mirror of
https://github.com/Rockbox/rockbox.git
synced 2025-10-14 02:27:39 -04:00
imx233: introduce new generic button driver
This driver will subsume the old button-lradc driver and support far more options. It can sense LRADC channels, PSWITCH, GPIOs and it handles special "buttons" like headphone insertion and hold detection. It also provides a more natural description of the buttons using a target-defined table with some macros to make it easy to read and write. It uniformely handles debouncing on LRADC channels and PSWITCH. Change-Id: Ie61d1f593fdcf3bd456ba1d53a1fd784286834ce
This commit is contained in:
Amaury Pouly
parent
c02bc1afd2
commit
82b86d4316
3 changed files with 436 additions and 0 deletions
|
|
@ -561,6 +561,7 @@ target/arm/imx233/adc-imx233.c
|
||||||
target/arm/imx233/lradc-imx233.c
|
target/arm/imx233/lradc-imx233.c
|
||||||
target/arm/imx233/pwm-imx233.c
|
target/arm/imx233/pwm-imx233.c
|
||||||
target/arm/imx233/rtc-imx233.c
|
target/arm/imx233/rtc-imx233.c
|
||||||
|
target/arm/imx233/button-imx233.c
|
||||||
#if IMX233_SUBTARGET >= 3700
|
#if IMX233_SUBTARGET >= 3700
|
||||||
target/arm/imx233/dcp-imx233.c
|
target/arm/imx233/dcp-imx233.c
|
||||||
#endif
|
#endif
|
||||||
|
|
|
||||||
261
firmware/target/arm/imx233/button-imx233.c
Normal file
261
firmware/target/arm/imx233/button-imx233.c
Normal file
|
|
@ -0,0 +1,261 @@
|
||||||
|
/***************************************************************************
|
||||||
|
* __________ __ ___.
|
||||||
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||||
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||||
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||||
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||||
|
* \/ \/ \/ \/ \/
|
||||||
|
* $Id$
|
||||||
|
*
|
||||||
|
* Copyright (C) 2013 by Amaury Pouly
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public License
|
||||||
|
* as published by the Free Software Foundation; either version 2
|
||||||
|
* of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||||
|
* KIND, either express or implied.
|
||||||
|
*
|
||||||
|
****************************************************************************/
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
|
||||||
|
#include "cpu.h"
|
||||||
|
#include "kernel.h"
|
||||||
|
#include "button-imx233.h"
|
||||||
|
#include "lradc-imx233.h"
|
||||||
|
#include "pinctrl-imx233.h"
|
||||||
|
#include "power-imx233.h"
|
||||||
|
#include "backlight.h"
|
||||||
|
|
||||||
|
static int delay_chan = -1; /* delay channel used to trigger */
|
||||||
|
static int raw_val[LRADC_NUM_CHANNELS]; /* channel values sampled (last two) */
|
||||||
|
static int chan_mask; /* trigger channel mask */
|
||||||
|
static int irq_chan_mask; /* triggered channel mask */
|
||||||
|
static int src_map[LRADC_NUM_SOURCES]; /* physical -> virtual channel map */
|
||||||
|
static int src_mask; /* sampled source mask */
|
||||||
|
#ifdef HAS_BUTTON_HOLD
|
||||||
|
static int hold_idx = -1; /* index of hold button in map */
|
||||||
|
#endif
|
||||||
|
#ifdef HAVE_HEADPHONE_DETECTION
|
||||||
|
static int jack_idx = -1; /* index of jack detect in map */
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* shortcut of button map */
|
||||||
|
#define MAP imx233_button_map
|
||||||
|
|
||||||
|
/* sample rate for LRADC */
|
||||||
|
#define RATE HZ
|
||||||
|
/* number of samples per irq */
|
||||||
|
#define SAMPLES 10
