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_codec *codec = dai->codec;
 163         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 164         struct snd_pcm_runtime *master_runtime;
 165
 166         if (uda134x->master_substream) {
 167                 master_runtime = uda134x->master_substream->runtime;
 168
 169                 pr_debug("%s constraining to %d bits at %d\n", __func__,
 170                          master_runtime->sample_bits,
 171                          master_runtime->rate);
 172
 173                 snd_pcm_hw_constraint_minmax(substream->runtime,
 174                                              SNDRV_PCM_HW_PARAM_RATE,
 175                                              master_runtime->rate,
 176                                              master_runtime->rate);
 177
 178                 snd_pcm_hw_constraint_minmax(substream->runtime,
 179                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 180                                              master_runtime->sample_bits,
 181                                              master_runtime->sample_bits);
 182
 183                 uda134x->slave_substream = substream;
 184         } else
 185                 uda134x->master_substream = substream;
 186
 187         return 0;
 188 }
 189
 190 static void uda134x_shutdown(struct snd_pcm_substream *substream,
 191         struct snd_soc_dai *dai)
 192 {
 193         struct snd_soc_codec *codec = dai->codec;
 194         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 195
 196         if (uda134x->master_substream == substream)
 197                 uda134x->master_substream = uda134x->slave_substream;
 198
 199         uda134x->slave_substream = NULL;
 200 }
 201
 202 static int uda134x_hw_params(struct snd_pcm_substream *substream,
 203         struct snd_pcm_hw_params *params,
 204         struct snd_soc_dai *dai)
 205 {
 206         struct snd_soc_codec *codec = dai->codec;
 207         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 208         u8 hw_params;
 209
 210         if (substream == uda134x->slave_substream) {
 211                 pr_debug("%s ignoring hw_params for slave substream\n",
 212                          __func__);
 213                 return 0;
 214         }
 215
 216         hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
 217         hw_params &= STATUS0_SYSCLK_MASK;
 218         hw_params &= STATUS0_DAIFMT_MASK;
 219
 220         pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 221                  uda134x->sysclk, params_rate(params));
 222
 223         /* set SYSCLK / fs ratio */
 224         switch (uda134x->sysclk / params_rate(params)) {
 225         case 512:
 226                 break;
 227         case 384:
 228                 hw_params |= (1<<4);
 229                 break;
 230         case 256:
 231                 hw_params |= (1<<5);
 232                 break;
 233         default:
 234                 printk(KERN_ERR "%s unsupported fs\n", __func__);
 235                 return -EINVAL;
 236         }
 237
 238         pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
 239                  uda134x->dai_fmt, params_format(params));
 240
 241         /* set DAI format and word length */
 242         switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 243         case SND_SOC_DAIFMT_I2S:
 244                 break;
 245         case SND_SOC_DAIFMT_RIGHT_J:
 246                 switch (params_width(params)) {
 247                 case 16:
 248                         hw_params |= (1<<1);
 249                         break;
 250                 case 18:
 251                         hw_params |= (1<<2);
 252                         break;
 253                 case 20:
 254                         hw_params |= ((1<<2) | (1<<1));
 255                         break;
 256                 default:
 257                         printk(KERN_ERR "%s unsupported format (right)\n",
 258                                __func__);
 259                         return -EINVAL;
 260                 }
 261                 break;
 262         case SND_SOC_DAIFMT_LEFT_J:
 263                 hw_params |= (1<<3);
 264                 break;
 265         default:
 266                 printk(KERN_ERR "%s unsupported format\n", __func__);
 267                 return -EINVAL;
 268         }
 269
 270         uda134x_write(codec, UDA134X_STATUS0, hw_params);
 271
 272         return 0;
 273 }
 274
 275 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 276                                   int clk_id, unsigned int freq, int dir)
 277 {
 278         struct snd_soc_codec *codec = codec_dai->codec;
 279         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 280
 281         pr_debug("%s clk_id: %d, freq: %u, dir: %d\n", __func__,
 282                  clk_id, freq, dir);
 283
 284         /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
 285            because the codec is slave. Of course limitations of the clock
 286            master (the IIS controller) apply.
