sound/soc/codecs/wm8974.c

   1 /*
   2  * wm8974.c  --  WM8974 ALSA Soc Audio driver
   3  *
   4  * Copyright 2006 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood <linux@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/version.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.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 "wm8974.h"
  30
  31 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
  32         0x0000, 0x0000, 0x0000, 0x0000,
  33         0x0050, 0x0000, 0x0140, 0x0000,
  34         0x0000, 0x0000, 0x0000, 0x00ff,
  35         0x0000, 0x0000, 0x0100, 0x00ff,
  36         0x0000, 0x0000, 0x012c, 0x002c,
  37         0x002c, 0x002c, 0x002c, 0x0000,
  38         0x0032, 0x0000, 0x0000, 0x0000,
  39         0x0000, 0x0000, 0x0000, 0x0000,
  40         0x0038, 0x000b, 0x0032, 0x0000,
  41         0x0008, 0x000c, 0x0093, 0x00e9,
  42         0x0000, 0x0000, 0x0000, 0x0000,
  43         0x0003, 0x0010, 0x0000, 0x0000,
  44         0x0000, 0x0002, 0x0000, 0x0000,
  45         0x0000, 0x0000, 0x0039, 0x0000,
  46         0x0000,
  47 };
  48
  49 #define WM8974_POWER1_BIASEN  0x08
  50 #define WM8974_POWER1_BUFIOEN 0x10
  51
  52 struct wm8974_priv {
  53         struct snd_soc_codec codec;
  54         u16 reg_cache[WM8974_CACHEREGNUM];
  55 };
  56
  57 static struct snd_soc_codec *wm8974_codec;
  58
  59 /*
  60  * read wm8974 register cache
  61  */
  62 static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec *codec,
  63         unsigned int reg)
  64 {
  65         u16 *cache = codec->reg_cache;
  66         if (reg == WM8974_RESET)
  67                 return 0;
  68         if (reg >= WM8974_CACHEREGNUM)
  69                 return -1;
  70         return cache[reg];
  71 }
  72
  73 /*
  74  * write wm8974 register cache
  75  */
  76 static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
  77         u16 reg, unsigned int value)
  78 {
  79         u16 *cache = codec->reg_cache;
  80         if (reg >= WM8974_CACHEREGNUM)
  81                 return;
  82         cache[reg] = value;
  83 }
  84
  85 /*
  86  * write to the WM8974 register space
  87  */
  88 static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
  89         unsigned int value)
  90 {
  91         u8 data[2];
  92
  93         /* data is
  94          *   D15..D9 WM8974 register offset
  95          *   D8...D0 register data
  96          */
  97         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
  98         data[1] = value & 0x00ff;
  99
 100         wm8974_write_reg_cache(codec, reg, value);
 101         if (codec->hw_write(codec->control_data, data, 2) == 2)
 102                 return 0;
 103         else
 104                 return -EIO;
 105 }
 106
 107 #define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
 108
 109 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 110 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
 111 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
 112 static const char *wm8974_bw[] = {"Narrow", "Wide" };
 113 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
 114 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
 115 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
 116 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
 117 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
 118 static const char *wm8974_alc[] = {"ALC", "Limiter" };
 119
 120 static const struct soc_enum wm8974_enum[] = {
 121         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
 122         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
 123         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
 124         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
 125
 126         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
 127         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
 128         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
 129         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
 130
 131         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
 132         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
 133         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
 134         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
 135
 136         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
 137         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
 138 };
 139
 140 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 141
 142 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 143
 144 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 145 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 146
 147 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 148 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 149
