| /* 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, |
| }; |