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 <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/soc-dapm.h>
  26 #include <sound/initval.h>
  27 #include <sound/tlv.h>
  28
  29 #include "wm8974.h"
  30
  31 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
  32         0x0000, 0x0000, 0x0000, 0x0000,
  33         0x0050, 0x0000, 0x0140, 0x0000,
  34         0x0000, 0x0000, 0x0000, 0x00ff,
  35         0x0000, 0x0000, 0x0100, 0x00ff,
  36         0x0000, 0x0000, 0x012c, 0x002c,
  37         0x002c, 0x002c, 0x002c, 0x0000,
  38         0x0032, 0x0000, 0x0000, 0x0000,
  39         0x0000, 0x0000, 0x0000, 0x0000,
  40         0x0038, 0x000b, 0x0032, 0x0000,
  41         0x0008, 0x000c, 0x0093, 0x00e9,
  42         0x0000, 0x0000, 0x0000, 0x0000,
  43         0x0003, 0x0010, 0x0000, 0x0000,
  44         0x0000, 0x0002, 0x0000, 0x0000,
  45         0x0000, 0x0000, 0x0039, 0x0000,
  46         0x0000,
  47 };
  48
  49 #define WM8974_POWER1_BIASEN  0x08
  50 #define WM8974_POWER1_BUFIOEN 0x10
  51
  52 struct wm8974_priv {
  53         struct snd_soc_codec codec;
  54         u16 reg_cache[WM8974_CACHEREGNUM];
  55 };
  56
  57 static struct snd_soc_codec *wm8974_codec;
  58
  59 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  60
  61 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  62 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  63 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  64 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  65 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  66 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  67 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  68 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  69 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  70 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  71
  72 static const struct soc_enum wm8974_enum[] = {
  73         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  74         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  75         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  76         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  77
  78         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  79         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  80         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  81         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  82
  83         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  84         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  85         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  86         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  87
  88         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  89         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  90 };
  91
  92 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  93
  94 static const struct soc_enum wm8974_auxmode =
  95         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
  96
  97 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  98 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  99 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 100 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 101
 102 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 103
 104 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 105
 106 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 107 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 108
 109 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 110 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 111
 112 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 113
 114 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 115 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 116 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 117
 118 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 119
 120 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 121 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 122 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 123
 124 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 125 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 126 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 127
 128 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 129 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 130 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 131
 132 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 133 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 134 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 135
 136 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 137 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 138 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 139
 140 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 141 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 142 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 143
 144 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 145 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 146
 147 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 148 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 149 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 150
 151 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 152 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 153 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 154
 155 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 156 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 157 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 158
 159 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 161
 162 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 163 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 164
 165 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 166 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 167 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 168
 169 SOC_ENUM("Aux Mode", wm8974_auxmode),
 170
 171 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 172 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 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, 1),
 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_MICBIAS("Mic Bias", WM8974_POWER1, 4, 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         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
 275                                   ARRAY_SIZE(wm8974_dapm_widgets));
 276
 277         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 278
 279         return 0;
 280 }
 281
 282 struct pll_ {
 283         unsigned int pre_div:1;
 284         unsigned int n:4;
 285         unsigned int k;
 286 };
 287
 288 /* The size in bits of the pll divide multiplied by 10
 289  * to allow rounding later */
 290 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 291
 292 static void pll_factors(struct pll_ *pll_div,
 293                         unsigned int target, unsigned int source)
 294 {
 295         unsigned long long Kpart;
 296         unsigned int K, Ndiv, Nmod;
 297
 298         /* There is a fixed divide by 4 in the output path */
 299         target *= 4;
 300
 301         Ndiv = target / source;
 302         if (Ndiv < 6) {
 303                 source /= 2;
 304                 pll_div->pre_div = 1;
 305                 Ndiv = target / source;
 306         } else
 307                 pll_div->pre_div = 0;
 308
 309         if ((Ndiv < 6) || (Ndiv > 12))
 310                 printk(KERN_WARNING
 311                         "WM8974 N value %u outwith recommended range!\n",
 312                         Ndiv);
 313
 314         pll_div->n = Ndiv;
 315         Nmod = target % source;
 316         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 317
 318         do_div(Kpart, source);
 319
 320         K = Kpart & 0xFFFFFFFF;
 321
 322         /* Check if we need to round */
 323         if ((K % 10) >= 5)
 324                 K += 5;
 325
 326         /* Move down to proper range now rounding is done */
 327         K /= 10;
 328
 329         pll_div->k = K;
 330 }
 331
 332 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 333                 int source, unsigned int freq_in, unsigned int freq_out)
 334 {
 335         struct snd_soc_codec *codec = codec_dai->codec;
 336         struct pll_ pll_div;
 337         u16 reg;
 338
 339         if (freq_in == 0 || freq_out == 0) {
 340                 /* Clock CODEC directly from MCLK */
 341                 reg = snd_soc_read(codec, WM8974_CLOCK);
 342                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 343
 344                 /* Turn off PLL */
 345                 reg = snd_soc_read(codec, WM8974_POWER1);
 346                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 347                 return 0;
 348         }
 349
 350         pll_factors(&pll_div, freq_out, freq_in);
 351
 352         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 353         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 354         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 355         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 356         reg = snd_soc_read(codec, WM8974_POWER1);
 357         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 358
 359         /* Run CODEC from PLL instead of MCLK */
 360         reg = snd_soc_read(codec, WM8974_CLOCK);
 361         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 362
 363         return 0;
 364 }
 365
 366 /*
 367  * Configure WM8974 clock dividers.
