sound/soc/codecs/wm8510.c

   1 /*
   2  * wm8510.c  --  WM8510 ALSA Soc Audio driver
   3  *
   4  * Copyright 2006 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
   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/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/spi/spi.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/soc-dapm.h>
  27 #include <sound/initval.h>
  28
  29 #include "wm8510.h"
  30
  31 #define WM8510_VERSION "0.6"
  32
  33 struct snd_soc_codec_device soc_codec_dev_wm8510;
  34
  35 /*
  36  * wm8510 register cache
  37  * We can't read the WM8510 register space when we are
  38  * using 2 wire for device control, so we cache them instead.
  39  */
  40 static const u16 wm8510_reg[WM8510_CACHEREGNUM] = {
  41         0x0000, 0x0000, 0x0000, 0x0000,
  42         0x0050, 0x0000, 0x0140, 0x0000,
  43         0x0000, 0x0000, 0x0000, 0x00ff,
  44         0x0000, 0x0000, 0x0100, 0x00ff,
  45         0x0000, 0x0000, 0x012c, 0x002c,
  46         0x002c, 0x002c, 0x002c, 0x0000,
  47         0x0032, 0x0000, 0x0000, 0x0000,
  48         0x0000, 0x0000, 0x0000, 0x0000,
  49         0x0038, 0x000b, 0x0032, 0x0000,
  50         0x0008, 0x000c, 0x0093, 0x00e9,
  51         0x0000, 0x0000, 0x0000, 0x0000,
  52         0x0003, 0x0010, 0x0000, 0x0000,
  53         0x0000, 0x0002, 0x0001, 0x0000,
  54         0x0000, 0x0000, 0x0039, 0x0000,
  55         0x0001,
  56 };
  57
  58 #define WM8510_POWER1_BIASEN  0x08
  59 #define WM8510_POWER1_BUFIOEN 0x10
  60
  61 /*
  62  * read wm8510 register cache
  63  */
  64 static inline unsigned int wm8510_read_reg_cache(struct snd_soc_codec *codec,
  65         unsigned int reg)
  66 {
  67         u16 *cache = codec->reg_cache;
  68         if (reg == WM8510_RESET)
  69                 return 0;
  70         if (reg >= WM8510_CACHEREGNUM)
  71                 return -1;
  72         return cache[reg];
  73 }
  74
  75 /*
  76  * write wm8510 register cache
  77  */
  78 static inline void wm8510_write_reg_cache(struct snd_soc_codec *codec,
  79         u16 reg, unsigned int value)
  80 {
  81         u16 *cache = codec->reg_cache;
  82         if (reg >= WM8510_CACHEREGNUM)
  83                 return;
  84         cache[reg] = value;
  85 }
  86
  87 /*
  88  * write to the WM8510 register space
  89  */
  90 static int wm8510_write(struct snd_soc_codec *codec, unsigned int reg,
  91         unsigned int value)
  92 {
  93         u8 data[2];
  94
  95         /* data is
  96          *   D15..D9 WM8510 register offset
  97          *   D8...D0 register data
  98          */
  99         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
 100         data[1] = value & 0x00ff;
 101
 102         wm8510_write_reg_cache(codec, reg, value);
 103         if (codec->hw_write(codec->control_data, data, 2) == 2)
 104                 return 0;
 105         else
 106                 return -EIO;
 107 }
 108
 109 #define wm8510_reset(c) wm8510_write(c, WM8510_RESET, 0)
 110
 111 static const char *wm8510_companding[] = { "Off", "NC", "u-law", "A-law" };
 112 static const char *wm8510_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
 113 static const char *wm8510_alc[] = { "ALC", "Limiter" };
 114
 115 static const struct soc_enum wm8510_enum[] = {
 116         SOC_ENUM_SINGLE(WM8510_COMP, 1, 4, wm8510_companding), /* adc */
 117         SOC_ENUM_SINGLE(WM8510_COMP, 3, 4, wm8510_companding), /* dac */
 118         SOC_ENUM_SINGLE(WM8510_DAC,  4, 4, wm8510_deemp),
 119         SOC_ENUM_SINGLE(WM8510_ALC3,  8, 2, wm8510_alc),
 120 };
 121
 122 static const struct snd_kcontrol_new wm8510_snd_controls[] = {
 123
 124 SOC_SINGLE("Digital Loopback Switch", WM8510_COMP, 0, 1, 0),
 125
 126 SOC_ENUM("DAC Companding", wm8510_enum[1]),
 127 SOC_ENUM("ADC Companding", wm8510_enum[0]),
 128
 129 SOC_ENUM("Playback De-emphasis", wm8510_enum[2]),
 130 SOC_SINGLE("DAC Inversion Switch", WM8510_DAC, 0, 1, 0),
 131
 132 SOC_SINGLE("Master Playback Volume", WM8510_DACVOL, 0, 127, 0),
