sound/soc/codecs/max9860.c

   1 /*
   2  * Driver for the MAX9860 Mono Audio Voice Codec
   3  *
   4  * https://datasheets.maximintegrated.com/en/ds/MAX9860.pdf
   5  *
   6  * The driver does not support sidetone since the DVST register field is
   7  * backwards with the mute near the maximum level instead of the minimum.
   8  *
   9  * Author: Peter Rosin <peda@axentia.s>
  10  *         Copyright 2016 Axentia Technologies
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * version 2 as published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  */
  21
  22 #include <linux/init.h>
  23 #include <linux/module.h>
  24 #include <linux/clk.h>
  25 #include <linux/kernel.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/regmap.h>
  28 #include <linux/i2c.h>
  29 #include <linux/regulator/consumer.h>
  30 #include <sound/soc.h>
  31 #include <sound/soc-dapm.h>
  32 #include <sound/pcm_params.h>
  33 #include <sound/tlv.h>
  34
  35 #include "max9860.h"
  36
  37 struct max9860_priv {
  38         struct regmap *regmap;
  39         struct regulator *dvddio;
  40         struct notifier_block dvddio_nb;
  41         u8 psclk;
  42         unsigned long pclk_rate;
  43         int fmt;
  44 };
  45
  46 static int max9860_dvddio_event(struct notifier_block *nb,
  47                                 unsigned long event, void *data)
  48 {
  49         struct max9860_priv *max9860 = container_of(nb, struct max9860_priv,
  50                                                     dvddio_nb);
  51         if (event & REGULATOR_EVENT_DISABLE) {
  52                 regcache_mark_dirty(max9860->regmap);
  53                 regcache_cache_only(max9860->regmap, true);
  54         }
  55
  56         return 0;
  57 }
  58
  59 static const struct reg_default max9860_reg_defaults[] = {
  60         { MAX9860_PWRMAN,       0x00 },
  61         { MAX9860_INTEN,        0x00 },
  62         { MAX9860_SYSCLK,       0x00 },
  63         { MAX9860_AUDIOCLKHIGH, 0x00 },
  64         { MAX9860_AUDIOCLKLOW,  0x00 },
  65         { MAX9860_IFC1A,        0x00 },
  66         { MAX9860_IFC1B,        0x00 },
  67         { MAX9860_VOICEFLTR,    0x00 },
  68         { MAX9860_DACATTN,      0x00 },
  69         { MAX9860_ADCLEVEL,     0x00 },
  70         { MAX9860_DACGAIN,      0x00 },
  71         { MAX9860_MICGAIN,      0x00 },
  72         { MAX9860_MICADC,       0x00 },
  73         { MAX9860_NOISEGATE,    0x00 },
  74 };
  75
  76 static bool max9860_readable(struct device *dev, unsigned int reg)
  77 {
  78         switch (reg) {
  79         case MAX9860_INTRSTATUS ... MAX9860_MICGAIN:
  80         case MAX9860_MICADC ... MAX9860_PWRMAN:
  81         case MAX9860_REVISION:
  82                 return true;
  83         }
  84
  85         return false;
  86 }
  87
  88 static bool max9860_writeable(struct device *dev, unsigned int reg)
  89 {
  90         switch (reg) {
  91         case MAX9860_INTEN ... MAX9860_MICGAIN:
  92         case MAX9860_MICADC ... MAX9860_PWRMAN:
  93                 return true;
  94         }
  95
  96         return false;
  97 }
  98
  99 static bool max9860_volatile(struct device *dev, unsigned int reg)
 100 {
 101         switch (reg) {
 102         case MAX9860_INTRSTATUS:
 103         case MAX9860_MICREADBACK:
 104                 return true;
 105         }
 106
 107         return false;
 108 }
 109
 110 static bool max9860_precious(struct device *dev, unsigned int reg)
 111 {
 112         switch (reg) {
