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 <Mike.Arthur@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 <linux/of_device.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/tlv.h>
  30 #include <sound/initval.h>
  31
  32 #include "wm8711.h"
  33
  34 /* codec private data */
  35 struct wm8711_priv {
  36         enum snd_soc_control_type bus_type;
  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 wm8711_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 struct _coeff_div {
  94         u32 mclk;
  95         u32 rate;
  96         u16 fs;
  97         u8 sr:4;
  98         u8 bosr:1;
  99         u8 usb:1;
 100 };
 101
 102 /* codec mclk clock divider coefficients */
 103 static const struct _coeff_div coeff_div[] = {
 104         /* 48k */
 105         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 106         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 107         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 108
 109         /* 32k */
 110         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 111         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 112         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 113
 114         /* 8k */
 115         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 116         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 117         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 118         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 119         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 120
 121         /* 96k */
 122         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 123         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 124         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 125
 126         /* 44.1k */
 127         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 128         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 129         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 130
 131         /* 88.2k */
 132         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 133         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 134         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 135 };
 136
 137 static inline int get_coeff(int mclk, int rate)
 138 {
 139         int i;
 140
 141         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 142                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 143                         return i;
 144         }
 145         return 0;
 146 }
 147
 148 static int wm8711_hw_params(struct snd_pcm_substream *substream,
 149         struct snd_pcm_hw_params *params,
 150         struct snd_soc_dai *dai)
 151 {
 152         struct snd_soc_codec *codec = dai->codec;
 153         struct wm8711_priv *wm8711 =  snd_soc_codec_get_drvdata(codec);
 154         u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfffc;
 155         int i = get_coeff(wm8711->sysclk, params_rate(params));
 156         u16 srate = (coeff_div[i].sr << 2) |
 157                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 158
 159         snd_soc_write(codec, WM8711_SRATE, srate);
 160
 161         /* bit size */
 162         switch (params_format(params)) {
 163         case SNDRV_PCM_FORMAT_S16_LE:
 164                 break;
 165         case SNDRV_PCM_FORMAT_S20_3LE:
 166                 iface |= 0x0004;
 167                 break;
 168         case SNDRV_PCM_FORMAT_S24_LE:
 169                 iface |= 0x0008;
 170                 break;
 171         }
 172
 173         snd_soc_write(codec, WM8711_IFACE, iface);
 174         return 0;
 175 }
 176
 177 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
 178                               struct snd_soc_dai *dai)
 179 {
 180         struct snd_soc_codec *codec = dai->codec;
 181
 182         /* set active */
 183         snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
 184
 185         return 0;
 186 }
 187
 188 static void wm8711_shutdown(struct snd_pcm_substream *substream,
 189                             struct snd_soc_dai *dai)
 190 {
 191         struct snd_soc_codec *codec = dai->codec;
 192
 193         /* deactivate */
 194         if (!codec->active) {
 195                 udelay(50);
 196                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 197         }
 198 }
 199
 200 static int wm8711_mute(struct snd_soc_dai *dai, int mute)
 201 {
 202         struct snd_soc_codec *codec = dai->codec;
 203         u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
 204
 205         if (mute)
 206                 snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8);
 207         else
 208                 snd_soc_write(codec, WM8711_APDIGI, mute_reg);
 209
 210         return 0;
 211 }
 212
 213 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 214                 int clk_id, unsigned int freq, int dir)
 215 {
 216         struct snd_soc_codec *codec = codec_dai->codec;
 217         struct wm8711_priv *wm8711 =  snd_soc_codec_get_drvdata(codec);
 218
 219         switch (freq) {
 220         case 11289600:
 221         case 12000000:
 222         case 12288000:
