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         enum snd_soc_control_type control_type;
  75         void *control_data;
  76         int (*set_bias_level)(struct snd_soc_codec *,
  77                               enum snd_soc_bias_level level);
  78         struct snd_soc_dapm_widget *lout1;
  79         struct snd_soc_dapm_widget *rout1;
  80         struct snd_soc_dapm_widget *out3;
  81         bool deemph;
  82         int playback_fs;
  83 };
  84
  85 #define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
  86
  87 /* enumerated controls */
  88 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
  89         "Right Inverted", "Stereo Inversion"};
  90 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
  91 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
  92 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
  93 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
  94
  95 static const struct soc_enum wm8960_enum[] = {
  96         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
  97         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
  98         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
  99         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
 100         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 101         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 102 };
 103
 104 static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
 105
 106 static int wm8960_set_deemph(struct snd_soc_codec *codec)
 107 {
 108         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 109         int val, i, best;
 110
 111         /* If we're using deemphasis select the nearest available sample
 112          * rate.
 113          */
 114         if (wm8960->deemph) {
 115                 best = 1;
 116                 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
 117                         if (abs(deemph_settings[i] - wm8960->playback_fs) <
 118                             abs(deemph_settings[best] - wm8960->playback_fs))
 119                                 best = i;
 120                 }
 121
 122                 val = best << 1;
 123         } else {
 124                 val = 0;
 125         }
 126
 127         dev_dbg(codec->dev, "Set deemphasis %d\n", val);
 128
 129         return snd_soc_update_bits(codec, WM8960_DACCTL1,
 130                                    0x6, val);
 131 }
 132
 133 static int wm8960_get_deemph(struct snd_kcontrol *kcontrol,
 134                              struct snd_ctl_elem_value *ucontrol)
 135 {
 136         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 137         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 138
 139         ucontrol->value.enumerated.item[0] = wm8960->deemph;
 140         return 0;
 141 }
 142
 143 static int wm8960_put_deemph(struct snd_kcontrol *kcontrol,
 144                              struct snd_ctl_elem_value *ucontrol)
 145 {
 146         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 147         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 148         int deemph = ucontrol->value.enumerated.item[0];
 149
 150         if (deemph > 1)
 151                 return -EINVAL;
 152
 153         wm8960->deemph = deemph;
 154
 155         return wm8960_set_deemph(codec);
 156 }
 157
 158 static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
 159 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
 160 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
 161 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 162
 163 static const struct snd_kcontrol_new wm8960_snd_controls[] = {
 164 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
 165                  0, 63, 0, adc_tlv),
 166 SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
 167         6, 1, 0),
 168 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
 169         7, 1, 0),
 170
 171 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
 172                  0, 255, 0, dac_tlv),
 173
 174 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
 175                  0, 127, 0, out_tlv),
 176 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
 177         7, 1, 0),
 178
 179 SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
 180                  0, 127, 0, out_tlv),
 181 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
 182         7, 1, 0),
 183 SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
 184 SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
 185
 186 SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
 187 SOC_ENUM("ADC Polarity", wm8960_enum[0]),
 188 SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
 189
 190 SOC_ENUM("DAC Polarity", wm8960_enum[2]),
 191 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
 192                     wm8960_get_deemph, wm8960_put_deemph),
 193
 194 SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[2]),
 195 SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[3]),
 196 SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
 197 SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
 198
 199 SOC_ENUM("ALC Function", wm8960_enum[4]),
 200 SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
 201 SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
 202 SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
 203 SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
 204 SOC_ENUM("ALC Mode", wm8960_enum[5]),
 205 SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
 206 SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
 207
 208 SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
 209 SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
 210
 211 SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
 212         0, 127, 0),
 213
 214 SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
 215                WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
 216 SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
 217                WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
 218 SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
 219                WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
 220 SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
 221                WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
 222 };
 223
 224 static const struct snd_kcontrol_new wm8960_lin_boost[] = {
 225 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
 226 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
 227 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
 228 };
 229
 230 static const struct snd_kcontrol_new wm8960_lin[] = {
 231 SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
 232 };
 233
 234 static const struct snd_kcontrol_new wm8960_rin_boost[] = {
 235 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
 236 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
