cdc.c File Reference

USB Communications Device Class (CDC) More...

#include <stddef.h>
#include <ipxe/usb.h>
#include <ipxe/cdc.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
struct cdc_union_descriptor *	cdc_union_descriptor (struct usb_configuration_descriptor *config, struct usb_interface_descriptor *interface)
	Locate CDC union functional descriptor. More...

Detailed Description

USB Communications Device Class (CDC)

Definition in file cdc.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

cdc_union_descriptor()

struct cdc_union_descriptor* cdc_union_descriptor	(	struct usb_configuration_descriptor *	config,
		struct usb_interface_descriptor *	interface
	)

Locate CDC union functional descriptor.

Parameters

config	Configuration descriptor
interface	Interface descriptor

Return values

desc	Union functional descriptor, or NULL if not found

Definition at line 44 of file cdc.c.

                                                                    {
        struct cdc_union_descriptor *desc;

        for_each_interface_descriptor ( desc, config, interface ) {
                if ( ( desc->header.type == USB_CS_INTERFACE_DESCRIPTOR ) &&
                     ( desc->subtype == CDC_SUBTYPE_UNION ) )
                        return desc;
        }
        return NULL;
}

References CDC_SUBTYPE_UNION, desc, for_each_interface_descriptor, NULL, and USB_CS_INTERFACE_DESCRIPTOR.