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 WM8750_VERSION "0.12"
  33
  34 /* codec private data */
  35 struct wm8750_priv {
  36         unsigned int sysclk;
  37 };
  38
  39 /*
  40  * wm8750 register cache
  41  * We can't read the WM8750 register space when we
  42  * are using 2 wire for device control, so we cache them instead.
  43  */
  44 static const u16 wm8750_reg[] = {
  45         0x0097, 0x0097, 0x0079, 0x0079,  /*  0 */
  46         0x0000, 0x0008, 0x0000, 0x000a,  /*  4 */
  47         0x0000, 0x0000, 0x00ff, 0x00ff,  /*  8 */
  48         0x000f, 0x000f, 0x0000, 0x0000,  /* 12 */
  49         0x0000, 0x007b, 0x0000, 0x0032,  /* 16 */
  50         0x0000, 0x00c3, 0x00c3, 0x00c0,  /* 20 */
  51         0x0000, 0x0000, 0x0000, 0x0000,  /* 24 */
  52         0x0000, 0x0000, 0x0000, 0x0000,  /* 28 */
  53         0x0000, 0x0000, 0x0050, 0x0050,  /* 32 */
  54         0x0050, 0x0050, 0x0050, 0x0050,  /* 36 */
  55         0x0079, 0x0079, 0x0079,          /* 40 */
  56 };
  57
  58 /*
  59  * read wm8750 register cache
  60  */
  61 static inline unsigned int wm8750_read_reg_cache(struct snd_soc_codec *codec,
  62         unsigned int reg)
  63 {
  64         u16 *cache = codec->reg_cache;
  65         if (reg > WM8750_CACHE_REGNUM)
  66                 return -1;
  67         return cache[reg];
  68 }
  69
  70 /*
  71  * write wm8750 register cache
  72  */
  73 static inline void wm8750_write_reg_cache(struct snd_soc_codec *codec,
  74         unsigned int reg, unsigned int value)
  75 {
  76         u16 *cache = codec->reg_cache;
  77         if (reg > WM8750_CACHE_REGNUM)
  78                 return;
  79         cache[reg] = value;
  80 }
  81
  82 static int wm8750_write(struct snd_soc_codec *codec, unsigned int reg,
  83         unsigned int value)
  84 {
  85         u8 data[2];
  86
  87         /* data is
  88          *   D15..D9 WM8753 register offset
  89          *   D8...D0 register data
  90          */
  91         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
  92         data[1] = value & 0x00ff;
  93
  94         wm8750_write_reg_cache(codec, reg, value);
  95         if (codec->hw_write(codec->control_data, data, 2) == 2)
  96                 return 0;
  97         else
  98                 return -EIO;
  99 }
 100
 101 #define wm8750_reset(c) wm8750_write(c, WM8750_RESET, 0)
 102
 103 /*
 104  * WM8750 Controls
 105  */
 106 static const char *wm8750_bass[] = {"Linear Control", "Adaptive Boost"};
 107 static const char *wm8750_bass_filter[] = { "130Hz @ 48kHz", "200Hz @ 48kHz" };
 108 static const char *wm8750_treble[] = {"8kHz", "4kHz"};
 109 static const char *wm8750_3d_lc[] = {"200Hz", "500Hz"};
 110 static const char *wm8750_3d_uc[] = {"2.2kHz", "1.5kHz"};
 111 static const char *wm8750_3d_func[] = {"Capture", "Playback"};
 112 static const char *wm8750_alc_func[] = {"Off", "Right", "Left", "Stereo"};
 113 static const char *wm8750_ng_type[] = {"Constant PGA Gain",
 114         "Mute ADC Output"};
 115 static const char *wm8750_line_mux[] = {"Line 1", "Line 2", "Line 3", "PGA",
 116         "Differential"};
 117 static const char *wm8750_pga_sel[] = {"Line 1", "Line 2", "Line 3",
 118         "Differential"};
 119 static const char *wm8750_out3[] = {"VREF", "ROUT1 + Vol", "MonoOut",
 120         "ROUT1"};
 121 static const char *wm8750_diff_sel[] = {"Line 1", "Line 2"};
 122 static const char *wm8750_adcpol[] = {"Normal", "L Invert", "R Invert",
 123         "L + R Invert"};
 124 static const char *wm8750_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 125 static const char *wm8750_mono_mux[] = {"Stereo", "Mono (Left)",
 126         "Mono (Right)", "Digital Mono"};
 127
 128 static const struct soc_enum wm8750_enum[] = {
 129 SOC_ENUM_SINGLE(WM8750_BASS, 7, 2, wm8750_bass),
 130 SOC_ENUM_SINGLE(WM8750_BASS, 6, 2, wm8750_bass_filter),
 131 SOC_ENUM_SINGLE(WM8750_TREBLE, 6, 2, wm8750_treble),
 132 SOC_ENUM_SINGLE(WM8750_3D, 5, 2, wm8750_3d_lc),
 133 SOC_ENUM_SINGLE(WM8750_3D, 6, 2, wm8750_3d_uc),
 134 SOC_ENUM_SINGLE(WM8750_3D, 7, 2, wm8750_3d_func),
 135 SOC_ENUM_SINGLE(WM8750_ALC1, 7, 4, wm8750_alc_func),
 136 SOC_ENUM_SINGLE(WM8750_NGATE, 1, 2, wm8750_ng_type),
 137 SOC_ENUM_SINGLE(WM8750_LOUTM1, 0, 5, wm8750_line_mux),
 138 SOC_ENUM_SINGLE(WM8750_ROUTM1, 0, 5, wm8750_line_mux),
 139 SOC_ENUM_SINGLE(WM8750_LADCIN, 6, 4, wm8750_pga_sel), /* 10 */
 140 SOC_ENUM_SINGLE(WM8750_RADCIN, 6, 4, wm8750_pga_sel),
 141 SOC_ENUM_SINGLE(WM8750_ADCTL2, 7, 4, wm8750_out3),
 142 SOC_ENUM_SINGLE(WM8750_ADCIN, 8, 2, wm8750_diff_sel),
 143 SOC_ENUM_SINGLE(WM8750_ADCDAC, 5, 4, wm8750_adcpol),
 144 SOC_ENUM_SINGLE(WM8750_ADCDAC, 1, 4, wm8750_deemph),
 145 SOC_ENUM_SINGLE(WM8750_ADCIN, 6, 4, wm8750_mono_mux), /* 16 */
 146
 147 };
 148
 149 static const struct snd_kcontrol_new wm8750_snd_controls[] = {
 150
 151 SOC_DOUBLE_R("Capture Volume", WM8750_LINVOL, WM8750_RINVOL, 0, 63, 0),
 152 SOC_DOUBLE_R("Capture ZC Switch", WM8750_LINVOL, WM8750_RINVOL, 6, 1, 0),
