/* $NetBSD: fdvar.h,v 1.9 2015/04/13 16:33:24 riastradh Exp $ */

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/rndsource.h>

/*
 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
 * we tell them apart.
 */
struct fd_type {
        int     sectrac;        /* sectors per track */
        int     heads;          /* number of heads */
        int     seccyl;         /* sectors per cylinder */
        int     secsize;        /* size code for sectors */
        int     datalen;        /* data len when secsize = 0 */
        int     steprate;       /* step rate and head unload time */
        int     gap1;           /* gap len between sectors */
        int     gap2;           /* formatting gap */
        int     cyls;           /* total num of cylinders */
        int     size;           /* size of disk in sectors */
        int     step;           /* steps per cylinder */
        int     rate;           /* transfer speed code */
        u_char  fillbyte;       /* format fill byte */
        u_char  interleave;     /* interleave factor (formatting) */
        const char      *name;
};

/* software state, per disk (with up to 4 disks per ctlr) */
struct fd_softc {
        device_t sc_dev;
        struct disk sc_dk;

        const struct fd_type *sc_deftype; /* default type descriptor */
        struct fd_type *sc_type;        /* current type descriptor */
        struct fd_type sc_type_copy;    /* copy for fiddling when formatting */

        struct callout sc_motoron_ch;
        struct callout sc_motoroff_ch;

        daddr_t sc_blkno;       /* starting block number */
        int sc_bcount;          /* byte count left */
        int sc_opts;            /* user-set options */
        int sc_skip;            /* bytes already transferred */
        int sc_nblks;           /* number of blocks currently transferring */
        int sc_nbytes;          /* number of bytes currently transferring */

        int sc_drive;           /* physical unit number */
        int sc_flags;
#define FD_OPEN         0x01            /* it's open */
#define FD_MOTOR        0x02            /* motor should be on */
#define FD_MOTOR_WAIT   0x04            /* motor coming up */
        int sc_cylin;           /* where we think the head is */

        void *sc_roothook;      /* mountroot hook */

        TAILQ_ENTRY(fd_softc) sc_drivechain;
        int sc_ops;             /* I/O ops since last switch */
        struct bufq_state *sc_q;/* pending I/O requests */
        int sc_active;          /* number of active I/O operations */

        krndsource_t    rnd_source;
};