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 #include "../utils.h"
14
15 SND_SOC_DAILINK_DEF(dmic_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC Pin")));
16 SND_SOC_DAILINK_DEF(dmic_wov_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC WoV Pin")));
17 SND_SOC_DAILINK_DEF(dmic_codec, DAILINK_COMP_ARRAY(COMP_CODEC("dmic-codec", "dmic-hifi")));
18 /* Name overridden on probe */
19 SND_SOC_DAILINK_DEF(platform, DAILINK_COMP_ARRAY(COMP_PLATFORM("")));
20
21 static struct snd_soc_dai_link card_dai_links[] = {
22 /* Back ends */
23 {
24 .name = "DMIC",
25 .id = 0,
26 .capture_only = 1,
27 .nonatomic = 1,
28 .no_pcm = 1,
29 SND_SOC_DAILINK_REG(dmic_pin, dmic_codec, platform),
30 },
31 {
32 .name = "DMIC WoV",
33 .id = 1,
34 .capture_only = 1,
35 .nonatomic = 1,
36 .no_pcm = 1,
37 .ignore_suspend = 1,
38 SND_SOC_DAILINK_REG(dmic_wov_pin, dmic_codec, platform),
39 },
40 };
41
42 static const struct snd_soc_dapm_widget card_widgets[] = {
43 SND_SOC_DAPM_MIC("SoC DMIC", NULL),
44 };
45
46 static const struct snd_soc_dapm_route card_routes[] = {
47 {"DMic", NULL, "SoC DMIC"},
48 };
49
avs_dmic_probe(struct platform_device * pdev)50 static int avs_dmic_probe(struct platform_device *pdev)
51 {
52 struct snd_soc_acpi_mach *mach;
53 struct avs_mach_pdata *pdata;
54 struct snd_soc_card *card;
55 struct device *dev = &pdev->dev;
56 int ret;
57
58 mach = dev_get_platdata(dev);
59 pdata = mach->pdata;
60
61 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
62 if (!card)
63 return -ENOMEM;
64
65 if (pdata->obsolete_card_names) {
66 card->name = "avs_dmic";
67 } else {
68 card->driver_name = "avs_dmic";
69 card->long_name = card->name = "AVS DMIC";
70 }
71 card->dev = dev;
72 card->owner = THIS_MODULE;
73 card->dai_link = card_dai_links;
74 card->num_links = ARRAY_SIZE(card_dai_links);
75 card->dapm_widgets = card_widgets;
76 card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
77 card->dapm_routes = card_routes;
78 card->num_dapm_routes = ARRAY_SIZE(card_routes);
79 card->fully_routed = true;
80
81 ret = snd_soc_fixup_dai_links_platform_name(card, mach->mach_params.platform);
82 if (ret)
83 return ret;
84
85 return devm_snd_soc_register_deferrable_card(dev, card);
86 }
87
88 static const struct platform_device_id avs_dmic_driver_ids[] = {
89 {
90 .name = "avs_dmic",
91 },
92 {},
93 };
94 MODULE_DEVICE_TABLE(platform, avs_dmic_driver_ids);
95
96 static struct platform_driver avs_dmic_driver = {
97 .probe = avs_dmic_probe,
98 .driver = {
99 .name = "avs_dmic",
100 .pm = &snd_soc_pm_ops,
101 },
102 .id_table = avs_dmic_driver_ids,
103 };
104
105 module_platform_driver(avs_dmic_driver);
106
107 MODULE_DESCRIPTION("Intel DMIC machine driver");
108 MODULE_LICENSE("GPL");
109