sound/soc/codecs/wm8750.c

   1 /*
   2  * wm8750.c -- WM8750 ALSA SoC audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <richard@openedhand.com>
   7  *
   8  * Based on WM8753.c
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/spi/spi.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dapm.h>
  28 #include <sound/initval.h>
  29
  30 #include "wm8750.h"
  31
  32 #define AUDIO_NAME "WM8750"
  33 #define WM8750_VERSION "0.12"
  34
  35 /* codec private data */
  36 struct wm8750_priv {
  37         unsigned int sysclk;
  38 };
  39
  40 /*
  41  * wm8750 register cache
  42  * We can't read the WM8750 register space when we
  43  * are using 2 wire for device control, so we cache them instead.
  44  */
  45 static const u16 wm8750_reg[] = {
  46         0x0097, 0x0097, 0x0079, 0x0079,  /*  0 */
  47         0x0000, 0x0008, 0x0000, 0x000a,  /*  4 */
  48         0x0000, 0x0000, 0x00ff, 0x00ff,  /*  8 */
  49         0x000f, 0x000f, 0x0000, 0x0000,  /* 12 */
  50         0x0000, 0x007b, 0x0000, 0x0032,  /* 16 */
  51         0x0000, 0x00c3, 0x00c3, 0x00c0,  /* 20 */
  52         0x0000, 0x0000, 0x0000, 0x0000,  /* 24 */
  53         0x0000, 0x0000, 0x0000, 0x0000,  /* 28 */
  54         0x0000, 0x0000, 0x0050, 0x0050,  /* 32 */
  55         0x0050, 0x0050, 0x0050, 0x0050,  /* 36 */
  56         0x0079, 0x0079, 0x0079,          /* 40 */
  57 };
  58
  59 /*
  60  * read wm8750 register cache
  61  */
  62 static inline unsigned int wm8750_read_reg_cache(struct snd_soc_codec *codec,
  63         unsigned int reg)
  64 {
  65         u16 *cache = codec->reg_cache;
  66         if (reg > WM8750_CACHE_REGNUM)
  67                 return -1;
  68         return cache[reg];
  69 }
  70
  71 /*
  72  * write wm8750 register cache
  73  */
  74 static inline void wm8750_write_reg_cache(struct snd_soc_codec *codec,
  75         unsigned int reg, unsigned int value)
  76 {
  77         u16 *cache = codec->reg_cache;
  78         if (reg > WM8750_CACHE_REGNUM)
  79                 return;
  80         cache[reg] = value;
  81 }
  82
  83 static int wm8750_write(struct snd_soc_codec *codec, unsigned int reg,
  84         unsigned int value)
  85 {
  86         u8 data[2];
  87
  88         /* data is
  89          *   D15..D9 WM8753 register offset
  90          *   D8...D0 register data
  91          */
  92         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
  93         data[1] = value & 0x00ff;
  94
  95         wm8750_write_reg_cache(codec, reg, value);
  96         if (codec->hw_write(codec->control_data, data, 2) == 2)
  97                 return 0;
  98         else
  99                 return -EIO;
 100 }
 101
 102 #define wm8750_reset(c) wm8750_write(c, WM8750_RESET, 0)
 103
 104 /*
 105  * WM8750 Controls
 106  */
 107 static const char *wm8750_bass[] = {"Linear Control", "Adaptive Boost"};
 108 static const char *wm8750_bass_filter[] = { "130Hz @ 48kHz", "200Hz @ 48kHz" };
 109 static const char *wm8750_treble[] = {"8kHz", "4kHz"};
 110 static const char *wm8750_3d_lc[] = {"200Hz", "500Hz"};
 111 static const char *wm8750_3d_uc[] = {"2.2kHz", "1.5kHz"};
 112 static const char *wm8750_3d_func[] = {"Capture", "Playback"};
 113 static const char *wm8750_alc_func[] = {"Off", "Right", "Left", "Stereo"};
 114 static const char *wm8750_ng_type[] = {"Constant PGA Gain",
 115         "Mute ADC Output"};
 116 static const char *wm8750_line_mux[] = {"Line 1", "Line 2", "Line 3", "PGA",
 117         "Differential"};
 118 static const char *wm8750_pga_sel[] = {"Line 1", "Line 2", "Line 3",
 119         "Differential"};
 120 static const char *wm8750_out3[] = {"VREF", "ROUT1 + Vol", "MonoOut",
 121         "ROUT1"};
 122 static const char *wm8750_diff_sel[] = {"Line 1", "Line 2"};
 123 static const char *wm8750_adcpol[] = {"Normal", "L Invert", "R Invert",
 124         "L + R Invert"};
 125 static const char *wm8750_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 126 static const char *wm8750_mono_mux[] = {"Stereo", "Mono (Left)",
 127         "Mono (Right)", "Digital Mono"};
 128
 129 static const struct soc_enum wm8750_enum[] = {
 130 SOC_ENUM_SINGLE(WM8750_BASS, 7, 2, wm8750_bass),
 131 SOC_ENUM_SINGLE(WM8750_BASS, 6, 2, wm8750_bass_filter),
 132 SOC_ENUM_SINGLE(WM8750_TREBLE, 6, 2, wm8750_treble),
 133 SOC_ENUM_SINGLE(WM8750_3D, 5, 2, wm8750_3d_lc),
 134 SOC_ENUM_SINGLE(WM8750_3D, 6, 2, wm8750_3d_uc),
 135 SOC_ENUM_SINGLE(WM8750_3D, 7, 2, wm8750_3d_func),
 136 SOC_ENUM_SINGLE(WM8750_ALC1, 7, 4, wm8750_alc_func),
 137 SOC_ENUM_SINGLE(WM8750_NGATE, 1, 2, wm8750_ng_type),
 138 SOC_ENUM_SINGLE(WM8750_LOUTM1, 0, 5, wm8750_line_mux),
 139 SOC_ENUM_SINGLE(WM8750_ROUTM1, 0, 5, wm8750_line_mux),
 140 SOC_ENUM_SINGLE(WM8750_LADCIN, 6, 4, wm8750_pga_sel), /* 10 */
 141 SOC_ENUM_SINGLE(WM8750_RADCIN, 6, 4, wm8750_pga_sel),
 142 SOC_ENUM_SINGLE(WM8750_ADCTL2, 7, 4, wm8750_out3),
 143 SOC_ENUM_SINGLE(WM8750_ADCIN, 8, 2, wm8750_diff_sel),
 144 SOC_ENUM_SINGLE(WM8750_ADCDAC, 5, 4, wm8750_adcpol),
 145 SOC_ENUM_SINGLE(WM8750_ADCDAC, 1, 4, wm8750_deemph),
 146 SOC_ENUM_SINGLE(WM8750_ADCIN, 6, 4, wm8750_mono_mux), /* 16 */
