On Thu, 24 Sep 2009, Ken McD wrote: > Greg KH wrote: > > On Thu, Sep 24, 2009 at 12:57:10AM -0400, Ken McD wrote: > > > >> I am wondering if its possible to make a linux PC control another PC > >> through a usb keyboard and mouse. > >> So kind of kvm without the video part. > >> > >> Seems most likely this is possible with the usb gadget api and a usb device > >> controller, but I cannot find any prior work on the keyboard and mouse > >> driver portion. There are some references to gadget api hid drivers, but I > >> can't find anything definite in the mailing archive or google'd. > >> > >> Can someone point me in the right direction for a solution? > >> > > > > Read the USB spec first for why this isn't possible without a hardware > > "blob" between the devices. > > > > Good luck :) > > > > greg k-h > > > Greg, I think there might be a misunderstanding. I am NOT trying to > connect 2 USB host controllers together. Yes, as you mention, this is > not possible because of the USB specification and because 2 host USB > controllers cannot communicate together, unless one is On-the-Go. I > think what you are referring to is the host-to-host usb dongles that > allow point-to-point tcp/ip networks. That's not what I'm looking for. > > What I am asking about is making a software keyboard and mouse inside > Linux that communicates through the Gadget API to a USB peripheral > device controller and then on to the destination PC. It is possible just > as a stand-alone usb keyboard or mouse works to control a PC. For > reference, the Gadget API is described here: > http://www.linux-usb.org/gadget/ > > Is brief, a linux PC can be a USB peripheral device and a usb keyboard > or mouse is a type of USB peripheral device. > So I understand the PC peripheral controllers exist and there is Linux > Gadget API to simulate USB peripheral device. What I'm looking for are > resources for the USB gadget device driver to simulate the keyboard and > mouse. I am thinking the programming for this is relatively easy because > hardware-only implementations of USB keyboards and mice are very cheap. I don't recall ever seeing any code posted to do this. Possibly because it would be pretty drastic overkill; a real USB keyboard and mouse are a lot cheaper than a Linux computer with a USB device controller. Still, it should be possible to implement such a gadget without too much difficulty. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
