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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * wmi.h - ACPI WMI interface
4 *
5 * Copyright (c) 2015 Andrew Lutomirski
6 */
7
8#ifndef _LINUX_WMI_H
9#define _LINUX_WMI_H
10
11#include <linux/device.h>
12#include <linux/acpi.h>
13#include <linux/mod_devicetable.h>
14#include <uapi/linux/wmi.h>
15
16struct wmi_device {
17 struct device dev;
18
19 /* True for data blocks implementing the Set Control Method */
20 bool setable;
21};
22
23/* evaluate the ACPI method associated with this device */
24extern acpi_status wmidev_evaluate_method(struct wmi_device *wdev,
25 u8 instance, u32 method_id,
26 const struct acpi_buffer *in,
27 struct acpi_buffer *out);
28
29/* Caller must kfree the result. */
30extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
31 u8 instance);
32
33extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
34
35struct wmi_driver {
36 struct device_driver driver;
37 const struct wmi_device_id *id_table;
38
39 int (*probe)(struct wmi_device *wdev, const void *context);
40 int (*remove)(struct wmi_device *wdev);
41 void (*notify)(struct wmi_device *device, union acpi_object *data);
42 long (*filter_callback)(struct wmi_device *wdev, unsigned int cmd,
43 struct wmi_ioctl_buffer *arg);
44};
45
46extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
47 struct module *owner);
48extern void wmi_driver_unregister(struct wmi_driver *driver);
49#define wmi_driver_register(driver) __wmi_driver_register((driver), THIS_MODULE)
50
51#define module_wmi_driver(__wmi_driver) \
52 module_driver(__wmi_driver, wmi_driver_register, \
53 wmi_driver_unregister)
54
55#endif