 287            We'll error out on set_hw_params if it's not OK */
 288         if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
 289                 uda134x->sysclk = freq;
 290                 return 0;
 291         }
 292
 293         printk(KERN_ERR "%s unsupported sysclk\n", __func__);
 294         return -EINVAL;
 295 }
 296
 297 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 298                                unsigned int fmt)
 299 {
 300         struct snd_soc_codec *codec = codec_dai->codec;
 301         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 302
 303         pr_debug("%s fmt: %08X\n", __func__, fmt);
 304
 305         /* codec supports only full slave mode */
 306         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 307                 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
 308                 return -EINVAL;
 309         }
 310
 311         /* no support for clock inversion */
 312         if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
 313                 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
 314                 return -EINVAL;
 315         }
 316
 317         /* We can't setup DAI format here as it depends on the word bit num */
 318         /* so let's just store the value for later */
 319         uda134x->dai_fmt = fmt;
 320
 321         return 0;
 322 }
 323
 324 static int uda134x_set_bias_level(struct snd_soc_codec *codec,
 325                                   enum snd_soc_bias_level level)
 326 {
 327         struct uda134x_platform_data *pd = codec->control_data;
 328         int i;
 329         u8 *cache = codec->reg_cache;
 330
 331         pr_debug("%s bias level %d\n", __func__, level);
 332
 333         switch (level) {
 334         case SND_SOC_BIAS_ON:
 335                 break;
 336         case SND_SOC_BIAS_PREPARE:
 337                 /* power on */
 338                 if (pd->power) {
 339                         pd->power(1);
 340                         /* Sync reg_cache with the hardware */
 341                         for (i = 0; i < ARRAY_SIZE(uda134x_reg); i++)
 342                                 codec->driver->write(codec, i, *cache++);
 343                 }
 344                 break;
 345         case SND_SOC_BIAS_STANDBY:
 346                 break;
 347         case SND_SOC_BIAS_OFF:
 348                 /* power off */
 349                 if (pd->power)
 350                         pd->power(0);
 351                 break;
 352         }
 353         codec->dapm.bias_level = level;
 354         return 0;
 355 }
 356
 357 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
 358                                             "Minimum2", "Maximum"};
 359 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 360 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
 361                                         "Analog2", "Both"};
 362
 363 static const struct soc_enum uda134x_mixer_enum[] = {
 364 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
 365 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
 366 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
 367 };
 368
 369 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
 370 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 371 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
 372 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
 373 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
 374
 375 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
 376 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
 377
 378 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 379 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 380
 381 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 382 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 383 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
 384
 385 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
 386 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
 387 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
 388
 389 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
 390 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
 391 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
 392 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
 393 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
 394 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 395 };
 396
 397 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
 398 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 399
