[deliverable/linux.git] / sound / soc / soc-utils.c

/*
 * 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>
 *         
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#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_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 struct snd_pcm_ops dummy_dma_ops = {
	.open		= dummy_dma_open,
	.ioctl		= snd_pcm_lib_ioctl,
};

static struct snd_soc_platform_driver dummy_platform = {
	.ops = &dummy_dma_ops,
};

static struct snd_soc_codec_driver dummy_codec;

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

	ret = snd_soc_register_platform(&pdev->dev, &dummy_platform);
	if (ret < 0) {
		snd_soc_unregister_codec(&pdev->dev);
		return ret;
	}

	return ret;
}

static int snd_soc_dummy_remove(struct platform_device *pdev)
{
	snd_soc_unregister_platform(&pdev->dev);
	snd_soc_unregister_codec(&pdev->dev);

	return 0;
}

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

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_device_unregister(soc_dummy_dev);
	platform_driver_unregister(&soc_dummy_driver);
}
Commit	Line	Data
7aae816d MB	1	/*
	2	* soc-util.c -- ALSA SoC Audio Layer utility functions
	3	*
	4	* Copyright 2009 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	* Liam Girdwood <lrg@slimlogic.co.uk>
	8	*
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*/
	15
848dd8be	16	#include <linux/platform_device.h>
d81a6d71	17	#include <linux/export.h>
7aae816d MB	18	#include <sound/core.h>
	19	#include <sound/pcm.h>
	20	#include <sound/pcm_params.h>
	21	#include <sound/soc.h>
	22
	23	int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
	24	{
	25	return sample_size * channels * tdm_slots;
	26	}
	27	EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
	28
	29	int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
	30	{
	31	int sample_size;
	32
3d8b2ce0 MB	33	sample_size = snd_pcm_format_width(params_format(params));
	34	if (sample_size < 0)
	35	return sample_size;
7aae816d MB	36
	37	return snd_soc_calc_frame_size(sample_size, params_channels(params),
	38	1);
	39	}
	40	EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
	41
c0fa59df MB	42	int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
	43	{
	44	return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
	45	}
	46	EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
	47
7aae816d MB	48	int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
	49	{
	50	int ret;
	51
	52	ret = snd_soc_params_to_frame_size(params);
	53
	54	if (ret > 0)
	55	return ret * params_rate(params);
	56	else
	57	return ret;
	58	}
	59	EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
848dd8be	60
cefcc03f	61	static const struct snd_pcm_hardware dummy_dma_hardware = {
cefcc03f MB	62	/* Random values to keep userspace happy when checking constraints */
	63	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	64	SNDRV_PCM_INFO_BLOCK_TRANSFER,
	65	.buffer_bytes_max = 128*1024,
	66	.period_bytes_min = PAGE_SIZE,
	67	.period_bytes_max = PAGE_SIZE*2,
	68	.periods_min = 2,
	69	.periods_max = 128,
	70	};
	71
	72	static int dummy_dma_open(struct snd_pcm_substream *substream)
	73	{
7f05cc98 LG	74	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	75
	76	/* BE's dont need dummy params */
	77	if (!rtd->dai_link->no_pcm)
	78	snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
cefcc03f MB	79
	80	return 0;
	81	}
	82
	83	static struct snd_pcm_ops dummy_dma_ops = {
	84	.open = dummy_dma_open,
	85	.ioctl = snd_pcm_lib_ioctl,
	86	};
	87
	88	static struct snd_soc_platform_driver dummy_platform = {
	89	.ops = &dummy_dma_ops,
	90	};
848dd8be	91
7aca69f9	92	static struct snd_soc_codec_driver dummy_codec;
60b6f1a1 SS	93
	94	#define STUB_RATES SNDRV_PCM_RATE_8000_192000
	95	#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 \| \
	96	SNDRV_PCM_FMTBIT_U8 \| \
	97	SNDRV_PCM_FMTBIT_S16_LE \| \
	98	SNDRV_PCM_FMTBIT_U16_LE \| \
	99	SNDRV_PCM_FMTBIT_S24_LE \| \
	100	SNDRV_PCM_FMTBIT_U24_LE \| \
	101	SNDRV_PCM_FMTBIT_S32_LE \| \
	102	SNDRV_PCM_FMTBIT_U32_LE \| \
	103	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
d76f4198 AP	104	/*
	105	* The dummy CODEC is only meant to be used in situations where there is no
	106	* actual hardware.
	107	*
	108	* If there is actual hardware even if it does not have a control bus
	109	* the hardware will still have constraints like supported samplerates, etc.
	110	* which should be modelled. And the data flow graph also should be modelled
	111	* using DAPM.
	112	*/
7aca69f9 LG	113	static struct snd_soc_dai_driver dummy_dai = {
7aca69f9 LG	114	.name = "snd-soc-dummy-dai",
60b6f1a1 SS	115	.playback = {
	116	.stream_name = "Playback",
	117	.channels_min = 1,
	118	.channels_max = 384,
	119	.rates = STUB_RATES,
	120	.formats = STUB_FORMATS,
	121	},
	122	.capture = {
	123	.stream_name = "Capture",
	124	.channels_min = 1,
	125	.channels_max = 384,
	126	.rates = STUB_RATES,
	127	.formats = STUB_FORMATS,
	128	},
7aca69f9 LG	129	};
7aca69f9 LG	130
bece9e95 LG	131	int snd_soc_dai_is_dummy(struct snd_soc_dai *dai)
	132	{
	133	if (dai->driver == &dummy_dai)
	134	return 1;
	135	return 0;
	136	}
	137
e51e97ee	138	static int snd_soc_dummy_probe(struct platform_device *pdev)
848dd8be	139	{
7aca69f9 LG	140	int ret;
	141
	142	ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1);
	143	if (ret < 0)
	144	return ret;
	145
	146	ret = snd_soc_register_platform(&pdev->dev, &dummy_platform);
	147	if (ret < 0) {
	148	snd_soc_unregister_codec(&pdev->dev);
	149	return ret;
	150	}
	151
	152	return ret;
848dd8be MB	153	}
848dd8be MB	154
e51e97ee	155	static int snd_soc_dummy_remove(struct platform_device *pdev)
848dd8be MB	156	{
848dd8be MB	157	snd_soc_unregister_platform(&pdev->dev);
7aca69f9	158	snd_soc_unregister_codec(&pdev->dev);
848dd8be MB	159
	160	return 0;
	161	}
	162
	163	static struct platform_driver soc_dummy_driver = {
	164	.driver = {
	165	.name = "snd-soc-dummy",
848dd8be MB	166	},
848dd8be MB	167	.probe = snd_soc_dummy_probe,
e51e97ee	168	.remove = snd_soc_dummy_remove,
848dd8be MB	169	};
	170
	171	static struct platform_device *soc_dummy_dev;
	172
fb257897	173	int __init snd_soc_util_init(void)
848dd8be MB	174	{
	175	int ret;
	176
7d0cd223 UKK	177	soc_dummy_dev =
	178	platform_device_register_simple("snd-soc-dummy", -1, NULL, 0);
	179	if (IS_ERR(soc_dummy_dev))
	180	return PTR_ERR(soc_dummy_dev);
848dd8be MB	181
	182	ret = platform_driver_register(&soc_dummy_driver);
	183	if (ret != 0)
	184	platform_device_unregister(soc_dummy_dev);
	185
	186	return ret;
	187	}
848dd8be	188
fb257897	189	void __exit snd_soc_util_exit(void)
848dd8be MB	190	{
	191	platform_device_unregister(soc_dummy_dev);
	192	platform_driver_unregister(&soc_dummy_driver);
	193	}