[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 = {
	.formats		= 0xffffffff,
	.channels_min		= 1,
	.channels_max		= UINT_MAX,

	/* 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)
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,
	 },
};

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",
		.owner = THIS_MODULE,
	},
	.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 MB	61	static const struct snd_pcm_hardware dummy_dma_hardware = {
	62	.formats = 0xffffffff,
	63	.channels_min = 1,
	64	.channels_max = UINT_MAX,
	65
	66	/* Random values to keep userspace happy when checking constraints */
	67	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	68	SNDRV_PCM_INFO_BLOCK_TRANSFER,
	69	.buffer_bytes_max = 128*1024,
	70	.period_bytes_min = PAGE_SIZE,
	71	.period_bytes_max = PAGE_SIZE*2,
	72	.periods_min = 2,
	73	.periods_max = 128,
	74	};
	75
	76	static int dummy_dma_open(struct snd_pcm_substream *substream)
	77	{
7f05cc98 LG	78	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	79
	80	/* BE's dont need dummy params */
	81	if (!rtd->dai_link->no_pcm)
	82	snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
cefcc03f MB	83
	84	return 0;
	85	}
	86
	87	static struct snd_pcm_ops dummy_dma_ops = {
	88	.open = dummy_dma_open,
	89	.ioctl = snd_pcm_lib_ioctl,
	90	};
	91
	92	static struct snd_soc_platform_driver dummy_platform = {
	93	.ops = &dummy_dma_ops,
	94	};
848dd8be	95
7aca69f9	96	static struct snd_soc_codec_driver dummy_codec;
60b6f1a1 SS	97
	98	#define STUB_RATES SNDRV_PCM_RATE_8000_192000
	99	#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 \| \
	100	SNDRV_PCM_FMTBIT_U8 \| \
	101	SNDRV_PCM_FMTBIT_S16_LE \| \
	102	SNDRV_PCM_FMTBIT_U16_LE \| \
	103	SNDRV_PCM_FMTBIT_S24_LE \| \
	104	SNDRV_PCM_FMTBIT_U24_LE \| \
	105	SNDRV_PCM_FMTBIT_S32_LE \| \
	106	SNDRV_PCM_FMTBIT_U32_LE \| \
	107	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
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
e51e97ee	126	static int snd_soc_dummy_probe(struct platform_device *pdev)
848dd8be	127	{
7aca69f9 LG	128	int ret;
	129
	130	ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1);
	131	if (ret < 0)
	132	return ret;
	133
	134	ret = snd_soc_register_platform(&pdev->dev, &dummy_platform);
	135	if (ret < 0) {
	136	snd_soc_unregister_codec(&pdev->dev);
	137	return ret;
	138	}
	139
	140	return ret;
848dd8be MB	141	}
848dd8be MB	142
e51e97ee	143	static int snd_soc_dummy_remove(struct platform_device *pdev)
848dd8be MB	144	{
848dd8be MB	145	snd_soc_unregister_platform(&pdev->dev);
7aca69f9	146	snd_soc_unregister_codec(&pdev->dev);
848dd8be MB	147
	148	return 0;
	149	}
	150
	151	static struct platform_driver soc_dummy_driver = {
	152	.driver = {
	153	.name = "snd-soc-dummy",
	154	.owner = THIS_MODULE,
	155	},
	156	.probe = snd_soc_dummy_probe,
e51e97ee	157	.remove = snd_soc_dummy_remove,
848dd8be MB	158	};
	159
	160	static struct platform_device *soc_dummy_dev;
	161
fb257897	162	int __init snd_soc_util_init(void)
848dd8be MB	163	{
	164	int ret;
	165
7d0cd223 UKK	166	soc_dummy_dev =
	167	platform_device_register_simple("snd-soc-dummy", -1, NULL, 0);
	168	if (IS_ERR(soc_dummy_dev))
	169	return PTR_ERR(soc_dummy_dev);
848dd8be MB	170
	171	ret = platform_driver_register(&soc_dummy_driver);
	172	if (ret != 0)
	173	platform_device_unregister(soc_dummy_dev);
	174
	175	return ret;
	176	}
848dd8be	177
fb257897	178	void __exit snd_soc_util_exit(void)
848dd8be MB	179	{
	180	platform_device_unregister(soc_dummy_dev);
	181	platform_driver_unregister(&soc_dummy_driver);
	182	}