 237 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
 238 };
 239
 240 static const struct snd_kcontrol_new wm8960_rin[] = {
 241 SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
 242 };
 243
 244 static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
 245 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
 246 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
 247 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
 248 };
 249
 250 static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
 251 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
 252 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
 253 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
 254 };
 255
 256 static const struct snd_kcontrol_new wm8960_mono_out[] = {
 257 SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
 258 SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
 259 };
 260
 261 static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
 262 SND_SOC_DAPM_INPUT("LINPUT1"),
 263 SND_SOC_DAPM_INPUT("RINPUT1"),
 264 SND_SOC_DAPM_INPUT("LINPUT2"),
 265 SND_SOC_DAPM_INPUT("RINPUT2"),
 266 SND_SOC_DAPM_INPUT("LINPUT3"),
 267 SND_SOC_DAPM_INPUT("RINPUT3"),
 268
 269 SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
 270
 271 SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
 272                    wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
 273 SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
 274                    wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
 275
 276 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
 277                    wm8960_lin, ARRAY_SIZE(wm8960_lin)),
 278 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
 279                    wm8960_rin, ARRAY_SIZE(wm8960_rin)),
 280
 281 SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
 282 SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
 283
 284 SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
 285 SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
 286
 287 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
 288         &wm8960_loutput_mixer[0],
 289         ARRAY_SIZE(wm8960_loutput_mixer)),
 290 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
 291         &wm8960_routput_mixer[0],
 292         ARRAY_SIZE(wm8960_routput_mixer)),
 293
 294 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
 295 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
 296
 297 SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
 298 SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
 299
 300 SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
 301 SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
 302
 303 SND_SOC_DAPM_OUTPUT("SPK_LP"),
 304 SND_SOC_DAPM_OUTPUT("SPK_LN"),
 305 SND_SOC_DAPM_OUTPUT("HP_L"),
 306 SND_SOC_DAPM_OUTPUT("HP_R"),
 307 SND_SOC_DAPM_OUTPUT("SPK_RP"),
 308 SND_SOC_DAPM_OUTPUT("SPK_RN"),
 309 SND_SOC_DAPM_OUTPUT("OUT3"),
 310 };
 311
 312 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_out3[] = {
 313 SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
 314         &wm8960_mono_out[0],
 315         ARRAY_SIZE(wm8960_mono_out)),
 316 };
 317
 318 /* Represent OUT3 as a PGA so that it gets turned on with LOUT1/ROUT1 */
 319 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_capless[] = {
 320 SND_SOC_DAPM_PGA("OUT3 VMID", WM8960_POWER2, 1, 0, NULL, 0),
 321 };
 322
 323 static const struct snd_soc_dapm_route audio_paths[] = {
 324         { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
 325         { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
 326         { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
 327
 328         { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
 329         { "Left Input Mixer", NULL, "LINPUT1", },  /* Really Boost Switch */
 330         { "Left Input Mixer", NULL, "LINPUT2" },
 331         { "Left Input Mixer", NULL, "LINPUT3" },
 332
 333         { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
 334         { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
 335         { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
 336
 337         { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
 338         { "Right Input Mixer", NULL, "RINPUT1", },  /* Really Boost Switch */
 339         { "Right Input Mixer", NULL, "RINPUT2" },
 340         { "Right Input Mixer", NULL, "LINPUT3" },
 341
 342         { "Left ADC", NULL, "Left Input Mixer" },
 343         { "Right ADC", NULL, "Right Input Mixer" },
 344
 345         { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
 346         { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
 347         { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
 348
 349         { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
 350         { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
 351         { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
 352
 353         { "LOUT1 PGA", NULL, "Left Output Mixer" },
 354         { "ROUT1 PGA", NULL, "Right Output Mixer" },
 355
 356         { "HP_L", NULL, "LOUT1 PGA" },
 357         { "HP_R", NULL, "ROUT1 PGA" },
 358
 359         { "Left Speaker PGA", NULL, "Left Output Mixer" },
 360         { "Right Speaker PGA", NULL, "Right Output Mixer" },
 361
 362         { "Left Speaker Output", NULL, "Left Speaker PGA" },
 363         { "Right Speaker Output", NULL, "Right Speaker PGA" },
 364
 365         { "SPK_LN", NULL, "Left Speaker Output" },
 366         { "SPK_LP", NULL, "Left Speaker Output" },
 367         { "SPK_RN", NULL, "Right Speaker Output" },
 368         { "SPK_RP", NULL, "Right Speaker Output" },
 369 };
 370
 371 static const struct snd_soc_dapm_route audio_paths_out3[] = {
 372         { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
 373         { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
 374
 375         { "OUT3", NULL, "Mono Output Mixer", }
 376 };
 377
 378 static const struct snd_soc_dapm_route audio_paths_capless[] = {
 379         { "HP_L", NULL, "OUT3 VMID" },
 380         { "HP_R", NULL, "OUT3 VMID" },
 381
 382         { "OUT3 VMID", NULL, "Left Output Mixer" },
 383         { "OUT3 VMID", NULL, "Right Output Mixer" },
 384 };
 385
 386 static int wm8960_add_widgets(struct snd_soc_codec *codec)
 387 {
 388         struct wm8960_data *pdata = codec->dev->platform_data;
 389         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 390         struct snd_soc_dapm_context *dapm = &codec->dapm;
 391         struct snd_soc_dapm_widget *w;
 392
 393         snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets,
 394                                   ARRAY_SIZE(wm8960_dapm_widgets));
 395
 396         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 397
 398         /* In capless mode OUT3 is used to provide VMID for the
 399          * headphone outputs, otherwise it is used as a mono mixer.
