1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 3 #ifndef __UAPI_LINUX_USB_G_HID_H 4 #define __UAPI_LINUX_USB_G_HID_H 5 6 #include <linux/types.h> 7 8 /* Maximum HID report length for High-Speed USB (i.e. USB 2.0) */ 9 #define MAX_REPORT_LENGTH 64 10 11 /** 12 * struct usb_hidg_report - response to GET_REPORT 13 * @report_id: report ID that this is a response for 14 * @userspace_req: 15 * !0 this report is used for any pending GET_REPORT request 16 * but wait on userspace to issue a new report on future requests 17 * 0 this report is to be used for any future GET_REPORT requests 18 * @length: length of the report response 19 * @data: report response 20 * @padding: padding for 32/64 bit compatibility 21 * 22 * Structure used by GADGET_HID_WRITE_GET_REPORT ioctl on /dev/hidg*. 23 */ 24 struct usb_hidg_report { 25 __u8 report_id; 26 __u8 userspace_req; 27 __u16 length; 28 __u8 data[MAX_REPORT_LENGTH]; 29 __u8 padding[4]; 30 }; 31 32 /* The 'g' code is used by gadgetfs and hid gadget ioctl requests. 33 * Don't add any colliding codes to either driver, and keep 34 * them in unique ranges. 35 */ 36 37 #define GADGET_HID_READ_GET_REPORT_ID _IOR('g', 0x41, __u8) 38 #define GADGET_HID_WRITE_GET_REPORT _IOW('g', 0x42, struct usb_hidg_report) 39 40 #endif /* __UAPI_LINUX_USB_G_HID_H */ 41