sound/soc/codecs/wm8960.c

   1 /*
   2  * wm8960.c  --  WM8960 ALSA SoC Audio driver
   3  *
   4  * Author: Liam Girdwood
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/init.h>
  14 #include <linux/delay.h>
  15 #include <linux/pm.h>
  16 #include <linux/i2c.h>
  17 #include <linux/platform_device.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/soc.h>
  22 #include <sound/soc-dapm.h>
  23 #include <sound/initval.h>
  24 #include <sound/tlv.h>
  25
  26 #include "wm8960.h"
  27
  28 #define AUDIO_NAME "wm8960"
  29
  30 struct snd_soc_codec_device soc_codec_dev_wm8960;
  31
  32 /* R25 - Power 1 */
  33 #define WM8960_VREF      0x40
  34
  35 /* R28 - Anti-pop 1 */
  36 #define WM8960_POBCTRL   0x80
  37 #define WM8960_BUFDCOPEN 0x10
  38 #define WM8960_BUFIOEN   0x08
  39 #define WM8960_SOFT_ST   0x04
  40 #define WM8960_HPSTBY    0x01
  41
  42 /* R29 - Anti-pop 2 */
  43 #define WM8960_DISOP     0x40
  44
  45 /*
  46  * wm8960 register cache
  47  * We can't read the WM8960 register space when we are
  48  * using 2 wire for device control, so we cache them instead.
  49  */
  50 static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
  51         0x0097, 0x0097, 0x0000, 0x0000,
  52         0x0000, 0x0008, 0x0000, 0x000a,
  53         0x01c0, 0x0000, 0x00ff, 0x00ff,
  54         0x0000, 0x0000, 0x0000, 0x0000,
  55         0x0000, 0x007b, 0x0100, 0x0032,
  56         0x0000, 0x00c3, 0x00c3, 0x01c0,
  57         0x0000, 0x0000, 0x0000, 0x0000,
  58         0x0000, 0x0000, 0x0000, 0x0000,
  59         0x0100, 0x0100, 0x0050, 0x0050,
  60         0x0050, 0x0050, 0x0000, 0x0000,
  61         0x0000, 0x0000, 0x0040, 0x0000,
  62         0x0000, 0x0050, 0x0050, 0x0000,
  63         0x0002, 0x0037, 0x004d, 0x0080,
  64         0x0008, 0x0031, 0x0026, 0x00e9,
  65 };
  66
  67 struct wm8960_priv {
  68         u16 reg_cache[WM8960_CACHEREGNUM];
  69         struct snd_soc_codec codec;
  70 };
  71
  72 /*
  73  * read wm8960 register cache
  74  */
  75 static inline unsigned int wm8960_read_reg_cache(struct snd_soc_codec *codec,
  76         unsigned int reg)
  77 {
  78         u16 *cache = codec->reg_cache;
  79         if (reg == WM8960_RESET)
  80                 return 0;
  81         if (reg >= WM8960_CACHEREGNUM)
  82                 return -1;
  83         return cache[reg];
  84 }
  85
  86 /*
  87  * write wm8960 register cache
  88  */
  89 static inline void wm8960_write_reg_cache(struct snd_soc_codec *codec,
  90         u16 reg, unsigned int value)
  91 {
  92         u16 *cache = codec->reg_cache;
  93         if (reg >= WM8960_CACHEREGNUM)
  94                 return;
  95         cache[reg] = value;
  96 }
  97
  98 static inline unsigned int wm8960_read(struct snd_soc_codec *codec,
  99         unsigned int reg)
 100 {
 101         return wm8960_read_reg_cache(codec, reg);
 102 }
 103
 104 /*
 105  * write to the WM8960 register space
 106  */
 107 static int wm8960_write(struct snd_soc_codec *codec, unsigned int reg,
 108         unsigned int value)
 109 {
 110         u8 data[2];
 111
 112         /* data is
 113          *   D15..D9 WM8960 register offset
 114          *   D8...D0 register data
 115          */
 116         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
 117         data[1] = value & 0x00ff;
 118
 119         wm8960_write_reg_cache(codec, reg, value);
 120         if (codec->hw_write(codec->control_data, data, 2) == 2)
 121                 return 0;
 122         else
 123                 return -EIO;
 124 }
 125
 126 #define wm8960_reset(c) wm8960_write(c, WM8960_RESET, 0)
 127
 128 /* enumerated controls */
 129 static const char *wm8960_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 130 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
 131         "Right Inverted", "Stereo Inversion"};
 132 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
 133 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
 134 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
 135 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
 136
 137 static const struct soc_enum wm8960_enum[] = {
 138         SOC_ENUM_SINGLE(WM8960_DACCTL1, 1, 4, wm8960_deemph),
 139         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
 140         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
 141         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
 142         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