 113         case MAX9860_INTRSTATUS:
 114                 return true;
 115         }
 116
 117         return false;
 118 }
 119
 120 static const struct regmap_config max9860_regmap = {
 121         .reg_bits = 8,
 122         .val_bits = 8,
 123
 124         .readable_reg = max9860_readable,
 125         .writeable_reg = max9860_writeable,
 126         .volatile_reg = max9860_volatile,
 127         .precious_reg = max9860_precious,
 128
 129         .max_register = MAX9860_MAX_REGISTER,
 130         .reg_defaults = max9860_reg_defaults,
 131         .num_reg_defaults = ARRAY_SIZE(max9860_reg_defaults),
 132         .cache_type = REGCACHE_RBTREE,
 133 };
 134
 135 static const DECLARE_TLV_DB_SCALE(dva_tlv, -9100, 100, 1);
 136 static const DECLARE_TLV_DB_SCALE(dvg_tlv, 0, 600, 0);
 137 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
 138 static const DECLARE_TLV_DB_RANGE(pam_tlv,
 139         0, MAX9860_PAM_MAX - 1,             TLV_DB_SCALE_ITEM(-2000, 2000, 1),
 140         MAX9860_PAM_MAX, MAX9860_PAM_MAX,   TLV_DB_SCALE_ITEM(3000, 0, 0));
 141 static const DECLARE_TLV_DB_SCALE(pgam_tlv, 0, 100, 0);
 142 static const DECLARE_TLV_DB_SCALE(anth_tlv, -7600, 400, 1);
 143 static const DECLARE_TLV_DB_SCALE(agcth_tlv, -1800, 100, 0);
 144
 145 static const char * const agchld_text[] = {
 146         "AGC Disabled", "50ms", "100ms", "400ms"
 147 };
 148
 149 static SOC_ENUM_SINGLE_DECL(agchld_enum, MAX9860_MICADC,
 150                             MAX9860_AGCHLD_SHIFT, agchld_text);
 151
 152 static const char * const agcsrc_text[] = {
 153         "Left ADC", "Left/Right ADC"
 154 };
 155
 156 static SOC_ENUM_SINGLE_DECL(agcsrc_enum, MAX9860_MICADC,
 157                             MAX9860_AGCSRC_SHIFT, agcsrc_text);
 158
 159 static const char * const agcatk_text[] = {
 160         "3ms", "12ms", "50ms", "200ms"
 161 };
 162
 163 static SOC_ENUM_SINGLE_DECL(agcatk_enum, MAX9860_MICADC,
 164                             MAX9860_AGCATK_SHIFT, agcatk_text);
 165
 166 static const char * const agcrls_text[] = {
 167         "78ms", "156ms", "312ms", "625ms",
 168         "1.25s", "2.5s", "5s", "10s"
 169 };
 170
 171 static SOC_ENUM_SINGLE_DECL(agcrls_enum, MAX9860_MICADC,
 172                             MAX9860_AGCRLS_SHIFT, agcrls_text);
 173
 174 static const char * const filter_text[] = {
 175         "Disabled",
 176         "Elliptical HP 217Hz notch (16kHz)",
 177         "Butterworth HP 500Hz (16kHz)",
 178         "Elliptical HP 217Hz notch (8kHz)",
 179         "Butterworth HP 500Hz (8kHz)",
 180         "Butterworth HP 200Hz (48kHz)"
 181 };
 182
 183 static SOC_ENUM_SINGLE_DECL(avflt_enum, MAX9860_VOICEFLTR,
 184                             MAX9860_AVFLT_SHIFT, filter_text);
 185
 186 static SOC_ENUM_SINGLE_DECL(dvflt_enum, MAX9860_VOICEFLTR,
 187                             MAX9860_DVFLT_SHIFT, filter_text);
 188
 189 static const struct snd_kcontrol_new max9860_controls[] = {
 190 SOC_SINGLE_TLV("Master Playback Volume", MAX9860_DACATTN,
 191                MAX9860_DVA_SHIFT, MAX9860_DVA_MUTE, 1, dva_tlv),
 192 SOC_SINGLE_TLV("DAC Gain Volume", MAX9860_DACGAIN,
 193                MAX9860_DVG_SHIFT, MAX9860_DVG_MAX, 0, dvg_tlv),
 194 SOC_DOUBLE_TLV("Line Capture Volume", MAX9860_ADCLEVEL,
 195                MAX9860_ADCLL_SHIFT, MAX9860_ADCRL_SHIFT, MAX9860_ADCxL_MIN, 1,
 196                adc_tlv),
 197
 198 SOC_ENUM("AGC Hold Time", agchld_enum),
 199 SOC_ENUM("AGC/Noise Gate Source", agcsrc_enum),
 200 SOC_ENUM("AGC Attack Time", agcatk_enum),
