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 struct wm8974_priv {
  32         unsigned int mclk;
  33         unsigned int fs;
  34 };
  35
  36 static const struct reg_default wm8974_reg_defaults[] = {
  37         {  0, 0x0000 }, {  1, 0x0000 }, {  2, 0x0000 }, {  3, 0x0000 },
  38         {  4, 0x0050 }, {  5, 0x0000 }, {  6, 0x0140 }, {  7, 0x0000 },
  39         {  8, 0x0000 }, {  9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
  40         { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
  41         { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
  42         { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
  43         { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
  44         { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
  45         { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
  46         { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
  47         { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
  48         { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
  49         { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
  50         { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
  51         { 56, 0x0000 },
  52 };
  53
  54 #define WM8974_POWER1_BIASEN  0x08
  55 #define WM8974_POWER1_BUFIOEN 0x04
  56
  57 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
  58
  59 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  60 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  61 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  62 static const char *wm8974_bw[] = {"Narrow", "Wide" };
  63 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  64 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  65 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  66 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  67 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  68 static const char *wm8974_alc[] = {"ALC", "Limiter" };
  69
  70 static const struct soc_enum wm8974_enum[] = {
  71         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
  72         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
  73         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
  74         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
  75
  76         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
  77         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
  78         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
  79         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
  80
  81         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
  82         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
  83         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
  84         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
  85
  86         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
  87         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
  88 };
  89
  90 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  91
  92 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
  93                             WM8974_INPUT,  3, wm8974_auxmode_text);
  94
  95 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  96 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  97 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
  98 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
  99
 100 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 101
 102 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 103
 104 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 105 SOC_ENUM("ADC Companding", wm8974_enum[0]),
 106
 107 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 108 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 109
 110 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 111
 112 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 113 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 114 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 115
 116 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 117
 118 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 119 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 120 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 121
 122 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
 123 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 124 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 125
 126 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
 127 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 128 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 129
 130 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
 131 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 132 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 133
 134 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
 135 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 136 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 137
 138 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 139 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 140 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 141
 142 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 143 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 144
 145 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 146 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 147 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 148
 149 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 150 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 151 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 152
 153 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 154 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 155 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 156
 157 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 158 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 159
 160 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 161 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 162
 163 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 164 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 165 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 166
 167 SOC_ENUM("Aux Mode", wm8974_auxmode),
 168
 169 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 170 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 171
 172 /* DAC / ADC oversampling */
 173 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 174 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 175 };
 176
 177 /* Speaker Output Mixer */
 178 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 179 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 180 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 181 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 182 };
