kernel/sound/soc/codecs/tas571x.c

   1 /*
   2  * TAS571x amplifier audio driver
   3  *
   4  * Copyright (C) 2015 Google, Inc.
   5  * Copyright (c) 2013 Daniel Mack <zonque@gmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/delay.h>
  15 #include <linux/device.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/i2c.h>
  18 #include <linux/init.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/of_device.h>
  22 #include <linux/regmap.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/stddef.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/tlv.h>
  28
  29 #include "tas571x.h"
  30
  31 #define TAS571X_MAX_SUPPLIES            6
  32
  33 struct tas571x_chip {
  34         const char                      *const *supply_names;
  35         int                             num_supply_names;
  36         const struct snd_kcontrol_new   *controls;
  37         int                             num_controls;
  38         const struct regmap_config      *regmap_config;
  39         int                             vol_reg_size;
  40 };
  41
  42 struct tas571x_private {
  43         const struct tas571x_chip       *chip;
  44         struct regmap                   *regmap;
  45         struct regulator_bulk_data      supplies[TAS571X_MAX_SUPPLIES];
  46         struct clk                      *mclk;
  47         unsigned int                    format;
  48         struct gpio_desc                *reset_gpio;
  49         struct gpio_desc                *pdn_gpio;
  50         struct snd_soc_codec_driver     codec_driver;
  51 };
  52
  53 static int tas571x_register_size(struct tas571x_private *priv, unsigned int reg)
  54 {
  55         switch (reg) {
  56         case TAS571X_MVOL_REG:
  57         case TAS571X_CH1_VOL_REG:
  58         case TAS571X_CH2_VOL_REG:
  59                 return priv->chip->vol_reg_size;
  60         default:
  61                 return 1;
  62         }
  63 }
  64
  65 static int tas571x_reg_write(void *context, unsigned int reg,
  66                              unsigned int value)
  67 {
  68         struct i2c_client *client = context;
  69         struct tas571x_private *priv = i2c_get_clientdata(client);
  70         unsigned int i, size;
  71         uint8_t buf[5];
  72         int ret;
  73
  74         size = tas571x_register_size(priv, reg);
  75         buf[0] = reg;
  76
  77         for (i = size; i >= 1; --i) {
  78                 buf[i] = value;
  79                 value >>= 8;
  80         }
  81
  82         ret = i2c_master_send(client, buf, size + 1);
  83         if (ret == size + 1)
  84                 return 0;
  85         else if (ret < 0)
  86                 return ret;
  87         else
  88                 return -EIO;
  89 }
  90
  91 static int tas571x_reg_read(void *context, unsigned int reg,
  92                             unsigned int *value)
  93 {
  94         struct i2c_client *client = context;
  95         struct tas571x_private *priv = i2c_get_clientdata(client);
  96         uint8_t send_buf, recv_buf[4];
  97         struct i2c_msg msgs[2];
  98         unsigned int size;
  99         unsigned int i;
 100         int ret;
 101
 102         size = tas571x_register_size(priv, reg);
 103         send_buf = reg;
 104
 105         msgs[0].addr = client->addr;
 106         msgs[0].len = sizeof(send_buf);
 107         msgs[0].buf = &send_buf;
 108         msgs[0].flags = 0;
 109
 110         msgs[1].addr = client->addr;
 111         msgs[1].len = size;
 112         msgs[1].buf = recv_buf;
 113         msgs[1].flags = I2C_M_RD;
 114
 115         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 116         if (ret < 0)
 117                 return ret;
 118         else if (ret != ARRAY_SIZE(msgs))
 119                 return -EIO;
 120
 121         *value = 0;
 122
 123         for (i = 0; i < size; i++) {
 124                 *value <<= 8;
