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/soc-dapm.h>
  23 #include <sound/initval.h>
  24
  25 #include <sound/uda134x.h>
  26 #include <sound/l3.h>
  27
  28 #include "uda134x.h"
  29
  30
  31 #define UDA134X_RATES SNDRV_PCM_RATE_8000_48000
  32 #define UDA134X_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
  33                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE)
  34
  35 struct uda134x_priv {
  36         int sysclk;
  37         int dai_fmt;
  38
  39         struct snd_pcm_substream *master_substream;
  40         struct snd_pcm_substream *slave_substream;
  41 };
  42
  43 /* In-data addresses are hard-coded into the reg-cache values */
  44 static const char uda134x_reg[UDA134X_REGS_NUM] = {
  45         /* Extended address registers */
  46         0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
  47         /* Status, data regs */
  48         0x00, 0x83, 0x00, 0x40, 0x80, 0xC0, 0x00,
  49 };
  50
  51 /*
  52  * The codec has no support for reading its registers except for peak level...
  53  */
  54 static inline unsigned int uda134x_read_reg_cache(struct snd_soc_codec *codec,
  55         unsigned int reg)
  56 {
  57         u8 *cache = codec->reg_cache;
  58
  59         if (reg >= UDA134X_REGS_NUM)
  60                 return -1;
  61         return cache[reg];
  62 }
  63
  64 /*
  65  * Write the register cache
  66  */
  67 static inline void uda134x_write_reg_cache(struct snd_soc_codec *codec,
  68         u8 reg, unsigned int value)
  69 {
  70         u8 *cache = codec->reg_cache;
  71
  72         if (reg >= UDA134X_REGS_NUM)
  73                 return;
  74         cache[reg] = value;
  75 }
  76
  77 /*
  78  * Write to the uda134x registers
  79  *
  80  */
  81 static int uda134x_write(struct snd_soc_codec *codec, unsigned int reg,
  82         unsigned int value)
  83 {
  84         int ret;
  85         u8 addr;
  86         u8 data = value;
  87         struct uda134x_platform_data *pd = codec->control_data;
  88
  89         pr_debug("%s reg: %02X, value:%02X\n", __func__, reg, value);
  90
  91         if (reg >= UDA134X_REGS_NUM) {
  92                 printk(KERN_ERR "%s unknown register: reg: %u",
  93                        __func__, reg);
  94                 return -EINVAL;
  95         }
  96
  97         uda134x_write_reg_cache(codec, reg, value);
  98
  99         switch (reg) {
 100         case UDA134X_STATUS0:
 101         case UDA134X_STATUS1:
 102                 addr = UDA134X_STATUS_ADDR;
 103                 break;
 104         case UDA134X_DATA000:
 105         case UDA134X_DATA001:
 106         case UDA134X_DATA010:
 107         case UDA134X_DATA011:
 108                 addr = UDA134X_DATA0_ADDR;
 109                 break;
 110         case UDA134X_DATA1:
 111                 addr = UDA134X_DATA1_ADDR;
 112                 break;
 113         default:
 114                 /* It's an extended address register */
 115                 addr =  (reg | UDA134X_EXTADDR_PREFIX);
 116
 117                 ret = l3_write(&pd->l3,
 118                                UDA134X_DATA0_ADDR, &addr, 1);
 119                 if (ret != 1)
 120                         return -EIO;
 121
 122                 addr = UDA134X_DATA0_ADDR;
 123                 data = (value | UDA134X_EXTDATA_PREFIX);
 124                 break;
 125         }
 126
 127         ret = l3_write(&pd->l3,
 128                        addr, &data, 1);
 129         if (ret != 1)
 130                 return -EIO;
 131
 132         return 0;
 133 }
 134
 135 static inline void uda134x_reset(struct snd_soc_codec *codec)
 136 {
 137         u8 reset_reg = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
 138         uda134x_write(codec, UDA134X_STATUS0, reset_reg | (1<<6));
 139         msleep(1);
 140         uda134x_write(codec, UDA134X_STATUS0, reset_reg & ~(1<<6));
 141 }
 142
 143 static int uda134x_mute(struct snd_soc_dai *dai, int mute)
 144 {
 145         struct snd_soc_codec *codec = dai->codec;
 146         u8 mute_reg = uda134x_read_reg_cache(codec, UDA134X_DATA010);
 147
 148         pr_debug("%s mute: %d\n", __func__, mute);
 149
 150         if (mute)
 151                 mute_reg |= (1<<2);
 152         else
 153                 mute_reg &= ~(1<<2);
 154
 155         uda134x_write(codec, UDA134X_DATA010, mute_reg);
 156
 157         return 0;
 158 }
 159
 160 static int uda134x_startup(struct snd_pcm_substream *substream,
 161         struct snd_soc_dai *dai)
 162 {
 163         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 164         struct snd_soc_codec *codec =rtd->codec;
 165         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 166         struct snd_pcm_runtime *master_runtime;
 167
 168         if (uda134x->master_substream) {
 169                 master_runtime = uda134x->master_substream->runtime;
 170
