sys/dev/isa/fdvar.h

   1 /* $NetBSD: fdvar.h,v 1.5 2008/03/16 00:58:56 cube 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 "rnd.h"
  33
  34 #if NRND > 0
  35 #include <sys/rnd.h>
  36 #endif
  37
  38 /*
  39  * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
  40  * we tell them apart.
  41  */
  42 struct fd_type {
  43         int     sectrac;        /* sectors per track */
  44         int     heads;          /* number of heads */
  45         int     seccyl;         /* sectors per cylinder */
  46         int     secsize;        /* size code for sectors */
  47         int     datalen;        /* data len when secsize = 0 */
  48         int     steprate;       /* step rate and head unload time */
  49         int     gap1;           /* gap len between sectors */
  50         int     gap2;           /* formatting gap */
  51         int     cyls;           /* total num of cylinders */
  52         int     size;           /* size of disk in sectors */
  53         int     step;           /* steps per cylinder */
  54         int     rate;           /* transfer speed code */
  55         u_char  fillbyte;       /* format fill byte */
  56         u_char  interleave;     /* interleave factor (formatting) */
  57         const char      *name;
  58 };
  59
  60 /* software state, per disk (with up to 4 disks per ctlr) */
  61 struct fd_softc {
  62         device_t sc_dev;
  63         struct disk sc_dk;
  64
  65         const struct fd_type *sc_deftype; /* default type descriptor */
  66         struct fd_type *sc_type;        /* current type descriptor */
  67         struct fd_type sc_type_copy;    /* copy for fiddling when formatting */
  68
  69         struct callout sc_motoron_ch;
  70         struct callout sc_motoroff_ch;
  71
  72         daddr_t sc_blkno;       /* starting block number */
  73         int sc_bcount;          /* byte count left */
  74         int sc_opts;            /* user-set options */
  75         int sc_skip;            /* bytes already transferred */
  76         int sc_nblks;           /* number of blocks currently transferring */
  77         int sc_nbytes;          /* number of bytes currently transferring */
  78
  79         int sc_drive;           /* physical unit number */
  80         int sc_flags;
  81 #define FD_OPEN         0x01            /* it's open */
  82 #define FD_MOTOR        0x02            /* motor should be on */
  83 #define FD_MOTOR_WAIT   0x04            /* motor coming up */
  84         int sc_cylin;           /* where we think the head is */
  85
  86         void *sc_roothook;      /* mountroot hook */
  87
  88         TAILQ_ENTRY(fd_softc) sc_drivechain;
  89         int sc_ops;             /* I/O ops since last switch */
  90         struct bufq_state *sc_q;/* pending I/O requests */
  91         int sc_active;          /* number of active I/O operations */
  92
  93 #if NRND > 0
  94         rndsource_element_t     rnd_source;
  95 #endif
  96 };