diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/platform/x86/wireless-hotkey.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/platform/x86/wireless-hotkey.c b/drivers/platform/x86/wireless-hotkey.c new file mode 100644 index 000000000..11c60a273 --- /dev/null +++ b/drivers/platform/x86/wireless-hotkey.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Airplane mode button for AMD, HP & Xiaomi laptops + * + * Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com> + * Copyright (C) 2021 Advanced Micro Devices + */ + +#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:*"); +MODULE_ALIAS("acpi*:AMDI0051:*"); + +static struct input_dev *wl_input_dev; + +static const struct acpi_device_id wl_ids[] = { + {"HPQ6001", 0}, + {"WSTADEF", 0}, + {"AMDI0051", 0}, + {"", 0}, +}; + +static int wireless_input_setup(void) +{ + int err; + + wl_input_dev = input_allocate_device(); + if (!wl_input_dev) + return -ENOMEM; + + wl_input_dev->name = "Wireless hotkeys"; + wl_input_dev->phys = "hpq6001/input0"; + wl_input_dev->id.bustype = BUS_HOST; + wl_input_dev->evbit[0] = BIT(EV_KEY); + set_bit(KEY_RFKILL, wl_input_dev->keybit); + + err = input_register_device(wl_input_dev); + if (err) + goto err_free_dev; + + return 0; + +err_free_dev: + input_free_device(wl_input_dev); + return err; +} + +static void wireless_input_destroy(void) +{ + input_unregister_device(wl_input_dev); +} + +static void wl_notify(struct acpi_device *acpi_dev, u32 event) +{ + if (event != 0x80) { + pr_info("Received unknown event (0x%x)\n", event); + return; + } + + input_report_key(wl_input_dev, KEY_RFKILL, 1); + input_sync(wl_input_dev); + input_report_key(wl_input_dev, KEY_RFKILL, 0); + input_sync(wl_input_dev); +} + +static int wl_add(struct acpi_device *device) +{ + int err; + + err = wireless_input_setup(); + if (err) + pr_err("Failed to setup wireless hotkeys\n"); + + return err; +} + +static int wl_remove(struct acpi_device *device) +{ + wireless_input_destroy(); + return 0; +} + +static struct acpi_driver wl_driver = { + .name = "wireless-hotkey", + .owner = THIS_MODULE, + .ids = wl_ids, + .ops = { + .add = wl_add, + .remove = wl_remove, + .notify = wl_notify, + }, +}; + +module_acpi_driver(wl_driver); |