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         struct snd_soc_codec codec;
  55         u16 reg_cache[WM8974_CACHEREGNUM];
  56 };
  57
  58 static struct snd_soc_codec *wm8974_codec;
  59
  60 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  61
  62 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  63 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  64 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  65 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  66 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  67 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  68 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  69 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  70 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  71 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  72
  73 static const struct soc_enum wm8974_enum[] = {
  74         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  75         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  76         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  77         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  78
  79         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  80         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  81         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  82         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  83
  84         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  85         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  86         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  87         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  88
  89         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  90         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  91 };
  92
  93 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  94
  95 static const struct soc_enum wm8974_auxmode =
  96         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
  97
  98 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  99 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
 100 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 101 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 102
 103 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 104
 105 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 106
 107 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 108 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 109
 110 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 111 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 112
 113 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 114
 115 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 116 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 117 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 118
 119 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 120
 121 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 122 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 123 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 124
 125 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 126 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 127 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 128
 129 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 130 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 131 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 132
 133 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 134 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 135 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 136
 137 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 138 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 139 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 140
 141 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 142 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 143 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 144
 145 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 146 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 147
 148 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 149 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 150 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 151
 152 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 153 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 154 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 155
 156 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 157 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 158 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 159
 160 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 161 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 162
 163 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 164 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 165
 166 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 167 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 168 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 169
 170 SOC_ENUM("Aux Mode", wm8974_auxmode),
 171
 172 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 173 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 174
 175 /* DAC / ADC oversampling */
 176 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 177 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 178 };
 179
 180 /* Speaker Output Mixer */
 181 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 182 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 183 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 184 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 185 };
 186
 187 /* Mono Output Mixer */
 188 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 189 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 190 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 191 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 192 };
 193
 194 /* Boost mixer */
 195 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 196 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 197 };
 198
 199 /* Input PGA */
 200 static const struct snd_kcontrol_new wm8974_inpga[] = {
 201 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 202 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 203 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 204 };
 205
 206 /* AUX Input boost vol */
 207 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 208 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 209
 210 /* Mic Input boost vol */
 211 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 212 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 213
