1/* $NetBSD: fdvar.h,v 1.9 2015/04/13 16:33:24 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/rndsource.h>
33
34/*
35 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
36 * we tell them apart.
37 */
38struct fd_type {
39 int sectrac; /* sectors per track */
40 int heads; /* number of heads */
41 int seccyl; /* sectors per cylinder */
42 int secsize; /* size code for sectors */
43 int datalen; /* data len when secsize = 0 */
44 int steprate; /* step rate and head unload time */
45 int gap1; /* gap len between sectors */
46 int gap2; /* formatting gap */
47 int cyls; /* total num of cylinders */
48 int size; /* size of disk in sectors */
49 int step; /* steps per cylinder */
50 int rate; /* transfer speed code */
51 u_char fillbyte; /* format fill byte */
52 u_char interleave; /* interleave factor (formatting) */
53 const char *name;
54};
55
56/* software state, per disk (with up to 4 disks per ctlr) */
57struct fd_softc {
58 device_t sc_dev;
59 struct disk sc_dk;
60
61 const struct fd_type *sc_deftype; /* default type descriptor */
62 struct fd_type *sc_type; /* current type descriptor */
63 struct fd_type sc_type_copy; /* copy for fiddling when formatting */
64
65 struct callout sc_motoron_ch;
66 struct callout sc_motoroff_ch;
67
68 daddr_t sc_blkno; /* starting block number */
69 int sc_bcount; /* byte count left */
70 int sc_opts; /* user-set options */
71 int sc_skip; /* bytes already transferred */
72 int sc_nblks; /* number of blocks currently transferring */
73 int sc_nbytes; /* number of bytes currently transferring */
74
75 int sc_drive; /* physical unit number */
76 int sc_flags;
77#define FD_OPEN 0x01 /* it's open */
78#define FD_MOTOR 0x02 /* motor should be on */
79#define FD_MOTOR_WAIT 0x04 /* motor coming up */
80 int sc_cylin; /* where we think the head is */
81
82 void *sc_roothook; /* mountroot hook */
83
84 TAILQ_ENTRY(fd_softc) sc_drivechain;
85 int sc_ops; /* I/O ops since last switch */
86 struct bufq_state *sc_q;/* pending I/O requests */
87 int sc_active; /* number of active I/O operations */
88
89 krndsource_t rnd_source;
90};
91