include/sound/soc.h

   1 /*
   2  * linux/sound/soc.h -- ALSA SoC Layer
   3  *
   4  * Author:              Liam Girdwood
   5  * Created:             Aug 11th 2005
   6  * Copyright:   Wolfson Microelectronics. PLC.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef __LINUX_SND_SOC_H
  14 #define __LINUX_SND_SOC_H
  15
  16 #include <linux/platform_device.h>
  17 #include <linux/types.h>
  18 #include <linux/workqueue.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/kernel.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/control.h>
  24 #include <sound/ac97_codec.h>
  25
  26 /*
  27  * Convenience kcontrol builders
  28  */
  29 #define SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) \
  30         ((unsigned long)&(struct soc_mixer_control) \
  31         {.reg = xreg, .shift = xshift, .rshift = xshift, .max = xmax, \
  32         .invert = xinvert})
  33 #define SOC_SINGLE_VALUE_EXT(xreg, xmax, xinvert) \
  34         ((unsigned long)&(struct soc_mixer_control) \
  35         {.reg = xreg, .max = xmax, .invert = xinvert})
  36 #define SOC_SINGLE(xname, reg, shift, max, invert) \
  37 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  38         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
  39         .put = snd_soc_put_volsw, \
  40         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
  41 #define SOC_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
  42 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  43         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  44                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  45         .tlv.p = (tlv_array), \
  46         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
  47         .put = snd_soc_put_volsw, \
  48         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
  49 #define SOC_DOUBLE(xname, xreg, shift_left, shift_right, xmax, xinvert) \
  50 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  51         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
  52         .put = snd_soc_put_volsw, \
  53         .private_value = (unsigned long)&(struct soc_mixer_control) \
  54                 {.reg = xreg, .shift = shift_left, .rshift = shift_right, \
  55                  .max = xmax, .invert = xinvert} }
  56 #define SOC_DOUBLE_R(xname, reg_left, reg_right, xshift, xmax, xinvert) \
  57 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  58         .info = snd_soc_info_volsw_2r, \
  59         .get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
  60         .private_value = (unsigned long)&(struct soc_mixer_control) \
  61                 {.reg = reg_left, .rreg = reg_right, .shift = xshift, \
  62                 .max = xmax, .invert = xinvert} }
  63 #define SOC_DOUBLE_TLV(xname, xreg, shift_left, shift_right, xmax, xinvert, tlv_array) \
  64 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  65         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  66                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  67         .tlv.p = (tlv_array), \
  68         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
  69         .put = snd_soc_put_volsw, \
  70         .private_value = (unsigned long)&(struct soc_mixer_control) \
  71                 {.reg = xreg, .shift = shift_left, .rshift = shift_right,\
  72                  .max = xmax, .invert = xinvert} }
  73 #define SOC_DOUBLE_R_TLV(xname, reg_left, reg_right, xshift, xmax, xinvert, tlv_array) \
  74 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  75         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  76                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  77         .tlv.p = (tlv_array), \
  78         .info = snd_soc_info_volsw_2r, \
  79         .get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
  80         .private_value = (unsigned long)&(struct soc_mixer_control) \
  81                 {.reg = reg_left, .rreg = reg_right, .shift = xshift, \
  82                 .max = xmax, .invert = xinvert} }
  83 #define SOC_DOUBLE_S8_TLV(xname, xreg, xmin, xmax, tlv_array) \
  84 {       .iface  = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  85         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
