sound/soc/codecs/wm8804.c

   1 /*
   2  * wm8804.c  --  WM8804 S/PDIF transceiver driver
   3  *
   4  * Copyright 2010-11 Wolfson Microelectronics plc
   5  *
   6  * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/init.h>
  16 #include <linux/delay.h>
  17 #include <linux/pm.h>
  18 #include <linux/i2c.h>
  19 #include <linux/of_device.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/regmap.h>
  22 #include <linux/regulator/consumer.h>
  23 #include <linux/slab.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/soc.h>
  28 #include <sound/initval.h>
  29 #include <sound/tlv.h>
  30
  31 #include "wm8804.h"
  32
  33 #define WM8804_NUM_SUPPLIES 2
  34 static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = {
  35         "PVDD",
  36         "DVDD"
  37 };
  38
  39 static const struct reg_default wm8804_reg_defaults[] = {
  40         { 3,  0x21 },     /* R3  - PLL1 */
  41         { 4,  0xFD },     /* R4  - PLL2 */
  42         { 5,  0x36 },     /* R5  - PLL3 */
  43         { 6,  0x07 },     /* R6  - PLL4 */
  44         { 7,  0x16 },     /* R7  - PLL5 */
  45         { 8,  0x18 },     /* R8  - PLL6 */
  46         { 9,  0xFF },     /* R9  - SPDMODE */
  47         { 10, 0x00 },     /* R10 - INTMASK */
  48         { 18, 0x00 },     /* R18 - SPDTX1 */
  49         { 19, 0x00 },     /* R19 - SPDTX2 */
  50         { 20, 0x00 },     /* R20 - SPDTX3 */
  51         { 21, 0x71 },     /* R21 - SPDTX4 */
  52         { 22, 0x0B },     /* R22 - SPDTX5 */
  53         { 23, 0x70 },     /* R23 - GPO0 */
  54         { 24, 0x57 },     /* R24 - GPO1 */
  55         { 26, 0x42 },     /* R26 - GPO2 */
  56         { 27, 0x06 },     /* R27 - AIFTX */
  57         { 28, 0x06 },     /* R28 - AIFRX */
  58         { 29, 0x80 },     /* R29 - SPDRX1 */
  59         { 30, 0x07 },     /* R30 - PWRDN */
  60 };
  61
  62 struct wm8804_priv {
  63         struct regmap *regmap;
  64         struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES];
  65         struct notifier_block disable_nb[WM8804_NUM_SUPPLIES];
  66         int mclk_div;
  67 };
  68
  69 static int txsrc_get(struct snd_kcontrol *kcontrol,
  70                      struct snd_ctl_elem_value *ucontrol);
  71
  72 static int txsrc_put(struct snd_kcontrol *kcontrol,
  73                      struct snd_ctl_elem_value *ucontrol);
  74
  75 /*
  76  * We can't use the same notifier block for more than one supply and
  77  * there's no way I can see to get from a callback to the caller
  78  * except container_of().
