summaryrefslogtreecommitdiff
path: root/src/southbridge/intel/fsp_rangeley/watchdog.c
blob: 06ab0894f96473d332eb227081b7e35ded12c582 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/*
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#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)
{
	device_t 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");
}