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 /*
  25  * Convenience kcontrol builders
  26  */
  27 #define SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) \
  28         ((unsigned long)&(struct soc_mixer_control) \
  29         {.reg = xreg, .shift = xshift, .rshift = xshift, .max = xmax, \
  30         .invert = xinvert})
  31 #define SOC_SINGLE_VALUE_EXT(xreg, xmax, xinvert) \
  32         ((unsigned long)&(struct soc_mixer_control) \
  33         {.reg = xreg, .max = xmax, .invert = xinvert})
  34 #define SOC_SINGLE(xname, reg, shift, max, invert) \
  35 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  36         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
  37         .put = snd_soc_put_volsw, \
  38         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
  39 #define SOC_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
  40 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  41         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  42                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  43         .tlv.p = (tlv_array), \
  44         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
  45         .put = snd_soc_put_volsw, \
  46         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
  47 #define SOC_DOUBLE(xname, xreg, shift_left, shift_right, xmax, xinvert) \
  48 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  49         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
  50         .put = snd_soc_put_volsw, \
  51         .private_value = (unsigned long)&(struct soc_mixer_control) \
  52                 {.reg = xreg, .shift = shift_left, .rshift = shift_right, \
  53                  .max = xmax, .invert = xinvert} }
  54 #define SOC_DOUBLE_R(xname, reg_left, reg_right, xshift, xmax, xinvert) \
  55 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  56         .info = snd_soc_info_volsw_2r, \
  57         .get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
  58         .private_value = (unsigned long)&(struct soc_mixer_control) \
  59                 {.reg = reg_left, .rreg = reg_right, .shift = xshift, \
  60                 .max = xmax, .invert = xinvert} }
  61 #define SOC_DOUBLE_TLV(xname, xreg, shift_left, shift_right, xmax, xinvert, tlv_array) \
  62 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  63         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  64                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  65         .tlv.p = (tlv_array), \
  66         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
  67         .put = snd_soc_put_volsw, \
  68         .private_value = (unsigned long)&(struct soc_mixer_control) \
  69                 {.reg = xreg, .shift = shift_left, .rshift = shift_right,\
  70                  .max = xmax, .invert = xinvert} }
  71 #define SOC_DOUBLE_R_TLV(xname, reg_left, reg_right, xshift, xmax, xinvert, tlv_array) \
  72 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
  73         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
  74                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
  75         .tlv.p = (tlv_array), \
  76         .info = snd_soc_info_volsw_2r, \
  77         .get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
  78         .private_value = (unsigned long)&(struct soc_mixer_control) \
  79                 {.reg = reg_left, .rreg = reg_right, .shift = xshift, \
  80                 .max = xmax, .invert = xinvert} }
  81 #define SOC_DOUBLE_S8_TLV(xname, xreg, xmin, xmax, tlv_array) \
  82 {       .iface  = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
  83         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
  84                   SNDRV_CTL_ELEM_ACCESS_READWRITE, \
  85         .tlv.p  = (tlv_array), \
  86         .info   = snd_soc_info_volsw_s8, .get = snd_soc_get_volsw_s8, \
  87         .put    = snd_soc_put_volsw_s8, \
  88         .private_value = (unsigned long)&(struct soc_mixer_control) \
  89                 {.reg = xreg, .min = xmin, .max = xmax} }
  90 #define SOC_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmax, xtexts) \
  91 {       .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
  92         .max = xmax, .texts = xtexts }
  93 #define SOC_ENUM_SINGLE(xreg, xshift, xmax, xtexts) \
  94         SOC_ENUM_DOUBLE(xreg, xshift, xshift, xmax, xtexts)
  95 #define SOC_ENUM_SINGLE_EXT(xmax, xtexts) \
  96 {       .max = xmax, .texts = xtexts }
  97 #define SOC_ENUM(xname, xenum) \
  98 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,\
  99         .info = snd_soc_info_enum_double, \
 100         .get = snd_soc_get_enum_double, .put = snd_soc_put_enum_double, \
 101         .private_value = (unsigned long)&xenum }
 102 #define SOC_SINGLE_EXT(xname, xreg, xshift, xmax, xinvert,\
 103          xhandler_get, xhandler_put) \
 104 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 105         .info = snd_soc_info_volsw, \
 106         .get = xhandler_get, .put = xhandler_put, \
 107         .private_value = SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) }
 108 #define SOC_SINGLE_EXT_TLV(xname, xreg, xshift, xmax, xinvert,\
 109          xhandler_get, xhandler_put, tlv_array) \
 110 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 111         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
 112                  SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 113         .tlv.p = (tlv_array), \
 114         .info = snd_soc_info_volsw, \
 115         .get = xhandler_get, .put = xhandler_put, \
 116         .private_value = SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) }
 117 #define SOC_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) \
 118 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 119         .info = snd_soc_info_bool_ext, \
 120         .get = xhandler_get, .put = xhandler_put, \
 121         .private_value = xdata }
 122 #define SOC_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put) \
 123 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 124         .info = snd_soc_info_enum_ext, \
 125         .get = xhandler_get, .put = xhandler_put, \
 126         .private_value = (unsigned long)&xenum }
 127
 128 /*
 129  * Bias levels
 130  *
 131  * @ON:      Bias is fully on for audio playback and capture operations.
