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.h>
  29 #include <linux/of_device.h>
  30 #include <linux/of_gpio.h>
  31 #include <sound/pcm.h>
  32 #include <sound/soc.h>
  33 #include <sound/tlv.h>
  34 #include <sound/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 struct cs4271_private {
 162         unsigned int                    mclk;
 163         bool                            master;
 164         bool                            deemph;
 165         struct regmap                   *regmap;
 166         /* Current sample rate for de-emphasis control */
 167         int                             rate;
 168         /* GPIO driving Reset pin, if any */
 169         int                             gpio_nreset;
 170         /* GPIO that disable serial bus, if any */
 171         int                             gpio_disable;
 172         /* enable soft reset workaround */
 173         bool                            enable_soft_reset;
 174 };
 175
 176 static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = {
 177 SND_SOC_DAPM_INPUT("AINA"),
 178 SND_SOC_DAPM_INPUT("AINB"),
 179
 180 SND_SOC_DAPM_OUTPUT("AOUTA+"),
 181 SND_SOC_DAPM_OUTPUT("AOUTA-"),
 182 SND_SOC_DAPM_OUTPUT("AOUTB+"),
 183 SND_SOC_DAPM_OUTPUT("AOUTB-"),
 184 };
 185
 186 static const struct snd_soc_dapm_route cs4271_dapm_routes[] = {
 187         { "Capture", NULL, "AINA" },
 188         { "Capture", NULL, "AINB" },
 189
 190         { "AOUTA+", NULL, "Playback" },
 191         { "AOUTA-", NULL, "Playback" },
 192         { "AOUTB+", NULL, "Playback" },
 193         { "AOUTB-", NULL, "Playback" },
 194 };
 195
 196 /*
 197  * @freq is the desired MCLK rate
 198  * MCLK rate should (c) be the sample rate, multiplied by one of the
 199  * ratios listed in cs4271_mclk_fs_ratios table
 200  */
 201 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 202                                  int clk_id, unsigned int freq, int dir)
 203 {
 204         struct snd_soc_codec *codec = codec_dai->codec;
 205         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 206
 207         cs4271->mclk = freq;
 208         return 0;
 209 }
 210
 211 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
 212                               unsigned int format)
 213 {
 214         struct snd_soc_codec *codec = codec_dai->codec;
 215         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 216         unsigned int val = 0;
 217         int ret;
 218
 219         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 220         case SND_SOC_DAIFMT_CBS_CFS:
 221                 cs4271->master = 0;
 222                 break;
 223         case SND_SOC_DAIFMT_CBM_CFM:
 224                 cs4271->master = 1;
 225                 val |= CS4271_MODE1_MASTER;
 226                 break;
 227         default:
 228                 dev_err(codec->dev, "Invalid DAI format\n");
 229                 return -EINVAL;
 230         }
 231
 232         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 233         case SND_SOC_DAIFMT_LEFT_J:
 234                 val |= CS4271_MODE1_DAC_DIF_LJ;
 235                 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
 236                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
 237                 if (ret < 0)
 238                         return ret;
 239                 break;
 240         case SND_SOC_DAIFMT_I2S:
 241                 val |= CS4271_MODE1_DAC_DIF_I2S;
 242                 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
 243                         CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
 244                 if (ret < 0)
 245                         return ret;
 246                 break;
 247         default:
 248                 dev_err(codec->dev, "Invalid DAI format\n");
 249                 return -EINVAL;
 250         }
 251
 252         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
 253                 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
 254         if (ret < 0)
 255                 return ret;
 256         return 0;
 257 }
 258
 259 static int cs4271_deemph[] = {0, 44100, 48000, 32000};
 260
 261 static int cs4271_set_deemph(struct snd_soc_codec *codec)
 262 {
 263         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 264         int i, ret;
 265         int val = CS4271_DACCTL_DEM_DIS;
 266
 267         if (cs4271->deemph) {
 268                 /* Find closest de-emphasis freq */
 269                 val = 1;
