hub-ctrl.c

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

Originally created by 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 -P 1 -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 tested with newer Black version C1 although there is one issue reporting that the C1 didn't work).
Elecom: U2H-G4S
Sanwa Supply: USB-HUB14GPH
Targus, Inc.: PAUH212
Hawking Technology: UH214
B+B SmartWorx (B&B Electronics): UHR204
B+B SmartWorx (B&B Electronics): USH304
Belkin: F5U701
Linksys: USB2HUB4
Raspberry Pi 2: the usb port numbering posted bellow, if the port value is 2, all the 4 usb ports will be controled

____________________________________________
|                                          |
|  ______________      _______   ______    |
|  |            |      |     |   |    |    |
|  |            |      |  p2 |   | p4 |    |
|  |            |      |     |   |    |    |
|  |  ETH0(p1)  |      +-----+   +----+    |
|  |            |                          |
|  |            |      _______   ______    |
|  |            |      |     |   |    |    |
|  |            |      |  p3 |   | p5 |    |
|  |            |      |     |   |    |    |
|  |____________|      +-----+   +----+    |
+------------------------------------------+

Original Copyright

Author: NIIBE Yutaka