centos man page for usb_fill_int_urb

USB_FILL_INT_URB(9)					  Host-Side Data Types and Macro				       USB_FILL_INT_URB(9)

NAME
       usb_fill_int_urb - macro to help initialize a interrupt urb

SYNOPSIS
       void usb_fill_int_urb(struct urb * urb, struct usb_device * dev, unsigned int pipe, void * transfer_buffer, int buffer_length,
			     usb_complete_t complete_fn, void * context, int interval);

ARGUMENTS
       urb
	   pointer to the urb to initialize.

       dev
	   pointer to the struct usb_device for this urb.

       pipe
	   the endpoint pipe

       transfer_buffer
	   pointer to the transfer buffer

       buffer_length
	   length of the transfer buffer

       complete_fn
	   pointer to the usb_complete_t function

       context
	   what to set the urb context to.

       interval
	   what to set the urb interval to, encoded like the endpoint descriptor's bInterval value.

DESCRIPTION
       Initializes a interrupt urb with the proper information needed to submit it to a device.

       Note that High Speed and SuperSpeed interrupt endpoints use a logarithmic encoding of the endpoint interval, and express polling intervals
       in microframes (eight per millisecond) rather than in frames (one per millisecond).

       Wireless USB also uses the logarithmic encoding, but specifies it in units of 128us instead of 125us. For Wireless USB devices, the
       interval is passed through to the host controller, rather than being translated into microframe units.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       USB_FILL_INT_URB(9)