projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| a558ea42 ML |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* | |
| 3 | * Airplane mode button for AMD, HP & Xiaomi laptops | |
| 4 | * | |
| 5 | * Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com> | |
| 6 | * Copyright (C) 2021 Advanced Micro Devices | |
| 7 | */ | |
| 8 | ||
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/module.h> | |
| 11 | #include <linux/init.h> | |
| 12 | #include <linux/input.h> | |
| 13 | #include <linux/platform_device.h> | |
| 14 | #include <linux/acpi.h> | |
| 15 | #include <acpi/acpi_bus.h> | |
| 16 | ||
| 17 | MODULE_LICENSE("GPL"); | |
| 18 | MODULE_AUTHOR("Alex Hung"); | |
| 19 | MODULE_ALIAS("acpi*:HPQ6001:*"); | |
| 20 | MODULE_ALIAS("acpi*:WSTADEF:*"); | |
| 21 | MODULE_ALIAS("acpi*:AMDI0051:*"); | |
| 22 | ||
| 23 | static struct input_dev *wl_input_dev; | |
| 24 | ||
| 25 | static const struct acpi_device_id wl_ids[] = { | |
| 26 | {"HPQ6001", 0}, | |
| 27 | {"WSTADEF", 0}, | |
| 28 | {"AMDI0051", 0}, | |
| 29 | {"", 0}, | |
| 30 | }; | |
| 31 | ||
| 32 | static int wireless_input_setup(void) | |
| 33 | { | |
| 34 | int err; | |
| 35 | ||
| 36 | wl_input_dev = input_allocate_device(); | |
| 37 | if (!wl_input_dev) | |
| 38 | return -ENOMEM; | |
| 39 | ||
| 40 | wl_input_dev->name = "Wireless hotkeys"; | |
| 41 | wl_input_dev->phys = "hpq6001/input0"; | |
| 42 | wl_input_dev->id.bustype = BUS_HOST; | |
| 43 | wl_input_dev->evbit[0] = BIT(EV_KEY); | |
| 44 | set_bit(KEY_RFKILL, wl_input_dev->keybit); | |
| 45 | ||
| 46 | err = input_register_device(wl_input_dev); | |
| 47 | if (err) | |
| 48 | goto err_free_dev; | |
| 49 | ||
| 50 | return 0; | |
| 51 | ||
| 52 | err_free_dev: | |
| 53 | input_free_device(wl_input_dev); | |
| 54 | return err; | |
| 55 | } | |
| 56 | ||
| 57 | static void wireless_input_destroy(void) | |
| 58 | { | |
| 59 | input_unregister_device(wl_input_dev); | |
| 60 | } | |
| 61 | ||
| 62 | static void wl_notify(struct acpi_device *acpi_dev, u32 event) | |
| 63 | { | |
| 64 | if (event != 0x80) { | |
| 65 | pr_info("Received unknown event (0x%x)\n", event); | |
| 66 | return; | |
| 67 | } | |
| 68 | ||
| 69 | input_report_key(wl_input_dev, KEY_RFKILL, 1); | |
| 70 | input_sync(wl_input_dev); | |
| 71 | input_report_key(wl_input_dev, KEY_RFKILL, 0); | |
| 72 | input_sync(wl_input_dev); | |
| 73 | } | |
| 74 | ||
| 75 | static int wl_add(struct acpi_device *device) | |
| 76 | { | |
| 77 | int err; | |
| 78 | ||
| 79 | err = wireless_input_setup(); | |
| 80 | if (err) | |
| 23e9592b | 81 | pr_err("Failed to setup wireless hotkeys\n"); |
| a558ea42 ML |
82 | |
| 83 | return err; | |
| 84 | } | |
| 85 | ||
| 86 | static int wl_remove(struct acpi_device *device) | |
| 87 | { | |
| 88 | wireless_input_destroy(); | |
| 89 | return 0; | |
| 90 | } | |
| 91 | ||
| 92 | static struct acpi_driver wl_driver = { | |
| 93 | .name = "wireless-hotkey", | |
| 94 | .owner = THIS_MODULE, | |
| 95 | .ids = wl_ids, | |
| 96 | .ops = { | |
| 97 | .add = wl_add, | |
| 98 | .remove = wl_remove, | |
| 99 | .notify = wl_notify, | |
| 100 | }, | |
| 101 | }; | |
| 102 | ||
| 103 | module_acpi_driver(wl_driver); |