  86                   SNDRV_CTL_ELEM_ACCESS_READWRITE, \
  87         .tlv.p  = (tlv_array), \
  88         .info   = snd_soc_info_volsw_s8, .get = snd_soc_get_volsw_s8, \
  89         .put    = snd_soc_put_volsw_s8, \
  90         .private_value = (unsigned long)&(struct soc_mixer_control) \
  91                 {.reg = xreg, .min = xmin, .max = xmax} }
  92 #define SOC_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmax, xtexts) \
  93 {       .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
  94         .max = xmax, .texts = xtexts }
  95 #define SOC_ENUM_SINGLE(xreg, xshift, xmax, xtexts) \
  96         SOC_ENUM_DOUBLE(xreg, xshift, xshift, xmax, xtexts)
  97 #define SOC_ENUM_SINGLE_EXT(xmax, xtexts) \
  98 {       .max = xmax, .texts = xtexts }
  99 #define SOC_VALUE_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmask, xmax, xtexts, xvalues) \
 100 {       .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
 101         .mask = xmask, .max = xmax, .texts = xtexts, .values = xvalues}
 102 #define SOC_VALUE_ENUM_SINGLE(xreg, xshift, xmask, xmax, xtexts, xvalues) \
 103         SOC_VALUE_ENUM_DOUBLE(xreg, xshift, xshift, xmask, xmax, xtexts, xvalues)
 104 #define SOC_ENUM(xname, xenum) \
 105 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,\
 106         .info = snd_soc_info_enum_double, \
 107         .get = snd_soc_get_enum_double, .put = snd_soc_put_enum_double, \
 108         .private_value = (unsigned long)&xenum }
 109 #define SOC_VALUE_ENUM(xname, xenum) \
 110 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,\
 111         .info = snd_soc_info_enum_double, \
 112         .get = snd_soc_get_value_enum_double, \
 113         .put = snd_soc_put_value_enum_double, \
 114         .private_value = (unsigned long)&xenum }
 115 #define SOC_SINGLE_EXT(xname, xreg, xshift, xmax, xinvert,\
 116          xhandler_get, xhandler_put) \
 117 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 118         .info = snd_soc_info_volsw, \
 119         .get = xhandler_get, .put = xhandler_put, \
 120         .private_value = SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) }
 121 #define SOC_DOUBLE_EXT(xname, xreg, shift_left, shift_right, xmax, xinvert,\
 122          xhandler_get, xhandler_put) \
 123 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
 124         .info = snd_soc_info_volsw, \
 125         .get = xhandler_get, .put = xhandler_put, \
 126         .private_value = (unsigned long)&(struct soc_mixer_control) \
 127                 {.reg = xreg, .shift = shift_left, .rshift = shift_right, \
 128                  .max = xmax, .invert = xinvert} }
 129 #define SOC_SINGLE_EXT_TLV(xname, xreg, xshift, xmax, xinvert,\
 130          xhandler_get, xhandler_put, tlv_array) \
 131 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 132         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
 133                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 134         .tlv.p = (tlv_array), \
 135         .info = snd_soc_info_volsw, \
 136         .get = xhandler_get, .put = xhandler_put, \
 137         .private_value = SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) }
 138 #define SOC_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) \
 139 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 140         .info = snd_soc_info_bool_ext, \
 141         .get = xhandler_get, .put = xhandler_put, \
 142         .private_value = xdata }
 143 #define SOC_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put) \
 144 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 145         .info = snd_soc_info_enum_ext, \
 146         .get = xhandler_get, .put = xhandler_put, \
 147         .private_value = (unsigned long)&xenum }
 148
 149 /*
 150  * Bias levels
 151  *
 152  * @ON:      Bias is fully on for audio playback and capture operations.
 153  * @PREPARE: Prepare for audio operations. Called before DAPM switching for
 154  *           stream start and stop operations.
 155  * @STANDBY: Low power standby state when no playback/capture operations are
 156  *           in progress. NOTE: The transition time between STANDBY and ON
 157  *           should be as fast as possible and no longer than 10ms.
 158  * @OFF:     Power Off. No restrictions on transition times.
