Tim Wawrzynczak submitted this change.
soc/intel/common: Add PCI driver for USB4 ports
In order to enable SSDT generation for the DMA component of Intel USB4
ports, a PCI driver is required. This patch more or less adds a
`scan_bus` callback that will handle non-PCI devices downstream.
Change-Id: Ib9da051307b883eb99e500114378c9fd842ffc92
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46141
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
---
A src/soc/intel/common/block/usb4/Kconfig
A src/soc/intel/common/block/usb4/Makefile.inc
A src/soc/intel/common/block/usb4/usb4.c
3 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/src/soc/intel/common/block/usb4/Kconfig b/src/soc/intel/common/block/usb4/Kconfig
new file mode 100644
index 0000000..1516e75
--- /dev/null
+++ b/src/soc/intel/common/block/usb4/Kconfig
@@ -0,0 +1,6 @@
+config SOC_INTEL_COMMON_BLOCK_USB4
+ bool
+ default n
+ help
+ Minimal PCI Driver for enabling SSDT generation for the DMA component
+ of Intel Thunderbolt/USB4 ports.
diff --git a/src/soc/intel/common/block/usb4/Makefile.inc b/src/soc/intel/common/block/usb4/Makefile.inc
new file mode 100644
index 0000000..7dad4ba
--- /dev/null
+++ b/src/soc/intel/common/block/usb4/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_USB4) += usb4.c
diff --git a/src/soc/intel/common/block/usb4/usb4.c b/src/soc/intel/common/block/usb4/usb4.c
new file mode 100644
index 0000000..a0afc20
--- /dev/null
+++ b/src/soc/intel/common/block/usb4/usb4.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+
+static const unsigned short pci_device_ids[] = {
+ PCI_DEVICE_ID_INTEL_TGL_TBT_DMA0,
+ PCI_DEVICE_ID_INTEL_TGL_TBT_DMA1,
+ 0
+};
+
+static struct device_operations usb4_dev_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .scan_bus = scan_generic_bus,
+ .ops_pci = &pci_dev_ops_pci,
+};
+
+static const struct pci_driver usb4_driver __pci_driver = {
+ .ops = &usb4_dev_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .devices = pci_device_ids,
+};
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