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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * sound/soc/codecs/wm8782.c4 * simple, strap-pin configured 24bit 2ch ADC5 *6 * Copyright: 2011 Raumfeld GmbH7 * Author: Johannes Stezenbach <js@sig21.net>8 *9 * based on ad73311.c10 * 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_PM88static 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#else101#define wm8782_soc_suspend NULL102#define wm8782_soc_resume NULL103#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 overclocking141 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_OF166static const struct of_device_id wm8782_of_match[] = {167 { .compatible = "wlf,wm8782", },168 { }169};170MODULE_DEVICE_TABLE(of, wm8782_of_match);171#endif172 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");186