  79  */
  80 #define WM8804_REGULATOR_EVENT(n) \
  81 static int wm8804_regulator_event_##n(struct notifier_block *nb, \
  82                                       unsigned long event, void *data)    \
  83 { \
  84         struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \
  85                                                   disable_nb[n]); \
  86         if (event & REGULATOR_EVENT_DISABLE) { \
  87                 regcache_mark_dirty(wm8804->regmap);    \
  88         } \
  89         return 0; \
  90 }
  91
  92 WM8804_REGULATOR_EVENT(0)
  93 WM8804_REGULATOR_EVENT(1)
  94
  95 static const char *txsrc_text[] = { "S/PDIF RX", "AIF" };
  96 static SOC_ENUM_SINGLE_EXT_DECL(txsrc, txsrc_text);
  97
  98 static const struct snd_kcontrol_new wm8804_snd_controls[] = {
  99         SOC_ENUM_EXT("Input Source", txsrc, txsrc_get, txsrc_put),
 100         SOC_SINGLE("TX Playback Switch", WM8804_PWRDN, 2, 1, 1),
 101         SOC_SINGLE("AIF Playback Switch", WM8804_PWRDN, 4, 1, 1)
 102 };
 103
 104 static int txsrc_get(struct snd_kcontrol *kcontrol,
 105                      struct snd_ctl_elem_value *ucontrol)
 106 {
 107         struct snd_soc_codec *codec;
 108         unsigned int src;
 109
 110         codec = snd_soc_kcontrol_codec(kcontrol);
 111         src = snd_soc_read(codec, WM8804_SPDTX4);
 112         if (src & 0x40)
 113                 ucontrol->value.integer.value[0] = 1;
 114         else
 115                 ucontrol->value.integer.value[0] = 0;
 116
 117         return 0;
 118 }
 119
 120 static int txsrc_put(struct snd_kcontrol *kcontrol,
 121                      struct snd_ctl_elem_value *ucontrol)
 122 {
 123         struct snd_soc_codec *codec;
 124         unsigned int src, txpwr;
 125
 126         codec = snd_soc_kcontrol_codec(kcontrol);
 127
 128         if (ucontrol->value.integer.value[0] != 0
 129                         && ucontrol->value.integer.value[0] != 1)
 130                 return -EINVAL;
 131
 132         src = snd_soc_read(codec, WM8804_SPDTX4);
 133         switch ((src & 0x40) >> 6) {
 134         case 0:
 135                 if (!ucontrol->value.integer.value[0])
 136                         return 0;
 137                 break;
 138         case 1:
 139                 if (ucontrol->value.integer.value[1])
 140                         return 0;
 141                 break;
 142         }
 143
 144         /* save the current power state of the transmitter */
 145         txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4;
 146         /* power down the transmitter */
 147         snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4);
 148         /* set the tx source */
 149         snd_soc_update_bits(codec, WM8804_SPDTX4, 0x40,
 150                             ucontrol->value.integer.value[0] << 6);
 151
 152         if (ucontrol->value.integer.value[0]) {
 153                 /* power down the receiver */
 154                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0x2);
 155                 /* power up the AIF */
 156                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0);
 157         } else {
 158                 /* don't power down the AIF -- may be used as an output */
 159                 /* power up the receiver */
 160                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0);
 161         }
 162
 163         /* restore the transmitter's configuration */
 164         snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr);
 165
 166         return 0;
 167 }
 168
 169 static bool wm8804_volatile(struct device *dev, unsigned int reg)
 170 {
 171         switch (reg) {
 172         case WM8804_RST_DEVID1:
 173         case WM8804_DEVID2:
 174         case WM8804_DEVREV:
 175         case WM8804_INTSTAT:
 176         case WM8804_SPDSTAT:
 177         case WM8804_RXCHAN1:
 178         case WM8804_RXCHAN2:
 179         case WM8804_RXCHAN3:
 180         case WM8804_RXCHAN4:
 181         case WM8804_RXCHAN5:
 182                 return true;
 183         default:
 184                 return false;
 185         }
 186 }
 187
 188 static int wm8804_reset(struct snd_soc_codec *codec)
 189 {
 190         return snd_soc_write(codec, WM8804_RST_DEVID1, 0x0);
 191 }
 192
 193 static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 194 {
 195         struct snd_soc_codec *codec;
 196         u16 format, master, bcp, lrp;
 197
 198         codec = dai->codec;
