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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
* Copyright (C) 2011 Google Inc.
* Copyright (C) 2013 Sage Electronic Engineering, LLC.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <watchdog.h>
#include "soc.h"
void watchdog_off(void)
{
struct device *dev;
u32 value, abase;
/* Turn off the watchdog. */
dev = dev_find_slot(0, PCI_DEVFN(0x1f, 0));
/* Enable I/O space. */
value = pci_read_config16(dev, 0x04);
value |= 1;
pci_write_config16(dev, 0x04, value);
/* Get TCO base. */
abase = (pci_read_config32(dev, ABASE) & ~0xf);
/* Disable the watchdog timer. */
value = inw(abase + 0x68);
value |= 1 << 11;
outw(value, abase + 0x68);
/* Clear TCO timeout status. */
outw(0x0008, abase + 0x64);
outw(0x0002, abase + 0x66);
printk(BIOS_DEBUG, "TCO Watchdog disabled\n");
}
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