 153 SOC_DOUBLE_R("Capture Switch", WM8750_LINVOL, WM8750_RINVOL, 7, 1, 1),
 154
 155 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8750_LOUT1V,
 156         WM8750_ROUT1V, 7, 1, 0),
 157 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8750_LOUT2V,
 158         WM8750_ROUT2V, 7, 1, 0),
 159
 160 SOC_ENUM("Playback De-emphasis", wm8750_enum[15]),
 161
 162 SOC_ENUM("Capture Polarity", wm8750_enum[14]),
 163 SOC_SINGLE("Playback 6dB Attenuate", WM8750_ADCDAC, 7, 1, 0),
 164 SOC_SINGLE("Capture 6dB Attenuate", WM8750_ADCDAC, 8, 1, 0),
 165
 166 SOC_DOUBLE_R("PCM Volume", WM8750_LDAC, WM8750_RDAC, 0, 255, 0),
 167
 168 SOC_ENUM("Bass Boost", wm8750_enum[0]),
 169 SOC_ENUM("Bass Filter", wm8750_enum[1]),
 170 SOC_SINGLE("Bass Volume", WM8750_BASS, 0, 15, 1),
 171
 172 SOC_SINGLE("Treble Volume", WM8750_TREBLE, 0, 15, 1),
 173 SOC_ENUM("Treble Cut-off", wm8750_enum[2]),
 174
 175 SOC_SINGLE("3D Switch", WM8750_3D, 0, 1, 0),
 176 SOC_SINGLE("3D Volume", WM8750_3D, 1, 15, 0),
 177 SOC_ENUM("3D Lower Cut-off", wm8750_enum[3]),
 178 SOC_ENUM("3D Upper Cut-off", wm8750_enum[4]),
 179 SOC_ENUM("3D Mode", wm8750_enum[5]),
 180
 181 SOC_SINGLE("ALC Capture Target Volume", WM8750_ALC1, 0, 7, 0),
 182 SOC_SINGLE("ALC Capture Max Volume", WM8750_ALC1, 4, 7, 0),
 183 SOC_ENUM("ALC Capture Function", wm8750_enum[6]),
 184 SOC_SINGLE("ALC Capture ZC Switch", WM8750_ALC2, 7, 1, 0),
 185 SOC_SINGLE("ALC Capture Hold Time", WM8750_ALC2, 0, 15, 0),
 186 SOC_SINGLE("ALC Capture Decay Time", WM8750_ALC3, 4, 15, 0),
 187 SOC_SINGLE("ALC Capture Attack Time", WM8750_ALC3, 0, 15, 0),
 188 SOC_SINGLE("ALC Capture NG Threshold", WM8750_NGATE, 3, 31, 0),
 189 SOC_ENUM("ALC Capture NG Type", wm8750_enum[4]),
 190 SOC_SINGLE("ALC Capture NG Switch", WM8750_NGATE, 0, 1, 0),
 191
 192 SOC_SINGLE("Left ADC Capture Volume", WM8750_LADC, 0, 255, 0),
 193 SOC_SINGLE("Right ADC Capture Volume", WM8750_RADC, 0, 255, 0),
 194
 195 SOC_SINGLE("ZC Timeout Switch", WM8750_ADCTL1, 0, 1, 0),
 196 SOC_SINGLE("Playback Invert Switch", WM8750_ADCTL1, 1, 1, 0),
 197
 198 SOC_SINGLE("Right Speaker Playback Invert Switch", WM8750_ADCTL2, 4, 1, 0),
 199
 200 /* Unimplemented */
 201 /* ADCDAC Bit 0 - ADCHPD */
 202 /* ADCDAC Bit 4 - HPOR */
 203 /* ADCTL1 Bit 2,3 - DATSEL */
 204 /* ADCTL1 Bit 4,5 - DMONOMIX */
 205 /* ADCTL1 Bit 6,7 - VSEL */
 206 /* ADCTL2 Bit 2 - LRCM */
 207 /* ADCTL2 Bit 3 - TRI */
 208 /* ADCTL3 Bit 5 - HPFLREN */
 209 /* ADCTL3 Bit 6 - VROI */
 210 /* ADCTL3 Bit 7,8 - ADCLRM */
 211 /* ADCIN Bit 4 - LDCM */
 212 /* ADCIN Bit 5 - RDCM */
 213
 214 SOC_DOUBLE_R("Mic Boost", WM8750_LADCIN, WM8750_RADCIN, 4, 3, 0),
 215
 216 SOC_DOUBLE_R("Bypass Left Playback Volume", WM8750_LOUTM1,
 217         WM8750_LOUTM2, 4, 7, 1),
 218 SOC_DOUBLE_R("Bypass Right Playback Volume", WM8750_ROUTM1,
 219         WM8750_ROUTM2, 4, 7, 1),
 220 SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8750_MOUTM1,
 221         WM8750_MOUTM2, 4, 7, 1),
 222
 223 SOC_SINGLE("Mono Playback ZC Switch", WM8750_MOUTV, 7, 1, 0),
 224
 225 SOC_DOUBLE_R("Headphone Playback Volume", WM8750_LOUT1V, WM8750_ROUT1V,
 226         0, 127, 0),
 227 SOC_DOUBLE_R("Speaker Playback Volume", WM8750_LOUT2V, WM8750_ROUT2V,
 228         0, 127, 0),
 229
 230 SOC_SINGLE("Mono Playback Volume", WM8750_MOUTV, 0, 127, 0),
 231
 232 };
 233
 234 /*
 235  * DAPM Controls
 236  */
 237
 238 /* Left Mixer */
 239 static const struct snd_kcontrol_new wm8750_left_mixer_controls[] = {
 240 SOC_DAPM_SINGLE("Playback Switch", WM8750_LOUTM1, 8, 1, 0),
 241 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_LOUTM1, 7, 1, 0),
 242 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_LOUTM2, 8, 1, 0),
 243 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_LOUTM2, 7, 1, 0),
 244 };
 245
 246 /* Right Mixer */
 247 static const struct snd_kcontrol_new wm8750_right_mixer_controls[] = {
 248 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_ROUTM1, 8, 1, 0),
 249 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_ROUTM1, 7, 1, 0),
 250 SOC_DAPM_SINGLE("Playback Switch", WM8750_ROUTM2, 8, 1, 0),
 251 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_ROUTM2, 7, 1, 0),
 252 };
 253
 254 /* Mono Mixer */
 255 static const struct snd_kcontrol_new wm8750_mono_mixer_controls[] = {
 256 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_MOUTM1, 8, 1, 0),
 257 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_MOUTM1, 7, 1, 0),
 258 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_MOUTM2, 8, 1, 0),
 259 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_MOUTM2, 7, 1, 0),
 260 };
 261
 262 /* Left Line Mux */
 263 static const struct snd_kcontrol_new wm8750_left_line_controls =
 264 SOC_DAPM_ENUM("Route", wm8750_enum[8]);
 265
 266 /* Right Line Mux */
 267 static const struct snd_kcontrol_new wm8750_right_line_controls =
 268 SOC_DAPM_ENUM("Route", wm8750_enum[9]);
 269
 270 /* Left PGA Mux */
 271 static const struct snd_kcontrol_new wm8750_left_pga_controls =
 272 SOC_DAPM_ENUM("Route", wm8750_enum[10]);
 273
 274 /* Right PGA Mux */