 199
 200         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 201         case SND_SOC_DAIFMT_I2S:
 202                 format = 0x2;
 203                 break;
 204         case SND_SOC_DAIFMT_RIGHT_J:
 205                 format = 0x0;
 206                 break;
 207         case SND_SOC_DAIFMT_LEFT_J:
 208                 format = 0x1;
 209                 break;
 210         case SND_SOC_DAIFMT_DSP_A:
 211         case SND_SOC_DAIFMT_DSP_B:
 212                 format = 0x3;
 213                 break;
 214         default:
 215                 dev_err(dai->dev, "Unknown dai format\n");
 216                 return -EINVAL;
 217         }
 218
 219         /* set data format */
 220         snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format);
 221         snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format);
 222
 223         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 224         case SND_SOC_DAIFMT_CBM_CFM:
 225                 master = 1;
 226                 break;
 227         case SND_SOC_DAIFMT_CBS_CFS:
 228                 master = 0;
 229                 break;
 230         default:
 231                 dev_err(dai->dev, "Unknown master/slave configuration\n");
 232                 return -EINVAL;
 233         }
 234
 235         /* set master/slave mode */
 236         snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6);
 237
 238         bcp = lrp = 0;
 239         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 240         case SND_SOC_DAIFMT_NB_NF:
 241                 break;
 242         case SND_SOC_DAIFMT_IB_IF:
 243                 bcp = lrp = 1;
 244                 break;
 245         case SND_SOC_DAIFMT_IB_NF:
 246                 bcp = 1;
 247                 break;
 248         case SND_SOC_DAIFMT_NB_IF:
 249                 lrp = 1;
 250                 break;
 251         default:
 252                 dev_err(dai->dev, "Unknown polarity configuration\n");
 253                 return -EINVAL;
 254         }
 255
 256         /* set frame inversion */
 257         snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20,
 258                             (bcp << 4) | (lrp << 5));
 259         snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20,
 260                             (bcp << 4) | (lrp << 5));
 261         return 0;
 262 }
 263
 264 static int wm8804_hw_params(struct snd_pcm_substream *substream,
 265                             struct snd_pcm_hw_params *params,
 266                             struct snd_soc_dai *dai)
 267 {
 268         struct snd_soc_codec *codec;
 269         u16 blen;
 270
 271         codec = dai->codec;
 272
 273         switch (params_width(params)) {
 274         case 16:
 275                 blen = 0x0;
 276                 break;
 277         case 20:
 278                 blen = 0x1;
 279                 break;
 280         case 24:
 281                 blen = 0x2;
 282                 break;
 283         default:
 284                 dev_err(dai->dev, "Unsupported word length: %u\n",
 285                         params_width(params));
 286                 return -EINVAL;
 287         }
 288
 289         /* set word length */
 290         snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2);
 291         snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2);
 292
 293         return 0;
 294 }
 295
 296 struct pll_div {
 297         u32 prescale:1;
 298         u32 mclkdiv:1;
 299         u32 freqmode:2;
 300         u32 n:4;
 301         u32 k:22;
 302 };
 303
 304 /* PLL rate to output rate divisions */
 305 static struct {
 306         unsigned int div;
 307         unsigned int freqmode;
 308         unsigned int mclkdiv;
 309 } post_table[] = {
 310         {  2,  0, 0 },
 311         {  4,  0, 1 },
 312         {  4,  1, 0 },
 313         {  8,  1, 1 },
 314         {  8,  2, 0 },
 315         { 16,  2, 1 },
 316         { 12,  3, 0 },
 317         { 24,  3, 1 }
 318 };
 319
 320 #define FIXED_PLL_SIZE ((1ULL << 22) * 10)
 321 static int pll_factors(struct pll_div *pll_div, unsigned int target,
 322                        unsigned int source, unsigned int mclk_div)
 323 {
 324         u64 Kpart;
 325         unsigned long int K, Ndiv, Nmod, tmp;
 326         int i;
 327
 328         /*
 329          * Scale the output frequency up; the PLL should run in the
 330          * region of 90-100MHz.
