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#ifndef _ZFTAPE_H
#define _ZFTAPE_H

/*
 * Copyright (C) 1996, 1997 Claus-Justus Heine.

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; see the file COPYING.  If not, write to
 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

 *
 * $Source: /home/fabio/w/shark/sharkcvs/CVSROOT/shark/drivers/linuxc26/include/linux/zftape.h,v $
 * $Revision: 1.1 $
 * $Date: 2004-01-28 15:27:05 $
 *
 *      Special ioctl and other global info for the zftape VFS
 *      interface for the QIC-40/80/3010/3020 floppy-tape driver for
 *      Linux.
 */

#define ZFTAPE_VERSION  "zftape for " FTAPE_VERSION

#include <linux/ftape.h>

#define ZFTAPE_LABEL       "Ftape - The Linux Floppy Tape Project!"

/* Bits of the minor device number that control the operation mode */
#define ZFT_Q80_MODE            (1 << 3)
#define ZFT_ZIP_MODE            (1 << 4)
#define ZFT_RAW_MODE            (1 << 5)
#define ZFT_MINOR_OP_MASK       (ZFT_Q80_MODE   |       \
                                 ZFT_ZIP_MODE   |       \
                                 ZFT_RAW_MODE)
#define ZFT_MINOR_MASK          (FTAPE_SEL_MASK         |       \
                                 ZFT_MINOR_OP_MASK      |       \
                                 FTAPE_NO_REWIND)

#ifdef ZFT_OBSOLETE
struct mtblksz {
        unsigned int mt_blksz;
};
#define MTIOC_ZFTAPE_GETBLKSZ _IOR('m', 104, struct mtblksz)
#endif

#ifdef __KERNEL__

extern int zft_init(void);

static inline __s64 zft_div_blksz(__s64 value, __u32 blk_sz)
{
        if (blk_sz == 1) {
                return value;
        } else {
                return (__s64)(((__u32)(value >> 10) + (blk_sz >> 10) - 1)
                               / (blk_sz >> 10));
        }
}

static inline __s64 zft_mul_blksz(__s64 value, __u32 blk_sz)
{
        if (blk_sz == 1) {
                return value;
        } else {
                /*  if blk_sz != 1, then it is a multiple of 1024. In
                 *  this case, `value' will also fit into 32 bits.
                 *
                 *  Actually, this limits the capacity to 42
                 *  bits. This is (2^32)*1024, roughly a thousand
                 *  times 2GB, or 3 Terabytes. Hopefully this is enough
                 */
                return(__s64)(((__u32)(value)*(blk_sz>>10))<<10);
        }
}

#endif

#endif