NetBSD-5.0.2/sys/arch/arc/isa/mcclock_isa.c
/* $NetBSD: mcclock_isa.c,v 1.13 2008/03/29 05:42:45 tsutsui 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) 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. 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
*/
/*
* Copyright (c) 1988 University of Utah.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.13 2008/03/29 05:42:45 tsutsui Exp $");
#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/clock_subr.h>
#include <dev/ic/mc146818reg.h>
#include <dev/ic/mc146818var.h>
#include <arc/isa/mcclock_isavar.h>
int mcclock_isa_match(device_t, cfdata_t, void *);
void mcclock_isa_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
/* Deskstation clock access code */
static u_int mc_isa_read(struct mc146818_softc *, u_int);
static void mc_isa_write(struct mc146818_softc *, u_int, u_int);
int mcclock_isa_conf = 0;
int
mcclock_isa_match(device_t parent, cfdata_t cf, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_handle_t ioh;
if (ia->ia_nio < 1 ||
(ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
ia->ia_io[0].ir_addr != 0x70))
return 0;
if (ia->ia_niomem > 0 &&
(ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM))
return 0;
if (ia->ia_nirq > 0 &&
(ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ))
return 0;
if (ia->ia_ndrq > 0 &&
(ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ))
return 0;
if (!mcclock_isa_conf)
return 0;
if (bus_space_map(ia->ia_iot, 0x70, 0x02, 0, &ioh))
return 0;
bus_space_unmap(ia->ia_iot, ioh, 0x02);
ia->ia_nio = 1;
ia->ia_io[0].ir_addr = 0x70;
ia->ia_io[0].ir_size = 0x02;
ia->ia_niomem = 0;
ia->ia_nirq = 0;
ia->ia_ndrq = 0;
return 1;
}
void
mcclock_isa_attach(device_t parent, device_t self, void *aux)
{
struct mc146818_softc *sc = device_private(self);
struct isa_attach_args *ia = aux;
sc->sc_dev = self;
sc->sc_bst = ia->ia_iot;
if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr,
ia->ia_io[0].ir_size, 0, &sc->sc_bsh))
panic("mcclock_isa_attach: couldn't map clock I/O space");
sc->sc_year0 = 1980;
sc->sc_mcread = mc_isa_read;
sc->sc_mcwrite = mc_isa_write;
mc146818_attach(sc);
aprint_normal("\n");
/* Turn interrupts off, just in case. */
mc_isa_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
}
u_int
mc_isa_read(struct mc146818_softc *sc, u_int reg)
{
bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1);
}
void
mc_isa_write(struct mc146818_softc *sc, u_int reg, u_int datum)
{
bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum);
}