 331          */
 332         for (i = 0; i < ARRAY_SIZE(post_table); i++) {
 333                 tmp = target * post_table[i].div;
 334                 if ((tmp >= 90000000 && tmp <= 100000000) &&
 335                     (mclk_div == post_table[i].mclkdiv)) {
 336                         pll_div->freqmode = post_table[i].freqmode;
 337                         pll_div->mclkdiv = post_table[i].mclkdiv;
 338                         target *= post_table[i].div;
 339                         break;
 340                 }
 341         }
 342
 343         if (i == ARRAY_SIZE(post_table)) {
 344                 pr_err("%s: Unable to scale output frequency: %uHz\n",
 345                        __func__, target);
 346                 return -EINVAL;
 347         }
 348
 349         pll_div->prescale = 0;
 350         Ndiv = target / source;
 351         if (Ndiv < 5) {
 352                 source >>= 1;
 353                 pll_div->prescale = 1;
 354                 Ndiv = target / source;
 355         }
 356
 357         if (Ndiv < 5 || Ndiv > 13) {
 358                 pr_err("%s: WM8804 N value is not within the recommended range: %lu\n",
 359                        __func__, Ndiv);
 360                 return -EINVAL;
 361         }
 362         pll_div->n = Ndiv;
 363
 364         Nmod = target % source;
 365         Kpart = FIXED_PLL_SIZE * (u64)Nmod;
 366
 367         do_div(Kpart, source);
 368
 369         K = Kpart & 0xffffffff;
 370         if ((K % 10) >= 5)
 371                 K += 5;
 372         K /= 10;
 373         pll_div->k = K;
 374
 375         return 0;
 376 }
 377
 378 static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
 379                           int source, unsigned int freq_in,
 380                           unsigned int freq_out)
 381 {
 382         struct snd_soc_codec *codec;
 383
 384         codec = dai->codec;
 385         if (!freq_in || !freq_out) {
 386                 /* disable the PLL */
 387                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
 388                 return 0;
 389         } else {
 390                 int ret;
 391                 struct pll_div pll_div;
 392                 struct wm8804_priv *wm8804;
 393
 394                 wm8804 = snd_soc_codec_get_drvdata(codec);
 395
 396                 ret = pll_factors(&pll_div, freq_out, freq_in,
 397                                   wm8804->mclk_div);
 398                 if (ret)
 399                         return ret;
 400
 401                 /* power down the PLL before reprogramming it */
 402                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
 403
 404                 /* set PLLN and PRESCALE */
 405                 snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
 406                                     pll_div.n | (pll_div.prescale << 4));
 407                 /* set mclkdiv and freqmode */
 408                 snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
 409                                     pll_div.freqmode | (pll_div.mclkdiv << 3));
 410                 /* set PLLK */
 411                 snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
 412                 snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
 413                 snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
 414
 415                 /* power up the PLL */
 416                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int wm8804_set_sysclk(struct snd_soc_dai *dai,
 423                              int clk_id, unsigned int freq, int dir)
 424 {
 425         struct snd_soc_codec *codec;
 426
 427         codec = dai->codec;
 428
 429         switch (clk_id) {
 430         case WM8804_TX_CLKSRC_MCLK:
 431                 if ((freq >= 10000000 && freq <= 14400000)
 432                                 || (freq >= 16280000 && freq <= 27000000))
 433                         snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80);
 434                 else {
 435                         dev_err(dai->dev, "OSCCLOCK is not within the "
 436                                 "recommended range: %uHz\n", freq);
 437                         return -EINVAL;
 438                 }
 439                 break;
 440         case WM8804_TX_CLKSRC_PLL:
 441                 snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0);
