sound/soc/codecs/wm8940.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8940.c  --  WM8940 ALSA Soc Audio driver
   4  *
   5  * Author: Jonathan Cameron <jic23@cam.ac.uk>
   6  *
   7  * Based on wm8510.c
   8  *    Copyright  2006 Wolfson Microelectronics PLC.
   9  *    Author:  Liam Girdwood <lrg@slimlogic.co.uk>
  10  *
  11  * Not currently handled:
  12  * Notch filter control
  13  * AUXMode (inverting vs mixer)
  14  * No means to obtain current gain if alc enabled.
  15  * No use made of gpio
  16  * Fast VMID discharge for power down
  17  * Soft Start
  18  * DLR and ALR Swaps not enabled
  19  * Digital Sidetone not supported
  20  */
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/kernel.h>
  24 #include <linux/init.h>
  25 #include <linux/delay.h>
  26 #include <linux/pm.h>
  27 #include <linux/i2c.h>
  28 #include <linux/regmap.h>
  29 #include <linux/slab.h>
  30 #include <sound/core.h>
  31 #include <sound/pcm.h>
  32 #include <sound/pcm_params.h>
  33 #include <sound/soc.h>
  34 #include <sound/initval.h>
  35 #include <sound/tlv.h>
  36
  37 #include "wm8940.h"
  38
  39 struct wm8940_priv {
  40         unsigned int sysclk;
  41         struct regmap *regmap;
  42 };
  43
  44 static bool wm8940_volatile_register(struct device *dev, unsigned int reg)
  45 {
  46         switch (reg) {
  47         case WM8940_SOFTRESET:
  48                 return true;
  49         default:
  50                 return false;
  51         }
  52 }
  53
  54 static bool wm8940_readable_register(struct device *dev, unsigned int reg)
  55 {
  56         switch (reg) {
  57         case WM8940_SOFTRESET:
  58         case WM8940_POWER1:
  59         case WM8940_POWER2:
  60         case WM8940_POWER3:
  61         case WM8940_IFACE:
  62         case WM8940_COMPANDINGCTL:
  63         case WM8940_CLOCK:
  64         case WM8940_ADDCNTRL:
  65         case WM8940_GPIO:
  66         case WM8940_CTLINT:
  67         case WM8940_DAC:
  68         case WM8940_DACVOL:
  69         case WM8940_ADC:
  70         case WM8940_ADCVOL:
  71         case WM8940_NOTCH1:
  72         case WM8940_NOTCH2:
  73         case WM8940_NOTCH3:
  74         case WM8940_NOTCH4:
  75         case WM8940_NOTCH5:
  76         case WM8940_NOTCH6:
  77         case WM8940_NOTCH7:
  78         case WM8940_NOTCH8:
  79         case WM8940_DACLIM1:
  80         case WM8940_DACLIM2:
  81         case WM8940_ALC1:
  82         case WM8940_ALC2:
  83         case WM8940_ALC3:
  84         case WM8940_NOISEGATE:
  85         case WM8940_PLLN:
  86         case WM8940_PLLK1:
  87         case WM8940_PLLK2:
  88         case WM8940_PLLK3:
  89         case WM8940_ALC4:
  90         case WM8940_INPUTCTL:
  91         case WM8940_PGAGAIN:
  92         case WM8940_ADCBOOST:
  93         case WM8940_OUTPUTCTL:
  94         case WM8940_SPKMIX:
  95         case WM8940_SPKVOL:
  96         case WM8940_MONOMIX:
  97                 return true;
  98         default:
  99                 return false;
 100         }
 101 }
 102
 103 static const struct reg_default wm8940_reg_defaults[] = {
 104         {  0x1, 0x0000 }, /* Power 1 */
 105         {  0x2, 0x0000 }, /* Power 2 */
 106         {  0x3, 0x0000 }, /* Power 3 */
 107         {  0x4, 0x0010 }, /* Interface Control */
 108         {  0x5, 0x0000 }, /* Companding Control */
 109         {  0x6, 0x0140 }, /* Clock Control */
 110         {  0x7, 0x0000 }, /* Additional Controls */
 111         {  0x8, 0x0000 }, /* GPIO Control */
 112         {  0x9, 0x0002 }, /* Auto Increment Control */
 113         {  0xa, 0x0000 }, /* DAC Control */
 114         {  0xb, 0x00FF }, /* DAC Volume */
 115
 116         {  0xe, 0x0100 }, /* ADC Control */
 117         {  0xf, 0x00FF }, /* ADC Volume */
 118         { 0x10, 0x0000 }, /* Notch Filter 1 Control 1 */
 119         { 0x11, 0x0000 }, /* Notch Filter 1 Control 2 */
 120         { 0x12, 0x0000 }, /* Notch Filter 2 Control 1 */
 121         { 0x13, 0x0000 }, /* Notch Filter 2 Control 2 */
 122         { 0x14, 0x0000 }, /* Notch Filter 3 Control 1 */
 123         { 0x15, 0x0000 }, /* Notch Filter 3 Control 2 */
 124         { 0x16, 0x0000 }, /* Notch Filter 4 Control 1 */
 125         { 0x17, 0x0000 }, /* Notch Filter 4 Control 2 */
 126         { 0x18, 0x0032 }, /* DAC Limit Control 1 */
 127         { 0x19, 0x0000 }, /* DAC Limit Control 2 */
 128
 129         { 0x20, 0x0038 }, /* ALC Control 1 */
 130         { 0x21, 0x000B }, /* ALC Control 2 */
 131         { 0x22, 0x0032 }, /* ALC Control 3 */
 132         { 0x23, 0x0000 }, /* Noise Gate */
 133         { 0x24, 0x0041 }, /* PLLN */
