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/* Defines for NAND Flash Translation Layer */
/* (c) 1999 Machine Vision Holdings, Inc. */
/* Author: David Woodhouse <dwmw2@mvhi.com> */
/* $Id: nftl.h,v 1.10 2000/12/29 00:25:38 dwmw2 Exp $ */
#ifndef __MTD_NFTL_H__
#define __MTD_NFTL_H__
#ifndef __BOOT__
#include <linux/mtd/mtd.h>
#endif
/* Block Control Information */
struct nftl_bci {
unsigned char ECCSig[6];
__u8 Status;
__u8 Status1;
}__attribute__((packed));
/* Unit Control Information */
struct nftl_uci0 {
__u16 VirtUnitNum;
__u16 ReplUnitNum;
__u16 SpareVirtUnitNum;
__u16 SpareReplUnitNum;
} __attribute__((packed));
struct nftl_uci1 {
__u32 WearInfo;
__u16 EraseMark;
__u16 EraseMark1;
} __attribute__((packed));
struct nftl_uci2 {
__u16 FoldMark;
__u16 FoldMark1;
__u32 unused;
} __attribute__((packed));
union nftl_uci {
struct nftl_uci0 a;
struct nftl_uci1 b;
struct nftl_uci2 c;
};
struct nftl_oob {
struct nftl_bci b;
union nftl_uci u;
};
/* NFTL Media Header */
struct NFTLMediaHeader {
char DataOrgID[6];
__u16 NumEraseUnits;
__u16 FirstPhysicalEUN;
__u32 FormattedSize;
unsigned char UnitSizeFactor;
} __attribute__((packed));
#define MAX_ERASE_ZONES (8192 - 512)
#define ERASE_MARK 0x3c69
#define SECTOR_FREE 0xff
#define SECTOR_USED 0x55
#define SECTOR_IGNORE 0x11
#define SECTOR_DELETED 0x00
#define FOLD_MARK_IN_PROGRESS 0x5555
#define ZONE_GOOD 0xff
#define ZONE_BAD_ORIGINAL 0
#define ZONE_BAD_MARKED 7
#ifdef __KERNEL__
/* these info are used in ReplUnitTable */
#define BLOCK_NIL 0xffff /* last block of a chain */
#define BLOCK_FREE 0xfffe /* free block */
#define BLOCK_NOTEXPLORED 0xfffd /* non explored block, only used during mounting */
#define BLOCK_RESERVED 0xfffc /* bios block or bad block */
struct NFTLrecord {
struct mtd_info *mtd;
struct semaphore mutex;
__u16 MediaUnit, SpareMediaUnit;
__u32 EraseSize;
struct NFTLMediaHeader MediaHdr;
int usecount;
unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
__u16 numvunits;
__u16 lastEUN; /* should be suppressed */
__u16 numfreeEUNs;
__u16 LastFreeEUN; /* To speed up finding a free EUN */
__u32 long nr_sects;
int head,sect,cyl;
__u16 *EUNtable; /* [numvunits]: First EUN for each virtual unit */
__u16 *ReplUnitTable; /* [numEUNs]: ReplUnitNumber for each */
unsigned int nb_blocks; /* number of physical blocks */
unsigned int nb_boot_blocks; /* number of blocks used by the bios */
struct erase_info instr;
};
int NFTL_mount(struct NFTLrecord *s);
int NFTL_formatblock(struct NFTLrecord *s, int block);
#ifndef NFTL_MAJOR
#define NFTL_MAJOR 93
#endif
#define MAX_NFTLS 16
#define MAX_SECTORS_PER_UNIT 32
#define NFTL_PARTN_BITS 4
#endif /* __KERNEL__ */
#endif /* __MTD_NFTL_H__ */
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