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.Nm 63.Cm delete 64.Op Fl f 65.Ar device 66.Sh DESCRIPTION 67The 68.Nm 69utility adjusts the state of individual devices in the kernel's 70internal device hierarchy. 71Each invocation of 72.Nm 73consists of a single command followed by command-specific arguments. 74Each command operates on a single device specified via the 75.Ar device 76argument. 77The 78.Ar device 79may be specified either as the name of an existing device or as a 80bus-specific address. 81More details on supported address formats can be found in 82.Xr devctl 3 . 83.Pp 84The following commands are supported: 85.Bl -tag -width indent 86.It Cm attach Ar device 87Force the kernel to re-probe the device. 88If a suitable driver is found, 89it is attached to the device. 90.It Xo Cm detach 91.Op Fl f 92.Ar device 93.Xc 94Detach the device from its current device driver. 95If the 96.Fl f 97flag is specified, 98the device driver will be detached even if the device is busy. 99.It Xo Cm disable 100.Op Fl f 101.Ar device 102.Xc 103Disable a device. 104If the device is currently attached to a device driver, 105the device driver will be detached from the device, 106but the device will retain its current name. 107If the 108.Fl f 109flag is specified, 110the device driver will be detached even if the device is busy. 111.It Cm enable Ar device 112Enable a device. 113The device will probe and attach if a suitable device driver is found. 114Note that this can re-enable a device disabled at boot time via a 115loader tunable. 116.It Cm suspend Ar device 117Suspend a device. 118This may include placing the device in a reduced power state. 119.It Cm resume Ar device 120Resume a suspended device to a fully working state. 121.It Xo Cm set driver 122.Op Fl f 123.Ar device driver 124.Xc 125Force the device to use a device driver named 126.Ar driver . 127If the device is already attached to a device driver and the 128.Fl f 129flag is specified, 130the device will be detached from its current device driver before it is 131attached to the new device driver. 132If the device is already attached to a device driver and the 133.Fl f 134flag is not specified, 135the device will not be changed. 136.It Cm rescan Ar device 137Rescan a bus device checking for devices that have been added or 138removed. 139.It Xo Cm delete 140.Op Fl 141.Ar device 142.Xc 143Delete the device from the device tree. 144If the 145.Fl f 146flag is specified, 147the device will be deleted even if it is physically present. 148This command should be used with care as a device that is deleted but present 149can no longer be used unless the parent bus device rediscovers the device via 150a rescan request. 151.El 152.Sh SEE ALSO 153.Xr devctl 3 , 154.Xr devinfo 8 155.Sh HISTORY 156The 157.Nm 158utility first appeared in 159.Fx 10.3 . 160