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/of.h>
  27 #include <linux/of_device.h>
  28 #include <linux/of_gpio.h>
  29 #include <linux/regulator/consumer.h>
  30 #include <sound/pcm.h>
  31 #include <sound/soc.h>
  32 #include <sound/tlv.h>
  33 #include <sound/cs4271.h>
  34 #include "cs4271.h"
  35
  36 #define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
  37                             SNDRV_PCM_FMTBIT_S24_LE | \
  38                             SNDRV_PCM_FMTBIT_S32_LE)
  39 #define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000
  40
  41 /*
  42  * CS4271 registers
  43  */
  44 #define CS4271_MODE1    0x01    /* Mode Control 1 */
  45 #define CS4271_DACCTL   0x02    /* DAC Control */
  46 #define CS4271_DACVOL   0x03    /* DAC Volume & Mixing Control */
  47 #define CS4271_VOLA     0x04    /* DAC Channel A Volume Control */
  48 #define CS4271_VOLB     0x05    /* DAC Channel B Volume Control */
  49 #define CS4271_ADCCTL   0x06    /* ADC Control */
  50 #define CS4271_MODE2    0x07    /* Mode Control 2 */
  51 #define CS4271_CHIPID   0x08    /* Chip ID */
  52
  53 #define CS4271_FIRSTREG CS4271_MODE1
  54 #define CS4271_LASTREG  CS4271_MODE2
  55 #define CS4271_NR_REGS  ((CS4271_LASTREG & 0xFF) + 1)
  56
  57 /* Bit masks for the CS4271 registers */
  58 #define CS4271_MODE1_MODE_MASK  0xC0
  59 #define CS4271_MODE1_MODE_1X    0x00
  60 #define CS4271_MODE1_MODE_2X    0x80
  61 #define CS4271_MODE1_MODE_4X    0xC0
  62
  63 #define CS4271_MODE1_DIV_MASK   0x30
  64 #define CS4271_MODE1_DIV_1      0x00
  65 #define CS4271_MODE1_DIV_15     0x10
  66 #define CS4271_MODE1_DIV_2      0x20
  67 #define CS4271_MODE1_DIV_3      0x30
  68
  69 #define CS4271_MODE1_MASTER     0x08
  70
  71 #define CS4271_MODE1_DAC_DIF_MASK       0x07
  72 #define CS4271_MODE1_DAC_DIF_LJ         0x00
  73 #define CS4271_MODE1_DAC_DIF_I2S        0x01
  74 #define CS4271_MODE1_DAC_DIF_RJ16       0x02
  75 #define CS4271_MODE1_DAC_DIF_RJ24       0x03
  76 #define CS4271_MODE1_DAC_DIF_RJ20       0x04
  77 #define CS4271_MODE1_DAC_DIF_RJ18       0x05
  78
  79 #define CS4271_DACCTL_AMUTE     0x80
  80 #define CS4271_DACCTL_IF_SLOW   0x40
  81
  82 #define CS4271_DACCTL_DEM_MASK  0x30
  83 #define CS4271_DACCTL_DEM_DIS   0x00
  84 #define CS4271_DACCTL_DEM_441   0x10
  85 #define CS4271_DACCTL_DEM_48    0x20
  86 #define CS4271_DACCTL_DEM_32    0x30
  87
  88 #define CS4271_DACCTL_SVRU      0x08
  89 #define CS4271_DACCTL_SRD       0x04
  90 #define CS4271_DACCTL_INVA      0x02
  91 #define CS4271_DACCTL_INVB      0x01
  92
  93 #define CS4271_DACVOL_BEQUA     0x40
  94 #define CS4271_DACVOL_SOFT      0x20
  95 #define CS4271_DACVOL_ZEROC     0x10
  96
  97 #define CS4271_DACVOL_ATAPI_MASK        0x0F
  98 #define CS4271_DACVOL_ATAPI_M_M         0x00
  99 #define CS4271_DACVOL_ATAPI_M_BR        0x01
 100 #define CS4271_DACVOL_ATAPI_M_BL        0x02
 101 #define CS4271_DACVOL_ATAPI_M_BLR2      0x03
 102 #define CS4271_DACVOL_ATAPI_AR_M        0x04
 103 #define CS4271_DACVOL_ATAPI_AR_BR       0x05
 104 #define CS4271_DACVOL_ATAPI_AR_BL       0x06
 105 #define CS4271_DACVOL_ATAPI_AR_BLR2     0x07
 106 #define CS4271_DACVOL_ATAPI_AL_M        0x08
 107 #define CS4271_DACVOL_ATAPI_AL_BR       0x09
 108 #define CS4271_DACVOL_ATAPI_AL_BL       0x0A
 109 #define CS4271_DACVOL_ATAPI_AL_BLR2     0x0B
 110 #define CS4271_DACVOL_ATAPI_ALR2_M      0x0C
 111 #define CS4271_DACVOL_ATAPI_ALR2_BR     0x0D
 112 #define CS4271_DACVOL_ATAPI_ALR2_BL     0x0E
 113 #define CS4271_DACVOL_ATAPI_ALR2_BLR2   0x0F
 114
 115 #define CS4271_VOLA_MUTE        0x80
 116 #define CS4271_VOLA_VOL_MASK    0x7F
 117 #define CS4271_VOLB_MUTE        0x80
 118 #define CS4271_VOLB_VOL_MASK    0x7F
 119
 120 #define CS4271_ADCCTL_DITHER16  0x20
 121
 122 #define CS4271_ADCCTL_ADC_DIF_MASK      0x10
 123 #define CS4271_ADCCTL_ADC_DIF_LJ        0x00
 124 #define CS4271_ADCCTL_ADC_DIF_I2S       0x10
 125
 126 #define CS4271_ADCCTL_MUTEA     0x08
 127 #define CS4271_ADCCTL_MUTEB     0x04
 128 #define CS4271_ADCCTL_HPFDA     0x02
 129 #define CS4271_ADCCTL_HPFDB     0x01
 130
 131 #define CS4271_MODE2_LOOP       0x10
 132 #define CS4271_MODE2_MUTECAEQUB 0x08
 133 #define CS4271_MODE2_FREEZE     0x04
 134 #define CS4271_MODE2_CPEN       0x02
 135 #define CS4271_MODE2_PDN        0x01
 136
 137 #define CS4271_CHIPID_PART_MASK 0xF0
 138 #define CS4271_CHIPID_REV_MASK  0x0F
 139
 140 /*
 141  * Default CS4271 power-up configuration
 142  * Array contains non-existing in hw register at address 0
 143  * Array do not include Chip ID, as codec driver does not use
 144  * registers read operations at all
 145  */
 146 static const struct reg_default cs4271_reg_defaults[] = {
 147         { CS4271_MODE1,         0, },
