sound/soc/codecs/wm8940.c

   1 /*
   2  * wm8940.c  --  WM8940 ALSA Soc Audio driver
   3  *
   4  * Author: Jonathan Cameron <jic23@cam.ac.uk>
   5  *
   6  * Based on wm8510.c
   7  *    Copyright  2006 Wolfson Microelectronics PLC.
   8  *    Author:  Liam Girdwood <lrg@slimlogic.co.uk>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * Not currently handled:
  15  * Notch filter control
  16  * AUXMode (inverting vs mixer)
  17  * No means to obtain current gain if alc enabled.
  18  * No use made of gpio
  19  * Fast VMID discharge for power down
  20  * Soft Start
  21  * DLR and ALR Swaps not enabled
  22  * Digital Sidetone not supported
  23  */
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/i2c.h>
  31 #include <linux/regmap.h>
  32 #include <linux/slab.h>
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/soc.h>
  37 #include <sound/initval.h>
  38 #include <sound/tlv.h>
  39
  40 #include "wm8940.h"
  41
  42 struct wm8940_priv {
  43         unsigned int sysclk;
  44         struct regmap *regmap;
  45 };
  46
  47 static bool wm8940_volatile_register(struct device *dev, unsigned int reg)
  48 {
  49         switch (reg) {
  50         case WM8940_SOFTRESET:
  51                 return true;
  52         default:
  53                 return false;
  54         }
  55 }
  56
  57 static bool wm8940_readable_register(struct device *dev, unsigned int reg)
  58 {
  59         switch (reg) {
  60         case WM8940_SOFTRESET:
  61         case WM8940_POWER1:
  62         case WM8940_POWER2:
  63         case WM8940_POWER3:
  64         case WM8940_IFACE:
  65         case WM8940_COMPANDINGCTL:
  66         case WM8940_CLOCK:
  67         case WM8940_ADDCNTRL:
  68         case WM8940_GPIO:
  69         case WM8940_CTLINT:
  70         case WM8940_DAC:
  71         case WM8940_DACVOL:
  72         case WM8940_ADC:
  73         case WM8940_ADCVOL:
  74         case WM8940_NOTCH1:
  75         case WM8940_NOTCH2:
  76         case WM8940_NOTCH3:
  77         case WM8940_NOTCH4:
  78         case WM8940_NOTCH5:
  79         case WM8940_NOTCH6:
  80         case WM8940_NOTCH7:
  81         case WM8940_NOTCH8:
  82         case WM8940_DACLIM1:
  83         case WM8940_DACLIM2:
  84         case WM8940_ALC1:
  85         case WM8940_ALC2:
  86         case WM8940_ALC3:
  87         case WM8940_NOISEGATE:
  88         case WM8940_PLLN:
  89         case WM8940_PLLK1:
  90         case WM8940_PLLK2:
  91         case WM8940_PLLK3:
  92         case WM8940_ALC4:
  93         case WM8940_INPUTCTL:
  94         case WM8940_PGAGAIN:
  95         case WM8940_ADCBOOST:
  96         case WM8940_OUTPUTCTL:
  97         case WM8940_SPKMIX:
  98         case WM8940_SPKVOL:
  99         case WM8940_MONOMIX:
 100                 return true;
 101         default:
 102                 return false;
 103         }
 104 }
 105
 106 static const struct reg_default wm8940_reg_defaults[] = {
 107         {  0x1, 0x0000 }, /* Power 1 */
 108         {  0x2, 0x0000 }, /* Power 2 */
 109         {  0x3, 0x0000 }, /* Power 3 */
 110         {  0x4, 0x0010 }, /* Interface Control */
 111         {  0x5, 0x0000 }, /* Companding Control */
 112         {  0x6, 0x0140 }, /* Clock Control */
 113         {  0x7, 0x0000 }, /* Additional Controls */
 114         {  0x8, 0x0000 }, /* GPIO Control */
 115         {  0x9, 0x0002 }, /* Auto Increment Control */
 116         {  0xa, 0x0000 }, /* DAC Control */
 117         {  0xb, 0x00FF }, /* DAC Volume */
 118
 119         {  0xe, 0x0100 }, /* ADC Control */
 120         {  0xf, 0x00FF }, /* ADC Volume */
 121         { 0x10, 0x0000 }, /* Notch Filter 1 Control 1 */
 122         { 0x11, 0x0000 }, /* Notch Filter 1 Control 2 */
 123         { 0x12, 0x0000 }, /* Notch Filter 2 Control 1 */
 124         { 0x13, 0x0000 }, /* Notch Filter 2 Control 2 */
 125         { 0x14, 0x0000 }, /* Notch Filter 3 Control 1 */
 126         { 0x15, 0x0000 }, /* Notch Filter 3 Control 2 */
 127         { 0x16, 0x0000 }, /* Notch Filter 4 Control 1 */
 128         { 0x17, 0x0000 }, /* Notch Filter 4 Control 2 */
 129         { 0x18, 0x0032 }, /* DAC Limit Control 1 */
 130         { 0x19, 0x0000 }, /* DAC Limit Control 2 */
 131
 132         { 0x20, 0x0038 }, /* ALC Control 1 */
 133         { 0x21, 0x000B }, /* ALC Control 2 */
 134         { 0x22, 0x0032 }, /* ALC Control 3 */
 135         { 0x23, 0x0000 }, /* Noise Gate */
 136         { 0x24, 0x0041 }, /* PLLN */
 137         { 0x25, 0x000C }, /* PLLK1 */
 138         { 0x26, 0x0093 }, /* PLLK2 */
 139         { 0x27, 0x00E9 }, /* PLLK3 */
 140
 141         { 0x2a, 0x0030 }, /* ALC Control 4 */
 142
 143         { 0x2c, 0x0002 }, /* Input Control */
 144         { 0x2d, 0x0050 }, /* PGA Gain */
 145
 146         { 0x2f, 0x0002 }, /* ADC Boost Control */
 147
 148         { 0x31, 0x0002 }, /* Output Control */
 149         { 0x32, 0x0000 }, /* Speaker Mixer Control */
 150
 151         { 0x36, 0x0079 }, /* Speaker Volume */
 152
 153         { 0x38, 0x0000 }, /* Mono Mixer Control */
 154 };
 155
 156 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
 157 static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum,
 158                             WM8940_COMPANDINGCTL, 1, wm8940_companding);
