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 <linux/gpio.h>
  26 #include <linux/i2c.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/of_device.h>
  29 #include <linux/of_gpio.h>
  30 #include <sound/pcm.h>
  31 #include <sound/soc.h>
  32 #include <sound/tlv.h>
  33 #include <sound/cs4271.h>
  34
  35 #define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
  36                             SNDRV_PCM_FMTBIT_S24_LE | \
  37                             SNDRV_PCM_FMTBIT_S32_LE)
  38 #define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000
  39
  40 /*
  41  * CS4271 registers
  42  * High byte represents SPI chip address (0x10) + write command (0)
  43  * Low byte - codec register address
  44  */
  45 #define CS4271_MODE1    0x2001  /* Mode Control 1 */
  46 #define CS4271_DACCTL   0x2002  /* DAC Control */
  47 #define CS4271_DACVOL   0x2003  /* DAC Volume & Mixing Control */
  48 #define CS4271_VOLA     0x2004  /* DAC Channel A Volume Control */
  49 #define CS4271_VOLB     0x2005  /* DAC Channel B Volume Control */
  50 #define CS4271_ADCCTL   0x2006  /* ADC Control */
  51 #define CS4271_MODE2    0x2007  /* Mode Control 2 */
  52 #define CS4271_CHIPID   0x2008  /* Chip ID */
  53
  54 #define CS4271_FIRSTREG CS4271_MODE1
  55 #define CS4271_LASTREG  CS4271_MODE2
  56 #define CS4271_NR_REGS  ((CS4271_LASTREG & 0xFF) + 1)
  57
  58 /* Bit masks for the CS4271 registers */
  59 #define CS4271_MODE1_MODE_MASK  0xC0
  60 #define CS4271_MODE1_MODE_1X    0x00
  61 #define CS4271_MODE1_MODE_2X    0x80
  62 #define CS4271_MODE1_MODE_4X    0xC0
  63
  64 #define CS4271_MODE1_DIV_MASK   0x30
  65 #define CS4271_MODE1_DIV_1      0x00
  66 #define CS4271_MODE1_DIV_15     0x10
  67 #define CS4271_MODE1_DIV_2      0x20
  68 #define CS4271_MODE1_DIV_3      0x30
  69
  70 #define CS4271_MODE1_MASTER     0x08
  71
  72 #define CS4271_MODE1_DAC_DIF_MASK       0x07
  73 #define CS4271_MODE1_DAC_DIF_LJ         0x00
  74 #define CS4271_MODE1_DAC_DIF_I2S        0x01
  75 #define CS4271_MODE1_DAC_DIF_RJ16       0x02
  76 #define CS4271_MODE1_DAC_DIF_RJ24       0x03
  77 #define CS4271_MODE1_DAC_DIF_RJ20       0x04
  78 #define CS4271_MODE1_DAC_DIF_RJ18       0x05
  79
  80 #define CS4271_DACCTL_AMUTE     0x80
  81 #define CS4271_DACCTL_IF_SLOW   0x40
  82
  83 #define CS4271_DACCTL_DEM_MASK  0x30
  84 #define CS4271_DACCTL_DEM_DIS   0x00
  85 #define CS4271_DACCTL_DEM_441   0x10
  86 #define CS4271_DACCTL_DEM_48    0x20
  87 #define CS4271_DACCTL_DEM_32    0x30
  88
  89 #define CS4271_DACCTL_SVRU      0x08
  90 #define CS4271_DACCTL_SRD       0x04
  91 #define CS4271_DACCTL_INVA      0x02
  92 #define CS4271_DACCTL_INVB      0x01
  93
  94 #define CS4271_DACVOL_BEQUA     0x40
  95 #define CS4271_DACVOL_SOFT      0x20
  96 #define CS4271_DACVOL_ZEROC     0x10
  97
  98 #define CS4271_DACVOL_ATAPI_MASK        0x0F
  99 #define CS4271_DACVOL_ATAPI_M_M         0x00
 100 #define CS4271_DACVOL_ATAPI_M_BR        0x01
 101 #define CS4271_DACVOL_ATAPI_M_BL        0x02
 102 #define CS4271_DACVOL_ATAPI_M_BLR2      0x03
 103 #define CS4271_DACVOL_ATAPI_AR_M        0x04
 104 #define CS4271_DACVOL_ATAPI_AR_BR       0x05
 105 #define CS4271_DACVOL_ATAPI_AR_BL       0x06
 106 #define CS4271_DACVOL_ATAPI_AR_BLR2     0x07
 107 #define CS4271_DACVOL_ATAPI_AL_M        0x08
 108 #define CS4271_DACVOL_ATAPI_AL_BR       0x09
 109 #define CS4271_DACVOL_ATAPI_AL_BL       0x0A
 110 #define CS4271_DACVOL_ATAPI_AL_BLR2     0x0B
 111 #define CS4271_DACVOL_ATAPI_ALR2_M      0x0C
 112 #define CS4271_DACVOL_ATAPI_ALR2_BR     0x0D
 113 #define CS4271_DACVOL_ATAPI_ALR2_BL     0x0E
 114 #define CS4271_DACVOL_ATAPI_ALR2_BLR2   0x0F
 115
 116 #define CS4271_VOLA_MUTE        0x80
 117 #define CS4271_VOLA_VOL_MASK    0x7F
 118 #define CS4271_VOLB_MUTE        0x80
 119 #define CS4271_VOLB_VOL_MASK    0x7F
 120
 121 #define CS4271_ADCCTL_DITHER16  0x20
 122
 123 #define CS4271_ADCCTL_ADC_DIF_MASK      0x10
 124 #define CS4271_ADCCTL_ADC_DIF_LJ        0x00
 125 #define CS4271_ADCCTL_ADC_DIF_I2S       0x10
 126
 127 #define CS4271_ADCCTL_MUTEA     0x08
 128 #define CS4271_ADCCTL_MUTEB     0x04
 129 #define CS4271_ADCCTL_HPFDA     0x02
 130 #define CS4271_ADCCTL_HPFDB     0x01
 131
 132 #define CS4271_MODE2_LOOP       0x10
 133 #define CS4271_MODE2_MUTECAEQUB 0x08
 134 #define CS4271_MODE2_FREEZE     0x04
 135 #define CS4271_MODE2_CPEN       0x02