 270                 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
 271                         if (abs(cs4271_deemph[i] - cs4271->rate) <
 272                             abs(cs4271_deemph[val] - cs4271->rate))
 273                                 val = i;
 274                 val <<= 4;
 275         }
 276
 277         ret = regmap_update_bits(cs4271->regmap, CS4271_DACCTL,
 278                 CS4271_DACCTL_DEM_MASK, val);
 279         if (ret < 0)
 280                 return ret;
 281         return 0;
 282 }
 283
 284 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
 285                              struct snd_ctl_elem_value *ucontrol)
 286 {
 287         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 288         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 289
 290         ucontrol->value.enumerated.item[0] = cs4271->deemph;
 291         return 0;
 292 }
 293
 294 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
 295                              struct snd_ctl_elem_value *ucontrol)
 296 {
 297         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 298         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 299
 300         cs4271->deemph = ucontrol->value.enumerated.item[0];
 301         return cs4271_set_deemph(codec);
 302 }
 303
 304 struct cs4271_clk_cfg {
 305         bool            master;         /* codec mode */
 306         u8              speed_mode;     /* codec speed mode: 1x, 2x, 4x */
 307         unsigned short  ratio;          /* MCLK / sample rate */
 308         u8              ratio_mask;     /* ratio bit mask for Master mode */
 309 };
 310
 311 static struct cs4271_clk_cfg cs4271_clk_tab[] = {
 312         {1, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 313         {1, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_15},
 314         {1, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_2},
 315         {1, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_3},
 316         {1, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 317         {1, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_15},
 318         {1, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_2},
 319         {1, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_3},
 320         {1, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 321         {1, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_15},
 322         {1, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_2},
 323         {1, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_3},
 324         {0, CS4271_MODE1_MODE_1X, 256,  CS4271_MODE1_DIV_1},
 325         {0, CS4271_MODE1_MODE_1X, 384,  CS4271_MODE1_DIV_1},
 326         {0, CS4271_MODE1_MODE_1X, 512,  CS4271_MODE1_DIV_1},
 327         {0, CS4271_MODE1_MODE_1X, 768,  CS4271_MODE1_DIV_2},
 328         {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
 329         {0, CS4271_MODE1_MODE_2X, 128,  CS4271_MODE1_DIV_1},
 330         {0, CS4271_MODE1_MODE_2X, 192,  CS4271_MODE1_DIV_1},
 331         {0, CS4271_MODE1_MODE_2X, 256,  CS4271_MODE1_DIV_1},
 332         {0, CS4271_MODE1_MODE_2X, 384,  CS4271_MODE1_DIV_2},
 333         {0, CS4271_MODE1_MODE_2X, 512,  CS4271_MODE1_DIV_2},
 334         {0, CS4271_MODE1_MODE_4X, 64,   CS4271_MODE1_DIV_1},
 335         {0, CS4271_MODE1_MODE_4X, 96,   CS4271_MODE1_DIV_1},
 336         {0, CS4271_MODE1_MODE_4X, 128,  CS4271_MODE1_DIV_1},
 337         {0, CS4271_MODE1_MODE_4X, 192,  CS4271_MODE1_DIV_2},
 338         {0, CS4271_MODE1_MODE_4X, 256,  CS4271_MODE1_DIV_2},
 339 };
 340
 341 #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
 342
 343 static int cs4271_hw_params(struct snd_pcm_substream *substream,
 344                             struct snd_pcm_hw_params *params,
 345                             struct snd_soc_dai *dai)
 346 {
 347         struct snd_soc_codec *codec = dai->codec;
 348         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 349         int i, ret;
 350         unsigned int ratio, val;
 351
 352         if (cs4271->enable_soft_reset) {
 353                 /*
 354                  * Put the codec in soft reset and back again in case it's not
 355                  * currently streaming data. This way of bringing the codec in
 356                  * sync to the current clocks is not explicitly documented in
 357                  * the data sheet, but it seems to work fine, and in contrast
 358                  * to a read hardware reset, we don't have to sync back all
 359                  * registers every time.