 150 SOC_SINGLE("PCM Volume", WM8974_DACVOL, 0, 127, 0),
 151
 152 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 153 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 154 SOC_SINGLE("ADC Inversion Switch", WM8974_COMP, 0, 1, 0),
 155
 156 SOC_SINGLE("Capture Volume", WM8974_ADCVOL,  0, 127, 0),
 157
 158 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 159 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 160 SOC_SINGLE("EQ1 Volume", WM8974_EQ1,  0, 31, 1),
 161
 162 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 163 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 164 SOC_SINGLE("EQ2 Volume", WM8974_EQ2,  0, 31, 1),
 165
 166 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 167 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 168 SOC_SINGLE("EQ3 Volume", WM8974_EQ3,  0, 31, 1),
 169
 170 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 171 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 172 SOC_SINGLE("EQ4 Volume", WM8974_EQ4,  0, 31, 1),
 173
 174 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 175 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 176 SOC_SINGLE("EQ5 Volume", WM8974_EQ5,  0, 31, 1),
 177
 178 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 179 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 180 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 181
 182 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 183 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 184
 185 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 186 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 187 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 188
 189 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 190 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 191 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 192
 193 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 194 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 195 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 196
 197 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 198 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 199
 200 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 201 SOC_SINGLE("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0),
 202
 203 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 204 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 205 SOC_SINGLE("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0),
 206
 207 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 208 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 0),
 209 };
 210
 211 /* Speaker Output Mixer */
 212 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 213 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 214 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 215 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
 216 };
 217
 218 /* Mono Output Mixer */
 219 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 220 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 221 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 222 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 1),
 223 };
 224
 225 /* AUX Input boost vol */
 226 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 227 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 228
 229 /* Mic Input boost vol */
 230 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 231 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 232
 233 /* Capture boost switch */
 234 static const struct snd_kcontrol_new wm8974_capture_boost_controls =
 235 SOC_DAPM_SINGLE("Capture Boost Switch", WM8974_INPPGA,  6, 1, 0);
 236
 237 /* Aux In to PGA */
 238 static const struct snd_kcontrol_new wm8974_aux_capture_boost_controls =
 239 SOC_DAPM_SINGLE("Aux Capture Boost Switch", WM8974_INPPGA,  2, 1, 0);
 240
 241 /* Mic P In to PGA */
 242 static const struct snd_kcontrol_new wm8974_micp_capture_boost_controls =
 243 SOC_DAPM_SINGLE("Mic P Capture Boost Switch", WM8974_INPPGA,  0, 1, 0);
 244
 245 /* Mic N In to PGA */
 246 static const struct snd_kcontrol_new wm8974_micn_capture_boost_controls =
 247 SOC_DAPM_SINGLE("Mic N Capture Boost Switch", WM8974_INPPGA,  1, 1, 0);
 248
 249 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 250 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 251         &wm8974_speaker_mixer_controls[0],
 252         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 253 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 254         &wm8974_mono_mixer_controls[0],
 255         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 256 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 257 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER3, 0, 0),
 258 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 259 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 260 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 261 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 262 SND_SOC_DAPM_PGA("Mic PGA", WM8974_POWER2, 2, 0, NULL, 0),
 263
 264 SND_SOC_DAPM_PGA("Aux Boost", SND_SOC_NOPM, 0, 0,
 265         &wm8974_aux_boost_controls, 1),
 266 SND_SOC_DAPM_PGA("Mic Boost", SND_SOC_NOPM, 0, 0,
 267         &wm8974_mic_boost_controls, 1),
 268 SND_SOC_DAPM_SWITCH("Capture Boost", SND_SOC_NOPM, 0, 0,
 269         &wm8974_capture_boost_controls),
 270
 271 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, NULL, 0),
 272
 273 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 274
 275 SND_SOC_DAPM_INPUT("MICN"),
 276 SND_SOC_DAPM_INPUT("MICP"),
 277 SND_SOC_DAPM_INPUT("AUX"),
 278 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 279 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 280 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 281 };
 282
 283 static const struct snd_soc_dapm_route audio_map[] = {
 284         /* Mono output mixer */
 285         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 286         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 287         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 288
 289         /* Speaker output mixer */
 290         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 291         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 292         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 293
 294         /* Outputs */
 295         {"Mono Out", NULL, "Mono Mixer"},
 296         {"MONOOUT", NULL, "Mono Out"},
 297         {"SpkN Out", NULL, "Speaker Mixer"},
 298         {"SpkP Out", NULL, "Speaker Mixer"},
 299         {"SPKOUTN", NULL, "SpkN Out"},
 300         {"SPKOUTP", NULL, "SpkP Out"},
 301
 302         /* Boost Mixer */
 303         {"Boost Mixer", NULL, "ADC"},
 304         {"Capture Boost Switch", "Aux Capture Boost Switch", "AUX"},
 305         {"Aux Boost", "Aux Volume", "Boost Mixer"},
 306         {"Capture Boost", "Capture Switch", "Boost Mixer"},
 307         {"Mic Boost", "Mic Volume", "Boost Mixer"},
 308
 309         /* Inputs */
 310         {"MICP", NULL, "Mic Boost"},
 311         {"MICN", NULL, "Mic PGA"},
 312         {"Mic PGA", NULL, "Capture Boost"},
 313         {"AUX", NULL, "Aux Input"},
 314 };
 315
 316 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 317 {
 318         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
 319                                   ARRAY_SIZE(wm8974_dapm_widgets));
 320
 321         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 322
 323         snd_soc_dapm_new_widgets(codec);
 324         return 0;
 325 }
 326
 327 struct pll_ {
 328         unsigned int in_hz, out_hz;
 329         unsigned int pre:4; /* prescale - 1 */
 330         unsigned int n:4;
 331         unsigned int k;
 332 };
 333
 334 static struct pll_ pll[] = {
 335         { 12000000, 11289600, 0, 7, 0x86c220 },
 336         { 12000000, 12288000, 0, 8, 0x3126e8 },
 337         { 13000000, 11289600, 0, 6, 0xf28bd4 },
 338         { 13000000, 12288000, 0, 7, 0x8fd525 },
 339         { 12288000, 11289600, 0, 7, 0x59999a },
 340         { 11289600, 12288000, 0, 8, 0x80dee9 },
 341         { 25000000, 11289600, 1, 7, 0x39B024 },
 342         { 25000000, 24576000, 1, 7, 0xdd4413 }
 343 };
 344
 345 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
 346                 int pll_id, unsigned int freq_in, unsigned int freq_out)
 347 {
 348         struct snd_soc_codec *codec = codec_dai->codec;
 349         int i;
 350         u16 reg;
 351
 352         if (freq_in == 0 || freq_out == 0) {
 353                 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
 354                 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
 355                 return 0;
 356         }
 357
 358         for (i = 0; i < ARRAY_SIZE(pll); i++) {
 359                 if (freq_in == pll[i].in_hz && freq_out == pll[i].out_hz) {
 360                         wm8974_write(codec, WM8974_PLLN,
 361                                      (pll[i].pre << 4) | pll[i].n);
 362                         wm8974_write(codec, WM8974_PLLK1, pll[i].k >> 18);
 363                         wm8974_write(codec, WM8974_PLLK2,
 364                                      (pll[i].k >> 9) & 0x1ff);
 365                         wm8974_write(codec, WM8974_PLLK3, pll[i].k & 0x1ff);
 366                         reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
 367                         wm8974_write(codec, WM8974_POWER1, reg | 0x020);
 368                         return 0;
 369                 }
 370         }
 371
 372         return -EINVAL;
 373 }
 374
 375 /*
 376  * Configure WM8974 clock dividers.