 400 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 401 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 402
 403 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 404 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 405
 406 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 407 };
 408
 409 static const struct snd_kcontrol_new uda1345_snd_controls[] = {
 410 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 411
 412 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 413
 414 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 415 };
 416
 417 /* UDA1341 has the DAC/ADC power down in STATUS1 */
 418 static const struct snd_soc_dapm_widget uda1341_dapm_widgets[] = {
 419         SND_SOC_DAPM_DAC("DAC", "Playback", UDA134X_STATUS1, 0, 0),
 420         SND_SOC_DAPM_ADC("ADC", "Capture", UDA134X_STATUS1, 1, 0),
 421 };
 422
 423 /* UDA1340/4/5 has the DAC/ADC pwoer down in DATA0 11 */
 424 static const struct snd_soc_dapm_widget uda1340_dapm_widgets[] = {
 425         SND_SOC_DAPM_DAC("DAC", "Playback", UDA134X_DATA011, 0, 0),
 426         SND_SOC_DAPM_ADC("ADC", "Capture", UDA134X_DATA011, 1, 0),
 427 };
 428
 429 /* Common DAPM widgets */
 430 static const struct snd_soc_dapm_widget uda134x_dapm_widgets[] = {
 431         SND_SOC_DAPM_INPUT("VINL1"),
 432         SND_SOC_DAPM_INPUT("VINR1"),
 433         SND_SOC_DAPM_INPUT("VINL2"),
 434         SND_SOC_DAPM_INPUT("VINR2"),
 435         SND_SOC_DAPM_OUTPUT("VOUTL"),
 436         SND_SOC_DAPM_OUTPUT("VOUTR"),
 437 };
 438
 439 static const struct snd_soc_dapm_route uda134x_dapm_routes[] = {
 440         { "ADC", NULL, "VINL1" },
 441         { "ADC", NULL, "VINR1" },
 442         { "ADC", NULL, "VINL2" },
 443         { "ADC", NULL, "VINR2" },
 444         { "VOUTL", NULL, "DAC" },
 445         { "VOUTR", NULL, "DAC" },
 446 };
 447
 448 static const struct snd_soc_dai_ops uda134x_dai_ops = {
 449         .startup        = uda134x_startup,
 450         .shutdown       = uda134x_shutdown,
 451         .hw_params      = uda134x_hw_params,
 452         .digital_mute   = uda134x_mute,
 453         .set_sysclk     = uda134x_set_dai_sysclk,
 454         .set_fmt        = uda134x_set_dai_fmt,
 455 };
 456
 457 static struct snd_soc_dai_driver uda134x_dai = {
 458         .name = "uda134x-hifi",
 459         /* playback capabilities */
 460         .playback = {
 461                 .stream_name = "Playback",
 462                 .channels_min = 1,
 463                 .channels_max = 2,
 464                 .rates = UDA134X_RATES,
 465                 .formats = UDA134X_FORMATS,
 466         },
 467         /* capture capabilities */
 468         .capture = {
 469                 .stream_name = "Capture",
 470                 .channels_min = 1,
 471                 .channels_max = 2,
 472                 .rates = UDA134X_RATES,
 473                 .formats = UDA134X_FORMATS,
 474         },
 475         /* pcm operations */
 476         .ops = &uda134x_dai_ops,
 477 };
 478
 479 static int uda134x_soc_probe(struct snd_soc_codec *codec)
 480 {
 481         struct uda134x_priv *uda134x;
 482         struct uda134x_platform_data *pd = codec->component.card->dev->platform_data;
 483         const struct snd_soc_dapm_widget *widgets;
 484         unsigned num_widgets;
 485
 486         int ret;
 487
 488         printk(KERN_INFO "UDA134X SoC Audio Codec\n");
 489
 490         if (!pd) {
 491                 printk(KERN_ERR "UDA134X SoC codec: "
 492                        "missing L3 bitbang function\n");
 493                 return -ENODEV;
 494         }
 495
 496         switch (pd->model) {
 497         case UDA134X_UDA1340:
 498         case UDA134X_UDA1341:
 499         case UDA134X_UDA1344:
 500         case UDA134X_UDA1345:
 501                 break;
 502         default:
 503                 printk(KERN_ERR "UDA134X SoC codec: "
 504                        "unsupported model %d\n",
 505                         pd->model);
 506                 return -EINVAL;
 507         }
 508
 509         uda134x = kzalloc(sizeof(struct uda134x_priv), GFP_KERNEL);
 510         if (uda134x == NULL)
 511                 return -ENOMEM;
 512         snd_soc_codec_set_drvdata(codec, uda134x);
 513
 514         codec->control_data = pd;
 515
 516         if (pd->power)
 517                 pd->power(1);
 518
 519         uda134x_reset(codec);
 520
 521         if (pd->is_powered_on_standby)
 522                 uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 523         else
 524                 uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 525