 275 static const struct snd_kcontrol_new wm8750_right_pga_controls =
 276 SOC_DAPM_ENUM("Route", wm8750_enum[11]);
 277
 278 /* Out 3 Mux */
 279 static const struct snd_kcontrol_new wm8750_out3_controls =
 280 SOC_DAPM_ENUM("Route", wm8750_enum[12]);
 281
 282 /* Differential Mux */
 283 static const struct snd_kcontrol_new wm8750_diffmux_controls =
 284 SOC_DAPM_ENUM("Route", wm8750_enum[13]);
 285
 286 /* Mono ADC Mux */
 287 static const struct snd_kcontrol_new wm8750_monomux_controls =
 288 SOC_DAPM_ENUM("Route", wm8750_enum[16]);
 289
 290 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 291         SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
 292                 &wm8750_left_mixer_controls[0],
 293                 ARRAY_SIZE(wm8750_left_mixer_controls)),
 294         SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
 295                 &wm8750_right_mixer_controls[0],
 296                 ARRAY_SIZE(wm8750_right_mixer_controls)),
 297         SND_SOC_DAPM_MIXER("Mono Mixer", WM8750_PWR2, 2, 0,
 298                 &wm8750_mono_mixer_controls[0],
 299                 ARRAY_SIZE(wm8750_mono_mixer_controls)),
 300
 301         SND_SOC_DAPM_PGA("Right Out 2", WM8750_PWR2, 3, 0, NULL, 0),
 302         SND_SOC_DAPM_PGA("Left Out 2", WM8750_PWR2, 4, 0, NULL, 0),
 303         SND_SOC_DAPM_PGA("Right Out 1", WM8750_PWR2, 5, 0, NULL, 0),
 304         SND_SOC_DAPM_PGA("Left Out 1", WM8750_PWR2, 6, 0, NULL, 0),
 305         SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8750_PWR2, 7, 0),
 306         SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8750_PWR2, 8, 0),
 307
 308         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8750_PWR1, 1, 0),
 309         SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8750_PWR1, 2, 0),
 310         SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8750_PWR1, 3, 0),
 311
 312         SND_SOC_DAPM_MUX("Left PGA Mux", WM8750_PWR1, 5, 0,
 313                 &wm8750_left_pga_controls),
 314         SND_SOC_DAPM_MUX("Right PGA Mux", WM8750_PWR1, 4, 0,
 315                 &wm8750_right_pga_controls),
 316         SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
 317                 &wm8750_left_line_controls),
 318         SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
 319                 &wm8750_right_line_controls),
 320
 321         SND_SOC_DAPM_MUX("Out3 Mux", SND_SOC_NOPM, 0, 0, &wm8750_out3_controls),
 322         SND_SOC_DAPM_PGA("Out 3", WM8750_PWR2, 1, 0, NULL, 0),
 323         SND_SOC_DAPM_PGA("Mono Out 1", WM8750_PWR2, 2, 0, NULL, 0),
 324
 325         SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
 326                 &wm8750_diffmux_controls),
 327         SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
 328                 &wm8750_monomux_controls),
 329         SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
 330                 &wm8750_monomux_controls),
 331
 332         SND_SOC_DAPM_OUTPUT("LOUT1"),
 333         SND_SOC_DAPM_OUTPUT("ROUT1"),
 334         SND_SOC_DAPM_OUTPUT("LOUT2"),
 335         SND_SOC_DAPM_OUTPUT("ROUT2"),
 336         SND_SOC_DAPM_OUTPUT("MONO1"),
 337         SND_SOC_DAPM_OUTPUT("OUT3"),
 338         SND_SOC_DAPM_OUTPUT("VREF"),
 339
 340         SND_SOC_DAPM_INPUT("LINPUT1"),
 341         SND_SOC_DAPM_INPUT("LINPUT2"),
 342         SND_SOC_DAPM_INPUT("LINPUT3"),
 343         SND_SOC_DAPM_INPUT("RINPUT1"),
 344         SND_SOC_DAPM_INPUT("RINPUT2"),
 345         SND_SOC_DAPM_INPUT("RINPUT3"),
 346 };
 347
 348 static const struct snd_soc_dapm_route audio_map[] = {
 349         /* left mixer */
 350         {"Left Mixer", "Playback Switch", "Left DAC"},
 351         {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
 352         {"Left Mixer", "Right Playback Switch", "Right DAC"},
 353         {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
 354
 355         /* right mixer */
 356         {"Right Mixer", "Left Playback Switch", "Left DAC"},
 357         {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
 358         {"Right Mixer", "Playback Switch", "Right DAC"},
 359         {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
 360
 361         /* left out 1 */
 362         {"Left Out 1", NULL, "Left Mixer"},
 363         {"LOUT1", NULL, "Left Out 1"},
 364
 365         /* left out 2 */
 366         {"Left Out 2", NULL, "Left Mixer"},
 367         {"LOUT2", NULL, "Left Out 2"},
 368
 369         /* right out 1 */
 370         {"Right Out 1", NULL, "Right Mixer"},
 371         {"ROUT1", NULL, "Right Out 1"},
 372
 373         /* right out 2 */
 374         {"Right Out 2", NULL, "Right Mixer"},
 375         {"ROUT2", NULL, "Right Out 2"},
 376
 377         /* mono mixer */
 378         {"Mono Mixer", "Left Playback Switch", "Left DAC"},
 379         {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
 380         {"Mono Mixer", "Right Playback Switch", "Right DAC"},
 381         {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
 382
 383         /* mono out */
