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 <sound/soc-dapm.h>
  23 #include "ad193x.h"
  24
  25 /* codec private data */
  26 struct ad193x_priv {
  27         struct snd_soc_codec codec;
  28         u8 reg_cache[AD193X_NUM_REGS];
  29 };
  30
  31 /* ad193x register cache & default register settings */
  32 static const u8 ad193x_reg[AD193X_NUM_REGS] = {
  33         0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
  34 };
  35
  36 static struct snd_soc_codec *ad193x_codec;
  37 struct snd_soc_codec_device soc_codec_dev_ad193x;
  38
  39 /*
  40  * AD193X volume/mute/de-emphasis etc. controls
  41  */
  42 static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
  43
  44 static const struct soc_enum ad193x_deemp_enum =
  45         SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);
  46
  47 static const struct snd_kcontrol_new ad193x_snd_controls[] = {
  48         /* DAC volume control */
  49         SOC_DOUBLE_R("DAC1  Volume", AD193X_DAC_L1_VOL,
  50                         AD193X_DAC_R1_VOL, 0, 0xFF, 1),
  51         SOC_DOUBLE_R("DAC2  Volume", AD193X_DAC_L2_VOL,
  52                         AD193X_DAC_R2_VOL, 0, 0xFF, 1),
  53         SOC_DOUBLE_R("DAC3  Volume", AD193X_DAC_L3_VOL,
  54                         AD193X_DAC_R3_VOL, 0, 0xFF, 1),
  55         SOC_DOUBLE_R("DAC4  Volume", AD193X_DAC_L4_VOL,
  56                         AD193X_DAC_R4_VOL, 0, 0xFF, 1),
  57
  58         /* ADC switch control */
  59         SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
  60                 AD193X_ADCR1_MUTE, 1, 1),
  61         SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
  62                 AD193X_ADCR2_MUTE, 1, 1),
  63
  64         /* DAC switch control */
  65         SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
  66                 AD193X_DACR1_MUTE, 1, 1),
  67         SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
  68                 AD193X_DACR2_MUTE, 1, 1),
  69         SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
  70                 AD193X_DACR3_MUTE, 1, 1),
  71         SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
  72                 AD193X_DACR4_MUTE, 1, 1),
  73
  74         /* ADC high-pass filter */
  75         SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
  76                         AD193X_ADC_HIGHPASS_FILTER, 1, 0),
  77
  78         /* DAC de-emphasis */
  79         SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
  80 };
  81
  82 static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
  83         SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
  84         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
  85         SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
  86         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
  87         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  88         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  89         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  90         SND_SOC_DAPM_OUTPUT("DAC4OUT"),
  91         SND_SOC_DAPM_INPUT("ADC1IN"),
  92         SND_SOC_DAPM_INPUT("ADC2IN"),
  93 };
  94
  95 static const struct snd_soc_dapm_route audio_paths[] = {
  96         { "DAC", NULL, "PLL_PWR" },
  97         { "ADC", NULL, "PLL_PWR" },
  98         { "DAC", NULL, "ADC_PWR" },
  99         { "ADC", NULL, "ADC_PWR" },
 100         { "DAC1OUT", "DAC1 Switch", "DAC" },
 101         { "DAC2OUT", "DAC2 Switch", "DAC" },
 102         { "DAC3OUT", "DAC3 Switch", "DAC" },
 103         { "DAC4OUT", "DAC4 Switch", "DAC" },
 104         { "ADC", "ADC1 Switch", "ADC1IN" },
 105         { "ADC", "ADC2 Switch", "ADC2IN" },
 106 };
 107
 108 /*
 109  * DAI ops entries
 110  */
 111
 112 static int ad193x_mute(struct snd_soc_dai *dai, int mute)
 113 {
 114         struct snd_soc_codec *codec = dai->codec;
 115         int reg;
 116
 117         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 118         reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
 119                 (~AD193X_DAC_MASTER_MUTE);
 120         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 121
 122         return 0;
 123 }
 124
 125 static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 126                                unsigned int rx_mask, int slots, int width)
 127 {
 128         struct snd_soc_codec *codec = dai->codec;
 129         int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 130         int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
 131
 132         dac_reg &= ~AD193X_DAC_CHAN_MASK;
 133         adc_reg &= ~AD193X_ADC_CHAN_MASK;
 134
 135         switch (slots) {
 136         case 2:
 137                 dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
 138                 adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
 139                 break;
 140         case 4:
