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/soc-dapm.h>
  39 #include <sound/initval.h>
  40 #include <sound/tlv.h>
  41
  42 #include "wm8940.h"
  43
  44 struct wm8940_priv {
  45         unsigned int sysclk;
  46         u16 reg_cache[WM8940_CACHEREGNUM];
  47         enum snd_soc_control_type control_type;
  48         void *control_data;
  49 };
  50
  51 static u16 wm8940_reg_defaults[] = {
  52         0x8940, /* Soft Reset */
  53         0x0000, /* Power 1 */
  54         0x0000, /* Power 2 */
  55         0x0000, /* Power 3 */
  56         0x0010, /* Interface Control */
  57         0x0000, /* Companding Control */
  58         0x0140, /* Clock Control */
  59         0x0000, /* Additional Controls */
  60         0x0000, /* GPIO Control */
  61         0x0002, /* Auto Increment Control */
  62         0x0000, /* DAC Control */
  63         0x00FF, /* DAC Volume */
  64         0,
  65         0,
  66         0x0100, /* ADC Control */
  67         0x00FF, /* ADC Volume */
  68         0x0000, /* Notch Filter 1 Control 1 */
  69         0x0000, /* Notch Filter 1 Control 2 */
  70         0x0000, /* Notch Filter 2 Control 1 */
  71         0x0000, /* Notch Filter 2 Control 2 */
  72         0x0000, /* Notch Filter 3 Control 1 */
  73         0x0000, /* Notch Filter 3 Control 2 */
  74         0x0000, /* Notch Filter 4 Control 1 */
  75         0x0000, /* Notch Filter 4 Control 2 */
  76         0x0032, /* DAC Limit Control 1 */
  77         0x0000, /* DAC Limit Control 2 */
  78         0,
  79         0,
  80         0,
  81         0,
  82         0,
  83         0,
  84         0x0038, /* ALC Control 1 */
  85         0x000B, /* ALC Control 2 */
  86         0x0032, /* ALC Control 3 */
  87         0x0000, /* Noise Gate */
  88         0x0041, /* PLLN */
  89         0x000C, /* PLLK1 */
  90         0x0093, /* PLLK2 */
  91         0x00E9, /* PLLK3 */
  92         0,
  93         0,
  94         0x0030, /* ALC Control 4 */
  95         0,
  96         0x0002, /* Input Control */
  97         0x0050, /* PGA Gain */
  98         0,
  99         0x0002, /* ADC Boost Control */
 100         0,
 101         0x0002, /* Output Control */
 102         0x0000, /* Speaker Mixer Control */
 103         0,
 104         0,
 105         0,
 106         0x0079, /* Speaker Volume */
 107         0,
 108         0x0000, /* Mono Mixer Control */
 109 };
 110
 111 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
 112 static const struct soc_enum wm8940_adc_companding_enum
 113 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
 114 static const struct soc_enum wm8940_dac_companding_enum
 115 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
 116
 117 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
 118 static const struct soc_enum wm8940_alc_mode_enum
 119 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
 120
 121 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
 122 static const struct soc_enum wm8940_mic_bias_level_enum
 123 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
 124
 125 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
 126 static const struct soc_enum wm8940_filter_mode_enum
 127 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
 128
 129 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
 130 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
 131 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
 132 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
 133 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
 134 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
 135 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
 136 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
 137 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
 138 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
 139
 140 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
 141         SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
 142                    6, 1, 0),
 143         SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
 144         SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
 145
 146         SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
 147         SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
 148         SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
 149                        3, 7, 1, wm8940_alc_max_tlv),
 150         SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
 151                        0, 7, 0, wm8940_alc_min_tlv),
 152         SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
 153                        0, 14, 0, wm8940_alc_tar_tlv),
 154         SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
 155         SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
 156         SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
 157         SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
 158         SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
 159                    3, 1, 0),
 160         SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
 161                    0, 7, 0),
 162
