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 #define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000
  37
  38 /*
  39  * CS4271 registers
  40  * High byte represents SPI chip address (0x10) + write command (0)
  41  * Low byte - codec register address
  42  */
  43 #define CS4271_MODE1    0x2001  /* Mode Control 1 */
  44 #define CS4271_DACCTL   0x2002  /* DAC Control */
  45 #define CS4271_DACVOL   0x2003  /* DAC Volume & Mixing Control */
  46 #define CS4271_VOLA     0x2004  /* DAC Channel A Volume Control */
  47 #define CS4271_VOLB     0x2005  /* DAC Channel B Volume Control */
  48 #define CS4271_ADCCTL   0x2006  /* ADC Control */
  49 #define CS4271_MODE2    0x2007  /* Mode Control 2 */
  50 #define CS4271_CHIPID   0x2008  /* Chip ID */
  51
  52 #define CS4271_FIRSTREG CS4271_MODE1
  53 #define CS4271_LASTREG  CS4271_MODE2
  54 #define CS4271_NR_REGS  ((CS4271_LASTREG & 0xFF) + 1)
  55
  56 /* Bit masks for the CS4271 registers */
  57 #define CS4271_MODE1_MODE_MASK  0xC0
  58 #define CS4271_MODE1_MODE_1X    0x00
  59 #define CS4271_MODE1_MODE_2X    0x80
  60 #define CS4271_MODE1_MODE_4X    0xC0
  61
  62 #define CS4271_MODE1_DIV_MASK   0x30
  63 #define CS4271_MODE1_DIV_1      0x00
  64 #define CS4271_MODE1_DIV_15     0x10
  65 #define CS4271_MODE1_DIV_2      0x20
  66 #define CS4271_MODE1_DIV_3      0x30
  67
  68 #define CS4271_MODE1_MASTER     0x08
  69
  70 #define CS4271_MODE1_DAC_DIF_MASK       0x07
  71 #define CS4271_MODE1_DAC_DIF_LJ         0x00
  72 #define CS4271_MODE1_DAC_DIF_I2S        0x01
  73 #define CS4271_MODE1_DAC_DIF_RJ16       0x02
  74 #define CS4271_MODE1_DAC_DIF_RJ24       0x03
  75 #define CS4271_MODE1_DAC_DIF_RJ20       0x04
  76 #define CS4271_MODE1_DAC_DIF_RJ18       0x05
  77
  78 #define CS4271_DACCTL_AMUTE     0x80
  79 #define CS4271_DACCTL_IF_SLOW   0x40
  80
  81 #define CS4271_DACCTL_DEM_MASK  0x30
  82 #define CS4271_DACCTL_DEM_DIS   0x00
  83 #define CS4271_DACCTL_DEM_441   0x10
  84 #define CS4271_DACCTL_DEM_48    0x20
  85 #define CS4271_DACCTL_DEM_32    0x30
  86
  87 #define CS4271_DACCTL_SVRU      0x08
  88 #define CS4271_DACCTL_SRD       0x04
  89 #define CS4271_DACCTL_INVA      0x02
  90 #define CS4271_DACCTL_INVB      0x01
  91
  92 #define CS4271_DACVOL_BEQUA     0x40
  93 #define CS4271_DACVOL_SOFT      0x20
  94 #define CS4271_DACVOL_ZEROC     0x10
  95
  96 #define CS4271_DACVOL_ATAPI_MASK        0x0F
  97 #define CS4271_DACVOL_ATAPI_M_M         0x00
  98 #define CS4271_DACVOL_ATAPI_M_BR        0x01
  99 #define CS4271_DACVOL_ATAPI_M_BL        0x02
 100 #define CS4271_DACVOL_ATAPI_M_BLR2      0x03
 101 #define CS4271_DACVOL_ATAPI_AR_M        0x04
 102 #define CS4271_DACVOL_ATAPI_AR_BR       0x05
 103 #define CS4271_DACVOL_ATAPI_AR_BL       0x06
 104 #define CS4271_DACVOL_ATAPI_AR_BLR2     0x07
 105 #define CS4271_DACVOL_ATAPI_AL_M        0x08
 106 #define CS4271_DACVOL_ATAPI_AL_BR       0x09
 107 #define CS4271_DACVOL_ATAPI_AL_BL       0x0A
 108 #define CS4271_DACVOL_ATAPI_AL_BLR2     0x0B
 109 #define CS4271_DACVOL_ATAPI_ALR2_M      0x0C
 110 #define CS4271_DACVOL_ATAPI_ALR2_BR     0x0D
 111 #define CS4271_DACVOL_ATAPI_ALR2_BL     0x0E
 112 #define CS4271_DACVOL_ATAPI_ALR2_BLR2   0x0F
 113
 114 #define CS4271_VOLA_MUTE        0x80
 115 #define CS4271_VOLA_VOL_MASK    0x7F
 116 #define CS4271_VOLB_MUTE        0x80
 117 #define CS4271_VOLB_VOL_MASK    0x7F
 118
 119 #define CS4271_ADCCTL_DITHER16  0x20
 120
 121 #define CS4271_ADCCTL_ADC_DIF_MASK      0x10
 122 #define CS4271_ADCCTL_ADC_DIF_LJ        0x00
 123 #define CS4271_ADCCTL_ADC_DIF_I2S       0x10
 124
 125 #define CS4271_ADCCTL_MUTEA     0x08
 126 #define CS4271_ADCCTL_MUTEB     0x04
 127 #define CS4271_ADCCTL_HPFDA     0x02
 128 #define CS4271_ADCCTL_HPFDB     0x01
 129
 130 #define CS4271_MODE2_LOOP       0x10
 131 #define CS4271_MODE2_MUTECAEQUB 0x08
 132 #define CS4271_MODE2_FREEZE     0x04
 133 #define CS4271_MODE2_CPEN       0x02
 134 #define CS4271_MODE2_PDN        0x01
 135
 136 #define CS4271_CHIPID_PART_MASK 0xF0
