sound/soc/codecs/cs4271.c

   1 /*
   2  * CS4271 ASoC codec driver
   3  *
   4  * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * This driver support CS4271 codec being master or slave, working
  17  * in control port mode, connected either via SPI or I2C.
  18  * The data format accepted is I2S or left-justified.
  19  * DAPM support not implemented.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/slab.h>
  24 #include <linux/delay.h>
  25 #include <sound/pcm.h>
  26 #include <sound/soc.h>
  27 #include <sound/tlv.h>
  28 #include <linux/gpio.h>
  29 #include <linux/i2c.h>
  30 #include <linux/spi/spi.h>
  31 #include <sound/cs4271.h>
  32
  33 #define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
  34                             SNDRV_PCM_FMTBIT_S24_LE | \
  35                             SNDRV_PCM_FMTBIT_S32_LE)
  36
  37 /*
  38  * CS4271 registers
  39  * High byte represents SPI chip address (0x10) + write command (0)
  40  * Low byte - codec register address
  41  */
  42 #define CS4271_MODE1    0x2001  /* Mode Control 1 */
  43 #define CS4271_DACCTL   0x2002  /* DAC Control */
  44 #define CS4271_DACVOL   0x2003  /* DAC Volume & Mixing Control */
  45 #define CS4271_VOLA     0x2004  /* DAC Channel A Volume Control */
  46 #define CS4271_VOLB     0x2005  /* DAC Channel B Volume Control */
  47 #define CS4271_ADCCTL   0x2006  /* ADC Control */
  48 #define CS4271_MODE2    0x2007  /* Mode Control 2 */
  49 #define CS4271_CHIPID   0x2008  /* Chip ID */
  50
  51 #define CS4271_FIRSTREG CS4271_MODE1
  52 #define CS4271_LASTREG  CS4271_MODE2
  53 #define CS4271_NR_REGS  ((CS4271_LASTREG & 0xFF) + 1)
  54
  55 /* Bit masks for the CS4271 registers */
  56 #define CS4271_MODE1_MODE_MASK  0xC0
  57 #define CS4271_MODE1_MODE_1X    0x00
  58 #define CS4271_MODE1_MODE_2X    0x80
  59 #define CS4271_MODE1_MODE_4X    0xC0
  60
  61 #define CS4271_MODE1_DIV_MASK   0x30
  62 #define CS4271_MODE1_DIV_1      0x00
  63 #define CS4271_MODE1_DIV_15     0x10
  64 #define CS4271_MODE1_DIV_2      0x20
  65 #define CS4271_MODE1_DIV_3      0x30
  66
  67 #define CS4271_MODE1_MASTER     0x08
  68
  69 #define CS4271_MODE1_DAC_DIF_MASK       0x07
  70 #define CS4271_MODE1_DAC_DIF_LJ         0x00
  71 #define CS4271_MODE1_DAC_DIF_I2S        0x01
  72 #define CS4271_MODE1_DAC_DIF_RJ16       0x02
  73 #define CS4271_MODE1_DAC_DIF_RJ24       0x03
  74 #define CS4271_MODE1_DAC_DIF_RJ20       0x04
  75 #define CS4271_MODE1_DAC_DIF_RJ18       0x05
  76
  77 #define CS4271_DACCTL_AMUTE     0x80
  78 #define CS4271_DACCTL_IF_SLOW   0x40
  79
  80 #define CS4271_DACCTL_DEM_MASK  0x30
  81 #define CS4271_DACCTL_DEM_DIS   0x00
  82 #define CS4271_DACCTL_DEM_441   0x10
  83 #define CS4271_DACCTL_DEM_48    0x20
  84 #define CS4271_DACCTL_DEM_32    0x30
  85
  86 #define CS4271_DACCTL_SVRU      0x08
  87 #define CS4271_DACCTL_SRD       0x04
  88 #define CS4271_DACCTL_INVA      0x02
  89 #define CS4271_DACCTL_INVB      0x01
  90
  91 #define CS4271_DACVOL_BEQUA     0x40
  92 #define CS4271_DACVOL_SOFT      0x20
  93 #define CS4271_DACVOL_ZEROC     0x10
  94
  95 #define CS4271_DACVOL_ATAPI_MASK        0x0F
  96 #define CS4271_DACVOL_ATAPI_M_M         0x00
  97 #define CS4271_DACVOL_ATAPI_M_BR        0x01
  98 #define CS4271_DACVOL_ATAPI_M_BL        0x02
  99 #define CS4271_DACVOL_ATAPI_M_BLR2      0x03
 100 #define CS4271_DACVOL_ATAPI_AR_M        0x04
 101 #define CS4271_DACVOL_ATAPI_AR_BR       0x05
 102 #define CS4271_DACVOL_ATAPI_AR_BL       0x06
 103 #define CS4271_DACVOL_ATAPI_AR_BLR2     0x07
 104 #define CS4271_DACVOL_ATAPI_AL_M        0x08
 105 #define CS4271_DACVOL_ATAPI_AL_BR       0x09
 106 #define CS4271_DACVOL_ATAPI_AL_BL       0x0A
 107 #define CS4271_DACVOL_ATAPI_AL_BLR2     0x0B
 108 #define CS4271_DACVOL_ATAPI_ALR2_M      0x0C
 109 #define CS4271_DACVOL_ATAPI_ALR2_BR     0x0D
 110 #define CS4271_DACVOL_ATAPI_ALR2_BL     0x0E
 111 #define CS4271_DACVOL_ATAPI_ALR2_BLR2   0x0F
 112
 113 #define CS4271_VOLA_MUTE        0x80
 114 #define CS4271_VOLA_VOL_MASK    0x7F