 148         { CS4271_DACCTL,        CS4271_DACCTL_AMUTE, },
 149         { CS4271_DACVOL,        CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR, },
 150         { CS4271_VOLA,          0, },
 151         { CS4271_VOLB,          0, },
 152         { CS4271_ADCCTL,        0, },
 153         { CS4271_MODE2,         0, },
 154 };
 155
 156 static bool cs4271_volatile_reg(struct device *dev, unsigned int reg)
 157 {
 158         return reg == CS4271_CHIPID;
 159 }
 160
 161 static const char * const supply_names[] = {
 162         "vd", "vl", "va"
 163 };
 164
 165 struct cs4271_private {
 166         unsigned int                    mclk;
 167         bool                            master;
 168         bool                            deemph;
 169         struct regmap                   *regmap;
 170         /* Current sample rate for de-emphasis control */
 171         int                             rate;
 172         /* GPIO driving Reset pin, if any */
 173         int                             gpio_nreset;
 174         /* GPIO that disable serial bus, if any */
 175         int                             gpio_disable;
 176         /* enable soft reset workaround */
 177         bool                            enable_soft_reset;
 178         struct regulator_bulk_data      supplies[ARRAY_SIZE(supply_names)];
 179 };
 180
 181 static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = {
 182 SND_SOC_DAPM_INPUT("AINA"),
 183 SND_SOC_DAPM_INPUT("AINB"),
 184
 185 SND_SOC_DAPM_OUTPUT("AOUTA+"),
 186 SND_SOC_DAPM_OUTPUT("AOUTA-"),
 187 SND_SOC_DAPM_OUTPUT("AOUTB+"),
 188 SND_SOC_DAPM_OUTPUT("AOUTB-"),
 189 };
 190
 191 static const struct snd_soc_dapm_route cs4271_dapm_routes[] = {
 192         { "Capture", NULL, "AINA" },
 193         { "Capture", NULL, "AINB" },
 194
 195         { "AOUTA+", NULL, "Playback" },
 196         { "AOUTA-", NULL, "Playback" },
 197         { "AOUTB+", NULL, "Playback" },
 198         { "AOUTB-", NULL, "Playback" },
 199 };
 200
 201 /*
 202  * @freq is the desired MCLK rate
 203  * MCLK rate should (c) be the sample rate, multiplied by one of the
 204  * ratios listed in cs4271_mclk_fs_ratios table
 205  */
 206 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 207                                  int clk_id, unsigned int freq, int dir)
 208 {
 209         struct snd_soc_codec *codec = codec_dai->codec;
 210         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 211
 212         cs4271->mclk = freq;
 213         return 0;
 214 }
 215
 216 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
 217                               unsigned int format)
 218 {
 219         struct snd_soc_codec *codec = codec_dai->codec;
 220         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 221         unsigned int val = 0;
 222         int ret;
 223
 224         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 225         case SND_SOC_DAIFMT_CBS_CFS:
 226                 cs4271->master = 0;
 227                 break;
 228         case SND_SOC_DAIFMT_CBM_CFM:
 229                 cs4271->master = 1;
 230                 val |= CS4271_MODE1_MASTER;
 231                 break;
 232         default:
 233                 dev_err(codec->dev, "Invalid DAI format\n");
 234                 return -EINVAL;
 235         }
 236
 237         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 238         case SND_SOC_DAIFMT_LEFT_J:
 239                 val |= CS4271_MODE1_DAC_DIF_LJ;
 240                 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
 241                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
 242                 if (ret < 0)
 243                         return ret;
 244                 break;
 245         case SND_SOC_DAIFMT_I2S:
 246                 val |= CS4271_MODE1_DAC_DIF_I2S;
 247                 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
 248                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
 249                 if (ret < 0)
 250                         return ret;
 251                 break;
 252         default:
 253                 dev_err(codec->dev, "Invalid DAI format\n");
 254                 return -EINVAL;
 255         }
 256
 257         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
 258                 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
 259         if (ret < 0)
 260                 return ret;
 261         return 0;
 262 }
 263
 264 static int cs4271_deemph[] = {0, 44100, 48000, 32000};
 265
 266 static int cs4271_set_deemph(struct snd_soc_codec *codec)
 267 {
 268         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 269         int i, ret;
 270         int val = CS4271_DACCTL_DEM_DIS;
 271