 159  */
 160 enum snd_soc_bias_level {
 161         SND_SOC_BIAS_ON,
 162         SND_SOC_BIAS_PREPARE,
 163         SND_SOC_BIAS_STANDBY,
 164         SND_SOC_BIAS_OFF,
 165 };
 166
 167 struct snd_jack;
 168 struct snd_soc_card;
 169 struct snd_soc_device;
 170 struct snd_soc_pcm_stream;
 171 struct snd_soc_ops;
 172 struct snd_soc_dai_mode;
 173 struct snd_soc_pcm_runtime;
 174 struct snd_soc_dai;
 175 struct snd_soc_platform;
 176 struct snd_soc_codec;
 177 struct soc_enum;
 178 struct snd_soc_ac97_ops;
 179 struct snd_soc_jack;
 180 struct snd_soc_jack_pin;
 181 #ifdef CONFIG_GPIOLIB
 182 struct snd_soc_jack_gpio;
 183 #endif
 184
 185 typedef int (*hw_write_t)(void *,const char* ,int);
 186 typedef int (*hw_read_t)(void *,char* ,int);
 187
 188 extern struct snd_ac97_bus_ops soc_ac97_ops;
 189
 190 int snd_soc_register_platform(struct snd_soc_platform *platform);
 191 void snd_soc_unregister_platform(struct snd_soc_platform *platform);
 192 int snd_soc_register_codec(struct snd_soc_codec *codec);
 193 void snd_soc_unregister_codec(struct snd_soc_codec *codec);
 194 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg);
 195 int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
 196                                int addr_bits, int data_bits);
 197
 198 #ifdef CONFIG_PM
 199 int snd_soc_suspend_device(struct device *dev);
 200 int snd_soc_resume_device(struct device *dev);
 201 #endif
 202
 203 /* pcm <-> DAI connect */
 204 void snd_soc_free_pcms(struct snd_soc_device *socdev);
 205 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid);
 206 int snd_soc_init_card(struct snd_soc_device *socdev);
 207
 208 /* set runtime hw params */
 209 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 210         const struct snd_pcm_hardware *hw);
 211
 212 /* Jack reporting */
 213 int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type,
 214                      struct snd_soc_jack *jack);
 215 void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask);
 216 int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
 217                           struct snd_soc_jack_pin *pins);
 218 #ifdef CONFIG_GPIOLIB
 219 int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
 220                         struct snd_soc_jack_gpio *gpios);
 221 void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
 222                         struct snd_soc_jack_gpio *gpios);
 223 #endif
 224
 225 /* codec register bit access */
 226 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
 227                                 unsigned int mask, unsigned int value);
 228 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
 229                                 unsigned int mask, unsigned int value);
 230
 231 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
 232         struct snd_ac97_bus_ops *ops, int num);
 233 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
 234
 235 /*
 236  *Controls
 237  */
 238 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
 239         void *data, char *long_name);
 240 int snd_soc_add_controls(struct snd_soc_codec *codec,
 241         const struct snd_kcontrol_new *controls, int num_controls);
 242 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
 243         struct snd_ctl_elem_info *uinfo);
 244 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
 245         struct snd_ctl_elem_info *uinfo);
 246 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
 247         struct snd_ctl_elem_value *ucontrol);
 248 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
 249         struct snd_ctl_elem_value *ucontrol);
 250 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
 251         struct snd_ctl_elem_value *ucontrol);
 252 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
 253         struct snd_ctl_elem_value *ucontrol);
 254 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
 255         struct snd_ctl_elem_info *uinfo);
 256 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
 257         struct snd_ctl_elem_info *uinfo);
 258 #define snd_soc_info_bool_ext           snd_ctl_boolean_mono_info
 259 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
 260         struct snd_ctl_elem_value *ucontrol);
 261 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
 262         struct snd_ctl_elem_value *ucontrol);
 263 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
 264         struct snd_ctl_elem_info *uinfo);
 265 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
 266         struct snd_ctl_elem_value *ucontrol);
