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