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         u8 reg_cache[AD193X_NUM_REGS];
  28         enum snd_soc_control_type bus_type;
  29         void *control_data;
  30         int sysclk;
  31 };
  32
  33 /* ad193x register cache & default register settings */
  34 static const u8 ad193x_reg[AD193X_NUM_REGS] = {
  35         0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
  36 };
  37
  38 /*
  39  * AD193X volume/mute/de-emphasis etc. controls
  40  */
  41 static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
  42
  43 static const struct soc_enum ad193x_deemp_enum =
  44         SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);
  45
  46 static const struct snd_kcontrol_new ad193x_snd_controls[] = {
  47         /* DAC volume control */
  48         SOC_DOUBLE_R("DAC1 Volume", AD193X_DAC_L1_VOL,
  49                         AD193X_DAC_R1_VOL, 0, 0xFF, 1),
  50         SOC_DOUBLE_R("DAC2 Volume", AD193X_DAC_L2_VOL,
  51                         AD193X_DAC_R2_VOL, 0, 0xFF, 1),
  52         SOC_DOUBLE_R("DAC3 Volume", AD193X_DAC_L3_VOL,
  53                         AD193X_DAC_R3_VOL, 0, 0xFF, 1),
  54         SOC_DOUBLE_R("DAC4 Volume", AD193X_DAC_L4_VOL,
  55                         AD193X_DAC_R4_VOL, 0, 0xFF, 1),
  56
  57         /* ADC switch control */
  58         SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
  59                 AD193X_ADCR1_MUTE, 1, 1),
  60         SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
  61                 AD193X_ADCR2_MUTE, 1, 1),
  62
  63         /* DAC switch control */
  64         SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
  65                 AD193X_DACR1_MUTE, 1, 1),
  66         SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
  67                 AD193X_DACR2_MUTE, 1, 1),
  68         SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
  69                 AD193X_DACR3_MUTE, 1, 1),
  70         SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
  71                 AD193X_DACR4_MUTE, 1, 1),
  72
  73         /* ADC high-pass filter */
  74         SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
  75                         AD193X_ADC_HIGHPASS_FILTER, 1, 0),
  76
  77         /* DAC de-emphasis */
  78         SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
  79 };
  80
  81 static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
  82         SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
  83         SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
  84         SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
  85         SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
  86         SND_SOC_DAPM_OUTPUT("DAC1OUT"),
  87         SND_SOC_DAPM_OUTPUT("DAC2OUT"),
  88         SND_SOC_DAPM_OUTPUT("DAC3OUT"),
  89         SND_SOC_DAPM_OUTPUT("DAC4OUT"),
  90         SND_SOC_DAPM_INPUT("ADC1IN"),
  91         SND_SOC_DAPM_INPUT("ADC2IN"),
  92 };
  93
  94 static const struct snd_soc_dapm_route audio_paths[] = {
  95         { "DAC", NULL, "PLL_PWR" },
  96         { "ADC", NULL, "PLL_PWR" },
  97         { "DAC", NULL, "ADC_PWR" },
  98         { "ADC", NULL, "ADC_PWR" },
  99         { "DAC1OUT", "DAC1 Switch", "DAC" },
 100         { "DAC2OUT", "DAC2 Switch", "DAC" },
 101         { "DAC3OUT", "DAC3 Switch", "DAC" },
 102         { "DAC4OUT", "DAC4 Switch", "DAC" },
 103         { "ADC", "ADC1 Switch", "ADC1IN" },
 104         { "ADC", "ADC2 Switch", "ADC2IN" },
 105 };
 106
 107 /*
 108  * DAI ops entries
 109  */
 110
 111 static int ad193x_mute(struct snd_soc_dai *dai, int mute)
 112 {
 113         struct snd_soc_codec *codec = dai->codec;
 114         int reg;
 115
 116         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 117         reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
 118                 (~AD193X_DAC_MASTER_MUTE);
 119         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 120
 121         return 0;
 122 }
 123
 124 static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 125                                unsigned int rx_mask, int slots, int width)
 126 {
 127         struct snd_soc_codec *codec = dai->codec;
 128         int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
 129         int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
 130
 131         dac_reg &= ~AD193X_DAC_CHAN_MASK;
 132         adc_reg &= ~AD193X_ADC_CHAN_MASK;
 133
 134         switch (slots) {
 135         case 2:
 136                 dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
 137                 adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
 138                 break;
 139         case 4:
 140                 dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
 141                 adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
 142                 break;
 143         case 8:
 144                 dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
 145                 adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
 146                 break;
 147         case 16:
 148                 dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
 149                 adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
 150                 break;
 151         default:
 152                 return -EINVAL;
 153         }
 154
 155         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 156         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
 157
 158         return 0;
 159 }
 160
 161 static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 162                 unsigned int fmt)
 163 {
 164         struct snd_soc_codec *codec = codec_dai->codec;