 384         {"Mono Out 1", NULL, "Mono Mixer"},
 385         {"MONO1", NULL, "Mono Out 1"},
 386
 387         /* out 3 */
 388         {"Out3 Mux", "VREF", "VREF"},
 389         {"Out3 Mux", "ROUT1 + Vol", "ROUT1"},
 390         {"Out3 Mux", "ROUT1", "Right Mixer"},
 391         {"Out3 Mux", "MonoOut", "MONO1"},
 392         {"Out 3", NULL, "Out3 Mux"},
 393         {"OUT3", NULL, "Out 3"},
 394
 395         /* Left Line Mux */
 396         {"Left Line Mux", "Line 1", "LINPUT1"},
 397         {"Left Line Mux", "Line 2", "LINPUT2"},
 398         {"Left Line Mux", "Line 3", "LINPUT3"},
 399         {"Left Line Mux", "PGA", "Left PGA Mux"},
 400         {"Left Line Mux", "Differential", "Differential Mux"},
 401
 402         /* Right Line Mux */
 403         {"Right Line Mux", "Line 1", "RINPUT1"},
 404         {"Right Line Mux", "Line 2", "RINPUT2"},
 405         {"Right Line Mux", "Line 3", "RINPUT3"},
 406         {"Right Line Mux", "PGA", "Right PGA Mux"},
 407         {"Right Line Mux", "Differential", "Differential Mux"},
 408
 409         /* Left PGA Mux */
 410         {"Left PGA Mux", "Line 1", "LINPUT1"},
 411         {"Left PGA Mux", "Line 2", "LINPUT2"},
 412         {"Left PGA Mux", "Line 3", "LINPUT3"},
 413         {"Left PGA Mux", "Differential", "Differential Mux"},
 414
 415         /* Right PGA Mux */
 416         {"Right PGA Mux", "Line 1", "RINPUT1"},
 417         {"Right PGA Mux", "Line 2", "RINPUT2"},
 418         {"Right PGA Mux", "Line 3", "RINPUT3"},
 419         {"Right PGA Mux", "Differential", "Differential Mux"},
 420
 421         /* Differential Mux */
 422         {"Differential Mux", "Line 1", "LINPUT1"},
 423         {"Differential Mux", "Line 1", "RINPUT1"},
 424         {"Differential Mux", "Line 2", "LINPUT2"},
 425         {"Differential Mux", "Line 2", "RINPUT2"},
 426
 427         /* Left ADC Mux */
 428         {"Left ADC Mux", "Stereo", "Left PGA Mux"},
 429         {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
 430         {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
 431
 432         /* Right ADC Mux */
 433         {"Right ADC Mux", "Stereo", "Right PGA Mux"},
 434         {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
 435         {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
 436
 437         /* ADC */
 438         {"Left ADC", NULL, "Left ADC Mux"},
 439         {"Right ADC", NULL, "Right ADC Mux"},
 440 };
 441
 442 static int wm8750_add_widgets(struct snd_soc_codec *codec)
 443 {
 444         snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
 445                                   ARRAY_SIZE(wm8750_dapm_widgets));
 446
 447         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 448
 449         snd_soc_dapm_new_widgets(codec);
 450         return 0;
 451 }
 452
 453 struct _coeff_div {
 454         u32 mclk;
 455         u32 rate;
 456         u16 fs;
 457         u8 sr:5;
 458         u8 usb:1;
 459 };
 460
 461 /* codec hifi mclk clock divider coefficients */
 462 static const struct _coeff_div coeff_div[] = {
 463         /* 8k */
 464         {12288000, 8000, 1536, 0x6, 0x0},
 465         {11289600, 8000, 1408, 0x16, 0x0},
 466         {18432000, 8000, 2304, 0x7, 0x0},
 467         {16934400, 8000, 2112, 0x17, 0x0},
 468         {12000000, 8000, 1500, 0x6, 0x1},
 469
 470         /* 11.025k */
 471         {11289600, 11025, 1024, 0x18, 0x0},
 472         {16934400, 11025, 1536, 0x19, 0x0},
 473         {12000000, 11025, 1088, 0x19, 0x1},
 474
 475         /* 16k */
 476         {12288000, 16000, 768, 0xa, 0x0},
 477         {18432000, 16000, 1152, 0xb, 0x0},
 478         {12000000, 16000, 750, 0xa, 0x1},
 479
 480         /* 22.05k */
 481         {11289600, 22050, 512, 0x1a, 0x0},
 482         {16934400, 22050, 768, 0x1b, 0x0},
 483         {12000000, 22050, 544, 0x1b, 0x1},
 484
 485         /* 32k */
 486         {12288000, 32000, 384, 0xc, 0x0},
 487         {18432000, 32000, 576, 0xd, 0x0},
 488         {12000000, 32000, 375, 0xa, 0x1},
 489
 490         /* 44.1k */
 491         {11289600, 44100, 256, 0x10, 0x0},
 492         {16934400, 44100, 384, 0x11, 0x0},
 493         {12000000, 44100, 272, 0x11, 0x1},
 494
 495         /* 48k */
 496         {12288000, 48000, 256, 0x0, 0x0},
 497         {18432000, 48000, 384, 0x1, 0x0},
 498         {12000000, 48000, 250, 0x0, 0x1},
 499
 500         /* 88.2k */
 501         {11289600, 88200, 128, 0x1e, 0x0},
 502         {16934400, 88200, 192, 0x1f, 0x0},
 503         {12000000, 88200, 136, 0x1f, 0x1},
 504
 505         /* 96k */
 506         {12288000, 96000, 128, 0xe, 0x0},
 507         {18432000, 96000, 192, 0xf, 0x0},
 508         {12000000, 96000, 125, 0xe, 0x1},
 509 };
 510
 511 static inline int get_coeff(int mclk, int rate)
 512 {
 513         int i;
 514
 515         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 516                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 517                         return i;
 518         }
 519
