LXR linux/include/sound/soc-dapm.h

   1/*
   2 * linux/sound/soc-dapm.h -- ALSA SoC Dynamic Audio Power Management
   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_DAPM_H
  14#define __LINUX_SND_SOC_DAPM_H
  15
  16#include <linux/device.h>
  17#include <linux/types.h>
  18#include <sound/control.h>
  19#include <sound/soc.h>
  20
  21/* widget has no PM register bit */
  22#define SND_SOC_NOPM    -1
  23
  24/*
  25 * SoC dynamic audio power management
  26 *
  27 * We can have upto 4 power domains
  28 *      1. Codec domain - VREF, VMID
  29 *     Usually controlled at codec probe/remove, although can be set
  30 *     at stream time if power is not needed for sidetone, etc.
  31 *  2. Platform/Machine domain - physically connected inputs and outputs
  32 *     Is platform/machine and user action specific, is set in the machine
  33 *     driver and by userspace e.g when HP are inserted
  34 *  3. Path domain - Internal codec path mixers
  35 *     Are automatically set when mixer and mux settings are
  36 *     changed by the user.
  37 *  4. Stream domain - DAC's and ADC's.
  38 *     Enabled when stream playback/capture is started.
  39 */
  40
  41/* codec domain */
  42#define SND_SOC_DAPM_VMID(wname) \
  43{       .id = snd_soc_dapm_vmid, .name = wname, .kcontrols = NULL, \
  44        .num_kcontrols = 0}
  45
  46/* platform domain */
  47#define SND_SOC_DAPM_INPUT(wname) \
  48{       .id = snd_soc_dapm_input, .name = wname, .kcontrols = NULL, \
  49        .num_kcontrols = 0}
  50#define SND_SOC_DAPM_OUTPUT(wname) \
  51{       .id = snd_soc_dapm_output, .name = wname, .kcontrols = NULL, \
  52        .num_kcontrols = 0}
  53#define SND_SOC_DAPM_MIC(wname, wevent) \
  54{       .id = snd_soc_dapm_mic, .name = wname, .kcontrols = NULL, \
  55        .num_kcontrols = 0, .event = wevent, \
  56        .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD}
  57#define SND_SOC_DAPM_HP(wname, wevent) \
  58{       .id = snd_soc_dapm_hp, .name = wname, .kcontrols = NULL, \
  59        .num_kcontrols = 0, .event = wevent, \
  60        .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
  61#define SND_SOC_DAPM_SPK(wname, wevent) \
  62{       .id = snd_soc_dapm_spk, .name = wname, .kcontrols = NULL, \
  63        .num_kcontrols = 0, .event = wevent, \
  64        .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
  65#define SND_SOC_DAPM_LINE(wname, wevent) \
  66{       .id = snd_soc_dapm_line, .name = wname, .kcontrols = NULL, \
  67        .num_kcontrols = 0, .event = wevent, \
  68        .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
  69
  70/* path domain */
  71#define SND_SOC_DAPM_PGA(wname, wreg, wshift, winvert,\
  72         wcontrols, wncontrols) \
  73{       .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
  74        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
  75#define SND_SOC_DAPM_MIXER(wname, wreg, wshift, winvert, \
  76         wcontrols, wncontrols)\
  77{       .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
  78        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
  79#define SND_SOC_DAPM_MIXER_NAMED_CTL(wname, wreg, wshift, winvert, \
  80         wcontrols, wncontrols)\
  81{       .id = snd_soc_dapm_mixer_named_ctl, .name = wname, .reg = wreg, \
  82        .shift = wshift, .invert = winvert, .kcontrols = wcontrols, \
  83        .num_kcontrols = wncontrols}
  84#define SND_SOC_DAPM_MICBIAS(wname, wreg, wshift, winvert) \
  85{       .id = snd_soc_dapm_micbias, .name = wname, .reg = wreg, .shift = wshift, \
  86        .invert = winvert, .kcontrols = NULL, .num_kcontrols = 0}
  87#define SND_SOC_DAPM_SWITCH(wname, wreg, wshift, winvert, wcontrols) \
  88{       .id = snd_soc_dapm_switch, .name = wname, .reg = wreg, .shift = wshift, \
  89        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
  90#define SND_SOC_DAPM_MUX(wname, wreg, wshift, winvert, wcontrols) \
  91{       .id = snd_soc_dapm_mux, .name = wname, .reg = wreg, .shift = wshift, \
  92        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
  93#define SND_SOC_DAPM_VALUE_MUX(wname, wreg, wshift, winvert, wcontrols) \
  94{       .id = snd_soc_dapm_value_mux, .name = wname, .reg = wreg, \
  95        .shift = wshift, .invert = winvert, .kcontrols = wcontrols, \
  96        .num_kcontrols = 1}
  97
  98/* path domain with event - event handler must return 0 for success */
