struct usb_host_endpoint
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Name

struct usb_host_endpoint — host-side endpoint descriptor and queue

Synopsis

struct usb_host_endpoint {
  struct usb_endpoint_descriptor desc;
  struct list_head urb_list;
  void * hcpriv;
  struct kobject * kobj;
  unsigned char * extra;
  int extralen;
};

Members

desc

descriptor for this endpoint, wMaxPacketSize in native byteorder

urb_list

urbs queued to this endpoint; maintained by usbcore

hcpriv

for use by HCD; typically holds hardware dma queue head (QH) with one or more transfer descriptors (TDs) per urb

kobj

kobject for sysfs info

extra

descriptors following this endpoint in the configuration

extralen

how many bytes of “extra” are valid

Description

USB requests are always queued to a given endpoint, identified by a descriptor within an active interface in a given USB configuration.

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