 272         if (cs4271->deemph) {
 273                 /* Find closest de-emphasis freq */
 274                 val = 1;
 275                 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
 276                         if (abs(cs4271_deemph[i] - cs4271->rate) <
 277                             abs(cs4271_deemph[val] - cs4271->rate))
 278                                 val = i;
 279                 val <<= 4;
 280         }
 281
 282         ret = regmap_update_bits(cs4271->regmap, CS4271_DACCTL,
 283                 CS4271_DACCTL_DEM_MASK, val);
 284         if (ret < 0)
 285                 return ret;
 286         return 0;
 287 }
 288
 289 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
 290                              struct snd_ctl_elem_value *ucontrol)
 291 {
 292         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 293         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 294
 295         ucontrol->value.integer.value[0] = cs4271->deemph;
 296         return 0;
 297 }
 298
 299 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
 300                              struct snd_ctl_elem_value *ucontrol)
 301 {
 302         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 303         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 304
 305         cs4271->deemph = ucontrol->value.integer.value[0];
 306         return cs4271_set_deemph(codec);
 307 }
 308
 309 struct cs4271_clk_cfg {
 310         bool            master;         /* codec mode */
 311         u8              speed_mode;     /* codec speed mode: 1x, 2x, 4x */
 312         unsigned short  ratio;          /* MCLK / sample rate */
 313         u8              ratio_mask;     /* ratio bit mask for Master mode */
 314 };
 315
 316 static struct cs4271_clk_cfg cs4271_clk_tab[] = {
 317         {1, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 318         {1, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_15},
 319         {1, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_2},
 320         {1, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_3},
 321         {1, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 322         {1, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_15},
 323         {1, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_2},
 324         {1, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_3},
 325         {1, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 326         {1, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_15},
 327         {1, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_2},
 328         {1, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_3},
 329         {0, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 330         {0, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_1},
 331         {0, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_1},
 332         {0, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_2},
 333         {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
 334         {0, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 335         {0, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_1},
 336         {0, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_1},
 337         {0, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_2},
 338         {0, CS4271_MODE1_MODE_2X, 512,  CS4271_MODE1_DIV_2},
 339         {0, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 340         {0, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_1},
 341         {0, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_1},
 342         {0, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_2},
 343         {0, CS4271_MODE1_MODE_4X, 256,  CS4271_MODE1_DIV_2},
 344 };
 345
 346 #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
 347
 348 static int cs4271_hw_params(struct snd_pcm_substream *substream,
 349                             struct snd_pcm_hw_params *params,
 350                             struct snd_soc_dai *dai)
 351 {
 352         struct snd_soc_codec *codec = dai->codec;
 353         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 354         int i, ret;
 355         unsigned int ratio, val;
 356
 357         if (cs4271->enable_soft_reset) {
 358                 /*
 359                  * Put the codec in soft reset and back again in case it's not
 360                  * currently streaming data. This way of bringing the codec in
 361                  * sync to the current clocks is not explicitly documented in
 362                  * the data sheet, but it seems to work fine, and in contrast
 363                  * to a read hardware reset, we don't have to sync back all
 364                  * registers every time.
