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 #define wm8750_reset(c) snd_soc_write(c, WM8750_RESET, 0)
  59
  60 /*
  61  * WM8750 Controls
  62  */
  63 static const char *wm8750_bass[] = {"Linear Control", "Adaptive Boost"};
  64 static const char *wm8750_bass_filter[] = { "130Hz @ 48kHz", "200Hz @ 48kHz" };
  65 static const char *wm8750_treble[] = {"8kHz", "4kHz"};
  66 static const char *wm8750_3d_lc[] = {"200Hz", "500Hz"};
  67 static const char *wm8750_3d_uc[] = {"2.2kHz", "1.5kHz"};
  68 static const char *wm8750_3d_func[] = {"Capture", "Playback"};
  69 static const char *wm8750_alc_func[] = {"Off", "Right", "Left", "Stereo"};
  70 static const char *wm8750_ng_type[] = {"Constant PGA Gain",
  71         "Mute ADC Output"};
  72 static const char *wm8750_line_mux[] = {"Line 1", "Line 2", "Line 3", "PGA",
  73         "Differential"};
  74 static const char *wm8750_pga_sel[] = {"Line 1", "Line 2", "Line 3",
  75         "Differential"};
  76 static const char *wm8750_out3[] = {"VREF", "ROUT1 + Vol", "MonoOut",
  77         "ROUT1"};
  78 static const char *wm8750_diff_sel[] = {"Line 1", "Line 2"};
  79 static const char *wm8750_adcpol[] = {"Normal", "L Invert", "R Invert",
  80         "L + R Invert"};
  81 static const char *wm8750_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
  82 static const char *wm8750_mono_mux[] = {"Stereo", "Mono (Left)",
  83         "Mono (Right)", "Digital Mono"};
  84
  85 static const struct soc_enum wm8750_enum[] = {
  86 SOC_ENUM_SINGLE(WM8750_BASS, 7, 2, wm8750_bass),
  87 SOC_ENUM_SINGLE(WM8750_BASS, 6, 2, wm8750_bass_filter),
  88 SOC_ENUM_SINGLE(WM8750_TREBLE, 6, 2, wm8750_treble),
  89 SOC_ENUM_SINGLE(WM8750_3D, 5, 2, wm8750_3d_lc),
  90 SOC_ENUM_SINGLE(WM8750_3D, 6, 2, wm8750_3d_uc),
  91 SOC_ENUM_SINGLE(WM8750_3D, 7, 2, wm8750_3d_func),
  92 SOC_ENUM_SINGLE(WM8750_ALC1, 7, 4, wm8750_alc_func),
  93 SOC_ENUM_SINGLE(WM8750_NGATE, 1, 2, wm8750_ng_type),
  94 SOC_ENUM_SINGLE(WM8750_LOUTM1, 0, 5, wm8750_line_mux),
  95 SOC_ENUM_SINGLE(WM8750_ROUTM1, 0, 5, wm8750_line_mux),
  96 SOC_ENUM_SINGLE(WM8750_LADCIN, 6, 4, wm8750_pga_sel), /* 10 */
  97 SOC_ENUM_SINGLE(WM8750_RADCIN, 6, 4, wm8750_pga_sel),
  98 SOC_ENUM_SINGLE(WM8750_ADCTL2, 7, 4, wm8750_out3),
  99 SOC_ENUM_SINGLE(WM8750_ADCIN, 8, 2, wm8750_diff_sel),
 100 SOC_ENUM_SINGLE(WM8750_ADCDAC, 5, 4, wm8750_adcpol),
 101 SOC_ENUM_SINGLE(WM8750_ADCDAC, 1, 4, wm8750_deemph),
 102 SOC_ENUM_SINGLE(WM8750_ADCIN, 6, 4, wm8750_mono_mux), /* 16 */
 103
 104 };
 105
 106 static const struct snd_kcontrol_new wm8750_snd_controls[] = {
 107
 108 SOC_DOUBLE_R("Capture Volume", WM8750_LINVOL, WM8750_RINVOL, 0, 63, 0),
 109 SOC_DOUBLE_R("Capture ZC Switch", WM8750_LINVOL, WM8750_RINVOL, 6, 1, 0),
 110 SOC_DOUBLE_R("Capture Switch", WM8750_LINVOL, WM8750_RINVOL, 7, 1, 1),
 111
 112 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8750_LOUT1V,
 113         WM8750_ROUT1V, 7, 1, 0),
 114 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8750_LOUT2V,
 115         WM8750_ROUT2V, 7, 1, 0),
 116
 117 SOC_ENUM("Playback De-emphasis", wm8750_enum[15]),
 118
 119 SOC_ENUM("Capture Polarity", wm8750_enum[14]),
 120 SOC_SINGLE("Playback 6dB Attenuate", WM8750_ADCDAC, 7, 1, 0),
 121 SOC_SINGLE("Capture 6dB Attenuate", WM8750_ADCDAC, 8, 1, 0),
 122
 123 SOC_DOUBLE_R("PCM Volume", WM8750_LDAC, WM8750_RDAC, 0, 255, 0),
 124
 125 SOC_ENUM("Bass Boost", wm8750_enum[0]),
 126 SOC_ENUM("Bass Filter", wm8750_enum[1]),
 127 SOC_SINGLE("Bass Volume", WM8750_BASS, 0, 15, 1),
 128
 129 SOC_SINGLE("Treble Volume", WM8750_TREBLE, 0, 15, 1),
 130 SOC_ENUM("Treble Cut-off", wm8750_enum[2]),
 131
 132 SOC_SINGLE("3D Switch", WM8750_3D, 0, 1, 0),
 133 SOC_SINGLE("3D Volume", WM8750_3D, 1, 15, 0),
 134 SOC_ENUM("3D Lower Cut-off", wm8750_enum[3]),
 135 SOC_ENUM("3D Upper Cut-off", wm8750_enum[4]),
 136 SOC_ENUM("3D Mode", wm8750_enum[5]),
 137
 138 SOC_SINGLE("ALC Capture Target Volume", WM8750_ALC1, 0, 7, 0),
 139 SOC_SINGLE("ALC Capture Max Volume", WM8750_ALC1, 4, 7, 0),
 140 SOC_ENUM("ALC Capture Function", wm8750_enum[6]),
 141 SOC_SINGLE("ALC Capture ZC Switch", WM8750_ALC2, 7, 1, 0),
 142 SOC_SINGLE("ALC Capture Hold Time", WM8750_ALC2, 0, 15, 0),
 143 SOC_SINGLE("ALC Capture Decay Time", WM8750_ALC3, 4, 15, 0),
 144 SOC_SINGLE("ALC Capture Attack Time", WM8750_ALC3, 0, 15, 0),
 145 SOC_SINGLE("ALC Capture NG Threshold", WM8750_NGATE, 3, 31, 0),
 146 SOC_ENUM("ALC Capture NG Type", wm8750_enum[4]),
 147 SOC_SINGLE("ALC Capture NG Switch", WM8750_NGATE, 0, 1, 0),
 148
 149 SOC_SINGLE("Left ADC Capture Volume", WM8750_LADC, 0, 255, 0),
 150 SOC_SINGLE("Right ADC Capture Volume", WM8750_RADC, 0, 255, 0),
 151
 152 SOC_SINGLE("ZC Timeout Switch", WM8750_ADCTL1, 0, 1, 0),