 143         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 144         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 145 };
 146
 147 static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
 148 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
 149 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
 150 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 151
 152 static const struct snd_kcontrol_new wm8960_snd_controls[] = {
 153 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
 154                  0, 63, 0, adc_tlv),
 155 SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
 156         6, 1, 0),
 157 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
 158         7, 1, 0),
 159
 160 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
 161                  0, 255, 0, dac_tlv),
 162
 163 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
 164                  0, 127, 0, out_tlv),
 165 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
 166         7, 1, 0),
 167
 168 SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
 169                  0, 127, 0, out_tlv),
 170 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
 171         7, 1, 0),
 172 SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
 173 SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
 174
 175 SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
 176 SOC_ENUM("ADC Polarity", wm8960_enum[1]),
 177 SOC_ENUM("Playback De-emphasis", wm8960_enum[0]),
 178 SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
 179
 180 SOC_ENUM("DAC Polarity", wm8960_enum[2]),
 181
 182 SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[3]),
 183 SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[4]),
 184 SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
 185 SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
 186
 187 SOC_ENUM("ALC Function", wm8960_enum[5]),
 188 SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
 189 SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
 190 SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
 191 SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
 192 SOC_ENUM("ALC Mode", wm8960_enum[6]),
 193 SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
 194 SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
 195
 196 SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
 197 SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
 198
 199 SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
 200         0, 127, 0),
 201
 202 SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
 203                WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
 204 SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
 205                WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
 206 SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
 207                WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
 208 SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
 209                WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
 210 };
 211
 212 static const struct snd_kcontrol_new wm8960_lin_boost[] = {
 213 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
 214 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
 215 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
 216 };
 217
 218 static const struct snd_kcontrol_new wm8960_lin[] = {
 219 SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
 220 };
 221
 222 static const struct snd_kcontrol_new wm8960_rin_boost[] = {
 223 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
 224 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
 225 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
 226 };
 227
 228 static const struct snd_kcontrol_new wm8960_rin[] = {
 229 SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
 230 };
 231
 232 static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
 233 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
 234 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
 235 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
 236 };
 237
 238 static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
 239 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
 240 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
 241 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
 242 };
 243
 244 static const struct snd_kcontrol_new wm8960_mono_out[] = {
 245 SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
 246 SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
 247 };
 248
 249 static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
 250 SND_SOC_DAPM_INPUT("LINPUT1"),
 251 SND_SOC_DAPM_INPUT("RINPUT1"),
 252 SND_SOC_DAPM_INPUT("LINPUT2"),
 253 SND_SOC_DAPM_INPUT("RINPUT2"),
 254 SND_SOC_DAPM_INPUT("LINPUT3"),
 255 SND_SOC_DAPM_INPUT("RINPUT3"),
 256
 257 SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
 258
 259 SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
 260                    wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
 261 SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
 262                    wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
 263
 264 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
 265                    wm8960_lin, ARRAY_SIZE(wm8960_lin)),
 266 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
 267                    wm8960_rin, ARRAY_SIZE(wm8960_rin)),
 268
 269 SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
 270 SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
 271
 272 SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
 273 SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
 274
 275 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
 276         &wm8960_loutput_mixer[0],
 277         ARRAY_SIZE(wm8960_loutput_mixer)),
 278 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
 279         &wm8960_routput_mixer[0],
 280         ARRAY_SIZE(wm8960_routput_mixer)),
 281
 282 SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
 283         &wm8960_mono_out[0],
 284         ARRAY_SIZE(wm8960_mono_out)),
 285
 286 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
 287 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
 288
 289 SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
 290 SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
 291
 292 SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
 293 SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
 294
 295 SND_SOC_DAPM_OUTPUT("SPK_LP"),
 296 SND_SOC_DAPM_OUTPUT("SPK_LN"),
 297 SND_SOC_DAPM_OUTPUT("HP_L"),
 298 SND_SOC_DAPM_OUTPUT("HP_R"),
 299 SND_SOC_DAPM_OUTPUT("SPK_RP"),
 300 SND_SOC_DAPM_OUTPUT("SPK_RN"),
 301 SND_SOC_DAPM_OUTPUT("OUT3"),
 302 };
 303
 304 static const struct snd_soc_dapm_route audio_paths[] = {
 305         { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
 306         { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
 307         { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
 308
 309         { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
 310         { "Left Input Mixer", NULL, "LINPUT1", },  /* Really Boost Switch */
 311         { "Left Input Mixer", NULL, "LINPUT2" },
 312         { "Left Input Mixer", NULL, "LINPUT3" },
 313
 314         { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
 315         { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
 316         { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
 317
 318         { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
 319         { "Right Input Mixer", NULL, "RINPUT1", },  /* Really Boost Switch */
 320         { "Right Input Mixer", NULL, "RINPUT2" },
 321         { "Right Input Mixer", NULL, "LINPUT3" },
 322
 323         { "Left ADC", NULL, "Left Input Mixer" },
 324         { "Right ADC", NULL, "Right Input Mixer" },
 325
 326         { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
 327         { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
 328         { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
 329
 330         { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
 331         { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
 332         { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
 333
 334         { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
 335         { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
 336
 337         { "LOUT1 PGA", NULL, "Left Output Mixer" },
 338         { "ROUT1 PGA", NULL, "Right Output Mixer" },
 339
 340         { "HP_L", NULL, "LOUT1 PGA" },
 341         { "HP_R", NULL, "ROUT1 PGA" },
 342
 343         { "Left Speaker PGA", NULL, "Left Output Mixer" },
 344         { "Right Speaker PGA", NULL, "Right Output Mixer" },
 345
 346         { "Left Speaker Output", NULL, "Left Speaker PGA" },
