/*
 * 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 up to 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, .kcontrol_news = NULL, \
        .num_kcontrols = 0}

/* platform domain */
#define SND_SOC_DAPM_INPUT(wname) \
{       .id = snd_soc_dapm_input, .name = wname, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_OUTPUT(wname) \
{       .id = snd_soc_dapm_output, .name = wname, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM }
#define SND_SOC_DAPM_MIC(wname, wevent) \
{       .id = snd_soc_dapm_mic, .name = wname, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM, .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, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM, .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, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM, .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, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM, .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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = wcontrols, .num_kcontrols = 1, \
        .event = wevent, .event_flags = wflags}

/* additional sequencing control within an event type */
#define SND_SOC_DAPM_PGA_S(wname, wsubseq, wreg, wshift, winvert, \
        wevent, wflags) \
{       .id = snd_soc_dapm_pga, .name = wname, .reg = wreg, .shift = wshift, \
        .invert = winvert, .event = wevent, .event_flags = wflags, \
        .subseq = wsubseq}
#define SND_SOC_DAPM_SUPPLY_S(wname, wsubseq, wreg, wshift, winvert, wevent, \
        wflags) \
{       .id = snd_soc_dapm_supply, .name = wname, .reg = wreg,  \
        .shift = wshift, .invert = winvert, .event = wevent, \
        .event_flags = wflags, .subseq = wsubseq}

/* 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = 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, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM, .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, .kcontrol_news = NULL, \
        .num_kcontrols = 0, .reg = SND_SOC_NOPM, .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, .kcontrol_news = 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_ENUM_EXT(xname, xenum, xget, xput) \
{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
        .info = snd_soc_info_enum_double, \
        .get = xget, \
        .put = xput, \
        .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);
int snd_soc_dapm_weak_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,
                                struct dentry *parent);

/* 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);

/* Mostly internal - should not normally be used */
void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason);

/* 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.
 */
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 */
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 */
        u32 weak:1;     /* path ignored for power management */

        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 */
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 snd_soc_platform *platform;
        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 */
        unsigned char new_power:1;              /* power from this run */
        unsigned char power_checked:1;          /* power checked this run */
        int subseq;                             /* sort within widget type */

        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 *kcontrol_news;
        struct snd_kcontrol **kcontrols;

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

        /* used during DAPM updates */
        struct list_head power_list;
        struct list_head dirty;
        int inputs;
        int outputs;
};

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

/* DAPM context */
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;

        void (*seq_notifier)(struct snd_soc_dapm_context *,
                             enum snd_soc_dapm_type, int);

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

        /* used during DAPM updates */
        enum snd_soc_bias_level target_bias_level;
        struct list_head list;

        int (*stream_event)(struct snd_soc_dapm_context *dapm, int event);

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

/* A list of widgets associated with an object, typically a snd_kcontrol */
struct snd_soc_dapm_widget_list {
        int num_widgets;
        struct snd_soc_dapm_widget *widgets[0];
};

struct snd_soc_dapm_stats {
        int power_checks;
        int path_checks;
        int neighbour_checks;
};

#endif