 267 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
 268         struct snd_ctl_elem_value *ucontrol);
 269 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
 270         struct snd_ctl_elem_info *uinfo);
 271 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
 272         struct snd_ctl_elem_value *ucontrol);
 273 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
 274         struct snd_ctl_elem_value *ucontrol);
 275
 276 /**
 277  * struct snd_soc_jack_pin - Describes a pin to update based on jack detection
 278  *
 279  * @pin:    name of the pin to update
 280  * @mask:   bits to check for in reported jack status
 281  * @invert: if non-zero then pin is enabled when status is not reported
 282  */
 283 struct snd_soc_jack_pin {
 284         struct list_head list;
 285         const char *pin;
 286         int mask;
 287         bool invert;
 288 };
 289
 290 /**
 291  * struct snd_soc_jack_gpio - Describes a gpio pin for jack detection
 292  *
 293  * @gpio:         gpio number
 294  * @name:         gpio name
 295  * @report:       value to report when jack detected
 296  * @invert:       report presence in low state
 297  * @debouce_time: debouce time in ms
 298  */
 299 #ifdef CONFIG_GPIOLIB
 300 struct snd_soc_jack_gpio {
 301         unsigned int gpio;
 302         const char *name;
 303         int report;
 304         int invert;
 305         int debounce_time;
 306         struct snd_soc_jack *jack;
 307         struct work_struct work;
 308 };
 309 #endif
 310
 311 struct snd_soc_jack {
 312         struct snd_jack *jack;
 313         struct snd_soc_card *card;
 314         struct list_head pins;
 315         int status;
 316 };
 317
 318 /* SoC PCM stream information */
 319 struct snd_soc_pcm_stream {
 320         char *stream_name;
 321         u64 formats;                    /* SNDRV_PCM_FMTBIT_* */
 322         unsigned int rates;             /* SNDRV_PCM_RATE_* */
 323         unsigned int rate_min;          /* min rate */
 324         unsigned int rate_max;          /* max rate */
 325         unsigned int channels_min;      /* min channels */
 326         unsigned int channels_max;      /* max channels */
 327         unsigned int active:1;          /* stream is in use */
 328 };
 329
 330 /* SoC audio ops */
 331 struct snd_soc_ops {
 332         int (*startup)(struct snd_pcm_substream *);
 333         void (*shutdown)(struct snd_pcm_substream *);
 334         int (*hw_params)(struct snd_pcm_substream *, struct snd_pcm_hw_params *);
 335         int (*hw_free)(struct snd_pcm_substream *);
 336         int (*prepare)(struct snd_pcm_substream *);
 337         int (*trigger)(struct snd_pcm_substream *, int);
 338 };
 339
 340 /* SoC Audio Codec */
 341 struct snd_soc_codec {
 342         char *name;
 343         struct module *owner;
 344         struct mutex mutex;
 345         struct device *dev;
 346         struct snd_soc_device *socdev;
 347
 348         struct list_head list;
 349
 350         /* callbacks */
 351         int (*set_bias_level)(struct snd_soc_codec *,
 352                               enum snd_soc_bias_level level);
 353
 354         /* runtime */
 355         struct snd_card *card;
 356         struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */
 357         unsigned int active;
 358         unsigned int pcm_devs;
 359         void *private_data;
 360
 361         /* codec IO */
 362         void *control_data; /* codec control (i2c/3wire) data */
 363         unsigned int (*read)(struct snd_soc_codec *, unsigned int);
 364         int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
 365         int (*display_register)(struct snd_soc_codec *, char *,
 366                                 size_t, unsigned int);
 367         int (*volatile_register)(unsigned int);
 368         hw_write_t hw_write;
 369         hw_read_t hw_read;
 370         void *reg_cache;
 371         short reg_cache_size;
 372         short reg_cache_step;
 373
 374         /* dapm */
 375         u32 pop_time;
 376         struct list_head dapm_widgets;
 377         struct list_head dapm_paths;
 378         enum snd_soc_bias_level bias_level;
 379         enum snd_soc_bias_level suspend_bias_level;
 380         struct delayed_work delayed_work;
 381
 382         /* codec DAI's */
 383         struct snd_soc_dai *dai;
 384         unsigned int num_dai;
 385
 386 #ifdef CONFIG_DEBUG_FS
 387         struct dentry *debugfs_reg;
 388         struct dentry *debugfs_pop_time;
 389 #endif
 390 };
 391
 392 /* codec device */
