sound/soc/codecs/ak4642.c

   1 /*
   2  * ak4642.c  --  AK4642/AK4643 ALSA Soc Audio driver
   3  *
   4  * Copyright (C) 2009 Renesas Solutions Corp.
   5  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   6  *
   7  * Based on wm8731.c by Richard Purdie
   8  * Based on ak4535.c by Richard Purdie
   9  * Based on wm8753.c by Liam Girdwood
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 /* ** CAUTION **
  17  *
  18  * This is very simple driver.
  19  * It can use headphone output / stereo input only
  20  *
  21  * AK4642 is tested.
  22  * AK4643 is tested.
  23  * AK4648 is tested.
  24  */
  25
  26 #include <linux/clk.h>
  27 #include <linux/clk-provider.h>
  28 #include <linux/delay.h>
  29 #include <linux/i2c.h>
  30 #include <linux/slab.h>
  31 #include <linux/of_device.h>
  32 #include <linux/module.h>
  33 #include <linux/regmap.h>
  34 #include <sound/soc.h>
  35 #include <sound/initval.h>
  36 #include <sound/tlv.h>
  37
  38 #define PW_MGMT1        0x00
  39 #define PW_MGMT2        0x01
  40 #define SG_SL1          0x02
  41 #define SG_SL2          0x03
  42 #define MD_CTL1         0x04
  43 #define MD_CTL2         0x05
  44 #define TIMER           0x06
  45 #define ALC_CTL1        0x07
  46 #define ALC_CTL2        0x08
  47 #define L_IVC           0x09
  48 #define L_DVC           0x0a
  49 #define ALC_CTL3        0x0b
  50 #define R_IVC           0x0c
  51 #define R_DVC           0x0d
  52 #define MD_CTL3         0x0e
  53 #define MD_CTL4         0x0f
  54 #define PW_MGMT3        0x10
  55 #define DF_S            0x11
  56 #define FIL3_0          0x12
  57 #define FIL3_1          0x13
  58 #define FIL3_2          0x14
  59 #define FIL3_3          0x15
  60 #define EQ_0            0x16
  61 #define EQ_1            0x17
  62 #define EQ_2            0x18
  63 #define EQ_3            0x19
  64 #define EQ_4            0x1a
  65 #define EQ_5            0x1b
  66 #define FIL1_0          0x1c
  67 #define FIL1_1          0x1d
  68 #define FIL1_2          0x1e
  69 #define FIL1_3          0x1f    /* The maximum valid register for ak4642 */
  70 #define PW_MGMT4        0x20
  71 #define MD_CTL5         0x21
  72 #define LO_MS           0x22
  73 #define HP_MS           0x23
  74 #define SPK_MS          0x24    /* The maximum valid register for ak4643 */
  75 #define EQ_FBEQAB       0x25
  76 #define EQ_FBEQCD       0x26
  77 #define EQ_FBEQE        0x27    /* The maximum valid register for ak4648 */
  78
  79 /* PW_MGMT1*/
  80 #define PMVCM           (1 << 6) /* VCOM Power Management */
  81 #define PMMIN           (1 << 5) /* MIN Input Power Management */
  82 #define PMDAC           (1 << 2) /* DAC Power Management */
  83 #define PMADL           (1 << 0) /* MIC Amp Lch and ADC Lch Power Management */
  84
  85 /* PW_MGMT2 */
  86 #define HPMTN           (1 << 6)
  87 #define PMHPL           (1 << 5)
  88 #define PMHPR           (1 << 4)
  89 #define MS              (1 << 3) /* master/slave select */
  90 #define MCKO            (1 << 1)
  91 #define PMPLL           (1 << 0)
  92
  93 #define PMHP_MASK       (PMHPL | PMHPR)
  94 #define PMHP            PMHP_MASK
