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_reg1, adc_reg2, dac_reg;
 167
 168         adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
 169         adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
 170         dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 171
 172         /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
 173          * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
 174          */
 175         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 176         case SND_SOC_DAIFMT_I2S:
 177                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 178                 adc_reg1 |= AD193X_ADC_SERFMT_TDM;
 179                 break;
 180         case SND_SOC_DAIFMT_DSP_A:
 181                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 182                 adc_reg1 |= AD193X_ADC_SERFMT_AUX;
 183                 break;
 184         default:
 185                 return -EINVAL;
 186         }
 187
 188         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 189         case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
 190                 adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 191                 adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 192                 dac_reg &= ~AD193X_DAC_LEFT_HIGH;
 193                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 194                 break;
 195         case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
 196                 adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 197                 adc_reg2 &= ~AD193X_ADC_BCLK_INV;
 198                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 199                 dac_reg &= ~AD193X_DAC_BCLK_INV;
 200                 break;
 201         case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal 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
 208         case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
 209                 adc_reg2 |= AD193X_ADC_LEFT_HIGH;
 210                 adc_reg2 |= AD193X_ADC_BCLK_INV;
 211                 dac_reg |= AD193X_DAC_LEFT_HIGH;
 212                 dac_reg |= AD193X_DAC_BCLK_INV;
 213                 break;
 214         default:
 215                 return -EINVAL;
 216         }
 217
 218         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 219         case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
 220                 adc_reg2 |= AD193X_ADC_LCR_MASTER;
 221                 adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 222                 dac_reg |= AD193X_DAC_LCR_MASTER;
 223                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 224                 break;
 225         case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
 226                 adc_reg2 |= AD193X_ADC_LCR_MASTER;
 227                 adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 228                 dac_reg |= AD193X_DAC_LCR_MASTER;
 229                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 230                 break;
 231         case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
 232                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 233                 adc_reg2 |= AD193X_ADC_BCLK_MASTER;
 234                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 235                 dac_reg |= AD193X_DAC_BCLK_MASTER;
 236                 break;
 237         case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 238                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 239                 adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
 240                 dac_reg &= ~AD193X_DAC_LCR_MASTER;
 241                 dac_reg &= ~AD193X_DAC_BCLK_MASTER;
 242                 break;
 243         default:
 244                 return -EINVAL;
 245         }
 246
 247         snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
 248         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
 249         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 250
 251         return 0;
 252 }
 253
 254 static int ad193x_hw_params(struct snd_pcm_substream *substream,
 255                 struct snd_pcm_hw_params *params,
 256                 struct snd_soc_dai *dai)
 257 {
 258         int word_len = 0, reg = 0;
 259
 260         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 261         struct snd_soc_device *socdev = rtd->socdev;
 262         struct snd_soc_codec *codec = socdev->card->codec;
 263
 264         /* bit size */
 265         switch (params_format(params)) {
 266         case SNDRV_PCM_FORMAT_S16_LE:
 267                 word_len = 3;
 268                 break;
 269         case SNDRV_PCM_FORMAT_S20_3LE:
 270                 word_len = 1;
