STRUCT USB_EP(9) Kernel Mode Gadget API STRUCT USB_EP(9)NAMEstruct_usb_ep - device side representation of USB endpoint
SYNOPSIS
struct usb_ep {
void * driver_data;
const char * name;
const struct usb_ep_ops * ops;
struct list_head ep_list;
unsigned maxpacket:16;
unsigned max_streams:16;
unsigned mult:2;
unsigned maxburst:5;
u8 address;
const struct usb_endpoint_descriptor * desc;
const struct usb_ss_ep_comp_descriptor * comp_desc;
};
MEMBERS
driver_data
for use by the gadget driver.
name
identifier for the endpoint, such as “ep-a” or “ep9in-bulk”
ops
Function pointers used to access hardware-specific operations.
ep_list
the gadget's ep_list holds all of its endpoints
maxpacket
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.
max_streams
The maximum number of streams supported by this EP (0 - 16, actual
number is 2^n)
mult
multiplier, 'mult' value for SS Isoc EPs
maxburst
the maximum number of bursts supported by this EP (for usb3)
address
used to identify the endpoint when finding descriptor that matches
connection speed
desc
endpoint descriptor. This pointer is set before the endpoint is
enabled and remains valid until the endpoint is disabled.
comp_desc
In case of SuperSpeed support, this is the endpoint companion
descriptor that is used to configure the endpoint
DESCRIPTION
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 setup callback.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 STRUCT USB_EP(9)
