1 /* $NetBSD: mcclock_pad32.c,v 1.16 2009/03/14 21:04:19 dsl Exp $ */
2
3 /*
4 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: mcclock_pad32.c,v 1.16 2009/03/14 21:04:19 dsl Exp $");
32
33
34 /*
35 * mc1461818 (or compatible) clock chip driver, for machines where each
36 * byte-wide mcclock chip register is mapped
37 * into the low-order byte of a little-endian 32-bit word.
38 *
39 * DECstation 2100/3100
40 * DECstation 5100
41 * DECstation 5000/200 baseboard
42 * IOCTL asic machines (Alpha 3000 series, Decstation 5000 series)
43 *
44 * bus-specific frontends should just declare an attach and match
45 * entry, and set up a initializea switch to call the functions below.
46 */
47
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51 #include <sys/device.h>
52 #include <dev/clock_subr.h>
53
54 #include <machine/autoconf.h>
55 #include <dev/dec/clockvar.h>
56 #include <dev/dec/mcclockvar.h>
57 #include <dev/ic/mc146818reg.h>
58
59 #include <dev/dec/mcclock_pad32.h>
60
61
62 void mcclock_pad32_write(struct mcclock_softc *, u_int, u_int);
63 u_int mcclock_pad32_read(struct mcclock_softc *, u_int);
64
65 const struct mcclock_busfns mcclock_pad32_busfns = {
66 mcclock_pad32_write, mcclock_pad32_read,
67 };
68
69 void
mcclock_pad32_write(struct mcclock_softc * dev,u_int reg,u_int datum)70 mcclock_pad32_write(struct mcclock_softc *dev, u_int reg, u_int datum)
71 {
72 struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev;
73
74 sc->sc_dp[reg].datum = datum;
75 }
76
77 u_int
mcclock_pad32_read(struct mcclock_softc * dev,u_int reg)78 mcclock_pad32_read(struct mcclock_softc *dev, u_int reg)
79 {
80 struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev;
81
82 return (sc->sc_dp[reg].datum);
83 }
84