211 lines
6.9 KiB
C
211 lines
6.9 KiB
C
/* $NetBSD: timer_isa.c,v 1.7 2003/08/07 16:26:50 agc Exp $ */
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/* $OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $ */
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/* NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. 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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* the Systems Programming Group of the University of Utah Computer
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* Science Department and Ralph Campbell.
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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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* from: Utah Hdr: clock.c 1.18 91/01/21
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*
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* @(#)clock.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Copyright (c) 1988 University of Utah.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department and Ralph Campbell.
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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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* from: Utah Hdr: clock.c 1.18 91/01/21
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*
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* @(#)clock.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: timer_isa.c,v 1.7 2003/08/07 16:26:50 agc Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.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/isa/isareg.h>
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#include <dev/ic/i8253reg.h>
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#include <arc/arc/timervar.h>
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#include <arc/isa/timer_isavar.h>
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#define TIMER_IOSIZE 4
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#define TIMER_IRQ 0
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struct timer_isa_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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/* Definition of the driver for autoconfig. */
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int timer_isa_match __P((struct device *, struct cfdata *, void *));
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void timer_isa_attach __P((struct device *, struct device *, void *));
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CFATTACH_DECL(timer_isa, sizeof(struct timer_isa_softc),
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timer_isa_match, timer_isa_attach, NULL, NULL);
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/* ISA timer access code */
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void timer_isa_init __P((struct device *));
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struct timerfns timerfns_isa = {
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timer_isa_init
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};
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int timer_isa_conf = 0;
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int
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timer_isa_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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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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(ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT &&
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ia->ia_io[0].ir_addr != IO_TIMER1))
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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 != ISACF_IOMEM_DEFAULT))
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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 != ISACF_IRQ_DEFAULT &&
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ia->ia_irq[0].ir_irq != TIMER_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 != ISACF_DRQ_DEFAULT))
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return (0);
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if (!timer_isa_conf)
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return (0);
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if (bus_space_map(ia->ia_iot, IO_TIMER1, TIMER_IOSIZE, 0, &ioh))
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return (0);
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bus_space_unmap(ia->ia_iot, ioh, TIMER_IOSIZE);
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ia->ia_nio = 1;
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ia->ia_io[0].ir_addr = IO_TIMER1;
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ia->ia_io[0].ir_size = TIMER_IOSIZE;
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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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timer_isa_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct timer_isa_softc *sc = (struct timer_isa_softc *)self;
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struct isa_attach_args *ia = aux;
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void *ih;
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printf("\n");
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sc->sc_iot = ia->ia_iot;
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if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr,
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ia->ia_io[0].ir_size, 0, &sc->sc_ioh))
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panic("timer_isa_attach: couldn't map clock I/O space");
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ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, IST_PULSE,
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IPL_CLOCK, (int (*)(void *))hardclock,
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NULL /* clockframe is hardcoded */);
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if (ih == NULL)
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printf("%s: can't establish interrupt\n", sc->sc_dev.dv_xname);
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timerattach(&sc->sc_dev, &timerfns_isa);
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}
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void
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timer_isa_init(self)
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struct device *self;
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{
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struct timer_isa_softc *sc = (struct timer_isa_softc *)self;
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE,
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TIMER_SEL0 | TIMER_16BIT | TIMER_RATEGEN);
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR0,
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TIMER_DIV(hz) % 256);
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR0,
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TIMER_DIV(hz) / 256);
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}
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