 147
 148 };
 149
 150 static const struct snd_kcontrol_new wm8750_snd_controls[] = {
 151
 152 SOC_DOUBLE_R("Capture Volume", WM8750_LINVOL, WM8750_RINVOL, 0, 63, 0),
 153 SOC_DOUBLE_R("Capture ZC Switch", WM8750_LINVOL, WM8750_RINVOL, 6, 1, 0),
 154 SOC_DOUBLE_R("Capture Switch", WM8750_LINVOL, WM8750_RINVOL, 7, 1, 1),
 155
 156 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8750_LOUT1V,
 157         WM8750_ROUT1V, 7, 1, 0),
 158 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8750_LOUT2V,
 159         WM8750_ROUT2V, 7, 1, 0),
 160
 161 SOC_ENUM("Playback De-emphasis", wm8750_enum[15]),
 162
 163 SOC_ENUM("Capture Polarity", wm8750_enum[14]),
 164 SOC_SINGLE("Playback 6dB Attenuate", WM8750_ADCDAC, 7, 1, 0),
 165 SOC_SINGLE("Capture 6dB Attenuate", WM8750_ADCDAC, 8, 1, 0),
 166
 167 SOC_DOUBLE_R("PCM Volume", WM8750_LDAC, WM8750_RDAC, 0, 255, 0),
 168
 169 SOC_ENUM("Bass Boost", wm8750_enum[0]),
 170 SOC_ENUM("Bass Filter", wm8750_enum[1]),
 171 SOC_SINGLE("Bass Volume", WM8750_BASS, 0, 15, 1),
 172
 173 SOC_SINGLE("Treble Volume", WM8750_TREBLE, 0, 15, 1),
 174 SOC_ENUM("Treble Cut-off", wm8750_enum[2]),
 175
 176 SOC_SINGLE("3D Switch", WM8750_3D, 0, 1, 0),
 177 SOC_SINGLE("3D Volume", WM8750_3D, 1, 15, 0),
 178 SOC_ENUM("3D Lower Cut-off", wm8750_enum[3]),
 179 SOC_ENUM("3D Upper Cut-off", wm8750_enum[4]),
 180 SOC_ENUM("3D Mode", wm8750_enum[5]),
 181
 182 SOC_SINGLE("ALC Capture Target Volume", WM8750_ALC1, 0, 7, 0),
 183 SOC_SINGLE("ALC Capture Max Volume", WM8750_ALC1, 4, 7, 0),
 184 SOC_ENUM("ALC Capture Function", wm8750_enum[6]),
 185 SOC_SINGLE("ALC Capture ZC Switch", WM8750_ALC2, 7, 1, 0),
 186 SOC_SINGLE("ALC Capture Hold Time", WM8750_ALC2, 0, 15, 0),
 187 SOC_SINGLE("ALC Capture Decay Time", WM8750_ALC3, 4, 15, 0),
 188 SOC_SINGLE("ALC Capture Attack Time", WM8750_ALC3, 0, 15, 0),
 189 SOC_SINGLE("ALC Capture NG Threshold", WM8750_NGATE, 3, 31, 0),
 190 SOC_ENUM("ALC Capture NG Type", wm8750_enum[4]),
 191 SOC_SINGLE("ALC Capture NG Switch", WM8750_NGATE, 0, 1, 0),
 192
 193 SOC_SINGLE("Left ADC Capture Volume", WM8750_LADC, 0, 255, 0),
 194 SOC_SINGLE("Right ADC Capture Volume", WM8750_RADC, 0, 255, 0),
 195
 196 SOC_SINGLE("ZC Timeout Switch", WM8750_ADCTL1, 0, 1, 0),
 197 SOC_SINGLE("Playback Invert Switch", WM8750_ADCTL1, 1, 1, 0),
 198
 199 SOC_SINGLE("Right Speaker Playback Invert Switch", WM8750_ADCTL2, 4, 1, 0),
 200
 201 /* Unimplemented */
 202 /* ADCDAC Bit 0 - ADCHPD */
 203 /* ADCDAC Bit 4 - HPOR */
 204 /* ADCTL1 Bit 2,3 - DATSEL */
 205 /* ADCTL1 Bit 4,5 - DMONOMIX */
 206 /* ADCTL1 Bit 6,7 - VSEL */
 207 /* ADCTL2 Bit 2 - LRCM */
 208 /* ADCTL2 Bit 3 - TRI */
 209 /* ADCTL3 Bit 5 - HPFLREN */
 210 /* ADCTL3 Bit 6 - VROI */
 211 /* ADCTL3 Bit 7,8 - ADCLRM */
 212 /* ADCIN Bit 4 - LDCM */
 213 /* ADCIN Bit 5 - RDCM */
 214
 215 SOC_DOUBLE_R("Mic Boost", WM8750_LADCIN, WM8750_RADCIN, 4, 3, 0),
 216
 217 SOC_DOUBLE_R("Bypass Left Playback Volume", WM8750_LOUTM1,
 218         WM8750_LOUTM2, 4, 7, 1),
 219 SOC_DOUBLE_R("Bypass Right Playback Volume", WM8750_ROUTM1,
 220         WM8750_ROUTM2, 4, 7, 1),
 221 SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8750_MOUTM1,
 222         WM8750_MOUTM2, 4, 7, 1),
 223
 224 SOC_SINGLE("Mono Playback ZC Switch", WM8750_MOUTV, 7, 1, 0),
 225
 226 SOC_DOUBLE_R("Headphone Playback Volume", WM8750_LOUT1V, WM8750_ROUT1V,
 227         0, 127, 0),
 228 SOC_DOUBLE_R("Speaker Playback Volume", WM8750_LOUT2V, WM8750_ROUT2V,
 229         0, 127, 0),
 230
 231 SOC_SINGLE("Mono Playback Volume", WM8750_MOUTV, 0, 127, 0),
 232
 233 };
 234
 235 /* add non dapm controls */
 236 static int wm8750_add_controls(struct snd_soc_codec *codec)
 237 {
 238         int err, i;
 239
 240         for (i = 0; i < ARRAY_SIZE(wm8750_snd_controls); i++) {
 241                 err = snd_ctl_add(codec->card,
 242                                 snd_soc_cnew(&wm8750_snd_controls[i],
 243                                                 codec, NULL));
 244                 if (err < 0)
 245                         return err;
 246         }
 247         return 0;
 248 }
 249
 250 /*
 251  * DAPM Controls
 252  */
 253
 254 /* Left Mixer */
 255 static const struct snd_kcontrol_new wm8750_left_mixer_controls[] = {
 256 SOC_DAPM_SINGLE("Playback Switch", WM8750_LOUTM1, 8, 1, 0),
 257 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_LOUTM1, 7, 1, 0),
 258 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_LOUTM2, 8, 1, 0),
 259 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_LOUTM2, 7, 1, 0),
 260 };
 261
 262 /* Right Mixer */
 263 static const struct snd_kcontrol_new wm8750_right_mixer_controls[] = {
 264 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_ROUTM1, 8, 1, 0),
 265 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_ROUTM1, 7, 1, 0),
 266 SOC_DAPM_SINGLE("Playback Switch", WM8750_ROUTM2, 8, 1, 0),
 267 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_ROUTM2, 7, 1, 0),
 268 };
 269
 270 /* Mono Mixer */
 271 static const struct snd_kcontrol_new wm8750_mono_mixer_controls[] = {
