sys/arch/arc/jazz/fdreg.h

   1 /*      $NetBSD: fdreg.h,v 1.2.24.3 2004/09/21 13:13:01 skrll Exp $     */
   2 /*      $OpenBSD: fdreg.h,v 1.1.1.1 1996/06/24 09:07:19 pefo Exp $      */
   3 /*      NetBSD: fdreg.h,v 1.8 1995/06/28 04:30:57 cgd Exp       */
   4
   5 /*-
   6  * Copyright (c) 1991 The Regents of the University of California.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)fdreg.h     7.1 (Berkeley) 5/9/91
  34  */
  35
  36 /*
  37  * AT floppy controller registers and bitfields
  38  */
  39
  40 /* uses NEC765 controller */
  41 #include <dev/ic/nec765reg.h>
  42
  43 /* registers */
  44 #define FDOUT   0       /* Digital Output Register (W) */
  45 #define FDO_FDSEL       0x03    /*  floppy device select */
  46 #define FDO_FRST        0x04    /*  floppy controller reset */
  47 #define FDO_FDMAEN      0x08    /*  enable floppy DMA and Interrupt */
  48 #define FDO_MOEN(n)     ((1 << n) * 0x10)       /* motor enable */
  49
  50 #define FDSTS   2       /* NEC 765 Main Status Register (R) */
  51 #define FDDATA  3       /* NEC 765 Data Register (R/W) */
  52
  53 #define FDCTL   5       /* Control Register (W) */
  54 #define FDC_500KBPS     0x00    /* 500KBPS MFM drive transfer rate */
  55 #define FDC_300KBPS     0x01    /* 300KBPS MFM drive transfer rate */
  56 #define FDC_250KBPS     0x02    /* 250KBPS MFM drive transfer rate */
  57 #define FDC_125KBPS     0x03    /* 125KBPS FM drive transfer rate */
  58
  59 #define FDIN    5       /* Digital Input Register (R) */
  60 #define FDI_DCHG        0x80    /* diskette has been changed */
  61
  62 #define FDC_BSIZE       512
  63 #if 0
  64 #define FDC_NPORT       8
  65 #endif