| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2017-2018 Patrick Rudolph <siro@das-labor.org> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * 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. |
| */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pciexp.h> |
| #include <device/pci_ids.h> |
| #include <assert.h> |
| |
| static void pcie_disable(struct device *dev) |
| { |
| printk(BIOS_INFO, "%s: Disabling device\n", dev_path(dev)); |
| dev->enabled = 0; |
| } |
| |
| #if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) |
| static const char *pcie_acpi_name(const struct device *dev) |
| { |
| assert(dev); |
| |
| if (dev->path.type != DEVICE_PATH_PCI) |
| return NULL; |
| |
| assert(dev->bus); |
| if (dev->bus->secondary == 0) |
| switch (dev->path.pci.devfn) { |
| case PCI_DEVFN(1, 0): |
| return "PEGP"; |
| case PCI_DEVFN(1, 1): |
| return "PEG1"; |
| case PCI_DEVFN(1, 2): |
| return "PEG2"; |
| case PCI_DEVFN(6, 0): |
| return "PEG6"; |
| }; |
| |
| struct device *const port = dev->bus->dev; |
| assert(port); |
| assert(port->bus); |
| |
| if (dev->path.pci.devfn == PCI_DEVFN(0, 0) && |
| port->bus->secondary == 0 && |
| (port->path.pci.devfn == PCI_DEVFN(1, 0) || |
| port->path.pci.devfn == PCI_DEVFN(1, 1) || |
| port->path.pci.devfn == PCI_DEVFN(1, 2) || |
| port->path.pci.devfn == PCI_DEVFN(6, 0))) |
| return "DEV0"; |
| |
| return NULL; |
| } |
| #endif |
| |
| static void |
| pcie_set_subsystem(struct device *dev, unsigned int ven, unsigned int device) |
| { |
| /* NOTE: This is not the default position! */ |
| if (!ven || !device) |
| pci_write_config32(dev, 0x94, |
| pci_read_config32(dev, 0)); |
| else |
| pci_write_config32(dev, 0x94, |
| ((device & 0xffff) << 16) | (ven & 0xffff)); |
| } |
| |
| static struct pci_operations pci_ops = { |
| .set_subsystem = pcie_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, |
| .scan_bus = pciexp_scan_bridge, |
| .reset_bus = pci_bus_reset, |
| .disable = pcie_disable, |
| .init = pci_dev_init, |
| .ops_pci = &pci_ops, |
| #if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) |
| .acpi_name = pcie_acpi_name, |
| #endif |
| }; |
| |
| static const unsigned short pci_device_ids[] = { 0x0101, 0x0105, 0x0109, 0x010d, |
| 0x0151, 0x0155, 0x0159, 0x015d, |
| 0 }; |
| |
| static const struct pci_driver pch_pcie __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |