diff --git a/fsutils/mkfatfs/mkfatfs.h b/fsutils/mkfatfs/mkfatfs.h
new file mode 100644
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+++ b/fsutils/mkfatfs/mkfatfs.h
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+/****************************************************************************
+ * apps/futils/mkfatfs/mkfatfs.h
+ *
+ *   Copyright (C) 2008-2009, 2017 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_FSUTILS_MKFATFS_MKFATFS_H
+#define __APPS_FSUTILS_MKFATFS_MKFATFS_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Only the "hard drive" media type is used */
+
+#define FAT_DEFAULT_MEDIA_TYPE         0xf8
+
+/*  Default hard driver geometry */
+
+#define FAT_DEFAULT_SECPERTRK          63
+#define FAT_DEFAULT_NUMHEADS           255
+
+/* FSINFO is always at this sector */
+
+#define FAT_DEFAULT_FSINFO_SECTOR      1
+
+/* FAT32 foot cluster number */
+
+#define FAT32_DEFAULT_ROOT_CLUSTER     2
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* This structure (plus the user-provided struct fat_format_s) describes
+ * the format FAT file system.  All "global" variables used in the format
+ * logic are contained in this structure so that is possible to format two
+ * block devices concurrently.
+ */
+
+struct fat_var_s
+{
+  int            fv_fd;             /* File descriptor of open block driver */
+  uint8_t        fv_jump[3];        /* 3-byte boot jump instruction */
+  uint8_t        fv_sectshift;      /* Log2 of fv_sectorsize */
+  uint8_t        fv_nrootdirsects;  /* Number of root directory sectors */
+  uint8_t        fv_fattype;        /* FAT size: 0 (not determined), 12, 16, or 32 */
+  uint16_t       fv_bootcodesize;   /* Size of array at fv_bootcode */
+  uint32_t       fv_createtime;     /* Creation time */
+  uint32_t       fv_sectorsize;     /* Size of one hardware sector */
+  uint32_t       fv_nfatsects;      /* Number of sectors in each FAT */
+  uint32_t       fv_nclusters;      /* Number of clusters */
+  uint8_t       *fv_sect;           /* Allocated working sector buffer */
+  const uint8_t *fv_bootcode;       /* Points to boot code to put into MBR */
+};
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+struct fat_format_s; /* Forward reference */
+
+/****************************************************************************
+ * Name: mkfatfs_configfatfs
+ *
+ * Description:
+ *   Based on the geometry of the block device and upon the caller-selected
+ *   values, configure the FAT filesystem for the device.
+ *
+ * Input:
+ *    fmt  - Caller specified format parameters
+ *    var  - Holds disk geomtry data.  Also, the location to return FAT
+ *           configuration data
+ *
+ * Return:
+ *    Zero on success; negated errno on failure
+ *
+ ****************************************************************************/
+
+int mkfatfs_configfatfs(FAR struct fat_format_s *fmt,
+                        FAR struct fat_var_s *var);
+
+/****************************************************************************
+ * Name: mkfatfs_writefat
+ *
+ * Description:
+ *   Write the configured fat filesystem to the block device
+ *
+ * Input:
+ *    fmt  - Caller specified format parameters
+ *    var  - Other format parameters that are not caller specifiable. (Most
+ *           set by mkfatfs_configfatfs()).
+ *
+ * Return:
+ *    Zero on success; negated errno on failure
+ *
+ ****************************************************************************/
+
+int mkfatfs_writefatfs(FAR struct fat_format_s *fmt,
+                       FAR struct fat_var_s *var);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __APPS_FSUTILS_MKFATFS_MKFATFS_H */