Framework Functions

• int usb_register(struct usb_driver *drv);

  This function is used to register a new USB device driver at the subsystem. The argument drv points to a completely initialized usb_driver (see figure 4) structure. On success 0 is returned otherwise an error value is returned.

• void usb_deregister(struct usb_driver *drv);

  This function deregisters a formerly registerd USB device driver at the subsystem.

• void usb_driver_claim_interface(struct usb_driver *driver, struct usb_interface *iface, void *drv_context);

  This function is intended to be used by USB device drivers that need to claim more than one interface on a device at once when probing. The argument driver points to a completely initialized usb_driver structure. The iface argument points to a usb_interface structure which is part of the usb_config_descriptor which is accesible from the usb_device structure (given in the probe function). The drv_context pointer normally references the device driver's context structure (see return value of the probe function).

• int usb_interface_claimed(struct usb_interface *iface);

  This function is used to check if another device driver already has claimed the specified interface. The return value is 0 if the interface was not claimed by any driver.

• void usb_driver_release_interface(struct usb_driver *driver, struct usb_interface *iface);

  If a driver wants to release a previously claimed interface it has to call this function. In the disconnect function you do not have to release any interfaces that were additionally claimed in the probe function.

• const struct usb_device_id *usb_match_id( struct usb_device *dev, struct usb_interface *interface, const struct usb_device_id *id);