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 /*
  61  * read wm8974 register cache
  62  */
  63 static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec *codec,
  64         unsigned int reg)
  65 {
  66         u16 *cache = codec->reg_cache;
  67         if (reg == WM8974_RESET)
  68                 return 0;
  69         if (reg >= WM8974_CACHEREGNUM)
  70                 return -1;
  71         return cache[reg];
  72 }
  73
  74 /*
  75  * write wm8974 register cache
  76  */
  77 static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
  78         u16 reg, unsigned int value)
  79 {
  80         u16 *cache = codec->reg_cache;
  81         if (reg >= WM8974_CACHEREGNUM)
  82                 return;
  83         cache[reg] = value;
  84 }
  85
  86 /*
  87  * write to the WM8974 register space
  88  */
  89 static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
  90         unsigned int value)
  91 {
  92         u8 data[2];
  93
  94         /* data is
  95          *   D15..D9 WM8974 register offset
  96          *   D8...D0 register data
  97          */
  98         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
  99         data[1] = value & 0x00ff;
 100
 101         wm8974_write_reg_cache(codec, reg, value);
 102         if (codec->hw_write(codec->control_data, data, 2) == 2)
 103                 return 0;
 104         else
 105                 return -EIO;
 106 }
 107
 108 #define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
 109
 110 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 111 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
 112 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
 113 static const char *wm8974_bw[] = {"Narrow", "Wide" };
 114 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
 115 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
 116 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
 117 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
 118 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
 119 static const char *wm8974_alc[] = {"ALC", "Limiter" };
 120
 121 static const struct soc_enum wm8974_enum[] = {
 122         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
 123         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
 124         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
 125         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
 126
 127         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
 128         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
 129         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
 130         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
 131
 132         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
 133         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
 134         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
 135         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
 136
 137         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
 138         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
 139 };
 140
 141 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
 142
 143 static const struct soc_enum wm8974_auxmode =
 144         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
 145
 146 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
 147 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
 148 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 149 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 150
 151 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 152
 153 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 154
 155 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 156 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 157
 158 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 159 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 160
 161 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 162
 163 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 164 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 165 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 166
 167 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 168
 169 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 170 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 171 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 172
 173 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
 174 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 175 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 176
 177 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
 178 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 179 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 180
 181 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
 182 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 183 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 184
 185 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
 186 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 187 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 188
 189 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 190 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 191 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 192
 193 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 194 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 195
 196 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 197 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 198 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 199
 200 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 201 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 202 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 203
 204 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 205 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 206 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 207
 208 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 209 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 210
 211 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 212 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 213
 214 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 215 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 216 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 217
 218 SOC_ENUM("Aux Mode", wm8974_auxmode),
 219
 220 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 221 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 222 };
 223
 224 /* Speaker Output Mixer */
 225 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 226 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 227 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 228 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
 229 };
 230
 231 /* Mono Output Mixer */