 134         { 0x25, 0x000C }, /* PLLK1 */
 135         { 0x26, 0x0093 }, /* PLLK2 */
 136         { 0x27, 0x00E9 }, /* PLLK3 */
 137
 138         { 0x2a, 0x0030 }, /* ALC Control 4 */
 139
 140         { 0x2c, 0x0002 }, /* Input Control */
 141         { 0x2d, 0x0050 }, /* PGA Gain */
 142
 143         { 0x2f, 0x0002 }, /* ADC Boost Control */
 144
 145         { 0x31, 0x0002 }, /* Output Control */
 146         { 0x32, 0x0000 }, /* Speaker Mixer Control */
 147
 148         { 0x36, 0x0079 }, /* Speaker Volume */
 149
 150         { 0x38, 0x0000 }, /* Mono Mixer Control */
 151 };
 152
 153 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
 154 static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum,
 155                             WM8940_COMPANDINGCTL, 1, wm8940_companding);
 156 static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum,
 157                             WM8940_COMPANDINGCTL, 3, wm8940_companding);
 158
 159 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
 160 static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum,
 161                             WM8940_ALC3, 8, wm8940_alc_mode_text);
 162
 163 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
 164 static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum,
 165                             WM8940_INPUTCTL, 8, wm8940_mic_bias_level_text);
 166
 167 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
 168 static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum,
 169                             WM8940_ADC, 7, wm8940_filter_mode_text);
 170
 171 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
 172 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
 173 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
 174 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
 175 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
 176 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
 177 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
 178 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
 179 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
 180 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
 181
 182 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
 183         SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
 184                    6, 1, 0),
 185         SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
 186         SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
 187
 188         SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
 189         SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
 190         SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
 191                        3, 7, 1, wm8940_alc_max_tlv),
 192         SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
 193                        0, 7, 0, wm8940_alc_min_tlv),
 194         SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
 195                        0, 14, 0, wm8940_alc_tar_tlv),
 196         SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
 197         SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
 198         SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
 199         SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
 200         SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
 201                    3, 1, 0),
 202         SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
 203                    0, 7, 0),
 204
 205         SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
 206         SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
 207         SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
 208         SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
 209                        4, 9, 1, wm8940_lim_thresh_tlv),
 210         SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
 211                        0, 12, 0, wm8940_lim_boost_tlv),
 212
 213         SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
 214         SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
 215                        0, 63, 0, wm8940_pga_vol_tlv),
 216         SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
 217                        0, 255, 0, wm8940_adc_tlv),
 218         SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
 219                        0, 255, 0, wm8940_adc_tlv),
 220         SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
 221         SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
 222                        8, 1, 0, wm8940_capture_boost_vol_tlv),
