sound/soc/codecs/adau7002.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ADAU7002 Stereo PDM-to-I2S/TDM converter driver
   4  *
   5  * Copyright 2014-2016 Analog Devices
   6  *  Author: Lars-Peter Clausen <lars@metafoo.de>
   7  */
   8
   9 #include <linux/acpi.h>
  10 #include <linux/delay.h>
  11 #include <linux/init.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/platform_device.h>
  15
  16 #include <sound/soc.h>
  17
  18 struct adau7002_priv {
  19         int wakeup_delay;
  20 };
  21
  22 static int adau7002_aif_event(struct snd_soc_dapm_widget *w,
  23                               struct snd_kcontrol *kcontrol, int event)
  24 {
  25         struct snd_soc_component *component =
  26                         snd_soc_dapm_to_component(w->dapm);
  27         struct adau7002_priv *adau7002 =
  28                         snd_soc_component_get_drvdata(component);
  29
  30         switch (event) {
  31         case SND_SOC_DAPM_POST_PMU:
  32                 if (adau7002->wakeup_delay)
  33                         msleep(adau7002->wakeup_delay);
  34                 break;
  35         }
  36
  37         return 0;
  38 }
  39
  40 static int adau7002_component_probe(struct snd_soc_component *component)
  41 {
  42         struct adau7002_priv *adau7002;
  43
  44         adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002),
  45                                 GFP_KERNEL);
  46         if (!adau7002)
  47                 return -ENOMEM;
  48
  49         device_property_read_u32(component->dev, "wakeup-delay-ms",
  50                                  &adau7002->wakeup_delay);
  51
  52         snd_soc_component_set_drvdata(component, adau7002);
  53
  54         return 0;
  55 }
  56
  57 static const struct snd_soc_dapm_widget adau7002_widgets[] = {
  58         SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0,
  59                                SND_SOC_NOPM, 0, 0, adau7002_aif_event,
  60                                SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
  61         SND_SOC_DAPM_INPUT("PDM_DAT"),
  62         SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
  63 };
  64
  65 static const struct snd_soc_dapm_route adau7002_routes[] = {
  66         { "ADAU AIF", NULL, "PDM_DAT"},
  67         { "Capture", NULL, "PDM_DAT" },
  68         { "Capture", NULL, "IOVDD" },
  69 };
  70
  71 static struct snd_soc_dai_driver adau7002_dai = {
  72         .name = "adau7002-hifi",
  73         .capture = {
  74                 .stream_name = "Capture",
  75                 .channels_min = 2,
  76                 .channels_max = 2,
  77                 .rates = SNDRV_PCM_RATE_8000_96000,
  78                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
  79                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
  80                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
  81                 .sig_bits = 20,
  82         },
  83 };
  84
  85 static const struct snd_soc_component_driver adau7002_component_driver = {
  86         .probe                  = adau7002_component_probe,
  87         .dapm_widgets           = adau7002_widgets,
  88         .num_dapm_widgets       = ARRAY_SIZE(adau7002_widgets),
  89         .dapm_routes            = adau7002_routes,
  90         .num_dapm_routes        = ARRAY_SIZE(adau7002_routes),
  91         .idle_bias_on           = 1,
  92         .use_pmdown_time        = 1,
  93         .endianness             = 1,
  94         .non_legacy_dai_naming  = 1,
  95 };
  96
  97 static int adau7002_probe(struct platform_device *pdev)
  98 {
  99         return devm_snd_soc_register_component(&pdev->dev,
 100                         &adau7002_component_driver,
 101                         &adau7002_dai, 1);
 102 }
 103
 104 static int adau7002_remove(struct platform_device *pdev)
 105 {
 106         return 0;
 107 }
 108
 109 #ifdef CONFIG_OF
 110 static const struct of_device_id adau7002_dt_ids[] = {
 111         { .compatible = "adi,adau7002", },
 112         { }
 113 };
 114 MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
 115 #endif
 116
 117 #ifdef CONFIG_ACPI
 118 static const struct acpi_device_id adau7002_acpi_match[] = {
 119         { "ADAU7002", 0 },
 120         {},
 121 };
 122 MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
 123 #endif
 124
 125 static struct platform_driver adau7002_driver = {
 126         .driver = {
 127                 .name = "adau7002",
 128                 .of_match_table = of_match_ptr(adau7002_dt_ids),
 129                 .acpi_match_table = ACPI_PTR(adau7002_acpi_match),
 130         },
 131         .probe = adau7002_probe,
 132         .remove = adau7002_remove,
 133 };
 134 module_platform_driver(adau7002_driver);
 135
 136 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 137 MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
 138 MODULE_LICENSE("GPL v2");