 183
 184 /* Mono Output Mixer */
 185 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 186 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 187 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 188 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 189 };
 190
 191 /* Boost mixer */
 192 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 193 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 194 };
 195
 196 /* Input PGA */
 197 static const struct snd_kcontrol_new wm8974_inpga[] = {
 198 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 199 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 200 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 201 };
 202
 203 /* AUX Input boost vol */
 204 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 205 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 206
 207 /* Mic Input boost vol */
 208 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 209 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 210
 211 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 212 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 213         &wm8974_speaker_mixer_controls[0],
 214         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 215 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 216         &wm8974_mono_mixer_controls[0],
 217         ARRAY_SIZE(wm8974_mono_mixer_controls)),
 218 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 219 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 220 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 221 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 222 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 223 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 224
 225 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 226                    ARRAY_SIZE(wm8974_inpga)),
 227 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 228                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 229
 230 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
 231
 232 SND_SOC_DAPM_INPUT("MICN"),
 233 SND_SOC_DAPM_INPUT("MICP"),
 234 SND_SOC_DAPM_INPUT("AUX"),
 235 SND_SOC_DAPM_OUTPUT("MONOOUT"),
 236 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 237 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 238 };
 239
 240 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
 241         /* Mono output mixer */
 242         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 243         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 244         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 245
 246         /* Speaker output mixer */
 247         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 248         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 249         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 250
 251         /* Outputs */
 252         {"Mono Out", NULL, "Mono Mixer"},
 253         {"MONOOUT", NULL, "Mono Out"},
 254         {"SpkN Out", NULL, "Speaker Mixer"},
 255         {"SpkP Out", NULL, "Speaker Mixer"},
 256         {"SPKOUTN", NULL, "SpkN Out"},
 257         {"SPKOUTP", NULL, "SpkP Out"},
 258
 259         /* Boost Mixer */
 260         {"ADC", NULL, "Boost Mixer"},
 261         {"Boost Mixer", "Aux Switch", "Aux Input"},
 262         {"Boost Mixer", NULL, "Input PGA"},
 263         {"Boost Mixer", NULL, "MICP"},
 264
 265         /* Input PGA */
 266         {"Input PGA", "Aux Switch", "Aux Input"},
 267         {"Input PGA", "MicN Switch", "MICN"},
 268         {"Input PGA", "MicP Switch", "MICP"},
 269
 270         /* Inputs */
 271         {"Aux Input", NULL, "AUX"},
 272 };
 273
 274 struct pll_ {
 275         unsigned int pre_div:1;
 276         unsigned int n:4;
 277         unsigned int k;
 278 };
 279
 280 /* The size in bits of the pll divide multiplied by 10
 281  * to allow rounding later */
 282 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 283
 284 static void pll_factors(struct pll_ *pll_div,
 285                         unsigned int target, unsigned int source)
 286 {
 287         unsigned long long Kpart;
 288         unsigned int K, Ndiv, Nmod;
 289
 290         /* There is a fixed divide by 4 in the output path */
 291         target *= 4;
 292
 293         Ndiv = target / source;
 294         if (Ndiv < 6) {
 295                 source /= 2;
 296                 pll_div->pre_div = 1;
 297                 Ndiv = target / source;
 298         } else
 299                 pll_div->pre_div = 0;
 300
 301         if ((Ndiv < 6) || (Ndiv > 12))
 302                 printk(KERN_WARNING
 303                         "WM8974 N value %u outwith recommended range!\n",
 304                         Ndiv);
 305
 306         pll_div->n = Ndiv;
 307         Nmod = target % source;
 308         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 309
 310         do_div(Kpart, source);
 311
 312         K = Kpart & 0xFFFFFFFF;
 313
 314         /* Check if we need to round */
 315         if ((K % 10) >= 5)
 316                 K += 5;
 317
 318         /* Move down to proper range now rounding is done */
 319         K /= 10;
 320
 321         pll_div->k = K;
 322 }
 323
 324 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 325                 int source, unsigned int freq_in, unsigned int freq_out)
 326 {
 327         struct snd_soc_codec *codec = codec_dai->codec;
 328         struct pll_ pll_div;
 329         u16 reg;
 330
 331         if (freq_in == 0 || freq_out == 0) {
 332                 /* Clock CODEC directly from MCLK */
 333                 reg = snd_soc_read(codec, WM8974_CLOCK);
 334                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 335
 336                 /* Turn off PLL */
 337                 reg = snd_soc_read(codec, WM8974_POWER1);
 338                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
 339                 return 0;
 340         }
 341
 342         pll_factors(&pll_div, freq_out, freq_in);
 343
 344         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
 345         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
 346         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
 347         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
 348         reg = snd_soc_read(codec, WM8974_POWER1);
 349         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 350
 351         /* Run CODEC from PLL instead of MCLK */
 352         reg = snd_soc_read(codec, WM8974_CLOCK);
 353         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 354
 355         return 0;
 356 }
 357
 358 /*
 359  * Configure WM8974 clock dividers.
