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 struct snd_soc_codec_device soc_codec_dev_wm8960;
  33
  34 /* R25 - Power 1 */
  35 #define WM8960_VMID_MASK 0x180
  36 #define WM8960_VREF      0x40
  37
  38 /* R26 - Power 2 */
  39 #define WM8960_PWR2_LOUT1       0x40
  40 #define WM8960_PWR2_ROUT1       0x20
  41 #define WM8960_PWR2_OUT3        0x02
  42
  43 /* R28 - Anti-pop 1 */
  44 #define WM8960_POBCTRL   0x80
  45 #define WM8960_BUFDCOPEN 0x10
  46 #define WM8960_BUFIOEN   0x08
  47 #define WM8960_SOFT_ST   0x04
  48 #define WM8960_HPSTBY    0x01
  49
  50 /* R29 - Anti-pop 2 */
  51 #define WM8960_DISOP     0x40
  52 #define WM8960_DRES_MASK 0x30
  53
  54 /*
  55  * wm8960 register cache
  56  * We can't read the WM8960 register space when we are
  57  * using 2 wire for device control, so we cache them instead.
  58  */
  59 static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
  60         0x0097, 0x0097, 0x0000, 0x0000,
  61         0x0000, 0x0008, 0x0000, 0x000a,
  62         0x01c0, 0x0000, 0x00ff, 0x00ff,
  63         0x0000, 0x0000, 0x0000, 0x0000,
  64         0x0000, 0x007b, 0x0100, 0x0032,
  65         0x0000, 0x00c3, 0x00c3, 0x01c0,
  66         0x0000, 0x0000, 0x0000, 0x0000,
  67         0x0000, 0x0000, 0x0000, 0x0000,
  68         0x0100, 0x0100, 0x0050, 0x0050,
  69         0x0050, 0x0050, 0x0000, 0x0000,
  70         0x0000, 0x0000, 0x0040, 0x0000,
  71         0x0000, 0x0050, 0x0050, 0x0000,
  72         0x0002, 0x0037, 0x004d, 0x0080,
  73         0x0008, 0x0031, 0x0026, 0x00e9,
  74 };
  75
  76 struct wm8960_priv {
  77         u16 reg_cache[WM8960_CACHEREGNUM];
  78         struct snd_soc_codec codec;
  79         struct snd_soc_dapm_widget *lout1;
  80         struct snd_soc_dapm_widget *rout1;
  81         struct snd_soc_dapm_widget *out3;
  82         bool deemph;
  83         int playback_fs;
  84 };
  85
  86 #define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
  87
  88 /* enumerated controls */
  89 static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
  90         "Right Inverted", "Stereo Inversion"};
  91 static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
  92 static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
  93 static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
  94 static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
  95
  96 static const struct soc_enum wm8960_enum[] = {
  97         SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
  98         SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
  99         SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
 100         SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
 101         SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
 102         SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
 103 };
 104
 105 static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
 106
 107 static int wm8960_set_deemph(struct snd_soc_codec *codec)
 108 {
 109         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 110         int val, i, best;
 111
 112         /* If we're using deemphasis select the nearest available sample
 113          * rate.