 201 SOC_ENUM("AGC Release Time", agcrls_enum),
 202
 203 SOC_SINGLE_TLV("Noise Gate Threshold Volume", MAX9860_NOISEGATE,
 204                MAX9860_ANTH_SHIFT, MAX9860_ANTH_MAX, 0, anth_tlv),
 205 SOC_SINGLE_TLV("AGC Signal Threshold Volume", MAX9860_NOISEGATE,
 206                MAX9860_AGCTH_SHIFT, MAX9860_AGCTH_MIN, 1, agcth_tlv),
 207
 208 SOC_SINGLE_TLV("Mic PGA Volume", MAX9860_MICGAIN,
 209                MAX9860_PGAM_SHIFT, MAX9860_PGAM_MIN, 1, pgam_tlv),
 210 SOC_SINGLE_TLV("Mic Preamp Volume", MAX9860_MICGAIN,
 211                MAX9860_PAM_SHIFT, MAX9860_PAM_MAX, 0, pam_tlv),
 212
 213 SOC_ENUM("ADC Filter", avflt_enum),
 214 SOC_ENUM("DAC Filter", dvflt_enum),
 215 };
 216
 217 static const struct snd_soc_dapm_widget max9860_dapm_widgets[] = {
 218 SND_SOC_DAPM_INPUT("MICL"),
 219 SND_SOC_DAPM_INPUT("MICR"),
 220
 221 SND_SOC_DAPM_ADC("ADCL", NULL, MAX9860_PWRMAN, MAX9860_ADCLEN_SHIFT, 0),
 222 SND_SOC_DAPM_ADC("ADCR", NULL, MAX9860_PWRMAN, MAX9860_ADCREN_SHIFT, 0),
 223
 224 SND_SOC_DAPM_AIF_OUT("AIFOUTL", "Capture", 0, SND_SOC_NOPM, 0, 0),
 225 SND_SOC_DAPM_AIF_OUT("AIFOUTR", "Capture", 1, SND_SOC_NOPM, 0, 0),
 226
 227 SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0),
 228 SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0),
 229
 230 SND_SOC_DAPM_DAC("DAC", NULL, MAX9860_PWRMAN, MAX9860_DACEN_SHIFT, 0),
 231
 232 SND_SOC_DAPM_OUTPUT("OUT"),
 233
 234 SND_SOC_DAPM_SUPPLY("Supply", SND_SOC_NOPM, 0, 0,
 235                     NULL, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 236 SND_SOC_DAPM_REGULATOR_SUPPLY("AVDD", 0, 0),
 237 SND_SOC_DAPM_REGULATOR_SUPPLY("DVDD", 0, 0),
 238 SND_SOC_DAPM_CLOCK_SUPPLY("mclk"),
 239 };
 240
 241 static const struct snd_soc_dapm_route max9860_dapm_routes[] = {
 242         { "ADCL", NULL, "MICL" },
 243         { "ADCR", NULL, "MICR" },
 244         { "AIFOUTL", NULL, "ADCL" },
 245         { "AIFOUTR", NULL, "ADCR" },
 246
 247         { "DAC", NULL, "AIFINL" },
 248         { "DAC", NULL, "AIFINR" },
 249         { "OUT", NULL, "DAC" },
 250
 251         { "Supply", NULL, "AVDD" },
 252         { "Supply", NULL, "DVDD" },
 253         { "Supply", NULL, "mclk" },
 254
 255         { "DAC", NULL, "Supply" },
 256         { "ADCL", NULL, "Supply" },
 257         { "ADCR", NULL, "Supply" },
 258 };
 259
 260 static int max9860_hw_params(struct snd_pcm_substream *substream,
 261                              struct snd_pcm_hw_params *params,
 262                              struct snd_soc_dai *dai)
 263 {
 264         struct snd_soc_codec *codec = dai->codec;
 265         struct max9860_priv *max9860 = snd_soc_codec_get_drvdata(codec);
 266         u8 master;
 267         u8 ifc1a = 0;
 268         u8 ifc1b = 0;
 269         u8 sysclk = 0;
 270         unsigned long n;
 271         int ret;
 272
 273         dev_dbg(codec->dev, "hw_params %u Hz, %u channels\n",
 274                 params_rate(params),
 275                 params_channels(params));
 276
 277         if (params_channels(params) == 2)
 278                 ifc1b |= MAX9860_ST;
 279
 280         switch (max9860->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 281         case SND_SOC_DAIFMT_CBS_CFS:
 282                 master = 0;
 283                 break;
 284         case SND_SOC_DAIFMT_CBM_CFM:
 285                 master = MAX9860_MASTER;
 286                 break;
 287         default:
 288                 return -EINVAL;
 289         }
 290         ifc1a |= master;
 291