 132  * @PREPARE: Prepare for audio operations. Called before DAPM switching for
 133  *           stream start and stop operations.
 134  * @STANDBY: Low power standby state when no playback/capture operations are
 135  *           in progress. NOTE: The transition time between STANDBY and ON
 136  *           should be as fast as possible and no longer than 10ms.
 137  * @OFF:     Power Off. No restrictions on transition times.
 138  */
 139 enum snd_soc_bias_level {
 140         SND_SOC_BIAS_ON,
 141         SND_SOC_BIAS_PREPARE,
 142         SND_SOC_BIAS_STANDBY,
 143         SND_SOC_BIAS_OFF,
 144 };
 145
 146 /*
 147  * Digital Audio Interface (DAI) types
 148  */
 149 #define SND_SOC_DAI_AC97        0x1
 150 #define SND_SOC_DAI_I2S         0x2
 151 #define SND_SOC_DAI_PCM         0x4
 152 #define SND_SOC_DAI_AC97_BUS    0x8     /* for custom i.e. non ac97_codec.c */
 153
 154 /*
 155  * DAI hardware audio formats
 156  */
 157 #define SND_SOC_DAIFMT_I2S              0       /* I2S mode */
 158 #define SND_SOC_DAIFMT_RIGHT_J  1       /* Right justified mode */
 159 #define SND_SOC_DAIFMT_LEFT_J   2       /* Left Justified mode */
 160 #define SND_SOC_DAIFMT_DSP_A    3       /* L data msb after FRM or LRC */
 161 #define SND_SOC_DAIFMT_DSP_B    4       /* L data msb during FRM or LRC */
 162 #define SND_SOC_DAIFMT_AC97             5       /* AC97 */
 163
 164 #define SND_SOC_DAIFMT_MSB      SND_SOC_DAIFMT_LEFT_J
 165 #define SND_SOC_DAIFMT_LSB      SND_SOC_DAIFMT_RIGHT_J
 166
 167 /*
 168  * DAI Gating
 169  */
 170 #define SND_SOC_DAIFMT_CONT                     (0 << 4)        /* continuous clock */
 171 #define SND_SOC_DAIFMT_GATED            (1 << 4)        /* clock is gated when not Tx/Rx */
 172
 173 /*
 174  * DAI Sync
 175  * Synchronous LR (Left Right) clocks and Frame signals.
 176  */
 177 #define SND_SOC_DAIFMT_SYNC             (0 << 5)        /* Tx FRM = Rx FRM */
 178 #define SND_SOC_DAIFMT_ASYNC            (1 << 5)        /* Tx FRM ~ Rx FRM */
 179
 180 /*
 181  * TDM
 182  */
 183 #define SND_SOC_DAIFMT_TDM              (1 << 6)
 184
 185 /*
 186  * DAI hardware signal inversions
 187  */
 188 #define SND_SOC_DAIFMT_NB_NF            (0 << 8)        /* normal bclk + frm */
 189 #define SND_SOC_DAIFMT_NB_IF            (1 << 8)        /* normal bclk + inv frm */
 190 #define SND_SOC_DAIFMT_IB_NF            (2 << 8)        /* invert bclk + nor frm */
 191 #define SND_SOC_DAIFMT_IB_IF            (3 << 8)        /* invert bclk + frm */
 192
 193 /*
 194  * DAI hardware clock masters
 195  * This is wrt the codec, the inverse is true for the interface
 196  * i.e. if the codec is clk and frm master then the interface is
 197  * clk and frame slave.