 141                 dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
 142                 adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
 143                 break;
 144         case 8:
 145                 dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
 146                 adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
 147                 break;
 148         case 16:
 149                 dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
 150                 adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
 151                 break;
 152         default:
 153                 return -EINVAL;
 154         }
 155
 156         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 157         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
 158
 159         return 0;
 160 }
 161
 162 static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 163                 unsigned int fmt)
 164 {
 165         struct snd_soc_codec *codec = codec_dai->codec;
 166         int adc_reg, dac_reg;
 167
 168         adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
 169         dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 170
 171         /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
 172          * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
 173          */
 174         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 175         case SND_SOC_DAIFMT_I2S:
 176                 adc_reg &= ~AD193X_ADC_SERFMT_MASK;
 177                 adc_reg |= AD193X_ADC_SERFMT_TDM;
 178                 break;
 179         case SND_SOC_DAIFMT_DSP_A:
 180                 adc_reg &= ~AD193X_ADC_SERFMT_MASK;
 181                 adc_reg |= AD193X_ADC_SERFMT_AUX;
 182                 break;
 183         default:
 184                 return -EINVAL;
 185         }
 186
 187         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 188         case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
 189                 adc_reg &= ~AD193X_ADC_LEFT_HIGH;
 190                 adc_reg &= ~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_NB_IF: /* normal bclk + invert frm */
 195                 adc_reg |= AD193X_ADC_LEFT_HIGH;
 196                 adc_reg &= ~AD193X_ADC_BCLK_INV;
 197                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 198                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 199                 break;
 200         case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
 201                 adc_reg &= ~AD193X_ADC_LEFT_HIGH;
 202                 adc_reg |= AD193X_ADC_BCLK_INV;
 203                 dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 204                 dac_reg |= AD193X_DAC_BCLK_INV;
 205                 break;
 206
 207         case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
 208                 adc_reg |= AD193X_ADC_LEFT_HIGH;
 209                 adc_reg |= AD193X_ADC_BCLK_INV;
 210                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 211                 dac_reg |= AD193X_DAC_BCLK_INV;
 212                 break;
 213         default:
 214                 return -EINVAL;
 215         }
 216
 217         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 218         case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
 219                 adc_reg |= AD193X_ADC_LCR_MASTER;
 220                 adc_reg |= 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_CBS_CFM: /* codec clk slave & frm master */
 225                 adc_reg |= AD193X_ADC_LCR_MASTER;
 226                 adc_reg &= ~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_CBM_CFS: /* codec clk master & frame slave */
 231                 adc_reg &= ~AD193X_ADC_LCR_MASTER;
 232                 adc_reg |= AD193X_ADC_BCLK_MASTER;
 233                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 234                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 235                 break;
 236         case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 237                 adc_reg &= ~AD193X_ADC_LCR_MASTER;
 238                 adc_reg &= ~AD193X_ADC_BCLK_MASTER;
 239                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 240                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 241                 break;
 242         default:
 243                 return -EINVAL;
 244         }
 245
 246         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
 247         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 248
 249         return 0;
 250 }
 251
 252 static int ad193x_hw_params(struct snd_pcm_substream *substream,
 253                 struct snd_pcm_hw_params *params,
 254                 struct snd_soc_dai *dai)
 255 {
 256         int word_len = 0, reg = 0;
 257
 258         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 259         struct snd_soc_device *socdev = rtd->socdev;
