (ret != 0)
		platform_device_unregister(soc_dummy_dev);

	return ret;
}

void __exit snd_soc_util_exit(void)
{
	platform_driver_unregister(&soc_dummy_driver);
	platform_device_unregister(soc_dummy_dev);
}
Commit	Line	Data
632628df KM	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// soc-util.c -- ALSA SoC Audio Layer utility functions
	4	//
	5	// Copyright 2009 Wolfson Microelectronics PLC.
	6	//
	7	// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	8	// Liam Girdwood <lrg@slimlogic.co.uk>
7aae816d	9
848dd8be	10	#include <linux/platform_device.h>
d81a6d71	11	#include <linux/export.h>
7aae816d MB	12	#include <sound/core.h>
	13	#include <sound/pcm.h>
	14	#include <sound/pcm_params.h>
	15	#include <sound/soc.h>
	16
	17	int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
	18	{
	19	return sample_size * channels * tdm_slots;
	20	}
	21	EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
	22
	23	int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
	24	{
	25	int sample_size;
	26
3d8b2ce0 MB	27	sample_size = snd_pcm_format_width(params_format(params));
	28	if (sample_size < 0)
	29	return sample_size;
7aae816d MB	30
	31	return snd_soc_calc_frame_size(sample_size, params_channels(params),
	32	1);
	33	}
	34	EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
	35
c0fa59df MB	36	int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
	37	{
	38	return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
	39	}
	40	EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
	41
7aae816d MB	42	int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
	43	{
	44	int ret;
	45
	46	ret = snd_soc_params_to_frame_size(params);
	47
	48	if (ret > 0)
	49	return ret * params_rate(params);
	50	else
	51	return ret;
	52	}
	53	EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
848dd8be	54
cefcc03f	55	static const struct snd_pcm_hardware dummy_dma_hardware = {
cefcc03f MB	56	/* Random values to keep userspace happy when checking constraints */
	57	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	58	SNDRV_PCM_INFO_BLOCK_TRANSFER,
	59	.buffer_bytes_max = 128*1024,
	60	.period_bytes_min = PAGE_SIZE,
	61	.period_bytes_max = PAGE_SIZE*2,
	62	.periods_min = 2,
	63	.periods_max = 128,
	64	};
	65
a49e460f KM	66	static int dummy_dma_open(struct snd_soc_component *component,
a49e460f KM	67	struct snd_pcm_substream *substream)
cefcc03f	68	{
7f05cc98 LG	69	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	70
	71	/* BE's dont need dummy params */
	72	if (!rtd->dai_link->no_pcm)
	73	snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
cefcc03f MB	74
	75	return 0;
	76	}
	77
2d59ebd3	78	static const struct snd_soc_component_driver dummy_platform = {
a49e460f	79	.open = dummy_dma_open,
cefcc03f	80	};
848dd8be	81
03a0dded KM	82	static const struct snd_soc_component_driver dummy_codec = {
	83	.idle_bias_on = 1,
	84	.use_pmdown_time = 1,
	85	.endianness = 1,
	86	.non_legacy_dai_naming = 1,
	87	};
60b6f1a1 SS	88
	89	#define STUB_RATES SNDRV_PCM_RATE_8000_192000
	90	#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 \| \
	91	SNDRV_PCM_FMTBIT_U8 \| \
	92	SNDRV_PCM_FMTBIT_S16_LE \| \
	93	SNDRV_PCM_FMTBIT_U16_LE \| \
	94	SNDRV_PCM_FMTBIT_S24_LE \| \
	95	SNDRV_PCM_FMTBIT_U24_LE \| \
	96	SNDRV_PCM_FMTBIT_S32_LE \| \
	97	SNDRV_PCM_FMTBIT_U32_LE \| \
	98	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
d76f4198 AP	99	/*
	100	* The dummy CODEC is only meant to be used in situations where there is no
	101	* actual hardware.
	102	*
	103	* If there is actual hardware even if it does not have a control bus
	104	* the hardware will still have constraints like supported samplerates, etc.
	105	* which should be modelled. And the data flow graph also should be modelled
	106	* using DAPM.
	107	*/
7aca69f9 LG	108	static struct snd_soc_dai_driver dummy_dai = {
7aca69f9 LG	109	.name = "snd-soc-dummy-dai",
60b6f1a1 SS	110	.playback = {
	111	.stream_name = "Playback",
	112	.channels_min = 1,
	113	.channels_max = 384,
	114	.rates = STUB_RATES,
	115	.formats = STUB_FORMATS,
	116	},
	117	.capture = {
	118	.stream_name = "Capture",
	119	.channels_min = 1,
	120	.channels_max = 384,
	121	.rates = STUB_RATES,
	122	.formats = STUB_FORMATS,
	123	},
7aca69f9 LG	124	};
7aca69f9 LG	125
bece9e95 LG	126	int snd_soc_dai_is_dummy(struct snd_soc_dai *dai)
	127	{
	128	if (dai->driver == &dummy_dai)
	129	return 1;
	130	return 0;
	131	}
	132
e51e97ee	133	static int snd_soc_dummy_probe(struct platform_device *pdev)
848dd8be	134	{
7aca69f9 LG	135	int ret;
7aca69f9 LG	136
03a0dded KM	137	ret = devm_snd_soc_register_component(&pdev->dev,
03a0dded KM	138	&dummy_codec, &dummy_dai, 1);
7aca69f9 LG	139	if (ret < 0)
	140	return ret;
	141
2d59ebd3 KM	142	ret = devm_snd_soc_register_component(&pdev->dev, &dummy_platform,
2d59ebd3 KM	143	NULL, 0);
7aca69f9 LG	144
7aca69f9 LG	145	return ret;
848dd8be MB	146	}
848dd8be MB	147
848dd8be MB	148	static struct platform_driver soc_dummy_driver = {
	149	.driver = {
	150	.name = "snd-soc-dummy",
848dd8be MB	151	},
848dd8be MB	152	.probe = snd_soc_dummy_probe,
848dd8be MB	153	};
	154
	155	static struct platform_device *soc_dummy_dev;
	156
fb257897	157	int __init snd_soc_util_init(void)
848dd8be MB	158	{
	159	int ret;
	160
7d0cd223 UKK	161	soc_dummy_dev =
	162	platform_device_register_simple("snd-soc-dummy", -1, NULL, 0);
	163	if (IS_ERR(soc_dummy_dev))
	164	return PTR_ERR(soc_dummy_dev);
848dd8be MB	165
	166	ret = platform_driver_register(&soc_dummy_driver);
	167	if (ret != 0)
	168	platform_device_unregister(soc_dummy_dev);
	169
	170	return ret;
	171	}
848dd8be	172
fb257897	173	void __exit snd_soc_util_exit(void)
848dd8be	174	{
848dd8be	175	platform_driver_unregister(&soc_dummy_driver);
b66c9b91	176	platform_device_unregister(soc_dummy_dev);
848dd8be	177	}