 223         SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
 224                        0, 63, 0, wm8940_spk_vol_tlv),
 225         SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL,  6, 1, 1),
 226
 227         SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
 228                        8, 1, 1, wm8940_att_tlv),
 229         SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
 230
 231         SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
 232         SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
 233                        7, 1, 1, wm8940_att_tlv),
 234
 235         SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
 236         SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
 237         SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
 238         SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
 239         SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
 240         SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
 241         SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
 242 };
 243
 244 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
 245         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
 246         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
 247         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
 248 };
 249
 250 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
 251         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
 252         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
 253         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
 254 };
 255
 256 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
 257 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
 258         SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
 259         SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
 260                             0, 7, 0, wm8940_boost_vol_tlv),
 261         SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
 262                             4, 7, 0, wm8940_boost_vol_tlv),
 263 };
 264
 265 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
 266         SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
 267         SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
 268         SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
 269 };
 270
 271 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
 272         SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
 273                            &wm8940_speaker_mixer_controls[0],
 274                            ARRAY_SIZE(wm8940_speaker_mixer_controls)),
 275         SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
 276                            &wm8940_mono_mixer_controls[0],
 277                            ARRAY_SIZE(wm8940_mono_mixer_controls)),
 278         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
 279
 280         SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
 281         SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
 282         SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
 283         SND_SOC_DAPM_OUTPUT("MONOOUT"),
 284         SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 285         SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 286
 287         SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
 288         SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
 289         SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
 290                            &wm8940_micpga_controls[0],
 291                            ARRAY_SIZE(wm8940_micpga_controls)),
 292         SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
 293                            &wm8940_input_boost_controls[0],
 294                            ARRAY_SIZE(wm8940_input_boost_controls)),
 295         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
 296
 297         SND_SOC_DAPM_INPUT("MICN"),
 298         SND_SOC_DAPM_INPUT("MICP"),
 299         SND_SOC_DAPM_INPUT("AUX"),
 300 };
 301
 302 static const struct snd_soc_dapm_route wm8940_dapm_routes[] = {
 303         /* Mono output mixer */
 304         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 305         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 306         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 307
 308         /* Speaker output mixer */
 309         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 310         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 311         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 312
 313         /* Outputs */
