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 <linux/slab.h>
  19 #include <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/pcm_params.h>
  22 #include <sound/soc.h>
  23 #include <sound/initval.h>
  24 #include <sound/tlv.h>
  25 #include <sound/wm8960.h>
  26
  27 #include "wm8960.h"
  28
  29 #define AUDIO_NAME "wm8960"
  30
  31 /* R25 - Power 1 */
  32 #define WM8960_VMID_MASK 0x180
  33 #define WM8960_VREF      0x40
  34
  35 /* R26 - Power 2 */
  36 #define WM8960_PWR2_LOUT1       0x40
  37 #define WM8960_PWR2_ROUT1       0x20
  38 #define WM8960_PWR2_OUT3        0x02
  39
  40 /* R28 - Anti-pop 1 */
  41 #define WM8960_POBCTRL   0x80
  42 #define WM8960_BUFDCOPEN 0x10
  43 #define WM8960_BUFIOEN   0x08
  44 #define WM8960_SOFT_ST   0x04
  45 #define WM8960_HPSTBY    0x01
  46
  47 /* R29 - Anti-pop 2 */
  48 #define WM8960_DISOP     0x40
  49 #define WM8960_DRES_MASK 0x30
  50
  51 /*
  52  * wm8960 register cache
  53  * We can't read the WM8960 register space when we are
  54  * using 2 wire for device control, so we cache them instead.
  55  */
  56 static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
  57         0x0097, 0x0097, 0x0000, 0x0000,
  58         0x0000, 0x0008, 0x0000, 0x000a,
  59         0x01c0, 0x0000, 0x00ff, 0x00ff,
  60         0x0000, 0x0000, 0x0000, 0x0000,
  61         0x0000, 0x007b, 0x0100, 0x0032,
  62         0x0000, 0x00c3, 0x00c3, 0x01c0,
  63         0x0000, 0x0000, 0x0000, 0x0000,
  64         0x0000, 0x0000, 0x0000, 0x0000,
  65         0x0100, 0x0100, 0x0050, 0x0050,
  66         0x0050, 0x0050, 0x0000, 0x0000,
  67         0x0000, 0x0000, 0x0040, 0x0000,
  68         0x0000, 0x0050, 0x0050, 0x0000,
  69         0x0002, 0x0037, 0x004d, 0x0080,
  70         0x0008, 0x0031, 0x0026, 0x00e9,
  71 };
  72
  73 struct wm8960_priv {
  74         u16 reg_cache[WM8960_CACHEREGNUM];
  75         enum snd_soc_control_type control_type;
  76         void *control_data;
  77         int (*set_bias_level)(struct snd_soc_codec *,
  78                               enum snd_soc_bias_level level);
  79         struct snd_soc_dapm_widget *lout1;
  80         struct snd_soc_dapm_widget *rout1;
  81         struct snd_soc_dapm_widget *out3;
  82         bool deemph;
  83         int playback_fs;
  84 };
  85
  86 #define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
  87
  88 /* enumerated controls */
  89 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
  90         "Right Inverted", "Stereo Inversion"};
  91 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
  92 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
  93 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
  94 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
  95
  96 static const struct soc_enum wm8960_enum[] = {
  97         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
  98         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
  99         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
 100         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
 101         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 102         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 103 };
 104
 105 static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
 106
 107 static int wm8960_set_deemph(struct snd_soc_codec *codec)
 108 {
 109         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 110         int val, i, best;
 111
 112         /* If we're using deemphasis select the nearest available sample
 113          * rate.
 114          */
 115         if (wm8960->deemph) {
 116                 best = 1;
 117                 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
 118                         if (abs(deemph_settings[i] - wm8960->playback_fs) <
 119                             abs(deemph_settings[best] - wm8960->playback_fs))
 120                                 best = i;
 121                 }
 122
 123                 val = best << 1;
 124         } else {
 125                 val = 0;
 126         }
 127
 128         dev_dbg(codec->dev, "Set deemphasis %d\n", val);
 129
 130         return snd_soc_update_bits(codec, WM8960_DACCTL1,
 131                                    0x6, val);
 132 }
 133
 134 static int wm8960_get_deemph(struct snd_kcontrol *kcontrol,
 135                              struct snd_ctl_elem_value *ucontrol)
 136 {
 137         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 138         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 139
 140         ucontrol->value.enumerated.item[0] = wm8960->deemph;
 141         return 0;
 142 }
 143
 144 static int wm8960_put_deemph(struct snd_kcontrol *kcontrol,
 145                              struct snd_ctl_elem_value *ucontrol)
 146 {
 147         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 148         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 149         int deemph = ucontrol->value.enumerated.item[0];
 150
 151         if (deemph > 1)
 152                 return -EINVAL;
 153
 154         wm8960->deemph = deemph;
 155
 156         return wm8960_set_deemph(codec);
 157 }
 158
 159 static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
 160 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
 161 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
 162 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 163
 164 static const struct snd_kcontrol_new wm8960_snd_controls[] = {
 165 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
 166                  0, 63, 0, adc_tlv),
 167 SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
 168         6, 1, 0),
 169 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
 170         7, 1, 0),
 171
 172 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
 173                  0, 255, 0, dac_tlv),
 174
 175 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
 176                  0, 127, 0, out_tlv),
 177 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
 178         7, 1, 0),
 179
 180 SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
 181                  0, 127, 0, out_tlv),
 182 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
 183         7, 1, 0),
 184 SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
 185 SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
 186
 187 SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
 188 SOC_ENUM("ADC Polarity", wm8960_enum[0]),
 189 SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
 190
 191 SOC_ENUM("DAC Polarity", wm8960_enum[2]),
 192 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
 193                     wm8960_get_deemph, wm8960_put_deemph),
 194
 195 SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[2]),
 196 SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[3]),
 197 SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
 198 SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
 199
 200 SOC_ENUM("ALC Function", wm8960_enum[4]),
 201 SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
 202 SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
 203 SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
 204 SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
 205 SOC_ENUM("ALC Mode", wm8960_enum[5]),
 206 SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
 207 SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
 208
 209 SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
 210 SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
 211
 212 SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
 213         0, 127, 0),
 214
 215 SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
 216                WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
 217 SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
 218                WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
 219 SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
 220                WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
 221 SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
 222                WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
 223 };
 224
 225 static const struct snd_kcontrol_new wm8960_lin_boost[] = {
 226 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
 227 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
 228 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
 229 };
 230
 231 static const struct snd_kcontrol_new wm8960_lin[] = {
 232 SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
 233 };
 234
 235 static const struct snd_kcontrol_new wm8960_rin_boost[] = {
 236 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
 237 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
 238 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
 239 };
 240
 241 static const struct snd_kcontrol_new wm8960_rin[] = {
 242 SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
 243 };
 244
 245 static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
 246 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
 247 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
 248 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
 249 };
 250
 251 static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
 252 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
 253 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
 254 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
 255 };
 256
 257 static const struct snd_kcontrol_new wm8960_mono_out[] = {
 258 SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
 259 SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
 260 };
 261
 262 static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
 263 SND_SOC_DAPM_INPUT("LINPUT1"),
 264 SND_SOC_DAPM_INPUT("RINPUT1"),
 265 SND_SOC_DAPM_INPUT("LINPUT2"),
 266 SND_SOC_DAPM_INPUT("RINPUT2"),
 267 SND_SOC_DAPM_INPUT("LINPUT3"),
 268 SND_SOC_DAPM_INPUT("RINPUT3"),
 269
 270 SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
 271
 272 SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
 273                    wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
 274 SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
 275                    wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
 276
 277 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
 278                    wm8960_lin, ARRAY_SIZE(wm8960_lin)),
 279 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
 280                    wm8960_rin, ARRAY_SIZE(wm8960_rin)),
 281
 282 SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
 283 SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
 284
 285 SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
 286 SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
 287
 288 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
 289         &wm8960_loutput_mixer[0],
 290         ARRAY_SIZE(wm8960_loutput_mixer)),
 291 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
 292         &wm8960_routput_mixer[0],
 293         ARRAY_SIZE(wm8960_routput_mixer)),
 294
 295 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
 296 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
 297
 298 SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
 299 SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
 300
 301 SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
 302 SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
 303
 304 SND_SOC_DAPM_OUTPUT("SPK_LP"),
 305 SND_SOC_DAPM_OUTPUT("SPK_LN"),
 306 SND_SOC_DAPM_OUTPUT("HP_L"),
 307 SND_SOC_DAPM_OUTPUT("HP_R"),
 308 SND_SOC_DAPM_OUTPUT("SPK_RP"),
 309 SND_SOC_DAPM_OUTPUT("SPK_RN"),
 310 SND_SOC_DAPM_OUTPUT("OUT3"),
 311 };
 312
 313 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_out3[] = {
 314 SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
 315         &wm8960_mono_out[0],
 316         ARRAY_SIZE(wm8960_mono_out)),
 317 };
 318
 319 /* Represent OUT3 as a PGA so that it gets turned on with LOUT1/ROUT1 */
 320 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_capless[] = {
 321 SND_SOC_DAPM_PGA("OUT3 VMID", WM8960_POWER2, 1, 0, NULL, 0),
 322 };
 323
 324 static const struct snd_soc_dapm_route audio_paths[] = {
 325         { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
 326         { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
 327         { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
 328
 329         { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
 330         { "Left Input Mixer", NULL, "LINPUT1", },  /* Really Boost Switch */
 331         { "Left Input Mixer", NULL, "LINPUT2" },
 332         { "Left Input Mixer", NULL, "LINPUT3" },
 333
 334         { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
 335         { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
 336         { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
 337
 338         { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
 339         { "Right Input Mixer", NULL, "RINPUT1", },  /* Really Boost Switch */
 340         { "Right Input Mixer", NULL, "RINPUT2" },
 341         { "Right Input Mixer", NULL, "LINPUT3" },
 342
 343         { "Left ADC", NULL, "Left Input Mixer" },
 344         { "Right ADC", NULL, "Right Input Mixer" },
 345
 346         { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
 347         { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
 348         { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
 349
 350         { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
 351         { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
 352         { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
 353
 354         { "LOUT1 PGA", NULL, "Left Output Mixer" },
 355         { "ROUT1 PGA", NULL, "Right Output Mixer" },
 356
 357         { "HP_L", NULL, "LOUT1 PGA" },
 358         { "HP_R", NULL, "ROUT1 PGA" },
 359
 360         { "Left Speaker PGA", NULL, "Left Output Mixer" },
 361         { "Right Speaker PGA", NULL, "Right Output Mixer" },
 362
 363         { "Left Speaker Output", NULL, "Left Speaker PGA" },
 364         { "Right Speaker Output", NULL, "Right Speaker PGA" },
 365
 366         { "SPK_LN", NULL, "Left Speaker Output" },
 367         { "SPK_LP", NULL, "Left Speaker Output" },
 368         { "SPK_RN", NULL, "Right Speaker Output" },
 369         { "SPK_RP", NULL, "Right Speaker Output" },
 370 };
 371
 372 static const struct snd_soc_dapm_route audio_paths_out3[] = {
 373         { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
 374         { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
 375
 376         { "OUT3", NULL, "Mono Output Mixer", }
 377 };
 378
 379 static const struct snd_soc_dapm_route audio_paths_capless[] = {
 380         { "HP_L", NULL, "OUT3 VMID" },
 381         { "HP_R", NULL, "OUT3 VMID" },
 382
 383         { "OUT3 VMID", NULL, "Left Output Mixer" },
 384         { "OUT3 VMID", NULL, "Right Output Mixer" },
 385 };
 386
 387 static int wm8960_add_widgets(struct snd_soc_codec *codec)
 388 {
 389         struct wm8960_data *pdata = codec->dev->platform_data;
 390         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 391         struct snd_soc_dapm_context *dapm = &codec->dapm;
 392         struct snd_soc_dapm_widget *w;
 393
 394         snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets,
 395                                   ARRAY_SIZE(wm8960_dapm_widgets));
 396
 397         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 398
 399         /* In capless mode OUT3 is used to provide VMID for the
 400          * headphone outputs, otherwise it is used as a mono mixer.
 401          */
 402         if (pdata && pdata->capless) {
 403                 snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets_capless,
 404                                           ARRAY_SIZE(wm8960_dapm_widgets_capless));
 405
 406                 snd_soc_dapm_add_routes(dapm, audio_paths_capless,
 407                                         ARRAY_SIZE(audio_paths_capless));
 408         } else {
 409                 snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets_out3,
 410                                           ARRAY_SIZE(wm8960_dapm_widgets_out3));
 411
 412                 snd_soc_dapm_add_routes(dapm, audio_paths_out3,
 413                                         ARRAY_SIZE(audio_paths_out3));
 414         }
 415
 416         /* We need to power up the headphone output stage out of
 417          * sequence for capless mode.  To save scanning the widget
 418          * list each time to find the desired power state do so now
 419          * and save the result.
