This patch implements support for the Intel 3100 integrated

northbridge and RAM controller. 

Signed-off-by: Ed Swierk <eswierk@arastra.com>                                                                                                                                               
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3158 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 88 insertions, 0 deletions

diff --git a/src/northbridge/intel/i3100/pciexp_porta.c b/src/northbridge/intel/i3100/pciexp_porta.c
new file mode 100644
index 0000000000..b887e5ec28
--- /dev/null
+++ b/src/northbridge/intel/i3100/pciexp_porta.c
@@ -0,0 +1,88 @@
+/*
+ * 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>
+
+typedef struct northbridge_intel_i3100_config config_t;
+
+static void pcie_init(struct device *dev)
+{
+	config_t *config;
+
+	/* Get the chip configuration */
+	config = dev->chip_info;
+
+	if(config->intrline) {
+		pci_write_config32(dev, 0x3c, config->intrline);
+	}
+
+}
+
+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, 0x76);
+		printk_debug("pcie porta 0x76: %02x\n", val);
+		if ((val & (1<<10)) && (!flag)) { /* training error */
+			ctl = pci_read_config16(dev, 0x74);
+			pci_write_config16(dev, 0x74, (ctl | (1<<5)));
+			val = pci_read_config16(dev, 0x76);
+			printk_debug("pcie porta reset 0x76: %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_PA,
+};
+
+static struct pci_driver pci_driver_1 __pci_driver = {
+	.ops    = &pcie_ops,
+	.vendor = PCI_VENDOR_ID_INTEL,
+	.device = PCI_DEVICE_ID_INTEL_3100_PCIE_PA1,
+};