 171                 pr_debug("%s constraining to %d bits at %d\n", __func__,
 172                          master_runtime->sample_bits,
 173                          master_runtime->rate);
 174
 175                 snd_pcm_hw_constraint_minmax(substream->runtime,
 176                                              SNDRV_PCM_HW_PARAM_RATE,
 177                                              master_runtime->rate,
 178                                              master_runtime->rate);
 179
 180                 snd_pcm_hw_constraint_minmax(substream->runtime,
 181                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 182                                              master_runtime->sample_bits,
 183                                              master_runtime->sample_bits);
 184
 185                 uda134x->slave_substream = substream;
 186         } else
 187                 uda134x->master_substream = substream;
 188
 189         return 0;
 190 }
 191
 192 static void uda134x_shutdown(struct snd_pcm_substream *substream,
 193         struct snd_soc_dai *dai)
 194 {
 195         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 196         struct snd_soc_codec *codec = rtd->codec;
 197         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 198
 199         if (uda134x->master_substream == substream)
 200                 uda134x->master_substream = uda134x->slave_substream;
 201
 202         uda134x->slave_substream = NULL;
 203 }
 204
 205 static int uda134x_hw_params(struct snd_pcm_substream *substream,
 206         struct snd_pcm_hw_params *params,
 207         struct snd_soc_dai *dai)
 208 {
 209         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 210         struct snd_soc_codec *codec = rtd->codec;
 211         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 212         u8 hw_params;
 213
 214         if (substream == uda134x->slave_substream) {
 215                 pr_debug("%s ignoring hw_params for slave substream\n",
 216                          __func__);
 217                 return 0;
 218         }
 219
 220         hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
 221         hw_params &= STATUS0_SYSCLK_MASK;
 222         hw_params &= STATUS0_DAIFMT_MASK;
 223
 224         pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 225                  uda134x->sysclk, params_rate(params));
 226
 227         /* set SYSCLK / fs ratio */
 228         switch (uda134x->sysclk / params_rate(params)) {
 229         case 512:
 230                 break;
 231         case 384:
 232                 hw_params |= (1<<4);
 233                 break;
 234         case 256:
 235                 hw_params |= (1<<5);
 236                 break;
 237         default:
 238                 printk(KERN_ERR "%s unsupported fs\n", __func__);
 239                 return -EINVAL;
 240         }
 241
 242         pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
 243                  uda134x->dai_fmt, params_format(params));
 244
 245         /* set DAI format and word length */
 246         switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 247         case SND_SOC_DAIFMT_I2S:
 248                 break;
 249         case SND_SOC_DAIFMT_RIGHT_J:
 250                 switch (params_format(params)) {
 251                 case SNDRV_PCM_FORMAT_S16_LE:
 252                         hw_params |= (1<<1);
 253                         break;
 254                 case SNDRV_PCM_FORMAT_S18_3LE:
 255                         hw_params |= (1<<2);
 256                         break;
 257                 case SNDRV_PCM_FORMAT_S20_3LE:
 258                         hw_params |= ((1<<2) | (1<<1));
 259                         break;
 260                 default:
 261                         printk(KERN_ERR "%s unsupported format (right)\n",
 262                                __func__);
 263                         return -EINVAL;
 264                 }
 265                 break;
 266         case SND_SOC_DAIFMT_LEFT_J:
 267                 hw_params |= (1<<3);
 268                 break;
 269         default:
 270                 printk(KERN_ERR "%s unsupported format\n", __func__);
 271                 return -EINVAL;
 272         }
 273
 274         uda134x_write(codec, UDA134X_STATUS0, hw_params);
 275
 276         return 0;
 277 }
 278
 279 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 280                                   int clk_id, unsigned int freq, int dir)
 281 {
 282         struct snd_soc_codec *codec = codec_dai->codec;
 283         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 284
 285         pr_debug("%s clk_id: %d, freq: %u, dir: %d\n", __func__,
 286                  clk_id, freq, dir);
 287
 288         /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
 289            because the codec is slave. Of course limitations of the clock
 290            master (the IIS controller) apply.
