forked from Archive/PX4-Autopilot
171 lines
6.4 KiB
C
171 lines
6.4 KiB
C
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/****************************************************************************
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* fs/fat/fs_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 __FS_FAT_FS_MKATFS_H
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#define __FS_FAT_FS_MKATFS_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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/* Only the "hard drive" media type is used */
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#define FAT_DEFAULT_MEDIA_TYPE 0xf8
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/* Default hard driver geometry */
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#define FAT_DEFAULT_SECPERTRK 63
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#define FAT_DEFAULT_NUMHEADS 255
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/* FSINFO is always at this sector */
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#define FAT_DEFAULT_FSINFO_SECTOR 1
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/* FAT32 foot cluster number */
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#define FAT32_DEFAULT_ROOT_CLUSTER 2
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/* Macros to simplify direct block driver access */
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#define DEV_OPEN() \
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var->fb_inode->u.i_bops->open ? \
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var->fv_inode->u.i_bops->open(var->fv_inode) : \
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0
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#define DEV_CLOSE() \
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var->fb_inode->u.i_bops->close ? \
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var->fv_inode->u.i_bops->close(var->fv_inode) : \
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0
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#define DEV_READ(buf, sect, nsect) \
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var->fv_inode->u.i_bops->read(var->fv_inode, buf, sect, nsect)
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#define DEV_WRITE(buf, sect, nsect) \
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var->fv_inode->u.i_bops->write(var->fv_inode, buf, sect, nsect)
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#define DEV_GEOMETRY(geo) \
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var->fv_inode->u.i_bops->geometry(var->fv_inode, &geo)
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#define DEV_IOCTL(cmd, arg) \
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var->fv_inode->u.i_bops->ioctl(var->fv_inode, cmd, arg)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* This structure (plus the user-provided struct fat_format_s) describes
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* the format FAT file system. All "global" variables used in the format
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* logic are contained in this structure so that is possible to format two
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* block devices concurrently.
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*/
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struct fat_var_s
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{
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struct inode *fv_inode; /* The block driver "handle" */
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uint8_t fv_jump[3]; /* 3-byte boot jump instruction */
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uint8_t fv_sectshift; /* Log2 of fv_sectorsize */
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uint8_t fv_nrootdirsects; /* Number of root directory sectors */
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uint8_t fv_fattype; /* FAT size: 0 (not determined), 12, 16, or 32 */
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uint16_t fv_bootcodesize; /* Size of array at fv_bootcode */
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uint32_t fv_createtime; /* Creation time */
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uint32_t fv_sectorsize; /* Size of one hardware sector */
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uint32_t fv_nfatsects; /* Number of sectors in each FAT */
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uint32_t fv_nclusters; /* Number of clusters */
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uint8_t *fv_sect; /* Allocated working sector buffer */
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const uint8_t *fv_bootcode; /* Points to boot code to put into MBR */
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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_configfatfs
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*
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* Description:
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* Based on the geometry of the block device and upon the caller-selected
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* values, configure the FAT filesystem for the device.
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*
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* Input:
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* fmt - Caller specified format parameters
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* var - Holds disk geomtry data. Also, the location to return FAT
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* configuration data
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*
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* Return:
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* Zero on success; negated errno on failure
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*
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****************************************************************************/
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EXTERN int mkfatfs_configfatfs(FAR struct fat_format_s *fmt,
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FAR struct fat_var_s *var);
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/****************************************************************************
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* Name: mkfatfs_writefat
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*
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* Description:
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* Write the configured fat filesystem to the block device
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*
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* Input:
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* fmt - Caller specified format parameters
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* var - Other format parameters that are not caller specifiable. (Most
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* set by mkfatfs_configfatfs()).
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*
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* Return:
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* Zero on success; negated errno on failure
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*
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****************************************************************************/
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EXTERN int mkfatfs_writefatfs(FAR struct fat_format_s *fmt,
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FAR struct fat_var_s *var);
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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 /* __FS_FAT_FS_MKATFS_H */
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