summaryrefslogtreecommitdiff
path: root/src/southbridge/intel/bd82x6x/early_usb.c
blob: 0533ae747799485e1a37173cde9787970c712393 (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
 *
 * 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.
 */

#include <arch/io.h>
#include <console/console.h>
#include <device/pci_ids.h>
#include <device/pci_def.h>
#include "pch.h"

#define PCH_EHCI1_TEMP_BAR0 0xe8000000
#define PCH_EHCI2_TEMP_BAR0 0xe8000400

/*
 * Setup USB controller MMIO BAR to prevent the
 * reference code from resetting the controller.
 *
 * The BAR will be re-assigned during device
 * enumeration so these are only temporary.
 */
void enable_usb_bar(void)
{
	device_t usb0 = PCH_EHCI1_DEV;
	device_t usb1 = PCH_EHCI2_DEV;
	u32 cmd;

	/* USB Controller 1 */
	pci_write_config32(usb0, PCI_BASE_ADDRESS_0,
			   PCH_EHCI1_TEMP_BAR0);
	cmd = pci_read_config32(usb0, PCI_COMMAND);
	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
	pci_write_config32(usb0, PCI_COMMAND, cmd);

	/* USB Controller 2 */
	pci_write_config32(usb1, PCI_BASE_ADDRESS_0,
			   PCH_EHCI2_TEMP_BAR0);
	cmd = pci_read_config32(usb1, PCI_COMMAND);
	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
	pci_write_config32(usb1, PCI_COMMAND, cmd);
}