 133
 134 SOC_SINGLE("High Pass Filter Switch", WM8510_ADC, 8, 1, 0),
 135 SOC_SINGLE("High Pass Cut Off", WM8510_ADC, 4, 7, 0),
 136 SOC_SINGLE("ADC Inversion Switch", WM8510_COMP, 0, 1, 0),
 137
 138 SOC_SINGLE("Capture Volume", WM8510_ADCVOL,  0, 127, 0),
 139
 140 SOC_SINGLE("DAC Playback Limiter Switch", WM8510_DACLIM1,  8, 1, 0),
 141 SOC_SINGLE("DAC Playback Limiter Decay", WM8510_DACLIM1,  4, 15, 0),
 142 SOC_SINGLE("DAC Playback Limiter Attack", WM8510_DACLIM1,  0, 15, 0),
 143
 144 SOC_SINGLE("DAC Playback Limiter Threshold", WM8510_DACLIM2,  4, 7, 0),
 145 SOC_SINGLE("DAC Playback Limiter Boost", WM8510_DACLIM2,  0, 15, 0),
 146
 147 SOC_SINGLE("ALC Enable Switch", WM8510_ALC1,  8, 1, 0),
 148 SOC_SINGLE("ALC Capture Max Gain", WM8510_ALC1,  3, 7, 0),
 149 SOC_SINGLE("ALC Capture Min Gain", WM8510_ALC1,  0, 7, 0),
 150
 151 SOC_SINGLE("ALC Capture ZC Switch", WM8510_ALC2,  8, 1, 0),
 152 SOC_SINGLE("ALC Capture Hold", WM8510_ALC2,  4, 7, 0),
 153 SOC_SINGLE("ALC Capture Target", WM8510_ALC2,  0, 15, 0),
 154
 155 SOC_ENUM("ALC Capture Mode", wm8510_enum[3]),
 156 SOC_SINGLE("ALC Capture Decay", WM8510_ALC3,  4, 15, 0),
 157 SOC_SINGLE("ALC Capture Attack", WM8510_ALC3,  0, 15, 0),
 158
 159 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8510_NGATE,  3, 1, 0),
 160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8510_NGATE,  0, 7, 0),
 161
 162 SOC_SINGLE("Capture PGA ZC Switch", WM8510_INPPGA,  7, 1, 0),
 163 SOC_SINGLE("Capture PGA Volume", WM8510_INPPGA,  0, 63, 0),
 164
 165 SOC_SINGLE("Speaker Playback ZC Switch", WM8510_SPKVOL,  7, 1, 0),
 166 SOC_SINGLE("Speaker Playback Switch", WM8510_SPKVOL,  6, 1, 1),
 167 SOC_SINGLE("Speaker Playback Volume", WM8510_SPKVOL,  0, 63, 0),
 168 SOC_SINGLE("Speaker Boost", WM8510_OUTPUT, 2, 1, 0),
 169
 170 SOC_SINGLE("Capture Boost(+20dB)", WM8510_ADCBOOST,  8, 1, 0),
 171 SOC_SINGLE("Mono Playback Switch", WM8510_MONOMIX, 6, 1, 1),
 172 };
 173
 174 /* Speaker Output Mixer */
 175 static const struct snd_kcontrol_new wm8510_speaker_mixer_controls[] = {
 176 SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_SPKMIX, 1, 1, 0),
 177 SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_SPKMIX, 5, 1, 0),
 178 SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_SPKMIX, 0, 1, 0),
 179 };
 180
 181 /* Mono Output Mixer */
 182 static const struct snd_kcontrol_new wm8510_mono_mixer_controls[] = {
 183 SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_MONOMIX, 1, 1, 0),
 184 SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_MONOMIX, 2, 1, 0),
 185 SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_MONOMIX, 0, 1, 0),
 186 };
 187
 188 static const struct snd_kcontrol_new wm8510_boost_controls[] = {
 189 SOC_DAPM_SINGLE("Mic PGA Switch", WM8510_INPPGA,  6, 1, 1),
 190 SOC_DAPM_SINGLE("Aux Volume", WM8510_ADCBOOST, 0, 7, 0),
 191 SOC_DAPM_SINGLE("Mic Volume", WM8510_ADCBOOST, 4, 7, 0),
 192 };
 193
 194 static const struct snd_kcontrol_new wm8510_micpga_controls[] = {
 195 SOC_DAPM_SINGLE("MICP Switch", WM8510_INPUT, 0, 1, 0),
 196 SOC_DAPM_SINGLE("MICN Switch", WM8510_INPUT, 1, 1, 0),
 197 SOC_DAPM_SINGLE("AUX Switch", WM8510_INPUT, 2, 1, 0),
 198 };
 199
 200 static const struct snd_soc_dapm_widget wm8510_dapm_widgets[] = {
 201 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8510_POWER3, 2, 0,
 202         &wm8510_speaker_mixer_controls[0],
 203         ARRAY_SIZE(wm8510_speaker_mixer_controls)),
 204 SND_SOC_DAPM_MIXER("Mono Mixer", WM8510_POWER3, 3, 0,
 205         &wm8510_mono_mixer_controls[0],
 206         ARRAY_SIZE(wm8510_mono_mixer_controls)),
 207 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8510_POWER3, 0, 0),
 208 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8510_POWER2, 0, 0),
 209 SND_SOC_DAPM_PGA("Aux Input", WM8510_POWER1, 6, 0, NULL, 0),
 210 SND_SOC_DAPM_PGA("SpkN Out", WM8510_POWER3, 5, 0, NULL, 0),
 211 SND_SOC_DAPM_PGA("SpkP Out", WM8510_POWER3, 6, 0, NULL, 0),
 212 SND_SOC_DAPM_PGA("Mono Out", WM8510_POWER3, 7, 0, NULL, 0),
