sound/soc/codecs/wm8711.c

   1 /*
   2  * wm8711.c  --  WM8711 ALSA SoC Audio driver
   3  *
   4  * Copyright 2006 Wolfson Microelectronics
   5  *
   6  * Author: Mike Arthur <linux@wolfsonmicro.com>
   7  *
   8  * Based on wm8731.c by Richard Purdie
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  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/platform_device.h>
  22 #include <linux/spi/spi.h>
  23 #include <linux/slab.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/soc.h>
  28 #include <sound/tlv.h>
  29 #include <sound/initval.h>
  30
  31 #include "wm8711.h"
  32
  33 /* codec private data */
  34 struct wm8711_priv {
  35         enum snd_soc_control_type bus_type;
  36         u16 reg_cache[WM8711_CACHEREGNUM];
  37         unsigned int sysclk;
  38 };
  39
  40 /*
  41  * wm8711 register cache
  42  * We can't read the WM8711 register space when we are
  43  * using 2 wire for device control, so we cache them instead.
  44  * There is no point in caching the reset register
  45  */
  46 static const u16 wm8711_reg[WM8711_CACHEREGNUM] = {
  47         0x0079, 0x0079, 0x000a, 0x0008,
  48         0x009f, 0x000a, 0x0000, 0x0000
  49 };
  50
  51 #define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0)
  52
  53 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
  54
  55 static const struct snd_kcontrol_new wm8711_snd_controls[] = {
  56
  57 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
  58                  0, 127, 0, out_tlv),
  59 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
  60         7, 1, 0),
  61
  62 };
  63
  64 /* Output Mixer */
  65 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
  66 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
  67 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
  68 };
  69
  70 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
  71 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
  72         &wm8711_output_mixer_controls[0],
  73         ARRAY_SIZE(wm8711_output_mixer_controls)),
  74 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
  75 SND_SOC_DAPM_OUTPUT("LOUT"),
  76 SND_SOC_DAPM_OUTPUT("LHPOUT"),
  77 SND_SOC_DAPM_OUTPUT("ROUT"),
  78 SND_SOC_DAPM_OUTPUT("RHPOUT"),
  79 };
  80
  81 static const struct snd_soc_dapm_route intercon[] = {
  82         /* output mixer */
  83         {"Output Mixer", "Line Bypass Switch", "Line Input"},
  84         {"Output Mixer", "HiFi Playback Switch", "DAC"},
  85
  86         /* outputs */
  87         {"RHPOUT", NULL, "Output Mixer"},
  88         {"ROUT", NULL, "Output Mixer"},
  89         {"LHPOUT", NULL, "Output Mixer"},
  90         {"LOUT", NULL, "Output Mixer"},
  91 };
  92
  93 static int wm8711_add_widgets(struct snd_soc_codec *codec)
  94 {
  95         struct snd_soc_dapm_context *dapm = &codec->dapm;
  96
  97         snd_soc_dapm_new_controls(dapm, wm8711_dapm_widgets,
  98                                   ARRAY_SIZE(wm8711_dapm_widgets));
  99         snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
 100
 101         return 0;
 102 }
 103
 104 struct _coeff_div {
 105         u32 mclk;
 106         u32 rate;
 107         u16 fs;
 108         u8 sr:4;
 109         u8 bosr:1;
 110         u8 usb:1;
 111 };
 112
 113 /* codec mclk clock divider coefficients */
 114 static const struct _coeff_div coeff_div[] = {
 115         /* 48k */
 116         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 117         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 118         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 119
 120         /* 32k */
 121         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 122         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 123         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 124
 125         /* 8k */
 126         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 127         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 128         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 129         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 130         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 131
 132         /* 96k */
 133         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 134         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 135         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 136
 137         /* 44.1k */
 138         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 139         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 140         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 141