 214 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 215 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 216         &wm8974_speaker_mixer_controls[0],
 217         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 218 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 219         &wm8974_mono_mixer_controls[0],
 220         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 221 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 222 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 223 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 224 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 225 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 226 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 227
 228 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 229                    ARRAY_SIZE(wm8974_inpga)),
 230 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 231                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 232
 233 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 234
 235 SND_SOC_DAPM_INPUT("MICN"),
 236 SND_SOC_DAPM_INPUT("MICP"),
 237 SND_SOC_DAPM_INPUT("AUX"),
 238 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 239 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 240 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 241 };
 242
 243 static const struct snd_soc_dapm_route audio_map[] = {
 244         /* Mono output mixer */
 245         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 246         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 247         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 248
 249         /* Speaker output mixer */
 250         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 251         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 252         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 253
 254         /* Outputs */
 255         {"Mono Out", NULL, "Mono Mixer"},
 256         {"MONOOUT", NULL, "Mono Out"},
 257         {"SpkN Out", NULL, "Speaker Mixer"},
 258         {"SpkP Out", NULL, "Speaker Mixer"},
 259         {"SPKOUTN", NULL, "SpkN Out"},
 260         {"SPKOUTP", NULL, "SpkP Out"},
 261
 262         /* Boost Mixer */
 263         {"ADC", NULL, "Boost Mixer"},
 264         {"Boost Mixer", "Aux Switch", "Aux Input"},
 265         {"Boost Mixer", NULL, "Input PGA"},
 266         {"Boost Mixer", NULL, "MICP"},
 267
 268         /* Input PGA */
 269         {"Input PGA", "Aux Switch", "Aux Input"},
 270         {"Input PGA", "MicN Switch", "MICN"},
 271         {"Input PGA", "MicP Switch", "MICP"},
 272
 273         /* Inputs */
 274         {"Aux Input", NULL, "AUX"},
 275 };
 276
 277 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 278 {
 279         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
 280                                   ARRAY_SIZE(wm8974_dapm_widgets));
 281
 282         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 283
 284         return 0;
 285 }
 286
 287 struct pll_ {
 288         unsigned int pre_div:1;
 289         unsigned int n:4;
 290         unsigned int k;
 291 };
 292
 293 /* The size in bits of the pll divide multiplied by 10
 294  * to allow rounding later */
 295 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 296
 297 static void pll_factors(struct pll_ *pll_div,
 298                         unsigned int target, unsigned int source)
 299 {
 300         unsigned long long Kpart;
 301         unsigned int K, Ndiv, Nmod;
 302
 303         /* There is a fixed divide by 4 in the output path */
 304         target *= 4;
 305
 306         Ndiv = target / source;
 307         if (Ndiv < 6) {
 308                 source /= 2;
 309                 pll_div->pre_div = 1;
 310                 Ndiv = target / source;
 311         } else
 312                 pll_div->pre_div = 0;
 313
 314         if ((Ndiv < 6) || (Ndiv > 12))
 315                 printk(KERN_WARNING
 316                         "WM8974 N value %u outwith recommended range!\n",
 317                         Ndiv);
 318
 319         pll_div->n = Ndiv;
 320         Nmod = target % source;
 321         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 322
 323         do_div(Kpart, source);
 324
 325         K = Kpart & 0xFFFFFFFF;
 326
 327         /* Check if we need to round */
 328         if ((K % 10) >= 5)
 329                 K += 5;
 330
 331         /* Move down to proper range now rounding is done */
 332         K /= 10;
 333
 334         pll_div->k = K;
 335 }
 336
 337 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 338                 int source, unsigned int freq_in, unsigned int freq_out)
 339 {
 340         struct snd_soc_codec *codec = codec_dai->codec;
 341         struct pll_ pll_div;
 342         u16 reg;
 343
 344         if (freq_in == 0 || freq_out == 0) {
 345                 /* Clock CODEC directly from MCLK */
 346                 reg = snd_soc_read(codec, WM8974_CLOCK);
 347                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 348
 349                 /* Turn off PLL */
 350                 reg = snd_soc_read(codec, WM8974_POWER1);
 351                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 352                 return 0;
 353         }
 354
 355         pll_factors(&pll_div, freq_out, freq_in);
 356
 357         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 358         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 359         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 360         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 361         reg = snd_soc_read(codec, WM8974_POWER1);
 362         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 363
 364         /* Run CODEC from PLL instead of MCLK */
 365         reg = snd_soc_read(codec, WM8974_CLOCK);
 366         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 367
 368         return 0;
 369 }
 370
 371 /*
 372  * Configure WM8974 clock dividers.
 373  */
 374 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 375                 int div_id, int div)
 376 {
 377         struct snd_soc_codec *codec = codec_dai->codec;
 378         u16 reg;
 379
 380         switch (div_id) {
 381         case WM8974_OPCLKDIV:
 382                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 383                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 384                 break;
 385         case WM8974_MCLKDIV:
 386                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 387                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 388                 break;
 389         case WM8974_BCLKDIV:
 390                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 391                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 392                 break;
