1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)fdreg.h 7.1 (Berkeley) 5/9/91 34 * $FreeBSD: src/sys/isa/fdreg.h,v 1.13 2000/01/06 07:13:54 imp Exp $ 35 * $DragonFly: src/sys/dev/disk/fd/fdreg.h,v 1.3 2003/08/07 21:16:52 dillon Exp $ 36 */ 37 38 /* 39 * AT floppy controller registers and bitfields 40 */ 41 42 /* uses NEC765 controller */ 43 #include "nec765.h" 44 45 /* registers */ 46 #define FDOUT 2 /* Digital Output Register (W) */ 47 #define FDO_FDSEL 0x03 /* floppy device select */ 48 #define FDO_FRST 0x04 /* floppy controller reset */ 49 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ 50 #define FDO_MOEN0 0x10 /* motor enable drive 0 */ 51 #define FDO_MOEN1 0x20 /* motor enable drive 1 */ 52 #define FDO_MOEN2 0x40 /* motor enable drive 2 */ 53 #define FDO_MOEN3 0x80 /* motor enable drive 3 */ 54 55 #define FDSTS 4 /* NEC 765 Main Status Register (R) */ 56 #define FDDATA 5 /* NEC 765 Data Register (R/W) */ 57 #define FDCTL 7 /* Control Register (W) */ 58 59 #ifndef FDC_500KBPS 60 # define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */ 61 # define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */ 62 # define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */ 63 # define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */ 64 /* for some controllers 1MPBS instead */ 65 #endif /* FDC_500KBPS */ 66 67 /* 68 * this is the secret PIO data port (offset from base) 69 */ 70 #define FDC_YE_DATAPORT 6 71 72 #define FDIN 7 /* Digital Input Register (R) */ 73 #define FDI_DCHG 0x80 /* diskette has been changed */ 74 /* requires drive and motor being selected */ 75 /* is cleared by any step pulse to drive */ 76