sound/soc/codecs/uda134x.c

   1 /*
   2  * uda134x.c  --  UDA134X ALSA SoC Codec driver
   3  *
   4  * Modifications by Christian Pellegrin <chripell@evolware.org>
   5  *
   6  * Copyright 2007 Dension Audio Systems Ltd.
   7  * Author: Zoltan Devai
   8  *
   9  * Based on the WM87xx drivers by Liam Girdwood and Richard Purdie
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/delay.h>
  18 #include <linux/slab.h>
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/soc.h>
  22 #include <sound/initval.h>
  23
  24 #include <sound/uda134x.h>
  25 #include <sound/l3.h>
  26
  27 #include "uda134x.h"
  28
  29
  30 #define UDA134X_RATES SNDRV_PCM_RATE_8000_48000
  31 #define UDA134X_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
  32                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE)
  33
  34 struct uda134x_priv {
  35         int sysclk;
  36         int dai_fmt;
  37
  38         struct snd_pcm_substream *master_substream;
  39         struct snd_pcm_substream *slave_substream;
  40 };
  41
  42 /* In-data addresses are hard-coded into the reg-cache values */
  43 static const char uda134x_reg[UDA134X_REGS_NUM] = {
  44         /* Extended address registers */
  45         0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
  46         /* Status, data regs */
  47         0x00, 0x83, 0x00, 0x40, 0x80, 0xC0, 0x00,
  48 };
  49
  50 /*
  51  * The codec has no support for reading its registers except for peak level...
  52  */
  53 static inline unsigned int uda134x_read_reg_cache(struct snd_soc_codec *codec,
  54         unsigned int reg)
  55 {
  56         u8 *cache = codec->reg_cache;
  57
  58         if (reg >= UDA134X_REGS_NUM)
  59                 return -1;
  60         return cache[reg];
  61 }
  62
  63 /*
  64  * Write the register cache
  65  */
  66 static inline void uda134x_write_reg_cache(struct snd_soc_codec *codec,
  67         u8 reg, unsigned int value)
  68 {
  69         u8 *cache = codec->reg_cache;
  70
  71         if (reg >= UDA134X_REGS_NUM)
  72                 return;
  73         cache[reg] = value;
  74 }
  75
  76 /*
  77  * Write to the uda134x registers
  78  *
  79  */
  80 static int uda134x_write(struct snd_soc_codec *codec, unsigned int reg,
  81         unsigned int value)
  82 {
  83         int ret;
  84         u8 addr;
  85         u8 data = value;
  86         struct uda134x_platform_data *pd = codec->control_data;
  87
  88         pr_debug("%s reg: %02X, value:%02X\n", __func__, reg, value);
  89
  90         if (reg >= UDA134X_REGS_NUM) {
  91                 printk(KERN_ERR "%s unknown register: reg: %u",
  92                        __func__, reg);
  93                 return -EINVAL;
  94         }
  95
  96         uda134x_write_reg_cache(codec, reg, value);
  97
  98         switch (reg) {
  99         case UDA134X_STATUS0:
 100         case UDA134X_STATUS1:
 101                 addr = UDA134X_STATUS_ADDR;
 102                 break;
 103         case UDA134X_DATA000:
 104         case UDA134X_DATA001:
 105         case UDA134X_DATA010:
 106         case UDA134X_DATA011:
 107                 addr = UDA134X_DATA0_ADDR;
 108                 break;
 109         case UDA134X_DATA1:
 110                 addr = UDA134X_DATA1_ADDR;
 111                 break;
 112         default:
 113                 /* It's an extended address register */
 114                 addr =  (reg | UDA134X_EXTADDR_PREFIX);
 115
 116                 ret = l3_write(&pd->l3,
 117                                UDA134X_DATA0_ADDR, &addr, 1);
 118                 if (ret != 1)
 119                         return -EIO;
 120
 121                 addr = UDA134X_DATA0_ADDR;
 122                 data = (value | UDA134X_EXTDATA_PREFIX);
 123                 break;
 124         }
 125
 126         ret = l3_write(&pd->l3,
 127                        addr, &data, 1);
 128         if (ret != 1)
 129                 return -EIO;
 130
 131         return 0;
 132 }
 133
 134 static inline void uda134x_reset(struct snd_soc_codec *codec)
 135 {
 136         u8 reset_reg = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
 137         uda134x_write(codec, UDA134X_STATUS0, reset_reg | (1<<6));
 138         msleep(1);
 139         uda134x_write(codec, UDA134X_STATUS0, reset_reg & ~(1<<6));
 140 }
 141
 142 static int uda134x_mute(struct snd_soc_dai *dai, int mute)
 143 {
 144         struct snd_soc_codec *codec = dai->codec;
 145         u8 mute_reg = uda134x_read_reg_cache(codec, UDA134X_DATA010);
 146
 147         pr_debug("%s mute: %d\n", __func__, mute);
 148
 149         if (mute)
 150                 mute_reg |= (1<<2);
 151         else
 152                 mute_reg &= ~(1<<2);
 153
 154         uda134x_write(codec, UDA134X_DATA010, mute_reg);
 155
 156         return 0;
 157 }
 158
 159 static int uda134x_startup(struct snd_pcm_substream *substream,
 160         struct snd_soc_dai *dai)
 161 {
 162         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 163         struct snd_soc_codec *codec =rtd->codec;
 164         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 165         struct snd_pcm_runtime *master_runtime;
 166
 167         if (uda134x->master_substream) {
 168                 master_runtime = uda134x->master_substream->runtime;
 169
 170                 pr_debug("%s constraining to %d bits at %d\n", __func__,
 171                          master_runtime->sample_bits,
 172                          master_runtime->rate);
 173
 174                 snd_pcm_hw_constraint_minmax(substream->runtime,
 175                                              SNDRV_PCM_HW_PARAM_RATE,
 176                                              master_runtime->rate,
 177                                              master_runtime->rate);
 178
 179                 snd_pcm_hw_constraint_minmax(substream->runtime,
 180                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 181                                              master_runtime->sample_bits,
 182                                              master_runtime->sample_bits);
 183
 184                 uda134x->slave_substream = substream;
 185         } else
 186                 uda134x->master_substream = substream;
 187
 188         return 0;
 189 }
 190
 191 static void uda134x_shutdown(struct snd_pcm_substream *substream,
 192         struct snd_soc_dai *dai)
 193 {
 194         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 195         struct snd_soc_codec *codec = rtd->codec;
 196         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 197
 198         if (uda134x->master_substream == substream)
 199                 uda134x->master_substream = uda134x->slave_substream;
 200
 201         uda134x->slave_substream = NULL;
 202 }
 203
 204 static int uda134x_hw_params(struct snd_pcm_substream *substream,
 205         struct snd_pcm_hw_params *params,
 206         struct snd_soc_dai *dai)
 207 {
 208         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 209         struct snd_soc_codec *codec = rtd->codec;
 210         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 211         u8 hw_params;
 212
 213         if (substream == uda134x->slave_substream) {
 214                 pr_debug("%s ignoring hw_params for slave substream\n",
 215                          __func__);
 216                 return 0;
 217         }
 218
 219         hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
 220         hw_params &= STATUS0_SYSCLK_MASK;
 221         hw_params &= STATUS0_DAIFMT_MASK;
 222
 223         pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 224                  uda134x->sysclk, params_rate(params));
 225
 226         /* set SYSCLK / fs ratio */
 227         switch (uda134x->sysclk / params_rate(params)) {
 228         case 512:
 229                 break;
 230         case 384:
 231                 hw_params |= (1<<4);
 232                 break;
 233         case 256:
 234                 hw_params |= (1<<5);
 235                 break;
 236         default:
 237                 printk(KERN_ERR "%s unsupported fs\n", __func__);
 238                 return -EINVAL;
 239         }
 240
 241         pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
 242                  uda134x->dai_fmt, params_format(params));
 243
 244         /* set DAI format and word length */
 245         switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 246         case SND_SOC_DAIFMT_I2S:
 247                 break;
 248         case SND_SOC_DAIFMT_RIGHT_J:
 249                 switch (params_format(params)) {
 250                 case SNDRV_PCM_FORMAT_S16_LE:
 251                         hw_params |= (1<<1);
 252                         break;
 253                 case SNDRV_PCM_FORMAT_S18_3LE:
 254                         hw_params |= (1<<2);
 255                         break;
 256                 case SNDRV_PCM_FORMAT_S20_3LE:
 257                         hw_params |= ((1<<2) | (1<<1));
 258                         break;
 259                 default:
 260                         printk(KERN_ERR "%s unsupported format (right)\n",
 261                                __func__);
 262                         return -EINVAL;
 263                 }
 264                 break;
 265         case SND_SOC_DAIFMT_LEFT_J:
 266                 hw_params |= (1<<3);
 267                 break;
 268         default:
