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soc-dapm.h

/*
 * linux/sound/soc-dapm.h -- ALSA SoC Dynamic Audio Power Management
 *
 * Author:        Liam Girdwood
 * Created:       Aug 11th 2005
 * Copyright:     Wolfson Microelectronics. PLC.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __LINUX_SND_SOC_DAPM_H
#define __LINUX_SND_SOC_DAPM_H

#include <linux/device.h>
#include <linux/types.h>
#include <sound/control.h>

/* widget has no PM register bit */
#define SND_SOC_NOPM    -1

/*
 * SoC dynamic audio power management
 *
 * We can have upto 4 power domains
 *    1. Codec domain - VREF, VMID
 *     Usually controlled at codec probe/remove, although can be set
 *     at stream time if power is not needed for sidetone, etc.
 *  2. Platform/Machine domain - physically connected inputs and outputs
 *     Is platform/machine and user action specific, is set in the machine
 *     driver and by userspace e.g when HP are inserted
 *  3. Path domain - Internal codec path mixers
 *     Are automatically set when mixer and mux settings are
 *     changed by the user.
 *  4. Stream domain - DAC's and ADC's.
 *     Enabled when stream playback/capture is started.
 */

/* codec domain */
#define SND_SOC_DAPM_VMID(wname) \
{     .id = snd_soc_dapm_vmid, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0}

/* platform domain */
#define SND_SOC_DAPM_INPUT(wname) \
{     .id = snd_soc_dapm_input, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0}
#define SND_SOC_DAPM_OUTPUT(wname) \
{     .id = snd_soc_dapm_output, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0}
#define SND_SOC_DAPM_MIC(wname, wevent) \
{     .id = snd_soc_dapm_mic, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0, .event = wevent, \
      .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD}
#define SND_SOC_DAPM_HP(wname, wevent) \
{     .id = snd_soc_dapm_hp, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0, .event = wevent, \
      .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
#define SND_SOC_DAPM_SPK(wname, wevent) \
{     .id = snd_soc_dapm_spk, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0, .event = wevent, \
      .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}
#define SND_SOC_DAPM_LINE(wname, wevent) \
{     .id = snd_soc_dapm_line, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0, .event = wevent, \
      .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD}

/* path domain */
#define SND_SOC_DAPM_PGA(wname, wreg, wshift, winvert,\
       wcontrols, wncontrols) \
{     .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_OUT_DRV(wname, wreg, wshift, winvert,\
       wcontrols, wncontrols) \
{     .id = snd_soc_dapm_out_drv, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_MIXER(wname, wreg, wshift, winvert, \
       wcontrols, wncontrols)\
{     .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_MIXER_NAMED_CTL(wname, wreg, wshift, winvert, \
       wcontrols, wncontrols)\
{       .id = snd_soc_dapm_mixer_named_ctl, .name = wname, .reg = wreg, \
      .shift = wshift, .invert = winvert, .kcontrols = wcontrols, \
      .num_kcontrols = wncontrols}
#define SND_SOC_DAPM_MICBIAS(wname, wreg, wshift, winvert) \
{     .id = snd_soc_dapm_micbias, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = NULL, .num_kcontrols = 0}
#define SND_SOC_DAPM_SWITCH(wname, wreg, wshift, winvert, wcontrols) \
{     .id = snd_soc_dapm_switch, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_MUX(wname, wreg, wshift, winvert, wcontrols) \
{     .id = snd_soc_dapm_mux, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_VIRT_MUX(wname, wreg, wshift, winvert, wcontrols) \
{     .id = snd_soc_dapm_virt_mux, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1}
#define SND_SOC_DAPM_VALUE_MUX(wname, wreg, wshift, winvert, wcontrols) \
{     .id = snd_soc_dapm_value_mux, .name = wname, .reg = wreg, \
      .shift = wshift, .invert = winvert, .kcontrols = wcontrols, \
      .num_kcontrols = 1}

