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         int (*set_bias_level)(struct snd_soc_codec *,
  76                               enum snd_soc_bias_level level);
  77         struct snd_soc_dapm_widget *lout1;
  78         struct snd_soc_dapm_widget *rout1;
  79         struct snd_soc_dapm_widget *out3;
  80         bool deemph;
  81         int playback_fs;
  82 };
  83
  84 #define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
  85
  86 /* enumerated controls */
  87 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
  88         "Right Inverted", "Stereo Inversion"};
  89 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
  90 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
  91 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
  92 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
  93
  94 static const struct soc_enum wm8960_enum[] = {
  95         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
  96         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
  97         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
  98         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
  99         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 100         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 101 };
 102
 103 static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
 104
 105 static int wm8960_set_deemph(struct snd_soc_codec *codec)
 106 {
 107         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 108         int val, i, best;
 109
 110         /* If we're using deemphasis select the nearest available sample
 111          * rate.
 112          */
 113         if (wm8960->deemph) {
 114                 best = 1;
 115                 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
 116                         if (abs(deemph_settings[i] - wm8960->playback_fs) <
 117                             abs(deemph_settings[best] - wm8960->playback_fs))
 118                                 best = i;
 119                 }
 120
 121                 val = best << 1;
 122         } else {
 123                 val = 0;
 124         }
 125
 126         dev_dbg(codec->dev, "Set deemphasis %d\n", val);
 127
 128         return snd_soc_update_bits(codec, WM8960_DACCTL1,
 129                                    0x6, val);
 130 }
 131
 132 static int wm8960_get_deemph(struct snd_kcontrol *kcontrol,
 133                              struct snd_ctl_elem_value *ucontrol)
 134 {
 135         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 136         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 137
 138         ucontrol->value.enumerated.item[0] = wm8960->deemph;
 139         return 0;
 140 }
 141
 142 static int wm8960_put_deemph(struct snd_kcontrol *kcontrol,
 143                              struct snd_ctl_elem_value *ucontrol)
 144 {
 145         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 146         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 147         int deemph = ucontrol->value.enumerated.item[0];
 148
 149         if (deemph > 1)
 150                 return -EINVAL;
 151
 152         wm8960->deemph = deemph;
 153
 154         return wm8960_set_deemph(codec);
 155 }
 156
 157 static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
 158 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
 159 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
 160 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 161
 162 static const struct snd_kcontrol_new wm8960_snd_controls[] = {
 163 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
 164                  0, 63, 0, adc_tlv),
 165 SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
 166         6, 1, 0),
 167 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
 168         7, 1, 0),
 169
 170 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
 171                  0, 255, 0, dac_tlv),
 172
 173 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
 174                  0, 127, 0, out_tlv),
 175 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
 176         7, 1, 0),
 177
 178 SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
 179                  0, 127, 0, out_tlv),
 180 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
 181         7, 1, 0),
 182 SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
 183 SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
 184
 185 SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
 186 SOC_ENUM("ADC Polarity", wm8960_enum[0]),
 187 SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
 188
 189 SOC_ENUM("DAC Polarity", wm8960_enum[2]),
 190 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
 191                     wm8960_get_deemph, wm8960_put_deemph),
 192
 193 SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[2]),
 194 SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[3]),