 159 static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum,
 160                             WM8940_COMPANDINGCTL, 3, wm8940_companding);
 161
 162 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
 163 static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum,
 164                             WM8940_ALC3, 8, wm8940_alc_mode_text);
 165
 166 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
 167 static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum,
 168                             WM8940_INPUTCTL, 8, wm8940_mic_bias_level_text);
 169
 170 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
 171 static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum,
 172                             WM8940_ADC, 7, wm8940_filter_mode_text);
 173
 174 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
 175 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
 176 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
 177 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
 178 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
 179 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
 180 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
 181 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
 182 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
 183 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
 184
 185 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
 186         SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
 187                    6, 1, 0),
 188         SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
 189         SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
 190
 191         SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
 192         SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
 193         SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
 194                        3, 7, 1, wm8940_alc_max_tlv),
 195         SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
 196                        0, 7, 0, wm8940_alc_min_tlv),
 197         SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
 198                        0, 14, 0, wm8940_alc_tar_tlv),
 199         SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
 200         SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
 201         SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
 202         SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
 203         SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
 204                    3, 1, 0),
 205         SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
 206                    0, 7, 0),
 207
 208         SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
 209         SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
 210         SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
 211         SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
 212                        4, 9, 1, wm8940_lim_thresh_tlv),
 213         SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
 214                        0, 12, 0, wm8940_lim_boost_tlv),
 215
 216         SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
 217         SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
 218                        0, 63, 0, wm8940_pga_vol_tlv),
 219         SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
 220                        0, 255, 0, wm8940_adc_tlv),
 221         SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
 222                        0, 255, 0, wm8940_adc_tlv),
 223         SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
 224         SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
 225                        8, 1, 0, wm8940_capture_boost_vol_tlv),
 226         SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
 227                        0, 63, 0, wm8940_spk_vol_tlv),
 228         SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL,  6, 1, 1),
 229
 230         SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
 231                        8, 1, 1, wm8940_att_tlv),
 232         SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
 233
 234         SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
 235         SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
 236                        7, 1, 1, wm8940_att_tlv),
 237
 238         SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
 239         SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
 240         SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
 241         SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
 242         SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
 243         SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
 244         SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
 245 };
 246
 247 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
 248         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
 249         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
 250         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
 251 };
 252
 253 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
 254         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
 255         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
 256         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
 257 };
 258
 259 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
 260 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
 261         SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
 262         SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
 263                             0, 7, 0, wm8940_boost_vol_tlv),
 264         SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
 265                             4, 7, 0, wm8940_boost_vol_tlv),
 266 };
 267
 268 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
 269         SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
 270         SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
 271         SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
 272 };
 273
 274 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
 275         SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
 276                            &wm8940_speaker_mixer_controls[0],
 277                            ARRAY_SIZE(wm8940_speaker_mixer_controls)),
 278         SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
 279                            &wm8940_mono_mixer_controls[0],
 280                            ARRAY_SIZE(wm8940_mono_mixer_controls)),
 281         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
 282
 283         SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
 284         SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
 285         SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
 286         SND_SOC_DAPM_OUTPUT("MONOOUT"),
 287         SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 288         SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 289
 290         SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
 291         SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
 292         SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
 293                            &wm8940_micpga_controls[0],
 294                            ARRAY_SIZE(wm8940_micpga_controls)),
 295         SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
 296                            &wm8940_input_boost_controls[0],
 297                            ARRAY_SIZE(wm8940_input_boost_controls)),
 298         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
 299
 300         SND_SOC_DAPM_INPUT("MICN"),
 301         SND_SOC_DAPM_INPUT("MICP"),
 302         SND_SOC_DAPM_INPUT("AUX"),
 303 };
 304
 305 static const struct snd_soc_dapm_route wm8940_dapm_routes[] = {
 306         /* Mono output mixer */
 307         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 308         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 309         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 310
 311         /* Speaker output mixer */
 312         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 313         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 314         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 315
 316         /* Outputs */
 317         {"Mono Out", NULL, "Mono Mixer"},
 318         {"MONOOUT", NULL, "Mono Out"},
 319         {"SpkN Out", NULL, "Speaker Mixer"},
 320         {"SpkP Out", NULL, "Speaker Mixer"},
 321         {"SPKOUTN", NULL, "SpkN Out"},
 322         {"SPKOUTP", NULL, "SpkP Out"},
 323
 324         /*  Microphone PGA */
 325         {"Mic PGA", "MICN Switch", "MICN"},
 326         {"Mic PGA", "MICP Switch", "MICP"},
 327         {"Mic PGA", "AUX Switch", "AUX"},
 328
 329         /* Boost Mixer */
 330         {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
 331         {"Boost Mixer", "Mic Volume",  "MICP"},
 332         {"Boost Mixer", "Aux Volume", "Aux Input"},
 333
 334         {"ADC", NULL, "Boost Mixer"},
 335 };
 336
 337 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
 338
 339 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
 340                               unsigned int fmt)
 341 {
 342         struct snd_soc_codec *codec = codec_dai->codec;
 343         u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
 344         u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
 345
 346         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 347         case SND_SOC_DAIFMT_CBM_CFM:
 348                 clk |= 1;
 349                 break;
 350         case SND_SOC_DAIFMT_CBS_CFS:
 351                 break;
 352         default:
 353                 return -EINVAL;
 354         }
 355         snd_soc_write(codec, WM8940_CLOCK, clk);
 356
 357         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 358         case SND_SOC_DAIFMT_I2S:
 359                 iface |= (2 << 3);
 360                 break;
 361         case SND_SOC_DAIFMT_LEFT_J:
 362                 iface |= (1 << 3);
 363                 break;
 364         case SND_SOC_DAIFMT_RIGHT_J:
 365                 break;
 366         case SND_SOC_DAIFMT_DSP_A:
 367                 iface |= (3 << 3);
 368                 break;
 369         case SND_SOC_DAIFMT_DSP_B:
 370                 iface |= (3 << 3) | (1 << 7);
