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/* $NetBSD: mcclock_frodo.c,v 1.2 2023/01/15 06:19:45 tsutsui Exp $ */
/*-
* Copyright (c) 2014 Izumi Tsutsui. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mcclock_frodo.c,v 1.2 2023/01/15 06:19:45 tsutsui Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/bus.h>
#include <machine/cpu.h>
#include <dev/clock_subr.h>
#include <dev/ic/mc146818reg.h>
#include <dev/ic/mc146818var.h>
#include <hp300/dev/frodoreg.h>
#include <hp300/dev/frodovar.h>
#include "ioconf.h"
static int mcclock_frodo_probe(device_t, cfdata_t, void *);
static void mcclock_frodo_attach(device_t, device_t, void *);
static u_int mcclock_frodo_read(struct mc146818_softc *, u_int);
static void mcclock_frodo_write(struct mc146818_softc *, u_int, u_int);
CFATTACH_DECL_NEW(mcclock_frodo, sizeof(struct mc146818_softc),
mcclock_frodo_probe, mcclock_frodo_attach, NULL, NULL);
#define MCCLOCK_FRODO_NPORTS 2
static int
mcclock_frodo_probe(device_t parent, cfdata_t cf, void *aux)
{
struct frodo_attach_args *fa = aux;
/* only 425e has a valid mcclock */
if (machineid != HP_425 || mmuid != MMUID_425_E)
return 0;
if (strcmp(fa->fa_name, mcclock_cd.cd_name) != 0)
return 0;
if (fa->fa_offset != FRODO_CALENDAR)
return 0;
return 1;
}
static void
mcclock_frodo_attach(device_t parent, device_t self, void *aux)
{
struct mc146818_softc *sc = device_private(self);
struct frodo_attach_args *fa = aux;
sc->sc_dev = self;
sc->sc_bst = fa->fa_bst;
if (bus_space_map(sc->sc_bst, fa->fa_base + fa->fa_offset,
MCCLOCK_FRODO_NPORTS << 2, 0, &sc->sc_bsh) != 0) {
aprint_error(": can't map register\n");
return;
}
sc->sc_year0 = 1900;
sc->sc_mcread = mcclock_frodo_read;
sc->sc_mcwrite = mcclock_frodo_write;
sc->sc_flag = 0;
mc146818_attach(sc);
aprint_normal("\n");
/* XXX: not sure which mode (BINARY or BCD) is used on HP-UX */
mcclock_frodo_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
/* make sure to start the 32.768kHz OSC */
mcclock_frodo_write(sc, MC_REGA,
(mcclock_frodo_read(sc, MC_REGA) & ~MC_REGA_DVMASK) |
MC_BASE_32_KHz);
}
/*
* mc146818 calendar chip in the frodo utility chip is can be accessed
* via register port at offset 0x80 and data port at offset 0x84.
*
* Note 4 byte offset stride is handled by frodo bus_space(9) layer,
* so bus_space_read(9) and bus_space_write(9) takes 0 or 1 as offset
* to access these registers.
*/
static void
mcclock_frodo_write(struct mc146818_softc *sc, u_int reg, u_int datum)
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
iot = sc->sc_bst;
ioh = sc->sc_bsh;
bus_space_write_1(iot, ioh, 0, reg);
bus_space_write_1(iot, ioh, 1, datum);
}
static u_int
mcclock_frodo_read(struct mc146818_softc *sc, u_int reg)
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
u_int datum;
iot = sc->sc_bst;
ioh = sc->sc_bsh;
bus_space_write_1(iot, ioh, 0, reg);
datum = bus_space_read_1(iot, ioh, 1);
return datum;
}
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