 232 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 233 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 234 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 235 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 236 };
 237
 238 /* Boost mixer */
 239 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 240 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 241 };
 242
 243 /* Input PGA */
 244 static const struct snd_kcontrol_new wm8974_inpga[] = {
 245 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 246 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 247 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 248 };
 249
 250 /* AUX Input boost vol */
 251 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 252 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 253
 254 /* Mic Input boost vol */
 255 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 256 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 257
 258 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 259 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 260         &wm8974_speaker_mixer_controls[0],
 261         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 262 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 263         &wm8974_mono_mixer_controls[0],
 264         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 265 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 266 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 267 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 268 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 269 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 270 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 271
 272 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 273                    ARRAY_SIZE(wm8974_inpga)),
 274 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 275                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 276
 277 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
 278
 279 SND_SOC_DAPM_INPUT("MICN"),
 280 SND_SOC_DAPM_INPUT("MICP"),
 281 SND_SOC_DAPM_INPUT("AUX"),
 282 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 283 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 284 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 285 };
 286
 287 static const struct snd_soc_dapm_route audio_map[] = {
 288         /* Mono output mixer */
 289         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 290         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 291         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 292
 293         /* Speaker output mixer */
 294         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 295         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 296         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 297
 298         /* Outputs */
 299         {"Mono Out", NULL, "Mono Mixer"},
 300         {"MONOOUT", NULL, "Mono Out"},
 301         {"SpkN Out", NULL, "Speaker Mixer"},
 302         {"SpkP Out", NULL, "Speaker Mixer"},
 303         {"SPKOUTN", NULL, "SpkN Out"},
 304         {"SPKOUTP", NULL, "SpkP Out"},
 305
 306         /* Boost Mixer */
 307         {"ADC", NULL, "Boost Mixer"},
 308         {"Boost Mixer", "Aux Switch", "Aux Input"},
 309         {"Boost Mixer", NULL, "Input PGA"},
 310         {"Boost Mixer", NULL, "MICP"},
 311
 312         /* Input PGA */
 313         {"Input PGA", "Aux Switch", "Aux Input"},
 314         {"Input PGA", "MicN Switch", "MICN"},
 315         {"Input PGA", "MicP Switch", "MICP"},
 316
 317         /* Inputs */
 318         {"Aux Input", NULL, "AUX"},
 319 };
 320
 321 static int wm8974_add_widgets(struct snd_soc_codec *codec)
 322 {
 323         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
 324                                   ARRAY_SIZE(wm8974_dapm_widgets));
 325
 326         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 327
 328         snd_soc_dapm_new_widgets(codec);
 329         return 0;
 330 }
 331
 332 struct pll_ {
 333         unsigned int pre_div:1;
 334         unsigned int n:4;
 335         unsigned int k;
 336 };
 337
 338 /* The size in bits of the pll divide multiplied by 10
 339  * to allow rounding later */
 340 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 341
 342 static void pll_factors(struct pll_ *pll_div,
 343                         unsigned int target, unsigned int source)
 344 {
 345         unsigned long long Kpart;
 346         unsigned int K, Ndiv, Nmod;
 347
 348         /* There is a fixed divide by 4 in the output path */
 349         target *= 4;
 350
 351         Ndiv = target / source;
 352         if (Ndiv < 6) {
 353                 source /= 2;
 354                 pll_div->pre_div = 1;
 355                 Ndiv = target / source;
 356         } else
 357                 pll_div->pre_div = 0;
 358
 359         if ((Ndiv < 6) || (Ndiv > 12))
 360                 printk(KERN_WARNING
 361                         "WM8974 N value %u outwith recommended range!\n",
 362                         Ndiv);
 363
 364         pll_div->n = Ndiv;
 365         Nmod = target % source;
 366         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 367
 368         do_div(Kpart, source);
 369
 370         K = Kpart & 0xFFFFFFFF;
 371
 372         /* Check if we need to round */
 373         if ((K % 10) >= 5)
 374                 K += 5;
 375
 376         /* Move down to proper range now rounding is done */
 377         K /= 10;
 378
 379         pll_div->k = K;
 380 }
 381
 382 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
 383                 int pll_id, unsigned int freq_in, unsigned int freq_out)
 384 {
 385         struct snd_soc_codec *codec = codec_dai->codec;
 386         struct pll_ pll_div;
 387         u16 reg;
 388
 389         if (freq_in == 0 || freq_out == 0) {
 390                 /* Clock CODEC directly from MCLK */
 391                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
 392                 wm8974_write(codec, WM8974_CLOCK, reg & 0x0ff);
 393
 394                 /* Turn off PLL */
 395                 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
 396                 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
 397                 return 0;
 398         }
 399
 400         pll_factors(&pll_div, freq_out, freq_in);
 401
 402         wm8974_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 403         wm8974_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 404         wm8974_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 405         wm8974_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 406         reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
 407         wm8974_write(codec, WM8974_POWER1, reg | 0x020);
 408
 409         /* Run CODEC from PLL instead of MCLK */
 410         reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
 411         wm8974_write(codec, WM8974_CLOCK, reg | 0x100);
 412
 413         return 0;
 414 }
 415
 416 /*
 417  * Configure WM8974 clock dividers.
