sound/soc/codecs/wm8776.c

   1 /*
   2  * wm8776.c  --  WM8776 ALSA SoC Audio driver
   3  *
   4  * Copyright 2009 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/platform_device.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
  34 /* codec private data */
  35 struct wm8776_priv {
  36         enum snd_soc_control_type control_type;
  37         int sysclk[2];
  38 };
  39
  40 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
  41         0x79, 0x79, 0x79, 0xff, 0xff,  /* 4 */
  42         0xff, 0x00, 0x90, 0x00, 0x00,  /* 9 */
  43         0x22, 0x22, 0x22, 0x08, 0xcf,  /* 14 */
  44         0xcf, 0x7b, 0x00, 0x32, 0x00,  /* 19 */
  45         0xa6, 0x01, 0x01
  46 };
  47
  48 static int wm8776_reset(struct snd_soc_codec *codec)
  49 {
  50         return snd_soc_write(codec, WM8776_RESET, 0);
  51 }
  52
  53 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  54 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  55 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  56
  57 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  58 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  59                  0, 127, 0, hp_tlv),
  60 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  61                  0, 255, 0, dac_tlv),
  62 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  63
  64 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  65
  66 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  67                  0, 255, 0, adc_tlv),
  68 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  69 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
  70 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
  71 };
  72
  73 static const struct snd_kcontrol_new inmix_controls[] = {
  74 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
  75 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
  76 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
  77 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
  78 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
  79 };
  80
  81 static const struct snd_kcontrol_new outmix_controls[] = {
  82 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
  83 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
  84 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
  85 };
  86
  87 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
  88 SND_SOC_DAPM_INPUT("AUX"),
  89
  90 SND_SOC_DAPM_INPUT("AIN1"),
  91 SND_SOC_DAPM_INPUT("AIN2"),
  92 SND_SOC_DAPM_INPUT("AIN3"),
  93 SND_SOC_DAPM_INPUT("AIN4"),
  94 SND_SOC_DAPM_INPUT("AIN5"),
  95
  96 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
  97                    inmix_controls, ARRAY_SIZE(inmix_controls)),
  98
  99 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 100 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 101
 102 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 103                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 104
 105 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 106
 107 SND_SOC_DAPM_OUTPUT("VOUT"),
 108
 109 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 110 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 111 };
 112
 113 static const struct snd_soc_dapm_route routes[] = {
 114         { "Input Mixer", "AIN1 Switch", "AIN1" },
 115         { "Input Mixer", "AIN2 Switch", "AIN2" },
 116         { "Input Mixer", "AIN3 Switch", "AIN3" },
 117         { "Input Mixer", "AIN4 Switch", "AIN4" },
 118         { "Input Mixer", "AIN5 Switch", "AIN5" },
 119
 120         { "ADC", NULL, "Input Mixer" },
 121
 122         { "Output Mixer", "DAC Switch", "DAC" },
 123         { "Output Mixer", "AUX Switch", "AUX" },
 124         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 125
 126         { "VOUT", NULL, "Output Mixer" },
 127
 128         { "Headphone PGA", NULL, "Output Mixer" },
 129
 130         { "HPOUTL", NULL, "Headphone PGA" },
 131         { "HPOUTR", NULL, "Headphone PGA" },
 132 };
 133
 134 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 135 {
 136         struct snd_soc_codec *codec = dai->codec;
 137         int reg, iface, master;
 138
 139         switch (dai->driver->id) {
 140         case WM8776_DAI_DAC:
 141                 reg = WM8776_DACIFCTRL;
 142                 master = 0x80;
 143                 break;
 144         case WM8776_DAI_ADC:
 145                 reg = WM8776_ADCIFCTRL;
 146                 master = 0x100;
 147                 break;
 148         default:
 149                 return -EINVAL;
 150         }
 151
 152         iface = 0;
 153
 154         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 155         case SND_SOC_DAIFMT_CBM_CFM:
 156                 break;
 157         case SND_SOC_DAIFMT_CBS_CFS:
 158                 master = 0;
 159                 break;
