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/version.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.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 0x10
  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
 176 /* Speaker Output Mixer */
 177 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 178 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 179 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 180 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
 181 };
 182
 183 /* Mono Output Mixer */
 184 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 186 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 187 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 188 };
 189
 190 /* Boost mixer */
 191 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 193 };
 194
 195 /* Input PGA */
 196 static const struct snd_kcontrol_new wm8974_inpga[] = {
 197 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 198 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 199 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 200 };
 201
 202 /* AUX Input boost vol */
 203 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 204 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 205
 206 /* Mic Input boost vol */
 207 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 208 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 209
 210 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 211 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 212         &wm8974_speaker_mixer_controls[0],
 213         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 214 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 215         &wm8974_mono_mixer_controls[0],
 216         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 217 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 218 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 219 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 220 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 221 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 222 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 223
 224 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 225                    ARRAY_SIZE(wm8974_inpga)),
 226 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 227                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 228
 229 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 230
 231 SND_SOC_DAPM_INPUT("MICN"),
 232 SND_SOC_DAPM_INPUT("MICP"),
 233 SND_SOC_DAPM_INPUT("AUX"),
 234 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 235 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 236 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 237 };
 238
 239 static const struct snd_soc_dapm_route audio_map[] = {
 240         /* Mono output mixer */
 241         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 242         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 243         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 244
 245         /* Speaker output mixer */
 246         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 247         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 248         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 249
 250         /* Outputs */
 251         {"Mono Out", NULL, "Mono Mixer"},
 252         {"MONOOUT", NULL, "Mono Out"},
 253         {"SpkN Out", NULL, "Speaker Mixer"},
 254         {"SpkP Out", NULL, "Speaker Mixer"},
 255         {"SPKOUTN", NULL, "SpkN Out"},
 256         {"SPKOUTP", NULL, "SpkP Out"},
 257
 258         /* Boost Mixer */
 259         {"ADC", NULL, "Boost Mixer"},
 260         {"Boost Mixer", "Aux Switch", "Aux Input"},
 261         {"Boost Mixer", NULL, "Input PGA"},
 262         {"Boost Mixer", NULL, "MICP"},
 263
 264         /* Input PGA */
 265         {"Input PGA", "Aux Switch", "Aux Input"},
 266         {"Input PGA", "MicN Switch", "MICN"},
 267         {"Input PGA", "MicP Switch", "MICP"},
 268
 269         /* Inputs */
 270         {"Aux Input", NULL, "AUX"},
 271 };
 272
 273 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 274 {
 275         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
 276                                   ARRAY_SIZE(wm8974_dapm_widgets));
 277
 278         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 279
 280         snd_soc_dapm_new_widgets(codec);
 281         return 0;
 282 }
 283
 284 struct pll_ {
 285         unsigned int pre_div:4; /* prescale - 1 */
 286         unsigned int n:4;
 287         unsigned int k;
 288 };
 289
 290 static struct pll_ pll_div;
 291
 292 /* The size in bits of the pll divide multiplied by 10
 293  * to allow rounding later */
 294 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 295
 296 static void pll_factors(unsigned int target, unsigned int source)
 297 {
 298         unsigned long long Kpart;
 299         unsigned int K, Ndiv, Nmod;
 300
 301         Ndiv = target / source;
 302         if (Ndiv < 6) {
 303                 source >>= 1;
 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,
 333                 int pll_id, unsigned int freq_in, unsigned int freq_out)
 334 {
 335         struct snd_soc_codec *codec = codec_dai->codec;
 336         u16 reg;
 337
 338         if (freq_in == 0 || freq_out == 0) {
 339                 /* Clock CODEC directly from MCLK */
 340                 reg = snd_soc_read(codec, WM8974_CLOCK);
 341                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 342
 343                 /* Turn off PLL */
 344                 reg = snd_soc_read(codec, WM8974_POWER1);
 345                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 346                 return 0;
 347         }
 348
 349         pll_factors(freq_out*4, freq_in);
 350
 351         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 352         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 353         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 354         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 355         reg = snd_soc_read(codec, WM8974_POWER1);
 356         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 357
 358         /* Run CODEC from PLL instead of MCLK */
 359         reg = snd_soc_read(codec, WM8974_CLOCK);
 360         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 361
 362         return 0;
 363 }
 364
 365 /*
 366  * Configure WM8974 clock dividers.
