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/platform_device.h>
  32 #include <linux/spi/spi.h>
  33 #include <linux/slab.h>
  34 #include <sound/core.h>
  35 #include <sound/pcm.h>
  36 #include <sound/pcm_params.h>
  37 #include <sound/soc.h>
  38 #include <sound/initval.h>
  39 #include <sound/tlv.h>
  40
  41 #include "wm8940.h"
  42
  43 struct wm8940_priv {
  44         unsigned int sysclk;
  45         enum snd_soc_control_type control_type;
  46         void *control_data;
  47 };
  48
  49 static u16 wm8940_reg_defaults[] = {
  50         0x8940, /* Soft Reset */
  51         0x0000, /* Power 1 */
  52         0x0000, /* Power 2 */
  53         0x0000, /* Power 3 */
  54         0x0010, /* Interface Control */
  55         0x0000, /* Companding Control */
  56         0x0140, /* Clock Control */
  57         0x0000, /* Additional Controls */
  58         0x0000, /* GPIO Control */
  59         0x0002, /* Auto Increment Control */
  60         0x0000, /* DAC Control */
  61         0x00FF, /* DAC Volume */
  62         0,
  63         0,
  64         0x0100, /* ADC Control */
  65         0x00FF, /* ADC Volume */
  66         0x0000, /* Notch Filter 1 Control 1 */
  67         0x0000, /* Notch Filter 1 Control 2 */
  68         0x0000, /* Notch Filter 2 Control 1 */
  69         0x0000, /* Notch Filter 2 Control 2 */
  70         0x0000, /* Notch Filter 3 Control 1 */
  71         0x0000, /* Notch Filter 3 Control 2 */
  72         0x0000, /* Notch Filter 4 Control 1 */
  73         0x0000, /* Notch Filter 4 Control 2 */
  74         0x0032, /* DAC Limit Control 1 */
  75         0x0000, /* DAC Limit Control 2 */
  76         0,
  77         0,
  78         0,
  79         0,
  80         0,
  81         0,
  82         0x0038, /* ALC Control 1 */
  83         0x000B, /* ALC Control 2 */
  84         0x0032, /* ALC Control 3 */
  85         0x0000, /* Noise Gate */
  86         0x0041, /* PLLN */
  87         0x000C, /* PLLK1 */
  88         0x0093, /* PLLK2 */
  89         0x00E9, /* PLLK3 */
  90         0,
  91         0,
  92         0x0030, /* ALC Control 4 */
  93         0,
  94         0x0002, /* Input Control */
  95         0x0050, /* PGA Gain */
  96         0,
  97         0x0002, /* ADC Boost Control */
  98         0,
  99         0x0002, /* Output Control */
 100         0x0000, /* Speaker Mixer Control */
 101         0,
 102         0,
 103         0,
 104         0x0079, /* Speaker Volume */
 105         0,
 106         0x0000, /* Mono Mixer Control */
 107 };
 108
 109 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
 110 static const struct soc_enum wm8940_adc_companding_enum
 111 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
 112 static const struct soc_enum wm8940_dac_companding_enum
 113 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
 114
 115 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
 116 static const struct soc_enum wm8940_alc_mode_enum
 117 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
 118
 119 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
 120 static const struct soc_enum wm8940_mic_bias_level_enum
 121 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
 122
 123 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
 124 static const struct soc_enum wm8940_filter_mode_enum
 125 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
 126
 127 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
 128 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
 129 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
 130 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
 131 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
 132 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
 133 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
 134 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
 135 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
 136 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
 137
 138 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
 139         SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
 140                    6, 1, 0),
 141         SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
 142         SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
 143
 144         SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
 145         SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
 146         SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
 147                        3, 7, 1, wm8940_alc_max_tlv),
 148         SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
 149                        0, 7, 0, wm8940_alc_min_tlv),
 150         SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
 151                        0, 14, 0, wm8940_alc_tar_tlv),
 152         SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
 153         SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
 154         SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
 155         SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
 156         SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
 157                    3, 1, 0),
 158         SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
 159                    0, 7, 0),
 160
 161         SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
 162         SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
 163         SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
 164         SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
 165                        4, 9, 1, wm8940_lim_thresh_tlv),
 166         SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
 167                        0, 12, 0, wm8940_lim_boost_tlv),
 168
 169         SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
 170         SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
 171                        0, 63, 0, wm8940_pga_vol_tlv),
 172         SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
 173                        0, 255, 0, wm8940_adc_tlv),
 174         SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
 175                        0, 255, 0, wm8940_adc_tlv),
 176         SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
 177         SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
 178                        8, 1, 0, wm8940_capture_boost_vol_tlv),
 179         SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
 180                        0, 63, 0, wm8940_spk_vol_tlv),
 181         SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL,  6, 1, 1),
 182
 183         SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
 184                        8, 1, 1, wm8940_att_tlv),
 185         SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
 186
 187         SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
 188         SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
 189                        7, 1, 1, wm8940_att_tlv),
 190
 191         SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
 192         SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
 193         SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
 194         SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
 195         SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
 196         SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
 197         SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
 198 };
 199
 200 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
 201         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
 202         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
 203         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
 204 };
 205
 206 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
 207         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
 208         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
 209         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
 210 };
 211
 212 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
 213 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
 214         SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
 215         SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
 216                             0, 7, 0, wm8940_boost_vol_tlv),
 217         SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
 218                             4, 7, 0, wm8940_boost_vol_tlv),
 219 };
 220
 221 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
 222         SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
 223         SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
 224         SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
 225 };
 226
 227 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
 228         SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
 229                            &wm8940_speaker_mixer_controls[0],
 230                            ARRAY_SIZE(wm8940_speaker_mixer_controls)),
 231         SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
 232                            &wm8940_mono_mixer_controls[0],
 233                            ARRAY_SIZE(wm8940_mono_mixer_controls)),
 234         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
 235
 236         SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
 237         SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
 238         SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
 239         SND_SOC_DAPM_OUTPUT("MONOOUT"),
 240         SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 241         SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 242
 243         SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
 244         SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
 245         SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
 246                            &wm8940_micpga_controls[0],
 247                            ARRAY_SIZE(wm8940_micpga_controls)),
 248         SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
 249                            &wm8940_input_boost_controls[0],
 250                            ARRAY_SIZE(wm8940_input_boost_controls)),
 251         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
 252
