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$FreeBSD: releng/11.0/share/man/man4/uhid.4 267938 2014-06-26 21:46:14Z bapt $
.Dd November 22, 2006 .Dt UHID 4 .Os .Sh NAME .Nm uhid .Nd USB generic HID support .Sh SYNOPSIS To compile this driver into the kernel, place the following line in your kernel configuration file: d -ragged -offset indent .Cd "device uhid" .Ed
p Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : d -literal -offset indent uhid_load="YES" .Ed .Sh DESCRIPTION The .Nm driver provides support for all HID (Human Interface Device) interfaces in USB devices that do not have a special driver.
p The device handles the following .Xr ioctl 2 calls: l -tag -width indent t Dv USB_GET_REPORT_ID Pq Vt int Get the report identifier used by this HID report. t Dv USB_GET_REPORT_DESC Pq Vt "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. d -literal struct usb_ctl_report_desc { int ucrd_size; u_char ucrd_data[1024]; /* filled data size will vary */ }; .Ed t Dv USB_SET_IMMED Pq Vt int Sets the device in a mode where each .Xr read 2 will return the current value of the input report. Normally a .Xr read 2 will only return the data that the device reports on its interrupt pipe. This call may fail if the device does not support this feature. t Dv USB_GET_REPORT Pq Vt "struct usb_ctl_report" Get a report from the device without waiting for data on the interrupt pipe. The .Va report field indicates which report is requested. It should be .Dv UHID_INPUT_REPORT , .Dv UHID_OUTPUT_REPORT , or .Dv UHID_FEATURE_REPORT . This call may fail if the device does not support this feature. d -literal struct usb_ctl_report { int ucr_report; u_char ucr_data[1024]; /* used data size will vary */ }; .Ed t Dv USB_SET_REPORT Pq Vt "struct usb_ctl_report" Set a report in the device. The .Va report field indicates which report is to be set. It should be .Dv UHID_INPUT_REPORT , .Dv UHID_OUTPUT_REPORT , or .Dv UHID_FEATURE_REPORT . This call may fail if the device does not support this feature. .El
p Use .Xr read 2 to get data from the device. Data should be read in chunks of the size prescribed by the report descriptor.
p Use .Xr write 2 to send data to the device. Data should be written in chunks of the size prescribed by the report descriptor. .Sh FILES l -tag -width ".Pa /dev/uhid?" t Pa /dev/uhid? .El .Sh SEE ALSO .Xr usbhidctl 1 , .Xr usb 4 .Sh HISTORY The .Nm driver appeared in .Nx 1.4 . This manual page was adopted from .Nx by .An Tom Rhodes Aq Mt trhodes@FreeBSD.org in April 2002.