NetBSD/sys/arch/alpha/tlsb/mcclock_tlsb.c

123 lines
3.8 KiB
C

/* $NetBSD: mcclock_tlsb.c,v 1.7 1998/01/12 10:21:24 thorpej Exp $ */
/*
* Copyright (c) 1997 by Matthew Jacob
* NASA AMES Research Center.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: mcclock_tlsb.c,v 1.7 1998/01/12 10:21:24 thorpej Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <dev/dec/clockvar.h>
#include <dev/dec/mcclockvar.h>
#include <alpha/tlsb/tlsbreg.h>
#include <dev/ic/mc146818reg.h>
#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
/*
* Registers are 64 bytes apart (and 1 byte wide)
*/
#define REGSHIFT 6
struct mcclock_tlsb_softc {
struct mcclock_softc sc_mcclock;
unsigned long regbase;
};
int mcclock_tlsb_match __P((struct device *, struct cfdata *, void *));
void mcclock_tlsb_attach __P((struct device *, struct device *, void *));
struct cfattach mcclock_tlsb_ca = {
sizeof (struct mcclock_tlsb_softc),
mcclock_tlsb_match,
mcclock_tlsb_attach,
};
extern struct cfdriver mcclock_cd;
static void mcclock_tlsb_write __P((struct mcclock_softc *, u_int, u_int));
static u_int mcclock_tlsb_read __P((struct mcclock_softc *, u_int));
const struct mcclock_busfns mcclock_tlsb_busfns = {
mcclock_tlsb_write, mcclock_tlsb_read,
};
int
mcclock_tlsb_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct confargs *ca = aux;
if (strcmp(ca->ca_name, mcclock_cd.cd_name))
return (0);
return (1);
}
void
mcclock_tlsb_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)self;
struct confargs *ca = aux;
sc->regbase = TLSB_GBUS_BASE + ca->ca_offset;
mcclock_attach(&sc->sc_mcclock, &mcclock_tlsb_busfns);
}
static void
mcclock_tlsb_write(mcsc, reg, val)
struct mcclock_softc *mcsc;
u_int reg, val;
{
struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc;
unsigned char *ptr = (unsigned char *)
KV(sc->regbase + (reg << REGSHIFT));
*ptr = val;
}
static u_int
mcclock_tlsb_read(mcsc, reg)
struct mcclock_softc *mcsc;
u_int reg;
{
struct mcclock_tlsb_softc *sc = (struct mcclock_tlsb_softc *)mcsc;
unsigned char *ptr = (unsigned char *)
KV(sc->regbase + (reg << REGSHIFT));
return *ptr;
}