sound/soc/codecs/ak4554.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // ak4554.c
   3 //
   4 // Copyright (C) 2013 Renesas Solutions Corp.
   5 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6
   7 #include <linux/module.h>
   8 #include <sound/soc.h>
   9
  10 /*
  11  * ak4554 is very simple DA/AD converter which has no setting register.
  12  *
  13  * CAUTION
  14  *
  15  * ak4554 playback format is SND_SOC_DAIFMT_RIGHT_J,
  16  * and,   capture  format is SND_SOC_DAIFMT_LEFT_J
  17  * on same bit clock, LR clock.
  18  * But, this driver doesn't have snd_soc_dai_ops :: set_fmt
  19  *
  20  * CPU/Codec DAI image
  21  *
  22  * CPU-DAI1 (plaback only fmt = RIGHT_J) --+-- ak4554
  23  *                                         |
  24  * CPU-DAI2 (capture only fmt = LEFT_J) ---+
  25  */
  26
  27 static const struct snd_soc_dapm_widget ak4554_dapm_widgets[] = {
  28 SND_SOC_DAPM_INPUT("AINL"),
  29 SND_SOC_DAPM_INPUT("AINR"),
  30
  31 SND_SOC_DAPM_OUTPUT("AOUTL"),
  32 SND_SOC_DAPM_OUTPUT("AOUTR"),
  33 };
  34
  35 static const struct snd_soc_dapm_route ak4554_dapm_routes[] = {
  36         { "Capture", NULL, "AINL" },
  37         { "Capture", NULL, "AINR" },
  38
  39         { "AOUTL", NULL, "Playback" },
  40         { "AOUTR", NULL, "Playback" },
  41 };
  42
  43 static struct snd_soc_dai_driver ak4554_dai = {
  44         .name = "ak4554-hifi",
  45         .playback = {
  46                 .stream_name = "Playback",
  47                 .channels_min = 2,
  48                 .channels_max = 2,
  49                 .rates = SNDRV_PCM_RATE_8000_48000,
  50                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  51         },
  52         .capture = {
  53                 .stream_name = "Capture",
  54                 .channels_min = 2,
  55                 .channels_max = 2,
  56                 .rates = SNDRV_PCM_RATE_8000_48000,
  57                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  58         },
  59         .symmetric_rate = 1,
  60 };
  61
  62 static const struct snd_soc_component_driver soc_component_dev_ak4554 = {
  63         .dapm_widgets           = ak4554_dapm_widgets,
  64         .num_dapm_widgets       = ARRAY_SIZE(ak4554_dapm_widgets),
  65         .dapm_routes            = ak4554_dapm_routes,
  66         .num_dapm_routes        = ARRAY_SIZE(ak4554_dapm_routes),
  67         .idle_bias_on           = 1,
  68         .use_pmdown_time        = 1,
  69         .endianness             = 1,
  70 };
  71
  72 static int ak4554_soc_probe(struct platform_device *pdev)
  73 {
  74         return devm_snd_soc_register_component(&pdev->dev,
  75                                       &soc_component_dev_ak4554,
  76                                       &ak4554_dai, 1);
  77 }
  78
  79 static const struct of_device_id ak4554_of_match[] = {
  80         { .compatible = "asahi-kasei,ak4554" },
  81         {},
  82 };
  83 MODULE_DEVICE_TABLE(of, ak4554_of_match);
  84
  85 static struct platform_driver ak4554_driver = {
  86         .driver = {
  87                 .name = "ak4554-adc-dac",
  88                 .of_match_table = ak4554_of_match,
  89         },
  90         .probe  = ak4554_soc_probe,
  91 };
  92 module_platform_driver(ak4554_driver);
  93
  94 MODULE_LICENSE("GPL v2");
  95 MODULE_DESCRIPTION("SoC AK4554 driver");
  96 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");