| /* Copyright 2013 The ChromiumOS Authors |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| /* Lid switch module for Chrome EC */ |
| |
| /* |
| * TODO(b/272518464): Work around coreboot GCC preprocessor bug. |
| * #line marks the *next* line, so it is off by one. |
| */ |
| #line 13 |
| |
| #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 "timer.h" |
| #include "util.h" |
| |
| /* Console output macros */ |
| #define CPUTS(outstr) cputs(CC_SWITCH, outstr) |
| #define CPRINTS(format, args...) cprints(CC_SWITCH, format, ##args) |
| |
| /* if no X-macro is defined for LID switch GPIO, use GPIO_LID_OPEN as default */ |
| #ifndef CONFIG_LID_SWITCH_GPIO_LIST |
| #define CONFIG_LID_SWITCH_GPIO_LIST LID_GPIO(GPIO_LID_OPEN) |
| #endif |
| |
| static int debounced_lid_open; /* Debounced lid state */ |
| static int forced_lid_open; /* Forced lid open */ |
| |
| /** |
| * Get raw lid switch state. |
| * |
| * @return 1 if lid is open, 0 if closed. |
| */ |
| static int raw_lid_open(void) |
| { |
| #define LID_GPIO(gpio) || gpio_get_level(gpio) |
| return (forced_lid_open CONFIG_LID_SWITCH_GPIO_LIST) ? 1 : 0; |
| #undef LID_GPIO |
| } |
| |
| /** |
| * Handle lid open. |
| */ |
| static void lid_switch_open(void) |
| { |
| if (debounced_lid_open) { |
| CPRINTS("lid already open"); |
| return; |
| } |
| |
| CPRINTS("lid open"); |
| debounced_lid_open = 1; |
| hook_notify(HOOK_LID_CHANGE); |
| #ifdef CONFIG_HOSTCMD_EVENTS |
| host_set_single_event(EC_HOST_EVENT_LID_OPEN); |
| #endif |
| } |
| |
| /** |
| * Handle lid close. |
| */ |
| static void lid_switch_close(void) |
| { |
| if (!debounced_lid_open) { |
| CPRINTS("lid already closed"); |
| return; |
| } |
| |
| CPRINTS("lid close"); |
| debounced_lid_open = 0; |
| hook_notify(HOOK_LID_CHANGE); |
| #ifdef CONFIG_HOSTCMD_EVENTS |
| host_set_single_event(EC_HOST_EVENT_LID_CLOSED); |
| #endif |
| } |
| |
| test_mockable int lid_is_open(void) |
| { |
| return debounced_lid_open; |
| } |
| |
| /** |
| * Lid switch initialization code |
| */ |
| static void lid_init(void) |
| { |
| if (raw_lid_open()) |
| debounced_lid_open = 1; |
| |
| /* Enable interrupts, now that we've initialized */ |
| #define LID_GPIO(gpio) gpio_enable_interrupt(gpio); |
| CONFIG_LID_SWITCH_GPIO_LIST |
| #undef LID_GPIO |
| } |
| DECLARE_HOOK(HOOK_INIT, lid_init, HOOK_PRIO_INIT_LID); |
| |
| /** |
| * Handle debounced lid switch changing state. |
| */ |
| static void lid_change_deferred(void) |
| { |
| const int new_open = raw_lid_open(); |
| |
| /* If lid hasn't changed state, nothing to do */ |
| if (new_open == debounced_lid_open) |
| return; |
| |
| if (new_open) |
| lid_switch_open(); |
| else |
| lid_switch_close(); |
| } |
| DECLARE_DEFERRED(lid_change_deferred); |
| |
| void lid_interrupt(enum gpio_signal signal) |
| { |
| /* Reset lid debounce time */ |
| hook_call_deferred(&lid_change_deferred_data, LID_DEBOUNCE_US); |
| } |
| |
| void enable_lid_detect(bool enable) |
| { |
| CPRINTS("lid detect %sabled", enable ? "en" : "dis"); |
| if (enable) { |
| #define LID_GPIO(gpio) gpio_enable_interrupt(gpio); |
| CONFIG_LID_SWITCH_GPIO_LIST |
| #undef LID_GPIO |
| } else { |
| #define LID_GPIO(gpio) gpio_disable_interrupt(gpio); |
| CONFIG_LID_SWITCH_GPIO_LIST |
| #undef LID_GPIO |
| lid_switch_open(); |
| } |
| } |
| |
| static int command_lidopen(int argc, const char **argv) |
| { |
| lid_switch_open(); |
| return EC_SUCCESS; |
| } |
| DECLARE_CONSOLE_COMMAND(lidopen, command_lidopen, NULL, "Simulate lid open"); |
| |
| static int command_lidclose(int argc, const char **argv) |
| { |
| lid_switch_close(); |
| return EC_SUCCESS; |
| } |
| DECLARE_CONSOLE_COMMAND(lidclose, command_lidclose, NULL, "Simulate lid close"); |
| |
| static int command_lidstate(int argc, const char **argv) |
| { |
| ccprintf("lid state: %s\n", debounced_lid_open ? "open" : "closed"); |
| |
| return EC_SUCCESS; |
| } |
| DECLARE_CONSOLE_COMMAND(lidstate, command_lidstate, NULL, "Get state of lid"); |
| |
| /** |
| * Host command to enable/disable lid opened. |
| */ |
| static enum ec_status hc_force_lid_open(struct host_cmd_handler_args *args) |
| { |
| const struct ec_params_force_lid_open *p = args->params; |
| int old_state = forced_lid_open; |
| |
| /* Override lid open if necessary */ |
| forced_lid_open = p->enabled ? 1 : 0; |
| |
| /* Make this take effect immediately; no debounce time */ |
| if (forced_lid_open != old_state) |
| hook_call_deferred(&lid_change_deferred_data, 0); |
| |
| return EC_RES_SUCCESS; |
| } |
| DECLARE_HOST_COMMAND(EC_CMD_FORCE_LID_OPEN, hc_force_lid_open, EC_VER_MASK(0)); |
| |
| #if defined(HAS_TASK_KEYSCAN) || defined(CONFIG_CROS_EC_KEYBOARD_INPUT) |
| |
| static void keyboard_lid_change(void) |
| { |
| if (lid_is_open()) { |
| keyboard_scan_enable(1, KB_SCAN_DISABLE_LID_CLOSED); |
| } else { |
| keyboard_scan_enable(0, KB_SCAN_DISABLE_LID_CLOSED); |
| } |
| } |
| DECLARE_HOOK(HOOK_LID_CHANGE, keyboard_lid_change, HOOK_PRIO_DEFAULT); |
| DECLARE_HOOK(HOOK_INIT, keyboard_lid_change, HOOK_PRIO_POST_LID); |
| |
| #endif |