 136 #define CS4271_MODE2_PDN        0x01
 137
 138 #define CS4271_CHIPID_PART_MASK 0xF0
 139 #define CS4271_CHIPID_REV_MASK  0x0F
 140
 141 /*
 142  * Default CS4271 power-up configuration
 143  * Array contains non-existing in hw register at address 0
 144  * Array do not include Chip ID, as codec driver does not use
 145  * registers read operations at all
 146  */
 147 static const u8 cs4271_dflt_reg[CS4271_NR_REGS] = {
 148         0,
 149         0,
 150         CS4271_DACCTL_AMUTE,
 151         CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR,
 152         0,
 153         0,
 154         0,
 155         0,
 156 };
 157
 158 struct cs4271_private {
 159         /* SND_SOC_I2C or SND_SOC_SPI */
 160         enum snd_soc_control_type       bus_type;
 161         unsigned int                    mclk;
 162         bool                            master;
 163         bool                            deemph;
 164         /* Current sample rate for de-emphasis control */
 165         int                             rate;
 166         /* GPIO driving Reset pin, if any */
 167         int                             gpio_nreset;
 168         /* GPIO that disable serial bus, if any */
 169         int                             gpio_disable;
 170 };
 171
 172 /*
 173  * @freq is the desired MCLK rate
 174  * MCLK rate should (c) be the sample rate, multiplied by one of the
 175  * ratios listed in cs4271_mclk_fs_ratios table
 176  */
 177 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 178                                  int clk_id, unsigned int freq, int dir)
 179 {
 180         struct snd_soc_codec *codec = codec_dai->codec;
 181         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 182
 183         cs4271->mclk = freq;
 184         return 0;
 185 }
 186
 187 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
 188                               unsigned int format)
 189 {
 190         struct snd_soc_codec *codec = codec_dai->codec;
 191         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 192         unsigned int val = 0;
 193         int ret;
 194
 195         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 196         case SND_SOC_DAIFMT_CBS_CFS:
 197                 cs4271->master = 0;
 198                 break;
 199         case SND_SOC_DAIFMT_CBM_CFM:
 200                 cs4271->master = 1;
 201                 val |= CS4271_MODE1_MASTER;
 202                 break;
 203         default:
 204                 dev_err(codec->dev, "Invalid DAI format\n");
 205                 return -EINVAL;
 206         }
 207
 208         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 209         case SND_SOC_DAIFMT_LEFT_J:
 210                 val |= CS4271_MODE1_DAC_DIF_LJ;
 211                 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
 212                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
 213                 if (ret < 0)
 214                         return ret;
 215                 break;
 216         case SND_SOC_DAIFMT_I2S:
 217                 val |= CS4271_MODE1_DAC_DIF_I2S;
 218                 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
 219                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
 220                 if (ret < 0)
 221                         return ret;
 222                 break;
 223         default:
 224                 dev_err(codec->dev, "Invalid DAI format\n");
 225                 return -EINVAL;
 226         }
 227
 228         ret = snd_soc_update_bits(codec, CS4271_MODE1,
 229                 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
 230         if (ret < 0)
 231                 return ret;
 232         return 0;
 233 }
 234
 235 static int cs4271_deemph[] = {0, 44100, 48000, 32000};
 236
 237 static int cs4271_set_deemph(struct snd_soc_codec *codec)
 238 {
 239         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 240         int i, ret;
 241         int val = CS4271_DACCTL_DEM_DIS;
 242
 243         if (cs4271->deemph) {
 244                 /* Find closest de-emphasis freq */
 245                 val = 1;
 246                 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
 247                         if (abs(cs4271_deemph[i] - cs4271->rate) <
 248                             abs(cs4271_deemph[val] - cs4271->rate))
 249                                 val = i;