 165         int adc_reg1, adc_reg2, dac_reg;
 166
 167         adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
 168         adc_reg2 = 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_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 177                 adc_reg1 |= AD193X_ADC_SERFMT_TDM;
 178                 break;
 179         case SND_SOC_DAIFMT_DSP_A:
 180                 adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
 181                 adc_reg1 |= 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_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_NB_IF: /* normal bclk + invert 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         case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
 201                 adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
 202                 adc_reg2 |= 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_reg2 |= AD193X_ADC_LEFT_HIGH;
 209                 adc_reg2 |= 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_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_CBS_CFM: /* codec clk slave & frm master */
 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_CBM_CFS: /* codec clk master & frame 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         case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
 237                 adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
 238                 adc_reg2 &= ~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_CTRL1, adc_reg1);
 247         snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
 248         snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
 249
 250         return 0;
 251 }
 252
 253 static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 254                 int clk_id, unsigned int freq, int dir)
 255 {
 256         struct snd_soc_codec *codec = codec_dai->codec;
 257         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 258         switch (freq) {
 259         case 12288000:
 260         case 18432000:
 261         case 24576000:
 262         case 36864000:
 263                 ad193x->sysclk = freq;
 264                 return 0;
 265         }
 266         return -EINVAL;
 267 }
 268
 269 static int ad193x_hw_params(struct snd_pcm_substream *substream,
 270                 struct snd_pcm_hw_params *params,
 271                 struct snd_soc_dai *dai)
 272 {
 273         int word_len = 0, reg = 0, master_rate = 0;
 274
 275         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 276         struct snd_soc_codec *codec = rtd->codec;
 277         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 278
 279         /* bit size */
 280         switch (params_format(params)) {
 281         case SNDRV_PCM_FORMAT_S16_LE:
 282                 word_len = 3;
 283                 break;
 284         case SNDRV_PCM_FORMAT_S20_3LE:
 285                 word_len = 1;
 286                 break;
 287         case SNDRV_PCM_FORMAT_S24_LE:
 288         case SNDRV_PCM_FORMAT_S32_LE:
 289                 word_len = 0;
 290                 break;
 291         }
 292
 293         switch (ad193x->sysclk) {
 294         case 12288000:
 295                 master_rate = AD193X_PLL_INPUT_256;
 296                 break;
 297         case 18432000:
 298                 master_rate = AD193X_PLL_INPUT_384;
 299                 break;
 300         case 24576000:
 301                 master_rate = AD193X_PLL_INPUT_512;
 302                 break;
 303         case 36864000:
 304                 master_rate = AD193X_PLL_INPUT_768;
 305                 break;
 306         }
 307
 308         reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
 309         reg = (reg & AD193X_PLL_INPUT_MASK) | master_rate;
 310         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);
 311
 312         reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
 313         reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
 314         snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 315
 316         reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
 317         reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
 318         snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
 319
 320         return 0;
 321 }
 322
 323 static struct snd_soc_dai_ops ad193x_dai_ops = {
 324         .hw_params = ad193x_hw_params,
 325         .digital_mute = ad193x_mute,
 326         .set_tdm_slot = ad193x_set_tdm_slot,
 327         .set_sysclk     = ad193x_set_dai_sysclk,
 328         .set_fmt = ad193x_set_dai_fmt,
 329 };
 330
 331 /* codec DAI instance */
 332 static struct snd_soc_dai_driver ad193x_dai = {
 333         .name = "ad193x-hifi",
 334         .playback = {
 335                 .stream_name = "Playback",
 336                 .channels_min = 2,
 337                 .channels_max = 8,
 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         .capture = {
 343                 .stream_name = "Capture",
 344                 .channels_min = 2,
 345                 .channels_max = 4,
 346                 .rates = SNDRV_PCM_RATE_48000,
 347                 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
 348                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
 349         },
 350         .ops = &ad193x_dai_ops,
 351 };
 352
 353 static int ad193x_probe(struct snd_soc_codec *codec)
 354 {
 355         struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 356         int ret;
 357
 358         codec->control_data = ad193x->control_data;
 359         if (ad193x->bus_type == SND_SOC_I2C)
 360                 ret = snd_soc_codec_set_cache_io(codec, 8, 8, ad193x->bus_type);
