154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2020 Poul-Henning Kamp
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/eventhandler.h>
|
|
#include <sys/module.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/watchdog.h>
|
|
|
|
#include <dev/superio/superio.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/resource.h>
|
|
|
|
struct ftwd_softc {
|
|
eventhandler_tag wd_ev;
|
|
};
|
|
|
|
static void
|
|
ftwd_func(void *priv, u_int cmd, int *error)
|
|
{
|
|
device_t dev = priv;
|
|
uint64_t timeout;
|
|
uint8_t val = 0;
|
|
uint8_t minutes = 0;
|
|
|
|
if (cmd != 0) {
|
|
cmd &= WD_INTERVAL;
|
|
|
|
/* Convert the requested timeout to seconds. */
|
|
if (cmd >= WD_TO_1SEC)
|
|
timeout = (uint64_t)1 << (cmd - WD_TO_1SEC);
|
|
else
|
|
timeout = 1;
|
|
|
|
if (timeout <= UINT8_MAX) {
|
|
val = timeout;
|
|
*error = 0;
|
|
} else if ((timeout / 60) <= UINT8_MAX) {
|
|
val = timeout / 60;
|
|
minutes = 1;
|
|
*error = 0;
|
|
}
|
|
}
|
|
if (bootverbose) {
|
|
if (val == 0) {
|
|
device_printf(dev, "disabling watchdog\n");
|
|
} else {
|
|
device_printf(dev,
|
|
"arm watchdog to %d %s%s (Was: 0x%02x)\n",
|
|
val, minutes ? "minute" : "second",
|
|
val == 1 ? "" : "s",
|
|
superio_read(dev, 0xf6)
|
|
);
|
|
}
|
|
}
|
|
superio_write(dev, 0xf0, 0x00); // Disable WDTRST#
|
|
superio_write(dev, 0xf6, val); // Set Counter
|
|
|
|
if (minutes)
|
|
superio_write(dev, 0xf5, 0x7d); // minutes, act high, 125ms
|
|
else
|
|
superio_write(dev, 0xf5, 0x75); // seconds, act high, 125ms
|
|
|
|
if (val)
|
|
superio_write(dev, 0xf7, 0x01); // Disable PME
|
|
if (val)
|
|
superio_write(dev, 0xf0, 0x81); // Enable WDTRST#
|
|
else
|
|
superio_write(dev, 0xf0, 0x00); // Disable WDTRST
|
|
}
|
|
|
|
static int
|
|
ftwd_probe(device_t dev)
|
|
{
|
|
|
|
if (superio_vendor(dev) != SUPERIO_VENDOR_FINTEK ||
|
|
superio_get_type(dev) != SUPERIO_DEV_WDT)
|
|
return (ENXIO);
|
|
device_set_desc(dev, "Watchdog Timer on Fintek SuperIO");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
static int
|
|
ftwd_attach(device_t dev)
|
|
{
|
|
struct ftwd_softc *sc = device_get_softc(dev);
|
|
|
|
/*
|
|
* We do not touch the watchdog at this time, it might be armed
|
|
* by firmware to protect the full boot sequence.
|
|
*/
|
|
|
|
sc->wd_ev = EVENTHANDLER_REGISTER(watchdog_list, ftwd_func, dev, 0);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ftwd_detach(device_t dev)
|
|
{
|
|
struct ftwd_softc *sc = device_get_softc(dev);
|
|
int dummy;
|
|
|
|
if (sc->wd_ev != NULL)
|
|
EVENTHANDLER_DEREGISTER(watchdog_list, sc->wd_ev);
|
|
ftwd_func(dev, 0, &dummy);
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t ftwd_methods[] = {
|
|
DEVMETHOD(device_probe, ftwd_probe),
|
|
DEVMETHOD(device_attach, ftwd_attach),
|
|
DEVMETHOD(device_detach, ftwd_detach),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t ftwd_driver = {
|
|
"ftwd",
|
|
ftwd_methods,
|
|
sizeof (struct ftwd_softc)
|
|
};
|
|
|
|
DRIVER_MODULE(ftwd, superio, ftwd_driver, NULL, NULL);
|
|
MODULE_DEPEND(ftwd, superio, 1, 1, 1);
|
|
MODULE_VERSION(ftwd, 1);
|