struct usb_ep
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## Name

struct 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.

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