| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_def.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) |
| { |
| u16 reg16; |
| u32 reg32; |
| struct southbridge_intel_i82801ix_config *config = dev->chip_info; |
| |
| printk(BIOS_DEBUG, "Initializing ICH9 PCIe root port.\n"); |
| |
| /* Enable Bus Master */ |
| reg32 = pci_read_config32(dev, PCI_COMMAND); |
| reg32 |= PCI_COMMAND_MASTER; |
| pci_write_config32(dev, PCI_COMMAND, reg32); |
| |
| /* Set Cache Line Size to 0x10 */ |
| // This has no effect but the OS might expect it |
| pci_write_config8(dev, 0x0c, 0x10); |
| |
| reg16 = pci_read_config16(dev, PCI_BRIDGE_CONTROL); |
| reg16 &= ~PCI_BRIDGE_CTL_PARITY; |
| reg16 |= PCI_BRIDGE_CTL_NO_ISA; |
| pci_write_config16(dev, PCI_BRIDGE_CONTROL, reg16); |
| |
| /* Enable IO xAPIC on this PCIe port */ |
| reg32 = pci_read_config32(dev, 0xd8); |
| reg32 |= (1 << 7); |
| pci_write_config32(dev, 0xd8, reg32); |
| |
| /* Enable Backbone Clock Gating */ |
| reg32 = pci_read_config32(dev, 0xe1); |
| reg32 |= (1 << 3) | (1 << 2) | (1 << 1) | (1 << 0); |
| pci_write_config32(dev, 0xe1, reg32); |
| |
| /* Set VC0 transaction class */ |
| reg32 = pci_read_config32(dev, 0x114); |
| reg32 &= 0xffffff00; |
| reg32 |= 1; |
| pci_write_config32(dev, 0x114, reg32); |
| |
| /* Mask completion timeouts */ |
| reg32 = pci_read_config32(dev, 0x148); |
| reg32 |= (1 << 14); |
| pci_write_config32(dev, 0x148, reg32); |
| |
| /* Lock R/WO Correctable Error Mask. */ |
| pci_write_config32(dev, 0x154, pci_read_config32(dev, 0x154)); |
| |
| /* Clear errors in status registers */ |
| reg16 = pci_read_config16(dev, 0x06); |
| pci_write_config16(dev, 0x06, reg16); |
| reg16 = pci_read_config16(dev, 0x1e); |
| pci_write_config16(dev, 0x1e, reg16); |
| |
| /* 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) { |
| reg32 = pci_read_config32(dev, 0xe8); |
| reg32 |= (1 << 1); |
| pci_write_config32(dev, 0xe8, reg32); |
| } |
| |
| /* Enable expresscard hotplug events. */ |
| if (config->pcie_hotplug_map[PCI_FUNC(dev->path.pci.devfn)]) { |
| pci_write_config32(dev, 0xd8, |
| pci_read_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; |
| |
| /* Normal PCIe Scan */ |
| pciexp_scan_bridge(dev); |
| |
| if (config->pcie_hotplug_map[PCI_FUNC(dev->path.pci.devfn)]) { |
| intel_acpi_pcie_hotplug_scan_slot(dev->link_list); |
| } |
| } |
| |
| static struct pci_operations pci_ops = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| 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_ops, |
| }; |
| |
| /* 82801Ix (ICH9DH/ICH9DO/ICH9R/ICH9/ICH9M-E/ICH9M) */ |
| static const unsigned short pci_device_ids[] = { |
| PCI_DEVICE_ID_INTEL_82801IB_PCIE1, /* Port 1 */ |
| PCI_DEVICE_ID_INTEL_82801IB_PCIE2, /* Port 2 */ |
| PCI_DEVICE_ID_INTEL_82801IB_PCIE3, /* Port 3 */ |
| PCI_DEVICE_ID_INTEL_82801IB_PCIE4, /* Port 4 */ |
| PCI_DEVICE_ID_INTEL_82801IB_PCIE5, /* Port 5 */ |
| PCI_DEVICE_ID_INTEL_82801IB_PCIE6, /* Port 6 */ |
| 0 |
| }; |
| static const struct pci_driver ich9_pcie __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |