sys/arch/acorn32/mainbus/fdreg.h

   1 /*      $NetBSD: fdreg.h,v 1.2.2.3 2004/09/21 13:11:28 skrll Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1991 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)fdreg.h     7.1 (Berkeley) 5/9/91
  32  *      from: fdreg.h,v 1.9 1996/11/29 16:28:40 jtk
  33  */
  34
  35 /*
  36  * AT floppy controller registers and bitfields
  37  */
  38
  39 /* uses NEC765 controller */
  40 #include <dev/ic/nec765reg.h>
  41
  42 /* registers */
  43 #define fdout   2       /* Digital Output Register (W) */
  44 #define FDO_FDSEL       0x03    /*  floppy device select */
  45 #define FDO_FRST        0x04    /*  floppy controller reset */
  46 #define FDO_FDMAEN      0x08    /*  enable floppy DMA and Interrupt */
  47 #define FDO_MOEN(n)     ((1 << n) * 0x10)       /* motor enable */
  48
  49 #define fdsts   4       /* NEC 765 Main Status Register (R) */
  50 #define fddata  5       /* NEC 765 Data Register (R/W) */
  51
  52 #define fdctl   7       /* Control Register (W) */
  53 #define FDC_500KBPS     0x00    /* 500KBPS MFM drive transfer rate */
  54 #define FDC_300KBPS     0x01    /* 300KBPS MFM drive transfer rate */
  55 #define FDC_250KBPS     0x02    /* 250KBPS MFM drive transfer rate */
  56 #define FDC_125KBPS     0x03    /* 125KBPS FM drive transfer rate */
  57
  58 #define fdin    7       /* Digital Input Register (R) */
  59 #define FDI_DCHG        0x80    /* diskette has been changed */
  60
  61 #define FDC_BSIZE       512
  62 #define FDC_NPORT       8
  63 #define FDC_MAXIOSIZE   PAGE_SIZE       /* XXX should be MAXBSIZE */
  64
  65 /*
  66  * Copyright (C) 1992-1994 by Joerg Wunsch, Dresden
  67  * All rights reserved.
  68  *
  69  * Redistribution and use in source and binary forms, with or without
  70  * modification, are permitted provided that the following conditions
  71  * are met:
  72  * 1. Redistributions of source code must retain the above copyright
  73  *    notice, this list of conditions and the following disclaimer.
  74  * 2. Redistributions in binary form must reproduce the above copyright
  75  *    notice, this list of conditions and the following disclaimer in the
  76  *    documentation and/or other materials provided with the distribution.
  77  *
  78  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY
  79  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  80  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  81  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE
  82  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  83  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  84  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  85  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  86  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  87  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  88  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  89  * DAMAGE.
  90  *
  91  * From: FreeBSD: Id: ioctl_fd.h,v 1.7 1994/10/30 19:17:39 joerg Exp
  92  */
  93
  94 #define FD_MAX_NSEC 36          /* highest known number of spt - allow for */
  95                                 /* 2.88 MB drives */
  96
  97 struct ne7_fd_formb {
  98         int cyl, head;
  99         int transfer_rate;      /* fdreg.h: FDC_???KBPS */
 100
 101         union {
 102                 struct fd_form_data {
 103                         /*
 104                          * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
 105                          * it is hardware-dependant since it exactly
 106                          * matches the byte sequence to write to FDC
 107                          * during its `format track' operation
 108                          */
 109                         u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
 110                         u_char nsecs;   /* must be <= FD_MAX_NSEC */
 111                         u_char gaplen;  /* GAP 3 length; usually 84 */
 112                         u_char fillbyte; /* usually 0xf6 */
 113                         struct fd_idfield_data {
 114                                 /*
 115                                  * data to write into id fields;
 116                                  * for obscure formats, they mustn't match
 117                                  * the real values (but mostly do)
 118                                  */
 119                                 u_char cylno;   /* 0 thru 79 (or 39) */
 120                                 u_char headno;  /* 0, or 1 */
 121                                 u_char secno;   /* starting at 1! */
 122                                 u_char secsize; /* usually 2 */
 123                         } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
 124                 } structured;
 125                 u_char raw[1];  /* to have continuous indexed access */
 126         } format_info;
 127 };
 128
 129 /* make life easier */
 130 # define fd_formb_secshift   format_info.structured.secshift
 131 # define fd_formb_nsecs      format_info.structured.nsecs
 132 # define fd_formb_gaplen     format_info.structured.gaplen
 133 # define fd_formb_fillbyte   format_info.structured.fillbyte
 134 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
 135 # define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
 136 # define fd_formb_headno(i)  format_info.structured.idfields[i].headno
 137 # define fd_formb_secno(i)   format_info.structured.idfields[i].secno
 138 # define fd_formb_secsize(i) format_info.structured.idfields[i].secsize