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 <linux/regulator/consumer.h> 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/ac97_codec.h> 27 #include <sound/initval.h> 28 #include <sound/soc.h> 29 30 static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = { 31 SND_SOC_DAPM_INPUT("AINL"), 32 SND_SOC_DAPM_INPUT("AINR"), 33 }; 34 35 static const struct snd_soc_dapm_route wm8782_dapm_routes[] = { 36 { "Capture", NULL, "AINL" }, 37 { "Capture", NULL, "AINR" }, 38 }; 39 40 static struct snd_soc_dai_driver wm8782_dai = { 41 .name = "wm8782", 42 .capture = { 43 .stream_name = "Capture", 44 .channels_min = 2, 45 .channels_max = 2, 46 /* For configurations with FSAMPEN=0 */ 47 .rates = SNDRV_PCM_RATE_8000_48000, 48 .formats = SNDRV_PCM_FMTBIT_S16_LE | 49 SNDRV_PCM_FMTBIT_S20_3LE | 50 SNDRV_PCM_FMTBIT_S24_LE, 51 }, 52 }; 53 54 /* regulator power supply names */ 55 static const char *supply_names[] = { 56 "Vdda", /* analog supply, 2.7V - 3.6V */ 57 "Vdd", /* digital supply, 2.7V - 5.5V */ 58 }; 59 60 struct wm8782_priv { 61 struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; 62 }; 63 64 static int wm8782_soc_probe(struct snd_soc_component *component) 65 { 66 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); 67 return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); 68 } 69 70 static void wm8782_soc_remove(struct snd_soc_component *component) 71 { 72 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); 73 regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); 74 } 75 76 #ifdef CONFIG_PM 77 static int wm8782_soc_suspend(struct snd_soc_component *component) 78 { 79 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); 80 regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); 81 return 0; 82 } 83 84 static int wm8782_soc_resume(struct snd_soc_component *component) 85 { 86 struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); 87 return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); 88 } 89 #else 90 #define wm8782_soc_suspend NULL 91 #define wm8782_soc_resume NULL 92 #endif /* CONFIG_PM */ 93 94 static const struct snd_soc_component_driver soc_component_dev_wm8782 = { 95 .probe = wm8782_soc_probe, 96 .remove = wm8782_soc_remove, 97 .suspend = wm8782_soc_suspend, 98 .resume = wm8782_soc_resume, 99 .dapm_widgets = wm8782_dapm_widgets, 100 .num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets), 101 .dapm_routes = wm8782_dapm_routes, 102 .num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes), 103 .idle_bias_on = 1, 104 .use_pmdown_time = 1, 105 .endianness = 1, 106 .non_legacy_dai_naming = 1, 107 }; 108 109 static int wm8782_probe(struct platform_device *pdev) 110 { 111 struct device *dev = &pdev->dev; 112 struct wm8782_priv *priv; 113 int ret, i; 114 115 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 116 if (!priv) 117 return -ENOMEM; 118 119 dev_set_drvdata(dev, priv); 120 121 for (i = 0; i < ARRAY_SIZE(supply_names); i++) 122 priv->supplies[i].supply = supply_names[i]; 123 124 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies), 125 priv->supplies); 126 if (ret < 0) 127 return ret; 128 129 return devm_snd_soc_register_component(&pdev->dev, 130 &soc_component_dev_wm8782, &wm8782_dai, 1); 131 } 132 133 #ifdef CONFIG_OF 134 static const struct of_device_id wm8782_of_match[] = { 135 { .compatible = "wlf,wm8782", }, 136 { } 137 }; 138 MODULE_DEVICE_TABLE(of, wm8782_of_match); 139 #endif 140 141 static struct platform_driver wm8782_codec_driver = { 142 .driver = { 143 .name = "wm8782", 144 .of_match_table = of_match_ptr(wm8782_of_match), 145 }, 146 .probe = wm8782_probe, 147 }; 148 149 module_platform_driver(wm8782_codec_driver); 150 151 MODULE_DESCRIPTION("ASoC WM8782 driver"); 152 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>"); 153 MODULE_LICENSE("GPL"); 154