soc/intel/common/block/usb4: Add TCSS XHCI driver for SSDT generation
In order to generate ACPI entries for USB devices attached to the
USB4/TBT/TCSS/North XHCI device it needs to have a driver that will
enumerate static devices on the bus. This driver does that and nothing
else.
BUG=b:151731851
TEST=boot on volteer and check for USB devices on \_SB.PCI0.TXHC.RHUB
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Change-Id: I5a2ff1cd1bed557e793d45119232cf87032ddd7b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46851
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/usb4/Kconfig b/src/soc/intel/common/block/usb4/Kconfig
index be0b378..fb876e1 100644
--- a/src/soc/intel/common/block/usb4/Kconfig
+++ b/src/soc/intel/common/block/usb4/Kconfig
@@ -11,3 +11,10 @@
help
Chip driver for adding PCI ops and SSDT generation for common Intel
USB4/Thunderbolt root ports.
+
+config SOC_INTEL_COMMON_BLOCK_USB4_XHCI
+ bool
+ default n
+ help
+ Minimal PCI driver for adding PCI ops and SSDT generation for common
+ Intel USB4/Thunderbolt North XHCI ports.
diff --git a/src/soc/intel/common/block/usb4/Makefile.inc b/src/soc/intel/common/block/usb4/Makefile.inc
index 89ce426..91f0991 100644
--- a/src/soc/intel/common/block/usb4/Makefile.inc
+++ b/src/soc/intel/common/block/usb4/Makefile.inc
@@ -1,2 +1,3 @@
ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_USB4) += usb4.c
ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_USB4_PCIE) += pcie.c
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_USB4_XHCI) += xhci.c
diff --git a/src/soc/intel/common/block/usb4/xhci.c b/src/soc/intel/common/block/usb4/xhci.c
new file mode 100644
index 0000000..4fe60dd
--- /dev/null
+++ b/src/soc/intel/common/block/usb4/xhci.c
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <intelblocks/acpi.h>
+#include <soc/pci_devs.h>
+
+static const char *usb4_xhci_acpi_name(const struct device *dev)
+{
+ if (dev->path.type != DEVICE_PATH_PCI)
+ return NULL;
+
+ return "TXHC";
+}
+
+static struct device_operations usb4_xhci_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .ops_pci = &pci_dev_ops_pci,
+ .scan_bus = scan_static_bus,
+#if CONFIG(HAVE_ACPI_TABLES)
+ .acpi_name = usb4_xhci_acpi_name,
+#endif
+};
+
+static const unsigned short pci_device_ids[] = {
+ PCI_DEVICE_ID_INTEL_TGP_TCSS_XHCI,
+ 0
+};
+
+static const struct pci_driver usb4_xhci __pci_driver = {
+ .ops = &usb4_xhci_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .devices = pci_device_ids,
+};