 125                 *value |= recv_buf[i];
 126         }
 127
 128         return 0;
 129 }
 130
 131 static int tas571x_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)
 132 {
 133         struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
 134
 135         priv->format = format;
 136
 137         return 0;
 138 }
 139
 140 static int tas571x_hw_params(struct snd_pcm_substream *substream,
 141                              struct snd_pcm_hw_params *params,
 142                              struct snd_soc_dai *dai)
 143 {
 144         struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
 145         u32 val;
 146
 147         switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
 148         case SND_SOC_DAIFMT_RIGHT_J:
 149                 val = 0x00;
 150                 break;
 151         case SND_SOC_DAIFMT_I2S:
 152                 val = 0x03;
 153                 break;
 154         case SND_SOC_DAIFMT_LEFT_J:
 155                 val = 0x06;
 156                 break;
 157         default:
 158                 return -EINVAL;
 159         }
 160
 161         if (params_width(params) >= 24)
 162                 val += 2;
 163         else if (params_width(params) >= 20)
 164                 val += 1;
 165
 166         return regmap_update_bits(priv->regmap, TAS571X_SDI_REG,
 167                                   TAS571X_SDI_FMT_MASK, val);
 168 }
 169
 170 static int tas571x_set_bias_level(struct snd_soc_codec *codec,
 171                                   enum snd_soc_bias_level level)
 172 {
 173         struct tas571x_private *priv = snd_soc_codec_get_drvdata(codec);
 174         int ret;
 175
 176         switch (level) {
 177         case SND_SOC_BIAS_ON:
 178                 break;
 179         case SND_SOC_BIAS_PREPARE:
 180                 break;
 181         case SND_SOC_BIAS_STANDBY:
 182                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 183                         if (!IS_ERR(priv->mclk)) {
 184                                 ret = clk_prepare_enable(priv->mclk);
 185                                 if (ret) {
 186                                         dev_err(codec->dev,
 187                                                 "Failed to enable master clock: %d\n",
 188                                                 ret);
 189                                         return ret;
 190                                 }
 191                         }
 192
 193                         gpiod_set_value(priv->pdn_gpio, 0);
 194                         usleep_range(5000, 6000);
 195
 196                         regcache_cache_only(priv->regmap, false);
 197                         ret = regcache_sync(priv->regmap);
 198                         if (ret)
 199                                 return ret;
 200                 }
 201                 break;
 202         case SND_SOC_BIAS_OFF:
 203                 regcache_cache_only(priv->regmap, true);
 204                 gpiod_set_value(priv->pdn_gpio, 1);
 205
 206                 if (!IS_ERR(priv->mclk))
 207                         clk_disable_unprepare(priv->mclk);
 208                 break;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static const struct snd_soc_dai_ops tas571x_dai_ops = {
 215         .set_fmt        = tas571x_set_dai_fmt,
 216         .hw_params      = tas571x_hw_params,
 217 };
 218
 219 static const char *const tas5711_supply_names[] = {
 220         "AVDD",
 221         "DVDD",
 222         "PVDD_A",
 223         "PVDD_B",
 224         "PVDD_C",
 225         "PVDD_D",
 226 };
 227
 228 static const DECLARE_TLV_DB_SCALE(tas5711_volume_tlv, -10350, 50, 1);
 229
 230 static const struct snd_kcontrol_new tas5711_controls[] = {
 231         SOC_SINGLE_TLV("Master Volume",
 232                        TAS571X_MVOL_REG,
 233                        0, 0xff, 1, tas5711_volume_tlv),
