1.\" 2.\" Copyright (c) 2015 John Baldwin <jhb@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd April 27, 2016 29.Dt DEVCTL 8 30.Os 31.Sh NAME 32.Nm devctl 33.Nd device control utility 34.Sh SYNOPSIS 35.Nm 36.Cm attach 37.Ar device 38.Nm 39.Cm detach 40.Op Fl f 41.Ar device 42.Nm 43.Cm disable 44.Op Fl f 45.Ar device 46.Nm 47.Cm enable 48.Ar device 49.Nm 50.Cm suspend 51.Ar device 52.Nm 53.Cm resume 54.Ar device 55.Nm 56.Cm set driver 57.Op Fl f 58.Ar device driver 59.Nm 60.Cm rescan 61.Ar device 62.Sh DESCRIPTION 63The 64.Nm 65utility adjusts the state of individual devices in the kernel's 66internal device hierarchy. 67Each invocation of 68.Nm 69consists of a single command followed by command-specific arguments. 70Each command operates on a single device specified via the 71.Ar device 72argument. 73The 74.Ar device 75may be specified either as the name of an existing device or as a 76bus-specific address. 77More details on supported address formats can be found in 78.Xr devctl 3 . 79.Pp 80The following commands are supported: 81.Bl -tag -width indent 82.It Cm attach Ar device 83Force the kernel to re-probe the device. 84If a suitable driver is found, 85it is attached to the device. 86.It Xo Cm detach 87.Op Fl f 88.Ar device 89.Xc 90Detach the device from its current device driver. 91If the 92.Fl f 93flag is specified, 94the device driver will be detached even if the device is busy. 95.It Xo Cm disable 96.Op Fl f 97.Ar device 98.Xc 99Disable a device. 100If the device is currently attached to a device driver, 101the device driver will be detached from the device, 102but the device will retain its current name. 103If the 104.Fl f 105flag is specified, 106the device driver will be detached even if the device is busy. 107.It Cm enable Ar device 108Enable a device. 109The device will probe and attach if a suitable device driver is found. 110Note that this can re-enable a device disabled at boot time via a 111loader tunable. 112.It Cm suspend Ar device 113Suspend a device. 114This may include placing the device in a reduced power state. 115.It Cm resume Ar device 116Resume a suspended device to a fully working state. 117.It Xo Cm set driver 118.Op Fl f 119.Ar device driver 120.Xc 121Force the device to use a device driver named 122.Ar driver . 123If the device is already attached to a device driver and the 124.Fl f 125flag is specified, 126the device will be detached from its current device driver before it is 127attached to the new device driver. 128If the device is already attached to a device driver and the 129.Fl f 130flag is not specified, 131the device will not be changed. 132.It Cm rescan Ar device 133Rescan a bus device checking for devices that have been added or 134removed. 135.El 136.Sh SEE ALSO 137.Xr devctl 3 , 138.Xr devinfo 8 139.Sh HISTORY 140The 141.Nm 142utility first appeared in 143.Fx 10.3 . 144