 272 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_MOUTM1, 8, 1, 0),
 273 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_MOUTM1, 7, 1, 0),
 274 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_MOUTM2, 8, 1, 0),
 275 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_MOUTM2, 7, 1, 0),
 276 };
 277
 278 /* Left Line Mux */
 279 static const struct snd_kcontrol_new wm8750_left_line_controls =
 280 SOC_DAPM_ENUM("Route", wm8750_enum[8]);
 281
 282 /* Right Line Mux */
 283 static const struct snd_kcontrol_new wm8750_right_line_controls =
 284 SOC_DAPM_ENUM("Route", wm8750_enum[9]);
 285
 286 /* Left PGA Mux */
 287 static const struct snd_kcontrol_new wm8750_left_pga_controls =
 288 SOC_DAPM_ENUM("Route", wm8750_enum[10]);
 289
 290 /* Right PGA Mux */
 291 static const struct snd_kcontrol_new wm8750_right_pga_controls =
 292 SOC_DAPM_ENUM("Route", wm8750_enum[11]);
 293
 294 /* Out 3 Mux */
 295 static const struct snd_kcontrol_new wm8750_out3_controls =
 296 SOC_DAPM_ENUM("Route", wm8750_enum[12]);
 297
 298 /* Differential Mux */
 299 static const struct snd_kcontrol_new wm8750_diffmux_controls =
 300 SOC_DAPM_ENUM("Route", wm8750_enum[13]);
 301
 302 /* Mono ADC Mux */
 303 static const struct snd_kcontrol_new wm8750_monomux_controls =
 304 SOC_DAPM_ENUM("Route", wm8750_enum[16]);
 305
 306 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 307         SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
 308                 &wm8750_left_mixer_controls[0],
 309                 ARRAY_SIZE(wm8750_left_mixer_controls)),
 310         SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
 311                 &wm8750_right_mixer_controls[0],
 312                 ARRAY_SIZE(wm8750_right_mixer_controls)),
 313         SND_SOC_DAPM_MIXER("Mono Mixer", WM8750_PWR2, 2, 0,
 314                 &wm8750_mono_mixer_controls[0],
 315                 ARRAY_SIZE(wm8750_mono_mixer_controls)),
 316
 317         SND_SOC_DAPM_PGA("Right Out 2", WM8750_PWR2, 3, 0, NULL, 0),
 318         SND_SOC_DAPM_PGA("Left Out 2", WM8750_PWR2, 4, 0, NULL, 0),
 319         SND_SOC_DAPM_PGA("Right Out 1", WM8750_PWR2, 5, 0, NULL, 0),
 320         SND_SOC_DAPM_PGA("Left Out 1", WM8750_PWR2, 6, 0, NULL, 0),
 321         SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8750_PWR2, 7, 0),
 322         SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8750_PWR2, 8, 0),
 323
 324         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8750_PWR1, 1, 0),
 325         SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8750_PWR1, 2, 0),
 326         SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8750_PWR1, 3, 0),
 327
 328         SND_SOC_DAPM_MUX("Left PGA Mux", WM8750_PWR1, 5, 0,
 329                 &wm8750_left_pga_controls),
 330         SND_SOC_DAPM_MUX("Right PGA Mux", WM8750_PWR1, 4, 0,
 331                 &wm8750_right_pga_controls),
 332         SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
 333                 &wm8750_left_line_controls),
 334         SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
 335                 &wm8750_right_line_controls),
 336
 337         SND_SOC_DAPM_MUX("Out3 Mux", SND_SOC_NOPM, 0, 0, &wm8750_out3_controls),
 338         SND_SOC_DAPM_PGA("Out 3", WM8750_PWR2, 1, 0, NULL, 0),
 339         SND_SOC_DAPM_PGA("Mono Out 1", WM8750_PWR2, 2, 0, NULL, 0),
 340
 341         SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
 342                 &wm8750_diffmux_controls),
 343         SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
 344                 &wm8750_monomux_controls),
 345         SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
 346                 &wm8750_monomux_controls),
 347
 348         SND_SOC_DAPM_OUTPUT("LOUT1"),
 349         SND_SOC_DAPM_OUTPUT("ROUT1"),
 350         SND_SOC_DAPM_OUTPUT("LOUT2"),
 351         SND_SOC_DAPM_OUTPUT("ROUT2"),
 352         SND_SOC_DAPM_OUTPUT("MONO1"),
 353         SND_SOC_DAPM_OUTPUT("OUT3"),
 354         SND_SOC_DAPM_OUTPUT("VREF"),
 355
 356         SND_SOC_DAPM_INPUT("LINPUT1"),
 357         SND_SOC_DAPM_INPUT("LINPUT2"),
 358         SND_SOC_DAPM_INPUT("LINPUT3"),
 359         SND_SOC_DAPM_INPUT("RINPUT1"),
 360         SND_SOC_DAPM_INPUT("RINPUT2"),
 361         SND_SOC_DAPM_INPUT("RINPUT3"),
 362 };
 363
 364 static const struct snd_soc_dapm_route audio_map[] = {
 365         /* left mixer */
 366         {"Left Mixer", "Playback Switch", "Left DAC"},
 367         {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
 368         {"Left Mixer", "Right Playback Switch", "Right DAC"},
 369         {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
 370
 371         /* right mixer */
 372         {"Right Mixer", "Left Playback Switch", "Left DAC"},
 373         {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
 374         {"Right Mixer", "Playback Switch", "Right DAC"},
 375         {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
 376
 377         /* left out 1 */
 378         {"Left Out 1", NULL, "Left Mixer"},
 379         {"LOUT1", NULL, "Left Out 1"},
