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root/include/sound/soc-dapm.h

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/*
 * 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>
#include <sound/soc.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_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_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}

/* 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_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_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}

/* 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_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_ADC(wname, stname, wreg, wshift, winvert) \
{       .id = snd_soc_dapm_adc, .name = wname, .sname = stname, .reg = wreg, \
        .shift = wshift, .invert = winvert}

/* generic register modifier widget */
#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}

/* 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_DOUBLE(xname, reg, shift_left, shift_right, max, invert, \
        power) \
{       .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 = (reg) | ((shift_left) << 8) | ((shift_right) << 12) |\
                ((max) << 16) | ((invert) << 24) }
#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_DOUBLE_TLV(xname, reg, shift_left, shift_right, max, invert, \
        power, tlv_array) \
{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
        .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,\
        .tlv.p = (tlv_array), \
        .info = snd_soc_info_volsw, \
        .get = snd_soc_dapm_get_volsw, .put = snd_soc_dapm_put_volsw, \
        .private_value = (reg) | ((shift_left) << 8) | ((shift_right) << 12) |\
                ((max) << 16) | ((invert) << 24) }
#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 }

/* 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 */

/* 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;

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_new_control(struct snd_soc_codec *codec,
        const struct snd_soc_dapm_widget *widget);
int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
        const struct snd_soc_dapm_widget *widget,
        int num);

/* dapm path setup */
int  __deprecated snd_soc_dapm_connect_input(struct snd_soc_codec *codec,
        const char *sink_name, const char *control_name, const char *src_name);
int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec);
void snd_soc_dapm_free(struct snd_soc_device *socdev);
int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
                            const struct snd_soc_dapm_route *route, int num);

/* dapm events */
int snd_soc_dapm_stream_event(struct snd_soc_codec *codec, char *stream,
        int event);
int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
        enum snd_soc_bias_level level);

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

/* dapm audio pin control and status */
int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, char *pin);
int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, char *pin);
int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, char *pin);
int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, char *pin);
int snd_soc_dapm_sync(struct snd_soc_codec *codec);

/* 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_mixer,                     /* mixes several analog signals together */
        snd_soc_dapm_pga,                       /* programmable gain/attenuation (volume) */
        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 */
};

/*
 * 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;
};

/* 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 */

        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 list_head list;

        /* 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 muted:1;                  /* muted for pop reduction */
        unsigned char suspend:1;                /* was active before suspend */
        unsigned char pmdown:1;                 /* waiting for timeout */

        /* 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;
};

#endif

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