1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  * USB CDC Device Management userspace API definitions
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * version 2 as published by the Free Software Foundation.
8  */
9 
10 #ifndef _UAPI__LINUX_USB_CDC_WDM_H
11 #define _UAPI__LINUX_USB_CDC_WDM_H
12 
13 #include <linux/types.h>
14 
15 /*
16  * This IOCTL is used to retrieve the wMaxCommand for the device,
17  * defining the message limit for both reading and writing.
18  *
19  * For CDC WDM functions this will be the wMaxCommand field of the
20  * Device Management Functional Descriptor.
21  */
22 #define IOCTL_WDM_MAX_COMMAND _IOR('H', 0xA0, __u16)
23 
24 #endif /* _UAPI__LINUX_USB_CDC_WDM_H */
25