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.TH "USB_EP_ENABLE" "9" "17 July 2003" "" ""

.SH NAME
usb_ep_enable \- configure endpoint, making it usable
.SH SYNOPSIS
.sp
\fB
.sp
int usb_ep_enable  (struct usb_ep * \fIep\fB, const struct usb_endpoint_descriptor * \fIdesc\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIep\fB\fR
the endpoint being configured.  may not be the endpoint named ``ep0''.
drivers discover endpoints through the ep_list of a usb_gadget.
.TP
\fB\fIdesc\fB\fR
descriptor for desired behavior.  caller guarantees this pointer
remains valid until the endpoint is disabled; the data byte order
is little-endian (usb-standard).
.SH "DESCRIPTION"
.PP
when configurations are set, or when interface settings change, the driver
will enable or disable the relevant endpoints.  while it is enabled, an
endpoint may be used for i/o until the driver receives a \fBdisconnect\fR from
the host or until the endpoint is disabled.
.PP
the ep0 implementation (which calls this routine) must ensure that the
hardware capabilities of each endpoint match the descriptor provided
for it.  for example, an endpoint named ``ep2in-bulk'' would be usable
for interrupt transfers as well as bulk, but it likely couldn't be used
for iso transfers or for endpoint 14.  some endpoints are fully
configurable, with more generic names like ``ep-a''.  (remember that for
USB, ``in'' means ``towards the USB master''.)
.PP
returns zero, or a negative error code.
.SH "ABOUT THIS DOCUMENT"
.PP
Permission is granted to copy, distribute, and/or modify
this document under the terms of the GNU Free Documentation
License, version 1.2, or any later version published by the
Free Software Foundation; with the Invariant Sections being
the "GNU Free Documentation License",
no Front-Cover Texts,
and
no Back-Cover Texts.
.PP
This documentation is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Free Documentation License for more details.
.PP
Note that certain sections of this document are merged
into Linux kernel source code.
That content is the bulk of 
[XRef to CORE]> and
[XRef to UTILS]>,
where the "GNU Free Documentation License" is identified
as an alternate licence for its documentation.
.PP
If you have comments on the formatting of this manpage, then please contact
Michael Still (mikal@stillhq.com).
.PP
This documentation was generated with kernel version 2.5.71.