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 */ |
27 | static const char *supply_names[] = { |
28 | "Vdda" , /* analog supply, 2.7V - 3.6V */ |
29 | "Vdd" , /* digital supply, 2.7V - 5.5V */ |
30 | }; |
31 | |
32 | struct wm8782_priv { |
33 | struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; |
34 | int max_rate; |
35 | }; |
36 | |
37 | static 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(c: dai->component); |
42 | |
43 | return snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, |
44 | min: 8000, max: priv->max_rate); |
45 | } |
46 | |
47 | static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = { |
48 | SND_SOC_DAPM_INPUT("AINL" ), |
49 | SND_SOC_DAPM_INPUT("AINR" ), |
50 | }; |
51 | |
52 | static const struct snd_soc_dapm_route wm8782_dapm_routes[] = { |
53 | { "Capture" , NULL, "AINL" }, |
54 | { "Capture" , NULL, "AINR" }, |
55 | }; |
56 | |
57 | static const struct snd_soc_dai_ops wm8782_dai_ops = { |
58 | .startup = &wm8782_dai_startup, |
59 | }; |
60 | |
61 | static 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 | |
75 | static int wm8782_soc_probe(struct snd_soc_component *component) |
76 | { |
77 | struct wm8782_priv *priv = snd_soc_component_get_drvdata(c: component); |
78 | return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), consumers: priv->supplies); |
79 | } |
80 | |
81 | static void wm8782_soc_remove(struct snd_soc_component *component) |
82 | { |
83 | struct wm8782_priv *priv = snd_soc_component_get_drvdata(c: component); |
84 | regulator_bulk_disable(ARRAY_SIZE(priv->supplies), consumers: priv->supplies); |
85 | } |
86 | |
87 | #ifdef CONFIG_PM |
88 | static int wm8782_soc_suspend(struct snd_soc_component *component) |
89 | { |
90 | struct wm8782_priv *priv = snd_soc_component_get_drvdata(c: component); |
91 | regulator_bulk_disable(ARRAY_SIZE(priv->supplies), consumers: priv->supplies); |
92 | return 0; |
93 | } |
94 | |
95 | static int wm8782_soc_resume(struct snd_soc_component *component) |
96 | { |
97 | struct wm8782_priv *priv = snd_soc_component_get_drvdata(c: component); |
98 | return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), consumers: priv->supplies); |
99 | } |
100 | #else |
101 | #define wm8782_soc_suspend NULL |
102 | #define wm8782_soc_resume NULL |
103 | #endif /* CONFIG_PM */ |
104 | |
105 | static 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 | |
119 | static 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, size: sizeof(*priv), GFP_KERNEL); |
127 | if (!priv) |
128 | return -ENOMEM; |
129 | |
130 | dev_set_drvdata(dev, data: 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 | consumers: 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, propname: "wlf,fsampen" , out_value: &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(dev: &pdev->dev, |
162 | component_driver: &soc_component_dev_wm8782, dai_drv: &wm8782_dai, num_dai: 1); |
163 | } |
164 | |
165 | #ifdef CONFIG_OF |
166 | static const struct of_device_id wm8782_of_match[] = { |
167 | { .compatible = "wlf,wm8782" , }, |
168 | { } |
169 | }; |
170 | MODULE_DEVICE_TABLE(of, wm8782_of_match); |
171 | #endif |
172 | |
173 | static 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 | |
181 | module_platform_driver(wm8782_codec_driver); |
182 | |
183 | MODULE_DESCRIPTION("ASoC WM8782 driver" ); |
184 | MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>" ); |
185 | MODULE_LICENSE("GPL" ); |
186 | |