 137 #define CS4271_CHIPID_REV_MASK  0x0F
 138
 139 /*
 140  * Default CS4271 power-up configuration
 141  * Array contains non-existing in hw register at address 0
 142  * Array do not include Chip ID, as codec driver does not use
 143  * registers read operations at all
 144  */
 145 static const u8 cs4271_dflt_reg[CS4271_NR_REGS] = {
 146         0,
 147         0,
 148         CS4271_DACCTL_AMUTE,
 149         CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR,
 150         0,
 151         0,
 152         0,
 153         0,
 154 };
 155
 156 struct cs4271_private {
 157         /* SND_SOC_I2C or SND_SOC_SPI */
 158         enum snd_soc_control_type       bus_type;
 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 /*
 171  * @freq is the desired MCLK rate
 172  * MCLK rate should (c) be the sample rate, multiplied by one of the
 173  * ratios listed in cs4271_mclk_fs_ratios table
 174  */
 175 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 176                                  int clk_id, unsigned int freq, int dir)
 177 {
 178         struct snd_soc_codec *codec = codec_dai->codec;
 179         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 180
 181         cs4271->mclk = freq;
 182         return 0;
 183 }
 184
 185 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
 186                               unsigned int format)
 187 {
 188         struct snd_soc_codec *codec = codec_dai->codec;
 189         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 190         unsigned int val = 0;
 191         int ret;
 192
 193         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 194         case SND_SOC_DAIFMT_CBS_CFS:
 195                 cs4271->master = 0;
 196                 break;
 197         case SND_SOC_DAIFMT_CBM_CFM:
 198                 cs4271->master = 1;
 199                 val |= CS4271_MODE1_MASTER;
 200                 break;
 201         default:
 202                 dev_err(codec->dev, "Invalid DAI format\n");
 203                 return -EINVAL;
 204         }
 205
 206         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 207         case SND_SOC_DAIFMT_LEFT_J:
 208                 val |= CS4271_MODE1_DAC_DIF_LJ;
 209                 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
 210                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
 211                 if (ret < 0)
 212                         return ret;
 213                 break;
 214         case SND_SOC_DAIFMT_I2S:
 215                 val |= CS4271_MODE1_DAC_DIF_I2S;
 216                 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
 217                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
 218                 if (ret < 0)
 219                         return ret;
 220                 break;
 221         default:
 222                 dev_err(codec->dev, "Invalid DAI format\n");
 223                 return -EINVAL;
 224         }
 225
 226         ret = snd_soc_update_bits(codec, CS4271_MODE1,
 227                 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
 228         if (ret < 0)
 229                 return ret;
 230         return 0;
 231 }
 232
 233 static int cs4271_deemph[] = {0, 44100, 48000, 32000};
 234
 235 static int cs4271_set_deemph(struct snd_soc_codec *codec)
 236 {
 237         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 238         int i, ret;
 239         int val = CS4271_DACCTL_DEM_DIS;
 240
 241         if (cs4271->deemph) {
 242                 /* Find closest de-emphasis freq */
 243                 val = 1;
 244                 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
 245                         if (abs(cs4271_deemph[i] - cs4271->rate) <
 246                             abs(cs4271_deemph[val] - cs4271->rate))
 247                                 val = i;
 248                 val <<= 4;
 249         }
 250
 251         ret = snd_soc_update_bits(codec, CS4271_DACCTL,
 252                 CS4271_DACCTL_DEM_MASK, val);
 253         if (ret < 0)
