sound/soc/codecs/wm8974.c

   1 /*
   2  * wm8974.c  --  WM8974 ALSA Soc Audio driver
   3  *
   4  * Copyright 2006-2009 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/regmap.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/initval.h>
  27 #include <sound/tlv.h>
  28
  29 #include "wm8974.h"
  30
  31 static const struct reg_default wm8974_reg_defaults[] = {
  32         {  0, 0x0000 }, {  1, 0x0000 }, {  2, 0x0000 }, {  3, 0x0000 },
  33         {  4, 0x0050 }, {  5, 0x0000 }, {  6, 0x0140 }, {  7, 0x0000 },
  34         {  8, 0x0000 }, {  9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
  35         { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
  36         { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
  37         { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
  38         { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
  39         { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
  40         { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
  41         { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
  42         { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
  43         { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
  44         { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
  45         { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
  46         { 56, 0x0000 },
  47 };
  48
  49 #define WM8974_POWER1_BIASEN  0x08
  50 #define WM8974_POWER1_BUFIOEN 0x04
  51
  52 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  53
  54 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  55 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  56 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  57 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  58 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  59 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  60 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  61 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  62 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  63 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  64
  65 static const struct soc_enum wm8974_enum[] = {
  66         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  67         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  68         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  69         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  70
  71         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  72         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  73         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  74         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  75
  76         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  77         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  78         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  79         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  80
  81         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  82         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  83 };
  84
  85 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  86
  87 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
  88                             WM8974_INPUT,  3, wm8974_auxmode_text);
  89
  90 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  91 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  92 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
  93 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
  94
  95 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
  96
  97 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
  98
  99 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 100 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 101
 102 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 103 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 104
 105 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 106
 107 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 108 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 109 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 110
 111 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 112
 113 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 114 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 115 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 116
 117 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
 118 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 119 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 120
 121 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
 122 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 123 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 124
 125 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
 126 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 127 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 128
 129 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
 130 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 131 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 132
 133 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 134 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 135 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 136
 137 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 138 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 139
 140 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 141 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 142 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 143
 144 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 145 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 146 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 147
 148 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 149 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 150 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 151
 152 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 153 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 154
 155 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 156 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 157
 158 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 159 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 160 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 161
 162 SOC_ENUM("Aux Mode", wm8974_auxmode),
 163
 164 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 165 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 166
 167 /* DAC / ADC oversampling */
 168 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 169 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 170 };
 171
 172 /* Speaker Output Mixer */