 365                  */
 366
 367                 if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 368                      !dai->capture_active) ||
 369                     (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 370                      !dai->playback_active)) {
 371                         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 372                                                  CS4271_MODE2_PDN,
 373                                                  CS4271_MODE2_PDN);
 374                         if (ret < 0)
 375                                 return ret;
 376
 377                         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 378                                                  CS4271_MODE2_PDN, 0);
 379                         if (ret < 0)
 380                                 return ret;
 381                 }
 382         }
 383
 384         cs4271->rate = params_rate(params);
 385
 386         /* Configure DAC */
 387         if (cs4271->rate < 50000)
 388                 val = CS4271_MODE1_MODE_1X;
 389         else if (cs4271->rate < 100000)
 390                 val = CS4271_MODE1_MODE_2X;
 391         else
 392                 val = CS4271_MODE1_MODE_4X;
 393
 394         ratio = cs4271->mclk / cs4271->rate;
 395         for (i = 0; i < CS4171_NR_RATIOS; i++)
 396                 if ((cs4271_clk_tab[i].master == cs4271->master) &&
 397                     (cs4271_clk_tab[i].speed_mode == val) &&
 398                     (cs4271_clk_tab[i].ratio == ratio))
 399                         break;
 400
 401         if (i == CS4171_NR_RATIOS) {
 402                 dev_err(codec->dev, "Invalid sample rate\n");
 403                 return -EINVAL;
 404         }
 405
 406         val |= cs4271_clk_tab[i].ratio_mask;
 407
 408         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
 409                 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
 410         if (ret < 0)
 411                 return ret;
 412
 413         return cs4271_set_deemph(codec);
 414 }
 415
 416 static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 417 {
 418         struct snd_soc_codec *codec = dai->codec;
 419         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 420         int ret;
 421         int val_a = 0;
 422         int val_b = 0;
 423
 424         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
 425                 return 0;
 426
 427         if (mute) {
 428                 val_a = CS4271_VOLA_MUTE;
 429                 val_b = CS4271_VOLB_MUTE;
 430         }
 431
 432         ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA,
 433                                  CS4271_VOLA_MUTE, val_a);
 434         if (ret < 0)
 435                 return ret;
 436
 437         ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB,
 438                                  CS4271_VOLB_MUTE, val_b);
 439         if (ret < 0)
 440                 return ret;
 441
 442         return 0;
 443 }
 444
 445 /* CS4271 controls */
 446 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
 447
 448 static const struct snd_kcontrol_new cs4271_snd_controls[] = {
 449         SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
 450                 0, 0x7F, 1, cs4271_dac_tlv),
 451         SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
 452         SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
 453         SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
 454         SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
 455                 cs4271_get_deemph, cs4271_put_deemph),
 456         SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
 457         SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
 458         SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
 459         SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
 460         SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
 461         SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
 462         SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
 463         SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
 464         SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
 465         SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
 466                 7, 1, 1),
 467 };
 468
 469 static const struct snd_soc_dai_ops cs4271_dai_ops = {
 470         .hw_params      = cs4271_hw_params,
 471         .set_sysclk     = cs4271_set_dai_sysclk,
 472         .set_fmt        = cs4271_set_dai_fmt,
 473         .mute_stream    = cs4271_mute_stream,
 474 };
 475
 476 static struct snd_soc_dai_driver cs4271_dai = {
