103 lines
4.7 KiB
C
103 lines
4.7 KiB
C
/* $NetBSD: fdreg.h,v 1.1.1.1 1996/05/05 12:17:03 oki 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* x680x0 floppy controller registers and bitfields
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*/
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/* uses NEC72065 controller */
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#include <dev/ic/nec765reg.h>
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/* Status registers returned as result of operation. */
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#define ST0 0x00 /* status register 0 */
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#define ST1 0x01 /* status register 1 */
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#define ST2 0x02 /* status register 2 */
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#define ST3 0x00 /* status register 3 (return by DRIVE_SENSE) */
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#define ST_CYL 0x03 /* slot where controller reports cylinder */
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#define ST_HEAD 0x04 /* slot where controller reports head */
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#define ST_SEC 0x05 /* slot where controller reports sector */
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#define ST_PCN 0x01 /* slot where controller reports present cyl */
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/* Fields within the I/O ports. */
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/* FDD registers */
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#define EJECT 0x20
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#define MOTOR_ON 0x80
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/* Floppy disk controller command bytes. */
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#define FDC_SEEK 0x0F /* command the drive to seek */
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#define FDC_READ 0xE6 /* command the drive to read */
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#define FDC_WRITE 0xC5 /* command the drive to write */
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#define FDC_SENSE 0x08 /* command the controller to tell its status */
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#define FDC_RECALIBRATE 0x07 /* command the drive to go to cyl 0 */
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#define FDC_SPECIFY 0x03 /* command the drive to accept params */
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#define FDC_READ_ID 0x4A /* command the drive to read sector identity */
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#define FDC_FORMAT 0x4D /* command the drive to format a track */
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#define FDC_RESET 0x36 /* reset command for fdc */
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/* Main status register. */
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#define NE7_D0B 0x01 /* Diskette drive 0 is seeking, thus busy */
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#define NE7_D1B 0x02 /* Diskette drive 1 is seeking, thus busy */
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#define NE7_D2B 0x01 /* Diskette drive 2 is seeking, thus busy */
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#define NE7_D3B 0x02 /* Diskette drive 3 is seeking, thus busy */
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#define NE7_CB 0x10 /* Diskette Controller Busy */
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#define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */
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#define NE7_DIO 0x40 /* Diskette Controller Data register I/O */
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#define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */
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/* registers */
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#define fdout 2 /* 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 4 /* NEC 765 Main Status Register (R) */
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#define fddata 5 /* NEC 765 Data Register (R/W) */
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#define fdctl 7 /* 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 7 /* 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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#define FDC_NPORT 8
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#define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */
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