1 files changed, 55 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/cdc.h b/qemu/roms/ipxe/src/include/ipxe/cdc.h
new file mode 100644
index 000000000..f1799cd9a
--- /dev/null
+++ b/qemu/roms/ipxe/src/include/ipxe/cdc.h
@@ -0,0 +1,55 @@
+#ifndef _IPXE_CDC_H
+#define _IPXE_CDC_H
+
+/** @file
+ *
+ * USB Communications Device Class (CDC)
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <ipxe/usb.h>
+
+/** Class code for communications devices */
+#define USB_CLASS_CDC 2
+
+/** Union functional descriptor */
+struct cdc_union_descriptor {
+	/** Descriptor header */
+	struct usb_descriptor_header header;
+	/** Descriptor subtype */
+	uint8_t subtype;
+	/** Interfaces (variable-length) */
+	uint8_t interface[1];
+} __attribute__ (( packed ));
+
+/** Union functional descriptor subtype */
+#define CDC_SUBTYPE_UNION 6
+
+/** Ethernet descriptor subtype */
+#define CDC_SUBTYPE_ETHERNET 15
+
+/** Network connection notification */
+#define CDC_NETWORK_CONNECTION						\
+	( USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE |		\
+	  USB_REQUEST_TYPE ( 0x00 ) )
+
+/** Connection speed change notification */
+#define CDC_CONNECTION_SPEED_CHANGE					\
+	( USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE |		\
+	  USB_REQUEST_TYPE ( 0x2a ) )
+
+/** Connection speed change notification */
+struct cdc_connection_speed_change {
+	/** Downlink bit rate, in bits per second */
+	uint32_t down;
+	/** Uplink bit rate, in bits per second */
+	uint32_t up;
+} __attribute__ (( packed ));
+
+extern struct cdc_union_descriptor *
+cdc_union_descriptor ( struct usb_configuration_descriptor *config,
+		       struct usb_interface_descriptor *interface );
+
+#endif /* _IPXE_CDC_H */