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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * MAX98504 ALSA SoC Audio driver4 *5 * Copyright 2013 - 2014 Maxim Integrated Products6 * Copyright 2016 Samsung Electronics Co., Ltd.7 */8 9#include <linux/delay.h>10#include <linux/i2c.h>11#include <linux/module.h>12#include <linux/regulator/consumer.h>13#include <linux/slab.h>14#include <linux/types.h>15#include <sound/soc.h>16 17#include "max98504.h"18 19static const char * const max98504_supply_names[] = {20 "DVDD",21 "DIOVDD",22 "PVDD",23};24#define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)25 26struct max98504_priv {27 struct regmap *regmap;28 struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];29 unsigned int pcm_rx_channels;30 bool brownout_enable;31 unsigned int brownout_threshold;32 unsigned int brownout_attenuation;33 unsigned int brownout_attack_hold;34 unsigned int brownout_timed_hold;35 unsigned int brownout_release_rate;36};37 38static struct reg_default max98504_reg_defaults[] = {39 { 0x01, 0},40 { 0x02, 0},41 { 0x03, 0},42 { 0x04, 0},43 { 0x10, 0},44 { 0x11, 0},45 { 0x12, 0},46 { 0x13, 0},47 { 0x14, 0},48 { 0x15, 0},49 { 0x16, 0},50 { 0x17, 0},51 { 0x18, 0},52 { 0x19, 0},53 { 0x1A, 0},54 { 0x20, 0},55 { 0x21, 0},56 { 0x22, 0},57 { 0x23, 0},58 { 0x24, 0},59 { 0x25, 0},60 { 0x26, 0},61 { 0x27, 0},62 { 0x28, 0},63 { 0x30, 0},64 { 0x31, 0},65 { 0x32, 0},66 { 0x33, 0},67 { 0x34, 0},68 { 0x35, 0},69 { 0x36, 0},70 { 0x37, 0},71 { 0x38, 0},72 { 0x39, 0},73 { 0x40, 0},74 { 0x41, 0},75};76 77static bool max98504_volatile_register(struct device *dev, unsigned int reg)78{79 switch (reg) {80 case MAX98504_INTERRUPT_STATUS:81 case MAX98504_INTERRUPT_FLAGS:82 case MAX98504_INTERRUPT_FLAG_CLEARS:83 case MAX98504_WATCHDOG_CLEAR:84 case MAX98504_GLOBAL_ENABLE:85 case MAX98504_SOFTWARE_RESET:86 return true;87 default:88 return false;89 }90}91 92static bool max98504_readable_register(struct device *dev, unsigned int reg)93{94 switch (reg) {95 case MAX98504_SOFTWARE_RESET:96 case MAX98504_WATCHDOG_CLEAR:97 case MAX98504_INTERRUPT_FLAG_CLEARS:98 return false;99 default:100 return true;101 }102}103 104static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,105 struct snd_kcontrol *kcontrol, int event)106{107 struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);108 struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);109 110 switch (event) {111 case SND_SOC_DAPM_PRE_PMU:112 regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,113 max98504->pcm_rx_channels);114 break;115 case SND_SOC_DAPM_POST_PMD:116 regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);117 break;118 }119 120 return 0;121}122 123static int max98504_component_probe(struct snd_soc_component *c)124{125 struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);126 struct regmap *map = max98504->regmap;127 int ret;128 129 ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);130 if (ret < 0)131 return ret;132 133 regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);134 msleep(20);135 136 if (!max98504->brownout_enable)137 return 0;138 139 regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);140 141 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,142 (max98504->brownout_threshold & 0x1f) << 3 |143 (max98504->brownout_attenuation & 0x3));144 145 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,146 max98504->brownout_attack_hold & 0xff);147 148 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,149 max98504->brownout_timed_hold & 0xff);150 151 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,152 max98504->brownout_release_rate & 0xff);153 154 return 0;155}156 157static void max98504_component_remove(struct snd_soc_component *c)158{159 struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);160 161 regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);162}163 164static const char *spk_source_mux_text[] = {165 "PCM Monomix", "Analog In", "PDM Left", "PDM Right"166};167 168static const struct soc_enum spk_source_mux_enum =169 SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,170 0, ARRAY_SIZE(spk_source_mux_text),171 spk_source_mux_text);172 173static const struct snd_kcontrol_new spk_source_mux =174 SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);175 176static const struct snd_soc_dapm_route max98504_dapm_routes[] = {177 { "SPKOUT", NULL, "Global Enable" },178 { "SPK Source", "PCM Monomix", "DAC PCM" },179 { "SPK Source", "Analog In", "AIN" },180 { "SPK Source", "PDM Left", "DAC PDM" },181 { "SPK Source", "PDM Right", "DAC PDM" },182};183 184static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {185 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,186 0, 0, NULL, 0),187 SND_SOC_DAPM_INPUT("AIN"),188 SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),189 SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),190 SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,191 max98504_pcm_rx_ev,192 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),193 SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),194 SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),195 SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",196 MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),197};198 199static int max98504_set_tdm_slot(struct