/* Simplified versions of above macros, assuming wncontrols = ARRAY_SIZE(wcontrols) */
#define SOC_PGA_ARRAY(wname, wreg, wshift, winvert,\
       wcontrols) \
{     .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols)}
#define SOC_MIXER_ARRAY(wname, wreg, wshift, winvert, \
       wcontrols)\
{     .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols)}
#define SOC_MIXER_NAMED_CTL_ARRAY(wname, wreg, wshift, winvert, \
       wcontrols)\
{       .id = snd_soc_dapm_mixer_named_ctl, .name = wname, .reg = wreg, \
      .shift = wshift, .invert = winvert, .kcontrols = wcontrols, \
      .num_kcontrols = ARRAY_SIZE(wcontrols)}

/* path domain with event - event handler must return 0 for success */
#define SND_SOC_DAPM_PGA_E(wname, wreg, wshift, winvert, wcontrols, \
      wncontrols, wevent, wflags) \
{     .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_OUT_DRV_E(wname, wreg, wshift, winvert, wcontrols, \
      wncontrols, wevent, wflags) \
{     .id = snd_soc_dapm_out_drv, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MIXER_E(wname, wreg, wshift, winvert, wcontrols, \
      wncontrols, wevent, wflags) \
{     .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = wncontrols, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MIXER_NAMED_CTL_E(wname, wreg, wshift, winvert, \
      wcontrols, wncontrols, wevent, wflags) \
{       .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, \
      .num_kcontrols = wncontrols, .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MICBIAS_E(wname, wreg, wshift, winvert, wevent, wflags) \
{     .id = snd_soc_dapm_micbias, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = NULL, .num_kcontrols = 0, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_SWITCH_E(wname, wreg, wshift, winvert, wcontrols, \
      wevent, wflags) \
{     .id = snd_soc_dapm_switch, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_MUX_E(wname, wreg, wshift, winvert, wcontrols, \
      wevent, wflags) \
{     .id = snd_soc_dapm_mux, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_VIRT_MUX_E(wname, wreg, wshift, winvert, wcontrols, \
      wevent, wflags) \
{     .id = snd_soc_dapm_virt_mux, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = 1, \
      .event = wevent, .event_flags = wflags}

/* Simplified versions of above macros, assuming wncontrols = ARRAY_SIZE(wcontrols) */
#define SOC_PGA_E_ARRAY(wname, wreg, wshift, winvert, wcontrols, \
      wevent, wflags) \
{     .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols), \
      .event = wevent, .event_flags = wflags}
#define SOC_MIXER_E_ARRAY(wname, wreg, wshift, winvert, wcontrols, \
      wevent, wflags) \
{     .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, .num_kcontrols = ARRAY_SIZE(wcontrols), \
      .event = wevent, .event_flags = wflags}
#define SOC_MIXER_NAMED_CTL_E_ARRAY(wname, wreg, wshift, winvert, \
      wcontrols, wevent, wflags) \
{       .id = snd_soc_dapm_mixer, .name = wname, .reg = wreg, .shift = wshift, \
      .invert = winvert, .kcontrols = wcontrols, \
      .num_kcontrols = ARRAY_SIZE(wcontrols), .event = wevent, .event_flags = wflags}

/* events that are pre and post DAPM */
#define SND_SOC_DAPM_PRE(wname, wevent) \
{     .id = snd_soc_dapm_pre, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0, .event = wevent, \
      .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD}
#define SND_SOC_DAPM_POST(wname, wevent) \
{     .id = snd_soc_dapm_post, .name = wname, .kcontrols = NULL, \
      .num_kcontrols = 0, .event = wevent, \
      .event_flags = SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD}

