sound/soc/codecs/ad193x.c

   1 /*
   2  * AD193X Audio Codec driver supporting AD1936/7/8/9
   3  *
   4  * Copyright 2010 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/device.h>
  13 #include <linux/i2c.h>
  14 #include <linux/spi/spi.h>
  15 #include <linux/slab.h>
  16 #include <sound/core.h>
  17 #include <sound/pcm.h>
  18 #include <sound/pcm_params.h>
  19 #include <sound/initval.h>
  20 #include <sound/soc.h>
  21 #include <sound/tlv.h>
  22 #include "ad193x.h"
  23
  24 /* codec private data */
  25 struct ad193x_priv {
  26         struct regmap *regmap;
  27         int sysclk;
  28 };
  29
  30 /*
  31  * AD193X volume/mute/de-emphasis etc. controls
  32  */
  33 static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
  34
  35 static const struct soc_enum ad193x_deemp_enum =
  36         SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);
  37
  38 static const struct snd_kcontrol_new ad193x_snd_controls[] = {
  39         /* DAC volume control */
  40         SOC_DOUBLE_R("DAC1 Volume", AD193X_DAC_L1_VOL,
  41                         AD193X_DAC_R1_VOL, 0, 0xFF, 1),
  42         SOC_DOUBLE_R("DAC2 Volume", AD193X_DAC_L2_VOL,
  43                         AD193X_DAC_R2_VOL, 0, 0xFF, 1),
  44         SOC_DOUBLE_R("DAC3 Volume", AD193X_DAC_L3_VOL,
  45                         AD193X_DAC_R3_VOL, 0, 0xFF, 1),
  46         SOC_DOUBLE_R("DAC4 Volume", AD193X_DAC_L4_VOL,
  47                         AD193X_DAC_R4_VOL, 0, 0xFF, 1),
  48
  49         /* ADC switch control */
  50         SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
  51                 AD193X_ADCR1_MUTE, 1, 1),
  52         SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
  53                 AD193X_ADCR2_MUTE, 1, 1),
  54
  55         /* DAC switch control */
  56         SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
  57                 AD193X_DACR1_MUTE, 1, 1),
  58         SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
  59                 AD193X_DACR2_MUTE, 1, 1),
  60         SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
  61                 AD193X_DACR3_MUTE, 1, 1),
  62         SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
  63                 AD193X_DACR4_MUTE, 1, 1),
  64
  65         /* ADC high-pass filter */
  66         SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
  67                         AD193X_ADC_HIGHPASS_FILTER, 1, 0),
  68
  69         /* DAC de-emphasis */
  70         SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
  71 };
  72
  73 static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
  74         SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
  75         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
  76         SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
  77         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
  78         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  79         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  80         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  81         SND_SOC_DAPM_OUTPUT("DAC4OUT"),
  82         SND_SOC_DAPM_INPUT("ADC1IN"),
  83         SND_SOC_DAPM_INPUT("ADC2IN"),
  84 };
  85
  86 static const struct snd_soc_dapm_route audio_paths[] = {
  87         { "DAC", NULL, "PLL_PWR" },
  88         { "ADC", NULL, "PLL_PWR" },
  89         { "DAC", NULL, "ADC_PWR" },
  90         { "ADC", NULL, "ADC_PWR" },
  91         { "DAC1OUT", "DAC1 Switch", "DAC" },
  92         { "DAC2OUT", "DAC2 Switch", "DAC" },
  93         { "DAC3OUT", "DAC3 Switch", "DAC" },
  94         { "DAC4OUT", "DAC4 Switch", "DAC" },
  95         { "ADC", "ADC1 Switch", "ADC1IN" },
  96         { "ADC", "ADC2 Switch", "ADC2IN" },
  97 };
  98
  99 /*
 100  * DAI ops entries
 101  */
 102
 103 static int ad193x_mute(struct snd_soc_dai *dai, int mute)
 104 {
 105         struct snd_soc_codec *codec = dai->codec;
 106         int reg;
 107
 108         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 109         reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
 110                 (~AD193X_DAC_MASTER_MUTE);
 111         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 112
 113         return 0;
 114 }
 115
 116 static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 117                                unsigned int rx_mask, int slots, int width)
 118 {
 119         struct snd_soc_codec *codec = dai->codec;
 120         int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 121         int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
 122
 123         dac_reg &= ~AD193X_DAC_CHAN_MASK;
 124         adc_reg &= ~AD193X_ADC_CHAN_MASK;
 125
 126         switch (slots) {
 127         case 2:
 128                 dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
 129                 adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
 130                 break;
 131         case 4:
 132                 dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
 133                 adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
 134                 break;
 135         case 8:
 136                 dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
 137                 adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
