LXR linux/sound/soc/codecs/ak4554.c

   1/*
   2 * ak4554.c
   3 *
   4 * Copyright (C) 2013 Renesas Solutions Corp.
   5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#include <linux/module.h>
  13#include <sound/soc.h>
  14
  15/*
  16 * ak4554 is very simple DA/AD converter which has no setting register.
  17 *
  18 * CAUTION
  19 *
  20 * ak4554 playback format is SND_SOC_DAIFMT_RIGHT_J,
  21 * and,   capture  format is SND_SOC_DAIFMT_LEFT_J
  22 * on same bit clock, LR clock.
  23 * But, this driver doesn't have snd_soc_dai_ops :: set_fmt
  24 *
  25 * CPU/Codec DAI image
  26 *
  27 * CPU-DAI1 (plaback only fmt = RIGHT_J) --+-- ak4554
  28 *                                         |
  29 * CPU-DAI2 (capture only fmt = LEFT_J) ---+
  30 */
  31
  32static const struct snd_soc_dapm_widget ak4554_dapm_widgets[] = {
  33SND_SOC_DAPM_INPUT("AINL"),
  34SND_SOC_DAPM_INPUT("AINR"),
  35
  36SND_SOC_DAPM_OUTPUT("AOUTL"),
  37SND_SOC_DAPM_OUTPUT("AOUTR"),
  38};
  39
  40static const struct snd_soc_dapm_route ak4554_dapm_routes[] = {
  41        { "Capture", NULL, "AINL" },
  42        { "Capture", NULL, "AINR" },
  43
  44        { "AOUTL", NULL, "Playback" },
  45        { "AOUTR", NULL, "Playback" },
  46};
  47
  48static struct snd_soc_dai_driver ak4554_dai = {
  49        .name = "ak4554-hifi",
  50        .playback = {
  51                .stream_name = "Playback",
  52                .channels_min = 2,
  53                .channels_max = 2,
  54                .rates = SNDRV_PCM_RATE_8000_48000,
  55                .formats = SNDRV_PCM_FMTBIT_S16_LE,
  56        },
  57        .capture = {
  58                .stream_name = "Capture",
  59                .channels_min = 2,
  60                .channels_max = 2,
  61                .rates = SNDRV_PCM_RATE_8000_48000,
  62                .formats = SNDRV_PCM_FMTBIT_S16_LE,
  63        },
  64        .symmetric_rates = 1,
  65};
  66
  67static struct snd_soc_codec_driver soc_codec_dev_ak4554 = {
  68        .dapm_widgets = ak4554_dapm_widgets,
  69        .num_dapm_widgets = ARRAY_SIZE(ak4554_dapm_widgets),
  70        .dapm_routes = ak4554_dapm_routes,
  71        .num_dapm_routes = ARRAY_SIZE(ak4554_dapm_routes),
  72};
  73
  74static int ak4554_soc_probe(struct platform_device *pdev)
  75{
  76        return snd_soc_register_codec(&pdev->dev,
  77                                      &soc_codec_dev_ak4554,
  78                                      &ak4554_dai, 1);
  79}
  80
  81static int ak4554_soc_remove(struct platform_device *pdev)
  82{
  83        snd_soc_unregister_codec(&pdev->dev);
  84        return 0;
  85}
  86
  87static struct of_device_id ak4554_of_match[] = {
  88        { .compatible = "asahi-kasei,ak4554" },
  89        {},
  90};
  91MODULE_DEVICE_TABLE(of, ak4554_of_match);
  92
  93static struct platform_driver ak4554_driver = {
  94        .driver = {
  95                .name = "ak4554-adc-dac",
  96                .owner = THIS_MODULE,
  97                .of_match_table = ak4554_of_match,
  98        },
  99        .probe  = ak4554_soc_probe,
 100        .remove = ak4554_soc_remove,
 101};
 102module_platform_driver(ak4554_driver);
 103
 104MODULE_LICENSE("GPL");
 105MODULE_DESCRIPTION("SoC AK4554 driver");
 106MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 107