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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * max9850.c -- codec driver for max98504 *5 * Copyright (C) 2011 taskit GmbH6 *7 * Author: Christian Glindkamp <christian.glindkamp@taskit.de>8 *9 * Initial development of this code was funded by10 * MICRONIC Computer Systeme GmbH, https://www.mcsberlin.de/11 */12 13#include <linux/module.h>14#include <linux/init.h>15#include <linux/i2c.h>16#include <linux/regmap.h>17#include <linux/slab.h>18#include <sound/pcm.h>19#include <sound/pcm_params.h>20#include <sound/soc.h>21#include <sound/tlv.h>22 23#include "max9850.h"24 25struct max9850_priv {26 struct regmap *regmap;27 unsigned int sysclk;28};29 30/* these registers are not used at the moment but provided for the sake of31 * completeness */32static bool max9850_volatile_register(struct device *dev, unsigned int reg)33{34 switch (reg) {35 case MAX9850_STATUSA:36 case MAX9850_STATUSB:37 return true;38 default:39 return false;40 }41}42 43static const struct regmap_config max9850_regmap = {44 .reg_bits = 8,45 .val_bits = 8,46 47 .max_register = MAX9850_DIGITAL_AUDIO,48 .volatile_reg = max9850_volatile_register,49 .cache_type = REGCACHE_RBTREE,50};51 52static const DECLARE_TLV_DB_RANGE(max9850_tlv,53 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),54 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),55 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),56 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)57);58 59static const struct snd_kcontrol_new max9850_controls[] = {60SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),61SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),62SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),63};64 65static const struct snd_kcontrol_new max9850_mixer_controls[] = {66 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),67};68 69static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {70SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),71SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),72SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),73SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),74SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,75 &max9850_mixer_controls[0],76 ARRAY_SIZE(max9850_mixer_controls)),77SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),78SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),79SND_SOC_DAPM_OUTPUT("OUTL"),80SND_SOC_DAPM_OUTPUT("HPL"),81SND_SOC_DAPM_OUTPUT("OUTR"),82SND_SOC_DAPM_OUTPUT("HPR"),83SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),84SND_SOC_DAPM_INPUT("INL"),85SND_SOC_DAPM_INPUT("INR"),86};87 88static const struct snd_soc_dapm_route max9850_dapm_routes[] = {89 /* output mixer */90 {"Output Mixer", NULL, "DAC"},91 {"Output Mixer", "Line In Switch", "Line Input"},92 93 /* outputs */94 {"Headphone Output", NULL, "Output Mixer"},95 {"HPL", NULL, "Headphone Output"},96 {"HPR", NULL, "Headphone Output"},97 {"OUTL", NULL, "Output Mixer"},98 {"OUTR", NULL, "Output Mixer"},99 100 /* inputs */101 {"Line Input", NULL, "INL"},102 {"Line Input", NULL, "INR"},103 104 /* supplies */105 {"Output Mixer", NULL, "Charge Pump 1"},106 {"Output Mixer", NULL, "Charge Pump 2"},107 {"Output Mixer", NULL, "SHDN"},108 {"DAC", NULL, "MCLK"},109};110 111static int max9850_hw_params(struct snd_pcm_substream *substream,112 struct snd_pcm_hw_params *params,113 struct snd_soc_dai *dai)114{115 struct snd_soc_component *component = dai->component;116 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);117 u64 lrclk_div;118 u8 sf, da;119 120 if (!max9850->sysclk)121 return -EINVAL;122 123 /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */124 sf = (snd_soc_component_read(component, MAX9850_CLOCK) >> 2) + 1;125 lrclk_div = (1 << 22);126 lrclk_div *= params_rate(params);127 lrclk_div *= sf;128 do_div(lrclk_div, max9850->sysclk);129 130 snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);131 snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0xff);132 133 switch (params_width(params)) {134 case 16:135 da = 0;136 break;137 case 20:138 da = 0x2;139 break;140 case 24:141 da = 0x3;142 break;143 default:144 return -EINVAL;145 }146 snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0x3, da);147 148 return 0;149}150 151static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,152 int clk_id, unsigned int freq, int dir)153{154 struct snd_soc_component *component = codec_dai->component;155 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);156 157 /* calculate mclk -> iclk divider */158 if (freq <= 13000000)159 