 153 SOC_SINGLE("Playback Invert Switch", WM8750_ADCTL1, 1, 1, 0),
 154
 155 SOC_SINGLE("Right Speaker Playback Invert Switch", WM8750_ADCTL2, 4, 1, 0),
 156
 157 /* Unimplemented */
 158 /* ADCDAC Bit 0 - ADCHPD */
 159 /* ADCDAC Bit 4 - HPOR */
 160 /* ADCTL1 Bit 2,3 - DATSEL */
 161 /* ADCTL1 Bit 4,5 - DMONOMIX */
 162 /* ADCTL1 Bit 6,7 - VSEL */
 163 /* ADCTL2 Bit 2 - LRCM */
 164 /* ADCTL2 Bit 3 - TRI */
 165 /* ADCTL3 Bit 5 - HPFLREN */
 166 /* ADCTL3 Bit 6 - VROI */
 167 /* ADCTL3 Bit 7,8 - ADCLRM */
 168 /* ADCIN Bit 4 - LDCM */
 169 /* ADCIN Bit 5 - RDCM */
 170
 171 SOC_DOUBLE_R("Mic Boost", WM8750_LADCIN, WM8750_RADCIN, 4, 3, 0),
 172
 173 SOC_DOUBLE_R("Bypass Left Playback Volume", WM8750_LOUTM1,
 174         WM8750_LOUTM2, 4, 7, 1),
 175 SOC_DOUBLE_R("Bypass Right Playback Volume", WM8750_ROUTM1,
 176         WM8750_ROUTM2, 4, 7, 1),
 177 SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8750_MOUTM1,
 178         WM8750_MOUTM2, 4, 7, 1),
 179
 180 SOC_SINGLE("Mono Playback ZC Switch", WM8750_MOUTV, 7, 1, 0),
 181
 182 SOC_DOUBLE_R("Headphone Playback Volume", WM8750_LOUT1V, WM8750_ROUT1V,
 183         0, 127, 0),
 184 SOC_DOUBLE_R("Speaker Playback Volume", WM8750_LOUT2V, WM8750_ROUT2V,
 185         0, 127, 0),
 186
 187 SOC_SINGLE("Mono Playback Volume", WM8750_MOUTV, 0, 127, 0),
 188
 189 };
 190
 191 /*
 192  * DAPM Controls
 193  */
 194
 195 /* Left Mixer */
 196 static const struct snd_kcontrol_new wm8750_left_mixer_controls[] = {
 197 SOC_DAPM_SINGLE("Playback Switch", WM8750_LOUTM1, 8, 1, 0),
 198 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_LOUTM1, 7, 1, 0),
 199 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_LOUTM2, 8, 1, 0),
 200 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_LOUTM2, 7, 1, 0),
 201 };
 202
 203 /* Right Mixer */
 204 static const struct snd_kcontrol_new wm8750_right_mixer_controls[] = {
 205 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_ROUTM1, 8, 1, 0),
 206 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_ROUTM1, 7, 1, 0),
 207 SOC_DAPM_SINGLE("Playback Switch", WM8750_ROUTM2, 8, 1, 0),
 208 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_ROUTM2, 7, 1, 0),
 209 };
 210
 211 /* Mono Mixer */
 212 static const struct snd_kcontrol_new wm8750_mono_mixer_controls[] = {
 213 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_MOUTM1, 8, 1, 0),
 214 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_MOUTM1, 7, 1, 0),
 215 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_MOUTM2, 8, 1, 0),
 216 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_MOUTM2, 7, 1, 0),
 217 };
 218
 219 /* Left Line Mux */
 220 static const struct snd_kcontrol_new wm8750_left_line_controls =
 221 SOC_DAPM_ENUM("Route", wm8750_enum[8]);
 222
 223 /* Right Line Mux */
 224 static const struct snd_kcontrol_new wm8750_right_line_controls =
 225 SOC_DAPM_ENUM("Route", wm8750_enum[9]);
 226
 227 /* Left PGA Mux */
 228 static const struct snd_kcontrol_new wm8750_left_pga_controls =
 229 SOC_DAPM_ENUM("Route", wm8750_enum[10]);
 230
 231 /* Right PGA Mux */
 232 static const struct snd_kcontrol_new wm8750_right_pga_controls =
 233 SOC_DAPM_ENUM("Route", wm8750_enum[11]);
 234
 235 /* Out 3 Mux */
 236 static const struct snd_kcontrol_new wm8750_out3_controls =
 237 SOC_DAPM_ENUM("Route", wm8750_enum[12]);
 238
 239 /* Differential Mux */
 240 static const struct snd_kcontrol_new wm8750_diffmux_controls =
 241 SOC_DAPM_ENUM("Route", wm8750_enum[13]);
 242
 243 /* Mono ADC Mux */
 244 static const struct snd_kcontrol_new wm8750_monomux_controls =
 245 SOC_DAPM_ENUM("Route", wm8750_enum[16]);
 246
 247 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 248         SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
 249                 &wm8750_left_mixer_controls[0],
 250                 ARRAY_SIZE(wm8750_left_mixer_controls)),
 251         SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
 252                 &wm8750_right_mixer_controls[0],
 253                 ARRAY_SIZE(wm8750_right_mixer_controls)),
 254         SND_SOC_DAPM_MIXER("Mono Mixer", WM8750_PWR2, 2, 0,
 255                 &wm8750_mono_mixer_controls[0],
 256                 ARRAY_SIZE(wm8750_mono_mixer_controls)),
 257
 258         SND_SOC_DAPM_PGA("Right Out 2", WM8750_PWR2, 3, 0, NULL, 0),
 259         SND_SOC_DAPM_PGA("Left Out 2", WM8750_PWR2, 4, 0, NULL, 0),
 260         SND_SOC_DAPM_PGA("Right Out 1", WM8750_PWR2, 5, 0, NULL, 0),
 261         SND_SOC_DAPM_PGA("Left Out 1", WM8750_PWR2, 6, 0, NULL, 0),
 262         SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8750_PWR2, 7, 0),
 263         SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8750_PWR2, 8, 0),
