sys/i386/isa/fdc.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 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.
 *
 *      from:   @(#)fd.c        7.4 (Berkeley) 5/25/91
 *      $Id:$
 *
 */


/***********************************************************************\
* Per controller structure.                                             *
\***********************************************************************/
struct fdc_data
{
        int     fdcu;           /* our unit number */
        int     baseport;
        int     dmachan;
        int     flags;
#define FDC_ATTACHED    0x01
#define FDC_HASFTAPE    0x02
#define FDC_TAPE_BUSY   0x04
        struct  fd_data *fd;
        int fdu;                /* the active drive     */
        struct buf head;        /* Head of buf chain      */
        struct buf rhead;       /* Raw head of buf chain  */
        int state;
        int retry;
        int status[7];          /* copy of the registers */
};

/***********************************************************************\
* Throughout this file the following conventions will be used:          *
* fd is a pointer to the fd_data struct for the drive in question       *
* fdc is a pointer to the fdc_data struct for the controller            *
* fdu is the floppy drive unit number                                   *
* fdcu is the floppy controller unit number                             *
* fdsu is the floppy drive unit number on that controller. (sub-unit)   *
\***********************************************************************/
typedef int     fdu_t;
typedef int     fdcu_t;
typedef int     fdsu_t;
typedef struct fd_data *fd_p;
typedef struct fdc_data *fdc_p;

#define FDUNIT(s)       (((s)>>6)&03)
#define FDTYPE(s)       ((s)&077)