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/* Copyright 2016 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.
*/
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "lid_angle.h"
#include "tablet_mode.h"
#include "timer.h"
#define CPRINTS(format, args...) cprints(CC_MOTION_LID, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_MOTION_LID, format, ## args)
/* 1: in tablet mode. 0: otherwise */
static int tablet_mode = 1;
int tablet_get_mode(void)
{
return tablet_mode;
}
void tablet_set_mode(int mode)
{
if (tablet_mode == mode)
return;
tablet_mode = mode;
CPRINTS("tablet mode %sabled", mode ? "en" : "dis");
hook_notify(HOOK_TABLET_MODE_CHANGE);
}
/* This ifdef can be removed once we clean up past projects which do own init */
#ifdef CONFIG_TABLET_SWITCH
#ifndef TABLET_MODE_GPIO_L
#error TABLET_MODE_GPIO_L must be defined
#endif
static void tablet_mode_debounce(void)
{
/* We won't reach here on boards without a dedicated tablet switch */
tablet_set_mode(!gpio_get_level(TABLET_MODE_GPIO_L));
#ifdef CONFIG_LID_ANGLE_UPDATE
/* Then, we disable peripherals only when the lid reaches 360 position.
* (It's probably already disabled by motion_sense_task.)
* We deliberately do not enable peripherals when the lid is leaving
* 360 position. Instead, we let motion_sense_task enable it once it
* reaches laptop zone (180 or less). */
if (tablet_mode)
lid_angle_peripheral_enable(0);
#endif /* CONFIG_LID_ANGLE_UPDATE */
}
DECLARE_DEFERRED(tablet_mode_debounce);
#define TABLET_DEBOUNCE_US (30 * MSEC) /* Debounce time for tablet switch */
void tablet_mode_isr(enum gpio_signal signal)
{
hook_call_deferred(&tablet_mode_debounce_data, TABLET_DEBOUNCE_US);
}
static void tablet_mode_init(void)
{
gpio_enable_interrupt(TABLET_MODE_GPIO_L);
/* Ensure tablet mode is initialized according to the hardware state
* so that the cached state reflects reality. */
tablet_mode_debounce();
}
DECLARE_HOOK(HOOK_INIT, tablet_mode_init, HOOK_PRIO_DEFAULT);
#endif
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