 264
 265         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8750_PWR1, 1, 0),
 266         SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8750_PWR1, 2, 0),
 267         SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8750_PWR1, 3, 0),
 268
 269         SND_SOC_DAPM_MUX("Left PGA Mux", WM8750_PWR1, 5, 0,
 270                 &wm8750_left_pga_controls),
 271         SND_SOC_DAPM_MUX("Right PGA Mux", WM8750_PWR1, 4, 0,
 272                 &wm8750_right_pga_controls),
 273         SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
 274                 &wm8750_left_line_controls),
 275         SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
 276                 &wm8750_right_line_controls),
 277
 278         SND_SOC_DAPM_MUX("Out3 Mux", SND_SOC_NOPM, 0, 0, &wm8750_out3_controls),
 279         SND_SOC_DAPM_PGA("Out 3", WM8750_PWR2, 1, 0, NULL, 0),
 280         SND_SOC_DAPM_PGA("Mono Out 1", WM8750_PWR2, 2, 0, NULL, 0),
 281
 282         SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
 283                 &wm8750_diffmux_controls),
 284         SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
 285                 &wm8750_monomux_controls),
 286         SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
 287                 &wm8750_monomux_controls),
 288
 289         SND_SOC_DAPM_OUTPUT("LOUT1"),
 290         SND_SOC_DAPM_OUTPUT("ROUT1"),
 291         SND_SOC_DAPM_OUTPUT("LOUT2"),
 292         SND_SOC_DAPM_OUTPUT("ROUT2"),
 293         SND_SOC_DAPM_OUTPUT("MONO1"),
 294         SND_SOC_DAPM_OUTPUT("OUT3"),
 295         SND_SOC_DAPM_OUTPUT("VREF"),
 296
 297         SND_SOC_DAPM_INPUT("LINPUT1"),
 298         SND_SOC_DAPM_INPUT("LINPUT2"),
 299         SND_SOC_DAPM_INPUT("LINPUT3"),
 300         SND_SOC_DAPM_INPUT("RINPUT1"),
 301         SND_SOC_DAPM_INPUT("RINPUT2"),
 302         SND_SOC_DAPM_INPUT("RINPUT3"),
 303 };
 304
 305 static const struct snd_soc_dapm_route audio_map[] = {
 306         /* left mixer */
 307         {"Left Mixer", "Playback Switch", "Left DAC"},
 308         {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
 309         {"Left Mixer", "Right Playback Switch", "Right DAC"},
 310         {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
 311
 312         /* right mixer */
 313         {"Right Mixer", "Left Playback Switch", "Left DAC"},
 314         {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
 315         {"Right Mixer", "Playback Switch", "Right DAC"},
 316         {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
 317
 318         /* left out 1 */
 319         {"Left Out 1", NULL, "Left Mixer"},
 320         {"LOUT1", NULL, "Left Out 1"},
 321
 322         /* left out 2 */
 323         {"Left Out 2", NULL, "Left Mixer"},
 324         {"LOUT2", NULL, "Left Out 2"},
 325
 326         /* right out 1 */
 327         {"Right Out 1", NULL, "Right Mixer"},
 328         {"ROUT1", NULL, "Right Out 1"},
 329
 330         /* right out 2 */
 331         {"Right Out 2", NULL, "Right Mixer"},
 332         {"ROUT2", NULL, "Right Out 2"},
 333
 334         /* mono mixer */
 335         {"Mono Mixer", "Left Playback Switch", "Left DAC"},
 336         {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
 337         {"Mono Mixer", "Right Playback Switch", "Right DAC"},
 338         {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
 339
 340         /* mono out */
 341         {"Mono Out 1", NULL, "Mono Mixer"},
 342         {"MONO1", NULL, "Mono Out 1"},
 343
 344         /* out 3 */
 345         {"Out3 Mux", "VREF", "VREF"},
 346         {"Out3 Mux", "ROUT1 + Vol", "ROUT1"},
 347         {"Out3 Mux", "ROUT1", "Right Mixer"},
 348         {"Out3 Mux", "MonoOut", "MONO1"},
 349         {"Out 3", NULL, "Out3 Mux"},
 350         {"OUT3", NULL, "Out 3"},
 351
 352         /* Left Line Mux */
 353         {"Left Line Mux", "Line 1", "LINPUT1"},
 354         {"Left Line Mux", "Line 2", "LINPUT2"},
 355         {"Left Line Mux", "Line 3", "LINPUT3"},
 356         {"Left Line Mux", "PGA", "Left PGA Mux"},
 357         {"Left Line Mux", "Differential", "Differential Mux"},
 358
 359         /* Right Line Mux */
 360         {"Right Line Mux", "Line 1", "RINPUT1"},
 361         {"Right Line Mux", "Line 2", "RINPUT2"},
 362         {"Right Line Mux", "Line 3", "RINPUT3"},
 363         {"Right Line Mux", "PGA", "Right PGA Mux"},
 364         {"Right Line Mux", "Differential", "Differential Mux"},
 365
 366         /* Left PGA Mux */
 367         {"Left PGA Mux", "Line 1", "LINPUT1"},
 368         {"Left PGA Mux", "Line 2", "LINPUT2"},
 369         {"Left PGA Mux", "Line 3", "LINPUT3"},