 163         SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
 164         SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
 165         SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
 166         SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
 167                        4, 9, 1, wm8940_lim_thresh_tlv),
 168         SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
 169                        0, 12, 0, wm8940_lim_boost_tlv),
 170
 171         SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
 172         SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
 173                        0, 63, 0, wm8940_pga_vol_tlv),
 174         SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
 175                        0, 255, 0, wm8940_adc_tlv),
 176         SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
 177                        0, 255, 0, wm8940_adc_tlv),
 178         SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
 179         SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
 180                        8, 1, 0, wm8940_capture_boost_vol_tlv),
 181         SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
 182                        0, 63, 0, wm8940_spk_vol_tlv),
 183         SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL,  6, 1, 1),
 184
 185         SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
 186                        8, 1, 1, wm8940_att_tlv),
 187         SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
 188
 189         SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
 190         SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
 191                        7, 1, 1, wm8940_att_tlv),
 192
 193         SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
 194         SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
 195         SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
 196         SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
 197         SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
 198         SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
 199         SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
 200 };
 201
 202 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
 203         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
 204         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
 205         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
 206 };
 207
 208 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
 209         SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
 210         SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
 211         SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
 212 };
 213
 214 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
 215 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
 216         SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
 217         SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
 218                             0, 7, 0, wm8940_boost_vol_tlv),
 219         SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
 220                             4, 7, 0, wm8940_boost_vol_tlv),
 221 };
 222
 223 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
 224         SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
 225         SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
 226         SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
 227 };
 228
 229 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
 230         SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
 231                            &wm8940_speaker_mixer_controls[0],
 232                            ARRAY_SIZE(wm8940_speaker_mixer_controls)),
 233         SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
 234                            &wm8940_mono_mixer_controls[0],
 235                            ARRAY_SIZE(wm8940_mono_mixer_controls)),
 236         SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
 237
 238         SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
 239         SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
 240         SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
 241         SND_SOC_DAPM_OUTPUT("MONOOUT"),
 242         SND_SOC_DAPM_OUTPUT("SPKOUTP"),
 243         SND_SOC_DAPM_OUTPUT("SPKOUTN"),
 244
 245         SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
 246         SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
 247         SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
 248                            &wm8940_micpga_controls[0],
 249                            ARRAY_SIZE(wm8940_micpga_controls)),
 250         SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
 251                            &wm8940_input_boost_controls[0],
 252                            ARRAY_SIZE(wm8940_input_boost_controls)),
 253         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
 254
 255         SND_SOC_DAPM_INPUT("MICN"),
 256         SND_SOC_DAPM_INPUT("MICP"),
 257         SND_SOC_DAPM_INPUT("AUX"),
 258 };
 259
 260 static const struct snd_soc_dapm_route audio_map[] = {