 253         SND_SOC_DAPM_INPUT("MICN"),
 254         SND_SOC_DAPM_INPUT("MICP"),
 255         SND_SOC_DAPM_INPUT("AUX"),
 256 };
 257
 258 static const struct snd_soc_dapm_route audio_map[] = {
 259         /* Mono output mixer */
 260         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 261         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 262         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 263
 264         /* Speaker output mixer */
 265         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 266         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 267         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 268
 269         /* Outputs */
 270         {"Mono Out", NULL, "Mono Mixer"},
 271         {"MONOOUT", NULL, "Mono Out"},
 272         {"SpkN Out", NULL, "Speaker Mixer"},
 273         {"SpkP Out", NULL, "Speaker Mixer"},
 274         {"SPKOUTN", NULL, "SpkN Out"},
 275         {"SPKOUTP", NULL, "SpkP Out"},
 276
 277         /*  Microphone PGA */
 278         {"Mic PGA", "MICN Switch", "MICN"},
 279         {"Mic PGA", "MICP Switch", "MICP"},
 280         {"Mic PGA", "AUX Switch", "AUX"},
 281
 282         /* Boost Mixer */
 283         {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
 284         {"Boost Mixer", "Mic Volume",  "MICP"},
 285         {"Boost Mixer", "Aux Volume", "Aux Input"},
 286
 287         {"ADC", NULL, "Boost Mixer"},
 288 };
 289
 290 static int wm8940_add_widgets(struct snd_soc_codec *codec)
 291 {
 292         struct snd_soc_dapm_context *dapm = &codec->dapm;
 293         int ret;
 294
 295         ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets,
 296                                         ARRAY_SIZE(wm8940_dapm_widgets));
 297         if (ret)
 298                 goto error_ret;
 299         ret = snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 300
 301 error_ret:
 302         return ret;
 303 }
 304
 305 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
 306
 307 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
 308                               unsigned int fmt)
 309 {
 310         struct snd_soc_codec *codec = codec_dai->codec;
 311         u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
 312         u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
 313
 314         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 315         case SND_SOC_DAIFMT_CBM_CFM:
 316                 clk |= 1;
 317                 break;
 318         case SND_SOC_DAIFMT_CBS_CFS:
 319                 break;
 320         default:
 321                 return -EINVAL;
 322         }
 323         snd_soc_write(codec, WM8940_CLOCK, clk);
 324
 325         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 326         case SND_SOC_DAIFMT_I2S:
 327                 iface |= (2 << 3);
 328                 break;
 329         case SND_SOC_DAIFMT_LEFT_J:
 330                 iface |= (1 << 3);
 331                 break;
 332         case SND_SOC_DAIFMT_RIGHT_J:
 333                 break;
 334         case SND_SOC_DAIFMT_DSP_A:
 335                 iface |= (3 << 3);
 336                 break;
 337         case SND_SOC_DAIFMT_DSP_B:
 338                 iface |= (3 << 3) | (1 << 7);
 339                 break;
 340         }
 341
 342         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 343         case SND_SOC_DAIFMT_NB_NF:
 344                 break;
 345         case SND_SOC_DAIFMT_NB_IF:
 346                 iface |= (1 << 7);
 347                 break;
 348         case SND_SOC_DAIFMT_IB_NF:
 349                 iface |= (1 << 8);
 350                 break;
 351         case SND_SOC_DAIFMT_IB_IF:
 352                 iface |= (1 << 8) | (1 << 7);
 353                 break;
 354         }
 355
 356         snd_soc_write(codec, WM8940_IFACE, iface);
 357
 358         return 0;
 359 }
 360
 361 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
 362                                 struct snd_pcm_hw_params *params,
 363                                 struct snd_soc_dai *dai)
 364 {
 365         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 366         struct snd_soc_codec *codec = rtd->codec;
 367         u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
 368         u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
 369         u16 companding =  snd_soc_read(codec,
 370                                                 WM8940_COMPANDINGCTL) & 0xFFDF;
 371         int ret;
 372
 373         /* LoutR control */
 374         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
 375             && params_channels(params) == 2)
 376                 iface |= (1 << 9);
 377
 378         switch (params_rate(params)) {
 379         case 8000:
 380                 addcntrl |= (0x5 << 1);
 381                 break;
 382         case 11025:
 383                 addcntrl |= (0x4 << 1);
 384                 break;
 385         case 16000:
 386                 addcntrl |= (0x3 << 1);
 387                 break;
 388         case 22050:
 389                 addcntrl |= (0x2 << 1);
 390                 break;
 391         case 32000:
 392                 addcntrl |= (0x1 << 1);
 393                 break;
 394         case 44100:
 395         case 48000:
 396                 break;
 397         }
 398         ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
 399         if (ret)
 400                 goto error_ret;
 401
 402         switch (params_format(params)) {
 403         case SNDRV_PCM_FORMAT_S8:
 404                 companding = companding | (1 << 5);
 405                 break;
 406         case SNDRV_PCM_FORMAT_S16_LE:
 407                 break;
 408         case SNDRV_PCM_FORMAT_S20_3LE:
 409                 iface |= (1 << 5);
 410                 break;
 411         case SNDRV_PCM_FORMAT_S24_LE:
 412                 iface |= (2 << 5);
 413                 break;
 414         case SNDRV_PCM_FORMAT_S32_LE:
 415                 iface |= (3 << 5);
 416                 break;
 417         }
 418         ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
 419         if (ret)
 420                 goto error_ret;
 421         ret = snd_soc_write(codec, WM8940_IFACE, iface);
 422
 423 error_ret:
 424         return ret;
 425 }
 426
 427 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
 428 {
 429         struct snd_soc_codec *codec = dai->codec;
 430         u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
 431
 432         if (mute)
 433                 mute_reg |= 0x40;
 434
 435         return snd_soc_write(codec, WM8940_DAC, mute_reg);
 436 }
 437
 438 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
 439                                  enum snd_soc_bias_level level)
 440 {
 441         u16 val;
 442         u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
 443         int ret = 0;
 444
 445         switch (level) {
 446         case SND_SOC_BIAS_ON:
 447                 /* ensure bufioen and biasen */
 448                 pwr_reg |= (1 << 2) | (1 << 3);
 449                 /* Enable thermal shutdown */
 450                 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
 451                 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
 452                 if (ret)
 453                         break;
 454                 /* set vmid to 75k */
 455                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
 456                 break;
 457         case SND_SOC_BIAS_PREPARE:
 458                 /* ensure bufioen and biasen */
 459                 pwr_reg |= (1 << 2) | (1 << 3);
 460                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
 461                 break;
 462         case SND_SOC_BIAS_STANDBY:
 463                 /* ensure bufioen and biasen */
 464                 pwr_reg |= (1 << 2) | (1 << 3);
 465                 /* set vmid to 300k for standby */
 466                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
 467                 break;
 468         case SND_SOC_BIAS_OFF:
 469                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
 470                 break;
 471         }
 472
 473         return ret;
 474 }
 475
 476 struct pll_ {
 477         unsigned int pre_scale:2;
 478         unsigned int n:4;
 479         unsigned int k;
 480 };
 481
 482 static struct pll_ pll_div;
 483
 484 /* The size in bits of the pll divide multiplied by 10
 485  * to allow rounding later */
 486 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 487 static void pll_factors(unsigned int target, unsigned int source)
 488 {
 489         unsigned long long Kpart;
 490         unsigned int K, Ndiv, Nmod;
 491         /* The left shift ist to avoid accuracy loss when right shifting */
 492         Ndiv = target / source;
 493
 494         if (Ndiv > 12) {
 495                 source <<= 1;
 496                 /* Multiply by 2 */
 497                 pll_div.pre_scale = 0;
 498                 Ndiv = target / source;
 499         } else if (Ndiv < 3) {
 500                 source >>= 2;
 501                 /* Divide by 4 */
 502                 pll_div.pre_scale = 3;
 503                 Ndiv = target / source;
 504         } else if (Ndiv < 6) {
 505                 source >>= 1;
 506                 /* divide by 2 */
 507                 pll_div.pre_scale = 2;
 508                 Ndiv = target / source;
 509         } else
 510                 pll_div.pre_scale = 1;
 511
 512         if ((Ndiv < 6) || (Ndiv > 12))
 513                 printk(KERN_WARNING
 514                         "WM8940 N value %d outwith recommended range!d\n",
 515                         Ndiv);
 516
 517         pll_div.n = Ndiv;
 518         Nmod = target % source;
 519         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 520
 521         do_div(Kpart, source);
 522
 523         K = Kpart & 0xFFFFFFFF;
 524
 525         /* Check if we need to round */
 526         if ((K % 10) >= 5)
 527                 K += 5;
 528
 529         /* Move down to proper range now rounding is done */
 530         K /= 10;
 531
 532         pll_div.k = K;
 533 }
 534
 535 /* Untested at the moment */
 536 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 537                 int source, unsigned int freq_in, unsigned int freq_out)
 538 {