  99#define SND_SOC_DAPM_PGA_E(wname, wreg, wshift, winvert, wcontrols, \
 100        wncontrols, wevent, wflags) \
 101{       .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
 102        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
 103        .event = wevent, .event_flags = wflags}
 104#define SND_SOC_DAPM_MIXER_E(wname, wreg, wshift, winvert, wcontrols, \
 105        wncontrols, wevent, wflags) \
 106{       .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
 107        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
 108        .event = wevent, .event_flags = wflags}
 109#define SND_SOC_DAPM_MIXER_NAMED_CTL_E(wname, wreg, wshift, winvert, \
 110        wcontrols, wncontrols, wevent, wflags) \
 111{       .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
 112        .invert = winvert, .kcontrols = wcontrols, \
 113        .num_kcontrols = wncontrols, .event = wevent, .event_flags = wflags}
 114#define SND_SOC_DAPM_MICBIAS_E(wname, wreg, wshift, winvert, wevent, wflags) \
 115{       .id = snd_soc_dapm_micbias, .name = wname, .reg = wreg, .shift = wshift, \
 116        .invert = winvert, .kcontrols = NULL, .num_kcontrols = 0, \
 117        .event = wevent, .event_flags = wflags}
 118#define SND_SOC_DAPM_SWITCH_E(wname, wreg, wshift, winvert, wcontrols, \
 119        wevent, wflags) \
 120{       .id = snd_soc_dapm_switch, .name = wname, .reg = wreg, .shift = wshift, \
 121        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
 122        .event = wevent, .event_flags = wflags}
 123#define SND_SOC_DAPM_MUX_E(wname, wreg, wshift, winvert, wcontrols, \
 124        wevent, wflags) \
 125{       .id = snd_soc_dapm_mux, .name = wname, .reg = wreg, .shift = wshift, \
 126        .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
 127        .event = wevent, .event_flags = wflags}
 128
 129/* events that are pre and post DAPM */
 130#define SND_SOC_DAPM_PRE(wname, wevent) \
 131{       .id = snd_soc_dapm_pre, .name = wname, .kcontrols = NULL, \
 132        .num_kcontrols = 0, .event = wevent, \
 133        .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD}
 134#define SND_SOC_DAPM_POST(wname, wevent) \
 135{       .id = snd_soc_dapm_post, .name = wname, .kcontrols = NULL, \
 136        .num_kcontrols = 0, .event = wevent, \
 137        .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD}
 138
 139/* stream domain */
 140#define SND_SOC_DAPM_AIF_IN(wname, stname, wslot, wreg, wshift, winvert) \
 141{       .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
 142        .reg = wreg, .shift = wshift, .invert = winvert }
 143#define SND_SOC_DAPM_AIF_OUT(wname, stname, wslot, wreg, wshift, winvert) \
 144{       .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
 145        .reg = wreg, .shift = wshift, .invert = winvert }
 146#define SND_SOC_DAPM_DAC(wname, stname, wreg, wshift, winvert) \
 147{       .id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
 148        .shift = wshift, .invert = winvert}
 149#define SND_SOC_DAPM_DAC_E(wname, stname, wreg, wshift, winvert, \
 150                           wevent, wflags)                              \
 151{       .id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
 152        .shift = wshift, .invert = winvert, \
 153        .event = wevent, .event_flags = wflags}
 154#define SND_SOC_DAPM_ADC(wname, stname, wreg, wshift, winvert) \
 155{       .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
 156        .shift = wshift, .invert = winvert}
 157#define SND_SOC_DAPM_ADC_E(wname, stname, wreg, wshift, winvert, \
 158                           wevent, wflags)                              \
 159{       .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
 160        .shift = wshift, .invert = winvert, \
 161        .event = wevent, .event_flags = wflags}
 162
 163/* generic widgets */
 164#define SND_SOC_DAPM_REG(wid, wname, wreg, wshift, wmask, won_val, woff_val) \
 165{       .id = wid, .name = wname, .kcontrols = NULL, .num_kcontrols = 0, \
 166        .reg = -((wreg) + 1), .shift = wshift, .mask = wmask, \
 167        .on_val = won_val, .off_val = woff_val, .event = dapm_reg_event, \
 168        .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD}
 169#define SND_SOC_DAPM_SUPPLY(wname, wreg, wshift, winvert, wevent, wflags) \
 170{       .id = snd_soc_dapm_supply, .name = wname, .reg = wreg,  \