 420          */
 421         list_for_each_entry(w, &codec->card->widgets, list) {
 422                 if (w->dapm != &codec->dapm)
 423                         continue;
 424                 if (strcmp(w->name, "LOUT1 PGA") == 0)
 425                         wm8960->lout1 = w;
 426                 if (strcmp(w->name, "ROUT1 PGA") == 0)
 427                         wm8960->rout1 = w;
 428                 if (strcmp(w->name, "OUT3 VMID") == 0)
 429                         wm8960->out3 = w;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
 436                 unsigned int fmt)
 437 {
 438         struct snd_soc_codec *codec = codec_dai->codec;
 439         u16 iface = 0;
 440
 441         /* set master/slave audio interface */
 442         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 443         case SND_SOC_DAIFMT_CBM_CFM:
 444                 iface |= 0x0040;
 445                 break;
 446         case SND_SOC_DAIFMT_CBS_CFS:
 447                 break;
 448         default:
 449                 return -EINVAL;
 450         }
 451
 452         /* interface format */
 453         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 454         case SND_SOC_DAIFMT_I2S:
 455                 iface |= 0x0002;
 456                 break;
 457         case SND_SOC_DAIFMT_RIGHT_J:
 458                 break;
 459         case SND_SOC_DAIFMT_LEFT_J:
 460                 iface |= 0x0001;
 461                 break;
 462         case SND_SOC_DAIFMT_DSP_A:
 463                 iface |= 0x0003;
 464                 break;
 465         case SND_SOC_DAIFMT_DSP_B:
 466                 iface |= 0x0013;
 467                 break;
 468         default:
 469                 return -EINVAL;
 470         }
 471
 472         /* clock inversion */
 473         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 474         case SND_SOC_DAIFMT_NB_NF:
 475                 break;
 476         case SND_SOC_DAIFMT_IB_IF:
 477                 iface |= 0x0090;
 478                 break;
 479         case SND_SOC_DAIFMT_IB_NF:
 480                 iface |= 0x0080;
 481                 break;
 482         case SND_SOC_DAIFMT_NB_IF:
 483                 iface |= 0x0010;
 484                 break;
 485         default:
 486                 return -EINVAL;
 487         }
 488
 489         /* set iface */
 490         snd_soc_write(codec, WM8960_IFACE1, iface);
 491         return 0;
 492 }
 493
 494 static struct {
 495         int rate;
 496         unsigned int val;
 497 } alc_rates[] = {
 498         { 48000, 0 },
 499         { 44100, 0 },
 500         { 32000, 1 },
 501         { 22050, 2 },
 502         { 24000, 2 },
 503         { 16000, 3 },
 504         { 11250, 4 },
 505         { 12000, 4 },
 506         {  8000, 5 },
 507 };
 508
 509 static int wm8960_hw_params(struct snd_pcm_substream *substream,
 510                             struct snd_pcm_hw_params *params,
 511                             struct snd_soc_dai *dai)
 512 {
 513         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 514         struct snd_soc_codec *codec = rtd->codec;
 515         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 516         u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
 517         int i;
 518
 519         /* bit size */
 520         switch (params_format(params)) {
 521         case SNDRV_PCM_FORMAT_S16_LE:
 522                 break;
 523         case SNDRV_PCM_FORMAT_S20_3LE:
 524                 iface |= 0x0004;
 525                 break;
 526         case SNDRV_PCM_FORMAT_S24_LE:
 527                 iface |= 0x0008;
 528                 break;
 529         }
 530
 531         /* Update filters for the new rate */
 532         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 533                 wm8960->playback_fs = params_rate(params);
 534                 wm8960_set_deemph(codec);
 535         } else {
 536                 for (i = 0; i < ARRAY_SIZE(alc_rates); i++)
 537                         if (alc_rates[i].rate == params_rate(params))
 538                                 snd_soc_update_bits(codec,
 539                                                     WM8960_ADDCTL3, 0x7,
 540                                                     alc_rates[i].val);
 541         }
 542
 543         /* set iface */
 544         snd_soc_write(codec, WM8960_IFACE1, iface);
 545         return 0;
 546 }
 547
 548 static int wm8960_mute(struct snd_soc_dai *dai, int mute)
 549 {
 550         struct snd_soc_codec *codec = dai->codec;
 551         u16 mute_reg = snd_soc_read(codec, WM8960_DACCTL1) & 0xfff7;
 552
 553         if (mute)
 554                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
 555         else
 556                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg);
 557         return 0;
 558 }
 559
 560 static int wm8960_set_bias_level_out3(struct snd_soc_codec *codec,
