146 lines
5.9 KiB
C
146 lines
5.9 KiB
C
/* $NetBSD: fdreg.h,v 1.4 2003/09/23 21:36:08 mycroft Exp $ */
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/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fdreg.h 7.1 (Berkeley) 5/9/91
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*/
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/*
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* AT floppy controller registers and bitfields
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*/
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/* uses NEC765 controller */
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#include <dev/ic/nec765reg.h>
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/* registers */
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#define fdout 0 /* Digital Output Register (W) */
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#define FDO_FDSEL 0x03 /* floppy device select */
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#define FDO_FRST 0x04 /* floppy controller reset */
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#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
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#define FDO_MOEN(n) ((1 << n) * 0x10) /* motor enable */
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#define fdsts 2 /* NEC 765 Main Status Register (R) */
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#define FDS_DRVBUSY(n) ((1 << n) * 0x01) /* drive busy */
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#define fddata 3 /* NEC 765 Data Register (R/W) */
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#define fdctl 5 /* Control Register (W) */
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#define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */
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#define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */
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#define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */
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#define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */
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#define fdin 5 /* Digital Input Register (R) */
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#define FDI_DCHG 0x80 /* diskette has been changed */
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#define FDC_BSIZE 512
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/*
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* This constant is a little misleading. Historically, the floppy
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* controller is located at 0x3f0-0x3f7, but the actual registers
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* are 0x3f2, 0x3f3, 0x3f4, and 0x3f7. This constant assumes the
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* historic range, but the offsets above reflect the `real' offsets.
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*/
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#define FDC_NPORT 8
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/*
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* Copyright (C) 1992-1994 by Joerg Wunsch, Dresden
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* From: FreeBSD: Id: ioctl_fd.h,v 1.7 1994/10/30 19:17:39 joerg Exp
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*/
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#define FD_MAX_NSEC 36 /* highest known number of spt - allow for */
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/* 2.88 MB drives */
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struct ne7_fd_formb {
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int cyl, head;
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int transfer_rate; /* fdreg.h: FDC_???KBPS */
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union {
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struct fd_form_data {
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/*
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* DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
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* it is hardware-dependant since it exactly
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* matches the byte sequence to write to FDC
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* during its `format track' operation
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*/
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u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
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u_char nsecs; /* must be <= FD_MAX_NSEC */
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u_char gaplen; /* GAP 3 length; usually 84 */
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u_char fillbyte; /* usually 0xf6 */
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struct fd_idfield_data {
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/*
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* data to write into id fields;
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* for obscure formats, they mustn't match
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* the real values (but mostly do)
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*/
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u_char cylno; /* 0 thru 79 (or 39) */
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u_char headno; /* 0, or 1 */
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u_char secno; /* starting at 1! */
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u_char secsize; /* usually 2 */
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} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
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} structured;
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u_char raw[1]; /* to have continuous indexed access */
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} format_info;
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};
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/* make life easier */
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# define fd_formb_secshift format_info.structured.secshift
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# define fd_formb_nsecs format_info.structured.nsecs
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# define fd_formb_gaplen format_info.structured.gaplen
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# define fd_formb_fillbyte format_info.structured.fillbyte
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/* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
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# define fd_formb_cylno(i) format_info.structured.idfields[i].cylno
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# define fd_formb_headno(i) format_info.structured.idfields[i].headno
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# define fd_formb_secno(i) format_info.structured.idfields[i].secno
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# define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
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