|
||||||
|
/* delay's delay */
|
||||||
|
#define DELAY (LRADC_DELAY_FREQ / RATE / SAMPLES)
|
||||||
|
|
||||||
|
/* correct value for channel with builtin dividers */
|
||||||
|
static int correct_lradc(int src, int raw)
|
||||||
|
{
|
||||||
|
if(src == LRADC_SRC_VDDIO)
|
||||||
|
return raw * 2;
|
||||||
|
else
|
||||||
|
return raw;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* return raw value for the button */
|
||||||
|
int imx233_button_read_raw(int idx)
|
||||||
|
{
|
||||||
|
if(MAP[idx].periph == IMX233_BUTTON_GPIO)
|
||||||
|
return imx233_pinctrl_get_gpio(MAP[idx].u.gpio.bank, MAP[idx].u.gpio.pin);
|
||||||
|
else if(MAP[idx].periph == IMX233_BUTTON_LRADC)
|
||||||
|
return correct_lradc(MAP[idx].u.lradc.src, raw_val[src_map[MAP[idx].u.lradc.src]]);
|
||||||
|
else if(MAP[idx].periph == IMX233_BUTTON_PSWITCH)
|
||||||
|
return imx233_power_read_pswitch();
|
||||||
|
else
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* return cooked (interpreted) value for the button, ignoring debouncing */
|
||||||
|
static bool imx233_button_read_cooked(int idx)
|
||||||
|
{
|
||||||
|
int raw = imx233_button_read_raw(idx);
|
||||||
|
bool res;
|
||||||
|
if(MAP[idx].periph == IMX233_BUTTON_GPIO)
|
||||||
|
{
|
||||||
|
res = raw;
|
||||||
|
}
|
||||||
|
else if(MAP[idx].periph == IMX233_BUTTON_LRADC)
|
||||||
|
{
|
||||||
|
/* correct value in relative mode */
|
||||||
|
int rel = MAP[idx].u.lradc.relative;
|
||||||
|
if(rel != -1)
|
||||||
|
raw = (raw * MAP[rel].u.lradc.value) / imx233_button_read_raw(rel);
|
||||||
|
res = abs(raw - MAP[idx].u.lradc.value) <= 30;
|
||||||
|
}
|
||||||
|
else if(MAP[idx].periph == IMX233_BUTTON_PSWITCH)
|
||||||
|
{
|
||||||
|
res = raw == MAP[idx].u.pswitch.level;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
res = false;
|
||||||
|
/* handle inversion */
|
||||||
|
if(MAP[idx].flags & IMX233_BUTTON_INVERTED)
|
||||||
|
res = !res;
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* finish round */
|
||||||
|
static void do_round(void)
|
||||||
|
{
|
||||||
|
for(int i = 0; MAP[i].btn != IMX233_BUTTON_END; i++)
|
||||||
|
{
|
||||||
|
bool cooked = imx233_button_read_cooked(i);
|
||||||
|
if(MAP[i].last_val == cooked)
|
||||||
|
MAP[i].rounds = MIN(MAP[i].rounds + 1, MAP[i].threshold);
|
||||||
|
else
|
||||||
|
MAP[i].rounds = 1;
|
||||||
|
MAP[i].last_val = cooked;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* process IRQ */
|
||||||
|
static void button_lradc_irq(int chan)
|
||||||
|
{
|
||||||
|
/* read value */
|
||||||
|
raw_val[chan] = imx233_lradc_read_channel(chan) / SAMPLES;
|
||||||
|
imx233_lradc_clear_channel(chan);
|
||||||
|
imx233_lradc_setup_sampling(chan, true, SAMPLES - 1);
|
||||||
|
/* record irq, trigger delay if all IRQs have been fired */
|
||||||
|
irq_chan_mask |= 1 << chan;
|
||||||
|
if(irq_chan_mask == chan_mask)
|
||||||
|
{
|
||||||
|
irq_chan_mask = 0;
|
||||||
|
do_round();
|
||||||
|
imx233_lradc_setup_delay(delay_chan, chan_mask, 0, SAMPLES - 1, DELAY);
|
||||||
|
imx233_lradc_kick_delay(delay_chan);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool imx233_button_read_btn(int idx)
|
||||||
|
{
|
||||||
|
return MAP[idx].rounds >= MAP[idx].threshold ? MAP[idx].last_val : false;
|
||||||
|
}
|
||||||
|
|
||||||
|
int imx233_button_read(int others)
|
||||||
|
{
|
||||||
|
int res = others;
|
||||||
|
#ifdef HAS_BUTTON_HOLD
|
||||||
|
if(imx233_button_read_hold())