 261         /* Mono output mixer */
 262         {"Mono Mixer", "PCM Playback Switch", "DAC"},
 263         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
 264         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
 265
 266         /* Speaker output mixer */
 267         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
 268         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
 269         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
 270
 271         /* Outputs */
 272         {"Mono Out", NULL, "Mono Mixer"},
 273         {"MONOOUT", NULL, "Mono Out"},
 274         {"SpkN Out", NULL, "Speaker Mixer"},
 275         {"SpkP Out", NULL, "Speaker Mixer"},
 276         {"SPKOUTN", NULL, "SpkN Out"},
 277         {"SPKOUTP", NULL, "SpkP Out"},
 278
 279         /*  Microphone PGA */
 280         {"Mic PGA", "MICN Switch", "MICN"},
 281         {"Mic PGA", "MICP Switch", "MICP"},
 282         {"Mic PGA", "AUX Switch", "AUX"},
 283
 284         /* Boost Mixer */
 285         {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
 286         {"Boost Mixer", "Mic Volume",  "MICP"},
 287         {"Boost Mixer", "Aux Volume", "Aux Input"},
 288
 289         {"ADC", NULL, "Boost Mixer"},
 290 };
 291
 292 static int wm8940_add_widgets(struct snd_soc_codec *codec)
 293 {
 294         struct snd_soc_dapm_context *dapm = &codec->dapm;
 295         int ret;
 296
 297         ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets,
 298                                         ARRAY_SIZE(wm8940_dapm_widgets));
 299         if (ret)
 300                 goto error_ret;
 301         ret = snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 302         if (ret)
 303                 goto error_ret;
 304
 305 error_ret:
 306         return ret;
 307 }
 308
 309 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
 310
 311 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
 312                               unsigned int fmt)
 313 {
 314         struct snd_soc_codec *codec = codec_dai->codec;
 315         u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
 316         u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
 317
 318         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 319         case SND_SOC_DAIFMT_CBM_CFM:
 320                 clk |= 1;
 321                 break;
 322         case SND_SOC_DAIFMT_CBS_CFS:
 323                 break;
 324         default:
 325                 return -EINVAL;
 326         }
 327         snd_soc_write(codec, WM8940_CLOCK, clk);
 328
 329         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 330         case SND_SOC_DAIFMT_I2S:
 331                 iface |= (2 << 3);
 332                 break;
 333         case SND_SOC_DAIFMT_LEFT_J:
 334                 iface |= (1 << 3);
 335                 break;
 336         case SND_SOC_DAIFMT_RIGHT_J:
 337                 break;
 338         case SND_SOC_DAIFMT_DSP_A:
 339                 iface |= (3 << 3);
 340                 break;
 341         case SND_SOC_DAIFMT_DSP_B:
 342                 iface |= (3 << 3) | (1 << 7);
 343                 break;
 344         }
 345
 346         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 347         case SND_SOC_DAIFMT_NB_NF:
 348                 break;
 349         case SND_SOC_DAIFMT_NB_IF:
 350                 iface |= (1 << 7);
 351                 break;
 352         case SND_SOC_DAIFMT_IB_NF:
 353                 iface |= (1 << 8);
 354                 break;
 355         case SND_SOC_DAIFMT_IB_IF:
 356                 iface |= (1 << 8) | (1 << 7);
 357                 break;
 358         }
 359
 360         snd_soc_write(codec, WM8940_IFACE, iface);
 361
 362         return 0;
 363 }
 364
 365 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
 366                                 struct snd_pcm_hw_params *params,
 367                                 struct snd_soc_dai *dai)
 368 {
 369         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 370         struct snd_soc_codec *codec = rtd->codec;
 371         u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
 372         u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
 373         u16 companding =  snd_soc_read(codec,
 374                                                 WM8940_COMPANDINGCTL) & 0xFFDF;
 375         int ret;
 376
 377         /* LoutR control */
 378         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
 379             && params_channels(params) == 2)
 380                 iface |= (1 << 9);
 381
 382         switch (params_rate(params)) {
 383         case 8000:
 384                 addcntrl |= (0x5 << 1);
 385                 break;
 386         case 11025:
 387                 addcntrl |= (0x4 << 1);
 388                 break;
 389         case 16000:
 390                 addcntrl |= (0x3 << 1);
 391                 break;
 392         case 22050:
 393                 addcntrl |= (0x2 << 1);
 394                 break;
 395         case 32000:
 396                 addcntrl |= (0x1 << 1);
 397                 break;
 398         case 44100:
 399         case 48000:
 400                 break;
 401         }
 402         ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
 403         if (ret)
 404                 goto error_ret;
 405
 406         switch (params_format(params)) {
 407         case SNDRV_PCM_FORMAT_S8:
 408                 companding = companding | (1 << 5);
 409                 break;
 410         case SNDRV_PCM_FORMAT_S16_LE:
 411                 break;
 412         case SNDRV_PCM_FORMAT_S20_3LE:
 413                 iface |= (1 << 5);
 414                 break;
 415         case SNDRV_PCM_FORMAT_S24_LE:
 416                 iface |= (2 << 5);
 417                 break;
 418         case SNDRV_PCM_FORMAT_S32_LE:
 419                 iface |= (3 << 5);
 420                 break;
 421         }
 422         ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
 423         if (ret)
 424                 goto error_ret;
 425         ret = snd_soc_write(codec, WM8940_IFACE, iface);
 426
 427 error_ret:
 428         return ret;
 429 }
 430
 431 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
 432 {
 433         struct snd_soc_codec *codec = dai->codec;
 434         u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
 435
 436         if (mute)
 437                 mute_reg |= 0x40;
 438
 439         return snd_soc_write(codec, WM8940_DAC, mute_reg);
 440 }
 441
 442 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
 443                                  enum snd_soc_bias_level level)
 444 {
 445         u16 val;
 446         u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
 447         int ret = 0;
 448
 449         switch (level) {
 450         case SND_SOC_BIAS_ON:
 451                 /* ensure bufioen and biasen */
 452                 pwr_reg |= (1 << 2) | (1 << 3);
 453                 /* Enable thermal shutdown */
 454                 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
 455                 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
 456                 if (ret)
 457                         break;
 458                 /* set vmid to 75k */
 459                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
 460                 break;
 461         case SND_SOC_BIAS_PREPARE:
 462                 /* ensure bufioen and biasen */
 463                 pwr_reg |= (1 << 2) | (1 << 3);
 464                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
 465                 break;
 466         case SND_SOC_BIAS_STANDBY:
 467                 /* ensure bufioen and biasen */
 468                 pwr_reg |= (1 << 2) | (1 << 3);
 469                 /* set vmid to 300k for standby */
 470                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
 471                 break;
 472         case SND_SOC_BIAS_OFF:
 473                 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
 474                 break;
 475         }
 476
 477         return ret;
 478 }
 479
 480 struct pll_ {
 481         unsigned int pre_scale:2;
 482         unsigned int n:4;
 483         unsigned int k;
 484 };
 485
 486 static struct pll_ pll_div;
 487
 488 /* The size in bits of the pll divide multiplied by 10
 489  * to allow rounding later */
 490 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 491 static void pll_factors(unsigned int target, unsigned int source)
 492 {
 493         unsigned long long Kpart;
 494         unsigned int K, Ndiv, Nmod;
 495         /* The left shift ist to avoid accuracy loss when right shifting */
 496         Ndiv = target / source;
 497
 498         if (Ndiv > 12) {
 499                 source <<= 1;
 500                 /* Multiply by 2 */
 501                 pll_div.pre_scale = 0;
 502                 Ndiv = target / source;
 503         } else if (Ndiv < 3) {
 504                 source >>= 2;
 505                 /* Divide by 4 */
 506                 pll_div.pre_scale = 3;
 507                 Ndiv = target / source;
 508         } else if (Ndiv < 6) {
 509                 source >>= 1;
 510                 /* divide by 2 */
 511                 pll_div.pre_scale = 2;
 512                 Ndiv = target / source;
 513         } else
 514                 pll_div.pre_scale = 1;
 515
 516         if ((Ndiv < 6) || (Ndiv > 12))
 517                 printk(KERN_WARNING
 518                         "WM8940 N value %d outwith recommended range!d\n",
 519                         Ndiv);
 520
 521         pll_div.n = Ndiv;
 522         Nmod = target % source;
 523         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 524
 525         do_div(Kpart, source);
 526
 527         K = Kpart & 0xFFFFFFFF;
 528
 529         /* Check if we need to round */
 530         if ((K % 10) >= 5)
 531                 K += 5;
 532
 533         /* Move down to proper range now rounding is done */
 534         K /= 10;
 535
 536         pll_div.k = K;
 537 }
 538
 539 /* Untested at the moment */
 540 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 541                 int source, unsigned int freq_in, unsigned int freq_out)
 542 {
 543         struct snd_soc_codec *codec = codec_dai->codec;
 544         u16 reg;
 545