 561                                       enum snd_soc_bias_level level)
 562 {
 563         u16 reg;
 564
 565         switch (level) {
 566         case SND_SOC_BIAS_ON:
 567                 break;
 568
 569         case SND_SOC_BIAS_PREPARE:
 570                 /* Set VMID to 2x50k */
 571                 reg = snd_soc_read(codec, WM8960_POWER1);
 572                 reg &= ~0x180;
 573                 reg |= 0x80;
 574                 snd_soc_write(codec, WM8960_POWER1, reg);
 575                 break;
 576
 577         case SND_SOC_BIAS_STANDBY:
 578                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 579                         /* Enable anti-pop features */
 580                         snd_soc_write(codec, WM8960_APOP1,
 581                                       WM8960_POBCTRL | WM8960_SOFT_ST |
 582                                       WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 583
 584                         /* Enable & ramp VMID at 2x50k */
 585                         reg = snd_soc_read(codec, WM8960_POWER1);
 586                         reg |= 0x80;
 587                         snd_soc_write(codec, WM8960_POWER1, reg);
 588                         msleep(100);
 589
 590                         /* Enable VREF */
 591                         snd_soc_write(codec, WM8960_POWER1, reg | WM8960_VREF);
 592
 593                         /* Disable anti-pop features */
 594                         snd_soc_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
 595                 }
 596
 597                 /* Set VMID to 2x250k */
 598                 reg = snd_soc_read(codec, WM8960_POWER1);
 599                 reg &= ~0x180;
 600                 reg |= 0x100;
 601                 snd_soc_write(codec, WM8960_POWER1, reg);
 602                 break;
 603
 604         case SND_SOC_BIAS_OFF:
 605                 /* Enable anti-pop features */
 606                 snd_soc_write(codec, WM8960_APOP1,
 607                              WM8960_POBCTRL | WM8960_SOFT_ST |
 608                              WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 609
 610                 /* Disable VMID and VREF, let them discharge */
 611                 snd_soc_write(codec, WM8960_POWER1, 0);
 612                 msleep(600);
 613                 break;
 614         }
 615
 616         codec->dapm.bias_level = level;
 617
 618         return 0;
 619 }
 620
 621 static int wm8960_set_bias_level_capless(struct snd_soc_codec *codec,
 622                                          enum snd_soc_bias_level level)
 623 {
 624         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 625         int reg;
 626
 627         switch (level) {
 628         case SND_SOC_BIAS_ON:
 629                 break;
 630
 631         case SND_SOC_BIAS_PREPARE:
 632                 switch (codec->dapm.bias_level) {
 633                 case SND_SOC_BIAS_STANDBY:
 634                         /* Enable anti pop mode */
 635                         snd_soc_update_bits(codec, WM8960_APOP1,
 636                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 637                                             WM8960_BUFDCOPEN,
 638                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 639                                             WM8960_BUFDCOPEN);
 640
 641                         /* Enable LOUT1, ROUT1 and OUT3 if they're enabled */
 642                         reg = 0;
 643                         if (wm8960->lout1 && wm8960->lout1->power)
 644                                 reg |= WM8960_PWR2_LOUT1;
 645                         if (wm8960->rout1 && wm8960->rout1->power)
 646                                 reg |= WM8960_PWR2_ROUT1;
 647                         if (wm8960->out3 && wm8960->out3->power)
 648                                 reg |= WM8960_PWR2_OUT3;
 649                         snd_soc_update_bits(codec, WM8960_POWER2,
 650                                             WM8960_PWR2_LOUT1 |
 651                                             WM8960_PWR2_ROUT1 |
 652                                             WM8960_PWR2_OUT3, reg);
 653
 654                         /* Enable VMID at 2*50k */
 655                         snd_soc_update_bits(codec, WM8960_POWER1,
 656                                             WM8960_VMID_MASK, 0x80);
 657
 658                         /* Ramp */
 659                         msleep(100);
 660
 661                         /* Enable VREF */
 662                         snd_soc_update_bits(codec, WM8960_POWER1,
 663                                             WM8960_VREF, WM8960_VREF);
 664
 665                         msleep(100);
 666                         break;
 667
 668                 case SND_SOC_BIAS_ON:
 669                         /* Enable anti-pop mode */
 670                         snd_soc_update_bits(codec, WM8960_APOP1,
 671                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 672                                             WM8960_BUFDCOPEN,
