1.\" 2.\" Copyright (c) 2011-2022 Hans Petter Selasky. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd October 21, 2022 28.Dt XHCI 4 29.Os 30.Sh NAME 31.Nm xhci 32.Nd USB eXtensible Host Controller driver 33.Sh SYNOPSIS 34.Cd "options USB_DEBUG" 35.Cd "device xhci" 36.Sh DESCRIPTION 37The 38.Nm 39driver provides support for the 40.Tn USB 41eXtensible Host Controller Interface, 42which allows use of 43.Tn USB 441.0, 2.0 and 3.0 devices on the same 45.Tn USB 46port. 47.Pp 48The 49.Tn XHCI 50controller supports 51.Tn USB 52connection speeds from 5.0Gbps and above when using USB 3.x 53compliant devices. 54.Sh HARDWARE 55The 56.Nm 57driver supports 58.Tn XHCI 59compatible controllers having PCI class 12 (serial bus), 60subclass 3 (USB) and programming interface 48 (XHCI). 61.Sh SYSCTL VARIABLES 62The following variables are available as both 63.Xr sysctl 8 64variables and 65.Xr loader 8 66tunables: 67.Bl -tag -width indent 68.It Va hw.usb.xhci.debug 69Set debug output level, where 0 is debugging disabled and larger 70values increase debug message verbosity. 71The default value is 0. 72.It Va hw.usb.xhci.dcepquirk 73Set to enable quirk for deconfiguration of endpoints. 74The default value is 0. 75.It Va hw.usb.xhci.ctlquirk 76Set to submit full USB control request as one job, up to 64kBytes. 77Else the USB control request will be split into multiple smaller 78requests. 79The default value is 1. 80.It Va hw.usb.xhci.streams 81Set to enable USB streams support. 82The default value is 0. 83.It Va hw.usb.xhci.route 84Set bitmap for switching EHCI ports to the XHCI controller. 85The default value is 0. 86.It Va hw.usb.xhci.polling 87Set to use a timer to poll the interrupt handler. 88The default value is 0. 89.It Va hw.usb.xhci.dma32 90Set to only use 32-bit DMA for the XHCI controller. 91The default value is 0. 92.It Va hw.usb.xhci.ctlstep 93Set to enable control endpoint status state stepping. 94The default value is 0. 95.El 96.Sh SEE ALSO 97.Xr ehci 4 , 98.Xr ohci 4 , 99.Xr uhci 4 and 100.Xr usb 4 101.Sh HISTORY 102The 103.Nm 104device driver first appeared in 105.Fx 8.2 . 106