 234         SOC_DOUBLE_R_TLV("Speaker Volume",
 235                          TAS571X_CH1_VOL_REG,
 236                          TAS571X_CH2_VOL_REG,
 237                          0, 0xff, 1, tas5711_volume_tlv),
 238         SOC_DOUBLE("Speaker Switch",
 239                    TAS571X_SOFT_MUTE_REG,
 240                    TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
 241                    1, 1),
 242 };
 243
 244 static const struct reg_default tas5711_reg_defaults[] = {
 245         { 0x04, 0x05 },
 246         { 0x05, 0x40 },
 247         { 0x06, 0x00 },
 248         { 0x07, 0xff },
 249         { 0x08, 0x30 },
 250         { 0x09, 0x30 },
 251         { 0x1b, 0x82 },
 252 };
 253
 254 static const struct regmap_config tas5711_regmap_config = {
 255         .reg_bits                       = 8,
 256         .val_bits                       = 32,
 257         .max_register                   = 0xff,
 258         .reg_read                       = tas571x_reg_read,
 259         .reg_write                      = tas571x_reg_write,
 260         .reg_defaults                   = tas5711_reg_defaults,
 261         .num_reg_defaults               = ARRAY_SIZE(tas5711_reg_defaults),
 262         .cache_type                     = REGCACHE_RBTREE,
 263 };
 264
 265 static const struct tas571x_chip tas5711_chip = {
 266         .supply_names                   = tas5711_supply_names,
 267         .num_supply_names               = ARRAY_SIZE(tas5711_supply_names),
 268         .controls                       = tas5711_controls,
 269         .num_controls                   = ARRAY_SIZE(tas5711_controls),
 270         .regmap_config                  = &tas5711_regmap_config,
 271         .vol_reg_size                   = 1,
 272 };
 273
 274 static const char *const tas5717_supply_names[] = {
 275         "AVDD",
 276         "DVDD",
 277         "HPVDD",
 278         "PVDD_AB",
 279         "PVDD_CD",
 280 };
 281
 282 static const DECLARE_TLV_DB_SCALE(tas5717_volume_tlv, -10375, 25, 0);
 283
 284 static const struct snd_kcontrol_new tas5717_controls[] = {
 285         /* MVOL LSB is ignored - see comments in tas571x_i2c_probe() */
 286         SOC_SINGLE_TLV("Master Volume",
 287                        TAS571X_MVOL_REG, 1, 0x1ff, 1,
 288                        tas5717_volume_tlv),
 289         SOC_DOUBLE_R_TLV("Speaker Volume",
 290                          TAS571X_CH1_VOL_REG, TAS571X_CH2_VOL_REG,
 291                          1, 0x1ff, 1, tas5717_volume_tlv),
 292         SOC_DOUBLE("Speaker Switch",
 293                    TAS571X_SOFT_MUTE_REG,
 294                    TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
 295                    1, 1),
 296 };
 297
 298 static const struct reg_default tas5717_reg_defaults[] = {
 299         { 0x04, 0x05 },
 300         { 0x05, 0x40 },
 301         { 0x06, 0x00 },
 302         { 0x07, 0x03ff },
 303         { 0x08, 0x00c0 },
 304         { 0x09, 0x00c0 },
 305         { 0x1b, 0x82 },
 306 };
 307
 308 static const struct regmap_config tas5717_regmap_config = {
 309         .reg_bits                       = 8,
 310         .val_bits                       = 32,
 311         .max_register                   = 0xff,
 312         .reg_read                       = tas571x_reg_read,
 313         .reg_write                      = tas571x_reg_write,
 314         .reg_defaults                   = tas5717_reg_defaults,
 315         .num_reg_defaults               = ARRAY_SIZE(tas5717_reg_defaults),
 316         .cache_type                     = REGCACHE_RBTREE,
 317 };
 318
 319 /* This entry is reused for tas5719 as the software interface is identical. */
 320 static const struct tas571x_chip tas5717_chip = {
 321         .supply_names                   = tas5717_supply_names,
 322         .num_supply_names               = ARRAY_SIZE(tas5717_supply_names),