 360                  */
 361
 362                 if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 363                      !dai->capture_active) ||
 364                     (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 365                      !dai->playback_active)) {
 366                         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 367                                                  CS4271_MODE2_PDN,
 368                                                  CS4271_MODE2_PDN);
 369                         if (ret < 0)
 370                                 return ret;
 371
 372                         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 373                                                  CS4271_MODE2_PDN, 0);
 374                         if (ret < 0)
 375                                 return ret;
 376                 }
 377         }
 378
 379         cs4271->rate = params_rate(params);
 380
 381         /* Configure DAC */
 382         if (cs4271->rate < 50000)
 383                 val = CS4271_MODE1_MODE_1X;
 384         else if (cs4271->rate < 100000)
 385                 val = CS4271_MODE1_MODE_2X;
 386         else
 387                 val = CS4271_MODE1_MODE_4X;
 388
 389         ratio = cs4271->mclk / cs4271->rate;
 390         for (i = 0; i < CS4171_NR_RATIOS; i++)
 391                 if ((cs4271_clk_tab[i].master == cs4271->master) &&
 392                     (cs4271_clk_tab[i].speed_mode == val) &&
 393                     (cs4271_clk_tab[i].ratio == ratio))
 394                         break;
 395
 396         if (i == CS4171_NR_RATIOS) {
 397                 dev_err(codec->dev, "Invalid sample rate\n");
 398                 return -EINVAL;
 399         }
 400
 401         val |= cs4271_clk_tab[i].ratio_mask;
 402
 403         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
 404                 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
 405         if (ret < 0)
 406                 return ret;
 407
 408         return cs4271_set_deemph(codec);
 409 }
 410
 411 static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 412 {
 413         struct snd_soc_codec *codec = dai->codec;
 414         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 415         int ret;
 416         int val_a = 0;
 417         int val_b = 0;
 418
 419         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
 420                 return 0;
 421
 422         if (mute) {
 423                 val_a = CS4271_VOLA_MUTE;
 424                 val_b = CS4271_VOLB_MUTE;
 425         }
 426
 427         ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA,
 428                                  CS4271_VOLA_MUTE, val_a);
 429         if (ret < 0)
 430                 return ret;
 431
 432         ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB,
 433                                  CS4271_VOLB_MUTE, val_b);
 434         if (ret < 0)
 435                 return ret;
 436
 437         return 0;
 438 }
 439
 440 /* CS4271 controls */
 441 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
 442
 443 static const struct snd_kcontrol_new cs4271_snd_controls[] = {
 444         SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
 445                 0, 0x7F, 1, cs4271_dac_tlv),
 446         SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
 447         SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
 448         SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
 449         SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
 450                 cs4271_get_deemph, cs4271_put_deemph),
 451         SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
 452         SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
 453         SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
 454         SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
 455         SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
 456         SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
 457         SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
 458         SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
 459         SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
 460         SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
 461                 7, 1, 1),
 462 };
 463
 464 static const struct snd_soc_dai_ops cs4271_dai_ops = {
 465         .hw_params      = cs4271_hw_params,
 466         .set_sysclk     = cs4271_set_dai_sysclk,
 467         .set_fmt        = cs4271_set_dai_fmt,
 468         .mute_stream    = cs4271_mute_stream,
 469 };
 470
 471 static struct snd_soc_dai_driver cs4271_dai = {
 472         .name = "cs4271-hifi",
 473         .playback = {
 474                 .stream_name    = "Playback",
 475                 .channels_min   = 2,
 476                 .channels_max   = 2,
 477                 .rates          = CS4271_PCM_RATES,
 478                 .formats        = CS4271_PCM_FORMATS,
 479         },
 480         .capture = {
 481                 .stream_name    = "Capture",
 482                 .channels_min   = 2,
 483                 .channels_max   = 2,
 484                 .rates          = CS4271_PCM_RATES,
 485                 .formats        = CS4271_PCM_FORMATS,
 486         },
 487         .ops = &cs4271_dai_ops,
 488         .symmetric_rates = 1,
