146 lines
6.0 KiB
C
146 lines
6.0 KiB
C
/****************************************************************************
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* include/nuttx/mkfat.h
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __NUTTX_MKFATFS_H
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#define __NUTTX_MKFATFS_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MKFATFS_DEFAULT_NFATS 2 /* 2: Default number of FATs */
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#define MKFATFS_DEFAULT_FATTYPE 0 /* 0: Autoselect FAT size */
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#define MKFATFS_DEFAULT_CLUSTSHIFT 0xff /* 0xff: Autoselect cluster size */
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#define MKFATFS_DEFAULT_VOLUMELABEL { ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ' }
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#define MKFATFS_DEFAULT_BKUPBOOT 0 /* 0: Determine sector number of the backup boot sector */
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#define MKFATFS_DEFAULT_ROOTDIRENTS 0 /* 0: Autoselect number of root directory entries */
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#define MKFATFS_DEFAULT_RSVDSECCOUNT 0 /* 0: Autoselect number reserved sectors (usually 32) */
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#define MKFATFS_DEFAULT_HIDSEC 0 /* No hidden sectors */
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#define MKFATFS_DEFAULT_VOLUMEID 0 /* No volume ID */
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#define MKFATFS_DEFAULT_NSECTORS 0 /* 0: Use all sectors on device */
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#define FAT_FORMAT_INITIALIZER \
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{ \
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MKFATFS_DEFAULT_NFATS, \
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MKFATFS_DEFAULT_FATTYPE, \
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MKFATFS_DEFAULT_CLUSTSHIFT, \
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MKFATFS_DEFAULT_VOLUMELABEL, \
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MKFATFS_DEFAULT_BKUPBOOT, \
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MKFATFS_DEFAULT_ROOTDIRENTS, \
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MKFATFS_DEFAULT_RSVDSECCOUNT, \
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MKFATFS_DEFAULT_HIDSEC, \
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MKFATFS_DEFAULT_VOLUMEID, \
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MKFATFS_DEFAULT_NSECTORS \
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}
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* These are input parameters for the format. On return, these values may be
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* overwritted with actual values used in the format.
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*/
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struct fat_format_s
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{
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uint8_t ff_nfats; /* Number of FATs */
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uint8_t ff_fattype; /* FAT size: 0 (autoselect), 12, 16, or 32 */
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uint8_t ff_clustshift; /* Log2 of sectors per cluster: 0-5, 0xff (autoselect) */
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uint8_t ff_volumelabel[11]; /* Volume label */
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uint16_t ff_backupboot; /* Sector number of the backup boot sector (0=use default)*/
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uint16_t ff_rootdirentries; /* Number of root directory entries */
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uint16_t ff_rsvdseccount; /* Reserved sectors */
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uint32_t ff_hidsec; /* Count of hidden sectors preceding fat */
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uint32_t ff_volumeid; /* FAT volume id */
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uint32_t ff_nsectors; /* Number of sectors from device to use: 0: Use all */
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};
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/****************************************************************************
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* Global Variables
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: mkfatfs
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*
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* Description:
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* Make a FAT file system image on the specified block device
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*
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* Inputs:
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* pathname - the full path to a registered block driver
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* fmt - Describes characteristics of the desired filesystem
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*
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* Return:
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* Zero (OK) on success; -1 (ERROR) on failure with errno set appropriately:
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*
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* EINVAL - NULL block driver string, bad number of FATS in 'fmt', bad FAT
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* size in 'fmt', bad cluster size in 'fmt'
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* ENOENT - 'pathname' does not refer to anything in the filesystem.
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* ENOTBLK - 'pathname' does not refer to a block driver
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* EACCESS - block driver does not support write or geometry methods
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*
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* Assumptions:
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* - The caller must assure that the block driver is not mounted and not in
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* use when this function is called. The result of formatting a mounted
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* device is indeterminate (but likely not good).
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*
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****************************************************************************/
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EXTERN int mkfatfs(FAR const char *pathname, FAR struct fat_format_s *fmt);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __NUTTX_MKFATFS_H */
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