 477         .name = "cs4271-hifi",
 478         .playback = {
 479                 .stream_name    = "Playback",
 480                 .channels_min   = 2,
 481                 .channels_max   = 2,
 482                 .rates          = CS4271_PCM_RATES,
 483                 .formats        = CS4271_PCM_FORMATS,
 484         },
 485         .capture = {
 486                 .stream_name    = "Capture",
 487                 .channels_min   = 2,
 488                 .channels_max   = 2,
 489                 .rates          = CS4271_PCM_RATES,
 490                 .formats        = CS4271_PCM_FORMATS,
 491         },
 492         .ops = &cs4271_dai_ops,
 493         .symmetric_rates = 1,
 494 };
 495
 496 static int cs4271_reset(struct snd_soc_codec *codec)
 497 {
 498         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 499
 500         if (gpio_is_valid(cs4271->gpio_nreset)) {
 501                 gpio_set_value(cs4271->gpio_nreset, 0);
 502                 mdelay(1);
 503                 gpio_set_value(cs4271->gpio_nreset, 1);
 504                 mdelay(1);
 505         }
 506
 507         return 0;
 508 }
 509
 510 #ifdef CONFIG_PM
 511 static int cs4271_soc_suspend(struct snd_soc_codec *codec)
 512 {
 513         int ret;
 514         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 515
 516         /* Set power-down bit */
 517         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 518                                  CS4271_MODE2_PDN, CS4271_MODE2_PDN);
 519         if (ret < 0)
 520                 return ret;
 521
 522         regcache_mark_dirty(cs4271->regmap);
 523         regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies);
 524
 525         return 0;
 526 }
 527
 528 static int cs4271_soc_resume(struct snd_soc_codec *codec)
 529 {
 530         int ret;
 531         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 532
 533         ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies),
 534                                     cs4271->supplies);
 535         if (ret < 0) {
 536                 dev_err(codec->dev, "Failed to enable regulators: %d\n", ret);
 537                 return ret;
 538         }
 539
 540         /* Do a proper reset after power up */
 541         cs4271_reset(codec);
 542
 543         /* Restore codec state */
 544         ret = regcache_sync(cs4271->regmap);
 545         if (ret < 0)
 546                 return ret;
 547
 548         /* then disable the power-down bit */
 549         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 550                                  CS4271_MODE2_PDN, 0);
 551         if (ret < 0)
 552                 return ret;
 553
 554         return 0;
 555 }
 556 #else
 557 #define cs4271_soc_suspend      NULL
 558 #define cs4271_soc_resume       NULL
 559 #endif /* CONFIG_PM */
 560
 561 #ifdef CONFIG_OF
 562 const struct of_device_id cs4271_dt_ids[] = {
 563         { .compatible = "cirrus,cs4271", },
 564         { }
 565 };
 566 MODULE_DEVICE_TABLE(of, cs4271_dt_ids);
 567 EXPORT_SYMBOL_GPL(cs4271_dt_ids);
 568 #endif
 569
 570 static int cs4271_codec_probe(struct snd_soc_codec *codec)
 571 {
 572         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 573         struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
 574         int ret;
 575         bool amutec_eq_bmutec = false;
 576
 577 #ifdef CONFIG_OF
 578         if (of_match_device(cs4271_dt_ids, codec->dev)) {
 579                 if (of_get_property(codec->dev->of_node,
 580                                      "cirrus,amutec-eq-bmutec", NULL))
 581                         amutec_eq_bmutec = true;
 582
 583                 if (of_get_property(codec->dev->of_node,
 584                                      "cirrus,enable-soft-reset", NULL))
 585                         cs4271->enable_soft_reset = true;
 586         }
 587 #endif
 588
 589         ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies),
 590                                     cs4271->supplies);
 591         if (ret < 0) {
 592                 dev_err(codec->dev, "Failed to enable regulators: %d\n", ret);
 593                 return ret;
 594         }
 595
 596         if (cs4271plat) {
 597                 amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
 598                 cs4271->enable_soft_reset = cs4271plat->enable_soft_reset;
 599         }
 600
 601         /* Reset codec */
 602         cs4271_reset(codec);
 603
 604         ret = regcache_sync(cs4271->regmap);
 605         if (ret < 0)
 606                 return ret;
 607
 608         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 609                                  CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
