104 lines
3.9 KiB
C
104 lines
3.9 KiB
C
/* $NetBSD: fdvar.h,v 1.3 2005/12/11 12:22:02 christos Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "rnd.h"
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#if NRND > 0
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#include <sys/rnd.h>
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#endif
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/*
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* Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
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* we tell them apart.
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*/
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struct fd_type {
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int sectrac; /* sectors per track */
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int heads; /* number of heads */
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int seccyl; /* sectors per cylinder */
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int secsize; /* size code for sectors */
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int datalen; /* data len when secsize = 0 */
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int steprate; /* step rate and head unload time */
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int gap1; /* gap len between sectors */
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int gap2; /* formatting gap */
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int cyls; /* total num of cylinders */
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int size; /* size of disk in sectors */
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int step; /* steps per cylinder */
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int rate; /* transfer speed code */
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u_char fillbyte; /* format fill byte */
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u_char interleave; /* interleave factor (formatting) */
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const char *name;
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};
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/* software state, per disk (with up to 4 disks per ctlr) */
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struct fd_softc {
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struct device sc_dev;
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struct disk sc_dk;
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const struct fd_type *sc_deftype; /* default type descriptor */
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struct fd_type *sc_type; /* current type descriptor */
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struct fd_type sc_type_copy; /* copy for fiddling when formatting */
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struct callout sc_motoron_ch;
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struct callout sc_motoroff_ch;
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daddr_t sc_blkno; /* starting block number */
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int sc_bcount; /* byte count left */
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int sc_opts; /* user-set options */
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int sc_skip; /* bytes already transferred */
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int sc_nblks; /* number of blocks currently transferring */
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int sc_nbytes; /* number of bytes currently transferring */
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int sc_drive; /* physical unit number */
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int sc_flags;
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#define FD_OPEN 0x01 /* it's open */
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#define FD_MOTOR 0x02 /* motor should be on */
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#define FD_MOTOR_WAIT 0x04 /* motor coming up */
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int sc_cylin; /* where we think the head is */
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void *sc_sdhook; /* saved shutdown hook for drive. */
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TAILQ_ENTRY(fd_softc) sc_drivechain;
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int sc_ops; /* I/O ops since last switch */
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struct bufq_state *sc_q;/* pending I/O requests */
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int sc_active; /* number of active I/O operations */
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#if NRND > 0
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rndsource_element_t rnd_source;
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#endif
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};
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