 539         struct snd_soc_codec *codec = codec_dai->codec;
 540         u16 reg;
 541
 542         /* Turn off PLL */
 543         reg = snd_soc_read(codec, WM8940_POWER1);
 544         snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
 545
 546         if (freq_in == 0 || freq_out == 0) {
 547                 /* Clock CODEC directly from MCLK */
 548                 reg = snd_soc_read(codec, WM8940_CLOCK);
 549                 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
 550                 /* Pll power down */
 551                 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
 552                 return 0;
 553         }
 554
 555         /* Pll is followed by a frequency divide by 4 */
 556         pll_factors(freq_out*4, freq_in);
 557         if (pll_div.k)
 558                 snd_soc_write(codec, WM8940_PLLN,
 559                              (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
 560         else /* No factional component */
 561                 snd_soc_write(codec, WM8940_PLLN,
 562                              (pll_div.pre_scale << 4) | pll_div.n);
 563         snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
 564         snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
 565         snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
 566         /* Enable the PLL */
 567         reg = snd_soc_read(codec, WM8940_POWER1);
 568         snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
 569
 570         /* Run CODEC from PLL instead of MCLK */
 571         reg = snd_soc_read(codec, WM8940_CLOCK);
 572         snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
 573
 574         return 0;
 575 }
 576
 577 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 578                                  int clk_id, unsigned int freq, int dir)
 579 {
 580         struct snd_soc_codec *codec = codec_dai->codec;
 581         struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 582
 583         switch (freq) {
 584         case 11289600:
 585         case 12000000:
 586         case 12288000:
 587         case 16934400:
 588         case 18432000:
 589                 wm8940->sysclk = freq;
 590                 return 0;
 591         }
 592         return -EINVAL;
 593 }
 594
 595 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 596                                  int div_id, int div)
 597 {
 598         struct snd_soc_codec *codec = codec_dai->codec;
 599         u16 reg;
 600         int ret = 0;
 601
 602         switch (div_id) {
 603         case WM8940_BCLKDIV:
 604                 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
 605                 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
 606                 break;
 607         case WM8940_MCLKDIV:
 608                 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
 609                 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
 610                 break;
 611         case WM8940_OPCLKDIV:
 612                 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
 613                 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
 614                 break;
 615         }
 616         return ret;
 617 }
 618
 619 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
 620
 621 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 |                           \
 622                         SNDRV_PCM_FMTBIT_S16_LE |                       \
 623                         SNDRV_PCM_FMTBIT_S20_3LE |                      \
 624                         SNDRV_PCM_FMTBIT_S24_LE |                       \
 625                         SNDRV_PCM_FMTBIT_S32_LE)
 626
 627 static struct snd_soc_dai_ops wm8940_dai_ops = {
 628         .hw_params = wm8940_i2s_hw_params,
 629         .set_sysclk = wm8940_set_dai_sysclk,
 630         .digital_mute = wm8940_mute,
 631         .set_fmt = wm8940_set_dai_fmt,
 632         .set_clkdiv = wm8940_set_dai_clkdiv,
 633         .set_pll = wm8940_set_dai_pll,
 634 };
 635
 636 static struct snd_soc_dai_driver wm8940_dai = {
 637         .name = "wm8940-hifi",
 638         .playback = {
 639                 .stream_name = "Playback",
 640                 .channels_min = 1,
 641                 .channels_max = 2,
 642                 .rates = WM8940_RATES,
 643                 .formats = WM8940_FORMATS,
 644         },
 645         .capture = {
 646                 .stream_name = "Capture",
 647                 .channels_min = 1,
 648                 .channels_max = 2,
 649                 .rates = WM8940_RATES,
 650                 .formats = WM8940_FORMATS,
 651         },
 652         .ops = &wm8940_dai_ops,
 653         .symmetric_rates = 1,
 654 };
 655
 656 static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
 657 {
 658         return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
 659 }
 660
 661 static int wm8940_resume(struct snd_soc_codec *codec)
 662 {
 663         int i;
 664         int ret;
 665         u8 data[3];
 666         u16 *cache = codec->reg_cache;
 667
 668         /* Sync reg_cache with the hardware
 669          * Could use auto incremented writes to speed this up
