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125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: mcclock_tlsb.c,v 1.8 1998/05/13 02:50:29 thorpej Exp $ */
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/*
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* Copyright (c) 1997, 2000 by Matthew Jacob
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* NASA AMES Research Center.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/clockvar.h>
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#include <dev/dec/mcclockvar.h>
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#include <alpha/tlsb/gbusvar.h>
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#include <alpha/tlsb/tlsbreg.h> /* XXX */
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#include <dev/dec/mc146818reg.h>
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#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
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/*
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* Registers are 64 bytes apart (and 1 byte wide)
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*/
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#define REGSHIFT 6
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struct mcclock_tlsb_softc {
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unsigned long regbase;
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};
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static int mcclock_tlsb_probe(device_t dev);
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static int mcclock_tlsb_attach(device_t dev);
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static void mcclock_tlsb_write(device_t, u_int, u_int);
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static u_int mcclock_tlsb_read(device_t, u_int);
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static device_method_t mcclock_tlsb_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, mcclock_tlsb_probe),
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DEVMETHOD(device_attach, mcclock_tlsb_attach),
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/* mcclock interface */
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DEVMETHOD(mcclock_write, mcclock_tlsb_write),
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DEVMETHOD(mcclock_read, mcclock_tlsb_read),
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/* clock interface */
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DEVMETHOD(clock_init, mcclock_init),
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DEVMETHOD(clock_get, mcclock_get),
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DEVMETHOD(clock_set, mcclock_set),
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DEVMETHOD(clock_getsecs, mcclock_getsecs),
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{ 0, 0 }
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};
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static driver_t mcclock_tlsb_driver = {
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"mcclock", mcclock_tlsb_methods, sizeof(struct mcclock_tlsb_softc),
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};
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static devclass_t mcclock_devclass;
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int
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mcclock_tlsb_probe(device_t dev)
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{
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device_set_desc(dev, "MC146818A real time clock");
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return 0;
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}
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int
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mcclock_tlsb_attach(device_t dev)
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{
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struct mcclock_tlsb_softc *sc = device_get_softc(dev);
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/* XXX Should be bus.h'd, so we can accomodate the kn7aa. */
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sc->regbase = TLSB_GBUS_BASE + gbus_get_offset(dev);
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mcclock_attach(dev);
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return 0;
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}
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static void
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mcclock_tlsb_write(device_t dev, u_int reg, u_int val)
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{
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struct mcclock_tlsb_softc *sc = device_get_softc(dev);
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unsigned char *ptr = (unsigned char *)
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KV(sc->regbase + (reg << REGSHIFT));
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*ptr = val;
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}
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static u_int
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mcclock_tlsb_read(device_t dev, u_int reg)
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{
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struct mcclock_tlsb_softc *sc = device_get_softc(dev);
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unsigned char *ptr = (unsigned char *)
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KV(sc->regbase + (reg << REGSHIFT));
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return *ptr;
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}
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DRIVER_MODULE(mcclock, gbus, mcclock_tlsb_driver, mcclock_devclass, 0, 0);
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