 254                 return ret;
 255         return 0;
 256 }
 257
 258 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
 259                              struct snd_ctl_elem_value *ucontrol)
 260 {
 261         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 262         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 263
 264         ucontrol->value.enumerated.item[0] = cs4271->deemph;
 265         return 0;
 266 }
 267
 268 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
 269                              struct snd_ctl_elem_value *ucontrol)
 270 {
 271         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 272         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 273
 274         cs4271->deemph = ucontrol->value.enumerated.item[0];
 275         return cs4271_set_deemph(codec);
 276 }
 277
 278 struct cs4271_clk_cfg {
 279         bool            master;         /* codec mode */
 280         u8              speed_mode;     /* codec speed mode: 1x, 2x, 4x */
 281         unsigned short  ratio;          /* MCLK / sample rate */
 282         u8              ratio_mask;     /* ratio bit mask for Master mode */
 283 };
 284
 285 static struct cs4271_clk_cfg cs4271_clk_tab[] = {
 286         {1, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 287         {1, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_15},
 288         {1, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_2},
 289         {1, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_3},
 290         {1, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 291         {1, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_15},
 292         {1, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_2},
 293         {1, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_3},
 294         {1, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 295         {1, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_15},
 296         {1, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_2},
 297         {1, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_3},
 298         {0, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 299         {0, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_1},
 300         {0, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_1},
 301         {0, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_2},
 302         {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
 303         {0, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 304         {0, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_1},
 305         {0, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_1},
 306         {0, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_2},
 307         {0, CS4271_MODE1_MODE_2X, 512,  CS4271_MODE1_DIV_2},
 308         {0, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 309         {0, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_1},
 310         {0, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_1},
 311         {0, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_2},
 312         {0, CS4271_MODE1_MODE_4X, 256,  CS4271_MODE1_DIV_2},
 313 };
 314
 315 #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
 316
 317 static int cs4271_hw_params(struct snd_pcm_substream *substream,
 318                             struct snd_pcm_hw_params *params,
 319                             struct snd_soc_dai *dai)
 320 {
 321         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 322         struct snd_soc_codec *codec = rtd->codec;
 323         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 324         int i, ret;
 325         unsigned int ratio, val;
 326
 327         cs4271->rate = params_rate(params);
 328
 329         /* Configure DAC */
 330         if (cs4271->rate < 50000)
 331                 val = CS4271_MODE1_MODE_1X;
 332         else if (cs4271->rate < 100000)
 333                 val = CS4271_MODE1_MODE_2X;
 334         else
