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 <Liam.Girdwood@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/slab.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/initval.h>
  26 #include <sound/tlv.h>
  27
  28 #include "wm8974.h"
  29
  30 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
  31         0x0000, 0x0000, 0x0000, 0x0000,
  32         0x0050, 0x0000, 0x0140, 0x0000,
  33         0x0000, 0x0000, 0x0000, 0x00ff,
  34         0x0000, 0x0000, 0x0100, 0x00ff,
  35         0x0000, 0x0000, 0x012c, 0x002c,
  36         0x002c, 0x002c, 0x002c, 0x0000,
  37         0x0032, 0x0000, 0x0000, 0x0000,
  38         0x0000, 0x0000, 0x0000, 0x0000,
  39         0x0038, 0x000b, 0x0032, 0x0000,
  40         0x0008, 0x000c, 0x0093, 0x00e9,
  41         0x0000, 0x0000, 0x0000, 0x0000,
  42         0x0003, 0x0010, 0x0000, 0x0000,
  43         0x0000, 0x0002, 0x0000, 0x0000,
  44         0x0000, 0x0000, 0x0039, 0x0000,
  45         0x0000,
  46 };
  47
  48 #define WM8974_POWER1_BIASEN  0x08
  49 #define WM8974_POWER1_BUFIOEN 0x04
  50
  51 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  52
  53 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  54 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  55 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  56 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  57 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  58 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  59 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  60 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  61 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  62 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  63
  64 static const struct soc_enum wm8974_enum[] = {
  65         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  66         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  67         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  68         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  69
  70         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  71         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  72         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  73         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  74
  75         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  76         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  77         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  78         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  79
  80         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  81         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  82 };
  83
  84 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  85
  86 static const struct soc_enum wm8974_auxmode =
  87         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
  88
  89 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  90 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  91 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
  92 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
  93
  94 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
  95
  96 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
  97
  98 SOC_ENUM("DAC Companding", wm8974_enum[1]),
  99 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 100
 101 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 102 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 103
 104 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 105
 106 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 107 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 108 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 109
 110 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 111
 112 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 113 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 114 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 115
 116 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
 117 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 118 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 119
 120 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
 121 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 122 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 123
 124 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
 125 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 126 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 127
 128 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
 129 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 130 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 131
 132 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 133 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 134 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 135
 136 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 137 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 138
 139 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 140 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 141 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 142
 143 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 144 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 145 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 146
 147 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 148 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 149 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 150
 151 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 152 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 153
 154 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 155 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 156
 157 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 158 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 159 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 160
 161 SOC_ENUM("Aux Mode", wm8974_auxmode),
 162
 163 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 164 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 165
 166 /* DAC / ADC oversampling */
 167 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 168 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 169 };
 170
 171 /* Speaker Output Mixer */
 172 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 173 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 174 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 175 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 176 };
 177
 178 /* Mono Output Mixer */
