include/linux/wmi.h

   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
  24 struct 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 */
  32 extern 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. */
  38 extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
  39                                              u8 instance);
  40
  41 extern int set_required_buffer_size(struct wmi_device *wdev, u64 length);
  42
  43 struct 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
  54 extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
  55                                               struct module *owner);
  56 extern 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