 673                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 674                                             WM8960_BUFDCOPEN);
 675
 676                         /* Disable VMID and VREF */
 677                         snd_soc_update_bits(codec, WM8960_POWER1,
 678                                             WM8960_VREF | WM8960_VMID_MASK, 0);
 679                         break;
 680
 681                 default:
 682                         break;
 683                 }
 684                 break;
 685
 686         case SND_SOC_BIAS_STANDBY:
 687                 switch (codec->dapm.bias_level) {
 688                 case SND_SOC_BIAS_PREPARE:
 689                         /* Disable HP discharge */
 690                         snd_soc_update_bits(codec, WM8960_APOP2,
 691                                             WM8960_DISOP | WM8960_DRES_MASK,
 692                                             0);
 693
 694                         /* Disable anti-pop features */
 695                         snd_soc_update_bits(codec, WM8960_APOP1,
 696                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 697                                             WM8960_BUFDCOPEN,
 698                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 699                                             WM8960_BUFDCOPEN);
 700                         break;
 701
 702                 default:
 703                         break;
 704                 }
 705                 break;
 706
 707         case SND_SOC_BIAS_OFF:
 708                 break;
 709         }
 710
 711         codec->dapm.bias_level = level;
 712
 713         return 0;
 714 }
 715
 716 /* PLL divisors */
 717 struct _pll_div {
 718         u32 pre_div:1;
 719         u32 n:4;
 720         u32 k:24;
 721 };
 722
 723 /* The size in bits of the pll divide multiplied by 10
 724  * to allow rounding later */
 725 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 726
 727 static int pll_factors(unsigned int source, unsigned int target,
 728                        struct _pll_div *pll_div)
 729 {
 730         unsigned long long Kpart;
 731         unsigned int K, Ndiv, Nmod;
 732
 733         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
 734
 735         /* Scale up target to PLL operating frequency */
 736         target *= 4;
 737
 738         Ndiv = target / source;
 739         if (Ndiv < 6) {
 740                 source >>= 1;
 741                 pll_div->pre_div = 1;
 742                 Ndiv = target / source;
 743         } else
 744                 pll_div->pre_div = 0;
 745
 746         if ((Ndiv < 6) || (Ndiv > 12)) {
 747                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
 748                 return -EINVAL;
 749         }
 750
 751         pll_div->n = Ndiv;
 752         Nmod = target % source;
 753         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 754
 755         do_div(Kpart, source);
 756
 757         K = Kpart & 0xFFFFFFFF;
 758
 759         /* Check if we need to round */
 760         if ((K % 10) >= 5)
 761                 K += 5;
 762
 763         /* Move down to proper range now rounding is done */
 764         K /= 10;
 765
 766         pll_div->k = K;
 767
 768         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
 769                  pll_div->n, pll_div->k, pll_div->pre_div);
 770
 771         return 0;
 772 }
 773
 774 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 775                 int source, unsigned int freq_in, unsigned int freq_out)
 776 {
 777         struct snd_soc_codec *codec = codec_dai->codec;
 778         u16 reg;
 779         static struct _pll_div pll_div;
 780         int ret;
 781
 782         if (freq_in && freq_out) {
 783                 ret = pll_factors(freq_in, freq_out, &pll_div);
 784                 if (ret != 0)
 785                         return ret;
 786         }
 787
 788         /* Disable the PLL: even if we are changing the frequency the
 789          * PLL needs to be disabled while we do so. */
 790         snd_soc_write(codec, WM8960_CLOCK1,
 791                      snd_soc_read(codec, WM8960_CLOCK1) & ~1);
 792         snd_soc_write(codec, WM8960_POWER2,
 793                      snd_soc_read(codec, WM8960_POWER2) & ~1);
 794
 795         if (!freq_in || !freq_out)
 796                 return 0;
 797
 798         reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
 799         reg |= pll_div.pre_div << 4;
 800         reg |= pll_div.n;
 801
 802         if (pll_div.k) {
 803                 reg |= 0x20;
 804
 805                 snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
 806                 snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
 807                 snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
 808         }
 809         snd_soc_write(codec, WM8960_PLL1, reg);