 171        .shift = wshift, .invert = winvert, .event = wevent, \
 172        .event_flags = wflags}
 173
 174/* dapm kcontrol types */
 175#define SOC_DAPM_SINGLE(xname, reg, shift, max, invert) \
 176{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 177        .info = snd_soc_info_volsw, \
 178        .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
 179        .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
 180#define SOC_DAPM_DOUBLE(xname, reg, shift_left, shift_right, max, invert, \
 181        power) \
 182{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
 183        .info = snd_soc_info_volsw, \
 184        .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
 185        .private_value = (reg) | ((shift_left) << 8) | ((shift_right) << 12) |\
 186                ((max) << 16) | ((invert) << 24) }
 187#define SOC_DAPM_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
 188{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 189        .info = snd_soc_info_volsw, \
 190        .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 191        .tlv.p = (tlv_array), \
 192        .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
 193        .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
 194#define SOC_DAPM_DOUBLE_TLV(xname, reg, shift_left, shift_right, max, invert, \
 195        power, tlv_array) \
 196{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
 197        .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,\
 198        .tlv.p = (tlv_array), \
 199        .info = snd_soc_info_volsw, \
 200        .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
 201        .private_value = (reg) | ((shift_left) << 8) | ((shift_right) << 12) |\
 202                ((max) << 16) | ((invert) << 24) }
 203#define SOC_DAPM_ENUM(xname, xenum) \
 204{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 205        .info = snd_soc_info_enum_double, \
 206        .get = snd_soc_dapm_get_enum_double, \
 207        .put = snd_soc_dapm_put_enum_double, \
 208        .private_value = (unsigned long)&xenum }
 209#define SOC_DAPM_ENUM_VIRT(xname, xenum)                    \
 210{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 211        .info = snd_soc_info_enum_double, \
 212        .get = snd_soc_dapm_get_enum_virt, \
 213        .put = snd_soc_dapm_put_enum_virt, \
 214        .private_value = (unsigned long)&xenum }
 215#define SOC_DAPM_VALUE_ENUM(xname, xenum) \
 216{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
 217        .info = snd_soc_info_enum_double, \
 218        .get = snd_soc_dapm_get_value_enum_double, \
 219        .put = snd_soc_dapm_put_value_enum_double, \
 220        .private_value = (unsigned long)&xenum }
 221#define SOC_DAPM_PIN_SWITCH(xname) \
 222{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname " Switch", \
 223        .info = snd_soc_dapm_info_pin_switch, \
 224        .get = snd_soc_dapm_get_pin_switch, \
 225        .put = snd_soc_dapm_put_pin_switch, \
 226        .private_value = (unsigned long)xname }
 227
 228/* dapm stream operations */
 229#define SND_SOC_DAPM_STREAM_NOP                 0x0
 230#define SND_SOC_DAPM_STREAM_START               0x1
 231#define SND_SOC_DAPM_STREAM_STOP                0x2
 232#define SND_SOC_DAPM_STREAM_SUSPEND             0x4
 233#define SND_SOC_DAPM_STREAM_RESUME              0x8
 234#define SND_SOC_DAPM_STREAM_PAUSE_PUSH  0x10
 235#define SND_SOC_DAPM_STREAM_PAUSE_RELEASE       0x20
 236
 237/* dapm event types */
 238#define SND_SOC_DAPM_PRE_PMU    0x1     /* before widget power up */
 239#define SND_SOC_DAPM_POST_PMU   0x2             /* after widget power up */
 240#define SND_SOC_DAPM_PRE_PMD    0x4     /* before widget power down */
 241#define SND_SOC_DAPM_POST_PMD   0x8             /* after widget power down */
 242#define SND_SOC_DAPM_PRE_REG    0x10    /* before audio path setup */
 243#define SND_SOC_DAPM_POST_REG   0x20    /* after audio path setup */
 244
 245/* convenience event type detection */
 246#define SND_SOC_DAPM_EVENT_ON(e)        \
 247        (e & (SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU))
 248#define SND_SOC_DAPM_EVENT_OFF(e)       \
 249        (e & (SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD))
 250
 251struct snd_soc_dapm_widget;
 252enum snd_soc_dapm_type;
 253struct snd_soc_dapm_path;
 254struct snd_soc_dapm_pin;
 255struct snd_soc_dapm_route;
 256
 257int dapm_reg_event(struct snd_soc_dapm_widget *w,