 418  */
 419 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 420                 int div_id, int div)
 421 {
 422         struct snd_soc_codec *codec = codec_dai->codec;
 423         u16 reg;
 424
 425         switch (div_id) {
 426         case WM8974_OPCLKDIV:
 427                 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
 428                 wm8974_write(codec, WM8974_GPIO, reg | div);
 429                 break;
 430         case WM8974_MCLKDIV:
 431                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
 432                 wm8974_write(codec, WM8974_CLOCK, reg | div);
 433                 break;
 434         case WM8974_ADCCLK:
 435                 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
 436                 wm8974_write(codec, WM8974_ADC, reg | div);
 437                 break;
 438         case WM8974_DACCLK:
 439                 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
 440                 wm8974_write(codec, WM8974_DAC, reg | div);
 441                 break;
 442         case WM8974_BCLKDIV:
 443                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
 444                 wm8974_write(codec, WM8974_CLOCK, reg | div);
 445                 break;
 446         default:
 447                 return -EINVAL;
 448         }
 449
 450         return 0;
 451 }
 452
 453 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 454                 unsigned int fmt)
 455 {
 456         struct snd_soc_codec *codec = codec_dai->codec;
 457         u16 iface = 0;
 458         u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
 459
 460         /* set master/slave audio interface */
 461         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 462         case SND_SOC_DAIFMT_CBM_CFM:
 463                 clk |= 0x0001;
 464                 break;
 465         case SND_SOC_DAIFMT_CBS_CFS:
 466                 break;
 467         default:
 468                 return -EINVAL;
 469         }
 470
 471         /* interface format */
 472         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 473         case SND_SOC_DAIFMT_I2S:
 474                 iface |= 0x0010;
 475                 break;
 476         case SND_SOC_DAIFMT_RIGHT_J:
 477                 break;
 478         case SND_SOC_DAIFMT_LEFT_J:
 479                 iface |= 0x0008;
 480                 break;
 481         case SND_SOC_DAIFMT_DSP_A:
 482                 iface |= 0x00018;
 483                 break;
 484         default:
 485                 return -EINVAL;
 486         }
 487
 488         /* clock inversion */
 489         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 490         case SND_SOC_DAIFMT_NB_NF:
 491                 break;
 492         case SND_SOC_DAIFMT_IB_IF:
 493                 iface |= 0x0180;
 494                 break;
 495         case SND_SOC_DAIFMT_IB_NF:
 496                 iface |= 0x0100;
 497                 break;
 498         case SND_SOC_DAIFMT_NB_IF:
 499                 iface |= 0x0080;
 500                 break;
 501         default:
 502                 return -EINVAL;
 503         }
 504
 505         wm8974_write(codec, WM8974_IFACE, iface);
 506         wm8974_write(codec, WM8974_CLOCK, clk);
 507         return 0;
 508 }
 509
 510 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 511                                 struct snd_pcm_hw_params *params,
 512                                 struct snd_soc_dai *dai)
 513 {
 514         struct snd_soc_codec *codec = dai->codec;
 515         u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
 516         u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
 517
 518         /* bit size */
 519         switch (params_format(params)) {
 520         case SNDRV_PCM_FORMAT_S16_LE:
 521                 break;
 522         case SNDRV_PCM_FORMAT_S20_3LE:
 523                 iface |= 0x0020;
 524                 break;
 525         case SNDRV_PCM_FORMAT_S24_LE:
 526                 iface |= 0x0040;
 527                 break;
 528         case SNDRV_PCM_FORMAT_S32_LE:
 529                 iface |= 0x0060;
 530                 break;
 531         }
 532
 533         /* filter coefficient */
 534         switch (params_rate(params)) {
 535         case SNDRV_PCM_RATE_8000:
 536                 adn |= 0x5 << 1;
 537                 break;
 538         case SNDRV_PCM_RATE_11025:
 539                 adn |= 0x4 << 1;
 540                 break;
 541         case SNDRV_PCM_RATE_16000:
 542                 adn |= 0x3 << 1;
 543                 break;
 544         case SNDRV_PCM_RATE_22050:
 545                 adn |= 0x2 << 1;
 546                 break;
 547         case SNDRV_PCM_RATE_32000:
 548                 adn |= 0x1 << 1;
 549                 break;
 550         case SNDRV_PCM_RATE_44100:
 551         case SNDRV_PCM_RATE_48000:
 552                 break;
 553         }
 554
 555         wm8974_write(codec, WM8974_IFACE, iface);
 556         wm8974_write(codec, WM8974_ADD, adn);