 292         if (master) {
 293                 if (params_width(params) * params_channels(params) > 48)
 294                         ifc1b |= MAX9860_BSEL_64X;
 295                 else
 296                         ifc1b |= MAX9860_BSEL_48X;
 297         }
 298
 299         switch (max9860->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 300         case SND_SOC_DAIFMT_I2S:
 301                 ifc1a |= MAX9860_DDLY;
 302                 ifc1b |= MAX9860_ADLY;
 303                 break;
 304         case SND_SOC_DAIFMT_LEFT_J:
 305                 ifc1a |= MAX9860_WCI;
 306                 break;
 307         case SND_SOC_DAIFMT_DSP_A:
 308                 if (params_width(params) != 16) {
 309                         dev_err(codec->dev,
 310                                 "DSP_A works for 16 bits per sample only.\n");
 311                         return -EINVAL;
 312                 }
 313                 ifc1a |= MAX9860_DDLY | MAX9860_WCI | MAX9860_HIZ | MAX9860_TDM;
 314                 ifc1b |= MAX9860_ADLY;
 315                 break;
 316         case SND_SOC_DAIFMT_DSP_B:
 317                 if (params_width(params) != 16) {
 318                         dev_err(codec->dev,
 319                                 "DSP_B works for 16 bits per sample only.\n");
 320                         return -EINVAL;
 321                 }
 322                 ifc1a |= MAX9860_WCI | MAX9860_HIZ | MAX9860_TDM;
 323                 break;
 324         default:
 325                 return -EINVAL;
 326         }
 327
 328         switch (max9860->fmt & SND_SOC_DAIFMT_INV_MASK) {
 329         case SND_SOC_DAIFMT_NB_NF:
 330                 break;
 331         case SND_SOC_DAIFMT_NB_IF:
 332                 switch (max9860->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 333                 case SND_SOC_DAIFMT_DSP_A:
 334                 case SND_SOC_DAIFMT_DSP_B:
 335                         return -EINVAL;
 336                 }
 337                 ifc1a ^= MAX9860_WCI;
 338                 break;
 339         case SND_SOC_DAIFMT_IB_IF:
 340                 switch (max9860->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 341                 case SND_SOC_DAIFMT_DSP_A:
 342                 case SND_SOC_DAIFMT_DSP_B:
 343                         return -EINVAL;
 344                 }
 345                 ifc1a ^= MAX9860_WCI;
 346                 /* fall through */
 347         case SND_SOC_DAIFMT_IB_NF:
 348                 ifc1a ^= MAX9860_DBCI;
 349                 ifc1b ^= MAX9860_ABCI;
 350                 break;
 351         default:
 352                 return -EINVAL;
 353         }
 354
 355         dev_dbg(codec->dev, "IFC1A  %02x\n", ifc1a);
 356         ret = regmap_write(max9860->regmap, MAX9860_IFC1A, ifc1a);
 357         if (ret) {
 358                 dev_err(codec->dev, "Failed to set IFC1A: %d\n", ret);
 359                 return ret;
 360         }
 361         dev_dbg(codec->dev, "IFC1B  %02x\n", ifc1b);
 362         ret = regmap_write(max9860->regmap, MAX9860_IFC1B, ifc1b);
 363         if (ret) {
 364                 dev_err(codec->dev, "Failed to set IFC1B: %d\n", ret);
 365                 return ret;
 366         }
 367
 368         /*
 369          * Check if Integer Clock Mode is possible, but avoid it in slave mode
 370          * since we then do not know if lrclk is derived from pclk and the
 371          * datasheet mentions that the frequencies have to match exactly in
 372          * order for this to work.