 173 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 174 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 175 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 176 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 177 };
 178
 179 /* Mono Output Mixer */
 180 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 181 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 182 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 183 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 184 };
 185
 186 /* Boost mixer */
 187 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 188 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 189 };
 190
 191 /* Input PGA */
 192 static const struct snd_kcontrol_new wm8974_inpga[] = {
 193 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 194 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 195 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 196 };
 197
 198 /* AUX Input boost vol */
 199 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 200 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 201
 202 /* Mic Input boost vol */
 203 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 204 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 205
 206 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 207 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 208         &wm8974_speaker_mixer_controls[0],
 209         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 210 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 211         &wm8974_mono_mixer_controls[0],
 212         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 213 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 214 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 215 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 216 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 217 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 218 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 219
 220 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 221                    ARRAY_SIZE(wm8974_inpga)),
 222 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 223                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 224
 225 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
 226
 227 SND_SOC_DAPM_INPUT("MICN"),
 228 SND_SOC_DAPM_INPUT("MICP"),
 229 SND_SOC_DAPM_INPUT("AUX"),
 230 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 231 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 232 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 233 };
 234
 235 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
 236         /* Mono output mixer */
 237         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 238         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 239         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 240
 241         /* Speaker output mixer */
 242         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 243         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 244         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 245
 246         /* Outputs */
 247         {"Mono Out", NULL, "Mono Mixer"},
 248         {"MONOOUT", NULL, "Mono Out"},
 249         {"SpkN Out", NULL, "Speaker Mixer"},
 250         {"SpkP Out", NULL, "Speaker Mixer"},
 251         {"SPKOUTN", NULL, "SpkN Out"},
 252         {"SPKOUTP", NULL, "SpkP Out"},
 253
 254         /* Boost Mixer */
 255         {"ADC", NULL, "Boost Mixer"},
 256         {"Boost Mixer", "Aux Switch", "Aux Input"},
 257         {"Boost Mixer", NULL, "Input PGA"},
 258         {"Boost Mixer", NULL, "MICP"},
 259
 260         /* Input PGA */
 261         {"Input PGA", "Aux Switch", "Aux Input"},
 262         {"Input PGA", "MicN Switch", "MICN"},
 263         {"Input PGA", "MicP Switch", "MICP"},
 264
 265         /* Inputs */
 266         {"Aux Input", NULL, "AUX"},
 267 };
 268
 269 struct pll_ {
 270         unsigned int pre_div:1;
 271         unsigned int n:4;
 272         unsigned int k;
 273 };
 274
 275 /* The size in bits of the pll divide multiplied by 10
 276  * to allow rounding later */
 277 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 278
 279 static void pll_factors(struct pll_ *pll_div,
 280                         unsigned int target, unsigned int source)
 281 {
 282         unsigned long long Kpart;
 283         unsigned int K, Ndiv, Nmod;
 284
 285         /* There is a fixed divide by 4 in the output path */
 286         target *= 4;
 287
 288         Ndiv = target / source;
 289         if (Ndiv < 6) {
 290                 source /= 2;
 291                 pll_div->pre_div = 1;
 292                 Ndiv = target / source;
 293         } else
 294                 pll_div->pre_div = 0;
 295
 296         if ((Ndiv < 6) || (Ndiv > 12))
 297                 printk(KERN_WARNING
 298                         "WM8974 N value %u outwith recommended range!\n",
 299                         Ndiv);
 300
 301         pll_div->n = Ndiv;
 302         Nmod = target % source;
 303         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 304
 305         do_div(Kpart, source);
 306
 307         K = Kpart & 0xFFFFFFFF;
 308
 309         /* Check if we need to round */
 310         if ((K % 10) >= 5)
 311                 K += 5;
 312
 313         /* Move down to proper range now rounding is done */
 314         K /= 10;
 315
 316         pll_div->k = K;
 317 }
 318
 319 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 320                 int source, unsigned int freq_in, unsigned int freq_out)
 321 {
 322         struct snd_soc_codec *codec = codec_dai->codec;
 323         struct pll_ pll_div;
 324         u16 reg;
 325
 326         if (freq_in == 0 || freq_out == 0) {
 327                 /* Clock CODEC directly from MCLK */
 328                 reg = snd_soc_read(codec, WM8974_CLOCK);
 329                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 330
 331                 /* Turn off PLL */
 332                 reg = snd_soc_read(codec, WM8974_POWER1);
 333                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 334                 return 0;
 335         }
 336
 337         pll_factors(&pll_div, freq_out, freq_in);
 338
 339         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 340         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 341         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 342         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 343         reg = snd_soc_read(codec, WM8974_POWER1);
 344         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 345
 346         /* Run CODEC from PLL instead of MCLK */
 347         reg = snd_soc_read(codec, WM8974_CLOCK);
 348         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 349
 350         return 0;
 351 }
 352
 353 /*
 354  * Configure WM8974 clock dividers.
