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/*
* 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,
};
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