 557         return 0;
 558 }
 559
 560 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 561 {
 562         struct snd_soc_codec *codec = dai->codec;
 563         u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
 564
 565         if (mute)
 566                 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
 567         else
 568                 wm8974_write(codec, WM8974_DAC, mute_reg);
 569         return 0;
 570 }
 571
 572 /* liam need to make this lower power with dapm */
 573 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 574         enum snd_soc_bias_level level)
 575 {
 576         u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
 577
 578         switch (level) {
 579         case SND_SOC_BIAS_ON:
 580         case SND_SOC_BIAS_PREPARE:
 581                 power1 |= 0x1;  /* VMID 50k */
 582                 wm8974_write(codec, WM8974_POWER1, power1);
 583                 break;
 584
 585         case SND_SOC_BIAS_STANDBY:
 586                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 587
 588                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 589                         /* Initial cap charge at VMID 5k */
 590                         wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
 591                         mdelay(100);
 592                 }
 593
 594                 power1 |= 0x2;  /* VMID 500k */
 595                 wm8974_write(codec, WM8974_POWER1, power1);
 596                 break;
 597
 598         case SND_SOC_BIAS_OFF:
 599                 wm8974_write(codec, WM8974_POWER1, 0);
 600                 wm8974_write(codec, WM8974_POWER2, 0);
 601                 wm8974_write(codec, WM8974_POWER3, 0);
 602                 break;
 603         }
 604
 605         codec->bias_level = level;
 606         return 0;
 607 }
 608
 609 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 610
 611 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 612         SNDRV_PCM_FMTBIT_S24_LE)
 613
 614 static struct snd_soc_dai_ops wm8974_ops = {
 615         .hw_params = wm8974_pcm_hw_params,
 616         .digital_mute = wm8974_mute,
 617         .set_fmt = wm8974_set_dai_fmt,
 618         .set_clkdiv = wm8974_set_dai_clkdiv,
 619         .set_pll = wm8974_set_dai_pll,
 620 };
 621
 622 struct snd_soc_dai wm8974_dai = {
 623         .name = "WM8974 HiFi",
 624         .playback = {
 625                 .stream_name = "Playback",
 626                 .channels_min = 1,
 627                 .channels_max = 2,   /* Only 1 channel of data */
 628                 .rates = WM8974_RATES,
 629                 .formats = WM8974_FORMATS,},
 630         .capture = {
 631                 .stream_name = "Capture",
 632                 .channels_min = 1,
 633                 .channels_max = 2,   /* Only 1 channel of data */
 634                 .rates = WM8974_RATES,
 635                 .formats = WM8974_FORMATS,},
 636         .ops = &wm8974_ops,
 637         .symmetric_rates = 1,
 638 };
 639 EXPORT_SYMBOL_GPL(wm8974_dai);
 640
 641 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
 642 {
 643         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 644         struct snd_soc_codec *codec = socdev->card->codec;
 645
 646         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
 647         return 0;
 648 }
 649
 650 static int wm8974_resume(struct platform_device *pdev)
 651 {
 652         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 653         struct snd_soc_codec *codec = socdev->card->codec;
 654         int i;
 655         u8 data[2];
 656         u16 *cache = codec->reg_cache;
 657
 658         /* Sync reg_cache with the hardware */
 659         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
 660                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 661                 data[1] = cache[i] & 0x00ff;
 662                 codec->hw_write(codec->control_data, data, 2);
 663         }
 664         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 665         wm8974_set_bias_level(codec, codec->suspend_bias_level);
 666         return 0;
 667 }
 668
 669 static int wm8974_probe(struct platform_device *pdev)
 670 {
 671         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 672         struct snd_soc_codec *codec;
 673         int ret = 0;
 674
 675         if (wm8974_codec == NULL) {
 676                 dev_err(&pdev->dev, "Codec device not registered\n");
 677                 return -ENODEV;
 678         }
 679
 680         socdev->card->codec = wm8974_codec;
 681         codec = wm8974_codec;
 682
 683         /* register pcms */
 684         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 685         if (ret < 0) {
 686                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 687                 goto pcm_err;
 688         }
 689
 690         snd_soc_add_controls(codec, wm8974_snd_controls,
 691                              ARRAY_SIZE(wm8974_snd_controls));
