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Control USB power on a port by port basis on some USB hubs.
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README.md
hub-ctrl.c

README.md

hub-ctrl.c

Control USB power on a port by port basis on some USB hubs.

Originally created NIIBE Yutaka and published to Github by Joel Dare on January 31st, 2013.

This only works on USB hubs that have the hardware necessary to allow software controlled power switching. Most hubs DO NOT include the hardware.

Prerequisites

Before compiling it, you'll need to install libusb-dev (under Ubuntu). I installed that with the following command.

sudo apt-get install libusb-dev

You'll also need the GCC tool chain.

Compiling

To compile the hub-ctrl.c program run the following compile command.

gcc -o hub-ctrl hub-ctrl.c -lusb

That results in an executable binary called hub-ctrl.

Controlling Power

You can control the power on a port using the following command.

sudo ./hub-ctrl -h 3 -P 1 -p 0

That says to control hub 3 (-h 3) port 1 (-P 1) and to turn the power off (-p 0). You can also use ”-p 1” to turn the power back on.

You can also specify the USB device based on the BUS and DEV numbers. Use the following command the list the currently connected devices. It's useful to run this with the device disconnected and then again with the device connected so that you can tell which device is the one you are trying to target (the Targus in my case).

lsusb

Now that we know the BUS and DEV numbers, we can control the power using those numbers as well. Here's the command for that.

sudo ./hub-ctrl -b 001 -d 005 -P1 -p 0

This time we are controlling the device on BUS 001 (-b 001) device 005 (-d 005) port 1 (-P 1) and turning the power off (-p 0).

Hubs Known to Work

The following is a list of Hubs that are known to have the hardware necessary to allow power switching.

  • D-Link-DUB-H7-High-Speed-7-Port (Tested with old Silver versions (A3, A4 & A5). Also works with some newer Black models).
  • Elecom: U2H-G4S
  • Sanwa Supply: USB-HUB14GPH
  • Targus, Inc.: PAUH212
  • Hawking Technology: UH214

Original Copyright

Copyright (C) 2006 Free Software Initiative of Japan

Author: NIIBE Yutaka

This file can be distributed under the terms and conditions of the GNU General Public License version 2 (or later).

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