 526         if (pd->model == UDA134X_UDA1341) {
 527                 widgets = uda1341_dapm_widgets;
 528                 num_widgets = ARRAY_SIZE(uda1341_dapm_widgets);
 529         } else {
 530                 widgets = uda1340_dapm_widgets;
 531                 num_widgets = ARRAY_SIZE(uda1340_dapm_widgets);
 532         }
 533
 534         ret = snd_soc_dapm_new_controls(&codec->dapm, widgets, num_widgets);
 535         if (ret) {
 536                 printk(KERN_ERR "%s failed to register dapm controls: %d",
 537                         __func__, ret);
 538                 kfree(uda134x);
 539                 return ret;
 540         }
 541
 542         switch (pd->model) {
 543         case UDA134X_UDA1340:
 544         case UDA134X_UDA1344:
 545                 ret = snd_soc_add_codec_controls(codec, uda1340_snd_controls,
 546                                         ARRAY_SIZE(uda1340_snd_controls));
 547         break;
 548         case UDA134X_UDA1341:
 549                 ret = snd_soc_add_codec_controls(codec, uda1341_snd_controls,
 550                                         ARRAY_SIZE(uda1341_snd_controls));
 551         break;
 552         case UDA134X_UDA1345:
 553                 ret = snd_soc_add_codec_controls(codec, uda1345_snd_controls,
 554                                         ARRAY_SIZE(uda1345_snd_controls));
 555         break;
 556         default:
 557                 printk(KERN_ERR "%s unknown codec type: %d",
 558                         __func__, pd->model);
 559                 kfree(uda134x);
 560                 return -EINVAL;
 561         }
 562
 563         if (ret < 0) {
 564                 printk(KERN_ERR "UDA134X: failed to register controls\n");
 565                 kfree(uda134x);
 566                 return ret;
 567         }
 568
 569         return 0;
 570 }
 571
 572 /* power down chip */
 573 static int uda134x_soc_remove(struct snd_soc_codec *codec)
 574 {
 575         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 576
 577         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 578         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 579
 580         kfree(uda134x);
 581         return 0;
 582 }
 583
 584 #if defined(CONFIG_PM)
 585 static int uda134x_soc_suspend(struct snd_soc_codec *codec)
 586 {
 587         uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 588         uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
 589         return 0;
 590 }
 591
 592 static int uda134x_soc_resume(struct snd_soc_codec *codec)
 593 {
 594         uda134x_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 595         uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
 596         return 0;
 597 }
 598 #else
 599 #define uda134x_soc_suspend NULL
 600 #define uda134x_soc_resume NULL
 601 #endif /* CONFIG_PM */
 602
 603 static struct snd_soc_codec_driver soc_codec_dev_uda134x = {
 604         .probe =        uda134x_soc_probe,
 605         .remove =       uda134x_soc_remove,
 606         .suspend =      uda134x_soc_suspend,
 607         .resume =       uda134x_soc_resume,
 608         .reg_cache_size = sizeof(uda134x_reg),
 609         .reg_word_size = sizeof(u8),
 610         .reg_cache_default = uda134x_reg,
 611         .reg_cache_step = 1,
 612         .read = uda134x_read_reg_cache,
 613         .write = uda134x_write,
 614         .set_bias_level = uda134x_set_bias_level,
 615         .dapm_widgets = uda134x_dapm_widgets,
 616         .num_dapm_widgets = ARRAY_SIZE(uda134x_dapm_widgets),
 617         .dapm_routes = uda134x_dapm_routes,
 618         .num_dapm_routes = ARRAY_SIZE(uda134x_dapm_routes),
 619 };
 620
 621 static int uda134x_codec_probe(struct platform_device *pdev)
 622 {
 623         return snd_soc_register_codec(&pdev->dev,
 624                         &soc_codec_dev_uda134x, &uda134x_dai, 1);
 625 }
 626
 627 static int uda134x_codec_remove(struct platform_device *pdev)
 628 {
 629         snd_soc_unregister_codec(&pdev->dev);
 630         return 0;
 631 }
 632
 633 static struct platform_driver uda134x_codec_driver = {
 634         .driver = {
 635                 .name = "uda134x-codec",
 636                 .owner = THIS_MODULE,
 637         },
 638         .probe = uda134x_codec_probe,
 639         .remove = uda134x_codec_remove,
 640 };
 641
 642 module_platform_driver(uda134x_codec_driver);
 643
 644 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
 645 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
 646 MODULE_LICENSE("GPL");