2 * This file is part of the coreboot project.
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
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
22 #include <device/pci_ids.h>
25 #define PM_IO_BASE 0xe400
27 static void enable_pm(void)
33 /* Check for SMBus/PM device PCI ID on the 82371AB/EB/MB. */
34 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_INTEL,
35 PCI_DEVICE_ID_INTEL_82371AB_SMB_ACPI), 0);
37 if (dev == PCI_DEV_INVALID)
38 die("SMBus/PM controller not found\n");
40 /* Set the PM I/O base. */
41 pci_write_config32(dev, PMBA, PM_IO_BASE | 1);
43 /* Enable access to the PM I/O space. */
44 reg16 = pci_read_config16(dev, PCI_COMMAND);
45 reg16 |= PCI_COMMAND_IO;
46 pci_write_config16(dev, PCI_COMMAND, reg16);
48 /* PM I/O Space Enable (PMIOSE). */
49 reg8 = pci_read_config8(dev, PMREGMISC);
51 pci_write_config8(dev, PMREGMISC, reg8);