 373          */
 374         if (params_rate(params) == 8000 || params_rate(params) == 16000) {
 375                 if (master) {
 376                         switch (max9860->pclk_rate) {
 377                         case 12000000:
 378                                 sysclk = MAX9860_FREQ_12MHZ;
 379                                 break;
 380                         case 13000000:
 381                                 sysclk = MAX9860_FREQ_13MHZ;
 382                                 break;
 383                         case 19200000:
 384                                 sysclk = MAX9860_FREQ_19_2MHZ;
 385                                 break;
 386                         default:
 387                                 /*
 388                                  * Integer Clock Mode not possible. Leave
 389                                  * sysclk at zero and fall through to the
 390                                  * code below for PLL mode.
 391                                  */
 392                                 break;
 393                         }
 394
 395                         if (sysclk && params_rate(params) == 16000)
 396                                 sysclk |= MAX9860_16KHZ;
 397                 }
 398         }
 399
 400         /*
 401          * Largest possible n:
 402          *    65536 * 96 * 48kHz / 10MHz -> 30199
 403          * Smallest possible n:
 404          *    65536 * 96 *  8kHz / 20MHz -> 2517
 405          * Both fit nicely in the available 15 bits, no need to apply any mask.
 406          */
 407         n = DIV_ROUND_CLOSEST_ULL(65536ULL * 96 * params_rate(params),
 408                                   max9860->pclk_rate);
 409
 410         if (!sysclk) {
 411                 /* PLL mode */
 412                 if (params_rate(params) > 24000)
 413                         sysclk |= MAX9860_16KHZ;
 414
 415                 if (!master)
 416                         n |= 1; /* trigger rapid pll lock mode */
 417         }
 418
 419         sysclk |= max9860->psclk;
 420         dev_dbg(codec->dev, "SYSCLK %02x\n", sysclk);
 421         ret = regmap_write(max9860->regmap,
 422                            MAX9860_SYSCLK, sysclk);
 423         if (ret) {
 424                 dev_err(codec->dev, "Failed to set SYSCLK: %d\n", ret);
 425                 return ret;
 426         }
 427         dev_dbg(codec->dev, "N %lu\n", n);
 428         ret = regmap_write(max9860->regmap,
 429                            MAX9860_AUDIOCLKHIGH, n >> 8);
 430         if (ret) {
 431                 dev_err(codec->dev, "Failed to set NHI: %d\n", ret);
 432                 return ret;
 433         }
 434         ret = regmap_write(max9860->regmap,
 435                            MAX9860_AUDIOCLKLOW, n & 0xff);
 436         if (ret) {
 437                 dev_err(codec->dev, "Failed to set NLO: %d\n", ret);
 438                 return ret;
 439         }
 440
 441         if (!master) {
 442                 dev_dbg(codec->dev, "Enable PLL\n");
 443                 ret = regmap_update_bits(max9860->regmap, MAX9860_AUDIOCLKHIGH,
 444                                          MAX9860_PLL, MAX9860_PLL);
 445                 if (ret) {
 446                         dev_err(codec->dev, "Failed to enable PLL: %d\n", ret);
 447                         return ret;
 448                 }
 449         }
 450
 451         return 0;
 452 }
 453
 454 static int max9860_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 455 {