 250                 val <<= 4;
 251         }
 252
 253         ret = snd_soc_update_bits(codec, CS4271_DACCTL,
 254                 CS4271_DACCTL_DEM_MASK, val);
 255         if (ret < 0)
 256                 return ret;
 257         return 0;
 258 }
 259
 260 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
 261                              struct snd_ctl_elem_value *ucontrol)
 262 {
 263         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 264         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 265
 266         ucontrol->value.enumerated.item[0] = cs4271->deemph;
 267         return 0;
 268 }
 269
 270 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
 271                              struct snd_ctl_elem_value *ucontrol)
 272 {
 273         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 274         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 275
 276         cs4271->deemph = ucontrol->value.enumerated.item[0];
 277         return cs4271_set_deemph(codec);
 278 }
 279
 280 struct cs4271_clk_cfg {
 281         bool            master;         /* codec mode */
 282         u8              speed_mode;     /* codec speed mode: 1x, 2x, 4x */
 283         unsigned short  ratio;          /* MCLK / sample rate */
 284         u8              ratio_mask;     /* ratio bit mask for Master mode */
 285 };
 286
 287 static struct cs4271_clk_cfg cs4271_clk_tab[] = {
 288         {1, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 289         {1, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_15},
 290         {1, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_2},
 291         {1, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_3},
 292         {1, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 293         {1, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_15},
 294         {1, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_2},
 295         {1, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_3},
 296         {1, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 297         {1, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_15},
 298         {1, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_2},
 299         {1, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_3},
 300         {0, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 301         {0, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_1},
 302         {0, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_1},
 303         {0, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_2},
 304         {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
 305         {0, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 306         {0, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_1},
 307         {0, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_1},
 308         {0, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_2},
 309         {0, CS4271_MODE1_MODE_2X, 512,  CS4271_MODE1_DIV_2},
 310         {0, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 311         {0, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_1},
 312         {0, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_1},
 313         {0, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_2},
 314         {0, CS4271_MODE1_MODE_4X, 256,  CS4271_MODE1_DIV_2},
 315 };
 316
 317 #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
 318
 319 static int cs4271_hw_params(struct snd_pcm_substream *substream,
 320                             struct snd_pcm_hw_params *params,
 321                             struct snd_soc_dai *dai)
 322 {
 323         struct snd_soc_codec *codec = dai->codec;
 324         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 325         int i, ret;
 326         unsigned int ratio, val;
 327
 328         cs4271->rate = params_rate(params);
 329
 330         /* Configure DAC */
 331         if (cs4271->rate < 50000)
 332                 val = CS4271_MODE1_MODE_1X;
 333         else if (cs4271->rate < 100000)
 334                 val = CS4271_MODE1_MODE_2X;
 335         else
 336                 val = CS4271_MODE1_MODE_4X;
 337
 338         ratio = cs4271->mclk / cs4271->rate;
 339         for (i = 0; i < CS4171_NR_RATIOS; i++)
 340                 if ((cs4271_clk_tab[i].master == cs4271->master) &&
 341                     (cs4271_clk_tab[i].speed_mode == val) &&