 377  */
 378 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 379                 int div_id, int div)
 380 {
 381         struct snd_soc_codec *codec = codec_dai->codec;
 382         u16 reg;
 383
 384         switch (div_id) {
 385         case WM8974_OPCLKDIV:
 386                 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
 387                 wm8974_write(codec, WM8974_GPIO, reg | div);
 388                 break;
 389         case WM8974_MCLKDIV:
 390                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
 391                 wm8974_write(codec, WM8974_CLOCK, reg | div);
 392                 break;
 393         case WM8974_ADCCLK:
 394                 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
 395                 wm8974_write(codec, WM8974_ADC, reg | div);
 396                 break;
 397         case WM8974_DACCLK:
 398                 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
 399                 wm8974_write(codec, WM8974_DAC, reg | div);
 400                 break;
 401         case WM8974_BCLKDIV:
 402                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
 403                 wm8974_write(codec, WM8974_CLOCK, reg | div);
 404                 break;
 405         default:
 406                 return -EINVAL;
 407         }
 408
 409         return 0;
 410 }
 411
 412 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 413                 unsigned int fmt)
 414 {
 415         struct snd_soc_codec *codec = codec_dai->codec;
 416         u16 iface = 0;
 417         u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
 418
 419         /* set master/slave audio interface */
 420         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 421         case SND_SOC_DAIFMT_CBM_CFM:
 422                 clk |= 0x0001;
 423                 break;
 424         case SND_SOC_DAIFMT_CBS_CFS:
 425                 break;
 426         default:
 427                 return -EINVAL;
 428         }
 429
 430         /* interface format */
 431         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 432         case SND_SOC_DAIFMT_I2S:
 433                 iface |= 0x0010;
 434                 break;
 435         case SND_SOC_DAIFMT_RIGHT_J:
 436                 break;
 437         case SND_SOC_DAIFMT_LEFT_J:
 438                 iface |= 0x0008;
 439                 break;
 440         case SND_SOC_DAIFMT_DSP_A:
 441                 iface |= 0x00018;
 442                 break;
 443         default:
 444                 return -EINVAL;
 445         }
 446
 447         /* clock inversion */
 448         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 449         case SND_SOC_DAIFMT_NB_NF:
 450                 break;
 451         case SND_SOC_DAIFMT_IB_IF:
 452                 iface |= 0x0180;
 453                 break;
 454         case SND_SOC_DAIFMT_IB_NF:
 455                 iface |= 0x0100;
 456                 break;
 457         case SND_SOC_DAIFMT_NB_IF:
 458                 iface |= 0x0080;
 459                 break;
 460         default:
 461                 return -EINVAL;
 462         }
 463
 464         wm8974_write(codec, WM8974_IFACE, iface);
 465         wm8974_write(codec, WM8974_CLOCK, clk);
 466         return 0;
 467 }
 468
 469 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 470                                 struct snd_pcm_hw_params *params,
 471                                 struct snd_soc_dai *dai)
 472 {
 473         struct snd_soc_codec *codec = dai->codec;
 474         u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
 475         u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
 476
 477         /* bit size */
 478         switch (params_format(params)) {
 479         case SNDRV_PCM_FORMAT_S16_LE:
 480                 break;
 481         case SNDRV_PCM_FORMAT_S20_3LE:
 482                 iface |= 0x0020;
 483                 break;
 484         case SNDRV_PCM_FORMAT_S24_LE:
 485                 iface |= 0x0040;
 486                 break;
 487         case SNDRV_PCM_FORMAT_S32_LE:
 488                 iface |= 0x0060;
 489                 break;
 490         }
 491
 492         /* filter coefficient */
 493         switch (params_rate(params)) {
 494         case SNDRV_PCM_RATE_8000:
 495                 adn |= 0x5 << 1;
 496                 break;
 497         case SNDRV_PCM_RATE_11025:
 498                 adn |= 0x4 << 1;
 499                 break;
 500         case SNDRV_PCM_RATE_16000:
 501                 adn |= 0x3 << 1;
 502                 break;
 503         case SNDRV_PCM_RATE_22050:
 504                 adn |= 0x2 << 1;
 505                 break;
 506         case SNDRV_PCM_RATE_32000:
 507                 adn |= 0x1 << 1;
 508                 break;
 509         case SNDRV_PCM_RATE_44100:
 510                 break;
 511         }
 512
 513         wm8974_write(codec, WM8974_IFACE, iface);
 514         wm8974_write(codec, WM8974_ADD, adn);