  95
  96 /* PW_MGMT3 */
  97 #define PMADR           (1 << 0) /* MIC L / ADC R Power Management */
  98
  99 /* SG_SL1 */
 100 #define MINS            (1 << 6) /* Switch from MIN to Speaker */
 101 #define DACL            (1 << 4) /* Switch from DAC to Stereo or Receiver */
 102 #define PMMP            (1 << 2) /* MPWR pin Power Management */
 103 #define MGAIN0          (1 << 0) /* MIC amp gain*/
 104
 105 /* SG_SL2 */
 106 #define LOPS            (1 << 6) /* Stero Line-out Power Save Mode */
 107
 108 /* TIMER */
 109 #define ZTM(param)      ((param & 0x3) << 4) /* ALC Zero Crossing TimeOut */
 110 #define WTM(param)      (((param & 0x4) << 4) | ((param & 0x3) << 2))
 111
 112 /* ALC_CTL1 */
 113 #define ALC             (1 << 5) /* ALC Enable */
 114 #define LMTH0           (1 << 0) /* ALC Limiter / Recovery Level */
 115
 116 /* MD_CTL1 */
 117 #define PLL3            (1 << 7)
 118 #define PLL2            (1 << 6)
 119 #define PLL1            (1 << 5)
 120 #define PLL0            (1 << 4)
 121 #define PLL_MASK        (PLL3 | PLL2 | PLL1 | PLL0)
 122
 123 #define BCKO_MASK       (1 << 3)
 124 #define BCKO_64         BCKO_MASK
 125
 126 #define DIF_MASK        (3 << 0)
 127 #define DSP             (0 << 0)
 128 #define RIGHT_J         (1 << 0)
 129 #define LEFT_J          (2 << 0)
 130 #define I2S             (3 << 0)
 131
 132 /* MD_CTL2 */
 133 #define FSs(val)        (((val & 0x7) << 0) | ((val & 0x8) << 2))
 134 #define PSs(val)        ((val & 0x3) << 6)
 135
 136 /* MD_CTL3 */
 137 #define BST1            (1 << 3)
 138
 139 /* MD_CTL4 */
 140 #define DACH            (1 << 0)
 141
 142 struct ak4642_drvdata {
 143         const struct regmap_config *regmap_config;
 144         int extended_frequencies;
 145 };
 146
 147 struct ak4642_priv {
 148         const struct ak4642_drvdata *drvdata;
 149         struct clk *mcko;
 150 };
 151
 152 /*
 153  * Playback Volume (table 39)
 154  *
 155  * max : 0x00 : +12.0 dB
 156  *       ( 0.5 dB step )
 157  * min : 0xFE : -115.0 dB
 158  * mute: 0xFF
 159  */
 160 static const DECLARE_TLV_DB_SCALE(out_tlv, -11550, 50, 1);
 161
 162 static const struct snd_kcontrol_new ak4642_snd_controls[] = {
 163
 164         SOC_DOUBLE_R_TLV("Digital Playback Volume", L_DVC, R_DVC,
 165                          0, 0xFF, 1, out_tlv),
 166         SOC_SINGLE("ALC Capture Switch", ALC_CTL1, 5, 1, 0),
 167         SOC_SINGLE("ALC Capture ZC Switch", ALC_CTL1, 4, 1, 1),
 168 };
 169
 170 static const struct snd_kcontrol_new ak4642_headphone_control =
 171         SOC_DAPM_SINGLE("Switch", PW_MGMT2, 6, 1, 0);
 172
 173 static const struct snd_kcontrol_new ak4642_lout_mixer_controls[] = {
 174         SOC_DAPM_SINGLE("DACL", SG_SL1, 4, 1, 0),
 175 };
 176
 177 /* event handlers */
 178 static int ak4642_lout_event(struct snd_soc_dapm_widget *w,
 179                              struct snd_kcontrol *kcontrol, int event)
 180 {
 181         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 182
 183         switch (event) {
 184         case SND_SOC_DAPM_PRE_PMD:
 185         case SND_SOC_DAPM_PRE_PMU:
 186                 /* Power save mode ON */
