nftl.h

 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
20struct 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
41int NFTL_mount(struct NFTLrecord *s);
42int NFTL_formatblock(struct NFTLrecord *s, int block);
43
44int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
45		  size_t *retlen, uint8_t *buf);
46int 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__ */