 223         case 16934400:
 224         case 18432000:
 225                 wm8711->sysclk = freq;
 226                 return 0;
 227         }
 228         return -EINVAL;
 229 }
 230
 231 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
 232                 unsigned int fmt)
 233 {
 234         struct snd_soc_codec *codec = codec_dai->codec;
 235         u16 iface = 0;
 236
 237         /* set master/slave audio interface */
 238         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 239         case SND_SOC_DAIFMT_CBM_CFM:
 240                 iface |= 0x0040;
 241                 break;
 242         case SND_SOC_DAIFMT_CBS_CFS:
 243                 break;
 244         default:
 245                 return -EINVAL;
 246         }
 247
 248         /* interface format */
 249         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 250         case SND_SOC_DAIFMT_I2S:
 251                 iface |= 0x0002;
 252                 break;
 253         case SND_SOC_DAIFMT_RIGHT_J:
 254                 break;
 255         case SND_SOC_DAIFMT_LEFT_J:
 256                 iface |= 0x0001;
 257                 break;
 258         case SND_SOC_DAIFMT_DSP_A:
 259                 iface |= 0x0003;
 260                 break;
 261         case SND_SOC_DAIFMT_DSP_B:
 262                 iface |= 0x0013;
 263                 break;
 264         default:
 265                 return -EINVAL;
 266         }
 267
 268         /* clock inversion */
 269         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 270         case SND_SOC_DAIFMT_NB_NF:
 271                 break;
 272         case SND_SOC_DAIFMT_IB_IF:
 273                 iface |= 0x0090;
 274                 break;
 275         case SND_SOC_DAIFMT_IB_NF:
 276                 iface |= 0x0080;
 277                 break;
 278         case SND_SOC_DAIFMT_NB_IF:
 279                 iface |= 0x0010;
 280                 break;
 281         default:
 282                 return -EINVAL;
 283         }
 284
 285         /* set iface */
 286         snd_soc_write(codec, WM8711_IFACE, iface);
 287         return 0;
 288 }
 289
 290 static int wm8711_set_bias_level(struct snd_soc_codec *codec,
 291         enum snd_soc_bias_level level)
 292 {
 293         u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
 294
 295         switch (level) {
 296         case SND_SOC_BIAS_ON:
 297                 snd_soc_write(codec, WM8711_PWR, reg);
 298                 break;
 299         case SND_SOC_BIAS_PREPARE:
 300                 break;
 301         case SND_SOC_BIAS_STANDBY:
 302                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
 303                         snd_soc_cache_sync(codec);
 304
 305                 snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
 306                 break;
 307         case SND_SOC_BIAS_OFF:
 308                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 309                 snd_soc_write(codec, WM8711_PWR, 0xffff);
 310                 break;
 311         }
 312         codec->dapm.bias_level = level;
 313         return 0;
 314 }
 315
 316 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000
 317
 318 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 319         SNDRV_PCM_FMTBIT_S24_LE)
 320
 321 static struct snd_soc_dai_ops wm8711_ops = {
 322         .prepare = wm8711_pcm_prepare,
 323         .hw_params = wm8711_hw_params,
 324         .shutdown = wm8711_shutdown,
 325         .digital_mute = wm8711_mute,
 326         .set_sysclk = wm8711_set_dai_sysclk,
 327         .set_fmt = wm8711_set_dai_fmt,
 328 };
 329
 330 static struct snd_soc_dai_driver wm8711_dai = {
 331         .name = "wm8711-hifi",
 332         .playback = {
 333                 .stream_name = "Playback",
 334                 .channels_min = 1,
 335                 .channels_max = 2,
 336                 .rates = WM8711_RATES,
 337                 .formats = WM8711_FORMATS,
 338         },
 339         .ops = &wm8711_ops,
 340 };
 341
 342 static int wm8711_suspend(struct snd_soc_codec *codec, pm_message_t state)
 343 {
 344         snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 345         wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
 346         return 0;
 347 }
 348
 349 static int wm8711_resume(struct snd_soc_codec *codec)
 350 {
 351         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 352         return 0;
 353 }
 354
 355 static int wm8711_probe(struct snd_soc_codec *codec)
 356 {
 357         struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
 358         int ret;
 359
 360         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8711->bus_type);
 361         if (ret < 0) {
 362                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 363                 return ret;
 364         }
 365
 366         ret = wm8711_reset(codec);
 367         if (ret < 0) {
 368                 dev_err(codec->dev, "Failed to issue reset\n");
 369                 return ret;
 370         }
 371
 372         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 373
 374         /* Latch the update bits */
 375         snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100);