 692         wm8974_add_widgets(codec);
 693         ret = snd_soc_init_card(socdev);
 694         if (ret < 0) {
 695                 dev_err(codec->dev, "failed to register card: %d\n", ret);
 696                 goto card_err;
 697         }
 698
 699         return ret;
 700
 701 card_err:
 702         snd_soc_free_pcms(socdev);
 703         snd_soc_dapm_free(socdev);
 704 pcm_err:
 705         return ret;
 706 }
 707
 708 /* power down chip */
 709 static int wm8974_remove(struct platform_device *pdev)
 710 {
 711         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 712
 713         snd_soc_free_pcms(socdev);
 714         snd_soc_dapm_free(socdev);
 715
 716         return 0;
 717 }
 718
 719 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
 720         .probe =        wm8974_probe,
 721         .remove =       wm8974_remove,
 722         .suspend =      wm8974_suspend,
 723         .resume =       wm8974_resume,
 724 };
 725 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
 726
 727 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
 728 {
 729         int ret;
 730         struct snd_soc_codec *codec = &wm8974->codec;
 731
 732         if (wm8974_codec) {
 733                 dev_err(codec->dev, "Another WM8974 is registered\n");
 734                 return -EINVAL;
 735         }
 736
 737         mutex_init(&codec->mutex);
 738         INIT_LIST_HEAD(&codec->dapm_widgets);
 739         INIT_LIST_HEAD(&codec->dapm_paths);
 740
 741         codec->private_data = wm8974;
 742         codec->name = "WM8974";
 743         codec->owner = THIS_MODULE;
 744         codec->read = wm8974_read_reg_cache;
 745         codec->write = wm8974_write;
 746         codec->bias_level = SND_SOC_BIAS_OFF;
 747         codec->set_bias_level = wm8974_set_bias_level;
 748         codec->dai = &wm8974_dai;
 749         codec->num_dai = 1;
 750         codec->reg_cache_size = WM8974_CACHEREGNUM;
 751         codec->reg_cache = &wm8974->reg_cache;
 752
 753         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 754
 755         ret = wm8974_reset(codec);
 756         if (ret < 0) {
 757                 dev_err(codec->dev, "Failed to issue reset\n");
 758                 return ret;
 759         }
 760
 761         wm8974_dai.dev = codec->dev;
 762
 763         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 764
 765         wm8974_codec = codec;
 766
 767         ret = snd_soc_register_codec(codec);
 768         if (ret != 0) {
 769                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 770                 return ret;
 771         }
 772
 773         ret = snd_soc_register_dai(&wm8974_dai);
 774         if (ret != 0) {
 775                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 776                 snd_soc_unregister_codec(codec);
 777                 return ret;
 778         }
 779
 780         return 0;
 781 }
 782
 783 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
 784 {
 785         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
 786         snd_soc_unregister_dai(&wm8974_dai);
 787         snd_soc_unregister_codec(&wm8974->codec);
 788         kfree(wm8974);
 789         wm8974_codec = NULL;
 790 }
 791
 792 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
 793                                       const struct i2c_device_id *id)
 794 {
 795         struct wm8974_priv *wm8974;
 796         struct snd_soc_codec *codec;
 797
 798         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
 799         if (wm8974 == NULL)
 800                 return -ENOMEM;
 801
 802         codec = &wm8974->codec;
 803         codec->hw_write = (hw_write_t)i2c_master_send;
 804
 805         i2c_set_clientdata(i2c, wm8974);
 806         codec->control_data = i2c;
 807
 808         codec->dev = &i2c->dev;
 809
 810         return wm8974_register(wm8974);
 811 }
 812
 813 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 814 {
 815         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
 816         wm8974_unregister(wm8974);
 817         return 0;
 818 }
 819
 820 static const struct i2c_device_id wm8974_i2c_id[] = {
 821         { "wm8974", 0 },
 822         { }
 823 };
 824 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 825
 826 static struct i2c_driver wm8974_i2c_driver = {
 827         .driver = {
 828                 .name = "WM8974",
 829                 .owner = THIS_MODULE,
 830         },
 831         .probe =    wm8974_i2c_probe,
 832         .remove =   __devexit_p(wm8974_i2c_remove),
 833         .id_table = wm8974_i2c_id,
 834 };
 835
 836 static int __init wm8974_modinit(void)
 837 {
 838         return i2c_add_driver(&wm8974_i2c_driver);
 839 }
 840 module_init(wm8974_modinit);
 841
 842 static void __exit wm8974_exit(void)
 843 {
 844         i2c_del_driver(&wm8974_i2c_driver);
 845 }
 846 module_exit(wm8974_exit);
 847
 848 MODULE_DESCRIPTION("ASoC WM8974 driver");
 849 MODULE_AUTHOR("Liam Girdwood");
 850 MODULE_LICENSE("GPL");