avs/boards/dmic.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 //
0003 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
0004 //
0005 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
0006 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
0007 //
0008
0009 #include <linux/device.h>
0010 #include <linux/module.h>
0011 #include <sound/soc.h>
0012 #include <sound/soc-acpi.h>
0013
0014 SND_SOC_DAILINK_DEF(dmic_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC Pin")));
0015 SND_SOC_DAILINK_DEF(dmic_wov_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC WoV Pin")));
0016 SND_SOC_DAILINK_DEF(dmic_codec, DAILINK_COMP_ARRAY(COMP_CODEC("dmic-codec", "dmic-hifi")));
0017 /* Name overridden on probe */
0018 SND_SOC_DAILINK_DEF(platform, DAILINK_COMP_ARRAY(COMP_PLATFORM("")));
0019
0020 static struct snd_soc_dai_link card_dai_links[] = {
0021     /* Back ends */
0022     {
0023         .name = "DMIC",
0024         .id = 0,
0025         .dpcm_capture = 1,
0026         .nonatomic = 1,
0027         .no_pcm = 1,
0028         SND_SOC_DAILINK_REG(dmic_pin, dmic_codec, platform),
0029     },
0030     {
0031         .name = "DMIC WoV",
0032         .id = 1,
0033         .dpcm_capture = 1,
0034         .nonatomic = 1,
0035         .no_pcm = 1,
0036         .ignore_suspend = 1,
0037         SND_SOC_DAILINK_REG(dmic_wov_pin, dmic_codec, platform),
0038     },
0039 };
0040
0041 static const struct snd_soc_dapm_widget card_widgets[] = {
0042     SND_SOC_DAPM_MIC("SoC DMIC", NULL),
0043 };
0044
0045 static const struct snd_soc_dapm_route card_routes[] = {
0046     {"DMic", NULL, "SoC DMIC"},
0047     {"DMIC Rx", NULL, "Capture"},
0048     {"DMIC WoV Rx", NULL, "Capture"},
0049 };
0050
0051 static int avs_dmic_probe(struct platform_device *pdev)
0052 {
0053     struct snd_soc_acpi_mach *mach;
0054     struct snd_soc_card *card;
0055     struct device *dev = &pdev->dev;
0056     int ret;
0057
0058     mach = dev_get_platdata(dev);
0059
0060     card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
0061     if (!card)
0062         return -ENOMEM;
0063
0064     card->name = "avs_dmic";
0065     card->dev = dev;
0066     card->owner = THIS_MODULE;
0067     card->dai_link = card_dai_links;
0068     card->num_links = ARRAY_SIZE(card_dai_links);
0069     card->dapm_widgets = card_widgets;
0070     card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
0071     card->dapm_routes = card_routes;
0072     card->num_dapm_routes = ARRAY_SIZE(card_routes);
0073     card->fully_routed = true;
0074
0075     ret = snd_soc_fixup_dai_links_platform_name(card, mach->mach_params.platform);
0076     if (ret)
0077         return ret;
0078
0079     return devm_snd_soc_register_card(dev, card);
0080 }
0081
0082 static struct platform_driver avs_dmic_driver = {
0083     .probe = avs_dmic_probe,
0084     .driver = {
0085         .name = "avs_dmic",
0086         .pm = &snd_soc_pm_ops,
0087     },
0088 };
0089
0090 module_platform_driver(avs_dmic_driver);
0091
0092 MODULE_LICENSE("GPL");
0093 MODULE_ALIAS("platform:avs_dmic");