1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> 4 */ 5 6 #ifndef __MTD_NFTL_H__ 7 #define __MTD_NFTL_H__ 8 9 #include <linux/mtd/mtd.h> 10 #include <linux/mtd/blktrans.h> 11 12 #include <mtd/nftl-user.h> 13 14 /* these info are used in ReplUnitTable */ 15 #define BLOCK_NIL 0xffff /* last block of a chain */ 16 #define BLOCK_FREE 0xfffe /* free block */ 17 #define BLOCK_NOTEXPLORED 0xfffd /* non explored block, only used during mounting */ 18 #define BLOCK_RESERVED 0xfffc /* bios block or bad block */ 19 20 struct NFTLrecord { 21 struct mtd_blktrans_dev mbd; 22 __u16 MediaUnit, SpareMediaUnit; 23 __u32 EraseSize; 24 struct NFTLMediaHeader MediaHdr; 25 int usecount; 26 unsigned char heads; 27 unsigned char sectors; 28 unsigned short cylinders; 29 __u16 numvunits; 30 __u16 lastEUN; /* should be suppressed */ 31 __u16 numfreeEUNs; 32 __u16 LastFreeEUN; /* To speed up finding a free EUN */ 33 int head,sect,cyl; 34 __u16 *EUNtable; /* [numvunits]: First EUN for each virtual unit */ 35 __u16 *ReplUnitTable; /* [numEUNs]: ReplUnitNumber for each */ 36 unsigned int nb_blocks; /* number of physical blocks */ 37 unsigned int nb_boot_blocks; /* number of blocks used by the bios */ 38 struct erase_info instr; 39 }; 40 41 int NFTL_mount(struct NFTLrecord *s); 42 int NFTL_formatblock(struct NFTLrecord *s, int block); 43 44 int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len, 45 size_t *retlen, uint8_t *buf); 46 int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len, 47 size_t *retlen, uint8_t *buf); 48 49 #ifndef NFTL_MAJOR 50 #define NFTL_MAJOR 93 51 #endif 52 53 #define MAX_NFTLS 16 54 #define MAX_SECTORS_PER_UNIT 64 55 #define NFTL_PARTN_BITS 4 56 57 #endif /* __MTD_NFTL_H__ */ 58