 393         default:
 394                 return -EINVAL;
 395         }
 396
 397         return 0;
 398 }
 399
 400 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 401                 unsigned int fmt)
 402 {
 403         struct snd_soc_codec *codec = codec_dai->codec;
 404         u16 iface = 0;
 405         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 406
 407         /* set master/slave audio interface */
 408         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 409         case SND_SOC_DAIFMT_CBM_CFM:
 410                 clk |= 0x0001;
 411                 break;
 412         case SND_SOC_DAIFMT_CBS_CFS:
 413                 break;
 414         default:
 415                 return -EINVAL;
 416         }
 417
 418         /* interface format */
 419         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 420         case SND_SOC_DAIFMT_I2S:
 421                 iface |= 0x0010;
 422                 break;
 423         case SND_SOC_DAIFMT_RIGHT_J:
 424                 break;
 425         case SND_SOC_DAIFMT_LEFT_J:
 426                 iface |= 0x0008;
 427                 break;
 428         case SND_SOC_DAIFMT_DSP_A:
 429                 iface |= 0x00018;
 430                 break;
 431         default:
 432                 return -EINVAL;
 433         }
 434
 435         /* clock inversion */
 436         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 437         case SND_SOC_DAIFMT_NB_NF:
 438                 break;
 439         case SND_SOC_DAIFMT_IB_IF:
 440                 iface |= 0x0180;
 441                 break;
 442         case SND_SOC_DAIFMT_IB_NF:
 443                 iface |= 0x0100;
 444                 break;
 445         case SND_SOC_DAIFMT_NB_IF:
 446                 iface |= 0x0080;
 447                 break;
 448         default:
 449                 return -EINVAL;
 450         }
 451
 452         snd_soc_write(codec, WM8974_IFACE, iface);
 453         snd_soc_write(codec, WM8974_CLOCK, clk);
 454         return 0;
 455 }
 456
 457 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 458                                 struct snd_pcm_hw_params *params,
 459                                 struct snd_soc_dai *dai)
 460 {
 461         struct snd_soc_codec *codec = dai->codec;
 462         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 463         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 464
 465         /* bit size */
 466         switch (params_format(params)) {
 467         case SNDRV_PCM_FORMAT_S16_LE:
 468                 break;
 469         case SNDRV_PCM_FORMAT_S20_3LE:
 470                 iface |= 0x0020;
 471                 break;
 472         case SNDRV_PCM_FORMAT_S24_LE:
 473                 iface |= 0x0040;
 474                 break;
 475         case SNDRV_PCM_FORMAT_S32_LE:
 476                 iface |= 0x0060;
 477                 break;
 478         }
 479
 480         /* filter coefficient */
 481         switch (params_rate(params)) {
 482         case 8000:
 483                 adn |= 0x5 << 1;
 484                 break;
 485         case 11025:
 486                 adn |= 0x4 << 1;
 487                 break;
 488         case 16000:
 489                 adn |= 0x3 << 1;
 490                 break;
 491         case 22050:
 492                 adn |= 0x2 << 1;
 493                 break;
 494         case 32000:
 495                 adn |= 0x1 << 1;
 496                 break;
 497         case 44100:
 498         case 48000:
 499                 break;
 500         }
 501
 502         snd_soc_write(codec, WM8974_IFACE, iface);
 503         snd_soc_write(codec, WM8974_ADD, adn);
 504         return 0;
 505 }
 506
 507 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 508 {
 509         struct snd_soc_codec *codec = dai->codec;
 510         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 511
 512         if (mute)
 513                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 514         else
 515                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 516         return 0;
 517 }
 518
 519 /* liam need to make this lower power with dapm */
 520 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 521         enum snd_soc_bias_level level)
 522 {
 523         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 524
 525         switch (level) {
 526         case SND_SOC_BIAS_ON:
 527         case SND_SOC_BIAS_PREPARE:
 528                 power1 |= 0x1;  /* VMID 50k */
 529                 snd_soc_write(codec, WM8974_POWER1, power1);
 530                 break;
 531
 532         case SND_SOC_BIAS_STANDBY:
 533                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 534
 535                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 536                         /* Initial cap charge at VMID 5k */
 537                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 538                         mdelay(100);
 539                 }
 540
 541                 power1 |= 0x2;  /* VMID 500k */
 542                 snd_soc_write(codec, WM8974_POWER1, power1);
 543                 break;
 544
 545         case SND_SOC_BIAS_OFF:
 546                 snd_soc_write(codec, WM8974_POWER1, 0);
 547                 snd_soc_write(codec, WM8974_POWER2, 0);
 548                 snd_soc_write(codec, WM8974_POWER3, 0);
 549                 break;
 550         }
 551
 552         codec->bias_level = level;
 553         return 0;
 554 }
 555
 556 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 557
 558 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 559         SNDRV_PCM_FMTBIT_S24_LE)
 560
 561 static struct snd_soc_dai_ops wm8974_ops = {
 562         .hw_params = wm8974_pcm_hw_params,
 563         .digital_mute = wm8974_mute,
 564         .set_fmt = wm8974_set_dai_fmt,
 565         .set_clkdiv = wm8974_set_dai_clkdiv,
 566         .set_pll = wm8974_set_dai_pll,
 567 };
 568
 569 struct snd_soc_dai wm8974_dai = {
 570         .name = "WM8974 HiFi",
 571         .playback = {
 572                 .stream_name = "Playback",
 573                 .channels_min = 1,
 574                 .channels_max = 2,   /* Only 1 channel of data */
 575                 .rates = WM8974_RATES,
 576                 .formats = WM8974_FORMATS,},
 577         .capture = {
 578                 .stream_name = "Capture",
 579                 .channels_min = 1,
 580                 .channels_max = 2,   /* Only 1 channel of data */
 581                 .rates = WM8974_RATES,
 582                 .formats = WM8974_FORMATS,},
 583         .ops = &wm8974_ops,
 584         .symmetric_rates = 1,
 585 };
 586 EXPORT_SYMBOL_GPL(wm8974_dai);
 587
