NetBSD/sys/arch/x68k/dev/fdreg.h

103 lines
4.7 KiB
C

/* $NetBSD: fdreg.h,v 1.1.1.1 1996/05/05 12:17:03 oki 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
*/
/*
* x680x0 floppy controller registers and bitfields
*/
/* uses NEC72065 controller */
#include <dev/ic/nec765reg.h>
/* Status registers returned as result of operation. */
#define ST0 0x00 /* status register 0 */
#define ST1 0x01 /* status register 1 */
#define ST2 0x02 /* status register 2 */
#define ST3 0x00 /* status register 3 (return by DRIVE_SENSE) */
#define ST_CYL 0x03 /* slot where controller reports cylinder */
#define ST_HEAD 0x04 /* slot where controller reports head */
#define ST_SEC 0x05 /* slot where controller reports sector */
#define ST_PCN 0x01 /* slot where controller reports present cyl */
/* Fields within the I/O ports. */
/* FDD registers */
#define EJECT 0x20
#define MOTOR_ON 0x80
/* Floppy disk controller command bytes. */
#define FDC_SEEK 0x0F /* command the drive to seek */
#define FDC_READ 0xE6 /* command the drive to read */
#define FDC_WRITE 0xC5 /* command the drive to write */
#define FDC_SENSE 0x08 /* command the controller to tell its status */
#define FDC_RECALIBRATE 0x07 /* command the drive to go to cyl 0 */
#define FDC_SPECIFY 0x03 /* command the drive to accept params */
#define FDC_READ_ID 0x4A /* command the drive to read sector identity */
#define FDC_FORMAT 0x4D /* command the drive to format a track */
#define FDC_RESET 0x36 /* reset command for fdc */
/* Main status register. */
#define NE7_D0B 0x01 /* Diskette drive 0 is seeking, thus busy */
#define NE7_D1B 0x02 /* Diskette drive 1 is seeking, thus busy */
#define NE7_D2B 0x01 /* Diskette drive 2 is seeking, thus busy */
#define NE7_D3B 0x02 /* Diskette drive 3 is seeking, thus busy */
#define NE7_CB 0x10 /* Diskette Controller Busy */
#define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */
#define NE7_DIO 0x40 /* Diskette Controller Data register I/O */
#define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */
/* registers */
#define fdout 2 /* 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 4 /* NEC 765 Main Status Register (R) */
#define fddata 5 /* NEC 765 Data Register (R/W) */
#define fdctl 7 /* 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 7 /* Digital Input Register (R) */
#define FDI_DCHG 0x80 /* diskette has been changed */
#define FDC_BSIZE 512
#define FDC_NPORT 8
#define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */