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