 314         {"Mono Out", NULL, "Mono Mixer"},
 315         {"MONOOUT", NULL, "Mono Out"},
 316         {"SpkN Out", NULL, "Speaker Mixer"},
 317         {"SpkP Out", NULL, "Speaker Mixer"},
 318         {"SPKOUTN", NULL, "SpkN Out"},
 319         {"SPKOUTP", NULL, "SpkP Out"},
 320
 321         /*  Microphone PGA */
 322         {"Mic PGA", "MICN Switch", "MICN"},
 323         {"Mic PGA", "MICP Switch", "MICP"},
 324         {"Mic PGA", "AUX Switch", "AUX"},
 325
 326         /* Boost Mixer */
 327         {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
 328         {"Boost Mixer", "Mic Volume",  "MICP"},
 329         {"Boost Mixer", "Aux Volume", "Aux Input"},
 330
 331         {"ADC", NULL, "Boost Mixer"},
 332 };
 333
 334 #define wm8940_reset(c) snd_soc_component_write(c, WM8940_SOFTRESET, 0);
 335
 336 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
 337                               unsigned int fmt)
 338 {
 339         struct snd_soc_component *component = codec_dai->component;
 340         u16 iface = snd_soc_component_read32(component, WM8940_IFACE) & 0xFE67;
 341         u16 clk = snd_soc_component_read32(component, WM8940_CLOCK) & 0x1fe;
 342
 343         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 344         case SND_SOC_DAIFMT_CBM_CFM:
 345                 clk |= 1;
 346                 break;
 347         case SND_SOC_DAIFMT_CBS_CFS:
 348                 break;
 349         default:
 350                 return -EINVAL;
 351         }
 352         snd_soc_component_write(component, WM8940_CLOCK, clk);
 353
 354         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 355         case SND_SOC_DAIFMT_I2S:
 356                 iface |= (2 << 3);
 357                 break;
 358         case SND_SOC_DAIFMT_LEFT_J:
 359                 iface |= (1 << 3);
 360                 break;
 361         case SND_SOC_DAIFMT_RIGHT_J:
 362                 break;
 363         case SND_SOC_DAIFMT_DSP_A:
 364                 iface |= (3 << 3);
 365                 break;
 366         case SND_SOC_DAIFMT_DSP_B:
 367                 iface |= (3 << 3) | (1 << 7);
 368                 break;
 369         }
 370
 371         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 372         case SND_SOC_DAIFMT_NB_NF:
 373                 break;
 374         case SND_SOC_DAIFMT_NB_IF:
 375                 iface |= (1 << 7);
 376                 break;
 377         case SND_SOC_DAIFMT_IB_NF:
 378                 iface |= (1 << 8);
 379                 break;
 380         case SND_SOC_DAIFMT_IB_IF:
 381                 iface |= (1 << 8) | (1 << 7);
 382                 break;
 383         }
 384
 385         snd_soc_component_write(component, WM8940_IFACE, iface);
 386
 387         return 0;
 388 }
 389
 390 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
 391                                 struct snd_pcm_hw_params *params,
 392                                 struct snd_soc_dai *dai)
 393 {
 394         struct snd_soc_component *component = dai->component;
 395         u16 iface = snd_soc_component_read32(component, WM8940_IFACE) & 0xFD9F;
 396         u16 addcntrl = snd_soc_component_read32(component, WM8940_ADDCNTRL) & 0xFFF1;
 397         u16 companding =  snd_soc_component_read32(component,
 398                                                 WM8940_COMPANDINGCTL) & 0xFFDF;
 399         int ret;
 400
 401         /* LoutR control */
 402         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
 403             && params_channels(params) == 2)
 404                 iface |= (1 << 9);
 405
 406         switch (params_rate(params)) {
 407         case 8000:
 408                 addcntrl |= (0x5 << 1);
 409                 break;
 410         case 11025:
 411                 addcntrl |= (0x4 << 1);
 412                 break;
 413         case 16000:
 414                 addcntrl |= (0x3 << 1);
 415                 break;
 416         case 22050:
 417                 addcntrl |= (0x2 << 1);
 418                 break;
 419         case 32000:
 420                 addcntrl |= (0x1 << 1);
 421                 break;
 422         case 44100:
 423         case 48000:
 424                 break;
 425         }
 426         ret = snd_soc_component_write(component, WM8940_ADDCNTRL, addcntrl);
 427         if (ret)
 428                 goto error_ret;
 429
 430         switch (params_width(params)) {
 431         case 8:
 432                 companding = companding | (1 << 5);
 433                 break;
 434         case 16:
 435                 break;
 436         case 20:
 437                 iface |= (1 << 5);
