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/soc-dapm.h>
  24 #include <sound/initval.h>
  25 #include <sound/tlv.h>
  26 #include <sound/wm8960.h>
  27
  28 #include "wm8960.h"
  29
  30 #define AUDIO_NAME "wm8960"
  31
  32 /* R25 - Power 1 */
  33 #define WM8960_VMID_MASK 0x180
  34 #define WM8960_VREF      0x40
  35
  36 /* R26 - Power 2 */
  37 #define WM8960_PWR2_LOUT1       0x40
  38 #define WM8960_PWR2_ROUT1       0x20
  39 #define WM8960_PWR2_OUT3        0x02
  40
  41 /* R28 - Anti-pop 1 */
  42 #define WM8960_POBCTRL   0x80
  43 #define WM8960_BUFDCOPEN 0x10
  44 #define WM8960_BUFIOEN   0x08
  45 #define WM8960_SOFT_ST   0x04
  46 #define WM8960_HPSTBY    0x01
  47
  48 /* R29 - Anti-pop 2 */
  49 #define WM8960_DISOP     0x40
  50 #define WM8960_DRES_MASK 0x30
  51
  52 /*
  53  * wm8960 register cache
  54  * We can't read the WM8960 register space when we are
  55  * using 2 wire for device control, so we cache them instead.
  56  */
  57 static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
  58         0x0097, 0x0097, 0x0000, 0x0000,
  59         0x0000, 0x0008, 0x0000, 0x000a,
  60         0x01c0, 0x0000, 0x00ff, 0x00ff,
  61         0x0000, 0x0000, 0x0000, 0x0000,
  62         0x0000, 0x007b, 0x0100, 0x0032,
  63         0x0000, 0x00c3, 0x00c3, 0x01c0,
  64         0x0000, 0x0000, 0x0000, 0x0000,
  65         0x0000, 0x0000, 0x0000, 0x0000,
  66         0x0100, 0x0100, 0x0050, 0x0050,
  67         0x0050, 0x0050, 0x0000, 0x0000,
  68         0x0000, 0x0000, 0x0040, 0x0000,
  69         0x0000, 0x0050, 0x0050, 0x0000,
  70         0x0002, 0x0037, 0x004d, 0x0080,
  71         0x0008, 0x0031, 0x0026, 0x00e9,
  72 };
  73
  74 struct wm8960_priv {
  75         u16 reg_cache[WM8960_CACHEREGNUM];
  76         enum snd_soc_control_type control_type;
  77         void *control_data;
  78         int (*set_bias_level)(struct snd_soc_codec *,
  79                               enum snd_soc_bias_level level);
  80         struct snd_soc_dapm_widget *lout1;
  81         struct snd_soc_dapm_widget *rout1;
  82         struct snd_soc_dapm_widget *out3;
  83         bool deemph;
  84         int playback_fs;
  85 };
  86
  87 #define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
  88
  89 /* enumerated controls */
  90 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
  91         "Right Inverted", "Stereo Inversion"};
  92 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
  93 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
  94 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
  95 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
  96
  97 static const struct soc_enum wm8960_enum[] = {
  98         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
  99         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
 100         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
 101         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
 102         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 103         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 104 };
 105
 106 static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
 107
 108 static int wm8960_set_deemph(struct snd_soc_codec *codec)
 109 {
 110         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 111         int val, i, best;
 112
 113         /* If we're using deemphasis select the nearest available sample
 114          * rate.
