NAME
uhid
—
USB generic HID support
SYNOPSIS
uhid* at uhidev?
DESCRIPTION
The uhid
driver provides support for all
HID (Human Interface Device) interfaces in USB devices that do not have a
special driver.
The device handles the following ioctl(2) calls:
USB_GET_REPORT_ID
int- Get the report identifier used by this HID report.
USB_GET_REPORT_DESC
struct usb_ctl_report_desc- Get the HID report descriptor. Using this descriptor the exact layout and
meaning of data to/from the device can be found. The report descriptor is
delivered without any processing.
struct usb_ctl_report_desc { int ucrd_size; u_char ucrd_data[1024]; /* filled data size will vary */ };
USB_GET_REPORT
struct usb_ctl_report- Get a report from the device without waiting for data on the interrupt
pipe. The report field indicates which report is
requested. It should be
UHID_INPUT_REPORT
,UHID_OUTPUT_REPORT
, orUHID_FEATURE_REPORT
. This call may fail if the device does not support this feature.struct usb_ctl_report { int ucr_report; u_char ucr_data[1024]; /* used data size will vary */ };
USB_SET_REPORT
struct usb_ctl_report- Set a report in the device. The
report
field indicates which report is to be set. It should beUHID_INPUT_REPORT
,UHID_OUTPUT_REPORT
, orUHID_FEATURE_REPORT
. This call may fail if the device does not support this feature.
Use read(2) to get data from the device. Data should be read in chunks of the size prescribed by the report descriptor.
Use write(2) to send data to the device. Data should be written in chunks of the size prescribed by the report descriptor.
SEE ALSO
HISTORY
The uhid
driver appeared in
OpenBSD 2.6.