mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-06 23:51:28 +00:00
3344c8e2e6
Refactored keyboard scan enable/disable flag such that it is a mask of potential disable sources. When all disable sources are off, scanning is enabled, otherwise scanning is disabled. This fixes a recently introduced bug in which enabling/disabling keyboard scanning due to lid angle in S3 was interfering with enabling/disabling keyboard scanning due to power button. This also allows for easy expansion for future causes for disabling keyboard scanning. BUG=chrome-os-partner:27851 BRANCH=rambi TEST=Manual tests with a glimmer. Used the ksstate console command to check state of keyboard scanning under all permutations of power button pressed/unpressed, lid switch open/closed, and lid angle in tablet position vs. laptop positon. Change-Id: Ied4c5ebb94510b1078cd81d71373c0f1bd0d6678 Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/194287 Reviewed-by: Randall Spangler <rspangler@chromium.org>
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* Power button module for Chrome EC */
|
|
|
|
#include "common.h"
|
|
#include "console.h"
|
|
#include "gpio.h"
|
|
#include "hooks.h"
|
|
#include "host_command.h"
|
|
#include "keyboard_scan.h"
|
|
#include "lid_switch.h"
|
|
#include "power_button.h"
|
|
#include "timer.h"
|
|
#include "util.h"
|
|
|
|
/* Console output macros */
|
|
#define CPUTS(outstr) cputs(CC_SWITCH, outstr)
|
|
#define CPRINTF(format, args...) cprintf(CC_SWITCH, format, ## args)
|
|
|
|
#define PWRBTN_DEBOUNCE_US (30 * MSEC) /* Debounce time for power button */
|
|
|
|
static int debounced_power_pressed; /* Debounced power button state */
|
|
static int simulate_power_pressed;
|
|
|
|
/**
|
|
* Get raw power button signal state.
|
|
*
|
|
* @return 1 if power button is pressed, 0 if not pressed.
|
|
*/
|
|
static int raw_power_button_pressed(void)
|
|
{
|
|
if (simulate_power_pressed)
|
|
return 1;
|
|
|
|
#ifndef CONFIG_POWER_BUTTON_IGNORE_LID
|
|
/*
|
|
* Always indicate power button released if the lid is closed.
|
|
* This prevents waking the system if the device is squashed enough to
|
|
* press the power button through the closed lid.
|
|
*/
|
|
if (!lid_is_open())
|
|
return 0;
|
|
#endif
|
|
|
|
return gpio_get_level(GPIO_POWER_BUTTON_L) ? 0 : 1;
|
|
}
|
|
|
|
int power_button_is_pressed(void)
|
|
{
|
|
return debounced_power_pressed;
|
|
}
|
|
|
|
/**
|
|
* Handle power button initialization.
|
|
*/
|
|
static void power_button_init(void)
|
|
{
|
|
if (raw_power_button_pressed())
|
|
debounced_power_pressed = 1;
|
|
|
|
/* Enable interrupts, now that we've initialized */
|
|
gpio_enable_interrupt(GPIO_POWER_BUTTON_L);
|
|
}
|
|
DECLARE_HOOK(HOOK_INIT, power_button_init, HOOK_PRIO_INIT_POWER_BUTTON);
|
|
|
|
/**
|
|
* Handle debounced power button changing state.
|
|
*/
|
|
static void power_button_change_deferred(void)
|
|
{
|
|
const int new_pressed = raw_power_button_pressed();
|
|
|
|
/* Re-enable keyboard scanning if power button is no longer pressed */
|
|
if (!new_pressed)
|
|
keyboard_scan_enable(1, KB_SCAN_DISABLE_POWER_BUTTON);
|
|
|
|
/* If power button hasn't changed state, nothing to do */
|
|
if (new_pressed == debounced_power_pressed)
|
|
return;
|
|
|
|
debounced_power_pressed = new_pressed;
|
|
|
|
CPRINTF("[%T power button %s]\n", new_pressed ? "pressed" : "released");
|
|
|
|
/* Call hooks */
|
|
hook_notify(HOOK_POWER_BUTTON_CHANGE);
|
|
|
|
/* Notify host if power button has been pressed */
|
|
if (new_pressed)
|
|
host_set_single_event(EC_HOST_EVENT_POWER_BUTTON);
|
|
}
|
|
DECLARE_DEFERRED(power_button_change_deferred);
|
|
|
|
void power_button_interrupt(enum gpio_signal signal)
|
|
{
|
|
/*
|
|
* If power button is pressed, disable the matrix scan as soon as
|
|
* possible to reduce the risk of false-reboot triggered by those keys
|
|
* on the same column with refresh key.
|
|
*/
|
|
if (raw_power_button_pressed())
|
|
keyboard_scan_enable(0, KB_SCAN_DISABLE_POWER_BUTTON);
|
|
|
|
/* Reset power button debounce time */
|
|
hook_call_deferred(power_button_change_deferred, PWRBTN_DEBOUNCE_US);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Console commands */
|
|
|
|
static int command_powerbtn(int argc, char **argv)
|
|
{
|
|
int ms = 200; /* Press duration in ms */
|
|
char *e;
|
|
|
|
if (argc > 1) {
|
|
ms = strtoi(argv[1], &e, 0);
|
|
if (*e)
|
|
return EC_ERROR_PARAM1;
|
|
}
|
|
|
|
ccprintf("Simulating %d ms power button press.\n", ms);
|
|
simulate_power_pressed = 1;
|
|
hook_call_deferred(power_button_change_deferred, 0);
|
|
|
|
msleep(ms);
|
|
|
|
ccprintf("Simulating power button release.\n");
|
|
simulate_power_pressed = 0;
|
|
hook_call_deferred(power_button_change_deferred, 0);
|
|
|
|
return EC_SUCCESS;
|
|
}
|
|
DECLARE_CONSOLE_COMMAND(powerbtn, command_powerbtn,
|
|
"[msec]",
|
|
"Simulate power button press",
|
|
NULL);
|
|
|