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         struct regmap *regmap;
  42         struct uda134x_platform_data *pd;
  43 };
  44
  45 static const struct reg_default uda134x_reg_defaults[] = {
  46         { UDA134X_EA000, 0x04 },
  47         { UDA134X_EA001, 0x04 },
  48         { UDA134X_EA010, 0x04 },
  49         { UDA134X_EA011, 0x00 },
  50         { UDA134X_EA100, 0x00 },
  51         { UDA134X_EA101, 0x00 },
  52         { UDA134X_EA110, 0x00 },
  53         { UDA134X_EA111, 0x00 },
  54         { UDA134X_STATUS0, 0x00 },
  55         { UDA134X_STATUS1, 0x03 },
  56         { UDA134X_DATA000, 0x00 },
  57         { UDA134X_DATA001, 0x00 },
  58         { UDA134X_DATA010, 0x00 },
  59         { UDA134X_DATA011, 0x00 },
  60         { UDA134X_DATA1, 0x00 },
  61 };
  62
  63 /*
  64  * Write to the uda134x registers
  65  *
  66  */
  67 static int uda134x_regmap_write(void *context, unsigned int reg,
  68         unsigned int value)
  69 {
  70         struct uda134x_platform_data *pd = context;
  71         int ret;
  72         u8 addr;
  73         u8 data = value;
  74
  75         switch (reg) {
  76         case UDA134X_STATUS0:
  77         case UDA134X_STATUS1:
  78                 addr = UDA134X_STATUS_ADDR;
  79                 data |= (reg - UDA134X_STATUS0) << 7;
  80                 break;
  81         case UDA134X_DATA000:
  82         case UDA134X_DATA001:
  83         case UDA134X_DATA010:
  84         case UDA134X_DATA011:
  85                 addr = UDA134X_DATA0_ADDR;
  86                 data |= (reg - UDA134X_DATA000) << 6;
  87                 break;
  88         case UDA134X_DATA1:
  89                 addr = UDA134X_DATA1_ADDR;
  90                 break;
  91         default:
  92                 /* It's an extended address register */
  93                 addr =  (reg | UDA134X_EXTADDR_PREFIX);
  94
  95                 ret = l3_write(&pd->l3,
  96                                UDA134X_DATA0_ADDR, &addr, 1);
  97                 if (ret != 1)
  98                         return -EIO;
  99
 100                 addr = UDA134X_DATA0_ADDR;
 101                 data = (value | UDA134X_EXTDATA_PREFIX);
 102                 break;
 103         }
 104
 105         ret = l3_write(&pd->l3,
 106                        addr, &data, 1);
 107         if (ret != 1)
 108                 return -EIO;
 109
 110         return 0;
 111 }
 112
 113 static inline void uda134x_reset(struct snd_soc_codec *codec)
 114 {
 115         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 116         unsigned int mask = 1<<6;
 117
 118         regmap_update_bits(uda134x->regmap, UDA134X_STATUS0, mask, mask);
 119         msleep(1);
 120         regmap_update_bits(uda134x->regmap, UDA134X_STATUS0, mask, 0);
 121 }
 122
 123 static int uda134x_mute(struct snd_soc_dai *dai, int mute)
 124 {
 125         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(dai->codec);
 126         unsigned int mask = 1<<2;
 127         unsigned int val;
 128
 129         pr_debug("%s mute: %d\n", __func__, mute);
 130
 131         if (mute)
 132                 val = mask;
 133         else
 134                 val = 0;
 135
 136         return regmap_update_bits(uda134x->regmap, UDA134X_DATA010, mask, val);
 137 }
 138
 139 static int uda134x_startup(struct snd_pcm_substream *substream,
 140         struct snd_soc_dai *dai)
 141 {
 142         struct snd_soc_codec *codec = dai->codec;
 143         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 144         struct snd_pcm_runtime *master_runtime;
 145
 146         if (uda134x->master_substream) {
 147                 master_runtime = uda134x->master_substream->runtime;
 148
 149                 pr_debug("%s constraining to %d bits at %d\n", __func__,
 150                          master_runtime->sample_bits,
 151                          master_runtime->rate);
 152
 153                 snd_pcm_hw_constraint_single(substream->runtime,
 154                                              SNDRV_PCM_HW_PARAM_RATE,
 155                                              master_runtime->rate);
