sound/soc/codecs/ak5558.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Audio driver for AK5558 ADC
   4 //
   5 // Copyright (C) 2015 Asahi Kasei Microdevices Corporation
   6 // Copyright 2018 NXP
   7
   8 #include <linux/delay.h>
   9 #include <linux/gpio/consumer.h>
  10 #include <linux/i2c.h>
  11 #include <linux/module.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/regmap.h>
  14 #include <linux/regulator/consumer.h>
  15 #include <linux/slab.h>
  16
  17 #include <sound/initval.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <sound/soc-dapm.h>
  22 #include <sound/tlv.h>
  23
  24 #include "ak5558.h"
  25
  26 #define AK5558_NUM_SUPPLIES 2
  27 static const char *ak5558_supply_names[AK5558_NUM_SUPPLIES] = {
  28         "DVDD",
  29         "AVDD",
  30 };
  31
  32 /* AK5558 Codec Private Data */
  33 struct ak5558_priv {
  34         struct regulator_bulk_data supplies[AK5558_NUM_SUPPLIES];
  35         struct snd_soc_component component;
  36         struct regmap *regmap;
  37         struct i2c_client *i2c;
  38         struct gpio_desc *reset_gpiod; /* Reset & Power down GPIO */
  39         int slots;
  40         int slot_width;
  41 };
  42
  43 /* ak5558 register cache & default register settings */
  44 static const struct reg_default ak5558_reg[] = {
  45         { 0x0, 0xFF },  /*      0x00    AK5558_00_POWER_MANAGEMENT1     */
  46         { 0x1, 0x01 },  /*      0x01    AK5558_01_POWER_MANAGEMENT2     */
  47         { 0x2, 0x01 },  /*      0x02    AK5558_02_CONTROL1              */
  48         { 0x3, 0x00 },  /*      0x03    AK5558_03_CONTROL2              */
  49         { 0x4, 0x00 },  /*      0x04    AK5558_04_CONTROL3              */
  50         { 0x5, 0x00 }   /*      0x05    AK5558_05_DSD                   */
  51 };
  52
  53 static const char * const mono_texts[] = {
  54         "8 Slot", "2 Slot", "4 Slot", "1 Slot",
  55 };
  56
  57 static const struct soc_enum ak5558_mono_enum[] = {
  58         SOC_ENUM_SINGLE(AK5558_01_POWER_MANAGEMENT2, 1,
  59                         ARRAY_SIZE(mono_texts), mono_texts),
  60 };
  61
  62 static const char * const digfil_texts[] = {
  63         "Sharp Roll-Off", "Show Roll-Off",
  64         "Short Delay Sharp Roll-Off", "Short Delay Show Roll-Off",
  65 };
  66
  67 static const struct soc_enum ak5558_adcset_enum[] = {
  68         SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
  69                         ARRAY_SIZE(digfil_texts), digfil_texts),
  70 };
  71
  72 static const struct snd_kcontrol_new ak5558_snd_controls[] = {
  73         SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
  74         SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[0]),
  75 };
  76
  77 static const struct snd_soc_dapm_widget ak5558_dapm_widgets[] = {
  78         /* Analog Input */
  79         SND_SOC_DAPM_INPUT("AIN1"),
  80         SND_SOC_DAPM_INPUT("AIN2"),
  81         SND_SOC_DAPM_INPUT("AIN3"),
  82         SND_SOC_DAPM_INPUT("AIN4"),
  83         SND_SOC_DAPM_INPUT("AIN5"),
  84         SND_SOC_DAPM_INPUT("AIN6"),
  85         SND_SOC_DAPM_INPUT("AIN7"),
  86         SND_SOC_DAPM_INPUT("AIN8"),
  87
  88         SND_SOC_DAPM_ADC("ADC Ch1", NULL, AK5558_00_POWER_MANAGEMENT1, 0, 0),
  89         SND_SOC_DAPM_ADC("ADC Ch2", NULL, AK5558_00_POWER_MANAGEMENT1, 1, 0),
  90         SND_SOC_DAPM_ADC("ADC Ch3", NULL, AK5558_00_POWER_MANAGEMENT1, 2, 0),
  91         SND_SOC_DAPM_ADC("ADC Ch4", NULL, AK5558_00_POWER_MANAGEMENT1, 3, 0),
  92         SND_SOC_DAPM_ADC("ADC Ch5", NULL, AK5558_00_POWER_MANAGEMENT1, 4, 0),
  93         SND_SOC_DAPM_ADC("ADC Ch6", NULL, AK5558_00_POWER_MANAGEMENT1, 5, 0),
  94         SND_SOC_DAPM_ADC("ADC Ch7", NULL, AK5558_00_POWER_MANAGEMENT1, 6, 0),
  95         SND_SOC_DAPM_ADC("ADC Ch8", NULL, AK5558_00_POWER_MANAGEMENT1, 7, 0),
  96
  97         SND_SOC_DAPM_AIF_OUT("SDTO", "Capture", 0, SND_SOC_NOPM, 0, 0),
  98 };
  99