 291            We'll error out on set_hw_params if it's not OK */
 292         if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
 293                 uda134x->sysclk = freq;
 294                 return 0;
 295         }
 296
 297         printk(KERN_ERR "%s unsupported sysclk\n", __func__);
 298         return -EINVAL;
 299 }
 300
 301 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 302                                unsigned int fmt)
 303 {
 304         struct snd_soc_codec *codec = codec_dai->codec;
 305         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 306
 307         pr_debug("%s fmt: %08X\n", __func__, fmt);
 308
 309         /* codec supports only full slave mode */
 310         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 311                 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
 312                 return -EINVAL;
 313         }
 314
 315         /* no support for clock inversion */
 316         if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
 317                 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
 318                 return -EINVAL;
 319         }
 320
 321         /* We can't setup DAI format here as it depends on the word bit num */
 322         /* so let's just store the value for later */
 323         uda134x->dai_fmt = fmt;
 324
 325         return 0;
 326 }
 327
 328 static int uda134x_set_bias_level(struct snd_soc_codec *codec,
 329                                   enum snd_soc_bias_level level)
 330 {
 331         u8 reg;
 332         struct uda134x_platform_data *pd = codec->control_data;
 333         int i;
 334         u8 *cache = codec->reg_cache;
 335
 336         pr_debug("%s bias level %d\n", __func__, level);
 337
 338         switch (level) {
 339         case SND_SOC_BIAS_ON:
 340                 /* ADC, DAC on */
 341                 switch (pd->model) {
 342                 case UDA134X_UDA1340:
 343                 case UDA134X_UDA1344:
 344                 case UDA134X_UDA1345:
 345                         reg = uda134x_read_reg_cache(codec, UDA134X_DATA011);
 346                         uda134x_write(codec, UDA134X_DATA011, reg | 0x03);
 347                         break;
 348                 case UDA134X_UDA1341:
 349                         reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
 350                         uda134x_write(codec, UDA134X_STATUS1, reg | 0x03);
 351                         break;
 352                 default:
 353                         printk(KERN_ERR "UDA134X SoC codec: "
 354                                "unsupported model %d\n", pd->model);
 355                         return -EINVAL;
 356                 }
 357                 break;
 358         case SND_SOC_BIAS_PREPARE:
 359                 /* power on */
 360                 if (pd->power) {
 361                         pd->power(1);
 362                         /* Sync reg_cache with the hardware */
 363                         for (i = 0; i < ARRAY_SIZE(uda134x_reg); i++)
 364                                 codec->driver->write(codec, i, *cache++);
 365                 }
 366                 break;
 367         case SND_SOC_BIAS_STANDBY:
 368                 /* ADC, DAC power off */
 369                 switch (pd->model) {
 370                 case UDA134X_UDA1340:
 371                 case UDA134X_UDA1344:
 372                 case UDA134X_UDA1345:
 373                         reg = uda134x_read_reg_cache(codec, UDA134X_DATA011);
 374                         uda134x_write(codec, UDA134X_DATA011, reg & ~(0x03));
 375                         break;
 376                 case UDA134X_UDA1341:
 377                         reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
 378                         uda134x_write(codec, UDA134X_STATUS1, reg & ~(0x03));
 379                         break;
 380                 default:
 381                         printk(KERN_ERR "UDA134X SoC codec: "
 382                                "unsupported model %d\n", pd->model);
 383                         return -EINVAL;
 384                 }
 385                 break;
 386         case SND_SOC_BIAS_OFF:
 387                 /* power off */
 388                 if (pd->power)
 389                         pd->power(0);
 390                 break;
 391         }
 392         codec->bias_level = level;
 393         return 0;
 394 }
 395
 396 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
 397                                             "Minimum2", "Maximum"};
 398 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 399 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
 400                                         "Analog2", "Both"};
 401
 402 static const struct soc_enum uda134x_mixer_enum[] = {
 403 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
 404 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
 405 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
 406 };
 407
 408 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
 409 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 410 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
 411 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
 412 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
 413
 414 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
 415 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
 416
 417 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 418 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 419
 420 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 421 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 422 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
