358 lines
8.8 KiB
C
358 lines
8.8 KiB
C
/* $NetBSD: sa11x0_ost.c,v 1.11 2003/07/15 00:24:51 lukem Exp $ */
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/bus.h>
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#include <sys/clock.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/frame.h>
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#include <machine/katelib.h>
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#include <arm/sa11x0/sa11x0_reg.h>
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#include <arm/sa11x0/sa11x0_var.h>
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#include <arm/sa11x0/sa11x0_ostreg.h>
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static int saost_probe(device_t);
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static int saost_attach(device_t);
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int gettick(void);
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static void clockintr(void *);
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#if 0
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static void statintr(void *);
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#endif
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void rtcinit(void);
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#if 0
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static struct mtx clock_lock;
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#endif
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struct saost_softc {
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device_t sc_dev;
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bus_addr_t sc_baseaddr;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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u_int32_t sc_clock_count;
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u_int32_t sc_statclock_count;
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u_int32_t sc_statclock_step;
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};
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static struct saost_softc *saost_sc = NULL;
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#define TIMER_FREQUENCY 3686400 /* 3.6864MHz */
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#define TICKS_PER_MICROSECOND (TIMER_FREQUENCY/1000000)
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#ifndef STATHZ
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#define STATHZ 64
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#endif
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static device_method_t saost_methods[] = {
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DEVMETHOD(device_probe, saost_probe),
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DEVMETHOD(device_attach, saost_attach),
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{0, 0},
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};
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static driver_t saost_driver = {
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"saost",
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saost_methods,
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sizeof(struct saost_softc),
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};
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static devclass_t saost_devclass;
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DRIVER_MODULE(saost, saip, saost_driver, saost_devclass, 0, 0);
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static int
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saost_probe(device_t dev)
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{
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return (0);
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}
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static int
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saost_attach(device_t dev)
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{
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struct saost_softc *sc = device_get_softc(dev);
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struct sa11x0_softc *sa = device_get_softc(device_get_parent(dev));
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sc->sc_dev = dev;
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sc->sc_iot = sa->sc_iot;
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sc->sc_baseaddr = 0x90000000;
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saost_sc = sc;
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if(bus_space_map(sa->sc_iot, sc->sc_baseaddr, 8, 0,
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&sc->sc_ioh))
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panic("%s: Cannot map registers", device_get_name(dev));
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/* disable all channel and clear interrupt status */
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_IR, 0);
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_SR, 0xf);
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return (0);
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}
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static void
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clockintr(arg)
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void *arg;
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{
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struct trapframe *frame = arg;
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u_int32_t oscr, nextmatch, oldmatch;
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int s;
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#if 0
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mtx_lock_spin(&clock_lock);
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#endif
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_SR, 1);
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/* schedule next clock intr */
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oldmatch = saost_sc->sc_clock_count;
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nextmatch = oldmatch + TIMER_FREQUENCY / hz;
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oscr = bus_space_read_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_CR);
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if ((nextmatch > oldmatch &&
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(oscr > nextmatch || oscr < oldmatch)) ||
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(nextmatch < oldmatch && oscr > nextmatch && oscr < oldmatch)) {
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/*
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* we couldn't set the matching register in time.
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* just set it to some value so that next interrupt happens.
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* XXX is it possible to compansate lost interrupts?
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*/
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s = splhigh();
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oscr = bus_space_read_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_CR);
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nextmatch = oscr + 10;
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splx(s);
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}
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saost_sc->sc_clock_count = nextmatch;
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_MR0,
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nextmatch);
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hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
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#if 0
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mtx_unlock_spin(&clock_lock);
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#endif
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}
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#if 0
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static void
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statintr(arg)
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void *arg;
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{
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struct trapframe *frame = arg;
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u_int32_t oscr, nextmatch, oldmatch;
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int s;
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_SR, 2);
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/* schedule next clock intr */
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oldmatch = saost_sc->sc_statclock_count;
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nextmatch = oldmatch + saost_sc->sc_statclock_step;
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_MR1,
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nextmatch);
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oscr = bus_space_read_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_CR);
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if ((nextmatch > oldmatch &&
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(oscr > nextmatch || oscr < oldmatch)) ||
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(nextmatch < oldmatch && oscr > nextmatch && oscr < oldmatch)) {
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/*
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* we couldn't set the matching register in time.
