NetBSD-5.0.2/sys/dev/isa/fdreg.h
/* $NetBSD: fdreg.h,v 1.6 2005/12/11 12:22:02 christos Exp $ */
/*-
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)fdreg.h 7.1 (Berkeley) 5/9/91
*/
/*
* AT floppy controller registers and bitfields
*/
/* uses NEC765 controller */
#include <dev/ic/nec765reg.h>
/* registers */
#define fdout 0 /* Digital Output Register (W) */
#define FDO_FDSEL 0x03 /* floppy device select */
#define FDO_FRST 0x04 /* floppy controller reset */
#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
#define FDO_MOEN(n) ((1 << n) * 0x10) /* motor enable */
#define fdsts 2 /* NEC 765 Main Status Register (R) */
#define FDS_DRVBUSY(n) ((1 << n) * 0x01) /* drive busy */
#define fddata 3 /* NEC 765 Data Register (R/W) */
#define fdctl 5 /* Control Register (W) */
#define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */
#define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */
#define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */
#define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */
#define fdin 5 /* Digital Input Register (R) */
#define FDI_DCHG 0x80 /* diskette has been changed */
#define FDC_BSIZE 512
/*
* This constant is a little misleading. Historically, the floppy
* controller is located at 0x3f0-0x3f7, but the actual registers
* are 0x3f2, 0x3f3, 0x3f4, and 0x3f7. This constant assumes the
* historic range, but the offsets above reflect the `real' offsets.
*/
#define FDC_NPORT 8
/*
* Copyright (C) 1992-1994 by Joerg Wunsch, Dresden
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* From: FreeBSD: Id: ioctl_fd.h,v 1.7 1994/10/30 19:17:39 joerg Exp
*/
#define FD_MAX_NSEC 36 /* highest known number of spt - allow for */
/* 2.88 MB drives */
struct ne7_fd_formb {
int cyl, head;
int transfer_rate; /* fdreg.h: FDC_???KBPS */
union {
struct fd_form_data {
/*
* DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
* it is hardware-dependant since it exactly
* matches the byte sequence to write to FDC
* during its `format track' operation
*/
u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
u_char nsecs; /* must be <= FD_MAX_NSEC */
u_char gaplen; /* GAP 3 length; usually 84 */
u_char fillbyte; /* usually 0xf6 */
struct fd_idfield_data {
/*
* data to write into id fields;
* for obscure formats, they mustn't match
* the real values (but mostly do)
*/
u_char cylno; /* 0 thru 79 (or 39) */
u_char headno; /* 0, or 1 */
u_char secno; /* starting at 1! */
u_char secsize; /* usually 2 */
} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
} structured;
u_char raw[1]; /* to have continuous indexed access */
} format_info;
};
/* make life easier */
# define fd_formb_secshift format_info.structured.secshift
# define fd_formb_nsecs format_info.structured.nsecs
# define fd_formb_gaplen format_info.structured.gaplen
# define fd_formb_fillbyte format_info.structured.fillbyte
/* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
# define fd_formb_cylno(i) format_info.structured.idfields[i].cylno
# define fd_formb_headno(i) format_info.structured.idfields[i].headno
# define fd_formb_secno(i) format_info.structured.idfields[i].secno
# define fd_formb_secsize(i) format_info.structured.idfields[i].secsize