 195 SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
 196 SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
 197
 198 SOC_ENUM("ALC Function", wm8960_enum[4]),
 199 SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
 200 SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
 201 SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
 202 SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
 203 SOC_ENUM("ALC Mode", wm8960_enum[5]),
 204 SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
 205 SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
 206
 207 SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
 208 SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
 209
 210 SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
 211         0, 127, 0),
 212
 213 SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
 214                WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
 215 SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
 216                WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
 217 SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
 218                WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
 219 SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
 220                WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
 221 };
 222
 223 static const struct snd_kcontrol_new wm8960_lin_boost[] = {
 224 SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
 225 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
 226 SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
 227 };
 228
 229 static const struct snd_kcontrol_new wm8960_lin[] = {
 230 SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
 231 };
 232
 233 static const struct snd_kcontrol_new wm8960_rin_boost[] = {
 234 SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
 235 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
 236 SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
 237 };
 238
 239 static const struct snd_kcontrol_new wm8960_rin[] = {
 240 SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
 241 };
 242
 243 static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
 244 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
 245 SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
 246 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
 247 };
 248
 249 static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
 250 SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
 251 SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
 252 SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
 253 };
 254
 255 static const struct snd_kcontrol_new wm8960_mono_out[] = {
 256 SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
 257 SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
 258 };
 259
 260 static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
 261 SND_SOC_DAPM_INPUT("LINPUT1"),
 262 SND_SOC_DAPM_INPUT("RINPUT1"),
 263 SND_SOC_DAPM_INPUT("LINPUT2"),
 264 SND_SOC_DAPM_INPUT("RINPUT2"),
 265 SND_SOC_DAPM_INPUT("LINPUT3"),
 266 SND_SOC_DAPM_INPUT("RINPUT3"),
 267
 268 SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
 269
 270 SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
 271                    wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
 272 SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
 273                    wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
 274
 275 SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
 276                    wm8960_lin, ARRAY_SIZE(wm8960_lin)),
 277 SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
 278                    wm8960_rin, ARRAY_SIZE(wm8960_rin)),
 279
 280 SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
 281 SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
 282
 283 SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
 284 SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
 285
 286 SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
 287         &wm8960_loutput_mixer[0],
 288         ARRAY_SIZE(wm8960_loutput_mixer)),
 289 SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
 290         &wm8960_routput_mixer[0],
 291         ARRAY_SIZE(wm8960_routput_mixer)),
 292
 293 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
 294 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
 295
 296 SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
 297 SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
 298
 299 SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
 300 SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
 301
 302 SND_SOC_DAPM_OUTPUT("SPK_LP"),
 303 SND_SOC_DAPM_OUTPUT("SPK_LN"),
 304 SND_SOC_DAPM_OUTPUT("HP_L"),
 305 SND_SOC_DAPM_OUTPUT("HP_R"),
 306 SND_SOC_DAPM_OUTPUT("SPK_RP"),
 307 SND_SOC_DAPM_OUTPUT("SPK_RN"),
 308 SND_SOC_DAPM_OUTPUT("OUT3"),
 309 };
 310
 311 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_out3[] = {
