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