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 <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/control.h>
  22 #include <sound/ac97_codec.h>
  23
  24 #define SND_SOC_VERSION "0.13.2"
  25
  26 /*
  27  * Convenience kcontrol builders
  28  */
  29 #define SOC_SINGLE_VALUE(reg, shift, max, invert) ((reg) | ((shift) << 8) |\
  30         ((shift) << 12) | ((max) << 16) | ((invert) << 24))
  31 #define SOC_SINGLE_VALUE_EXT(reg, max, invert) ((reg) | ((max) << 16) |\
  32         ((invert) << 31))
  33 #define SOC_SINGLE(xname, reg, shift, max, invert) \
  34 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  35         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
  36         .put = snd_soc_put_volsw, \
  37         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
  38 #define SOC_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
  39 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  40         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  41                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  42         .tlv.p = (tlv_array), \
  43         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
  44         .put = snd_soc_put_volsw, \
  45         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
  46 #define SOC_DOUBLE(xname, reg, shift_left, shift_right, max, invert) \
  47 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  48         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
  49         .put = snd_soc_put_volsw, \
  50         .private_value = (reg) | ((shift_left) << 8) | \
  51                 ((shift_right) << 12) | ((max) << 16) | ((invert) << 24) }
  52 #define SOC_DOUBLE_R(xname, reg_left, reg_right, shift, max, invert) \
  53 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  54         .info = snd_soc_info_volsw_2r, \
  55         .get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
  56         .private_value = (reg_left) | ((shift) << 8)  | \
  57                 ((max) << 12) | ((invert) << 20) | ((reg_right) << 24) }
  58 #define SOC_DOUBLE_TLV(xname, reg, shift_left, shift_right, max, invert, tlv_array) \
  59 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  60         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  61                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  62         .tlv.p = (tlv_array), \
  63         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
  64         .put = snd_soc_put_volsw, \
  65         .private_value = (reg) | ((shift_left) << 8) | \
  66                 ((shift_right) << 12) | ((max) << 16) | ((invert) << 24) }
  67 #define SOC_DOUBLE_R_TLV(xname, reg_left, reg_right, shift, max, invert, tlv_array) \
  68 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  69         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  70                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  71         .tlv.p = (tlv_array), \
  72         .info = snd_soc_info_volsw_2r, \
  73         .get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
  74         .private_value = (reg_left) | ((shift) << 8)  | \
  75                 ((max) << 12) | ((invert) << 20) | ((reg_right) << 24) }
  76 #define SOC_DOUBLE_S8_TLV(xname, reg, min, max, tlv_array) \
  77 {       .iface  = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  78         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
  79                   SNDRV_CTL_ELEM_ACCESS_READWRITE, \
  80         .tlv.p  = (tlv_array), \
  81         .info   = snd_soc_info_volsw_s8, .get = snd_soc_get_volsw_s8, \
  82         .put    = snd_soc_put_volsw_s8, \
  83         .private_value = (reg) | (((signed char)max) << 16) | \
  84                          (((signed char)min) << 24) }
  85 #define SOC_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmask, xtexts) \
  86 {       .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
  87         .mask = xmask, .texts = xtexts }
  88 #define SOC_ENUM_SINGLE(xreg, xshift, xmask, xtexts) \
  89         SOC_ENUM_DOUBLE(xreg, xshift, xshift, xmask, xtexts)
  90 #define SOC_ENUM_SINGLE_EXT(xmask, xtexts) \
  91 {       .mask = xmask, .texts = xtexts }
  92 #define SOC_ENUM(xname, xenum) \
  93 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,\
  94         .info = snd_soc_info_enum_double, \
  95         .get = snd_soc_get_enum_double, .put = snd_soc_put_enum_double, \
  96         .private_value = (unsigned long)&xenum }
  97 #define SOC_SINGLE_EXT(xname, xreg, xshift, xmask, xinvert,\
  98          xhandler_get, xhandler_put) \
  99 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 100         .info = snd_soc_info_volsw, \
 101         .get = xhandler_get, .put = xhandler_put, \
 102         .private_value = SOC_SINGLE_VALUE(xreg, xshift, xmask, xinvert) }
 103 #define SOC_SINGLE_EXT_TLV(xname, xreg, xshift, xmask, xinvert,\
 104          xhandler_get, xhandler_put, tlv_array) \
 105 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 106         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
 107                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 108         .tlv.p = (tlv_array), \
 109         .info = snd_soc_info_volsw, \
 110         .get = xhandler_get, .put = xhandler_put, \
 111         .private_value = SOC_SINGLE_VALUE(xreg, xshift, xmask, xinvert) }
 112 #define SOC_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) \
 113 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 114         .info = snd_soc_info_bool_ext, \
 115         .get = xhandler_get, .put = xhandler_put, \
 116         .private_value = xdata }
 117 #define SOC_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put) \
 118 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 119         .info = snd_soc_info_enum_ext, \
 120         .get = xhandler_get, .put = xhandler_put, \
 121         .private_value = (unsigned long)&xenum }
 122
 123 /*
 124  * Bias levels
 125  *
 126  * @ON:      Bias is fully on for audio playback and capture operations.