 312 SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
 313         &wm8960_mono_out[0],
 314         ARRAY_SIZE(wm8960_mono_out)),
 315 };
 316
 317 /* Represent OUT3 as a PGA so that it gets turned on with LOUT1/ROUT1 */
 318 static const struct snd_soc_dapm_widget wm8960_dapm_widgets_capless[] = {
 319 SND_SOC_DAPM_PGA("OUT3 VMID", WM8960_POWER2, 1, 0, NULL, 0),
 320 };
 321
 322 static const struct snd_soc_dapm_route audio_paths[] = {
 323         { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
 324         { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
 325         { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
 326
 327         { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
 328         { "Left Input Mixer", NULL, "LINPUT1", },  /* Really Boost Switch */
 329         { "Left Input Mixer", NULL, "LINPUT2" },
 330         { "Left Input Mixer", NULL, "LINPUT3" },
 331
 332         { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
 333         { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
 334         { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
 335
 336         { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
 337         { "Right Input Mixer", NULL, "RINPUT1", },  /* Really Boost Switch */
 338         { "Right Input Mixer", NULL, "RINPUT2" },
 339         { "Right Input Mixer", NULL, "LINPUT3" },
 340
 341         { "Left ADC", NULL, "Left Input Mixer" },
 342         { "Right ADC", NULL, "Right Input Mixer" },
 343
 344         { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
 345         { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
 346         { "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
 347
 348         { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
 349         { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
 350         { "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
 351
 352         { "LOUT1 PGA", NULL, "Left Output Mixer" },
 353         { "ROUT1 PGA", NULL, "Right Output Mixer" },
 354
 355         { "HP_L", NULL, "LOUT1 PGA" },
 356         { "HP_R", NULL, "ROUT1 PGA" },
 357
 358         { "Left Speaker PGA", NULL, "Left Output Mixer" },
 359         { "Right Speaker PGA", NULL, "Right Output Mixer" },
 360
 361         { "Left Speaker Output", NULL, "Left Speaker PGA" },
 362         { "Right Speaker Output", NULL, "Right Speaker PGA" },
 363
 364         { "SPK_LN", NULL, "Left Speaker Output" },
 365         { "SPK_LP", NULL, "Left Speaker Output" },
 366         { "SPK_RN", NULL, "Right Speaker Output" },
 367         { "SPK_RP", NULL, "Right Speaker Output" },
 368 };
 369
 370 static const struct snd_soc_dapm_route audio_paths_out3[] = {
 371         { "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
 372         { "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
 373
 374         { "OUT3", NULL, "Mono Output Mixer", }
 375 };
 376
 377 static const struct snd_soc_dapm_route audio_paths_capless[] = {
 378         { "HP_L", NULL, "OUT3 VMID" },
 379         { "HP_R", NULL, "OUT3 VMID" },
 380
 381         { "OUT3 VMID", NULL, "Left Output Mixer" },
 382         { "OUT3 VMID", NULL, "Right Output Mixer" },
 383 };
 384
 385 static int wm8960_add_widgets(struct snd_soc_codec *codec)
 386 {
 387         struct wm8960_data *pdata = codec->dev->platform_data;
 388         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 389         struct snd_soc_dapm_context *dapm = &codec->dapm;
 390         struct snd_soc_dapm_widget *w;
 391
 392         snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets,
 393                                   ARRAY_SIZE(wm8960_dapm_widgets));
 394
 395         snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));
 396
 397         /* In capless mode OUT3 is used to provide VMID for the
 398          * headphone outputs, otherwise it is used as a mono mixer.
 399          */
 400         if (pdata && pdata->capless) {
 401                 snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets_capless,
 402                                           ARRAY_SIZE(wm8960_dapm_widgets_capless));
 403
 404                 snd_soc_dapm_add_routes(dapm, audio_paths_capless,
 405                                         ARRAY_SIZE(audio_paths_capless));
 406         } else {
 407                 snd_soc_dapm_new_controls(dapm, wm8960_dapm_widgets_out3,
 408                                           ARRAY_SIZE(wm8960_dapm_widgets_out3));
 409
 410                 snd_soc_dapm_add_routes(dapm, audio_paths_out3,
 411                                         ARRAY_SIZE(audio_paths_out3));
 412         }
 413
 414         /* We need to power up the headphone output stage out of
 415          * sequence for capless mode.  To save scanning the widget
 416          * list each time to find the desired power state do so now
 417          * and save the result.