 368  */
 369 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 370                 int div_id, int div)
 371 {
 372         struct snd_soc_codec *codec = codec_dai->codec;
 373         u16 reg;
 374
 375         switch (div_id) {
 376         case WM8974_OPCLKDIV:
 377                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 378                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 379                 break;
 380         case WM8974_MCLKDIV:
 381                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 382                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 383                 break;
 384         case WM8974_ADCCLK:
 385                 reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7;
 386                 snd_soc_write(codec, WM8974_ADC, reg | div);
 387                 break;
 388         case WM8974_DACCLK:
 389                 reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7;
 390                 snd_soc_write(codec, WM8974_DAC, reg | div);
 391                 break;
 392         case WM8974_BCLKDIV:
 393                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 394                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 395                 break;
 396         default:
 397                 return -EINVAL;
 398         }
 399
 400         return 0;
 401 }
 402
 403 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 404                 unsigned int fmt)
 405 {
 406         struct snd_soc_codec *codec = codec_dai->codec;
 407         u16 iface = 0;
 408         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 409
 410         /* set master/slave audio interface */
 411         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 412         case SND_SOC_DAIFMT_CBM_CFM:
 413                 clk |= 0x0001;
 414                 break;
 415         case SND_SOC_DAIFMT_CBS_CFS:
 416                 break;
 417         default:
 418                 return -EINVAL;
 419         }
 420
 421         /* interface format */
 422         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 423         case SND_SOC_DAIFMT_I2S:
 424                 iface |= 0x0010;
 425                 break;
 426         case SND_SOC_DAIFMT_RIGHT_J:
 427                 break;
 428         case SND_SOC_DAIFMT_LEFT_J:
 429                 iface |= 0x0008;
 430                 break;
 431         case SND_SOC_DAIFMT_DSP_A:
 432                 iface |= 0x00018;
 433                 break;
 434         default:
 435                 return -EINVAL;
 436         }
 437
 438         /* clock inversion */
 439         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 440         case SND_SOC_DAIFMT_NB_NF:
 441                 break;
 442         case SND_SOC_DAIFMT_IB_IF:
 443                 iface |= 0x0180;
 444                 break;
 445         case SND_SOC_DAIFMT_IB_NF:
 446                 iface |= 0x0100;
 447                 break;
 448         case SND_SOC_DAIFMT_NB_IF:
 449                 iface |= 0x0080;
 450                 break;
 451         default:
 452                 return -EINVAL;
 453         }
 454
 455         snd_soc_write(codec, WM8974_IFACE, iface);
 456         snd_soc_write(codec, WM8974_CLOCK, clk);
 457         return 0;
 458 }
 459
 460 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 461                                 struct snd_pcm_hw_params *params,
 462                                 struct snd_soc_dai *dai)
 463 {
 464         struct snd_soc_codec *codec = dai->codec;
 465         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 466         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 467
 468         /* bit size */
 469         switch (params_format(params)) {
 470         case SNDRV_PCM_FORMAT_S16_LE:
 471                 break;
 472         case SNDRV_PCM_FORMAT_S20_3LE:
 473                 iface |= 0x0020;
 474                 break;
 475         case SNDRV_PCM_FORMAT_S24_LE:
 476                 iface |= 0x0040;
 477                 break;
 478         case SNDRV_PCM_FORMAT_S32_LE:
 479                 iface |= 0x0060;
 480                 break;
 481         }
 482
 483         /* filter coefficient */
 484         switch (params_rate(params)) {
 485         case SNDRV_PCM_RATE_8000:
 486                 adn |= 0x5 << 1;
 487                 break;
 488         case SNDRV_PCM_RATE_11025:
 489                 adn |= 0x4 << 1;
 490                 break;
 491         case SNDRV_PCM_RATE_16000:
 492                 adn |= 0x3 << 1;
 493                 break;
 494         case SNDRV_PCM_RATE_22050:
 495                 adn |= 0x2 << 1;
 496                 break;
 497         case SNDRV_PCM_RATE_32000:
 498                 adn |= 0x1 << 1;
 499                 break;
 500         case SNDRV_PCM_RATE_44100:
 501         case SNDRV_PCM_RATE_48000:
 502                 break;
 503         }
 504
 505         snd_soc_write(codec, WM8974_IFACE, iface);
