fat32.h
196 lines
| 7.1 KiB
| text/x-c
|
CLexer
r47 | /*------------------------------------------------------------------------------ | |||
-- This file is a part of the libuc, microcontroler library | ||||
-- Copyright (C) 2012, Alexis Jeandet | ||||
-- | ||||
-- This program is free software; you can redistribute it and/or modify | ||||
-- it under the terms of the GNU General Public License as published by | ||||
-- the Free Software Foundation; either version 3 of the License, or | ||||
-- (at your option) any later version. | ||||
-- | ||||
-- This program is distributed in the hope that it will be useful, | ||||
-- but WITHOUT ANY WARRANTY; without even the implied warranty of | ||||
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||||
-- GNU General Public License for more details. | ||||
-- | ||||
-- You should have received a copy of the GNU General Public License | ||||
-- along with this program; if not, write to the Free Software | ||||
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||||
------------------------------------------------------------------------------- | ||||
-- Author : Alexis Jeandet | ||||
Jeandet Alexis
|
r64 | -- Mail : alexis.jeandet@member.fsf.org | ||
r47 | -------------------------------------------------------------------------------*/ | |||
#ifndef FAT32_H | ||||
#define FAT32_H | ||||
#include <mbr.h> | ||||
#include <libucfs.h> | ||||
#include <ucdirent.h> | ||||
#include <stdint.h> | ||||
#include <stdint-gcc.h> | ||||
/*BPB (Boot Sector) Offsets */ | ||||
r63 | #define BS_jmpBootoff 0 | |||
#define BS_OEMNameoff 3 | ||||
#define BPB_BytsPerSecoff 11 | ||||
#define BPB_SecPerClusoff 13 | ||||
#define BPB_RsvdSecCntoff 14 | ||||
#define BPB_NumFATsoff 16 | ||||
#define BPB_RootEntCntoff 17 | ||||
#define BPB_TotSec16off 19 | ||||
#define BPB_Mediaoff 21 | ||||
#define BPB_FATSz16off 22 | ||||
#define BPB_SecPerTrkoff 24 | ||||
#define BPB_NumHeadsoff 26 | ||||
#define BPB_HiddSecoff 28 | ||||
#define BPB_TotSec32off 32 | ||||
r47 | /*FAT16*/ | |||
r63 | #define BS_DrvNumFAT16off 36 | |||
r47 | #define BS_Reserved1FAT16off 37 | |||
r63 | #define BS_BootSigFAT16off 38 | |||
#define BS_VolIDFAT16off 39 | ||||
#define BS_VolLabFAT16off 43 | ||||
r47 | #define BS_FilSysTypeFAT16off 54 | |||
/*FAT32*/ | ||||
r63 | #define BPB_FATSz32off 36 | |||
#define BPB_ExtFlagsoff 40 | ||||
#define BPB_FSVeroff 42 | ||||
#define BPB_RootClusoff 44 | ||||
#define BPB_FSInfooff 48 | ||||
#define BPB_BkBootSecoff 50 | ||||
#define BPB_Reservedoff 52 | ||||
#define BS_DrvNumFAT32off 64 | ||||
#define BS_Reserved1FAT32off 65 | ||||
#define BS_BootSigFAT32off 66 | ||||
#define BS_VolIDFAT32off 67 | ||||
#define BS_VolLabFAT32off 71 | ||||
#define BS_FilSysTypeFAT32off 82 | ||||
r47 | ||||
#define DIR_Nameoff 0 | ||||
#define DIR_Attroff 0xb | ||||
#define DIR_FstClusHIoff 0x14 | ||||
#define DIR_FstClusLOoff 0x1A | ||||
#define DIR_FileSizeoff 0x1c | ||||
#define DIR_CrtTimeTenthoff 13 | ||||
#define DIR_CrtTimeoff 14 | ||||
#define DIR_CrtDateoff 16 | ||||
#define DIR_LstAccDateoff 18 | ||||
#define DIR_WrtTimeoff 22 | ||||
#define DIR_WrtDateoff 24 | ||||
r63 | #define FATBadpart 1 | |||
#define FATBabArg 2 | ||||
#define FATReadErr 3 | ||||
#define FATnoErr 0 | ||||
r47 | ||||
r63 | /* | |||
TODO : | ||||
intergrate a per BLKDEV or per partition buffer. | ||||
*/ | ||||
r47 | typedef struct FAT32fs | |||
{ | ||||
uint16_t BPB_BytsPerSec; | ||||
uint16_t BPB_RsvdSecCnt; | ||||
uint32_t BPB_FATSz32; | ||||
uint32_t BPB_RootClus; | ||||
uint32_t fat_begin_lba; | ||||
uint32_t cluster_begin_lba; | ||||
uint8_t BPB_SecPerClus; | ||||
uint8_t BPB_NumFATs; | ||||
r63 | char valide; | |||
r47 | dikpartition* part; | |||
}FAT32fs; | ||||
#define castUI64(val) ((uint64_t)(val)) | ||||
#define castUI32(val) ((uint32_t)(val)) | ||||
#define castUI16(val) ((uint16_t)(val)) | ||||
#define castUI8(val) ((uint8_t)(val)) | ||||
#define castI64(val) ((int64_t)(val)) | ||||
#define castI32(val) ((int32_t)(val)) | ||||
