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