 370         {"Left PGA Mux", "Differential", "Differential Mux"},
 371
 372         /* Right PGA Mux */
 373         {"Right PGA Mux", "Line 1", "RINPUT1"},
 374         {"Right PGA Mux", "Line 2", "RINPUT2"},
 375         {"Right PGA Mux", "Line 3", "RINPUT3"},
 376         {"Right PGA Mux", "Differential", "Differential Mux"},
 377
 378         /* Differential Mux */
 379         {"Differential Mux", "Line 1", "LINPUT1"},
 380         {"Differential Mux", "Line 1", "RINPUT1"},
 381         {"Differential Mux", "Line 2", "LINPUT2"},
 382         {"Differential Mux", "Line 2", "RINPUT2"},
 383
 384         /* Left ADC Mux */
 385         {"Left ADC Mux", "Stereo", "Left PGA Mux"},
 386         {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
 387         {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
 388
 389         /* Right ADC Mux */
 390         {"Right ADC Mux", "Stereo", "Right PGA Mux"},
 391         {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
 392         {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
 393
 394         /* ADC */
 395         {"Left ADC", NULL, "Left ADC Mux"},
 396         {"Right ADC", NULL, "Right ADC Mux"},
 397 };
 398
 399 static int wm8750_add_widgets(struct snd_soc_codec *codec)
 400 {
 401         snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
 402                                   ARRAY_SIZE(wm8750_dapm_widgets));
 403
 404         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 405
 406         snd_soc_dapm_new_widgets(codec);
 407         return 0;
 408 }
 409
 410 struct _coeff_div {
 411         u32 mclk;
 412         u32 rate;
 413         u16 fs;
 414         u8 sr:5;
 415         u8 usb:1;
 416 };
 417
 418 /* codec hifi mclk clock divider coefficients */
 419 static const struct _coeff_div coeff_div[] = {
 420         /* 8k */
 421         {12288000, 8000, 1536, 0x6, 0x0},
 422         {11289600, 8000, 1408, 0x16, 0x0},
 423         {18432000, 8000, 2304, 0x7, 0x0},
 424         {16934400, 8000, 2112, 0x17, 0x0},
 425         {12000000, 8000, 1500, 0x6, 0x1},
 426
 427         /* 11.025k */
 428         {11289600, 11025, 1024, 0x18, 0x0},
 429         {16934400, 11025, 1536, 0x19, 0x0},
 430         {12000000, 11025, 1088, 0x19, 0x1},
 431
 432         /* 16k */
 433         {12288000, 16000, 768, 0xa, 0x0},
 434         {18432000, 16000, 1152, 0xb, 0x0},
 435         {12000000, 16000, 750, 0xa, 0x1},
 436
 437         /* 22.05k */
 438         {11289600, 22050, 512, 0x1a, 0x0},
 439         {16934400, 22050, 768, 0x1b, 0x0},
 440         {12000000, 22050, 544, 0x1b, 0x1},
 441
 442         /* 32k */
 443         {12288000, 32000, 384, 0xc, 0x0},
 444         {18432000, 32000, 576, 0xd, 0x0},
 445         {12000000, 32000, 375, 0xa, 0x1},
 446
 447         /* 44.1k */
 448         {11289600, 44100, 256, 0x10, 0x0},
 449         {16934400, 44100, 384, 0x11, 0x0},
 450         {12000000, 44100, 272, 0x11, 0x1},
 451
 452         /* 48k */
 453         {12288000, 48000, 256, 0x0, 0x0},
 454         {18432000, 48000, 384, 0x1, 0x0},
 455         {12000000, 48000, 250, 0x0, 0x1},
 456
 457         /* 88.2k */
 458         {11289600, 88200, 128, 0x1e, 0x0},
 459         {16934400, 88200, 192, 0x1f, 0x0},
 460         {12000000, 88200, 136, 0x1f, 0x1},
 461
 462         /* 96k */
 463         {12288000, 96000, 128, 0xe, 0x0},
 464         {18432000, 96000, 192, 0xf, 0x0},
 465         {12000000, 96000, 125, 0xe, 0x1},
 466 };
 467
 468 static inline int get_coeff(int mclk, int rate)
 469 {
 470         int i;
 471
 472         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 473                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 474                         return i;
 475         }
 476
 477         printk(KERN_ERR "wm8750: could not get coeff for mclk %d @ rate %d\n",
 478                 mclk, rate);
 479         return -EINVAL;
 480 }
 481
 482 static int wm8750_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 483                 int clk_id, unsigned int freq, int dir)
 484 {
 485         struct snd_soc_codec *codec = codec_dai->codec;
 486         struct wm8750_priv *wm8750 = codec->private_data;
 487
 488         switch (freq) {
 489         case 11289600:
 490         case 12000000:
 491         case 12288000:
 492         case 16934400:
 493         case 18432000:
 494                 wm8750->sysclk = freq;
 495                 return 0;
 496         }
 497         return -EINVAL;
 498 }
 499
 500 static int wm8750_set_dai_fmt(struct snd_soc_dai *codec_dai,
 501                 unsigned int fmt)
 502 {
 503         struct snd_soc_codec *codec = codec_dai->codec;
 504         u16 iface = 0;
 505
 506         /* set master/slave audio interface */