 355  */
 356 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 357                 int div_id, int div)
 358 {
 359         struct snd_soc_codec *codec = codec_dai->codec;
 360         u16 reg;
 361
 362         switch (div_id) {
 363         case WM8974_OPCLKDIV:
 364                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 365                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 366                 break;
 367         case WM8974_MCLKDIV:
 368                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 369                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 370                 break;
 371         case WM8974_BCLKDIV:
 372                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 373                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 374                 break;
 375         default:
 376                 return -EINVAL;
 377         }
 378
 379         return 0;
 380 }
 381
 382 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 383                 unsigned int fmt)
 384 {
 385         struct snd_soc_codec *codec = codec_dai->codec;
 386         u16 iface = 0;
 387         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 388
 389         /* set master/slave audio interface */
 390         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 391         case SND_SOC_DAIFMT_CBM_CFM:
 392                 clk |= 0x0001;
 393                 break;
 394         case SND_SOC_DAIFMT_CBS_CFS:
 395                 break;
 396         default:
 397                 return -EINVAL;
 398         }
 399
 400         /* interface format */
 401         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 402         case SND_SOC_DAIFMT_I2S:
 403                 iface |= 0x0010;
 404                 break;
 405         case SND_SOC_DAIFMT_RIGHT_J:
 406                 break;
 407         case SND_SOC_DAIFMT_LEFT_J:
 408                 iface |= 0x0008;
 409                 break;
 410         case SND_SOC_DAIFMT_DSP_A:
 411                 iface |= 0x00018;
 412                 break;
 413         default:
 414                 return -EINVAL;
 415         }
 416
 417         /* clock inversion */
 418         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 419         case SND_SOC_DAIFMT_NB_NF:
 420                 break;
 421         case SND_SOC_DAIFMT_IB_IF:
 422                 iface |= 0x0180;
 423                 break;
 424         case SND_SOC_DAIFMT_IB_NF:
 425                 iface |= 0x0100;
 426                 break;
 427         case SND_SOC_DAIFMT_NB_IF:
 428                 iface |= 0x0080;
 429                 break;
 430         default:
 431                 return -EINVAL;
 432         }
 433
 434         snd_soc_write(codec, WM8974_IFACE, iface);
 435         snd_soc_write(codec, WM8974_CLOCK, clk);
 436         return 0;
 437 }
 438
 439 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 440                                 struct snd_pcm_hw_params *params,
 441                                 struct snd_soc_dai *dai)
 442 {
 443         struct snd_soc_codec *codec = dai->codec;
 444         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 445         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 446
 447         /* bit size */
 448         switch (params_width(params)) {
 449         case 16:
 450                 break;
 451         case 20:
 452                 iface |= 0x0020;
 453                 break;
 454         case 24:
 455                 iface |= 0x0040;
 456                 break;
 457         case 32:
 458                 iface |= 0x0060;
 459                 break;
 460         }
 461
 462         /* filter coefficient */
 463         switch (params_rate(params)) {
 464         case 8000:
 465                 adn |= 0x5 << 1;
 466                 break;
 467         case 11025:
 468                 adn |= 0x4 << 1;
 469                 break;
 470         case 16000:
 471                 adn |= 0x3 << 1;
 472                 break;
 473         case 22050:
 474                 adn |= 0x2 << 1;
 475                 break;
 476         case 32000:
 477                 adn |= 0x1 << 1;
 478                 break;
 479         case 44100:
 480         case 48000:
 481                 break;
 482         }
 483
 484         snd_soc_write(codec, WM8974_IFACE, iface);
 485         snd_soc_write(codec, WM8974_ADD, adn);
 486         return 0;
 487 }
 488
 489 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 490 {
 491         struct snd_soc_codec *codec = dai->codec;
 492         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 493
 494         if (mute)
 495                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 496         else
 497                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 498         return 0;
 499 }
 500
 501 /* liam need to make this lower power with dapm */
 502 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 503         enum snd_soc_bias_level level)