 269                 printk(KERN_ERR "%s unsupported format\n", __func__);
 270                 return -EINVAL;
 271         }
 272
 273         uda134x_write(codec, UDA134X_STATUS0, hw_params);
 274
 275         return 0;
 276 }
 277
 278 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 279                                   int clk_id, unsigned int freq, int dir)
 280 {
 281         struct snd_soc_codec *codec = codec_dai->codec;
 282         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 283
 284         pr_debug("%s clk_id: %d, freq: %u, dir: %d\n", __func__,
 285                  clk_id, freq, dir);
 286
 287         /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
 288            because the codec is slave. Of course limitations of the clock
 289            master (the IIS controller) apply.
 290            We'll error out on set_hw_params if it's not OK */
 291         if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
 292                 uda134x->sysclk = freq;
 293                 return 0;
 294         }
 295
 296         printk(KERN_ERR "%s unsupported sysclk\n", __func__);
 297         return -EINVAL;
 298 }
 299
 300 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 301                                unsigned int fmt)
 302 {
 303         struct snd_soc_codec *codec = codec_dai->codec;
 304         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 305
 306         pr_debug("%s fmt: %08X\n", __func__, fmt);
 307
 308         /* codec supports only full slave mode */
 309         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 310                 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
 311                 return -EINVAL;
 312         }
 313
 314         /* no support for clock inversion */
 315         if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
 316                 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
 317                 return -EINVAL;
 318         }
 319
 320         /* We can't setup DAI format here as it depends on the word bit num */
 321         /* so let's just store the value for later */
 322         uda134x->dai_fmt = fmt;
 323
 324         return 0;
 325 }
 326
 327 static int uda134x_set_bias_level(struct snd_soc_codec *codec,
 328                                   enum snd_soc_bias_level level)
 329 {
 330         u8 reg;
 331         struct uda134x_platform_data *pd = codec->control_data;
 332         int i;
 333         u8 *cache = codec->reg_cache;
 334
 335         pr_debug("%s bias level %d\n", __func__, level);
 336
 337         switch (level) {
 338         case SND_SOC_BIAS_ON:
 339                 /* ADC, DAC on */
 340                 switch (pd->model) {
 341                 case UDA134X_UDA1340:
 342                 case UDA134X_UDA1344:
 343                 case UDA134X_UDA1345:
 344                         reg = uda134x_read_reg_cache(codec, UDA134X_DATA011);
 345                         uda134x_write(codec, UDA134X_DATA011, reg | 0x03);
 346                         break;
 347                 case UDA134X_UDA1341:
 348                         reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
 349                         uda134x_write(codec, UDA134X_STATUS1, reg | 0x03);
 350                         break;
 351                 default:
 352                         printk(KERN_ERR "UDA134X SoC codec: "
 353                                "unsupported model %d\n", pd->model);
 354                         return -EINVAL;
 355                 }
 356                 break;
 357         case SND_SOC_BIAS_PREPARE:
 358                 /* power on */
 359                 if (pd->power) {
 360                         pd->power(1);
 361                         /* Sync reg_cache with the hardware */
 362                         for (i = 0; i < ARRAY_SIZE(uda134x_reg); i++)
 363                                 codec->driver->write(codec, i, *cache++);
 364                 }
 365                 break;
 366         case SND_SOC_BIAS_STANDBY:
 367                 /* ADC, DAC power off */
 368                 switch (pd->model) {
 369                 case UDA134X_UDA1340:
 370                 case UDA134X_UDA1344:
 371                 case UDA134X_UDA1345:
 372                         reg = uda134x_read_reg_cache(codec, UDA134X_DATA011);
 373                         uda134x_write(codec, UDA134X_DATA011, reg & ~(0x03));
 374                         break;
 375                 case UDA134X_UDA1341:
 376                         reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
 377                         uda134x_write(codec, UDA134X_STATUS1, reg & ~(0x03));
 378                         break;