 213
 214 SND_SOC_DAPM_MIXER("Mic PGA", WM8510_POWER2, 2, 0,
 215                    &wm8510_micpga_controls[0],
 216                    ARRAY_SIZE(wm8510_micpga_controls)),
 217 SND_SOC_DAPM_MIXER("Boost Mixer", WM8510_POWER2, 4, 0,
 218         &wm8510_boost_controls[0],
 219         ARRAY_SIZE(wm8510_boost_controls)),
 220
 221 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8510_POWER1, 4, 0),
 222
 223 SND_SOC_DAPM_INPUT("MICN"),
 224 SND_SOC_DAPM_INPUT("MICP"),
 225 SND_SOC_DAPM_INPUT("AUX"),
 226 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 227 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 228 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 229 };
 230
 231 static const struct snd_soc_dapm_route audio_map[] = {
 232         /* Mono output mixer */
 233         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 234         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 235         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 236
 237         /* Speaker output mixer */
 238         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 239         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 240         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 241
 242         /* Outputs */
 243         {"Mono Out", NULL, "Mono Mixer"},
 244         {"MONOOUT", NULL, "Mono Out"},
 245         {"SpkN Out", NULL, "Speaker Mixer"},
 246         {"SpkP Out", NULL, "Speaker Mixer"},
 247         {"SPKOUTN", NULL, "SpkN Out"},
 248         {"SPKOUTP", NULL, "SpkP Out"},
 249
 250         /* Microphone PGA */
 251         {"Mic PGA", "MICN Switch", "MICN"},
 252         {"Mic PGA", "MICP Switch", "MICP"},
 253         { "Mic PGA", "AUX Switch", "Aux Input" },
 254
 255         /* Boost Mixer */
 256         {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
 257         {"Boost Mixer", "Mic Volume", "MICP"},
 258         {"Boost Mixer", "Aux Volume", "Aux Input"},
 259
 260         {"ADC", NULL, "Boost Mixer"},
 261 };
 262
 263 static int wm8510_add_widgets(struct snd_soc_codec *codec)
 264 {
 265         snd_soc_dapm_new_controls(codec, wm8510_dapm_widgets,
 266                                   ARRAY_SIZE(wm8510_dapm_widgets));
 267
 268         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 269
 270         snd_soc_dapm_new_widgets(codec);
 271         return 0;
 272 }
 273
 274 struct pll_ {
 275         unsigned int pre_div:4; /* prescale - 1 */
 276         unsigned int n:4;
 277         unsigned int k;
 278 };
 279
 280 static struct pll_ pll_div;
 281
 282 /* The size in bits of the pll divide multiplied by 10
 283  * to allow rounding later */
 284 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 285
 286 static void pll_factors(unsigned int target, unsigned int source)
 287 {
 288         unsigned long long Kpart;
 289         unsigned int K, Ndiv, Nmod;
 290
 291         Ndiv = target / source;
 292         if (Ndiv < 6) {
 293                 source >>= 1;
 294                 pll_div.pre_div = 1;
 295                 Ndiv = target / source;
 296         } else
 297                 pll_div.pre_div = 0;
 298
 299         if ((Ndiv < 6) || (Ndiv > 12))
 300                 printk(KERN_WARNING
 301                         "WM8510 N value %d outwith recommended range!d\n",
 302                         Ndiv);
 303
 304         pll_div.n = Ndiv;
 305         Nmod = target % source;
 306         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 307
 308         do_div(Kpart, source);
 309
 310         K = Kpart & 0xFFFFFFFF;
 311
 312         /* Check if we need to round */
 313         if ((K % 10) >= 5)
 314                 K += 5;
 315
 316         /* Move down to proper range now rounding is done */
 317         K /= 10;
 318
 319         pll_div.k = K;
 320 }
 321
 322 static int wm8510_set_dai_pll(struct snd_soc_dai *codec_dai,
 323                 int pll_id, unsigned int freq_in, unsigned int freq_out)
 324 {