 114          */
 115         if (wm8960->deemph) {
 116                 best = 1;
 117                 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
 118                         if (abs(deemph_settings[i] - wm8960->playback_fs) <
 119                             abs(deemph_settings[best] - wm8960->playback_fs))
 120                                 best = i;
 121                 }
 122
 123                 val = best << 1;
 124         } else {
 125                 val = 0;
 126         }
 127
 128         dev_dbg(codec->dev, "Set deemphasis %d\n", val);
 129
 130         return snd_soc_update_bits(codec, WM8960_DACCTL1,
 131                                    0x6, val);
 132 }
 133
 134 static int wm8960_get_deemph(struct snd_kcontrol *kcontrol,
 135                              struct snd_ctl_elem_value *ucontrol)
 136 {
 137         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 138         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 139
 140         return wm8960->deemph;
 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_widget *w;
 391
 392         snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets,
 393                                   ARRAY_SIZE(wm8960_dapm_widgets));
 394
 395         snd_soc_dapm_add_routes(codec, 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(codec, wm8960_dapm_widgets_capless,
 402                                           ARRAY_SIZE(wm8960_dapm_widgets_capless));
 403
 404                 snd_soc_dapm_add_routes(codec, audio_paths_capless,
 405                                         ARRAY_SIZE(audio_paths_capless));
 406         } else {
 407                 snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets_out3,
 408                                           ARRAY_SIZE(wm8960_dapm_widgets_out3));
 409
 410                 snd_soc_dapm_add_routes(codec, 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->dapm_widgets, list) {
 420                 if (strcmp(w->name, "LOUT1 PGA") == 0)
 421                         wm8960->lout1 = w;
 422                 if (strcmp(w->name, "ROUT1 PGA") == 0)
 423                         wm8960->rout1 = w;
 424                 if (strcmp(w->name, "OUT3 VMID") == 0)
 425                         wm8960->out3 = w;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
 432                 unsigned int fmt)
 433 {
 434         struct snd_soc_codec *codec = codec_dai->codec;
 435         u16 iface = 0;
 436
 437         /* set master/slave audio interface */
 438         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 439         case SND_SOC_DAIFMT_CBM_CFM:
 440                 iface |= 0x0040;
 441                 break;
 442         case SND_SOC_DAIFMT_CBS_CFS:
 443                 break;
 444         default:
 445                 return -EINVAL;
 446         }
 447
 448         /* interface format */
 449         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 450         case SND_SOC_DAIFMT_I2S:
 451                 iface |= 0x0002;
 452                 break;
 453         case SND_SOC_DAIFMT_RIGHT_J:
 454                 break;
 455         case SND_SOC_DAIFMT_LEFT_J:
 456                 iface |= 0x0001;
 457                 break;
 458         case SND_SOC_DAIFMT_DSP_A:
 459                 iface |= 0x0003;
 460                 break;
 461         case SND_SOC_DAIFMT_DSP_B:
 462                 iface |= 0x0013;
 463                 break;
 464         default:
 465                 return -EINVAL;
 466         }
 467
 468         /* clock inversion */
 469         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 470         case SND_SOC_DAIFMT_NB_NF:
 471                 break;
 472         case SND_SOC_DAIFMT_IB_IF:
 473                 iface |= 0x0090;
 474                 break;
 475         case SND_SOC_DAIFMT_IB_NF:
 476                 iface |= 0x0080;
 477                 break;
 478         case SND_SOC_DAIFMT_NB_IF:
 479                 iface |= 0x0010;
 480                 break;
 481         default:
 482                 return -EINVAL;
 483         }
 484
 485         /* set iface */
 486         snd_soc_write(codec, WM8960_IFACE1, iface);
 487         return 0;
 488 }
 489
 490 static struct {
 491         int rate;
 492         unsigned int val;
 493 } alc_rates[] = {
 494         { 48000, 0 },
 495         { 44100, 0 },
 496         { 32000, 1 },
 497         { 22050, 2 },
 498         { 24000, 2 },
 499         { 16000, 3 },
 500         { 11250, 4 },
 501         { 12000, 4 },
 502         {  8000, 5 },
 503 };
 504
 505 static int wm8960_hw_params(struct snd_pcm_substream *substream,
 506                             struct snd_pcm_hw_params *params,
 507                             struct snd_soc_dai *dai)
 508 {