 380
 381         /* left out 2 */
 382         {"Left Out 2", NULL, "Left Mixer"},
 383         {"LOUT2", NULL, "Left Out 2"},
 384
 385         /* right out 1 */
 386         {"Right Out 1", NULL, "Right Mixer"},
 387         {"ROUT1", NULL, "Right Out 1"},
 388
 389         /* right out 2 */
 390         {"Right Out 2", NULL, "Right Mixer"},
 391         {"ROUT2", NULL, "Right Out 2"},
 392
 393         /* mono mixer */
 394         {"Mono Mixer", "Left Playback Switch", "Left DAC"},
 395         {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
 396         {"Mono Mixer", "Right Playback Switch", "Right DAC"},
 397         {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
 398
 399         /* mono out */
 400         {"Mono Out 1", NULL, "Mono Mixer"},
 401         {"MONO1", NULL, "Mono Out 1"},
 402
 403         /* out 3 */
 404         {"Out3 Mux", "VREF", "VREF"},
 405         {"Out3 Mux", "ROUT1 + Vol", "ROUT1"},
 406         {"Out3 Mux", "ROUT1", "Right Mixer"},
 407         {"Out3 Mux", "MonoOut", "MONO1"},
 408         {"Out 3", NULL, "Out3 Mux"},
 409         {"OUT3", NULL, "Out 3"},
 410
 411         /* Left Line Mux */
 412         {"Left Line Mux", "Line 1", "LINPUT1"},
 413         {"Left Line Mux", "Line 2", "LINPUT2"},
 414         {"Left Line Mux", "Line 3", "LINPUT3"},
 415         {"Left Line Mux", "PGA", "Left PGA Mux"},
 416         {"Left Line Mux", "Differential", "Differential Mux"},
 417
 418         /* Right Line Mux */
 419         {"Right Line Mux", "Line 1", "RINPUT1"},
 420         {"Right Line Mux", "Line 2", "RINPUT2"},
 421         {"Right Line Mux", "Line 3", "RINPUT3"},
 422         {"Right Line Mux", "PGA", "Right PGA Mux"},
 423         {"Right Line Mux", "Differential", "Differential Mux"},
 424
 425         /* Left PGA Mux */
 426         {"Left PGA Mux", "Line 1", "LINPUT1"},
 427         {"Left PGA Mux", "Line 2", "LINPUT2"},
 428         {"Left PGA Mux", "Line 3", "LINPUT3"},
 429         {"Left PGA Mux", "Differential", "Differential Mux"},
 430
 431         /* Right PGA Mux */
 432         {"Right PGA Mux", "Line 1", "RINPUT1"},
 433         {"Right PGA Mux", "Line 2", "RINPUT2"},
 434         {"Right PGA Mux", "Line 3", "RINPUT3"},
 435         {"Right PGA Mux", "Differential", "Differential Mux"},
 436
 437         /* Differential Mux */
 438         {"Differential Mux", "Line 1", "LINPUT1"},
 439         {"Differential Mux", "Line 1", "RINPUT1"},
 440         {"Differential Mux", "Line 2", "LINPUT2"},
 441         {"Differential Mux", "Line 2", "RINPUT2"},
 442
 443         /* Left ADC Mux */
 444         {"Left ADC Mux", "Stereo", "Left PGA Mux"},
 445         {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
 446         {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
 447
 448         /* Right ADC Mux */
 449         {"Right ADC Mux", "Stereo", "Right PGA Mux"},
 450         {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
 451         {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
 452
 453         /* ADC */
 454         {"Left ADC", NULL, "Left ADC Mux"},
 455         {"Right ADC", NULL, "Right ADC Mux"},
 456 };
 457
 458 static int wm8750_add_widgets(struct snd_soc_codec *codec)
 459 {
 460         snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
 461                                   ARRAY_SIZE(wm8750_dapm_widgets));
 462
 463         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 464
 465         snd_soc_dapm_new_widgets(codec);
 466         return 0;
 467 }
 468
 469 struct _coeff_div {
 470         u32 mclk;
 471         u32 rate;
 472         u16 fs;
 473         u8 sr:5;
 474         u8 usb:1;
 475 };
 476
 477 /* codec hifi mclk clock divider coefficients */
 478 static const struct _coeff_div coeff_div[] = {
 479         /* 8k */
 480         {12288000, 8000, 1536, 0x6, 0x0},
 481         {11289600, 8000, 1408, 0x16, 0x0},
 482         {18432000, 8000, 2304, 0x7, 0x0},
 483         {16934400, 8000, 2112, 0x17, 0x0},
 484         {12000000, 8000, 1500, 0x6, 0x1},
 485
 486         /* 11.025k */
 487         {11289600, 11025, 1024, 0x18, 0x0},
 488         {16934400, 11025, 1536, 0x19, 0x0},
 489         {12000000, 11025, 1088, 0x19, 0x1},
 490
 491         /* 16k */
 492         {12288000, 16000, 768, 0xa, 0x0},
 493         {18432000, 16000, 1152, 0xb, 0x0},
 494         {12000000, 16000, 750, 0xa, 0x1},
 495
 496         /* 22.05k */
 497         {11289600, 22050, 512, 0x1a, 0x0},
 498         {16934400, 22050, 768, 0x1b, 0x0},
 499         {12000000, 22050, 544, 0x1b, 0x1},
 500
 501         /* 32k */
 502         {12288000, 32000, 384, 0xc, 0x0},
 503         {18432000, 32000, 576, 0xd, 0x0},
 504         {12000000, 32000, 375, 0xa, 0x1},
 505
 506         /* 44.1k */
 507         {11289600, 44100, 256, 0x10, 0x0},
 508         {16934400, 44100, 384, 0x11, 0x0},
 509         {12000000, 44100, 272, 0x11, 0x1},
 510
 511         /* 48k */
 512         {12288000, 48000, 256, 0x0, 0x0},
 513         {18432000, 48000, 384, 0x1, 0x0},
 514         {12000000, 48000, 250, 0x0, 0x1},