 810
 811         /* Turn it on */
 812         snd_soc_write(codec, WM8960_POWER2,
 813                      snd_soc_read(codec, WM8960_POWER2) | 1);
 814         msleep(250);
 815         snd_soc_write(codec, WM8960_CLOCK1,
 816                      snd_soc_read(codec, WM8960_CLOCK1) | 1);
 817
 818         return 0;
 819 }
 820
 821 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 822                 int div_id, int div)
 823 {
 824         struct snd_soc_codec *codec = codec_dai->codec;
 825         u16 reg;
 826
 827         switch (div_id) {
 828         case WM8960_SYSCLKDIV:
 829                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
 830                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 831                 break;
 832         case WM8960_DACDIV:
 833                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
 834                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 835                 break;
 836         case WM8960_OPCLKDIV:
 837                 reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
 838                 snd_soc_write(codec, WM8960_PLL1, reg | div);
 839                 break;
 840         case WM8960_DCLKDIV:
 841                 reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
 842                 snd_soc_write(codec, WM8960_CLOCK2, reg | div);
 843                 break;
 844         case WM8960_TOCLKSEL:
 845                 reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
 846                 snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
 847                 break;
 848         default:
 849                 return -EINVAL;
 850         }
 851
 852         return 0;
 853 }
 854
 855 static int wm8960_set_bias_level(struct snd_soc_codec *codec,
 856                                  enum snd_soc_bias_level level)
 857 {
 858         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 859
 860         return wm8960->set_bias_level(codec, level);
 861 }
 862
 863 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
 864
 865 #define WM8960_FORMATS \
 866         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 867         SNDRV_PCM_FMTBIT_S24_LE)
 868
 869 static struct snd_soc_dai_ops wm8960_dai_ops = {
 870         .hw_params = wm8960_hw_params,
 871         .digital_mute = wm8960_mute,
 872         .set_fmt = wm8960_set_dai_fmt,
 873         .set_clkdiv = wm8960_set_dai_clkdiv,
 874         .set_pll = wm8960_set_dai_pll,
 875 };
 876
 877 static struct snd_soc_dai_driver wm8960_dai = {
 878         .name = "wm8960-hifi",
 879         .playback = {
 880                 .stream_name = "Playback",
 881                 .channels_min = 1,
 882                 .channels_max = 2,
 883                 .rates = WM8960_RATES,
 884                 .formats = WM8960_FORMATS,},
 885         .capture = {
 886                 .stream_name = "Capture",
 887                 .channels_min = 1,
 888                 .channels_max = 2,
 889                 .rates = WM8960_RATES,
 890                 .formats = WM8960_FORMATS,},
 891         .ops = &wm8960_dai_ops,
 892         .symmetric_rates = 1,
 893 };
 894
 895 static int wm8960_suspend(struct snd_soc_codec *codec, pm_message_t state)
 896 {
 897         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 898
 899         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 900         return 0;
 901 }
 902
 903 static int wm8960_resume(struct snd_soc_codec *codec)
 904 {
 905         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 906         int i;
 907         u8 data[2];
 908         u16 *cache = codec->reg_cache;
 909
 910         /* Sync reg_cache with the hardware */
 911         for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
 912                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 913                 data[1] = cache[i] & 0x00ff;
 914                 codec->hw_write(codec->control_data, data, 2);
 915         }
 916
 917         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 918         return 0;
 919 }
 920
 921 static int wm8960_probe(struct snd_soc_codec *codec)
 922 {
 923         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 924         struct wm8960_data *pdata = dev_get_platdata(codec->dev);
 925         int ret;
 926         u16 reg;
 927
 928         wm8960->set_bias_level = wm8960_set_bias_level_out3;
 929         codec->control_data = wm8960->control_data;
 930
 931         if (!pdata) {
 932                 dev_warn(codec->dev, "No platform data supplied\n");
 933         } else {
 934                 if (pdata->dres > WM8960_DRES_MAX) {
 935                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
 936                         pdata->dres = 0;
 937                 }
 938
 939                 if (pdata->capless)
 940                         wm8960->set_bias_level = wm8960_set_bias_level_capless;