 115 #define CS4271_VOLB_MUTE        0x80
 116 #define CS4271_VOLB_VOL_MASK    0x7F
 117
 118 #define CS4271_ADCCTL_DITHER16  0x20
 119
 120 #define CS4271_ADCCTL_ADC_DIF_MASK      0x10
 121 #define CS4271_ADCCTL_ADC_DIF_LJ        0x00
 122 #define CS4271_ADCCTL_ADC_DIF_I2S       0x10
 123
 124 #define CS4271_ADCCTL_MUTEA     0x08
 125 #define CS4271_ADCCTL_MUTEB     0x04
 126 #define CS4271_ADCCTL_HPFDA     0x02
 127 #define CS4271_ADCCTL_HPFDB     0x01
 128
 129 #define CS4271_MODE2_LOOP       0x10
 130 #define CS4271_MODE2_MUTECAEQUB 0x08
 131 #define CS4271_MODE2_FREEZE     0x04
 132 #define CS4271_MODE2_CPEN       0x02
 133 #define CS4271_MODE2_PDN        0x01
 134
 135 #define CS4271_CHIPID_PART_MASK 0xF0
 136 #define CS4271_CHIPID_REV_MASK  0x0F
 137
 138 /*
 139  * Default CS4271 power-up configuration
 140  * Array contains non-existing in hw register at address 0
 141  * Array do not include Chip ID, as codec driver does not use
 142  * registers read operations at all
 143  */
 144 static const u8 cs4271_dflt_reg[CS4271_NR_REGS] = {
 145         0,
 146         0,
 147         CS4271_DACCTL_AMUTE,
 148         CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR,
 149         0,
 150         0,
 151         0,
 152         0,
 153 };
 154
 155 struct cs4271_private {
 156         /* SND_SOC_I2C or SND_SOC_SPI */
 157         enum snd_soc_control_type       bus_type;
 158         void                            *control_data;
 159         unsigned int                    mclk;
 160         bool                            master;
 161         bool                            deemph;
 162         /* Current sample rate for de-emphasis control */
 163         int                             rate;
 164         /* GPIO driving Reset pin, if any */
 165         int                             gpio_nreset;
 166         /* GPIO that disable serial bus, if any */
 167         int                             gpio_disable;
 168 };
 169
 170 struct cs4271_clk_cfg {
 171         unsigned int    ratio;          /* MCLK / sample rate */
 172         u8              speed_mode;     /* codec speed mode: 1x, 2x, 4x */
 173         u8              mclk_master;    /* ratio bit mask for Master mode */
 174         u8              mclk_slave;     /* ratio bit mask for Slave mode */
 175 };
 176
 177 static struct cs4271_clk_cfg cs4271_clk_tab[] = {
 178         {64,   CS4271_MODE1_MODE_4X, CS4271_MODE1_DIV_1,  CS4271_MODE1_DIV_1},
 179         {96,   CS4271_MODE1_MODE_4X, CS4271_MODE1_DIV_15, CS4271_MODE1_DIV_1},
 180         {128,  CS4271_MODE1_MODE_2X, CS4271_MODE1_DIV_1,  CS4271_MODE1_DIV_1},
 181         {192,  CS4271_MODE1_MODE_2X, CS4271_MODE1_DIV_15, CS4271_MODE1_DIV_1},
 182         {256,  CS4271_MODE1_MODE_1X, CS4271_MODE1_DIV_1,  CS4271_MODE1_DIV_1},
 183         {384,  CS4271_MODE1_MODE_1X, CS4271_MODE1_DIV_15, CS4271_MODE1_DIV_1},
 184         {512,  CS4271_MODE1_MODE_1X, CS4271_MODE1_DIV_2,  CS4271_MODE1_DIV_1},
 185         {768,  CS4271_MODE1_MODE_1X, CS4271_MODE1_DIV_3,  CS4271_MODE1_DIV_3},
 186         {1024, CS4271_MODE1_MODE_1X, CS4271_MODE1_DIV_3,  CS4271_MODE1_DIV_3}
 187 };
 188
 189 #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
 190
 191 /*
 192  * @freq is the desired MCLK rate
 193  * MCLK rate should (c) be the sample rate, multiplied by one of the
 194  * ratios listed in cs4271_mclk_fs_ratios table
 195  */
 196 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 197                                  int clk_id, unsigned int freq, int dir)
 198 {
 199         struct snd_soc_codec *codec = codec_dai->codec;
 200         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 201
 202         cs4271->mclk = freq;
 203         return 0;
 204 }
 205
 206 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
 207                               unsigned int format)
 208 {
 209         struct snd_soc_codec *codec = codec_dai->codec;
 210         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 211         unsigned int val = 0;
