/*      $NetBSD: fdreg.h,v 1.4 2005/12/11 12:16:39 christos Exp $       */
/*      $OpenBSD: fdreg.h,v 1.1.1.1 1996/06/24 09:07:19 pefo Exp $      */
/*      NetBSD: fdreg.h,v 1.8 1995/06/28 04:30:57 cgd Exp       */

/*-
* Copyright (c) 1991 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. 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.
*
*      @(#)fdreg.h     7.1 (Berkeley) 5/9/91
*/

/*
* AT floppy controller registers and bitfields
*/

/* uses NEC765 controller */
#include <dev/ic/nec765reg.h>

/* registers */
#define FDOUT   0       /* Digital Output Register (W) */
#define FDO_FDSEL       0x03    /*  floppy device select */
#define FDO_FRST        0x04    /*  floppy controller reset */
#define FDO_FDMAEN      0x08    /*  enable floppy DMA and Interrupt */
#define FDO_MOEN(n)     ((1 << n) * 0x10)       /* motor enable */

#define FDSTS   2       /* NEC 765 Main Status Register (R) */
#define FDDATA  3       /* NEC 765 Data Register (R/W) */

#define FDCTL   5       /* Control Register (W) */
#define FDC_500KBPS     0x00    /* 500KBPS MFM drive transfer rate */
#define FDC_300KBPS     0x01    /* 300KBPS MFM drive transfer rate */
#define FDC_250KBPS     0x02    /* 250KBPS MFM drive transfer rate */
#define FDC_125KBPS     0x03    /* 125KBPS FM drive transfer rate */

#define FDIN    5       /* Digital Input Register (R) */
#define FDI_DCHG        0x80    /* diskette has been changed */

#define FDC_BSIZE       512
#if 0
#define FDC_NPORT       8
#endif