247 lines
8.6 KiB
C
247 lines
8.6 KiB
C
/* $NetBSD: mcclock_isa.c,v 1.4 2008/03/29 05:42:45 tsutsui Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz and Don Ahn.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR 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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* @(#)clock.c 7.2 (Berkeley) 5/12/91
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*/
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/*-
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* Copyright (c) 1993, 1994 Charles M. Hannum.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz and Don Ahn.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR 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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* @(#)clock.c 7.2 (Berkeley) 5/12/91
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990,1989 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appears in all
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copies and that both the copyright notice and this permission notice
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appear in supporting documentation, and that the name of Intel
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not be used in advertising or publicity pertaining to distribution
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of the software without specific, written prior permission.
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INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
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IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
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CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
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NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.4 2008/03/29 05:42:45 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/time.h>
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#include <machine/bus.h>
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#include <dev/clock_subr.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/ic/mc146818reg.h>
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#include <dev/ic/mc146818var.h>
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/*
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* We only deal with the RTC portion of the mc146818 right now. Later
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* we might want to add support for the NVRAM portion, since it
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* appears that some systems use that.
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*/
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static int mcclock_isa_probe(device_t, cfdata_t, void *);
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static void mcclock_isa_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
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mcclock_isa_probe, mcclock_isa_attach, NULL, NULL);
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static unsigned
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mcclock_isa_read(struct mc146818_softc *sc, unsigned reg)
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{
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
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return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1);
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}
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static void
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mcclock_isa_write(struct mc146818_softc *sc, unsigned reg, unsigned datum)
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{
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum);
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}
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int
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mcclock_isa_probe(device_t parent, cfdata_t cf, void *aux)
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{
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struct isa_attach_args *ia = aux;
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bus_space_handle_t ioh;
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if (ia->ia_nio < 1)
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return 0;
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if (ISA_DIRECT_CONFIG(ia))
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return 0;
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if ((ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT) &&
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(ia->ia_io[0].ir_addr != IO_RTC))
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return 0;
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if (ia->ia_niomem > 0 &&
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(ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM))
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return 0;
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if (ia->ia_nirq > 0 &&
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(ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ))
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return 0;
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if (ia->ia_ndrq > 0 &&
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(ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ))
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return 0;
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if (bus_space_map(ia->ia_iot, IO_RTC, 2, 0, &ioh))
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return 0;
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bus_space_unmap(ia->ia_iot, ioh, 2);
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ia->ia_io[0].ir_addr = IO_RTC;
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ia->ia_io[0].ir_size = 2;
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ia->ia_nio = 1;
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ia->ia_niomem = 0;
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ia->ia_nirq = 0;
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ia->ia_ndrq = 0;
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return 1;
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}
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void
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mcclock_isa_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 isa_attach_args *ia = aux;
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sc->sc_dev = self;
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sc->sc_bst = ia->ia_iot;
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if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr,
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ia->ia_io[0].ir_size, 0, &sc->sc_bsh)) {
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aprint_error(": can't map registers!\n");
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return;
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}
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/*
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* Select a 32KHz crystal, periodic interrupt every 1024 Hz.
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* XXX: We disable periodic interrupts, so why set a rate?
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*/
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mcclock_isa_write(sc, MC_REGA, MC_BASE_32_KHz | MC_RATE_1024_Hz);
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/*
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* 24 Hour clock, no interrupts please.
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*/
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mcclock_isa_write(sc, MC_REGB, MC_REGB_24HR);
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sc->sc_year0 = 1900;
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sc->sc_flag = 0;
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sc->sc_mcread = mcclock_isa_read;
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sc->sc_mcwrite = mcclock_isa_write;
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#if 0
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/*
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* XXX: perhaps on some systems we should manage the century byte?
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* For now we don't worry about it. (Ugly MD code.)
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*/
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sc->sc_getcent = mcclock_isa_getcent;
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sc->sc_setcent = mcclock_isa_setcent;
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#endif
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mc146818_attach(sc);
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aprint_normal("\n");
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}
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