 489 };
 490
 491 #ifdef CONFIG_PM
 492 static int cs4271_soc_suspend(struct snd_soc_codec *codec)
 493 {
 494         int ret;
 495         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 496
 497         /* Set power-down bit */
 498         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 499                                  CS4271_MODE2_PDN, CS4271_MODE2_PDN);
 500         if (ret < 0)
 501                 return ret;
 502
 503         return 0;
 504 }
 505
 506 static int cs4271_soc_resume(struct snd_soc_codec *codec)
 507 {
 508         int ret;
 509         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 510
 511         /* Restore codec state */
 512         ret = regcache_sync(cs4271->regmap);
 513         if (ret < 0)
 514                 return ret;
 515
 516         /* then disable the power-down bit */
 517         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 518                                  CS4271_MODE2_PDN, 0);
 519         if (ret < 0)
 520                 return ret;
 521
 522         return 0;
 523 }
 524 #else
 525 #define cs4271_soc_suspend      NULL
 526 #define cs4271_soc_resume       NULL
 527 #endif /* CONFIG_PM */
 528
 529 #ifdef CONFIG_OF
 530 static const struct of_device_id cs4271_dt_ids[] = {
 531         { .compatible = "cirrus,cs4271", },
 532         { }
 533 };
 534 MODULE_DEVICE_TABLE(of, cs4271_dt_ids);
 535 #endif
 536
 537 static int cs4271_probe(struct snd_soc_codec *codec)
 538 {
 539         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 540         struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
 541         int ret;
 542         bool amutec_eq_bmutec = false;
 543
 544 #ifdef CONFIG_OF
 545         if (of_match_device(cs4271_dt_ids, codec->dev)) {
 546                 if (of_get_property(codec->dev->of_node,
 547                                      "cirrus,amutec-eq-bmutec", NULL))
 548                         amutec_eq_bmutec = true;
 549
 550                 if (of_get_property(codec->dev->of_node,
 551                                      "cirrus,enable-soft-reset", NULL))
 552                         cs4271->enable_soft_reset = true;
 553         }
 554 #endif
 555
 556         if (cs4271plat) {
 557                 amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
 558                 cs4271->enable_soft_reset = cs4271plat->enable_soft_reset;
 559         }
 560
 561         if (gpio_is_valid(cs4271->gpio_nreset)) {
 562                 /* Reset codec */
 563                 gpio_direction_output(cs4271->gpio_nreset, 0);
 564                 udelay(1);
 565                 gpio_set_value(cs4271->gpio_nreset, 1);
 566                 /* Give the codec time to wake up */
 567                 udelay(1);
 568         }
 569
 570         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 571                                  CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
 572                                  CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
 573         if (ret < 0)
 574                 return ret;
 575         ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 576                                  CS4271_MODE2_PDN, 0);
 577         if (ret < 0)
 578                 return ret;
 579         /* Power-up sequence requires 85 uS */
 580         udelay(85);
 581
 582         if (amutec_eq_bmutec)
 583                 regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 584                                    CS4271_MODE2_MUTECAEQUB,
 585                                    CS4271_MODE2_MUTECAEQUB);
 586
 587         return 0;
 588 }
 589
 590 static int cs4271_remove(struct snd_soc_codec *codec)
 591 {
 592         struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 593
 594         if (gpio_is_valid(cs4271->gpio_nreset))
 595                 /* Set codec to the reset state */
 596                 gpio_set_value(cs4271->gpio_nreset, 0);
 597
 598         return 0;
 599 };
 600
 601 static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
 602         .probe                  = cs4271_probe,
 603         .remove                 = cs4271_remove,
 604         .suspend                = cs4271_soc_suspend,
 605         .resume                 = cs4271_soc_resume,
 606
 607         .controls               = cs4271_snd_controls,
 608         .num_controls           = ARRAY_SIZE(cs4271_snd_controls),
 609         .dapm_widgets           = cs4271_dapm_widgets,
 610         .num_dapm_widgets       = ARRAY_SIZE(cs4271_dapm_widgets),
 611         .dapm_routes            = cs4271_dapm_routes,
 612         .num_dapm_routes        = ARRAY_SIZE(cs4271_dapm_routes),
 613 };
 614
 615 static int cs4271_common_probe(struct device *dev,
 616                                struct cs4271_private **c)
 617 {
 618         struct cs4271_platform_data *cs4271plat = dev->platform_data;
 619         struct cs4271_private *cs4271;
 620
 621         cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL);
 622         if (!cs4271)
 623                 return -ENOMEM;
 624
 625         if (of_match_device(cs4271_dt_ids, dev))
 626                 cs4271->gpio_nreset =
 627                         of_get_named_gpio(dev->of_node, "reset-gpio", 0);
 628
 629         if (cs4271plat)
 630                 cs4271->gpio_nreset = cs4271plat->gpio_nreset;
 631