 442                 break;
 443         case WM8804_CLKOUT_SRC_CLK1:
 444                 snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0);
 445                 break;
 446         case WM8804_CLKOUT_SRC_OSCCLK:
 447                 snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8);
 448                 break;
 449         default:
 450                 dev_err(dai->dev, "Unknown clock source: %d\n", clk_id);
 451                 return -EINVAL;
 452         }
 453
 454         return 0;
 455 }
 456
 457 static int wm8804_set_clkdiv(struct snd_soc_dai *dai,
 458                              int div_id, int div)
 459 {
 460         struct snd_soc_codec *codec;
 461         struct wm8804_priv *wm8804;
 462
 463         codec = dai->codec;
 464         switch (div_id) {
 465         case WM8804_CLKOUT_DIV:
 466                 snd_soc_update_bits(codec, WM8804_PLL5, 0x30,
 467                                     (div & 0x3) << 4);
 468                 break;
 469         case WM8804_MCLK_DIV:
 470                 wm8804 = snd_soc_codec_get_drvdata(codec);
 471                 wm8804->mclk_div = div;
 472                 break;
 473         default:
 474                 dev_err(dai->dev, "Unknown clock divider: %d\n", div_id);
 475                 return -EINVAL;
 476         }
 477         return 0;
 478 }
 479
 480 static int wm8804_set_bias_level(struct snd_soc_codec *codec,
 481                                  enum snd_soc_bias_level level)
 482 {
 483         int ret;
 484         struct wm8804_priv *wm8804;
 485
 486         wm8804 = snd_soc_codec_get_drvdata(codec);
 487         switch (level) {
 488         case SND_SOC_BIAS_ON:
 489                 break;
 490         case SND_SOC_BIAS_PREPARE:
 491                 /* power up the OSC and the PLL */
 492                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 493                 break;
 494         case SND_SOC_BIAS_STANDBY:
 495                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 496                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
 497                                                     wm8804->supplies);
 498                         if (ret) {
 499                                 dev_err(codec->dev,
 500                                         "Failed to enable supplies: %d\n",
 501                                         ret);
 502                                 return ret;
 503                         }
 504                         regcache_sync(wm8804->regmap);
 505                 }
 506                 /* power down the OSC and the PLL */
 507                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
 508                 break;
 509         case SND_SOC_BIAS_OFF:
 510                 /* power down the OSC and the PLL */
 511                 snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
 512                 regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies),
 513                                        wm8804->supplies);
 514                 break;
 515         }
 516
 517         codec->dapm.bias_level = level;
 518         return 0;
 519 }
 520
 521 static int wm8804_remove(struct snd_soc_codec *codec)
 522 {
 523         struct wm8804_priv *wm8804;
 524         int i;
 525
 526         wm8804 = snd_soc_codec_get_drvdata(codec);
 527
 528         for (i = 0; i < ARRAY_SIZE(wm8804->supplies); ++i)
 529                 regulator_unregister_notifier(wm8804->supplies[i].consumer,
 530                                               &wm8804->disable_nb[i]);
 531         return 0;
 532 }
 533
 534 static int wm8804_probe(struct snd_soc_codec *codec)
 535 {
 536         struct wm8804_priv *wm8804;
 537         int i, id1, id2, ret;
 538
 539         wm8804 = snd_soc_codec_get_drvdata(codec);
 540
 541         for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++)
 542                 wm8804->supplies[i].supply = wm8804_supply_names[i];
 543
 544         ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8804->supplies),
 545                                  wm8804->supplies);
 546         if (ret) {
 547                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 548                 return ret;
 549         }
 550