 360  */
 361 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 362                 int div_id, int div)
 363 {
 364         struct snd_soc_codec *codec = codec_dai->codec;
 365         u16 reg;
 366
 367         switch (div_id) {
 368         case WM8974_OPCLKDIV:
 369                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
 370                 snd_soc_write(codec, WM8974_GPIO, reg | div);
 371                 break;
 372         case WM8974_MCLKDIV:
 373                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
 374                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 375                 break;
 376         case WM8974_BCLKDIV:
 377                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
 378                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
 379                 break;
 380         default:
 381                 return -EINVAL;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out,
 388                                        int *mclkdiv)
 389 {
 390         unsigned int ratio = 2 * f_in / f_out;
 391
 392         if (ratio <= 2) {
 393                 *mclkdiv = WM8974_MCLKDIV_1;
 394                 ratio = 2;
 395         } else if (ratio == 3) {
 396                 *mclkdiv = WM8974_MCLKDIV_1_5;
 397         } else if (ratio == 4) {
 398                 *mclkdiv = WM8974_MCLKDIV_2;
 399         } else if (ratio <= 6) {
 400                 *mclkdiv = WM8974_MCLKDIV_3;
 401                 ratio = 6;
 402         } else if (ratio <= 8) {
 403                 *mclkdiv = WM8974_MCLKDIV_4;
 404                 ratio = 8;
 405         } else if (ratio <= 12) {
 406                 *mclkdiv = WM8974_MCLKDIV_6;
 407                 ratio = 12;
 408         } else if (ratio <= 16) {
 409                 *mclkdiv = WM8974_MCLKDIV_8;
 410                 ratio = 16;
 411         } else {
 412                 *mclkdiv = WM8974_MCLKDIV_12;
 413                 ratio = 24;
 414         }
 415
 416         return f_out * ratio / 2;
 417 }
 418
 419 static int wm8974_update_clocks(struct snd_soc_dai *dai)
 420 {
 421         struct snd_soc_codec *codec = dai->codec;
 422         struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
 423         unsigned int fs256;
 424         unsigned int fpll = 0;
 425         unsigned int f;
 426         int mclkdiv;
 427
 428         if (!priv->mclk || !priv->fs)
 429                 return 0;
 430
 431         fs256 = 256 * priv->fs;
 432
 433         f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
 434
 435         if (f != priv->mclk) {
 436                 /* The PLL performs best around 90MHz */
 437                 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv);
 438         }
 439
 440         wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll);
 441         wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv);
 442
 443         return 0;
 444 }
 445
 446 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
 447                                  unsigned int freq, int dir)
 448 {
 449         struct snd_soc_codec *codec = dai->codec;
 450         struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
 451
 452         if (dir != SND_SOC_CLOCK_IN)
 453                 return -EINVAL;
 454
 455         priv->mclk = freq;
 456
 457         return wm8974_update_clocks(dai);
 458 }
 459
 460 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 461                 unsigned int fmt)
 462 {
 463         struct snd_soc_codec *codec = codec_dai->codec;
 464         u16 iface = 0;
 465         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 466
 467         /* set master/slave audio interface */
 468         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 469         case SND_SOC_DAIFMT_CBM_CFM:
 470                 clk |= 0x0001;
 471                 break;
 472         case SND_SOC_DAIFMT_CBS_CFS:
 473                 break;
 474         default:
 475                 return -EINVAL;
 476         }
 477
 478         /* interface format */
 479         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 480         case SND_SOC_DAIFMT_I2S:
 481                 iface |= 0x0010;
 482                 break;
 483         case SND_SOC_DAIFMT_RIGHT_J:
 484                 break;
 485         case SND_SOC_DAIFMT_LEFT_J:
 486                 iface |= 0x0008;
 487                 break;
 488         case SND_SOC_DAIFMT_DSP_A:
 489                 iface |= 0x00018;
 490                 break;
 491         default:
 492                 return -EINVAL;
 493         }
 494
 495         /* clock inversion */
 496         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 497         case SND_SOC_DAIFMT_NB_NF:
 498                 break;
 499         case SND_SOC_DAIFMT_IB_IF:
 500                 iface |= 0x0180;
 501                 break;
 502         case SND_SOC_DAIFMT_IB_NF:
 503                 iface |= 0x0100;
 504                 break;
 505         case SND_SOC_DAIFMT_NB_IF:
 506                 iface |= 0x0080;
 507                 break;
 508         default:
 509                 return -EINVAL;
 510         }
 511
 512         snd_soc_write(codec, WM8974_IFACE, iface);
 513         snd_soc_write(codec, WM8974_CLOCK, clk);
 514         return 0;
 515 }
 516
 517 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
 518                                 struct snd_pcm_hw_params *params,
 519                                 struct snd_soc_dai *dai)
 520 {
 521         struct snd_soc_codec *codec = dai->codec;
 522         struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
 523         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
 524         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 525         int err;
 526
 527         priv->fs = params_rate(params);
 528         err = wm8974_update_clocks(dai);
 529         if (err)
 530                 return err;
 531
 532         /* bit size */
 533         switch (params_width(params)) {
 534         case 16:
 535                 break;
 536         case 20:
 537                 iface |= 0x0020;
 538                 break;
 539         case 24:
 540                 iface |= 0x0040;
 541                 break;
 542         case 32:
 543                 iface |= 0x0060;
 544                 break;
 545         }
 546
 547         /* filter coefficient */
 548         switch (params_rate(params)) {
 549         case 8000:
 550                 adn |= 0x5 << 1;
 551                 break;
 552         case 11025:
 553                 adn |= 0x4 << 1;
 554                 break;
 555         case 16000:
 556                 adn |= 0x3 << 1;
 557                 break;
 558         case 22050:
 559                 adn |= 0x2 << 1;
 560                 break;
 561         case 32000:
 562                 adn |= 0x1 << 1;
 563                 break;
 564         case 44100:
 565         case 48000:
 566                 break;
 567         }
 568
 569         snd_soc_write(codec, WM8974_IFACE, iface);
 570         snd_soc_write(codec, WM8974_ADD, adn);
 571         return 0;
 572 }
 573
 574 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 575 {
 576         struct snd_soc_codec *codec = dai->codec;
 577         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 578
 579         if (mute)
 580                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
 581         else
 582                 snd_soc_write(codec, WM8974_DAC, mute_reg);
 583         return 0;
 584 }
 585
 586 /* liam need to make this lower power with dapm */
 587 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 588         enum snd_soc_bias_level level)
 589 {
 590         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 591
 592         switch (level) {
 593         case SND_SOC_BIAS_ON:
 594         case SND_SOC_BIAS_PREPARE:
 595                 power1 |= 0x1;  /* VMID 50k */
 596                 snd_soc_write(codec, WM8974_POWER1, power1);
 597                 break;
 598
 599         case SND_SOC_BIAS_STANDBY:
 600                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
 601
 602                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 603                         regcache_sync(dev_get_regmap(codec->dev, NULL));
 604
 605                         /* Initial cap charge at VMID 5k */
 606                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
 607                         mdelay(100);
 608                 }
 609
 610                 power1 |= 0x2;  /* VMID 500k */
 611                 snd_soc_write(codec, WM8974_POWER1, power1);
 612                 break;
 613
 614         case SND_SOC_BIAS_OFF:
 615                 snd_soc_write(codec, WM8974_POWER1, 0);
 616                 snd_soc_write(codec, WM8974_POWER2, 0);
 617                 snd_soc_write(codec, WM8974_POWER3, 0);