snd_soc_dai *dai,200 unsigned int tx_mask, unsigned int rx_mask,201 int slots, int slot_width)202{203 struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);204 struct regmap *map = max98504->regmap;205 206 207 switch (dai->id) {208 case MAX98504_DAI_ID_PCM:209 regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);210 max98504->pcm_rx_channels = rx_mask;211 break;212 213 case MAX98504_DAI_ID_PDM:214 regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);215 break;216 default:217 WARN_ON(1);218 }219 220 return 0;221}222static int max98504_set_channel_map(struct snd_soc_dai *dai,223 unsigned int tx_num,224 const unsigned int *tx_slot,225 unsigned int rx_num,226 const unsigned int *rx_slot)227{228 struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);229 struct regmap *map = max98504->regmap;230 unsigned int i, sources = 0;231 232 for (i = 0; i < tx_num; i++)233 if (tx_slot[i])234 sources |= (1 << i);235 236 switch (dai->id) {237 case MAX98504_DAI_ID_PCM:238 regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,239 sources);240 break;241 242 case MAX98504_DAI_ID_PDM:243 regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);244 break;245 default:246 WARN_ON(1);247 }248 249 regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);250 251 return 0;252}253 254static const struct snd_soc_dai_ops max98504_dai_ops = {255 .set_tdm_slot = max98504_set_tdm_slot,256 .set_channel_map = max98504_set_channel_map,257};258 259#define MAX98504_FORMATS (SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\260 SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)261#define MAX98504_PDM_RATES (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\262 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\263 SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\264 SNDRV_PCM_RATE_96000)265 266static struct snd_soc_dai_driver max98504_dai[] = {267 /* TODO: Add the PCM interface definitions */268 {269 .name = "max98504-aif2",270 .id = MAX98504_DAI_ID_PDM,271 .playback = {272 .stream_name = "AIF2 Playback",273 .channels_min = 1,274 .channels_max = 2,275 .rates = MAX98504_PDM_RATES,276 .formats = MAX98504_FORMATS,277 },278 .capture = {279 .stream_name = "AIF2 Capture",280 .channels_min = 1,281 .channels_max = 2,282 .rates = MAX98504_PDM_RATES,283 .formats = MAX98504_FORMATS,284 },285 .ops = &max98504_dai_ops,286 },287};288 289static const struct snd_soc_component_driver max98504_component_driver = {290 .probe = max98504_component_probe,291 .remove = max98504_component_remove,292 .dapm_widgets = max98504_dapm_widgets,293 .num_dapm_widgets = ARRAY_SIZE(max98504_dapm_widgets),294 .dapm_routes = max98504_dapm_routes,295 .num_dapm_routes = ARRAY_SIZE(max98504_dapm_routes),296 .endianness = 1,297};298 299static const struct regmap_config max98504_regmap = {300 .reg_bits = 16,301 .val_bits = 8,302 .max_register = MAX98504_MAX_REGISTER,303 .reg_defaults = max98504_reg_defaults,304 .num_reg_defaults = ARRAY_SIZE(max98504_reg_defaults),305 .volatile_reg = max98504_volatile_register,306 .readable_reg = max98504_readable_register,307 .cache_type = REGCACHE_RBTREE,308};309 310static int max98504_i2c_probe(struct i2c_client *client)311{312 struct device *dev = &client->dev;313 struct device_node *node = dev->of_node;314 struct max98504_priv *max98504;315 int i, ret;316 317 max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);318 if (!max98504)319 return -ENOMEM;320 321 if (node) {322 if (!of_property_read_u32(node, "maxim,brownout-threshold",323 &max98504->brownout_threshold))324 max98504->brownout_enable = true;325 326 of_property_read_u32(node, "maxim,brownout-attenuation",327 &max98504->brownout_attenuation);328 of_property_read_u32(node, "maxim,brownout-attack-hold-ms",329 &max98504->brownout_attack_hold);330 of_property_read_u32(node, "maxim,brownout-timed-hold-ms",331 &max98504->brownout_timed_hold);332 of_property_read_u32(node, "maxim,brownout-release-rate-ms",333 &max98504->brownout_release_rate);334 }335 336 max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);337 if (IS_ERR(max98504->regmap)) {338 ret = PTR_ERR(max98504->regmap);339 dev_err(&client->dev, "regmap initialization failed: %d\n", ret);340 return ret;341 }342 343 for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)344 max98504->supplies[i].supply = max98504_supply_names[i];345 346 ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,347 max98504->supplies);348 if (ret < 0)349 return ret;350 351 i2c_set_clientdata(client, max98504);352 353 return devm_snd_soc_register_component(dev, &max98504_component_driver,354 max98504_dai, ARRAY_SIZE(max98504_dai));355}356 357#ifdef CONFIG_OF358static const struct of_device_id max98504_of_match[] = {359 { .compatible = "maxim,max98504" },360 { },361};362MODULE_DEVICE_TABLE(of, max98504_of_match);363#endif364 365static const struct i2c_device_id max98504_i2c_id[] = {366 { "max98504" },367 { }368};369MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);370 371static struct i2c_driver max98504_i2c_driver = {372 .driver = {373 .name = "max98504",374 .of_match_table = of_match_ptr(max98504_of_match),375 },376 .probe = max98504_i2c_probe,377 .id_table = max98504_i2c_id,378};379module_i2c_driver(max98504_i2c_driver);380 381MODULE_DESCRIPTION("ASoC MAX98504 driver");382MODULE_LICENSE("GPL");383