 379                 default:
 380                         printk(KERN_ERR "UDA134X SoC codec: "
 381                                "unsupported model %d\n", pd->model);
 382                         return -EINVAL;
 383                 }
 384                 break;
 385         case SND_SOC_BIAS_OFF:
 386                 /* power off */
 387                 if (pd->power)
 388                         pd->power(0);
 389                 break;
 390         }
 391         codec->dapm.bias_level = level;
 392         return 0;
 393 }
 394
 395 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
 396                                             "Minimum2", "Maximum"};
 397 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 398 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
 399                                         "Analog2", "Both"};
 400
 401 static const struct soc_enum uda134x_mixer_enum[] = {
 402 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
 403 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
 404 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
 405 };
 406
 407 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
 408 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 409 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
 410 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
 411 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
 412
 413 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
 414 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
 415
 416 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 417 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 418
 419 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 420 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 421 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
 422
 423 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
 424 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
 425 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
 426
 427 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
 428 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
 429 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
 430 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
 431 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
 432 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 433 };
 434
 435 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
 436 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 437
 438 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 439 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 440
 441 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 442 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 443
 444 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 445 };
 446
 447 static const struct snd_kcontrol_new uda1345_snd_controls[] = {
 448 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 449
 450 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 451
 452 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 453 };
 454
 455 static const struct snd_soc_dai_ops uda134x_dai_ops = {
 456         .startup        = uda134x_startup,
 457         .shutdown       = uda134x_shutdown,
 458         .hw_params      = uda134x_hw_params,
 459         .digital_mute   = uda134x_mute,
 460         .set_sysclk     = uda134x_set_dai_sysclk,
 461         .set_fmt        = uda134x_set_dai_fmt,
 462 };
 463
 464 static struct snd_soc_dai_driver uda134x_dai = {
 465         .name = "uda134x-hifi",
 466         /* playback capabilities */
 467         .playback = {
 468                 .stream_name = "Playback",
 469                 .channels_min = 1,
 470                 .channels_max = 2,
 471                 .rates = UDA134X_RATES,
 472                 .formats = UDA134X_FORMATS,
 473         },
 474         /* capture capabilities */
 475         .capture = {
 476                 .stream_name = "Capture",
 477                 .channels_min = 1,
 478                 .channels_max = 2,
 479                 .rates = UDA134X_RATES,
 480                 .formats = UDA134X_FORMATS,
 481         },
 482         /* pcm operations */
 483         .ops = &uda134x_dai_ops,
 484 };
 485
 486 static int uda134x_soc_probe(struct snd_soc_codec *codec)
 487 {
 488         struct uda134x_priv *uda134x;
 489         struct uda134x_platform_data *pd = codec->card->dev->platform_data;
 490
 491         int ret;
 492
 493         printk(KERN_INFO "UDA134X SoC Audio Codec\n");
 494
 495         if (!pd) {
 496                 printk(KERN_ERR "UDA134X SoC codec: "
 497                        "missing L3 bitbang function\n");
 498                 return -ENODEV;
 499         }
 500
 501         switch (pd->model) {
 502         case UDA134X_UDA1340:
 503         case UDA134X_UDA1341:
 504         case UDA134X_UDA1344:
 505         case UDA134X_UDA1345:
 506                 break;
 507         default:
 508                 printk(KERN_ERR "UDA134X SoC codec: "
 509                        "unsupported model %d\n",
 510                         pd->model);
 511                 return -EINVAL;
 512         }
 513
 514         uda134x = kzalloc(sizeof(struct uda134x_priv), GFP_KERNEL);
 515         if (uda134x == NULL)
 516                 return -ENOMEM;
 517         snd_soc_codec_set_drvdata(codec, uda134x);
 518
 519         codec->control_data = pd;
 520
 521         if (pd->power)
 522                 pd->power(1);
 523
 524         uda134x_reset(codec);
 525
 526         if (pd->is_powered_on_standby)
 527                 uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 528         else
 529                 uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 530
 531         switch (pd->model) {
 532         case UDA134X_UDA1340:
 533         case UDA134X_UDA1344:
 534                 ret = snd_soc_add_codec_controls(codec, uda1340_snd_controls,
 535                                         ARRAY_SIZE(uda1340_snd_controls));
 536         break;
 537         case UDA134X_UDA1341:
 538                 ret = snd_soc_add_codec_controls(codec, uda1341_snd_controls,
 539                                         ARRAY_SIZE(uda1341_snd_controls));
 540         break;
 541         case UDA134X_UDA1345:
 542                 ret = snd_soc_add_codec_controls(codec, uda1345_snd_controls,
 543                                         ARRAY_SIZE(uda1345_snd_controls));
 544         break;
 545         default:
 546                 printk(KERN_ERR "%s unknown codec type: %d",
 547                         __func__, pd->model);
 548                 kfree(uda134x);
 549                 return -EINVAL;
 550         }
 551
 552         if (ret < 0) {
 553                 printk(KERN_ERR "UDA134X: failed to register controls\n");
 554                 kfree(uda134x);
 555                 return ret;
 556         }
 557
 558         return 0;
 559 }
 560
 561 /* power down chip */
 562 static int uda134x_soc_remove(struct snd_soc_codec *codec)
 563 {
 564         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 565
 566         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 567         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 568
 569         kfree(uda134x);
 570         return 0;
 571 }
 572
 573 #if defined(CONFIG_PM)
 574 static int uda134x_soc_suspend(struct snd_soc_codec *codec)
 575 {
 576         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 577         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 578         return 0;
 579 }
 580
 581 static int uda134x_soc_resume(struct snd_soc_codec *codec)
 582 {
 583         uda134x_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 584         uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 585         return 0;
 586 }
 587 #else
 588 #define uda134x_soc_suspend NULL
 589 #define uda134x_soc_resume NULL
 590 #endif /* CONFIG_PM */
 591
 592 static struct snd_soc_codec_driver soc_codec_dev_uda134x = {
 593         .probe =        uda134x_soc_probe,
 594         .remove =       uda134x_soc_remove,
 595         .suspend =      uda134x_soc_suspend,
 596         .resume =       uda134x_soc_resume,
 597         .reg_cache_size = sizeof(uda134x_reg),
 598         .reg_word_size = sizeof(u8),
 599         .reg_cache_default = uda134x_reg,
 600         .reg_cache_step = 1,
 601         .read = uda134x_read_reg_cache,
 602         .write = uda134x_write,
 603         .set_bias_level = uda134x_set_bias_level,
 604 };
 605
 606 static int __devinit uda134x_codec_probe(struct platform_device *pdev)
 607 {
 608         return snd_soc_register_codec(&pdev->dev,
 609                         &soc_codec_dev_uda134x, &uda134x_dai, 1);
 610 }
 611
 612 static int __devexit uda134x_codec_remove(struct platform_device *pdev)
 613 {
 614         snd_soc_unregister_codec(&pdev->dev);
 615         return 0;
 616 }
 617
 618 static struct platform_driver uda134x_codec_driver = {
 619         .driver = {
 620                 .name = "uda134x-codec",
 621                 .owner = THIS_MODULE,
 622         },
 623         .probe = uda134x_codec_probe,
 624         .remove = __devexit_p(uda134x_codec_remove),
 625 };
 626
 627 module_platform_driver(uda134x_codec_driver);
 628
 629 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
 630 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
 631 MODULE_LICENSE("GPL");