 160         default:
 161                 return -EINVAL;
 162         }
 163
 164         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 165         case SND_SOC_DAIFMT_I2S:
 166                 iface |= 0x0002;
 167                 break;
 168         case SND_SOC_DAIFMT_RIGHT_J:
 169                 break;
 170         case SND_SOC_DAIFMT_LEFT_J:
 171                 iface |= 0x0001;
 172                 break;
 173         default:
 174                 return -EINVAL;
 175         }
 176
 177         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 178         case SND_SOC_DAIFMT_NB_NF:
 179                 break;
 180         case SND_SOC_DAIFMT_IB_IF:
 181                 iface |= 0x00c;
 182                 break;
 183         case SND_SOC_DAIFMT_IB_NF:
 184                 iface |= 0x008;
 185                 break;
 186         case SND_SOC_DAIFMT_NB_IF:
 187                 iface |= 0x004;
 188                 break;
 189         default:
 190                 return -EINVAL;
 191         }
 192
 193         /* Finally, write out the values */
 194         snd_soc_update_bits(codec, reg, 0xf, iface);
 195         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 196
 197         return 0;
 198 }
 199
 200 static int mclk_ratios[] = {
 201         128,
 202         192,
 203         256,
 204         384,
 205         512,
 206         768,
 207 };
 208
 209 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 210                             struct snd_pcm_hw_params *params,
 211                             struct snd_soc_dai *dai)
 212 {
 213         struct snd_soc_codec *codec = dai->codec;
 214         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 215         int iface_reg, iface;
 216         int ratio_shift, master;
 217         int i;
 218
 219         switch (dai->driver->id) {
 220         case WM8776_DAI_DAC:
 221                 iface_reg = WM8776_DACIFCTRL;
 222                 master = 0x80;
 223                 ratio_shift = 4;
 224                 break;
 225         case WM8776_DAI_ADC:
 226                 iface_reg = WM8776_ADCIFCTRL;
 227                 master = 0x100;
 228                 ratio_shift = 0;
 229                 break;
 230         default:
 231                 return -EINVAL;
 232         }
 233
 234         /* Set word length */
 235         switch (snd_pcm_format_width(params_format(params))) {
 236         case 16:
 237                 iface = 0;
 238         case 20:
 239                 iface = 0x10;
 240                 break;
 241         case 24:
 242                 iface = 0x20;
 243                 break;
 244         case 32:
 245                 iface = 0x30;
 246                 break;
 247         default:
 248                 dev_err(codec->dev, "Unsupported sample size: %i\n",
 249                         snd_pcm_format_width(params_format(params)));
 250                 return -EINVAL;
 251         }
 252
 253         /* Only need to set MCLK/LRCLK ratio if we're master */
 254         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 255                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 256                         if (wm8776->sysclk[dai->driver->id] / params_rate(params)
 257                             == mclk_ratios[i])
 258                                 break;
 259                 }
 260
 261                 if (i == ARRAY_SIZE(mclk_ratios)) {
 262                         dev_err(codec->dev,
 263                                 "Unable to configure MCLK ratio %d/%d\n",
 264                                 wm8776->sysclk[dai->driver->id], params_rate(params));
 265                         return -EINVAL;
 266                 }
 267
 268                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 269
 270                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 271                                     0x7 << ratio_shift, i << ratio_shift);
 272         } else {
 273                 dev_dbg(codec->dev, "DAI in slave mode\n");
 274         }
 275
 276         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 277
 278         return 0;
 279 }
 280
 281 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 282 {
 283         struct snd_soc_codec *codec = dai->codec;
 284
 285         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 286 }
 287
 288 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 289                              int clk_id, unsigned int freq, int dir)
 290 {
 291         struct snd_soc_codec *codec = dai->codec;
 292         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 293
 294         BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
 295
 296         wm8776->sysclk[dai->driver->id] = freq;
 297
 298         return 0;
 299 }
 300