 618                 break;
 619         }
 620
 621         return 0;
 622 }
 623
 624 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
 625
 626 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 627         SNDRV_PCM_FMTBIT_S24_LE)
 628
 629 static const struct snd_soc_dai_ops wm8974_ops = {
 630         .hw_params = wm8974_pcm_hw_params,
 631         .digital_mute = wm8974_mute,
 632         .set_fmt = wm8974_set_dai_fmt,
 633         .set_clkdiv = wm8974_set_dai_clkdiv,
 634         .set_pll = wm8974_set_dai_pll,
 635         .set_sysclk = wm8974_set_dai_sysclk,
 636 };
 637
 638 static struct snd_soc_dai_driver wm8974_dai = {
 639         .name = "wm8974-hifi",
 640         .playback = {
 641                 .stream_name = "Playback",
 642                 .channels_min = 1,
 643                 .channels_max = 2,   /* Only 1 channel of data */
 644                 .rates = WM8974_RATES,
 645                 .formats = WM8974_FORMATS,},
 646         .capture = {
 647                 .stream_name = "Capture",
 648                 .channels_min = 1,
 649                 .channels_max = 2,   /* Only 1 channel of data */
 650                 .rates = WM8974_RATES,
 651                 .formats = WM8974_FORMATS,},
 652         .ops = &wm8974_ops,
 653         .symmetric_rates = 1,
 654 };
 655
 656 static const struct regmap_config wm8974_regmap = {
 657         .reg_bits = 7,
 658         .val_bits = 9,
 659
 660         .max_register = WM8974_MONOMIX,
 661         .reg_defaults = wm8974_reg_defaults,
 662         .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
 663         .cache_type = REGCACHE_FLAT,
 664 };
 665
 666 static int wm8974_probe(struct snd_soc_codec *codec)
 667 {
 668         int ret = 0;
 669
 670         ret = wm8974_reset(codec);
 671         if (ret < 0) {
 672                 dev_err(codec->dev, "Failed to issue reset\n");
 673                 return ret;
 674         }
 675
 676         return 0;
 677 }
 678
 679 static const struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
 680         .probe =        wm8974_probe,
 681         .set_bias_level = wm8974_set_bias_level,
 682         .suspend_bias_off = true,
 683
 684         .component_driver = {
 685                 .controls               = wm8974_snd_controls,
 686                 .num_controls           = ARRAY_SIZE(wm8974_snd_controls),
 687                 .dapm_widgets           = wm8974_dapm_widgets,
 688                 .num_dapm_widgets       = ARRAY_SIZE(wm8974_dapm_widgets),
 689                 .dapm_routes            = wm8974_dapm_routes,
 690                 .num_dapm_routes        = ARRAY_SIZE(wm8974_dapm_routes),
 691         },
 692 };
 693
 694 static int wm8974_i2c_probe(struct i2c_client *i2c,
 695                             const struct i2c_device_id *id)
 696 {
 697         struct wm8974_priv *priv;
 698         struct regmap *regmap;
 699         int ret;
 700
 701         priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
 702         if (!priv)
 703                 return -ENOMEM;
 704
 705         i2c_set_clientdata(i2c, priv);
 706
 707         regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
 708         if (IS_ERR(regmap))
 709                 return PTR_ERR(regmap);
 710
 711         ret = snd_soc_register_codec(&i2c->dev,
 712                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
 713
 714         return ret;
 715 }
 716
 717 static int wm8974_i2c_remove(struct i2c_client *client)
 718 {
 719         snd_soc_unregister_codec(&client->dev);
 720
 721         return 0;
 722 }
 723
 724 static const struct i2c_device_id wm8974_i2c_id[] = {
 725         { "wm8974", 0 },
 726         { }
 727 };
 728 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 729
 730 static const struct of_device_id wm8974_of_match[] = {
 731        { .compatible = "wlf,wm8974", },
 732        { }
 733 };
 734 MODULE_DEVICE_TABLE(of, wm8974_of_match);
 735
 736 static struct i2c_driver wm8974_i2c_driver = {
 737         .driver = {
 738                 .name = "wm8974",
 739                 .of_match_table = wm8974_of_match,
 740         },
 741         .probe =    wm8974_i2c_probe,
 742         .remove =   wm8974_i2c_remove,
 743         .id_table = wm8974_i2c_id,
 744 };
 745
 746 module_i2c_driver(wm8974_i2c_driver);
 747
 748 MODULE_DESCRIPTION("ASoC WM8974 driver");
 749 MODULE_AUTHOR("Liam Girdwood");
 750 MODULE_LICENSE("GPL");