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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>struct usb_ep</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="USB Gadget API for Linux" /><link rel="up" href="ch03s03.html" title="Core Objects and Methods" /><link rel="prev" href="re16.html" title="struct usb_request" /><link rel="next" href="re18.html" title="usb_ep_enable" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>struct usb_ep</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re16.html">Prev</a> </td><th width="60%" align="center">Core Objects and Methods</th><td width="20%" align="right"> <a accesskey="n" href="re18.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="struct usb_ep"><a id="API-struct-usb-ep"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>struct usb_ep —
device side representation of USB endpoint
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
struct usb_ep {
void * driver_data;
const char * name;
const struct usb_ep_ops * ops;
struct list_head ep_list;
unsigned maxpacket:16;
}; </pre></div><div class="refsect1" title="Members"><a id="id2992460"></a><h2>Members</h2><div class="variablelist"><dl><dt><span class="term">driver_data</span></dt><dd><p>
for use by the gadget driver. all other fields are
read-only to gadget drivers.
</p></dd><dt><span class="term">name</span></dt><dd><p>
identifier for the endpoint, such as <span class="quote">“<span class="quote">ep-a</span>”</span> or <span class="quote">“<span class="quote">ep9in-bulk</span>”</span>
</p></dd><dt><span class="term">ops</span></dt><dd><p>
Function pointers used to access hardware-specific operations.
</p></dd><dt><span class="term">ep_list</span></dt><dd><p>
the gadget's ep_list holds all of its endpoints
</p></dd><dt><span class="term">maxpacket</span></dt><dd><p>
The maximum packet size used on this endpoint. The initial
value can sometimes be reduced (hardware allowing), according to
the endpoint descriptor used to configure the endpoint.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2992538"></a><h2>Description</h2><p>
the bus controller driver lists all the general purpose endpoints in
gadget->ep_list. the control endpoint (gadget->ep0) is not in that list,
and is accessed only in response to a driver <code class="function">setup</code> callback.
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