1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sound/soc/codecs/wm8782.c
4 * simple, strap-pin configured 24bit 2ch ADC
5 *
6 * Copyright: 2011 Raumfeld GmbH
7 * Author: Johannes Stezenbach <js@sig21.net>
8 *
9 * based on ad73311.c
10 * Copyright: Analog Device Inc.
11 * Author: Cliff Cai <cliff.cai@analog.com>
12 */
13
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/device.h>
19 #include <linux/regulator/consumer.h>
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/ac97_codec.h>
23 #include <sound/initval.h>
24 #include <sound/soc.h>
25
26 static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
27 SND_SOC_DAPM_INPUT("AINL"),
28 SND_SOC_DAPM_INPUT("AINR"),
29 };
30
31 static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
32 { "Capture", NULL, "AINL" },
33 { "Capture", NULL, "AINR" },
34 };
35
36 static struct snd_soc_dai_driver wm8782_dai = {
37 .name = "wm8782",
38 .capture = {
39 .stream_name = "Capture",
40 .channels_min = 2,
41 .channels_max = 2,
42 /* For configurations with FSAMPEN=0 */
43 .rates = SNDRV_PCM_RATE_8000_48000,
44 .formats = SNDRV_PCM_FMTBIT_S16_LE |
45 SNDRV_PCM_FMTBIT_S20_3LE |
46 SNDRV_PCM_FMTBIT_S24_LE,
47 },
48 };
49
50 /* regulator power supply names */
51 static const char *supply_names[] = {
52 "Vdda", /* analog supply, 2.7V - 3.6V */
53 "Vdd", /* digital supply, 2.7V - 5.5V */
54 };
55
56 struct wm8782_priv {
57 struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
58 };
59
wm8782_soc_probe(struct snd_soc_component * component)60 static int wm8782_soc_probe(struct snd_soc_component *component)
61 {
62 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
63 return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
64 }
65
wm8782_soc_remove(struct snd_soc_component * component)66 static void wm8782_soc_remove(struct snd_soc_component *component)
67 {
68 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
69 regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
70 }
71
72 #ifdef CONFIG_PM
wm8782_soc_suspend(struct snd_soc_component * component)73 static int wm8782_soc_suspend(struct snd_soc_component *component)
74 {
75 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
76 regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
77 return 0;
78 }
79
wm8782_soc_resume(struct snd_soc_component * component)80 static int wm8782_soc_resume(struct snd_soc_component *component)
81 {
82 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
83 return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
84 }
85 #else
86 #define wm8782_soc_suspend NULL
87 #define wm8782_soc_resume NULL
88 #endif /* CONFIG_PM */
89
90 static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
91 .probe = wm8782_soc_probe,
92 .remove = wm8782_soc_remove,
93 .suspend = wm8782_soc_suspend,
94 .resume = wm8782_soc_resume,
95 .dapm_widgets = wm8782_dapm_widgets,
96 .num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets),
97 .dapm_routes = wm8782_dapm_routes,
98 .num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes),
99 .idle_bias_on = 1,
100 .use_pmdown_time = 1,
101 .endianness = 1,
102 .non_legacy_dai_naming = 1,
103 };
104
wm8782_probe(struct platform_device * pdev)105 static int wm8782_probe(struct platform_device *pdev)
106 {
107 struct device *dev = &pdev->dev;
108 struct wm8782_priv *priv;
109 int ret, i;
110
111 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
112 if (!priv)
113 return -ENOMEM;
114
115 dev_set_drvdata(dev, priv);
116
117 for (i = 0; i < ARRAY_SIZE(supply_names); i++)
118 priv->supplies[i].supply = supply_names[i];
119
120 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
121 priv->supplies);
122 if (ret < 0)
123 return ret;
124
125 return devm_snd_soc_register_component(&pdev->dev,
126 &soc_component_dev_wm8782, &wm8782_dai, 1);
127 }
128
129 #ifdef CONFIG_OF
130 static const struct of_device_id wm8782_of_match[] = {
131 { .compatible = "wlf,wm8782", },
132 { }
133 };
134 MODULE_DEVICE_TABLE(of, wm8782_of_match);
135 #endif
136
137 static struct platform_driver wm8782_codec_driver = {
138 .driver = {
139 .name = "wm8782",
140 .of_match_table = of_match_ptr(wm8782_of_match),
141 },
142 .probe = wm8782_probe,
143 };
144
145 module_platform_driver(wm8782_codec_driver);
146
147 MODULE_DESCRIPTION("ASoC WM8782 driver");
148 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
149 MODULE_LICENSE("GPL");
150