/* stream domain */
#define SND_SOC_DAPM_AIF_IN(wname, stname, wslot, wreg, wshift, winvert) \
{     .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
      .reg = wreg, .shift = wshift, .invert = winvert }
#define SND_SOC_DAPM_AIF_IN_E(wname, stname, wslot, wreg, wshift, winvert, \
                        wevent, wflags)                     \
{     .id = snd_soc_dapm_aif_in, .name = wname, .sname = stname, \
      .reg = wreg, .shift = wshift, .invert = winvert, \
      .event = wevent, .event_flags = wflags }
#define SND_SOC_DAPM_AIF_OUT(wname, stname, wslot, wreg, wshift, winvert) \
{     .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
      .reg = wreg, .shift = wshift, .invert = winvert }
#define SND_SOC_DAPM_AIF_OUT_E(wname, stname, wslot, wreg, wshift, winvert, \
                       wevent, wflags)                      \
{     .id = snd_soc_dapm_aif_out, .name = wname, .sname = stname, \
      .reg = wreg, .shift = wshift, .invert = winvert, \
      .event = wevent, .event_flags = wflags }
#define SND_SOC_DAPM_DAC(wname, stname, wreg, wshift, winvert) \
{     .id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
      .shift = wshift, .invert = winvert}
#define SND_SOC_DAPM_DAC_E(wname, stname, wreg, wshift, winvert, \
                     wevent, wflags)                        \
{     .id = snd_soc_dapm_dac, .name = wname, .sname = stname, .reg = wreg, \
      .shift = wshift, .invert = winvert, \
      .event = wevent, .event_flags = wflags}
#define SND_SOC_DAPM_ADC(wname, stname, wreg, wshift, winvert) \
{     .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
      .shift = wshift, .invert = winvert}
#define SND_SOC_DAPM_ADC_E(wname, stname, wreg, wshift, winvert, \
                     wevent, wflags)                        \
{     .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
      .shift = wshift, .invert = winvert, \
      .event = wevent, .event_flags = wflags}

/* generic widgets */
#define SND_SOC_DAPM_REG(wid, wname, wreg, wshift, wmask, won_val, woff_val) \
{     .id = wid, .name = wname, .kcontrols = NULL, .num_kcontrols = 0, \
      .reg = -((wreg) + 1), .shift = wshift, .mask = wmask, \
      .on_val = won_val, .off_val = woff_val, .event = dapm_reg_event, \
      .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD}
#define SND_SOC_DAPM_SUPPLY(wname, wreg, wshift, winvert, wevent, wflags) \
{     .id = snd_soc_dapm_supply, .name = wname, .reg = wreg,      \
      .shift = wshift, .invert = winvert, .event = wevent, \
      .event_flags = wflags}

/* dapm kcontrol types */
#define SOC_DAPM_SINGLE(xname, reg, shift, max, invert) \
{     .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
      .info = snd_soc_info_volsw, \
      .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
      .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
#define SOC_DAPM_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
{     .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
      .info = snd_soc_info_volsw, \
      .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,\
      .tlv.p = (tlv_array), \
      .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
      .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
#define SOC_DAPM_ENUM(xname, xenum) \
{     .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
      .info = snd_soc_info_enum_double, \
      .get = snd_soc_dapm_get_enum_double, \
      .put = snd_soc_dapm_put_enum_double, \
      .private_value = (unsigned long)&xenum }
#define SOC_DAPM_ENUM_VIRT(xname, xenum)            \
{     .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
      .info = snd_soc_info_enum_double, \
      .get = snd_soc_dapm_get_enum_virt, \
      .put = snd_soc_dapm_put_enum_virt, \
      .private_value = (unsigned long)&xenum }
#define SOC_DAPM_VALUE_ENUM(xname, xenum) \
{     .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
      .info = snd_soc_info_enum_double, \
      .get = snd_soc_dapm_get_value_enum_double, \
      .put = snd_soc_dapm_put_value_enum_double, \
      .private_value = (unsigned long)&xenum }
#define SOC_DAPM_PIN_SWITCH(xname) \
{     .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname " Switch", \
      .info = snd_soc_dapm_info_pin_switch, \
      .get = snd_soc_dapm_get_pin_switch, \
      .put = snd_soc_dapm_put_pin_switch, \
      .private_value = (unsigned long)xname }

