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/****************************************************************************
* fs/fat/fs_mkfat.h
*
* Copyright (C) 2008-2009 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 __FS_FAT_FS_MKATFS_H
#define __FS_FAT_FS_MKATFS_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
/* Macros to simplify direct block driver access */
#define DEV_OPEN() \
var->fb_inode->u.i_bops->open ? \
var->fv_inode->u.i_bops->open(var->fv_inode) : \
0
#define DEV_CLOSE() \
var->fb_inode->u.i_bops->close ? \
var->fv_inode->u.i_bops->close(var->fv_inode) : \
0
#define DEV_READ(buf, sect, nsect) \
var->fv_inode->u.i_bops->read(var->fv_inode, buf, sect, nsect)
#define DEV_WRITE(buf, sect, nsect) \
var->fv_inode->u.i_bops->write(var->fv_inode, buf, sect, nsect)
#define DEV_GEOMETRY(geo) \
var->fv_inode->u.i_bops->geometry(var->fv_inode, &geo)
#define DEV_IOCTL(cmd, arg) \
var->fv_inode->u.i_bops->ioctl(var->fv_inode, cmd, arg)
/****************************************************************************
* 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
{
struct inode *fv_inode; /* The block driver "handle" */
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 */
};
/****************************************************************************
* Global Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* 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
*
****************************************************************************/
EXTERN 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
*
****************************************************************************/
EXTERN int mkfatfs_writefatfs(FAR struct fat_format_s *fmt,
FAR struct fat_var_s *var);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __FS_FAT_FS_MKATFS_H */
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