 361         else
 362                 ret = snd_soc_codec_set_cache_io(codec, 16, 8, ad193x->bus_type);
 363         if (ret < 0) {
 364                 dev_err(codec->dev, "failed to set cache I/O: %d\n",
 365                                 ret);
 366                 kfree(ad193x);
 367                 return ret;
 368         }
 369
 370         /* default setting for ad193x */
 371
 372         /* unmute dac channels */
 373         snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
 374         /* de-emphasis: 48kHz, powedown dac */
 375         snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
 376         /* powerdown dac, dac in tdm mode */
 377         snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
 378         /* high-pass filter enable */
 379         snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
 380         /* sata delay=1, adc aux mode */
 381         snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
 382         /* pll input: mclki/xi */
 383         snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
 384         snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
 385
 386         snd_soc_add_controls(codec, ad193x_snd_controls,
 387                              ARRAY_SIZE(ad193x_snd_controls));
 388         snd_soc_dapm_new_controls(codec, ad193x_dapm_widgets,
 389                                   ARRAY_SIZE(ad193x_dapm_widgets));
 390         snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
 391
 392         return ret;
 393 }
 394
 395 static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
 396         .probe =        ad193x_probe,
 397         .reg_cache_default = ad193x_reg,
 398         .reg_cache_size = AD193X_NUM_REGS,
 399         .reg_word_size = sizeof(u16),
 400 };
 401
 402 #if defined(CONFIG_SPI_MASTER)
 403 static int __devinit ad193x_spi_probe(struct spi_device *spi)
 404 {
 405         struct ad193x_priv *ad193x;
 406         int ret;
 407
 408         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 409         if (ad193x == NULL)
 410                 return -ENOMEM;
 411
 412         spi_set_drvdata(spi, ad193x);
 413         ad193x->control_data = spi;
 414         ad193x->bus_type = SND_SOC_SPI;
 415
 416         ret = snd_soc_register_codec(&spi->dev,
 417                         &soc_codec_dev_ad193x, &ad193x_dai, 1);
 418         if (ret < 0)
 419                 kfree(ad193x);
 420         return ret;
 421 }
 422
 423 static int __devexit ad193x_spi_remove(struct spi_device *spi)
 424 {
 425         snd_soc_unregister_codec(&spi->dev);
 426         kfree(spi_get_drvdata(spi));
 427         return 0;
 428 }
 429
 430 static struct spi_driver ad193x_spi_driver = {
 431         .driver = {
 432                 .name   = "ad193x-codec",
 433                 .owner  = THIS_MODULE,
 434         },
 435         .probe          = ad193x_spi_probe,
 436         .remove         = __devexit_p(ad193x_spi_remove),
 437 };
 438 #endif
 439
 440 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 441 static const struct i2c_device_id ad193x_id[] = {
 442         { "ad1936", 0 },
 443         { "ad1937", 0 },
 444         { }
 445 };
 446 MODULE_DEVICE_TABLE(i2c, ad193x_id);
 447
 448 static int __devinit ad193x_i2c_probe(struct i2c_client *client,
 449                 const struct i2c_device_id *id)
 450 {
 451         struct ad193x_priv *ad193x;
 452         int ret;
 453
 454         ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
 455         if (ad193x == NULL)
 456                 return -ENOMEM;
 457
 458         i2c_set_clientdata(client, ad193x);
 459         ad193x->control_data = client;
 460         ad193x->bus_type = SND_SOC_I2C;
 461
 462         ret =  snd_soc_register_codec(&client->dev,
 463                         &soc_codec_dev_ad193x, &ad193x_dai, 1);
 464         if (ret < 0)
 465                 kfree(ad193x);
 466         return ret;
 467 }
 468
 469 static int __devexit ad193x_i2c_remove(struct i2c_client *client)
 470 {
 471         snd_soc_unregister_codec(&client->dev);
 472         kfree(i2c_get_clientdata(client));
 473         return 0;
 474 }
 475
 476 static struct i2c_driver ad193x_i2c_driver = {
 477         .driver = {
 478                 .name = "ad193x-codec",
 479         },
 480         .probe    = ad193x_i2c_probe,
 481         .remove   = __devexit_p(ad193x_i2c_remove),
 482         .id_table = ad193x_id,
 483 };
 484 #endif
 485
 486 static int __init ad193x_modinit(void)
 487 {
 488         int ret;
 489
 490 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 491         ret =  i2c_add_driver(&ad193x_i2c_driver);
 492         if (ret != 0) {
 493                 printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
 494                                 ret);
 495         }
 496 #endif
 497
 498 #if defined(CONFIG_SPI_MASTER)
 499         ret = spi_register_driver(&ad193x_spi_driver);
 500         if (ret != 0) {
 501                 printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
 502                                 ret);
 503         }
 504 #endif
 505         return ret;
 506 }
 507 module_init(ad193x_modinit);
 508
 509 static void __exit ad193x_modexit(void)
 510 {
 511 #if defined(CONFIG_SPI_MASTER)
 512         spi_unregister_driver(&ad193x_spi_driver);
 513 #endif
 514
 515 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 516         i2c_del_driver(&ad193x_i2c_driver);
 517 #endif
 518 }
 519 module_exit(ad193x_modexit);
 520
 521 MODULE_DESCRIPTION("ASoC ad193x driver");
 522 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 523 MODULE_LICENSE("GPL");