From owner-freebsd-usb@FreeBSD.ORG  Thu Jun 25 13:40:27 2009
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From: Nick Hibma <nick@van-laarhoven.org>
To: FreeBSD USB Mailing List <freebsd-usb@freebsd.org>
Date: Thu, 25 Jun 2009 15:24:02 +0200
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Subject: Device reset
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HPS,

In FBSD7 I committed  an ioctl on the ugen.c (some time ago) that allowed 
for resetting the device. Not a port on the device, but the device itself. 
This was a function that was unimplemented in libusb1 up to then. For 
example some Atmel devices need a reset after you uploaded the firmware.

I cannot seem to find this functionality in usb_ioctl.h in teh FBSD8 USB 
stack.

Another use for this feature is to be able to reset a device into a known 
state, like the 3G dongles that freeze. Power-cycling them is the short way 
out of the situation.

Cheers,

Nick