 138                 break;
 139         case 16:
 140                 dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
 141                 adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
 142                 break;
 143         default:
 144                 return -EINVAL;
 145         }
 146
 147         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 148         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
 149
 150         return 0;
 151 }
 152
 153 static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 154                 unsigned int fmt)
 155 {
 156         struct snd_soc_codec *codec = codec_dai->codec;
 157         int adc_reg1, adc_reg2, dac_reg;
 158
 159         adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
 160         adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
 161         dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 162
 163         /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
 164          * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
 165          */
 166         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 167         case SND_SOC_DAIFMT_I2S:
 168                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 169                 adc_reg1 |= AD193X_ADC_SERFMT_TDM;
 170                 break;
 171         case SND_SOC_DAIFMT_DSP_A:
 172                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 173                 adc_reg1 |= AD193X_ADC_SERFMT_AUX;
 174                 break;
 175         default:
 176                 return -EINVAL;
 177         }
 178
 179         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 180         case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
 181                 adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 182                 adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 183                 dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 184                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 185                 break;
 186         case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
 187                 adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 188                 adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 189                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 190                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 191                 break;
 192         case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
 193                 adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 194                 adc_reg2 |= AD193X_ADC_BCLK_INV;
 195                 dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 196                 dac_reg |= AD193X_DAC_BCLK_INV;
 197                 break;
 198
 199         case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
 200                 adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 201                 adc_reg2 |= AD193X_ADC_BCLK_INV;
 202                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 203                 dac_reg |= AD193X_DAC_BCLK_INV;
 204                 break;
 205         default:
 206                 return -EINVAL;
 207         }
 208
 209         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 210         case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
 211                 adc_reg2 |= AD193X_ADC_LCR_MASTER;
 212                 adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 213                 dac_reg |= AD193X_DAC_LCR_MASTER;
 214                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 215                 break;
 216         case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
 217                 adc_reg2 |= AD193X_ADC_LCR_MASTER;
 218                 adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 219                 dac_reg |= AD193X_DAC_LCR_MASTER;
 220                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 221                 break;
 222         case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
 223                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 224                 adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 225                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 226                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 227                 break;
 228         case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 229                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 230                 adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 231                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 232                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 233                 break;
 234         default:
 235                 return -EINVAL;
 236         }
 237
 238         snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
 239         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
 240         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 241
 242         return 0;
 243 }
 244
 245 static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 246                 int clk_id, unsigned int freq, int dir)
