129 lines
4.2 KiB
Groff
129 lines
4.2 KiB
Groff
.\" $NetBSD: uhid.4,v 1.14 2002/06/12 00:24:39 wiz Exp $
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.\"
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.\" Copyright (c) 1999, 2001 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Lennart Augustsson.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd July 12, 1998
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.Dt UHID 4
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.Os
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.Sh NAME
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.Nm uhid
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.Nd USB generic HID support
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.Sh SYNOPSIS
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.Cd "uhid* at uhidev? reportid ?"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for all HID (Human Interface Device) interfaces
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in USB devices that do not have a special driver.
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.Pp
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The device handles the following
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.Xr ioctl 2
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calls:
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.Pp
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.Bl -tag -width indent -compact
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.It Dv USB_GET_REPORT_ID (int)
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Get the report identifier used by this HID report.
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.It Dv USB_GET_REPORT_DESC (struct usb_ctl_report_desc)
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Get the HID report descriptor. Using
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this descriptor the exact layout and meaning of data to/from
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the device can be found. The report descriptor is delivered
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without any processing.
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.Bd -literal
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struct usb_ctl_report_desc {
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int size;
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u_char data[1024]; /* filled data size will vary */
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};
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.Ed
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.It Dv USB_SET_IMMED (int)
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Sets the device in a mode where each
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.Xr read 2
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will return the current value of the input report. Normally
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a
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.Xr read 2
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will only return the data that the device reports on its
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interrupt pipe. This call may fail if the device does not support
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this feature.
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.It Dv USB_GET_REPORT (struct usb_ctl_report)
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Get a report from the device without waiting for data on
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the interrupt pipe. The
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.Dv report
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field indicates which report is requested. It should be
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.Dv UHID_INPUT_REPORT ,
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.Dv UHID_OUTPUT_REPORT ,
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or
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.Dv UHID_FEATURE_REPORT .
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This call may fail if the device does not support this feature.
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.Bd -literal
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struct usb_ctl_report {
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int report;
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u_char data[1024]; /* used data size will vary */
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};
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.It Dv USB_SET_REPORT (struct usb_ctl_report)
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Set a report in the device. The
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.Dv report
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field indicates which report is to be set. It should be
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.Dv UHID_INPUT_REPORT ,
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.Dv UHID_OUTPUT_REPORT ,
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or
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.Dv UHID_FEATURE_REPORT .
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This call may fail if the device does not support this feature.
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.Ed
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.El
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.Pp
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Use
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.Xr read 2
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to get data from the device. Data should be read in chunks of the
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size prescribed by the report descriptor.
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.Pp
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Use
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.Xr write 2
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send data to the device. Data should be written in chunks of the
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size prescribed by the report descriptor.
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.Sh FILES
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.Bl -tag -width Pa
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.It Pa /dev/uhid?
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.El
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.Sh SEE ALSO
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.Xr usbhidaction 1 ,
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.Xr usbhidctl 1 ,
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.Xr uhidev 4 ,
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.Xr usb 4
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.Sh HISTORY
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The
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.Nm
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driver
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appeared in
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.Nx 1.4 .
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