130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* $Id: mcclock_ioasic.c,v 1.1 1998/08/20 08:27:10 dfr Exp $ */
|
|
/* $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);
|