 520         printk(KERN_ERR "wm8750: could not get coeff for mclk %d @ rate %d\n",
 521                 mclk, rate);
 522         return -EINVAL;
 523 }
 524
 525 static int wm8750_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 526                 int clk_id, unsigned int freq, int dir)
 527 {
 528         struct snd_soc_codec *codec = codec_dai->codec;
 529         struct wm8750_priv *wm8750 = codec->private_data;
 530
 531         switch (freq) {
 532         case 11289600:
 533         case 12000000:
 534         case 12288000:
 535         case 16934400:
 536         case 18432000:
 537                 wm8750->sysclk = freq;
 538                 return 0;
 539         }
 540         return -EINVAL;
 541 }
 542
 543 static int wm8750_set_dai_fmt(struct snd_soc_dai *codec_dai,
 544                 unsigned int fmt)
 545 {
 546         struct snd_soc_codec *codec = codec_dai->codec;
 547         u16 iface = 0;
 548
 549         /* set master/slave audio interface */
 550         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 551         case SND_SOC_DAIFMT_CBM_CFM:
 552                 iface = 0x0040;
 553                 break;
 554         case SND_SOC_DAIFMT_CBS_CFS:
 555                 break;
 556         default:
 557                 return -EINVAL;
 558         }
 559
 560         /* interface format */
 561         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 562         case SND_SOC_DAIFMT_I2S:
 563                 iface |= 0x0002;
 564                 break;
 565         case SND_SOC_DAIFMT_RIGHT_J:
 566                 break;
 567         case SND_SOC_DAIFMT_LEFT_J:
 568                 iface |= 0x0001;
 569                 break;
 570         case SND_SOC_DAIFMT_DSP_A:
 571                 iface |= 0x0003;
 572                 break;
 573         case SND_SOC_DAIFMT_DSP_B:
 574                 iface |= 0x0013;
 575                 break;
 576         default:
 577                 return -EINVAL;
 578         }
 579
 580         /* clock inversion */
 581         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 582         case SND_SOC_DAIFMT_NB_NF:
 583                 break;
 584         case SND_SOC_DAIFMT_IB_IF:
 585                 iface |= 0x0090;
 586                 break;
 587         case SND_SOC_DAIFMT_IB_NF:
 588                 iface |= 0x0080;
 589                 break;
 590         case SND_SOC_DAIFMT_NB_IF:
 591                 iface |= 0x0010;
 592                 break;
 593         default:
 594                 return -EINVAL;
 595         }
 596
 597         wm8750_write(codec, WM8750_IFACE, iface);
 598         return 0;
 599 }
 600
 601 static int wm8750_pcm_hw_params(struct snd_pcm_substream *substream,
 602                                 struct snd_pcm_hw_params *params,
 603                                 struct snd_soc_dai *dai)
 604 {
 605         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 606         struct snd_soc_device *socdev = rtd->socdev;
 607         struct snd_soc_codec *codec = socdev->card->codec;
 608         struct wm8750_priv *wm8750 = codec->private_data;
 609         u16 iface = wm8750_read_reg_cache(codec, WM8750_IFACE) & 0x1f3;
 610         u16 srate = wm8750_read_reg_cache(codec, WM8750_SRATE) & 0x1c0;
 611         int coeff = get_coeff(wm8750->sysclk, params_rate(params));
 612
 613         /* bit size */
 614         switch (params_format(params)) {
 615         case SNDRV_PCM_FORMAT_S16_LE:
 616                 break;
 617         case SNDRV_PCM_FORMAT_S20_3LE:
 618                 iface |= 0x0004;
 619                 break;
 620         case SNDRV_PCM_FORMAT_S24_LE:
 621                 iface |= 0x0008;
 622                 break;
 623         case SNDRV_PCM_FORMAT_S32_LE:
 624                 iface |= 0x000c;
 625                 break;
 626         }
 627
 628         /* set iface & srate */
 629         wm8750_write(codec, WM8750_IFACE, iface);
 630         if (coeff >= 0)
 631                 wm8750_write(codec, WM8750_SRATE, srate |
 632                         (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
 633
 634         return 0;
 635 }
 636
 637 static int wm8750_mute(struct snd_soc_dai *dai, int mute)
 638 {
 639         struct snd_soc_codec *codec = dai->codec;
 640         u16 mute_reg = wm8750_read_reg_cache(codec, WM8750_ADCDAC) & 0xfff7;
 641
 642         if (mute)
 643                 wm8750_write(codec, WM8750_ADCDAC, mute_reg | 0x8);
 644         else
 645                 wm8750_write(codec, WM8750_ADCDAC, mute_reg);
 646         return 0;
 647 }
 648
 649 static int wm8750_set_bias_level(struct snd_soc_codec *codec,
 650                                  enum snd_soc_bias_level level)
 651 {
 652         u16 pwr_reg = wm8750_read_reg_cache(codec, WM8750_PWR1) & 0xfe3e;
 653
 654         switch (level) {
 655         case SND_SOC_BIAS_ON:
 656                 /* set vmid to 50k and unmute dac */
 657                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x00c0);
 658                 break;
 659         case SND_SOC_BIAS_PREPARE:
 660                 /* set vmid to 5k for quick power up */
 661                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
 662                 break;
 663         case SND_SOC_BIAS_STANDBY:
 664                 /* mute dac and set vmid to 500k, enable VREF */
 665                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x0141);
 666                 break;
 667         case SND_SOC_BIAS_OFF:
 668                 wm8750_write(codec, WM8750_PWR1, 0x0001);
 669                 break;
 670         }
 671         codec->bias_level = level;
 672         return 0;
 673 }
 674
 675 #define WM8750_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 676         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 677         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 678
 679 #define WM8750_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 680         SNDRV_PCM_FMTBIT_S24_LE)
 681
 682 struct snd_soc_dai wm8750_dai = {
 683         .name = "WM8750",
 684         .playback = {
 685                 .stream_name = "Playback",
 686                 .channels_min = 1,
 687                 .channels_max = 2,
 688                 .rates = WM8750_RATES,
 689                 .formats = WM8750_FORMATS,},
 690         .capture = {
 691                 .stream_name = "Capture",
 692                 .channels_min = 1,
 693                 .channels_max = 2,
 694                 .rates = WM8750_RATES,
 695                 .formats = WM8750_FORMATS,},
 696         .ops = {
 697                 .hw_params = wm8750_pcm_hw_params,
 698                 .digital_mute = wm8750_mute,
 699                 .set_fmt = wm8750_set_dai_fmt,
 700                 .set_sysclk = wm8750_set_dai_sysclk,
 701         },
 702 };
 703 EXPORT_SYMBOL_GPL(wm8750_dai);
 704
 705 static void wm8750_work(struct work_struct *work)
 706 {
 707         struct snd_soc_codec *codec =
 708                 container_of(work, struct snd_soc_codec, delayed_work.work);
 709         wm8750_set_bias_level(codec, codec->bias_level);
 710 }
 711
 712 static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
 713 {
 714         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 715         struct snd_soc_codec *codec = socdev->card->codec;
 716
 717         wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
 718         return 0;
 719 }
 720
 721 static int wm8750_resume(struct platform_device *pdev)
 722 {
 723         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 724         struct snd_soc_codec *codec = socdev->card->codec;
 725         int i;
 726         u8 data[2];
 727         u16 *cache = codec->reg_cache;
 728
 729         /* Sync reg_cache with the hardware */
 730         for (i = 0; i < ARRAY_SIZE(wm8750_reg); i++) {
 731                 if (i == WM8750_RESET)
 732                         continue;
 733                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 734                 data[1] = cache[i] & 0x00ff;
 735                 codec->hw_write(codec->control_data, data, 2);
 736         }
 737
 738         wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 739
 740         /* charge wm8750 caps */
 741         if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
 742                 wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 743                 codec->bias_level = SND_SOC_BIAS_ON;
 744                 schedule_delayed_work(&codec->delayed_work,
 745                                         msecs_to_jiffies(1000));
 746         }
 747
 748         return 0;
 749 }
 750
 751 /*
 752  * initialise the WM8750 driver
 753  * register the mixer and dsp interfaces with the kernel
 754  */
 755 static int wm8750_init(struct snd_soc_device *socdev)
 756 {
 757         struct snd_soc_codec *codec = socdev->card->codec;
 758         int reg, ret = 0;
 759
 760         codec->name = "WM8750";
 761         codec->owner = THIS_MODULE;
 762         codec->read = wm8750_read_reg_cache;
 763         codec->write = wm8750_write;
 764         codec->set_bias_level = wm8750_set_bias_level;
 765         codec->dai = &wm8750_dai;
 766         codec->num_dai = 1;
 767         codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
 768         codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
 769         if (codec->reg_cache == NULL)
 770                 return -ENOMEM;
 771
 772         wm8750_reset(codec);
 773
 774         /* register pcms */
 775         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 776         if (ret < 0) {
 777                 printk(KERN_ERR "wm8750: failed to create pcms\n");
 778                 goto pcm_err;
 779         }
 780
 781         /* charge output caps */
 782         wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 783         codec->bias_level = SND_SOC_BIAS_STANDBY;
 784         schedule_delayed_work(&codec->delayed_work, msecs_to_jiffies(1000));
 785
 786         /* set the update bits */
 787         reg = wm8750_read_reg_cache(codec, WM8750_LDAC);