 400          */
 401         if (pdata && pdata->capless) {
 402                 snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets_capless,
 403                                           ARRAY_SIZE(wm8960_dapm_widgets_capless));
 404
 405                 snd_soc_dapm_add_routes(dapm, audio_paths_capless,
 406                                         ARRAY_SIZE(audio_paths_capless));
 407         } else {
 408                 snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets_out3,
 409                                           ARRAY_SIZE(wm8960_dapm_widgets_out3));
 410
 411                 snd_soc_dapm_add_routes(dapm, audio_paths_out3,
 412                                         ARRAY_SIZE(audio_paths_out3));
 413         }
 414
 415         /* We need to power up the headphone output stage out of
 416          * sequence for capless mode.  To save scanning the widget
 417          * list each time to find the desired power state do so now
 418          * and save the result.
 419          */
 420         list_for_each_entry(w, &codec->card->widgets, list) {
 421                 if (w->dapm != &codec->dapm)
 422                         continue;
 423                 if (strcmp(w->name, "LOUT1 PGA") == 0)
 424                         wm8960->lout1 = w;
 425                 if (strcmp(w->name, "ROUT1 PGA") == 0)
 426                         wm8960->rout1 = w;
 427                 if (strcmp(w->name, "OUT3 VMID") == 0)
 428                         wm8960->out3 = w;
 429         }
 430
 431         return 0;
 432 }
 433
 434 static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
 435                 unsigned int fmt)
 436 {
 437         struct snd_soc_codec *codec = codec_dai->codec;
 438         u16 iface = 0;
 439
 440         /* set master/slave audio interface */
 441         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 442         case SND_SOC_DAIFMT_CBM_CFM:
 443                 iface |= 0x0040;
 444                 break;
 445         case SND_SOC_DAIFMT_CBS_CFS:
 446                 break;
 447         default:
 448                 return -EINVAL;
 449         }
 450
 451         /* interface format */
 452         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 453         case SND_SOC_DAIFMT_I2S:
 454                 iface |= 0x0002;
 455                 break;
 456         case SND_SOC_DAIFMT_RIGHT_J:
 457                 break;
 458         case SND_SOC_DAIFMT_LEFT_J:
 459                 iface |= 0x0001;
 460                 break;
 461         case SND_SOC_DAIFMT_DSP_A:
 462                 iface |= 0x0003;
 463                 break;
 464         case SND_SOC_DAIFMT_DSP_B:
 465                 iface |= 0x0013;
 466                 break;
 467         default:
 468                 return -EINVAL;
 469         }
 470
 471         /* clock inversion */
 472         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 473         case SND_SOC_DAIFMT_NB_NF:
 474                 break;
 475         case SND_SOC_DAIFMT_IB_IF:
 476                 iface |= 0x0090;
 477                 break;
 478         case SND_SOC_DAIFMT_IB_NF:
 479                 iface |= 0x0080;
 480                 break;
 481         case SND_SOC_DAIFMT_NB_IF:
 482                 iface |= 0x0010;
 483                 break;
 484         default:
 485                 return -EINVAL;
 486         }
 487
 488         /* set iface */
 489         snd_soc_write(codec, WM8960_IFACE1, iface);
 490         return 0;
 491 }
 492
 493 static struct {
 494         int rate;
 495         unsigned int val;
 496 } alc_rates[] = {
 497         { 48000, 0 },
 498         { 44100, 0 },
 499         { 32000, 1 },
 500         { 22050, 2 },
 501         { 24000, 2 },
 502         { 16000, 3 },
 503         { 11250, 4 },
 504         { 12000, 4 },
 505         {  8000, 5 },
 506 };
 507
 508 static int wm8960_hw_params(struct snd_pcm_substream *substream,
 509                             struct snd_pcm_hw_params *params,
 510                             struct snd_soc_dai *dai)
 511 {
 512         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 513         struct snd_soc_codec *codec = rtd->codec;
 514         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 515         u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
 516         int i;
 517
 518         /* bit size */
 519         switch (params_format(params)) {
 520         case SNDRV_PCM_FORMAT_S16_LE:
 521                 break;
 522         case SNDRV_PCM_FORMAT_S20_3LE:
 523                 iface |= 0x0004;
 524                 break;
 525         case SNDRV_PCM_FORMAT_S24_LE:
 526                 iface |= 0x0008;
 527                 break;
 528         }
 529
 530         /* Update filters for the new rate */