 347         { "Right Speaker Output", NULL, "Right Speaker PGA" },
 348
 349         { "SPK_LN", NULL, "Left Speaker Output" },
 350         { "SPK_LP", NULL, "Left Speaker Output" },
 351         { "SPK_RN", NULL, "Right Speaker Output" },
 352         { "SPK_RP", NULL, "Right Speaker Output" },
 353
 354         { "OUT3", NULL, "Mono Output Mixer", }
 355 };
 356
 357 static int wm8960_add_widgets(struct snd_soc_codec *codec)
 358 {
 359         snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets,
 360                                   ARRAY_SIZE(wm8960_dapm_widgets));
 361
 362         snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
 363
 364         snd_soc_dapm_new_widgets(codec);
 365         return 0;
 366 }
 367
 368 static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
 369                 unsigned int fmt)
 370 {
 371         struct snd_soc_codec *codec = codec_dai->codec;
 372         u16 iface = 0;
 373
 374         /* set master/slave audio interface */
 375         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 376         case SND_SOC_DAIFMT_CBM_CFM:
 377                 iface |= 0x0040;
 378                 break;
 379         case SND_SOC_DAIFMT_CBS_CFS:
 380                 break;
 381         default:
 382                 return -EINVAL;
 383         }
 384
 385         /* interface format */
 386         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 387         case SND_SOC_DAIFMT_I2S:
 388                 iface |= 0x0002;
 389                 break;
 390         case SND_SOC_DAIFMT_RIGHT_J:
 391                 break;
 392         case SND_SOC_DAIFMT_LEFT_J:
 393                 iface |= 0x0001;
 394                 break;
 395         case SND_SOC_DAIFMT_DSP_A:
 396                 iface |= 0x0003;
 397                 break;
 398         case SND_SOC_DAIFMT_DSP_B:
 399                 iface |= 0x0013;
 400                 break;
 401         default:
 402                 return -EINVAL;
 403         }
 404
 405         /* clock inversion */
 406         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 407         case SND_SOC_DAIFMT_NB_NF:
 408                 break;
 409         case SND_SOC_DAIFMT_IB_IF:
 410                 iface |= 0x0090;
 411                 break;
 412         case SND_SOC_DAIFMT_IB_NF:
 413                 iface |= 0x0080;
 414                 break;
 415         case SND_SOC_DAIFMT_NB_IF:
 416                 iface |= 0x0010;
 417                 break;
 418         default:
 419                 return -EINVAL;
 420         }
 421
 422         /* set iface */
 423         wm8960_write(codec, WM8960_IFACE1, iface);
 424         return 0;
 425 }
 426
 427 static int wm8960_hw_params(struct snd_pcm_substream *substream,
 428                             struct snd_pcm_hw_params *params,
 429                             struct snd_soc_dai *dai)
 430 {
 431         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 432         struct snd_soc_device *socdev = rtd->socdev;
 433         struct snd_soc_codec *codec = socdev->card->codec;
 434         u16 iface = wm8960_read(codec, WM8960_IFACE1) & 0xfff3;
 435
 436         /* bit size */
 437         switch (params_format(params)) {
 438         case SNDRV_PCM_FORMAT_S16_LE:
 439                 break;
 440         case SNDRV_PCM_FORMAT_S20_3LE:
 441                 iface |= 0x0004;
 442                 break;
 443         case SNDRV_PCM_FORMAT_S24_LE:
 444                 iface |= 0x0008;
 445                 break;
 446         }
 447
 448         /* set iface */
 449         wm8960_write(codec, WM8960_IFACE1, iface);
 450         return 0;
 451 }
 452
 453 static int wm8960_mute(struct snd_soc_dai *dai, int mute)
 454 {
 455         struct snd_soc_codec *codec = dai->codec;
 456         u16 mute_reg = wm8960_read(codec, WM8960_DACCTL1) & 0xfff7;
 457
 458         if (mute)
 459                 wm8960_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
 460         else
 461                 wm8960_write(codec, WM8960_DACCTL1, mute_reg);
 462         return 0;
 463 }
 464
 465 static int wm8960_set_bias_level(struct snd_soc_codec *codec,
 466                                  enum snd_soc_bias_level level)
 467 {
 468         struct wm8960_data *pdata = codec->dev->platform_data;
 469         u16 reg;
 470
 471         switch (level) {
 472         case SND_SOC_BIAS_ON:
 473                 break;
 474
 475         case SND_SOC_BIAS_PREPARE:
 476                 /* Set VMID to 2x50k */
 477                 reg = wm8960_read(codec, WM8960_POWER1);
 478                 reg &= ~0x180;
 479                 reg |= 0x80;
 480                 wm8960_write(codec, WM8960_POWER1, reg);
 481                 break;
 482
 483         case SND_SOC_BIAS_STANDBY:
 484                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 485                         /* Enable anti-pop features */
 486                         wm8960_write(codec, WM8960_APOP1,
 487                                      WM8960_POBCTRL | WM8960_SOFT_ST |
 488                                      WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 489
 490                         /* Discharge HP output */
 491                         reg = WM8960_DISOP;
 492                         if (pdata)
 493                                 reg |= pdata->dres << 4;
 494                         wm8960_write(codec, WM8960_APOP2, reg);
 495
 496                         msleep(400);
 497
 498                         wm8960_write(codec, WM8960_APOP2, 0);
 499
 500                         /* Enable & ramp VMID at 2x50k */
 501                         reg = wm8960_read(codec, WM8960_POWER1);
 502                         reg |= 0x80;
 503                         wm8960_write(codec, WM8960_POWER1, reg);
 504                         msleep(100);
 505
 506                         /* Enable VREF */
 507                         wm8960_write(codec, WM8960_POWER1, reg | WM8960_VREF);
 508
 509                         /* Disable anti-pop features */
 510                         wm8960_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
 511                 }
 512
 513                 /* Set VMID to 2x250k */
 514                 reg = wm8960_read(codec, WM8960_POWER1);
 515                 reg &= ~0x180;
 516                 reg |= 0x100;
 517                 wm8960_write(codec, WM8960_POWER1, reg);
 518                 break;
 519
 520         case SND_SOC_BIAS_OFF:
 521                 /* Enable anti-pop features */
 522                 wm8960_write(codec, WM8960_APOP1,
 523                              WM8960_POBCTRL | WM8960_SOFT_ST |
 524                              WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 525
 526                 /* Disable VMID and VREF, let them discharge */
 527                 wm8960_write(codec, WM8960_POWER1, 0);
 528                 msleep(600);
 529
 530                 wm8960_write(codec, WM8960_APOP1, 0);
 531                 break;
 532         }
 533
 534         codec->bias_level = level;
 535
 536         return 0;
 537 }
 538
 539 /* PLL divisors */
 540 struct _pll_div {
 541         u32 pre_div:1;
 542         u32 n:4;
 543         u32 k:24;
 544 };
 545
 546 /* The size in bits of the pll divide multiplied by 10
 547  * to allow rounding later */
 548 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 549
 550 static int pll_factors(unsigned int source, unsigned int target,
 551                        struct _pll_div *pll_div)
 552 {
 553         unsigned long long Kpart;
 554         unsigned int K, Ndiv, Nmod;
 555
 556         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
 557
 558         /* Scale up target to PLL operating frequency */
 559         target *= 4;
 560
 561         Ndiv = target / source;
 562         if (Ndiv < 6) {
 563                 source >>= 1;
 564                 pll_div->pre_div = 1;
 565                 Ndiv = target / source;
 566         } else
 567                 pll_div->pre_div = 0;
 568
 569         if ((Ndiv < 6) || (Ndiv > 12)) {
 570                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
 571                 return -EINVAL;
 572         }
 573
 574         pll_div->n = Ndiv;
 575         Nmod = target % source;
 576         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 577
 578         do_div(Kpart, source);
 579
 580         K = Kpart & 0xFFFFFFFF;
 581
 582         /* Check if we need to round */
 583         if ((K % 10) >= 5)
 584                 K += 5;
 585
 586         /* Move down to proper range now rounding is done */
 587         K /= 10;
 588
 589         pll_div->k = K;
 590
 591         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
 592                  pll_div->n, pll_div->k, pll_div->pre_div);
 593
 594         return 0;
 595 }
 596
 597 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai,
 598                 int pll_id, unsigned int freq_in, unsigned int freq_out)