 301 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 302                                  enum snd_soc_bias_level level)
 303 {
 304         switch (level) {
 305         case SND_SOC_BIAS_ON:
 306                 break;
 307         case SND_SOC_BIAS_PREPARE:
 308                 break;
 309         case SND_SOC_BIAS_STANDBY:
 310                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 311                         /* Disable the global powerdown; DAPM does the rest */
 312                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 313                 }
 314
 315                 break;
 316         case SND_SOC_BIAS_OFF:
 317                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 318                 break;
 319         }
 320
 321         codec->dapm.bias_level = level;
 322         return 0;
 323 }
 324
 325 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 326                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 327                       SNDRV_PCM_RATE_96000)
 328
 329
 330 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 331                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 332
 333 static struct snd_soc_dai_ops wm8776_dac_ops = {
 334         .digital_mute   = wm8776_mute,
 335         .hw_params      = wm8776_hw_params,
 336         .set_fmt        = wm8776_set_fmt,
 337         .set_sysclk     = wm8776_set_sysclk,
 338 };
 339
 340 static struct snd_soc_dai_ops wm8776_adc_ops = {
 341         .hw_params      = wm8776_hw_params,
 342         .set_fmt        = wm8776_set_fmt,
 343         .set_sysclk     = wm8776_set_sysclk,
 344 };
 345
 346 static struct snd_soc_dai_driver wm8776_dai[] = {
 347         {
 348                 .name = "wm8776-hifi-playback",
 349                 .id     = WM8776_DAI_DAC,
 350                 .playback = {
 351                         .stream_name = "Playback",
 352                         .channels_min = 2,
 353                         .channels_max = 2,
 354                         .rates = WM8776_RATES,
 355                         .formats = WM8776_FORMATS,
 356                 },
 357                 .ops = &wm8776_dac_ops,
 358         },
 359         {
 360                 .name = "wm8776-hifi-capture",
 361                 .id     = WM8776_DAI_ADC,
 362                 .capture = {
 363                         .stream_name = "Capture",
 364                         .channels_min = 2,
 365                         .channels_max = 2,
 366                         .rates = WM8776_RATES,
 367                         .formats = WM8776_FORMATS,
 368                 },
 369                 .ops = &wm8776_adc_ops,
 370         },
 371 };
 372
 373 #ifdef CONFIG_PM
 374 static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
 375 {
 376         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 377
 378         return 0;
 379 }
 380
 381 static int wm8776_resume(struct snd_soc_codec *codec)
 382 {
 383         int i;
 384         u8 data[2];
 385         u16 *cache = codec->reg_cache;
 386
 387         /* Sync reg_cache with the hardware */
 388         for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
 389                 if (cache[i] == wm8776_reg[i])
 390                         continue;
 391                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 392                 data[1] = cache[i] & 0x00ff;
 393                 codec->hw_write(codec->control_data, data, 2);
 394         }
 395
 396         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 397
 398         return 0;
 399 }
 400 #else
 401 #define wm8776_suspend NULL
 402 #define wm8776_resume NULL
 403 #endif
 404
 405 static int wm8776_probe(struct snd_soc_codec *codec)
 406 {
 407         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 408         struct snd_soc_dapm_context *dapm = &codec->dapm;
 409         int ret = 0;
 410
 411         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
 412         if (ret < 0) {
 413                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 414                 return ret;
 415         }
 416
 417         ret = wm8776_reset(codec);
 418         if (ret < 0) {
 419                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 420                 return ret;
 421         }
 422
 423         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 424
 425         /* Latch the update bits; right channel only since we always
 426          * update both. */
 427         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 428         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 429
 430         snd_soc_add_controls(codec, wm8776_snd_controls,
 431                              ARRAY_SIZE(wm8776_snd_controls));
 432         snd_soc_dapm_new_controls(dapm, wm8776_dapm_widgets,
 433                                   ARRAY_SIZE(wm8776_dapm_widgets));
 434         snd_soc_dapm_add_routes(dapm, routes, ARRAY_SIZE(routes));
 435
 436         return ret;
 437 }
 438
 439 /* power down chip */
 440 static int wm8776_remove(struct snd_soc_codec *codec)
 441 {
 442         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 443         return 0;
 444 }
 445
 446 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
 447         .probe =        wm8776_probe,
 448         .remove =       wm8776_remove,
 449         .suspend =      wm8776_suspend,
 450         .resume =       wm8776_resume,
 451         .set_bias_level = wm8776_set_bias_level,
 452         .reg_cache_size = ARRAY_SIZE(wm8776_reg),
 453         .reg_word_size = sizeof(u16),
 454         .reg_cache_default = wm8776_reg,
 455 };
 456
 457 static const struct of_device_id wm8776_of_match[] = {
 458         { .compatible = "wlf,wm8776", },
 459         { }
 460 };
 461 MODULE_DEVICE_TABLE(of, wm8776_of_match);
 462
 463 #if defined(CONFIG_SPI_MASTER)
 464 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 465 {
 466         struct wm8776_priv *wm8776;
 467         int ret;
 468
 469         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 470         if (wm8776 == NULL)
 471                 return -ENOMEM;
 472
 473         wm8776->control_type = SND_SOC_SPI;
 474         spi_set_drvdata(spi, wm8776);
 475
 476         ret = snd_soc_register_codec(&spi->dev,
 477                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 478         if (ret < 0)
 479                 kfree(wm8776);
 480         return ret;
 481 }
 482
 483 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 484 {
 485         snd_soc_unregister_codec(&spi->dev);
 486         kfree(spi_get_drvdata(spi));
 487         return 0;
 488 }
 489
 490 static struct spi_driver wm8776_spi_driver = {
 491         .driver = {
 492                 .name   = "wm8776",
 493                 .owner  = THIS_MODULE,
 494                 .of_match_table = wm8776_of_match,
 495         },
 496         .probe          = wm8776_spi_probe,
 497         .remove         = __devexit_p(wm8776_spi_remove),
 498 };
 499 #endif /* CONFIG_SPI_MASTER */
 500
 501 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 502 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 503                                       const struct i2c_device_id *id)
 504 {
 505         struct wm8776_priv *wm8776;
 506         int ret;
 507
 508         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 509         if (wm8776 == NULL)
 510                 return -ENOMEM;
 511
 512         i2c_set_clientdata(i2c, wm8776);
 513         wm8776->control_type = SND_SOC_I2C;
 514
 515         ret =  snd_soc_register_codec(&i2c->dev,
 516                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 517         if (ret < 0)
 518                 kfree(wm8776);
 519         return ret;
 520 }
 521
 522 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 523 {
 524         snd_soc_unregister_codec(&client->dev);
 525         kfree(i2c_get_clientdata(client));
 526         return 0;
 527 }
 528
 529 static const struct i2c_device_id wm8776_i2c_id[] = {
 530         { "wm8776", 0 },
 531         { }
 532 };
 533 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 534
 535 static struct i2c_driver wm8776_i2c_driver = {
 536         .driver = {
 537                 .name = "wm8776",
 538                 .owner = THIS_MODULE,
 539                 .of_match_table = wm8776_of_match,
 540         },
 541         .probe =    wm8776_i2c_probe,
 542         .remove =   __devexit_p(wm8776_i2c_remove),
 543         .id_table = wm8776_i2c_id,
 544 };
 545 #endif
 546
 547 static int __init wm8776_modinit(void)
 548 {
 549         int ret = 0;
 550 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 551         ret = i2c_add_driver(&wm8776_i2c_driver);
 552         if (ret != 0) {
 553                 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
 554                        ret);
 555         }
 556 #endif
 557 #if defined(CONFIG_SPI_MASTER)
 558         ret = spi_register_driver(&wm8776_spi_driver);
 559         if (ret != 0) {
 560                 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
 561                        ret);
 562         }
 563 #endif
 564         return ret;
 565 }
 566 module_init(wm8776_modinit);
 567
 568 static void __exit wm8776_exit(void)
 569 {
 570 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 571         i2c_del_driver(&wm8776_i2c_driver);
 572 #endif
 573 #if defined(CONFIG_SPI_MASTER)
 574         spi_unregister_driver(&wm8776_spi_driver);
 575 #endif
 576 }
 577 module_exit(wm8776_exit);
 578
 579 MODULE_DESCRIPTION("ASoC WM8776 driver");
 580 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 581 MODULE_LICENSE("GPL");