1.\" 2.\" Copyright (c) 2015 John Baldwin <jhb@FreeBSD.org> 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 August 29, 2016 28.Dt DEVCTL 8 29.Os 30.Sh NAME 31.Nm devctl 32.Nd device control utility 33.Sh SYNOPSIS 34.Nm 35.Cm attach 36.Ar device 37.Nm 38.Cm clear driver 39.Op Fl f 40.Ar device 41.Nm 42.Cm detach 43.Op Fl f 44.Ar device 45.Nm 46.Cm disable 47.Op Fl f 48.Ar device 49.Nm 50.Cm enable 51.Ar device 52.Nm 53.Cm suspend 54.Ar device 55.Nm 56.Cm resume 57.Ar device 58.Nm 59.Cm set driver 60.Op Fl f 61.Ar device driver 62.Nm 63.Cm rescan 64.Ar device 65.Nm 66.Cm delete 67.Op Fl f 68.Ar device 69.Sh DESCRIPTION 70The 71.Nm 72utility adjusts the state of individual devices in the kernel's 73internal device hierarchy. 74Each invocation of 75.Nm 76consists of a single command followed by command-specific arguments. 77Each command operates on a single device specified via the 78.Ar device 79argument. 80The 81.Ar device 82may be specified either as the name of an existing device or as a 83bus-specific address. 84More details on supported address formats can be found in 85.Xr devctl 3 . 86.Pp 87The following commands are supported: 88.Bl -tag -width indent 89.It Cm attach Ar device 90Force the kernel to re-probe the device. 91If a suitable driver is found, 92it is attached to the device. 93.It Xo Cm detach 94.Op Fl f 95.Ar device 96.Xc 97Detach the device from its current device driver. 98If the 99.Fl f 100flag is specified, 101the device driver will be detached even if the device is busy. 102.It Xo Cm disable 103.Op Fl f 104.Ar device 105.Xc 106Disable a device. 107If the device is currently attached to a device driver, 108the device driver will be detached from the device, 109but the device will retain its current name. 110If the 111.Fl f 112flag is specified, 113the device driver will be detached even if the device is busy. 114.It Cm enable Ar device 115Enable a device. 116The device will probe and attach if a suitable device driver is found. 117Note that this can re-enable a device disabled at boot time via a 118loader tunable. 119.It Cm suspend Ar device 120Suspend a device. 121This may include placing the device in a reduced power state. 122.It Cm resume Ar device 123Resume a suspended device to a fully working state. 124.It Xo Cm set driver 125.Op Fl f 126.Ar device driver 127.Xc 128Force the device to use a device driver named 129.Ar driver . 130If the device is already attached to a device driver and the 131.Fl f 132flag is specified, 133the device will be detached from its current device driver before it is 134attached to the new device driver. 135If the device is already attached to a device driver and the 136.Fl f 137flag is not specified, 138the device will not be changed. 139.It Xo Cm clear driver 140.Op Fl f 141.Ar device 142.Xc 143Clear a previously-forced driver name so that the device is able to use any 144valid device driver. 145After the previous name has been cleared, 146the device is reprobed so that other device drivers may attach to it. 147This can be used to undo an earlier 148.Cm set driver 149command. 150If the device is currently attached to a device driver and the 151.Fl f 152flag is not specified, 153the device will not be changed. 154.It Cm rescan Ar device 155Rescan a bus device checking for devices that have been added or 156removed. 157.It Xo Cm delete 158.Op Fl f 159.Ar device 160.Xc 161Delete the device from the device tree. 162If the 163.Fl f 164flag is specified, 165the device will be deleted even if it is physically present. 166This command should be used with care as a device that is deleted but present 167can no longer be used unless the parent bus device rediscovers the device via 168a rescan request. 169.El 170.Sh SEE ALSO 171.Xr devctl 3 , 172.Xr devinfo 8 173.Sh HISTORY 174The 175.Nm 176utility first appeared in 177.Fx 10.3 . 178