 371                 break;
 372         }
 373
 374         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 375         case SND_SOC_DAIFMT_NB_NF:
 376                 break;
 377         case SND_SOC_DAIFMT_NB_IF:
 378                 iface |= (1 << 7);
 379                 break;
 380         case SND_SOC_DAIFMT_IB_NF:
 381                 iface |= (1 << 8);
 382                 break;
 383         case SND_SOC_DAIFMT_IB_IF:
 384                 iface |= (1 << 8) | (1 << 7);
 385                 break;
 386         }
 387
 388         snd_soc_write(codec, WM8940_IFACE, iface);
 389
 390         return 0;
 391 }
 392
 393 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
 394                                 struct snd_pcm_hw_params *params,
 395                                 struct snd_soc_dai *dai)
 396 {
 397         struct snd_soc_codec *codec = dai->codec;
 398         u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
 399         u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
 400         u16 companding =  snd_soc_read(codec,
 401                                                 WM8940_COMPANDINGCTL) & 0xFFDF;
 402         int ret;
 403
 404         /* LoutR control */
 405         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
 406             && params_channels(params) == 2)
 407                 iface |= (1 << 9);
 408
 409         switch (params_rate(params)) {
 410         case 8000:
 411                 addcntrl |= (0x5 << 1);
 412                 break;
 413         case 11025:
 414                 addcntrl |= (0x4 << 1);
 415                 break;
 416         case 16000:
 417                 addcntrl |= (0x3 << 1);
 418                 break;
 419         case 22050:
 420                 addcntrl |= (0x2 << 1);
 421                 break;
 422         case 32000:
 423                 addcntrl |= (0x1 << 1);
 424                 break;
 425         case 44100:
 426         case 48000:
 427                 break;
 428         }
 429         ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
 430         if (ret)
 431                 goto error_ret;
 432
 433         switch (params_width(params)) {
 434         case 8:
 435                 companding = companding | (1 << 5);
 436                 break;
 437         case 16:
 438                 break;
 439         case 20:
 440                 iface |= (1 << 5);
 441                 break;
 442         case 24:
 443                 iface |= (2 << 5);
 444                 break;
 445         case 32:
 446                 iface |= (3 << 5);
 447                 break;
 448         }
 449         ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
 450         if (ret)
 451                 goto error_ret;
 452         ret = snd_soc_write(codec, WM8940_IFACE, iface);
 453
 454 error_ret:
 455         return ret;
 456 }
 457
 458 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
 459 {
 460         struct snd_soc_codec *codec = dai->codec;
 461         u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
 462
 463         if (mute)
 464                 mute_reg |= 0x40;
 465
 466         return snd_soc_write(codec, WM8940_DAC, mute_reg);
 467 }
 468
 469 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
 470                                  enum snd_soc_bias_level level)
 471 {
 472         struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 473         u16 val;
 474         u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
 475         int ret = 0;
 476
 477         switch (level) {
 478         case SND_SOC_BIAS_ON:
 479                 /* ensure bufioen and biasen */
 480                 pwr_reg |= (1 << 2) | (1 << 3);
 481                 /* Enable thermal shutdown */
 482                 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
 483                 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
 484                 if (ret)
 485                         break;
 486                 /* set vmid to 75k */
 487                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
 488                 break;
 489         case SND_SOC_BIAS_PREPARE:
 490                 /* ensure bufioen and biasen */
 491                 pwr_reg |= (1 << 2) | (1 << 3);
 492                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
 493                 break;
 494         case SND_SOC_BIAS_STANDBY:
 495                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 496                         ret = regcache_sync(wm8940->regmap);
 497                         if (ret < 0) {
 498                                 dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
 499                                 return ret;
 500                         }
 501                 }
 502
 503                 /* ensure bufioen and biasen */
 504                 pwr_reg |= (1 << 2) | (1 << 3);
 505                 /* set vmid to 300k for standby */
 506                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
 507                 break;
 508         case SND_SOC_BIAS_OFF:
 509                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
 510                 break;
 511         }
 512
 513         codec->dapm.bias_level = level;