 342                     (cs4271_clk_tab[i].ratio == ratio))
 343                         break;
 344
 345         if (i == CS4171_NR_RATIOS) {
 346                 dev_err(codec->dev, "Invalid sample rate\n");
 347                 return -EINVAL;
 348         }
 349
 350         val |= cs4271_clk_tab[i].ratio_mask;
 351
 352         ret = snd_soc_update_bits(codec, CS4271_MODE1,
 353                 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
 354         if (ret < 0)
 355                 return ret;
 356
 357         return cs4271_set_deemph(codec);
 358 }
 359
 360 static int cs4271_digital_mute(struct snd_soc_dai *dai, int mute)
 361 {
 362         struct snd_soc_codec *codec = dai->codec;
 363         int ret;
 364         int val_a = 0;
 365         int val_b = 0;
 366
 367         if (mute) {
 368                 val_a = CS4271_VOLA_MUTE;
 369                 val_b = CS4271_VOLB_MUTE;
 370         }
 371
 372         ret = snd_soc_update_bits(codec, CS4271_VOLA, CS4271_VOLA_MUTE, val_a);
 373         if (ret < 0)
 374                 return ret;
 375         ret = snd_soc_update_bits(codec, CS4271_VOLB, CS4271_VOLB_MUTE, val_b);
 376         if (ret < 0)
 377                 return ret;
 378
 379         return 0;
 380 }
 381
 382 /* CS4271 controls */
 383 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
 384
 385 static const struct snd_kcontrol_new cs4271_snd_controls[] = {
 386         SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
 387                 0, 0x7F, 1, cs4271_dac_tlv),
 388         SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
 389         SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
 390         SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
 391         SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
 392                 cs4271_get_deemph, cs4271_put_deemph),
 393         SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
 394         SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
 395         SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
 396         SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
 397         SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
 398         SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
 399         SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
 400         SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
 401         SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
 402         SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
 403                 7, 1, 1),
 404 };
 405
 406 static const struct snd_soc_dai_ops cs4271_dai_ops = {
 407         .hw_params      = cs4271_hw_params,
 408         .set_sysclk     = cs4271_set_dai_sysclk,
 409         .set_fmt        = cs4271_set_dai_fmt,
 410         .digital_mute   = cs4271_digital_mute,
 411 };
 412
 413 static struct snd_soc_dai_driver cs4271_dai = {
 414         .name = "cs4271-hifi",
 415         .playback = {
 416                 .stream_name    = "Playback",
 417                 .channels_min   = 2,
 418                 .channels_max   = 2,
 419                 .rates          = CS4271_PCM_RATES,
 420                 .formats        = CS4271_PCM_FORMATS,
 421         },
 422         .capture = {
 423                 .stream_name    = "Capture",
 424                 .channels_min   = 2,
 425                 .channels_max   = 2,
 426                 .rates          = CS4271_PCM_RATES,
 427                 .formats        = CS4271_PCM_FORMATS,
 428         },
 429         .ops = &cs4271_dai_ops,
 430         .symmetric_rates = 1,
 431 };
 432
 433 #ifdef CONFIG_PM
 434 static int cs4271_soc_suspend(struct snd_soc_codec *codec)
 435 {
 436         int ret;
 437         /* Set power-down bit */
 438         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN,
 439                                   CS4271_MODE2_PDN);
 440         if (ret < 0)
 441                 return ret;
 442         return 0;
 443 }
 444
 445 static int cs4271_soc_resume(struct snd_soc_codec *codec)
 446 {
 447         int ret;
 448         /* Restore codec state */
 449         ret = snd_soc_cache_sync(codec);
 450         if (ret < 0)
 451                 return ret;
 452         /* then disable the power-down bit */
 453         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
 454         if (ret < 0)
