Pileus Git - ~andy/linux/blob - 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, 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                 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_device *socdev = rtd->socdev;
 164         struct snd_soc_codec *codec = socdev->card->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_device *socdev = rtd->socdev;
 197         struct snd_soc_codec *codec = socdev->card->codec;
 198         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 199
 200         if (uda134x->master_substream == substream)
 201                 uda134x->master_substream = uda134x->slave_substream;
 202
 203         uda134x->slave_substream = NULL;
 204 }
 205
 206 static int uda134x_hw_params(struct snd_pcm_substream *substream,
 207         struct snd_pcm_hw_params *params,
 208         struct snd_soc_dai *dai)
 209 {
 210         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 211         struct snd_soc_device *socdev = rtd->socdev;
 212         struct snd_soc_codec *codec = socdev->card->codec;
 213         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 214         u8 hw_params;
 215
 216         if (substream == uda134x->slave_substream) {
 217                 pr_debug("%s ignoring hw_params for slave substream\n",
 218                          __func__);
 219                 return 0;
 220         }
 221
 222         hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
 223         hw_params &= STATUS0_SYSCLK_MASK;
 224         hw_params &= STATUS0_DAIFMT_MASK;
 225
 226         pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 227                  uda134x->sysclk, params_rate(params));
 228
 229         /* set SYSCLK / fs ratio */
 230         switch (uda134x->sysclk / params_rate(params)) {
 231         case 512:
 232                 break;
 233         case 384:
 234                 hw_params |= (1<<4);
 235                 break;
 236         case 256:
 237                 hw_params |= (1<<5);
 238                 break;
 239         default:
 240                 printk(KERN_ERR "%s unsupported fs\n", __func__);
 241                 return -EINVAL;
 242         }
 243
 244         pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
 245                  uda134x->dai_fmt, params_format(params));
 246
 247         /* set DAI format and word length */
 248         switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 249         case SND_SOC_DAIFMT_I2S:
 250                 break;
 251         case SND_SOC_DAIFMT_RIGHT_J:
 252                 switch (params_format(params)) {
 253                 case SNDRV_PCM_FORMAT_S16_LE:
 254                         hw_params |= (1<<1);
 255                         break;
 256                 case SNDRV_PCM_FORMAT_S18_3LE:
 257                         hw_params |= (1<<2);
 258                         break;
 259                 case SNDRV_PCM_FORMAT_S20_3LE:
 260                         hw_params |= ((1<<2) | (1<<1));
 261                         break;
 262                 default:
 263                         printk(KERN_ERR "%s unsupported format (right)\n",
 264                                __func__);
 265                         return -EINVAL;
 266                 }
 267                 break;
 268         case SND_SOC_DAIFMT_LEFT_J:
 269                 hw_params |= (1<<3);
 270                 break;
 271         default:
 272                 printk(KERN_ERR "%s unsupported format\n", __func__);
 273                 return -EINVAL;
 274         }
 275
 276         uda134x_write(codec, UDA134X_STATUS0, hw_params);
 277
 278         return 0;
 279 }
 280
 281 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 282                                   int clk_id, unsigned int freq, int dir)
 283 {
 284         struct snd_soc_codec *codec = codec_dai->codec;
 285         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 286
 287         pr_debug("%s clk_id: %d, freq: %u, dir: %d\n", __func__,
 288                  clk_id, freq, dir);
 289
 290         /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
 291            because the codec is slave. Of course limitations of the clock
 292            master (the IIS controller) apply.
