include/uapi/linux/usb/g_hid.h

   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 */