 455                 return ret;
 456         return 0;
 457 }
 458 #else
 459 #define cs4271_soc_suspend      NULL
 460 #define cs4271_soc_resume       NULL
 461 #endif /* CONFIG_PM */
 462
 463 #ifdef CONFIG_OF
 464 static const struct of_device_id cs4271_dt_ids[] = {
 465         { .compatible = "cirrus,cs4271", },
 466         { }
 467 };
 468 MODULE_DEVICE_TABLE(of, cs4271_dt_ids);
 469 #endif
 470
 471 static int cs4271_probe(struct snd_soc_codec *codec)
 472 {
 473         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 474         struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
 475         int ret;
 476         int gpio_nreset = -EINVAL;
 477         int amutec_eq_bmutec = 0;
 478
 479 #ifdef CONFIG_OF
 480         if (of_match_device(cs4271_dt_ids, codec->dev)) {
 481                 gpio_nreset = of_get_named_gpio(codec->dev->of_node,
 482                                                 "reset-gpio", 0);
 483
 484                 if (!of_get_property(codec->dev->of_node,
 485                                      "cirrus,amutec-eq-bmutec", NULL))
 486                         amutec_eq_bmutec = 1;
 487         }
 488 #endif
 489
 490         if (cs4271plat) {
 491                 if (gpio_is_valid(cs4271plat->gpio_nreset))
 492                         gpio_nreset = cs4271plat->gpio_nreset;
 493
 494                 amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
 495         }
 496
 497         if (gpio_nreset >= 0)
 498                 if (gpio_request(gpio_nreset, "CS4271 Reset"))
 499                         gpio_nreset = -EINVAL;
 500         if (gpio_nreset >= 0) {
 501                 /* Reset codec */
 502                 gpio_direction_output(gpio_nreset, 0);
 503                 udelay(1);
 504                 gpio_set_value(gpio_nreset, 1);
 505                 /* Give the codec time to wake up */
 506                 udelay(1);
 507         }
 508
 509         cs4271->gpio_nreset = gpio_nreset;
 510
 511         /*
 512          * In case of I2C, chip address specified in board data.
 513          * So cache IO operations use 8 bit codec register address.
 514          * In case of SPI, chip address and register address
 515          * passed together as 16 bit value.
 516          * Anyway, register address is masked with 0xFF inside
 517          * soc-cache code.
 518          */
 519         if (cs4271->bus_type == SND_SOC_SPI)
 520                 ret = snd_soc_codec_set_cache_io(codec, 16, 8,
 521                         cs4271->bus_type);
 522         else
 523                 ret = snd_soc_codec_set_cache_io(codec, 8, 8,
 524                         cs4271->bus_type);
 525         if (ret) {
 526                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 527                 return ret;
 528         }
 529
 530         ret = snd_soc_update_bits(codec, CS4271_MODE2,
 531                                   CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
 532                                   CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
 533         if (ret < 0)
 534                 return ret;
 535         ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
 536         if (ret < 0)
 537                 return ret;
 538         /* Power-up sequence requires 85 uS */
 539         udelay(85);
 540
 541         if (amutec_eq_bmutec)
 542                 snd_soc_update_bits(codec, CS4271_MODE2,
 543                                     CS4271_MODE2_MUTECAEQUB,
 544                                     CS4271_MODE2_MUTECAEQUB);
 545
 546         return snd_soc_add_codec_controls(codec, cs4271_snd_controls,
 547                 ARRAY_SIZE(cs4271_snd_controls));
 548 }
 549
 550 static int cs4271_remove(struct snd_soc_codec *codec)
 551 {
 552         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 553         int gpio_nreset;
 554
 555         gpio_nreset = cs4271->gpio_nreset;
 556
 557         if (gpio_is_valid(gpio_nreset)) {
 558                 /* Set codec to the reset state */
 559                 gpio_set_value(gpio_nreset, 0);
 560                 gpio_free(gpio_nreset);
 561         }
 562
 563         return 0;
 564 };
 565
 566 static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
 567         .probe                  = cs4271_probe,
 568         .remove                 = cs4271_remove,