 198  */
 199 #define SND_SOC_DAIFMT_CBM_CFM  (0 << 12) /* codec clk & frm master */
 200 #define SND_SOC_DAIFMT_CBS_CFM  (1 << 12) /* codec clk slave & frm master */
 201 #define SND_SOC_DAIFMT_CBM_CFS  (2 << 12) /* codec clk master & frame slave */
 202 #define SND_SOC_DAIFMT_CBS_CFS  (3 << 12) /* codec clk & frm slave */
 203
 204 #define SND_SOC_DAIFMT_FORMAT_MASK              0x000f
 205 #define SND_SOC_DAIFMT_CLOCK_MASK               0x00f0
 206 #define SND_SOC_DAIFMT_INV_MASK                 0x0f00
 207 #define SND_SOC_DAIFMT_MASTER_MASK              0xf000
 208
 209
 210 /*
 211  * Master Clock Directions
 212  */
 213 #define SND_SOC_CLOCK_IN        0
 214 #define SND_SOC_CLOCK_OUT       1
 215
 216 /*
 217  * AC97 codec ID's bitmask
 218  */
 219 #define SND_SOC_DAI_AC97_ID0    (1 << 0)
 220 #define SND_SOC_DAI_AC97_ID1    (1 << 1)
 221 #define SND_SOC_DAI_AC97_ID2    (1 << 2)
 222 #define SND_SOC_DAI_AC97_ID3    (1 << 3)
 223
 224 struct snd_soc_device;
 225 struct snd_soc_pcm_stream;
 226 struct snd_soc_ops;
 227 struct snd_soc_dai_mode;
 228 struct snd_soc_pcm_runtime;
 229 struct snd_soc_dai;
 230 struct snd_soc_codec;
 231 struct soc_enum;
 232 struct snd_soc_ac97_ops;
 233 struct snd_soc_clock_info;
 234
 235 typedef int (*hw_write_t)(void *,const char* ,int);
 236 typedef int (*hw_read_t)(void *,char* ,int);
 237
 238 extern struct snd_ac97_bus_ops soc_ac97_ops;
 239
 240 /* pcm <-> DAI connect */
 241 void snd_soc_free_pcms(struct snd_soc_device *socdev);
 242 int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid);
 243 int snd_soc_register_card(struct snd_soc_device *socdev);
 244
 245 /* set runtime hw params */
 246 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 247         const struct snd_pcm_hardware *hw);
 248
 249 /* codec IO */
 250 #define snd_soc_read(codec, reg) codec->read(codec, reg)
 251 #define snd_soc_write(codec, reg, value) codec->write(codec, reg, value)
 252
 253 /* codec register bit access */
 254 int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
 255                                 unsigned short mask, unsigned short value);
 256 int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
 257                                 unsigned short mask, unsigned short value);
 258
 259 int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
 260         struct snd_ac97_bus_ops *ops, int num);
 261 void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
 262
 263 /* Digital Audio Interface clocking API.*/
 264 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 265         unsigned int freq, int dir);
 266
 267 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
 268         int div_id, int div);
 269
 270 int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
 271         int pll_id, unsigned int freq_in, unsigned int freq_out);
 272
 273 /* Digital Audio interface formatting */
 274 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 275
 276 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 277         unsigned int mask, int slots);
 278
 279 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
 280
 281 /* Digital Audio Interface mute */
 282 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
 283
 284 /*
 285  *Controls
 286  */
 287 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
 288         void *data, char *long_name);
 289 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
 290         struct snd_ctl_elem_info *uinfo);
 291 int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
 292         struct snd_ctl_elem_info *uinfo);
 293 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
 294         struct snd_ctl_elem_value *ucontrol);
 295 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
 296         struct snd_ctl_elem_value *ucontrol);
 297 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
 298         struct snd_ctl_elem_info *uinfo);
 299 int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
 300         struct snd_ctl_elem_info *uinfo);
 301 #define snd_soc_info_bool_ext           snd_ctl_boolean_mono_info
 302 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
 303         struct snd_ctl_elem_value *ucontrol);
 304 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
 305         struct snd_ctl_elem_value *ucontrol);
 306 int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
 307         struct snd_ctl_elem_info *uinfo);
 308 int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