 335                 val = CS4271_MODE1_MODE_4X;
 336
 337         ratio = cs4271->mclk / cs4271->rate;
 338         for (i = 0; i < CS4171_NR_RATIOS; i++)
 339                 if ((cs4271_clk_tab[i].master == cs4271->master) &&
 340                     (cs4271_clk_tab[i].speed_mode == val) &&
 341                     (cs4271_clk_tab[i].ratio == ratio))
 342                         break;
 343
 344         if (i == CS4171_NR_RATIOS) {
 345                 dev_err(codec->dev, "Invalid sample rate\n");
 346                 return -EINVAL;
 347         }
 348
 349         val |= cs4271_clk_tab[i].ratio_mask;
 350
 351         ret = snd_soc_update_bits(codec, CS4271_MODE1,
 352                 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
 353         if (ret < 0)
 354                 return ret;
 355
 356         return cs4271_set_deemph(codec);
 357 }
 358
 359 static int cs4271_digital_mute(struct snd_soc_dai *dai, int mute)
 360 {
 361         struct snd_soc_codec *codec = dai->codec;
 362         int ret;
 363         int val_a = 0;
 364         int val_b = 0;
 365
 366         if (mute) {
 367                 val_a = CS4271_VOLA_MUTE;
 368                 val_b = CS4271_VOLB_MUTE;
 369         }
 370
 371         ret = snd_soc_update_bits(codec, CS4271_VOLA, CS4271_VOLA_MUTE, val_a);
 372         if (ret < 0)
 373                 return ret;
 374         ret = snd_soc_update_bits(codec, CS4271_VOLB, CS4271_VOLB_MUTE, val_b);
 375         if (ret < 0)
 376                 return ret;
 377
 378         return 0;
 379 }
 380
 381 /* CS4271 controls */
 382 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
 383
 384 static const struct snd_kcontrol_new cs4271_snd_controls[] = {
 385         SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
 386                 0, 0x7F, 1, cs4271_dac_tlv),
 387         SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
 388         SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
 389         SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
 390         SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
 391                 cs4271_get_deemph, cs4271_put_deemph),
 392         SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
 393         SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
 394         SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
 395         SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
 396         SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
 397         SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
 398         SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
 399         SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
 400         SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
 401         SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
 402                 7, 1, 1),
 403 };
 404
 405 static struct snd_soc_dai_ops cs4271_dai_ops = {
 406         .hw_params      = cs4271_hw_params,
 407         .set_sysclk     = cs4271_set_dai_sysclk,
 408         .set_fmt        = cs4271_set_dai_fmt,
 409         .digital_mute   = cs4271_digital_mute,
 410 };
 411
 412 static struct snd_soc_dai_driver cs4271_dai = {
 413         .name = "cs4271-hifi",
 414         .playback = {
 415                 .stream_name    = "Playback",
 416                 .channels_min   = 2,
 417                 .channels_max   = 2,
 418                 .rates          = CS4271_PCM_RATES,
 419                 .formats        = CS4271_PCM_FORMATS,
 420         },
 421         .capture = {
 422                 .stream_name    = "Capture",
 423                 .channels_min   = 2,
 424                 .channels_max   = 2,
 425                 .rates          = CS4271_PCM_RATES,
 426                 .formats        = CS4271_PCM_FORMATS,
 427         },
 428         .ops = &cs4271_dai_ops,
 429         .symmetric_rates = 1,
 430 };
 431
 432 #ifdef CONFIG_PM
 433 static int cs4271_soc_suspend(struct snd_soc_codec *codec, pm_message_t mesg)
 434 {