 115          */
 116         if (wm8960->deemph) {
 117                 best = 1;
 118                 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
 119                         if (abs(deemph_settings[i] - wm8960->playback_fs) <
 120                             abs(deemph_settings[best] - wm8960->playback_fs))
 121                                 best = i;
 122                 }
 123
 124                 val = best << 1;
 125         } else {
 126                 val = 0;
 127         }
 128
 129         dev_dbg(codec->dev, "Set deemphasis %d\n", val);
 130
 131         return snd_soc_update_bits(codec, WM8960_DACCTL1,
 132                                    0x6, val);
 133 }
 134
 135 static int wm8960_get_deemph(struct snd_kcontrol *kcontrol,
 136                              struct snd_ctl_elem_value *ucontrol)
 137 {
 138         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 139         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 140
 141         return wm8960->deemph;
 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->dapm.widgets, list) {
 422                 if (strcmp(w->name, "LOUT1 PGA") == 0)
 423                         wm8960->lout1 = w;
 424                 if (strcmp(w->name, "ROUT1 PGA") == 0)
 425                         wm8960->rout1 = w;
 426                 if (strcmp(w->name, "OUT3 VMID") == 0)
 427                         wm8960->out3 = w;
 428         }
 429
 430         return 0;
 431 }
 432
 433 static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
 434                 unsigned int fmt)
 435 {
 436         struct snd_soc_codec *codec = codec_dai->codec;
 437         u16 iface = 0;
 438
 439         /* set master/slave audio interface */
 440         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 441         case SND_SOC_DAIFMT_CBM_CFM:
 442                 iface |= 0x0040;
 443                 break;
 444         case SND_SOC_DAIFMT_CBS_CFS:
 445                 break;
 446         default:
 447                 return -EINVAL;
 448         }
 449
 450         /* interface format */
 451         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 452         case SND_SOC_DAIFMT_I2S:
 453                 iface |= 0x0002;
 454                 break;
 455         case SND_SOC_DAIFMT_RIGHT_J:
 456                 break;
 457         case SND_SOC_DAIFMT_LEFT_J:
 458                 iface |= 0x0001;
 459                 break;
 460         case SND_SOC_DAIFMT_DSP_A:
 461                 iface |= 0x0003;
 462                 break;
 463         case SND_SOC_DAIFMT_DSP_B:
 464                 iface |= 0x0013;
 465                 break;
 466         default:
 467                 return -EINVAL;
 468         }
 469
 470         /* clock inversion */
 471         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 472         case SND_SOC_DAIFMT_NB_NF:
 473                 break;
 474         case SND_SOC_DAIFMT_IB_IF:
 475                 iface |= 0x0090;
 476                 break;
 477         case SND_SOC_DAIFMT_IB_NF:
 478                 iface |= 0x0080;
 479                 break;
 480         case SND_SOC_DAIFMT_NB_IF:
 481                 iface |= 0x0010;
 482                 break;
 483         default:
 484                 return -EINVAL;
 485         }
 486
 487         /* set iface */
 488         snd_soc_write(codec, WM8960_IFACE1, iface);
 489         return 0;
 490 }
 491
 492 static struct {
 493         int rate;
 494         unsigned int val;
 495 } alc_rates[] = {
 496         { 48000, 0 },
 497         { 44100, 0 },
 498         { 32000, 1 },
 499         { 22050, 2 },
 500         { 24000, 2 },
 501         { 16000, 3 },
 502         { 11250, 4 },
 503         { 12000, 4 },
 504         {  8000, 5 },
 505 };
 506
 507 static int wm8960_hw_params(struct snd_pcm_substream *substream,
 508                             struct snd_pcm_hw_params *params,
 509                             struct snd_soc_dai *dai)
 510 {
 511         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 512         struct snd_soc_codec *codec = rtd->codec;
 513         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 514         u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
 515         int i;
 516
 517         /* bit size */
 518         switch (params_format(params)) {
 519         case SNDRV_PCM_FORMAT_S16_LE:
 520                 break;
 521         case SNDRV_PCM_FORMAT_S20_3LE:
 522                 iface |= 0x0004;
 523                 break;
 524         case SNDRV_PCM_FORMAT_S24_LE:
 525                 iface |= 0x0008;
 526                 break;
 527         }
 528
 529         /* Update filters for the new rate */
 530         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 531                 wm8960->playback_fs = params_rate(params);
 532                 wm8960_set_deemph(codec);
 533         } else {
 534                 for (i = 0; i < ARRAY_SIZE(alc_rates); i++)
 535                         if (alc_rates[i].rate == params_rate(params))
 536                                 snd_soc_update_bits(codec,
 537                                                     WM8960_ADDCTL3, 0x7,
