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a0bfc0c669
BUG=chrome-os-partner:19236 TEST=Pass both tests BRANCH=None CQ-DEPEND=CL:50467 Change-Id: I59cc407c2d1bf7f549ff9c46226cf7fa60fe7157 Signed-off-by: Vic Yang <victoryang@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/50466
128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Lid switch module for Chrome EC */
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#include "common.h"
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "host_command.h"
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#include "lid_switch.h"
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#include "timer.h"
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#include "util.h"
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/* Console output macros */
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#define CPUTS(outstr) cputs(CC_SWITCH, outstr)
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#define CPRINTF(format, args...) cprintf(CC_SWITCH, format, ## args)
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#define LID_DEBOUNCE_US (30 * MSEC) /* Debounce time for lid switch */
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static int debounced_lid_open; /* Debounced lid state */
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/**
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* Get raw lid switch state.
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*
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* @return 1 if lid is open, 0 if closed.
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*/
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static int raw_lid_open(void)
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{
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return gpio_get_level(GPIO_LID_OPEN) ? 1 : 0;
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}
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/**
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* Handle lid open.
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*/
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static void lid_switch_open(void)
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{
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if (debounced_lid_open) {
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CPRINTF("[%T lid already open]\n");
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return;
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}
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CPRINTF("[%T lid open]\n");
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debounced_lid_open = 1;
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hook_notify(HOOK_LID_CHANGE);
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host_set_single_event(EC_HOST_EVENT_LID_OPEN);
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}
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/**
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* Handle lid close.
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*/
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static void lid_switch_close(void)
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{
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if (!debounced_lid_open) {
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CPRINTF("[%T lid already closed]\n");
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return;
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}
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CPRINTF("[%T lid close]\n");
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debounced_lid_open = 0;
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hook_notify(HOOK_LID_CHANGE);
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host_set_single_event(EC_HOST_EVENT_LID_CLOSED);
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}
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test_mockable int lid_is_open(void)
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{
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return debounced_lid_open;
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}
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/**
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* Lid switch initialization code
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*/
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static void lid_init(void)
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{
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if (raw_lid_open())
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debounced_lid_open = 1;
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/* Enable interrupts, now that we've initialized */
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gpio_enable_interrupt(GPIO_LID_OPEN);
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}
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DECLARE_HOOK(HOOK_INIT, lid_init, HOOK_PRIO_INIT_LID);
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/**
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* Handle debounced lid switch changing state.
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*/
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static void lid_change_deferred(void)
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{
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const int new_open = raw_lid_open();
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/* If lid hasn't changed state, nothing to do */
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if (new_open == debounced_lid_open)
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return;
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if (new_open)
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lid_switch_open();
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else
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lid_switch_close();
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}
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DECLARE_DEFERRED(lid_change_deferred);
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void lid_interrupt(enum gpio_signal signal)
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{
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/* Reset lid debounce time */
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hook_call_deferred(lid_change_deferred, LID_DEBOUNCE_US);
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}
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static int command_lidopen(int argc, char **argv)
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{
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lid_switch_open();
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(lidopen, command_lidopen,
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NULL,
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"Simulate lid open",
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NULL);
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static int command_lidclose(int argc, char **argv)
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{
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lid_switch_close();
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(lidclose, command_lidclose,
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NULL,
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"Simulate lid close",
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NULL);
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