 788         wm8750_write(codec, WM8750_LDAC, reg | 0x0100);
 789         reg = wm8750_read_reg_cache(codec, WM8750_RDAC);
 790         wm8750_write(codec, WM8750_RDAC, reg | 0x0100);
 791         reg = wm8750_read_reg_cache(codec, WM8750_LOUT1V);
 792         wm8750_write(codec, WM8750_LOUT1V, reg | 0x0100);
 793         reg = wm8750_read_reg_cache(codec, WM8750_ROUT1V);
 794         wm8750_write(codec, WM8750_ROUT1V, reg | 0x0100);
 795         reg = wm8750_read_reg_cache(codec, WM8750_LOUT2V);
 796         wm8750_write(codec, WM8750_LOUT2V, reg | 0x0100);
 797         reg = wm8750_read_reg_cache(codec, WM8750_ROUT2V);
 798         wm8750_write(codec, WM8750_ROUT2V, reg | 0x0100);
 799         reg = wm8750_read_reg_cache(codec, WM8750_LINVOL);
 800         wm8750_write(codec, WM8750_LINVOL, reg | 0x0100);
 801         reg = wm8750_read_reg_cache(codec, WM8750_RINVOL);
 802         wm8750_write(codec, WM8750_RINVOL, reg | 0x0100);
 803
 804         snd_soc_add_controls(codec, wm8750_snd_controls,
 805                                 ARRAY_SIZE(wm8750_snd_controls));
 806         wm8750_add_widgets(codec);
 807         ret = snd_soc_init_card(socdev);
 808         if (ret < 0) {
 809                 printk(KERN_ERR "wm8750: failed to register card\n");
 810                 goto card_err;
 811         }
 812         return ret;
 813
 814 card_err:
 815         snd_soc_free_pcms(socdev);
 816         snd_soc_dapm_free(socdev);
 817 pcm_err:
 818         kfree(codec->reg_cache);
 819         return ret;
 820 }
 821
 822 /* If the i2c layer weren't so broken, we could pass this kind of data
 823    around */
 824 static struct snd_soc_device *wm8750_socdev;
 825
 826 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 827
 828 /*
 829  * WM8750 2 wire address is determined by GPIO5
 830  * state during powerup.
 831  *    low  = 0x1a
 832  *    high = 0x1b
 833  */
 834
 835 static int wm8750_i2c_probe(struct i2c_client *i2c,
 836                             const struct i2c_device_id *id)
 837 {
 838         struct snd_soc_device *socdev = wm8750_socdev;
 839         struct snd_soc_codec *codec = socdev->card->codec;
 840         int ret;
 841
 842         i2c_set_clientdata(i2c, codec);
 843         codec->control_data = i2c;
 844
 845         ret = wm8750_init(socdev);
 846         if (ret < 0)
 847                 pr_err("failed to initialise WM8750\n");
 848
 849         return ret;
 850 }
 851
 852 static int wm8750_i2c_remove(struct i2c_client *client)
 853 {
 854         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 855         kfree(codec->reg_cache);
 856         return 0;
 857 }
 858
 859 static const struct i2c_device_id wm8750_i2c_id[] = {
 860         { "wm8750", 0 },
 861         { }
 862 };
 863 MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
 864
 865 static struct i2c_driver wm8750_i2c_driver = {
 866         .driver = {
 867                 .name = "WM8750 I2C Codec",
 868                 .owner = THIS_MODULE,
 869         },
 870         .probe =    wm8750_i2c_probe,
 871         .remove =   wm8750_i2c_remove,
 872         .id_table = wm8750_i2c_id,
 873 };
 874
 875 static int wm8750_add_i2c_device(struct platform_device *pdev,
 876                                  const struct wm8750_setup_data *setup)
 877 {
 878         struct i2c_board_info info;
 879         struct i2c_adapter *adapter;
 880         struct i2c_client *client;
 881         int ret;
 882
 883         ret = i2c_add_driver(&wm8750_i2c_driver);
 884         if (ret != 0) {
 885                 dev_err(&pdev->dev, "can't add i2c driver\n");
 886                 return ret;
 887         }
 888
 889         memset(&info, 0, sizeof(struct i2c_board_info));
 890         info.addr = setup->i2c_address;
 891         strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
 892
 893         adapter = i2c_get_adapter(setup->i2c_bus);
 894         if (!adapter) {
 895                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 896                         setup->i2c_bus);
 897                 goto err_driver;
 898         }
 899
 900         client = i2c_new_device(adapter, &info);
 901         i2c_put_adapter(adapter);
 902         if (!client) {
 903                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 904                         (unsigned int)info.addr);
 905                 goto err_driver;
 906         }
 907
 908         return 0;
 909
 910 err_driver:
 911         i2c_del_driver(&wm8750_i2c_driver);
 912         return -ENODEV;
 913 }
 914 #endif
 915
 916 #if defined(CONFIG_SPI_MASTER)
 917 static int __devinit wm8750_spi_probe(struct spi_device *spi)
 918 {
 919         struct snd_soc_device *socdev = wm8750_socdev;
 920         struct snd_soc_codec *codec = socdev->card->codec;
 921         int ret;
 922
 923         codec->control_data = spi;
 924
 925         ret = wm8750_init(socdev);
 926         if (ret < 0)
 927                 dev_err(&spi->dev, "failed to initialise WM8750\n");
 928
 929         return ret;
 930 }
 931
