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a834638b29
Add a X-macro CONFIG_LID_SWITCH_GPIO_LIST to be able to optionally specify more than one GPIO to check to find out whether the lid is open. By default, use GPIO_LID_OPEN as before. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=smaug BUG=chrome-os-partner:42110 TEST=on Smaug EVT2, define CONFIG_LID_SWITCH_GPIO_LIST as LID_GPIO(GPIO_LID_OPEN) LID_GPIO(GPIO_BASE_PRES_L) and play with magnets and the genuine lid, check we get the right "lid open" / "lid close" messages on the console. Change-Id: I9e7c67bb39f36f254d31d5861d535d69db754faa Reviewed-on: https://chromium-review.googlesource.com/287852 Trybot-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Alec Berg <alecaberg@chromium.org> Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
156 lines
3.3 KiB
C
156 lines
3.3 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 CPRINTS(format, args...) cprints(CC_SWITCH, format, ## args)
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#define LID_DEBOUNCE_US (30 * MSEC) /* Debounce time for lid switch */
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/* if no X-macro is defined for LID switch GPIO, use GPIO_LID_OPEN as default */
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#ifndef CONFIG_LID_SWITCH_GPIO_LIST
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#define CONFIG_LID_SWITCH_GPIO_LIST LID_GPIO(GPIO_LID_OPEN)
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#endif
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static int debounced_lid_open; /* Debounced lid state */
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static int forced_lid_open; /* Forced lid open */
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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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#define LID_GPIO(gpio) || gpio_get_level(gpio)
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return (forced_lid_open CONFIG_LID_SWITCH_GPIO_LIST) ? 1 : 0;
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#undef LID_GPIO
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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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CPRINTS("lid already open");
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return;
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}
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CPRINTS("lid open");
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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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CPRINTS("lid already closed");
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return;
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}
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CPRINTS("lid close");
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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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#define LID_GPIO(gpio) gpio_enable_interrupt(gpio);
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CONFIG_LID_SWITCH_GPIO_LIST
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#undef LID_GPIO
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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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/**
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* Host command to enable/disable lid opened.
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*/
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static int hc_force_lid_open(struct host_cmd_handler_args *args)
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{
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const struct ec_params_force_lid_open *p = args->params;
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/* Override lid open if necessary */
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forced_lid_open = p->enabled ? 1 : 0;
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/* Make this take effect immediately; no debounce time */
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hook_call_deferred(lid_change_deferred, 0);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_FORCE_LID_OPEN, hc_force_lid_open,
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EC_VER_MASK(0));
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