118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/* $NetBSD: mcclock_tlsb.c,v 1.2 1997/03/12 21:10:54 cgd 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/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/autoconf.h>
|
|
|
|
#include <alpha/alpha/clockvar.h>
|
|
#include <alpha/alpha/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,
|
|
};
|
|
|
|
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,
|
|
};
|
|
extern struct cfdriver mcclock_cd;
|
|
|
|
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;
|
|
}
|