Version: v4.11.2

linux/sound/soc/soc-utils.c

    1 
    2 
    3 
    4 
    5 
    6 
    7 
    8 
    9 
   10 
   11 
   12 
   13 
   14 
   15 
   16 
   17 
   18 
   19 
   20 
   21 
   22 
   23 
   24 
   25 
   26 
   27 
   28 
   29 
   30 
   31 
   32 
   33 
   34 
   35 
   36 
   37 
   38 
   39 
   40 
   41 
   42 
   43 
   44 
   45 
   46 
   47 
   48 
   49 
   50 
   51 
   52 
   53 
   54 
   55 
   56 
   57 
   58 
   59 
   60 
   61 
   62 
   63 
   64 
   65 
   66 
   67 
   68 
   69 
   70 
   71 
   72 
   73 
   74 
   75 
   76 
   77 
   78 
   79 
   80 
   81 
   82 
   83 
   84 
   85 
   86 
   87 
   88 
   89 
   90 
   91 
   92 
   93 
   94 
   95 
   96 
   97 
   98 
   99 
  100 
  101 
  102 
  103 
  104 
  105 
  106 
  107 
  108 
  109 
  110 
  111 
  112 
  113 
  114 
  115 
  116 
  117 
  118 
  119 
  120 
  121 
  122 
  123 
  124 
  125 
  126 
  127 
  128 
  129 
  130 
  131 
  132 
  133 
  134 
  135 
  136 
  137 
  138 
  139 
  140 
  141 
  142 
  143 
  144 
  145 
  146 
  147 
  148 
  149 
  150 
  151 
  152 
  153 
  154 
  155 
  156 
  157 
  158 
  159 
  160 
  161 
  162 
  163 
  164 
  165 
  166 
  167 
  168 
  169 
  170 
  171 
  172 
  173 
  174 
  175 
  176 
  177 
  178 
  179 
  180 
  181 
  182 
  183 
  184 
  185 
  186 
  187 
  188 
  189 
  190 
  191 
  192 
  193 
  194 
  195 
  196 
  197 
  198 
  199 
  200 
  201 
  202 
  203 
  204 
  205 
  206 
  207 
  208 
  209 
  210 
  211 
  212 
  213 
  214 
  215 
  216 
  217 
  218 
  219 
  220 
  221 
  222 
  223 
  224 
  225 
  226 
  227 
  228 
  229 
  230 
  231 
  232 
  233 
  234 
  235 
  236 
  237 
  238 
  239 
  240 
  241 
  242 
  243 
  244 
  245 
  246 
  247 
  248 
  249 
  250 
  251 
  252 
  253 
  254 
  255 
  256 
  257 
  258 
  259 
  260 
  261 
  262 
  263 
  264 
  265 
  266 
  267 
  268 
  269 
  270 
  271 
  272 
  273 
  274 
  275 
  276 
  277 
  278 
  279 
  280 
  281 
  282 
  283 
  284 
  285 
  286 
  287 
  288 
  289 
  290 
  291 
  292 
  293 
  294 
  295 
  296 
  297 
  298 
  299 
  300 
  301 
  302 
  303 
  304 
  305 
  306 
  307 
  308 
  309 
  310 
  311 
  312 
  313 
  314 
  315 
  316 
  317 
  318 
  319 
  320 
  321 
  322 
  323 
  324 
  325 
  326 
  327 
  328 
  329 
  330 
  331 
  332 
  333 
  334 
  335 
  336 
  337 
  338 
  339 
  340 
  341 
  342 
  343 
  344 
  345 
  346 
  347 
  348 
  349 
  350 
  351 
  352 
  353 
  354 
  355 
  356 
  357 
  358 
  359 
  360 
  361 
  362 
  363 
  364 
  365 
  366 
  367 
  368 
  369 
  370 
  371 
  372 
  373 
  374 
  375 
  376 
  377 
  378 
  379 
  380 
  381 
  382 
  383 
  384 
  385 
  386 
  387 
  388 
  389 
  390 
  391 
  392 
/*
 * 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);

int snd_soc_component_enable_pin(struct snd_soc_component *component,
				 const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_enable_pin(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_enable_pin(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_enable_pin);

int snd_soc_component_enable_pin_unlocked(struct snd_soc_component *component,
					  const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_enable_pin_unlocked(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_enable_pin_unlocked(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_enable_pin_unlocked);

int snd_soc_component_disable_pin(struct snd_soc_component *component,
				  const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_disable_pin(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_disable_pin(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_disable_pin);

int snd_soc_component_disable_pin_unlocked(struct snd_soc_component *component,
					   const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_disable_pin_unlocked(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_disable_pin_unlocked(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_disable_pin_unlocked);

int snd_soc_component_nc_pin(struct snd_soc_component *component,
			     const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_nc_pin(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_nc_pin(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_nc_pin);

int snd_soc_component_nc_pin_unlocked(struct snd_soc_component *component,
				      const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_nc_pin_unlocked(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_nc_pin_unlocked(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_nc_pin_unlocked);

int snd_soc_component_get_pin_status(struct snd_soc_component *component,
				     const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_get_pin_status(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_get_pin_status(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_get_pin_status);

int snd_soc_component_force_enable_pin(struct snd_soc_component *component,
				       const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_force_enable_pin(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_force_enable_pin(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_force_enable_pin);

int snd_soc_component_force_enable_pin_unlocked(
					struct snd_soc_component *component,
					const char *pin)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	char *full_name;
	int ret;

	if (!component->name_prefix)
		return snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);

	full_name = kasprintf(GFP_KERNEL, "%s %s", component->name_prefix, pin);
	if (!full_name)
		return -ENOMEM;

	ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, full_name);
	kfree(full_name);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_component_force_enable_pin_unlocked);

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 const 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);
}

This page was automatically generated by Elixir 0.1.2 (source)  •  Please report bugs by mail or directly through the issue tracker.