 212         int ret;
 213
 214         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 215         case SND_SOC_DAIFMT_CBS_CFS:
 216                 cs4271->master = 0;
 217                 break;
 218         case SND_SOC_DAIFMT_CBM_CFM:
 219                 cs4271->master = 1;
 220                 val |= CS4271_MODE1_MASTER;
 221                 break;
 222         default:
 223                 dev_err(codec->dev, "Invalid DAI format\n");
 224                 return -EINVAL;
 225         }
 226
 227         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 228         case SND_SOC_DAIFMT_LEFT_J:
 229                 val |= CS4271_MODE1_DAC_DIF_LJ;
 230                 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
 231                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
 232                 if (ret < 0)
 233                         return ret;
 234                 break;
 235         case SND_SOC_DAIFMT_I2S:
 236                 val |= CS4271_MODE1_DAC_DIF_I2S;
 237                 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
 238                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
 239                 if (ret < 0)
 240                         return ret;
 241                 break;
 242         default:
 243                 dev_err(codec->dev, "Invalid DAI format\n");
 244                 return -EINVAL;
 245         }
 246
 247         ret = snd_soc_update_bits(codec, CS4271_MODE1,
 248                 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
 249         if (ret < 0)
 250                 return ret;
 251         return 0;
 252 }
 253
 254 static int cs4271_deemph[] = {0, 44100, 48000, 32000};
 255
 256 static int cs4271_set_deemph(struct snd_soc_codec *codec)
 257 {
 258         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 259         int i, ret;
 260         int val = CS4271_DACCTL_DEM_DIS;
 261
 262         if (cs4271->deemph) {
 263                 /* Find closest de-emphasis freq */
 264                 val = 1;
 265                 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
 266                         if (abs(cs4271_deemph[i] - cs4271->rate) <
 267                             abs(cs4271_deemph[val] - cs4271->rate))
 268                                 val = i;
 269                 val <<= 4;
 270         }
 271
 272         ret = snd_soc_update_bits(codec, CS4271_DACCTL,
 273                 CS4271_DACCTL_DEM_MASK, val);
 274         if (ret < 0)
 275                 return ret;
 276         return 0;
 277 }
 278
 279 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
 280                              struct snd_ctl_elem_value *ucontrol)
 281 {
 282         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 283         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 284
 285         ucontrol->value.enumerated.item[0] = cs4271->deemph;
 286         return 0;
 287 }
 288
 289 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
 290                              struct snd_ctl_elem_value *ucontrol)
 291 {
 292         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 293         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 294
 295         cs4271->deemph = ucontrol->value.enumerated.item[0];
 296         return cs4271_set_deemph(codec);
 297 }
 298
 299 static int cs4271_hw_params(struct snd_pcm_substream *substream,
 300                             struct snd_pcm_hw_params *params,
 301                             struct snd_soc_dai *dai)
 302 {
 303         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 304         struct snd_soc_codec *codec = rtd->codec;
 305         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 306         int i, ret;
 307         unsigned int ratio, val;
 308
 309         cs4271->rate = params_rate(params);
 310         ratio = cs4271->mclk / cs4271->rate;
 311         for (i = 0; i < CS4171_NR_RATIOS; i++)
 312                 if (cs4271_clk_tab[i].ratio == ratio)
 313                         break;
 314
