sys/i386/include/ioctl_fd.h

/*
 * Copyright (C) 1992-1993 by Joerg Wunsch, Dresden
 * All rights reserved.
 *
 * 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 AUTHOR ``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 REGENTS 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.
 */

#ifndef _IOCTL_FD_H
#define _IOCTL_FD_H

#include <sys/types.h>
#include <sys/ioctl.h>

#define FD_FORMAT_VERSION 110   /* used to validate before formatting */
#define FD_MAX_NSEC 36          /* highest known number of spt - allow for */
                                /* 2.88 MB drives */

struct fd_formb {
        int format_version;     /* == FD_FORMAT_VERSION */
        int cyl, head;
        int transfer_rate;      /* fdreg.h: FDC_???KBPS */

        union {
                struct fd_form_data {
                        /*
                         * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
                         * it is hardware-dependant since it exactly
                         * matches the byte sequence to write to FDC
                         * during its `format track' operation
                         */
                        u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
                        u_char nsecs;   /* must be <= FD_MAX_NSEC */
                        u_char gaplen;  /* GAP 3 length; usually 84 */
                        u_char fillbyte; /* usually 0xf6 */
                        struct fd_idfield_data {
                                /*
                                 * data to write into id fields;
                                 * for obscure formats, they mustn't match
                                 * the real values (but mostly do)
                                 */
                                u_char cylno;   /* 0 thru 79 (or 39) */
                                u_char headno;  /* 0, or 1 */
                                u_char secno;   /* starting at 1! */
                                u_char secsize; /* usually 2 */
                        } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
                } structured;
                u_char raw[1];  /* to have continuous indexed access */
        } format_info;
};

/* make life easier */
# define fd_formb_secshift   format_info.structured.secshift
# define fd_formb_nsecs      format_info.structured.nsecs
# define fd_formb_gaplen     format_info.structured.gaplen
# define fd_formb_fillbyte   format_info.structured.fillbyte
/* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
# define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
# define fd_formb_headno(i)  format_info.structured.idfields[i].headno
# define fd_formb_secno(i)   format_info.structured.idfields[i].secno
# define fd_formb_secsize(i) format_info.structured.idfields[i].secsize

struct fd_type {
        int     sectrac;                /* sectors per track         */
        int     secsize;                /* size code for sectors     */
        int     datalen;                /* data len when secsize = 0 */
        int     gap;                    /* gap len between sectors   */
        int     tracks;                 /* total num of tracks       */
        int     size;                   /* size of disk in sectors   */
        int     steptrac;               /* steps per cylinder        */
        int     trans;                  /* transfer speed code       */
        int     heads;                  /* number of heads           */
        int     f_gap;                  /* format gap len            */
        int     f_inter;                /* format interleave factor  */
};

#define FD_FORM   _IOW('F', 61, struct fd_formb) /* format a track */
#define FD_GTYPE  _IOR('F', 62, struct fd_type)  /* get drive type */

#endif  /* !def _IOCTL_FD_H */