src/northbridge/intel/sandybridge/pcie.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/device.h>
   4 #include <device/pci.h>
   5 #include <device/pciexp.h>
   6 #include <device/pci_ids.h>
   7 #include <assert.h>
   8
   9 static const char *pcie_acpi_name(const struct device *dev)
  10 {
  11         assert(dev);
  12
  13         if (dev->path.type != DEVICE_PATH_PCI)
  14                 return NULL;
  15
  16         assert(dev->upstream);
  17         if (dev->upstream->secondary == 0)
  18                 switch (dev->path.pci.devfn) {
  19                 case PCI_DEVFN(1, 0):
  20                         return "PEGP";
  21                 case PCI_DEVFN(1, 1):
  22                         return "PEG1";
  23                 case PCI_DEVFN(1, 2):
  24                         return "PEG2";
  25                 case PCI_DEVFN(6, 0):
  26                         return "PEG6";
  27                 };
  28
  29         struct device *const port = dev->upstream->dev;
  30         assert(port);
  31         assert(port->upstream);
  32
  33         if (dev->path.pci.devfn == PCI_DEVFN(0, 0) &&
  34             port->upstream->secondary == 0 &&
  35             (port->path.pci.devfn == PCI_DEVFN(1, 0) ||
  36              port->path.pci.devfn == PCI_DEVFN(1, 1) ||
  37              port->path.pci.devfn == PCI_DEVFN(1, 2) ||
  38              port->path.pci.devfn == PCI_DEVFN(6, 0)))
  39                 return "DEV0";
  40
  41         return NULL;
  42 }
  43
  44 static struct device_operations device_ops = {
  45         .read_resources         = pci_bus_read_resources,
  46         .set_resources          = pci_dev_set_resources,
  47         .enable_resources       = pci_bus_enable_resources,
  48         .scan_bus               = pciexp_scan_bridge,
  49         .reset_bus              = pci_bus_reset,
  50         .init                   = pci_dev_init,
  51         .ops_pci                = &pci_dev_ops_pci,
  52         .acpi_name              = pcie_acpi_name,
  53 };
  54
  55 static const unsigned short pci_device_ids[] = {
  56         0x0101, 0x0105, 0x0109, 0x010d,
  57         0x0151, 0x0155, 0x0159, 0x015d,
  58         0,
  59 };
  60
  61 static const struct pci_driver pch_pcie __pci_driver = {
  62         .ops            = &device_ops,
  63         .vendor         = PCI_VID_INTEL,
  64         .devices        = pci_device_ids,
  65 };