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
 107         if (mute)
 108                 snd_soc_update_bits(codec, AD193X_DAC_CTRL2,
 109                                     AD193X_DAC_MASTER_MUTE,
 110                                     AD193X_DAC_MASTER_MUTE);
 111         else
 112                 snd_soc_update_bits(codec, AD193X_DAC_CTRL2,
 113                                     AD193X_DAC_MASTER_MUTE, 0);
 114
 115         return 0;
 116 }
 117
 118 static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 119                                unsigned int rx_mask, int slots, int width)
 120 {
 121         struct snd_soc_codec *codec = dai->codec;
 122         int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 123         int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
 124
 125         dac_reg &= ~AD193X_DAC_CHAN_MASK;
 126         adc_reg &= ~AD193X_ADC_CHAN_MASK;
 127
 128         switch (slots) {
 129         case 2:
 130                 dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
 131                 adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
 132                 break;
 133         case 4:
 134                 dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
 135                 adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
 136                 break;
 137         case 8:
 138                 dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
 139                 adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
 140                 break;
 141         case 16:
 142                 dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
 143                 adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
 144                 break;
 145         default:
 146                 return -EINVAL;
 147         }
 148
 149         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 150         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
 151
 152         return 0;
 153 }
 154
 155 static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 156                 unsigned int fmt)
 157 {
 158         struct snd_soc_codec *codec = codec_dai->codec;
 159         int adc_reg1, adc_reg2, dac_reg;
 160
 161         adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
 162         adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
 163         dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 164
 165         /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
 166          * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
 167          */
 168         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 169         case SND_SOC_DAIFMT_I2S:
 170                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 171                 adc_reg1 |= AD193X_ADC_SERFMT_TDM;
 172                 break;
 173         case SND_SOC_DAIFMT_DSP_A:
 174                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 175                 adc_reg1 |= AD193X_ADC_SERFMT_AUX;
 176                 break;
 177         default:
 178                 return -EINVAL;
 179         }
 180
 181         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 182         case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
 183                 adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 184                 adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 185                 dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 186                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 187                 break;
 188         case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
 189                 adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 190                 adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 191                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 192                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 193                 break;
 194         case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
 195                 adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 196                 adc_reg2 |= AD193X_ADC_BCLK_INV;
 197                 dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 198                 dac_reg |= AD193X_DAC_BCLK_INV;
 199                 break;
 200
 201         case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
 202                 adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 203                 adc_reg2 |= AD193X_ADC_BCLK_INV;
 204                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 205                 dac_reg |= AD193X_DAC_BCLK_INV;
 206                 break;
 207         default:
 208                 return -EINVAL;
 209         }
 210
 211         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 212         case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
 213                 adc_reg2 |= AD193X_ADC_LCR_MASTER;
 214                 adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 215                 dac_reg |= AD193X_DAC_LCR_MASTER;
 216                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 217                 break;
 218         case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
 219                 adc_reg2 |= AD193X_ADC_LCR_MASTER;
 220                 adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 221                 dac_reg |= AD193X_DAC_LCR_MASTER;
 222                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 223                 break;
 224         case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