 309         struct snd_ctl_elem_value *ucontrol);
 310 int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
 311         struct snd_ctl_elem_value *ucontrol);
 312 int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
 313         struct snd_ctl_elem_info *uinfo);
 314 int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
 315         struct snd_ctl_elem_value *ucontrol);
 316 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
 317         struct snd_ctl_elem_value *ucontrol);
 318
 319 /* SoC PCM stream information */
 320 struct snd_soc_pcm_stream {
 321         char *stream_name;
 322         u64 formats;                    /* SNDRV_PCM_FMTBIT_* */
 323         unsigned int rates;             /* SNDRV_PCM_RATE_* */
 324         unsigned int rate_min;          /* min rate */
 325         unsigned int rate_max;          /* max rate */
 326         unsigned int channels_min;      /* min channels */
 327         unsigned int channels_max;      /* max channels */
 328         unsigned int active:1;          /* stream is in use */
 329 };
 330
 331 /* SoC audio ops */
 332 struct snd_soc_ops {
 333         int (*startup)(struct snd_pcm_substream *);
 334         void (*shutdown)(struct snd_pcm_substream *);
 335         int (*hw_params)(struct snd_pcm_substream *, struct snd_pcm_hw_params *);
 336         int (*hw_free)(struct snd_pcm_substream *);
 337         int (*prepare)(struct snd_pcm_substream *);
 338         int (*trigger)(struct snd_pcm_substream *, int);
 339 };
 340
 341 /* ASoC DAI ops */
 342 struct snd_soc_dai_ops {
 343         /* DAI clocking configuration */
 344         int (*set_sysclk)(struct snd_soc_dai *dai,
 345                 int clk_id, unsigned int freq, int dir);
 346         int (*set_pll)(struct snd_soc_dai *dai,
 347                 int pll_id, unsigned int freq_in, unsigned int freq_out);
 348         int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
 349
 350         /* DAI format configuration */
 351         int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
 352         int (*set_tdm_slot)(struct snd_soc_dai *dai,
 353                 unsigned int mask, int slots);
 354         int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
 355
 356         /* digital mute */
 357         int (*digital_mute)(struct snd_soc_dai *dai, int mute);
 358 };
 359
 360 /* SoC  DAI (Digital Audio Interface) */
 361 struct snd_soc_dai {
 362         /* DAI description */
 363         char *name;
 364         unsigned int id;
 365         unsigned char type;
 366
 367         /* DAI callbacks */
 368         int (*probe)(struct platform_device *pdev,
 369                      struct snd_soc_dai *dai);
 370         void (*remove)(struct platform_device *pdev,
 371                        struct snd_soc_dai *dai);
 372         int (*suspend)(struct platform_device *pdev,
 373                 struct snd_soc_dai *dai);
 374         int (*resume)(struct platform_device *pdev,
 375                 struct snd_soc_dai *dai);
 376
 377         /* ops */
 378         struct snd_soc_ops ops;
 379         struct snd_soc_dai_ops dai_ops;
 380
 381         /* DAI capabilities */
 382         struct snd_soc_pcm_stream capture;
 383         struct snd_soc_pcm_stream playback;
 384
 385         /* DAI runtime info */
 386         struct snd_pcm_runtime *runtime;
 387         struct snd_soc_codec *codec;
 388         unsigned int active;
 389         unsigned char pop_wait:1;
 390         void *dma_data;
 391
 392         /* DAI private data */
 393         void *private_data;
 394 };
 395
 396 /* SoC Audio Codec */
 397 struct snd_soc_codec {
 398         char *name;
 399         struct module *owner;
 400         struct mutex mutex;
 401
 402         /* callbacks */
 403         int (*set_bias_level)(struct snd_soc_codec *,
 404                               enum snd_soc_bias_level level);
 405
 406         /* runtime */
 407         struct snd_card *card;
 408         struct snd_ac97 *ac97;  /* for ad-hoc ac97 devices */
 409         unsigned int active;
 410         unsigned int pcm_devs;
 411         void *private_data;
 412
 413         /* codec IO */
 414         void *control_data; /* codec control (i2c/3wire) data */
 415         unsigned int (*read)(struct snd_soc_codec *, unsigned int);
 416         int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
 417         int (*display_register)(struct snd_soc_codec *, char *,