 127  * @PREPARE: Prepare for audio operations. Called before DAPM switching for
 128  *           stream start and stop operations.
 129  * @STANDBY: Low power standby state when no playback/capture operations are
 130  *           in progress. NOTE: The transition time between STANDBY and ON
 131  *           should be as fast as possible and no longer than 10ms.
 132  * @OFF:     Power Off. No restrictions on transition times.
 133  */
 134 enum snd_soc_bias_level {
 135         SND_SOC_BIAS_ON,
 136         SND_SOC_BIAS_PREPARE,
 137         SND_SOC_BIAS_STANDBY,
 138         SND_SOC_BIAS_OFF,
 139 };
 140
 141 /*
 142  * Digital Audio Interface (DAI) types
 143  */
 144 #define SND_SOC_DAI_AC97        0x1
 145 #define SND_SOC_DAI_I2S         0x2
 146 #define SND_SOC_DAI_PCM         0x4
 147 #define SND_SOC_DAI_AC97_BUS    0x8     /* for custom i.e. non ac97_codec.c */
 148
 149 /*
 150  * DAI hardware audio formats
 151  */
 152 #define SND_SOC_DAIFMT_I2S              0       /* I2S mode */
 153 #define SND_SOC_DAIFMT_RIGHT_J  1       /* Right justified mode */
 154 #define SND_SOC_DAIFMT_LEFT_J   2       /* Left Justified mode */
 155 #define SND_SOC_DAIFMT_DSP_A    3       /* L data msb after FRM or LRC */
 156 #define SND_SOC_DAIFMT_DSP_B    4       /* L data msb during FRM or LRC */
 157 #define SND_SOC_DAIFMT_AC97             5       /* AC97 */
 158
 159 #define SND_SOC_DAIFMT_MSB      SND_SOC_DAIFMT_LEFT_J
 160 #define SND_SOC_DAIFMT_LSB      SND_SOC_DAIFMT_RIGHT_J
 161
 162 /*
 163  * DAI Gating
 164  */
 165 #define SND_SOC_DAIFMT_CONT                     (0 << 4)        /* continuous clock */
 166 #define SND_SOC_DAIFMT_GATED            (1 << 4)        /* clock is gated when not Tx/Rx */
 167
 168 /*
 169  * DAI Sync
 170  * Synchronous LR (Left Right) clocks and Frame signals.
 171  */
 172 #define SND_SOC_DAIFMT_SYNC             (0 << 5)        /* Tx FRM = Rx FRM */
 173 #define SND_SOC_DAIFMT_ASYNC            (1 << 5)        /* Tx FRM ~ Rx FRM */
 174
 175 /*
 176  * TDM
 177  */
 178 #define SND_SOC_DAIFMT_TDM              (1 << 6)
 179
 180 /*
 181  * DAI hardware signal inversions
 182  */
 183 #define SND_SOC_DAIFMT_NB_NF            (0 << 8)        /* normal bclk + frm */
 184 #define SND_SOC_DAIFMT_NB_IF            (1 << 8)        /* normal bclk + inv frm */
 185 #define SND_SOC_DAIFMT_IB_NF            (2 << 8)        /* invert bclk + nor frm */
 186 #define SND_SOC_DAIFMT_IB_IF            (3 << 8)        /* invert bclk + frm */
 187
 188 /*
 189  * DAI hardware clock masters
 190  * This is wrt the codec, the inverse is true for the interface
 191  * i.e. if the codec is clk and frm master then the interface is
 192  * clk and frame slave.
