drivers/mtd/mtdblock.h

   1 /*
   2  * drivers/mtd/mtdblock.h
   3  *
   4  * common defines for mtdblock-core and mtdblock-2x
   5  *
   6  * $Id: mtdblock.h,v 1.1 2002/11/27 10:33:37 gleixner Exp $
   7  *
   8  */
   9
  10 #ifndef __MTD_MTDBLOCK_H__
  11 #define __MTD_MTDBLOCK_H__
  12
  13 #define MAJOR_NR MTD_BLOCK_MAJOR
  14 #define DEVICE_NAME "mtdblock"
  15
  16 struct mtdblk_dev {
  17         struct mtd_info *mtd; /* Locked */
  18         int count;
  19         struct semaphore cache_sem;
  20         unsigned char *cache_data;
  21         unsigned long cache_offset;
  22         unsigned int cache_size;
  23         enum { STATE_EMPTY, STATE_CLEAN, STATE_DIRTY } cache_state;
  24 };
  25
  26 extern int write_cached_data (struct mtdblk_dev *mtdblk);
  27 extern int do_cached_write (struct mtdblk_dev *mtdblk, unsigned long pos,
  28                             int len, const char *buf);
  29 extern int do_cached_read (struct mtdblk_dev *mtdblk, unsigned long pos,
  30                            int len, char *buf);
  31
  32 extern void __exit cleanup_mtdblock(void);
  33 extern int __init init_mtdblock(void);
  34
  35 #endif