 293            We'll error out on set_hw_params if it's not OK */
 294         if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
 295                 uda134x->sysclk = freq;
 296                 return 0;
 297         }
 298
 299         printk(KERN_ERR "%s unsupported sysclk\n", __func__);
 300         return -EINVAL;
 301 }
 302
 303 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 304                                unsigned int fmt)
 305 {
 306         struct snd_soc_codec *codec = codec_dai->codec;
 307         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 308
 309         pr_debug("%s fmt: %08X\n", __func__, fmt);
 310
 311         /* codec supports only full slave mode */
 312         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 313                 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
 314                 return -EINVAL;
 315         }
 316
 317         /* no support for clock inversion */
 318         if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
 319                 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
 320                 return -EINVAL;
 321         }
 322
 323         /* We can't setup DAI format here as it depends on the word bit num */
 324         /* so let's just store the value for later */
 325         uda134x->dai_fmt = fmt;
 326
 327         return 0;
 328 }
 329
 330 static int uda134x_set_bias_level(struct snd_soc_codec *codec,
 331                                   enum snd_soc_bias_level level)
 332 {
 333         u8 reg;
 334         struct uda134x_platform_data *pd = codec->control_data;
 335         int i;
 336         u8 *cache = codec->reg_cache;
 337
 338         pr_debug("%s bias level %d\n", __func__, level);
 339
 340         switch (level) {
 341         case SND_SOC_BIAS_ON:
 342                 /* ADC, DAC on */
 343                 reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
 344                 uda134x_write(codec, UDA134X_STATUS1, reg | 0x03);
 345                 break;
 346         case SND_SOC_BIAS_PREPARE:
 347                 /* power on */
 348                 if (pd->power) {
 349                         pd->power(1);
 350                         /* Sync reg_cache with the hardware */
 351                         for (i = 0; i < ARRAY_SIZE(uda134x_reg); i++)
 352                                 codec->write(codec, i, *cache++);
 353                 }
 354                 break;
 355         case SND_SOC_BIAS_STANDBY:
 356                 /* ADC, DAC power off */
 357                 reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
 358                 uda134x_write(codec, UDA134X_STATUS1, reg & ~(0x03));
 359                 break;
 360         case SND_SOC_BIAS_OFF:
 361                 /* power off */
 362                 if (pd->power)
 363                         pd->power(0);
 364                 break;
 365         }
 366         codec->bias_level = level;
 367         return 0;
 368 }
 369
 370 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
 371                                             "Minimum2", "Maximum"};
 372 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 373 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
 374                                         "Analog2", "Both"};
 375
 376 static const struct soc_enum uda134x_mixer_enum[] = {
 377 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
 378 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
 379 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
 380 };
 381
 382 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
 383 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 384 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
 385 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
 386 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
 387
 388 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
 389 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
 390
 391 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 392 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 393
 394 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 395 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 396 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
 397
 398 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
 399 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
 400 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
 401
 402 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
 403 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
 404 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
 405 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
 406 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
 407 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 408 };
 409
 410 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
 411 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 412
 413 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 414 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 415
 416 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 417 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 418
 419 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 420 };
 421
 422 static const struct snd_kcontrol_new uda1345_snd_controls[] = {
 423 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 424
 425 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 426
 427 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 428 };
 429
 430 static struct snd_soc_dai_ops uda134x_dai_ops = {
 431         .startup        = uda134x_startup,
 432         .shutdown       = uda134x_shutdown,
 433         .hw_params      = uda134x_hw_params,
 434         .digital_mute   = uda134x_mute,
 435         .set_sysclk     = uda134x_set_dai_sysclk,
 436         .set_fmt        = uda134x_set_dai_fmt,
 437 };
 438
 439 struct snd_soc_dai uda134x_dai = {
 440         .name = "UDA134X",
 441         /* playback capabilities */
 442         .playback = {
 443                 .stream_name = "Playback",
 444                 .channels_min = 1,
 445                 .channels_max = 2,
 446                 .rates = UDA134X_RATES,
 447                 .formats = UDA134X_FORMATS,
 448         },
 449         /* capture capabilities */
 450         .capture = {
 451                 .stream_name = "Capture",
 452                 .channels_min = 1,
 453                 .channels_max = 2,
 454                 .rates = UDA134X_RATES,
 455                 .formats = UDA134X_FORMATS,
 456         },
 457         /* pcm operations */
 458         .ops = &uda134x_dai_ops,
 459 };
