include/linux/mtd/nftl.h

   1 /*
   2  * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
   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 {
  35         struct mtd_blktrans_dev mbd;
  36         __u16 MediaUnit, SpareMediaUnit;
  37         __u32 EraseSize;
  38         struct NFTLMediaHeader MediaHdr;
  39         int usecount;
  40         unsigned char heads;
  41         unsigned char sectors;
  42         unsigned short cylinders;
  43         __u16 numvunits;
  44         __u16 lastEUN;                  /* should be suppressed */
  45         __u16 numfreeEUNs;
  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;
  53         struct nand_ecclayout oobinfo;
  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__ */