/* dapm stream operations */
#define SND_SOC_DAPM_STREAM_NOP                 0x0
#define SND_SOC_DAPM_STREAM_START         0x1
#define SND_SOC_DAPM_STREAM_STOP          0x2
#define SND_SOC_DAPM_STREAM_SUSPEND       0x4
#define SND_SOC_DAPM_STREAM_RESUME        0x8
#define SND_SOC_DAPM_STREAM_PAUSE_PUSH    0x10
#define SND_SOC_DAPM_STREAM_PAUSE_RELEASE 0x20

/* dapm event types */
#define SND_SOC_DAPM_PRE_PMU  0x1   /* before widget power up */
#define SND_SOC_DAPM_POST_PMU 0x2         /* after widget power up */
#define SND_SOC_DAPM_PRE_PMD  0x4   /* before widget power down */
#define SND_SOC_DAPM_POST_PMD 0x8         /* after widget power down */
#define SND_SOC_DAPM_PRE_REG  0x10  /* before audio path setup */
#define SND_SOC_DAPM_POST_REG 0x20  /* after audio path setup */
#define SND_SOC_DAPM_PRE_POST_PMD \
                        (SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD)

/* convenience event type detection */
#define SND_SOC_DAPM_EVENT_ON(e)    \
      (e & (SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU))
#define SND_SOC_DAPM_EVENT_OFF(e)   \
      (e & (SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD))

struct snd_soc_dapm_widget;
enum snd_soc_dapm_type;
struct snd_soc_dapm_path;
struct snd_soc_dapm_pin;
struct snd_soc_dapm_route;
struct snd_soc_dapm_context;

int dapm_reg_event(struct snd_soc_dapm_widget *w,
               struct snd_kcontrol *kcontrol, int event);

/* dapm controls */
int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_info *uinfo);
int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *uncontrol);
int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *uncontrol);
int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
      const struct snd_soc_dapm_widget *widget);
int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
      const struct snd_soc_dapm_widget *widget,
      int num);

/* dapm path setup */
int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm);
void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm);
int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
                      const struct snd_soc_dapm_route *route, int num);

/* dapm events */
int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
      const char *stream, int event);
void snd_soc_dapm_shutdown(struct snd_soc_card *card);

/* dapm sys fs - used by the core */
int snd_soc_dapm_sys_add(struct device *dev);
void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm);

/* dapm audio pin control and status */
int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm,
                      const char *pin);
int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
                       const char *pin);
int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin);
int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
                        const char *pin);
int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm);
int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
                          const char *pin);
int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
                        const char *pin);

/* dapm widget types */
enum snd_soc_dapm_type {
      snd_soc_dapm_input = 0,       /* input pin */
      snd_soc_dapm_output,          /* output pin */
      snd_soc_dapm_mux,             /* selects 1 analog signal from many inputs */
      snd_soc_dapm_virt_mux,              /* virtual version of snd_soc_dapm_mux */
      snd_soc_dapm_value_mux,             /* selects 1 analog signal from many inputs */
      snd_soc_dapm_mixer,                 /* mixes several analog signals together */
      snd_soc_dapm_mixer_named_ctl,       /* mixer with named controls */
      snd_soc_dapm_pga,             /* programmable gain/attenuation (volume) */
      snd_soc_dapm_out_drv,               /* output driver */
      snd_soc_dapm_adc,             /* analog to digital converter */
      snd_soc_dapm_dac,             /* digital to analog converter */
      snd_soc_dapm_micbias,         /* microphone bias (power) */
      snd_soc_dapm_mic,             /* microphone */
      snd_soc_dapm_hp,              /* headphones */
      snd_soc_dapm_spk,             /* speaker */
      snd_soc_dapm_line,                  /* line input/output */
      snd_soc_dapm_switch,          /* analog switch */
      snd_soc_dapm_vmid,                  /* codec bias/vmid - to minimise pops */
      snd_soc_dapm_pre,             /* machine specific pre widget - exec first */
      snd_soc_dapm_post,                  /* machine specific post widget - exec last */
      snd_soc_dapm_supply,          /* power/clock supply */
      snd_soc_dapm_aif_in,          /* audio interface input */
      snd_soc_dapm_aif_out,         /* audio interface output */
};