|
||||||
|
return 0;
|
||||||
|
#endif
|
||||||
|
for(int i = 0; MAP[i].btn != IMX233_BUTTON_END; i++)
|
||||||
|
{
|
||||||
|
if(MAP[i].btn >= 0 && imx233_button_read_btn(i))
|
||||||
|
res |= MAP[i].btn;
|
||||||
|
}
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef HAS_BUTTON_HOLD
|
||||||
|
bool imx233_button_read_hold(void)
|
||||||
|
{
|
||||||
|
return imx233_button_read_btn(hold_idx);
|
||||||
|
}
|
||||||
|
|
||||||
|
bool __attribute__((weak)) button_hold(void)
|
||||||
|
{
|
||||||
|
bool hold_button = imx233_button_read_hold();
|
||||||
|
#ifndef BOOTLOADER
|
||||||
|
static bool hold_button_old = false;
|
||||||
|
/* light handling */
|
||||||
|
if (hold_button != hold_button_old)
|
||||||
|
{
|
||||||
|
hold_button_old = hold_button;
|
||||||
|
backlight_hold_changed(hold_button);
|
||||||
|
}
|
||||||
|
#endif /* BOOTLOADER */
|
||||||
|
return hold_button;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef HAVE_HEADPHONE_DETECTION
|
||||||
|
bool imx233_button_read_jack(void)
|
||||||
|
{
|
||||||
|
return imx233_button_read_btn(jack_idx);
|
||||||
|
}
|
||||||
|
|
||||||
|
bool __attribute__((weak)) headphones_inserted(void)
|
||||||
|
{
|
||||||
|
return imx233_button_read_jack();
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* return number of debouncing rounds by type of peripheral */
|
||||||
|
static int threshold_by_periph(int periph)
|
||||||
|
{
|
||||||
|
if(periph == IMX233_BUTTON_GPIO) return 1; // no debouncing
|
||||||
|
if(periph == IMX233_BUTTON_LRADC) return 2; // 2 times at HZ gives ~10 ms hold
|
||||||
|
if(periph == IMX233_BUTTON_PSWITCH) return 10; // PSWITCH is very slow to ramp
|
||||||
|
return 1; // other ?
|
||||||
|
}
|
||||||
|
|
||||||
|
void imx233_button_init(void)
|
||||||
|
{
|
||||||
|
/* go through the table and init stuff which needs to be */
|
||||||
|
for(int i = 0; MAP[i].btn != IMX233_BUTTON_END; i++)
|
||||||
|
{
|
||||||
|
MAP[i].threshold = threshold_by_periph(MAP[i].periph);
|
||||||
|
if(MAP[i].periph == IMX233_BUTTON_GPIO)
|
||||||
|
{
|
||||||
|
imx233_pinctrl_acquire(MAP[i].u.gpio.bank, MAP[i].u.gpio.pin, MAP[i].name);
|
||||||
|
imx233_pinctrl_set_function(MAP[i].u.gpio.bank, MAP[i].u.gpio.pin, PINCTRL_FUNCTION_GPIO);
|
||||||
|
imx233_pinctrl_enable_gpio(MAP[i].u.gpio.bank, MAP[i].u.gpio.pin, false);
|
||||||
|
bool pullup = !!(MAP[i].flags & IMX233_BUTTON_PULLUP);
|
||||||
|
imx233_pinctrl_enable_pullup(MAP[i].u.gpio.bank, MAP[i].u.gpio.pin, pullup);
|
||||||
|
}
|
||||||
|
else if(MAP[i].periph == IMX233_BUTTON_LRADC)
|
||||||
|
{
|
||||||
|
int src = MAP[i].u.lradc.src;
|
||||||
|
/* if channel was already acquired, there is nothing to do */
|
||||||
|
if(src_mask & (1 << src))
|
||||||
|
continue;
|
||||||
|
src_map[src] = imx233_lradc_acquire_channel(LRADC_SRC(src), TIMEOUT_NOBLOCK);
|
||||||
|
if(src_map[src] < 0)
|
||||||
|
panicf("Cannot get channel for %s", MAP[i].name);
|
||||||
|
imx233_lradc_setup_source(src_map[src], true, src);
|
||||||
|
imx233_lradc_setup_sampling(src_map[src], true, SAMPLES - 1);
|
||||||
|
imx233_lradc_enable_channel_irq(src_map[src], true);
|
||||||
|
imx233_lradc_set_channel_irq_callback(src_map[src], button_lradc_irq);
|
||||||
|
src_mask |= 1 << src;
|
||||||
|
chan_mask |= 1 << src_map[src];
|
||||||
|
}
|
||||||
|
#ifdef HAS_BUTTON_HOLD
|
||||||
|
if(MAP[i].btn == IMX233_BUTTON_HOLD)
|
||||||
|
hold_idx = i;
|
||||||
|
#endif
|
||||||
|
