STRUCT USB_HOST_ENDP - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Host-Side Data Types and Macro

NAMEstruct_usb_host_endpoint − host−side endpoint descriptor and queue

SYNOPSISstruct usb_host_endpoint { struct usb_endpoint_descriptor desc; struct list_head urb_list; void * hcpriv; struct ep_device * ep_dev; struct usb_host_ss_ep_comp * ss_ep_comp; unsigned char * extra; int extralen; int enabled; };

MEMBERSdesc 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 ep_dev ep_device for sysfs info ss_ep_comp companion descriptor information for this endpoint extra descriptors following this endpoint in the configuration extralen how many bytes of extra are valid enabled URBs may be submitted to this endpoint

DESCRIPTIONUSB 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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