 610                                  CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
 611         if (ret < 0)
 612                 return ret;
 613         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 614                                  CS4271_MODE2_PDN, 0);
 615         if (ret < 0)
 616                 return ret;
 617         /* Power-up sequence requires 85 uS */
 618         udelay(85);
 619
 620         if (amutec_eq_bmutec)
 621                 regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 622                                    CS4271_MODE2_MUTECAEQUB,
 623                                    CS4271_MODE2_MUTECAEQUB);
 624
 625         return 0;
 626 }
 627
 628 static int cs4271_codec_remove(struct snd_soc_codec *codec)
 629 {
 630         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 631
 632         if (gpio_is_valid(cs4271->gpio_nreset))
 633                 /* Set codec to the reset state */
 634                 gpio_set_value(cs4271->gpio_nreset, 0);
 635
 636         regcache_mark_dirty(cs4271->regmap);
 637         regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies);
 638
 639         return 0;
 640 };
 641
 642 static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
 643         .probe                  = cs4271_codec_probe,
 644         .remove                 = cs4271_codec_remove,
 645         .suspend                = cs4271_soc_suspend,
 646         .resume                 = cs4271_soc_resume,
 647
 648         .component_driver = {
 649                 .controls               = cs4271_snd_controls,
 650                 .num_controls           = ARRAY_SIZE(cs4271_snd_controls),
 651                 .dapm_widgets           = cs4271_dapm_widgets,
 652                 .num_dapm_widgets       = ARRAY_SIZE(cs4271_dapm_widgets),
 653                 .dapm_routes            = cs4271_dapm_routes,
 654                 .num_dapm_routes        = ARRAY_SIZE(cs4271_dapm_routes),
 655         },
 656 };
 657
 658 static int cs4271_common_probe(struct device *dev,
 659                                struct cs4271_private **c)
 660 {
 661         struct cs4271_platform_data *cs4271plat = dev->platform_data;
 662         struct cs4271_private *cs4271;
 663         int i, ret;
 664
 665         cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL);
 666         if (!cs4271)
 667                 return -ENOMEM;
 668
 669         if (of_match_device(cs4271_dt_ids, dev))
 670                 cs4271->gpio_nreset =
 671                         of_get_named_gpio(dev->of_node, "reset-gpio", 0);
 672
 673         if (cs4271plat)
 674                 cs4271->gpio_nreset = cs4271plat->gpio_nreset;
 675
 676         if (gpio_is_valid(cs4271->gpio_nreset)) {
 677                 int ret;
 678
 679                 ret = devm_gpio_request(dev, cs4271->gpio_nreset,
 680                                         "CS4271 Reset");
 681                 if (ret < 0)
 682                         return ret;
 683         }
 684
 685         for (i = 0; i < ARRAY_SIZE(supply_names); i++)
 686                 cs4271->supplies[i].supply = supply_names[i];
 687
 688         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(cs4271->supplies),
 689                                         cs4271->supplies);
 690
 691         if (ret < 0) {
 692                 dev_err(dev, "Failed to get regulators: %d\n", ret);
 693                 return ret;
 694         }
 695
 696         *c = cs4271;
 697         return 0;
 698 }
 699
 700 const struct regmap_config cs4271_regmap_config = {
 701         .max_register = CS4271_LASTREG,
 702
 703         .reg_defaults = cs4271_reg_defaults,
 704         .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults),
 705         .cache_type = REGCACHE_RBTREE,
 706
 707         .volatile_reg = cs4271_volatile_reg,
 708 };
 709 EXPORT_SYMBOL_GPL(cs4271_regmap_config);
 710
 711 int cs4271_probe(struct device *dev, struct regmap *regmap)
 712 {
 713         struct cs4271_private *cs4271;
 714         int ret;
 715
 716         if (IS_ERR(regmap))
 717                 return PTR_ERR(regmap);
 718
 719         ret = cs4271_common_probe(dev, &cs4271);
 720         if (ret < 0)
 721                 return ret;
 722
 723         dev_set_drvdata(dev, cs4271);
 724         cs4271->regmap = regmap;
 725
 726         return snd_soc_register_codec(dev, &soc_codec_dev_cs4271, &cs4271_dai,
 727                                       1);
 728 }
 729 EXPORT_SYMBOL_GPL(cs4271_probe);
 730
 731 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
 732 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
 733 MODULE_LICENSE("GPL");