On Wed, 2 Dec 2015, Rogan Dawes wrote: > Hi folks, > > I'm wondering if it is possible/reasonable to try to turn a linux > device with host and OTG ports into something that looks and acts > like a USB hub? Besides all the other responses you received, here's a short answer to your first question: No, it's not possible. There are several reasons for this. The most compelling is that the hardware isn't capable of doing what you want. In particular, the hardware found in USB OTG device controllers will respond only to packets sent to the controller's own address, whereas a hub needs to handle packets sent to any of the downstream devices' addresses. Other reasons include things like the timing restrictions on inter-packet delays. In principle it would be possible to do this using special USB hardware (i.e., integrate a hub into a Linux computer), but it isn't possible with standard host and OTG ports. 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