#ifdef HAVE_HEADPHONE_DETECTION
|
||||||
|
if(MAP[i].btn == IMX233_BUTTON_JACK)
|
||||||
|
jack_idx = i;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
#ifdef HAS_BUTTON_HOLD
|
||||||
|
if(hold_idx == -1)
|
||||||
|
panicf("No hold entry found");
|
||||||
|
#endif
|
||||||
|
#ifdef HAVE_HEADPHONE_DETECTION
|
||||||
|
if(jack_idx == -1)
|
||||||
|
panicf("No jack entry found");
|
||||||
|
#endif
|
||||||
|
/* create delay channel if necessary
|
||||||
|
* NOTE other buttons are polled as part of the delay irq processing */
|
||||||
|
if(src_mask != 0)
|
||||||
|
{
|
||||||
|
delay_chan = imx233_lradc_acquire_delay(TIMEOUT_NOBLOCK);
|
||||||
|
if(delay_chan < 0)
|
||||||
|
panicf("Cannot get delay channel");
|
||||||
|
imx233_lradc_setup_delay(delay_chan, chan_mask, 0, SAMPLES - 1, DELAY);
|
||||||
|
imx233_lradc_kick_delay(delay_chan);
|
||||||
|
}
|
||||||
|
/* otherwise we need to regularly poll for other buttons */
|
||||||
|
else
|
||||||
|
tick_add_task(do_round);
|
||||||
|
}
|
||||||
174
firmware/target/arm/imx233/button-imx233.h
Normal file
174
firmware/target/arm/imx233/button-imx233.h
Normal file
|
|
@ -0,0 +1,174 @@
|
||||||
|
/***************************************************************************
|
||||||
|
* __________ __ ___.
|
||||||
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||||
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||||
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||||
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||||
|
* \/ \/ \/ \/ \/
|
||||||
|
* $Id$
|
||||||
|
*
|
||||||
|
* Copyright (C) 2014 by Amaury Pouly
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public License
|
||||||
|
* as published by the Free Software Foundation; either version 2
|
||||||
|
* of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||||
|
* KIND, either express or implied.
|
||||||
|
*
|
||||||
|
****************************************************************************/
|
||||||
|
#ifndef __button_imx233__
|
||||||
|
#define __button_imx233__
|
||||||
|
|
||||||
|
#include "button.h"
|
||||||
|
#include "button-target.h"
|
||||||
|
#include "lradc-imx233.h"
|
||||||
|
#include "pinctrl-imx233.h"
|
||||||
|
#include "power-imx233.h"
|
||||||
|
|
||||||
|
/* special values for .btn field */
|
||||||
|
#define IMX233_BUTTON_END -1 /* end of the list */
|
||||||
|
#define IMX233_BUTTON_HOLD -2 /* HOLD button */
|
||||||
|
#define IMX233_BUTTON_JACK -3 /* JACK detect */
|
||||||
|
#define IMX233_BUTTON_VDDIO -4 /* VDDIO value */
|
||||||
|
|
||||||
|
/* values for .periph field */
|
||||||
|
#define IMX233_BUTTON_GPIO 0 /* GPIO pin */
|
||||||
|
#define IMX233_BUTTON_LRADC 1 /* LRADC channel */
|
||||||
|
#define IMX233_BUTTON_PSWITCH 2 /* PSWITCH */
|
||||||
|
|
||||||
|
/* values for the .flags field */
|
||||||
|
#define IMX233_BUTTON_INVERTED (1 << 0) /* invert button detection */
|
||||||
|
#define IMX233_BUTTON_PULLUP (1 << 1) /* pin needs a pullup (GPIO) */
|
||||||
|
|
||||||
|
/** target-defined
|
||||||
|
* NOTE for proper operation:
|
||||||
|
* - the table must end which a dummy entry of type IMX233_BUTTON_END
|
||||||
|
* - default is active: high for GPIO, around value for LRADC, exact value for PSWITCH
|
||||||
|
* - inverted flags reverses the above behaviour
|
||||||
|
* - if lradc channel is relative, the .relative field specify a entry in the
|
||||||
|
* button table to which it is relative. This entry must have <0 .btn value
