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