 325         struct snd_soc_codec *codec = codec_dai->codec;
 326         u16 reg;
 327
 328         if (freq_in == 0 || freq_out == 0) {
 329                 /* Clock CODEC directly from MCLK */
 330                 reg = wm8510_read_reg_cache(codec, WM8510_CLOCK);
 331                 wm8510_write(codec, WM8510_CLOCK, reg & 0x0ff);
 332
 333                 /* Turn off PLL */
 334                 reg = wm8510_read_reg_cache(codec, WM8510_POWER1);
 335                 wm8510_write(codec, WM8510_POWER1, reg & 0x1df);
 336                 return 0;
 337         }
 338
 339         pll_factors(freq_out*4, freq_in);
 340
 341         wm8510_write(codec, WM8510_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 342         wm8510_write(codec, WM8510_PLLK1, pll_div.k >> 18);
 343         wm8510_write(codec, WM8510_PLLK2, (pll_div.k >> 9) & 0x1ff);
 344         wm8510_write(codec, WM8510_PLLK3, pll_div.k & 0x1ff);
 345         reg = wm8510_read_reg_cache(codec, WM8510_POWER1);
 346         wm8510_write(codec, WM8510_POWER1, reg | 0x020);
 347
 348         /* Run CODEC from PLL instead of MCLK */
 349         reg = wm8510_read_reg_cache(codec, WM8510_CLOCK);
 350         wm8510_write(codec, WM8510_CLOCK, reg | 0x100);
 351
 352         return 0;
 353 }
 354
 355 /*
 356  * Configure WM8510 clock dividers.
 357  */
 358 static int wm8510_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 359                 int div_id, int div)
 360 {
 361         struct snd_soc_codec *codec = codec_dai->codec;
 362         u16 reg;
 363
 364         switch (div_id) {
 365         case WM8510_OPCLKDIV:
 366                 reg = wm8510_read_reg_cache(codec, WM8510_GPIO) & 0x1cf;
 367                 wm8510_write(codec, WM8510_GPIO, reg | div);
 368                 break;
 369         case WM8510_MCLKDIV:
 370                 reg = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x11f;
 371                 wm8510_write(codec, WM8510_CLOCK, reg | div);
 372                 break;
 373         case WM8510_ADCCLK:
 374                 reg = wm8510_read_reg_cache(codec, WM8510_ADC) & 0x1f7;
 375                 wm8510_write(codec, WM8510_ADC, reg | div);
 376                 break;
 377         case WM8510_DACCLK:
 378                 reg = wm8510_read_reg_cache(codec, WM8510_DAC) & 0x1f7;
 379                 wm8510_write(codec, WM8510_DAC, reg | div);
 380                 break;
 381         case WM8510_BCLKDIV:
 382                 reg = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1e3;
 383                 wm8510_write(codec, WM8510_CLOCK, reg | div);
 384                 break;
 385         default:
 386                 return -EINVAL;
 387         }
 388
 389         return 0;
 390 }
 391
 392 static int wm8510_set_dai_fmt(struct snd_soc_dai *codec_dai,
 393                 unsigned int fmt)
 394 {
 395         struct snd_soc_codec *codec = codec_dai->codec;
 396         u16 iface = 0;
 397         u16 clk = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1fe;
 398
 399         /* set master/slave audio interface */
 400         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 401         case SND_SOC_DAIFMT_CBM_CFM:
 402                 clk |= 0x0001;
 403                 break;
 404         case SND_SOC_DAIFMT_CBS_CFS:
 405                 break;
 406         default:
 407                 return -EINVAL;
 408         }
 409
 410         /* interface format */
 411         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 412         case SND_SOC_DAIFMT_I2S:
 413                 iface |= 0x0010;
 414                 break;
 415         case SND_SOC_DAIFMT_RIGHT_J:
 416                 break;
 417         case SND_SOC_DAIFMT_LEFT_J:
 418                 iface |= 0x0008;
 419                 break;
 420         case SND_SOC_DAIFMT_DSP_A:
 421                 iface |= 0x00018;
 422                 break;
 423         default:
 424                 return -EINVAL;
 425         }
 426
 427         /* clock inversion */