 509         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 510         struct snd_soc_device *socdev = rtd->socdev;
 511         struct snd_soc_codec *codec = socdev->card->codec;
 512         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 513         u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
 514         int i;
 515
 516         /* bit size */
 517         switch (params_format(params)) {
 518         case SNDRV_PCM_FORMAT_S16_LE:
 519                 break;
 520         case SNDRV_PCM_FORMAT_S20_3LE:
 521                 iface |= 0x0004;
 522                 break;
 523         case SNDRV_PCM_FORMAT_S24_LE:
 524                 iface |= 0x0008;
 525                 break;
 526         }
 527
 528         /* Update filters for the new rate */
 529         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 530                 wm8960->playback_fs = params_rate(params);
 531                 wm8960_set_deemph(codec);
 532         } else {
 533                 for (i = 0; i < ARRAY_SIZE(alc_rates); i++)
 534                         if (alc_rates[i].rate == params_rate(params))
 535                                 snd_soc_update_bits(codec,
 536                                                     WM8960_ADDCTL3, 0x7,
 537                                                     alc_rates[i].val);
 538         }
 539
 540         /* set iface */
 541         snd_soc_write(codec, WM8960_IFACE1, iface);
 542         return 0;
 543 }
 544
 545 static int wm8960_mute(struct snd_soc_dai *dai, int mute)
 546 {
 547         struct snd_soc_codec *codec = dai->codec;
 548         u16 mute_reg = snd_soc_read(codec, WM8960_DACCTL1) & 0xfff7;
 549
 550         if (mute)
 551                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
 552         else
 553                 snd_soc_write(codec, WM8960_DACCTL1, mute_reg);
 554         return 0;
 555 }
 556
 557 static int wm8960_set_bias_level_out3(struct snd_soc_codec *codec,
 558                                       enum snd_soc_bias_level level)
 559 {
 560         u16 reg;
 561
 562         switch (level) {
 563         case SND_SOC_BIAS_ON:
 564                 break;
 565
 566         case SND_SOC_BIAS_PREPARE:
 567                 /* Set VMID to 2x50k */
 568                 reg = snd_soc_read(codec, WM8960_POWER1);
 569                 reg &= ~0x180;
 570                 reg |= 0x80;
 571                 snd_soc_write(codec, WM8960_POWER1, reg);
 572                 break;
 573
 574         case SND_SOC_BIAS_STANDBY:
 575                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 576                         /* Enable anti-pop features */
 577                         snd_soc_write(codec, WM8960_APOP1,
 578                                       WM8960_POBCTRL | WM8960_SOFT_ST |
 579                                       WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 580
 581                         /* Enable & ramp VMID at 2x50k */
 582                         reg = snd_soc_read(codec, WM8960_POWER1);
 583                         reg |= 0x80;
 584                         snd_soc_write(codec, WM8960_POWER1, reg);
 585                         msleep(100);
 586
 587                         /* Enable VREF */
 588                         snd_soc_write(codec, WM8960_POWER1, reg | WM8960_VREF);
 589
 590                         /* Disable anti-pop features */
 591                         snd_soc_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
 592                 }
 593
 594                 /* Set VMID to 2x250k */
 595                 reg = snd_soc_read(codec, WM8960_POWER1);
 596                 reg &= ~0x180;
 597                 reg |= 0x100;
 598                 snd_soc_write(codec, WM8960_POWER1, reg);
 599                 break;
 600
 601         case SND_SOC_BIAS_OFF:
 602                 /* Enable anti-pop features */
 603                 snd_soc_write(codec, WM8960_APOP1,
 604                              WM8960_POBCTRL | WM8960_SOFT_ST |
 605                              WM8960_BUFDCOPEN | WM8960_BUFIOEN);
 606
 607                 /* Disable VMID and VREF, let them discharge */
 608                 snd_soc_write(codec, WM8960_POWER1, 0);
 609                 msleep(600);
 610                 break;
 611         }
 612
 613         codec->bias_level = level;
 614
 615         return 0;
 616 }
 617
 618 static int wm8960_set_bias_level_capless(struct snd_soc_codec *codec,
 619                                          enum snd_soc_bias_level level)
 620 {
 621         struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 622         int reg;
 623
 624         switch (level) {
 625         case SND_SOC_BIAS_ON:
 626                 break;
 627
 628         case SND_SOC_BIAS_PREPARE:
 629                 switch (codec->bias_level) {
 630                 case SND_SOC_BIAS_STANDBY:
 631                         /* Enable anti pop mode */
 632                         snd_soc_update_bits(codec, WM8960_APOP1,
 633                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 634                                             WM8960_BUFDCOPEN,
 635                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 636                                             WM8960_BUFDCOPEN);
 637
 638                         /* Enable LOUT1, ROUT1 and OUT3 if they're enabled */
 639                         reg = 0;
 640                         if (wm8960->lout1 && wm8960->lout1->power)
 641                                 reg |= WM8960_PWR2_LOUT1;
 642                         if (wm8960->rout1 && wm8960->rout1->power)
 643                                 reg |= WM8960_PWR2_ROUT1;
 644                         if (wm8960->out3 && wm8960->out3->power)
 645                                 reg |= WM8960_PWR2_OUT3;
 646                         snd_soc_update_bits(codec, WM8960_POWER2,
 647                                             WM8960_PWR2_LOUT1 |
 648                                             WM8960_PWR2_ROUT1 |
 649                                             WM8960_PWR2_OUT3, reg);
 650
 651                         /* Enable VMID at 2*50k */
 652                         snd_soc_update_bits(codec, WM8960_POWER1,
 653                                             WM8960_VMID_MASK, 0x80);
 654
 655                         /* Ramp */
 656                         msleep(100);
 657
 658                         /* Enable VREF */
 659                         snd_soc_update_bits(codec, WM8960_POWER1,
 660                                             WM8960_VREF, WM8960_VREF);
 661
 662                         msleep(100);
 663                         break;
 664
 665                 case SND_SOC_BIAS_ON:
 666                         /* Enable anti-pop mode */
 667                         snd_soc_update_bits(codec, WM8960_APOP1,
 668                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 669                                             WM8960_BUFDCOPEN,
 670                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 671                                             WM8960_BUFDCOPEN);
 672
 673                         /* Disable VMID and VREF */
 674                         snd_soc_update_bits(codec, WM8960_POWER1,
 675                                             WM8960_VREF | WM8960_VMID_MASK, 0);
 676                         break;
 677
 678                 default:
 679                         break;
 680                 }
 681                 break;
 682
 683         case SND_SOC_BIAS_STANDBY:
 684                 switch (codec->bias_level) {
 685                 case SND_SOC_BIAS_PREPARE:
 686                         /* Disable HP discharge */
 687                         snd_soc_update_bits(codec, WM8960_APOP2,
 688                                             WM8960_DISOP | WM8960_DRES_MASK,
 689                                             0);
 690
 691                         /* Disable anti-pop features */
 692                         snd_soc_update_bits(codec, WM8960_APOP1,
 693                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 694                                             WM8960_BUFDCOPEN,
 695                                             WM8960_POBCTRL | WM8960_SOFT_ST |
 696                                             WM8960_BUFDCOPEN);
 697                         break;
 698
 699                 default:
 700                         break;
 701                 }
 702                 break;
 703
 704         case SND_SOC_BIAS_OFF:
 705                 break;
 706         }
 707
 708         codec->bias_level = level;
 709
 710         return 0;
 711 }
 712
 713 /* PLL divisors */
 714 struct _pll_div {
 715         u32 pre_div:1;
 716         u32 n:4;
 717         u32 k:24;
 718 };
 719
 720 /* The size in bits of the pll divide multiplied by 10
 721  * to allow rounding later */
 722 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 723
 724 static int pll_factors(unsigned int source, unsigned int target,
 725                        struct _pll_div *pll_div)
 726 {
 727         unsigned long long Kpart;
 728         unsigned int K, Ndiv, Nmod;
 729
 730         pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
 731
 732         /* Scale up target to PLL operating frequency */
 733         target *= 4;
 734
 735         Ndiv = target / source;
 736         if (Ndiv < 6) {
 737                 source >>= 1;
 738                 pll_div->pre_div = 1;
 739                 Ndiv = target / source;
 740         } else
 741                 pll_div->pre_div = 0;
 742
 743         if ((Ndiv < 6) || (Ndiv > 12)) {
 744                 pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
 745                 return -EINVAL;
 746         }
 747
 748         pll_div->n = Ndiv;
 749         Nmod = target % source;
 750         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 751
 752         do_div(Kpart, source);
 753
 754         K = Kpart & 0xFFFFFFFF;
 755
 756         /* Check if we need to round */
 757         if ((K % 10) >= 5)
 758                 K += 5;
 759
 760         /* Move down to proper range now rounding is done */
 761         K /= 10;
 762
 763         pll_div->k = K;
 764
 765         pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
 766                  pll_div->n, pll_div->k, pll_div->pre_div);
 767
 768         return 0;
 769 }
 770
 771 static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
 772                 int source, unsigned int freq_in, unsigned int freq_out)
 773 {
 774         struct snd_soc_codec *codec = codec_dai->codec;
 775         u16 reg;
 776         static struct _pll_div pll_div;
 777         int ret;
 778
 779         if (freq_in && freq_out) {
 780                 ret = pll_factors(freq_in, freq_out, &pll_div);
 781                 if (ret != 0)
 782                         return ret;
 783         }
 784
 785         /* Disable the PLL: even if we are changing the frequency the
 786          * PLL needs to be disabled while we do so. */
 787         snd_soc_write(codec, WM8960_CLOCK1,
 788                      snd_soc_read(codec, WM8960_CLOCK1) & ~1);
 789         snd_soc_write(codec, WM8960_POWER2,
 790                      snd_soc_read(codec, WM8960_POWER2) & ~1);
 791
 792         if (!freq_in || !freq_out)
 793                 return 0;
 794
 795         reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
 796         reg |= pll_div.pre_div << 4;
 797         reg |= pll_div.n;
 798
 799         if (pll_div.k) {
 800                 reg |= 0x20;
 801
 802                 snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
 803                 snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
 804                 snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
 805         }
 806         snd_soc_write(codec, WM8960_PLL1, reg);
 807
 808         /* Turn it on */
 809         snd_soc_write(codec, WM8960_POWER2,
 810                      snd_soc_read(codec, WM8960_POWER2) | 1);
 811         msleep(250);
 812         snd_soc_write(codec, WM8960_CLOCK1,
 813                      snd_soc_read(codec, WM8960_CLOCK1) | 1);
 814
 815         return 0;
 816 }
 817
 818 static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 819                 int div_id, int div)
 820 {
 821         struct snd_soc_codec *codec = codec_dai->codec;
 822         u16 reg;
 823
 824         switch (div_id) {
 825         case WM8960_SYSCLKDIV:
 826                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
 827                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 828                 break;
 829         case WM8960_DACDIV:
 830                 reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
 831                 snd_soc_write(codec, WM8960_CLOCK1, reg | div);
 832                 break;
 833         case WM8960_OPCLKDIV:
 834                 reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
 835                 snd_soc_write(codec, WM8960_PLL1, reg | div);
 836                 break;
 837         case WM8960_DCLKDIV:
 838                 reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
 839                 snd_soc_write(codec, WM8960_CLOCK2, reg | div);
 840                 break;
 841         case WM8960_TOCLKSEL:
 842                 reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
 843                 snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
 844                 break;
 845         default:
 846                 return -EINVAL;
 847         }
 848
 849         return 0;
 850 }
 851
 852 #define WM8960_RATES SNDRV_PCM_RATE_8000_48000
 853
 854 #define WM8960_FORMATS \
 855         (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 856         SNDRV_PCM_FMTBIT_S24_LE)
 857
 858 static struct snd_soc_dai_ops wm8960_dai_ops = {
 859         .hw_params = wm8960_hw_params,
 860         .digital_mute = wm8960_mute,
 861         .set_fmt = wm8960_set_dai_fmt,
 862         .set_clkdiv = wm8960_set_dai_clkdiv,
 863         .set_pll = wm8960_set_dai_pll,
 864 };
 865
 866 struct snd_soc_dai wm8960_dai = {
 867         .name = "WM8960",
 868         .playback = {
 869                 .stream_name = "Playback",
 870                 .channels_min = 1,
 871                 .channels_max = 2,
