1 files changed, 61 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801bx/smbus.c b/src/southbridge/intel/i82801bx/smbus.c
new file mode 100644
index 0000000000..d4a609ae3f
--- /dev/null
+++ b/src/southbridge/intel/i82801bx/smbus.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2005 Yinghai Lu <yinghailu@gmail.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <stdint.h>
+#include <device/smbus.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <arch/io.h>
+#include "i82801bx.h"
+#include "smbus.h"
+
+static int lsmbus_read_byte(device_t dev, u8 address)
+{
+	u16 device;
+	struct resource *res;
+	struct bus *pbus;
+
+	device = dev->path.i2c.device;
+	pbus = get_pbus_smbus(dev);
+	res = find_resource(pbus->dev, 0x20);
+
+	return do_smbus_read_byte(res->base, device, address);
+}
+
+static struct smbus_bus_operations lops_smbus_bus = {
+	.read_byte	= lsmbus_read_byte,
+};
+
+static const struct device_operations smbus_ops = {
+	.read_resources		= pci_dev_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_dev_enable_resources,
+	.init			= 0,
+	.scan_bus		= scan_static_bus,
+	.enable			= i82801bx_enable,
+	.ops_smbus_bus		= &lops_smbus_bus,
+};
+
+/* 82801BA/BAM (ICH2/ICH2-M) */
+static const struct pci_driver i82801ba_smb __pci_driver = {
+	.ops	= &smbus_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.device	= PCI_DEVICE_ID_INTEL_82801BA_SMB,
+};