 546         /* Turn off PLL */
 547         reg = snd_soc_read(codec, WM8940_POWER1);
 548         snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
 549
 550         if (freq_in == 0 || freq_out == 0) {
 551                 /* Clock CODEC directly from MCLK */
 552                 reg = snd_soc_read(codec, WM8940_CLOCK);
 553                 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
 554                 /* Pll power down */
 555                 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
 556                 return 0;
 557         }
 558
 559         /* Pll is followed by a frequency divide by 4 */
 560         pll_factors(freq_out*4, freq_in);
 561         if (pll_div.k)
 562                 snd_soc_write(codec, WM8940_PLLN,
 563                              (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
 564         else /* No factional component */
 565                 snd_soc_write(codec, WM8940_PLLN,
 566                              (pll_div.pre_scale << 4) | pll_div.n);
 567         snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
 568         snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
 569         snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
 570         /* Enable the PLL */
 571         reg = snd_soc_read(codec, WM8940_POWER1);
 572         snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
 573
 574         /* Run CODEC from PLL instead of MCLK */
 575         reg = snd_soc_read(codec, WM8940_CLOCK);
 576         snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
 577
 578         return 0;
 579 }
 580
 581 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 582                                  int clk_id, unsigned int freq, int dir)
 583 {
 584         struct snd_soc_codec *codec = codec_dai->codec;
 585         struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 586
 587         switch (freq) {
 588         case 11289600:
 589         case 12000000:
 590         case 12288000:
 591         case 16934400:
 592         case 18432000:
 593                 wm8940->sysclk = freq;
 594                 return 0;
 595         }
 596         return -EINVAL;
 597 }
 598
 599 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 600                                  int div_id, int div)
 601 {
 602         struct snd_soc_codec *codec = codec_dai->codec;
 603         u16 reg;
 604         int ret = 0;
 605
 606         switch (div_id) {
 607         case WM8940_BCLKDIV:
 608                 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
 609                 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
 610                 break;
 611         case WM8940_MCLKDIV:
 612                 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
 613                 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
 614                 break;
 615         case WM8940_OPCLKDIV:
 616                 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
 617                 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
 618                 break;
 619         }
 620         return ret;
 621 }
 622
 623 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
 624
 625 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 |                           \
 626                         SNDRV_PCM_FMTBIT_S16_LE |                       \
 627                         SNDRV_PCM_FMTBIT_S20_3LE |                      \
 628                         SNDRV_PCM_FMTBIT_S24_LE |                       \
 629                         SNDRV_PCM_FMTBIT_S32_LE)
 630
 631 static struct snd_soc_dai_ops wm8940_dai_ops = {
 632         .hw_params = wm8940_i2s_hw_params,
 633         .set_sysclk = wm8940_set_dai_sysclk,
 634         .digital_mute = wm8940_mute,
 635         .set_fmt = wm8940_set_dai_fmt,
 636         .set_clkdiv = wm8940_set_dai_clkdiv,
 637         .set_pll = wm8940_set_dai_pll,
 638 };
 639
 640 static struct snd_soc_dai_driver wm8940_dai = {
 641         .name = "wm8940-hifi",
 642         .playback = {
 643                 .stream_name = "Playback",
 644                 .channels_min = 1,
 645                 .channels_max = 2,
 646                 .rates = WM8940_RATES,
 647                 .formats = WM8940_FORMATS,
 648         },
 649         .capture = {
 650                 .stream_name = "Capture",
 651                 .channels_min = 1,
 652                 .channels_max = 2,
 653                 .rates = WM8940_RATES,
 654                 .formats = WM8940_FORMATS,
 655         },
 656         .ops = &wm8940_dai_ops,
 657         .symmetric_rates = 1,
 658 };
 659
 660 static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
 661 {
 662         return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
 663 }
 664
 665 static int wm8940_resume(struct snd_soc_codec *codec)
 666 {
 667         int i;
 668         int ret;
 669         u8 data[3];
 670         u16 *cache = codec->reg_cache;
 671
 672         /* Sync reg_cache with the hardware
 673          * Could use auto incremented writes to speed this up
 674          */
 675         for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