 599 {
 600         struct snd_soc_codec *codec = codec_dai->codec;
 601         u16 reg;
 602         static struct _pll_div pll_div;
 603         int ret;
 604
 605         if (freq_in && freq_out) {
 606                 ret = pll_factors(freq_in, freq_out, &pll_div);
 607                 if (ret != 0)
 608                         return ret;
 609         }
 610
 611         /* Disable the PLL: even if we are changing the frequency the
 612          * PLL needs to be disabled while we do so. */
 613         wm8960_write(codec, WM8960_CLOCK1,
 614                      wm8960_read(codec, WM8960_CLOCK1) & ~1);
 615         wm8960_write(codec, WM8960_POWER2,
 616                      wm8960_read(codec, WM8960_POWER2) & ~1);
 617
 618         if (!freq_in || !freq_out)
 619                 return 0;
 620
 621         reg = wm8960_read(codec, WM8960_PLL1) & ~0x3f;
 622         reg |= pll_div.pre_div << 4;
 623         reg |= pll_div.n;
 624
 625         if (pll_div.k) {
 626                 reg |= 0x20;
 627
 628                 wm8960_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
 629                 wm8960_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
 630                 wm8960_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
 631         }
 632         wm8960_write(codec, WM8960_PLL1, reg);
 633
 634         /* Turn it on */
 635         wm8960_write(codec, WM8960_POWER2,
 636                      wm8960_read(codec, WM8960_POWER2) | 1);
 637         msleep(250);
 638         wm8960_write(codec, WM8960_CLOCK1,
 639                      wm8960_read(codec, WM8960_CLOCK1) | 1);
 640
 641         return 0;
 642 }
 643
 644 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 645                 int div_id, int div)
 646 {
 647         struct snd_soc_codec *codec = codec_dai->codec;
 648         u16 reg;
 649
 650         switch (div_id) {
 651         case WM8960_SYSCLKSEL:
 652                 reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1fe;
 653                 wm8960_write(codec, WM8960_CLOCK1, reg | div);
 654                 break;
 655         case WM8960_SYSCLKDIV:
 656                 reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1f9;
 657                 wm8960_write(codec, WM8960_CLOCK1, reg | div);
 658                 break;
 659         case WM8960_DACDIV:
 660                 reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1c7;
 661                 wm8960_write(codec, WM8960_CLOCK1, reg | div);
 662                 break;
 663         case WM8960_OPCLKDIV:
 664                 reg = wm8960_read(codec, WM8960_PLL1) & 0x03f;
 665                 wm8960_write(codec, WM8960_PLL1, reg | div);
 666                 break;
 667         case WM8960_DCLKDIV:
 668                 reg = wm8960_read(codec, WM8960_CLOCK2) & 0x03f;
 669                 wm8960_write(codec, WM8960_CLOCK2, reg | div);
 670                 break;
 671         case WM8960_TOCLKSEL:
 672                 reg = wm8960_read(codec, WM8960_ADDCTL1) & 0x1fd;
 673                 wm8960_write(codec, WM8960_ADDCTL1, reg | div);
 674                 break;
 675         default:
 676                 return -EINVAL;
 677         }
 678
 679         return 0;
 680 }
 681
 682 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
 683
 684 #define WM8960_FORMATS \
 685         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 686         SNDRV_PCM_FMTBIT_S24_LE)
 687
 688 static struct snd_soc_dai_ops wm8960_dai_ops = {
 689         .hw_params = wm8960_hw_params,
 690         .digital_mute = wm8960_mute,
 691         .set_fmt = wm8960_set_dai_fmt,
 692         .set_clkdiv = wm8960_set_dai_clkdiv,
 693         .set_pll = wm8960_set_dai_pll,
 694 };
 695
 696 struct snd_soc_dai wm8960_dai = {
 697         .name = "WM8960",
 698         .playback = {
 699                 .stream_name = "Playback",
 700                 .channels_min = 1,
 701                 .channels_max = 2,
 702                 .rates = WM8960_RATES,
 703                 .formats = WM8960_FORMATS,},
 704         .capture = {
 705                 .stream_name = "Capture",
 706                 .channels_min = 1,
 707                 .channels_max = 2,
 708                 .rates = WM8960_RATES,
 709                 .formats = WM8960_FORMATS,},
 710         .ops = &wm8960_dai_ops,
 711         .symmetric_rates = 1,
 712 };
 713 EXPORT_SYMBOL_GPL(wm8960_dai);
 714
