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170 lines
6.4 KiB
170 lines
6.4 KiB
/**************************************************************************** |
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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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