 588 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
 589 {
 590         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 591         struct snd_soc_codec *codec = socdev->card->codec;
 592
 593         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 594         return 0;
 595 }
 596
 597 static int wm8974_resume(struct platform_device *pdev)
 598 {
 599         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 600         struct snd_soc_codec *codec = socdev->card->codec;
 601         int i;
 602         u8 data[2];
 603         u16 *cache = codec->reg_cache;
 604
 605         /* Sync reg_cache with the hardware */
 606         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 607                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 608                 data[1] = cache[i] & 0x00ff;
 609                 codec->hw_write(codec->control_data, data, 2);
 610         }
 611         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 612
 613         return 0;
 614 }
 615
 616 static int wm8974_probe(struct platform_device *pdev)
 617 {
 618         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 619         struct snd_soc_codec *codec;
 620         int ret = 0;
 621
 622         if (wm8974_codec == NULL) {
 623                 dev_err(&pdev->dev, "Codec device not registered\n");
 624                 return -ENODEV;
 625         }
 626
 627         socdev->card->codec = wm8974_codec;
 628         codec = wm8974_codec;
 629
 630         /* register pcms */
 631         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 632         if (ret < 0) {
 633                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 634                 goto pcm_err;
 635         }
 636
 637         snd_soc_add_controls(codec, wm8974_snd_controls,
 638                              ARRAY_SIZE(wm8974_snd_controls));
 639         wm8974_add_widgets(codec);
 640
 641         return ret;
 642
 643 pcm_err:
 644         return ret;
 645 }
 646
 647 /* power down chip */
 648 static int wm8974_remove(struct platform_device *pdev)
 649 {
 650         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 651
 652         snd_soc_free_pcms(socdev);
 653         snd_soc_dapm_free(socdev);
 654
 655         return 0;
 656 }
 657
 658 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
 659         .probe =        wm8974_probe,
 660         .remove =       wm8974_remove,
 661         .suspend =      wm8974_suspend,
 662         .resume =       wm8974_resume,
 663 };
 664 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
 665
 666 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
 667 {
 668         int ret;
 669         struct snd_soc_codec *codec = &wm8974->codec;
 670
 671         if (wm8974_codec) {
 672                 dev_err(codec->dev, "Another WM8974 is registered\n");
 673                 return -EINVAL;
 674         }
 675
 676         mutex_init(&codec->mutex);
 677         INIT_LIST_HEAD(&codec->dapm_widgets);
 678         INIT_LIST_HEAD(&codec->dapm_paths);
 679
 680         snd_soc_codec_set_drvdata(codec, wm8974);
 681         codec->name = "WM8974";
 682         codec->owner = THIS_MODULE;
 683         codec->bias_level = SND_SOC_BIAS_OFF;
 684         codec->set_bias_level = wm8974_set_bias_level;
 685         codec->dai = &wm8974_dai;
 686         codec->num_dai = 1;
 687         codec->reg_cache_size = WM8974_CACHEREGNUM;
 688         codec->reg_cache = &wm8974->reg_cache;
 689
 690         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 691         if (ret < 0) {
 692                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 693                 goto err;
 694         }
 695
 696         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 697
 698         ret = wm8974_reset(codec);
 699         if (ret < 0) {
 700                 dev_err(codec->dev, "Failed to issue reset\n");
 701                 goto err;
 702         }
 703
 704         wm8974_dai.dev = codec->dev;
 705
 706         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 707
 708         wm8974_codec = codec;
 709
 710         ret = snd_soc_register_codec(codec);
 711         if (ret != 0) {
 712                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 713                 goto err;
 714         }
 715
 716         ret = snd_soc_register_dai(&wm8974_dai);
 717         if (ret != 0) {
 718                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 719                 goto err_codec;
 720         }
 721
 722         return 0;
 723
 724 err_codec:
 725         snd_soc_unregister_codec(codec);
 726 err:
 727         kfree(wm8974);
 728         return ret;
 729 }
 730
 731 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
 732 {
 733         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
 734         snd_soc_unregister_dai(&wm8974_dai);
 735         snd_soc_unregister_codec(&wm8974->codec);
 736         kfree(wm8974);
 737         wm8974_codec = NULL;
 738 }
 739
 740 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 741                                       const struct i2c_device_id *id)
 742 {
 743         struct wm8974_priv *wm8974;
 744         struct snd_soc_codec *codec;
 745
 746         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 747         if (wm8974 == NULL)
 748                 return -ENOMEM;
 749
 750         codec = &wm8974->codec;
 751         codec->hw_write = (hw_write_t)i2c_master_send;
 752
 753         i2c_set_clientdata(i2c, wm8974);
 754         codec->control_data = i2c;
 755
 756         codec->dev = &i2c->dev;
 757
 758         return wm8974_register(wm8974);
 759 }
 760
 761 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 762 {
 763         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
 764         wm8974_unregister(wm8974);
 765         return 0;
 766 }
 767
 768 static const struct i2c_device_id wm8974_i2c_id[] = {
 769         { "wm8974", 0 },
 770         { }
 771 };
 772 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 773
 774 static struct i2c_driver wm8974_i2c_driver = {
 775         .driver = {
 776                 .name = "WM8974",
 777                 .owner = THIS_MODULE,
 778         },
 779         .probe =    wm8974_i2c_probe,
 780         .remove =   __devexit_p(wm8974_i2c_remove),
 781         .id_table = wm8974_i2c_id,
 782 };
 783
 784 static int __init wm8974_modinit(void)
 785 {
 786         return i2c_add_driver(&wm8974_i2c_driver);
 787 }
 788 module_init(wm8974_modinit);
 789
 790 static void __exit wm8974_exit(void)
 791 {
 792         i2c_del_driver(&wm8974_i2c_driver);
 793 }
 794 module_exit(wm8974_exit);
 795
 796 MODULE_DESCRIPTION("ASoC WM8974 driver");
 797 MODULE_AUTHOR("Liam Girdwood");
 798 MODULE_LICENSE("GPL");