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 16 struct 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 */ 24 extern 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. */ 30 extern union acpi_object *wmidev_block_query(struct wmi_device *wdev, 31 u8 instance); 32 33 extern int set_required_buffer_size(struct wmi_device *wdev, u64 length); 34 35 struct 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 void (*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 46 extern int __must_check __wmi_driver_register(struct wmi_driver *driver, 47 struct module *owner); 48 extern 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 56