 456         struct snd_soc_codec *codec = dai->codec;
 457         struct max9860_priv *max9860 = snd_soc_codec_get_drvdata(codec);
 458
 459         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 460         case SND_SOC_DAIFMT_CBM_CFM:
 461         case SND_SOC_DAIFMT_CBS_CFS:
 462                 max9860->fmt = fmt;
 463                 return 0;
 464
 465         default:
 466                 return -EINVAL;
 467         }
 468 }
 469
 470 static const struct snd_soc_dai_ops max9860_dai_ops = {
 471         .hw_params = max9860_hw_params,
 472         .set_fmt = max9860_set_fmt,
 473 };
 474
 475 static struct snd_soc_dai_driver max9860_dai = {
 476         .name = "max9860-hifi",
 477         .playback = {
 478                 .stream_name = "Playback",
 479                 .channels_min = 1,
 480                 .channels_max = 2,
 481                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
 482                 .rate_min = 8000,
 483                 .rate_max = 48000,
 484                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
 485                            SNDRV_PCM_FMTBIT_S24_LE |
 486                            SNDRV_PCM_FMTBIT_S32_LE,
 487         },
 488         .capture = {
 489                 .stream_name = "Capture",
 490                 .channels_min = 1,
 491                 .channels_max = 2,
 492                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
 493                 .rate_min = 8000,
 494                 .rate_max = 48000,
 495                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
 496                            SNDRV_PCM_FMTBIT_S24_LE |
 497                            SNDRV_PCM_FMTBIT_S32_LE,
 498         },
 499         .ops = &max9860_dai_ops,
 500         .symmetric_rates = 1,
 501 };
 502
 503 static int max9860_set_bias_level(struct snd_soc_codec *codec,
 504                                   enum snd_soc_bias_level level)
 505 {
 506         struct max9860_priv *max9860 = dev_get_drvdata(codec->dev);
 507         int ret;
 508
 509         switch (level) {
 510         case SND_SOC_BIAS_ON:
 511         case SND_SOC_BIAS_PREPARE:
 512                 break;
 513
 514         case SND_SOC_BIAS_STANDBY:
 515                 ret = regmap_update_bits(max9860->regmap, MAX9860_PWRMAN,
 516                                          MAX9860_SHDN, MAX9860_SHDN);
 517                 if (ret) {
 518                         dev_err(codec->dev, "Failed to remove SHDN: %d\n", ret);
 519                         return ret;
 520                 }
 521                 break;
 522
 523         case SND_SOC_BIAS_OFF:
 524                 ret = regmap_update_bits(max9860->regmap, MAX9860_PWRMAN,
 525                                          MAX9860_SHDN, 0);
 526                 if (ret) {
 527                         dev_err(codec->dev, "Failed to request SHDN: %d\n",
 528                                 ret);
 529                         return ret;
 530                 }
 531                 break;
 532         }
 533
 534         return 0;
 535 }
 536
 537 static struct snd_soc_codec_driver max9860_codec_driver = {
 538         .set_bias_level = max9860_set_bias_level,
 539         .idle_bias_off = true,
 540
 541         .controls = max9860_controls,
 542         .num_controls = ARRAY_SIZE(max9860_controls),
 543         .dapm_widgets = max9860_dapm_widgets,
 544         .num_dapm_widgets = ARRAY_SIZE(max9860_dapm_widgets),
 545         .dapm_routes = max9860_dapm_routes,