|
||||||
|
* and be of type LRADC. For example, if a channel is VDDIO relative, set
|
||||||
|
* .relative to IMX233_BUTTON_VDDIO and create an entry which .btn set to
|
||||||
|
* IMX233_BUTTON_VDDIO, channel set to VDDIO source and value set to the ideal values
|
||||||
|
* for which no correction is necessary. Note that the IMX233_BUTTON_VDDIO value is
|
||||||
|
* defined for convenience */
|
||||||
|
struct imx233_button_map_t
|
||||||
|
{
|
||||||
|
int btn; /* target button or magic value (END, HOLD, JACK) */
|
||||||
|
int periph; /* GPIO, LRADC, or PSWITCH, ... */
|
||||||
|
union
|
||||||
|
{
|
||||||
|
struct
|
||||||
|
{
|
||||||
|
int bank;
|
||||||
|
int pin;
|
||||||
|
}gpio;
|
||||||
|
struct
|
||||||
|
{
|
||||||
|
int src; /* source channel */
|
||||||
|
int value; /* expected value */
|
||||||
|
int relative; /* button to which it is relative or -1 if none */
|
||||||
|
}lradc;
|
||||||
|
struct
|
||||||
|
{
|
||||||
|
int level; /* value of the PSWITCH field: low, mid, high */
|
||||||
|
}pswitch;
|
||||||
|
}u;
|
||||||
|
int flags; /* flags */
|
||||||
|
const char *name; /* name of the button */
|
||||||
|
/** private fields */
|
||||||
|
bool last_val; /* last interpreted value */
|
||||||
|
int rounds; /* how many rounds it survived (debouncing) */
|
||||||
|
int threshold; /* round threshold for acceptance */
|
||||||
|
};
|
||||||
|
|
||||||
|
/* macros for the common cases */
|
||||||
|
#define IMX233_BUTTON_PATH_GPIO(bank_, pin_) .periph = IMX233_BUTTON_GPIO, \
|
||||||
|
.u = {.gpio = {.bank = bank_, .pin = pin_}}
|
||||||
|
#define IMX233_BUTTON_PATH_LRADC_REL(src_, val_, rel_) .periph = IMX233_BUTTON_LRADC, \
|
||||||
|
.u = {.lradc = {.src = src_, .value = val_, .relative = rel_}}
|
||||||
|
#define IMX233_BUTTON_PATH_LRADC(src_, val_) IMX233_BUTTON_PATH_LRADC_REL(src_, val_, -1)
|
||||||
|
#define IMX233_BUTTON_PATH_PSWITCH(lvl_) .periph = IMX233_BUTTON_PSWITCH, \
|
||||||
|
.u = {.pswitch = {.level = lvl_}}
|
||||||
|
#define IMX233_BUTTON_PATH_END() .periph = -1
|
||||||
|
/* special macro for VDDIO, for convenience */
|
||||||
|
#define IMX233_BUTTON_PATH_VDDIO(val_) IMX233_BUTTON_PATH_LRADC(LRADC_SRC_VDDIO, val_)
|
||||||
|
|
||||||
|
#define IMX233_BUTTON_NAMEFLAGS1(_,name_) .name = name_
|
||||||
|
#define IMX233_BUTTON_NAMEFLAGS2(_,name_,f1) .name = name_, .flags = IMX233_BUTTON_##f1
|
||||||
|
#define IMX233_BUTTON_NAMEFLAGS3(_,name_,f1,f2) .name = name_, \
|
||||||
|
.flags = IMX233_BUTTON_##f1 | IMX233_BUTTON_##f2
|
||||||
|
#define IMX233_BUTTON_NAMEFLAGS4(_,name_,f1,f2,f3) .name = name_, \
|
||||||
|
.flags =IMX233_BUTTON_##f1 | IMX233_BUTTON_##f2 | IMX233_BUTTON_##f3
|
||||||
|
|
||||||
|
#define IMX233_BUTTON__(btn_, path_, ...) \
|
||||||
|
{.btn = btn_, IMX233_BUTTON_PATH_##path_, \
|
||||||
|
REG_VARIADIC(IMX233_BUTTON_NAMEFLAGS, dummy, __VA_ARGS__)}
|
||||||
|
#define IMX233_BUTTON_(btn_, path_, ...) \
|
||||||
|
IMX233_BUTTON__(IMX233_BUTTON_##btn_, path_, __VA_ARGS__)
|
||||||
|
#define IMX233_BUTTON(btn_, path_, ...) \
|
||||||
|
IMX233_BUTTON__(BUTTON_##btn_, path_, __VA_ARGS__)
|
||||||
|
|
||||||
|
#define IMX233_BUTTON_END_() \
|
||||||
|
{.btn = IMX233_BUTTON_END}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* This header provides macro to ease definition of buttons. There three types of
|
||||||
|
* buttons:
|
||||||
|
* - normal buttons: BUTTON_X -> defined using IMX233_BUTTON(X, ...)