 872                 .rates = WM8960_RATES,
 873                 .formats = WM8960_FORMATS,},
 874         .capture = {
 875                 .stream_name = "Capture",
 876                 .channels_min = 1,
 877                 .channels_max = 2,
 878                 .rates = WM8960_RATES,
 879                 .formats = WM8960_FORMATS,},
 880         .ops = &wm8960_dai_ops,
 881         .symmetric_rates = 1,
 882 };
 883 EXPORT_SYMBOL_GPL(wm8960_dai);
 884
 885 static int wm8960_suspend(struct platform_device *pdev, pm_message_t state)
 886 {
 887         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 888         struct snd_soc_codec *codec = socdev->card->codec;
 889
 890         codec->set_bias_level(codec, SND_SOC_BIAS_OFF);
 891         return 0;
 892 }
 893
 894 static int wm8960_resume(struct platform_device *pdev)
 895 {
 896         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 897         struct snd_soc_codec *codec = socdev->card->codec;
 898         int i;
 899         u8 data[2];
 900         u16 *cache = codec->reg_cache;
 901
 902         /* Sync reg_cache with the hardware */
 903         for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) {
 904                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 905                 data[1] = cache[i] & 0x00ff;
 906                 codec->hw_write(codec->control_data, data, 2);
 907         }
 908
 909         codec->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 910
 911         return 0;
 912 }
 913
 914 static struct snd_soc_codec *wm8960_codec;
 915
 916 static int wm8960_probe(struct platform_device *pdev)
 917 {
 918         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 919         struct snd_soc_codec *codec;
 920         int ret = 0;
 921
 922         if (wm8960_codec == NULL) {
 923                 dev_err(&pdev->dev, "Codec device not registered\n");
 924                 return -ENODEV;
 925         }
 926
 927         socdev->card->codec = wm8960_codec;
 928         codec = wm8960_codec;
 929
 930         /* register pcms */
 931         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 932         if (ret < 0) {
 933                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 934                 goto pcm_err;
 935         }
 936
 937         snd_soc_add_controls(codec, wm8960_snd_controls,
 938                              ARRAY_SIZE(wm8960_snd_controls));
 939         wm8960_add_widgets(codec);
 940
 941         return ret;
 942
 943 pcm_err:
 944         return ret;
 945 }
 946
 947 /* power down chip */
 948 static int wm8960_remove(struct platform_device *pdev)
 949 {
 950         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 951
 952         snd_soc_free_pcms(socdev);
 953         snd_soc_dapm_free(socdev);
 954
 955         return 0;
 956 }
 957
 958 struct snd_soc_codec_device soc_codec_dev_wm8960 = {
 959         .probe =        wm8960_probe,
 960         .remove =       wm8960_remove,
 961         .suspend =      wm8960_suspend,
 962         .resume =       wm8960_resume,
 963 };
 964 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8960);
 965
 966 static int wm8960_register(struct wm8960_priv *wm8960,
 967                            enum snd_soc_control_type control)
 968 {
 969         struct wm8960_data *pdata = wm8960->codec.dev->platform_data;
 970         struct snd_soc_codec *codec = &wm8960->codec;
 971         int ret;
 972         u16 reg;
 973
 974         if (wm8960_codec) {
 975                 dev_err(codec->dev, "Another WM8960 is registered\n");
 976                 ret = -EINVAL;
 977                 goto err;
 978         }
 979
 980         codec->set_bias_level = wm8960_set_bias_level_out3;
 981
 982         if (!pdata) {
 983                 dev_warn(codec->dev, "No platform data supplied\n");
 984         } else {
 985                 if (pdata->dres > WM8960_DRES_MAX) {
 986                         dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
 987                         pdata->dres = 0;
 988                 }
 989
 990                 if (pdata->capless)
 991                         codec->set_bias_level = wm8960_set_bias_level_capless;
 992         }
 993
 994         mutex_init(&codec->mutex);
 995         INIT_LIST_HEAD(&codec->dapm_widgets);
 996         INIT_LIST_HEAD(&codec->dapm_paths);
 997
 998         snd_soc_codec_set_drvdata(codec, wm8960);
 999         codec->name = "WM8960";
1000         codec->owner = THIS_MODULE;
1001         codec->bias_level = SND_SOC_BIAS_OFF;
1002         codec->dai = &wm8960_dai;
1003         codec->num_dai = 1;
1004         codec->reg_cache_size = WM8960_CACHEREGNUM;
1005         codec->reg_cache = &wm8960->reg_cache;
1006