 142         /* 88.2k */
 143         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 144         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 145         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 146 };
 147
 148 static inline int get_coeff(int mclk, int rate)
 149 {
 150         int i;
 151
 152         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 153                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 154                         return i;
 155         }
 156         return 0;
 157 }
 158
 159 static int wm8711_hw_params(struct snd_pcm_substream *substream,
 160         struct snd_pcm_hw_params *params,
 161         struct snd_soc_dai *dai)
 162 {
 163         struct snd_soc_codec *codec = dai->codec;
 164         struct wm8711_priv *wm8711 =  snd_soc_codec_get_drvdata(codec);
 165         u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfffc;
 166         int i = get_coeff(wm8711->sysclk, params_rate(params));
 167         u16 srate = (coeff_div[i].sr << 2) |
 168                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 169
 170         snd_soc_write(codec, WM8711_SRATE, srate);
 171
 172         /* bit size */
 173         switch (params_format(params)) {
 174         case SNDRV_PCM_FORMAT_S16_LE:
 175                 break;
 176         case SNDRV_PCM_FORMAT_S20_3LE:
 177                 iface |= 0x0004;
 178                 break;
 179         case SNDRV_PCM_FORMAT_S24_LE:
 180                 iface |= 0x0008;
 181                 break;
 182         }
 183
 184         snd_soc_write(codec, WM8711_IFACE, iface);
 185         return 0;
 186 }
 187
 188 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
 189                               struct snd_soc_dai *dai)
 190 {
 191         struct snd_soc_codec *codec = dai->codec;
 192
 193         /* set active */
 194         snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
 195
 196         return 0;
 197 }
 198
 199 static void wm8711_shutdown(struct snd_pcm_substream *substream,
 200                             struct snd_soc_dai *dai)
 201 {
 202         struct snd_soc_codec *codec = dai->codec;
 203
 204         /* deactivate */
 205         if (!codec->active) {
 206                 udelay(50);
 207                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 208         }
 209 }
 210
 211 static int wm8711_mute(struct snd_soc_dai *dai, int mute)
 212 {
 213         struct snd_soc_codec *codec = dai->codec;
 214         u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
 215
 216         if (mute)
 217                 snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8);
 218         else
 219                 snd_soc_write(codec, WM8711_APDIGI, mute_reg);
 220
 221         return 0;
 222 }
 223
 224 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 225                 int clk_id, unsigned int freq, int dir)
 226 {
 227         struct snd_soc_codec *codec = codec_dai->codec;
 228         struct wm8711_priv *wm8711 =  snd_soc_codec_get_drvdata(codec);
 229
 230         switch (freq) {
 231         case 11289600:
 232         case 12000000:
 233         case 12288000:
 234         case 16934400:
 235         case 18432000:
 236                 wm8711->sysclk = freq;
 237                 return 0;
 238         }
 239         return -EINVAL;
 240 }
 241
 242 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
 243                 unsigned int fmt)
 244 {
 245         struct snd_soc_codec *codec = codec_dai->codec;
 246         u16 iface = 0;
 247
 248         /* set master/slave audio interface */
 249         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 250         case SND_SOC_DAIFMT_CBM_CFM:
 251                 iface |= 0x0040;
 252                 break;
 253         case SND_SOC_DAIFMT_CBS_CFS:
 254                 break;
 255         default:
 256                 return -EINVAL;
 257         }
 258
 259         /* interface format */
 260         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 261         case SND_SOC_DAIFMT_I2S:
 262                 iface |= 0x0002;
 263                 break;
 264         case SND_SOC_DAIFMT_RIGHT_J:
 265                 break;
 266         case SND_SOC_DAIFMT_LEFT_J:
 267                 iface |= 0x0001;
 268                 break;
 269         case SND_SOC_DAIFMT_DSP_A:
 270                 iface |= 0x0003;
 271                 break;