 258                   struct snd_kcontrol *kcontrol, int event);
 259
 260/* dapm controls */
 261int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
 262        struct snd_ctl_elem_value *ucontrol);
 263int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
 264        struct snd_ctl_elem_value *ucontrol);
 265int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
 266        struct snd_ctl_elem_value *ucontrol);
 267int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 268        struct snd_ctl_elem_value *ucontrol);
 269int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
 270        struct snd_ctl_elem_value *ucontrol);
 271int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
 272        struct snd_ctl_elem_value *ucontrol);
 273int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
 274        struct snd_ctl_elem_value *ucontrol);
 275int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
 276        struct snd_ctl_elem_value *ucontrol);
 277int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
 278        struct snd_ctl_elem_info *uinfo);
 279int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
 280        struct snd_ctl_elem_value *uncontrol);
 281int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
 282        struct snd_ctl_elem_value *uncontrol);
 283int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
 284        const struct snd_soc_dapm_widget *widget);
 285int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
 286        const struct snd_soc_dapm_widget *widget,
 287        int num);
 288
 289/* dapm path setup */
 290int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec);
 291void snd_soc_dapm_free(struct snd_soc_device *socdev);
 292int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
 293                            const struct snd_soc_dapm_route *route, int num);
 294
 295/* dapm events */
 296int snd_soc_dapm_stream_event(struct snd_soc_codec *codec, char *stream,
 297        int event);
 298void snd_soc_dapm_shutdown(struct snd_soc_device *socdev);
 299
 300/* dapm sys fs - used by the core */
 301int snd_soc_dapm_sys_add(struct device *dev);
 302void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec);
 303
 304/* dapm audio pin control and status */
 305int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin);
 306int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin);
 307int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin);
 308int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin);
 309int snd_soc_dapm_sync(struct snd_soc_codec *codec);
 310
 311/* dapm widget types */
 312enum snd_soc_dapm_type {
 313        snd_soc_dapm_input = 0,         /* input pin */
 314        snd_soc_dapm_output,            /* output pin */
 315        snd_soc_dapm_mux,                       /* selects 1 analog signal from many inputs */
 316        snd_soc_dapm_value_mux,                 /* selects 1 analog signal from many inputs */
 317        snd_soc_dapm_mixer,                     /* mixes several analog signals together */
 318        snd_soc_dapm_mixer_named_ctl,           /* mixer with named controls */
 319        snd_soc_dapm_pga,                       /* programmable gain/attenuation (volume) */
 320        snd_soc_dapm_adc,                       /* analog to digital converter */
 321        snd_soc_dapm_dac,                       /* digital to analog converter */
 322        snd_soc_dapm_micbias,           /* microphone bias (power) */
 323        snd_soc_dapm_mic,                       /* microphone */
 324        snd_soc_dapm_hp,                        /* headphones */
 325        snd_soc_dapm_spk,                       /* speaker */
 326        snd_soc_dapm_line,                      /* line input/output */
 327        snd_soc_dapm_switch,            /* analog switch */
 328        snd_soc_dapm_vmid,                      /* codec bias/vmid - to minimise pops */
 329        snd_soc_dapm_pre,                       /* machine specific pre widget - exec first */
 330        snd_soc_dapm_post,                      /* machine specific post widget - exec last */
 331        snd_soc_dapm_supply,            /* power/clock supply */
 332        snd_soc_dapm_aif_in,            /* audio interface input */
 333        snd_soc_dapm_aif_out,           /* audio interface output */
 334};
 335
 336/*
 337 * DAPM audio route definition.
