FreeBSD/Linux Kernel Cross Reference
sys/isa/fdreg.h
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 * $FreeBSD$
35 */
36
37 /*
38 * AT floppy controller registers and bitfields
39 */
40
41 /* uses NEC765 controller */
42 #include <isa/ic/nec765.h>
43
44 /* registers */
45 #define FDOUT 2 /* Digital Output Register (W) */
46 #define FDO_FDSEL 0x03 /* floppy device select */
47 #define FDO_FRST 0x04 /* floppy controller reset */
48 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
49 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
50 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
51 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
52 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
53
54 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
55 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
56 #define FDCTL 7 /* Control Register (W) */
57
58 #ifndef FDC_500KBPS
59 # define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */
60 # define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */
61 # define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */
62 # define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */
63 /* for some controllers 1MPBS instead */
64 #endif /* FDC_500KBPS */
65
66 /*
67 * this is the secret PIO data port (offset from base)
68 */
69 #define FDC_YE_DATAPORT 6
70
71 #define FDIN 7 /* Digital Input Register (R) */
72 #define FDI_DCHG 0x80 /* diskette has been changed */
73 /* requires drive and motor being selected */
74 /* is cleared by any step pulse to drive */
Cache object: 843c237c24357cc649b416f973ecf69c
|