 515
 516         /* 88.2k */
 517         {11289600, 88200, 128, 0x1e, 0x0},
 518         {16934400, 88200, 192, 0x1f, 0x0},
 519         {12000000, 88200, 136, 0x1f, 0x1},
 520
 521         /* 96k */
 522         {12288000, 96000, 128, 0xe, 0x0},
 523         {18432000, 96000, 192, 0xf, 0x0},
 524         {12000000, 96000, 125, 0xe, 0x1},
 525 };
 526
 527 static inline int get_coeff(int mclk, int rate)
 528 {
 529         int i;
 530
 531         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 532                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 533                         return i;
 534         }
 535
 536         printk(KERN_ERR "wm8750: could not get coeff for mclk %d @ rate %d\n",
 537                 mclk, rate);
 538         return -EINVAL;
 539 }
 540
 541 static int wm8750_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 542                 int clk_id, unsigned int freq, int dir)
 543 {
 544         struct snd_soc_codec *codec = codec_dai->codec;
 545         struct wm8750_priv *wm8750 = codec->private_data;
 546
 547         switch (freq) {
 548         case 11289600:
 549         case 12000000:
 550         case 12288000:
 551         case 16934400:
 552         case 18432000:
 553                 wm8750->sysclk = freq;
 554                 return 0;
 555         }
 556         return -EINVAL;
 557 }
 558
 559 static int wm8750_set_dai_fmt(struct snd_soc_dai *codec_dai,
 560                 unsigned int fmt)
 561 {
 562         struct snd_soc_codec *codec = codec_dai->codec;
 563         u16 iface = 0;
 564
 565         /* set master/slave audio interface */
 566         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 567         case SND_SOC_DAIFMT_CBM_CFM:
 568                 iface = 0x0040;
 569                 break;
 570         case SND_SOC_DAIFMT_CBS_CFS:
 571                 break;
 572         default:
 573                 return -EINVAL;
 574         }
 575
 576         /* interface format */
 577         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 578         case SND_SOC_DAIFMT_I2S:
 579                 iface |= 0x0002;
 580                 break;
 581         case SND_SOC_DAIFMT_RIGHT_J:
 582                 break;
 583         case SND_SOC_DAIFMT_LEFT_J:
 584                 iface |= 0x0001;
 585                 break;
 586         case SND_SOC_DAIFMT_DSP_A:
 587                 iface |= 0x0003;
 588                 break;
 589         case SND_SOC_DAIFMT_DSP_B:
 590                 iface |= 0x0013;
 591                 break;
 592         default:
 593                 return -EINVAL;
 594         }
 595
 596         /* clock inversion */
 597         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 598         case SND_SOC_DAIFMT_NB_NF:
 599                 break;
 600         case SND_SOC_DAIFMT_IB_IF:
 601                 iface |= 0x0090;
 602                 break;
 603         case SND_SOC_DAIFMT_IB_NF:
 604                 iface |= 0x0080;
 605                 break;
 606         case SND_SOC_DAIFMT_NB_IF:
 607                 iface |= 0x0010;
 608                 break;
 609         default:
 610                 return -EINVAL;
 611         }
 612
 613         wm8750_write(codec, WM8750_IFACE, iface);
 614         return 0;
 615 }
 616
 617 static int wm8750_pcm_hw_params(struct snd_pcm_substream *substream,
 618         struct snd_pcm_hw_params *params)
 619 {
 620         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 621         struct snd_soc_device *socdev = rtd->socdev;
 622         struct snd_soc_codec *codec = socdev->codec;
 623         struct wm8750_priv *wm8750 = codec->private_data;
 624         u16 iface = wm8750_read_reg_cache(codec, WM8750_IFACE) & 0x1f3;
 625         u16 srate = wm8750_read_reg_cache(codec, WM8750_SRATE) & 0x1c0;
 626         int coeff = get_coeff(wm8750->sysclk, params_rate(params));
 627
 628         /* bit size */
 629         switch (params_format(params)) {
 630         case SNDRV_PCM_FORMAT_S16_LE:
 631                 break;
 632         case SNDRV_PCM_FORMAT_S20_3LE:
 633                 iface |= 0x0004;
 634                 break;
 635         case SNDRV_PCM_FORMAT_S24_LE:
 636                 iface |= 0x0008;
 637                 break;
 638         case SNDRV_PCM_FORMAT_S32_LE:
 639                 iface |= 0x000c;
 640                 break;
 641         }
 642
 643         /* set iface & srate */
 644         wm8750_write(codec, WM8750_IFACE, iface);
 645         if (coeff >= 0)
 646                 wm8750_write(codec, WM8750_SRATE, srate |
 647                         (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
 648
 649         return 0;
 650 }
 651
 652 static int wm8750_mute(struct snd_soc_dai *dai, int mute)
 653 {
 654         struct snd_soc_codec *codec = dai->codec;
 655         u16 mute_reg = wm8750_read_reg_cache(codec, WM8750_ADCDAC) & 0xfff7;
 656
 657         if (mute)
 658                 wm8750_write(codec, WM8750_ADCDAC, mute_reg | 0x8);
 659         else
 660                 wm8750_write(codec, WM8750_ADCDAC, mute_reg);
