c5e160ff34
The WMI driver core already makes sure that: - a valid WMI device is passed to each callback - the notify() callback runs after the probe() callback succeeds Remove the unnecessary NULL checks. Compile-tested only. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20240402143059.8456-3-W_Armin@gmx.de Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* WMI driver for Xiaomi Laptops */
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/wmi.h>
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#include <uapi/linux/input-event-codes.h>
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#define XIAOMI_KEY_FN_ESC_0 "A2095CCE-0491-44E7-BA27-F8ED8F88AA86"
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#define XIAOMI_KEY_FN_ESC_1 "7BBE8E39-B486-473D-BA13-66F75C5805CD"
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#define XIAOMI_KEY_FN_FN "409B028D-F06B-4C7C-8BBB-EE133A6BD87E"
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#define XIAOMI_KEY_CAPSLOCK "83FE7607-053A-4644-822A-21532C621FC7"
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#define XIAOMI_KEY_FN_F7 "76E9027C-95D0-4180-8692-DA6747DD1C2D"
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#define XIAOMI_DEVICE(guid, key) \
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.guid_string = (guid), \
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.context = &(const unsigned int){key}
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struct xiaomi_wmi {
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struct input_dev *input_dev;
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struct mutex key_lock; /* Protects the key event sequence */
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unsigned int key_code;
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};
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static void xiaomi_mutex_destroy(void *data)
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{
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struct mutex *lock = data;
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mutex_destroy(lock);
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}
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static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
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{
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struct xiaomi_wmi *data;
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int ret;
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if (!context)
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return -EINVAL;
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data = devm_kzalloc(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL);
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if (data == NULL)
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return -ENOMEM;
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dev_set_drvdata(&wdev->dev, data);
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mutex_init(&data->key_lock);
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ret = devm_add_action_or_reset(&wdev->dev, xiaomi_mutex_destroy, &data->key_lock);
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if (ret < 0)
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return ret;
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data->input_dev = devm_input_allocate_device(&wdev->dev);
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if (data->input_dev == NULL)
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return -ENOMEM;
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data->input_dev->name = "Xiaomi WMI keys";
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data->input_dev->phys = "wmi/input0";
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data->key_code = *((const unsigned int *)context);
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set_bit(EV_KEY, data->input_dev->evbit);
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set_bit(data->key_code, data->input_dev->keybit);
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return input_register_device(data->input_dev);
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}
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static void xiaomi_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
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{
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struct xiaomi_wmi *data = dev_get_drvdata(&wdev->dev);
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mutex_lock(&data->key_lock);
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input_report_key(data->input_dev, data->key_code, 1);
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input_sync(data->input_dev);
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input_report_key(data->input_dev, data->key_code, 0);
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input_sync(data->input_dev);
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mutex_unlock(&data->key_lock);
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}
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static const struct wmi_device_id xiaomi_wmi_id_table[] = {
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// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_0, KEY_FN_ESC) },
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// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_1, KEY_FN_ESC) },
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{ XIAOMI_DEVICE(XIAOMI_KEY_FN_FN, KEY_PROG1) },
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// { XIAOMI_DEVICE(XIAOMI_KEY_CAPSLOCK, KEY_CAPSLOCK) },
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{ XIAOMI_DEVICE(XIAOMI_KEY_FN_F7, KEY_CUT) },
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/* Terminating entry */
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{ }
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};
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static struct wmi_driver xiaomi_wmi_driver = {
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.driver = {
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.name = "xiaomi-wmi",
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},
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.id_table = xiaomi_wmi_id_table,
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.probe = xiaomi_wmi_probe,
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.notify = xiaomi_wmi_notify,
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.no_singleton = true,
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};
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module_wmi_driver(xiaomi_wmi_driver);
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MODULE_DEVICE_TABLE(wmi, xiaomi_wmi_id_table);
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MODULE_AUTHOR("Mattias Jacobsson");
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MODULE_DESCRIPTION("Xiaomi WMI driver");
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MODULE_LICENSE("GPL v2");
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