 551         wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0;
 552         wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1;
 553
 554         /* This should really be moved into the regulator core */
 555         for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) {
 556                 ret = regulator_register_notifier(wm8804->supplies[i].consumer,
 557                                                   &wm8804->disable_nb[i]);
 558                 if (ret != 0) {
 559                         dev_err(codec->dev,
 560                                 "Failed to register regulator notifier: %d\n",
 561                                 ret);
 562                 }
 563         }
 564
 565         ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
 566                                     wm8804->supplies);
 567         if (ret) {
 568                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 569                 return ret;
 570         }
 571
 572         id1 = snd_soc_read(codec, WM8804_RST_DEVID1);
 573         if (id1 < 0) {
 574                 dev_err(codec->dev, "Failed to read device ID: %d\n", id1);
 575                 ret = id1;
 576                 goto err_reg_enable;
 577         }
 578
 579         id2 = snd_soc_read(codec, WM8804_DEVID2);
 580         if (id2 < 0) {
 581                 dev_err(codec->dev, "Failed to read device ID: %d\n", id2);
 582                 ret = id2;
 583                 goto err_reg_enable;
 584         }
 585
 586         id2 = (id2 << 8) | id1;
 587
 588         if (id2 != 0x8805) {
 589                 dev_err(codec->dev, "Invalid device ID: %#x\n", id2);
 590                 ret = -EINVAL;
 591                 goto err_reg_enable;
 592         }
 593
 594         ret = snd_soc_read(codec, WM8804_DEVREV);
 595         if (ret < 0) {
 596                 dev_err(codec->dev, "Failed to read device revision: %d\n",
 597                         ret);
 598                 goto err_reg_enable;
 599         }
 600         dev_info(codec->dev, "revision %c\n", ret + 'A');
 601
 602         ret = wm8804_reset(codec);
 603         if (ret < 0) {
 604                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 605                 goto err_reg_enable;
 606         }
 607
 608         return 0;
 609
 610 err_reg_enable:
 611         regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
 612         return ret;
 613 }
 614
 615 static const struct snd_soc_dai_ops wm8804_dai_ops = {
 616         .hw_params = wm8804_hw_params,
 617         .set_fmt = wm8804_set_fmt,
 618         .set_sysclk = wm8804_set_sysclk,
 619         .set_clkdiv = wm8804_set_clkdiv,
 620         .set_pll = wm8804_set_pll
 621 };
 622
 623 #define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 624                         SNDRV_PCM_FMTBIT_S24_LE)
 625
 626 #define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 627                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
 628                       SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
 629                       SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
 630
 631 static struct snd_soc_dai_driver wm8804_dai = {
 632         .name = "wm8804-spdif",
 633         .playback = {
 634                 .stream_name = "Playback",
 635                 .channels_min = 2,
 636                 .channels_max = 2,
 637                 .rates = WM8804_RATES,
 638                 .formats = WM8804_FORMATS,
 639         },
 640         .capture = {
 641                 .stream_name = "Capture",
 642                 .channels_min = 2,
 643                 .channels_max = 2,
 644                 .rates = WM8804_RATES,
 645                 .formats = WM8804_FORMATS,
 646         },
 647         .ops = &wm8804_dai_ops,
 648         .symmetric_rates = 1
 649 };
 650
 651 static struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
 652         .probe = wm8804_probe,
 653         .remove = wm8804_remove,
 654         .set_bias_level = wm8804_set_bias_level,
 655         .idle_bias_off = true,
 656
 657         .controls = wm8804_snd_controls,
 658         .num_controls = ARRAY_SIZE(wm8804_snd_controls),
 659 };
 660
 661 static const struct of_device_id wm8804_of_match[] = {
 662         { .compatible = "wlf,wm8804", },
 663         { }
