2 files changed, 45 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/Makefile.inc b/src/soc/intel/alderlake/Makefile.inc
index f31cf98dd7..fc3d63e0fa 100644
--- a/src/soc/intel/alderlake/Makefile.inc
+++ b/src/soc/intel/alderlake/Makefile.inc
@@ -45,6 +45,7 @@ ramstage-y += reset.c
 ramstage-y += smmrelocate.c
 ramstage-y += soundwire.c
 ramstage-y += systemagent.c
+ramstage-y += xhci.c
 
 smm-y += gpio.c
 smm-y += p2sb.c
diff --git a/src/soc/intel/alderlake/xhci.c b/src/soc/intel/alderlake/xhci.c
new file mode 100644
index 0000000000..922633667f
--- /dev/null
+++ b/src/soc/intel/alderlake/xhci.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/pci_type.h>
+#include <intelblocks/xhci.h>
+#include <soc/pci_devs.h>
+
+/*
+ * Information obtained from Intel doc# 630094, ADL-P PCH EDS Vol. 2,
+ * as well as doc# 626817, ADL-P PCH EDS Vol. 1
+ */
+
+#define PCH_XHCI_USB2_PORT_STATUS_REG	0x480
+#define PCH_XHCI_USB3_PORT_STATUS_REG	0x540
+#define PCH_XHCI_USB2_PORT_NUM		10
+#define PCH_XHCI_USB3_PORT_NUM		4
+
+#define TCSS_XHCI_USB2_PORT_STATUS_REG	0x480
+#define TCSS_XHCI_USB3_PORT_STATUS_REG	0x540
+#define TCSS_XHCI_USB2_PORT_NUM		10
+#define TCSS_XHCI_USB3_PORT_NUM		4
+
+static const struct xhci_usb_info usb_info = {
+	.usb2_port_status_reg = PCH_XHCI_USB2_PORT_STATUS_REG,
+	.num_usb2_ports = PCH_XHCI_USB2_PORT_NUM,
+	.usb3_port_status_reg = PCH_XHCI_USB3_PORT_STATUS_REG,
+	.num_usb3_ports = PCH_XHCI_USB3_PORT_NUM,
+};
+
+static const struct xhci_usb_info tcss_usb_info = {
+	.usb2_port_status_reg = TCSS_XHCI_USB2_PORT_STATUS_REG,
+	.num_usb2_ports = TCSS_XHCI_USB2_PORT_NUM,
+	.usb3_port_status_reg = TCSS_XHCI_USB3_PORT_STATUS_REG,
+	.num_usb3_ports = TCSS_XHCI_USB3_PORT_NUM,
+};
+
+const struct xhci_usb_info *soc_get_xhci_usb_info(pci_devfn_t xhci_dev)
+{
+	if (xhci_dev == PCH_DEVFN_XHCI)
+		return &usb_info;
+	else if (xhci_dev == SA_DEVFN_TCSS_XHCI)
+		return &tcss_usb_info;
+
+	return NULL;
+}