FreeBSD/Linux Kernel Cross Reference
sys/pc98/pc98/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: releng/5.0/sys/pc98/pc98/fdreg.h 88011 2001-12-16 09:00:03Z nyan $
35 */
36
37 /*
38 * AT floppy controller registers and bitfields
39 */
40
41 /* uses NEC765 controller */
42 #include <dev/ic/nec765.h>
43
44 #ifdef PC98
45 /* registers */
46 #define FDSTS 0 /* NEC 765 Main Status Register (R) */
47 #define FDDATA 1 /* NEC 765 Data Register (R/W) */
48 #define FDCTL 2 /* FD Control Register */
49 #define FDC_RST 0x80 /* FDC RESET */
50 #define FDC_RDY 0x40 /* force READY */
51 #define FDC_DD 0x20 /* FDD Mode Exchange 0:1M 1:640K */
52 #define FDC_DMAE 0x10 /* enable floppy DMA */
53 #define FDC_MTON 0x08 /* MOTOR ON (when EMTON=1)*/
54 #define FDC_TMSK 0x04 /* TIMER MASK */
55 #define FDC_TTRG 0x01 /* TIMER TRIGER */
56
57 #define FDP_EMTON 0x04 /* enable MTON */
58 #define FDP_FDDEXC 0x02 /* FDD Mode Exchange 1:1M 0:640K */
59 #define FDP_PORTEXC 0x01 /* PORT Exchane 1:1M 0:640K */
60
61 #else
62 /* registers */
63 #define FDOUT 2 /* Digital Output Register (W) */
64 #define FDO_FDSEL 0x03 /* floppy device select */
65 #define FDO_FRST 0x04 /* floppy controller reset */
66 #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
67 #define FDO_MOEN0 0x10 /* motor enable drive 0 */
68 #define FDO_MOEN1 0x20 /* motor enable drive 1 */
69 #define FDO_MOEN2 0x40 /* motor enable drive 2 */
70 #define FDO_MOEN3 0x80 /* motor enable drive 3 */
71
72 #define FDSTS 4 /* NEC 765 Main Status Register (R) */
73 #define FDDATA 5 /* NEC 765 Data Register (R/W) */
74 #define FDCTL 7 /* Control Register (W) */
75 #endif /* PC98 */
76
77 /*
78 * The definitions for FDC_500KBPS etc. have been moved out to <sys/fdcio.h>
79 * since they need to be visible in userland. They cover the lower two bits
80 * of FDCTL when used for output.
81 */
82 /*
83 * this is the secret PIO data port (offset from base)
84 */
85 #define FDC_YE_DATAPORT 6
86
87 #ifndef PC98
88 #define FDIN 7 /* Digital Input Register (R) */
89 #define FDI_DCHG 0x80 /* diskette has been changed */
90 /* requires drive and motor being selected */
91 /* is cleared by any step pulse to drive */
92 #endif
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