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/*------------------------------------------------------------------------------
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-- This file is a part of the libuc, microcontroler library
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-- Copyright (C) 2012, Alexis Jeandet
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------
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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@gmail.com
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-------------------------------------------------------------------------------*/
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#ifndef FAT32_H
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#define FAT32_H
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#include <mbr.h>
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#include <libucfs.h>
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#include <ucdirent.h>
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#include <stdint.h>
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#include <stdint-gcc.h>
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/*BPB (Boot Sector) Offsets */
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#define BS_jmpBootoff 0
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#define BS_OEMNameoff 3
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#define BPB_BytsPerSecoff 11
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#define BPB_SecPerClusoff 13
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#define BPB_RsvdSecCntoff 14
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#define BPB_NumFATsoff 16
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#define BPB_RootEntCntoff 17
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#define BPB_TotSec16off 19
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#define BPB_Mediaoff 21
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#define BPB_FATSz16off 22
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#define BPB_SecPerTrkoff 24
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#define BPB_NumHeadsoff 26
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#define BPB_HiddSecoff 28
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#define BPB_TotSec32off 32
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/*FAT16*/
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#define BS_DrvNumFAT16off 36
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#define BS_Reserved1FAT16off 37
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#define BS_BootSigFAT16off 38
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#define BS_VolIDFAT16off 39
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#define BS_VolLabFAT16off 43
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#define BS_FilSysTypeFAT16off 54
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/*FAT32*/
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#define BPB_FATSz32off 36
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#define BPB_ExtFlagsoff 40
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#define BPB_FSVeroff 42
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#define BPB_RootClusoff 44
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#define BPB_FSInfooff 48
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#define BPB_BkBootSecoff 50
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#define BPB_Reservedoff 52
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#define BS_DrvNumFAT32off 64
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#define BS_Reserved1FAT32off 65
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#define BS_BootSigFAT32off 66
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#define BS_VolIDFAT32off 67
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#define BS_VolLabFAT32off 71
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#define BS_FilSysTypeFAT32off 82
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#define DIR_Nameoff 0
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#define DIR_Attroff 0xb
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#define DIR_FstClusHIoff 0x14
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#define DIR_FstClusLOoff 0x1A
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#define DIR_FileSizeoff 0x1c
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#define DIR_CrtTimeTenthoff 13
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#define DIR_CrtTimeoff 14
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#define DIR_CrtDateoff 16
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#define DIR_LstAccDateoff 18
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#define DIR_WrtTimeoff 22
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#define DIR_WrtDateoff 24
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#define FATBadpart 1
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#define FATBabArg 2
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#define FATReadErr 3
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#define FATnoErr 0
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typedef struct FAT32fs
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{
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uint16_t BPB_BytsPerSec;
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uint16_t BPB_RsvdSecCnt;
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uint32_t BPB_FATSz32;
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uint32_t BPB_RootClus;
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uint32_t fat_begin_lba;
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uint32_t cluster_begin_lba;
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uint8_t BPB_SecPerClus;
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uint8_t BPB_NumFATs;
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dikpartition* part;
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}FAT32fs;
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#define castUI64(val) ((uint64_t)(val))
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#define castUI32(val) ((uint32_t)(val))
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#define castUI16(val) ((uint16_t)(val))
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#define castUI8(val) ((uint8_t)(val))
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#define castI64(val) ((int64_t)(val))
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#define castI32(val) ((int32_t)(val))
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#define castI16(val) ((int16_t)(val))
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#define castI8(val) ((int8_t)(val))
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#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))))
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#define fat32Ui8_2_Ui16(table,lsBindex) ((uint16_t)((0xFF&(table[lsBindex]))+(0xFF00&(((uint16_t)table[lsBindex+1])<<8))))
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/* Get the first sector lba of given cluster number*/
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#define clusterlba(fs,cluster_number) ((uint32_t)fs->cluster_begin_lba + (((uint32_t)cluster_number) - (2)) * (uint32_t)fs->BPB_SecPerClus)
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//#define fat32clusterinfatsect(fs,cluster_number) ((((uint32_t)(cluster_number))>>6) + fs->fat_begin_lba)
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#define fat32clusterinfatsect(fs,cluster_number) ((((uint32_t)(cluster_number))>>7) + fs->fat_begin_lba)
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#define fat32clusterinfatoff(cluster_number) (((cluster_number)&0x3F)*4)
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/*Get cluster index in FAT Table from sector address*/
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#define fat32masksectorlba(sectorlba,fs) (sectorlba & (castUI32(-1)^castUI32(fs->BPB_SecPerClus-1)))
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#define fat32sectorlbatoclusternum(fs,sectorlba) (((fat32masksectorlba(castUI32(sectorlba),fs) -(castUI32(fs->cluster_begin_lba)))/castUI32(fs->BPB_SecPerClus))+castUI32(2))
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#define fat32extract16b(table, LSBOffset) (uint16_t)(( (uint16_t) ((uint8_t)table[(LSBOffset)]) ) + (uint16_t)( ((uint8_t)table[(LSBOffset)+1]) << 8 ))
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#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 ))
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#ifdef FAT32_PRIVATE
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#define fat32sectorreadout(fs,fatsec) \
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if((lastSecAddrs!=(fatsec)) || (lastFATFS!=(fs))) /*Check if sector already buffered*/ \
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{\
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if((fs)->part->phy->read((fs)->part->phy,fat32buff,(fatsec),1)!=RES_OK) \
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{\
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return DIRENT_ReadErr;\
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}\
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}\
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lastSecAddrs=(fatsec);\
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lastFATFS=(fs);
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#endif
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extern int fat32open(FAT32fs* fs,dikpartition* part);
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extern int fat32mkdirent(FAT32fs* fs,ucdirent* dirent);
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extern int fat32getVolName(FAT32fs* fs,char* Name);
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extern int fat32getrootfirstent(ucdirent* entry);
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extern int fat32nextdirent(ucdirent* entry);
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extern int fat32nextsectorlba(FAT32fs* fs,uint32_t lastsector_lba,uint32_t* nextsector_lba);
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extern int fat32prevsectorlba(FAT32fs* fs,uint32_t lastsector_lba,uint32_t *nextsector_lba);
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extern uint32_t fat32getdirentlba(ucdirent* entry);
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extern int fat32getdirentname(ucdirent* entry,char* nameBuffer);
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#endif
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