 418          */
 419         list_for_each_entry(w, &codec->card->widgets, list) {
 420                 if (w->dapm != &codec->dapm)
 421                         continue;
 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                         snd_soc_cache_sync(codec);
 578
 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                 case SND_SOC_BIAS_OFF:
 682                         snd_soc_cache_sync(codec);
 683                         break;
 684                 default:
 685                         break;
 686                 }
 687                 break;
 688
 689         case SND_SOC_BIAS_STANDBY:
 690                 switch (codec->dapm.bias_level) {
 691                 case SND_SOC_BIAS_PREPARE:
 692                         /* Disable HP discharge */
 693                         snd_soc_update_bits(codec, WM8960_APOP2,
 694                                             WM8960_DISOP | WM8960_DRES_MASK,
 695                                             0);
 696
 697                         /* Disable anti-pop features */
 698                         snd_soc_update_bits(codec, WM8960_APOP1,
 699                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 700                                             WM8960_BUFDCOPEN,
 701                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 702                                             WM8960_BUFDCOPEN);
 703                         break;
 704
 705                 default:
 706                         break;
 707                 }
 708                 break;
 709
 710         case SND_SOC_BIAS_OFF:
 711                 break;
 712         }
 713
 714         codec->dapm.bias_level = level;
 715
 716         return 0;
 717 }
 718
 719 /* PLL divisors */
 720 struct _pll_div {
 721         u32 pre_div:1;
 722         u32 n:4;
 723         u32 k:24;
 724 };
 725
 726 /* The size in bits of the pll divide multiplied by 10
 727  * to allow rounding later */
 728 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 729
 730 static int pll_factors(unsigned int source, unsigned int target,
 731                        struct _pll_div *pll_div)
 732 {
 733         unsigned long long Kpart;
 734         unsigned int K, Ndiv, Nmod;
 735
 736         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
 737
 738         /* Scale up target to PLL operating frequency */
 739         target *= 4;
 740
 741         Ndiv = target / source;
 742         if (Ndiv < 6) {
 743                 source >>= 1;
 744                 pll_div->pre_div = 1;
 745                 Ndiv = target / source;
 746         } else
 747                 pll_div->pre_div = 0;
 748
 749         if ((Ndiv < 6) || (Ndiv > 12)) {
 750                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
 751                 return -EINVAL;
 752         }
 753
 754         pll_div->n = Ndiv;
 755         Nmod = target % source;
 756         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 757
 758         do_div(Kpart, source);
 759
 760         K = Kpart & 0xFFFFFFFF;
 761
 762         /* Check if we need to round */
 763         if ((K % 10) >= 5)
 764                 K += 5;
 765
 766         /* Move down to proper range now rounding is done */
 767         K /= 10;
 768
 769         pll_div->k = K;
 770
 771         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
 772                  pll_div->n, pll_div->k, pll_div->pre_div);
 773
 774         return 0;
 775 }
 776
 777 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 778                 int source, unsigned int freq_in, unsigned int freq_out)
 779 {
 780         struct snd_soc_codec *codec = codec_dai->codec;
 781         u16 reg;
 782         static struct _pll_div pll_div;
 783         int ret;
 784
 785         if (freq_in && freq_out) {
 786                 ret = pll_factors(freq_in, freq_out, &pll_div);
 787                 if (ret != 0)
 788                         return ret;
 789         }
 790
 791         /* Disable the PLL: even if we are changing the frequency the
 792          * PLL needs to be disabled while we do so. */
 793         snd_soc_write(codec, WM8960_CLOCK1,
 794                      snd_soc_read(codec, WM8960_CLOCK1) & ~1);
 795         snd_soc_write(codec, WM8960_POWER2,
 796                      snd_soc_read(codec, WM8960_POWER2) & ~1);
 797
 798         if (!freq_in || !freq_out)
 799                 return 0;
 800
 801         reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
 802         reg |= pll_div.pre_div << 4;
 803         reg |= pll_div.n;
 804
 805         if (pll_div.k) {
 806                 reg |= 0x20;
 807
 808                 snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
 809                 snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