 676                 data[0] = i;
 677                 data[1] = (cache[i] & 0xFF00) >> 8;
 678                 data[2] = cache[i] & 0x00FF;
 679                 ret = codec->hw_write(codec->control_data, data, 3);
 680                 if (ret < 0)
 681                         goto error_ret;
 682                 else if (ret != 3) {
 683                         ret = -EIO;
 684                         goto error_ret;
 685                 }
 686         }
 687         ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 688         if (ret)
 689                 goto error_ret;
 690
 691 error_ret:
 692         return ret;
 693 }
 694
 695 static int wm8940_probe(struct snd_soc_codec *codec)
 696 {
 697         struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 698         struct wm8940_setup_data *pdata = codec->dev->platform_data;
 699         int ret;
 700         u16 reg;
 701
 702         codec->control_data = wm8940->control_data;
 703         ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
 704         if (ret < 0) {
 705                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 706                 return ret;
 707         }
 708
 709         ret = wm8940_reset(codec);
 710         if (ret < 0) {
 711                 dev_err(codec->dev, "Failed to issue reset\n");
 712                 return ret;
 713         }
 714
 715         wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 716
 717         ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
 718         if (ret < 0)
 719                 return ret;
 720
 721         if (!pdata)
 722                 dev_warn(codec->dev, "No platform data supplied\n");
 723         else {
 724                 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
 725                 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
 726                 if (ret < 0)
 727                         return ret;
 728         }
 729
 730         ret = snd_soc_add_controls(codec, wm8940_snd_controls,
 731                              ARRAY_SIZE(wm8940_snd_controls));
 732         if (ret)
 733                 return ret;
 734         ret = wm8940_add_widgets(codec);
 735         if (ret)
 736                 return ret;
 737
 738         return ret;
 739 ;
 740 }
 741
 742 static int wm8940_remove(struct snd_soc_codec *codec)
 743 {
 744         wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
 745         return 0;
 746 }
 747
 748 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
 749         .probe =        wm8940_probe,
 750         .remove =       wm8940_remove,
 751         .suspend =      wm8940_suspend,
 752         .resume =       wm8940_resume,
 753         .set_bias_level = wm8940_set_bias_level,
 754         .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
 755         .reg_word_size = sizeof(u16),
 756         .reg_cache_default = wm8940_reg_defaults,
 757 };
 758
 759 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 760 static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
 761                                       const struct i2c_device_id *id)
 762 {
 763         struct wm8940_priv *wm8940;
 764         int ret;
 765
 766         wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
 767         if (wm8940 == NULL)
 768                 return -ENOMEM;
 769
 770         i2c_set_clientdata(i2c, wm8940);
 771         wm8940->control_data = i2c;
 772
 773         ret = snd_soc_register_codec(&i2c->dev,
 774                         &soc_codec_dev_wm8940, &wm8940_dai, 1);
 775         if (ret < 0)
 776                 kfree(wm8940);
 777         return ret;
 778 }
 779
 780 static __devexit int wm8940_i2c_remove(struct i2c_client *client)
 781 {
 782         snd_soc_unregister_codec(&client->dev);
 783         kfree(i2c_get_clientdata(client));
 784         return 0;
 785 }
 786
 787 static const struct i2c_device_id wm8940_i2c_id[] = {
 788         { "wm8940", 0 },
 789         { }
 790 };
 791 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
 792
 793 static struct i2c_driver wm8940_i2c_driver = {
 794         .driver = {
 795                 .name = "wm8940-codec",
 796                 .owner = THIS_MODULE,
 797         },
 798         .probe =    wm8940_i2c_probe,
 799         .remove =   __devexit_p(wm8940_i2c_remove),
 800         .id_table = wm8940_i2c_id,
 801 };
 802 #endif
 803
 804 static int __init wm8940_modinit(void)
 805 {
 806         int ret = 0;
 807 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 808         ret = i2c_add_driver(&wm8940_i2c_driver);
 809         if (ret != 0) {
 810                 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
 811                        ret);
 812         }
 813 #endif
 814         return ret;
 815 }
 816 module_init(wm8940_modinit);
 817
 818 static void __exit wm8940_exit(void)
 819 {
 820 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 821         i2c_del_driver(&wm8940_i2c_driver);
 822 #endif
 823 }
 824 module_exit(wm8940_exit);
 825
 826 MODULE_DESCRIPTION("ASoC WM8940 driver");
 827 MODULE_AUTHOR("Jonathan Cameron");
 828 MODULE_LICENSE("GPL");