103 lines
4.4 KiB
C
103 lines
4.4 KiB
C
/* $NetBSD: fdreg.h,v 1.2 1996/03/18 20:50:02 mark 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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* AT floppy controller registers and bitfields
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*/
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/*
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* Nec 765 floppy disc controller definitions
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*/
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/* Main status register */
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#define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */
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#define NE7_DBB 0x02 /* Diskette drive B 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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/* Status register ST0 */
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#define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head"
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/* Status register ST1 */
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#define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am"
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/* Status register ST2 */
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#define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam"
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/* Status register ST3 */
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#define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002"
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/* Commands */
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#define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit
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parameters byte */
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#define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */
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#define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */
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#define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */
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#define NE7CMD_FORMAT 0x4c /* format - requires five additional bytes */
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#define NE7CMD_RECAL 7 /* recalibrate drive - requires
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unit select byte */
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#define NE7CMD_SENSEI 8 /* sense controller interrupt status */
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#define NE7CMD_SEEK 15 /* seek drive - requires unit select byte
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and new cyl byte */
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#define NE7CMD_CONFIGURE 0x13
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/* registers */
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#define fdout 8 /* 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 16 /* NEC 765 Main Status Register (R) */
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#define fddata 20 /* NEC 765 Data Register (R/W) */
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#define fdctl 28 /* 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 28 /* 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 32
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#define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */
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