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/soc-dapm.h>
  27 #include <sound/initval.h>
  28 #include <sound/tlv.h>
  29
  30 #include "wm8974.h"
  31
  32 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
  33         0x0000, 0x0000, 0x0000, 0x0000,
  34         0x0050, 0x0000, 0x0140, 0x0000,
  35         0x0000, 0x0000, 0x0000, 0x00ff,
  36         0x0000, 0x0000, 0x0100, 0x00ff,
  37         0x0000, 0x0000, 0x012c, 0x002c,
  38         0x002c, 0x002c, 0x002c, 0x0000,
  39         0x0032, 0x0000, 0x0000, 0x0000,
  40         0x0000, 0x0000, 0x0000, 0x0000,
  41         0x0038, 0x000b, 0x0032, 0x0000,
  42         0x0008, 0x000c, 0x0093, 0x00e9,
  43         0x0000, 0x0000, 0x0000, 0x0000,
  44         0x0003, 0x0010, 0x0000, 0x0000,
  45         0x0000, 0x0002, 0x0000, 0x0000,
  46         0x0000, 0x0000, 0x0039, 0x0000,
  47         0x0000,
  48 };
  49
  50 #define WM8974_POWER1_BIASEN  0x08
  51 #define WM8974_POWER1_BUFIOEN 0x04
  52
  53 struct wm8974_priv {
  54         enum snd_soc_control_type control_type;
  55         u16 reg_cache[WM8974_CACHEREGNUM];
  56 };
  57
  58 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  59
  60 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  61 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  62 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  63 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  64 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  65 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  66 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  67 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  68 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  69 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  70
  71 static const struct soc_enum wm8974_enum[] = {
  72         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  73         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  74         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  75         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  76
  77         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  78         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  79         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  80         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  81
  82         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  83         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  84         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  85         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  86
  87         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  88         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  89 };
  90
  91 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  92
  93 static const struct soc_enum wm8974_auxmode =
  94         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
  95
  96 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  97 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  98 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
  99 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 100
 101 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 102
 103 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 104
 105 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 106 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 107
 108 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 109 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 110
 111 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 112
 113 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 114 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 115 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 116
 117 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 118
 119 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 120 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 121 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 122
 123 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 124 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 125 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 126
 127 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 128 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 129 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 130
 131 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 132 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 133 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 134
 135 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 136 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 137 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 138
 139 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 140 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 141 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 142
 143 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 144 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 145
 146 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 147 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 148 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 149
 150 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 151 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 152 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 153
 154 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 155 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 156 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 157
 158 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 159 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 160
 161 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 162 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 163
 164 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 165 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 166 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 167
 168 SOC_ENUM("Aux Mode", wm8974_auxmode),
 169
 170 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 171 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 172
 173 /* DAC / ADC oversampling */
 174 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 175 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 176 };
 177
 178 /* Speaker Output Mixer */
 179 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 180 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 181 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 182 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 183 };
 184
 185 /* Mono Output Mixer */
 186 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 187 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 188 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 189 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 190 };
 191
 192 /* Boost mixer */
 193 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 194 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 195 };
 196
 197 /* Input PGA */
 198 static const struct snd_kcontrol_new wm8974_inpga[] = {
 199 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 200 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 201 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 202 };
 203
 204 /* AUX Input boost vol */
 205 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 206 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 207
 208 /* Mic Input boost vol */
 209 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 210 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 211
 212 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 213 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 214         &wm8974_speaker_mixer_controls[0],
 215         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 216 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 217         &wm8974_mono_mixer_controls[0],
 218         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 219 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 220 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 221 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 222 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 223 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 224 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 225
 226 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 227                    ARRAY_SIZE(wm8974_inpga)),
 228 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 229                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 230
 231 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 232
 233 SND_SOC_DAPM_INPUT("MICN"),
 234 SND_SOC_DAPM_INPUT("MICP"),
 235 SND_SOC_DAPM_INPUT("AUX"),
 236 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 237 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 238 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 239 };
 240
 241 static const struct snd_soc_dapm_route audio_map[] = {
 242         /* Mono output mixer */
 243         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 244         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 245         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 246
 247         /* Speaker output mixer */
 248         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 249         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 250         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 251
 252         /* Outputs */
 253         {"Mono Out", NULL, "Mono Mixer"},
 254         {"MONOOUT", NULL, "Mono Out"},
 255         {"SpkN Out", NULL, "Speaker Mixer"},
 256         {"SpkP Out", NULL, "Speaker Mixer"},
 257         {"SPKOUTN", NULL, "SpkN Out"},
 258         {"SPKOUTP", NULL, "SpkP Out"},
 259
 260         /* Boost Mixer */
 261         {"ADC", NULL, "Boost Mixer"},
 262         {"Boost Mixer", "Aux Switch", "Aux Input"},
 263         {"Boost Mixer", NULL, "Input PGA"},
 264         {"Boost Mixer", NULL, "MICP"},
 265
 266         /* Input PGA */
 267         {"Input PGA", "Aux Switch", "Aux Input"},
 268         {"Input PGA", "MicN Switch", "MICN"},
 269         {"Input PGA", "MicP Switch", "MICP"},
 270
 271         /* Inputs */
 272         {"Aux Input", NULL, "AUX"},
 273 };
 274
 275 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 276 {
 277         struct snd_soc_dapm_context *dapm = &codec->dapm;
 278
 279         snd_soc_dapm_new_controls(dapm, wm8974_dapm_widgets,
 280                                   ARRAY_SIZE(wm8974_dapm_widgets));
 281         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 282
 283         return 0;
 284 }
 285
 286 struct pll_ {
 287         unsigned int pre_div:1;
 288         unsigned int n:4;
 289         unsigned int k;
 290 };
 291
 292 /* The size in bits of the pll divide multiplied by 10
 293  * to allow rounding later */
 294 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 295
 296 static void pll_factors(struct pll_ *pll_div,
 297                         unsigned int target, unsigned int source)
 298 {
 299         unsigned long long Kpart;
 300         unsigned int K, Ndiv, Nmod;
 301
 302         /* There is a fixed divide by 4 in the output path */
 303         target *= 4;
 304
 305         Ndiv = target / source;
 306         if (Ndiv < 6) {
 307                 source /= 2;
 308                 pll_div->pre_div = 1;
 309                 Ndiv = target / source;
 310         } else
 311                 pll_div->pre_div = 0;
 312
 313         if ((Ndiv < 6) || (Ndiv > 12))
 314                 printk(KERN_WARNING
 315                         "WM8974 N value %u outwith recommended range!\n",
 316                         Ndiv);
 317
 318         pll_div->n = Ndiv;
 319         Nmod = target % source;
 320         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 321
 322         do_div(Kpart, source);
 323
 324         K = Kpart & 0xFFFFFFFF;
 325
 326         /* Check if we need to round */
 327         if ((K % 10) >= 5)
 328                 K += 5;
 329
 330         /* Move down to proper range now rounding is done */
 331         K /= 10;
 332
 333         pll_div->k = K;
 334 }
 335
 336 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 337                 int source, unsigned int freq_in, unsigned int freq_out)
 338 {
 339         struct snd_soc_codec *codec = codec_dai->codec;
 340         struct pll_ pll_div;
 341         u16 reg;
 342
 343         if (freq_in == 0 || freq_out == 0) {
 344                 /* Clock CODEC directly from MCLK */
 345                 reg = snd_soc_read(codec, WM8974_CLOCK);
 346                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 347
 348                 /* Turn off PLL */
 349                 reg = snd_soc_read(codec, WM8974_POWER1);
 350                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 351                 return 0;
 352         }
 353
 354         pll_factors(&pll_div, freq_out, freq_in);
 355
 356         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 357         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 358         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 359         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 360         reg = snd_soc_read(codec, WM8974_POWER1);
 361         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 362
 363         /* Run CODEC from PLL instead of MCLK */
 364         reg = snd_soc_read(codec, WM8974_CLOCK);
 365         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 366
 367         return 0;
 368 }
 369
 370 /*
 371  * Configure WM8974 clock dividers.
 372  */
 373 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 374                 int div_id, int div)
 375 {
 376         struct snd_soc_codec *codec = codec_dai->codec;
 377         u16 reg;
 378
 379         switch (div_id) {
 380         case WM8974_OPCLKDIV:
 381                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 382                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 383                 break;
 384         case WM8974_MCLKDIV:
 385                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 386                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 387                 break;
 388         case WM8974_BCLKDIV:
 389                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 390                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 391                 break;
 392         default:
 393                 return -EINVAL;
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 400                 unsigned int fmt)
 401 {
 402         struct snd_soc_codec *codec = codec_dai->codec;
 403         u16 iface = 0;
 404         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 405
 406         /* set master/slave audio interface */
 407         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 408         case SND_SOC_DAIFMT_CBM_CFM:
 409                 clk |= 0x0001;
 410                 break;
 411         case SND_SOC_DAIFMT_CBS_CFS:
 412                 break;
 413         default:
 414                 return -EINVAL;
 415         }
 416
 417         /* interface format */
 418         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 419         case SND_SOC_DAIFMT_I2S:
 420                 iface |= 0x0010;
 421                 break;
 422         case SND_SOC_DAIFMT_RIGHT_J:
 423                 break;
 424         case SND_SOC_DAIFMT_LEFT_J:
 425                 iface |= 0x0008;
 426                 break;
 427         case SND_SOC_DAIFMT_DSP_A:
 428                 iface |= 0x00018;
 429                 break;
 430         default:
 431                 return -EINVAL;
 432         }
 433
 434         /* clock inversion */
 435         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 436         case SND_SOC_DAIFMT_NB_NF:
 437                 break;
 438         case SND_SOC_DAIFMT_IB_IF:
 439                 iface |= 0x0180;
 440                 break;
 441         case SND_SOC_DAIFMT_IB_NF:
 442                 iface |= 0x0100;
 443                 break;
 444         case SND_SOC_DAIFMT_NB_IF:
 445                 iface |= 0x0080;
 446                 break;
 447         default:
 448                 return -EINVAL;
 449         }
 450
 451         snd_soc_write(codec, WM8974_IFACE, iface);
 452         snd_soc_write(codec, WM8974_CLOCK, clk);
 453         return 0;
 454 }
 455
 456 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 457                                 struct snd_pcm_hw_params *params,
 458                                 struct snd_soc_dai *dai)
 459 {
 460         struct snd_soc_codec *codec = dai->codec;
 461         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 462         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 463
 464         /* bit size */
 465         switch (params_format(params)) {
 466         case SNDRV_PCM_FORMAT_S16_LE:
 467                 break;
 468         case SNDRV_PCM_FORMAT_S20_3LE:
 469                 iface |= 0x0020;
 470                 break;
 471         case SNDRV_PCM_FORMAT_S24_LE:
 472                 iface |= 0x0040;
 473                 break;
 474         case SNDRV_PCM_FORMAT_S32_LE:
 475                 iface |= 0x0060;
 476                 break;
 477         }
 478
 479         /* filter coefficient */
 480         switch (params_rate(params)) {
 481         case 8000:
 482                 adn |= 0x5 << 1;
 483                 break;
 484         case 11025:
 485                 adn |= 0x4 << 1;
 486                 break;
 487         case 16000:
 488                 adn |= 0x3 << 1;
 489                 break;
 490         case 22050:
 491                 adn |= 0x2 << 1;
 492                 break;
 493         case 32000:
 494                 adn |= 0x1 << 1;
 495                 break;
 496         case 44100:
 497         case 48000:
 498                 break;
 499         }
 500
 501         snd_soc_write(codec, WM8974_IFACE, iface);
 502         snd_soc_write(codec, WM8974_ADD, adn);
 503         return 0;
 504 }
 505
 506 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 507 {
 508         struct snd_soc_codec *codec = dai->codec;
 509         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 510
 511         if (mute)
 512                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 513         else
 514                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 515         return 0;
 516 }
 517
 518 /* liam need to make this lower power with dapm */
 519 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 520         enum snd_soc_bias_level level)
 521 {
 522         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 523
 524         switch (level) {
 525         case SND_SOC_BIAS_ON:
 526         case SND_SOC_BIAS_PREPARE:
 527                 power1 |= 0x1;  /* VMID 50k */
 528                 snd_soc_write(codec, WM8974_POWER1, power1);
 529                 break;
 530
 531         case SND_SOC_BIAS_STANDBY:
 532                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 533
 534                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 535                         /* Initial cap charge at VMID 5k */
 536                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 537                         mdelay(100);
 538                 }
 539
 540                 power1 |= 0x2;  /* VMID 500k */
 541                 snd_soc_write(codec, WM8974_POWER1, power1);
