LXR linux/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
  34struct 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};
  54
  55int NFTL_mount(struct NFTLrecord *s);
  56int NFTL_formatblock(struct NFTLrecord *s, int block);
  57
  58int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
  59                  size_t *retlen, uint8_t *buf);
  60int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len,
  61                   size_t *retlen, uint8_t *buf);
  62
  63#ifndef NFTL_MAJOR
  64#define NFTL_MAJOR 93
  65#endif
  66
  67#define MAX_NFTLS 16
  68#define MAX_SECTORS_PER_UNIT 64
  69#define NFTL_PARTN_BITS 4
  70
  71#endif /* __MTD_NFTL_H__ */
  72