 260         struct snd_soc_codec *codec = socdev->card->codec;
 261
 262         /* bit size */
 263         switch (params_format(params)) {
 264         case SNDRV_PCM_FORMAT_S16_LE:
 265                 word_len = 3;
 266                 break;
 267         case SNDRV_PCM_FORMAT_S20_3LE:
 268                 word_len = 1;
 269                 break;
 270         case SNDRV_PCM_FORMAT_S24_LE:
 271         case SNDRV_PCM_FORMAT_S32_LE:
 272                 word_len = 0;
 273                 break;
 274         }
 275
 276         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 277         reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
 278         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 279
 280         reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
 281         reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
 282         snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
 283
 284         return 0;
 285 }
 286
 287 static int ad193x_bus_probe(struct device *dev, void *ctrl_data, int bus_type)
 288 {
 289         struct snd_soc_codec *codec;
 290         struct ad193x_priv *ad193x;
 291         int ret;
 292
 293         if (ad193x_codec) {
 294                 dev_err(dev, "Another ad193x is registered\n");
 295                 return -EINVAL;
 296         }
 297
 298         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 299         if (ad193x == NULL)
 300                 return -ENOMEM;
 301
 302         dev_set_drvdata(dev, ad193x);
 303
 304         codec = &ad193x->codec;
 305         mutex_init(&codec->mutex);
 306         codec->control_data = ctrl_data;
 307         codec->dev = dev;
 308         codec->private_data = ad193x;
 309         codec->reg_cache = ad193x->reg_cache;
 310         codec->reg_cache_size = AD193X_NUM_REGS;
 311         codec->name = "AD193X";
 312         codec->owner = THIS_MODULE;
 313         codec->dai = &ad193x_dai;
 314         codec->num_dai = 1;
 315         INIT_LIST_HEAD(&codec->dapm_widgets);
 316         INIT_LIST_HEAD(&codec->dapm_paths);
 317
 318         ad193x_dai.dev = codec->dev;
 319         ad193x_codec = codec;
 320
 321         memcpy(codec->reg_cache, ad193x_reg, AD193X_NUM_REGS);
 322
 323         if (bus_type == SND_SOC_I2C)
 324                 ret = snd_soc_codec_set_cache_io(codec, 8, 8, bus_type);
 325         else
 326                 ret = snd_soc_codec_set_cache_io(codec, 16, 8, bus_type);
 327         if (ret < 0) {
 328                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 329                                 ret);
 330                 kfree(ad193x);
 331                 return ret;
 332         }
 333
 334         /* default setting for ad193x */
 335
 336         /* unmute dac channels */
 337         snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
 338         /* de-emphasis: 48kHz, powedown dac */
 339         snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
 340         /* powerdown dac, dac in tdm mode */
 341         snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
 342         /* high-pass filter enable */
 343         snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
 344         /* sata delay=1, adc aux mode */
 345         snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
 346         /* pll input: mclki/xi */
 347         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
 348         snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
 349
 350         ret = snd_soc_register_codec(codec);
 351         if (ret != 0) {
 352                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 353                 kfree(ad193x);
 354                 return ret;
 355         }
 356
 357         ret = snd_soc_register_dai(&ad193x_dai);
 358         if (ret != 0) {
 359                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 360                 snd_soc_unregister_codec(codec);
 361                 kfree(ad193x);
 362                 return ret;
 363         }
 364
 365         return 0;
 366 }
 367
 368 static int ad193x_bus_remove(struct device *dev)
 369 {
 370         struct ad193x_priv *ad193x = dev_get_drvdata(dev);
 371
 372         snd_soc_unregister_dai(&ad193x_dai);
 373         snd_soc_unregister_codec(&ad193x->codec);
 374         kfree(ad193x);
 375         ad193x_codec = NULL;
 376
 377         return 0;
 378 }
 379
 380 static struct snd_soc_dai_ops ad193x_dai_ops = {
 381         .hw_params = ad193x_hw_params,
 382         .digital_mute = ad193x_mute,
 383         .set_tdm_slot = ad193x_set_tdm_slot,
 384         .set_fmt = ad193x_set_dai_fmt,
 385 };
 386
 387 /* codec DAI instance */
 388 struct snd_soc_dai ad193x_dai = {
 389         .name = "AD193X",
 390         .playback = {
 391                 .stream_name = "Playback",
 392                 .channels_min = 2,
 393                 .channels_max = 8,
 394                 .rates = SNDRV_PCM_RATE_48000,