 100 static const struct snd_soc_dapm_route ak5558_intercon[] = {
 101         {"ADC Ch1", NULL, "AIN1"},
 102         {"SDTO", NULL, "ADC Ch1"},
 103
 104         {"ADC Ch2", NULL, "AIN2"},
 105         {"SDTO", NULL, "ADC Ch2"},
 106
 107         {"ADC Ch3", NULL, "AIN3"},
 108         {"SDTO", NULL, "ADC Ch3"},
 109
 110         {"ADC Ch4", NULL, "AIN4"},
 111         {"SDTO", NULL, "ADC Ch4"},
 112
 113         {"ADC Ch5", NULL, "AIN5"},
 114         {"SDTO", NULL, "ADC Ch5"},
 115
 116         {"ADC Ch6", NULL, "AIN6"},
 117         {"SDTO", NULL, "ADC Ch6"},
 118
 119         {"ADC Ch7", NULL, "AIN7"},
 120         {"SDTO", NULL, "ADC Ch7"},
 121
 122         {"ADC Ch8", NULL, "AIN8"},
 123         {"SDTO", NULL, "ADC Ch8"},
 124 };
 125
 126 static int ak5558_set_mcki(struct snd_soc_component *component)
 127 {
 128         return snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_CKS,
 129                                    AK5558_CKS_AUTO);
 130 }
 131
 132 static int ak5558_hw_params(struct snd_pcm_substream *substream,
 133                             struct snd_pcm_hw_params *params,
 134                             struct snd_soc_dai *dai)
 135 {
 136         struct snd_soc_component *component = dai->component;
 137         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
 138         u8 bits;
 139         int pcm_width = max(params_physical_width(params), ak5558->slot_width);
 140
 141         switch (pcm_width) {
 142         case 16:
 143                 bits = AK5558_DIF_24BIT_MODE;
 144                 break;
 145         case 32:
 146                 bits = AK5558_DIF_32BIT_MODE;
 147                 break;
 148         default:
 149                 return -EINVAL;
 150         }
 151
 152         snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);
 153
 154         return 0;
 155 }
 156
 157 static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 158 {
 159         struct snd_soc_component *component = dai->component;
 160         u8 format;
 161
 162         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 163         case SND_SOC_DAIFMT_CBS_CFS:
 164                 break;
 165         case SND_SOC_DAIFMT_CBM_CFM:
 166                 break;
 167         case SND_SOC_DAIFMT_CBS_CFM:
 168         case SND_SOC_DAIFMT_CBM_CFS:
 169         default:
 170                 dev_err(dai->dev, "Clock mode unsupported");
 171                 return -EINVAL;
 172         }
 173
 174         /* set master/slave audio interface */
 175         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 176         case SND_SOC_DAIFMT_I2S:
 177                 format = AK5558_DIF_I2S_MODE;
 178                 break;
 179         case SND_SOC_DAIFMT_LEFT_J:
 180                 format = AK5558_DIF_MSB_MODE;
 181                 break;
 182         case SND_SOC_DAIFMT_DSP_B:
 183                 format = AK5558_DIF_MSB_MODE;
 184                 break;
 185         default:
 186                 return -EINVAL;
 187         }
 188
 189         snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_DIF, format);
 190
 191         return 0;
 192 }
 193
 194 static int ak5558_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 195                                unsigned int rx_mask, int slots,
 196                                int slot_width)
 197 {
 198         struct snd_soc_component *component = dai->component;
 199         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
 200         int tdm_mode;
 201
 202         ak5558->slots = slots;
 203         ak5558->slot_width = slot_width;
 204
 205         switch (slots * slot_width) {
 206         case 128:
 207                 tdm_mode = AK5558_MODE_TDM128;
 208                 break;
 209         case 256:
 210                 tdm_mode = AK5558_MODE_TDM256;
 211                 break;
 212         case 512:
 213                 tdm_mode = AK5558_MODE_TDM512;
 214                 break;
 215         default:
