Hi, > But I'm not sure, since I've never attempted to memory map PCI registers > from userspace. I was under the impression that you just can't do that. You can mmap /sys/bus/pci/devices(${device}/resource0. Just hacked up a tool which dumps the capability registers this way: http://www.kraxel.org/cgit/usb-tools/tree/usb-print-caps.c cheers, Gerd -- 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