 272         case SND_SOC_DAIFMT_DSP_B:
 273                 iface |= 0x0013;
 274                 break;
 275         default:
 276                 return -EINVAL;
 277         }
 278
 279         /* clock inversion */
 280         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 281         case SND_SOC_DAIFMT_NB_NF:
 282                 break;
 283         case SND_SOC_DAIFMT_IB_IF:
 284                 iface |= 0x0090;
 285                 break;
 286         case SND_SOC_DAIFMT_IB_NF:
 287                 iface |= 0x0080;
 288                 break;
 289         case SND_SOC_DAIFMT_NB_IF:
 290                 iface |= 0x0010;
 291                 break;
 292         default:
 293                 return -EINVAL;
 294         }
 295
 296         /* set iface */
 297         snd_soc_write(codec, WM8711_IFACE, iface);
 298         return 0;
 299 }
 300
 301
 302 static int wm8711_set_bias_level(struct snd_soc_codec *codec,
 303         enum snd_soc_bias_level level)
 304 {
 305         u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
 306
 307         switch (level) {
 308         case SND_SOC_BIAS_ON:
 309                 snd_soc_write(codec, WM8711_PWR, reg);
 310                 break;
 311         case SND_SOC_BIAS_PREPARE:
 312                 break;
 313         case SND_SOC_BIAS_STANDBY:
 314                 snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
 315                 break;
 316         case SND_SOC_BIAS_OFF:
 317                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 318                 snd_soc_write(codec, WM8711_PWR, 0xffff);
 319                 break;
 320         }
 321         codec->dapm.bias_level = level;
 322         return 0;
 323 }
 324
 325 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000
 326
 327 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 328         SNDRV_PCM_FMTBIT_S24_LE)
 329
 330 static struct snd_soc_dai_ops wm8711_ops = {
 331         .prepare = wm8711_pcm_prepare,
 332         .hw_params = wm8711_hw_params,
 333         .shutdown = wm8711_shutdown,
 334         .digital_mute = wm8711_mute,
 335         .set_sysclk = wm8711_set_dai_sysclk,
 336         .set_fmt = wm8711_set_dai_fmt,
 337 };
 338
 339 static struct snd_soc_dai_driver wm8711_dai = {
 340         .name = "wm8711-hifi",
 341         .playback = {
 342                 .stream_name = "Playback",
 343                 .channels_min = 1,
 344                 .channels_max = 2,
 345                 .rates = WM8711_RATES,
 346                 .formats = WM8711_FORMATS,
 347         },
 348         .ops = &wm8711_ops,
 349 };
 350
 351 static int wm8711_suspend(struct snd_soc_codec *codec, pm_message_t state)
 352 {
 353         snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 354         wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
 355         return 0;
 356 }
 357
 358 static int wm8711_resume(struct snd_soc_codec *codec)
 359 {
 360         int i;
 361         u8 data[2];
 362         u16 *cache = codec->reg_cache;
 363
 364         /* Sync reg_cache with the hardware */
 365         for (i = 0; i < ARRAY_SIZE(wm8711_reg); i++) {
 366                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 367                 data[1] = cache[i] & 0x00ff;
 368                 codec->hw_write(codec->control_data, data, 2);
 369         }
 370         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 371
 372         return 0;
 373 }
 374
 375 static int wm8711_probe(struct snd_soc_codec *codec)
 376 {
 377         struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
 378         int ret, reg;
 379
 380         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8711->bus_type);
 381         if (ret < 0) {
 382                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 383                 return ret;
 384         }
 385
 386         ret = wm8711_reset(codec);
 387         if (ret < 0) {
 388                 dev_err(codec->dev, "Failed to issue reset\n");
 389                 return ret;
 390         }
 391
 392         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 393
 394         /* Latch the update bits */
 395         reg = snd_soc_read(codec, WM8711_LOUT1V);
 396         snd_soc_write(codec, WM8711_LOUT1V, reg | 0x0100);
 397         reg = snd_soc_read(codec, WM8711_ROUT1V);
 398         snd_soc_write(codec, WM8711_ROUT1V, reg | 0x0100);
 399
 400         snd_soc_add_controls(codec, wm8711_snd_controls,
 401                              ARRAY_SIZE(wm8711_snd_controls));