 156
 157                 snd_pcm_hw_constraint_single(substream->runtime,
 158                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 159                                              master_runtime->sample_bits);
 160
 161                 uda134x->slave_substream = substream;
 162         } else
 163                 uda134x->master_substream = substream;
 164
 165         return 0;
 166 }
 167
 168 static void uda134x_shutdown(struct snd_pcm_substream *substream,
 169         struct snd_soc_dai *dai)
 170 {
 171         struct snd_soc_codec *codec = dai->codec;
 172         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 173
 174         if (uda134x->master_substream == substream)
 175                 uda134x->master_substream = uda134x->slave_substream;
 176
 177         uda134x->slave_substream = NULL;
 178 }
 179
 180 static int uda134x_hw_params(struct snd_pcm_substream *substream,
 181         struct snd_pcm_hw_params *params,
 182         struct snd_soc_dai *dai)
 183 {
 184         struct snd_soc_codec *codec = dai->codec;
 185         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 186         unsigned int hw_params = 0;
 187
 188         if (substream == uda134x->slave_substream) {
 189                 pr_debug("%s ignoring hw_params for slave substream\n",
 190                          __func__);
 191                 return 0;
 192         }
 193
 194         pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 195                  uda134x->sysclk, params_rate(params));
 196
 197         /* set SYSCLK / fs ratio */
 198         switch (uda134x->sysclk / params_rate(params)) {
 199         case 512:
 200                 break;
 201         case 384:
 202                 hw_params |= (1<<4);
 203                 break;
 204         case 256:
 205                 hw_params |= (1<<5);
 206                 break;
 207         default:
 208                 printk(KERN_ERR "%s unsupported fs\n", __func__);
 209                 return -EINVAL;
 210         }
 211
 212         pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
 213                  uda134x->dai_fmt, params_format(params));
 214
 215         /* set DAI format and word length */
 216         switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 217         case SND_SOC_DAIFMT_I2S:
 218                 break;
 219         case SND_SOC_DAIFMT_RIGHT_J:
 220                 switch (params_width(params)) {
 221                 case 16:
 222                         hw_params |= (1<<1);
 223                         break;
 224                 case 18:
 225                         hw_params |= (1<<2);
 226                         break;
 227                 case 20:
 228                         hw_params |= ((1<<2) | (1<<1));
 229                         break;
 230                 default:
 231                         printk(KERN_ERR "%s unsupported format (right)\n",
 232                                __func__);
 233                         return -EINVAL;
 234                 }
 235                 break;
 236         case SND_SOC_DAIFMT_LEFT_J:
 237                 hw_params |= (1<<3);
 238                 break;
 239         default:
 240                 printk(KERN_ERR "%s unsupported format\n", __func__);
 241                 return -EINVAL;
 242         }
 243
 244         return regmap_update_bits(uda134x->regmap, UDA134X_STATUS0,
 245                 STATUS0_SYSCLK_MASK | STATUS0_DAIFMT_MASK, hw_params);
 246 }
 247
 248 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 249                                   int clk_id, unsigned int freq, int dir)
 250 {
 251         struct snd_soc_codec *codec = codec_dai->codec;
 252         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 253
 254         pr_debug("%s clk_id: %d, freq: %u, dir: %d\n", __func__,
 255                  clk_id, freq, dir);
 256
 257         /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
 258            because the codec is slave. Of course limitations of the clock
 259            master (the IIS controller) apply.