 507         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 508         case SND_SOC_DAIFMT_CBM_CFM:
 509                 iface = 0x0040;
 510                 break;
 511         case SND_SOC_DAIFMT_CBS_CFS:
 512                 break;
 513         default:
 514                 return -EINVAL;
 515         }
 516
 517         /* interface format */
 518         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 519         case SND_SOC_DAIFMT_I2S:
 520                 iface |= 0x0002;
 521                 break;
 522         case SND_SOC_DAIFMT_RIGHT_J:
 523                 break;
 524         case SND_SOC_DAIFMT_LEFT_J:
 525                 iface |= 0x0001;
 526                 break;
 527         case SND_SOC_DAIFMT_DSP_A:
 528                 iface |= 0x0003;
 529                 break;
 530         case SND_SOC_DAIFMT_DSP_B:
 531                 iface |= 0x0013;
 532                 break;
 533         default:
 534                 return -EINVAL;
 535         }
 536
 537         /* clock inversion */
 538         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 539         case SND_SOC_DAIFMT_NB_NF:
 540                 break;
 541         case SND_SOC_DAIFMT_IB_IF:
 542                 iface |= 0x0090;
 543                 break;
 544         case SND_SOC_DAIFMT_IB_NF:
 545                 iface |= 0x0080;
 546                 break;
 547         case SND_SOC_DAIFMT_NB_IF:
 548                 iface |= 0x0010;
 549                 break;
 550         default:
 551                 return -EINVAL;
 552         }
 553
 554         snd_soc_write(codec, WM8750_IFACE, iface);
 555         return 0;
 556 }
 557
 558 static int wm8750_pcm_hw_params(struct snd_pcm_substream *substream,
 559                                 struct snd_pcm_hw_params *params,
 560                                 struct snd_soc_dai *dai)
 561 {
 562         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 563         struct snd_soc_device *socdev = rtd->socdev;
 564         struct snd_soc_codec *codec = socdev->card->codec;
 565         struct wm8750_priv *wm8750 = codec->private_data;
 566         u16 iface = snd_soc_read(codec, WM8750_IFACE) & 0x1f3;
 567         u16 srate = snd_soc_read(codec, WM8750_SRATE) & 0x1c0;
 568         int coeff = get_coeff(wm8750->sysclk, params_rate(params));
 569
 570         /* bit size */
 571         switch (params_format(params)) {
 572         case SNDRV_PCM_FORMAT_S16_LE:
 573                 break;
 574         case SNDRV_PCM_FORMAT_S20_3LE:
 575                 iface |= 0x0004;
 576                 break;
 577         case SNDRV_PCM_FORMAT_S24_LE:
 578                 iface |= 0x0008;
 579                 break;
 580         case SNDRV_PCM_FORMAT_S32_LE:
 581                 iface |= 0x000c;
 582                 break;
 583         }
 584
 585         /* set iface & srate */
 586         snd_soc_write(codec, WM8750_IFACE, iface);
 587         if (coeff >= 0)
 588                 snd_soc_write(codec, WM8750_SRATE, srate |
 589                         (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
 590
 591         return 0;
 592 }
 593
 594 static int wm8750_mute(struct snd_soc_dai *dai, int mute)
 595 {
 596         struct snd_soc_codec *codec = dai->codec;
 597         u16 mute_reg = snd_soc_read(codec, WM8750_ADCDAC) & 0xfff7;
 598
 599         if (mute)
 600                 snd_soc_write(codec, WM8750_ADCDAC, mute_reg | 0x8);
 601         else
 602                 snd_soc_write(codec, WM8750_ADCDAC, mute_reg);
 603         return 0;
 604 }
 605
 606 static int wm8750_set_bias_level(struct snd_soc_codec *codec,
 607                                  enum snd_soc_bias_level level)
 608 {
 609         u16 pwr_reg = snd_soc_read(codec, WM8750_PWR1) & 0xfe3e;
 610
 611         switch (level) {
 612         case SND_SOC_BIAS_ON:
 613                 /* set vmid to 50k and unmute dac */
 614                 snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x00c0);
 615                 break;
 616         case SND_SOC_BIAS_PREPARE:
 617                 /* set vmid to 5k for quick power up */
 618                 snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
 619                 break;
 620         case SND_SOC_BIAS_STANDBY:
 621                 /* mute dac and set vmid to 500k, enable VREF */
 622                 snd_soc_write(codec, WM8750_PWR1, pwr_reg | 0x0141);
 623                 break;
 624         case SND_SOC_BIAS_OFF:
 625                 snd_soc_write(codec, WM8750_PWR1, 0x0001);
 626                 break;
 627         }
 628         codec->bias_level = level;
 629         return 0;
 630 }
 631
