NetBSD-5.0.2/sys/arch/arc/isa/timer_isa.c
/* $NetBSD: timer_isa.c,v 1.12 2008/07/05 08:46:25 tsutsui Exp $ */
/* $OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $ */
/* NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
*
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: clock.c 1.18 91/01/21
*
* @(#)clock.c 8.1 (Berkeley) 6/10/93
*/
/*
* Copyright (c) 1988 University of Utah.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: clock.c 1.18 91/01/21
*
* @(#)clock.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: timer_isa.c,v 1.12 2008/07/05 08:46:25 tsutsui Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/ic/i8253reg.h>
#include <arc/arc/timervar.h>
#include <arc/isa/timer_isavar.h>
#define TIMER_IOSIZE 4
#define TIMER_IRQ 0
struct timer_isa_softc {
device_t sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
/* Definition of the driver for autoconfig. */
static int timer_isa_match(device_t, cfdata_t, void *);
static void timer_isa_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(timer_isa, sizeof(struct timer_isa_softc),
timer_isa_match, timer_isa_attach, NULL, NULL);
/* ISA timer access code */
static void timer_isa_init(device_t);
struct timerfns timerfns_isa = {
timer_isa_init
};
int timer_isa_conf = 0;
static int
timer_isa_match(device_t parent, cfdata_t cf, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_handle_t ioh;
if (ia->ia_nio < 1 ||
(ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
ia->ia_io[0].ir_addr != IO_TIMER1))
return 0;
if (ia->ia_niomem > 0 &&
(ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM))
return 0;
if (ia->ia_nirq > 0 &&
(ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
ia->ia_irq[0].ir_irq != TIMER_IRQ))
return 0;
if (ia->ia_ndrq > 0 &&
(ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ))
return 0;
if (!timer_isa_conf)
return 0;
if (bus_space_map(ia->ia_iot, IO_TIMER1, TIMER_IOSIZE, 0, &ioh))
return 0;
bus_space_unmap(ia->ia_iot, ioh, TIMER_IOSIZE);
ia->ia_nio = 1;
ia->ia_io[0].ir_addr = IO_TIMER1;
ia->ia_io[0].ir_size = TIMER_IOSIZE;
ia->ia_niomem = 0;
ia->ia_nirq = 0;
ia->ia_ndrq = 0;
return 1;
}
static void
timer_isa_attach(device_t parent, device_t self, void *aux)
{
struct timer_isa_softc *sc = device_private(self);
struct isa_attach_args *ia = aux;
void *ih;
sc->sc_dev = self;
aprint_normal("\n");
sc->sc_iot = ia->ia_iot;
if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr,
ia->ia_io[0].ir_size, 0, &sc->sc_ioh))
panic("timer_isa_attach: couldn't map clock I/O space");
ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, IST_PULSE,
IPL_CLOCK, (int (*)(void *))hardclock,
NULL /* clockframe is hardcoded */);
if (ih == NULL)
aprint_error_dev(self, "can't establish interrupt\n");
timerattach(self, &timerfns_isa);
}
static void
timer_isa_init(device_t self)
{
struct timer_isa_softc *sc = device_private(self);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE,
TIMER_SEL0 | TIMER_16BIT | TIMER_RATEGEN);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR0,
TIMER_DIV(hz) % 256);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR0,
TIMER_DIV(hz) / 256);
}