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/* $FreeBSD$ */
/* $NetBSD: mcclock_ioasic.c,v 1.8 1997/09/02 13:20:14 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/clockvar.h>
#include <dev/dec/mcclockvar.h>
#include <alpha/tlsb/gbusvar.h>
#include <alpha/tc/tcreg.h>
#include <alpha/tc/tcvar.h>
#include <alpha/tc/tcdevs.h>
#include <alpha/tc/ioasicreg.h>
#include <alpha/tc/ioasicvar.h>
#include <dev/dec/mc146818reg.h>
struct mcclock_ioasic_clockdatum {
u_char datum;
char pad[3];
};
#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
/*
* Registers are 64 bytes apart (and 1 byte wide)
*/
#define REGSHIFT 6
struct mcclock_ioasic_softc {
unsigned long regbase;
struct mcclock_ioasic_clockdatum *sc_dp;
};
static int mcclock_ioasic_probe(device_t dev);
static int mcclock_ioasic_attach(device_t dev);
static void mcclock_ioasic_write(device_t, u_int, u_int);
static u_int mcclock_ioasic_read(device_t, u_int);
static device_method_t mcclock_ioasic_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mcclock_ioasic_probe),
DEVMETHOD(device_attach, mcclock_ioasic_attach),
/* mcclock interface */
DEVMETHOD(mcclock_write, mcclock_ioasic_write),
DEVMETHOD(mcclock_read, mcclock_ioasic_read),
/* clock interface */
DEVMETHOD(clock_init, mcclock_init),
DEVMETHOD(clock_get, mcclock_get),
DEVMETHOD(clock_set, mcclock_set),
{ 0, 0 }
};
static driver_t mcclock_ioasic_driver = {
"mcclock",
mcclock_ioasic_methods,
sizeof(struct mcclock_ioasic_softc),
};
static devclass_t mcclock_devclass;
int
mcclock_ioasic_probe(device_t dev)
{
device_set_desc(dev, "MC146818A real time clock");
return 0;
}
static int
mcclock_ioasic_attach(device_t dev)
{
struct mcclock_ioasic_softc *sc = device_get_softc(dev);
struct ioasic_dev *ioasic = device_get_ivars(dev);
sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasic->iada_addr;
mcclock_attach(dev);
return 0;
}
void
mcclock_ioasic_write(device_t dev, u_int reg, u_int datum)
{
struct mcclock_ioasic_softc *sc = device_get_softc(dev);
sc->sc_dp[reg].datum = datum;
}
u_int
mcclock_ioasic_read(device_t dev, u_int reg)
{
struct mcclock_ioasic_softc *sc = device_get_softc(dev);
return (sc->sc_dp[reg].datum);
}
DRIVER_MODULE(mcclock, ioasic, mcclock_ioasic_driver, mcclock_devclass, 0, 0);
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