 260            We'll error out on set_hw_params if it's not OK */
 261         if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
 262                 uda134x->sysclk = freq;
 263                 return 0;
 264         }
 265
 266         printk(KERN_ERR "%s unsupported sysclk\n", __func__);
 267         return -EINVAL;
 268 }
 269
 270 static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 271                                unsigned int fmt)
 272 {
 273         struct snd_soc_codec *codec = codec_dai->codec;
 274         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 275
 276         pr_debug("%s fmt: %08X\n", __func__, fmt);
 277
 278         /* codec supports only full slave mode */
 279         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 280                 printk(KERN_ERR "%s unsupported slave mode\n", __func__);
 281                 return -EINVAL;
 282         }
 283
 284         /* no support for clock inversion */
 285         if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
 286                 printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
 287                 return -EINVAL;
 288         }
 289
 290         /* We can't setup DAI format here as it depends on the word bit num */
 291         /* so let's just store the value for later */
 292         uda134x->dai_fmt = fmt;
 293
 294         return 0;
 295 }
 296
 297 static int uda134x_set_bias_level(struct snd_soc_codec *codec,
 298                                   enum snd_soc_bias_level level)
 299 {
 300         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 301         struct uda134x_platform_data *pd = uda134x->pd;
 302         pr_debug("%s bias level %d\n", __func__, level);
 303
 304         switch (level) {
 305         case SND_SOC_BIAS_ON:
 306                 break;
 307         case SND_SOC_BIAS_PREPARE:
 308                 /* power on */
 309                 if (pd->power) {
 310                         pd->power(1);
 311                         regcache_sync(uda134x->regmap);
 312                 }
 313                 break;
 314         case SND_SOC_BIAS_STANDBY:
 315                 break;
 316         case SND_SOC_BIAS_OFF:
 317                 /* power off */
 318                 if (pd->power) {
 319                         pd->power(0);
 320                         regcache_mark_dirty(uda134x->regmap);
 321                 }
 322                 break;
 323         }
 324         return 0;
 325 }
 326
 327 static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
 328                                             "Minimum2", "Maximum"};
 329 static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 330 static const char *uda134x_mixmode[] = {"Differential", "Analog1",
 331                                         "Analog2", "Both"};
 332
 333 static const struct soc_enum uda134x_mixer_enum[] = {
 334 SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
 335 SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
 336 SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
 337 };
 338
 339 static const struct snd_kcontrol_new uda1341_snd_controls[] = {
 340 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 341 SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
 342 SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
 343 SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
 344
 345 SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
 346 SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
 347
 348 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 349 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 350
 351 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 352 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 353 SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
 354
 355 SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
 356 SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
 357 SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
 358
 359 SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
 360 SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
 361 SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
 362 SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
 363 SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