snd_soc_component_write(component, MAX9850_CLOCK, 0x0);160 else if (freq <= 26000000)161 snd_soc_component_write(component, MAX9850_CLOCK, 0x4);162 else if (freq <= 40000000)163 snd_soc_component_write(component, MAX9850_CLOCK, 0x8);164 else165 return -EINVAL;166 167 max9850->sysclk = freq;168 return 0;169}170 171static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)172{173 struct snd_soc_component *component = codec_dai->component;174 u8 da = 0;175 176 /* set clock provider for audio interface */177 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {178 case SND_SOC_DAIFMT_CBP_CFP:179 da |= MAX9850_MASTER;180 break;181 case SND_SOC_DAIFMT_CBC_CFC:182 break;183 default:184 return -EINVAL;185 }186 187 /* interface format */188 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {189 case SND_SOC_DAIFMT_I2S:190 da |= MAX9850_DLY;191 break;192 case SND_SOC_DAIFMT_RIGHT_J:193 da |= MAX9850_RTJ;194 break;195 case SND_SOC_DAIFMT_LEFT_J:196 break;197 default:198 return -EINVAL;199 }200 201 /* clock inversion */202 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {203 case SND_SOC_DAIFMT_NB_NF:204 break;205 case SND_SOC_DAIFMT_IB_IF:206 da |= MAX9850_BCINV | MAX9850_INV;207 break;208 case SND_SOC_DAIFMT_IB_NF:209 da |= MAX9850_BCINV;210 break;211 case SND_SOC_DAIFMT_NB_IF:212 da |= MAX9850_INV;213 break;214 default:215 return -EINVAL;216 }217 218 /* set da */219 snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);220 221 return 0;222}223 224static int max9850_set_bias_level(struct snd_soc_component *component,225 enum snd_soc_bias_level level)226{227 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);228 int ret;229 230 switch (level) {231 case SND_SOC_BIAS_ON:232 break;233 case SND_SOC_BIAS_PREPARE:234 break;235 case SND_SOC_BIAS_STANDBY:236 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {237 ret = regcache_sync(max9850->regmap);238 if (ret) {239 dev_err(component->dev,240 "Failed to sync cache: %d\n", ret);241 return ret;242 }243 }244 break;245 case SND_SOC_BIAS_OFF:246 break;247 }248 return 0;249}250 251#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000252 253#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\254 SNDRV_PCM_FMTBIT_S24_LE)255 256static const struct snd_soc_dai_ops max9850_dai_ops = {257 .hw_params = max9850_hw_params,258 .set_sysclk = max9850_set_dai_sysclk,259 .set_fmt = max9850_set_dai_fmt,260};261 262static struct snd_soc_dai_driver max9850_dai = {263 .name = "max9850-hifi",264 .playback = {265 .stream_name = "Playback",266 .channels_min = 1,267 .channels_max = 2,268 .rates = MAX9850_RATES,269 .formats = MAX9850_FORMATS270 },271 .ops = &max9850_dai_ops,272};273 274static int max9850_probe(struct snd_soc_component *component)275{276 /* enable zero-detect */277 snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);278 /* enable slew-rate control */279 snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);280 /* set slew-rate 125ms */281 snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);282 283 return 0;284}285 286static const struct snd_soc_component_driver soc_component_dev_max9850 = {287 .probe = max9850_probe,288 .set_bias_level = max9850_set_bias_level,289 .controls = max9850_controls,290 .num_controls = ARRAY_SIZE(max9850_controls),291 .dapm_widgets = max9850_dapm_widgets,292 .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),293 .dapm_routes = max9850_dapm_routes,294 .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),295 .suspend_bias_off = 1,296 .idle_bias_on = 1,297 .use_pmdown_time = 1,298 .endianness = 1,299};300 301static int max9850_i2c_probe(struct i2c_client *i2c)302{303 struct max9850_priv *max9850;304 int ret;305 306 max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),307 GFP_KERNEL);308 if (max9850 == NULL)309 return -ENOMEM;310 311 max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);312 if (IS_ERR(max9850->regmap))313 return PTR_ERR(max9850->regmap);314 315 i2c_set_clientdata(i2c, max9850);316 317 ret = devm_snd_soc_register_component(&i2c->dev,318 &soc_component_dev_max9850, &max9850_dai, 1);319 return ret;320}321 322static const struct i2c_device_id max9850_i2c_id[] = {323 { "max9850" },324 { }325};326MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);327 328static struct i2c_driver max9850_i2c_driver = {329 .driver = {330 .name = "max9850",331 },332 .probe = max9850_i2c_probe,333 .id_table = max9850_i2c_id,334};335 336module_i2c_driver(max9850_i2c_driver);337 338MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");339MODULE_DESCRIPTION("ASoC MAX9850 codec driver");340MODULE_LICENSE("GPL");341