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
 195 /* pcm <-> DAI connect */
 196 void snd_soc_free_pcms(struct snd_soc_device *socdev);
 197 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid);
 198 int snd_soc_init_card(struct snd_soc_device *socdev);
 199
 200 /* set runtime hw params */
 201 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 202         const struct snd_pcm_hardware *hw);
 203
 204 /* Jack reporting */
 205 int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type,
 206                      struct snd_soc_jack *jack);
 207 void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask);
 208 int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
 209                           struct snd_soc_jack_pin *pins);
 210 #ifdef CONFIG_GPIOLIB
 211 int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
 212                         struct snd_soc_jack_gpio *gpios);
 213 void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
 214                         struct snd_soc_jack_gpio *gpios);
 215 #endif
 216
 217 /* codec register bit access */
 218 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
 219                                 unsigned short mask, unsigned short value);
 220 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
 221                                 unsigned short mask, unsigned short value);
 222
 223 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
 224         struct snd_ac97_bus_ops *ops, int num);
 225 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
 226
 227 /*
 228  *Controls
 229  */
 230 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
 231         void *data, char *long_name);
 232 int snd_soc_add_controls(struct snd_soc_codec *codec,
 233         const struct snd_kcontrol_new *controls, int num_controls);
 234 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
 235         struct snd_ctl_elem_info *uinfo);
 236 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
 237         struct snd_ctl_elem_info *uinfo);
 238 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
 239         struct snd_ctl_elem_value *ucontrol);
 240 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
 241         struct snd_ctl_elem_value *ucontrol);
 242 int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
 243         struct snd_ctl_elem_value *ucontrol);
 244 int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
 245         struct snd_ctl_elem_value *ucontrol);
 246 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
 247         struct snd_ctl_elem_info *uinfo);
 248 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
 249         struct snd_ctl_elem_info *uinfo);
 250 #define snd_soc_info_bool_ext           snd_ctl_boolean_mono_info
 251 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
 252         struct snd_ctl_elem_value *ucontrol);
 253 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
 254         struct snd_ctl_elem_value *ucontrol);
 255 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
 256         struct snd_ctl_elem_info *uinfo);
 257 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
 258         struct snd_ctl_elem_value *ucontrol);
 259 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
 260         struct snd_ctl_elem_value *ucontrol);
 261 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
 262         struct snd_ctl_elem_info *uinfo);
 263 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
 264         struct snd_ctl_elem_value *ucontrol);
 265 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
 266         struct snd_ctl_elem_value *ucontrol);
 267
 268 /**
 269  * struct snd_soc_jack_pin - Describes a pin to update based on jack detection
 270  *
 271  * @pin:    name of the pin to update
 272  * @mask:   bits to check for in reported jack status
 273  * @invert: if non-zero then pin is enabled when status is not reported
 274  */
 275 struct snd_soc_jack_pin {
 276         struct list_head list;
 277         const char *pin;
 278         int mask;
 279         bool invert;
 280 };
 281
 282 /**
 283  * struct snd_soc_jack_gpio - Describes a gpio pin for jack detection
 284  *
 285  * @gpio:         gpio number
 286  * @name:         gpio name
 287  * @report:       value to report when jack detected
 288  * @invert:       report presence in low state
 289  * @debouce_time: debouce time in ms
 290  */
 291 #ifdef CONFIG_GPIOLIB
 292 struct snd_soc_jack_gpio {
 293         unsigned int gpio;
 294         const char *name;
 295         int report;
 296         int invert;
 297         int debounce_time;
 298         struct snd_soc_jack *jack;
 299         struct work_struct work;
 300 };
 301 #endif
 302
 303 struct snd_soc_jack {
 304         struct snd_jack *jack;
 305         struct snd_soc_card *card;
 306         struct list_head pins;
 307         int status;
 308 };
 309
 310 /* SoC PCM stream information */
 311 struct snd_soc_pcm_stream {
 312         char *stream_name;
 313         u64 formats;                    /* SNDRV_PCM_FMTBIT_* */
 314         unsigned int rates;             /* SNDRV_PCM_RATE_* */
 315         unsigned int rate_min;          /* min rate */
 316         unsigned int rate_max;          /* max rate */
 317         unsigned int channels_min;      /* min channels */
 318         unsigned int channels_max;      /* max channels */
 319         unsigned int active:1;          /* stream is in use */
 320 };
 321
 322 /* SoC audio ops */
 323 struct snd_soc_ops {
 324         int (*startup)(struct snd_pcm_substream *);
 325         void (*shutdown)(struct snd_pcm_substream *);
 326         int (*hw_params)(struct snd_pcm_substream *, struct snd_pcm_hw_params *);
 327         int (*hw_free)(struct snd_pcm_substream *);
 328         int (*prepare)(struct snd_pcm_substream *);
 329         int (*trigger)(struct snd_pcm_substream *, int);
 330 };
 331
 332 /* SoC Audio Codec */
 333 struct snd_soc_codec {
 334         char *name;
 335         struct module *owner;
 336         struct mutex mutex;
 337         struct device *dev;
 338         struct snd_soc_device *socdev;
 339
 340         struct list_head list;