 504 {
 505         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 506
 507         switch (level) {
 508         case SND_SOC_BIAS_ON:
 509         case SND_SOC_BIAS_PREPARE:
 510                 power1 |= 0x1;  /* VMID 50k */
 511                 snd_soc_write(codec, WM8974_POWER1, power1);
 512                 break;
 513
 514         case SND_SOC_BIAS_STANDBY:
 515                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 516
 517                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 518                         regcache_sync(dev_get_regmap(codec->dev, NULL));
 519
 520                         /* Initial cap charge at VMID 5k */
 521                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 522                         mdelay(100);
 523                 }
 524
 525                 power1 |= 0x2;  /* VMID 500k */
 526                 snd_soc_write(codec, WM8974_POWER1, power1);
 527                 break;
 528
 529         case SND_SOC_BIAS_OFF:
 530                 snd_soc_write(codec, WM8974_POWER1, 0);
 531                 snd_soc_write(codec, WM8974_POWER2, 0);
 532                 snd_soc_write(codec, WM8974_POWER3, 0);
 533                 break;
 534         }
 535
 536         return 0;
 537 }
 538
 539 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 540
 541 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 542         SNDRV_PCM_FMTBIT_S24_LE)
 543
 544 static const struct snd_soc_dai_ops wm8974_ops = {
 545         .hw_params = wm8974_pcm_hw_params,
 546         .digital_mute = wm8974_mute,
 547         .set_fmt = wm8974_set_dai_fmt,
 548         .set_clkdiv = wm8974_set_dai_clkdiv,
 549         .set_pll = wm8974_set_dai_pll,
 550 };
 551
 552 static struct snd_soc_dai_driver wm8974_dai = {
 553         .name = "wm8974-hifi",
 554         .playback = {
 555                 .stream_name = "Playback",
 556                 .channels_min = 1,
 557                 .channels_max = 2,   /* Only 1 channel of data */
 558                 .rates = WM8974_RATES,
 559                 .formats = WM8974_FORMATS,},
 560         .capture = {
 561                 .stream_name = "Capture",
 562                 .channels_min = 1,
 563                 .channels_max = 2,   /* Only 1 channel of data */
 564                 .rates = WM8974_RATES,
 565                 .formats = WM8974_FORMATS,},
 566         .ops = &wm8974_ops,
 567         .symmetric_rates = 1,
 568 };
 569
 570 static const struct regmap_config wm8974_regmap = {
 571         .reg_bits = 7,
 572         .val_bits = 9,
 573
 574         .max_register = WM8974_MONOMIX,
 575         .reg_defaults = wm8974_reg_defaults,
 576         .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
 577 };
 578
 579 static int wm8974_probe(struct snd_soc_codec *codec)
 580 {
 581         int ret = 0;
 582
 583         ret = wm8974_reset(codec);
 584         if (ret < 0) {
 585                 dev_err(codec->dev, "Failed to issue reset\n");
 586                 return ret;
 587         }
 588
 589         return 0;
 590 }
 591
 592 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
 593         .probe =        wm8974_probe,
 594         .set_bias_level = wm8974_set_bias_level,
 595         .suspend_bias_off = true,
 596
 597         .controls = wm8974_snd_controls,
 598         .num_controls = ARRAY_SIZE(wm8974_snd_controls),
 599         .dapm_widgets = wm8974_dapm_widgets,
 600         .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
 601         .dapm_routes = wm8974_dapm_routes,
 602         .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
 603 };
 604
 605 static int wm8974_i2c_probe(struct i2c_client *i2c,
 606                             const struct i2c_device_id *id)
 607 {
 608         struct regmap *regmap;
 609         int ret;
 610
 611         regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
 612         if (IS_ERR(regmap))
 613                 return PTR_ERR(regmap);
 614
 615         ret = snd_soc_register_codec(&i2c->dev,
 616                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
 617
 618         return ret;
 619 }
 620
 621 static int wm8974_i2c_remove(struct i2c_client *client)
 622 {
 623         snd_soc_unregister_codec(&client->dev);
 624
 625         return 0;
 626 }
 627
 628 static const struct i2c_device_id wm8974_i2c_id[] = {
 629         { "wm8974", 0 },
 630         { }
 631 };
 632 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 633
 634 static struct i2c_driver wm8974_i2c_driver = {
 635         .driver = {
 636                 .name = "wm8974",
 637                 .owner = THIS_MODULE,
 638         },
 639         .probe =    wm8974_i2c_probe,
 640         .remove =   wm8974_i2c_remove,
 641         .id_table = wm8974_i2c_id,
 642 };
 643
 644 module_i2c_driver(wm8974_i2c_driver);
 645
 646 MODULE_DESCRIPTION("ASoC WM8974 driver");
 647 MODULE_AUTHOR("Liam Girdwood");
 648 MODULE_LICENSE("GPL");