#define castI16(val) ((int16_t)(val)) | ||||
#define castI8(val) ((int8_t)(val)) | ||||
r63 | /* | |||
TODO : | ||||
Should add global function for casting with endianness care. | ||||
have a look at REV, REV16, REVSH, and RBIT ARMV7m asm | ||||
*/ | ||||
#if __BYTE_ORDER__==__ORDER_BIG_ENDIAN__ | ||||
#define fat32Ui8_2_Ui32(table,lsBindex) ((uint32_t)((0xFF&(table[lsBindex]))+(0xFF00&(((uint32_t)table[lsBindex+1])<<8))+(0xFF0000&(((uint32_t)table[lsBindex+2])<<16))+(0xFF000000&(((uint32_t)table[lsBindex+3])<<24)))) | ||||
#define fat32Ui8_2_Ui16(table,lsBindex) ((uint16_t)((0xFF&(table[lsBindex]))+(0xFF00&(((uint16_t)table[lsBindex+1])<<8)))) | ||||
#define fat32extract16b(table, LSBOffset) (uint16_t)(( (uint16_t) ((uint8_t)table[(LSBOffset)]) ) + (uint16_t)( ((uint8_t)table[(LSBOffset)+1]) << 8 )) | ||||
#define fat32extract32b(table, LSBOffset) (uint32_t)(( (uint32_t) ((uint8_t)table[(LSBOffset)]) ) + (uint32_t)( ((uint8_t)table[(LSBOffset)+1]) << 8 )+ (uint32_t)( ((uint8_t)table[(LSBOffset)+2]) << 16 )+ (uint32_t)( ((uint8_t)table[(LSBOffset)+3]) << 24 )) | ||||
#else | ||||
#define fat32Ui8_2_Ui32(table,lsBindex) ((uint32_t)((0xFF&(table[lsBindex]))+(0xFF00&(((uint32_t)table[lsBindex+1])<<8))+(0xFF0000&(((uint32_t)table[lsBindex+2])<<16))+(0xFF000000&(((uint32_t)table[lsBindex+3])<<24)))) | ||||
#define fat32Ui8_2_Ui16(table,lsBindex) ((uint16_t)((0xFF&(table[lsBindex]))+(0xFF00&(((uint16_t)table[lsBindex+1])<<8)))) | ||||
#define fat32extract16b(table, LSBOffset) (uint16_t)(( (uint16_t) ((uint8_t)table[(LSBOffset)]) ) + (uint16_t)( ((uint8_t)table[(LSBOffset)+1]) << 8 )) | ||||
#define fat32extract32b(table, LSBOffset) (uint32_t)(( (uint32_t) ((uint8_t)table[(LSBOffset)]) ) + (uint32_t)( ((uint8_t)table[(LSBOffset)+1]) << 8 )+ (uint32_t)( ((uint8_t)table[(LSBOffset)+2]) << 16 )+ (uint32_t)( ((uint8_t)table[(LSBOffset)+3]) << 24 )) | ||||
#endif | ||||
r47 | ||||
/* Get the first sector lba of given cluster number*/ | ||||
#define clusterlba(fs,cluster_number) ((uint32_t)fs->cluster_begin_lba + (((uint32_t)cluster_number) - (2)) * (uint32_t)fs->BPB_SecPerClus) | ||||
//#define fat32clusterinfatsect(fs,cluster_number) ((((uint32_t)(cluster_number))>>6) + fs->fat_begin_lba) | ||||
#define fat32clusterinfatsect(fs,cluster_number) ((((uint32_t)(cluster_number))>>7) + fs->fat_begin_lba) | ||||
r62 | #define fat32clusterinfatoff(cluster_number) (((cluster_number)&0x7F)*4) | |||
r47 | ||||
/*Get cluster index in FAT Table from sector address*/ | ||||
r63 | #define fat32masksectorlba(sectorlba,fs) (sectorlba)//(sectorlba & (castUI32(-1)^castUI32(fs->BPB_SecPerClus-1))) | |||
r47 | #define fat32sectorlbatoclusternum(fs,sectorlba) (((fat32masksectorlba(castUI32(sectorlba),fs) -(castUI32(fs->cluster_begin_lba)))/castUI32(fs->BPB_SecPerClus))+castUI32(2)) | |||
#ifdef FAT32_PRIVATE | ||||
#define fat32sectorreadout(fs,fatsec) \ | ||||
if((lastSecAddrs!=(fatsec)) || (lastFATFS!=(fs))) /*Check if sector already buffered*/ \ | ||||
{\ | ||||
if((fs)->part->phy->read((fs)->part->phy,fat32buff,(fatsec),1)!=RES_OK) \ | ||||
{\ | ||||
return DIRENT_ReadErr;\ | ||||
}\ | ||||
}\ | ||||
lastSecAddrs=(fatsec);\ | ||||
lastFATFS=(fs); | ||||
#endif | ||||
extern int fat32open(FAT32fs* fs,dikpartition* part); | ||||
extern int fat32mkdirent(FAT32fs* fs,ucdirent* dirent); | ||||
extern int fat32getVolName(FAT32fs* fs,char* Name); | ||||
extern int fat32getrootfirstent(ucdirent* entry); | ||||
extern int fat32nextdirent(ucdirent* entry); | ||||
extern int fat32nextsectorlba(FAT32fs* fs,uint32_t lastsector_lba,uint32_t* nextsector_lba); | ||||
extern int fat32prevsectorlba(FAT32fs* fs,uint32_t lastsector_lba,uint32_t *nextsector_lba); | ||||
r63 | extern int fat32prevsectorlba2(FAT32fs* fs,ucdirent* entry,uint32_t lastsector_lba,uint32_t *nextsector_lba); | |||
r47 | extern uint32_t fat32getdirentlba(ucdirent* entry); | |||
extern int fat32getdirentname(ucdirent* entry,char* nameBuffer); | ||||
#endif | ||||