 315         if ((i == CS4171_NR_RATIOS) || ((ratio == 1024) && cs4271->master)) {
 316                 dev_err(codec->dev, "Invalid sample rate\n");
 317                 return -EINVAL;
 318         }
 319
 320         /* Configure DAC */
 321         val = cs4271_clk_tab[i].speed_mode;
 322
 323         if (cs4271->master)
 324                 val |= cs4271_clk_tab[i].mclk_master;
 325         else
 326                 val |= cs4271_clk_tab[i].mclk_slave;
 327
 328         ret = snd_soc_update_bits(codec, CS4271_MODE1,
 329                 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
 330         if (ret < 0)
 331                 return ret;
 332
 333         return cs4271_set_deemph(codec);
 334 }
 335
 336 static int cs4271_digital_mute(struct snd_soc_dai *dai, int mute)
 337 {
 338         struct snd_soc_codec *codec = dai->codec;
 339         int ret;
 340         int val_a = 0;
 341         int val_b = 0;
 342
 343         if (mute) {
 344                 val_a = CS4271_VOLA_MUTE;
 345                 val_b = CS4271_VOLB_MUTE;
 346         }
 347
 348         ret = snd_soc_update_bits(codec, CS4271_VOLA, CS4271_VOLA_MUTE, val_a);
 349         if (ret < 0)
 350                 return ret;
 351         ret = snd_soc_update_bits(codec, CS4271_VOLB, CS4271_VOLB_MUTE, val_b);
 352         if (ret < 0)
 353                 return ret;
 354
 355         return 0;
 356 }
 357
 358 /* CS4271 controls */
 359 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
 360
 361 static const struct snd_kcontrol_new cs4271_snd_controls[] = {
 362         SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
 363                 0, 0x7F, 1, cs4271_dac_tlv),
 364         SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
 365         SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
 366         SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
 367         SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
 368                 cs4271_get_deemph, cs4271_put_deemph),
 369         SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
 370         SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
 371         SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
 372         SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
 373         SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
 374         SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
 375         SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
 376         SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
 377         SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
 378         SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
 379                 7, 1, 1),
 380 };
 381
 382 static struct snd_soc_dai_ops cs4271_dai_ops = {
 383         .hw_params      = cs4271_hw_params,
 384         .set_sysclk     = cs4271_set_dai_sysclk,
 385         .set_fmt        = cs4271_set_dai_fmt,
 386         .digital_mute   = cs4271_digital_mute,
 387 };
 388
 389 static struct snd_soc_dai_driver cs4271_dai = {
 390         .name = "cs4271-hifi",
 391         .playback = {
 392                 .stream_name    = "Playback",
 393                 .channels_min   = 2,
 394                 .channels_max   = 2,
 395                 .rates          = SNDRV_PCM_RATE_8000_96000,
 396                 .formats        = CS4271_PCM_FORMATS,
 397         },
 398         .capture = {
 399                 .stream_name    = "Capture",
 400                 .channels_min   = 2,
 401                 .channels_max   = 2,
 402                 .rates          = SNDRV_PCM_RATE_8000_96000,
 403                 .formats        = CS4271_PCM_FORMATS,
 404         },
 405         .ops = &cs4271_dai_ops,
 406         .symmetric_rates = 1,
 407 };
 408
 409 #ifdef CONFIG_PM
 410 static int cs4271_soc_suspend(struct snd_soc_codec *codec, pm_message_t mesg)
 411 {
 412         int ret;
 413         /* Set power-down bit */
 414         ret = snd_soc_update_bits(codec, CS4271_MODE2, 0, CS4271_MODE2_PDN);