 428         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 429         case SND_SOC_DAIFMT_NB_NF:
 430                 break;
 431         case SND_SOC_DAIFMT_IB_IF:
 432                 iface |= 0x0180;
 433                 break;
 434         case SND_SOC_DAIFMT_IB_NF:
 435                 iface |= 0x0100;
 436                 break;
 437         case SND_SOC_DAIFMT_NB_IF:
 438                 iface |= 0x0080;
 439                 break;
 440         default:
 441                 return -EINVAL;
 442         }
 443
 444         wm8510_write(codec, WM8510_IFACE, iface);
 445         wm8510_write(codec, WM8510_CLOCK, clk);
 446         return 0;
 447 }
 448
 449 static int wm8510_pcm_hw_params(struct snd_pcm_substream *substream,
 450                                 struct snd_pcm_hw_params *params,
 451                                 struct snd_soc_dai *dai)
 452 {
 453         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 454         struct snd_soc_device *socdev = rtd->socdev;
 455         struct snd_soc_codec *codec = socdev->card->codec;
 456         u16 iface = wm8510_read_reg_cache(codec, WM8510_IFACE) & 0x19f;
 457         u16 adn = wm8510_read_reg_cache(codec, WM8510_ADD) & 0x1f1;
 458
 459         /* bit size */
 460         switch (params_format(params)) {
 461         case SNDRV_PCM_FORMAT_S16_LE:
 462                 break;
 463         case SNDRV_PCM_FORMAT_S20_3LE:
 464                 iface |= 0x0020;
 465                 break;
 466         case SNDRV_PCM_FORMAT_S24_LE:
 467                 iface |= 0x0040;
 468                 break;
 469         case SNDRV_PCM_FORMAT_S32_LE:
 470                 iface |= 0x0060;
 471                 break;
 472         }
 473
 474         /* filter coefficient */
 475         switch (params_rate(params)) {
 476         case SNDRV_PCM_RATE_8000:
 477                 adn |= 0x5 << 1;
 478                 break;
 479         case SNDRV_PCM_RATE_11025:
 480                 adn |= 0x4 << 1;
 481                 break;
 482         case SNDRV_PCM_RATE_16000:
 483                 adn |= 0x3 << 1;
 484                 break;
 485         case SNDRV_PCM_RATE_22050:
 486                 adn |= 0x2 << 1;
 487                 break;
 488         case SNDRV_PCM_RATE_32000:
 489                 adn |= 0x1 << 1;
 490                 break;
 491         case SNDRV_PCM_RATE_44100:
 492         case SNDRV_PCM_RATE_48000:
 493                 break;
 494         }
 495
 496         wm8510_write(codec, WM8510_IFACE, iface);
 497         wm8510_write(codec, WM8510_ADD, adn);
 498         return 0;
 499 }
 500
 501 static int wm8510_mute(struct snd_soc_dai *dai, int mute)
 502 {
 503         struct snd_soc_codec *codec = dai->codec;
 504         u16 mute_reg = wm8510_read_reg_cache(codec, WM8510_DAC) & 0xffbf;
 505
 506         if (mute)
 507                 wm8510_write(codec, WM8510_DAC, mute_reg | 0x40);
 508         else
 509                 wm8510_write(codec, WM8510_DAC, mute_reg);
 510         return 0;
 511 }
 512
 513 /* liam need to make this lower power with dapm */
 514 static int wm8510_set_bias_level(struct snd_soc_codec *codec,
 515         enum snd_soc_bias_level level)
 516 {
 517         u16 power1 = wm8510_read_reg_cache(codec, WM8510_POWER1) & ~0x3;
 518
 519         switch (level) {
 520         case SND_SOC_BIAS_ON:
 521         case SND_SOC_BIAS_PREPARE:
 522                 power1 |= 0x1;  /* VMID 50k */
 523                 wm8510_write(codec, WM8510_POWER1, power1);
 524                 break;
 525
 526         case SND_SOC_BIAS_STANDBY:
 527                 power1 |= WM8510_POWER1_BIASEN | WM8510_POWER1_BUFIOEN;
 528
 529                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 530                         /* Initial cap charge at VMID 5k */
 531                         wm8510_write(codec, WM8510_POWER1, power1 | 0x3);
 532                         mdelay(100);
 533                 }
 534
 535                 power1 |= 0x2;  /* VMID 500k */
