1 /* $OpenBSD: fdreg.h,v 1.12 2006/08/13 03:36:24 krw Exp $ */
2 /* $NetBSD: fdreg.h,v 1.8 1995/06/28 04:30:57 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1991 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)fdreg.h 7.1 (Berkeley) 5/9/91
33 */
34
35 /*
36 * AT floppy controller registers and bitfields
37 */
38
39 /* uses NEC765 controller */
40 #include <dev/ic/nec765reg.h>
41
42 /* registers */
43 #define fdout 2 /* Digital Output Register (W) */
44 #define FDO_FDSEL 0x03 /* floppy device select */
45 #define FDO_FRST 0x04 /* floppy controller reset */
46 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
47 #define FDO_MOEN(n) ((1 << n) * 0x10) /* motor enable */
48
49 #define fdsts 4 /* NEC 765 Main Status Register (R) */
50 #define fddata 5 /* NEC 765 Data Register (R/W) */
51
52 #define FDCTL_OFFSET 7 /* Offset from the other registers. */
53 #define fdctl 0 /* Control Register (W) */
54 #define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */
55 #define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */
56 #define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */
57 #define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */
58
59 #define fdin 0 /* Digital Input Register (R) */
60 #define FDI_DCHG 0x80 /* diskette has been changed */
61
62 #define FDC_NPORT 6
63 #define FDCTL_NPORT 1
64 #define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */
65 #define FD_BSIZE(fd) (128 << fd->sc_type->secsize)
66
67 #define FDUNIT(dev) ((dev & 0x80) >> 7) /* XXX two drives max, sorry */
68 #define FDTYPE(dev) ((minor(dev) & 0x70) >> 4)
69 #define FDPART(dev) (minor(dev) & 0x0f)