 415         if (ret < 0)
 416                 return ret;
 417         return 0;
 418 }
 419
 420 static int cs4271_soc_resume(struct snd_soc_codec *codec)
 421 {
 422         int ret;
 423         /* Restore codec state */
 424         ret = snd_soc_cache_sync(codec);
 425         if (ret < 0)
 426                 return ret;
 427         /* then disable the power-down bit */
 428         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
 429         if (ret < 0)
 430                 return ret;
 431         return 0;
 432 }
 433 #else
 434 #define cs4271_soc_suspend      NULL
 435 #define cs4271_soc_resume       NULL
 436 #endif /* CONFIG_PM */
 437
 438 static int cs4271_probe(struct snd_soc_codec *codec)
 439 {
 440         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 441         struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
 442         int ret;
 443         int gpio_nreset = -EINVAL;
 444
 445         codec->control_data = cs4271->control_data;
 446
 447         if (cs4271plat && gpio_is_valid(cs4271plat->gpio_nreset))
 448                 gpio_nreset = cs4271plat->gpio_nreset;
 449
 450         if (gpio_nreset >= 0)
 451                 if (gpio_request(gpio_nreset, "CS4271 Reset"))
 452                         gpio_nreset = -EINVAL;
 453         if (gpio_nreset >= 0) {
 454                 /* Reset codec */
 455                 gpio_direction_output(gpio_nreset, 0);
 456                 udelay(1);
 457                 gpio_set_value(gpio_nreset, 1);
 458                 /* Give the codec time to wake up */
 459                 udelay(1);
 460         }
 461
 462         cs4271->gpio_nreset = gpio_nreset;
 463
 464         /*
 465          * In case of I2C, chip address specified in board data.
 466          * So cache IO operations use 8 bit codec register address.
 467          * In case of SPI, chip address and register address
 468          * passed together as 16 bit value.
 469          * Anyway, register address is masked with 0xFF inside
 470          * soc-cache code.
 471          */
 472         if (cs4271->bus_type == SND_SOC_SPI)
 473                 ret = snd_soc_codec_set_cache_io(codec, 16, 8,
 474                         cs4271->bus_type);
 475         else
 476                 ret = snd_soc_codec_set_cache_io(codec, 8, 8,
 477                         cs4271->bus_type);
 478         if (ret) {
 479                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 480                 return ret;
 481         }
 482
 483         ret = snd_soc_update_bits(codec, CS4271_MODE2, 0,
 484                 CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
 485         if (ret < 0)
 486                 return ret;
 487         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
 488         if (ret < 0)
 489                 return ret;
 490         /* Power-up sequence requires 85 uS */
 491         udelay(85);
 492
 493         return snd_soc_add_controls(codec, cs4271_snd_controls,
 494                 ARRAY_SIZE(cs4271_snd_controls));
 495 }
 496
 497 static int cs4271_remove(struct snd_soc_codec *codec)
 498 {
 499         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 500         int gpio_nreset;
 501
 502         gpio_nreset = cs4271->gpio_nreset;
 503
 504         if (gpio_is_valid(gpio_nreset)) {
 505                 /* Set codec to the reset state */
 506                 gpio_set_value(gpio_nreset, 0);
 507                 gpio_free(gpio_nreset);
 508         }
 509
 510         return 0;
 511 };
 512
 513 static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
 514         .probe                  = cs4271_probe,
 515         .remove                 = cs4271_remove,
 516         .suspend                = cs4271_soc_suspend,
 517         .resume                 = cs4271_soc_resume,
 518         .reg_cache_default      = cs4271_dflt_reg,
 519         .reg_cache_size         = ARRAY_SIZE(cs4271_dflt_reg),
 520         .reg_word_size          = sizeof(cs4271_dflt_reg[0]),
