304 lines
9.9 KiB
C
304 lines
9.9 KiB
C
/* $NetBSD: obio_timer.c,v 1.4 2008/12/04 00:38:07 cliff Exp $ */
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/* adapted from:
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* NetBSD: obio_mputmr.c,v 1.3 2008/08/27 11:03:10 matt Exp
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*/
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/*
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* Based on omap_mputmr.c
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* Based on i80321_timer.c and arch/arm/sa11x0/sa11x0_ost.c
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*
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* Copyright (c) 1997 Mark Brinicombe.
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* Copyright (c) 1997 Causality Limited.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by IWAMOTO Toshihiro and Ichiro FUKUHARA.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Copyright (c) 2007 Microsoft
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* 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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* 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 Microsoft
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTERS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: obio_timer.c,v 1.4 2008/12/04 00:38:07 cliff Exp $");
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#include "opt_cpuoptions.h"
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#include "opt_gemini.h"
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#include "locators.h"
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#include <sys/types.h>
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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/time.h>
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#include <sys/device.h>
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#include <dev/clock_subr.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <arm/gemini/gemini_reg.h>
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#include <arm/gemini/gemini_obiovar.h>
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#include <arm/gemini/gemini_timervar.h>
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#if STATHZ != HZ
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# error system clock HZ and stat clock STATHZ must be same
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#endif
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#ifndef GEMINI_TIMER_CLOCK_FREQ
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# error Specify the timer frequency in Hz with option GEMINI_TIMER_CLOCK_FREQ
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#endif
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static int obiotimer_match(device_t, struct cfdata *, void *);
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static void obiotimer_attach(device_t, device_t, void *);
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struct geminitmr_softc xsc;
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typedef struct {
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uint timerno;
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bus_addr_t addr;
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uint intr;
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} obiotimer_instance_t;
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/* XXX
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* this table can be used to match the GP Timers
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* until we use config(8) locators to distinguish between
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* gemini "sub-timers".
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*/
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#define GPT_ENTRY(n, i) { \
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.timerno = (n), \
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.addr = GEMINI_TIMER_BASE, \
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.intr = i, \
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}
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static const obiotimer_instance_t obiotimer_instance_tab[] = {
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GPT_ENTRY(1, 14),
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GPT_ENTRY(2, 15),
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GPT_ENTRY(3, 16),
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};
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#undef GPT_ENTRY
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#define GPTIMER_INSTANCE_CNT __arraycount(obiotimer_instance_tab)
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static const obiotimer_instance_t *
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obiotimer_lookup(struct obio_attach_args *);
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static void obiotimer_enable(struct geminitmr_softc *,
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struct obio_attach_args *,
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const obiotimer_instance_t *);
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static int obiotimer_match(device_t, struct cfdata *, void *);
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static void obiotimer_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(obiotimer, sizeof(struct geminitmr_softc),
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obiotimer_match, obiotimer_attach, NULL, NULL);
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static int
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obiotimer_match(device_t parent, struct cfdata *match, void *aux)
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{
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struct obio_attach_args *obio = aux;
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if ((obio->obio_addr == OBIOCF_ADDR_DEFAULT)
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|| (obio->obio_intr == OBIOCF_INTR_DEFAULT))
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panic("geminitmr must have addr and intr specified in config.");
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if (obiotimer_lookup(obio) == NULL)
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return 0;
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return 1;
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}
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void
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obiotimer_attach(device_t parent, device_t self, void *aux)
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{
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struct geminitmr_softc *sc = device_private(self);
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struct obio_attach_args *obio = aux;
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const obiotimer_instance_t *ip;
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#ifndef GEMINI_SLAVE
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static int once=1;
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#endif
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ip = obiotimer_lookup(obio);
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if (ip == NULL)
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panic("%s: bad lookup", device_xname(self));
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/* should not fail since we already matched */
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sc->sc_timerno = ip->timerno;
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sc->sc_iot = obio->obio_iot;
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sc->sc_intr = obio->obio_intr;
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sc->sc_addr = obio->obio_addr;
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sc->sc_size = (obio->obio_size == OBIOCF_SIZE_DEFAULT)
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? (GEMINI_TIMER_INTRMASK + 4)
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: obio->obio_size;
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if (bus_space_map(sc->sc_iot, sc->sc_addr, sc->sc_size, 0, &sc->sc_ioh))
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panic("%s: Cannot map registers", device_xname(self));
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obiotimer_enable(sc, obio, obiotimer_lookup(obio));
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aprint_normal("\n");
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aprint_naive("\n");
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#ifndef GEMINI_SLAVE
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if (once) {
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once = 0;
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bus_space_write_4(sc->sc_iot, sc->sc_ioh,
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GEMINI_TIMER_TMCR, 0);
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bus_space_write_4(sc->sc_iot, sc->sc_ioh,
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GEMINI_TIMER_INTRMASK, (uint32_t)~TIMER_INTRMASK_Resv);
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bus_space_write_4(sc->sc_iot, sc->sc_ioh,
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GEMINI_TIMER_INTRSTATE, 0);
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}
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#endif
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switch (sc->sc_timerno) {
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case 1:
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#ifndef GEMINI_SLAVE
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/*
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* timer #1 is the combined system clock and stat clock
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* for the Master or Single Gemini CPU
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* it gets started later
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*/
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profhz = stathz = hz;
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stat_sc = clock_sc = sc;
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#endif
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break;
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case 2:
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#ifdef GEMINI_SLAVE
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/*
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* timer #2 is the combined system clock and stat clock
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* for the Slave Gemini CPU
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* it gets started later
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*/
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profhz = stathz = hz;
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stat_sc = clock_sc = sc;
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#endif
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break;
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case 3:
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/*
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* Timer #3 is used for microtime reference clock and delay()
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* autoloading, non-interrupting, just wraps around
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* we start it now to make delay() available
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*/
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ref_sc = sc;
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#ifndef GEMINI_SLAVE
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gemini_microtime_init();
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#endif
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break;
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default:
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panic("bad gemini timer number %d\n", sc->sc_timerno);
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break;
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}
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}
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static const obiotimer_instance_t *
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obiotimer_lookup(struct obio_attach_args *obio)
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{
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const obiotimer_instance_t *ip;
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uint i;
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for (i = 0, ip = obiotimer_instance_tab;
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i < GPTIMER_INSTANCE_CNT; i++, ip++) {
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if (ip->addr == obio->obio_addr && ip->intr == obio->obio_intr)
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return ip;
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}
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return NULL;
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}
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void
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obiotimer_enable(
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struct geminitmr_softc *sc,
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struct obio_attach_args *obio,
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const obiotimer_instance_t *ip)
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{
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/* nothing to do */
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}
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