 542                 break;
 543
 544         case SND_SOC_BIAS_OFF:
 545                 snd_soc_write(codec, WM8974_POWER1, 0);
 546                 snd_soc_write(codec, WM8974_POWER2, 0);
 547                 snd_soc_write(codec, WM8974_POWER3, 0);
 548                 break;
 549         }
 550
 551         codec->dapm.bias_level = level;
 552         return 0;
 553 }
 554
 555 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 556
 557 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 558         SNDRV_PCM_FMTBIT_S24_LE)
 559
 560 static struct snd_soc_dai_ops wm8974_ops = {
 561         .hw_params = wm8974_pcm_hw_params,
 562         .digital_mute = wm8974_mute,
 563         .set_fmt = wm8974_set_dai_fmt,
 564         .set_clkdiv = wm8974_set_dai_clkdiv,
 565         .set_pll = wm8974_set_dai_pll,
 566 };
 567
 568 static struct snd_soc_dai_driver wm8974_dai = {
 569         .name = "wm8974-hifi",
 570         .playback = {
 571                 .stream_name = "Playback",
 572                 .channels_min = 1,
 573                 .channels_max = 2,   /* Only 1 channel of data */
 574                 .rates = WM8974_RATES,
 575                 .formats = WM8974_FORMATS,},
 576         .capture = {
 577                 .stream_name = "Capture",
 578                 .channels_min = 1,
 579                 .channels_max = 2,   /* Only 1 channel of data */
 580                 .rates = WM8974_RATES,
 581                 .formats = WM8974_FORMATS,},
 582         .ops = &wm8974_ops,
 583         .symmetric_rates = 1,
 584 };
 585
 586 static int wm8974_suspend(struct snd_soc_codec *codec, pm_message_t state)
 587 {
 588         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 589         return 0;
 590 }
 591
 592 static int wm8974_resume(struct snd_soc_codec *codec)
 593 {
 594         int i;
 595         u8 data[2];
 596         u16 *cache = codec->reg_cache;
 597
 598         /* Sync reg_cache with the hardware */
 599         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 600                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 601                 data[1] = cache[i] & 0x00ff;
 602                 codec->hw_write(codec->control_data, data, 2);
 603         }
 604         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 605
 606         return 0;
 607 }
 608
 609 static int wm8974_probe(struct snd_soc_codec *codec)
 610 {
 611         int ret = 0;
 612
 613         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 614         if (ret < 0) {
 615                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 616                 return ret;
 617         }
 618
 619         ret = wm8974_reset(codec);
 620         if (ret < 0) {
 621                 dev_err(codec->dev, "Failed to issue reset\n");
 622                 return ret;
 623         }
 624
 625         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 626         snd_soc_add_controls(codec, wm8974_snd_controls,
 627                              ARRAY_SIZE(wm8974_snd_controls));
 628         wm8974_add_widgets(codec);
 629
 630         return ret;
 631 }
 632
 633 /* power down chip */
 634 static int wm8974_remove(struct snd_soc_codec *codec)
 635 {
 636         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 637         return 0;
 638 }
 639
 640 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
 641         .probe =        wm8974_probe,
 642         .remove =       wm8974_remove,
 643         .suspend =      wm8974_suspend,
 644         .resume =       wm8974_resume,
 645         .set_bias_level = wm8974_set_bias_level,
 646         .reg_cache_size = ARRAY_SIZE(wm8974_reg),
 647         .reg_word_size = sizeof(u16),
 648         .reg_cache_default = wm8974_reg,
 649 };
 650
 651 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 652 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 653                                       const struct i2c_device_id *id)
 654 {
 655         struct wm8974_priv *wm8974;
 656         int ret;
 657
 658         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 659         if (wm8974 == NULL)
 660                 return -ENOMEM;
 661
 662         i2c_set_clientdata(i2c, wm8974);
 663
 664         ret = snd_soc_register_codec(&i2c->dev,
 665                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
 666         if (ret < 0)
 667                 kfree(wm8974);
 668         return ret;
 669 }
 670
 671 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 672 {
 673         snd_soc_unregister_codec(&client->dev);
 674         kfree(i2c_get_clientdata(client));
 675         return 0;
 676 }
 677
 678 static const struct i2c_device_id wm8974_i2c_id[] = {
 679         { "wm8974", 0 },
 680         { }
 681 };
 682 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 683
 684 static struct i2c_driver wm8974_i2c_driver = {
 685         .driver = {
 686                 .name = "wm8974-codec",
 687                 .owner = THIS_MODULE,
 688         },
 689         .probe =    wm8974_i2c_probe,
 690         .remove =   __devexit_p(wm8974_i2c_remove),
 691         .id_table = wm8974_i2c_id,
 692 };
 693 #endif
 694
 695 static int __init wm8974_modinit(void)
 696 {
 697         int ret = 0;
 698 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 699         ret = i2c_add_driver(&wm8974_i2c_driver);
 700         if (ret != 0) {
 701                 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n",
 702                        ret);
 703         }
 704 #endif
 705         return ret;
 706 }
 707 module_init(wm8974_modinit);
 708
 709 static void __exit wm8974_exit(void)
 710 {
 711 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 712         i2c_del_driver(&wm8974_i2c_driver);
 713 #endif
 714 }
 715 module_exit(wm8974_exit);
 716
 717 MODULE_DESCRIPTION("ASoC WM8974 driver");
 718 MODULE_AUTHOR("Liam Girdwood");
 719 MODULE_LICENSE("GPL");