 438                 break;
 439         case 24:
 440                 iface |= (2 << 5);
 441                 break;
 442         case 32:
 443                 iface |= (3 << 5);
 444                 break;
 445         }
 446         ret = snd_soc_component_write(component, WM8940_COMPANDINGCTL, companding);
 447         if (ret)
 448                 goto error_ret;
 449         ret = snd_soc_component_write(component, WM8940_IFACE, iface);
 450
 451 error_ret:
 452         return ret;
 453 }
 454
 455 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
 456 {
 457         struct snd_soc_component *component = dai->component;
 458         u16 mute_reg = snd_soc_component_read32(component, WM8940_DAC) & 0xffbf;
 459
 460         if (mute)
 461                 mute_reg |= 0x40;
 462
 463         return snd_soc_component_write(component, WM8940_DAC, mute_reg);
 464 }
 465
 466 static int wm8940_set_bias_level(struct snd_soc_component *component,
 467                                  enum snd_soc_bias_level level)
 468 {
 469         struct wm8940_priv *wm8940 = snd_soc_component_get_drvdata(component);
 470         u16 val;
 471         u16 pwr_reg = snd_soc_component_read32(component, WM8940_POWER1) & 0x1F0;
 472         int ret = 0;
 473
 474         switch (level) {
 475         case SND_SOC_BIAS_ON:
 476                 /* ensure bufioen and biasen */
 477                 pwr_reg |= (1 << 2) | (1 << 3);
 478                 /* Enable thermal shutdown */
 479                 val = snd_soc_component_read32(component, WM8940_OUTPUTCTL);
 480                 ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, val | 0x2);
 481                 if (ret)
 482                         break;
 483                 /* set vmid to 75k */
 484                 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x1);
 485                 break;
 486         case SND_SOC_BIAS_PREPARE:
 487                 /* ensure bufioen and biasen */
 488                 pwr_reg |= (1 << 2) | (1 << 3);
 489                 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x1);
 490                 break;
 491         case SND_SOC_BIAS_STANDBY:
 492                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
 493                         ret = regcache_sync(wm8940->regmap);
 494                         if (ret < 0) {
 495                                 dev_err(component->dev, "Failed to sync cache: %d\n", ret);
 496                                 return ret;
 497                         }
 498                 }
 499
 500                 /* ensure bufioen and biasen */
 501                 pwr_reg |= (1 << 2) | (1 << 3);
 502                 /* set vmid to 300k for standby */
 503                 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x2);
 504                 break;
 505         case SND_SOC_BIAS_OFF:
 506                 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg);
 507                 break;
 508         }
 509
 510         return ret;
 511 }
 512
 513 struct pll_ {
 514         unsigned int pre_scale:2;
 515         unsigned int n:4;
 516         unsigned int k;
 517 };
 518
 519 static struct pll_ pll_div;
 520
 521 /* The size in bits of the pll divide multiplied by 10
 522  * to allow rounding later */
 523 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 524 static void pll_factors(unsigned int target, unsigned int source)
 525 {
 526         unsigned long long Kpart;
 527         unsigned int K, Ndiv, Nmod;
 528         /* The left shift ist to avoid accuracy loss when right shifting */
 529         Ndiv = target / source;
 530
 531         if (Ndiv > 12) {
 532                 source <<= 1;
 533                 /* Multiply by 2 */
 534                 pll_div.pre_scale = 0;
 535                 Ndiv = target / source;
 536         } else if (Ndiv < 3) {
 537                 source >>= 2;
 538                 /* Divide by 4 */
 539                 pll_div.pre_scale = 3;
 540                 Ndiv = target / source;
 541         } else if (Ndiv < 6) {
 542                 source >>= 1;
 543                 /* divide by 2 */
 544                 pll_div.pre_scale = 2;
 545                 Ndiv = target / source;
 546         } else
 547                 pll_div.pre_scale = 1;
 548
 549         if ((Ndiv < 6) || (Ndiv > 12))
 550                 printk(KERN_WARNING
 551                         "WM8940 N value %d outwith recommended range!d\n",
 552                         Ndiv);
 553
 554         pll_div.n = Ndiv;
 555         Nmod = target % source;
 556         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 557