 632 #define WM8750_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 633         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 634         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 635
 636 #define WM8750_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 637         SNDRV_PCM_FMTBIT_S24_LE)
 638
 639 static struct snd_soc_dai_ops wm8750_dai_ops = {
 640         .hw_params      = wm8750_pcm_hw_params,
 641         .digital_mute   = wm8750_mute,
 642         .set_fmt        = wm8750_set_dai_fmt,
 643         .set_sysclk     = wm8750_set_dai_sysclk,
 644 };
 645
 646 struct snd_soc_dai wm8750_dai = {
 647         .name = "WM8750",
 648         .playback = {
 649                 .stream_name = "Playback",
 650                 .channels_min = 1,
 651                 .channels_max = 2,
 652                 .rates = WM8750_RATES,
 653                 .formats = WM8750_FORMATS,},
 654         .capture = {
 655                 .stream_name = "Capture",
 656                 .channels_min = 1,
 657                 .channels_max = 2,
 658                 .rates = WM8750_RATES,
 659                 .formats = WM8750_FORMATS,},
 660         .ops = &wm8750_dai_ops,
 661 };
 662 EXPORT_SYMBOL_GPL(wm8750_dai);
 663
 664 static void wm8750_work(struct work_struct *work)
 665 {
 666         struct snd_soc_codec *codec =
 667                 container_of(work, struct snd_soc_codec, delayed_work.work);
 668         wm8750_set_bias_level(codec, codec->bias_level);
 669 }
 670
 671 static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
 672 {
 673         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 674         struct snd_soc_codec *codec = socdev->card->codec;
 675
 676         wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
 677         return 0;
 678 }
 679
 680 static int wm8750_resume(struct platform_device *pdev)
 681 {
 682         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 683         struct snd_soc_codec *codec = socdev->card->codec;
 684         int i;
 685         u8 data[2];
 686         u16 *cache = codec->reg_cache;
 687
 688         /* Sync reg_cache with the hardware */
 689         for (i = 0; i < ARRAY_SIZE(wm8750_reg); i++) {
 690                 if (i == WM8750_RESET)
 691                         continue;
 692                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 693                 data[1] = cache[i] & 0x00ff;
 694                 codec->hw_write(codec->control_data, data, 2);
 695         }
 696
 697         wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 698
 699         /* charge wm8750 caps */
 700         if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
 701                 wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 702                 codec->bias_level = SND_SOC_BIAS_ON;
 703                 schedule_delayed_work(&codec->delayed_work,
 704                                         msecs_to_jiffies(1000));
 705         }
 706
 707         return 0;
 708 }
 709
 710 /*
 711  * initialise the WM8750 driver
 712  * register the mixer and dsp interfaces with the kernel
 713  */
 714 static int wm8750_init(struct snd_soc_device *socdev,
 715                        enum snd_soc_control_type control)
 716 {
 717         struct snd_soc_codec *codec = socdev->card->codec;
 718         int reg, ret = 0;
 719
 720         codec->name = "WM8750";
 721         codec->owner = THIS_MODULE;
 722         codec->set_bias_level = wm8750_set_bias_level;
 723         codec->dai = &wm8750_dai;
 724         codec->num_dai = 1;
 725         codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
 726         codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
 727         if (codec->reg_cache == NULL)
 728                 return -ENOMEM;
 729
 730         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
 731         if (ret < 0) {
 732                 printk(KERN_ERR "wm8750: failed to set cache I/O: %d\n", ret);
 733                 goto err;
 734         }
 735
 736         ret = wm8750_reset(codec);
 737         if (ret < 0) {
 738                 printk(KERN_ERR "wm8750: failed to reset: %d\n", ret);
 739                 goto err;
 740         }
 741
 742         /* register pcms */
 743         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 744         if (ret < 0) {
 745                 printk(KERN_ERR "wm8750: failed to create pcms\n");
 746                 goto err;
 747         }
 748
 749         /* charge output caps */
 750         wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 751         codec->bias_level = SND_SOC_BIAS_STANDBY;
 752         schedule_delayed_work(&codec->delayed_work, msecs_to_jiffies(1000));
 753
 754         /* set the update bits */