 546         .num_dapm_routes = ARRAY_SIZE(max9860_dapm_routes),
 547 };
 548
 549 #ifdef CONFIG_PM
 550 static int max9860_suspend(struct device *dev)
 551 {
 552         struct max9860_priv *max9860 = dev_get_drvdata(dev);
 553         int ret;
 554
 555         ret = regmap_update_bits(max9860->regmap, MAX9860_SYSCLK,
 556                                  MAX9860_PSCLK, MAX9860_PSCLK_OFF);
 557         if (ret) {
 558                 dev_err(dev, "Failed to disable clock: %d\n", ret);
 559                 return ret;
 560         }
 561
 562         regulator_disable(max9860->dvddio);
 563
 564         return 0;
 565 }
 566
 567 static int max9860_resume(struct device *dev)
 568 {
 569         struct max9860_priv *max9860 = dev_get_drvdata(dev);
 570         int ret;
 571
 572         ret = regulator_enable(max9860->dvddio);
 573         if (ret) {
 574                 dev_err(dev, "Failed to enable DVDDIO: %d\n", ret);
 575                 return ret;
 576         }
 577
 578         regcache_cache_only(max9860->regmap, false);
 579         ret = regcache_sync(max9860->regmap);
 580         if (ret) {
 581                 dev_err(dev, "Failed to sync cache: %d\n", ret);
 582                 return ret;
 583         }
 584
 585         ret = regmap_update_bits(max9860->regmap, MAX9860_SYSCLK,
 586                                  MAX9860_PSCLK, max9860->psclk);
 587         if (ret) {
 588                 dev_err(dev, "Failed to enable clock: %d\n", ret);
 589                 return ret;
 590         }
 591
 592         return 0;
 593 }
 594 #endif
 595
 596 static const struct dev_pm_ops max9860_pm_ops = {
 597         SET_RUNTIME_PM_OPS(max9860_suspend, max9860_resume, NULL)
 598 };
 599
 600 static int max9860_probe(struct i2c_client *i2c,
 601                          const struct i2c_device_id *id)
 602 {
 603         struct device *dev = &i2c->dev;
 604         struct max9860_priv *max9860;
 605         int ret;
 606         struct clk *mclk;
 607         unsigned long mclk_rate;
 608         int i;
 609         int intr;
 610
 611         max9860 = devm_kzalloc(dev, sizeof(struct max9860_priv), GFP_KERNEL);
 612         if (!max9860)
 613                 return -ENOMEM;
 614
 615         max9860->dvddio = devm_regulator_get(dev, "DVDDIO");
 616         if (IS_ERR(max9860->dvddio)) {
 617                 ret = PTR_ERR(max9860->dvddio);
 618                 if (ret != -EPROBE_DEFER)
 619                         dev_err(dev, "Failed to get DVDDIO supply: %d\n", ret);
 620                 return ret;
 621         }
 622
 623         max9860->dvddio_nb.notifier_call = max9860_dvddio_event;
 624
 625         ret = regulator_register_notifier(max9860->dvddio, &max9860->dvddio_nb);
 626         if (ret)
 627                 dev_err(dev, "Failed to register DVDDIO notifier: %d\n", ret);
 628
 629         ret = regulator_enable(max9860->dvddio);
 630         if (ret != 0) {
 631                 dev_err(dev, "Failed to enable DVDDIO: %d\n", ret);
 632                 return ret;
 633         }
 634
 635         max9860->regmap = devm_regmap_init_i2c(i2c, &max9860_regmap);
 636         if (IS_ERR(max9860->regmap)) {
 637                 ret = PTR_ERR(max9860->regmap);
 638                 goto err_regulator;
 639         }
 640
 641         dev_set_drvdata(dev, max9860);
 642
 643         /*
 644          * mclk has to be in the 10MHz to 60MHz range.
 645          * psclk is used to scale mclk into pclk so that
 646          * pclk is in the 10MHz to 20MHz range.