 187                 snd_soc_update_bits(codec, SG_SL2, LOPS, LOPS);
 188                 break;
 189         case SND_SOC_DAPM_POST_PMU:
 190         case SND_SOC_DAPM_POST_PMD:
 191                 /* Power save mode OFF */
 192                 msleep(300);
 193                 snd_soc_update_bits(codec, SG_SL2, LOPS, 0);
 194                 break;
 195         }
 196
 197         return 0;
 198 }
 199
 200 static const struct snd_soc_dapm_widget ak4642_dapm_widgets[] = {
 201
 202         /* Outputs */
 203         SND_SOC_DAPM_OUTPUT("HPOUTL"),
 204         SND_SOC_DAPM_OUTPUT("HPOUTR"),
 205         SND_SOC_DAPM_OUTPUT("LINEOUT"),
 206
 207         SND_SOC_DAPM_PGA("HPL Out", PW_MGMT2, 5, 0, NULL, 0),
 208         SND_SOC_DAPM_PGA("HPR Out", PW_MGMT2, 4, 0, NULL, 0),
 209         SND_SOC_DAPM_SWITCH("Headphone Enable", SND_SOC_NOPM, 0, 0,
 210                             &ak4642_headphone_control),
 211
 212         SND_SOC_DAPM_PGA("DACH", MD_CTL4, 0, 0, NULL, 0),
 213
 214         SND_SOC_DAPM_MIXER_E("LINEOUT Mixer", PW_MGMT1, 3, 0,
 215                            &ak4642_lout_mixer_controls[0],
 216                            ARRAY_SIZE(ak4642_lout_mixer_controls),
 217                            ak4642_lout_event,
 218                            SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
 219                            SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
 220
 221         /* DAC */
 222         SND_SOC_DAPM_DAC("DAC", NULL, PW_MGMT1, 2, 0),
 223 };
 224
 225 static const struct snd_soc_dapm_route ak4642_intercon[] = {
 226
 227         /* Outputs */
 228         {"HPOUTL", NULL, "HPL Out"},
 229         {"HPOUTR", NULL, "HPR Out"},
 230         {"LINEOUT", NULL, "LINEOUT Mixer"},
 231
 232         {"HPL Out", NULL, "Headphone Enable"},
 233         {"HPR Out", NULL, "Headphone Enable"},
 234
 235         {"Headphone Enable", "Switch", "DACH"},
 236
 237         {"DACH", NULL, "DAC"},
 238
 239         {"LINEOUT Mixer", "DACL", "DAC"},
 240
 241         { "DAC", NULL, "Playback" },
 242 };
 243
 244 /*
 245  * ak4642 register cache
 246  */
 247 static const struct reg_default ak4643_reg[] = {
 248         {  0, 0x00 }, {  1, 0x00 }, {  2, 0x01 }, {  3, 0x00 },
 249         {  4, 0x02 }, {  5, 0x00 }, {  6, 0x00 }, {  7, 0x00 },
 250         {  8, 0xe1 }, {  9, 0xe1 }, { 10, 0x18 }, { 11, 0x00 },
 251         { 12, 0xe1 }, { 13, 0x18 }, { 14, 0x11 }, { 15, 0x08 },
 252         { 16, 0x00 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x00 },
 253         { 20, 0x00 }, { 21, 0x00 }, { 22, 0x00 }, { 23, 0x00 },
 254         { 24, 0x00 }, { 25, 0x00 }, { 26, 0x00 }, { 27, 0x00 },
 255         { 28, 0x00 }, { 29, 0x00 }, { 30, 0x00 }, { 31, 0x00 },
 256         { 32, 0x00 }, { 33, 0x00 }, { 34, 0x00 }, { 35, 0x00 },
 257         { 36, 0x00 },
 258 };
 259
 260 /* The default settings for 0x0 ~ 0x1f registers are the same for ak4642
 261    and ak4643. So we reuse the ak4643 reg_default for ak4642.
 262    The valid registers for ak4642 are 0x0 ~ 0x1f which is a subset of ak4643,
 263    so define NUM_AK4642_REG_DEFAULTS for ak4642.