 755         reg = snd_soc_read(codec, WM8750_LDAC);
 756         snd_soc_write(codec, WM8750_LDAC, reg | 0x0100);
 757         reg = snd_soc_read(codec, WM8750_RDAC);
 758         snd_soc_write(codec, WM8750_RDAC, reg | 0x0100);
 759         reg = snd_soc_read(codec, WM8750_LOUT1V);
 760         snd_soc_write(codec, WM8750_LOUT1V, reg | 0x0100);
 761         reg = snd_soc_read(codec, WM8750_ROUT1V);
 762         snd_soc_write(codec, WM8750_ROUT1V, reg | 0x0100);
 763         reg = snd_soc_read(codec, WM8750_LOUT2V);
 764         snd_soc_write(codec, WM8750_LOUT2V, reg | 0x0100);
 765         reg = snd_soc_read(codec, WM8750_ROUT2V);
 766         snd_soc_write(codec, WM8750_ROUT2V, reg | 0x0100);
 767         reg = snd_soc_read(codec, WM8750_LINVOL);
 768         snd_soc_write(codec, WM8750_LINVOL, reg | 0x0100);
 769         reg = snd_soc_read(codec, WM8750_RINVOL);
 770         snd_soc_write(codec, WM8750_RINVOL, reg | 0x0100);
 771
 772         snd_soc_add_controls(codec, wm8750_snd_controls,
 773                                 ARRAY_SIZE(wm8750_snd_controls));
 774         wm8750_add_widgets(codec);
 775         ret = snd_soc_init_card(socdev);
 776         if (ret < 0) {
 777                 printk(KERN_ERR "wm8750: failed to register card\n");
 778                 goto card_err;
 779         }
 780         return ret;
 781
 782 card_err:
 783         snd_soc_free_pcms(socdev);
 784         snd_soc_dapm_free(socdev);
 785 err:
 786         kfree(codec->reg_cache);
 787         return ret;
 788 }
 789
 790 /* If the i2c layer weren't so broken, we could pass this kind of data
 791    around */
 792 static struct snd_soc_device *wm8750_socdev;
 793
 794 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 795
 796 /*
 797  * WM8750 2 wire address is determined by GPIO5
 798  * state during powerup.
 799  *    low  = 0x1a
 800  *    high = 0x1b
 801  */
 802
 803 static int wm8750_i2c_probe(struct i2c_client *i2c,
 804                             const struct i2c_device_id *id)
 805 {
 806         struct snd_soc_device *socdev = wm8750_socdev;
 807         struct snd_soc_codec *codec = socdev->card->codec;
 808         int ret;
 809
 810         i2c_set_clientdata(i2c, codec);
 811         codec->control_data = i2c;
 812
 813         ret = wm8750_init(socdev, SND_SOC_I2C);
 814         if (ret < 0)
 815                 pr_err("failed to initialise WM8750\n");
 816
 817         return ret;
 818 }
 819
 820 static int wm8750_i2c_remove(struct i2c_client *client)
 821 {
 822         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 823         kfree(codec->reg_cache);
 824         return 0;
 825 }
 826
 827 static const struct i2c_device_id wm8750_i2c_id[] = {
 828         { "wm8750", 0 },
 829         { }
 830 };
 831 MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
 832
 833 static struct i2c_driver wm8750_i2c_driver = {
 834         .driver = {
 835                 .name = "WM8750 I2C Codec",
 836                 .owner = THIS_MODULE,
 837         },
 838         .probe =    wm8750_i2c_probe,
 839         .remove =   wm8750_i2c_remove,
 840         .id_table = wm8750_i2c_id,
 841 };
 842
 843 static int wm8750_add_i2c_device(struct platform_device *pdev,
 844                                  const struct wm8750_setup_data *setup)
 845 {
 846         struct i2c_board_info info;
 847         struct i2c_adapter *adapter;
 848         struct i2c_client *client;
 849         int ret;
 850
 851         ret = i2c_add_driver(&wm8750_i2c_driver);
 852         if (ret != 0) {
 853                 dev_err(&pdev->dev, "can't add i2c driver\n");
 854                 return ret;
 855         }
 856
 857         memset(&info, 0, sizeof(struct i2c_board_info));
 858         info.addr = setup->i2c_address;
 859         strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
 860
 861         adapter = i2c_get_adapter(setup->i2c_bus);
 862         if (!adapter) {
 863                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 864                         setup->i2c_bus);
 865                 goto err_driver;
 866         }
 867
 868         client = i2c_new_device(adapter, &info);
 869         i2c_put_adapter(adapter);
 870         if (!client) {
 871                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 872                         (unsigned int)info.addr);
 873                 goto err_driver;
 874         }
 875
 876         return 0;
 877
 878 err_driver:
 879         i2c_del_driver(&wm8750_i2c_driver);
 880         return -ENODEV;
 881 }
 882 #endif
 883
 884 #if defined(CONFIG_SPI_MASTER)
 885 static int __devinit wm8750_spi_probe(struct spi_device *spi)
 886 {
