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/*
* 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.
*
*/
/* 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,
};
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