usb_ep_clear_halt(9) [centos man page]

USB_EP_CLEAR_HALT(9)					      Kernel Mode Gadget API					      USB_EP_CLEAR_HALT(9)

NAME

       usb_ep_clear_halt - clears endpoint halt, and resets toggle

SYNOPSIS

       int usb_ep_clear_halt(struct usb_ep * ep);

ARGUMENTS

       ep
	   the bulk or interrupt endpoint being reset

DESCRIPTION

       Use this when responding to the standard usb "set interface" request, for endpoints that aren't reconfigured, after clearing any other
       state in the endpoint's i/o queue.

       Returns zero, or a negative error code. On success, this call clears the underlying hardware state reflecting endpoint halt and data
       toggle. Note that some hardware can't support this request (like pxa2xx_udc), and accordingly can't correctly implement interface
       altsettings.

AUTHOR

       David Brownell <dbrownell@users.sourceforge.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						      USB_EP_CLEAR_HALT(9)

STRUCT 
USB_EP(9)					      Kernel Mode Gadget API						  STRUCT USB_EP(9)

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.

AUTHOR

       David Brownell <dbrownell@users.sourceforge.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							  STRUCT USB_EP(9)