pcie.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci.h>
#include <device/pciexp.h>
#include <device/pci_ids.h>
#include <assert.h>
 
#if 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 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,
        .init                   = pci_dev_init,
        .ops_pci                = &pci_dev_ops_pci,
#if 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_VID_INTEL,
        .devices        = pci_device_ids,
};