 647          */
 648         mclk = clk_get(dev, "mclk");
 649
 650         if (IS_ERR(mclk)) {
 651                 ret = PTR_ERR(mclk);
 652                 if (ret != -EPROBE_DEFER)
 653                         dev_err(dev, "Failed to get MCLK: %d\n", ret);
 654                 goto err_regulator;
 655         }
 656
 657         mclk_rate = clk_get_rate(mclk);
 658         clk_put(mclk);
 659
 660         if (mclk_rate > 60000000 || mclk_rate < 10000000) {
 661                 dev_err(dev, "Bad mclk %luHz (needs 10MHz - 60MHz)\n",
 662                         mclk_rate);
 663                 ret = -EINVAL;
 664                 goto err_regulator;
 665         }
 666         if (mclk_rate >= 40000000)
 667                 max9860->psclk = 3;
 668         else if (mclk_rate >= 20000000)
 669                 max9860->psclk = 2;
 670         else
 671                 max9860->psclk = 1;
 672         max9860->pclk_rate = mclk_rate >> (max9860->psclk - 1);
 673         max9860->psclk <<= MAX9860_PSCLK_SHIFT;
 674         dev_dbg(dev, "mclk %lu pclk %lu\n", mclk_rate, max9860->pclk_rate);
 675
 676         regcache_cache_bypass(max9860->regmap, true);
 677         for (i = 0; i < max9860_regmap.num_reg_defaults; ++i) {
 678                 ret = regmap_write(max9860->regmap,
 679                                    max9860_regmap.reg_defaults[i].reg,
 680                                    max9860_regmap.reg_defaults[i].def);
 681                 if (ret) {
 682                         dev_err(dev, "Failed to initialize register %u: %d\n",
 683                                 max9860_regmap.reg_defaults[i].reg, ret);
 684                         goto err_regulator;
 685                 }
 686         }
 687         regcache_cache_bypass(max9860->regmap, false);
 688
 689         ret = regmap_read(max9860->regmap, MAX9860_INTRSTATUS, &intr);
 690         if (ret) {
 691                 dev_err(dev, "Failed to clear INTRSTATUS: %d\n", ret);
 692                 goto err_regulator;
 693         }
 694
 695         pm_runtime_set_active(dev);
 696         pm_runtime_enable(dev);
 697         pm_runtime_idle(dev);
 698
 699         ret = snd_soc_register_codec(dev, &max9860_codec_driver,
 700                                      &max9860_dai, 1);
 701         if (ret) {
 702                 dev_err(dev, "Failed to register CODEC: %d\n", ret);
 703                 goto err_pm;
 704         }
 705
 706         return 0;
 707
 708 err_pm:
 709         pm_runtime_disable(dev);
 710 err_regulator:
 711         regulator_disable(max9860->dvddio);
 712         return ret;
 713 }
 714
 715 static int max9860_remove(struct i2c_client *i2c)
 716 {
 717         struct device *dev = &i2c->dev;
 718         struct max9860_priv *max9860 = dev_get_drvdata(dev);
 719
 720         snd_soc_unregister_codec(dev);
 721         pm_runtime_disable(dev);
 722         regulator_disable(max9860->dvddio);
 723         return 0;
 724 }
 725
 726 static const struct i2c_device_id max9860_i2c_id[] = {
 727         { "max9860", },
 728         { }
 729 };
 730 MODULE_DEVICE_TABLE(i2c, max9860_i2c_id);
 731
 732 static const struct of_device_id max9860_of_match[] = {
 733         { .compatible = "maxim,max9860", },
 734         { }
 735 };
 736 MODULE_DEVICE_TABLE(of, max9860_of_match);
 737
 738 static struct i2c_driver max9860_i2c_driver = {
 739         .probe          = max9860_probe,
 740         .remove         = max9860_remove,
 741         .id_table       = max9860_i2c_id,
 742         .driver         = {
 743                 .name           = "max9860",
 744                 .of_match_table = max9860_of_match,
 745                 .pm             = &max9860_pm_ops,
 746         },
 747 };
 748
 749 module_i2c_driver(max9860_i2c_driver);
 750
 751 MODULE_DESCRIPTION("ASoC MAX9860 Mono Audio Voice Codec driver");
 752 MODULE_AUTHOR("Peter Rosin <peda@axentia.se>");
 753 MODULE_LICENSE("GPL v2");