 364 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 365 };
 366
 367 static const struct snd_kcontrol_new uda1340_snd_controls[] = {
 368 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 369
 370 SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
 371 SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
 372
 373 SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
 374 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 375
 376 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 377 };
 378
 379 static const struct snd_kcontrol_new uda1345_snd_controls[] = {
 380 SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
 381
 382 SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
 383
 384 SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
 385 };
 386
 387 /* UDA1341 has the DAC/ADC power down in STATUS1 */
 388 static const struct snd_soc_dapm_widget uda1341_dapm_widgets[] = {
 389         SND_SOC_DAPM_DAC("DAC", "Playback", UDA134X_STATUS1, 0, 0),
 390         SND_SOC_DAPM_ADC("ADC", "Capture", UDA134X_STATUS1, 1, 0),
 391 };
 392
 393 /* UDA1340/4/5 has the DAC/ADC pwoer down in DATA0 11 */
 394 static const struct snd_soc_dapm_widget uda1340_dapm_widgets[] = {
 395         SND_SOC_DAPM_DAC("DAC", "Playback", UDA134X_DATA011, 0, 0),
 396         SND_SOC_DAPM_ADC("ADC", "Capture", UDA134X_DATA011, 1, 0),
 397 };
 398
 399 /* Common DAPM widgets */
 400 static const struct snd_soc_dapm_widget uda134x_dapm_widgets[] = {
 401         SND_SOC_DAPM_INPUT("VINL1"),
 402         SND_SOC_DAPM_INPUT("VINR1"),
 403         SND_SOC_DAPM_INPUT("VINL2"),
 404         SND_SOC_DAPM_INPUT("VINR2"),
 405         SND_SOC_DAPM_OUTPUT("VOUTL"),
 406         SND_SOC_DAPM_OUTPUT("VOUTR"),
 407 };
 408
 409 static const struct snd_soc_dapm_route uda134x_dapm_routes[] = {
 410         { "ADC", NULL, "VINL1" },
 411         { "ADC", NULL, "VINR1" },
 412         { "ADC", NULL, "VINL2" },
 413         { "ADC", NULL, "VINR2" },
 414         { "VOUTL", NULL, "DAC" },
 415         { "VOUTR", NULL, "DAC" },
 416 };
 417
 418 static const struct snd_soc_dai_ops uda134x_dai_ops = {
 419         .startup        = uda134x_startup,
 420         .shutdown       = uda134x_shutdown,
 421         .hw_params      = uda134x_hw_params,
 422         .digital_mute   = uda134x_mute,
 423         .set_sysclk     = uda134x_set_dai_sysclk,
 424         .set_fmt        = uda134x_set_dai_fmt,
 425 };
 426
 427 static struct snd_soc_dai_driver uda134x_dai = {
 428         .name = "uda134x-hifi",
 429         /* playback capabilities */
 430         .playback = {
 431                 .stream_name = "Playback",
 432                 .channels_min = 1,
 433                 .channels_max = 2,
 434                 .rates = UDA134X_RATES,
 435                 .formats = UDA134X_FORMATS,
 436         },
 437         /* capture capabilities */
 438         .capture = {
 439                 .stream_name = "Capture",
 440                 .channels_min = 1,
 441                 .channels_max = 2,
 442                 .rates = UDA134X_RATES,
 443                 .formats = UDA134X_FORMATS,
 444         },
 445         /* pcm operations */
 446         .ops = &uda134x_dai_ops,
 447 };
 448
 449 static int uda134x_soc_probe(struct snd_soc_codec *codec)
 450 {
 451         struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
 452         struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
 453         struct uda134x_platform_data *pd = uda134x->pd;
 454         const struct snd_soc_dapm_widget *widgets;
 455         unsigned num_widgets;
 456         int ret;
 457
 458         printk(KERN_INFO "UDA134X SoC Audio Codec\n");
 459
 460         switch (pd->model) {
 461         case UDA134X_UDA1340:
 462         case UDA134X_UDA1341:
 463         case UDA134X_UDA1344:
 464         case UDA134X_UDA1345:
 465                 break;
 466         default:
 467                 printk(KERN_ERR "UDA134X SoC codec: "
 468                        "unsupported model %d\n",
 469                         pd->model);
 470                 return -EINVAL;
 471         }
 472
 473         if (pd->power)
 474                 pd->power(1);
 475
 476         uda134x_reset(codec);
 477
 478         if (pd->model == UDA134X_UDA1341) {
 479                 widgets = uda1341_dapm_widgets;
 480                 num_widgets = ARRAY_SIZE(uda1341_dapm_widgets);