 515         return 0;
 516 }
 517
 518 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 519 {
 520         struct snd_soc_codec *codec = dai->codec;
 521         u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
 522
 523         if (mute)
 524                 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
 525         else
 526                 wm8974_write(codec, WM8974_DAC, mute_reg);
 527         return 0;
 528 }
 529
 530 /* liam need to make this lower power with dapm */
 531 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 532         enum snd_soc_bias_level level)
 533 {
 534         u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
 535
 536         switch (level) {
 537         case SND_SOC_BIAS_ON:
 538         case SND_SOC_BIAS_PREPARE:
 539                 power1 |= 0x1;  /* VMID 50k */
 540                 wm8974_write(codec, WM8974_POWER1, power1);
 541                 break;
 542
 543         case SND_SOC_BIAS_STANDBY:
 544                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 545
 546                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 547                         /* Initial cap charge at VMID 5k */
 548                         wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
 549                         mdelay(100);
 550                 }
 551
 552                 power1 |= 0x2;  /* VMID 500k */
 553                 wm8974_write(codec, WM8974_POWER1, power1);
 554                 break;
 555
 556         case SND_SOC_BIAS_OFF:
 557                 wm8974_write(codec, WM8974_POWER1, 0);
 558                 wm8974_write(codec, WM8974_POWER2, 0);
 559                 wm8974_write(codec, WM8974_POWER3, 0);
 560                 break;
 561         }
 562
 563         codec->bias_level = level;
 564         return 0;
 565 }
 566
 567 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 568
 569 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 570         SNDRV_PCM_FMTBIT_S24_LE)
 571
 572 static struct snd_soc_dai_ops wm8974_ops = {
 573         .hw_params = wm8974_pcm_hw_params,
 574         .digital_mute = wm8974_mute,
 575         .set_fmt = wm8974_set_dai_fmt,
 576         .set_clkdiv = wm8974_set_dai_clkdiv,
 577         .set_pll = wm8974_set_dai_pll,
 578 };
 579
 580 struct snd_soc_dai wm8974_dai = {
 581         .name = "WM8974 HiFi",
 582         .playback = {
 583                 .stream_name = "Playback",
 584                 .channels_min = 1,
 585                 .channels_max = 2,   /* Only 1 channel of data */
 586                 .rates = WM8974_RATES,
 587                 .formats = WM8974_FORMATS,},
 588         .capture = {
 589                 .stream_name = "Capture",
 590                 .channels_min = 1,
 591                 .channels_max = 2,   /* Only 1 channel of data */
 592                 .rates = WM8974_RATES,
 593                 .formats = WM8974_FORMATS,},
 594         .ops = &wm8974_ops,
 595 };
 596 EXPORT_SYMBOL_GPL(wm8974_dai);
 597
 598 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
 599 {
 600         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 601         struct snd_soc_codec *codec = socdev->card->codec;
 602
 603         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 604         return 0;
 605 }
 606
 607 static int wm8974_resume(struct platform_device *pdev)
 608 {
 609         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 610         struct snd_soc_codec *codec = socdev->card->codec;
 611         int i;
 612         u8 data[2];
 613         u16 *cache = codec->reg_cache;
 614
 615         /* Sync reg_cache with the hardware */
 616         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 617                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 618                 data[1] = cache[i] & 0x00ff;
 619                 codec->hw_write(codec->control_data, data, 2);
 620         }
 621         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 622         wm8974_set_bias_level(codec, codec->suspend_bias_level);
 623         return 0;
 624 }
 625
 626 static int wm8974_probe(struct platform_device *pdev)
 627 {
 628         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 629         struct snd_soc_codec *codec;
 630         int ret = 0;
 631
 632         if (wm8974_codec == NULL) {
 633                 dev_err(&pdev->dev, "Codec device not registered\n");
 634                 return -ENODEV;
 635         }
 636
 637         socdev->card->codec = wm8974_codec;
 638         codec = wm8974_codec;
 639
 640         /* register pcms */
 641         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 642         if (ret < 0) {
 643                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 644                 goto pcm_err;
 645         }
 646
 647         snd_soc_add_controls(codec, wm8974_snd_controls,
 648                              ARRAY_SIZE(wm8974_snd_controls));
 649         wm8974_add_widgets(codec);
