dev/dec/mcclock_pad32.c

1.16       dsl /*	$NetBSD: mcclock_pad32.c,v 1.16 2009/03/14 21:04:19 dsl Exp $	*/
 1.2       cgd
 1.2       cgd /*
 1.2       cgd  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
 1.2       cgd  * All rights reserved.
 1.2       cgd  *
 1.2       cgd  * Author: Chris G. Demetriou
 1.2       cgd  *
 1.2       cgd  * Permission to use, copy, modify and distribute this software and
 1.2       cgd  * its documentation is hereby granted, provided that both the copyright
 1.2       cgd  * notice and this permission notice appear in all copies of the
 1.2       cgd  * software, derivative works or modified versions, and any portions
 1.2       cgd  * thereof, and that both notices appear in supporting documentation.
 1.2       cgd  *
 1.2       cgd  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 1.2       cgd  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 1.2       cgd  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 1.2       cgd  *
 1.2       cgd  * Carnegie Mellon requests users of this software to return to
 1.2       cgd  *
 1.2       cgd  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
 1.2       cgd  *  School of Computer Science
 1.2       cgd  *  Carnegie Mellon University
 1.2       cgd  *  Pittsburgh PA 15213-3890
 1.2       cgd  *
 1.2       cgd  * any improvements or extensions that they make and grant Carnegie the
 1.2       cgd  * rights to redistribute these changes.
 1.2       cgd  */
 1.5       cgd
1.10     lukem #include <sys/cdefs.h>
1.16       dsl __KERNEL_RCSID(0, "$NetBSD: mcclock_pad32.c,v 1.16 2009/03/14 21:04:19 dsl Exp $");
 1.9  jonathan
 1.9  jonathan
 1.9  jonathan /*
 1.9  jonathan  * mc1461818 (or compatible) clock chip driver,  for machines where each
1.12     perry  * byte-wide mcclock chip register is  mapped
 1.9  jonathan  * into the low-order byte of a little-endian 32-bit word.
1.12     perry  *
 1.9  jonathan  *  DECstation 2100/3100
 1.9  jonathan  *  DECstation 5100
 1.9  jonathan  *  DECstation 5000/200 baseboard
 1.9  jonathan  *  IOCTL asic machines (Alpha  3000 series, Decstation 5000 series)
 1.9  jonathan  *
 1.9  jonathan  * bus-specific frontends should just declare an attach and match
1.12     perry  * entry, and set up a initializea switch to call the functions below.
 1.9  jonathan  */
 1.1       cgd
 1.1       cgd #include <sys/param.h>
 1.1       cgd #include <sys/kernel.h>
 1.1       cgd #include <sys/systm.h>
 1.1       cgd #include <sys/device.h>
1.14     joerg #include <dev/clock_subr.h>
 1.1       cgd
 1.9  jonathan #include <machine/autoconf.h>
 1.7  jonathan #include <dev/dec/clockvar.h>
 1.7  jonathan #include <dev/dec/mcclockvar.h>
 1.1       cgd #include <dev/ic/mc146818reg.h>
 1.1       cgd
 1.9  jonathan #include <dev/dec/mcclock_pad32.h>
 1.1       cgd
 1.1       cgd
1.11     perry void	mcclock_pad32_write(struct mcclock_softc *, u_int, u_int);
1.11     perry u_int	mcclock_pad32_read(struct mcclock_softc *, u_int);
 1.1       cgd
 1.9  jonathan const struct mcclock_busfns mcclock_pad32_busfns = {
 1.9  jonathan 	mcclock_pad32_write, mcclock_pad32_read,
 1.1       cgd };
 1.1       cgd
 1.1       cgd void
1.16       dsl mcclock_pad32_write(struct mcclock_softc *dev, u_int reg, u_int datum)
 1.1       cgd {
 1.9  jonathan 	struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev;
 1.1       cgd
 1.1       cgd 	sc->sc_dp[reg].datum = datum;
 1.1       cgd }
 1.1       cgd
 1.1       cgd u_int
1.15       dsl mcclock_pad32_read(struct mcclock_softc *dev, u_int reg)
 1.1       cgd {
 1.9  jonathan 	struct mcclock_pad32_softc *sc = (struct mcclock_pad32_softc *)dev;
 1.1       cgd
 1.1       cgd 	return (sc->sc_dp[reg].datum);
 1.1       cgd }