 367  */
 368 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 369                 int div_id, int div)
 370 {
 371         struct snd_soc_codec *codec = codec_dai->codec;
 372         u16 reg;
 373
 374         switch (div_id) {
 375         case WM8974_OPCLKDIV:
 376                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 377                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 378                 break;
 379         case WM8974_MCLKDIV:
 380                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 381                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 382                 break;
 383         case WM8974_ADCCLK:
 384                 reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7;
 385                 snd_soc_write(codec, WM8974_ADC, reg | div);
 386                 break;
 387         case WM8974_DACCLK:
 388                 reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7;
 389                 snd_soc_write(codec, WM8974_DAC, reg | div);
 390                 break;
 391         case WM8974_BCLKDIV:
 392                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 393                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 394                 break;
 395         default:
 396                 return -EINVAL;
 397         }
 398
 399         return 0;
 400 }
 401
 402 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 403                 unsigned int fmt)
 404 {
 405         struct snd_soc_codec *codec = codec_dai->codec;
 406         u16 iface = 0;
 407         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 408
 409         /* set master/slave audio interface */
 410         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 411         case SND_SOC_DAIFMT_CBM_CFM:
 412                 clk |= 0x0001;
 413                 break;
 414         case SND_SOC_DAIFMT_CBS_CFS:
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419
 420         /* interface format */
 421         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 422         case SND_SOC_DAIFMT_I2S:
 423                 iface |= 0x0010;
 424                 break;
 425         case SND_SOC_DAIFMT_RIGHT_J:
 426                 break;
 427         case SND_SOC_DAIFMT_LEFT_J:
 428                 iface |= 0x0008;
 429                 break;
 430         case SND_SOC_DAIFMT_DSP_A:
 431                 iface |= 0x00018;
 432                 break;
 433         default:
 434                 return -EINVAL;
 435         }
 436
 437         /* clock inversion */
 438         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 439         case SND_SOC_DAIFMT_NB_NF:
 440                 break;
 441         case SND_SOC_DAIFMT_IB_IF:
 442                 iface |= 0x0180;
 443                 break;
 444         case SND_SOC_DAIFMT_IB_NF:
 445                 iface |= 0x0100;
 446                 break;
 447         case SND_SOC_DAIFMT_NB_IF:
 448                 iface |= 0x0080;
 449                 break;
 450         default:
 451                 return -EINVAL;
 452         }
 453
 454         snd_soc_write(codec, WM8974_IFACE, iface);
 455         snd_soc_write(codec, WM8974_CLOCK, clk);
 456         return 0;
 457 }
 458
 459 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 460                                 struct snd_pcm_hw_params *params,
 461                                 struct snd_soc_dai *dai)
 462 {
 463         struct snd_soc_codec *codec = dai->codec;
 464         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 465         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 466
 467         /* bit size */
 468         switch (params_format(params)) {
 469         case SNDRV_PCM_FORMAT_S16_LE:
 470                 break;
 471         case SNDRV_PCM_FORMAT_S20_3LE:
 472                 iface |= 0x0020;
 473                 break;
 474         case SNDRV_PCM_FORMAT_S24_LE:
 475                 iface |= 0x0040;
 476                 break;
 477         case SNDRV_PCM_FORMAT_S32_LE:
 478                 iface |= 0x0060;
 479                 break;
 480         }
 481
 482         /* filter coefficient */
 483         switch (params_rate(params)) {
 484         case SNDRV_PCM_RATE_8000:
 485                 adn |= 0x5 << 1;
 486                 break;
 487         case SNDRV_PCM_RATE_11025:
 488                 adn |= 0x4 << 1;
 489                 break;
 490         case SNDRV_PCM_RATE_16000:
 491                 adn |= 0x3 << 1;
 492                 break;
 493         case SNDRV_PCM_RATE_22050:
 494                 adn |= 0x2 << 1;
 495                 break;
 496         case SNDRV_PCM_RATE_32000:
 497                 adn |= 0x1 << 1;
 498                 break;
 499         case SNDRV_PCM_RATE_44100:
 500         case SNDRV_PCM_RATE_48000:
 501                 break;
 502         }
 503
 504         snd_soc_write(codec, WM8974_IFACE, iface);
 505         snd_soc_write(codec, WM8974_ADD, adn);
 506         return 0;
 507 }
 508
 509 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 510 {
