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142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/* $NetBSD: mcclock_frodo.c,v 1.1 2014/04/19 05:37:54 tsutsui Exp $ */
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/*-
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* Copyright (c) 2014 Izumi Tsutsui. 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, 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mcclock_frodo.c,v 1.1 2014/04/19 05:37:54 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <machine/cpu.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/mc146818reg.h>
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#include <dev/ic/mc146818var.h>
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#include <hp300/dev/frodoreg.h>
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#include <hp300/dev/frodovar.h>
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#include "ioconf.h"
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static int mcclock_frodo_probe(device_t, cfdata_t, void *);
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static void mcclock_frodo_attach(device_t, device_t, void *);
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static u_int mcclock_frodo_read(struct mc146818_softc *, u_int);
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static void mcclock_frodo_write(struct mc146818_softc *, u_int, u_int);
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CFATTACH_DECL_NEW(mcclock_frodo, sizeof(struct mc146818_softc),
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mcclock_frodo_probe, mcclock_frodo_attach, NULL, NULL);
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#define MCCLOCK_FRODO_NPORTS 2
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static int
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mcclock_frodo_probe(device_t parent, cfdata_t cf, void *aux)
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{
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struct frodo_attach_args *fa = aux;
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/* only 425e has a valid mcclock */
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if (machineid != HP_425 || mmuid != MMUID_425_E)
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return 0;
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if (strcmp(fa->fa_name, mcclock_cd.cd_name) != 0)
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return 0;
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if (fa->fa_offset != FRODO_CALENDAR)
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return 0;
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return 1;
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}
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static void
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mcclock_frodo_attach(device_t parent, device_t self, void *aux)
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{
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struct mc146818_softc *sc = device_private(self);
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struct frodo_attach_args *fa = aux;
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sc->sc_dev = self;
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sc->sc_bst = fa->fa_bst;
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if (bus_space_map(sc->sc_bst, fa->fa_base + fa->fa_offset,
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MCCLOCK_FRODO_NPORTS << 2, 0, &sc->sc_bsh) != 0) {
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aprint_error(": can't map register\n");
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return;
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}
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sc->sc_year0 = 1900;
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sc->sc_mcread = mcclock_frodo_read;
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sc->sc_mcwrite = mcclock_frodo_write;
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sc->sc_flag = 0;
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mc146818_attach(sc);
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aprint_normal("\n");
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/* XXX: not sure which mode (BINARY or BCD) is used on HP-UX */
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mcclock_frodo_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
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/* make sure to start the 32.768kHz OSC */
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mcclock_frodo_write(sc, MC_REGA,
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(mcclock_frodo_read(sc, MC_REGA) & ~MC_REGA_DVMASK) |
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MC_BASE_32_KHz);
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}
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/*
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* mc146818 calendar chip in the frodo utility chip is can be accessed
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* via register port at offset 0x80 and data port at offset 0x84.
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*
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* Note 4 byte offset stride is handled by frodo bus_space(9) layer,
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* so bus_space_read(9) and bus_space_write(9) takes 0 or 1 as offset
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* to access these registers.
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*/
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static void
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mcclock_frodo_write(struct mc146818_softc *sc, u_int reg, u_int datum)
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{
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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iot = sc->sc_bst;
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ioh = sc->sc_bsh;
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bus_space_write_1(iot, ioh, 0, reg);
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bus_space_write_1(iot, ioh, 1, datum);
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}
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static u_int
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mcclock_frodo_read(struct mc146818_softc *sc, u_int reg)
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{
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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u_int datum;
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iot = sc->sc_bst;
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ioh = sc->sc_bsh;
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bus_space_write_1(iot, ioh, 0, reg);
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datum = bus_space_read_1(iot, ioh, 1);
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return datum;
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}
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