fdreg.h revision 1.3
1 /* $NetBSD: fdreg.h,v 1.3 2003/08/07 16:31:07 agc 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 fddata 3 /* NEC 765 Data Register (R/W) */ 50 51 #define fdctl 5 /* Control Register (W) */ 52 #define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */ 53 #define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */ 54 #define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */ 55 #define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */ 56 57 #define fdin 5 /* Digital Input Register (R) */ 58 #define FDI_DCHG 0x80 /* diskette has been changed */ 59 60 #define FDC_BSIZE 512 61 62 /* 63 * This constant is a little misleading. Historically, the floppy 64 * controller is located at 0x3f0-0x3f7, but the actual registers 65 * are 0x3f2, 0x3f3, 0x3f4, and 0x3f7. This constant assumes the 66 * historic range, but the offsets above reflect the `real' offsets. 67 */ 68 #define FDC_NPORT 8 69 70 /* 71 * Copyright (C) 1992-1994 by Joerg Wunsch, Dresden 72 * All rights reserved. 73 * 74 * Redistribution and use in source and binary forms, with or without 75 * modification, are permitted provided that the following conditions 76 * are met: 77 * 1. Redistributions of source code must retain the above copyright 78 * notice, this list of conditions and the following disclaimer. 79 * 2. Redistributions in binary form must reproduce the above copyright 80 * notice, this list of conditions and the following disclaimer in the 81 * documentation and/or other materials provided with the distribution. 82 * 83 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY 84 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 85 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 86 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE 87 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 88 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 89 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 90 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 91 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 92 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 93 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 94 * DAMAGE. 95 * 96 * From: FreeBSD: Id: ioctl_fd.h,v 1.7 1994/10/30 19:17:39 joerg Exp 97 */ 98 99 #define FD_MAX_NSEC 36 /* highest known number of spt - allow for */ 100 /* 2.88 MB drives */ 101 102 struct ne7_fd_formb { 103 int cyl, head; 104 int transfer_rate; /* fdreg.h: FDC_???KBPS */ 105 106 union { 107 struct fd_form_data { 108 /* 109 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS 110 * it is hardware-dependant since it exactly 111 * matches the byte sequence to write to FDC 112 * during its `format track' operation 113 */ 114 u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */ 115 u_char nsecs; /* must be <= FD_MAX_NSEC */ 116 u_char gaplen; /* GAP 3 length; usually 84 */ 117 u_char fillbyte; /* usually 0xf6 */ 118 struct fd_idfield_data { 119 /* 120 * data to write into id fields; 121 * for obscure formats, they mustn't match 122 * the real values (but mostly do) 123 */ 124 u_char cylno; /* 0 thru 79 (or 39) */ 125 u_char headno; /* 0, or 1 */ 126 u_char secno; /* starting at 1! */ 127 u_char secsize; /* usually 2 */ 128 } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */ 129 } structured; 130 u_char raw[1]; /* to have continuous indexed access */ 131 } format_info; 132 }; 133 134 /* make life easier */ 135 # define fd_formb_secshift format_info.structured.secshift 136 # define fd_formb_nsecs format_info.structured.nsecs 137 # define fd_formb_gaplen format_info.structured.gaplen 138 # define fd_formb_fillbyte format_info.structured.fillbyte 139 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */ 140 # define fd_formb_cylno(i) format_info.structured.idfields[i].cylno 141 # define fd_formb_headno(i) format_info.structured.idfields[i].headno 142 # define fd_formb_secno(i) format_info.structured.idfields[i].secno 143 # define fd_formb_secsize(i) format_info.structured.idfields[i].secsize 144
Indexes created Fri Sep 26 20:09:58 GMT 2025