 569         .suspend                = cs4271_soc_suspend,
 570         .resume                 = cs4271_soc_resume,
 571         .reg_cache_default      = cs4271_dflt_reg,
 572         .reg_cache_size         = ARRAY_SIZE(cs4271_dflt_reg),
 573         .reg_word_size          = sizeof(cs4271_dflt_reg[0]),
 574         .compress_type          = SND_SOC_FLAT_COMPRESSION,
 575 };
 576
 577 #if defined(CONFIG_SPI_MASTER)
 578 static int __devinit cs4271_spi_probe(struct spi_device *spi)
 579 {
 580         struct cs4271_private *cs4271;
 581
 582         cs4271 = devm_kzalloc(&spi->dev, sizeof(*cs4271), GFP_KERNEL);
 583         if (!cs4271)
 584                 return -ENOMEM;
 585
 586         spi_set_drvdata(spi, cs4271);
 587         cs4271->bus_type = SND_SOC_SPI;
 588
 589         return snd_soc_register_codec(&spi->dev, &soc_codec_dev_cs4271,
 590                 &cs4271_dai, 1);
 591 }
 592
 593 static int __devexit cs4271_spi_remove(struct spi_device *spi)
 594 {
 595         snd_soc_unregister_codec(&spi->dev);
 596         return 0;
 597 }
 598
 599 static struct spi_driver cs4271_spi_driver = {
 600         .driver = {
 601                 .name   = "cs4271",
 602                 .owner  = THIS_MODULE,
 603                 .of_match_table = of_match_ptr(cs4271_dt_ids),
 604         },
 605         .probe          = cs4271_spi_probe,
 606         .remove         = __devexit_p(cs4271_spi_remove),
 607 };
 608 #endif /* defined(CONFIG_SPI_MASTER) */
 609
 610 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 611 static const struct i2c_device_id cs4271_i2c_id[] = {
 612         {"cs4271", 0},
 613         {}
 614 };
 615 MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id);
 616
 617 static int __devinit cs4271_i2c_probe(struct i2c_client *client,
 618                                       const struct i2c_device_id *id)
 619 {
 620         struct cs4271_private *cs4271;
 621
 622         cs4271 = devm_kzalloc(&client->dev, sizeof(*cs4271), GFP_KERNEL);
 623         if (!cs4271)
 624                 return -ENOMEM;
 625
 626         i2c_set_clientdata(client, cs4271);
 627         cs4271->bus_type = SND_SOC_I2C;
 628
 629         return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4271,
 630                 &cs4271_dai, 1);
 631 }
 632
 633 static int __devexit cs4271_i2c_remove(struct i2c_client *client)
 634 {
 635         snd_soc_unregister_codec(&client->dev);
 636         return 0;
 637 }
 638
 639 static struct i2c_driver cs4271_i2c_driver = {
 640         .driver = {
 641                 .name   = "cs4271",
 642                 .owner  = THIS_MODULE,
 643                 .of_match_table = of_match_ptr(cs4271_dt_ids),
 644         },
 645         .id_table       = cs4271_i2c_id,
 646         .probe          = cs4271_i2c_probe,
 647         .remove         = __devexit_p(cs4271_i2c_remove),
 648 };
 649 #endif /* defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) */
 650
 651 /*
 652  * We only register our serial bus driver here without
 653  * assignment to particular chip. So if any of the below
 654  * fails, there is some problem with I2C or SPI subsystem.
 655  * In most cases this module will be compiled with support
 656  * of only one serial bus.
 657  */
 658 static int __init cs4271_modinit(void)
 659 {
 660         int ret;
 661
 662 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 663         ret = i2c_add_driver(&cs4271_i2c_driver);
 664         if (ret) {
 665                 pr_err("Failed to register CS4271 I2C driver: %d\n", ret);
 666                 return ret;
 667         }
 668 #endif
 669
 670 #if defined(CONFIG_SPI_MASTER)
 671         ret = spi_register_driver(&cs4271_spi_driver);
 672         if (ret) {
 673                 pr_err("Failed to register CS4271 SPI driver: %d\n", ret);
 674                 return ret;
 675         }
 676 #endif
 677
 678         return 0;
 679 }
 680 module_init(cs4271_modinit);
 681
 682 static void __exit cs4271_modexit(void)
 683 {
 684 #if defined(CONFIG_SPI_MASTER)
 685         spi_unregister_driver(&cs4271_spi_driver);
 686 #endif
 687
 688 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 689         i2c_del_driver(&cs4271_i2c_driver);
 690 #endif
 691 }
 692 module_exit(cs4271_modexit);
 693
 694 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
 695 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
 696 MODULE_LICENSE("GPL");