linux/sound/soc/codecs/wm8974.c
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   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
  31struct wm8974_priv {
  32        unsigned int mclk;
  33        unsigned int fs;
  34};
  35
  36static 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
  59static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
  60static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
  61static const char *wm8974_eqmode[] = {"Capture", "Playback" };
  62static const char *wm8974_bw[] = {"Narrow", "Wide" };
  63static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
  64static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
  65static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
  66static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
  67static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
  68static const char *wm8974_alc[] = {"ALC", "Limiter" };
  69
  70static 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
  90static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
  91
  92static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
  93                            WM8974_INPUT,  3, wm8974_auxmode_text);
  94
  95static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
  96static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
  97static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
  98static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
  99
 100static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 101
 102SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 103
 104SOC_ENUM("DAC Companding", wm8974_enum[1]),
 105SOC_ENUM("ADC Companding", wm8974_enum[0]),
 106
 107SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
 108SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
 109
 110SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
 111
 112SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
 113SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
 114SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
 115
 116SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
 117
 118SOC_ENUM("Equaliser Function", wm8974_enum[3]),
 119SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
 120SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
 121
 122SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
 123SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
 124SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
 125
 126SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
 127SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
 128SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
 129
 130SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
 131SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
 132SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
 133
 134SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
 135SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
 136SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
 137
 138SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
 139SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
 140SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
 141
 142SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
 143SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
 144
 145SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
 146SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
 147SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
 148
 149SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
 150SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
 151SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
 152
 153SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
 154SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
 155SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
 156
 157SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
 158SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
 159
 160SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
 161SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
 162
 163SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
 164SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
 165SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
 166
 167SOC_ENUM("Aux Mode", wm8974_auxmode),
 168
 169SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
 170SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
 171
 172/* DAC / ADC oversampling */
 173SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
 174SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
 175};
 176
 177/* Speaker Output Mixer */
 178static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
 179SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
 180SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
 181SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
 182};
 183
 184/* Mono Output Mixer */
 185static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
 186SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
 187SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
 188SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
 189};
 190
 191/* Boost mixer */
 192static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
 193SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
 194};
 195
 196/* Input PGA */
 197static const struct snd_kcontrol_new wm8974_inpga[] = {
 198SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
 199SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
 200SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
 201};
 202
 203/* AUX Input boost vol */
 204static const struct snd_kcontrol_new wm8974_aux_boost_controls =
 205SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
 206
 207/* Mic Input boost vol */
 208static const struct snd_kcontrol_new wm8974_mic_boost_controls =
 209SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
 210
 211static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
 212SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
 213        &wm8974_speaker_mixer_controls[0],
 214        ARRAY_SIZE(wm8974_speaker_mixer_controls)),
 215SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
 216        &wm8974_mono_mixer_controls[0],
 217        ARRAY_SIZE(wm8974_mono_mixer_controls)),
 218SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
 219SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
 220SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
 221SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
 222SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
 223SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
 224
 225SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
 226                   ARRAY_SIZE(wm8974_inpga)),
 227SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
 228                   wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
 229
 230SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
 231
 232SND_SOC_DAPM_INPUT("MICN"),
 233SND_SOC_DAPM_INPUT("MICP"),
 234SND_SOC_DAPM_INPUT("AUX"),
 235SND_SOC_DAPM_OUTPUT("MONOOUT"),
 236SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 237SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 238};
 239
 240static 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
 274struct 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
 284static 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
 324static 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 */
 361static 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
 387static 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
 419static 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
 446static 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
 460static 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
 517static 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
 574static 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 */
 587static 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
 629static 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
 638static 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
 656static 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
 666static 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
 679static 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
 694static 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
 717static int wm8974_i2c_remove(struct i2c_client *client)
 718{
 719        snd_soc_unregister_codec(&client->dev);
 720
 721        return 0;
 722}
 723
 724static const struct i2c_device_id wm8974_i2c_id[] = {
 725        { "wm8974", 0 },
 726        { }
 727};
 728MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 729
 730static const struct of_device_id wm8974_of_match[] = {
 731       { .compatible = "wlf,wm8974", },
 732       { }
 733};
 734MODULE_DEVICE_TABLE(of, wm8974_of_match);
 735
 736static 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
 746module_i2c_driver(wm8974_i2c_driver);
 747
 748MODULE_DESCRIPTION("ASoC WM8974 driver");
 749MODULE_AUTHOR("Liam Girdwood");
 750MODULE_LICENSE("GPL");
 751