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88 lines
2.3 KiB
88 lines
2.3 KiB
20 years ago
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#ifndef _ZFTAPE_H
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#define _ZFTAPE_H
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/*
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* Copyright (C) 1996, 1997 Claus-Justus Heine.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Source: /homes/cvs/ftape-stacked/include/linux/zftape.h,v $
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* $Revision: 1.12 $
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* $Date: 1997/10/21 11:02:37 $
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*
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* Special ioctl and other global info for the zftape VFS
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* interface for the QIC-40/80/3010/3020 floppy-tape driver for
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* Linux.
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*/
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#define ZFTAPE_VERSION "zftape for " FTAPE_VERSION
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#include <linux/ftape.h>
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#define ZFTAPE_LABEL "Ftape - The Linux Floppy Tape Project!"
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/* Bits of the minor device number that control the operation mode */
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#define ZFT_Q80_MODE (1 << 3)
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#define ZFT_ZIP_MODE (1 << 4)
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#define ZFT_RAW_MODE (1 << 5)
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#define ZFT_MINOR_OP_MASK (ZFT_Q80_MODE | \
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ZFT_ZIP_MODE | \
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ZFT_RAW_MODE)
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#define ZFT_MINOR_MASK (FTAPE_SEL_MASK | \
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ZFT_MINOR_OP_MASK | \
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FTAPE_NO_REWIND)
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#ifdef ZFT_OBSOLETE
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struct mtblksz {
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unsigned int mt_blksz;
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};
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#define MTIOC_ZFTAPE_GETBLKSZ _IOR('m', 104, struct mtblksz)
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#endif
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#ifdef __KERNEL__
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extern int zft_init(void);
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static inline __s64 zft_div_blksz(__s64 value, __u32 blk_sz)
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{
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if (blk_sz == 1) {
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return value;
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} else {
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return (__s64)(((__u32)(value >> 10) + (blk_sz >> 10) - 1)
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/ (blk_sz >> 10));
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}
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}
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static inline __s64 zft_mul_blksz(__s64 value, __u32 blk_sz)
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{
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if (blk_sz == 1) {
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return value;
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} else {
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/* if blk_sz != 1, then it is a multiple of 1024. In
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* this case, `value' will also fit into 32 bits.
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*
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* Actually, this limits the capacity to 42
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* bits. This is (2^32)*1024, roughly a thousand
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* times 2GB, or 3 Terabytes. Hopefully this is enough
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*/
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return(__s64)(((__u32)(value)*(blk_sz>>10))<<10);
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}
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}
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#endif
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#endif
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