sound/soc/codecs/wm8974.c

   1 /*
   2  * wm8974.c  --  WM8974 ALSA Soc Audio driver
   3  *
   4  * Copyright 2006-2009 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/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/slab.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/initval.h>
  27 #include <sound/tlv.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 0x04
  51
  52 struct wm8974_priv {
  53         enum snd_soc_control_type control_type;
  54 };
  55
  56 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  57
  58 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  59 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  60 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  61 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  62 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  63 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  64 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  65 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  66 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  67 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  68
  69 static const struct soc_enum wm8974_enum[] = {
  70         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  71         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  72         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  73         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  74
  75         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  76         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  77         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  78         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  79
  80         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  81         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  82         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  83         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  84
  85         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  86         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  87 };
  88
  89 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  90
  91 static const struct soc_enum wm8974_auxmode =
  92         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
  93
  94 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  95 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  96 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
  97 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
  98
  99 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 100
 101 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 102
 103 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 104 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 105
 106 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 107 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 108
 109 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 110
 111 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 112 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 113 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 114
 115 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 116
 117 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 118 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 119 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 120
 121 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 122 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 123 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 124
 125 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 126 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 127 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 128
 129 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 130 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 131 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 132
 133 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 134 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 135 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 136
 137 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 138 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 139 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 140
 141 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 142 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 143
 144 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 145 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 146 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 147
 148 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 149 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 150 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 151
 152 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 153 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 154 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 155
 156 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 157 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 158
 159 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 160 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 161
 162 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 163 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 164 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 165
 166 SOC_ENUM("Aux Mode", wm8974_auxmode),
 167
 168 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 169 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 170
 171 /* DAC / ADC oversampling */
 172 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 173 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 174 };
 175
 176 /* Speaker Output Mixer */
 177 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 178 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 179 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 180 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 181 };
 182
 183 /* Mono Output Mixer */
 184 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 186 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 187 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 188 };
 189
 190 /* Boost mixer */
 191 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 193 };
 194
 195 /* Input PGA */
 196 static const struct snd_kcontrol_new wm8974_inpga[] = {
 197 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 198 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 199 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 200 };
 201
 202 /* AUX Input boost vol */
 203 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 204 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 205
 206 /* Mic Input boost vol */
 207 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 208 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 209
 210 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 211 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 212         &wm8974_speaker_mixer_controls[0],
 213         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 214 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 215         &wm8974_mono_mixer_controls[0],
 216         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 217 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 218 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 219 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 220 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 221 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 222 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 223
 224 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 225                    ARRAY_SIZE(wm8974_inpga)),
 226 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 227                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 228
 229 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 230
 231 SND_SOC_DAPM_INPUT("MICN"),
 232 SND_SOC_DAPM_INPUT("MICP"),
 233 SND_SOC_DAPM_INPUT("AUX"),
 234 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 235 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 236 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 237 };
 238
 239 static const struct snd_soc_dapm_route audio_map[] = {
 240         /* Mono output mixer */
 241         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 242         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 243         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 244
 245         /* Speaker output mixer */
 246         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 247         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 248         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 249
 250         /* Outputs */
 251         {"Mono Out", NULL, "Mono Mixer"},
 252         {"MONOOUT", NULL, "Mono Out"},
 253         {"SpkN Out", NULL, "Speaker Mixer"},
 254         {"SpkP Out", NULL, "Speaker Mixer"},
 255         {"SPKOUTN", NULL, "SpkN Out"},
 256         {"SPKOUTP", NULL, "SpkP Out"},
 257
 258         /* Boost Mixer */
 259         {"ADC", NULL, "Boost Mixer"},
 260         {"Boost Mixer", "Aux Switch", "Aux Input"},
 261         {"Boost Mixer", NULL, "Input PGA"},
 262         {"Boost Mixer", NULL, "MICP"},
 263
 264         /* Input PGA */
 265         {"Input PGA", "Aux Switch", "Aux Input"},
 266         {"Input PGA", "MicN Switch", "MICN"},
 267         {"Input PGA", "MicP Switch", "MICP"},
 268
 269         /* Inputs */
 270         {"Aux Input", NULL, "AUX"},
 271 };
 272
 273 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 274 {
 275         struct snd_soc_dapm_context *dapm = &codec->dapm;
 276
 277         snd_soc_dapm_new_controls(dapm, wm8974_dapm_widgets,
 278                                   ARRAY_SIZE(wm8974_dapm_widgets));
 279         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 280
 281         return 0;
 282 }
 283
 284 struct pll_ {
 285         unsigned int pre_div:1;
 286         unsigned int n:4;
 287         unsigned int k;
 288 };
 289
 290 /* The size in bits of the pll divide multiplied by 10
 291  * to allow rounding later */
 292 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 293
 294 static void pll_factors(struct pll_ *pll_div,
 295                         unsigned int target, unsigned int source)
 296 {
 297         unsigned long long Kpart;
 298         unsigned int K, Ndiv, Nmod;
 299
 300         /* There is a fixed divide by 4 in the output path */
 301         target *= 4;
 302
 303         Ndiv = target / source;
 304         if (Ndiv < 6) {
 305                 source /= 2;
 306                 pll_div->pre_div = 1;
 307                 Ndiv = target / source;
 308         } else
 309                 pll_div->pre_div = 0;
 310
 311         if ((Ndiv < 6) || (Ndiv > 12))
 312                 printk(KERN_WARNING
 313                         "WM8974 N value %u outwith recommended range!\n",
 314                         Ndiv);
 315
 316         pll_div->n = Ndiv;
 317         Nmod = target % source;
 318         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 319
 320         do_div(Kpart, source);
 321
 322         K = Kpart & 0xFFFFFFFF;
 323
 324         /* Check if we need to round */
 325         if ((K % 10) >= 5)
 326                 K += 5;
 327
 328         /* Move down to proper range now rounding is done */
 329         K /= 10;
 330
 331         pll_div->k = K;
 332 }
 333
 334 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 335                 int source, unsigned int freq_in, unsigned int freq_out)
 336 {
 337         struct snd_soc_codec *codec = codec_dai->codec;
 338         struct pll_ pll_div;
 339         u16 reg;
 340
 341         if (freq_in == 0 || freq_out == 0) {
 342                 /* Clock CODEC directly from MCLK */
 343                 reg = snd_soc_read(codec, WM8974_CLOCK);
 344                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 345
 346                 /* Turn off PLL */
 347                 reg = snd_soc_read(codec, WM8974_POWER1);
 348                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 349                 return 0;
 350         }
 351
 352         pll_factors(&pll_div, freq_out, freq_in);
 353
 354         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 355         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 356         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 357         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 358         reg = snd_soc_read(codec, WM8974_POWER1);
 359         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 360
 361         /* Run CODEC from PLL instead of MCLK */
 362         reg = snd_soc_read(codec, WM8974_CLOCK);
 363         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 364
 365         return 0;
 366 }
 367
 368 /*
 369  * Configure WM8974 clock dividers.
 370  */
 371 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 372                 int div_id, int div)
 373 {
 374         struct snd_soc_codec *codec = codec_dai->codec;
 375         u16 reg;
 376
 377         switch (div_id) {
 378         case WM8974_OPCLKDIV:
 379                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 380                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 381                 break;
 382         case WM8974_MCLKDIV:
 383                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 384                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 385                 break;
 386         case WM8974_BCLKDIV:
 387                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 388                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 389                 break;
 390         default:
 391                 return -EINVAL;
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 398                 unsigned int fmt)
 399 {
 400         struct snd_soc_codec *codec = codec_dai->codec;
 401         u16 iface = 0;
 402         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 403
 404         /* set master/slave audio interface */
 405         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 406         case SND_SOC_DAIFMT_CBM_CFM:
 407                 clk |= 0x0001;
 408                 break;
 409         case SND_SOC_DAIFMT_CBS_CFS:
 410                 break;
 411         default:
 412                 return -EINVAL;
 413         }
 414
 415         /* interface format */
 416         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 417         case SND_SOC_DAIFMT_I2S:
 418                 iface |= 0x0010;
 419                 break;
 420         case SND_SOC_DAIFMT_RIGHT_J:
 421                 break;
 422         case SND_SOC_DAIFMT_LEFT_J:
 423                 iface |= 0x0008;
 424                 break;
 425         case SND_SOC_DAIFMT_DSP_A:
 426                 iface |= 0x00018;
 427                 break;
 428         default:
 429                 return -EINVAL;
 430         }
 431
 432         /* clock inversion */
 433         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 434         case SND_SOC_DAIFMT_NB_NF:
 435                 break;
 436         case SND_SOC_DAIFMT_IB_IF:
 437                 iface |= 0x0180;
 438                 break;
 439         case SND_SOC_DAIFMT_IB_NF:
 440                 iface |= 0x0100;
 441                 break;
 442         case SND_SOC_DAIFMT_NB_IF:
 443                 iface |= 0x0080;
 444                 break;
 445         default:
 446                 return -EINVAL;
 447         }
 448
 449         snd_soc_write(codec, WM8974_IFACE, iface);
 450         snd_soc_write(codec, WM8974_CLOCK, clk);
 451         return 0;
 452 }
 453
 454 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 455                                 struct snd_pcm_hw_params *params,
 456                                 struct snd_soc_dai *dai)
 457 {
 458         struct snd_soc_codec *codec = dai->codec;
 459         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 460         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 461
 462         /* bit size */
 463         switch (params_format(params)) {
 464         case SNDRV_PCM_FORMAT_S16_LE:
 465                 break;
 466         case SNDRV_PCM_FORMAT_S20_3LE:
 467                 iface |= 0x0020;
 468                 break;
 469         case SNDRV_PCM_FORMAT_S24_LE:
 470                 iface |= 0x0040;
 471                 break;
 472         case SNDRV_PCM_FORMAT_S32_LE:
 473                 iface |= 0x0060;
 474                 break;
 475         }
 476
 477         /* filter coefficient */
 478         switch (params_rate(params)) {
 479         case 8000:
 480                 adn |= 0x5 << 1;
 481                 break;
 482         case 11025:
 483                 adn |= 0x4 << 1;
 484                 break;
 485         case 16000:
 486                 adn |= 0x3 << 1;
 487                 break;
 488         case 22050:
 489                 adn |= 0x2 << 1;
 490                 break;
 491         case 32000:
 492                 adn |= 0x1 << 1;
 493                 break;
 494         case 44100:
 495         case 48000:
 496                 break;
 497         }
 498
 499         snd_soc_write(codec, WM8974_IFACE, iface);
 500         snd_soc_write(codec, WM8974_ADD, adn);
 501         return 0;
 502 }
 503
 504 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 505 {
 506         struct snd_soc_codec *codec = dai->codec;
 507         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 508
 509         if (mute)
 510                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 511         else
 512                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 513         return 0;
 514 }
 515
 516 /* liam need to make this lower power with dapm */
 517 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 518         enum snd_soc_bias_level level)
 519 {
 520         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 521
 522         switch (level) {
 523         case SND_SOC_BIAS_ON:
 524         case SND_SOC_BIAS_PREPARE:
 525                 power1 |= 0x1;  /* VMID 50k */
 526                 snd_soc_write(codec, WM8974_POWER1, power1);
 527                 break;
 528
 529         case SND_SOC_BIAS_STANDBY:
 530                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 531
 532                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 533                         /* Initial cap charge at VMID 5k */
 534                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 535                         mdelay(100);
 536                 }
 537
 538                 power1 |= 0x2;  /* VMID 500k */
 539                 snd_soc_write(codec, WM8974_POWER1, power1);
 540                 break;
 541
 542         case SND_SOC_BIAS_OFF:
 543                 snd_soc_write(codec, WM8974_POWER1, 0);
 544                 snd_soc_write(codec, WM8974_POWER2, 0);
 545                 snd_soc_write(codec, WM8974_POWER3, 0);
 546                 break;
 547         }
 548
 549         codec->dapm.bias_level = level;
 550         return 0;
 551 }
 552
 553 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 554
 555 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 556         SNDRV_PCM_FMTBIT_S24_LE)
 557
 558 static struct snd_soc_dai_ops wm8974_ops = {
 559         .hw_params = wm8974_pcm_hw_params,
 560         .digital_mute = wm8974_mute,
 561         .set_fmt = wm8974_set_dai_fmt,
 562         .set_clkdiv = wm8974_set_dai_clkdiv,
 563         .set_pll = wm8974_set_dai_pll,
 564 };
 565
 566 static struct snd_soc_dai_driver wm8974_dai = {
 567         .name = "wm8974-hifi",
 568         .playback = {
 569                 .stream_name = "Playback",
 570                 .channels_min = 1,
 571                 .channels_max = 2,   /* Only 1 channel of data */
 572                 .rates = WM8974_RATES,
 573                 .formats = WM8974_FORMATS,},
 574         .capture = {
 575                 .stream_name = "Capture",
 576                 .channels_min = 1,
 577                 .channels_max = 2,   /* Only 1 channel of data */
 578                 .rates = WM8974_RATES,
 579                 .formats = WM8974_FORMATS,},
 580         .ops = &wm8974_ops,
 581         .symmetric_rates = 1,
 582 };
 583
 584 static int wm8974_suspend(struct snd_soc_codec *codec, pm_message_t state)
 585 {
 586         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 587         return 0;
 588 }
 589
 590 static int wm8974_resume(struct snd_soc_codec *codec)
 591 {
 592         int i;
 593         u8 data[2];
 594         u16 *cache = codec->reg_cache;
 595
 596         /* Sync reg_cache with the hardware */
 597         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 598                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 599                 data[1] = cache[i] & 0x00ff;
 600                 codec->hw_write(codec->control_data, data, 2);
 601         }
 602         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 603
 604         return 0;
 605 }
 606
 607 static int wm8974_probe(struct snd_soc_codec *codec)
 608 {
 609         int ret = 0;
 610
 611         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 612         if (ret < 0) {
 613                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 614                 return ret;
 615         }
 616
 617         ret = wm8974_reset(codec);
 618         if (ret < 0) {
 619                 dev_err(codec->dev, "Failed to issue reset\n");
 620                 return ret;
 621         }
 622
 623         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 624         snd_soc_add_controls(codec, wm8974_snd_controls,
 625                              ARRAY_SIZE(wm8974_snd_controls));
 626         wm8974_add_widgets(codec);
 627
 628         return ret;
 629 }
 630
 631 /* power down chip */
 632 static int wm8974_remove(struct snd_soc_codec *codec)
 633 {
 634         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 635         return 0;
 636 }
 637
 638 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
 639         .probe =        wm8974_probe,
 640         .remove =       wm8974_remove,
 641         .suspend =      wm8974_suspend,
 642         .resume =       wm8974_resume,
 643         .set_bias_level = wm8974_set_bias_level,
 644         .reg_cache_size = ARRAY_SIZE(wm8974_reg),
 645         .reg_word_size = sizeof(u16),
 646         .reg_cache_default = wm8974_reg,
 647 };
 648
 649 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 650 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 651                                       const struct i2c_device_id *id)
 652 {
 653         struct wm8974_priv *wm8974;
 654         int ret;
 655
 656         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 657         if (wm8974 == NULL)
 658                 return -ENOMEM;
 659
 660         i2c_set_clientdata(i2c, wm8974);
 661
 662         ret = snd_soc_register_codec(&i2c->dev,
 663                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
 664         if (ret < 0)
 665                 kfree(wm8974);
 666         return ret;
 667 }
 668
 669 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 670 {
 671         snd_soc_unregister_codec(&client->dev);
 672         kfree(i2c_get_clientdata(client));
 673         return 0;
 674 }
 675
 676 static const struct i2c_device_id wm8974_i2c_id[] = {
 677         { "wm8974", 0 },
 678         { }
 679 };
 680 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 681
 682 static struct i2c_driver wm8974_i2c_driver = {
 683         .driver = {
 684                 .name = "wm8974-codec",
 685                 .owner = THIS_MODULE,
 686         },
 687         .probe =    wm8974_i2c_probe,
 688         .remove =   __devexit_p(wm8974_i2c_remove),
 689         .id_table = wm8974_i2c_id,
 690 };
 691 #endif
 692
 693 static int __init wm8974_modinit(void)
 694 {
 695         int ret = 0;
 696 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 697         ret = i2c_add_driver(&wm8974_i2c_driver);
 698         if (ret != 0) {
 699                 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n",
 700                        ret);
 701         }
 702 #endif
 703         return ret;
 704 }
 705 module_init(wm8974_modinit);
 706
 707 static void __exit wm8974_exit(void)
 708 {
 709 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 710         i2c_del_driver(&wm8974_i2c_driver);
 711 #endif
 712 }
 713 module_exit(wm8974_exit);
 714
 715 MODULE_DESCRIPTION("ASoC WM8974 driver");
 716 MODULE_AUTHOR("Liam Girdwood");
 717 MODULE_LICENSE("GPL");