 531         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 532                 wm8960->playback_fs = params_rate(params);
 533                 wm8960_set_deemph(codec);
 534         } else {
 535                 for (i = 0; i < ARRAY_SIZE(alc_rates); i++)
 536                         if (alc_rates[i].rate == params_rate(params))
 537                                 snd_soc_update_bits(codec,
 538                                                     WM8960_ADDCTL3, 0x7,
 539                                                     alc_rates[i].val);
 540         }
 541
 542         /* set iface */
 543         snd_soc_write(codec, WM8960_IFACE1, iface);
 544         return 0;
 545 }
 546
 547 static int wm8960_mute(struct snd_soc_dai *dai, int mute)
 548 {
 549         struct snd_soc_codec *codec = dai->codec;
 550         u16 mute_reg = snd_soc_read(codec, WM8960_DACCTL1) & 0xfff7;
 551
 552         if (mute)
 553                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
 554         else
 555                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg);
 556         return 0;
 557 }
 558
 559 static int wm8960_set_bias_level_out3(struct snd_soc_codec *codec,
 560                                       enum snd_soc_bias_level level)
 561 {
 562         u16 reg;
 563
 564         switch (level) {
 565         case SND_SOC_BIAS_ON:
 566                 break;
 567
 568         case SND_SOC_BIAS_PREPARE:
 569                 /* Set VMID to 2x50k */
 570                 reg = snd_soc_read(codec, WM8960_POWER1);
 571                 reg &= ~0x180;
 572                 reg |= 0x80;
 573                 snd_soc_write(codec, WM8960_POWER1, reg);
 574                 break;
 575
 576         case SND_SOC_BIAS_STANDBY:
 577                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 578                         /* Enable anti-pop features */
 579                         snd_soc_write(codec, WM8960_APOP1,
 580                                       WM8960_POBCTRL | WM8960_SOFT_ST |
 581                                       WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 582
 583                         /* Enable & ramp VMID at 2x50k */
 584                         reg = snd_soc_read(codec, WM8960_POWER1);
 585                         reg |= 0x80;
 586                         snd_soc_write(codec, WM8960_POWER1, reg);
 587                         msleep(100);
 588
 589                         /* Enable VREF */
 590                         snd_soc_write(codec, WM8960_POWER1, reg | WM8960_VREF);
 591
 592                         /* Disable anti-pop features */
 593                         snd_soc_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
 594                 }
 595
 596                 /* Set VMID to 2x250k */
 597                 reg = snd_soc_read(codec, WM8960_POWER1);
 598                 reg &= ~0x180;
 599                 reg |= 0x100;
 600                 snd_soc_write(codec, WM8960_POWER1, reg);
 601                 break;
 602
 603         case SND_SOC_BIAS_OFF:
 604                 /* Enable anti-pop features */
 605                 snd_soc_write(codec, WM8960_APOP1,
 606                              WM8960_POBCTRL | WM8960_SOFT_ST |
 607                              WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 608
 609                 /* Disable VMID and VREF, let them discharge */
 610                 snd_soc_write(codec, WM8960_POWER1, 0);
 611                 msleep(600);
 612                 break;
 613         }
 614
 615         codec->dapm.bias_level = level;
 616
 617         return 0;
 618 }
 619
 620 static int wm8960_set_bias_level_capless(struct snd_soc_codec *codec,
 621                                          enum snd_soc_bias_level level)
 622 {
 623         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 624         int reg;
 625
 626         switch (level) {
 627         case SND_SOC_BIAS_ON:
 628                 break;
 629
 630         case SND_SOC_BIAS_PREPARE:
 631                 switch (codec->dapm.bias_level) {
 632                 case SND_SOC_BIAS_STANDBY:
 633                         /* Enable anti pop mode */
 634                         snd_soc_update_bits(codec, WM8960_APOP1,
 635                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 636                                             WM8960_BUFDCOPEN,
 637                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 638                                             WM8960_BUFDCOPEN);
 639
 640                         /* Enable LOUT1, ROUT1 and OUT3 if they're enabled */
 641                         reg = 0;
 642                         if (wm8960->lout1 && wm8960->lout1->power)
 643                                 reg |= WM8960_PWR2_LOUT1;
 644                         if (wm8960->rout1 && wm8960->rout1->power)
