linux/sound/soc/codecs/wm8776.c
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   1/*
   2 * wm8776.c  --  WM8776 ALSA SoC Audio driver
   3 *
   4 * Copyright 2009-12 Wolfson Microelectronics plc
   5 *
   6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 *
  12 * TODO: Input ALC/limiter support
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/moduleparam.h>
  17#include <linux/init.h>
  18#include <linux/delay.h>
  19#include <linux/pm.h>
  20#include <linux/i2c.h>
  21#include <linux/of_device.h>
  22#include <linux/regmap.h>
  23#include <linux/spi/spi.h>
  24#include <linux/slab.h>
  25#include <sound/core.h>
  26#include <sound/pcm.h>
  27#include <sound/pcm_params.h>
  28#include <sound/soc.h>
  29#include <sound/initval.h>
  30#include <sound/tlv.h>
  31
  32#include "wm8776.h"
  33
  34enum wm8776_chip_type {
  35        WM8775 = 1,
  36        WM8776,
  37};
  38
  39/* codec private data */
  40struct wm8776_priv {
  41        struct regmap *regmap;
  42        int sysclk[2];
  43};
  44
  45static const struct reg_default wm8776_reg_defaults[] = {
  46        {  0, 0x79 },
  47        {  1, 0x79 },
  48        {  2, 0x79 },
  49        {  3, 0xff },
  50        {  4, 0xff },
  51        {  5, 0xff },
  52        {  6, 0x00 },
  53        {  7, 0x90 },
  54        {  8, 0x00 },
  55        {  9, 0x00 },
  56        { 10, 0x22 },
  57        { 11, 0x22 },
  58        { 12, 0x22 },
  59        { 13, 0x08 },
  60        { 14, 0xcf },
  61        { 15, 0xcf },
  62        { 16, 0x7b },
  63        { 17, 0x00 },
  64        { 18, 0x32 },
  65        { 19, 0x00 },
  66        { 20, 0xa6 },
  67        { 21, 0x01 },
  68        { 22, 0x01 },
  69};
  70
  71static bool wm8776_volatile(struct device *dev, unsigned int reg)
  72{
  73        switch (reg) {
  74        case WM8776_RESET:
  75                return true;
  76        default:
  77                return false;
  78        }
  79}
  80
  81static int wm8776_reset(struct snd_soc_codec *codec)
  82{
  83        return snd_soc_write(codec, WM8776_RESET, 0);
  84}
  85
  86static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  87static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  88static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  89
  90static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  91SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  92                 0, 127, 0, hp_tlv),
  93SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  94                 0, 255, 0, dac_tlv),
  95SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  96
  97SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  98
  99SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
 100                 0, 255, 0, adc_tlv),
 101SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
 102SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
 103SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
 104};
 105
 106static const struct snd_kcontrol_new inmix_controls[] = {
 107SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
 108SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
 109SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
 110SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
 111SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
 112};
 113
 114static const struct snd_kcontrol_new outmix_controls[] = {
 115SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
 116SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
 117SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
 118};
 119
 120static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
 121SND_SOC_DAPM_INPUT("AUX"),
 122
 123SND_SOC_DAPM_INPUT("AIN1"),
 124SND_SOC_DAPM_INPUT("AIN2"),
 125SND_SOC_DAPM_INPUT("AIN3"),
 126SND_SOC_DAPM_INPUT("AIN4"),
 127SND_SOC_DAPM_INPUT("AIN5"),
 128
 129SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
 130                   inmix_controls, ARRAY_SIZE(inmix_controls)),
 131
 132SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 133SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 134
 135SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 136                   outmix_controls, ARRAY_SIZE(outmix_controls)),
 137
 138SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 139
 140SND_SOC_DAPM_OUTPUT("VOUT"),
 141
 142SND_SOC_DAPM_OUTPUT("HPOUTL"),
 143SND_SOC_DAPM_OUTPUT("HPOUTR"),
 144};
 145
 146static const struct snd_soc_dapm_route routes[] = {
 147        { "Input Mixer", "AIN1 Switch", "AIN1" },
 148        { "Input Mixer", "AIN2 Switch", "AIN2" },
 149        { "Input Mixer", "AIN3 Switch", "AIN3" },
 150        { "Input Mixer", "AIN4 Switch", "AIN4" },
 151        { "Input Mixer", "AIN5 Switch", "AIN5" },
 152
 153        { "ADC", NULL, "Input Mixer" },
