1/*
2 * wmi.h - ACPI WMI interface
3 *
4 * Copyright (c) 2015 Andrew Lutomirski
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 */
15
16#ifndef _LINUX_WMI_H
17#define _LINUX_WMI_H
18
19#include <linux/device.h>
20#include <linux/acpi.h>
21#include <linux/mod_devicetable.h>
22#include <uapi/linux/wmi.h>
23
24struct wmi_device {
25 struct device dev;
26
27 /* True for data blocks implementing the Set Control Method */
28 bool setable;
29};
30
31/* evaluate the ACPI method associated with this device */
32extern acpi_status wmidev_evaluate_method(struct wmi_device *wdev,
33 u8 instance, u32 method_id,
34 const struct acpi_buffer *in,
35 struct acpi_buffer *out);
36
37/* Caller must kfree the result. */
38extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
39 u8 instance);
40
41extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
42
43struct wmi_driver {
44 struct device_driver driver;
45 const struct wmi_device_id *id_table;
46
47 int (*probe)(struct wmi_device *wdev);
48 int (*remove)(struct wmi_device *wdev);
49 void (*notify)(struct wmi_device *device, union acpi_object *data);
50 long (*filter_callback)(struct wmi_device *wdev, unsigned int cmd,
51 struct wmi_ioctl_buffer *arg);
52};
53
54extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
55 struct module *owner);
56extern void wmi_driver_unregister(struct wmi_driver *driver);
57#define wmi_driver_register(driver) __wmi_driver_register((driver), THIS_MODULE)
58
59#define module_wmi_driver(__wmi_driver) \
60 module_driver(__wmi_driver, wmi_driver_register, \
61 wmi_driver_unregister)
62
63#endif
64