 536                 wm8510_write(codec, WM8510_POWER1, power1);
 537                 break;
 538
 539         case SND_SOC_BIAS_OFF:
 540                 wm8510_write(codec, WM8510_POWER1, 0);
 541                 wm8510_write(codec, WM8510_POWER2, 0);
 542                 wm8510_write(codec, WM8510_POWER3, 0);
 543                 break;
 544         }
 545
 546         codec->bias_level = level;
 547         return 0;
 548 }
 549
 550 #define WM8510_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 551                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 552                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 553
 554 #define WM8510_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 555         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 556
 557 static struct snd_soc_dai_ops wm8510_dai_ops = {
 558         .hw_params      = wm8510_pcm_hw_params,
 559         .digital_mute   = wm8510_mute,
 560         .set_fmt        = wm8510_set_dai_fmt,
 561         .set_clkdiv     = wm8510_set_dai_clkdiv,
 562         .set_pll        = wm8510_set_dai_pll,
 563 };
 564
 565 struct snd_soc_dai wm8510_dai = {
 566         .name = "WM8510 HiFi",
 567         .playback = {
 568                 .stream_name = "Playback",
 569                 .channels_min = 2,
 570                 .channels_max = 2,
 571                 .rates = WM8510_RATES,
 572                 .formats = WM8510_FORMATS,},
 573         .capture = {
 574                 .stream_name = "Capture",
 575                 .channels_min = 2,
 576                 .channels_max = 2,
 577                 .rates = WM8510_RATES,
 578                 .formats = WM8510_FORMATS,},
 579         .ops = &wm8510_dai_ops,
 580 };
 581 EXPORT_SYMBOL_GPL(wm8510_dai);
 582
 583 static int wm8510_suspend(struct platform_device *pdev, pm_message_t state)
 584 {
 585         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 586         struct snd_soc_codec *codec = socdev->card->codec;
 587
 588         wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF);
 589         return 0;
 590 }
 591
 592 static int wm8510_resume(struct platform_device *pdev)
 593 {
 594         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 595         struct snd_soc_codec *codec = socdev->card->codec;
 596         int i;
 597         u8 data[2];
 598         u16 *cache = codec->reg_cache;
 599
 600         /* Sync reg_cache with the hardware */
 601         for (i = 0; i < ARRAY_SIZE(wm8510_reg); i++) {
 602                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 603                 data[1] = cache[i] & 0x00ff;
 604                 codec->hw_write(codec->control_data, data, 2);
 605         }
 606         wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 607         wm8510_set_bias_level(codec, codec->suspend_bias_level);
 608         return 0;
 609 }
 610
 611 /*
 612  * initialise the WM8510 driver
 613  * register the mixer and dsp interfaces with the kernel
 614  */
 615 static int wm8510_init(struct snd_soc_device *socdev)
 616 {
 617         struct snd_soc_codec *codec = socdev->card->codec;
 618         int ret = 0;
 619
 620         codec->name = "WM8510";
 621         codec->owner = THIS_MODULE;
 622         codec->read = wm8510_read_reg_cache;
 623         codec->write = wm8510_write;
 624         codec->set_bias_level = wm8510_set_bias_level;
 625         codec->dai = &wm8510_dai;
 626         codec->num_dai = 1;
 627         codec->reg_cache_size = ARRAY_SIZE(wm8510_reg);
 628         codec->reg_cache = kmemdup(wm8510_reg, sizeof(wm8510_reg), GFP_KERNEL);
 629
 630         if (codec->reg_cache == NULL)
 631                 return -ENOMEM;
 632
 633         wm8510_reset(codec);
 634
 635         /* register pcms */
 636         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 637         if (ret < 0) {
 638                 printk(KERN_ERR "wm8510: failed to create pcms\n");
 639                 goto pcm_err;
 640         }
 641
 642         /* power on device */