 645                                 reg |= WM8960_PWR2_ROUT1;
 646                         if (wm8960->out3 && wm8960->out3->power)
 647                                 reg |= WM8960_PWR2_OUT3;
 648                         snd_soc_update_bits(codec, WM8960_POWER2,
 649                                             WM8960_PWR2_LOUT1 |
 650                                             WM8960_PWR2_ROUT1 |
 651                                             WM8960_PWR2_OUT3, reg);
 652
 653                         /* Enable VMID at 2*50k */
 654                         snd_soc_update_bits(codec, WM8960_POWER1,
 655                                             WM8960_VMID_MASK, 0x80);
 656
 657                         /* Ramp */
 658                         msleep(100);
 659
 660                         /* Enable VREF */
 661                         snd_soc_update_bits(codec, WM8960_POWER1,
 662                                             WM8960_VREF, WM8960_VREF);
 663
 664                         msleep(100);
 665                         break;
 666
 667                 case SND_SOC_BIAS_ON:
 668                         /* Enable anti-pop mode */
 669                         snd_soc_update_bits(codec, WM8960_APOP1,
 670                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 671                                             WM8960_BUFDCOPEN,
 672                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 673                                             WM8960_BUFDCOPEN);
 674
 675                         /* Disable VMID and VREF */
 676                         snd_soc_update_bits(codec, WM8960_POWER1,
 677                                             WM8960_VREF | WM8960_VMID_MASK, 0);
 678                         break;
 679
 680                 default:
 681                         break;
 682                 }
 683                 break;
 684
 685         case SND_SOC_BIAS_STANDBY:
 686                 switch (codec->dapm.bias_level) {
 687                 case SND_SOC_BIAS_PREPARE:
 688                         /* Disable HP discharge */
 689                         snd_soc_update_bits(codec, WM8960_APOP2,
 690                                             WM8960_DISOP | WM8960_DRES_MASK,
 691                                             0);
 692
 693                         /* Disable anti-pop features */
 694                         snd_soc_update_bits(codec, WM8960_APOP1,
 695                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 696                                             WM8960_BUFDCOPEN,
 697                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 698                                             WM8960_BUFDCOPEN);
 699                         break;
 700
 701                 default:
 702                         break;
 703                 }
 704                 break;
 705
 706         case SND_SOC_BIAS_OFF:
 707                 break;
 708         }
 709
 710         codec->dapm.bias_level = level;
 711
 712         return 0;
 713 }
 714
 715 /* PLL divisors */
 716 struct _pll_div {
 717         u32 pre_div:1;
 718         u32 n:4;
 719         u32 k:24;
 720 };
 721
 722 /* The size in bits of the pll divide multiplied by 10
 723  * to allow rounding later */
 724 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 725
 726 static int pll_factors(unsigned int source, unsigned int target,
 727                        struct _pll_div *pll_div)
 728 {
 729         unsigned long long Kpart;
 730         unsigned int K, Ndiv, Nmod;
 731
 732         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
 733
 734         /* Scale up target to PLL operating frequency */
 735         target *= 4;
 736
 737         Ndiv = target / source;
 738         if (Ndiv < 6) {
 739                 source >>= 1;
 740                 pll_div->pre_div = 1;
 741                 Ndiv = target / source;
 742         } else
 743                 pll_div->pre_div = 0;
 744
 745         if ((Ndiv < 6) || (Ndiv > 12)) {
 746                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
 747                 return -EINVAL;
 748         }
 749
 750         pll_div->n = Ndiv;
 751         Nmod = target % source;
 752         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 753
 754         do_div(Kpart, source);
 755
 756         K = Kpart & 0xFFFFFFFF;
 757
 758         /* Check if we need to round */
 759         if ((K % 10) >= 5)
 760                 K += 5;
 761
 762         /* Move down to proper range now rounding is done */
 763         K /= 10;
 764
 765         pll_div->k = K;
 766
 767         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
 768                  pll_div->n, pll_div->k, pll_div->pre_div);
 769
 770         return 0;
 771 }
 772