 460 EXPORT_SYMBOL(uda134x_dai);
 461
 462
 463 static int uda134x_soc_probe(struct platform_device *pdev)
 464 {
 465         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 466         struct snd_soc_codec *codec;
 467         struct uda134x_priv *uda134x;
 468         void *codec_setup_data = socdev->codec_data;
 469         int ret = -ENOMEM;
 470         struct uda134x_platform_data *pd;
 471
 472         printk(KERN_INFO "UDA134X SoC Audio Codec\n");
 473
 474         if (!codec_setup_data) {
 475                 printk(KERN_ERR "UDA134X SoC codec: "
 476                        "missing L3 bitbang function\n");
 477                 return -ENODEV;
 478         }
 479
 480         pd = codec_setup_data;
 481         switch (pd->model) {
 482         case UDA134X_UDA1340:
 483         case UDA134X_UDA1341:
 484         case UDA134X_UDA1344:
 485         case UDA134X_UDA1345:
 486                 break;
 487         default:
 488                 printk(KERN_ERR "UDA134X SoC codec: "
 489                        "unsupported model %d\n",
 490                         pd->model);
 491                 return -EINVAL;
 492         }
 493
 494         socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 495         if (socdev->card->codec == NULL)
 496                 return ret;
 497
 498         codec = socdev->card->codec;
 499
 500         uda134x = kzalloc(sizeof(struct uda134x_priv), GFP_KERNEL);
 501         if (uda134x == NULL)
 502                 goto priv_err;
 503         snd_soc_codec_set_drvdata(codec, uda134x);
 504
 505         codec->reg_cache = kmemdup(uda134x_reg, sizeof(uda134x_reg),
 506                                    GFP_KERNEL);
 507         if (codec->reg_cache == NULL)
 508                 goto reg_err;
 509
 510         mutex_init(&codec->mutex);
 511
 512         codec->reg_cache_size = sizeof(uda134x_reg);
 513         codec->reg_cache_step = 1;
 514
 515         codec->name = "UDA134X";
 516         codec->owner = THIS_MODULE;
 517         codec->dai = &uda134x_dai;
 518         codec->num_dai = 1;
 519         codec->read = uda134x_read_reg_cache;
 520         codec->write = uda134x_write;
 521
 522         INIT_LIST_HEAD(&codec->dapm_widgets);
 523         INIT_LIST_HEAD(&codec->dapm_paths);
 524
 525         codec->control_data = codec_setup_data;
 526
 527         if (pd->power)
 528                 pd->power(1);
 529
 530         uda134x_reset(codec);
 531
 532         if (pd->is_powered_on_standby) {
 533                 codec->set_bias_level = NULL;
 534                 uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 535         } else {
 536                 codec->set_bias_level = uda134x_set_bias_level;
 537                 uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 538         }
 539
 540         /* register pcms */
 541         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 542         if (ret < 0) {
 543                 printk(KERN_ERR "UDA134X: failed to register pcms\n");
 544                 goto pcm_err;
 545         }
 546
 547         switch (pd->model) {
 548         case UDA134X_UDA1340:
 549         case UDA134X_UDA1344:
 550                 ret = snd_soc_add_controls(codec, uda1340_snd_controls,
 551                                         ARRAY_SIZE(uda1340_snd_controls));
 552         break;
 553         case UDA134X_UDA1341:
 554                 ret = snd_soc_add_controls(codec, uda1341_snd_controls,
 555                                         ARRAY_SIZE(uda1341_snd_controls));
 556         break;
 557         case UDA134X_UDA1345:
 558                 ret = snd_soc_add_controls(codec, uda1345_snd_controls,
 559                                         ARRAY_SIZE(uda1345_snd_controls));
 560         break;
 561         default:
 562                 printk(KERN_ERR "%s unknown codec type: %d",
 563                         __func__, pd->model);
 564         return -EINVAL;
 565         }
 566
 567         if (ret < 0) {
 568                 printk(KERN_ERR "UDA134X: failed to register controls\n");
 569                 goto pcm_err;
 570         }
 571
 572         return 0;
 573
 574 pcm_err:
 575         kfree(codec->reg_cache);
 576 reg_err:
 577         kfree(snd_soc_codec_get_drvdata(codec));
 578 priv_err:
 579         kfree(codec);
 580         return ret;
 581 }
 582
 583 /* power down chip */
 584 static int uda134x_soc_remove(struct platform_device *pdev)
 585 {
 586         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 587         struct snd_soc_codec *codec = socdev->card->codec;
 588
 589         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 590         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 591
 592         snd_soc_free_pcms(socdev);
 593         snd_soc_dapm_free(socdev);
 594
 595         kfree(snd_soc_codec_get_drvdata(codec));
 596         kfree(codec->reg_cache);
 597         kfree(codec);
 598
 599         return 0;
 600 }
 601
 602 #if defined(CONFIG_PM)
 603 static int uda134x_soc_suspend(struct platform_device *pdev,
 604                                                 pm_message_t state)
 605 {
 606         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 607         struct snd_soc_codec *codec = socdev->card->codec;
 608
 609         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 610         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 611         return 0;
 612 }
 613
 614 static int uda134x_soc_resume(struct platform_device *pdev)
 615 {
 616         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 617         struct snd_soc_codec *codec = socdev->card->codec;
 618
 619         uda134x_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 620         uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 621         return 0;
 622 }
 623 #else
 624 #define uda134x_soc_suspend NULL
 625 #define uda134x_soc_resume NULL
 626 #endif /* CONFIG_PM */
 627
 628 struct snd_soc_codec_device soc_codec_dev_uda134x = {
 629         .probe =        uda134x_soc_probe,
 630         .remove =       uda134x_soc_remove,
 631         .suspend =      uda134x_soc_suspend,
 632         .resume =       uda134x_soc_resume,
 633 };
 634 EXPORT_SYMBOL_GPL(soc_codec_dev_uda134x);
 635
 636 static int __init uda134x_init(void)
 637 {
 638         return snd_soc_register_dai(&uda134x_dai);
 639 }
 640 module_init(uda134x_init);
 641
 642 static void __exit uda134x_exit(void)
 643 {
 644         snd_soc_unregister_dai(&uda134x_dai);
 645 }
 646 module_exit(uda134x_exit);
 647
 648 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
 649 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
 650 MODULE_LICENSE("GPL");