 514
 515         return ret;
 516 }
 517
 518 struct pll_ {
 519         unsigned int pre_scale:2;
 520         unsigned int n:4;
 521         unsigned int k;
 522 };
 523
 524 static struct pll_ pll_div;
 525
 526 /* The size in bits of the pll divide multiplied by 10
 527  * to allow rounding later */
 528 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 529 static void pll_factors(unsigned int target, unsigned int source)
 530 {
 531         unsigned long long Kpart;
 532         unsigned int K, Ndiv, Nmod;
 533         /* The left shift ist to avoid accuracy loss when right shifting */
 534         Ndiv = target / source;
 535
 536         if (Ndiv > 12) {
 537                 source <<= 1;
 538                 /* Multiply by 2 */
 539                 pll_div.pre_scale = 0;
 540                 Ndiv = target / source;
 541         } else if (Ndiv < 3) {
 542                 source >>= 2;
 543                 /* Divide by 4 */
 544                 pll_div.pre_scale = 3;
 545                 Ndiv = target / source;
 546         } else if (Ndiv < 6) {
 547                 source >>= 1;
 548                 /* divide by 2 */
 549                 pll_div.pre_scale = 2;
 550                 Ndiv = target / source;
 551         } else
 552                 pll_div.pre_scale = 1;
 553
 554         if ((Ndiv < 6) || (Ndiv > 12))
 555                 printk(KERN_WARNING
 556                         "WM8940 N value %d outwith recommended range!d\n",
 557                         Ndiv);
 558
 559         pll_div.n = Ndiv;
 560         Nmod = target % source;
 561         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 562
 563         do_div(Kpart, source);
 564
 565         K = Kpart & 0xFFFFFFFF;
 566
 567         /* Check if we need to round */
 568         if ((K % 10) >= 5)
 569                 K += 5;
 570
 571         /* Move down to proper range now rounding is done */
 572         K /= 10;
 573
 574         pll_div.k = K;
 575 }
 576
 577 /* Untested at the moment */
 578 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 579                 int source, unsigned int freq_in, unsigned int freq_out)
 580 {
 581         struct snd_soc_codec *codec = codec_dai->codec;
 582         u16 reg;
 583
 584         /* Turn off PLL */
 585         reg = snd_soc_read(codec, WM8940_POWER1);
 586         snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
 587
 588         if (freq_in == 0 || freq_out == 0) {
 589                 /* Clock CODEC directly from MCLK */
 590                 reg = snd_soc_read(codec, WM8940_CLOCK);
 591                 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
 592                 /* Pll power down */
 593                 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
 594                 return 0;
 595         }
 596
 597         /* Pll is followed by a frequency divide by 4 */
 598         pll_factors(freq_out*4, freq_in);
 599         if (pll_div.k)
 600                 snd_soc_write(codec, WM8940_PLLN,
 601                              (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
 602         else /* No factional component */
 603                 snd_soc_write(codec, WM8940_PLLN,
 604                              (pll_div.pre_scale << 4) | pll_div.n);
 605         snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
 606         snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
 607         snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
 608         /* Enable the PLL */
 609         reg = snd_soc_read(codec, WM8940_POWER1);
 610         snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
 611
 612         /* Run CODEC from PLL instead of MCLK */
 613         reg = snd_soc_read(codec, WM8940_CLOCK);
 614         snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
 615
 616         return 0;
 617 }
 618
 619 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 620                                  int clk_id, unsigned int freq, int dir)
 621 {
 622         struct snd_soc_codec *codec = codec_dai->codec;
 623         struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 624
 625         switch (freq) {
 626         case 11289600:
 627         case 12000000:
 628         case 12288000:
 629         case 16934400:
 630         case 18432000:
 631                 wm8940->sysclk = freq;
 632                 return 0;
 633         }
 634         return -EINVAL;
 635 }
 636
 637 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 638                                  int div_id, int div)
 639 {
 640         struct snd_soc_codec *codec = codec_dai->codec;
 641         u16 reg;
 642         int ret = 0;
 643
 644         switch (div_id) {
 645         case WM8940_BCLKDIV:
 646                 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFE3;
 647                 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
 648                 break;
 649         case WM8940_MCLKDIV:
 650                 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
 651                 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
 652                 break;
 653         case WM8940_OPCLKDIV:
 654                 reg = snd_soc_read(codec, WM8940_GPIO) & 0xFFCF;
