sys/dev/isa/fdreg.h

   1 /*      $NetBSD: fdreg.h,v 1.2.30.4 2005/03/04 16:43:13 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  */
  33
  34 /*
  35  * AT floppy controller registers and bitfields
  36  */
  37
  38 /* uses NEC765 controller */
  39 #include <dev/ic/nec765reg.h>
  40
  41 /* registers */
  42 #define fdout   0       /* Digital Output Register (W) */
  43 #define FDO_FDSEL       0x03    /*  floppy device select */
  44 #define FDO_FRST        0x04    /*  floppy controller reset */
  45 #define FDO_FDMAEN      0x08    /*  enable floppy DMA and Interrupt */
  46 #define FDO_MOEN(n)     ((1 << n) * 0x10)       /* motor enable */
  47
  48 #define fdsts   2       /* NEC 765 Main Status Register (R) */
  49 #define FDS_DRVBUSY(n)  ((1 << n) * 0x01)       /* drive busy */
  50
  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
  64 /*
  65  * This constant is a little misleading.  Historically, the floppy
  66  * controller is located at 0x3f0-0x3f7, but the actual registers
  67  * are 0x3f2, 0x3f3, 0x3f4, and 0x3f7.  This constant assumes the
  68  * historic range, but the offsets above reflect the `real' offsets.
  69  */
  70 #define FDC_NPORT       8
  71
  72 /*
  73  * Copyright (C) 1992-1994 by Joerg Wunsch, Dresden
  74  * All rights reserved.
  75  *
  76  * Redistribution and use in source and binary forms, with or without
  77  * modification, are permitted provided that the following conditions
  78  * are met:
  79  * 1. Redistributions of source code must retain the above copyright
  80  *    notice, this list of conditions and the following disclaimer.
  81  * 2. Redistributions in binary form must reproduce the above copyright
  82  *    notice, this list of conditions and the following disclaimer in the
  83  *    documentation and/or other materials provided with the distribution.
  84  *
  85  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY
  86  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  87  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  88  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE
  89  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  90  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  91  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  92  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  93  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  94  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  95  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  96  * DAMAGE.
  97  *
  98  * From: FreeBSD: Id: ioctl_fd.h,v 1.7 1994/10/30 19:17:39 joerg Exp
  99  */
 100
 101 #define FD_MAX_NSEC 36          /* highest known number of spt - allow for */
 102                                 /* 2.88 MB drives */
 103
 104 struct ne7_fd_formb {
 105         int cyl, head;
 106         int transfer_rate;      /* fdreg.h: FDC_???KBPS */
 107
 108         union {
 109                 struct fd_form_data {
 110                         /*
 111                          * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
 112                          * it is hardware-dependant since it exactly
 113                          * matches the byte sequence to write to FDC
 114                          * during its `format track' operation
 115                          */
 116                         u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
 117                         u_char nsecs;   /* must be <= FD_MAX_NSEC */
 118                         u_char gaplen;  /* GAP 3 length; usually 84 */
 119                         u_char fillbyte; /* usually 0xf6 */
 120                         struct fd_idfield_data {
 121                                 /*
 122                                  * data to write into id fields;
 123                                  * for obscure formats, they mustn't match
 124                                  * the real values (but mostly do)
 125                                  */
 126                                 u_char cylno;   /* 0 thru 79 (or 39) */
 127                                 u_char headno;  /* 0, or 1 */
 128                                 u_char secno;   /* starting at 1! */
 129                                 u_char secsize; /* usually 2 */
 130                         } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
 131                 } structured;
 132                 u_char raw[1];  /* to have continuous indexed access */
 133         } format_info;
 134 };
 135
 136 /* make life easier */
 137 # define fd_formb_secshift   format_info.structured.secshift
 138 # define fd_formb_nsecs      format_info.structured.nsecs
 139 # define fd_formb_gaplen     format_info.structured.gaplen
 140 # define fd_formb_fillbyte   format_info.structured.fillbyte
 141 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
 142 # define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
 143 # define fd_formb_headno(i)  format_info.structured.idfields[i].headno
 144 # define fd_formb_secno(i)   format_info.structured.idfields[i].secno
 145 # define fd_formb_secsize(i) format_info.structured.idfields[i].secsize