 271                 break;
 272         case SNDRV_PCM_FORMAT_S24_LE:
 273         case SNDRV_PCM_FORMAT_S32_LE:
 274                 word_len = 0;
 275                 break;
 276         }
 277
 278         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 279         reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
 280         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 281
 282         reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
 283         reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
 284         snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
 285
 286         return 0;
 287 }
 288
 289 static int ad193x_bus_probe(struct device *dev, void *ctrl_data, int bus_type)
 290 {
 291         struct snd_soc_codec *codec;
 292         struct ad193x_priv *ad193x;
 293         int ret;
 294
 295         if (ad193x_codec) {
 296                 dev_err(dev, "Another ad193x is registered\n");
 297                 return -EINVAL;
 298         }
 299
 300         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 301         if (ad193x == NULL)
 302                 return -ENOMEM;
 303
 304         dev_set_drvdata(dev, ad193x);
 305
 306         codec = &ad193x->codec;
 307         mutex_init(&codec->mutex);
 308         codec->control_data = ctrl_data;
 309         codec->dev = dev;
 310         snd_soc_codec_set_drvdata(codec, ad193x);
 311         codec->reg_cache = ad193x->reg_cache;
 312         codec->reg_cache_size = AD193X_NUM_REGS;
 313         codec->name = "AD193X";
 314         codec->owner = THIS_MODULE;
 315         codec->dai = &ad193x_dai;
 316         codec->num_dai = 1;
 317         INIT_LIST_HEAD(&codec->dapm_widgets);
 318         INIT_LIST_HEAD(&codec->dapm_paths);
 319
 320         ad193x_dai.dev = codec->dev;
 321         ad193x_codec = codec;
 322
 323         memcpy(codec->reg_cache, ad193x_reg, AD193X_NUM_REGS);
 324
 325         if (bus_type == SND_SOC_I2C)
 326                 ret = snd_soc_codec_set_cache_io(codec, 8, 8, bus_type);
 327         else
 328                 ret = snd_soc_codec_set_cache_io(codec, 16, 8, bus_type);
 329         if (ret < 0) {
 330                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 331                                 ret);
 332                 kfree(ad193x);
 333                 return ret;
 334         }
 335
 336         /* default setting for ad193x */
 337
 338         /* unmute dac channels */
 339         snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
 340         /* de-emphasis: 48kHz, powedown dac */
 341         snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
 342         /* powerdown dac, dac in tdm mode */
 343         snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
 344         /* high-pass filter enable */
 345         snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
 346         /* sata delay=1, adc aux mode */
 347         snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
 348         /* pll input: mclki/xi */
 349         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
 350         snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
 351
 352         ret = snd_soc_register_codec(codec);
 353         if (ret != 0) {
 354                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 355                 kfree(ad193x);
 356                 return ret;
 357         }
 358
 359         ret = snd_soc_register_dai(&ad193x_dai);
 360         if (ret != 0) {
 361                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 362                 snd_soc_unregister_codec(codec);
 363                 kfree(ad193x);
 364                 return ret;
 365         }
 366
 367         return 0;
 368 }
 369
 370 static int ad193x_bus_remove(struct device *dev)
 371 {
 372         struct ad193x_priv *ad193x = dev_get_drvdata(dev);
 373
 374         snd_soc_unregister_dai(&ad193x_dai);
 375         snd_soc_unregister_codec(&ad193x->codec);
 376         kfree(ad193x);
 377         ad193x_codec = NULL;
 378
 379         return 0;
 380 }
 381
 382 static struct snd_soc_dai_ops ad193x_dai_ops = {
 383         .hw_params = ad193x_hw_params,
 384         .digital_mute = ad193x_mute,
 385         .set_tdm_slot = ad193x_set_tdm_slot,
 386         .set_fmt = ad193x_set_dai_fmt,
 387 };
 388
 389 /* codec DAI instance */
 390 struct snd_soc_dai ad193x_dai = {
 391         .name = "AD193X",
 392         .playback = {
 393                 .stream_name = "Playback",
 394                 .channels_min = 2,
 395                 .channels_max = 8,
 396                 .rates = SNDRV_PCM_RATE_48000,
 397                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 398                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 399         },
