| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Input Power Event -> APM Bridge |
| * |
| * Copyright (c) 2007 Richard Purdie |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/module.h> |
| #include <linux/input.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/tty.h> |
| #include <linux/delay.h> |
| #include <linux/pm.h> |
| #include <linux/apm-emulation.h> |
| |
| static void system_power_event(unsigned int keycode) |
| { |
| switch (keycode) { |
| case KEY_SUSPEND: |
| apm_queue_event(APM_USER_SUSPEND); |
| pr_info("Requesting system suspend...\n"); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void apmpower_event(struct input_handle *handle, unsigned int type, |
| unsigned int code, int value) |
| { |
| /* only react on key down events */ |
| if (value != 1) |
| return; |
| |
| switch (type) { |
| case EV_PWR: |
| system_power_event(code); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| static int apmpower_connect(struct input_handler *handler, |
| struct input_dev *dev, |
| const struct input_device_id *id) |
| { |
| struct input_handle *handle; |
| int error; |
| |
| handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); |
| if (!handle) |
| return -ENOMEM; |
| |
| handle->dev = dev; |
| handle->handler = handler; |
| handle->name = "apm-power"; |
| |
| error = input_register_handle(handle); |
| if (error) { |
| pr_err("Failed to register input power handler, error %d\n", |
| error); |
| kfree(handle); |
| return error; |
| } |
| |
| error = input_open_device(handle); |
| if (error) { |
| pr_err("Failed to open input power device, error %d\n", error); |
| input_unregister_handle(handle); |
| kfree(handle); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static void apmpower_disconnect(struct input_handle *handle) |
| { |
| input_close_device(handle); |
| input_unregister_handle(handle); |
| kfree(handle); |
| } |
| |
| static const struct input_device_id apmpower_ids[] = { |
| { |
| .flags = INPUT_DEVICE_ID_MATCH_EVBIT, |
| .evbit = { BIT_MASK(EV_PWR) }, |
| }, |
| { }, |
| }; |
| |
| MODULE_DEVICE_TABLE(input, apmpower_ids); |
| |
| static struct input_handler apmpower_handler = { |
| .event = apmpower_event, |
| .connect = apmpower_connect, |
| .disconnect = apmpower_disconnect, |
| .name = "apm-power", |
| .id_table = apmpower_ids, |
| }; |
| |
| static int __init apmpower_init(void) |
| { |
| return input_register_handler(&apmpower_handler); |
| } |
| |
| static void __exit apmpower_exit(void) |
| { |
| input_unregister_handler(&apmpower_handler); |
| } |
| |
| module_init(apmpower_init); |
| module_exit(apmpower_exit); |
| |
| MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); |
| MODULE_DESCRIPTION("Input Power Event -> APM Bridge"); |
| MODULE_LICENSE("GPL"); |