 193  */
 194 #define SND_SOC_DAIFMT_CBM_CFM  (0 << 12) /* codec clk & frm master */
 195 #define SND_SOC_DAIFMT_CBS_CFM  (1 << 12) /* codec clk slave & frm master */
 196 #define SND_SOC_DAIFMT_CBM_CFS  (2 << 12) /* codec clk master & frame slave */
 197 #define SND_SOC_DAIFMT_CBS_CFS  (3 << 12) /* codec clk & frm slave */
 198
 199 #define SND_SOC_DAIFMT_FORMAT_MASK              0x000f
 200 #define SND_SOC_DAIFMT_CLOCK_MASK               0x00f0
 201 #define SND_SOC_DAIFMT_INV_MASK                 0x0f00
 202 #define SND_SOC_DAIFMT_MASTER_MASK              0xf000
 203
 204
 205 /*
 206  * Master Clock Directions
 207  */
 208 #define SND_SOC_CLOCK_IN        0
 209 #define SND_SOC_CLOCK_OUT       1
 210
 211 /*
 212  * AC97 codec ID's bitmask
 213  */
 214 #define SND_SOC_DAI_AC97_ID0    (1 << 0)
 215 #define SND_SOC_DAI_AC97_ID1    (1 << 1)
 216 #define SND_SOC_DAI_AC97_ID2    (1 << 2)
 217 #define SND_SOC_DAI_AC97_ID3    (1 << 3)
 218
 219 struct snd_soc_device;
 220 struct snd_soc_pcm_stream;
 221 struct snd_soc_ops;
 222 struct snd_soc_dai_mode;
 223 struct snd_soc_pcm_runtime;
 224 struct snd_soc_dai;
 225 struct snd_soc_codec;
 226 struct snd_soc_machine_config;
 227 struct soc_enum;
 228 struct snd_soc_ac97_ops;
 229 struct snd_soc_clock_info;
 230
 231 typedef int (*hw_write_t)(void *,const char* ,int);
 232 typedef int (*hw_read_t)(void *,char* ,int);
 233
 234 extern struct snd_ac97_bus_ops soc_ac97_ops;
 235
 236 /* pcm <-> DAI connect */
 237 void snd_soc_free_pcms(struct snd_soc_device *socdev);
 238 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid);
 239 int snd_soc_register_card(struct snd_soc_device *socdev);
 240
 241 /* set runtime hw params */
 242 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 243         const struct snd_pcm_hardware *hw);
 244
 245 /* codec IO */
 246 #define snd_soc_read(codec, reg) codec->read(codec, reg)
 247 #define snd_soc_write(codec, reg, value) codec->write(codec, reg, value)
 248
 249 /* codec register bit access */
 250 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
 251                                 unsigned short mask, unsigned short value);
 252 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
 253                                 unsigned short mask, unsigned short value);
 254
 255 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
 256         struct snd_ac97_bus_ops *ops, int num);
 257 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
 258
 259 /* Digital Audio Interface clocking API.*/
 260 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 261         unsigned int freq, int dir);
 262
 263 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
 264         int div_id, int div);
 265
 266 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
 267         int pll_id, unsigned int freq_in, unsigned int freq_out);
 268
 269 /* Digital Audio interface formatting */
 270 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 271
 272 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 273         unsigned int mask, int slots);
 274
 275 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
 276
 277 /* Digital Audio Interface mute */
 278 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
 279
 280 /*
 281  *Controls
 282  */
 283 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
 284         void *data, char *long_name);
 285 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
 286         struct snd_ctl_elem_info *uinfo);
 287 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
 288         struct snd_ctl_elem_info *uinfo);
 289 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
 290         struct snd_ctl_elem_value *ucontrol);
 291 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
 292         struct snd_ctl_elem_value *ucontrol);
 293 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
 294         struct snd_ctl_elem_info *uinfo);
 295 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
 296         struct snd_ctl_elem_info *uinfo);
 297 #define snd_soc_info_bool_ext           snd_ctl_boolean_mono_info
 298 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
 299         struct snd_ctl_elem_value *ucontrol);
 300 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
 301         struct snd_ctl_elem_value *ucontrol);