|
||||||
|
* - special buttons IMX233_BUTTON_X -> defined using IMX233_BUTTON_(X, ...)
|
||||||
|
* - others: X -> defined using IMX233_BUTTON__(X, ...)
|
||||||
|
* A definition contains three mandatory parts and a fourth optional:
|
||||||
|
* IMX233_BUTTON(btn, path_spec, name [, flags])
|
||||||
|
* The path_spec can be of the form:
|
||||||
|
* - GPIO(bank, pin)
|
||||||
|
* - LRADC(src, value)
|
||||||
|
* - LRADC_REL(src, value, rel_idx)
|
||||||
|
* - PSWITCH(level)
|
||||||
|
* - END()
|
||||||
|
* The optional flags are specified as a list, without the IMX233_BUTTON_ prefix.
|
||||||
|
* Examples:
|
||||||
|
* - BUTTON_POWER named "power", mapped to PSWITCH mid level, no flags:
|
||||||
|
* IMX233_BUTTON(POWER, PSWICTH(1), "power")
|
||||||
|
* - IMX233_BUTTON_JACK named "jack", mapped to GPIO B2P17 inverted and pullup:
|
||||||
|
* IMX233_BUTTON_(JACK, GPIO(2, 17), "jack", INVERTED, PULLUP)
|
||||||
|
* - BIZARRE named "bizarre", mapped to LRADC channel 0, expected value 42:
|
||||||
|
* IMX233_BUTTON__(BIZARRE, LRADC(0, 42), "bizarre")
|
||||||
|
* - BUTTON_PLAY named "play", mapped to LRADc channel 2, expected value 300 related
|
||||||
|
* to button entry IDX
|
||||||
|
* IMX233_BUTTON(PLAY, LRADC_REL(2, 300, IDX), "play")
|
||||||
|
* - VDDIO entry, expected value 4000 (for relative entries):
|
||||||
|
* IMX233_BUTTON_(VDDIO, VDDIO(4000), "vddio")
|
||||||
|
* - last entry:
|
||||||
|
* IMX233_BUTTON_(END, END(), "")
|
||||||
|
*
|
||||||
|
* The driver also provides default implementations for headphones_inserted()
|
||||||
|
* and button_hold() which can be overriden since they have weak linkage.
|
||||||
|
*/
|
||||||
|
|
||||||
|
extern struct imx233_button_map_t imx233_button_map[];
|
||||||
|
|
||||||
|
/* initialise button driver */
|
||||||
|
void imx233_button_init(void);
|
||||||
|
/* others gives the bitmask of other buttons: the function will OR the result
|
||||||
|
* with them except if hold is detected in which case 0 is always returned */
|
||||||
|
int imx233_button_read(int others);
|
||||||
|
#ifdef HAS_BUTTON_HOLD
|
||||||
|
bool imx233_button_read_hold(void);
|
||||||
|
bool button_hold(void);
|
||||||
|
#endif
|
||||||
|
#ifdef HAVE_HEADPHONE_DETECTION
|
||||||
|
bool imx233_button_read_jack(void);
|
||||||
|
bool headphones_inserted(void);
|
||||||
|
#endif
|
||||||
|
/* return interpreted button value, after processing.
|
||||||
|
* Argument is an index into the imx233_button_map table */
|
||||||
|
bool imx233_button_read_btn(int idx);
|
||||||
|
/* return raw value for a button, before any processing: GPIO state, LRADC
|
||||||
|
* channel value, PSWITCH value. Return -1 if there is no match.
|
||||||
|
* Argument is an index into the imx233_button_map table */
|
||||||
|
int imx233_button_read_raw(int idx);
|
||||||
|
|
||||||
|
#endif /* __button_imx233__ */
|
||||||
Loading…
Add table
Add a link
Reference in a new issue