 661         return 0;
 662 }
 663
 664 static int wm8750_set_bias_level(struct snd_soc_codec *codec,
 665                                  enum snd_soc_bias_level level)
 666 {
 667         u16 pwr_reg = wm8750_read_reg_cache(codec, WM8750_PWR1) & 0xfe3e;
 668
 669         switch (level) {
 670         case SND_SOC_BIAS_ON:
 671                 /* set vmid to 50k and unmute dac */
 672                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x00c0);
 673                 break;
 674         case SND_SOC_BIAS_PREPARE:
 675                 /* set vmid to 5k for quick power up */
 676                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
 677                 break;
 678         case SND_SOC_BIAS_STANDBY:
 679                 /* mute dac and set vmid to 500k, enable VREF */
 680                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x0141);
 681                 break;
 682         case SND_SOC_BIAS_OFF:
 683                 wm8750_write(codec, WM8750_PWR1, 0x0001);
 684                 break;
 685         }
 686         codec->bias_level = level;
 687         return 0;
 688 }
 689
 690 #define WM8750_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 691         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 692         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 693
 694 #define WM8750_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 695         SNDRV_PCM_FMTBIT_S24_LE)
 696
 697 struct snd_soc_dai wm8750_dai = {
 698         .name = "WM8750",
 699         .playback = {
 700                 .stream_name = "Playback",
 701                 .channels_min = 1,
 702                 .channels_max = 2,
 703                 .rates = WM8750_RATES,
 704                 .formats = WM8750_FORMATS,},
 705         .capture = {
 706                 .stream_name = "Capture",
 707                 .channels_min = 1,
 708                 .channels_max = 2,
 709                 .rates = WM8750_RATES,
 710                 .formats = WM8750_FORMATS,},
 711         .ops = {
 712                 .hw_params = wm8750_pcm_hw_params,
 713         },
 714         .dai_ops = {
 715                 .digital_mute = wm8750_mute,
 716                 .set_fmt = wm8750_set_dai_fmt,
 717                 .set_sysclk = wm8750_set_dai_sysclk,
 718         },
 719 };
 720 EXPORT_SYMBOL_GPL(wm8750_dai);
 721
 722 static void wm8750_work(struct work_struct *work)
 723 {
 724         struct snd_soc_codec *codec =
 725                 container_of(work, struct snd_soc_codec, delayed_work.work);
 726         wm8750_set_bias_level(codec, codec->bias_level);
 727 }
 728
 729 static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
 730 {
 731         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 732         struct snd_soc_codec *codec = socdev->codec;
 733
 734         wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
 735         return 0;
 736 }
 737
 738 static int wm8750_resume(struct platform_device *pdev)
 739 {
 740         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 741         struct snd_soc_codec *codec = socdev->codec;
 742         int i;
 743         u8 data[2];
 744         u16 *cache = codec->reg_cache;
 745
 746         /* Sync reg_cache with the hardware */
 747         for (i = 0; i < ARRAY_SIZE(wm8750_reg); i++) {
 748                 if (i == WM8750_RESET)
 749                         continue;
 750                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 751                 data[1] = cache[i] & 0x00ff;
 752                 codec->hw_write(codec->control_data, data, 2);
 753         }
 754
 755         wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 756
 757         /* charge wm8750 caps */
 758         if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
 759                 wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 760                 codec->bias_level = SND_SOC_BIAS_ON;
 761                 schedule_delayed_work(&codec->delayed_work,
 762                                         msecs_to_jiffies(1000));
 763         }
 764
 765         return 0;
 766 }
 767
 768 /*
 769  * initialise the WM8750 driver
 770  * register the mixer and dsp interfaces with the kernel
 771  */
 772 static int wm8750_init(struct snd_soc_device *socdev)
 773 {
 774         struct snd_soc_codec *codec = socdev->codec;
 775         int reg, ret = 0;
 776
 777         codec->name = "WM8750";
 778         codec->owner = THIS_MODULE;
 779         codec->read = wm8750_read_reg_cache;
 780         codec->write = wm8750_write;
 781         codec->set_bias_level = wm8750_set_bias_level;
 782         codec->dai = &wm8750_dai;
 783         codec->num_dai = 1;
 784         codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
 785         codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
 786         if (codec->reg_cache == NULL)
 787                 return -ENOMEM;
 788
 789         wm8750_reset(codec);
 790
 791         /* register pcms */
 792         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 793         if (ret < 0) {
 794                 printk(KERN_ERR "wm8750: failed to create pcms\n");
 795                 goto pcm_err;
 796         }
 797
 798         /* charge output caps */
 799         wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 800         codec->bias_level = SND_SOC_BIAS_STANDBY;
 801         schedule_delayed_work(&codec->delayed_work, msecs_to_jiffies(1000));
 802
 803         /* set the update bits */
 804         reg = wm8750_read_reg_cache(codec, WM8750_LDAC);
 805         wm8750_write(codec, WM8750_LDAC, reg | 0x0100);
 806         reg = wm8750_read_reg_cache(codec, WM8750_RDAC);
 807         wm8750_write(codec, WM8750_RDAC, reg | 0x0100);
 808         reg = wm8750_read_reg_cache(codec, WM8750_LOUT1V);
 809         wm8750_write(codec, WM8750_LOUT1V, reg | 0x0100);
 810         reg = wm8750_read_reg_cache(codec, WM8750_ROUT1V);
 811         wm8750_write(codec, WM8750_ROUT1V, reg | 0x0100);
 812         reg = wm8750_read_reg_cache(codec, WM8750_LOUT2V);
 813         wm8750_write(codec, WM8750_LOUT2V, reg | 0x0100);
 814         reg = wm8750_read_reg_cache(codec, WM8750_ROUT2V);
 815         wm8750_write(codec, WM8750_ROUT2V, reg | 0x0100);
 816         reg = wm8750_read_reg_cache(codec, WM8750_LINVOL);
 817         wm8750_write(codec, WM8750_LINVOL, reg | 0x0100);
 818         reg = wm8750_read_reg_cache(codec, WM8750_RINVOL);
 819         wm8750_write(codec, WM8750_RINVOL, reg | 0x0100);
 820
 821         wm8750_add_controls(codec);
 822         wm8750_add_widgets(codec);
 823         ret = snd_soc_register_card(socdev);
 824         if (ret < 0) {
 825                 printk(KERN_ERR "wm8750: failed to register card\n");
 826                 goto card_err;
 827         }
 828         return ret;
 829
 830 card_err:
 831         snd_soc_free_pcms(socdev);
 832         snd_soc_dapm_free(socdev);
 833 pcm_err:
 834         kfree(codec->reg_cache);
 835         return ret;
 836 }
 837
 838 /* If the i2c layer weren't so broken, we could pass this kind of data
 839    around */
 840 static struct snd_soc_device *wm8750_socdev;
 841
 842 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 843
 844 /*
 845  * WM8750 2 wire address is determined by GPIO5
 846  * state during powerup.
 847  *    low  = 0x1a
 848  *    high = 0x1b
 849  */
 850
 851 static int wm8750_i2c_probe(struct i2c_client *i2c,
 852                             const struct i2c_device_id *id)
 853 {
 854         struct snd_soc_device *socdev = wm8750_socdev;
 855         struct snd_soc_codec *codec = socdev->codec;
 856         int ret;
 857
 858         i2c_set_clientdata(i2c, codec);
 859         codec->control_data = i2c;
 860
 861         ret = wm8750_init(socdev);
 862         if (ret < 0)
 863                 pr_err("failed to initialise WM8750\n");
 864
 865         return ret;
 866 }
 867
 868 static int wm8750_i2c_remove(struct i2c_client *client)
 869 {
 870         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 871         kfree(codec->reg_cache);
 872         return 0;
 873 }
 874
 875 static const struct i2c_device_id wm8750_i2c_id[] = {
 876         { "wm8750", 0 },
 877         { }
 878 };
 879 MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
 880
 881 static struct i2c_driver wm8750_i2c_driver = {
 882         .driver = {
 883                 .name = "WM8750 I2C Codec",
 884                 .owner = THIS_MODULE,
 885         },
 886         .probe =    wm8750_i2c_probe,
 887         .remove =   wm8750_i2c_remove,
 888         .id_table = wm8750_i2c_id,
 889 };
 890
 891 static int wm8750_add_i2c_device(struct platform_device *pdev,
 892                                  const struct wm8750_setup_data *setup)
 893 {
 894         struct i2c_board_info info;
 895         struct i2c_adapter *adapter;
 896         struct i2c_client *client;
 897         int ret;
 898
 899         ret = i2c_add_driver(&wm8750_i2c_driver);
 900         if (ret != 0) {
 901                 dev_err(&pdev->dev, "can't add i2c driver\n");
 902                 return ret;
 903         }
 904
 905         memset(&info, 0, sizeof(struct i2c_board_info));
 906         info.addr = setup->i2c_address;
 907         strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
 908
 909         adapter = i2c_get_adapter(setup->i2c_bus);
 910         if (!adapter) {
 911                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 912                         setup->i2c_bus);
 913                 goto err_driver;
 914         }
 915
 916         client = i2c_new_device(adapter, &info);
 917         i2c_put_adapter(adapter);
 918         if (!client) {
 919                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 920                         (unsigned int)info.addr);
 921                 goto err_driver;
 922         }
 923
 924         return 0;
 925
 926 err_driver:
 927         i2c_del_driver(&wm8750_i2c_driver);
 928         return -ENODEV;
 929 }
 930 #endif
 931
 932 #if defined(CONFIG_SPI_MASTER)
 933 static int __devinit wm8750_spi_probe(struct spi_device *spi)
 934 {