 154
 155        { "Output Mixer", "DAC Switch", "DAC" },
 156        { "Output Mixer", "AUX Switch", "AUX" },
 157        { "Output Mixer", "Bypass Switch", "Input Mixer" },
 158
 159        { "VOUT", NULL, "Output Mixer" },
 160
 161        { "Headphone PGA", NULL, "Output Mixer" },
 162
 163        { "HPOUTL", NULL, "Headphone PGA" },
 164        { "HPOUTR", NULL, "Headphone PGA" },
 165};
 166
 167static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 168{
 169        struct snd_soc_codec *codec = dai->codec;
 170        int reg, iface, master;
 171
 172        switch (dai->driver->id) {
 173        case WM8776_DAI_DAC:
 174                reg = WM8776_DACIFCTRL;
 175                master = 0x80;
 176                break;
 177        case WM8776_DAI_ADC:
 178                reg = WM8776_ADCIFCTRL;
 179                master = 0x100;
 180                break;
 181        default:
 182                return -EINVAL;
 183        }
 184
 185        iface = 0;
 186
 187        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 188        case SND_SOC_DAIFMT_CBM_CFM:
 189                break;
 190        case SND_SOC_DAIFMT_CBS_CFS:
 191                master = 0;
 192                break;
 193        default:
 194                return -EINVAL;
 195        }
 196
 197        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 198        case SND_SOC_DAIFMT_I2S:
 199                iface |= 0x0002;
 200                break;
 201        case SND_SOC_DAIFMT_RIGHT_J:
 202                break;
 203        case SND_SOC_DAIFMT_LEFT_J:
 204                iface |= 0x0001;
 205                break;
 206        default:
 207                return -EINVAL;
 208        }
 209
 210        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 211        case SND_SOC_DAIFMT_NB_NF:
 212                break;
 213        case SND_SOC_DAIFMT_IB_IF:
 214                iface |= 0x00c;
 215                break;
 216        case SND_SOC_DAIFMT_IB_NF:
 217                iface |= 0x008;
 218                break;
 219        case SND_SOC_DAIFMT_NB_IF:
 220                iface |= 0x004;
 221                break;
 222        default:
 223                return -EINVAL;
 224        }
 225
 226        /* Finally, write out the values */
 227        snd_soc_update_bits(codec, reg, 0xf, iface);
 228        snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 229
 230        return 0;
 231}
 232
 233static int mclk_ratios[] = {
 234        128,
 235        192,
 236        256,
 237        384,
 238        512,
 239        768,
 240};
 241
 242static int wm8776_hw_params(struct snd_pcm_substream *substream,
 243                            struct snd_pcm_hw_params *params,
 244                            struct snd_soc_dai *dai)
 245{
 246        struct snd_soc_codec *codec = dai->codec;
 247        struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 248        int iface_reg, iface;
 249        int ratio_shift, master;
 250        int i;
 251
 252        switch (dai->driver->id) {
 253        case WM8776_DAI_DAC:
 254                iface_reg = WM8776_DACIFCTRL;
 255                master = 0x80;
 256                ratio_shift = 4;
 257                break;
 258        case WM8776_DAI_ADC:
 259                iface_reg = WM8776_ADCIFCTRL;
 260                master = 0x100;
 261                ratio_shift = 0;
 262                break;
 263        default:
 264                return -EINVAL;
 265        }
 266
 267        /* Set word length */
 268        switch (params_width(params)) {
 269        case 16:
 270                iface = 0;
 271                break;
 272        case 20:
 273                iface = 0x10;
 274                break;
 275        case 24:
 276                iface = 0x20;
 277                break;
 278        case 32:
 279                iface = 0x30;
 280                break;
 281        default:
 282                dev_err(codec->dev, "Unsupported sample size: %i\n",
 283                        params_width(params));
 284                return -EINVAL;
 285        }
 286
 287        /* Only need to set MCLK/LRCLK ratio if we're master */
 288        if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 289                for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 290                        if (wm8776->sysclk[dai->driver->id] / params_rate(params)
 291                            == mclk_ratios[i])
 292                                break;
 293                }
 294
 295                if (i == ARRAY_SIZE(mclk_ratios)) {
 296                        dev_err(codec->dev,
 297                                "Unable to configure MCLK ratio %d/%d\n",
 298                                wm8776->sysclk[dai->driver->id], params_rate(params));