 395                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 396                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 397         },
 398         .capture = {
 399                 .stream_name = "Capture",
 400                 .channels_min = 2,
 401                 .channels_max = 4,
 402                 .rates = SNDRV_PCM_RATE_48000,
 403                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 404                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 405         },
 406         .ops = &ad193x_dai_ops,
 407 };
 408 EXPORT_SYMBOL_GPL(ad193x_dai);
 409
 410 static int ad193x_probe(struct platform_device *pdev)
 411 {
 412         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 413         struct snd_soc_codec *codec;
 414         int ret = 0;
 415
 416         if (ad193x_codec == NULL) {
 417                 dev_err(&pdev->dev, "Codec device not registered\n");
 418                 return -ENODEV;
 419         }
 420
 421         socdev->card->codec = ad193x_codec;
 422         codec = ad193x_codec;
 423
 424         /* register pcms */
 425         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 426         if (ret < 0) {
 427                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 428                 goto pcm_err;
 429         }
 430
 431         snd_soc_add_controls(codec, ad193x_snd_controls,
 432                              ARRAY_SIZE(ad193x_snd_controls));
 433         snd_soc_dapm_new_controls(codec, ad193x_dapm_widgets,
 434                                   ARRAY_SIZE(ad193x_dapm_widgets));
 435         snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
 436
 437 pcm_err:
 438         return ret;
 439 }
 440
 441 /* power down chip */
 442 static int ad193x_remove(struct platform_device *pdev)
 443 {
 444         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 445
 446         snd_soc_free_pcms(socdev);
 447         snd_soc_dapm_free(socdev);
 448
 449         return 0;
 450 }
 451
 452 struct snd_soc_codec_device soc_codec_dev_ad193x = {
 453         .probe =        ad193x_probe,
 454         .remove =       ad193x_remove,
 455 };
 456 EXPORT_SYMBOL_GPL(soc_codec_dev_ad193x);
 457
 458 #if defined(CONFIG_SPI_MASTER)
 459 static int __devinit ad193x_spi_probe(struct spi_device *spi)
 460 {
 461         return ad193x_bus_probe(&spi->dev, spi, SND_SOC_SPI);
 462 }
 463
 464 static int __devexit ad193x_spi_remove(struct spi_device *spi)
 465 {
 466         return ad193x_bus_remove(&spi->dev);
 467 }
 468
 469 static struct spi_driver ad193x_spi_driver = {
 470         .driver = {
 471                 .name   = "ad193x",
 472                 .owner  = THIS_MODULE,
 473         },
 474         .probe          = ad193x_spi_probe,
 475         .remove         = __devexit_p(ad193x_spi_remove),
 476 };
 477 #endif
 478
 479 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 480 static const struct i2c_device_id ad193x_id[] = {
 481         { "ad1936", 0 },
 482         { "ad1937", 0 },
 483         { }
 484 };
 485 MODULE_DEVICE_TABLE(i2c, ad193x_id);
 486
 487 static int __devinit ad193x_i2c_probe(struct i2c_client *client,
 488                 const struct i2c_device_id *id)
 489 {
 490         return ad193x_bus_probe(&client->dev, client, SND_SOC_I2C);
 491 }
 492
 493 static int __devexit ad193x_i2c_remove(struct i2c_client *client)
 494 {
 495         return ad193x_bus_remove(&client->dev);
 496 }
 497
 498 static struct i2c_driver ad193x_i2c_driver = {
 499         .driver = {
 500                 .name = "ad193x",
 501         },
 502         .probe    = ad193x_i2c_probe,
 503         .remove   = __devexit_p(ad193x_i2c_remove),
 504         .id_table = ad193x_id,
 505 };
 506 #endif
 507
 508 static int __init ad193x_modinit(void)
 509 {
 510         int ret;
 511
 512 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 513         ret =  i2c_add_driver(&ad193x_i2c_driver);
 514         if (ret != 0) {
 515                 printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
 516                                 ret);
 517         }
 518 #endif
 519
 520 #if defined(CONFIG_SPI_MASTER)
 521         ret = spi_register_driver(&ad193x_spi_driver);
 522         if (ret != 0) {
 523                 printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
 524                                 ret);
 525         }
 526 #endif
 527         return ret;
 528 }
 529 module_init(ad193x_modinit);
 530
 531 static void __exit ad193x_modexit(void)
 532 {
 533 #if defined(CONFIG_SPI_MASTER)
 534         spi_unregister_driver(&ad193x_spi_driver);
 535 #endif
 536
 537 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 538         i2c_del_driver(&ad193x_i2c_driver);
 539 #endif
 540 }
 541 module_exit(ad193x_modexit);
 542
 543 MODULE_DESCRIPTION("ASoC ad193x driver");
 544 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 545 MODULE_LICENSE("GPL");