 655                 ret = snd_soc_write(codec, WM8940_GPIO, reg | (div << 4));
 656                 break;
 657         }
 658         return ret;
 659 }
 660
 661 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
 662
 663 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 |                           \
 664                         SNDRV_PCM_FMTBIT_S16_LE |                       \
 665                         SNDRV_PCM_FMTBIT_S20_3LE |                      \
 666                         SNDRV_PCM_FMTBIT_S24_LE |                       \
 667                         SNDRV_PCM_FMTBIT_S32_LE)
 668
 669 static const struct snd_soc_dai_ops wm8940_dai_ops = {
 670         .hw_params = wm8940_i2s_hw_params,
 671         .set_sysclk = wm8940_set_dai_sysclk,
 672         .digital_mute = wm8940_mute,
 673         .set_fmt = wm8940_set_dai_fmt,
 674         .set_clkdiv = wm8940_set_dai_clkdiv,
 675         .set_pll = wm8940_set_dai_pll,
 676 };
 677
 678 static struct snd_soc_dai_driver wm8940_dai = {
 679         .name = "wm8940-hifi",
 680         .playback = {
 681                 .stream_name = "Playback",
 682                 .channels_min = 1,
 683                 .channels_max = 2,
 684                 .rates = WM8940_RATES,
 685                 .formats = WM8940_FORMATS,
 686         },
 687         .capture = {
 688                 .stream_name = "Capture",
 689                 .channels_min = 1,
 690                 .channels_max = 2,
 691                 .rates = WM8940_RATES,
 692                 .formats = WM8940_FORMATS,
 693         },
 694         .ops = &wm8940_dai_ops,
 695         .symmetric_rates = 1,
 696 };
 697
 698 static int wm8940_probe(struct snd_soc_codec *codec)
 699 {
 700         struct wm8940_setup_data *pdata = codec->dev->platform_data;
 701         int ret;
 702         u16 reg;
 703
 704         ret = wm8940_reset(codec);
 705         if (ret < 0) {
 706                 dev_err(codec->dev, "Failed to issue reset\n");
 707                 return ret;
 708         }
 709
 710         wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 711
 712         ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
 713         if (ret < 0)
 714                 return ret;
 715
 716         if (!pdata)
 717                 dev_warn(codec->dev, "No platform data supplied\n");
 718         else {
 719                 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
 720                 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
 721                 if (ret < 0)
 722                         return ret;
 723         }
 724
 725         return ret;
 726 }
 727
 728 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
 729         .probe =        wm8940_probe,
 730         .set_bias_level = wm8940_set_bias_level,
 731         .suspend_bias_off = true,
 732
 733         .controls =     wm8940_snd_controls,
 734         .num_controls = ARRAY_SIZE(wm8940_snd_controls),
 735         .dapm_widgets = wm8940_dapm_widgets,
 736         .num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets),
 737         .dapm_routes =  wm8940_dapm_routes,
 738         .num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes),
 739 };
 740
 741 static const struct regmap_config wm8940_regmap = {
 742         .reg_bits = 8,
 743         .val_bits = 16,
 744
 745         .max_register = WM8940_MONOMIX,
 746         .reg_defaults = wm8940_reg_defaults,
 747         .num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
 748
 749         .readable_reg = wm8940_readable_register,
 750         .volatile_reg = wm8940_volatile_register,
 751 };
 752
 753 static int wm8940_i2c_probe(struct i2c_client *i2c,
 754                             const struct i2c_device_id *id)
 755 {
 756         struct wm8940_priv *wm8940;
 757         int ret;
 758
 759         wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),
 760                               GFP_KERNEL);
 761         if (wm8940 == NULL)
 762                 return -ENOMEM;
 763
 764         wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
 765         if (IS_ERR(wm8940->regmap))
 766                 return PTR_ERR(wm8940->regmap);
 767
 768         i2c_set_clientdata(i2c, wm8940);
 769
 770         ret = snd_soc_register_codec(&i2c->dev,
 771                         &soc_codec_dev_wm8940, &wm8940_dai, 1);
 772
 773         return ret;
 774 }
 775
 776 static int wm8940_i2c_remove(struct i2c_client *client)
 777 {
 778         snd_soc_unregister_codec(&client->dev);
 779
 780         return 0;
 781 }
 782
 783 static const struct i2c_device_id wm8940_i2c_id[] = {
 784         { "wm8940", 0 },
 785         { }
 786 };
 787 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
 788
 789 static struct i2c_driver wm8940_i2c_driver = {
 790         .driver = {
 791                 .name = "wm8940",
 792                 .owner = THIS_MODULE,
 793         },
 794         .probe =    wm8940_i2c_probe,
 795         .remove =   wm8940_i2c_remove,
 796         .id_table = wm8940_i2c_id,
 797 };
 798
 799 module_i2c_driver(wm8940_i2c_driver);
 800
 801 MODULE_DESCRIPTION("ASoC WM8940 driver");
 802 MODULE_AUTHOR("Jonathan Cameron");
 803 MODULE_LICENSE("GPL");