sound/soc/intel/avs/boards/dmic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 //
   3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
   4 //
   5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
   6 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
   7 //
   8
   9 #include <linux/device.h>
  10 #include <linux/module.h>
  11 #include <sound/soc.h>
  12 #include <sound/soc-acpi.h>
  13
  14 SND_SOC_DAILINK_DEF(dmic_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC Pin")));
  15 SND_SOC_DAILINK_DEF(dmic_wov_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC WoV Pin")));
  16 SND_SOC_DAILINK_DEF(dmic_codec, DAILINK_COMP_ARRAY(COMP_CODEC("dmic-codec", "dmic-hifi")));
  17 /* Name overridden on probe */
  18 SND_SOC_DAILINK_DEF(platform, DAILINK_COMP_ARRAY(COMP_PLATFORM("")));
  19
  20 static struct snd_soc_dai_link card_dai_links[] = {
  21         /* Back ends */
  22         {
  23                 .name = "DMIC",
  24                 .id = 0,
  25                 .dpcm_capture = 1,
  26                 .nonatomic = 1,
  27                 .no_pcm = 1,
  28                 SND_SOC_DAILINK_REG(dmic_pin, dmic_codec, platform),
  29         },
  30         {
  31                 .name = "DMIC WoV",
  32                 .id = 1,
  33                 .dpcm_capture = 1,
  34                 .nonatomic = 1,
  35                 .no_pcm = 1,
  36                 .ignore_suspend = 1,
  37                 SND_SOC_DAILINK_REG(dmic_wov_pin, dmic_codec, platform),
  38         },
  39 };
  40
  41 static const struct snd_soc_dapm_widget card_widgets[] = {
  42         SND_SOC_DAPM_MIC("SoC DMIC", NULL),
  43 };
  44
  45 static const struct snd_soc_dapm_route card_routes[] = {
  46         {"DMic", NULL, "SoC DMIC"},
  47 };
  48
  49 static int avs_dmic_probe(struct platform_device *pdev)
  50 {
  51         struct snd_soc_acpi_mach *mach;
  52         struct snd_soc_card *card;
  53         struct device *dev = &pdev->dev;
  54         int ret;
  55
  56         mach = dev_get_platdata(dev);
  57
  58         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
  59         if (!card)
  60                 return -ENOMEM;
  61
  62         card->name = "avs_dmic";
  63         card->dev = dev;
  64         card->owner = THIS_MODULE;
  65         card->dai_link = card_dai_links;
  66         card->num_links = ARRAY_SIZE(card_dai_links);
  67         card->dapm_widgets = card_widgets;
  68         card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
  69         card->dapm_routes = card_routes;
  70         card->num_dapm_routes = ARRAY_SIZE(card_routes);
  71         card->fully_routed = true;
  72
  73         ret = snd_soc_fixup_dai_links_platform_name(card, mach->mach_params.platform);
  74         if (ret)
  75                 return ret;
  76
  77         return devm_snd_soc_register_card(dev, card);
  78 }
  79
  80 static const struct platform_device_id avs_dmic_driver_ids[] = {
  81         {
  82                 .name = "avs_dmic",
  83         },
  84         {},
  85 };
  86 MODULE_DEVICE_TABLE(platform, avs_dmic_driver_ids);
  87
  88 static struct platform_driver avs_dmic_driver = {
  89         .probe = avs_dmic_probe,
  90         .driver = {
  91                 .name = "avs_dmic",
  92                 .pm = &snd_soc_pm_ops,
  93         },
  94         .id_table = avs_dmic_driver_ids,
  95 };
  96
  97 module_platform_driver(avs_dmic_driver);
  98
  99 MODULE_LICENSE("GPL");