 538                                                     alc_rates[i].val);
 539         }
 540
 541         /* set iface */
 542         snd_soc_write(codec, WM8960_IFACE1, iface);
 543         return 0;
 544 }
 545
 546 static int wm8960_mute(struct snd_soc_dai *dai, int mute)
 547 {
 548         struct snd_soc_codec *codec = dai->codec;
 549         u16 mute_reg = snd_soc_read(codec, WM8960_DACCTL1) & 0xfff7;
 550
 551         if (mute)
 552                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
 553         else
 554                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg);
 555         return 0;
 556 }
 557
 558 static int wm8960_set_bias_level_out3(struct snd_soc_codec *codec,
 559                                       enum snd_soc_bias_level level)
 560 {
 561         u16 reg;
 562
 563         switch (level) {
 564         case SND_SOC_BIAS_ON:
 565                 break;
 566
 567         case SND_SOC_BIAS_PREPARE:
 568                 /* Set VMID to 2x50k */
 569                 reg = snd_soc_read(codec, WM8960_POWER1);
 570                 reg &= ~0x180;
 571                 reg |= 0x80;
 572                 snd_soc_write(codec, WM8960_POWER1, reg);
 573                 break;
 574
 575         case SND_SOC_BIAS_STANDBY:
 576                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 577                         /* Enable anti-pop features */
 578                         snd_soc_write(codec, WM8960_APOP1,
 579                                       WM8960_POBCTRL | WM8960_SOFT_ST |
 580                                       WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 581
 582                         /* Enable & ramp VMID at 2x50k */
 583                         reg = snd_soc_read(codec, WM8960_POWER1);
 584                         reg |= 0x80;
 585                         snd_soc_write(codec, WM8960_POWER1, reg);
 586                         msleep(100);
 587
 588                         /* Enable VREF */
 589                         snd_soc_write(codec, WM8960_POWER1, reg | WM8960_VREF);
 590
 591                         /* Disable anti-pop features */
 592                         snd_soc_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
 593                 }
 594
 595                 /* Set VMID to 2x250k */
 596                 reg = snd_soc_read(codec, WM8960_POWER1);
 597                 reg &= ~0x180;
 598                 reg |= 0x100;
 599                 snd_soc_write(codec, WM8960_POWER1, reg);
 600                 break;
 601
 602         case SND_SOC_BIAS_OFF:
 603                 /* Enable anti-pop features */
 604                 snd_soc_write(codec, WM8960_APOP1,
 605                              WM8960_POBCTRL | WM8960_SOFT_ST |
 606                              WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 607
 608                 /* Disable VMID and VREF, let them discharge */
 609                 snd_soc_write(codec, WM8960_POWER1, 0);
 610                 msleep(600);
 611                 break;
 612         }
 613
 614         codec->dapm.bias_level = level;
 615
 616         return 0;
 617 }
 618
 619 static int wm8960_set_bias_level_capless(struct snd_soc_codec *codec,
 620                                          enum snd_soc_bias_level level)
 621 {
 622         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 623         int reg;
 624
 625         switch (level) {
 626         case SND_SOC_BIAS_ON:
 627                 break;
 628
 629         case SND_SOC_BIAS_PREPARE:
 630                 switch (codec->dapm.bias_level) {
 631                 case SND_SOC_BIAS_STANDBY:
 632                         /* Enable anti pop mode */
 633                         snd_soc_update_bits(codec, WM8960_APOP1,
 634                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 635                                             WM8960_BUFDCOPEN,
 636                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 637                                             WM8960_BUFDCOPEN);
 638
 639                         /* Enable LOUT1, ROUT1 and OUT3 if they're enabled */
 640                         reg = 0;
 641                         if (wm8960->lout1 && wm8960->lout1->power)
 642                                 reg |= WM8960_PWR2_LOUT1;
 643                         if (wm8960->rout1 && wm8960->rout1->power)
 644                                 reg |= WM8960_PWR2_ROUT1;
 645                         if (wm8960->out3 && wm8960->out3->power)
 646                                 reg |= WM8960_PWR2_OUT3;
 647                         snd_soc_update_bits(codec, WM8960_POWER2,
 648                                             WM8960_PWR2_LOUT1 |
 649                                             WM8960_PWR2_ROUT1 |
 650                                             WM8960_PWR2_OUT3, reg);
 651
 652                         /* Enable VMID at 2*50k */
 653                         snd_soc_update_bits(codec, WM8960_POWER1,
 654                                             WM8960_VMID_MASK, 0x80);
 655
 656                         /* Ramp */
 657                         msleep(100);
 658
 659                         /* Enable VREF */
 660                         snd_soc_update_bits(codec, WM8960_POWER1,
 661                                             WM8960_VREF, WM8960_VREF);
 662
 663                         msleep(100);
 664                         break;
 665
 666                 case SND_SOC_BIAS_ON:
 667                         /* Enable anti-pop mode */
 668                         snd_soc_update_bits(codec, WM8960_APOP1,
 669                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 670                                             WM8960_BUFDCOPEN,
 671                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 672                                             WM8960_BUFDCOPEN);
 673
 674                         /* Disable VMID and VREF */
 675                         snd_soc_update_bits(codec, WM8960_POWER1,
 676                                             WM8960_VREF | WM8960_VMID_MASK, 0);
 677                         break;
 678
 679                 default:
 680                         break;
 681                 }
 682                 break;
 683
 684         case SND_SOC_BIAS_STANDBY:
 685                 switch (codec->dapm.bias_level) {
 686                 case SND_SOC_BIAS_PREPARE:
 687                         /* Disable HP discharge */
 688                         snd_soc_update_bits(codec, WM8960_APOP2,
 689                                             WM8960_DISOP | WM8960_DRES_MASK,
 690                                             0);
 691
 692                         /* Disable anti-pop features */
 693                         snd_soc_update_bits(codec, WM8960_APOP1,
 694                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 695                                             WM8960_BUFDCOPEN,
 696                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 697                                             WM8960_BUFDCOPEN);
 698                         break;
 699
 700                 default:
 701                         break;
 702                 }
 703                 break;
 704
 705         case SND_SOC_BIAS_OFF:
 706                 break;
 707         }
 708
 709         codec->dapm.bias_level = level;
 710
 711         return 0;
 712 }
 713
 714 /* PLL divisors */
 715 struct _pll_div {
 716         u32 pre_div:1;
 717         u32 n:4;
 718         u32 k:24;
 719 };
 720
 721 /* The size in bits of the pll divide multiplied by 10
 722  * to allow rounding later */
 723 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 724
 725 static int pll_factors(unsigned int source, unsigned int target,
 726                        struct _pll_div *pll_div)
 727 {
 728         unsigned long long Kpart;
 729         unsigned int K, Ndiv, Nmod;
 730
 731         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
 732
 733         /* Scale up target to PLL operating frequency */
 734         target *= 4;
 735
 736         Ndiv = target / source;
 737         if (Ndiv < 6) {
 738                 source >>= 1;
 739                 pll_div->pre_div = 1;
 740                 Ndiv = target / source;
 741         } else
 742                 pll_div->pre_div = 0;
 743
 744         if ((Ndiv < 6) || (Ndiv > 12)) {
 745                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
 746                 return -EINVAL;
 747         }
 748
 749         pll_div->n = Ndiv;
 750         Nmod = target % source;
 751         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 752
 753         do_div(Kpart, source);
 754
 755         K = Kpart & 0xFFFFFFFF;
 756
 757         /* Check if we need to round */
 758         if ((K % 10) >= 5)
 759                 K += 5;
 760
 761         /* Move down to proper range now rounding is done */
 762         K /= 10;
 763
 764         pll_div->k = K;
 765
 766         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
 767                  pll_div->n, pll_div->k, pll_div->pre_div);
 768
 769         return 0;
 770 }
 771
 772 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 773                 int source, unsigned int freq_in, unsigned int freq_out)
 774 {
 775         struct snd_soc_codec *codec = codec_dai->codec;
 776         u16 reg;
 777         static struct _pll_div pll_div;
 778         int ret;
 779
 780         if (freq_in && freq_out) {
 781                 ret = pll_factors(freq_in, freq_out, &pll_div);
 782                 if (ret != 0)
 783                         return ret;
 784         }
 785
 786         /* Disable the PLL: even if we are changing the frequency the
 787          * PLL needs to be disabled while we do so. */
 788         snd_soc_write(codec, WM8960_CLOCK1,
 789                      snd_soc_read(codec, WM8960_CLOCK1) & ~1);
 790         snd_soc_write(codec, WM8960_POWER2,
 791                      snd_soc_read(codec, WM8960_POWER2) & ~1);
 792
 793         if (!freq_in || !freq_out)
 794                 return 0;
 795
 796         reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
 797         reg |= pll_div.pre_div << 4;