 643         codec->bias_level = SND_SOC_BIAS_OFF;
 644         wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 645         snd_soc_add_controls(codec, wm8510_snd_controls,
 646                                 ARRAY_SIZE(wm8510_snd_controls));
 647         wm8510_add_widgets(codec);
 648         ret = snd_soc_init_card(socdev);
 649         if (ret < 0) {
 650                 printk(KERN_ERR "wm8510: failed to register card\n");
 651                 goto card_err;
 652         }
 653         return ret;
 654
 655 card_err:
 656         snd_soc_free_pcms(socdev);
 657         snd_soc_dapm_free(socdev);
 658 pcm_err:
 659         kfree(codec->reg_cache);
 660         return ret;
 661 }
 662
 663 static struct snd_soc_device *wm8510_socdev;
 664
 665 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 666
 667 /*
 668  * WM8510 2 wire address is 0x1a
 669  */
 670
 671 static int wm8510_i2c_probe(struct i2c_client *i2c,
 672                             const struct i2c_device_id *id)
 673 {
 674         struct snd_soc_device *socdev = wm8510_socdev;
 675         struct snd_soc_codec *codec = socdev->card->codec;
 676         int ret;
 677
 678         i2c_set_clientdata(i2c, codec);
 679         codec->control_data = i2c;
 680
 681         ret = wm8510_init(socdev);
 682         if (ret < 0)
 683                 pr_err("failed to initialise WM8510\n");
 684
 685         return ret;
 686 }
 687
 688 static int wm8510_i2c_remove(struct i2c_client *client)
 689 {
 690         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 691         kfree(codec->reg_cache);
 692         return 0;
 693 }
 694
 695 static const struct i2c_device_id wm8510_i2c_id[] = {
 696         { "wm8510", 0 },
 697         { }
 698 };
 699 MODULE_DEVICE_TABLE(i2c, wm8510_i2c_id);
 700
 701 static struct i2c_driver wm8510_i2c_driver = {
 702         .driver = {
 703                 .name = "WM8510 I2C Codec",
 704                 .owner = THIS_MODULE,
 705         },
 706         .probe =    wm8510_i2c_probe,
 707         .remove =   wm8510_i2c_remove,
 708         .id_table = wm8510_i2c_id,
 709 };
 710
 711 static int wm8510_add_i2c_device(struct platform_device *pdev,
 712                                  const struct wm8510_setup_data *setup)
 713 {
 714         struct i2c_board_info info;
 715         struct i2c_adapter *adapter;
 716         struct i2c_client *client;
 717         int ret;
 718
 719         ret = i2c_add_driver(&wm8510_i2c_driver);
 720         if (ret != 0) {
 721                 dev_err(&pdev->dev, "can't add i2c driver\n");
 722                 return ret;
 723         }
 724
 725         memset(&info, 0, sizeof(struct i2c_board_info));
 726         info.addr = setup->i2c_address;
 727         strlcpy(info.type, "wm8510", I2C_NAME_SIZE);
 728
 729         adapter = i2c_get_adapter(setup->i2c_bus);
 730         if (!adapter) {
 731                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 732                         setup->i2c_bus);
 733                 goto err_driver;
 734         }
 735
 736         client = i2c_new_device(adapter, &info);
 737         i2c_put_adapter(adapter);
 738         if (!client) {
 739                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 740                         (unsigned int)info.addr);
 741                 goto err_driver;
 742         }
 743
 744         return 0;
 745
 746 err_driver:
 747         i2c_del_driver(&wm8510_i2c_driver);
 748         return -ENODEV;
 749 }
 750 #endif
 751
 752 #if defined(CONFIG_SPI_MASTER)
 753 static int __devinit wm8510_spi_probe(struct spi_device *spi)
 754 {
 755         struct snd_soc_device *socdev = wm8510_socdev;
 756         struct snd_soc_codec *codec = socdev->card->codec;
 757         int ret;
 758
 759         codec->control_data = spi;
 760
 761         ret = wm8510_init(socdev);
 762         if (ret < 0)
 763                 dev_err(&spi->dev, "failed to initialise WM8510\n");
 764
 765         return ret;
 766 }