 810                 snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
 811         }
 812         snd_soc_write(codec, WM8960_PLL1, reg);
 813
 814         /* Turn it on */
 815         snd_soc_write(codec, WM8960_POWER2,
 816                      snd_soc_read(codec, WM8960_POWER2) | 1);
 817         msleep(250);
 818         snd_soc_write(codec, WM8960_CLOCK1,
 819                      snd_soc_read(codec, WM8960_CLOCK1) | 1);
 820
 821         return 0;
 822 }
 823
 824 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 825                 int div_id, int div)
 826 {
 827         struct snd_soc_codec *codec = codec_dai->codec;
 828         u16 reg;
 829
 830         switch (div_id) {
 831         case WM8960_SYSCLKDIV:
 832                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
 833                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 834                 break;
 835         case WM8960_DACDIV:
 836                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
 837                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 838                 break;
 839         case WM8960_OPCLKDIV:
 840                 reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
 841                 snd_soc_write(codec, WM8960_PLL1, reg | div);
 842                 break;
 843         case WM8960_DCLKDIV:
 844                 reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
 845                 snd_soc_write(codec, WM8960_CLOCK2, reg | div);
 846                 break;
 847         case WM8960_TOCLKSEL:
 848                 reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
 849                 snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
 850                 break;
 851         default:
 852                 return -EINVAL;
 853         }
 854
 855         return 0;
 856 }
 857
 858 static int wm8960_set_bias_level(struct snd_soc_codec *codec,
 859                                  enum snd_soc_bias_level level)
 860 {
 861         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 862
 863         return wm8960->set_bias_level(codec, level);
 864 }
 865
 866 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
 867
 868 #define WM8960_FORMATS \
 869         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 870         SNDRV_PCM_FMTBIT_S24_LE)
 871
 872 static struct snd_soc_dai_ops wm8960_dai_ops = {
 873         .hw_params = wm8960_hw_params,
 874         .digital_mute = wm8960_mute,
 875         .set_fmt = wm8960_set_dai_fmt,
 876         .set_clkdiv = wm8960_set_dai_clkdiv,
 877         .set_pll = wm8960_set_dai_pll,
 878 };
 879
 880 static struct snd_soc_dai_driver wm8960_dai = {
 881         .name = "wm8960-hifi",
 882         .playback = {
 883                 .stream_name = "Playback",
 884                 .channels_min = 1,
 885                 .channels_max = 2,
 886                 .rates = WM8960_RATES,
 887                 .formats = WM8960_FORMATS,},
 888         .capture = {
 889                 .stream_name = "Capture",
 890                 .channels_min = 1,
 891                 .channels_max = 2,
 892                 .rates = WM8960_RATES,
 893                 .formats = WM8960_FORMATS,},
 894         .ops = &wm8960_dai_ops,
 895         .symmetric_rates = 1,
 896 };
 897
 898 static int wm8960_suspend(struct snd_soc_codec *codec, pm_message_t state)
 899 {
 900         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 901
 902         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 903         return 0;
 904 }
 905
 906 static int wm8960_resume(struct snd_soc_codec *codec)
 907 {
 908         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 909
 910         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 911         return 0;
 912 }
 913
 914 static int wm8960_probe(struct snd_soc_codec *codec)
 915 {
 916         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 917         struct wm8960_data *pdata = dev_get_platdata(codec->dev);
 918         int ret;
 919         u16 reg;
 920
 921         wm8960->set_bias_level = wm8960_set_bias_level_out3;
 922
 923         if (!pdata) {
 924                 dev_warn(codec->dev, "No platform data supplied\n");
 925         } else {
 926                 if (pdata->dres > WM8960_DRES_MAX) {
 927                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
 928                         pdata->dres = 0;
 929                 }
 930
 931                 if (pdata->capless)
 932                         wm8960->set_bias_level = wm8960_set_bias_level_capless;
 933         }
 934
 935         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8960->control_type);
 936         if (ret < 0) {