 247 {
 248         struct snd_soc_codec *codec = codec_dai->codec;
 249         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 250         switch (freq) {
 251         case 12288000:
 252         case 18432000:
 253         case 24576000:
 254         case 36864000:
 255                 ad193x->sysclk = freq;
 256                 return 0;
 257         }
 258         return -EINVAL;
 259 }
 260
 261 static int ad193x_hw_params(struct snd_pcm_substream *substream,
 262                 struct snd_pcm_hw_params *params,
 263                 struct snd_soc_dai *dai)
 264 {
 265         int word_len = 0, reg = 0, master_rate = 0;
 266
 267         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 268         struct snd_soc_codec *codec = rtd->codec;
 269         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 270
 271         /* bit size */
 272         switch (params_format(params)) {
 273         case SNDRV_PCM_FORMAT_S16_LE:
 274                 word_len = 3;
 275                 break;
 276         case SNDRV_PCM_FORMAT_S20_3LE:
 277                 word_len = 1;
 278                 break;
 279         case SNDRV_PCM_FORMAT_S24_LE:
 280         case SNDRV_PCM_FORMAT_S32_LE:
 281                 word_len = 0;
 282                 break;
 283         }
 284
 285         switch (ad193x->sysclk) {
 286         case 12288000:
 287                 master_rate = AD193X_PLL_INPUT_256;
 288                 break;
 289         case 18432000:
 290                 master_rate = AD193X_PLL_INPUT_384;
 291                 break;
 292         case 24576000:
 293                 master_rate = AD193X_PLL_INPUT_512;
 294                 break;
 295         case 36864000:
 296                 master_rate = AD193X_PLL_INPUT_768;
 297                 break;
 298         }
 299
 300         reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
 301         reg = (reg & (~AD193X_PLL_INPUT_MASK)) | master_rate;
 302         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);
 303
 304         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 305         reg = (reg & (~AD193X_DAC_WORD_LEN_MASK))
 306                 | (word_len << AD193X_DAC_WORD_LEN_SHFT);
 307         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 308
 309         reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
 310         reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
 311         snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
 312
 313         return 0;
 314 }
 315
 316 static struct snd_soc_dai_ops ad193x_dai_ops = {
 317         .hw_params = ad193x_hw_params,
 318         .digital_mute = ad193x_mute,
 319         .set_tdm_slot = ad193x_set_tdm_slot,
 320         .set_sysclk     = ad193x_set_dai_sysclk,
 321         .set_fmt = ad193x_set_dai_fmt,
 322 };
 323
 324 /* codec DAI instance */
 325 static struct snd_soc_dai_driver ad193x_dai = {
 326         .name = "ad193x-hifi",
 327         .playback = {
 328                 .stream_name = "Playback",
 329                 .channels_min = 2,
 330                 .channels_max = 8,
 331                 .rates = SNDRV_PCM_RATE_48000,
 332                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 333                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 334         },
 335         .capture = {
 336                 .stream_name = "Capture",
 337                 .channels_min = 2,
 338                 .channels_max = 4,
 339                 .rates = SNDRV_PCM_RATE_48000,
 340                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 341                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 342         },
 343         .ops = &ad193x_dai_ops,
 344 };
 345
 346 static int ad193x_probe(struct snd_soc_codec *codec)
 347 {
 348         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 349         struct snd_soc_dapm_context *dapm = &codec->dapm;
 350         int ret;
 351
 352         codec->control_data = ad193x->regmap;
 353         ret = snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
 354         if (ret < 0) {
 355                 dev_err(codec->dev, "failed to set cache I/O: %d\n", ret);
 356                 return ret;
 357         }
 358
 359         /* default setting for ad193x */
 360
 361         /* unmute dac channels */
 362         snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
 363         /* de-emphasis: 48kHz, powedown dac */
 364         snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
 365         /* powerdown dac, dac in tdm mode */
 366         snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
 367         /* high-pass filter enable */
 368         snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
 369         /* sata delay=1, adc aux mode */
 370         snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
 371         /* pll input: mclki/xi */
 372         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
 373         snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
 374
 375         snd_soc_add_controls(codec, ad193x_snd_controls,
 376                              ARRAY_SIZE(ad193x_snd_controls));
 377         snd_soc_dapm_new_controls(dapm, ad193x_dapm_widgets,
