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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 Devices 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/* regulator power supply names */
27static const char *supply_names[] = {
28 "Vdda", /* analog supply, 2.7V - 3.6V */
29 "Vdd", /* digital supply, 2.7V - 5.5V */
30};
31
32struct wm8782_priv {
33 struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
34 int max_rate;
35};
36
37static int wm8782_dai_startup(struct snd_pcm_substream *sub, struct snd_soc_dai *dai)
38{
39 struct snd_pcm_runtime *runtime = sub->runtime;
40 struct wm8782_priv *priv =
41 snd_soc_component_get_drvdata(dai->component);
42
43 return snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
44 8000, priv->max_rate);
45}
46
47static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
48SND_SOC_DAPM_INPUT("AINL"),
49SND_SOC_DAPM_INPUT("AINR"),
50};
51
52static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
53 { "Capture", NULL, "AINL" },
54 { "Capture", NULL, "AINR" },
55};
56
57static const struct snd_soc_dai_ops wm8782_dai_ops = {
58 .startup = &wm8782_dai_startup,
59};
60
61static struct snd_soc_dai_driver wm8782_dai = {
62 .name = "wm8782",
63 .capture = {
64 .stream_name = "Capture",
65 .channels_min = 2,
66 .channels_max = 2,
67 .rates = SNDRV_PCM_RATE_8000_192000,
68 .formats = SNDRV_PCM_FMTBIT_S16_LE |
69 SNDRV_PCM_FMTBIT_S20_3LE |
70 SNDRV_PCM_FMTBIT_S24_LE,
71 },
72 .ops = &wm8782_dai_ops,
73};
74
75static int wm8782_soc_probe(struct snd_soc_component *component)
76{
77 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
78 return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
79}
80
81static void wm8782_soc_remove(struct snd_soc_component *component)
82{
83 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
84 regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
85}
86
87#ifdef CONFIG_PM
88static int wm8782_soc_suspend(struct snd_soc_component *component)
89{
90 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
91 regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
92 return 0;
93}
94
95static int wm8782_soc_resume(struct snd_soc_component *component)
96{
97 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
98 return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
99}
100#else
101#define wm8782_soc_suspend NULL
102#define wm8782_soc_resume NULL
103#endif /* CONFIG_PM */
104
105static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
106 .probe = wm8782_soc_probe,
107 .remove = wm8782_soc_remove,
108 .suspend = wm8782_soc_suspend,
109 .resume = wm8782_soc_resume,
110 .dapm_widgets = wm8782_dapm_widgets,
111 .num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets),
112 .dapm_routes = wm8782_dapm_routes,
113 .num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes),
114 .idle_bias_on = 1,
115 .use_pmdown_time = 1,
116 .endianness = 1,
117};
118
119static int wm8782_probe(struct platform_device *pdev)
120{
121 struct device *dev = &pdev->dev;
122 struct device_node *np = dev->of_node;
123 struct wm8782_priv *priv;
124 int ret, i, fsampen;
125
126 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
127 if (!priv)
128 return -ENOMEM;
129
130 dev_set_drvdata(dev, priv);
131
132 for (i = 0; i < ARRAY_SIZE(supply_names); i++)
133 priv->supplies[i].supply = supply_names[i];
134
135 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
136 priv->supplies);
137 if (ret < 0)
138 return ret;
139
140 // Assume lowest value by default to avoid inadvertent overclocking
141 fsampen = 0;
142
143 if (np)
144 of_property_read_u32(np, "wlf,fsampen", &fsampen);
145
146 switch (fsampen) {
147 case 0:
148 priv->max_rate = 48000;
149 break;
150 case 1:
151 priv->max_rate = 96000;
152 break;
153 case 2:
154 priv->max_rate = 192000;
155 break;
156 default:
157 dev_err(dev, "Invalid wlf,fsampen value");
158 return -EINVAL;
159 }
160
161 return devm_snd_soc_register_component(&pdev->dev,
162 &soc_component_dev_wm8782, &wm8782_dai, 1);
163}
164
165#ifdef CONFIG_OF
166static const struct of_device_id wm8782_of_match[] = {
167 { .compatible = "wlf,wm8782", },
168 { }
169};
170MODULE_DEVICE_TABLE(of, wm8782_of_match);
171#endif
172
173static struct platform_driver wm8782_codec_driver = {
174 .driver = {
175 .name = "wm8782",
176 .of_match_table = of_match_ptr(wm8782_of_match),
177 },
178 .probe = wm8782_probe,
179};
180
181module_platform_driver(wm8782_codec_driver);
182
183MODULE_DESCRIPTION("ASoC WM8782 driver");
184MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
185MODULE_LICENSE("GPL");
1/*
2 * sound/soc/codecs/wm8782.c
3 * simple, strap-pin configured 24bit 2ch ADC
4 *
5 * Copyright: 2011 Raumfeld GmbH
6 * Author: Johannes Stezenbach <js@sig21.net>
7 *
8 * based on ad73311.c
9 * Copyright: Analog Device Inc.
10 * Author: Cliff Cai <cliff.cai@analog.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/device.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/ac97_codec.h>
26#include <sound/initval.h>
27#include <sound/soc.h>
28
29static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
30SND_SOC_DAPM_INPUT("AINL"),
31SND_SOC_DAPM_INPUT("AINR"),
32};
33
34static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
35 { "Capture", NULL, "AINL" },
36 { "Capture", NULL, "AINR" },
37};
38
39static struct snd_soc_dai_driver wm8782_dai = {
40 .name = "wm8782",
41 .capture = {
42 .stream_name = "Capture",
43 .channels_min = 2,
44 .channels_max = 2,
45 /* For configurations with FSAMPEN=0 */
46 .rates = SNDRV_PCM_RATE_8000_48000,
47 .formats = SNDRV_PCM_FMTBIT_S16_LE |
48 SNDRV_PCM_FMTBIT_S20_3LE |
49 SNDRV_PCM_FMTBIT_S24_LE,
50 },
51};
52
53static const struct snd_soc_codec_driver soc_codec_dev_wm8782 = {
54 .component_driver = {
55 .dapm_widgets = wm8782_dapm_widgets,
56 .num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets),
57 .dapm_routes = wm8782_dapm_routes,
58 .num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes),
59 },
60};
61
62static int wm8782_probe(struct platform_device *pdev)
63{
64 return snd_soc_register_codec(&pdev->dev,
65 &soc_codec_dev_wm8782, &wm8782_dai, 1);
66}
67
68static int wm8782_remove(struct platform_device *pdev)
69{
70 snd_soc_unregister_codec(&pdev->dev);
71 return 0;
72}
73
74static struct platform_driver wm8782_codec_driver = {
75 .driver = {
76 .name = "wm8782",
77 },
78 .probe = wm8782_probe,
79 .remove = wm8782_remove,
80};
81
82module_platform_driver(wm8782_codec_driver);
83
84MODULE_DESCRIPTION("ASoC WM8782 driver");
85MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
86MODULE_LICENSE("GPL");