 511         struct snd_soc_codec *codec = dai->codec;
 512         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 513
 514         if (mute)
 515                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 516         else
 517                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 518         return 0;
 519 }
 520
 521 /* liam need to make this lower power with dapm */
 522 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 523         enum snd_soc_bias_level level)
 524 {
 525         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 526
 527         switch (level) {
 528         case SND_SOC_BIAS_ON:
 529         case SND_SOC_BIAS_PREPARE:
 530                 power1 |= 0x1;  /* VMID 50k */
 531                 snd_soc_write(codec, WM8974_POWER1, power1);
 532                 break;
 533
 534         case SND_SOC_BIAS_STANDBY:
 535                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 536
 537                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 538                         /* Initial cap charge at VMID 5k */
 539                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 540                         mdelay(100);
 541                 }
 542
 543                 power1 |= 0x2;  /* VMID 500k */
 544                 snd_soc_write(codec, WM8974_POWER1, power1);
 545                 break;
 546
 547         case SND_SOC_BIAS_OFF:
 548                 snd_soc_write(codec, WM8974_POWER1, 0);
 549                 snd_soc_write(codec, WM8974_POWER2, 0);
 550                 snd_soc_write(codec, WM8974_POWER3, 0);
 551                 break;
 552         }
 553
 554         codec->bias_level = level;
 555         return 0;
 556 }
 557
 558 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 559
 560 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 561         SNDRV_PCM_FMTBIT_S24_LE)
 562
 563 static struct snd_soc_dai_ops wm8974_ops = {
 564         .hw_params = wm8974_pcm_hw_params,
 565         .digital_mute = wm8974_mute,
 566         .set_fmt = wm8974_set_dai_fmt,
 567         .set_clkdiv = wm8974_set_dai_clkdiv,
 568         .set_pll = wm8974_set_dai_pll,
 569 };
 570
 571 struct snd_soc_dai wm8974_dai = {
 572         .name = "WM8974 HiFi",
 573         .playback = {
 574                 .stream_name = "Playback",
 575                 .channels_min = 1,
 576                 .channels_max = 2,   /* Only 1 channel of data */
 577                 .rates = WM8974_RATES,
 578                 .formats = WM8974_FORMATS,},
 579         .capture = {
 580                 .stream_name = "Capture",
 581                 .channels_min = 1,
 582                 .channels_max = 2,   /* Only 1 channel of data */
 583                 .rates = WM8974_RATES,
 584                 .formats = WM8974_FORMATS,},
 585         .ops = &wm8974_ops,
 586         .symmetric_rates = 1,
 587 };
 588 EXPORT_SYMBOL_GPL(wm8974_dai);
 589
 590 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
 591 {
 592         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 593         struct snd_soc_codec *codec = socdev->card->codec;
 594
 595         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 596         return 0;
 597 }
 598
 599 static int wm8974_resume(struct platform_device *pdev)
 600 {
 601         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 602         struct snd_soc_codec *codec = socdev->card->codec;
 603         int i;
 604         u8 data[2];
 605         u16 *cache = codec->reg_cache;
 606
 607         /* Sync reg_cache with the hardware */
 608         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 609                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 610                 data[1] = cache[i] & 0x00ff;
 611                 codec->hw_write(codec->control_data, data, 2);
 612         }
 613         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 614         wm8974_set_bias_level(codec, codec->suspend_bias_level);
 615         return 0;
 616 }
 617
 618 static int wm8974_probe(struct platform_device *pdev)
 619 {
 620         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 621         struct snd_soc_codec *codec;
 622         int ret = 0;
 623
 624         if (wm8974_codec == NULL) {
 625                 dev_err(&pdev->dev, "Codec device not registered\n");
 626                 return -ENODEV;
 627         }
 628
 629         socdev->card->codec = wm8974_codec;
 630         codec = wm8974_codec;
 631
 632         /* register pcms */
 633         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 634         if (ret < 0) {
 635                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 636                 goto pcm_err;
 637         }
 638
 639         snd_soc_add_controls(codec, wm8974_snd_controls,
 640                              ARRAY_SIZE(wm8974_snd_controls));
 641         wm8974_add_widgets(codec);
 642         ret = snd_soc_init_card(socdev);
 643         if (ret < 0) {
