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1// SPDX-License-Identifier: GPL-2.02// Audio driver for PCM17893// Copyright (C) 2018 Bootlin4// Mylène Josserand <mylene.josserand@bootlin.com>5 6#include <linux/gpio/consumer.h>7#include <linux/module.h>8#include <linux/workqueue.h>9 10#include <sound/pcm_params.h>11#include <sound/soc.h>12#include <sound/tlv.h>13 14#include "pcm1789.h"15 16#define PCM1789_MUTE_CONTROL 0x1017#define PCM1789_FMT_CONTROL 0x1118#define PCM1789_SOFT_MUTE 0x1419#define PCM1789_DAC_VOL_LEFT 0x1820#define PCM1789_DAC_VOL_RIGHT 0x1921 22#define PCM1789_FMT_MASK 0x0723#define PCM1789_MUTE_MASK 0x0324#define PCM1789_MUTE_SRET 0x0625 26struct pcm1789_private {27 struct regmap *regmap;28 unsigned int format;29 unsigned int rate;30 struct gpio_desc *reset;31 struct work_struct work;32 struct device *dev;33};34 35static const struct reg_default pcm1789_reg_defaults[] = {36 { PCM1789_FMT_CONTROL, 0x00 },37 { PCM1789_SOFT_MUTE, 0x00 },38 { PCM1789_DAC_VOL_LEFT, 0xff },39 { PCM1789_DAC_VOL_RIGHT, 0xff },40};41 42static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)43{44 return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;45}46 47static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)48{49 return pcm1789_accessible_reg(dev, reg);50}51 52static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,53 unsigned int format)54{55 struct snd_soc_component *component = codec_dai->component;56 struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);57 58 priv->format = format;59 60 return 0;61}62 63static int pcm1789_mute(struct snd_soc_dai *codec_dai, int mute, int direction)64{65 struct snd_soc_component *component = codec_dai->component;66 struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);67 68 return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,69 PCM1789_MUTE_MASK,70 mute ? 0 : PCM1789_MUTE_MASK);71}72 73static int pcm1789_hw_params(struct snd_pcm_substream *substream,74 struct snd_pcm_hw_params *params,75 struct snd_soc_dai *codec_dai)76{77 struct snd_soc_component *component = codec_dai->component;78 struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);79 int val = 0, ret;80 81 priv->rate = params_rate(params);82 83 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {84 case SND_SOC_DAIFMT_RIGHT_J:85 switch (params_width(params)) {86 case 24:87 val = 2;88 break;89 case 16:90 val = 3;91 break;92 default:93 return -EINVAL;94 }95 break;96 case SND_SOC_DAIFMT_I2S:97 switch (params_width(params)) {98 case 16:99 case 24:100 case 32:101 val = 0;102 break;103 default:104 return -EINVAL;105 }106 break;107 case SND_SOC_DAIFMT_LEFT_J:108 switch (params_width(params)) {109 case 16:110 case 24:111 case 32:112 val = 1;113 break;114 default:115 return -EINVAL;116 }117 break;118 default:119 dev_err(component->dev, "Invalid DAI format\n");120 return -EINVAL;121 }122 123 ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,124 PCM1789_FMT_MASK, val);125 if (ret < 0)126 return ret;127 128 return 0;129}130 131static void pcm1789_work_queue(struct work_struct *work)132{133 struct pcm1789_private *priv = container_of(work,134 struct pcm1789_private,135 work);136 137 /* Perform a software reset to remove codec from desynchronized state */138 if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,139 0x3 << PCM1789_MUTE_SRET, 0) < 0)140 dev_err(priv->dev, "Error while setting SRET");141}142 143static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,144 struct snd_soc_dai *dai)145{146 struct snd_soc_component *component = dai->component;147 struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);148 int ret = 0;149 150 switch (cmd) {151 case SNDRV_PCM_TRIGGER_START:152 case SNDRV_PCM_TRIGGER_RESUME:153 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:154 schedule_work(&priv->work);155 break;156 case SNDRV_PCM_TRIGGER_STOP:157 case SNDRV_PCM_TRIGGER_SUSPEND:158 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:159 break;160 default:161 ret = -EINVAL;162 }163 164 return ret;165}166 167static const struct snd_soc_dai_ops pcm1789_dai_ops = {168 .set_fmt = pcm1789_set_dai_fmt,169 .hw_params = pcm1789_hw_params,170 .mute_stream = pcm1789_mute,171 .trigger = pcm1789_trigger,172 .no_capture_mute = 1,173};174 175static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);176 177static const struct snd_kcontrol_new pcm1789_controls[] = {178 SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,179 PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,180 pcm1789_dac_tlv),181};182 183static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = {184 SND_SOC_DAPM_OUTPUT("IOUTL+"),185 SND_SOC_DAPM_OUTPUT("IOUTL-"),186 SND_SOC_DAPM_OUTPUT("IOUTR+"),187 SND_SOC_DAPM_OUTPUT("IOUTR-"),188};189 190static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = {191 { "IOUTL+", NULL, "Playback" },192 { "IOUTL-", NULL, "Playback" },193 { "IOUTR+", NULL, "Playback" },194 { "IOUTR-", NULL, "Playback" },195};196 197static struct snd_soc_dai_driver pcm1789_dai = {198 .name = "pcm1789-hifi",199 .playback = {200 .stream_name = "Playback",201 .channels_min = 2,202 .channels_max = 2,203 .rates = SNDRV_PCM_RATE_CONTINUOUS,204 .rate_min = 10000,205 .rate_max = 200000,206 .formats = PCM1789_FORMATS,207 },208 .ops = &pcm1789_dai_ops,209};210 211const struct regmap_config pcm1789_regmap_config = {212 .reg_bits = 8,213 .val_bits = 8,214 .max_register = PCM1789_DAC_VOL_RIGHT,215 .reg_defaults = pcm1789_reg_defaults,216 .num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults),217 .writeable_reg = pcm1789_writeable_reg,218 .readable_reg = pcm1789_accessible_reg,219};220EXPORT_SYMBOL_GPL(pcm1789_regmap_config);221 222static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {223 .controls = pcm1789_controls,224 .num_controls = ARRAY_SIZE(pcm1789_controls),225 .dapm_widgets = pcm1789_dapm_widgets,226 .num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets),227 .dapm_routes = pcm1789_dapm_routes,228 .num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes),229 .idle_bias_on = 1,230 .use_pmdown_time = 1,231 .endianness = 1,232};233 234int pcm1789_common_init(struct device *dev, struct regmap *regmap)235{236 struct pcm1789_private *pcm1789;237 238 pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),239 GFP_KERNEL);240 if (!pcm1789)241 return -ENOMEM;242 243 pcm1789->regmap = regmap;244 pcm1789->dev = dev;245 dev_set_drvdata(dev, pcm1789);246 247 pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);248 if (IS_ERR(pcm1789->reset))249 return PTR_ERR(pcm1789->reset);250 251 gpiod_set_value_cansleep(pcm1789->reset, 0);252 msleep(300);253 254 INIT_WORK(&pcm1789->work, pcm1789_work_queue);255 256 return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,257 &pcm1789_dai, 1);258}259EXPORT_SYMBOL_GPL(pcm1789_common_init);260 261void pcm1789_common_exit(struct device *dev)262{263 struct pcm1789_private *priv = dev_get_drvdata(dev);264 265 flush_work(&priv->work);266}267EXPORT_SYMBOL_GPL(pcm1789_common_exit);268 269MODULE_DESCRIPTION("ASoC PCM1789 driver");270MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");271MODULE_LICENSE("GPL");272