/*
 * DAPM audio route definition.
 *
 * Defines an audio route originating at source via control and finishing
 * at sink.
 */
00396 struct snd_soc_dapm_route {
      const char *sink;
      const char *control;
      const char *source;

      /* Note: currently only supported for links where source is a supply */
      int (*connected)(struct snd_soc_dapm_widget *source,
                   struct snd_soc_dapm_widget *sink);
};

/* dapm audio path between two widgets */
00407 struct snd_soc_dapm_path {
      char *name;
      char *long_name;

      /* source (input) and sink (output) widgets */
      struct snd_soc_dapm_widget *source;
      struct snd_soc_dapm_widget *sink;
      struct snd_kcontrol *kcontrol;

      /* status */
      u32 connect:1;    /* source and sink widgets are connected */
      u32 walked:1;     /* path has been walked */

      int (*connected)(struct snd_soc_dapm_widget *source,
                   struct snd_soc_dapm_widget *sink);

      struct list_head list_source;
      struct list_head list_sink;
      struct list_head list;
};

/* dapm widget */
00429 struct snd_soc_dapm_widget {
      enum snd_soc_dapm_type id;
      char *name;       /* widget name */
      char *sname;      /* stream name */
      struct snd_soc_codec *codec;
      struct list_head list;
      struct snd_soc_dapm_context *dapm;

      /* dapm control */
      short reg;                                /* negative reg = no direct dapm */
      unsigned char shift;                /* bits to shift */
      unsigned int saved_value;           /* widget saved value */
      unsigned int value;                       /* widget current value */
      unsigned int mask;                  /* non-shifted mask */
      unsigned int on_val;                /* on state value */
      unsigned int off_val;               /* off state value */
      unsigned char power:1;              /* block power status */
      unsigned char invert:1;             /* invert the power bit */
      unsigned char active:1;             /* active stream on DAC, ADC's */
      unsigned char connected:1;          /* connected codec pin */
      unsigned char new:1;                /* cnew complete */
      unsigned char ext:1;                /* has external widgets */
      unsigned char force:1;              /* force state */
      unsigned char ignore_suspend:1;         /* kept enabled over suspend */

      int (*power_check)(struct snd_soc_dapm_widget *w);

      /* external events */
      unsigned short event_flags;         /* flags to specify event types */
      int (*event)(struct snd_soc_dapm_widget*, struct snd_kcontrol *, int);

      /* kcontrols that relate to this widget */
      int num_kcontrols;
      const struct snd_kcontrol_new *kcontrols;

      /* widget input and outputs */
      struct list_head sources;
      struct list_head sinks;

      /* used during DAPM updates */
      struct list_head power_list;
};

00472 struct snd_soc_dapm_update {
      struct snd_soc_dapm_widget *widget;
      struct snd_kcontrol *kcontrol;
      int reg;
      int mask;
      int val;
};

/* DAPM context */
00481 struct snd_soc_dapm_context {
      int n_widgets; /* number of widgets in this context */
      enum snd_soc_bias_level bias_level;
      enum snd_soc_bias_level suspend_bias_level;
      struct delayed_work delayed_work;
      unsigned int idle_bias_off:1; /* Use BIAS_OFF instead of STANDBY */

      struct snd_soc_dapm_update *update;

      struct device *dev; /* from parent - for debug */
      struct snd_soc_codec *codec; /* parent codec */
      struct snd_soc_card *card; /* parent card */

      /* used during DAPM updates */
      int dev_power;
      struct list_head list;

#ifdef CONFIG_DEBUG_FS
      struct dentry *debugfs_dapm;
#endif
};

#endif

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