 670          */
 671         for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
 672                 data[0] = i;
 673                 data[1] = (cache[i] & 0xFF00) >> 8;
 674                 data[2] = cache[i] & 0x00FF;
 675                 ret = codec->hw_write(codec->control_data, data, 3);
 676                 if (ret < 0)
 677                         goto error_ret;
 678                 else if (ret != 3) {
 679                         ret = -EIO;
 680                         goto error_ret;
 681                 }
 682         }
 683         ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 684
 685 error_ret:
 686         return ret;
 687 }
 688
 689 static int wm8940_probe(struct snd_soc_codec *codec)
 690 {
 691         struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 692         struct wm8940_setup_data *pdata = codec->dev->platform_data;
 693         int ret;
 694         u16 reg;
 695
 696         codec->control_data = wm8940->control_data;
 697         ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
 698         if (ret < 0) {
 699                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 700                 return ret;
 701         }
 702
 703         ret = wm8940_reset(codec);
 704         if (ret < 0) {
 705                 dev_err(codec->dev, "Failed to issue reset\n");
 706                 return ret;
 707         }
 708
 709         wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 710
 711         ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
 712         if (ret < 0)
 713                 return ret;
 714
 715         if (!pdata)
 716                 dev_warn(codec->dev, "No platform data supplied\n");
 717         else {
 718                 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
 719                 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
 720                 if (ret < 0)
 721                         return ret;
 722         }
 723
 724         ret = snd_soc_add_controls(codec, wm8940_snd_controls,
 725                              ARRAY_SIZE(wm8940_snd_controls));
 726         if (ret)
 727                 return ret;
 728         ret = wm8940_add_widgets(codec);
 729         return ret;
 730 }
 731
 732 static int wm8940_remove(struct snd_soc_codec *codec)
 733 {
 734         wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
 735         return 0;
 736 }
 737
 738 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
 739         .probe =        wm8940_probe,
 740         .remove =       wm8940_remove,
 741         .suspend =      wm8940_suspend,
 742         .resume =       wm8940_resume,
 743         .set_bias_level = wm8940_set_bias_level,
 744         .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
 745         .reg_word_size = sizeof(u16),
 746         .reg_cache_default = wm8940_reg_defaults,
 747 };
 748
 749 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 750 static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
 751                                       const struct i2c_device_id *id)
 752 {
 753         struct wm8940_priv *wm8940;
 754         int ret;
 755
 756         wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
 757         if (wm8940 == NULL)
 758                 return -ENOMEM;
 759
 760         i2c_set_clientdata(i2c, wm8940);
 761         wm8940->control_data = i2c;
 762         wm8940->control_type = SND_SOC_I2C;
 763
 764         ret = snd_soc_register_codec(&i2c->dev,
 765                         &soc_codec_dev_wm8940, &wm8940_dai, 1);
 766         if (ret < 0)
 767                 kfree(wm8940);
 768         return ret;
 769 }
 770
 771 static __devexit int wm8940_i2c_remove(struct i2c_client *client)
 772 {
 773         snd_soc_unregister_codec(&client->dev);
 774         kfree(i2c_get_clientdata(client));
 775         return 0;
 776 }
 777
 778 static const struct i2c_device_id wm8940_i2c_id[] = {
 779         { "wm8940", 0 },
 780         { }
 781 };
 782 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
 783
 784 static struct i2c_driver wm8940_i2c_driver = {
 785         .driver = {
 786                 .name = "wm8940-codec",
 787                 .owner = THIS_MODULE,
 788         },
 789         .probe =    wm8940_i2c_probe,
 790         .remove =   __devexit_p(wm8940_i2c_remove),
 791         .id_table = wm8940_i2c_id,
 792 };
 793 #endif
 794
 795 static int __init wm8940_modinit(void)
 796 {
 797         int ret = 0;
 798 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 799         ret = i2c_add_driver(&wm8940_i2c_driver);
 800         if (ret != 0) {
 801                 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
 802                        ret);
 803         }
 804 #endif
 805         return ret;
 806 }
 807 module_init(wm8940_modinit);
 808
 809 static void __exit wm8940_exit(void)
 810 {
 811 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 812         i2c_del_driver(&wm8940_i2c_driver);
 813 #endif
 814 }
 815 module_exit(wm8940_exit);
 816
 817 MODULE_DESCRIPTION("ASoC WM8940 driver");
 818 MODULE_AUTHOR("Jonathan Cameron");
 819 MODULE_LICENSE("GPL");