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/* $NetBSD: ctl.c,v 1.1 2009/02/10 06:04:56 rumble Exp $ */
/*
* Copyright (c) 2009 Stephen M. Rumble
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 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: ctl.c,v 1.1 2009/02/10 06:04:56 rumble Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <machine/cpu.h>
#include <machine/locore.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/machtype.h>
#include <machine/sysconf.h>
#include <sgimips/dev/ctlreg.h>
struct ctl_softc {
struct device sc_dev;
bus_space_tag_t iot;
bus_space_handle_t ioh;
};
static int ctl_match(struct device *, struct cfdata *, void *);
static void ctl_attach(struct device *, struct device *, void *);
static void ctl_bus_reset(void);
static void ctl_bus_error(uint32_t, uint32_t, uint32_t, uint32_t);
static void ctl_watchdog_enable(void);
static void ctl_watchdog_disable(void);
static void ctl_watchdog_tickle(void);
#if defined(BLINK)
static callout_t ctl_blink_ch;
static void ctl_blink(void *);
#endif
CFATTACH_DECL(ctl, sizeof(struct ctl_softc),
ctl_match, ctl_attach, NULL, NULL);
static struct ctl_softc csc;
static int
ctl_match(struct device * parent, struct cfdata * match, void *aux)
{
/*
* CTL exists on IP6/IP10 systems.
*/
if (mach_type == MACH_SGI_IP6 || mach_type == MACH_SGI_IP10)
return 1;
else
return 0;
}
static void
ctl_attach(struct device * parent, struct device * self, void *aux)
{
struct mainbus_attach_args *ma = aux;
#ifdef BLINK
callout_init(&ctl_blink_ch, 0);
#endif
csc.iot = SGIMIPS_BUS_SPACE_NORMAL;
if (bus_space_map(csc.iot, ma->ma_addr, 0,
BUS_SPACE_MAP_LINEAR, &csc.ioh))
panic("ctl_attach: could not allocate memory\n");
platform.bus_reset = ctl_bus_reset;
platform.intr5 = ctl_bus_error;
platform.watchdog_enable = ctl_watchdog_enable;
platform.watchdog_disable = ctl_watchdog_disable;
platform.watchdog_reset = ctl_watchdog_tickle;
bus_space_write_2(csc.iot, csc.ioh, CTL_CPUCTRL,
(CTL_CPUCTRL_PARITY | CTL_CPUCTRL_SLAVE));
printf("\n");
ctl_bus_reset();
#if defined(BLINK)
ctl_blink(&csc);
#endif
}
static void
ctl_bus_reset(void)
{
bus_space_read_1(csc.iot, csc.ioh, CTL_LAN_PAR_CLR);
bus_space_read_1(csc.iot, csc.ioh, CTL_DMA_PAR_CLR);
bus_space_read_1(csc.iot, csc.ioh, CTL_CPU_PAR_CLR);
bus_space_read_1(csc.iot, csc.ioh, CTL_VME_PAR_CLR);
}
static void
ctl_bus_error(uint32_t status, uint32_t cause, uint32_t pc, uint32_t ipending)
{
printf("ctl0: bus error\n");
ctl_bus_reset();
}
static void
ctl_watchdog_enable(void)
{
uint32_t reg;
/* XXX- doesn't seem to work properly */
return;
reg = bus_space_read_2(csc.iot, csc.ioh, CTL_CPUCTRL);
reg |= CTL_CPUCTRL_WDOG;
bus_space_write_2(csc.iot, csc.ioh, CTL_CPUCTRL, reg);
}
static void
ctl_watchdog_disable(void)
{
uint16_t reg;
/* XXX- doesn't seem to work properly */
return;
reg = bus_space_read_2(csc.iot, csc.ioh, CTL_CPUCTRL_WDOG);
reg &= ~(CTL_CPUCTRL_WDOG);
bus_space_write_2(csc.iot, csc.ioh, CTL_CPUCTRL, reg);
}
static void
ctl_watchdog_tickle(void)
{
ctl_watchdog_disable();
ctl_watchdog_enable();
}
#if defined(BLINK)
static void
ctl_blink(void *self)
{
struct ctl_softc *sc = (struct ctl_softc *) self;
int s, value;
s = splhigh();
value = bus_space_read_1(sc->iot, sc->ioh, CTL_AUX_CPUCTRL);
value ^= CTL_AUX_CPUCTRL_CONSLED;
bus_space_write_1(sc->iot, sc->ioh, CTL_AUX_CPUCTRL, value);
splx(s);
/*
* Blink rate is:
* full cycle every second if completely idle (loadav = 0)
* full cycle every 2 seconds if loadav = 1
* full cycle every 3 seconds if loadav = 2
* etc.
*/
s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1));
callout_reset(&ctl_blink_ch, s, ctl_blink, sc);
}
#endif
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