 376         snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100);
 377
 378         snd_soc_add_controls(codec, wm8711_snd_controls,
 379                              ARRAY_SIZE(wm8711_snd_controls));
 380
 381         return ret;
 382
 383 }
 384
 385 /* power down chip */
 386 static int wm8711_remove(struct snd_soc_codec *codec)
 387 {
 388         wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
 389         return 0;
 390 }
 391
 392 static struct snd_soc_codec_driver soc_codec_dev_wm8711 = {
 393         .probe =        wm8711_probe,
 394         .remove =       wm8711_remove,
 395         .suspend =      wm8711_suspend,
 396         .resume =       wm8711_resume,
 397         .set_bias_level = wm8711_set_bias_level,
 398         .reg_cache_size = ARRAY_SIZE(wm8711_reg),
 399         .reg_word_size = sizeof(u16),
 400         .reg_cache_default = wm8711_reg,
 401         .dapm_widgets = wm8711_dapm_widgets,
 402         .num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets),
 403         .dapm_routes = wm8711_intercon,
 404         .num_dapm_routes = ARRAY_SIZE(wm8711_intercon),
 405 };
 406
 407 static const struct of_device_id wm8711_of_match[] = {
 408         { .compatible = "wlf,wm8711", },
 409         { }
 410 };
 411 MODULE_DEVICE_TABLE(of, wm8711_of_match);
 412
 413 #if defined(CONFIG_SPI_MASTER)
 414 static int __devinit wm8711_spi_probe(struct spi_device *spi)
 415 {
 416         struct wm8711_priv *wm8711;
 417         int ret;
 418
 419         wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL);
 420         if (wm8711 == NULL)
 421                 return -ENOMEM;
 422
 423         spi_set_drvdata(spi, wm8711);
 424         wm8711->bus_type = SND_SOC_SPI;
 425
 426         ret = snd_soc_register_codec(&spi->dev,
 427                         &soc_codec_dev_wm8711, &wm8711_dai, 1);
 428         if (ret < 0)
 429                 kfree(wm8711);
 430         return ret;
 431 }
 432
 433 static int __devexit wm8711_spi_remove(struct spi_device *spi)
 434 {
 435         snd_soc_unregister_codec(&spi->dev);
 436         kfree(spi_get_drvdata(spi));
 437         return 0;
 438 }
 439
 440 static struct spi_driver wm8711_spi_driver = {
 441         .driver = {
 442                 .name   = "wm8711",
 443                 .owner  = THIS_MODULE,
 444                 .of_match_table = wm8711_of_match,
 445         },
 446         .probe          = wm8711_spi_probe,
 447         .remove         = __devexit_p(wm8711_spi_remove),
 448 };
 449 #endif /* CONFIG_SPI_MASTER */
 450
 451 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 452 static __devinit int wm8711_i2c_probe(struct i2c_client *client,
 453                                       const struct i2c_device_id *id)
 454 {
 455         struct wm8711_priv *wm8711;
 456         int ret;
 457
 458         wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL);
 459         if (wm8711 == NULL)
 460                 return -ENOMEM;
 461
 462         i2c_set_clientdata(client, wm8711);
 463         wm8711->bus_type = SND_SOC_I2C;
 464
 465         ret =  snd_soc_register_codec(&client->dev,
 466                         &soc_codec_dev_wm8711, &wm8711_dai, 1);
 467         if (ret < 0)
 468                 kfree(wm8711);
 469         return ret;
 470 }
 471
 472 static __devexit int wm8711_i2c_remove(struct i2c_client *client)
 473 {
 474         snd_soc_unregister_codec(&client->dev);
 475         kfree(i2c_get_clientdata(client));
 476         return 0;
 477 }
 478
 479 static const struct i2c_device_id wm8711_i2c_id[] = {
 480         { "wm8711", 0 },
 481         { }
 482 };
 483 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
 484
 485 static struct i2c_driver wm8711_i2c_driver = {
 486         .driver = {
 487                 .name = "wm8711",
 488                 .owner = THIS_MODULE,
 489                 .of_match_table = wm8711_of_match,
 490         },
 491         .probe =    wm8711_i2c_probe,
 492         .remove =   __devexit_p(wm8711_i2c_remove),
 493         .id_table = wm8711_i2c_id,
 494 };
 495 #endif
 496
 497 static int __init wm8711_modinit(void)
 498 {
 499         int ret;
 500 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 501         ret = i2c_add_driver(&wm8711_i2c_driver);
 502         if (ret != 0) {
 503                 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
 504                        ret);
 505         }
 506 #endif
 507 #if defined(CONFIG_SPI_MASTER)
 508         ret = spi_register_driver(&wm8711_spi_driver);
 509         if (ret != 0) {
 510                 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
 511                        ret);
 512         }
 513 #endif
 514         return 0;
 515 }
 516 module_init(wm8711_modinit);
 517
 518 static void __exit wm8711_exit(void)
 519 {
 520 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 521         i2c_del_driver(&wm8711_i2c_driver);
 522 #endif
 523 #if defined(CONFIG_SPI_MASTER)
 524         spi_unregister_driver(&wm8711_spi_driver);
 525 #endif
 526 }
 527 module_exit(wm8711_exit);
 528
 529 MODULE_DESCRIPTION("ASoC WM8711 driver");
 530 MODULE_AUTHOR("Mike Arthur");
 531 MODULE_LICENSE("GPL");