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-rw-r--r--src/soc/intel/tigerlake/finalize.c14
-rw-r--r--src/soc/intel/tigerlake/include/soc/pci_devs.h2
2 files changed, 16 insertions, 0 deletions
diff --git a/src/soc/intel/tigerlake/finalize.c b/src/soc/intel/tigerlake/finalize.c
index 534abd9453..5bf01de7f0 100644
--- a/src/soc/intel/tigerlake/finalize.c
+++ b/src/soc/intel/tigerlake/finalize.c
@@ -67,12 +67,26 @@ static void pch_finalize(void)
pmc_clear_pmcon_sts();
}
+static void tbt_finalize(void)
+{
+ int i;
+ const struct device *dev;
+
+ /* Disable Thunderbolt PCIe root ports bus master */
+ for (i = 0; i < NUM_TBT_FUNCTIONS; i++) {
+ dev = pcidev_path_on_root(SA_DEVFN_TBT(i));
+ if (dev)
+ pci_dev_disable_bus_master(dev);
+ }
+}
+
static void soc_finalize(void *unused)
{
printk(BIOS_DEBUG, "Finalizing chipset.\n");
pch_finalize();
apm_control(APM_CNT_FINALIZE);
+ tbt_finalize();
/* Indicate finalize step with post code */
post_code(POST_OS_BOOT);
diff --git a/src/soc/intel/tigerlake/include/soc/pci_devs.h b/src/soc/intel/tigerlake/include/soc/pci_devs.h
index ee3e894a92..82d8360524 100644
--- a/src/soc/intel/tigerlake/include/soc/pci_devs.h
+++ b/src/soc/intel/tigerlake/include/soc/pci_devs.h
@@ -35,6 +35,8 @@
#define SA_DEV_IPU PCI_DEV(0, SA_DEV_SLOT_IPU, 0)
#define SA_DEV_SLOT_TBT 0x07
+#define SA_DEVFN_TBT(x) PCI_DEVFN(SA_DEV_SLOT_TBT, (x))
+#define NUM_TBT_FUNCTIONS 4
#define SA_DEVFN_TBT0 PCI_DEVFN(SA_DEV_SLOT_TBT, 0)
#define SA_DEVFN_TBT1 PCI_DEVFN(SA_DEV_SLOT_TBT, 1)
#define SA_DEVFN_TBT2 PCI_DEVFN(SA_DEV_SLOT_TBT, 2)