 264 */
 265 #define ak4642_reg ak4643_reg
 266 #define NUM_AK4642_REG_DEFAULTS (FIL1_3 + 1)
 267
 268 static const struct reg_default ak4648_reg[] = {
 269         {  0, 0x00 }, {  1, 0x00 }, {  2, 0x01 }, {  3, 0x00 },
 270         {  4, 0x02 }, {  5, 0x00 }, {  6, 0x00 }, {  7, 0x00 },
 271         {  8, 0xe1 }, {  9, 0xe1 }, { 10, 0x18 }, { 11, 0x00 },
 272         { 12, 0xe1 }, { 13, 0x18 }, { 14, 0x11 }, { 15, 0xb8 },
 273         { 16, 0x00 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x00 },
 274         { 20, 0x00 }, { 21, 0x00 }, { 22, 0x00 }, { 23, 0x00 },
 275         { 24, 0x00 }, { 25, 0x00 }, { 26, 0x00 }, { 27, 0x00 },
 276         { 28, 0x00 }, { 29, 0x00 }, { 30, 0x00 }, { 31, 0x00 },
 277         { 32, 0x00 }, { 33, 0x00 }, { 34, 0x00 }, { 35, 0x00 },
 278         { 36, 0x00 }, { 37, 0x88 }, { 38, 0x88 }, { 39, 0x08 },
 279 };
 280
 281 static int ak4642_dai_startup(struct snd_pcm_substream *substream,
 282                               struct snd_soc_dai *dai)
 283 {
 284         int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 285         struct snd_soc_codec *codec = dai->codec;
 286
 287         if (is_play) {
 288                 /*
 289                  * start headphone output
 290                  *
 291                  * PLL, Master Mode
 292                  * Audio I/F Format :MSB justified (ADC & DAC)
 293                  * Bass Boost Level : Middle
 294                  *
 295                  * This operation came from example code of
 296                  * "ASAHI KASEI AK4642" (japanese) manual p97.
 297                  */
 298                 snd_soc_write(codec, L_IVC, 0x91); /* volume */
 299                 snd_soc_write(codec, R_IVC, 0x91); /* volume */
 300         } else {
 301                 /*
 302                  * start stereo input
 303                  *
 304                  * PLL Master Mode
 305                  * Audio I/F Format:MSB justified (ADC & DAC)
 306                  * Pre MIC AMP:+20dB
 307                  * MIC Power On
 308                  * ALC setting:Refer to Table 35
 309                  * ALC bit=“1”
 310                  *
 311                  * This operation came from example code of
 312                  * "ASAHI KASEI AK4642" (japanese) manual p94.
 313                  */
 314                 snd_soc_update_bits(codec, SG_SL1, PMMP | MGAIN0, PMMP | MGAIN0);
 315                 snd_soc_write(codec, TIMER, ZTM(0x3) | WTM(0x3));
 316                 snd_soc_write(codec, ALC_CTL1, ALC | LMTH0);
 317                 snd_soc_update_bits(codec, PW_MGMT1, PMADL, PMADL);
 318                 snd_soc_update_bits(codec, PW_MGMT3, PMADR, PMADR);
 319         }
 320
 321         return 0;
 322 }
 323
 324 static void ak4642_dai_shutdown(struct snd_pcm_substream *substream,
 325                                struct snd_soc_dai *dai)
 326 {
 327         int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 328         struct snd_soc_codec *codec = dai->codec;
 329
 330         if (is_play) {
 331         } else {
 332                 /* stop stereo input */
 333                 snd_soc_update_bits(codec, PW_MGMT1, PMADL, 0);
 334                 snd_soc_update_bits(codec, PW_MGMT3, PMADR, 0);
 335                 snd_soc_update_bits(codec, ALC_CTL1, ALC, 0);
 336         }
 337 }
 338
 339 static int ak4642_dai_set_sysclk(struct snd_soc_dai *codec_dai,
 340         int clk_id, unsigned int freq, int dir)
 341 {
 342         struct snd_soc_codec *codec = codec_dai->codec;
 343         struct ak4642_priv *priv = snd_soc_codec_get_drvdata(codec);
 344         u8 pll;
 345         int extended_freq = 0;
 346
 347         switch (freq) {
 348         case 11289600:
 349                 pll = PLL2;
 350                 break;
 351         case 12288000:
 352                 pll = PLL2 | PLL0;
 353                 break;
 354         case 12000000:
 355                 pll = PLL2 | PLL1;
 356                 break;
 357         case 24000000:
 358                 pll = PLL2 | PLL1 | PLL0;
 359                 break;
 360         case 13500000:
 361                 pll = PLL3 | PLL2;
 362                 break;
 363         case 27000000:
 364                 pll = PLL3 | PLL2 | PLL0;
 365                 break;
 366         case 19200000:
 367                 pll = PLL3;
 368                 extended_freq = 1;
 369                 break;
 370         case 13000000:
 371                 pll = PLL3 | PLL2 | PLL1;
 372                 extended_freq = 1;
 373                 break;
 374         case 26000000:
 375                 pll = PLL3 | PLL2 | PLL1 | PLL0;
 376                 extended_freq = 1;
 377                 break;
 378         default:
 379                 return -EINVAL;
 380         }
 381
 382         if (extended_freq && !priv->drvdata->extended_frequencies)
 383                 return -EINVAL;
 384
 385         snd_soc_update_bits(codec, MD_CTL1, PLL_MASK, pll);
 386
 387         return 0;
 388 }
 389
 390 static int ak4642_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 391 {
 392         struct snd_soc_codec *codec = dai->codec;
 393         u8 data;
 394         u8 bcko;
 395
 396         data = MCKO | PMPLL; /* use MCKO */
 397         bcko = 0;
 398
 399         /* set master/slave audio interface */
 400         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 401         case SND_SOC_DAIFMT_CBM_CFM:
 402                 data |= MS;
 403                 bcko = BCKO_64;
 404                 break;
 405         case SND_SOC_DAIFMT_CBS_CFS:
 406                 break;
 407         default:
 408                 return -EINVAL;
 409         }
 410         snd_soc_update_bits(codec, PW_MGMT2, MS | MCKO | PMPLL, data);
 411         snd_soc_update_bits(codec, MD_CTL1, BCKO_MASK, bcko);
 412
 413         /* format type */
 414         data = 0;
 415         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 416         case SND_SOC_DAIFMT_LEFT_J:
 417                 data = LEFT_J;
 418                 break;
 419         case SND_SOC_DAIFMT_I2S:
 420                 data = I2S;
 421                 break;
 422         /* FIXME
 423          * Please add RIGHT_J / DSP support here
 424          */
 425         default:
 426                 return -EINVAL;
 427         }
 428         snd_soc_update_bits(codec, MD_CTL1, DIF_MASK, data);
 429
 430         return 0;
 431 }
 432
 433 static int ak4642_set_mcko(struct snd_soc_codec *codec,
 434                            u32 frequency)
 435 {
 436         static const u32 fs_list[] = {
 437                 [0] = 8000,
 438                 [1] = 12000,
 439                 [2] = 16000,
 440                 [3] = 24000,
 441                 [4] = 7350,
 442                 [5] = 11025,
 443                 [6] = 14700,
 444                 [7] = 22050,
 445                 [10] = 32000,
 446                 [11] = 48000,
 447                 [14] = 29400,
 448                 [15] = 44100,
 449         };
 450         static const u32 ps_list[] = {
 451                 [0] = 256,
 452                 [1] = 128,
 453                 [2] = 64,
 454                 [3] = 32
 455         };
 456         int ps, fs;
 457
 458         for (ps = 0; ps < ARRAY_SIZE(ps_list); ps++) {
 459                 for (fs = 0; fs < ARRAY_SIZE(fs_list); fs++) {
 460                         if (frequency == ps_list[ps] * fs_list[fs]) {
 461                                 snd_soc_write(codec, MD_CTL2,
 462                                               PSs(ps) | FSs(fs));
 463                                 return 0;
 464                         }
 465                 }
 466         }
 467
 468         return 0;
 469 }
 470
 471 static int ak4642_dai_hw_params(struct snd_pcm_substream *substream,
 472                                 struct snd_pcm_hw_params *params,
 473                                 struct snd_soc_dai *dai)
 474 {
 475         struct snd_soc_codec *codec = dai->codec;
 476         struct ak4642_priv *priv = snd_soc_codec_get_drvdata(codec);
 477         u32 rate = clk_get_rate(priv->mcko);
 478
 479         if (!rate)
 480                 rate = params_rate(params) * 256;
 481
 482         return ak4642_set_mcko(codec, rate);
 483 }
 484
 485 static int ak4642_set_bias_level(struct snd_soc_codec *codec,
 486                                  enum snd_soc_bias_level level)
 487 {
 488         switch (level) {