 299                        return -EINVAL;
 300                }
 301
 302                dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 303
 304                snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 305                                    0x7 << ratio_shift, i << ratio_shift);
 306        } else {
 307                dev_dbg(codec->dev, "DAI in slave mode\n");
 308        }
 309
 310        snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 311
 312        return 0;
 313}
 314
 315static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 316{
 317        struct snd_soc_codec *codec = dai->codec;
 318
 319        return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 320}
 321
 322static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 323                             int clk_id, unsigned int freq, int dir)
 324{
 325        struct snd_soc_codec *codec = dai->codec;
 326        struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 327
 328        if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
 329                return -EINVAL;
 330
 331        wm8776->sysclk[dai->driver->id] = freq;
 332
 333        return 0;
 334}
 335
 336static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 337                                 enum snd_soc_bias_level level)
 338{
 339        struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 340
 341        switch (level) {
 342        case SND_SOC_BIAS_ON:
 343                break;
 344        case SND_SOC_BIAS_PREPARE:
 345                break;
 346        case SND_SOC_BIAS_STANDBY:
 347                if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 348                        regcache_sync(wm8776->regmap);
 349
 350                        /* Disable the global powerdown; DAPM does the rest */
 351                        snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 352                }
 353
 354                break;
 355        case SND_SOC_BIAS_OFF:
 356                snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 357                break;
 358        }
 359
 360        return 0;
 361}
 362
 363#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 364                        SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 365
 366static const struct snd_soc_dai_ops wm8776_dac_ops = {
 367        .digital_mute   = wm8776_mute,
 368        .hw_params      = wm8776_hw_params,
 369        .set_fmt        = wm8776_set_fmt,
 370        .set_sysclk     = wm8776_set_sysclk,
 371};
 372
 373static const struct snd_soc_dai_ops wm8776_adc_ops = {
 374        .hw_params      = wm8776_hw_params,
 375        .set_fmt        = wm8776_set_fmt,
 376        .set_sysclk     = wm8776_set_sysclk,
 377};
 378
 379static struct snd_soc_dai_driver wm8776_dai[] = {
 380        {
 381                .name = "wm8776-hifi-playback",
 382                .id     = WM8776_DAI_DAC,
 383                .playback = {
 384                        .stream_name = "Playback",
 385                        .channels_min = 2,
 386                        .channels_max = 2,
 387                        .rates = SNDRV_PCM_RATE_CONTINUOUS,
 388                        .rate_min = 32000,
 389                        .rate_max = 192000,
 390                        .formats = WM8776_FORMATS,
 391                },
 392                .ops = &wm8776_dac_ops,
 393        },
 394        {
 395                .name = "wm8776-hifi-capture",
 396                .id     = WM8776_DAI_ADC,
 397                .capture = {
 398                        .stream_name = "Capture",
 399                        .channels_min = 2,
 400                        .channels_max = 2,
 401                        .rates = SNDRV_PCM_RATE_CONTINUOUS,
 402                        .rate_min = 32000,
 403                        .rate_max = 96000,
 404                        .formats = WM8776_FORMATS,
 405                },
 406                .ops = &wm8776_adc_ops,
 407        },
 408};
 409
 410static int wm8776_probe(struct snd_soc_codec *codec)
 411{
 412        int ret = 0;
 413
 414        ret = wm8776_reset(codec);
 415        if (ret < 0) {
 416                dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 417                return ret;
 418        }
 419
 420        /* Latch the update bits; right channel only since we always
 421         * update both. */
 422        snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 423        snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 424
 425        return ret;
 426}
 427
 428static const struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
 429        .probe =        wm8776_probe,
 430        .set_bias_level = wm8776_set_bias_level,
 431        .suspend_bias_off = true,
 432
