2 * This file is part of the coreboot project.
4 * Copyright (C) 2008 Arastra, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 /* This code is based on src/northbridge/intel/e7520/pciexp_porta.c */
23 #include <console/console.h>
24 #include <device/device.h>
25 #include <device/pci.h>
26 #include <device/pci_ids.h>
27 #include <device/pci_ops.h>
28 #include <device/pciexp.h>
33 #define PCIE_LCTL 0x50
34 #define PCIE_LSTS 0x52
36 typedef struct northbridge_intel_i3100_config config_t;
38 static void pcie_init(struct device *dev)
42 static unsigned int pcie_scan_bridge(struct device *dev, unsigned int max)
48 val = pci_read_config16(dev, PCIE_LSTS);
49 printk(BIOS_DEBUG, "pcie portb link status: %02x\n", val);
50 if ((val & (1<<10)) && (!flag)) { /* training error */
51 ctl = pci_read_config16(dev, PCIE_LCTL);
52 pci_write_config16(dev, PCIE_LCTL, (ctl | (1<<5)));
53 val = pci_read_config16(dev, PCIE_LSTS);
54 printk(BIOS_DEBUG, "pcie portb reset link status: %02x\n", val);
58 } while (val & (3<<10));
59 return pciexp_scan_bridge(dev, max);
62 static struct device_operations pcie_ops = {
63 .read_resources = pci_bus_read_resources,
64 .set_resources = pci_dev_set_resources,
65 .enable_resources = pci_bus_enable_resources,
67 .scan_bus = pcie_scan_bridge,
68 .reset_bus = pci_bus_reset,
72 static const struct pci_driver pci_driver_0 __pci_driver = {
74 .vendor = PCI_VENDOR_ID_INTEL,
75 .device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB0,
78 static const struct pci_driver pci_driver_1 __pci_driver = {
80 .vendor = PCI_VENDOR_ID_INTEL,
81 .device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB1,
84 static const struct pci_driver pci_driver_2 __pci_driver = {
86 .vendor = PCI_VENDOR_ID_INTEL,
87 .device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB2,
90 static const struct pci_driver pci_driver_3 __pci_driver = {
92 .vendor = PCI_VENDOR_ID_INTEL,
93 .device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB3,