Identifying the device # {: .center-image} [source] When a USB device is inserted to system, the very first initialization function to be started is drivers/usb/core/usb.c:usb_init(), written in [here]. The USB root hub driver (i.e. hcd) initiates the USB device initialization, the USB core takes the control and initializes an actual device structure struct usb_device. linux/include/linux/usb.h struct usb_device { int devnum; char devpath[16]; ... struct usb_device *parent; struct usb_bus *bu...
