NetBSD/sys/arch/arc/isa/mcclock_isa.c

158 lines
4.7 KiB
C

/* $NetBSD: mcclock_isa.c,v 1.1 2001/06/13 15:02:13 soda Exp $ */
/* $OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $ */
/* NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
*
* 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, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: clock.c 1.18 91/01/21
*
* @(#)clock.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/ic/mc146818reg.h>
#include <arc/dev/mcclockvar.h>
#include <arc/isa/mcclock_isavar.h>
#define ARC_IO_RTCSIZE 2
int mcclock_isa_match __P((struct device *, struct cfdata *, void *));
void mcclock_isa_attach __P((struct device *, struct device *, void *));
struct cfattach mcclock_isa_ca = {
sizeof(struct mcclock_softc),
mcclock_isa_match, mcclock_isa_attach
};
/* Deskstation clock access code */
u_int mc_isa_read __P((struct mcclock_softc *, u_int));
void mc_isa_write __P((struct mcclock_softc *, u_int, u_int));
struct mcclock_busfns mcclock_isa_busfns = {
mc_isa_read, mc_isa_write
};
int mcclock_isa_conf = 0;
int
mcclock_isa_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct isa_attach_args *ia = aux;
bus_space_handle_t ioh;
bus_addr_t iobase = IO_RTC;
bus_size_t iosize = ARC_IO_RTCSIZE;
if (ia->ia_iobase != IOBASEUNK)
iobase = ia->ia_iobase;
#if 0 /* XXX isa.c */
if (ia->ia_iosize != 0)
iosize = ia->ia_iosize;
#endif
if (iobase != IO_RTC || iosize != ARC_IO_RTCSIZE ||
ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
return (0);
if (!mcclock_isa_conf)
return (0);
if (bus_space_map(ia->ia_iot, iobase, iosize, 0, &ioh))
return (0);
bus_space_unmap(ia->ia_iot, ioh, iosize);
ia->ia_iobase = iobase;
ia->ia_iosize = iosize;
return (1);
}
void
mcclock_isa_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct mcclock_softc *sc = (struct mcclock_softc *)self;
struct isa_attach_args *ia = aux;
sc->sc_iot = ia->ia_iot;
if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
&sc->sc_ioh))
panic("mcclock_isa_attach: couldn't map clock I/O space");
mcclock_attach(sc, &mcclock_isa_busfns, 80);
/* Turn interrupts off, just in case. */
mc146818_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
}
u_int
mc_isa_read(sc, reg)
struct mcclock_softc *sc;
u_int reg;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, reg);
return (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 1));
}
void
mc_isa_write(sc, reg, datum)
struct mcclock_softc *sc;
u_int reg, datum;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, reg);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, 1, datum);
}