 506         snd_soc_write(codec, WM8974_ADD, adn);
 507         return 0;
 508 }
 509
 510 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 511 {
 512         struct snd_soc_codec *codec = dai->codec;
 513         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 514
 515         if (mute)
 516                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 517         else
 518                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 519         return 0;
 520 }
 521
 522 /* liam need to make this lower power with dapm */
 523 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 524         enum snd_soc_bias_level level)
 525 {
 526         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 527
 528         switch (level) {
 529         case SND_SOC_BIAS_ON:
 530         case SND_SOC_BIAS_PREPARE:
 531                 power1 |= 0x1;  /* VMID 50k */
 532                 snd_soc_write(codec, WM8974_POWER1, power1);
 533                 break;
 534
 535         case SND_SOC_BIAS_STANDBY:
 536                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 537
 538                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 539                         /* Initial cap charge at VMID 5k */
 540                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 541                         mdelay(100);
 542                 }
 543
 544                 power1 |= 0x2;  /* VMID 500k */
 545                 snd_soc_write(codec, WM8974_POWER1, power1);
 546                 break;
 547
 548         case SND_SOC_BIAS_OFF:
 549                 snd_soc_write(codec, WM8974_POWER1, 0);
 550                 snd_soc_write(codec, WM8974_POWER2, 0);
 551                 snd_soc_write(codec, WM8974_POWER3, 0);
 552                 break;
 553         }
 554
 555         codec->bias_level = level;
 556         return 0;
 557 }
 558
 559 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 560
 561 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 562         SNDRV_PCM_FMTBIT_S24_LE)
 563
 564 static struct snd_soc_dai_ops wm8974_ops = {
 565         .hw_params = wm8974_pcm_hw_params,
 566         .digital_mute = wm8974_mute,
 567         .set_fmt = wm8974_set_dai_fmt,
 568         .set_clkdiv = wm8974_set_dai_clkdiv,
 569         .set_pll = wm8974_set_dai_pll,
 570 };
 571
 572 struct snd_soc_dai wm8974_dai = {
 573         .name = "WM8974 HiFi",
 574         .playback = {
 575                 .stream_name = "Playback",
 576                 .channels_min = 1,
 577                 .channels_max = 2,   /* Only 1 channel of data */
 578                 .rates = WM8974_RATES,
 579                 .formats = WM8974_FORMATS,},
 580         .capture = {
 581                 .stream_name = "Capture",
 582                 .channels_min = 1,
 583                 .channels_max = 2,   /* Only 1 channel of data */
 584                 .rates = WM8974_RATES,
 585                 .formats = WM8974_FORMATS,},
 586         .ops = &wm8974_ops,
 587         .symmetric_rates = 1,
 588 };
 589 EXPORT_SYMBOL_GPL(wm8974_dai);
 590
 591 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
 592 {
 593         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 594         struct snd_soc_codec *codec = socdev->card->codec;
 595
 596         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 597         return 0;
 598 }
 599
 600 static int wm8974_resume(struct platform_device *pdev)
 601 {
 602         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 603         struct snd_soc_codec *codec = socdev->card->codec;
 604         int i;
 605         u8 data[2];
 606         u16 *cache = codec->reg_cache;
 607
 608         /* Sync reg_cache with the hardware */
 609         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 610                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 611                 data[1] = cache[i] & 0x00ff;
 612                 codec->hw_write(codec->control_data, data, 2);
 613         }
 614         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 615         wm8974_set_bias_level(codec, codec->suspend_bias_level);
 616         return 0;
 617 }
 618
 619 static int wm8974_probe(struct platform_device *pdev)
 620 {
 621         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 622         struct snd_soc_codec *codec;
 623         int ret = 0;
 624
 625         if (wm8974_codec == NULL) {
 626                 dev_err(&pdev->dev, "Codec device not registered\n");
 627                 return -ENODEV;
 628         }
 629
 630         socdev->card->codec = wm8974_codec;
 631         codec = wm8974_codec;
 632
 633         /* register pcms */
 634         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 635         if (ret < 0) {
 636                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 637                 goto pcm_err;
 638         }
 639
 640         snd_soc_add_controls(codec, wm8974_snd_controls,
