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 August 29, 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 clear driver 40.Op Fl f 41.Ar device 42.Nm 43.Cm detach 44.Op Fl f 45.Ar device 46.Nm 47.Cm disable 48.Op Fl f 49.Ar device 50.Nm 51.Cm enable 52.Ar device 53.Nm 54.Cm suspend 55.Ar device 56.Nm 57.Cm resume 58.Ar device 59.Nm 60.Cm set driver 61.Op Fl f 62.Ar device driver 63.Nm 64.Cm rescan 65.Ar device 66.Nm 67.Cm delete 68.Op Fl f 69.Ar device 70.Sh DESCRIPTION 71The 72.Nm 73utility adjusts the state of individual devices in the kernel's 74internal device hierarchy. 75Each invocation of 76.Nm 77consists of a single command followed by command-specific arguments. 78Each command operates on a single device specified via the 79.Ar device 80argument. 81The 82.Ar device 83may be specified either as the name of an existing device or as a 84bus-specific address. 85More details on supported address formats can be found in 86.Xr devctl 3 . 87.Pp 88The following commands are supported: 89.Bl -tag -width indent 90.It Cm attach Ar device 91Force the kernel to re-probe the device. 92If a suitable driver is found, 93it is attached to the device. 94.It Xo Cm detach 95.Op Fl f 96.Ar device 97.Xc 98Detach the device from its current device driver. 99If the 100.Fl f 101flag is specified, 102the device driver will be detached even if the device is busy. 103.It Xo Cm disable 104.Op Fl f 105.Ar device 106.Xc 107Disable a device. 108If the device is currently attached to a device driver, 109the device driver will be detached from the device, 110but the device will retain its current name. 111If the 112.Fl f 113flag is specified, 114the device driver will be detached even if the device is busy. 115.It Cm enable Ar device 116Enable a device. 117The device will probe and attach if a suitable device driver is found. 118Note that this can re-enable a device disabled at boot time via a 119loader tunable. 120.It Cm suspend Ar device 121Suspend a device. 122This may include placing the device in a reduced power state. 123.It Cm resume Ar device 124Resume a suspended device to a fully working state. 125.It Xo Cm set driver 126.Op Fl f 127.Ar device driver 128.Xc 129Force the device to use a device driver named 130.Ar driver . 131If the device is already attached to a device driver and the 132.Fl f 133flag is specified, 134the device will be detached from its current device driver before it is 135attached to the new device driver. 136If the device is already attached to a device driver and the 137.Fl f 138flag is not specified, 139the device will not be changed. 140.It Xo Cm clear driver 141.Op Fl f 142.Ar device 143.Xc 144Clear a previously-forced driver name so that the device is able to use any 145valid device driver. 146After the previous name has been cleared, 147the device is reprobed so that other device drivers may attach to it. 148This can be used to undo an earlier 149.Cm set driver 150command. 151If the device is currently attached to a device driver and the 152.Fl f 153flag is not specified, 154the device will not be changed. 155.It Cm rescan Ar device 156Rescan a bus device checking for devices that have been added or 157removed. 158.It Xo Cm delete 159.Op Fl f 160.Ar device 161.Xc 162Delete the device from the device tree. 163If the 164.Fl f 165flag is specified, 166the device will be deleted even if it is physically present. 167This command should be used with care as a device that is deleted but present 168can no longer be used unless the parent bus device rediscovers the device via 169a rescan request. 170.El 171.Sh SEE ALSO 172.Xr devctl 3 , 173.Xr devinfo 8 174.Sh HISTORY 175The 176.Nm 177utility first appeared in 178.Fx 10.3 . 179