/* * Airplane mode button for HP & Xiaomi laptops * * Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/input.h> #include <linux/platform_device.h> #include <linux/acpi.h> #include <acpi/acpi_bus.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alex Hung"); MODULE_ALIAS("acpi*:HPQ6001:*"); MODULE_ALIAS("acpi*:WSTADEF:*"); static struct input_dev *hpwl_input_dev; static const struct acpi_device_id hpwl_ids[] = { {"HPQ6001", 0}, {"WSTADEF", 0}, {"", 0}, }; static int hp_wireless_input_setup(void) { int err; hpwl_input_dev = input_allocate_device(); if (!hpwl_input_dev) return -ENOMEM; hpwl_input_dev->name = "HP Wireless hotkeys"; hpwl_input_dev->phys = "hpq6001/input0"; hpwl_input_dev->id.bustype = BUS_HOST; hpwl_input_dev->evbit[0] = BIT(EV_KEY); set_bit(KEY_RFKILL, hpwl_input_dev->keybit); err = input_register_device(hpwl_input_dev); if (err) goto err_free_dev; return 0; err_free_dev: input_free_device(hpwl_input_dev); return err; } static void hp_wireless_input_destroy(void) { input_unregister_device(hpwl_input_dev); } static void hpwl_notify(struct acpi_device *acpi_dev, u32 event) { if (event != 0x80) { pr_info("Received unknown event (0x%x)\n", event); return; } input_report_key(hpwl_input_dev, KEY_RFKILL, 1); input_sync(hpwl_input_dev); input_report_key(hpwl_input_dev, KEY_RFKILL, 0); input_sync(hpwl_input_dev); } static int hpwl_add(struct acpi_device *device) { int err; err = hp_wireless_input_setup(); if (err) pr_err("Failed to setup hp wireless hotkeys\n"); return err; } static int hpwl_remove(struct acpi_device *device) { hp_wireless_input_destroy(); return 0; } static struct acpi_driver hpwl_driver = { .name = "hp-wireless", .owner = THIS_MODULE, .ids = hpwl_ids, .ops = { .add = hpwl_add, .remove = hpwl_remove, .notify = hpwl_notify, }, }; module_acpi_driver(hpwl_driver);