 798         reg |= pll_div.n;
 799
 800         if (pll_div.k) {
 801                 reg |= 0x20;
 802
 803                 snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
 804                 snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
 805                 snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
 806         }
 807         snd_soc_write(codec, WM8960_PLL1, reg);
 808
 809         /* Turn it on */
 810         snd_soc_write(codec, WM8960_POWER2,
 811                      snd_soc_read(codec, WM8960_POWER2) | 1);
 812         msleep(250);
 813         snd_soc_write(codec, WM8960_CLOCK1,
 814                      snd_soc_read(codec, WM8960_CLOCK1) | 1);
 815
 816         return 0;
 817 }
 818
 819 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 820                 int div_id, int div)
 821 {
 822         struct snd_soc_codec *codec = codec_dai->codec;
 823         u16 reg;
 824
 825         switch (div_id) {
 826         case WM8960_SYSCLKDIV:
 827                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
 828                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 829                 break;
 830         case WM8960_DACDIV:
 831                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
 832                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 833                 break;
 834         case WM8960_OPCLKDIV:
 835                 reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
 836                 snd_soc_write(codec, WM8960_PLL1, reg | div);
 837                 break;
 838         case WM8960_DCLKDIV:
 839                 reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
 840                 snd_soc_write(codec, WM8960_CLOCK2, reg | div);
 841                 break;
 842         case WM8960_TOCLKSEL:
 843                 reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
 844                 snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
 845                 break;
 846         default:
 847                 return -EINVAL;
 848         }
 849
 850         return 0;
 851 }
 852
 853 static int wm8960_set_bias_level(struct snd_soc_codec *codec,
 854                                  enum snd_soc_bias_level level)
 855 {
 856         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 857
 858         return wm8960->set_bias_level(codec, level);
 859 }
 860
 861 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
 862
 863 #define WM8960_FORMATS \
 864         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 865         SNDRV_PCM_FMTBIT_S24_LE)
 866
 867 static struct snd_soc_dai_ops wm8960_dai_ops = {
 868         .hw_params = wm8960_hw_params,
 869         .digital_mute = wm8960_mute,
 870         .set_fmt = wm8960_set_dai_fmt,
 871         .set_clkdiv = wm8960_set_dai_clkdiv,
 872         .set_pll = wm8960_set_dai_pll,
 873 };
 874
 875 static struct snd_soc_dai_driver wm8960_dai = {
 876         .name = "wm8960-hifi",
 877         .playback = {
 878                 .stream_name = "Playback",
 879                 .channels_min = 1,
 880                 .channels_max = 2,
 881                 .rates = WM8960_RATES,
 882                 .formats = WM8960_FORMATS,},
 883         .capture = {
 884                 .stream_name = "Capture",
 885                 .channels_min = 1,
 886                 .channels_max = 2,
 887                 .rates = WM8960_RATES,
 888                 .formats = WM8960_FORMATS,},
 889         .ops = &wm8960_dai_ops,
 890         .symmetric_rates = 1,
 891 };
 892
 893 static int wm8960_suspend(struct snd_soc_codec *codec, pm_message_t state)
 894 {
 895         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 896
 897         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 898         return 0;
 899 }
 900
 901 static int wm8960_resume(struct snd_soc_codec *codec)
 902 {
 903         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 904         int i;
 905         u8 data[2];
 906         u16 *cache = codec->reg_cache;
 907
 908         /* Sync reg_cache with the hardware */
 909         for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
 910                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 911                 data[1] = cache[i] & 0x00ff;
 912                 codec->hw_write(codec->control_data, data, 2);
 913         }
 914
 915         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 916         return 0;
 917 }
 918
 919 static int wm8960_probe(struct snd_soc_codec *codec)
 920 {
 921         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 922         struct wm8960_data *pdata = dev_get_platdata(codec->dev);
 923         int ret;
 924         u16 reg;
 925
 926         wm8960->set_bias_level = wm8960_set_bias_level_out3;
 927         codec->control_data = wm8960->control_data;
 928
 929         if (!pdata) {
 930                 dev_warn(codec->dev, "No platform data supplied\n");
 931         } else {
 932                 if (pdata->dres > WM8960_DRES_MAX) {
 933                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