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* just set it to some value so that next interrupt happens.
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* XXX is it possible to compansate lost interrupts?
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*/
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s = splhigh();
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oscr = bus_space_read_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_CR);
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nextmatch = oscr + 10;
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_MR1, nextmatch);
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splx(s);
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}
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saost_sc->sc_statclock_count = nextmatch;
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statclock(TRAPF_USERMODE(frame));
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}
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#endif
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#if 0
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void
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setstatclockrate(int hz)
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{
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u_int32_t count;
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saost_sc->sc_statclock_step = TIMER_FREQUENCY / hz;
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count = bus_space_read_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_CR);
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count += saost_sc->sc_statclock_step;
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saost_sc->sc_statclock_count = count;
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_MR1, count);
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}
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#endif
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void
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cpu_initclocks()
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{
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device_t dev = saost_sc->sc_dev;
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stathz = STATHZ;
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profhz = stathz;
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#if 0
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mtx_init(&clock_lock, "SA1110 Clock lock<63>", NULL, MTX_SPIN);
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#endif
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saost_sc->sc_statclock_step = TIMER_FREQUENCY / stathz;
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struct resource *irq1, *irq2;
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int rid = 0;
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void *ih1/*, *ih2 */;
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printf("clock: hz=%d stathz = %d\n", hz, stathz);
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/* Use the channels 0 and 1 for hardclock and statclock, respectively */
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saost_sc->sc_clock_count = TIMER_FREQUENCY / hz;
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saost_sc->sc_statclock_count = TIMER_FREQUENCY / stathz;
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irq1 = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0,
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~0, 1, RF_ACTIVE);
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rid = 1;
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irq2 = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
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RF_ACTIVE);
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bus_setup_intr(dev, irq1, INTR_TYPE_CLK | INTR_FAST, clockintr, NULL,
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&ih1);
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#if 0
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bus_setup_intr(dev, irq2, INTR_TYPE_CLK | INTR_FAST, statintr, NULL
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,&ih2);
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#endif
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_SR, 0xf);
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_IR, 3);
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_MR0,
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saost_sc->sc_clock_count);
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#if 0
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_MR1,
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0);
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#endif
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/* Zero the counter value */
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bus_space_write_4(saost_sc->sc_iot, saost_sc->sc_ioh, SAOST_CR, 0);
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}
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int
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gettick()
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{
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int counter;
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u_int savedints;
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savedints = disable_interrupts(I32_bit);
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counter = bus_space_read_4(saost_sc->sc_iot, saost_sc->sc_ioh,
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SAOST_CR);
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restore_interrupts(savedints);
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return counter;
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}
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void
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DELAY(usecs)
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int usecs;
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{
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u_int32_t tick, otick, delta;
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int j, csec, usec;
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csec = usecs / 10000;
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usec = usecs % 10000;
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usecs = (TIMER_FREQUENCY / 100) * csec
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+ (TIMER_FREQUENCY / 100) * usec / 10000;
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if (! saost_sc) {
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/* clock isn't initialized yet */
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for(; usecs > 0; usecs--)
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for(j = 100; j > 0; j--)
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;
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return;
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}
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#if 0
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mtx_lock_spin(&clock_lock);
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#endif
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otick = gettick();
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while (1) {
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for(j = 100; j > 0; j--)
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;
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tick = gettick();
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delta = tick - otick;
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if (delta > usecs) {
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break;
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}
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usecs -= delta;
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otick = tick;
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}
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#if 0
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mtx_unlock_spin(&clock_lock);
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#endif
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}
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void
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cpu_startprofclock(void)
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{
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printf("STARTPROFCLOCK\n");
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}
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void
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cpu_stopprofclock(void)
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{
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}
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