 632         if (gpio_is_valid(cs4271->gpio_nreset)) {
 633                 int ret;
 634
 635                 ret = devm_gpio_request(dev, cs4271->gpio_nreset,
 636                                         "CS4271 Reset");
 637                 if (ret < 0)
 638                         return ret;
 639         }
 640
 641         *c = cs4271;
 642         return 0;
 643 }
 644
 645 #if defined(CONFIG_SPI_MASTER)
 646
 647 static const struct regmap_config cs4271_spi_regmap = {
 648         .reg_bits = 16,
 649         .val_bits = 8,
 650         .max_register = CS4271_LASTREG,
 651         .read_flag_mask = 0x21,
 652         .write_flag_mask = 0x20,
 653
 654         .reg_defaults = cs4271_reg_defaults,
 655         .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults),
 656         .cache_type = REGCACHE_RBTREE,
 657
 658         .volatile_reg = cs4271_volatile_reg,
 659 };
 660
 661 static int cs4271_spi_probe(struct spi_device *spi)
 662 {
 663         struct cs4271_private *cs4271;
 664         int ret;
 665
 666         ret = cs4271_common_probe(&spi->dev, &cs4271);
 667         if (ret < 0)
 668                 return ret;
 669
 670         spi_set_drvdata(spi, cs4271);
 671         cs4271->regmap = devm_regmap_init_spi(spi, &cs4271_spi_regmap);
 672         if (IS_ERR(cs4271->regmap))
 673                 return PTR_ERR(cs4271->regmap);
 674
 675         return snd_soc_register_codec(&spi->dev, &soc_codec_dev_cs4271,
 676                 &cs4271_dai, 1);
 677 }
 678
 679 static int cs4271_spi_remove(struct spi_device *spi)
 680 {
 681         snd_soc_unregister_codec(&spi->dev);
 682         return 0;
 683 }
 684
 685 static struct spi_driver cs4271_spi_driver = {
 686         .driver = {
 687                 .name   = "cs4271",
 688                 .owner  = THIS_MODULE,
 689                 .of_match_table = of_match_ptr(cs4271_dt_ids),
 690         },
 691         .probe          = cs4271_spi_probe,
 692         .remove         = cs4271_spi_remove,
 693 };
 694 #endif /* defined(CONFIG_SPI_MASTER) */
 695
 696 #if IS_ENABLED(CONFIG_I2C)
 697 static const struct i2c_device_id cs4271_i2c_id[] = {
 698         {"cs4271", 0},
 699         {}
 700 };
 701 MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id);
 702
 703 static const struct regmap_config cs4271_i2c_regmap = {
 704         .reg_bits = 8,
 705         .val_bits = 8,
 706         .max_register = CS4271_LASTREG,
 707
 708         .reg_defaults = cs4271_reg_defaults,
 709         .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults),
 710         .cache_type = REGCACHE_RBTREE,
 711
 712         .volatile_reg = cs4271_volatile_reg,
 713 };
 714
 715 static int cs4271_i2c_probe(struct i2c_client *client,
 716                             const struct i2c_device_id *id)
 717 {
 718         struct cs4271_private *cs4271;
 719         int ret;
 720
 721         ret = cs4271_common_probe(&client->dev, &cs4271);
 722         if (ret < 0)
 723                 return ret;
 724
 725         i2c_set_clientdata(client, cs4271);
 726         cs4271->regmap = devm_regmap_init_i2c(client, &cs4271_i2c_regmap);
 727         if (IS_ERR(cs4271->regmap))
 728                 return PTR_ERR(cs4271->regmap);
 729
 730         return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4271,
 731                 &cs4271_dai, 1);
 732 }
 733
 734 static int cs4271_i2c_remove(struct i2c_client *client)
 735 {
 736         snd_soc_unregister_codec(&client->dev);
 737         return 0;
 738 }
 739
 740 static struct i2c_driver cs4271_i2c_driver = {
 741         .driver = {
 742                 .name   = "cs4271",
 743                 .owner  = THIS_MODULE,
 744                 .of_match_table = of_match_ptr(cs4271_dt_ids),
 745         },
 746         .id_table       = cs4271_i2c_id,
 747         .probe          = cs4271_i2c_probe,
 748         .remove         = cs4271_i2c_remove,
 749 };
 750 #endif /* IS_ENABLED(CONFIG_I2C) */
 751
 752 /*
 753  * We only register our serial bus driver here without
 754  * assignment to particular chip. So if any of the below
 755  * fails, there is some problem with I2C or SPI subsystem.
 756  * In most cases this module will be compiled with support
 757  * of only one serial bus.
 758  */
 759 static int __init cs4271_modinit(void)
 760 {
 761         int ret;
 762
 763 #if IS_ENABLED(CONFIG_I2C)
 764         ret = i2c_add_driver(&cs4271_i2c_driver);
 765         if (ret) {
 766                 pr_err("Failed to register CS4271 I2C driver: %d\n", ret);
 767                 return ret;
 768         }
 769 #endif
 770
 771 #if defined(CONFIG_SPI_MASTER)
 772         ret = spi_register_driver(&cs4271_spi_driver);
 773         if (ret) {
 774                 pr_err("Failed to register CS4271 SPI driver: %d\n", ret);
 775                 return ret;
 776         }
 777 #endif
 778
 779         return 0;
 780 }
 781 module_init(cs4271_modinit);
 782
 783 static void __exit cs4271_modexit(void)
 784 {
 785 #if defined(CONFIG_SPI_MASTER)
 786         spi_unregister_driver(&cs4271_spi_driver);
 787 #endif
 788
 789 #if IS_ENABLED(CONFIG_I2C)
 790         i2c_del_driver(&cs4271_i2c_driver);
 791 #endif
 792 }
 793 module_exit(cs4271_modexit);
 794
 795 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
 796 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
 797 MODULE_LICENSE("GPL");