 935         struct snd_soc_device *socdev = wm8750_socdev;
 936         struct snd_soc_codec *codec = socdev->codec;
 937         int ret;
 938
 939         codec->control_data = spi;
 940
 941         ret = wm8750_init(socdev);
 942         if (ret < 0)
 943                 dev_err(&spi->dev, "failed to initialise WM8750\n");
 944
 945         return ret;
 946 }
 947
 948 static int __devexit wm8750_spi_remove(struct spi_device *spi)
 949 {
 950         return 0;
 951 }
 952
 953 static struct spi_driver wm8750_spi_driver = {
 954         .driver = {
 955                 .name   = "wm8750",
 956                 .bus    = &spi_bus_type,
 957                 .owner  = THIS_MODULE,
 958         },
 959         .probe          = wm8750_spi_probe,
 960         .remove         = __devexit_p(wm8750_spi_remove),
 961 };
 962
 963 static int wm8750_spi_write(struct spi_device *spi, const char *data, int len)
 964 {
 965         struct spi_transfer t;
 966         struct spi_message m;
 967         u8 msg[2];
 968
 969         if (len <= 0)
 970                 return 0;
 971
 972         msg[0] = data[0];
 973         msg[1] = data[1];
 974
 975         spi_message_init(&m);
 976         memset(&t, 0, (sizeof t));
 977
 978         t.tx_buf = &msg[0];
 979         t.len = len;
 980
 981         spi_message_add_tail(&t, &m);
 982         spi_sync(spi, &m);
 983
 984         return len;
 985 }
 986 #endif
 987
 988 static int wm8750_probe(struct platform_device *pdev)
 989 {
 990         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 991         struct wm8750_setup_data *setup = socdev->codec_data;
 992         struct snd_soc_codec *codec;
 993         struct wm8750_priv *wm8750;
 994         int ret;
 995
 996         pr_info("WM8750 Audio Codec %s", WM8750_VERSION);
 997         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 998         if (codec == NULL)
 999                 return -ENOMEM;
1000
1001         wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
1002         if (wm8750 == NULL) {
1003                 kfree(codec);
1004                 return -ENOMEM;
1005         }
1006
1007         codec->private_data = wm8750;
1008         socdev->codec = codec;
1009         mutex_init(&codec->mutex);
1010         INIT_LIST_HEAD(&codec->dapm_widgets);
1011         INIT_LIST_HEAD(&codec->dapm_paths);
1012         wm8750_socdev = socdev;
1013         INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
1014
1015         ret = -ENODEV;
1016
1017 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1018         if (setup->i2c_address) {
1019                 codec->hw_write = (hw_write_t)i2c_master_send;
1020                 ret = wm8750_add_i2c_device(pdev, setup);
1021         }
1022 #endif
1023 #if defined(CONFIG_SPI_MASTER)
1024         if (setup->spi) {
1025                 codec->hw_write = (hw_write_t)wm8750_spi_write;
1026                 ret = spi_register_driver(&wm8750_spi_driver);
1027                 if (ret != 0)
1028                         printk(KERN_ERR "can't add spi driver");
1029         }
1030 #endif
1031
1032         if (ret != 0) {
1033                 kfree(codec->private_data);
1034                 kfree(codec);
1035         }
1036         return ret;
1037 }
1038
1039 /*
1040  * This function forces any delayed work to be queued and run.
1041  */
1042 static int run_delayed_work(struct delayed_work *dwork)
1043 {
1044         int ret;
1045
1046         /* cancel any work waiting to be queued. */
1047         ret = cancel_delayed_work(dwork);
1048
1049         /* if there was any work waiting then we run it now and
1050          * wait for it's completion */
1051         if (ret) {
1052                 schedule_delayed_work(dwork, 0);
1053                 flush_scheduled_work();
1054         }
1055         return ret;
1056 }
1057
1058 /* power down chip */
1059 static int wm8750_remove(struct platform_device *pdev)
1060 {
1061         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1062         struct snd_soc_codec *codec = socdev->codec;
1063
1064         if (codec->control_data)
1065                 wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
1066         run_delayed_work(&codec->delayed_work);
1067         snd_soc_free_pcms(socdev);
1068         snd_soc_dapm_free(socdev);
1069 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1070         i2c_unregister_device(codec->control_data);
1071         i2c_del_driver(&wm8750_i2c_driver);
1072 #endif
1073 #if defined(CONFIG_SPI_MASTER)
1074         spi_unregister_driver(&wm8750_spi_driver);
1075 #endif
1076         kfree(codec->private_data);
1077         kfree(codec);
1078
1079         return 0;
1080 }
1081
1082 struct snd_soc_codec_device soc_codec_dev_wm8750 = {
1083         .probe =        wm8750_probe,
1084         .remove =       wm8750_remove,
1085         .suspend =      wm8750_suspend,
1086         .resume =       wm8750_resume,
1087 };
1088 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
1089
1090 MODULE_DESCRIPTION("ASoC WM8750 driver");
1091 MODULE_AUTHOR("Liam Girdwood");
1092 MODULE_LICENSE("GPL");