 393 struct snd_soc_codec_device {
 394         int (*probe)(struct platform_device *pdev);
 395         int (*remove)(struct platform_device *pdev);
 396         int (*suspend)(struct platform_device *pdev, pm_message_t state);
 397         int (*resume)(struct platform_device *pdev);
 398 };
 399
 400 /* SoC platform interface */
 401 struct snd_soc_platform {
 402         char *name;
 403         struct list_head list;
 404
 405         int (*probe)(struct platform_device *pdev);
 406         int (*remove)(struct platform_device *pdev);
 407         int (*suspend)(struct snd_soc_dai *dai);
 408         int (*resume)(struct snd_soc_dai *dai);
 409
 410         /* pcm creation and destruction */
 411         int (*pcm_new)(struct snd_card *, struct snd_soc_dai *,
 412                 struct snd_pcm *);
 413         void (*pcm_free)(struct snd_pcm *);
 414
 415         /* platform stream ops */
 416         struct snd_pcm_ops *pcm_ops;
 417 };
 418
 419 /* SoC machine DAI configuration, glues a codec and cpu DAI together */
 420 struct snd_soc_dai_link  {
 421         char *name;                     /* Codec name */
 422         char *stream_name;              /* Stream name */
 423
 424         /* DAI */
 425         struct snd_soc_dai *codec_dai;
 426         struct snd_soc_dai *cpu_dai;
 427
 428         /* machine stream operations */
 429         struct snd_soc_ops *ops;
 430
 431         /* codec/machine specific init - e.g. add machine controls */
 432         int (*init)(struct snd_soc_codec *codec);
 433
 434         /* Symmetry requirements */
 435         unsigned int symmetric_rates:1;
 436
 437         /* Symmetry data - only valid if symmetry is being enforced */
 438         unsigned int rate;
 439
 440         /* DAI pcm */
 441         struct snd_pcm *pcm;
 442 };
 443
 444 /* SoC card */
 445 struct snd_soc_card {
 446         char *name;
 447         struct device *dev;
 448
 449         struct list_head list;
 450
 451         int instantiated;
 452
 453         int (*probe)(struct platform_device *pdev);
 454         int (*remove)(struct platform_device *pdev);
 455
 456         /* the pre and post PM functions are used to do any PM work before and
 457          * after the codec and DAI's do any PM work. */
 458         int (*suspend_pre)(struct platform_device *pdev, pm_message_t state);
 459         int (*suspend_post)(struct platform_device *pdev, pm_message_t state);
 460         int (*resume_pre)(struct platform_device *pdev);
 461         int (*resume_post)(struct platform_device *pdev);
 462
 463         /* callbacks */
 464         int (*set_bias_level)(struct snd_soc_card *,
 465                               enum snd_soc_bias_level level);
 466
 467         /* CPU <--> Codec DAI links  */
 468         struct snd_soc_dai_link *dai_link;
 469         int num_links;
 470
 471         struct snd_soc_device *socdev;
 472
 473         struct snd_soc_codec *codec;
 474
 475         struct snd_soc_platform *platform;
 476         struct delayed_work delayed_work;
 477         struct work_struct deferred_resume_work;
 478 };
 479
 480 /* SoC Device - the audio subsystem */
 481 struct snd_soc_device {
 482         struct device *dev;
 483         struct snd_soc_card *card;
 484         struct snd_soc_codec_device *codec_dev;
 485         void *codec_data;
 486 };
 487
 488 /* runtime channel data */
 489 struct snd_soc_pcm_runtime {
 490         struct snd_soc_dai_link *dai;
 491         struct snd_soc_device *socdev;
 492 };
 493
 494 /* mixer control */
 495 struct soc_mixer_control {
 496         int min, max;
 497         unsigned int reg, rreg, shift, rshift, invert;
 498 };
 499
 500 /* enumerated kcontrol */
 501 struct soc_enum {
 502         unsigned short reg;
 503         unsigned short reg2;
 504         unsigned char shift_l;
 505         unsigned char shift_r;
 506         unsigned int max;
 507         unsigned int mask;
 508         const char **texts;
 509         const unsigned int *values;
 510         void *dapm;
 511 };
 512
 513 /* codec IO */
 514 static inline unsigned int snd_soc_read(struct snd_soc_codec *codec,
 515                                         unsigned int reg)
 516 {
 517         return codec->read(codec, reg);
 518 }
 519
 520 static inline unsigned int snd_soc_write(struct snd_soc_codec *codec,
 521                                          unsigned int reg, unsigned int val)
 522 {
 523         return codec->write(codec, reg, val);
 524 }
 525
 526 #include <sound/soc-dai.h>
 527
 528 #endif