 715 static int wm8960_suspend(struct platform_device *pdev, pm_message_t state)
 716 {
 717         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 718         struct snd_soc_codec *codec = socdev->card->codec;
 719
 720         wm8960_set_bias_level(codec, SND_SOC_BIAS_OFF);
 721         return 0;
 722 }
 723
 724 static int wm8960_resume(struct platform_device *pdev)
 725 {
 726         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 727         struct snd_soc_codec *codec = socdev->card->codec;
 728         int i;
 729         u8 data[2];
 730         u16 *cache = codec->reg_cache;
 731
 732         /* Sync reg_cache with the hardware */
 733         for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
 734                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 735                 data[1] = cache[i] & 0x00ff;
 736                 codec->hw_write(codec->control_data, data, 2);
 737         }
 738
 739         wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 740         wm8960_set_bias_level(codec, codec->suspend_bias_level);
 741         return 0;
 742 }
 743
 744 static struct snd_soc_codec *wm8960_codec;
 745
 746 static int wm8960_probe(struct platform_device *pdev)
 747 {
 748         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 749         struct snd_soc_codec *codec;
 750         int ret = 0;
 751
 752         if (wm8960_codec == NULL) {
 753                 dev_err(&pdev->dev, "Codec device not registered\n");
 754                 return -ENODEV;
 755         }
 756
 757         socdev->card->codec = wm8960_codec;
 758         codec = wm8960_codec;
 759
 760         /* register pcms */
 761         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 762         if (ret < 0) {
 763                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 764                 goto pcm_err;
 765         }
 766
 767         snd_soc_add_controls(codec, wm8960_snd_controls,
 768                              ARRAY_SIZE(wm8960_snd_controls));
 769         wm8960_add_widgets(codec);
 770         ret = snd_soc_init_card(socdev);
 771         if (ret < 0) {
 772                 dev_err(codec->dev, "failed to register card: %d\n", ret);
 773                 goto card_err;
 774         }
 775
 776         return ret;
 777
 778 card_err:
 779         snd_soc_free_pcms(socdev);
 780         snd_soc_dapm_free(socdev);
 781 pcm_err:
 782         return ret;
 783 }
 784
 785 /* power down chip */
 786 static int wm8960_remove(struct platform_device *pdev)
 787 {
 788         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 789
 790         snd_soc_free_pcms(socdev);
 791         snd_soc_dapm_free(socdev);
 792
 793         return 0;
 794 }
 795
 796 struct snd_soc_codec_device soc_codec_dev_wm8960 = {
 797         .probe =        wm8960_probe,
 798         .remove =       wm8960_remove,
 799         .suspend =      wm8960_suspend,
 800         .resume =       wm8960_resume,
 801 };
 802 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8960);
 803
 804 static int wm8960_register(struct wm8960_priv *wm8960)
 805 {
 806         struct wm8960_data *pdata = wm8960->codec.dev->platform_data;
 807         struct snd_soc_codec *codec = &wm8960->codec;
 808         int ret;
 809         u16 reg;
 810
 811         if (wm8960_codec) {
 812                 dev_err(codec->dev, "Another WM8960 is registered\n");
 813                 return -EINVAL;
 814         }
 815
 816         if (!pdata) {
 817                 dev_warn(codec->dev, "No platform data supplied\n");
 818         } else {
 819                 if (pdata->dres > WM8960_DRES_MAX) {
 820                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
 821                         pdata->dres = 0;
 822                 }
 823         }
 824
 825         mutex_init(&codec->mutex);
 826         INIT_LIST_HEAD(&codec->dapm_widgets);
 827         INIT_LIST_HEAD(&codec->dapm_paths);
 828
 829         codec->private_data = wm8960;
 830         codec->name = "WM8960";
 831         codec->owner = THIS_MODULE;
 832         codec->read = wm8960_read_reg_cache;
 833         codec->write = wm8960_write;
 834         codec->bias_level = SND_SOC_BIAS_OFF;
 835         codec->set_bias_level = wm8960_set_bias_level;
 836         codec->dai = &wm8960_dai;
 837         codec->num_dai = 1;
 838         codec->reg_cache_size = WM8960_CACHEREGNUM;
 839         codec->reg_cache = &wm8960->reg_cache;
 840