 641                              ARRAY_SIZE(wm8974_snd_controls));
 642         wm8974_add_widgets(codec);
 643
 644         return ret;
 645
 646 pcm_err:
 647         return ret;
 648 }
 649
 650 /* power down chip */
 651 static int wm8974_remove(struct platform_device *pdev)
 652 {
 653         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 654
 655         snd_soc_free_pcms(socdev);
 656         snd_soc_dapm_free(socdev);
 657
 658         return 0;
 659 }
 660
 661 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
 662         .probe =        wm8974_probe,
 663         .remove =       wm8974_remove,
 664         .suspend =      wm8974_suspend,
 665         .resume =       wm8974_resume,
 666 };
 667 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
 668
 669 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
 670 {
 671         int ret;
 672         struct snd_soc_codec *codec = &wm8974->codec;
 673
 674         if (wm8974_codec) {
 675                 dev_err(codec->dev, "Another WM8974 is registered\n");
 676                 return -EINVAL;
 677         }
 678
 679         mutex_init(&codec->mutex);
 680         INIT_LIST_HEAD(&codec->dapm_widgets);
 681         INIT_LIST_HEAD(&codec->dapm_paths);
 682
 683         codec->private_data = wm8974;
 684         codec->name = "WM8974";
 685         codec->owner = THIS_MODULE;
 686         codec->bias_level = SND_SOC_BIAS_OFF;
 687         codec->set_bias_level = wm8974_set_bias_level;
 688         codec->dai = &wm8974_dai;
 689         codec->num_dai = 1;
 690         codec->reg_cache_size = WM8974_CACHEREGNUM;
 691         codec->reg_cache = &wm8974->reg_cache;
 692
 693         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 694         if (ret < 0) {
 695                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 696                 goto err;
 697         }
 698
 699         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 700
 701         ret = wm8974_reset(codec);
 702         if (ret < 0) {
 703                 dev_err(codec->dev, "Failed to issue reset\n");
 704                 goto err;
 705         }
 706
 707         wm8974_dai.dev = codec->dev;
 708
 709         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 710
 711         wm8974_codec = codec;
 712
 713         ret = snd_soc_register_codec(codec);
 714         if (ret != 0) {
 715                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 716                 goto err;
 717         }
 718
 719         ret = snd_soc_register_dai(&wm8974_dai);
 720         if (ret != 0) {
 721                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 722                 goto err_codec;
 723         }
 724
 725         return 0;
 726
 727 err_codec:
 728         snd_soc_unregister_codec(codec);
 729 err:
 730         kfree(wm8974);
 731         return ret;
 732 }
 733
 734 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
 735 {
 736         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
 737         snd_soc_unregister_dai(&wm8974_dai);
 738         snd_soc_unregister_codec(&wm8974->codec);
 739         kfree(wm8974);
 740         wm8974_codec = NULL;
 741 }
 742
 743 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 744                                       const struct i2c_device_id *id)
 745 {
 746         struct wm8974_priv *wm8974;
 747         struct snd_soc_codec *codec;
 748
 749         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 750         if (wm8974 == NULL)
 751                 return -ENOMEM;
 752
 753         codec = &wm8974->codec;
 754         codec->hw_write = (hw_write_t)i2c_master_send;
 755
 756         i2c_set_clientdata(i2c, wm8974);
 757         codec->control_data = i2c;
 758
 759         codec->dev = &i2c->dev;
 760
 761         return wm8974_register(wm8974);
 762 }
 763
 764 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 765 {
 766         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
 767         wm8974_unregister(wm8974);
 768         return 0;
 769 }
 770
 771 static const struct i2c_device_id wm8974_i2c_id[] = {
 772         { "wm8974", 0 },
 773         { }
 774 };
 775 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 776
 777 static struct i2c_driver wm8974_i2c_driver = {
 778         .driver = {
 779                 .name = "WM8974",
 780                 .owner = THIS_MODULE,
 781         },
 782         .probe =    wm8974_i2c_probe,
 783         .remove =   __devexit_p(wm8974_i2c_remove),
 784         .id_table = wm8974_i2c_id,
 785 };
 786
 787 static int __init wm8974_modinit(void)
 788 {
 789         return i2c_add_driver(&wm8974_i2c_driver);
 790 }
 791 module_init(wm8974_modinit);
 792
 793 static void __exit wm8974_exit(void)
 794 {
 795         i2c_del_driver(&wm8974_i2c_driver);
 796 }
 797 module_exit(wm8974_exit);
 798
 799 MODULE_DESCRIPTION("ASoC WM8974 driver");
 800 MODULE_AUTHOR("Liam Girdwood");
 801 MODULE_LICENSE("GPL");