 664 };
 665 MODULE_DEVICE_TABLE(of, wm8804_of_match);
 666
 667 static struct regmap_config wm8804_regmap_config = {
 668         .reg_bits = 8,
 669         .val_bits = 8,
 670
 671         .max_register = WM8804_MAX_REGISTER,
 672         .volatile_reg = wm8804_volatile,
 673
 674         .cache_type = REGCACHE_RBTREE,
 675         .reg_defaults = wm8804_reg_defaults,
 676         .num_reg_defaults = ARRAY_SIZE(wm8804_reg_defaults),
 677 };
 678
 679 #if defined(CONFIG_SPI_MASTER)
 680 static int wm8804_spi_probe(struct spi_device *spi)
 681 {
 682         struct wm8804_priv *wm8804;
 683         int ret;
 684
 685         wm8804 = devm_kzalloc(&spi->dev, sizeof *wm8804, GFP_KERNEL);
 686         if (!wm8804)
 687                 return -ENOMEM;
 688
 689         wm8804->regmap = devm_regmap_init_spi(spi, &wm8804_regmap_config);
 690         if (IS_ERR(wm8804->regmap)) {
 691                 ret = PTR_ERR(wm8804->regmap);
 692                 return ret;
 693         }
 694
 695         spi_set_drvdata(spi, wm8804);
 696
 697         ret = snd_soc_register_codec(&spi->dev,
 698                                      &soc_codec_dev_wm8804, &wm8804_dai, 1);
 699
 700         return ret;
 701 }
 702
 703 static int wm8804_spi_remove(struct spi_device *spi)
 704 {
 705         snd_soc_unregister_codec(&spi->dev);
 706         return 0;
 707 }
 708
 709 static struct spi_driver wm8804_spi_driver = {
 710         .driver = {
 711                 .name = "wm8804",
 712                 .owner = THIS_MODULE,
 713                 .of_match_table = wm8804_of_match,
 714         },
 715         .probe = wm8804_spi_probe,
 716         .remove = wm8804_spi_remove
 717 };
 718 #endif
 719
 720 #if IS_ENABLED(CONFIG_I2C)
 721 static int wm8804_i2c_probe(struct i2c_client *i2c,
 722                             const struct i2c_device_id *id)
 723 {
 724         struct wm8804_priv *wm8804;
 725         int ret;
 726
 727         wm8804 = devm_kzalloc(&i2c->dev, sizeof *wm8804, GFP_KERNEL);
 728         if (!wm8804)
 729                 return -ENOMEM;
 730
 731         wm8804->regmap = devm_regmap_init_i2c(i2c, &wm8804_regmap_config);
 732         if (IS_ERR(wm8804->regmap)) {
 733                 ret = PTR_ERR(wm8804->regmap);
 734                 return ret;
 735         }
 736
 737         i2c_set_clientdata(i2c, wm8804);
 738
 739         ret = snd_soc_register_codec(&i2c->dev,
 740                                      &soc_codec_dev_wm8804, &wm8804_dai, 1);
 741         return ret;
 742 }
 743
 744 static int wm8804_i2c_remove(struct i2c_client *i2c)
 745 {
 746         snd_soc_unregister_codec(&i2c->dev);
 747         return 0;
 748 }
 749
 750 static const struct i2c_device_id wm8804_i2c_id[] = {
 751         { "wm8804", 0 },
 752         { }
 753 };
 754 MODULE_DEVICE_TABLE(i2c, wm8804_i2c_id);
 755
 756 static struct i2c_driver wm8804_i2c_driver = {
 757         .driver = {
 758                 .name = "wm8804",
 759                 .owner = THIS_MODULE,
 760                 .of_match_table = wm8804_of_match,
 761         },
 762         .probe = wm8804_i2c_probe,
 763         .remove = wm8804_i2c_remove,
 764         .id_table = wm8804_i2c_id
 765 };
 766 #endif
 767
 768 static int __init wm8804_modinit(void)
 769 {
 770         int ret = 0;
 771
 772 #if IS_ENABLED(CONFIG_I2C)
 773         ret = i2c_add_driver(&wm8804_i2c_driver);
 774         if (ret) {
 775                 printk(KERN_ERR "Failed to register wm8804 I2C driver: %d\n",
 776                        ret);
 777         }
 778 #endif
 779 #if defined(CONFIG_SPI_MASTER)
 780         ret = spi_register_driver(&wm8804_spi_driver);
 781         if (ret != 0) {
 782                 printk(KERN_ERR "Failed to register wm8804 SPI driver: %d\n",
 783                        ret);
 784         }
 785 #endif
 786         return ret;
 787 }
 788 module_init(wm8804_modinit);
 789
 790 static void __exit wm8804_exit(void)
 791 {
 792 #if IS_ENABLED(CONFIG_I2C)
 793         i2c_del_driver(&wm8804_i2c_driver);
 794 #endif
 795 #if defined(CONFIG_SPI_MASTER)
 796         spi_unregister_driver(&wm8804_spi_driver);
 797 #endif
 798 }
 799 module_exit(wm8804_exit);
 800
 801 MODULE_DESCRIPTION("ASoC WM8804 driver");
 802 MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
 803 MODULE_LICENSE("GPL");