 489         case SND_SOC_BIAS_OFF:
 490                 snd_soc_write(codec, PW_MGMT1, 0x00);
 491                 break;
 492         default:
 493                 snd_soc_update_bits(codec, PW_MGMT1, PMVCM, PMVCM);
 494                 break;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static const struct snd_soc_dai_ops ak4642_dai_ops = {
 501         .startup        = ak4642_dai_startup,
 502         .shutdown       = ak4642_dai_shutdown,
 503         .set_sysclk     = ak4642_dai_set_sysclk,
 504         .set_fmt        = ak4642_dai_set_fmt,
 505         .hw_params      = ak4642_dai_hw_params,
 506 };
 507
 508 static struct snd_soc_dai_driver ak4642_dai = {
 509         .name = "ak4642-hifi",
 510         .playback = {
 511                 .stream_name = "Playback",
 512                 .channels_min = 2,
 513                 .channels_max = 2,
 514                 .rates = SNDRV_PCM_RATE_8000_48000,
 515                 .formats = SNDRV_PCM_FMTBIT_S16_LE },
 516         .capture = {
 517                 .stream_name = "Capture",
 518                 .channels_min = 2,
 519                 .channels_max = 2,
 520                 .rates = SNDRV_PCM_RATE_8000_48000,
 521                 .formats = SNDRV_PCM_FMTBIT_S16_LE },
 522         .ops = &ak4642_dai_ops,
 523         .symmetric_rates = 1,
 524 };
 525
 526 static int ak4642_suspend(struct snd_soc_codec *codec)
 527 {
 528         struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
 529
 530         regcache_cache_only(regmap, true);
 531         regcache_mark_dirty(regmap);
 532         return 0;
 533 }
 534
 535 static int ak4642_resume(struct snd_soc_codec *codec)
 536 {
 537         struct regmap *regmap = dev_get_regmap(codec->dev, NULL);
 538
 539         regcache_cache_only(regmap, false);
 540         regcache_sync(regmap);
 541         return 0;
 542 }
 543 static int ak4642_probe(struct snd_soc_codec *codec)
 544 {
 545         struct ak4642_priv *priv = snd_soc_codec_get_drvdata(codec);
 546
 547         if (priv->mcko)
 548                 ak4642_set_mcko(codec, clk_get_rate(priv->mcko));
 549
 550         return 0;
 551 }
 552
 553 static const struct snd_soc_codec_driver soc_codec_dev_ak4642 = {
 554         .probe                  = ak4642_probe,
 555         .suspend                = ak4642_suspend,
 556         .resume                 = ak4642_resume,
 557         .set_bias_level         = ak4642_set_bias_level,
 558         .component_driver = {
 559                 .controls               = ak4642_snd_controls,
 560                 .num_controls           = ARRAY_SIZE(ak4642_snd_controls),
 561                 .dapm_widgets           = ak4642_dapm_widgets,
 562                 .num_dapm_widgets       = ARRAY_SIZE(ak4642_dapm_widgets),
 563                 .dapm_routes            = ak4642_intercon,
 564                 .num_dapm_routes        = ARRAY_SIZE(ak4642_intercon),
 565         },
 566 };
 567
 568 static const struct regmap_config ak4642_regmap = {
 569         .reg_bits               = 8,
 570         .val_bits               = 8,
 571         .max_register           = FIL1_3,
 572         .reg_defaults           = ak4642_reg,
 573         .num_reg_defaults       = NUM_AK4642_REG_DEFAULTS,
 574         .cache_type             = REGCACHE_RBTREE,
 575 };
 576
 577 static const struct regmap_config ak4643_regmap = {
 578         .reg_bits               = 8,
 579         .val_bits               = 8,
 580         .max_register           = SPK_MS,
 581         .reg_defaults           = ak4643_reg,
 582         .num_reg_defaults       = ARRAY_SIZE(ak4643_reg),
 583         .cache_type             = REGCACHE_RBTREE,
 584 };
 585
 586 static const struct regmap_config ak4648_regmap = {
 587         .reg_bits               = 8,
 588         .val_bits               = 8,
 589         .max_register           = EQ_FBEQE,
 590         .reg_defaults           = ak4648_reg,
 591         .num_reg_defaults       = ARRAY_SIZE(ak4648_reg),
 592         .cache_type             = REGCACHE_RBTREE,
 593 };
 594
 595 static const struct ak4642_drvdata ak4642_drvdata = {
 596         .regmap_config = &ak4642_regmap,
 597 };
 598
 599 static const struct ak4642_drvdata ak4643_drvdata = {