 216                 tdm_mode = AK5558_MODE_NORMAL;
 217                 break;
 218         }
 219
 220         snd_soc_component_update_bits(component, AK5558_03_CONTROL2, AK5558_MODE_BITS,
 221                             tdm_mode);
 222         return 0;
 223 }
 224
 225 #define AK5558_FORMATS  (SNDRV_PCM_FMTBIT_S16_LE |\
 226                          SNDRV_PCM_FMTBIT_S24_LE |\
 227                          SNDRV_PCM_FMTBIT_S32_LE)
 228
 229 static const unsigned int ak5558_rates[] = {
 230         8000, 11025,  16000, 22050,
 231         32000, 44100, 48000, 88200,
 232         96000, 176400, 192000, 352800,
 233         384000, 705600, 768000, 1411200,
 234         2822400,
 235 };
 236
 237 static const struct snd_pcm_hw_constraint_list ak5558_rate_constraints = {
 238         .count = ARRAY_SIZE(ak5558_rates),
 239         .list = ak5558_rates,
 240 };
 241
 242 static int ak5558_startup(struct snd_pcm_substream *substream,
 243                           struct snd_soc_dai *dai)
 244 {
 245         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 246                                           SNDRV_PCM_HW_PARAM_RATE,
 247                                           &ak5558_rate_constraints);
 248 }
 249
 250 static const struct snd_soc_dai_ops ak5558_dai_ops = {
 251         .startup        = ak5558_startup,
 252         .hw_params      = ak5558_hw_params,
 253
 254         .set_fmt        = ak5558_set_dai_fmt,
 255         .set_tdm_slot   = ak5558_set_tdm_slot,
 256 };
 257
 258 static struct snd_soc_dai_driver ak5558_dai = {
 259         .name = "ak5558-aif",
 260         .capture = {
 261                 .stream_name = "Capture",
 262                 .channels_min = 1,
 263                 .channels_max = 8,
 264                 .rates = SNDRV_PCM_RATE_KNOT,
 265                 .formats = AK5558_FORMATS,
 266         },
 267         .ops = &ak5558_dai_ops,
 268 };
 269
 270 static void ak5558_power_off(struct ak5558_priv *ak5558)
 271 {
 272         if (!ak5558->reset_gpiod)
 273                 return;
 274
 275         gpiod_set_value_cansleep(ak5558->reset_gpiod, 0);
 276         usleep_range(1000, 2000);
 277 }
 278
 279 static void ak5558_power_on(struct ak5558_priv *ak5558)
 280 {
 281         if (!ak5558->reset_gpiod)
 282                 return;
 283
 284         gpiod_set_value_cansleep(ak5558->reset_gpiod, 1);
 285         usleep_range(1000, 2000);
 286 }
 287
 288 static int ak5558_probe(struct snd_soc_component *component)
 289 {
 290         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
 291
 292         ak5558_power_on(ak5558);
 293         return ak5558_set_mcki(component);
 294 }
 295
 296 static void ak5558_remove(struct snd_soc_component *component)
 297 {
 298         struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
 299
 300         ak5558_power_off(ak5558);
 301 }
 302
 303 static int __maybe_unused ak5558_runtime_suspend(struct device *dev)
 304 {
 305         struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
 306
 307         regcache_cache_only(ak5558->regmap, true);
 308         ak5558_power_off(ak5558);
 309
 310         regulator_bulk_disable(ARRAY_SIZE(ak5558->supplies),
 311                                ak5558->supplies);
 312         return 0;
 313 }
 314
 315 static int __maybe_unused ak5558_runtime_resume(struct device *dev)
 316 {
 317         struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
 318         int ret;
 319
 320         ret = regulator_bulk_enable(ARRAY_SIZE(ak5558->supplies),
 321                                     ak5558->supplies);
 322         if (ret != 0) {
 323                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
 324                 return ret;
 325         }
 326
 327         ak5558_power_off(ak5558);
 328         ak5558_power_on(ak5558);
 329
 330         regcache_cache_only(ak5558->regmap, false);
 331         regcache_mark_dirty(ak5558->regmap);
 332
