usb_request Struct Reference

A USB request. More...

#include <request.h>

Collaboration diagram for usb_request:

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Data Fields
struct slist	buf_list
struct slist_node	node
unsigned long	flags
void(*	req_done )(struct udc *udc, struct usb_request *req)
void *	context
int	status
size_t	bytes_xfered

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Detailed Description

A USB request.

This structure keeps track of the data associated with a USB request for use in asynchronous transfers.

Definition at line 75 of file request.h.

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Field Documentation

struct slist usb_request::buf_list [read]

List of buffers associated with this request

Definition at line 77 of file request.h.

Referenced by msc_submit_write_data_req(), udc_ep0_submit_in_req(), udc_ep0_submit_out_req(), udc_ep_submit_in_req(), udc_ep_submit_out_req(), usb_req_add_buffer(), usb_req_get_first_buffer(), usb_req_init(), usbb_udc_dma_interrupt(), usbb_udc_submit_in_queue(), and usbb_udc_submit_out_queue().

size_t usb_request::bytes_xfered

The number of bytes actually transfered. May be less than len if an error occurred, or if the UDC received a short packet.

Definition at line 106 of file request.h.

Referenced by usb_req_init(), and usbb_udc_dma_interrupt().

void* usb_request::context

Arbitrary data pointer associated with this request, for use by the submitter.

Definition at line 95 of file request.h.

Referenced by msc_submit_write_data_req().

unsigned long usb_request::flags

A bitwise combination of the bits defined by enum usb_request_flag.

Definition at line 84 of file request.h.

Referenced by usb_func_get_descriptor(), usb_req_init(), and usbb_udc_submit_in_queue().

struct slist_node usb_request::node [read]

List node on the controller queue

Definition at line 79 of file request.h.

Referenced by udc_ep0_submit_in_req(), udc_ep0_submit_out_req(), udc_ep_submit_in_req(), udc_ep_submit_out_req(), usbb_udc_dma_interrupt(), usbb_udc_submit_in_queue(), and usbb_udc_submit_out_queue().

void(* usb_request::req_done)(struct udc *udc, struct usb_request *req)

Function to be called when this request is completed.

Parameters:

	udc	The USB Device Controller that did the request
	req	The request that was completed.

Referenced by msc_submit_write_data_req(), usb_func_get_descriptor(), usbb_udc_submit_in_queue(), and usbb_udc_submit_out_queue().

int usb_request::status

Status code set by the UDC driver upon completion of this request.

Definition at line 100 of file request.h.

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The documentation for this struct was generated from the following file:

• include/usb/request.h