'\" t
.\"     Title: usb_fill_int_urb
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Host-Side Data Types and Macros
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "USB_FILL_INT_URB" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Host-Side Data Types and Macro"
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.SH "NAME"
usb_fill_int_urb \- macro to help initialize a interrupt urb
.SH "SYNOPSIS"
.HP \w'void\ usb_fill_int_urb('u
.BI "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" ");"
.SH "ARGUMENTS"
.PP
\fIurb\fR
.RS 4
pointer to the urb to initialize\&.
.RE
.PP
\fIdev\fR
.RS 4
pointer to the struct usb_device for this urb\&.
.RE
.PP
\fIpipe\fR
.RS 4
the endpoint pipe
.RE
.PP
\fItransfer_buffer\fR
.RS 4
pointer to the transfer buffer
.RE
.PP
\fIbuffer_length\fR
.RS 4
length of the transfer buffer
.RE
.PP
\fIcomplete_fn\fR
.RS 4
pointer to the usb_complete_t function
.RE
.PP
\fIcontext\fR
.RS 4
what to set the urb context to\&.
.RE
.PP
\fIinterval\fR
.RS 4
what to set the urb interval to, encoded like the endpoint descriptor\*(Aqs bInterval value\&.
.RE
.SH "DESCRIPTION"
.PP
Initializes a interrupt urb with the proper information needed to submit it to a device\&.
.PP
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)\&.
.PP
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\&.
.SH "COPYRIGHT"
.br