include/linux/mtd/nftl.h

   1
   2 /* Defines for NAND Flash Translation Layer  */
   3 /* (c) 1999 Machine Vision Holdings, Inc.    */
   4 /* Author: David Woodhouse <dwmw2@mvhi.com>  */
   5 /* $Id: nftl.h,v 1.10 2000/12/29 00:25:38 dwmw2 Exp $ */
   6
   7 #ifndef __MTD_NFTL_H__
   8 #define __MTD_NFTL_H__
   9
  10 /* Block Control Information */
  11
  12 struct nftl_bci {
  13         unsigned char ECCSig[6];
  14         __u8 Status;
  15         __u8 Status1;
  16 }__attribute__((packed));
  17
  18 /* Unit Control Information */
  19
  20 struct nftl_uci0 {
  21         __u16 VirtUnitNum;
  22         __u16 ReplUnitNum;
  23         __u16 SpareVirtUnitNum;
  24         __u16 SpareReplUnitNum;
  25 } __attribute__((packed));
  26
  27 struct nftl_uci1 {
  28         __u32 WearInfo;
  29         __u16 EraseMark;
  30         __u16 EraseMark1;
  31 } __attribute__((packed));
  32
  33 struct nftl_uci2 {
  34         __u16 FoldMark;
  35         __u16 FoldMark1;
  36         __u32 unused;
  37 } __attribute__((packed));
  38
  39 union nftl_uci {
  40         struct nftl_uci0 a;
  41         struct nftl_uci1 b;
  42         struct nftl_uci2 c;
  43 };
  44
  45 struct nftl_oob {
  46         struct nftl_bci b;
  47         union nftl_uci u;
  48 };
  49
  50 /* NFTL Media Header */
  51
  52 struct NFTLMediaHeader {
  53         char DataOrgID[6];
  54         __u16 NumEraseUnits;
  55         __u16 FirstPhysicalEUN;
  56         __u32 FormattedSize;
  57         unsigned char UnitSizeFactor;
  58 } __attribute__((packed));
  59
  60 #define MAX_ERASE_ZONES (8192 - 512)
  61
  62 #define ERASE_MARK 0x3c69
  63 #define SECTOR_FREE 0xff
  64 #define SECTOR_USED 0x55
  65 #define SECTOR_IGNORE 0x11
  66 #define SECTOR_DELETED 0x00
  67
  68 #define FOLD_MARK_IN_PROGRESS 0x5555
  69
  70 #define ZONE_GOOD 0xff
  71 #define ZONE_BAD_ORIGINAL 0
  72 #define ZONE_BAD_MARKED 7
  73
  74 /* these info are used in ReplUnitTable */
  75 #define BLOCK_NIL          0xffff /* last block of a chain */
  76 #define BLOCK_FREE         0xfffe /* free block */
  77 #define BLOCK_NOTEXPLORED  0xfffd /* non explored block, only used during mounting */
  78 #define BLOCK_RESERVED     0xfffc /* bios block or bad block */
  79
  80 struct NFTLrecord {
  81         struct DiskOnChip *mtd;
  82         __u16 MediaUnit, SpareMediaUnit;
  83         __u32 EraseSize;
  84         struct NFTLMediaHeader MediaHdr;
  85         int usecount;
  86         unsigned char heads;
  87         unsigned char sectors;
  88         unsigned short cylinders;
  89         __u16 numvunits;
  90         __u16 lastEUN;                  /* should be suppressed */
  91         __u16 numfreeEUNs;
  92         __u16 LastFreeEUN;              /* To speed up finding a free EUN */
  93         __u32 nr_sects;
  94         int head,sect,cyl;
  95         __u16 *EUNtable;                /* [numvunits]: First EUN for each virtual unit  */
  96         __u16 *ReplUnitTable;           /* [numEUNs]: ReplUnitNumber for each */
  97         unsigned int nb_blocks;         /* number of physical blocks */
  98         unsigned int nb_boot_blocks;    /* number of blocks used by the bios */
  99 };
 100
 101 #define MAX_NFTLS 16
 102 #define MAX_SECTORS_PER_UNIT 32
 103 #define NFTL_PARTN_BITS 4
 104
 105 #endif /* __MTD_NFTL_H__ */