 558         do_div(Kpart, source);
 559
 560         K = Kpart & 0xFFFFFFFF;
 561
 562         /* Check if we need to round */
 563         if ((K % 10) >= 5)
 564                 K += 5;
 565
 566         /* Move down to proper range now rounding is done */
 567         K /= 10;
 568
 569         pll_div.k = K;
 570 }
 571
 572 /* Untested at the moment */
 573 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 574                 int source, unsigned int freq_in, unsigned int freq_out)
 575 {
 576         struct snd_soc_component *component = codec_dai->component;
 577         u16 reg;
 578
 579         /* Turn off PLL */
 580         reg = snd_soc_component_read32(component, WM8940_POWER1);
 581         snd_soc_component_write(component, WM8940_POWER1, reg & 0x1df);
 582
 583         if (freq_in == 0 || freq_out == 0) {
 584                 /* Clock CODEC directly from MCLK */
 585                 reg = snd_soc_component_read32(component, WM8940_CLOCK);
 586                 snd_soc_component_write(component, WM8940_CLOCK, reg & 0x0ff);
 587                 /* Pll power down */
 588                 snd_soc_component_write(component, WM8940_PLLN, (1 << 7));
 589                 return 0;
 590         }
 591
 592         /* Pll is followed by a frequency divide by 4 */
 593         pll_factors(freq_out*4, freq_in);
 594         if (pll_div.k)
 595                 snd_soc_component_write(component, WM8940_PLLN,
 596                              (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
 597         else /* No factional component */
 598                 snd_soc_component_write(component, WM8940_PLLN,
 599                              (pll_div.pre_scale << 4) | pll_div.n);
 600         snd_soc_component_write(component, WM8940_PLLK1, pll_div.k >> 18);
 601         snd_soc_component_write(component, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
 602         snd_soc_component_write(component, WM8940_PLLK3, pll_div.k & 0x1ff);
 603         /* Enable the PLL */
 604         reg = snd_soc_component_read32(component, WM8940_POWER1);
 605         snd_soc_component_write(component, WM8940_POWER1, reg | 0x020);
 606
 607         /* Run CODEC from PLL instead of MCLK */
 608         reg = snd_soc_component_read32(component, WM8940_CLOCK);
 609         snd_soc_component_write(component, WM8940_CLOCK, reg | 0x100);
 610
 611         return 0;
 612 }
 613
 614 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 615                                  int clk_id, unsigned int freq, int dir)
 616 {
 617         struct snd_soc_component *component = codec_dai->component;
 618         struct wm8940_priv *wm8940 = snd_soc_component_get_drvdata(component);
 619
 620         switch (freq) {
 621         case 11289600:
 622         case 12000000:
 623         case 12288000:
 624         case 16934400:
 625         case 18432000:
 626                 wm8940->sysclk = freq;
 627                 return 0;
 628         }
 629         return -EINVAL;
 630 }
 631
 632 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 633                                  int div_id, int div)
 634 {
 635         struct snd_soc_component *component = codec_dai->component;
 636         u16 reg;
 637         int ret = 0;
 638
 639         switch (div_id) {
 640         case WM8940_BCLKDIV:
 641                 reg = snd_soc_component_read32(component, WM8940_CLOCK) & 0xFFE3;
 642                 ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 2));
 643                 break;
 644         case WM8940_MCLKDIV:
 645                 reg = snd_soc_component_read32(component, WM8940_CLOCK) & 0xFF1F;
 646                 ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 5));
 647                 break;
 648         case WM8940_OPCLKDIV:
 649                 reg = snd_soc_component_read32(component, WM8940_GPIO) & 0xFFCF;
 650                 ret = snd_soc_component_write(component, WM8940_GPIO, reg | (div << 4));
 651                 break;
 652         }
 653         return ret;
 654 }
 655
 656 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
 657
 658 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 |                           \
 659                         SNDRV_PCM_FMTBIT_S16_LE |                       \
 660                         SNDRV_PCM_FMTBIT_S20_3LE |                      \
 661                         SNDRV_PCM_FMTBIT_S24_LE |                       \
 662                         SNDRV_PCM_FMTBIT_S32_LE)
 663
 664 static const struct snd_soc_dai_ops wm8940_dai_ops = {
 665         .hw_params = wm8940_i2s_hw_params,