 934                         pdata->dres = 0;
 935                 }
 936
 937                 if (pdata->capless)
 938                         wm8960->set_bias_level = wm8960_set_bias_level_capless;
 939         }
 940
 941         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8960->control_type);
 942         if (ret < 0) {
 943                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 944                 return ret;
 945         }
 946
 947         ret = wm8960_reset(codec);
 948         if (ret < 0) {
 949                 dev_err(codec->dev, "Failed to issue reset\n");
 950                 return ret;
 951         }
 952
 953         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 954
 955         /* Latch the update bits */
 956         reg = snd_soc_read(codec, WM8960_LINVOL);
 957         snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
 958         reg = snd_soc_read(codec, WM8960_RINVOL);
 959         snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
 960         reg = snd_soc_read(codec, WM8960_LADC);
 961         snd_soc_write(codec, WM8960_LADC, reg | 0x100);
 962         reg = snd_soc_read(codec, WM8960_RADC);
 963         snd_soc_write(codec, WM8960_RADC, reg | 0x100);
 964         reg = snd_soc_read(codec, WM8960_LDAC);
 965         snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
 966         reg = snd_soc_read(codec, WM8960_RDAC);
 967         snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
 968         reg = snd_soc_read(codec, WM8960_LOUT1);
 969         snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
 970         reg = snd_soc_read(codec, WM8960_ROUT1);
 971         snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
 972         reg = snd_soc_read(codec, WM8960_LOUT2);
 973         snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
 974         reg = snd_soc_read(codec, WM8960_ROUT2);
 975         snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
 976
 977         snd_soc_add_controls(codec, wm8960_snd_controls,
 978                                      ARRAY_SIZE(wm8960_snd_controls));
 979         wm8960_add_widgets(codec);
 980
 981         return 0;
 982 }
 983
 984 /* power down chip */
 985 static int wm8960_remove(struct snd_soc_codec *codec)
 986 {
 987         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 988
 989         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 990         return 0;
 991 }
 992
 993 static struct snd_soc_codec_driver soc_codec_dev_wm8960 = {
 994         .probe =        wm8960_probe,
 995         .remove =       wm8960_remove,
 996         .suspend =      wm8960_suspend,
 997         .resume =       wm8960_resume,
 998         .set_bias_level = wm8960_set_bias_level,
 999         .reg_cache_size = ARRAY_SIZE(wm8960_reg),
1000         .reg_word_size = sizeof(u16),
1001         .reg_cache_default = wm8960_reg,
1002 };
1003
1004 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1005 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
1006                                       const struct i2c_device_id *id)
1007 {
1008         struct wm8960_priv *wm8960;
1009         int ret;
1010
1011         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
1012         if (wm8960 == NULL)
1013                 return -ENOMEM;
1014
1015         i2c_set_clientdata(i2c, wm8960);
1016         wm8960->control_data = i2c;
1017
1018         ret = snd_soc_register_codec(&i2c->dev,
1019                         &soc_codec_dev_wm8960, &wm8960_dai, 1);
1020         if (ret < 0)
1021                 kfree(wm8960);
1022         return ret;
1023 }
1024
1025 static __devexit int wm8960_i2c_remove(struct i2c_client *client)
1026 {
1027         snd_soc_unregister_codec(&client->dev);
1028         kfree(i2c_get_clientdata(client));
1029         return 0;
1030 }
1031
1032 static const struct i2c_device_id wm8960_i2c_id[] = {
1033         { "wm8960", 0 },
1034         { }
1035 };
1036 MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
1037
1038 static struct i2c_driver wm8960_i2c_driver = {
1039         .driver = {
1040                 .name = "wm8960-codec",
1041                 .owner = THIS_MODULE,
1042         },
1043         .probe =    wm8960_i2c_probe,
1044         .remove =   __devexit_p(wm8960_i2c_remove),
1045         .id_table = wm8960_i2c_id,
1046 };
1047 #endif
1048
1049 static int __init wm8960_modinit(void)
1050 {
1051         int ret = 0;
1052 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1053         ret = i2c_add_driver(&wm8960_i2c_driver);
1054         if (ret != 0) {
1055                 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
1056                        ret);
1057         }
1058 #endif
1059         return ret;
1060 }
1061 module_init(wm8960_modinit);
1062
1063 static void __exit wm8960_exit(void)
1064 {
1065 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1066         i2c_del_driver(&wm8960_i2c_driver);
1067 #endif
1068 }
1069 module_exit(wm8960_exit);
1070
1071 MODULE_DESCRIPTION("ASoC WM8960 driver");
1072 MODULE_AUTHOR("Liam Girdwood");
1073 MODULE_LICENSE("GPL");