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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pciexp.h>
#include <device/pci_ids.h>
#include <southbridge/intel/common/pciehp.h>
#include "chip.h"
static void pci_init(struct device *dev)
{
struct southbridge_intel_i82801ix_config *config = dev->chip_info;
printk(BIOS_DEBUG, "Initializing ICH9 PCIe root port.\n");
/* Enable Bus Master */
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
/* Set Cache Line Size to 0x10 */
// This has no effect but the OS might expect it
pci_write_config8(dev, 0x0c, 0x10);
pci_and_config16(dev, PCI_BRIDGE_CONTROL, ~PCI_BRIDGE_CTL_PARITY);
/* Enable IO xAPIC on this PCIe port */
pci_or_config32(dev, 0xd8, 1 << 7);
/* Enable Backbone Clock Gating */
pci_or_config32(dev, 0xe1, (1 << 3) | (1 << 2) | (1 << 1) | (1 << 0));
/* Set VC0 transaction class */
pci_update_config32(dev, 0x114, ~0x000000ff, 1);
/* Mask completion timeouts */
pci_or_config32(dev, 0x148, 1 << 14);
/* Lock R/WO Correctable Error Mask. */
pci_update_config32(dev, 0x154, ~0, 0);
/* Clear errors in status registers */
pci_update_config16(dev, 0x06, ~0, 0);
pci_update_config16(dev, 0x1e, ~0, 0);
/* Get configured ASPM state */
const enum aspm_type apmc = pci_read_config32(dev, 0x50) & 3;
/* If both L0s and L1 enabled then set root port 0xE8[1]=1 */
if (apmc == PCIE_ASPM_BOTH)
pci_or_config32(dev, 0xe8, 1 << 1);
/* Enable expresscard hotplug events. */
if (config->pcie_hotplug_map[PCI_FUNC(dev->path.pci.devfn)]) {
pci_or_config32(dev, 0xd8, 1 << 30);
pci_write_config16(dev, 0x42, 0x142);
}
}
static void pch_pciexp_scan_bridge(struct device *dev)
{
struct southbridge_intel_i82801ix_config *config = dev->chip_info;
if (CONFIG(PCIEXP_HOTPLUG) && config->pcie_hotplug_map[PCI_FUNC(dev->path.pci.devfn)]) {
pciexp_hotplug_scan_bridge(dev);
} else {
/* Normal PCIe Scan */
pciexp_scan_bridge(dev);
}
}
static struct device_operations device_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = pci_init,
.scan_bus = pch_pciexp_scan_bridge,
.ops_pci = &pci_dev_ops_pci,
};
/* 82801Ix (ICH9DH/ICH9DO/ICH9R/ICH9/ICH9M-E/ICH9M) */
static const unsigned short pci_device_ids[] = {
PCI_DID_INTEL_82801IB_PCIE1, /* Port 1 */
PCI_DID_INTEL_82801IB_PCIE2, /* Port 2 */
PCI_DID_INTEL_82801IB_PCIE3, /* Port 3 */
PCI_DID_INTEL_82801IB_PCIE4, /* Port 4 */
PCI_DID_INTEL_82801IB_PCIE5, /* Port 5 */
PCI_DID_INTEL_82801IB_PCIE6, /* Port 6 */
0
};
static const struct pci_driver ich9_pcie __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VID_INTEL,
.devices = pci_device_ids,
};
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