 773 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 774                 int source, unsigned int freq_in, unsigned int freq_out)
 775 {
 776         struct snd_soc_codec *codec = codec_dai->codec;
 777         u16 reg;
 778         static struct _pll_div pll_div;
 779         int ret;
 780
 781         if (freq_in && freq_out) {
 782                 ret = pll_factors(freq_in, freq_out, &pll_div);
 783                 if (ret != 0)
 784                         return ret;
 785         }
 786
 787         /* Disable the PLL: even if we are changing the frequency the
 788          * PLL needs to be disabled while we do so. */
 789         snd_soc_write(codec, WM8960_CLOCK1,
 790                      snd_soc_read(codec, WM8960_CLOCK1) & ~1);
 791         snd_soc_write(codec, WM8960_POWER2,
 792                      snd_soc_read(codec, WM8960_POWER2) & ~1);
 793
 794         if (!freq_in || !freq_out)
 795                 return 0;
 796
 797         reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
 798         reg |= pll_div.pre_div << 4;
 799         reg |= pll_div.n;
 800
 801         if (pll_div.k) {
 802                 reg |= 0x20;
 803
 804                 snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
 805                 snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
 806                 snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
 807         }
 808         snd_soc_write(codec, WM8960_PLL1, reg);
 809
 810         /* Turn it on */
 811         snd_soc_write(codec, WM8960_POWER2,
 812                      snd_soc_read(codec, WM8960_POWER2) | 1);
 813         msleep(250);
 814         snd_soc_write(codec, WM8960_CLOCK1,
 815                      snd_soc_read(codec, WM8960_CLOCK1) | 1);
 816
 817         return 0;
 818 }
 819
 820 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 821                 int div_id, int div)
 822 {
 823         struct snd_soc_codec *codec = codec_dai->codec;
 824         u16 reg;
 825
 826         switch (div_id) {
 827         case WM8960_SYSCLKDIV:
 828                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
 829                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 830                 break;
 831         case WM8960_DACDIV:
 832                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
 833                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 834                 break;
 835         case WM8960_OPCLKDIV:
 836                 reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
 837                 snd_soc_write(codec, WM8960_PLL1, reg | div);
 838                 break;
 839         case WM8960_DCLKDIV:
 840                 reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
 841                 snd_soc_write(codec, WM8960_CLOCK2, reg | div);
 842                 break;
 843         case WM8960_TOCLKSEL:
 844                 reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
 845                 snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
 846                 break;
 847         default:
 848                 return -EINVAL;
 849         }
 850
 851         return 0;
 852 }
 853
 854 static int wm8960_set_bias_level(struct snd_soc_codec *codec,
 855                                  enum snd_soc_bias_level level)
 856 {
 857         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 858
 859         return wm8960->set_bias_level(codec, level);
 860 }
 861
 862 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
 863
 864 #define WM8960_FORMATS \
 865         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 866         SNDRV_PCM_FMTBIT_S24_LE)
 867
 868 static struct snd_soc_dai_ops wm8960_dai_ops = {
 869         .hw_params = wm8960_hw_params,
 870         .digital_mute = wm8960_mute,
 871         .set_fmt = wm8960_set_dai_fmt,
 872         .set_clkdiv = wm8960_set_dai_clkdiv,
 873         .set_pll = wm8960_set_dai_pll,
 874 };
 875
 876 static struct snd_soc_dai_driver wm8960_dai = {
 877         .name = "wm8960-hifi",
 878         .playback = {
 879                 .stream_name = "Playback",
 880                 .channels_min = 1,
 881                 .channels_max = 2,
 882                 .rates = WM8960_RATES,
 883                 .formats = WM8960_FORMATS,},
 884         .capture = {
 885                 .stream_name = "Capture",
 886                 .channels_min = 1,
 887                 .channels_max = 2,
 888                 .rates = WM8960_RATES,
 889                 .formats = WM8960_FORMATS,},
 890         .ops = &wm8960_dai_ops,
 891         .symmetric_rates = 1,
 892 };
 893
 894 static int wm8960_suspend(struct snd_soc_codec *codec, pm_message_t state)
 895 {
 896         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 897
 898         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 899         return 0;