 179 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 180 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 181 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 182 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 183 };
 184
 185 /* Boost mixer */
 186 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 187 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 188 };
 189
 190 /* Input PGA */
 191 static const struct snd_kcontrol_new wm8974_inpga[] = {
 192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 193 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 194 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 195 };
 196
 197 /* AUX Input boost vol */
 198 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 199 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 200
 201 /* Mic Input boost vol */
 202 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 203 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 204
 205 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 206 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 207         &wm8974_speaker_mixer_controls[0],
 208         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 209 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 210         &wm8974_mono_mixer_controls[0],
 211         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 212 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 213 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 214 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 215 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 216 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 217 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 218
 219 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 220                    ARRAY_SIZE(wm8974_inpga)),
 221 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 222                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 223
 224 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
 225
 226 SND_SOC_DAPM_INPUT("MICN"),
 227 SND_SOC_DAPM_INPUT("MICP"),
 228 SND_SOC_DAPM_INPUT("AUX"),
 229 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 230 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 231 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 232 };
 233
 234 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
 235         /* Mono output mixer */
 236         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 237         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 238         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 239
 240         /* Speaker output mixer */
 241         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 242         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 243         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 244
 245         /* Outputs */
 246         {"Mono Out", NULL, "Mono Mixer"},
 247         {"MONOOUT", NULL, "Mono Out"},
 248         {"SpkN Out", NULL, "Speaker Mixer"},
 249         {"SpkP Out", NULL, "Speaker Mixer"},
 250         {"SPKOUTN", NULL, "SpkN Out"},
 251         {"SPKOUTP", NULL, "SpkP Out"},
 252
 253         /* Boost Mixer */
 254         {"ADC", NULL, "Boost Mixer"},
 255         {"Boost Mixer", "Aux Switch", "Aux Input"},
 256         {"Boost Mixer", NULL, "Input PGA"},
 257         {"Boost Mixer", NULL, "MICP"},
 258
 259         /* Input PGA */
 260         {"Input PGA", "Aux Switch", "Aux Input"},
 261         {"Input PGA", "MicN Switch", "MICN"},
 262         {"Input PGA", "MicP Switch", "MICP"},
 263
 264         /* Inputs */
 265         {"Aux Input", NULL, "AUX"},
 266 };
 267
 268 struct pll_ {
 269         unsigned int pre_div:1;
 270         unsigned int n:4;
 271         unsigned int k;
 272 };
 273
 274 /* The size in bits of the pll divide multiplied by 10
 275  * to allow rounding later */
 276 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 277
 278 static void pll_factors(struct pll_ *pll_div,
 279                         unsigned int target, unsigned int source)
 280 {
 281         unsigned long long Kpart;
 282         unsigned int K, Ndiv, Nmod;
 283
 284         /* There is a fixed divide by 4 in the output path */
 285         target *= 4;
 286
 287         Ndiv = target / source;
 288         if (Ndiv < 6) {
 289                 source /= 2;
 290                 pll_div->pre_div = 1;
 291                 Ndiv = target / source;
 292         } else
 293                 pll_div->pre_div = 0;
 294
 295         if ((Ndiv < 6) || (Ndiv > 12))
 296                 printk(KERN_WARNING
 297                         "WM8974 N value %u outwith recommended range!\n",
 298                         Ndiv);
 299
 300         pll_div->n = Ndiv;
 301         Nmod = target % source;
 302         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 303
 304         do_div(Kpart, source);
 305
 306         K = Kpart & 0xFFFFFFFF;
 307
 308         /* Check if we need to round */
 309         if ((K % 10) >= 5)
 310                 K += 5;
 311
 312         /* Move down to proper range now rounding is done */
 313         K /= 10;
 314
 315         pll_div->k = K;
 316 }
 317
 318 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 319                 int source, unsigned int freq_in, unsigned int freq_out)
 320 {
 321         struct snd_soc_codec *codec = codec_dai->codec;
 322         struct pll_ pll_div;
 323         u16 reg;
 324
 325         if (freq_in == 0 || freq_out == 0) {
 326                 /* Clock CODEC directly from MCLK */
 327                 reg = snd_soc_read(codec, WM8974_CLOCK);
 328                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 329
 330                 /* Turn off PLL */
 331                 reg = snd_soc_read(codec, WM8974_POWER1);
 332                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 333                 return 0;
 334         }
 335
 336         pll_factors(&pll_div, freq_out, freq_in);
 337
 338         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 339         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 340         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 341         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 342         reg = snd_soc_read(codec, WM8974_POWER1);
 343         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 344
 345         /* Run CODEC from PLL instead of MCLK */
 346         reg = snd_soc_read(codec, WM8974_CLOCK);
 347         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 348
 349         return 0;
 350 }
 351
 352 /*
 353  * Configure WM8974 clock dividers.
 354  */
 355 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 356                 int div_id, int div)
 357 {
 358         struct snd_soc_codec *codec = codec_dai->codec;
 359         u16 reg;
 360
 361         switch (div_id) {
 362         case WM8974_OPCLKDIV:
 363                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 364                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 365                 break;
 366         case WM8974_MCLKDIV:
 367                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 368                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 369                 break;
 370         case WM8974_BCLKDIV:
 371                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 372                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 373                 break;
 374         default:
 375                 return -EINVAL;
 376         }
 377
 378         return 0;
 379 }
 380
 381 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 382                 unsigned int fmt)
 383 {
 384         struct snd_soc_codec *codec = codec_dai->codec;
 385         u16 iface = 0;
 386         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 387
 388         /* set master/slave audio interface */
 389         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 390         case SND_SOC_DAIFMT_CBM_CFM:
 391                 clk |= 0x0001;
 392                 break;
 393         case SND_SOC_DAIFMT_CBS_CFS:
 394                 break;
 395         default:
 396                 return -EINVAL;
 397         }
 398
 399         /* interface format */
 400         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 401         case SND_SOC_DAIFMT_I2S:
 402                 iface |= 0x0010;
 403                 break;
 404         case SND_SOC_DAIFMT_RIGHT_J:
 405                 break;
 406         case SND_SOC_DAIFMT_LEFT_J:
 407                 iface |= 0x0008;
 408                 break;
 409         case SND_SOC_DAIFMT_DSP_A:
 410                 iface |= 0x00018;
 411                 break;
 412         default:
 413                 return -EINVAL;
 414         }
 415
 416         /* clock inversion */
 417         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 418         case SND_SOC_DAIFMT_NB_NF:
 419                 break;
 420         case SND_SOC_DAIFMT_IB_IF:
 421                 iface |= 0x0180;
 422                 break;
 423         case SND_SOC_DAIFMT_IB_NF:
 424                 iface |= 0x0100;
 425                 break;
 426         case SND_SOC_DAIFMT_NB_IF:
 427                 iface |= 0x0080;
 428                 break;
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         snd_soc_write(codec, WM8974_IFACE, iface);
 434         snd_soc_write(codec, WM8974_CLOCK, clk);
 435         return 0;
 436 }
 437
 438 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 439                                 struct snd_pcm_hw_params *params,
 440                                 struct snd_soc_dai *dai)
 441 {
 442         struct snd_soc_codec *codec = dai->codec;
 443         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 444         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 445
 446         /* bit size */
 447         switch (params_format(params)) {
 448         case SNDRV_PCM_FORMAT_S16_LE:
 449                 break;
 450         case SNDRV_PCM_FORMAT_S20_3LE:
 451                 iface |= 0x0020;
 452                 break;
 453         case SNDRV_PCM_FORMAT_S24_LE:
 454                 iface |= 0x0040;
 455                 break;
 456         case SNDRV_PCM_FORMAT_S32_LE:
 457                 iface |= 0x0060;
 458                 break;
 459         }
 460
 461         /* filter coefficient */
 462         switch (params_rate(params)) {
 463         case 8000:
 464                 adn |= 0x5 << 1;
 465                 break;
 466         case 11025:
 467                 adn |= 0x4 << 1;
 468                 break;
 469         case 16000:
 470                 adn |= 0x3 << 1;
 471                 break;
 472         case 22050:
 473                 adn |= 0x2 << 1;
 474                 break;
 475         case 32000:
 476                 adn |= 0x1 << 1;
 477                 break;
 478         case 44100:
 479         case 48000:
 480                 break;
 481         }
 482
 483         snd_soc_write(codec, WM8974_IFACE, iface);
 484         snd_soc_write(codec, WM8974_ADD, adn);
 485         return 0;
 486 }
 487
 488 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 489 {
 490         struct snd_soc_codec *codec = dai->codec;
 491         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 492
 493         if (mute)
 494                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 495         else
 496                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 497         return 0;
 498 }
 499
 500 /* liam need to make this lower power with dapm */
 501 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 502         enum snd_soc_bias_level level)
 503 {
 504         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 505
 506         switch (level) {
 507         case SND_SOC_BIAS_ON:
 508         case SND_SOC_BIAS_PREPARE:
 509                 power1 |= 0x1;  /* VMID 50k */
