intel/cannonlake/chip: Add initial PCI enum support

Add callbacks for initial PCI devices enumeration.

Change-Id: Ia8a51973aa2b805d62590114bfc49968244b1668
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21053
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

1 files changed, 30 insertions, 1 deletions

diff --git a/src/soc/intel/cannonlake/chip.c b/src/soc/intel/cannonlake/chip.c
index 2f893e3d48..62181a383f 100644
--- a/src/soc/intel/cannonlake/chip.c
+++ b/src/soc/intel/cannonlake/chip.c
@@ -15,9 +15,9 @@
 
 #include <chip.h>
 #include <console/console.h>
+#include <device/device.h>
 #include <device/pci.h>
 #include <fsp/api.h>
-#include <fsp/api.h>
 #include <fsp/util.h>
 #include <romstage_handoff.h>
 #include <soc/ramstage.h>
@@ -29,8 +29,37 @@ void soc_init_pre_device(void *chip_info)
 	fsp_silicon_init(romstage_handoff_is_resume());
 }
 
+static void pci_domain_set_resources(device_t dev)
+{
+	assign_resources(dev->link_list);
+}
+
+static struct device_operations pci_domain_ops = {
+	.read_resources   = &pci_domain_read_resources,
+	.set_resources    = &pci_domain_set_resources,
+	.scan_bus         = &pci_domain_scan_bus,
+	.ops_pci_bus      = &pci_bus_default_ops,
+};
+
+static struct device_operations cpu_bus_ops = {
+	.read_resources   = DEVICE_NOOP,
+	.set_resources    = DEVICE_NOOP,
+	.enable_resources = DEVICE_NOOP,
+	.init             = DEVICE_NOOP,
+};
+
+static void soc_enable(device_t dev)
+{
+	/* Set the operations if it is a special bus type */
+	if (dev->path.type == DEVICE_PATH_DOMAIN)
+		dev->ops = &pci_domain_ops;
+	else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER)
+		dev->ops = &cpu_bus_ops;
+}
+
 struct chip_operations soc_intel_cannonlake_ops = {
 	CHIP_NAME("Intel Cannonlake")
+	.enable_dev	= &soc_enable,
 	.init		= &soc_init_pre_device,
 };