 767
 768 static int __devexit wm8510_spi_remove(struct spi_device *spi)
 769 {
 770         return 0;
 771 }
 772
 773 static struct spi_driver wm8510_spi_driver = {
 774         .driver = {
 775                 .name   = "wm8510",
 776                 .bus    = &spi_bus_type,
 777                 .owner  = THIS_MODULE,
 778         },
 779         .probe          = wm8510_spi_probe,
 780         .remove         = __devexit_p(wm8510_spi_remove),
 781 };
 782
 783 static int wm8510_spi_write(struct spi_device *spi, const char *data, int len)
 784 {
 785         struct spi_transfer t;
 786         struct spi_message m;
 787         u8 msg[2];
 788
 789         if (len <= 0)
 790                 return 0;
 791
 792         msg[0] = data[0];
 793         msg[1] = data[1];
 794
 795         spi_message_init(&m);
 796         memset(&t, 0, (sizeof t));
 797
 798         t.tx_buf = &msg[0];
 799         t.len = len;
 800
 801         spi_message_add_tail(&t, &m);
 802         spi_sync(spi, &m);
 803
 804         return len;
 805 }
 806 #endif /* CONFIG_SPI_MASTER */
 807
 808 static int wm8510_probe(struct platform_device *pdev)
 809 {
 810         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 811         struct wm8510_setup_data *setup;
 812         struct snd_soc_codec *codec;
 813         int ret = 0;
 814
 815         pr_info("WM8510 Audio Codec %s", WM8510_VERSION);
 816
 817         setup = socdev->codec_data;
 818         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 819         if (codec == NULL)
 820                 return -ENOMEM;
 821
 822         socdev->card->codec = codec;
 823         mutex_init(&codec->mutex);
 824         INIT_LIST_HEAD(&codec->dapm_widgets);
 825         INIT_LIST_HEAD(&codec->dapm_paths);
 826
 827         wm8510_socdev = socdev;
 828 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 829         if (setup->i2c_address) {
 830                 codec->hw_write = (hw_write_t)i2c_master_send;
 831                 ret = wm8510_add_i2c_device(pdev, setup);
 832         }
 833 #endif
 834 #if defined(CONFIG_SPI_MASTER)
 835         if (setup->spi) {
 836                 codec->hw_write = (hw_write_t)wm8510_spi_write;
 837                 ret = spi_register_driver(&wm8510_spi_driver);
 838                 if (ret != 0)
 839                         printk(KERN_ERR "can't add spi driver");
 840         }
 841 #endif
 842
 843         if (ret != 0)
 844                 kfree(codec);
 845         return ret;
 846 }
 847
 848 /* power down chip */
 849 static int wm8510_remove(struct platform_device *pdev)
 850 {
 851         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 852         struct snd_soc_codec *codec = socdev->card->codec;
 853
 854         if (codec->control_data)
 855                 wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF);
 856
 857         snd_soc_free_pcms(socdev);
 858         snd_soc_dapm_free(socdev);
 859 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 860         i2c_unregister_device(codec->control_data);
 861         i2c_del_driver(&wm8510_i2c_driver);
 862 #endif
 863 #if defined(CONFIG_SPI_MASTER)
 864         spi_unregister_driver(&wm8510_spi_driver);
 865 #endif
 866         kfree(codec);
 867
 868         return 0;
 869 }
 870
 871 struct snd_soc_codec_device soc_codec_dev_wm8510 = {
 872         .probe =        wm8510_probe,
 873         .remove =       wm8510_remove,
 874         .suspend =      wm8510_suspend,
 875         .resume =       wm8510_resume,
 876 };
 877 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8510);
 878
 879 static int __init wm8510_modinit(void)
 880 {
 881         return snd_soc_register_dai(&wm8510_dai);
 882 }
 883 module_init(wm8510_modinit);
 884
 885 static void __exit wm8510_exit(void)
 886 {
 887         snd_soc_unregister_dai(&wm8510_dai);
 888 }
 889 module_exit(wm8510_exit);
 890
 891 MODULE_DESCRIPTION("ASoC WM8510 driver");
 892 MODULE_AUTHOR("Liam Girdwood");
 893 MODULE_LICENSE("GPL");