 932 static int __devexit wm8750_spi_remove(struct spi_device *spi)
 933 {
 934         return 0;
 935 }
 936
 937 static struct spi_driver wm8750_spi_driver = {
 938         .driver = {
 939                 .name   = "wm8750",
 940                 .bus    = &spi_bus_type,
 941                 .owner  = THIS_MODULE,
 942         },
 943         .probe          = wm8750_spi_probe,
 944         .remove         = __devexit_p(wm8750_spi_remove),
 945 };
 946
 947 static int wm8750_spi_write(struct spi_device *spi, const char *data, int len)
 948 {
 949         struct spi_transfer t;
 950         struct spi_message m;
 951         u8 msg[2];
 952
 953         if (len <= 0)
 954                 return 0;
 955
 956         msg[0] = data[0];
 957         msg[1] = data[1];
 958
 959         spi_message_init(&m);
 960         memset(&t, 0, (sizeof t));
 961
 962         t.tx_buf = &msg[0];
 963         t.len = len;
 964
 965         spi_message_add_tail(&t, &m);
 966         spi_sync(spi, &m);
 967
 968         return len;
 969 }
 970 #endif
 971
 972 static int wm8750_probe(struct platform_device *pdev)
 973 {
 974         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 975         struct wm8750_setup_data *setup = socdev->codec_data;
 976         struct snd_soc_codec *codec;
 977         struct wm8750_priv *wm8750;
 978         int ret;
 979
 980         pr_info("WM8750 Audio Codec %s", WM8750_VERSION);
 981         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 982         if (codec == NULL)
 983                 return -ENOMEM;
 984
 985         wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
 986         if (wm8750 == NULL) {
 987                 kfree(codec);
 988                 return -ENOMEM;
 989         }
 990
 991         codec->private_data = wm8750;
 992         socdev->card->codec = codec;
 993         mutex_init(&codec->mutex);
 994         INIT_LIST_HEAD(&codec->dapm_widgets);
 995         INIT_LIST_HEAD(&codec->dapm_paths);
 996         wm8750_socdev = socdev;
 997         INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
 998
 999         ret = -ENODEV;
1000
1001 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1002         if (setup->i2c_address) {
1003                 codec->hw_write = (hw_write_t)i2c_master_send;
1004                 ret = wm8750_add_i2c_device(pdev, setup);
1005         }
1006 #endif
1007 #if defined(CONFIG_SPI_MASTER)
1008         if (setup->spi) {
1009                 codec->hw_write = (hw_write_t)wm8750_spi_write;
1010                 ret = spi_register_driver(&wm8750_spi_driver);
1011                 if (ret != 0)
1012                         printk(KERN_ERR "can't add spi driver");
1013         }
1014 #endif
1015
1016         if (ret != 0) {
1017                 kfree(codec->private_data);
1018                 kfree(codec);
1019         }
1020         return ret;
1021 }
1022
1023 /*
1024  * This function forces any delayed work to be queued and run.
1025  */
1026 static int run_delayed_work(struct delayed_work *dwork)
1027 {
1028         int ret;
1029
1030         /* cancel any work waiting to be queued. */
1031         ret = cancel_delayed_work(dwork);
1032
1033         /* if there was any work waiting then we run it now and
1034          * wait for it's completion */
1035         if (ret) {
1036                 schedule_delayed_work(dwork, 0);
1037                 flush_scheduled_work();
1038         }
1039         return ret;
1040 }
1041
1042 /* power down chip */
1043 static int wm8750_remove(struct platform_device *pdev)
1044 {
1045         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1046         struct snd_soc_codec *codec = socdev->card->codec;
1047
1048         if (codec->control_data)
1049                 wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
1050         run_delayed_work(&codec->delayed_work);
1051         snd_soc_free_pcms(socdev);
1052         snd_soc_dapm_free(socdev);
1053 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1054         i2c_unregister_device(codec->control_data);
1055         i2c_del_driver(&wm8750_i2c_driver);
1056 #endif
1057 #if defined(CONFIG_SPI_MASTER)
1058         spi_unregister_driver(&wm8750_spi_driver);
1059 #endif
1060         kfree(codec->private_data);
1061         kfree(codec);
1062
1063         return 0;
1064 }
1065
1066 struct snd_soc_codec_device soc_codec_dev_wm8750 = {
1067         .probe =        wm8750_probe,
1068         .remove =       wm8750_remove,
1069         .suspend =      wm8750_suspend,
1070         .resume =       wm8750_resume,
1071 };
1072 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
1073
1074 static int __init wm8750_modinit(void)
1075 {
1076         return snd_soc_register_dai(&wm8750_dai);
1077 }
1078 module_init(wm8750_modinit);
1079
1080 static void __exit wm8750_exit(void)
1081 {
1082         snd_soc_unregister_dai(&wm8750_dai);
1083 }
1084 module_exit(wm8750_exit);
1085
1086 MODULE_DESCRIPTION("ASoC WM8750 driver");
1087 MODULE_AUTHOR("Liam Girdwood");
1088 MODULE_LICENSE("GPL");