 378                                   ARRAY_SIZE(ad193x_dapm_widgets));
 379         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 380
 381         return ret;
 382 }
 383
 384 static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
 385         .probe =        ad193x_probe,
 386 };
 387
 388 #if defined(CONFIG_SPI_MASTER)
 389
 390 static const struct regmap_config ad193x_spi_regmap_config = {
 391         .val_bits = 8,
 392         .reg_bits = 16,
 393         .read_flag_mask = 0x09,
 394         .write_flag_mask = 0x08,
 395 };
 396
 397 static int __devinit ad193x_spi_probe(struct spi_device *spi)
 398 {
 399         struct ad193x_priv *ad193x;
 400         int ret;
 401
 402         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 403         if (ad193x == NULL)
 404                 return -ENOMEM;
 405
 406         ad193x->regmap = regmap_init_spi(spi, &ad193x_spi_regmap_config);
 407         if (IS_ERR(ad193x->regmap)) {
 408                 ret = PTR_ERR(ad193x->regmap);
 409                 goto err_free;
 410         }
 411
 412         spi_set_drvdata(spi, ad193x);
 413
 414         ret = snd_soc_register_codec(&spi->dev,
 415                         &soc_codec_dev_ad193x, &ad193x_dai, 1);
 416         if (ret < 0)
 417                 goto err_regmap_exit;
 418
 419         return 0;
 420
 421 err_regmap_exit:
 422         regmap_exit(ad193x->regmap);
 423 err_free:
 424         kfree(ad193x);
 425
 426         return ret;
 427 }
 428
 429 static int __devexit ad193x_spi_remove(struct spi_device *spi)
 430 {
 431         struct ad193x_priv *ad193x = spi_get_drvdata(spi);
 432
 433         snd_soc_unregister_codec(&spi->dev);
 434         regmap_exit(ad193x->regmap);
 435         kfree(ad193x);
 436         return 0;
 437 }
 438
 439 static struct spi_driver ad193x_spi_driver = {
 440         .driver = {
 441                 .name   = "ad193x",
 442                 .owner  = THIS_MODULE,
 443         },
 444         .probe          = ad193x_spi_probe,
 445         .remove         = __devexit_p(ad193x_spi_remove),
 446 };
 447 #endif
 448
 449 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 450
 451 static const struct regmap_config ad193x_i2c_regmap_config = {
 452         .val_bits = 8,
 453         .reg_bits = 8,
 454 };
 455
 456 static const struct i2c_device_id ad193x_id[] = {
 457         { "ad1936", 0 },
 458         { "ad1937", 0 },
 459         { }
 460 };
 461 MODULE_DEVICE_TABLE(i2c, ad193x_id);
 462
 463 static int __devinit ad193x_i2c_probe(struct i2c_client *client,
 464                 const struct i2c_device_id *id)
 465 {
 466         struct ad193x_priv *ad193x;
 467         int ret;
 468
 469         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 470         if (ad193x == NULL)
 471                 return -ENOMEM;
 472
 473         ad193x->regmap = regmap_init_i2c(client, &ad193x_i2c_regmap_config);
 474         if (IS_ERR(ad193x->regmap)) {
 475                 ret = PTR_ERR(ad193x->regmap);
 476                 goto err_free;
 477         }
 478
 479         i2c_set_clientdata(client, ad193x);
 480
 481         ret =  snd_soc_register_codec(&client->dev,
 482                         &soc_codec_dev_ad193x, &ad193x_dai, 1);
 483         if (ret < 0)
 484                 goto err_regmap_exit;
 485
 486         return 0;
 487
 488 err_regmap_exit:
 489         regmap_exit(ad193x->regmap);
 490 err_free:
 491         kfree(ad193x);
 492         return ret;
 493 }
 494
 495 static int __devexit ad193x_i2c_remove(struct i2c_client *client)
 496 {
 497         struct ad193x_priv *ad193x = i2c_get_clientdata(client);
 498
 499         snd_soc_unregister_codec(&client->dev);
 500         regmap_exit(ad193x->regmap);
 501         kfree(ad193x);
 502         return 0;
 503 }
 504
 505 static struct i2c_driver ad193x_i2c_driver = {
 506         .driver = {
 507                 .name = "ad193x",
 508         },
 509         .probe    = ad193x_i2c_probe,
 510         .remove   = __devexit_p(ad193x_i2c_remove),
 511         .id_table = ad193x_id,
 512 };
 513 #endif
 514
 515 static int __init ad193x_modinit(void)
 516 {
 517         int ret;
 518
 519 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 520         ret =  i2c_add_driver(&ad193x_i2c_driver);
 521         if (ret != 0) {
 522                 printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
 523                                 ret);
 524         }
 525 #endif
 526
 527 #if defined(CONFIG_SPI_MASTER)
 528         ret = spi_register_driver(&ad193x_spi_driver);
 529         if (ret != 0) {
 530                 printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
 531                                 ret);
 532         }
 533 #endif
 534         return ret;
 535 }
 536 module_init(ad193x_modinit);
 537
 538 static void __exit ad193x_modexit(void)
 539 {
 540 #if defined(CONFIG_SPI_MASTER)
 541         spi_unregister_driver(&ad193x_spi_driver);
 542 #endif
 543
 544 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 545         i2c_del_driver(&ad193x_i2c_driver);
 546 #endif
 547 }
 548 module_exit(ad193x_modexit);
 549
 550 MODULE_DESCRIPTION("ASoC ad193x driver");
 551 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 552 MODULE_LICENSE("GPL");