165 lines
4.6 KiB
Groff
165 lines
4.6 KiB
Groff
.\" $NetBSD: uhid.4,v 1.20 2008/04/30 13:10:54 martin 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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.\"
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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 November 22, 2005
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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 ? flags N"
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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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Normally the
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.Nm
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driver is used when no other HID driver attaches to a device.
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If
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.Dq flags 1
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is specified, the
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.Nm
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driver will instead attach with a very high priority and always be used.
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Together with the
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.Cd vendor
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and
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.Cd product
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locators on the
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.Xr uhidev 4
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driver this can be used to force the
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.Nm
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driver to be used for a certain device.
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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
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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.
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Using this descriptor the exact layout and meaning of data to/from
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the device can be found.
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The report descriptor is delivered without any processing.
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.Bd -literal
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struct usb_ctl_report_desc {
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int ucrd_size;
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u_char ucrd_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.
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Normally 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.
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This call may fail if the device does not support 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.
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The
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.Dv report
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field indicates which report is requested.
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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 ucr_report;
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u_char ucr_data[1024]; /* used data size will vary */
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};
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.Ed
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.It Dv USB_SET_REPORT (struct usb_ctl_report)
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Set a report in the device.
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The
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.Dv report
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field indicates which report is to be set.
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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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.It Dv USB_GET_DEVICEINFO (struct usb_device_info)
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Get an information summary for the device.
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This call will not issue any USB transactions.
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.It Dv USB_GET_STRING_DESC (struct usb_string_desc)
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Get a string descriptor for the given language id and
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string index.
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.Bd -literal
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struct usb_string_desc {
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int usd_string_index;
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int usd_language_id;
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usb_string_descriptor_t usd_desc;
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};
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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.
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Data should be read in chunks of the size prescribed by the report
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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.
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Data should be written in chunks of the size prescribed by the
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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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Support for the
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.Dv USB_GET_DEVICEINFO
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and
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.Dv USB_GET_STRING_DESC
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ioctls appeared in
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.Nx 2.0 .
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