| /* |
| * 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. |
| * |
| */ |
| |
| /* 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 <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 void pcie_scan_bridge(struct device *dev) |
| { |
| u16 val; |
| u16 ctl; |
| int flag = 0; |
| do { |
| val = pci_read_config16(dev, PCIE_LSTS); |
| printk(BIOS_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(BIOS_DEBUG, "pcie portb reset link status: %02x\n", val); |
| flag=1; |
| hard_reset(); |
| } |
| } while (val & (3<<10)); |
| |
| pciexp_scan_bridge(dev); |
| } |
| |
| 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 const 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 const 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 const 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 const struct pci_driver pci_driver_3 __pci_driver = { |
| .ops = &pcie_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = PCI_DEVICE_ID_INTEL_3100_PCIE_PB3, |
| }; |