 423
 424 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
 425 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
 426 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
 427
 428 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
 429 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
 430 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
 431 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
 432 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
 433 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 434 };
 435
 436 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
 437 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 438
 439 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 440 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 441
 442 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 443 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 444
 445 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 446 };
 447
 448 static const struct snd_kcontrol_new uda1345_snd_controls[] = {
 449 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 450
 451 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 452
 453 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 454 };
 455
 456 static struct snd_soc_dai_ops uda134x_dai_ops = {
 457         .startup        = uda134x_startup,
 458         .shutdown       = uda134x_shutdown,
 459         .hw_params      = uda134x_hw_params,
 460         .digital_mute   = uda134x_mute,
 461         .set_sysclk     = uda134x_set_dai_sysclk,
 462         .set_fmt        = uda134x_set_dai_fmt,
 463 };
 464
 465 static struct snd_soc_dai_driver uda134x_dai = {
 466         .name = "uda134x-hifi",
 467         /* playback capabilities */
 468         .playback = {
 469                 .stream_name = "Playback",
 470                 .channels_min = 1,
 471                 .channels_max = 2,
 472                 .rates = UDA134X_RATES,
 473                 .formats = UDA134X_FORMATS,
 474         },
 475         /* capture capabilities */
 476         .capture = {
 477                 .stream_name = "Capture",
 478                 .channels_min = 1,
 479                 .channels_max = 2,
 480                 .rates = UDA134X_RATES,
 481                 .formats = UDA134X_FORMATS,
 482         },
 483         /* pcm operations */
 484         .ops = &uda134x_dai_ops,
 485 };
 486
 487 static int uda134x_soc_probe(struct snd_soc_codec *codec)
 488 {
 489         struct uda134x_priv *uda134x;
 490         struct uda134x_platform_data *pd = dev_get_drvdata(codec->card->dev);
 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_controls(codec, uda1340_snd_controls,
 535                                         ARRAY_SIZE(uda1340_snd_controls));
 536         break;
 537         case UDA134X_UDA1341:
 538                 ret = snd_soc_add_controls(codec, uda1341_snd_controls,
 539                                         ARRAY_SIZE(uda1341_snd_controls));
 540         break;
 541         case UDA134X_UDA1345:
 542                 ret = snd_soc_add_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                                                 pm_message_t state)
 576 {
 577         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 578         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 579         return 0;
 580 }
 581
 582 static int uda134x_soc_resume(struct snd_soc_codec *codec)
 583 {
 584         uda134x_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 585         uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 586         return 0;
 587 }
 588 #else
 589 #define uda134x_soc_suspend NULL
 590 #define uda134x_soc_resume NULL
 591 #endif /* CONFIG_PM */
 592
 593 static struct snd_soc_codec_driver soc_codec_dev_uda134x = {
 594         .probe =        uda134x_soc_probe,
 595         .remove =       uda134x_soc_remove,
 596         .suspend =      uda134x_soc_suspend,
 597         .resume =       uda134x_soc_resume,
 598         .reg_cache_size = sizeof(uda134x_reg),
 599         .reg_word_size = sizeof(u8),
 600         .reg_cache_default = uda134x_reg,
 601         .reg_cache_step = 1,
 602         .read = uda134x_read_reg_cache,
 603         .write = uda134x_write,
 604 #ifdef POWER_OFF_ON_STANDBY
 605         .set_bias_level = uda134x_set_bias_level,
 606 #endif
 607 };
 608
 609 static int __devinit uda134x_codec_probe(struct platform_device *pdev)
 610 {
 611         return snd_soc_register_codec(&pdev->dev,
 612                         &soc_codec_dev_uda134x, &uda134x_dai, 1);
 613 }
 614
 615 static int __devexit uda134x_codec_remove(struct platform_device *pdev)
 616 {
 617         snd_soc_unregister_codec(&pdev->dev);
 618         return 0;
 619 }
 620
 621 static struct platform_driver uda134x_codec_driver = {
 622         .driver = {
 623                 .name = "uda134x-codec",
 624                 .owner = THIS_MODULE,
 625         },
 626         .probe = uda134x_codec_probe,
 627         .remove = __devexit_p(uda134x_codec_remove),
 628 };
 629
 630 static int __init uda134x_codec_init(void)
 631 {
 632         return platform_driver_register(&uda134x_codec_driver);
 633 }
 634 module_init(uda134x_codec_init);
 635
 636 static void __exit uda134x_codec_exit(void)
 637 {
 638         platform_driver_unregister(&uda134x_codec_driver);
 639 }
 640 module_exit(uda134x_codec_exit);
 641
 642 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
 643 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
 644 MODULE_LICENSE("GPL");