 510                 snd_soc_write(codec, WM8974_POWER1, power1);
 511                 break;
 512
 513         case SND_SOC_BIAS_STANDBY:
 514                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 515
 516                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 517                         snd_soc_cache_sync(codec);
 518
 519                         /* Initial cap charge at VMID 5k */
 520                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 521                         mdelay(100);
 522                 }
 523
 524                 power1 |= 0x2;  /* VMID 500k */
 525                 snd_soc_write(codec, WM8974_POWER1, power1);
 526                 break;
 527
 528         case SND_SOC_BIAS_OFF:
 529                 snd_soc_write(codec, WM8974_POWER1, 0);
 530                 snd_soc_write(codec, WM8974_POWER2, 0);
 531                 snd_soc_write(codec, WM8974_POWER3, 0);
 532                 break;
 533         }
 534
 535         codec->dapm.bias_level = level;
 536         return 0;
 537 }
 538
 539 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 540
 541 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 542         SNDRV_PCM_FMTBIT_S24_LE)
 543
 544 static const struct snd_soc_dai_ops wm8974_ops = {
 545         .hw_params = wm8974_pcm_hw_params,
 546         .digital_mute = wm8974_mute,
 547         .set_fmt = wm8974_set_dai_fmt,
 548         .set_clkdiv = wm8974_set_dai_clkdiv,
 549         .set_pll = wm8974_set_dai_pll,
 550 };
 551
 552 static struct snd_soc_dai_driver wm8974_dai = {
 553         .name = "wm8974-hifi",
 554         .playback = {
 555                 .stream_name = "Playback",
 556                 .channels_min = 1,
 557                 .channels_max = 2,   /* Only 1 channel of data */
 558                 .rates = WM8974_RATES,
 559                 .formats = WM8974_FORMATS,},
 560         .capture = {
 561                 .stream_name = "Capture",
 562                 .channels_min = 1,
 563                 .channels_max = 2,   /* Only 1 channel of data */
 564                 .rates = WM8974_RATES,
 565                 .formats = WM8974_FORMATS,},
 566         .ops = &wm8974_ops,
 567         .symmetric_rates = 1,
 568 };
 569
 570 static int wm8974_suspend(struct snd_soc_codec *codec)
 571 {
 572         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 573         return 0;
 574 }
 575
 576 static int wm8974_resume(struct snd_soc_codec *codec)
 577 {
 578         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 579         return 0;
 580 }
 581
 582 static int wm8974_probe(struct snd_soc_codec *codec)
 583 {
 584         int ret = 0;
 585
 586         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 587         if (ret < 0) {
 588                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 589                 return ret;
 590         }
 591
 592         ret = wm8974_reset(codec);
 593         if (ret < 0) {
 594                 dev_err(codec->dev, "Failed to issue reset\n");
 595                 return ret;
 596         }
 597
 598         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 599
 600         return ret;
 601 }
 602
 603 /* power down chip */
 604 static int wm8974_remove(struct snd_soc_codec *codec)
 605 {
 606         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 607         return 0;
 608 }
 609
 610 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
 611         .probe =        wm8974_probe,
 612         .remove =       wm8974_remove,
 613         .suspend =      wm8974_suspend,
 614         .resume =       wm8974_resume,
 615         .set_bias_level = wm8974_set_bias_level,
 616         .reg_cache_size = ARRAY_SIZE(wm8974_reg),
 617         .reg_word_size = sizeof(u16),
 618         .reg_cache_default = wm8974_reg,
 619
 620         .controls = wm8974_snd_controls,
 621         .num_controls = ARRAY_SIZE(wm8974_snd_controls),
 622         .dapm_widgets = wm8974_dapm_widgets,
 623         .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
 624         .dapm_routes = wm8974_dapm_routes,
 625         .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
 626 };
 627
 628 static int wm8974_i2c_probe(struct i2c_client *i2c,
 629                             const struct i2c_device_id *id)
 630 {
 631         int ret;
 632
 633         ret = snd_soc_register_codec(&i2c->dev,
 634                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
 635
 636         return ret;
 637 }
 638
 639 static int wm8974_i2c_remove(struct i2c_client *client)
 640 {
 641         snd_soc_unregister_codec(&client->dev);
 642
 643         return 0;
 644 }
 645
 646 static const struct i2c_device_id wm8974_i2c_id[] = {
 647         { "wm8974", 0 },
 648         { }
 649 };
 650 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 651
 652 static struct i2c_driver wm8974_i2c_driver = {
 653         .driver = {
 654                 .name = "wm8974",
 655                 .owner = THIS_MODULE,
 656         },
 657         .probe =    wm8974_i2c_probe,
 658         .remove =   wm8974_i2c_remove,
 659         .id_table = wm8974_i2c_id,
 660 };
 661
 662 module_i2c_driver(wm8974_i2c_driver);
 663
 664 MODULE_DESCRIPTION("ASoC WM8974 driver");
 665 MODULE_AUTHOR("Liam Girdwood");
 666 MODULE_LICENSE("GPL");