 937                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 938                 return ret;
 939         }
 940
 941         ret = wm8960_reset(codec);
 942         if (ret < 0) {
 943                 dev_err(codec->dev, "Failed to issue reset\n");
 944                 return ret;
 945         }
 946
 947         wm8960->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 948
 949         /* Latch the update bits */
 950         reg = snd_soc_read(codec, WM8960_LINVOL);
 951         snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
 952         reg = snd_soc_read(codec, WM8960_RINVOL);
 953         snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
 954         reg = snd_soc_read(codec, WM8960_LADC);
 955         snd_soc_write(codec, WM8960_LADC, reg | 0x100);
 956         reg = snd_soc_read(codec, WM8960_RADC);
 957         snd_soc_write(codec, WM8960_RADC, reg | 0x100);
 958         reg = snd_soc_read(codec, WM8960_LDAC);
 959         snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
 960         reg = snd_soc_read(codec, WM8960_RDAC);
 961         snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
 962         reg = snd_soc_read(codec, WM8960_LOUT1);
 963         snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
 964         reg = snd_soc_read(codec, WM8960_ROUT1);
 965         snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
 966         reg = snd_soc_read(codec, WM8960_LOUT2);
 967         snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
 968         reg = snd_soc_read(codec, WM8960_ROUT2);
 969         snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
 970
 971         snd_soc_add_controls(codec, wm8960_snd_controls,
 972                                      ARRAY_SIZE(wm8960_snd_controls));
 973         wm8960_add_widgets(codec);
 974
 975         return 0;
 976 }
 977
 978 /* power down chip */
 979 static int wm8960_remove(struct snd_soc_codec *codec)
 980 {
 981         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 982
 983         wm8960->set_bias_level(codec, SND_SOC_BIAS_OFF);
 984         return 0;
 985 }
 986
 987 static struct snd_soc_codec_driver soc_codec_dev_wm8960 = {
 988         .probe =        wm8960_probe,
 989         .remove =       wm8960_remove,
 990         .suspend =      wm8960_suspend,
 991         .resume =       wm8960_resume,
 992         .set_bias_level = wm8960_set_bias_level,
 993         .reg_cache_size = ARRAY_SIZE(wm8960_reg),
 994         .reg_word_size = sizeof(u16),
 995         .reg_cache_default = wm8960_reg,
 996 };
 997
 998 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 999 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
1000                                       const struct i2c_device_id *id)
1001 {
1002         struct wm8960_priv *wm8960;
1003         int ret;
1004
1005         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
1006         if (wm8960 == NULL)
1007                 return -ENOMEM;
1008
1009         i2c_set_clientdata(i2c, wm8960);
1010         wm8960->control_type = SND_SOC_I2C;
1011
1012         ret = snd_soc_register_codec(&i2c->dev,
1013                         &soc_codec_dev_wm8960, &wm8960_dai, 1);
1014         if (ret < 0)
1015                 kfree(wm8960);
1016         return ret;
1017 }
1018
1019 static __devexit int wm8960_i2c_remove(struct i2c_client *client)
1020 {
1021         snd_soc_unregister_codec(&client->dev);
1022         kfree(i2c_get_clientdata(client));
1023         return 0;
1024 }
1025
1026 static const struct i2c_device_id wm8960_i2c_id[] = {
1027         { "wm8960", 0 },
1028         { }
1029 };
1030 MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
1031
1032 static struct i2c_driver wm8960_i2c_driver = {
1033         .driver = {
1034                 .name = "wm8960-codec",
1035                 .owner = THIS_MODULE,
1036         },
1037         .probe =    wm8960_i2c_probe,
1038         .remove =   __devexit_p(wm8960_i2c_remove),
1039         .id_table = wm8960_i2c_id,
1040 };
1041 #endif
1042
1043 static int __init wm8960_modinit(void)
1044 {
1045         int ret = 0;
1046 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1047         ret = i2c_add_driver(&wm8960_i2c_driver);
1048         if (ret != 0) {
1049                 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
1050                        ret);
1051         }
1052 #endif
1053         return ret;
1054 }
1055 module_init(wm8960_modinit);
1056
1057 static void __exit wm8960_exit(void)
1058 {
1059 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1060         i2c_del_driver(&wm8960_i2c_driver);
1061 #endif
1062 }
1063 module_exit(wm8960_exit);
1064
1065 MODULE_DESCRIPTION("ASoC WM8960 driver");
1066 MODULE_AUTHOR("Liam Girdwood");
1067 MODULE_LICENSE("GPL");