 435         int ret;
 436         /* Set power-down bit */
 437         ret = snd_soc_update_bits(codec, CS4271_MODE2, 0, CS4271_MODE2_PDN);
 438         if (ret < 0)
 439                 return ret;
 440         return 0;
 441 }
 442
 443 static int cs4271_soc_resume(struct snd_soc_codec *codec)
 444 {
 445         int ret;
 446         /* Restore codec state */
 447         ret = snd_soc_cache_sync(codec);
 448         if (ret < 0)
 449                 return ret;
 450         /* then disable the power-down bit */
 451         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
 452         if (ret < 0)
 453                 return ret;
 454         return 0;
 455 }
 456 #else
 457 #define cs4271_soc_suspend      NULL
 458 #define cs4271_soc_resume       NULL
 459 #endif /* CONFIG_PM */
 460
 461 static int cs4271_probe(struct snd_soc_codec *codec)
 462 {
 463         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 464         struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
 465         int ret;
 466         int gpio_nreset = -EINVAL;
 467
 468         if (cs4271plat && gpio_is_valid(cs4271plat->gpio_nreset))
 469                 gpio_nreset = cs4271plat->gpio_nreset;
 470
 471         if (gpio_nreset >= 0)
 472                 if (gpio_request(gpio_nreset, "CS4271 Reset"))
 473                         gpio_nreset = -EINVAL;
 474         if (gpio_nreset >= 0) {
 475                 /* Reset codec */
 476                 gpio_direction_output(gpio_nreset, 0);
 477                 udelay(1);
 478                 gpio_set_value(gpio_nreset, 1);
 479                 /* Give the codec time to wake up */
 480                 udelay(1);
 481         }
 482
 483         cs4271->gpio_nreset = gpio_nreset;
 484
 485         /*
 486          * In case of I2C, chip address specified in board data.
 487          * So cache IO operations use 8 bit codec register address.
 488          * In case of SPI, chip address and register address
 489          * passed together as 16 bit value.
 490          * Anyway, register address is masked with 0xFF inside
 491          * soc-cache code.
 492          */
 493         if (cs4271->bus_type == SND_SOC_SPI)
 494                 ret = snd_soc_codec_set_cache_io(codec, 16, 8,
 495                         cs4271->bus_type);
 496         else
 497                 ret = snd_soc_codec_set_cache_io(codec, 8, 8,
 498                         cs4271->bus_type);
 499         if (ret) {
 500                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 501                 return ret;
 502         }
 503
 504         ret = snd_soc_update_bits(codec, CS4271_MODE2, 0,
 505                 CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
 506         if (ret < 0)
 507                 return ret;
 508         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
 509         if (ret < 0)
 510                 return ret;
 511         /* Power-up sequence requires 85 uS */
 512         udelay(85);
 513
 514         return snd_soc_add_controls(codec, cs4271_snd_controls,
 515                 ARRAY_SIZE(cs4271_snd_controls));
 516 }
 517
 518 static int cs4271_remove(struct snd_soc_codec *codec)
 519 {
 520         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 521         int gpio_nreset;
 522
 523         gpio_nreset = cs4271->gpio_nreset;
 524
 525         if (gpio_is_valid(gpio_nreset)) {
 526                 /* Set codec to the reset state */
 527                 gpio_set_value(gpio_nreset, 0);
 528                 gpio_free(gpio_nreset);
 529         }
 530
 531         return 0;
 532 };
 533
 534 static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
 535         .probe                  = cs4271_probe,
 536         .remove                 = cs4271_remove,
 537         .suspend                = cs4271_soc_suspend,
 538         .resume                 = cs4271_soc_resume,
 539         .reg_cache_default      = cs4271_dflt_reg,
 540         .reg_cache_size         = ARRAY_SIZE(cs4271_dflt_reg),
 541         .reg_word_size          = sizeof(cs4271_dflt_reg[0]),
 542         .compress_type          = SND_SOC_FLAT_COMPRESSION,
 543 };
 544
 545 #if defined(CONFIG_SPI_MASTER)
 546 static int __devinit cs4271_spi_probe(struct spi_device *spi)
 547 {
 548         struct cs4271_private *cs4271;
 549
 550         cs4271 = devm_kzalloc(&spi->dev, sizeof(*cs4271), GFP_KERNEL);
 551         if (!cs4271)
 552                 return -ENOMEM;
 553
 554         spi_set_drvdata(spi, cs4271);
 555         cs4271->bus_type = SND_SOC_SPI;
 556
 557         return snd_soc_register_codec(&spi->dev, &soc_codec_dev_cs4271,
 558                 &cs4271_dai, 1);
 559 }
 560
 561 static int __devexit cs4271_spi_remove(struct spi_device *spi)
 562 {
 563         snd_soc_unregister_codec(&spi->dev);
 564         return 0;
 565 }
 566
 567 static struct spi_driver cs4271_spi_driver = {
 568         .driver = {
 569                 .name   = "cs4271",
 570                 .owner  = THIS_MODULE,
 571         },
 572         .probe          = cs4271_spi_probe,
 573         .remove         = __devexit_p(cs4271_spi_remove),
 574 };
 575 #endif /* defined(CONFIG_SPI_MASTER) */
 576
 577 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 578 static const struct i2c_device_id cs4271_i2c_id[] = {
 579         {"cs4271", 0},
 580         {}
 581 };
 582 MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id);
 583
 584 static int __devinit cs4271_i2c_probe(struct i2c_client *client,
 585                                       const struct i2c_device_id *id)
 586 {
 587         struct cs4271_private *cs4271;
 588
 589         cs4271 = devm_kzalloc(&client->dev, sizeof(*cs4271), GFP_KERNEL);
 590         if (!cs4271)
 591                 return -ENOMEM;
 592
 593         i2c_set_clientdata(client, cs4271);
 594         cs4271->bus_type = SND_SOC_I2C;
 595
 596         return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4271,
 597                 &cs4271_dai, 1);
 598 }
 599
 600 static int __devexit cs4271_i2c_remove(struct i2c_client *client)
 601 {
 602         snd_soc_unregister_codec(&client->dev);
 603         return 0;
 604 }
 605
 606 static struct i2c_driver cs4271_i2c_driver = {
 607         .driver = {
 608                 .name   = "cs4271",
 609                 .owner  = THIS_MODULE,
 610         },
 611         .id_table       = cs4271_i2c_id,
 612         .probe          = cs4271_i2c_probe,
 613         .remove         = __devexit_p(cs4271_i2c_remove),
 614 };
 615 #endif /* defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) */
 616
 617 /*
 618  * We only register our serial bus driver here without
 619  * assignment to particular chip. So if any of the below
 620  * fails, there is some problem with I2C or SPI subsystem.
 621  * In most cases this module will be compiled with support
 622  * of only one serial bus.
 623  */
 624 static int __init cs4271_modinit(void)
 625 {
 626         int ret;
 627
 628 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 629         ret = i2c_add_driver(&cs4271_i2c_driver);
 630         if (ret) {
 631                 pr_err("Failed to register CS4271 I2C driver: %d\n", ret);
 632                 return ret;
 633         }
 634 #endif
 635
 636 #if defined(CONFIG_SPI_MASTER)
 637         ret = spi_register_driver(&cs4271_spi_driver);
 638         if (ret) {
 639                 pr_err("Failed to register CS4271 SPI driver: %d\n", ret);
 640                 return ret;
 641         }
 642 #endif
 643
 644         return 0;
 645 }
 646 module_init(cs4271_modinit);
 647
 648 static void __exit cs4271_modexit(void)
 649 {
 650 #if defined(CONFIG_SPI_MASTER)
 651         spi_unregister_driver(&cs4271_spi_driver);
 652 #endif
 653
 654 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 655         i2c_del_driver(&cs4271_i2c_driver);
 656 #endif
 657 }
 658 module_exit(cs4271_modexit);
 659
 660 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
 661 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
 662 MODULE_LICENSE("GPL");