 521         .compress_type          = SND_SOC_FLAT_COMPRESSION,
 522 };
 523
 524 #if defined(CONFIG_SPI_MASTER)
 525 static int __devinit cs4271_spi_probe(struct spi_device *spi)
 526 {
 527         struct cs4271_private *cs4271;
 528
 529         cs4271 = devm_kzalloc(&spi->dev, sizeof(*cs4271), GFP_KERNEL);
 530         if (!cs4271)
 531                 return -ENOMEM;
 532
 533         spi_set_drvdata(spi, cs4271);
 534         cs4271->control_data = spi;
 535         cs4271->bus_type = SND_SOC_SPI;
 536
 537         return snd_soc_register_codec(&spi->dev, &soc_codec_dev_cs4271,
 538                 &cs4271_dai, 1);
 539 }
 540
 541 static int __devexit cs4271_spi_remove(struct spi_device *spi)
 542 {
 543         snd_soc_unregister_codec(&spi->dev);
 544         return 0;
 545 }
 546
 547 static struct spi_driver cs4271_spi_driver = {
 548         .driver = {
 549                 .name   = "cs4271",
 550                 .owner  = THIS_MODULE,
 551         },
 552         .probe          = cs4271_spi_probe,
 553         .remove         = __devexit_p(cs4271_spi_remove),
 554 };
 555 #endif /* defined(CONFIG_SPI_MASTER) */
 556
 557 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 558 static struct i2c_device_id cs4271_i2c_id[] = {
 559         {"cs4271", 0},
 560         {}
 561 };
 562 MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id);
 563
 564 static int __devinit cs4271_i2c_probe(struct i2c_client *client,
 565                                       const struct i2c_device_id *id)
 566 {
 567         struct cs4271_private *cs4271;
 568
 569         cs4271 = devm_kzalloc(&client->dev, sizeof(*cs4271), GFP_KERNEL);
 570         if (!cs4271)
 571                 return -ENOMEM;
 572
 573         i2c_set_clientdata(client, cs4271);
 574         cs4271->control_data = client;
 575         cs4271->bus_type = SND_SOC_I2C;
 576
 577         return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4271,
 578                 &cs4271_dai, 1);
 579 }
 580
 581 static int __devexit cs4271_i2c_remove(struct i2c_client *client)
 582 {
 583         snd_soc_unregister_codec(&client->dev);
 584         return 0;
 585 }
 586
 587 static struct i2c_driver cs4271_i2c_driver = {
 588         .driver = {
 589                 .name   = "cs4271",
 590                 .owner  = THIS_MODULE,
 591         },
 592         .id_table       = cs4271_i2c_id,
 593         .probe          = cs4271_i2c_probe,
 594         .remove         = __devexit_p(cs4271_i2c_remove),
 595 };
 596 #endif /* defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) */
 597
 598 /*
 599  * We only register our serial bus driver here without
 600  * assignment to particular chip. So if any of the below
 601  * fails, there is some problem with I2C or SPI subsystem.
 602  * In most cases this module will be compiled with support
 603  * of only one serial bus.
 604  */
 605 static int __init cs4271_modinit(void)
 606 {
 607         int ret;
 608
 609 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 610         ret = i2c_add_driver(&cs4271_i2c_driver);
 611         if (ret) {
 612                 pr_err("Failed to register CS4271 I2C driver: %d\n", ret);
 613                 return ret;
 614         }
 615 #endif
 616
 617 #if defined(CONFIG_SPI_MASTER)
 618         ret = spi_register_driver(&cs4271_spi_driver);
 619         if (ret) {
 620                 pr_err("Failed to register CS4271 SPI driver: %d\n", ret);
 621                 return ret;
 622         }
 623 #endif
 624
 625         return 0;
 626 }
 627 module_init(cs4271_modinit);
 628
 629 static void __exit cs4271_modexit(void)
 630 {
 631 #if defined(CONFIG_SPI_MASTER)
 632         spi_unregister_driver(&cs4271_spi_driver);
 633 #endif
 634
 635 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 636         i2c_del_driver(&cs4271_i2c_driver);
 637 #endif
 638 }
 639 module_exit(cs4271_modexit);
 640
 641 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
 642 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
 643 MODULE_LICENSE("GPL");