 600         .regmap_config = &ak4643_regmap,
 601 };
 602
 603 static const struct ak4642_drvdata ak4648_drvdata = {
 604         .regmap_config = &ak4648_regmap,
 605         .extended_frequencies = 1,
 606 };
 607
 608 #ifdef CONFIG_COMMON_CLK
 609 static struct clk *ak4642_of_parse_mcko(struct device *dev)
 610 {
 611         struct device_node *np = dev->of_node;
 612         struct clk *clk;
 613         const char *clk_name = np->name;
 614         const char *parent_clk_name = NULL;
 615         u32 rate;
 616
 617         if (of_property_read_u32(np, "clock-frequency", &rate))
 618                 return NULL;
 619
 620         if (of_property_read_bool(np, "clocks"))
 621                 parent_clk_name = of_clk_get_parent_name(np, 0);
 622
 623         of_property_read_string(np, "clock-output-names", &clk_name);
 624
 625         clk = clk_register_fixed_rate(dev, clk_name, parent_clk_name, 0, rate);
 626         if (!IS_ERR(clk))
 627                 of_clk_add_provider(np, of_clk_src_simple_get, clk);
 628
 629         return clk;
 630 }
 631 #else
 632 #define ak4642_of_parse_mcko(d) 0
 633 #endif
 634
 635 static const struct of_device_id ak4642_of_match[];
 636 static int ak4642_i2c_probe(struct i2c_client *i2c,
 637                             const struct i2c_device_id *id)
 638 {
 639         struct device *dev = &i2c->dev;
 640         struct device_node *np = dev->of_node;
 641         const struct ak4642_drvdata *drvdata = NULL;
 642         struct regmap *regmap;
 643         struct ak4642_priv *priv;
 644         struct clk *mcko = NULL;
 645
 646         if (np) {
 647                 const struct of_device_id *of_id;
 648
 649                 mcko = ak4642_of_parse_mcko(dev);
 650                 if (IS_ERR(mcko))
 651                         mcko = NULL;
 652
 653                 of_id = of_match_device(ak4642_of_match, dev);
 654                 if (of_id)
 655                         drvdata = of_id->data;
 656         } else {
 657                 drvdata = (const struct ak4642_drvdata *)id->driver_data;
 658         }
 659
 660         if (!drvdata) {
 661                 dev_err(dev, "Unknown device type\n");
 662                 return -EINVAL;
 663         }
 664
 665         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 666         if (!priv)
 667                 return -ENOMEM;
 668
 669         priv->drvdata = drvdata;
 670         priv->mcko = mcko;
 671
 672         i2c_set_clientdata(i2c, priv);
 673
 674         regmap = devm_regmap_init_i2c(i2c, drvdata->regmap_config);
 675         if (IS_ERR(regmap))
 676                 return PTR_ERR(regmap);
 677
 678         return snd_soc_register_codec(dev,
 679                                       &soc_codec_dev_ak4642, &ak4642_dai, 1);
 680 }
 681
 682 static int ak4642_i2c_remove(struct i2c_client *client)
 683 {
 684         snd_soc_unregister_codec(&client->dev);
 685         return 0;
 686 }
 687
 688 static const struct of_device_id ak4642_of_match[] = {
 689         { .compatible = "asahi-kasei,ak4642",   .data = &ak4642_drvdata},
 690         { .compatible = "asahi-kasei,ak4643",   .data = &ak4643_drvdata},
 691         { .compatible = "asahi-kasei,ak4648",   .data = &ak4648_drvdata},
 692         {},
 693 };
 694 MODULE_DEVICE_TABLE(of, ak4642_of_match);
 695
 696 static const struct i2c_device_id ak4642_i2c_id[] = {
 697         { "ak4642", (kernel_ulong_t)&ak4642_drvdata },
 698         { "ak4643", (kernel_ulong_t)&ak4643_drvdata },
 699         { "ak4648", (kernel_ulong_t)&ak4648_drvdata },
 700         { }
 701 };
 702 MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id);
 703
 704 static struct i2c_driver ak4642_i2c_driver = {
 705         .driver = {
 706                 .name = "ak4642-codec",
 707                 .of_match_table = ak4642_of_match,
 708         },
 709         .probe          = ak4642_i2c_probe,
 710         .remove         = ak4642_i2c_remove,
 711         .id_table       = ak4642_i2c_id,
 712 };
 713
 714 module_i2c_driver(ak4642_i2c_driver);
 715
 716 MODULE_DESCRIPTION("Soc AK4642 driver");
 717 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
 718 MODULE_LICENSE("GPL");