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
adau7002_aif_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)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
adau7002_component_probe(struct snd_soc_component * component)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 };
95
adau7002_probe(struct platform_device * pdev)96 static int adau7002_probe(struct platform_device *pdev)
97 {
98 return devm_snd_soc_register_component(&pdev->dev,
99 &adau7002_component_driver,
100 &adau7002_dai, 1);
101 }
102
103 #ifdef CONFIG_OF
104 static const struct of_device_id adau7002_dt_ids[] = {
105 { .compatible = "adi,adau7002", },
106 { }
107 };
108 MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
109 #endif
110
111 #ifdef CONFIG_ACPI
112 static const struct acpi_device_id adau7002_acpi_match[] = {
113 { "ADAU7002", 0 },
114 {},
115 };
116 MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
117 #endif
118
119 static struct platform_driver adau7002_driver = {
120 .driver = {
121 .name = "adau7002",
122 .of_match_table = of_match_ptr(adau7002_dt_ids),
123 .acpi_match_table = ACPI_PTR(adau7002_acpi_match),
124 },
125 .probe = adau7002_probe,
126 };
127 module_platform_driver(adau7002_driver);
128
129 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
130 MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
131 MODULE_LICENSE("GPL v2");
132