 666         .set_sysclk = wm8940_set_dai_sysclk,
 667         .digital_mute = wm8940_mute,
 668         .set_fmt = wm8940_set_dai_fmt,
 669         .set_clkdiv = wm8940_set_dai_clkdiv,
 670         .set_pll = wm8940_set_dai_pll,
 671 };
 672
 673 static struct snd_soc_dai_driver wm8940_dai = {
 674         .name = "wm8940-hifi",
 675         .playback = {
 676                 .stream_name = "Playback",
 677                 .channels_min = 1,
 678                 .channels_max = 2,
 679                 .rates = WM8940_RATES,
 680                 .formats = WM8940_FORMATS,
 681         },
 682         .capture = {
 683                 .stream_name = "Capture",
 684                 .channels_min = 1,
 685                 .channels_max = 2,
 686                 .rates = WM8940_RATES,
 687                 .formats = WM8940_FORMATS,
 688         },
 689         .ops = &wm8940_dai_ops,
 690         .symmetric_rates = 1,
 691 };
 692
 693 static int wm8940_probe(struct snd_soc_component *component)
 694 {
 695         struct wm8940_setup_data *pdata = component->dev->platform_data;
 696         int ret;
 697         u16 reg;
 698
 699         ret = wm8940_reset(component);
 700         if (ret < 0) {
 701                 dev_err(component->dev, "Failed to issue reset\n");
 702                 return ret;
 703         }
 704
 705         snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
 706
 707         ret = snd_soc_component_write(component, WM8940_POWER1, 0x180);
 708         if (ret < 0)
 709                 return ret;
 710
 711         if (!pdata)
 712                 dev_warn(component->dev, "No platform data supplied\n");
 713         else {
 714                 reg = snd_soc_component_read32(component, WM8940_OUTPUTCTL);
 715                 ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, reg | pdata->vroi);
 716                 if (ret < 0)
 717                         return ret;
 718         }
 719
 720         return ret;
 721 }
 722
 723 static const struct snd_soc_component_driver soc_component_dev_wm8940 = {
 724         .probe                  = wm8940_probe,
 725         .set_bias_level         = wm8940_set_bias_level,
 726         .controls               = wm8940_snd_controls,
 727         .num_controls           = ARRAY_SIZE(wm8940_snd_controls),
 728         .dapm_widgets           = wm8940_dapm_widgets,
 729         .num_dapm_widgets       = ARRAY_SIZE(wm8940_dapm_widgets),
 730         .dapm_routes            = wm8940_dapm_routes,
 731         .num_dapm_routes        = ARRAY_SIZE(wm8940_dapm_routes),
 732         .suspend_bias_off       = 1,
 733         .idle_bias_on           = 1,
 734         .use_pmdown_time        = 1,
 735         .endianness             = 1,
 736         .non_legacy_dai_naming  = 1,
 737 };
 738
 739 static const struct regmap_config wm8940_regmap = {
 740         .reg_bits = 8,
 741         .val_bits = 16,
 742
 743         .max_register = WM8940_MONOMIX,
 744         .reg_defaults = wm8940_reg_defaults,
 745         .num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
 746         .cache_type = REGCACHE_RBTREE,
 747
 748         .readable_reg = wm8940_readable_register,
 749         .volatile_reg = wm8940_volatile_register,
 750 };
 751
 752 static int wm8940_i2c_probe(struct i2c_client *i2c,
 753                             const struct i2c_device_id *id)
 754 {
 755         struct wm8940_priv *wm8940;
 756         int ret;
 757
 758         wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),
 759                               GFP_KERNEL);
 760         if (wm8940 == NULL)
 761                 return -ENOMEM;
 762
 763         wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
 764         if (IS_ERR(wm8940->regmap))
 765                 return PTR_ERR(wm8940->regmap);
 766
 767         i2c_set_clientdata(i2c, wm8940);
 768
 769         ret = devm_snd_soc_register_component(&i2c->dev,
 770                         &soc_component_dev_wm8940, &wm8940_dai, 1);
 771
 772         return ret;
 773 }
 774
 775 static const struct i2c_device_id wm8940_i2c_id[] = {
 776         { "wm8940", 0 },
 777         { }
 778 };
 779 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
 780
 781 static struct i2c_driver wm8940_i2c_driver = {
 782         .driver = {
 783                 .name = "wm8940",
 784         },
 785         .probe =    wm8940_i2c_probe,
 786         .id_table = wm8940_i2c_id,
 787 };
 788
 789 module_i2c_driver(wm8940_i2c_driver);
 790
 791 MODULE_DESCRIPTION("ASoC WM8940 driver");
 792 MODULE_AUTHOR("Jonathan Cameron");
 793 MODULE_LICENSE("GPL");