 402         wm8711_add_widgets(codec);
 403
 404         return ret;
 405
 406 }
 407
 408 /* power down chip */
 409 static int wm8711_remove(struct snd_soc_codec *codec)
 410 {
 411         wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
 412         return 0;
 413 }
 414
 415 static struct snd_soc_codec_driver soc_codec_dev_wm8711 = {
 416         .probe =        wm8711_probe,
 417         .remove =       wm8711_remove,
 418         .suspend =      wm8711_suspend,
 419         .resume =       wm8711_resume,
 420         .set_bias_level = wm8711_set_bias_level,
 421         .reg_cache_size = ARRAY_SIZE(wm8711_reg),
 422         .reg_word_size = sizeof(u16),
 423         .reg_cache_default = wm8711_reg,
 424 };
 425
 426 #if defined(CONFIG_SPI_MASTER)
 427 static int __devinit wm8711_spi_probe(struct spi_device *spi)
 428 {
 429         struct wm8711_priv *wm8711;
 430         int ret;
 431
 432         wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL);
 433         if (wm8711 == NULL)
 434                 return -ENOMEM;
 435
 436         spi_set_drvdata(spi, wm8711);
 437         wm8711->bus_type = SND_SOC_SPI;
 438
 439         ret = snd_soc_register_codec(&spi->dev,
 440                         &soc_codec_dev_wm8711, &wm8711_dai, 1);
 441         if (ret < 0)
 442                 kfree(wm8711);
 443         return ret;
 444 }
 445
 446 static int __devexit wm8711_spi_remove(struct spi_device *spi)
 447 {
 448         snd_soc_unregister_codec(&spi->dev);
 449         kfree(spi_get_drvdata(spi));
 450         return 0;
 451 }
 452
 453 static struct spi_driver wm8711_spi_driver = {
 454         .driver = {
 455                 .name   = "wm8711-codec",
 456                 .owner  = THIS_MODULE,
 457         },
 458         .probe          = wm8711_spi_probe,
 459         .remove         = __devexit_p(wm8711_spi_remove),
 460 };
 461 #endif /* CONFIG_SPI_MASTER */
 462
 463 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 464 static __devinit int wm8711_i2c_probe(struct i2c_client *client,
 465                                       const struct i2c_device_id *id)
 466 {
 467         struct wm8711_priv *wm8711;
 468         int ret;
 469
 470         wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL);
 471         if (wm8711 == NULL)
 472                 return -ENOMEM;
 473
 474         i2c_set_clientdata(client, wm8711);
 475         wm8711->bus_type = SND_SOC_I2C;
 476
 477         ret =  snd_soc_register_codec(&client->dev,
 478                         &soc_codec_dev_wm8711, &wm8711_dai, 1);
 479         if (ret < 0)
 480                 kfree(wm8711);
 481         return ret;
 482 }
 483
 484 static __devexit int wm8711_i2c_remove(struct i2c_client *client)
 485 {
 486         snd_soc_unregister_codec(&client->dev);
 487         kfree(i2c_get_clientdata(client));
 488         return 0;
 489 }
 490
 491 static const struct i2c_device_id wm8711_i2c_id[] = {
 492         { "wm8711", 0 },
 493         { }
 494 };
 495 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
 496
 497 static struct i2c_driver wm8711_i2c_driver = {
 498         .driver = {
 499                 .name = "wm8711-codec",
 500                 .owner = THIS_MODULE,
 501         },
 502         .probe =    wm8711_i2c_probe,
 503         .remove =   __devexit_p(wm8711_i2c_remove),
 504         .id_table = wm8711_i2c_id,
 505 };
 506 #endif
 507
 508 static int __init wm8711_modinit(void)
 509 {
 510         int ret;
 511 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 512         ret = i2c_add_driver(&wm8711_i2c_driver);
 513         if (ret != 0) {
 514                 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
 515                        ret);
 516         }
 517 #endif
 518 #if defined(CONFIG_SPI_MASTER)
 519         ret = spi_register_driver(&wm8711_spi_driver);
 520         if (ret != 0) {
 521                 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
 522                        ret);
 523         }
 524 #endif
 525         return 0;
 526 }
 527 module_init(wm8711_modinit);
 528
 529 static void __exit wm8711_exit(void)
 530 {
 531 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 532         i2c_del_driver(&wm8711_i2c_driver);
 533 #endif
 534 #if defined(CONFIG_SPI_MASTER)
 535         spi_unregister_driver(&wm8711_spi_driver);
 536 #endif
 537 }
 538 module_exit(wm8711_exit);
 539
 540 MODULE_DESCRIPTION("ASoC WM8711 driver");
 541 MODULE_AUTHOR("Mike Arthur");
 542 MODULE_LICENSE("GPL");