LXR linux/sound/soc/codecs/dmic.c

   1/*
   2 * dmic.c  --  SoC audio for Generic Digital MICs
   3 *
   4 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * version 2 as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful, but
  11 * WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 * General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18 * 02110-1301 USA
  19 *
  20 */
  21
  22#include <linux/platform_device.h>
  23#include <linux/slab.h>
  24#include <linux/module.h>
  25#include <sound/core.h>
  26#include <sound/pcm.h>
  27#include <sound/soc.h>
  28#include <sound/soc-dapm.h>
  29
  30static struct snd_soc_dai_driver dmic_dai = {
  31        .name = "dmic-hifi",
  32        .capture = {
  33                .stream_name = "Capture",
  34                .channels_min = 1,
  35                .channels_max = 8,
  36                .rates = SNDRV_PCM_RATE_CONTINUOUS,
  37                .formats = SNDRV_PCM_FMTBIT_S32_LE
  38                        | SNDRV_PCM_FMTBIT_S24_LE
  39                        | SNDRV_PCM_FMTBIT_S16_LE,
  40        },
  41};
  42
  43static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
  44        SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0,
  45                             SND_SOC_NOPM, 0, 0),
  46        SND_SOC_DAPM_INPUT("DMic"),
  47};
  48
  49static const struct snd_soc_dapm_route intercon[] = {
  50        {"DMIC AIF", NULL, "DMic"},
  51};
  52
  53static struct snd_soc_codec_driver soc_dmic = {
  54        .dapm_widgets = dmic_dapm_widgets,
  55        .num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets),
  56        .dapm_routes = intercon,
  57        .num_dapm_routes = ARRAY_SIZE(intercon),
  58};
  59
  60static int dmic_dev_probe(struct platform_device *pdev)
  61{
  62        return snd_soc_register_codec(&pdev->dev,
  63                        &soc_dmic, &dmic_dai, 1);
  64}
  65
  66static int dmic_dev_remove(struct platform_device *pdev)
  67{
  68        snd_soc_unregister_codec(&pdev->dev);
  69        return 0;
  70}
  71
  72MODULE_ALIAS("platform:dmic-codec");
  73
  74static struct platform_driver dmic_driver = {
  75        .driver = {
  76                .name = "dmic-codec",
  77        },
  78        .probe = dmic_dev_probe,
  79        .remove = dmic_dev_remove,
  80};
  81
  82module_platform_driver(dmic_driver);
  83
  84MODULE_DESCRIPTION("Generic DMIC driver");
  85MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
  86MODULE_LICENSE("GPL");
  87