1007         memcpy(codec->reg_cache, wm8960_reg, sizeof(wm8960_reg));
1008
1009         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
1010         if (ret < 0) {
1011                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
1012                 goto err;
1013         }
1014
1015         ret = wm8960_reset(codec);
1016         if (ret < 0) {
1017                 dev_err(codec->dev, "Failed to issue reset\n");
1018                 goto err;
1019         }
1020
1021         wm8960_dai.dev = codec->dev;
1022
1023         codec->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1024
1025         /* Latch the update bits */
1026         reg = snd_soc_read(codec, WM8960_LINVOL);
1027         snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
1028         reg = snd_soc_read(codec, WM8960_RINVOL);
1029         snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
1030         reg = snd_soc_read(codec, WM8960_LADC);
1031         snd_soc_write(codec, WM8960_LADC, reg | 0x100);
1032         reg = snd_soc_read(codec, WM8960_RADC);
1033         snd_soc_write(codec, WM8960_RADC, reg | 0x100);
1034         reg = snd_soc_read(codec, WM8960_LDAC);
1035         snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
1036         reg = snd_soc_read(codec, WM8960_RDAC);
1037         snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
1038         reg = snd_soc_read(codec, WM8960_LOUT1);
1039         snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
1040         reg = snd_soc_read(codec, WM8960_ROUT1);
1041         snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
1042         reg = snd_soc_read(codec, WM8960_LOUT2);
1043         snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
1044         reg = snd_soc_read(codec, WM8960_ROUT2);
1045         snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
1046
1047         wm8960_codec = codec;
1048
1049         ret = snd_soc_register_codec(codec);
1050         if (ret != 0) {
1051                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
1052                 goto err;
1053         }
1054
1055         ret = snd_soc_register_dai(&wm8960_dai);
1056         if (ret != 0) {
1057                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
1058                 goto err_codec;
1059         }
1060
1061         return 0;
1062
1063 err_codec:
1064         snd_soc_unregister_codec(codec);
1065 err:
1066         kfree(wm8960);
1067         return ret;
1068 }
1069
1070 static void wm8960_unregister(struct wm8960_priv *wm8960)
1071 {
1072         wm8960->codec.set_bias_level(&wm8960->codec, SND_SOC_BIAS_OFF);
1073         snd_soc_unregister_dai(&wm8960_dai);
1074         snd_soc_unregister_codec(&wm8960->codec);
1075         kfree(wm8960);
1076         wm8960_codec = NULL;
1077 }
1078
1079 static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
1080                                       const struct i2c_device_id *id)
1081 {
1082         struct wm8960_priv *wm8960;
1083         struct snd_soc_codec *codec;
1084
1085         wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
1086         if (wm8960 == NULL)
1087                 return -ENOMEM;
1088
1089         codec = &wm8960->codec;
1090
1091         i2c_set_clientdata(i2c, wm8960);
1092         codec->control_data = i2c;
1093
1094         codec->dev = &i2c->dev;
1095
1096         return wm8960_register(wm8960, SND_SOC_I2C);
1097 }
1098
1099 static __devexit int wm8960_i2c_remove(struct i2c_client *client)
1100 {
1101         struct wm8960_priv *wm8960 = i2c_get_clientdata(client);
1102         wm8960_unregister(wm8960);
1103         return 0;
1104 }
1105
1106 static const struct i2c_device_id wm8960_i2c_id[] = {
1107         { "wm8960", 0 },
1108         { }
1109 };
1110 MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
1111
1112 static struct i2c_driver wm8960_i2c_driver = {
1113         .driver = {
1114                 .name = "wm8960",
1115                 .owner = THIS_MODULE,
1116         },
1117         .probe =    wm8960_i2c_probe,
1118         .remove =   __devexit_p(wm8960_i2c_remove),
1119         .id_table = wm8960_i2c_id,
1120 };
1121
1122 static int __init wm8960_modinit(void)
1123 {
1124         int ret;
1125
1126         ret = i2c_add_driver(&wm8960_i2c_driver);
1127         if (ret != 0) {
1128                 printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
1129                        ret);
1130         }
1131
1132         return ret;
1133 }
1134 module_init(wm8960_modinit);
1135
1136 static void __exit wm8960_exit(void)
1137 {
1138         i2c_del_driver(&wm8960_i2c_driver);
1139 }
1140 module_exit(wm8960_exit);
1141
1142
1143 MODULE_DESCRIPTION("ASoC WM8960 driver");
1144 MODULE_AUTHOR("Liam Girdwood");
1145 MODULE_LICENSE("GPL");