1 files changed, 94 insertions, 0 deletions
diff --git a/src/southbridge/intel/i3100/i3100_pciexp_portb.c b/src/southbridge/intel/i3100/i3100_pciexp_portb.c
new file mode 100644
index 0000000..7fd1718
--- /dev/null
+++ b/src/southbridge/intel/i3100/i3100_pciexp_portb.c
@@ -0,0 +1,94 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008 Arastra, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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
+ *
+ */
+
+/* This code is based on src/northbridge/intel/e7520/pciexp_porta.c */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <device/pciexp.h>
+#include <arch/io.h>
+#include "chip.h"
+#include <part/hard_reset.h>
+
+#define PCIE_LCTL 0x50
+#define PCIE_LSTS 0x52
+
+typedef struct northbridge_intel_i3100_config config_t;
+
+static void pcie_init(struct device *dev)
+{
+}
+
+static unsigned int pcie_scan_bridge(struct device *dev, unsigned int max)
+{
+	u16 val;
+	u16 ctl;
+	int flag = 0;
+	do {
+		val = pci_read_config16(dev, PCIE_LSTS);
+		printk_debug("pcie portb link status: %02x\n", val);
+		if ((val & (1<<10)) && (!flag)) { /* training error */
+			ctl = pci_read_config16(dev, PCIE_LCTL);
+			pci_write_config16(dev, PCIE_LCTL, (ctl | (1<<5)));
+			val = pci_read_config16(dev, PCIE_LSTS);
+			printk_debug("pcie portb reset link status: %02x\n", val);
+			flag=1;
+			hard_reset();
+		}
+	} while	(val & (3<<10));
+	return pciexp_scan_bridge(dev, max);
+}
+
+static struct device_operations pcie_ops  = {
+	.read_resources   = pci_bus_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_bus_enable_resources,
+	.init             = pcie_init,
+	.scan_bus         = pcie_scan_bridge,
+	.reset_bus        = pci_bus_reset,
+	.ops_pci          = 0,
+};
+
+static struct pci_driver pci_driver_0 __pci_driver = {
+	.ops    = &pcie_ops,
+	.vendor = PCI_VENDOR_ID_INTEL,
+	.device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB0,
+};
+
+static struct pci_driver pci_driver_1 __pci_driver = {
+	.ops    = &pcie_ops,
+	.vendor = PCI_VENDOR_ID_INTEL,
+	.device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB1,
+};
+
+static struct pci_driver pci_driver_2 __pci_driver = {
+	.ops    = &pcie_ops,
+	.vendor = PCI_VENDOR_ID_INTEL,
+	.device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB2,
+};
+
+static struct pci_driver pci_driver_3 __pci_driver = {
+	.ops    = &pcie_ops,
+	.vendor = PCI_VENDOR_ID_INTEL,
+	.device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB3,
+};