1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2021-2022 Intel Corporation
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_DESCRIPTION("Intel DMIC machine driver");
100 MODULE_LICENSE("GPL");
101
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