 323         .controls                       = tas5717_controls,
 324         .num_controls                   = ARRAY_SIZE(tas5717_controls),
 325         .regmap_config                  = &tas5717_regmap_config,
 326         .vol_reg_size                   = 2,
 327 };
 328
 329 static const struct snd_soc_dapm_widget tas571x_dapm_widgets[] = {
 330         SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
 331         SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
 332
 333         SND_SOC_DAPM_OUTPUT("OUT_A"),
 334         SND_SOC_DAPM_OUTPUT("OUT_B"),
 335         SND_SOC_DAPM_OUTPUT("OUT_C"),
 336         SND_SOC_DAPM_OUTPUT("OUT_D"),
 337 };
 338
 339 static const struct snd_soc_dapm_route tas571x_dapm_routes[] = {
 340         { "DACL",  NULL, "Playback" },
 341         { "DACR",  NULL, "Playback" },
 342
 343         { "OUT_A", NULL, "DACL" },
 344         { "OUT_B", NULL, "DACL" },
 345         { "OUT_C", NULL, "DACR" },
 346         { "OUT_D", NULL, "DACR" },
 347 };
 348
 349 static const struct snd_soc_codec_driver tas571x_codec = {
 350         .set_bias_level = tas571x_set_bias_level,
 351         .idle_bias_off = true,
 352
 353         .dapm_widgets = tas571x_dapm_widgets,
 354         .num_dapm_widgets = ARRAY_SIZE(tas571x_dapm_widgets),
 355         .dapm_routes = tas571x_dapm_routes,
 356         .num_dapm_routes = ARRAY_SIZE(tas571x_dapm_routes),
 357 };
 358
 359 static struct snd_soc_dai_driver tas571x_dai = {
 360         .name = "tas571x-hifi",
 361         .playback = {
 362                 .stream_name = "Playback",
 363                 .channels_min = 2,
 364                 .channels_max = 2,
 365                 .rates = SNDRV_PCM_RATE_8000_48000,
 366                 .formats = SNDRV_PCM_FMTBIT_S32_LE |
 367                            SNDRV_PCM_FMTBIT_S24_LE |
 368                            SNDRV_PCM_FMTBIT_S16_LE,
 369         },
 370         .ops = &tas571x_dai_ops,
 371 };
 372
 373 static const struct of_device_id tas571x_of_match[];
 374
 375 static int tas571x_i2c_probe(struct i2c_client *client,
 376                              const struct i2c_device_id *id)
 377 {
 378         struct tas571x_private *priv;
 379         struct device *dev = &client->dev;
 380         const struct of_device_id *of_id;
 381         int i, ret;
 382
 383         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 384         if (!priv)
 385                 return -ENOMEM;
 386         i2c_set_clientdata(client, priv);
 387
 388         of_id = of_match_device(tas571x_of_match, dev);
 389         if (!of_id) {
 390                 dev_err(dev, "Unknown device type\n");
 391                 return -EINVAL;
 392         }
 393         priv->chip = of_id->data;
 394
 395         priv->mclk = devm_clk_get(dev, "mclk");
 396         if (IS_ERR(priv->mclk) && PTR_ERR(priv->mclk) != -ENOENT) {
 397                 dev_err(dev, "Failed to request mclk: %ld\n",
 398                         PTR_ERR(priv->mclk));
 399                 return PTR_ERR(priv->mclk);
 400         }
 401
 402         BUG_ON(priv->chip->num_supply_names > TAS571X_MAX_SUPPLIES);
 403         for (i = 0; i < priv->chip->num_supply_names; i++)
 404                 priv->supplies[i].supply = priv->chip->supply_names[i];
 405
 406         ret = devm_regulator_bulk_get(dev, priv->chip->num_supply_names,
 407                                       priv->supplies);
 408         if (ret) {
 409                 dev_err(dev, "Failed to get supplies: %d\n", ret);
 410                 return ret;
 411         }
 412         ret = regulator_bulk_enable(priv->chip->num_supply_names,
 413                                     priv->supplies);
 414         if (ret) {
 415                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
 416                 return ret;
 417         }
 418
 419         priv->regmap = devm_regmap_init(dev, NULL, client,