 644                 dev_err(codec->dev, "failed to register card: %d\n", ret);
 645                 goto card_err;
 646         }
 647
 648         return ret;
 649
 650 card_err:
 651         snd_soc_free_pcms(socdev);
 652         snd_soc_dapm_free(socdev);
 653 pcm_err:
 654         return ret;
 655 }
 656
 657 /* power down chip */
 658 static int wm8974_remove(struct platform_device *pdev)
 659 {
 660         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 661
 662         snd_soc_free_pcms(socdev);
 663         snd_soc_dapm_free(socdev);
 664
 665         return 0;
 666 }
 667
 668 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
 669         .probe =        wm8974_probe,
 670         .remove =       wm8974_remove,
 671         .suspend =      wm8974_suspend,
 672         .resume =       wm8974_resume,
 673 };
 674 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
 675
 676 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
 677 {
 678         int ret;
 679         struct snd_soc_codec *codec = &wm8974->codec;
 680
 681         if (wm8974_codec) {
 682                 dev_err(codec->dev, "Another WM8974 is registered\n");
 683                 return -EINVAL;
 684         }
 685
 686         mutex_init(&codec->mutex);
 687         INIT_LIST_HEAD(&codec->dapm_widgets);
 688         INIT_LIST_HEAD(&codec->dapm_paths);
 689
 690         codec->private_data = wm8974;
 691         codec->name = "WM8974";
 692         codec->owner = THIS_MODULE;
 693         codec->bias_level = SND_SOC_BIAS_OFF;
 694         codec->set_bias_level = wm8974_set_bias_level;
 695         codec->dai = &wm8974_dai;
 696         codec->num_dai = 1;
 697         codec->reg_cache_size = WM8974_CACHEREGNUM;
 698         codec->reg_cache = &wm8974->reg_cache;
 699
 700         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
 701         if (ret < 0) {
 702                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 703                 goto err;
 704         }
 705
 706         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 707
 708         ret = wm8974_reset(codec);
 709         if (ret < 0) {
 710                 dev_err(codec->dev, "Failed to issue reset\n");
 711                 goto err;
 712         }
 713
 714         wm8974_dai.dev = codec->dev;
 715
 716         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 717
 718         wm8974_codec = codec;
 719
 720         ret = snd_soc_register_codec(codec);
 721         if (ret != 0) {
 722                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 723                 goto err;
 724         }
 725
 726         ret = snd_soc_register_dai(&wm8974_dai);
 727         if (ret != 0) {
 728                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 729                 goto err_codec;
 730         }
 731
 732         return 0;
 733
 734 err_codec:
 735         snd_soc_unregister_codec(codec);
 736 err:
 737         kfree(wm8974);
 738         return ret;
 739 }
 740
 741 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
 742 {
 743         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
 744         snd_soc_unregister_dai(&wm8974_dai);
 745         snd_soc_unregister_codec(&wm8974->codec);
 746         kfree(wm8974);
 747         wm8974_codec = NULL;
 748 }
 749
 750 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 751                                       const struct i2c_device_id *id)
 752 {
 753         struct wm8974_priv *wm8974;
 754         struct snd_soc_codec *codec;
 755
 756         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 757         if (wm8974 == NULL)
 758                 return -ENOMEM;
 759
 760         codec = &wm8974->codec;
 761         codec->hw_write = (hw_write_t)i2c_master_send;
 762
 763         i2c_set_clientdata(i2c, wm8974);
 764         codec->control_data = i2c;
 765
 766         codec->dev = &i2c->dev;
 767
 768         return wm8974_register(wm8974);
 769 }
 770
 771 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 772 {
 773         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
 774         wm8974_unregister(wm8974);
 775         return 0;
 776 }
 777
 778 static const struct i2c_device_id wm8974_i2c_id[] = {
 779         { "wm8974", 0 },
 780         { }
 781 };
 782 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 783
 784 static struct i2c_driver wm8974_i2c_driver = {
 785         .driver = {
 786                 .name = "WM8974",
 787                 .owner = THIS_MODULE,
 788         },
 789         .probe =    wm8974_i2c_probe,
 790         .remove =   __devexit_p(wm8974_i2c_remove),
 791         .id_table = wm8974_i2c_id,
 792 };
 793
 794 static int __init wm8974_modinit(void)
 795 {
 796         return i2c_add_driver(&wm8974_i2c_driver);
 797 }
 798 module_init(wm8974_modinit);
 799
 800 static void __exit wm8974_exit(void)
 801 {
 802         i2c_del_driver(&wm8974_i2c_driver);
 803 }
 804 module_exit(wm8974_exit);
 805
 806 MODULE_DESCRIPTION("ASoC WM8974 driver");
 807 MODULE_AUTHOR("Liam Girdwood");
 808 MODULE_LICENSE("GPL");