 841         memcpy(codec->reg_cache, wm8960_reg, sizeof(wm8960_reg));
 842
 843         ret = wm8960_reset(codec);
 844         if (ret < 0) {
 845                 dev_err(codec->dev, "Failed to issue reset\n");
 846                 return ret;
 847         }
 848
 849         wm8960_dai.dev = codec->dev;
 850
 851         wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 852
 853         /* Latch the update bits */
 854         reg = wm8960_read(codec, WM8960_LINVOL);
 855         wm8960_write(codec, WM8960_LINVOL, reg | 0x100);
 856         reg = wm8960_read(codec, WM8960_RINVOL);
 857         wm8960_write(codec, WM8960_RINVOL, reg | 0x100);
 858         reg = wm8960_read(codec, WM8960_LADC);
 859         wm8960_write(codec, WM8960_LADC, reg | 0x100);
 860         reg = wm8960_read(codec, WM8960_RADC);
 861         wm8960_write(codec, WM8960_RADC, reg | 0x100);
 862         reg = wm8960_read(codec, WM8960_LDAC);
 863         wm8960_write(codec, WM8960_LDAC, reg | 0x100);
 864         reg = wm8960_read(codec, WM8960_RDAC);
 865         wm8960_write(codec, WM8960_RDAC, reg | 0x100);
 866         reg = wm8960_read(codec, WM8960_LOUT1);
 867         wm8960_write(codec, WM8960_LOUT1, reg | 0x100);
 868         reg = wm8960_read(codec, WM8960_ROUT1);
 869         wm8960_write(codec, WM8960_ROUT1, reg | 0x100);
 870         reg = wm8960_read(codec, WM8960_LOUT2);
 871         wm8960_write(codec, WM8960_LOUT2, reg | 0x100);
 872         reg = wm8960_read(codec, WM8960_ROUT2);
 873         wm8960_write(codec, WM8960_ROUT2, reg | 0x100);
 874
 875         wm8960_codec = codec;
 876
 877         ret = snd_soc_register_codec(codec);
 878         if (ret != 0) {
 879                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 880                 return ret;
 881         }
 882
 883         ret = snd_soc_register_dai(&wm8960_dai);
 884         if (ret != 0) {
 885                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 886                 snd_soc_unregister_codec(codec);
 887                 return ret;
 888         }
 889
 890         return 0;
 891 }
 892
 893 static void wm8960_unregister(struct wm8960_priv *wm8960)
 894 {
 895         wm8960_set_bias_level(&wm8960->codec, SND_SOC_BIAS_OFF);
 896         snd_soc_unregister_dai(&wm8960_dai);
 897         snd_soc_unregister_codec(&wm8960->codec);
 898         kfree(wm8960);
 899         wm8960_codec = NULL;
 900 }
 901
 902 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
 903                                       const struct i2c_device_id *id)
 904 {
 905         struct wm8960_priv *wm8960;
 906         struct snd_soc_codec *codec;
 907
 908         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
 909         if (wm8960 == NULL)
 910                 return -ENOMEM;
 911
 912         codec = &wm8960->codec;
 913         codec->hw_write = (hw_write_t)i2c_master_send;
 914
 915         i2c_set_clientdata(i2c, wm8960);
 916         codec->control_data = i2c;
 917
 918         codec->dev = &i2c->dev;
 919
 920         return wm8960_register(wm8960);
 921 }
 922
 923 static __devexit int wm8960_i2c_remove(struct i2c_client *client)
 924 {
 925         struct wm8960_priv *wm8960 = i2c_get_clientdata(client);
 926         wm8960_unregister(wm8960);
 927         return 0;
 928 }
 929
 930 static const struct i2c_device_id wm8960_i2c_id[] = {
 931         { "wm8960", 0 },
 932         { }
 933 };
 934 MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
 935
 936 static struct i2c_driver wm8960_i2c_driver = {
 937         .driver = {
 938                 .name = "WM8960 I2C Codec",
 939                 .owner = THIS_MODULE,
 940         },
 941         .probe =    wm8960_i2c_probe,
 942         .remove =   __devexit_p(wm8960_i2c_remove),
 943         .id_table = wm8960_i2c_id,
 944 };
 945
 946 static int __init wm8960_modinit(void)
 947 {
 948         int ret;
 949
 950         ret = i2c_add_driver(&wm8960_i2c_driver);
 951         if (ret != 0) {
 952                 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
 953                        ret);
 954         }
 955
 956         return ret;
 957 }
 958 module_init(wm8960_modinit);
 959
 960 static void __exit wm8960_exit(void)
 961 {
 962         i2c_del_driver(&wm8960_i2c_driver);
 963 }
 964 module_exit(wm8960_exit);
 965
 966
 967 MODULE_DESCRIPTION("ASoC WM8960 driver");
 968 MODULE_AUTHOR("Liam Girdwood");
 969 MODULE_LICENSE("GPL");