 420                                         priv->chip->regmap_config);
 421         if (IS_ERR(priv->regmap))
 422                 return PTR_ERR(priv->regmap);
 423
 424         priv->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW);
 425         if (IS_ERR(priv->pdn_gpio)) {
 426                 dev_err(dev, "error requesting pdn_gpio: %ld\n",
 427                         PTR_ERR(priv->pdn_gpio));
 428                 return PTR_ERR(priv->pdn_gpio);
 429         }
 430
 431         priv->reset_gpio = devm_gpiod_get_optional(dev, "reset",
 432                                                    GPIOD_OUT_HIGH);
 433         if (IS_ERR(priv->reset_gpio)) {
 434                 dev_err(dev, "error requesting reset_gpio: %ld\n",
 435                         PTR_ERR(priv->reset_gpio));
 436                 return PTR_ERR(priv->reset_gpio);
 437         } else if (priv->reset_gpio) {
 438                 /* pulse the active low reset line for ~100us */
 439                 usleep_range(100, 200);
 440                 gpiod_set_value(priv->reset_gpio, 0);
 441                 usleep_range(12000, 20000);
 442         }
 443
 444         ret = regmap_write(priv->regmap, TAS571X_OSC_TRIM_REG, 0);
 445         if (ret)
 446                 return ret;
 447
 448         ret = regmap_update_bits(priv->regmap, TAS571X_SYS_CTRL_2_REG,
 449                                  TAS571X_SYS_CTRL_2_SDN_MASK, 0);
 450         if (ret)
 451                 return ret;
 452
 453         memcpy(&priv->codec_driver, &tas571x_codec, sizeof(priv->codec_driver));
 454         priv->codec_driver.controls = priv->chip->controls;
 455         priv->codec_driver.num_controls = priv->chip->num_controls;
 456
 457         if (priv->chip->vol_reg_size == 2) {
 458                 /*
 459                  * The master volume defaults to 0x3ff (mute), but we ignore
 460                  * (zero) the LSB because the hardware step size is 0.125 dB
 461                  * and TLV_DB_SCALE_ITEM has a resolution of 0.01 dB.
 462                  */
 463                 ret = regmap_update_bits(priv->regmap, TAS571X_MVOL_REG, 1, 0);
 464                 if (ret)
 465                         return ret;
 466         }
 467
 468         regcache_cache_only(priv->regmap, true);
 469         gpiod_set_value(priv->pdn_gpio, 1);
 470
 471         return snd_soc_register_codec(&client->dev, &priv->codec_driver,
 472                                       &tas571x_dai, 1);
 473 }
 474
 475 static int tas571x_i2c_remove(struct i2c_client *client)
 476 {
 477         struct tas571x_private *priv = i2c_get_clientdata(client);
 478
 479         snd_soc_unregister_codec(&client->dev);
 480         regulator_bulk_disable(priv->chip->num_supply_names, priv->supplies);
 481
 482         return 0;
 483 }
 484
 485 static const struct of_device_id tas571x_of_match[] = {
 486         { .compatible = "ti,tas5711", .data = &tas5711_chip, },
 487         { .compatible = "ti,tas5717", .data = &tas5717_chip, },
 488         { .compatible = "ti,tas5719", .data = &tas5717_chip, },
 489         { }
 490 };
 491 MODULE_DEVICE_TABLE(of, tas571x_of_match);
 492
 493 static const struct i2c_device_id tas571x_i2c_id[] = {
 494         { "tas5711", 0 },
 495         { "tas5717", 0 },
 496         { "tas5719", 0 },
 497         { }
 498 };
 499 MODULE_DEVICE_TABLE(i2c, tas571x_i2c_id);
 500
 501 static struct i2c_driver tas571x_i2c_driver = {
 502         .driver = {
 503                 .name = "tas571x",
 504                 .of_match_table = of_match_ptr(tas571x_of_match),
 505         },
 506         .probe = tas571x_i2c_probe,
 507         .remove = tas571x_i2c_remove,
 508         .id_table = tas571x_i2c_id,
 509 };
 510 module_i2c_driver(tas571x_i2c_driver);
 511
 512 MODULE_DESCRIPTION("ASoC TAS571x driver");
 513 MODULE_AUTHOR("Kevin Cernekee <cernekee@chromium.org>");
 514 MODULE_LICENSE("GPL");