 650         ret = snd_soc_init_card(socdev);
 651         if (ret < 0) {
 652                 dev_err(codec->dev, "failed to register card: %d\n", ret);
 653                 goto card_err;
 654         }
 655
 656         return ret;
 657
 658 card_err:
 659         snd_soc_free_pcms(socdev);
 660         snd_soc_dapm_free(socdev);
 661 pcm_err:
 662         return ret;
 663 }
 664
 665 /* power down chip */
 666 static int wm8974_remove(struct platform_device *pdev)
 667 {
 668         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 669
 670         snd_soc_free_pcms(socdev);
 671         snd_soc_dapm_free(socdev);
 672
 673         return 0;
 674 }
 675
 676 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
 677         .probe =        wm8974_probe,
 678         .remove =       wm8974_remove,
 679         .suspend =      wm8974_suspend,
 680         .resume =       wm8974_resume,
 681 };
 682 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
 683
 684 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
 685 {
 686         int ret;
 687         struct snd_soc_codec *codec = &wm8974->codec;
 688
 689         if (wm8974_codec) {
 690                 dev_err(codec->dev, "Another WM8974 is registered\n");
 691                 return -EINVAL;
 692         }
 693
 694         mutex_init(&codec->mutex);
 695         INIT_LIST_HEAD(&codec->dapm_widgets);
 696         INIT_LIST_HEAD(&codec->dapm_paths);
 697
 698         codec->private_data = wm8974;
 699         codec->name = "WM8974";
 700         codec->owner = THIS_MODULE;
 701         codec->read = wm8974_read_reg_cache;
 702         codec->write = wm8974_write;
 703         codec->bias_level = SND_SOC_BIAS_OFF;
 704         codec->set_bias_level = wm8974_set_bias_level;
 705         codec->dai = &wm8974_dai;
 706         codec->num_dai = 1;
 707         codec->reg_cache_size = WM8974_CACHEREGNUM;
 708         codec->reg_cache = &wm8974->reg_cache;
 709
 710         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 711
 712         ret = wm8974_reset(codec);
 713         if (ret < 0) {
 714                 dev_err(codec->dev, "Failed to issue reset\n");
 715                 return ret;
 716         }
 717
 718         wm8974_dai.dev = codec->dev;
 719
 720         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 721
 722         wm8974_codec = codec;
 723
 724         ret = snd_soc_register_codec(codec);
 725         if (ret != 0) {
 726                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 727                 return ret;
 728         }
 729
 730         ret = snd_soc_register_dai(&wm8974_dai);
 731         if (ret != 0) {
 732                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 733                 snd_soc_unregister_codec(codec);
 734                 return ret;
 735         }
 736
 737         return 0;
 738 }
 739
 740 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
 741 {
 742         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
 743         snd_soc_unregister_dai(&wm8974_dai);
 744         snd_soc_unregister_codec(&wm8974->codec);
 745         kfree(wm8974);
 746         wm8974_codec = NULL;
 747 }
 748
 749 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 750                                       const struct i2c_device_id *id)
 751 {
 752         struct wm8974_priv *wm8974;
 753         struct snd_soc_codec *codec;
 754
 755         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 756         if (wm8974 == NULL)
 757                 return -ENOMEM;
 758
 759         codec = &wm8974->codec;
 760         codec->hw_write = (hw_write_t)i2c_master_send;
 761
 762         i2c_set_clientdata(i2c, wm8974);
 763         codec->control_data = i2c;
 764
 765         codec->dev = &i2c->dev;
 766
 767         return wm8974_register(wm8974);
 768 }
 769
 770 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 771 {
 772         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
 773         wm8974_unregister(wm8974);
 774         return 0;
 775 }
 776
 777 static const struct i2c_device_id wm8974_i2c_id[] = {
 778         { "wm8974", 0 },
 779         { }
 780 };
 781 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 782
 783 static struct i2c_driver wm8974_i2c_driver = {
 784         .driver = {
 785                 .name = "WM8974 I2C Codec",
 786                 .owner = THIS_MODULE,
 787         },
 788         .probe =    wm8974_i2c_probe,
 789         .remove =   __devexit_p(wm8974_i2c_remove),
 790         .id_table = wm8974_i2c_id,
 791 };
 792
 793 static int __init wm8974_modinit(void)
 794 {
 795         return i2c_add_driver(&wm8974_i2c_driver);
 796 }
 797 module_init(wm8974_modinit);
 798
 799 static void __exit wm8974_exit(void)
 800 {
 801         i2c_del_driver(&wm8974_i2c_driver);
 802 }
 803 module_exit(wm8974_exit);
 804
 805 MODULE_DESCRIPTION("ASoC WM8974 driver");
 806 MODULE_AUTHOR("Liam Girdwood");
 807 MODULE_LICENSE("GPL");