 302 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
 303         struct snd_ctl_elem_info *uinfo);
 304 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
 305         struct snd_ctl_elem_value *ucontrol);
 306 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
 307         struct snd_ctl_elem_value *ucontrol);
 308 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
 309         struct snd_ctl_elem_info *uinfo);
 310 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
 311         struct snd_ctl_elem_value *ucontrol);
 312 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
 313         struct snd_ctl_elem_value *ucontrol);
 314
 315 /* SoC PCM stream information */
 316 struct snd_soc_pcm_stream {
 317         char *stream_name;
 318         u64 formats;                    /* SNDRV_PCM_FMTBIT_* */
 319         unsigned int rates;             /* SNDRV_PCM_RATE_* */
 320         unsigned int rate_min;          /* min rate */
 321         unsigned int rate_max;          /* max rate */
 322         unsigned int channels_min;      /* min channels */
 323         unsigned int channels_max;      /* max channels */
 324         unsigned int active:1;          /* stream is in use */
 325 };
 326
 327 /* SoC audio ops */
 328 struct snd_soc_ops {
 329         int (*startup)(struct snd_pcm_substream *);
 330         void (*shutdown)(struct snd_pcm_substream *);
 331         int (*hw_params)(struct snd_pcm_substream *, struct snd_pcm_hw_params *);
 332         int (*hw_free)(struct snd_pcm_substream *);
 333         int (*prepare)(struct snd_pcm_substream *);
 334         int (*trigger)(struct snd_pcm_substream *, int);
 335 };
 336
 337 /* ASoC DAI ops */
 338 struct snd_soc_dai_ops {
 339         /* DAI clocking configuration */
 340         int (*set_sysclk)(struct snd_soc_dai *dai,
 341                 int clk_id, unsigned int freq, int dir);
 342         int (*set_pll)(struct snd_soc_dai *dai,
 343                 int pll_id, unsigned int freq_in, unsigned int freq_out);
 344         int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
 345
 346         /* DAI format configuration */
 347         int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
 348         int (*set_tdm_slot)(struct snd_soc_dai *dai,
 349                 unsigned int mask, int slots);
 350         int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
 351
 352         /* digital mute */
 353         int (*digital_mute)(struct snd_soc_dai *dai, int mute);
 354 };
 355
 356 /* SoC  DAI (Digital Audio Interface) */
 357 struct snd_soc_dai {
 358         /* DAI description */
 359         char *name;
 360         unsigned int id;
 361         unsigned char type;
 362
 363         /* DAI callbacks */
 364         int (*probe)(struct platform_device *pdev,
 365                      struct snd_soc_dai *dai);
 366         void (*remove)(struct platform_device *pdev,
 367                        struct snd_soc_dai *dai);
 368         int (*suspend)(struct platform_device *pdev,
 369                 struct snd_soc_dai *dai);
 370         int (*resume)(struct platform_device *pdev,
 371                 struct snd_soc_dai *dai);
 372
 373         /* ops */
 374         struct snd_soc_ops ops;
 375         struct snd_soc_dai_ops dai_ops;
 376
 377         /* DAI capabilities */
 378         struct snd_soc_pcm_stream capture;
 379         struct snd_soc_pcm_stream playback;
 380
 381         /* DAI runtime info */
 382         struct snd_pcm_runtime *runtime;
 383         struct snd_soc_codec *codec;
 384         unsigned int active;
 385         unsigned char pop_wait:1;
 386         void *dma_data;
 387
 388         /* DAI private data */
 389         void *private_data;
 390 };
 391
 392 /* SoC Audio Codec */
 393 struct snd_soc_codec {
 394         char *name;
 395         struct module *owner;
 396         struct mutex mutex;
 397
 398         /* callbacks */
 399         int (*set_bias_level)(struct snd_soc_codec *,
 400                               enum snd_soc_bias_level level);
 401
 402         /* runtime */
 403         struct snd_card *card;
 404         struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */
 405         unsigned int active;
 406         unsigned int pcm_devs;
 407         void *private_data;
 408
 409         /* codec IO */
