add cdc ecm device

class/cdc/usbd_cdc_ecm.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2022, sakumisu
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef USBD_CDC_ECM_H
+#define USBD_CDC_ECM_H
+
+#include "usb_cdc.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Ethernet Maximum Segment size, typically 1514 bytes */
+#define CONFIG_CDC_ECM_ETH_MAX_SEGSZE 1514U
+#define CONFIG_USBDEV_CDC_ECM_USING_LWIP
+
+/* Init cdc ecm interface driver */
+struct usbd_interface *usbd_cdc_ecm_init_intf(struct usbd_interface *intf, const uint8_t int_ep, const uint8_t out_ep, const uint8_t in_ep);
+
+/* Setup request command callback api */
+void usbd_cdc_ecm_set_connect_speed(uint32_t speed[2]);
+void usbd_cdc_ecm_data_recv_done(void);
+
+#ifdef CONFIG_USBDEV_CDC_ECM_USING_LWIP
+#include <lwip/pbuf.h>
+struct pbuf *usbd_cdc_ecm_eth_rx(void);
+int usbd_cdc_ecm_eth_tx(struct pbuf *p);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* USBD_CDC_ECM_H */