 225                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 226                 adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 227                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 228                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 229                 break;
 230         case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 231                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 232                 adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 233                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 234                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 235                 break;
 236         default:
 237                 return -EINVAL;
 238         }
 239
 240         snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
 241         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
 242         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 243
 244         return 0;
 245 }
 246
 247 static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 248                 int clk_id, unsigned int freq, int dir)
 249 {
 250         struct snd_soc_codec *codec = codec_dai->codec;
 251         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 252         switch (freq) {
 253         case 12288000:
 254         case 18432000:
 255         case 24576000:
 256         case 36864000:
 257                 ad193x->sysclk = freq;
 258                 return 0;
 259         }
 260         return -EINVAL;
 261 }
 262
 263 static int ad193x_hw_params(struct snd_pcm_substream *substream,
 264                 struct snd_pcm_hw_params *params,
 265                 struct snd_soc_dai *dai)
 266 {
 267         int word_len = 0, master_rate = 0;
 268
 269         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 270         struct snd_soc_codec *codec = rtd->codec;
 271         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 272
 273         /* bit size */
 274         switch (params_format(params)) {
 275         case SNDRV_PCM_FORMAT_S16_LE:
 276                 word_len = 3;
 277                 break;
 278         case SNDRV_PCM_FORMAT_S20_3LE:
 279                 word_len = 1;
 280                 break;
 281         case SNDRV_PCM_FORMAT_S24_LE:
 282         case SNDRV_PCM_FORMAT_S32_LE:
 283                 word_len = 0;
 284                 break;
 285         }
 286
 287         switch (ad193x->sysclk) {
 288         case 12288000:
 289                 master_rate = AD193X_PLL_INPUT_256;
 290                 break;
 291         case 18432000:
 292                 master_rate = AD193X_PLL_INPUT_384;
 293                 break;
 294         case 24576000:
 295                 master_rate = AD193X_PLL_INPUT_512;
 296                 break;
 297         case 36864000:
 298                 master_rate = AD193X_PLL_INPUT_768;
 299                 break;
 300         }
 301
 302         snd_soc_update_bits(codec, AD193X_PLL_CLK_CTRL0,
 303                             AD193X_PLL_INPUT_MASK, master_rate);
 304
 305         snd_soc_update_bits(codec, AD193X_DAC_CTRL2,
 306                             AD193X_DAC_WORD_LEN_MASK,
 307                             word_len << AD193X_DAC_WORD_LEN_SHFT);
 308
 309         snd_soc_update_bits(codec, AD193X_ADC_CTRL1,
 310                             AD193X_ADC_WORD_LEN_MASK, word_len);
 311
 312         return 0;
 313 }
 314
 315 static struct snd_soc_dai_ops ad193x_dai_ops = {
 316         .hw_params = ad193x_hw_params,
 317         .digital_mute = ad193x_mute,
 318         .set_tdm_slot = ad193x_set_tdm_slot,
 319         .set_sysclk     = ad193x_set_dai_sysclk,
 320         .set_fmt = ad193x_set_dai_fmt,
 321 };
 322
 323 /* codec DAI instance */
 324 static struct snd_soc_dai_driver ad193x_dai = {
 325         .name = "ad193x-hifi",
 326         .playback = {
 327                 .stream_name = "Playback",
 328                 .channels_min = 2,
 329                 .channels_max = 8,
 330                 .rates = SNDRV_PCM_RATE_48000,
 331                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 332                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 333         },
 334         .capture = {
 335                 .stream_name = "Capture",
 336                 .channels_min = 2,
 337                 .channels_max = 4,
 338                 .rates = SNDRV_PCM_RATE_48000,
 339                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 340                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 341         },
 342         .ops = &ad193x_dai_ops,
 343 };
 344
 345 static int ad193x_probe(struct snd_soc_codec *codec)
 346 {
 347         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 348         struct snd_soc_dapm_context *dapm = &codec->dapm;
 349         int ret;
 350
 351         codec->control_data = ad193x->regmap;
 352         ret = snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
 353         if (ret < 0) {
 354                 dev_err(codec->dev, "failed to set cache I/O: %d\n", ret);
 355                 return ret;
 356         }
 357
 358         /* default setting for ad193x */
 359
 360         /* unmute dac channels */
 361         snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
 362         /* de-emphasis: 48kHz, powedown dac */
 363         snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
 364         /* powerdown dac, dac in tdm mode */
 365         snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
 366         /* high-pass filter enable */
 367         snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
 368         /* sata delay=1, adc aux mode */