 887         struct snd_soc_device *socdev = wm8750_socdev;
 888         struct snd_soc_codec *codec = socdev->card->codec;
 889         int ret;
 890
 891         codec->control_data = spi;
 892
 893         ret = wm8750_init(socdev, SND_SOC_SPI);
 894         if (ret < 0)
 895                 dev_err(&spi->dev, "failed to initialise WM8750\n");
 896
 897         return ret;
 898 }
 899
 900 static int __devexit wm8750_spi_remove(struct spi_device *spi)
 901 {
 902         return 0;
 903 }
 904
 905 static struct spi_driver wm8750_spi_driver = {
 906         .driver = {
 907                 .name   = "wm8750",
 908                 .bus    = &spi_bus_type,
 909                 .owner  = THIS_MODULE,
 910         },
 911         .probe          = wm8750_spi_probe,
 912         .remove         = __devexit_p(wm8750_spi_remove),
 913 };
 914 #endif
 915
 916 static int wm8750_probe(struct platform_device *pdev)
 917 {
 918         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 919         struct wm8750_setup_data *setup = socdev->codec_data;
 920         struct snd_soc_codec *codec;
 921         struct wm8750_priv *wm8750;
 922         int ret;
 923
 924         pr_info("WM8750 Audio Codec %s", WM8750_VERSION);
 925         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 926         if (codec == NULL)
 927                 return -ENOMEM;
 928
 929         wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
 930         if (wm8750 == NULL) {
 931                 kfree(codec);
 932                 return -ENOMEM;
 933         }
 934
 935         codec->private_data = wm8750;
 936         socdev->card->codec = codec;
 937         mutex_init(&codec->mutex);
 938         INIT_LIST_HEAD(&codec->dapm_widgets);
 939         INIT_LIST_HEAD(&codec->dapm_paths);
 940         wm8750_socdev = socdev;
 941         INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
 942
 943         ret = -ENODEV;
 944
 945 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 946         if (setup->i2c_address) {
 947                 ret = wm8750_add_i2c_device(pdev, setup);
 948         }
 949 #endif
 950 #if defined(CONFIG_SPI_MASTER)
 951         if (setup->spi) {
 952                 ret = spi_register_driver(&wm8750_spi_driver);
 953                 if (ret != 0)
 954                         printk(KERN_ERR "can't add spi driver");
 955         }
 956 #endif
 957
 958         if (ret != 0) {
 959                 kfree(codec->private_data);
 960                 kfree(codec);
 961         }
 962         return ret;
 963 }
 964
 965 /*
 966  * This function forces any delayed work to be queued and run.
 967  */
 968 static int run_delayed_work(struct delayed_work *dwork)
 969 {
 970         int ret;
 971
 972         /* cancel any work waiting to be queued. */
 973         ret = cancel_delayed_work(dwork);
 974
 975         /* if there was any work waiting then we run it now and
 976          * wait for it's completion */
 977         if (ret) {
 978                 schedule_delayed_work(dwork, 0);
 979                 flush_scheduled_work();
 980         }
 981         return ret;
 982 }
 983
 984 /* power down chip */
 985 static int wm8750_remove(struct platform_device *pdev)
 986 {
 987         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 988         struct snd_soc_codec *codec = socdev->card->codec;
 989
 990         if (codec->control_data)
 991                 wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
 992         run_delayed_work(&codec->delayed_work);
 993         snd_soc_free_pcms(socdev);
 994         snd_soc_dapm_free(socdev);
 995 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 996         i2c_unregister_device(codec->control_data);
 997         i2c_del_driver(&wm8750_i2c_driver);
 998 #endif
 999 #if defined(CONFIG_SPI_MASTER)
1000         spi_unregister_driver(&wm8750_spi_driver);
1001 #endif
1002         kfree(codec->private_data);
1003         kfree(codec);
1004
1005         return 0;
1006 }
1007
1008 struct snd_soc_codec_device soc_codec_dev_wm8750 = {
1009         .probe =        wm8750_probe,
1010         .remove =       wm8750_remove,
1011         .suspend =      wm8750_suspend,
1012         .resume =       wm8750_resume,
1013 };
1014 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
1015
1016 static int __init wm8750_modinit(void)
1017 {
1018         return snd_soc_register_dai(&wm8750_dai);
1019 }
1020 module_init(wm8750_modinit);
1021
1022 static void __exit wm8750_exit(void)
1023 {
1024         snd_soc_unregister_dai(&wm8750_dai);
1025 }
1026 module_exit(wm8750_exit);
1027
1028 MODULE_DESCRIPTION("ASoC WM8750 driver");
1029 MODULE_AUTHOR("Liam Girdwood");
1030 MODULE_LICENSE("GPL");