 941         }
 942
 943         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8960->control_type);
 944         if (ret < 0) {
 945                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 946                 return ret;
 947         }
 948
 949         ret = wm8960_reset(codec);
 950         if (ret < 0) {
 951                 dev_err(codec->dev, "Failed to issue reset\n");
 952                 return ret;
 953         }
 954
 955         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 956
 957         /* Latch the update bits */
 958         reg = snd_soc_read(codec, WM8960_LINVOL);
 959         snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
 960         reg = snd_soc_read(codec, WM8960_RINVOL);
 961         snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
 962         reg = snd_soc_read(codec, WM8960_LADC);
 963         snd_soc_write(codec, WM8960_LADC, reg | 0x100);
 964         reg = snd_soc_read(codec, WM8960_RADC);
 965         snd_soc_write(codec, WM8960_RADC, reg | 0x100);
 966         reg = snd_soc_read(codec, WM8960_LDAC);
 967         snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
 968         reg = snd_soc_read(codec, WM8960_RDAC);
 969         snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
 970         reg = snd_soc_read(codec, WM8960_LOUT1);
 971         snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
 972         reg = snd_soc_read(codec, WM8960_ROUT1);
 973         snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
 974         reg = snd_soc_read(codec, WM8960_LOUT2);
 975         snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
 976         reg = snd_soc_read(codec, WM8960_ROUT2);
 977         snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
 978
 979         snd_soc_add_controls(codec, wm8960_snd_controls,
 980                                      ARRAY_SIZE(wm8960_snd_controls));
 981         wm8960_add_widgets(codec);
 982
 983         return 0;
 984 }
 985
 986 /* power down chip */
 987 static int wm8960_remove(struct snd_soc_codec *codec)
 988 {
 989         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 990
 991         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 992         return 0;
 993 }
 994
 995 static struct snd_soc_codec_driver soc_codec_dev_wm8960 = {
 996         .probe =        wm8960_probe,
 997         .remove =       wm8960_remove,
 998         .suspend =      wm8960_suspend,
 999         .resume =       wm8960_resume,
1000         .set_bias_level = wm8960_set_bias_level,
1001         .reg_cache_size = ARRAY_SIZE(wm8960_reg),
1002         .reg_word_size = sizeof(u16),
1003         .reg_cache_default = wm8960_reg,
1004 };
1005
1006 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1007 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
1008                                       const struct i2c_device_id *id)
1009 {
1010         struct wm8960_priv *wm8960;
1011         int ret;
1012
1013         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
1014         if (wm8960 == NULL)
1015                 return -ENOMEM;
1016
1017         i2c_set_clientdata(i2c, wm8960);
1018         wm8960->control_data = i2c;
1019
1020         ret = snd_soc_register_codec(&i2c->dev,
1021                         &soc_codec_dev_wm8960, &wm8960_dai, 1);
1022         if (ret < 0)
1023                 kfree(wm8960);
1024         return ret;
1025 }
1026
1027 static __devexit int wm8960_i2c_remove(struct i2c_client *client)
1028 {
1029         snd_soc_unregister_codec(&client->dev);
1030         kfree(i2c_get_clientdata(client));
1031         return 0;
1032 }
1033
1034 static const struct i2c_device_id wm8960_i2c_id[] = {
1035         { "wm8960", 0 },
1036         { }
1037 };
1038 MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
1039
1040 static struct i2c_driver wm8960_i2c_driver = {
1041         .driver = {
1042                 .name = "wm8960-codec",
1043                 .owner = THIS_MODULE,
1044         },
1045         .probe =    wm8960_i2c_probe,
1046         .remove =   __devexit_p(wm8960_i2c_remove),
1047         .id_table = wm8960_i2c_id,
1048 };
1049 #endif
1050
1051 static int __init wm8960_modinit(void)
1052 {
1053         int ret = 0;
1054 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1055         ret = i2c_add_driver(&wm8960_i2c_driver);
1056         if (ret != 0) {
1057                 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
1058                        ret);
1059         }
1060 #endif
1061         return ret;
1062 }
1063 module_init(wm8960_modinit);
1064
1065 static void __exit wm8960_exit(void)
1066 {
1067 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1068         i2c_del_driver(&wm8960_i2c_driver);
1069 #endif
1070 }
1071 module_exit(wm8960_exit);
1072
1073 MODULE_DESCRIPTION("ASoC WM8960 driver");
1074 MODULE_AUTHOR("Liam Girdwood");
1075 MODULE_LICENSE("GPL");