Date: Wed, 20 Jul 2011 15:19:55 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Subject: Re: Powercycling USB device on hub Message-ID: <201107201519.55975.hselasky@c2i.net> In-Reply-To: <CA%2BervzZXRTHk6GWSy0HMELaANdwYia4ddQ1pX=tCrPx73pqMtg@mail.gmail.com> References: <CA%2BervzZXRTHk6GWSy0HMELaANdwYia4ddQ1pX=tCrPx73pqMtg@mail.gmail.com>
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On Wednesday 20 July 2011 14:30:37 Peer Stritzinger wrote: > Hi, > > is ist possible to power-cycle the HUB port of a USB device by > programmatic means (via script or libusb or some ioctl)? > > It would be perfect if I could power-off/on just a certain device but > it would also help to power-cycle all devices on a HUB. > Hi, Using the usbconfig utility in 8 stable and 9 current, you can set the configuration to 255 which means unconfigured and then 0 for the root HUB. For non-root HUBs you can BUS-reset the devices usbconfig -d X.Y reset or set_config aswell. There is also a power_off command, but your device might not come back after that. --HPS
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