 433        .component_driver = {
 434                .controls               = wm8776_snd_controls,
 435                .num_controls           = ARRAY_SIZE(wm8776_snd_controls),
 436                .dapm_widgets           = wm8776_dapm_widgets,
 437                .num_dapm_widgets       = ARRAY_SIZE(wm8776_dapm_widgets),
 438                .dapm_routes            = routes,
 439                .num_dapm_routes        = ARRAY_SIZE(routes),
 440        },
 441};
 442
 443static const struct of_device_id wm8776_of_match[] = {
 444        { .compatible = "wlf,wm8776", },
 445        { }
 446};
 447MODULE_DEVICE_TABLE(of, wm8776_of_match);
 448
 449static const struct regmap_config wm8776_regmap = {
 450        .reg_bits = 7,
 451        .val_bits = 9,
 452        .max_register = WM8776_RESET,
 453
 454        .reg_defaults = wm8776_reg_defaults,
 455        .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
 456        .cache_type = REGCACHE_RBTREE,
 457
 458        .volatile_reg = wm8776_volatile,
 459};
 460
 461#if defined(CONFIG_SPI_MASTER)
 462static int wm8776_spi_probe(struct spi_device *spi)
 463{
 464        struct wm8776_priv *wm8776;
 465        int ret;
 466
 467        wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
 468                              GFP_KERNEL);
 469        if (wm8776 == NULL)
 470                return -ENOMEM;
 471
 472        wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
 473        if (IS_ERR(wm8776->regmap))
 474                return PTR_ERR(wm8776->regmap);
 475
 476        spi_set_drvdata(spi, wm8776);
 477
 478        ret = snd_soc_register_codec(&spi->dev,
 479                        &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 480
 481        return ret;
 482}
 483
 484static int wm8776_spi_remove(struct spi_device *spi)
 485{
 486        snd_soc_unregister_codec(&spi->dev);
 487        return 0;
 488}
 489
 490static struct spi_driver wm8776_spi_driver = {
 491        .driver = {
 492                .name   = "wm8776",
 493                .of_match_table = wm8776_of_match,
 494        },
 495        .probe          = wm8776_spi_probe,
 496        .remove         = wm8776_spi_remove,
 497};
 498#endif /* CONFIG_SPI_MASTER */
 499
 500#if IS_ENABLED(CONFIG_I2C)
 501static int wm8776_i2c_probe(struct i2c_client *i2c,
 502                            const struct i2c_device_id *id)
 503{
 504        struct wm8776_priv *wm8776;
 505        int ret;
 506
 507        wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
 508                              GFP_KERNEL);
 509        if (wm8776 == NULL)
 510                return -ENOMEM;
 511
 512        wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
 513        if (IS_ERR(wm8776->regmap))
 514                return PTR_ERR(wm8776->regmap);
 515
 516        i2c_set_clientdata(i2c, wm8776);
 517
 518        ret =  snd_soc_register_codec(&i2c->dev,
 519                        &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 520
 521        return ret;
 522}
 523
 524static int wm8776_i2c_remove(struct i2c_client *client)
 525{
 526        snd_soc_unregister_codec(&client->dev);
 527        return 0;
 528}
 529
 530static const struct i2c_device_id wm8776_i2c_id[] = {
 531        { "wm8775", WM8775 },
 532        { "wm8776", WM8776 },
 533        { }
 534};
 535MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 536
 537static struct i2c_driver wm8776_i2c_driver = {
 538        .driver = {
 539                .name = "wm8776",
 540                .of_match_table = wm8776_of_match,
 541        },
 542        .probe =    wm8776_i2c_probe,
 543        .remove =   wm8776_i2c_remove,
 544        .id_table = wm8776_i2c_id,
 545};
 546#endif
 547
 548static int __init wm8776_modinit(void)
 549{
 550        int ret = 0;
 551#if IS_ENABLED(CONFIG_I2C)
 552        ret = i2c_add_driver(&wm8776_i2c_driver);
 553        if (ret != 0) {
 554                printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
 555                       ret);
 556        }
 557#endif
 558#if defined(CONFIG_SPI_MASTER)
 559        ret = spi_register_driver(&wm8776_spi_driver);
 560        if (ret != 0) {
 561                printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
 562                       ret);
 563        }
 564#endif
 565        return ret;
 566}
 567module_init(wm8776_modinit);
 568
 569static void __exit wm8776_exit(void)
 570{
 571#if IS_ENABLED(CONFIG_I2C)
 572        i2c_del_driver(&wm8776_i2c_driver);
 573#endif
 574#if defined(CONFIG_SPI_MASTER)
 575        spi_unregister_driver(&wm8776_spi_driver);
 576#endif
 577}
 578module_exit(wm8776_exit);
 579
 580MODULE_DESCRIPTION("ASoC WM8776 driver");
 581MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 582MODULE_LICENSE("GPL");
 583