2 * This file is part of the coreboot project.
4 * Copyright (C) 2006 John Dufresne <jon.dufresne@gmail.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <console/console.h>
23 #include <device/device.h>
24 #include <device/pci.h>
26 /* TODO: I'm fairly sure the same functionality is provided elsewhere. */
28 void watchdog_off(void)
31 unsigned long value, base;
33 /* Turn off the ICH5 watchdog. */
34 dev = dev_find_slot(0, PCI_DEVFN(0x1f, 0));
36 /* Enable I/O space. */
37 value = pci_read_config16(dev, 0x04);
39 pci_write_config16(dev, 0x04, value);
42 base = (pci_read_config32(dev, 0x40) & 0x0fffe) + 0x60;
44 /* Disable the watchdog timer. */
45 value = inw(base + 0x08);
47 outw(value, base + 0x08);
49 /* Clear TCO timeout status. */
50 outw(0x0008, base + 0x04);
51 outw(0x0002, base + 0x06);
53 printk_debug("ICH Watchdog disabled\r\n");