 400         .capture = {
 401                 .stream_name = "Capture",
 402                 .channels_min = 2,
 403                 .channels_max = 4,
 404                 .rates = SNDRV_PCM_RATE_48000,
 405                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 406                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 407         },
 408         .ops = &ad193x_dai_ops,
 409 };
 410 EXPORT_SYMBOL_GPL(ad193x_dai);
 411
 412 static int ad193x_probe(struct platform_device *pdev)
 413 {
 414         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 415         struct snd_soc_codec *codec;
 416         int ret = 0;
 417
 418         if (ad193x_codec == NULL) {
 419                 dev_err(&pdev->dev, "Codec device not registered\n");
 420                 return -ENODEV;
 421         }
 422
 423         socdev->card->codec = ad193x_codec;
 424         codec = ad193x_codec;
 425
 426         /* register pcms */
 427         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 428         if (ret < 0) {
 429                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 430                 goto pcm_err;
 431         }
 432
 433         snd_soc_add_controls(codec, ad193x_snd_controls,
 434                              ARRAY_SIZE(ad193x_snd_controls));
 435         snd_soc_dapm_new_controls(codec, ad193x_dapm_widgets,
 436                                   ARRAY_SIZE(ad193x_dapm_widgets));
 437         snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
 438
 439 pcm_err:
 440         return ret;
 441 }
 442
 443 /* power down chip */
 444 static int ad193x_remove(struct platform_device *pdev)
 445 {
 446         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 447
 448         snd_soc_free_pcms(socdev);
 449         snd_soc_dapm_free(socdev);
 450
 451         return 0;
 452 }
 453
 454 struct snd_soc_codec_device soc_codec_dev_ad193x = {
 455         .probe =        ad193x_probe,
 456         .remove =       ad193x_remove,
 457 };
 458 EXPORT_SYMBOL_GPL(soc_codec_dev_ad193x);
 459
 460 #if defined(CONFIG_SPI_MASTER)
 461 static int __devinit ad193x_spi_probe(struct spi_device *spi)
 462 {
 463         return ad193x_bus_probe(&spi->dev, spi, SND_SOC_SPI);
 464 }
 465
 466 static int __devexit ad193x_spi_remove(struct spi_device *spi)
 467 {
 468         return ad193x_bus_remove(&spi->dev);
 469 }
 470
 471 static struct spi_driver ad193x_spi_driver = {
 472         .driver = {
 473                 .name   = "ad193x",
 474                 .owner  = THIS_MODULE,
 475         },
 476         .probe          = ad193x_spi_probe,
 477         .remove         = __devexit_p(ad193x_spi_remove),
 478 };
 479 #endif
 480
 481 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 482 static const struct i2c_device_id ad193x_id[] = {
 483         { "ad1936", 0 },
 484         { "ad1937", 0 },
 485         { }
 486 };
 487 MODULE_DEVICE_TABLE(i2c, ad193x_id);
 488
 489 static int __devinit ad193x_i2c_probe(struct i2c_client *client,
 490                 const struct i2c_device_id *id)
 491 {
 492         return ad193x_bus_probe(&client->dev, client, SND_SOC_I2C);
 493 }
 494
 495 static int __devexit ad193x_i2c_remove(struct i2c_client *client)
 496 {
 497         return ad193x_bus_remove(&client->dev);
 498 }
 499
 500 static struct i2c_driver ad193x_i2c_driver = {
 501         .driver = {
 502                 .name = "ad193x",
 503         },
 504         .probe    = ad193x_i2c_probe,
 505         .remove   = __devexit_p(ad193x_i2c_remove),
 506         .id_table = ad193x_id,
 507 };
 508 #endif
 509
 510 static int __init ad193x_modinit(void)
 511 {
 512         int ret;
 513
 514 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 515         ret =  i2c_add_driver(&ad193x_i2c_driver);
 516         if (ret != 0) {
 517                 printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
 518                                 ret);
 519         }
 520 #endif
 521
 522 #if defined(CONFIG_SPI_MASTER)
 523         ret = spi_register_driver(&ad193x_spi_driver);
 524         if (ret != 0) {
 525                 printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
 526                                 ret);
 527         }
 528 #endif
 529         return ret;
 530 }
 531 module_init(ad193x_modinit);
 532
 533 static void __exit ad193x_modexit(void)
 534 {
 535 #if defined(CONFIG_SPI_MASTER)
 536         spi_unregister_driver(&ad193x_spi_driver);
 537 #endif
 538
 539 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 540         i2c_del_driver(&ad193x_i2c_driver);
 541 #endif
 542 }
 543 module_exit(ad193x_modexit);
 544
 545 MODULE_DESCRIPTION("ASoC ad193x driver");
 546 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 547 MODULE_LICENSE("GPL");