 410         void *control_data; /* codec control (i2c/3wire) data */
 411         unsigned int (*read)(struct snd_soc_codec *, unsigned int);
 412         int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
 413         hw_write_t hw_write;
 414         hw_read_t hw_read;
 415         void *reg_cache;
 416         short reg_cache_size;
 417         short reg_cache_step;
 418
 419         /* dapm */
 420         struct list_head dapm_widgets;
 421         struct list_head dapm_paths;
 422         enum snd_soc_bias_level bias_level;
 423         enum snd_soc_bias_level suspend_bias_level;
 424         struct delayed_work delayed_work;
 425
 426         /* codec DAI's */
 427         struct snd_soc_dai *dai;
 428         unsigned int num_dai;
 429 };
 430
 431 /* codec device */
 432 struct snd_soc_codec_device {
 433         int (*probe)(struct platform_device *pdev);
 434         int (*remove)(struct platform_device *pdev);
 435         int (*suspend)(struct platform_device *pdev, pm_message_t state);
 436         int (*resume)(struct platform_device *pdev);
 437 };
 438
 439 /* SoC platform interface */
 440 struct snd_soc_platform {
 441         char *name;
 442
 443         int (*probe)(struct platform_device *pdev);
 444         int (*remove)(struct platform_device *pdev);
 445         int (*suspend)(struct platform_device *pdev,
 446                 struct snd_soc_dai *dai);
 447         int (*resume)(struct platform_device *pdev,
 448                 struct snd_soc_dai *dai);
 449
 450         /* pcm creation and destruction */
 451         int (*pcm_new)(struct snd_card *, struct snd_soc_dai *,
 452                 struct snd_pcm *);
 453         void (*pcm_free)(struct snd_pcm *);
 454
 455         /* platform stream ops */
 456         struct snd_pcm_ops *pcm_ops;
 457 };
 458
 459 /* SoC machine DAI configuration, glues a codec and cpu DAI together */
 460 struct snd_soc_dai_link  {
 461         char *name;                     /* Codec name */
 462         char *stream_name;              /* Stream name */
 463
 464         /* DAI */
 465         struct snd_soc_dai *codec_dai;
 466         struct snd_soc_dai *cpu_dai;
 467
 468         /* machine stream operations */
 469         struct snd_soc_ops *ops;
 470
 471         /* codec/machine specific init - e.g. add machine controls */
 472         int (*init)(struct snd_soc_codec *codec);
 473
 474         /* DAI pcm */
 475         struct snd_pcm *pcm;
 476 };
 477
 478 /* SoC machine */
 479 struct snd_soc_machine {
 480         char *name;
 481
 482         int (*probe)(struct platform_device *pdev);
 483         int (*remove)(struct platform_device *pdev);
 484
 485         /* the pre and post PM functions are used to do any PM work before and
 486          * after the codec and DAI's do any PM work. */
 487         int (*suspend_pre)(struct platform_device *pdev, pm_message_t state);
 488         int (*suspend_post)(struct platform_device *pdev, pm_message_t state);
 489         int (*resume_pre)(struct platform_device *pdev);
 490         int (*resume_post)(struct platform_device *pdev);
 491
 492         /* callbacks */
 493         int (*set_bias_level)(struct snd_soc_machine *,
 494                               enum snd_soc_bias_level level);
 495
 496         /* CPU <--> Codec DAI links  */
 497         struct snd_soc_dai_link *dai_link;
 498         int num_links;
 499 };
 500
 501 /* SoC Device - the audio subsystem */
 502 struct snd_soc_device {
 503         struct device *dev;
 504         struct snd_soc_machine *machine;
 505         struct snd_soc_platform *platform;
 506         struct snd_soc_codec *codec;
 507         struct snd_soc_codec_device *codec_dev;
 508         struct delayed_work delayed_work;
 509         struct work_struct deferred_resume_work;
 510         void *codec_data;
 511 };
 512
 513 /* runtime channel data */
 514 struct snd_soc_pcm_runtime {
 515         struct snd_soc_dai_link *dai;
 516         struct snd_soc_device *socdev;
 517 };
 518
 519 /* enumerated kcontrol */
 520 struct soc_enum {
 521         unsigned short reg;
 522         unsigned short reg2;
 523         unsigned char shift_l;
 524         unsigned char shift_r;
 525         unsigned int mask;
 526         const char **texts;
 527         void *dapm;
 528 };
 529
 530 #endif