 338 *
 339 * Defines an audio route originating at source via control and finishing
 340 * at sink.
 341 */
 342struct snd_soc_dapm_route {
 343        const char *sink;
 344        const char *control;
 345        const char *source;
 346
 347        /* Note: currently only supported for links where source is a supply */
 348        int (*connected)(struct snd_soc_dapm_widget *source,
 349                         struct snd_soc_dapm_widget *sink);
 350};
 351
 352/* dapm audio path between two widgets */
 353struct snd_soc_dapm_path {
 354        char *name;
 355        char *long_name;
 356
 357        /* source (input) and sink (output) widgets */
 358        struct snd_soc_dapm_widget *source;
 359        struct snd_soc_dapm_widget *sink;
 360        struct snd_kcontrol *kcontrol;
 361
 362        /* status */
 363        u32 connect:1;  /* source and sink widgets are connected */
 364        u32 walked:1;   /* path has been walked */
 365
 366        int (*connected)(struct snd_soc_dapm_widget *source,
 367                         struct snd_soc_dapm_widget *sink);
 368
 369        struct list_head list_source;
 370        struct list_head list_sink;
 371        struct list_head list;
 372};
 373
 374/* dapm widget */
 375struct snd_soc_dapm_widget {
 376        enum snd_soc_dapm_type id;
 377        char *name;             /* widget name */
 378        char *sname;    /* stream name */
 379        struct snd_soc_codec *codec;
 380        struct list_head list;
 381
 382        /* dapm control */
 383        short reg;                                              /* negative reg = no direct dapm */
 384        unsigned char shift;                    /* bits to shift */
 385        unsigned int saved_value;               /* widget saved value */
 386        unsigned int value;                             /* widget current value */
 387        unsigned int mask;                      /* non-shifted mask */
 388        unsigned int on_val;                    /* on state value */
 389        unsigned int off_val;                   /* off state value */
 390        unsigned char power:1;                  /* block power status */
 391        unsigned char invert:1;                 /* invert the power bit */
 392        unsigned char active:1;                 /* active stream on DAC, ADC's */
 393        unsigned char connected:1;              /* connected codec pin */
 394        unsigned char new:1;                    /* cnew complete */
 395        unsigned char ext:1;                    /* has external widgets */
 396        unsigned char muted:1;                  /* muted for pop reduction */
 397        unsigned char suspend:1;                /* was active before suspend */
 398        unsigned char pmdown:1;                 /* waiting for timeout */
 399
 400        int (*power_check)(struct snd_soc_dapm_widget *w);
 401
 402        /* external events */
 403        unsigned short event_flags;             /* flags to specify event types */
 404        int (*event)(struct snd_soc_dapm_widget*, struct snd_kcontrol *, int);
 405
 406        /* kcontrols that relate to this widget */
 407        int num_kcontrols;
 408        const struct snd_kcontrol_new *kcontrols;
 409
 410        /* widget input and outputs */
 411        struct list_head sources;
 412        struct list_head sinks;
 413
 414        /* used during DAPM updates */
 415        struct list_head power_list;
 416};
 417
 418#endif
 419