include/linux/mtd/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
  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__ */