 481         } else {
 482                 widgets = uda1340_dapm_widgets;
 483                 num_widgets = ARRAY_SIZE(uda1340_dapm_widgets);
 484         }
 485
 486         ret = snd_soc_dapm_new_controls(dapm, widgets, num_widgets);
 487         if (ret) {
 488                 printk(KERN_ERR "%s failed to register dapm controls: %d",
 489                         __func__, ret);
 490                 return ret;
 491         }
 492
 493         switch (pd->model) {
 494         case UDA134X_UDA1340:
 495         case UDA134X_UDA1344:
 496                 ret = snd_soc_add_codec_controls(codec, uda1340_snd_controls,
 497                                         ARRAY_SIZE(uda1340_snd_controls));
 498         break;
 499         case UDA134X_UDA1341:
 500                 ret = snd_soc_add_codec_controls(codec, uda1341_snd_controls,
 501                                         ARRAY_SIZE(uda1341_snd_controls));
 502         break;
 503         case UDA134X_UDA1345:
 504                 ret = snd_soc_add_codec_controls(codec, uda1345_snd_controls,
 505                                         ARRAY_SIZE(uda1345_snd_controls));
 506         break;
 507         default:
 508                 printk(KERN_ERR "%s unknown codec type: %d",
 509                         __func__, pd->model);
 510                 return -EINVAL;
 511         }
 512
 513         if (ret < 0) {
 514                 printk(KERN_ERR "UDA134X: failed to register controls\n");
 515                 return ret;
 516         }
 517
 518         return 0;
 519 }
 520
 521 static const struct snd_soc_codec_driver soc_codec_dev_uda134x = {
 522         .probe =        uda134x_soc_probe,
 523         .set_bias_level = uda134x_set_bias_level,
 524         .suspend_bias_off = true,
 525
 526         .component_driver = {
 527                 .dapm_widgets           = uda134x_dapm_widgets,
 528                 .num_dapm_widgets       = ARRAY_SIZE(uda134x_dapm_widgets),
 529                 .dapm_routes            = uda134x_dapm_routes,
 530                 .num_dapm_routes        = ARRAY_SIZE(uda134x_dapm_routes),
 531         },
 532 };
 533
 534 static const struct regmap_config uda134x_regmap_config = {
 535         .reg_bits = 8,
 536         .val_bits = 8,
 537         .max_register = UDA134X_DATA1,
 538         .reg_defaults = uda134x_reg_defaults,
 539         .num_reg_defaults = ARRAY_SIZE(uda134x_reg_defaults),
 540         .cache_type = REGCACHE_RBTREE,
 541
 542         .reg_write = uda134x_regmap_write,
 543 };
 544
 545 static int uda134x_codec_probe(struct platform_device *pdev)
 546 {
 547         struct uda134x_platform_data *pd = pdev->dev.platform_data;
 548         struct uda134x_priv *uda134x;
 549         int ret;
 550
 551         if (!pd) {
 552                 dev_err(&pdev->dev, "Missing L3 bitbang function\n");
 553                 return -ENODEV;
 554         }
 555
 556         uda134x = devm_kzalloc(&pdev->dev, sizeof(*uda134x), GFP_KERNEL);
 557         if (!uda134x)
 558                 return -ENOMEM;
 559
 560         uda134x->pd = pd;
 561         platform_set_drvdata(pdev, uda134x);
 562
 563         if (pd->l3.use_gpios) {
 564                 ret = l3_set_gpio_ops(&pdev->dev, &uda134x->pd->l3);
 565                 if (ret < 0)
 566                         return ret;
 567         }
 568
 569         uda134x->regmap = devm_regmap_init(&pdev->dev, NULL, pd,
 570                 &uda134x_regmap_config);
 571         if (IS_ERR(uda134x->regmap))
 572                 return PTR_ERR(uda134x->regmap);
 573
 574         return snd_soc_register_codec(&pdev->dev,
 575                         &soc_codec_dev_uda134x, &uda134x_dai, 1);
 576 }
 577
 578 static int uda134x_codec_remove(struct platform_device *pdev)
 579 {
 580         snd_soc_unregister_codec(&pdev->dev);
 581         return 0;
 582 }
 583
 584 static struct platform_driver uda134x_codec_driver = {
 585         .driver = {
 586                 .name = "uda134x-codec",
 587         },
 588         .probe = uda134x_codec_probe,
 589         .remove = uda134x_codec_remove,
 590 };
 591
 592 module_platform_driver(uda134x_codec_driver);
 593
 594 MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
 595 MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
 596 MODULE_LICENSE("GPL");