 333         return regcache_sync(ak5558->regmap);
 334 }
 335
 336 static const struct dev_pm_ops ak5558_pm = {
 337         SET_RUNTIME_PM_OPS(ak5558_runtime_suspend, ak5558_runtime_resume, NULL)
 338         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 339                                 pm_runtime_force_resume)
 340 };
 341
 342 static const struct snd_soc_component_driver soc_codec_dev_ak5558 = {
 343         .probe                  = ak5558_probe,
 344         .remove                 = ak5558_remove,
 345         .controls               = ak5558_snd_controls,
 346         .num_controls           = ARRAY_SIZE(ak5558_snd_controls),
 347         .dapm_widgets           = ak5558_dapm_widgets,
 348         .num_dapm_widgets       = ARRAY_SIZE(ak5558_dapm_widgets),
 349         .dapm_routes            = ak5558_intercon,
 350         .num_dapm_routes        = ARRAY_SIZE(ak5558_intercon),
 351         .idle_bias_on           = 1,
 352         .use_pmdown_time        = 1,
 353         .endianness             = 1,
 354         .non_legacy_dai_naming  = 1,
 355 };
 356
 357 static const struct regmap_config ak5558_regmap = {
 358         .reg_bits = 8,
 359         .val_bits = 8,
 360
 361         .max_register = AK5558_05_DSD,
 362         .reg_defaults = ak5558_reg,
 363         .num_reg_defaults = ARRAY_SIZE(ak5558_reg),
 364         .cache_type = REGCACHE_RBTREE,
 365 };
 366
 367 static int ak5558_i2c_probe(struct i2c_client *i2c)
 368 {
 369         struct ak5558_priv *ak5558;
 370         int ret = 0;
 371         int i;
 372
 373         ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL);
 374         if (!ak5558)
 375                 return -ENOMEM;
 376
 377         ak5558->regmap = devm_regmap_init_i2c(i2c, &ak5558_regmap);
 378         if (IS_ERR(ak5558->regmap))
 379                 return PTR_ERR(ak5558->regmap);
 380
 381         i2c_set_clientdata(i2c, ak5558);
 382         ak5558->i2c = i2c;
 383
 384         ak5558->reset_gpiod = devm_gpiod_get_optional(&i2c->dev, "reset",
 385                                                       GPIOD_OUT_LOW);
 386         if (IS_ERR(ak5558->reset_gpiod))
 387                 return PTR_ERR(ak5558->reset_gpiod);
 388
 389         for (i = 0; i < ARRAY_SIZE(ak5558->supplies); i++)
 390                 ak5558->supplies[i].supply = ak5558_supply_names[i];
 391
 392         ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(ak5558->supplies),
 393                                       ak5558->supplies);
 394         if (ret != 0) {
 395                 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
 396                 return ret;
 397         }
 398
 399         ret = devm_snd_soc_register_component(&i2c->dev,
 400                                      &soc_codec_dev_ak5558,
 401                                      &ak5558_dai, 1);
 402         if (ret)
 403                 return ret;
 404
 405         pm_runtime_enable(&i2c->dev);
 406         regcache_cache_only(ak5558->regmap, true);
 407
 408         return 0;
 409 }
 410
 411 static int ak5558_i2c_remove(struct i2c_client *i2c)
 412 {
 413         pm_runtime_disable(&i2c->dev);
 414
 415         return 0;
 416 }
 417
 418 static const struct of_device_id ak5558_i2c_dt_ids[] __maybe_unused = {
 419         { .compatible = "asahi-kasei,ak5558"},
 420         { }
 421 };
 422
 423 static struct i2c_driver ak5558_i2c_driver = {
 424         .driver = {
 425                 .name = "ak5558",
 426                 .of_match_table = of_match_ptr(ak5558_i2c_dt_ids),
 427                 .pm = &ak5558_pm,
 428         },
 429         .probe_new = ak5558_i2c_probe,
 430         .remove = ak5558_i2c_remove,
 431 };
 432
 433 module_i2c_driver(ak5558_i2c_driver);
 434
 435 MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
 436 MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
 437 MODULE_DESCRIPTION("ASoC AK5558 ADC driver");
 438 MODULE_LICENSE("GPL v2");