diff options
Diffstat (limited to 'drivers/platform/x86/lenovo-wmi-camera.c')
| -rw-r--r-- | drivers/platform/x86/lenovo-wmi-camera.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/drivers/platform/x86/lenovo-wmi-camera.c b/drivers/platform/x86/lenovo-wmi-camera.c deleted file mode 100644 index eb60fb9a5b3f..000000000000 --- a/drivers/platform/x86/lenovo-wmi-camera.c +++ /dev/null @@ -1,146 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Lenovo WMI Camera Button Driver - * - * Author: Ai Chao <aichao@kylinos.cn> - * Copyright (C) 2024 KylinSoft Corporation. - */ - -#include <linux/acpi.h> -#include <linux/device.h> -#include <linux/input.h> -#include <linux/types.h> -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/wmi.h> -#include <linux/cleanup.h> - -#define WMI_LENOVO_CAMERABUTTON_EVENT_GUID "50C76F1F-D8E4-D895-0A3D-62F4EA400013" - -struct lenovo_wmi_priv { - struct input_dev *idev; - struct mutex notify_lock; /* lenovo WMI camera button notify lock */ -}; - -enum { - SW_CAMERA_OFF = 0, - SW_CAMERA_ON = 1, -}; - -static int camera_shutter_input_setup(struct wmi_device *wdev, u8 camera_mode) -{ - struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); - int err; - - priv->idev = input_allocate_device(); - if (!priv->idev) - return -ENOMEM; - - priv->idev->name = "Lenovo WMI Camera Button"; - priv->idev->phys = "wmi/input0"; - priv->idev->id.bustype = BUS_HOST; - priv->idev->dev.parent = &wdev->dev; - - input_set_capability(priv->idev, EV_SW, SW_CAMERA_LENS_COVER); - - input_report_switch(priv->idev, SW_CAMERA_LENS_COVER, - camera_mode == SW_CAMERA_ON ? 0 : 1); - input_sync(priv->idev); - - err = input_register_device(priv->idev); - if (err) { - input_free_device(priv->idev); - priv->idev = NULL; - } - - return err; -} - -static void lenovo_wmi_notify(struct wmi_device *wdev, union acpi_object *obj) -{ - struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); - u8 camera_mode; - - if (obj->type != ACPI_TYPE_BUFFER) { - dev_err(&wdev->dev, "Bad response type %u\n", obj->type); - return; - } - - if (obj->buffer.length != 1) { - dev_err(&wdev->dev, "Invalid buffer length %u\n", obj->buffer.length); - return; - } - - /* - * obj->buffer.pointer[0] is camera mode: - * 0 camera close - * 1 camera open - */ - camera_mode = obj->buffer.pointer[0]; - if (camera_mode > SW_CAMERA_ON) { - dev_err(&wdev->dev, "Unknown camera mode %u\n", camera_mode); - return; - } - - guard(mutex)(&priv->notify_lock); - - if (!priv->idev) { - if (camera_shutter_input_setup(wdev, camera_mode)) - dev_warn(&wdev->dev, "Failed to register input device\n"); - return; - } - - if (camera_mode == SW_CAMERA_ON) - input_report_switch(priv->idev, SW_CAMERA_LENS_COVER, 0); - else - input_report_switch(priv->idev, SW_CAMERA_LENS_COVER, 1); - input_sync(priv->idev); -} - -static int lenovo_wmi_probe(struct wmi_device *wdev, const void *context) -{ - struct lenovo_wmi_priv *priv; - - priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - dev_set_drvdata(&wdev->dev, priv); - - mutex_init(&priv->notify_lock); - - return 0; -} - -static void lenovo_wmi_remove(struct wmi_device *wdev) -{ - struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); - - if (priv->idev) - input_unregister_device(priv->idev); - - mutex_destroy(&priv->notify_lock); -} - -static const struct wmi_device_id lenovo_wmi_id_table[] = { - { .guid_string = WMI_LENOVO_CAMERABUTTON_EVENT_GUID }, - { } -}; -MODULE_DEVICE_TABLE(wmi, lenovo_wmi_id_table); - -static struct wmi_driver lenovo_wmi_driver = { - .driver = { - .name = "lenovo-wmi-camera", - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - }, - .id_table = lenovo_wmi_id_table, - .no_singleton = true, - .probe = lenovo_wmi_probe, - .notify = lenovo_wmi_notify, - .remove = lenovo_wmi_remove, -}; -module_wmi_driver(lenovo_wmi_driver); - -MODULE_AUTHOR("Ai Chao <aichao@kylinos.cn>"); -MODULE_DESCRIPTION("Lenovo WMI Camera Button Driver"); -MODULE_LICENSE("GPL"); |