fs: Adds the glue layer for the Fat FS module

Adds the glue layer to interface the Fat FS module with Zephyr
file system API.

Origin: Original
Jira: ZEP-228 ZEP-483
Change-Id: I878fdad8ecaf46992d6163e24a9b0b633f49154f
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>

include/fs/fat_fs.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * Licensed 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 _FAT_FS_H_
+#define _FAT_FS_H_
+
+#include <sys/types.h>
+#include <ff.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ZFILE_DEFINE(FIL fp);
+ZDIR_DEFINE(DIR dp);
+
+#define MAX_FILE_NAME 12 /* Uses 8.3 SFN */
+
+static inline off_t fs_tell(struct _zfile_object *zfp)
+{
+	return f_tell(&zfp->fp);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _FAT_FS_H_ */