1 files changed, 57 insertions, 0 deletions
diff --git a/src/southbridge/intel/lynxpoint/early_usb.c b/src/southbridge/intel/lynxpoint/early_usb.c
new file mode 100644
index 0000000000..b2e009123e
--- /dev/null
+++ b/src/southbridge/intel/lynxpoint/early_usb.c
@@ -0,0 +1,57 @@
+/*
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <arch/io.h>
+#include <arch/romcc_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 1 */
+	pci_write_config32(usb1, PCI_BASE_ADDRESS_0,
+			   PCH_EHCI1_TEMP_BAR0);
+	cmd = pci_read_config32(usb1, PCI_COMMAND);
+	cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_write_config32(usb1, PCI_COMMAND, cmd);
+}