 418                                 size_t, unsigned int);
 419         hw_write_t hw_write;
 420         hw_read_t hw_read;
 421         void *reg_cache;
 422         short reg_cache_size;
 423         short reg_cache_step;
 424
 425         /* dapm */
 426         u32 pop_time;
 427         struct list_head dapm_widgets;
 428         struct list_head dapm_paths;
 429         enum snd_soc_bias_level bias_level;
 430         enum snd_soc_bias_level suspend_bias_level;
 431         struct delayed_work delayed_work;
 432
 433         /* codec DAI's */
 434         struct snd_soc_dai *dai;
 435         unsigned int num_dai;
 436 };
 437
 438 /* codec device */
 439 struct snd_soc_codec_device {
 440         int (*probe)(struct platform_device *pdev);
 441         int (*remove)(struct platform_device *pdev);
 442         int (*suspend)(struct platform_device *pdev, pm_message_t state);
 443         int (*resume)(struct platform_device *pdev);
 444 };
 445
 446 /* SoC platform interface */
 447 struct snd_soc_platform {
 448         char *name;
 449
 450         int (*probe)(struct platform_device *pdev);
 451         int (*remove)(struct platform_device *pdev);
 452         int (*suspend)(struct platform_device *pdev,
 453                 struct snd_soc_dai *dai);
 454         int (*resume)(struct platform_device *pdev,
 455                 struct snd_soc_dai *dai);
 456
 457         /* pcm creation and destruction */
 458         int (*pcm_new)(struct snd_card *, struct snd_soc_dai *,
 459                 struct snd_pcm *);
 460         void (*pcm_free)(struct snd_pcm *);
 461
 462         /* platform stream ops */
 463         struct snd_pcm_ops *pcm_ops;
 464 };
 465
 466 /* SoC machine DAI configuration, glues a codec and cpu DAI together */
 467 struct snd_soc_dai_link  {
 468         char *name;                     /* Codec name */
 469         char *stream_name;              /* Stream name */
 470
 471         /* DAI */
 472         struct snd_soc_dai *codec_dai;
 473         struct snd_soc_dai *cpu_dai;
 474
 475         /* machine stream operations */
 476         struct snd_soc_ops *ops;
 477
 478         /* codec/machine specific init - e.g. add machine controls */
 479         int (*init)(struct snd_soc_codec *codec);
 480
 481         /* DAI pcm */
 482         struct snd_pcm *pcm;
 483 };
 484
 485 /* SoC machine */
 486 struct snd_soc_machine {
 487         char *name;
 488
 489         int (*probe)(struct platform_device *pdev);
 490         int (*remove)(struct platform_device *pdev);
 491
 492         /* the pre and post PM functions are used to do any PM work before and
 493          * after the codec and DAI's do any PM work. */
 494         int (*suspend_pre)(struct platform_device *pdev, pm_message_t state);
 495         int (*suspend_post)(struct platform_device *pdev, pm_message_t state);
 496         int (*resume_pre)(struct platform_device *pdev);
 497         int (*resume_post)(struct platform_device *pdev);
 498
 499         /* callbacks */
 500         int (*set_bias_level)(struct snd_soc_machine *,
 501                               enum snd_soc_bias_level level);
 502
 503         /* CPU <--> Codec DAI links  */
 504         struct snd_soc_dai_link *dai_link;
 505         int num_links;
 506 };
 507
 508 /* SoC Device - the audio subsystem */
 509 struct snd_soc_device {
 510         struct device *dev;
 511         struct snd_soc_machine *machine;
 512         struct snd_soc_platform *platform;
 513         struct snd_soc_codec *codec;
 514         struct snd_soc_codec_device *codec_dev;
 515         struct delayed_work delayed_work;
 516         struct work_struct deferred_resume_work;
 517         void *codec_data;
 518 #ifdef CONFIG_DEBUG_FS
 519         struct dentry   *debugfs_root;
 520 #endif
 521 };
 522
 523 /* runtime channel data */
 524 struct snd_soc_pcm_runtime {
 525         struct snd_soc_dai_link *dai;
 526         struct snd_soc_device *socdev;
 527 };
 528
 529 /* mixer control */
 530 struct soc_mixer_control {
 531         int min, max;
 532         unsigned int reg, rreg, shift, rshift, invert;
 533 };
 534
 535 /* enumerated kcontrol */
 536 struct soc_enum {
 537         unsigned short reg;
 538         unsigned short reg2;
 539         unsigned char shift_l;
 540         unsigned char shift_r;
 541         unsigned int max;
 542         const char **texts;
 543         void *dapm;
 544 };
 545
 546 #endif