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nftl.h
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1 /*
2  * Copyright © 1999-2010 David Woodhouse <[email protected]>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17  *
18  */
19 
20 #ifndef __MTD_NFTL_H__
21 #define __MTD_NFTL_H__
22 
23 #include <linux/mtd/mtd.h>
24 #include <linux/mtd/blktrans.h>
25 
26 #include <mtd/nftl-user.h>
27 
28 /* these info are used in ReplUnitTable */
29 #define BLOCK_NIL 0xffff /* last block of a chain */
30 #define BLOCK_FREE 0xfffe /* free block */
31 #define BLOCK_NOTEXPLORED 0xfffd /* non explored block, only used during mounting */
32 #define BLOCK_RESERVED 0xfffc /* bios block or bad block */
33 
34 struct NFTLrecord {
39  int usecount;
40  unsigned char heads;
41  unsigned char sectors;
42  unsigned short cylinders;
44  __u16 lastEUN; /* should be suppressed */
46  __u16 LastFreeEUN; /* To speed up finding a free EUN */
47  int head,sect,cyl;
48  __u16 *EUNtable; /* [numvunits]: First EUN for each virtual unit */
49  __u16 *ReplUnitTable; /* [numEUNs]: ReplUnitNumber for each */
50  unsigned int nb_blocks; /* number of physical blocks */
51  unsigned int nb_boot_blocks; /* number of blocks used by the bios */
52  struct erase_info instr;
54 };
55 
56 int NFTL_mount(struct NFTLrecord *s);
57 int NFTL_formatblock(struct NFTLrecord *s, int block);
58 
59 int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
60  size_t *retlen, uint8_t *buf);
61 int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len,
62  size_t *retlen, uint8_t *buf);
63 
64 #ifndef NFTL_MAJOR
65 #define NFTL_MAJOR 93
66 #endif
67 
68 #define MAX_NFTLS 16
69 #define MAX_SECTORS_PER_UNIT 64
70 #define NFTL_PARTN_BITS 4
71 
72 #endif /* __MTD_NFTL_H__ */