 900 }
 901
 902 static int wm8960_resume(struct snd_soc_codec *codec)
 903 {
 904         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 905         int i;
 906         u8 data[2];
 907         u16 *cache = codec->reg_cache;
 908
 909         /* Sync reg_cache with the hardware */
 910         for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
 911                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 912                 data[1] = cache[i] & 0x00ff;
 913                 codec->hw_write(codec->control_data, data, 2);
 914         }
 915
 916         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 917         return 0;
 918 }
 919
 920 static int wm8960_probe(struct snd_soc_codec *codec)
 921 {
 922         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 923         struct wm8960_data *pdata = dev_get_platdata(codec->dev);
 924         int ret;
 925         u16 reg;
 926
 927         wm8960->set_bias_level = wm8960_set_bias_level_out3;
 928         codec->control_data = wm8960->control_data;
 929
 930         if (!pdata) {
 931                 dev_warn(codec->dev, "No platform data supplied\n");
 932         } else {
 933                 if (pdata->dres > WM8960_DRES_MAX) {
 934                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
 935                         pdata->dres = 0;
 936                 }
 937
 938                 if (pdata->capless)
 939                         wm8960->set_bias_level = wm8960_set_bias_level_capless;
 940         }
 941
 942         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8960->control_type);
 943         if (ret < 0) {
 944                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 945                 return ret;
 946         }
 947
 948         ret = wm8960_reset(codec);
 949         if (ret < 0) {
 950                 dev_err(codec->dev, "Failed to issue reset\n");
 951                 return ret;
 952         }
 953
 954         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 955
 956         /* Latch the update bits */
 957         reg = snd_soc_read(codec, WM8960_LINVOL);
 958         snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
 959         reg = snd_soc_read(codec, WM8960_RINVOL);
 960         snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
 961         reg = snd_soc_read(codec, WM8960_LADC);
 962         snd_soc_write(codec, WM8960_LADC, reg | 0x100);
 963         reg = snd_soc_read(codec, WM8960_RADC);
 964         snd_soc_write(codec, WM8960_RADC, reg | 0x100);
 965         reg = snd_soc_read(codec, WM8960_LDAC);
 966         snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
 967         reg = snd_soc_read(codec, WM8960_RDAC);
 968         snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
 969         reg = snd_soc_read(codec, WM8960_LOUT1);
 970         snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
 971         reg = snd_soc_read(codec, WM8960_ROUT1);
 972         snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
 973         reg = snd_soc_read(codec, WM8960_LOUT2);
 974         snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
 975         reg = snd_soc_read(codec, WM8960_ROUT2);
 976         snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
 977
 978         snd_soc_add_controls(codec, wm8960_snd_controls,
 979                                      ARRAY_SIZE(wm8960_snd_controls));
 980         wm8960_add_widgets(codec);
 981
 982         return 0;
 983 }
 984
 985 /* power down chip */
 986 static int wm8960_remove(struct snd_soc_codec *codec)
 987 {
 988         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 989
 990         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 991         return 0;
 992 }
 993
 994 static struct snd_soc_codec_driver soc_codec_dev_wm8960 = {
 995         .probe =        wm8960_probe,
 996         .remove =       wm8960_remove,
 997         .suspend =      wm8960_suspend,
 998         .resume =       wm8960_resume,
 999         .set_bias_level = wm8960_set_bias_level,
1000         .reg_cache_size = ARRAY_SIZE(wm8960_reg),
1001         .reg_word_size = sizeof(u16),
1002         .reg_cache_default = wm8960_reg,
1003 };
1004
1005 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1006 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
1007                                       const struct i2c_device_id *id)
1008 {
1009         struct wm8960_priv *wm8960;
1010         int ret;
1011
1012         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
1013         if (wm8960 == NULL)
1014                 return -ENOMEM;
1015
1016         i2c_set_clientdata(i2c, wm8960);
1017         wm8960->control_type = SND_SOC_I2C;
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");