NetBSD-5.0.2/sys/arch/arm/gemini/obio_timer.c
/* $NetBSD: obio_timer.c,v 1.1 2008/10/24 04:23:18 matt Exp $ */
/* adapted from:
* NetBSD: obio_mputmr.c,v 1.3 2008/08/27 11:03:10 matt Exp
*/
/*
* Based on omap_mputmr.c
* Based on i80321_timer.c and arch/arm/sa11x0/sa11x0_ost.c
*
* Copyright (c) 1997 Mark Brinicombe.
* Copyright (c) 1997 Causality Limited.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by IWAMOTO Toshihiro and Ichiro FUKUHARA.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*
* Copyright (c) 2007 Microsoft
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Microsoft
*
* 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 OR CONTRIBUTERS 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: obio_timer.c,v 1.1 2008/10/24 04:23:18 matt Exp $");
#include "opt_cpuoptions.h"
#include "opt_gemini.h"
#include "locators.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/device.h>
#include <dev/clock_subr.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <arm/gemini/gemini_reg.h>
#include <arm/gemini/gemini_obiovar.h>
#include <arm/gemini/gemini_timervar.h>
#ifndef GEMINI_TIMER_CLOCK_FREQ
# error Specify the timer frequency in Hz with the GEMINI_TIMER_CLOCK_FREQ option.
#endif
static int obiotimer_match(device_t, struct cfdata *, void *);
static void obiotimer_attach(device_t, device_t, void *);
struct geminitmr_softc xsc;
typedef struct {
uint timerno;
bus_addr_t addr;
uint intr;
} obiotimer_instance_t;
/* XXX
* this table can be used to match the GP Timers
* until we use config(8) locators to distinguish between
* gemini "sub-timers".
*/
#define GPT_ENTRY(n, i) { \
.timerno = (n), \
.addr = GEMINI_TIMER_BASE, \
.intr = i, \
}
static const obiotimer_instance_t obiotimer_instance_tab[] = {
GPT_ENTRY(1, 14),
GPT_ENTRY(2, 15),
GPT_ENTRY(3, 16),
};
#undef GPT_ENTRY
#define GPTIMER_INSTANCE_CNT __arraycount(obiotimer_instance_tab)
static const obiotimer_instance_t *
obiotimer_lookup(struct obio_attach_args *);
static void obiotimer_enable(struct geminitmr_softc *,
struct obio_attach_args *,
const obiotimer_instance_t *);
static int obiotimer_match(device_t, struct cfdata *, void *);
static void obiotimer_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(obiotimer, sizeof(struct geminitmr_softc),
obiotimer_match, obiotimer_attach, NULL, NULL);
static int
obiotimer_match(device_t parent, struct cfdata *match, void *aux)
{
struct obio_attach_args *obio = aux;
if ((obio->obio_addr == IICCF_ADDR_DEFAULT)
|| (obio->obio_intr == OBIOCF_INTR_DEFAULT))
panic("geminitmr must have addr and intr specified in config.");
if (obiotimer_lookup(obio) == NULL)
return 0;
return 1;
}
void
obiotimer_attach(device_t parent, device_t self, void *aux)
{
struct geminitmr_softc *sc = device_private(self);
struct obio_attach_args *obio = aux;
const obiotimer_instance_t *ip;
static int once=1;
ip = obiotimer_lookup(obio);
if (ip == NULL)
panic("%s: bad lookup", device_xname(self));
/* should not fail since we already matched */
sc->sc_timerno = ip->timerno;
sc->sc_iot = obio->obio_iot;
sc->sc_intr = obio->obio_intr;
sc->sc_addr = obio->obio_addr;
sc->sc_size = (obio->obio_size == IICCF_SIZE_DEFAULT)
? (GEMINI_TIMER_INTRMASK + 4)
: obio->obio_size;
if (bus_space_map(sc->sc_iot, sc->sc_addr, sc->sc_size, 0, &sc->sc_ioh))
panic("%s: Cannot map registers", device_xname(self));
obiotimer_enable(sc, obio, obiotimer_lookup(obio));
aprint_normal("\n");
aprint_naive("\n");
if (once) {
once = 0;
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
GEMINI_TIMER_TMCR, 0);
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
GEMINI_TIMER_INTRMASK, (uint32_t)~TIMER_INTRMASK_Resv);
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
GEMINI_TIMER_INTRSTATE, 0);
}
switch (sc->sc_timerno) {
case 1:
/*
* timer #1 is the system clock
* it gets started later
*/
clock_sc = sc;
break;
case 2:
/*
* timer #2 is the stat clock
* it gets started later
*/
profhz = stathz = STATHZ;
stat_sc = sc;
break;
case 3:
/*
* Timer #3 is used for microtime reference clock and for delay()
* autoloading, non-interrupting, just wraps around as an unsigned int.
* we start it now to make delay() available
*/
ref_sc = sc;
gemini_microtime_init();
break;
default:
panic("bad gemini timer number %d\n", sc->sc_timerno);
break;
}
}
static const obiotimer_instance_t *
obiotimer_lookup(struct obio_attach_args *obio)
{
const obiotimer_instance_t *ip;
uint i;
for (i = 0, ip = obiotimer_instance_tab;
i < GPTIMER_INSTANCE_CNT; i++, ip++) {
if (ip->addr == obio->obio_addr && ip->intr == obio->obio_intr)
return ip;
}
return NULL;
}
void
obiotimer_enable(
struct geminitmr_softc *sc,
struct obio_attach_args *obio,
const obiotimer_instance_t *ip)
{
/* nothing to do */
}