 341
 342         /* callbacks */
 343         int (*set_bias_level)(struct snd_soc_codec *,
 344                               enum snd_soc_bias_level level);
 345
 346         /* runtime */
 347         struct snd_card *card;
 348         struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */
 349         unsigned int active;
 350         unsigned int pcm_devs;
 351         void *private_data;
 352
 353         /* codec IO */
 354         void *control_data; /* codec control (i2c/3wire) data */
 355         unsigned int (*read)(struct snd_soc_codec *, unsigned int);
 356         int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
 357         int (*display_register)(struct snd_soc_codec *, char *,
 358                                 size_t, unsigned int);
 359         hw_write_t hw_write;
 360         hw_read_t hw_read;
 361         void *reg_cache;
 362         short reg_cache_size;
 363         short reg_cache_step;
 364
 365         /* dapm */
 366         u32 pop_time;
 367         struct list_head dapm_widgets;
 368         struct list_head dapm_paths;
 369         enum snd_soc_bias_level bias_level;
 370         enum snd_soc_bias_level suspend_bias_level;
 371         struct delayed_work delayed_work;
 372         struct list_head up_list;
 373         struct list_head down_list;
 374
 375         /* codec DAI's */
 376         struct snd_soc_dai *dai;
 377         unsigned int num_dai;
 378
 379 #ifdef CONFIG_DEBUG_FS
 380         struct dentry *debugfs_reg;
 381         struct dentry *debugfs_pop_time;
 382 #endif
 383 };
 384
 385 /* codec device */
 386 struct snd_soc_codec_device {
 387         int (*probe)(struct platform_device *pdev);
 388         int (*remove)(struct platform_device *pdev);
 389         int (*suspend)(struct platform_device *pdev, pm_message_t state);
 390         int (*resume)(struct platform_device *pdev);
 391 };
 392
 393 /* SoC platform interface */
 394 struct snd_soc_platform {
 395         char *name;
 396         struct list_head list;
 397
 398         int (*probe)(struct platform_device *pdev);
 399         int (*remove)(struct platform_device *pdev);
 400         int (*suspend)(struct snd_soc_dai *dai);
 401         int (*resume)(struct snd_soc_dai *dai);
 402
 403         /* pcm creation and destruction */
 404         int (*pcm_new)(struct snd_card *, struct snd_soc_dai *,
 405                 struct snd_pcm *);
 406         void (*pcm_free)(struct snd_pcm *);
 407
 408         /* platform stream ops */
 409         struct snd_pcm_ops *pcm_ops;
 410 };
 411
 412 /* SoC machine DAI configuration, glues a codec and cpu DAI together */
 413 struct snd_soc_dai_link  {
 414         char *name;                     /* Codec name */
 415         char *stream_name;              /* Stream name */
 416
 417         /* DAI */
 418         struct snd_soc_dai *codec_dai;
 419         struct snd_soc_dai *cpu_dai;
 420
 421         /* machine stream operations */
 422         struct snd_soc_ops *ops;
 423
 424         /* codec/machine specific init - e.g. add machine controls */
 425         int (*init)(struct snd_soc_codec *codec);
 426
 427         /* Symmetry requirements */
 428         unsigned int symmetric_rates:1;
 429
 430         /* Symmetry data - only valid if symmetry is being enforced */
 431         unsigned int rate;
 432
 433         /* DAI pcm */
 434         struct snd_pcm *pcm;
 435 };
 436
 437 /* SoC card */
 438 struct snd_soc_card {
 439         char *name;
 440         struct device *dev;
 441
 442         struct list_head list;
 443
 444         int instantiated;
 445
 446         int (*probe)(struct platform_device *pdev);
 447         int (*remove)(struct platform_device *pdev);
 448
 449         /* the pre and post PM functions are used to do any PM work before and
 450          * after the codec and DAI's do any PM work. */
 451         int (*suspend_pre)(struct platform_device *pdev, pm_message_t state);
 452         int (*suspend_post)(struct platform_device *pdev, pm_message_t state);
 453         int (*resume_pre)(struct platform_device *pdev);
 454         int (*resume_post)(struct platform_device *pdev);
 455
 456         /* callbacks */
 457         int (*set_bias_level)(struct snd_soc_card *,
 458                               enum snd_soc_bias_level level);
 459
 460         /* CPU <--> Codec DAI links  */
 461         struct snd_soc_dai_link *dai_link;
 462         int num_links;
 463
 464         struct snd_soc_device *socdev;
 465
 466         struct snd_soc_codec *codec;
 467
 468         struct snd_soc_platform *platform;
 469         struct delayed_work delayed_work;
 470         struct work_struct deferred_resume_work;
 471 };
 472
 473 /* SoC Device - the audio subsystem */
 474 struct snd_soc_device {
 475         struct device *dev;
 476         struct snd_soc_card *card;
 477         struct snd_soc_codec_device *codec_dev;
 478         void *codec_data;
 479 };
 480
 481 /* runtime channel data */
 482 struct snd_soc_pcm_runtime {
 483         struct snd_soc_dai_link *dai;
 484         struct snd_soc_device *socdev;
 485 };
 486
 487 /* mixer control */
 488 struct soc_mixer_control {
 489         int min, max;
 490         unsigned int reg, rreg, shift, rshift, invert;
 491 };
 492
 493 /* enumerated kcontrol */
 494 struct soc_enum {
 495         unsigned short reg;
 496         unsigned short reg2;
 497         unsigned char shift_l;
 498         unsigned char shift_r;
 499         unsigned int max;
 500         unsigned int mask;
 501         const char **texts;
 502         const unsigned int *values;
 503         void *dapm;
 504 };
 505
 506 /* codec IO */
 507 static inline unsigned int snd_soc_read(struct snd_soc_codec *codec,
 508                                         unsigned int reg)
 509 {
 510         return codec->read(codec, reg);
 511 }
 512
 513 static inline unsigned int snd_soc_write(struct snd_soc_codec *codec,
 514                                          unsigned int reg, unsigned int val)
 515 {
 516         return codec->write(codec, reg, val);
 517 }
 518
 519 #include <sound/soc-dai.h>
 520
 521 #endif