 369         snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
 370         /* pll input: mclki/xi */
 371         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
 372         snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
 373
 374         snd_soc_add_controls(codec, ad193x_snd_controls,
 375                              ARRAY_SIZE(ad193x_snd_controls));
 376         snd_soc_dapm_new_controls(dapm, ad193x_dapm_widgets,
 377                                   ARRAY_SIZE(ad193x_dapm_widgets));
 378         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 379
 380         return ret;
 381 }
 382
 383 static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
 384         .probe =        ad193x_probe,
 385 };
 386
 387 #if defined(CONFIG_SPI_MASTER)
 388
 389 static const struct regmap_config ad193x_spi_regmap_config = {
 390         .val_bits = 8,
 391         .reg_bits = 16,
 392         .read_flag_mask = 0x09,
 393         .write_flag_mask = 0x08,
 394 };
 395
 396 static int __devinit ad193x_spi_probe(struct spi_device *spi)
 397 {
 398         struct ad193x_priv *ad193x;
 399         int ret;
 400
 401         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 402         if (ad193x == NULL)
 403                 return -ENOMEM;
 404
 405         ad193x->regmap = regmap_init_spi(spi, &ad193x_spi_regmap_config);
 406         if (IS_ERR(ad193x->regmap)) {
 407                 ret = PTR_ERR(ad193x->regmap);
 408                 goto err_free;
 409         }
 410
 411         spi_set_drvdata(spi, ad193x);
 412
 413         ret = snd_soc_register_codec(&spi->dev,
 414                         &soc_codec_dev_ad193x, &ad193x_dai, 1);
 415         if (ret < 0)
 416                 goto err_regmap_exit;
 417
 418         return 0;
 419
 420 err_regmap_exit:
 421         regmap_exit(ad193x->regmap);
 422 err_free:
 423         kfree(ad193x);
 424
 425         return ret;
 426 }
 427
 428 static int __devexit ad193x_spi_remove(struct spi_device *spi)
 429 {
 430         struct ad193x_priv *ad193x = spi_get_drvdata(spi);
 431
 432         snd_soc_unregister_codec(&spi->dev);
 433         regmap_exit(ad193x->regmap);
 434         kfree(ad193x);
 435         return 0;
 436 }
 437
 438 static struct spi_driver ad193x_spi_driver = {
 439         .driver = {
 440                 .name   = "ad193x",
 441                 .owner  = THIS_MODULE,
 442         },
 443         .probe          = ad193x_spi_probe,
 444         .remove         = __devexit_p(ad193x_spi_remove),
 445 };
 446 #endif
 447
 448 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 449
 450 static const struct regmap_config ad193x_i2c_regmap_config = {
 451         .val_bits = 8,
 452         .reg_bits = 8,
 453 };
 454
 455 static const struct i2c_device_id ad193x_id[] = {
 456         { "ad1936", 0 },
 457         { "ad1937", 0 },
 458         { }
 459 };
 460 MODULE_DEVICE_TABLE(i2c, ad193x_id);
 461
 462 static int __devinit ad193x_i2c_probe(struct i2c_client *client,
 463                 const struct i2c_device_id *id)
 464 {
 465         struct ad193x_priv *ad193x;
 466         int ret;
 467
 468         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 469         if (ad193x == NULL)
 470                 return -ENOMEM;
 471
 472         ad193x->regmap = regmap_init_i2c(client, &ad193x_i2c_regmap_config);
 473         if (IS_ERR(ad193x->regmap)) {
 474                 ret = PTR_ERR(ad193x->regmap);
 475                 goto err_free;
 476         }
 477
 478         i2c_set_clientdata(client, ad193x);
 479
 480         ret =  snd_soc_register_codec(&client->dev,
 481                         &soc_codec_dev_ad193x, &ad193x_dai, 1);
 482         if (ret < 0)
 483                 goto err_regmap_exit;
 484
 485         return 0;
 486
 487 err_regmap_exit:
 488         regmap_exit(ad193x->regmap);
 489 err_free:
 490         kfree(ad193x);
 491         return ret;
 492 }
 493
 494 static int __devexit ad193x_i2c_remove(struct i2c_client *client)
 495 {
 496         struct ad193x_priv *ad193x = i2c_get_clientdata(client);
 497
 498         snd_soc_unregister_codec(&client->dev);
 499         regmap_exit(ad193x->regmap);
 500         kfree(ad193x);
 501         return 0;
 502 }
 503
 504 static struct i2c_driver ad193x_i2c_driver = {
 505         .driver = {
 506                 .name = "ad193x",
 507         },
 508         .probe    = ad193x_i2c_probe,
 509         .remove   = __devexit_p(ad193x_i2c_remove),
 510         .id_table = ad193x_id,
 511 };
 512 #endif
 513
 514 static int __init ad193x_modinit(void)
 515 {
 516         int ret;
 517
 518 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 519         ret =  i2c_add_driver(&ad193x_i2c_driver);
 520         if (ret != 0) {
 521                 printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
 522                                 ret);
 523         }
 524 #endif
 525
 526 #if defined(CONFIG_SPI_MASTER)
 527         ret = spi_register_driver(&ad193x_spi_driver);
 528         if (ret != 0) {
 529                 printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
 530                                 ret);
 531         }
 532 #endif
 533         return ret;
 534 }
 535 module_init(ad193x_modinit);
 536
 537 static void __exit ad193x_modexit(void)
 538 {
 539 #if defined(CONFIG_SPI_MASTER)
 540         spi_unregister_driver(&ad193x_spi_driver);
 541 #endif
 542
 543 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 544         i2c_del_driver(&ad193x_i2c_driver);
 545 #endif
 546 }
 547 module_exit(ad193x_modexit);
 548
 549 MODULE_DESCRIPTION("ASoC ad193x driver");
 550 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 551 MODULE_LICENSE("GPL");