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.Dd October 21, 2022 26.Dt XHCI 4 27.Os 28.Sh NAME 29.Nm xhci 30.Nd USB eXtensible Host Controller driver 31.Sh SYNOPSIS 32.Cd "options USB_DEBUG" 33.Cd "device xhci" 34.Sh DESCRIPTION 35The 36.Nm 37driver provides support for the 38.Tn USB 39eXtensible Host Controller Interface, 40which allows use of 41.Tn USB 421.0, 2.0 and 3.0 devices on the same 43.Tn USB 44port. 45.Pp 46The 47.Tn XHCI 48controller supports 49.Tn USB 50connection speeds from 5.0Gbps and above when using USB 3.x 51compliant devices. 52.Sh HARDWARE 53The 54.Nm 55driver supports 56.Tn XHCI 57compatible controllers having PCI class 12 (serial bus), 58subclass 3 (USB) and programming interface 48 (XHCI). 59.Sh SYSCTL VARIABLES 60The following variables are available as both 61.Xr sysctl 8 62variables and 63.Xr loader 8 64tunables: 65.Bl -tag -width indent 66.It Va hw.usb.xhci.debug 67Set debug output level, where 0 is debugging disabled and larger 68values increase debug message verbosity. 69The default value is 0. 70.It Va hw.usb.xhci.dcepquirk 71Set to enable quirk for deconfiguration of endpoints. 72The default value is 0. 73.It Va hw.usb.xhci.ctlquirk 74Set to submit full USB control request as one job, up to 64kBytes. 75Else the USB control request will be split into multiple smaller 76requests. 77The default value is 1. 78.It Va hw.usb.xhci.streams 79Set to enable USB streams support. 80The default value is 0. 81.It Va hw.usb.xhci.route 82Set bitmap for switching EHCI ports to the XHCI controller. 83The default value is 0. 84.It Va hw.usb.xhci.polling 85Set to use a timer to poll the interrupt handler. 86The default value is 0. 87.It Va hw.usb.xhci.dma32 88Set to only use 32-bit DMA for the XHCI controller. 89The default value is 0. 90.It Va hw.usb.xhci.ctlstep 91Set to enable control endpoint status state stepping. 92The default value is 0. 93.El 94.Sh SEE ALSO 95.Xr ehci 4 , 96.Xr ohci 4 , 97.Xr uhci 4 and 98.Xr usb 4 99.Sh HISTORY 100The 101.Nm 102device driver first appeared in 103.Fx 8.2 . 104