add usb host stack(class not release completely)

class/cdc/usbh_cdc_acm.h

@@ -0,0 +1,52 @@
+/**
+ * @file usbh_cdc_acm.h
+ *
+ * Copyright (c) 2022 sakumisu
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#ifndef _USBH_CDC_ACM_H
+#define _USBH_CDC_ACM_H
+
+#include "usb_cdc.h"
+
+struct usbh_cdc_acm {
+    struct usb_setup_packet *setup;
+    struct cdc_line_coding *linecoding;
+    uint8_t ctrl_intf; /* Control interface number */
+    uint8_t data_intf; /* Data interface number */
+    bool dtr;
+    bool rts;
+    uint8_t minor;
+    usbh_epinfo_t bulkin;  /* Bulk IN endpoint */
+    usbh_epinfo_t bulkout; /* Bulk OUT endpoint */
+#ifdef HAVE_INTIN_ENDPOINT
+    usbh_epinfo_t intin; /* Interrupt IN endpoint (optional) */
+#endif
+};
+
+extern const struct usbh_class_driver cdc_acm_class_driver;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif