4 files changed, 84 insertions, 6 deletions
diff --git a/src/soc/intel/tigerlake/Kconfig b/src/soc/intel/tigerlake/Kconfig
index b9a5b60e17..79a4c6495b 100644
--- a/src/soc/intel/tigerlake/Kconfig
+++ b/src/soc/intel/tigerlake/Kconfig
@@ -55,6 +55,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_USB4
 	select SOC_INTEL_COMMON_BLOCK_USB4_PCIE
 	select SOC_INTEL_COMMON_BLOCK_USB4_XHCI
+	select SOC_INTEL_COMMON_BLOCK_XHCI_ELOG
 	select SOC_INTEL_COMMON_FSP_RESET
 	select SOC_INTEL_COMMON_PCH_BASE
 	select SOC_INTEL_COMMON_RESET
diff --git a/src/soc/intel/tigerlake/Makefile.inc b/src/soc/intel/tigerlake/Makefile.inc
index a25d0a4ee0..3103d60d3b 100644
--- a/src/soc/intel/tigerlake/Makefile.inc
+++ b/src/soc/intel/tigerlake/Makefile.inc
@@ -44,6 +44,7 @@ ramstage-y += smmrelocate.c
 ramstage-y += soundwire.c
 ramstage-y += systemagent.c
 ramstage-y += me.c
+ramstage-y += xhci.c
 
 smm-y += gpio.c
 smm-y += p2sb.c
@@ -51,6 +52,7 @@ smm-y += pmutil.c
 smm-y += smihandler.c
 smm-y += uart.c
 smm-y += elog.c
+smm-y += xhci.c
 
 verstage-y += gpio.c
 
diff --git a/src/soc/intel/tigerlake/elog.c b/src/soc/intel/tigerlake/elog.c
index a46afbb24c..88324d63cf 100644
--- a/src/soc/intel/tigerlake/elog.c
+++ b/src/soc/intel/tigerlake/elog.c
@@ -5,11 +5,17 @@
 #include <device/pci_ops.h>
 #include <elog.h>
 #include <intelblocks/pmclib.h>
+#include <intelblocks/xhci.h>
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
 #include <stdint.h>
 #include <types.h>
 
+struct pme_map {
+	pci_devfn_t devfn;
+	unsigned int wake_source;
+};
+
 static void pch_log_gpio_gpe(u32 gpe0_sts, u32 gpe0_en, int start)
 {
 	int i;
@@ -25,10 +31,6 @@ static void pch_log_gpio_gpe(u32 gpe0_sts, u32 gpe0_en, int start)
 static void pch_log_rp_wake_source(void)
 {
 	size_t i;
-	struct pme_map {
-		pci_devfn_t devfn;
-		unsigned int wake_source;
-	};
 
 	const struct pme_map pme_map[] = {
 		{ PCH_DEVFN_PCIE1, ELOG_WAKE_SOURCE_PME_PCIE1 },
@@ -55,6 +57,59 @@ static void pch_log_rp_wake_source(void)
 	}
 }
 
+static void pch_log_add_elog_event(const struct pme_map *ipme_map)
+{
+	/*
+	 * If wake source is XHCI, check for detailed wake source events on
+	 * USB2/3 ports.
+	 */
+	if ((ipme_map->devfn == PCH_DEVFN_XHCI) &&
+			pch_xhci_update_wake_event(soc_get_xhci_usb_info()))
+		return;
+
+	elog_add_event_wake(ipme_map->wake_source, 0);
+}
+
+static void pch_log_pme_internal_wake_source(void)
+{
+	size_t i;
+	bool dev_found = false;
+
+	const struct pme_map ipme_map[] = {
+		{ PCH_DEVFN_HDA, ELOG_WAKE_SOURCE_PME_HDA },
+		{ PCH_DEVFN_GBE, ELOG_WAKE_SOURCE_PME_GBE },
+		{ PCH_DEVFN_SATA, ELOG_WAKE_SOURCE_PME_SATA },
+		{ PCH_DEVFN_CSE, ELOG_WAKE_SOURCE_PME_CSE },
+		{ PCH_DEVFN_XHCI, ELOG_WAKE_SOURCE_PME_XHCI },
+		{ PCH_DEVFN_USBOTG, ELOG_WAKE_SOURCE_PME_XDCI },
+		{ PCH_DEVFN_CNVI_WIFI, ELOG_WAKE_SOURCE_PME_WIFI },
+	};
+
+	for (i = 0; i < ARRAY_SIZE(ipme_map); i++) {
+		const struct device *dev = pcidev_path_on_root(ipme_map[i].devfn);
+		if (!dev)
+			continue;
+
+		if (pci_dev_is_wake_source(dev)) {
+			pch_log_add_elog_event(&ipme_map[i]);
+			dev_found = true;
+		}
+	}
+
+	/*
+	 * If device is still not found, but the wake source is internal PME,
+	 * try probing XHCI ports to see if any of the USB2/3 ports indicate
+	 * that it was the wake source. This path would be taken in case of GSMI
+	 * logging with S0ix where the pci_pm_resume_noirq runs and clears the
+	 * PME_STS_BIT in controller register.
+	 */
+	if (!dev_found)
+		dev_found = pch_xhci_update_wake_event(soc_get_xhci_usb_info());
+
+	if (!dev_found)
+		elog_add_event_wake(ELOG_WAKE_SOURCE_PME_INTERNAL, 0);
+}
+
 static void pch_log_wake_source(struct chipset_power_state *ps)
 {
 	/* Power Button */
@@ -73,9 +128,9 @@ static void pch_log_wake_source(struct chipset_power_state *ps)
 	if (ps->gpe0_sts[GPE_STD] & PME_STS)
 		elog_add_event_wake(ELOG_WAKE_SOURCE_PME, 0);
 
-	/* Internal PME (TODO: determine wake device) */
+	/* Internal PME */
 	if (ps->gpe0_sts[GPE_STD] & PME_B0_STS)
-		elog_add_event_wake(ELOG_WAKE_SOURCE_PME_INTERNAL, 0);
+		pch_log_pme_internal_wake_source();
 
 	/* SMBUS Wake */
 	if (ps->gpe0_sts[GPE_STD] & SMB_WAK_STS)
diff --git a/src/soc/intel/tigerlake/xhci.c b/src/soc/intel/tigerlake/xhci.c
new file mode 100644
index 0000000000..18bb129983
--- /dev/null
+++ b/src/soc/intel/tigerlake/xhci.c
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <intelblocks/xhci.h>
+
+#define XHCI_USB2_PORT_STATUS_REG	0x480
+#define XHCI_USB3_PORT_STATUS_REG	0x520
+#define XHCI_USB2_PORT_NUM		10
+#define XHCI_USB3_PORT_NUM		4
+
+static const struct xhci_usb_info usb_info = {
+	.usb2_port_status_reg = XHCI_USB2_PORT_STATUS_REG,
+	.num_usb2_ports = XHCI_USB2_PORT_NUM,
+	.usb3_port_status_reg = XHCI_USB3_PORT_STATUS_REG,
+	.num_usb3_ports = XHCI_USB3_PORT_NUM,
+};
+
+const struct xhci_usb_info *soc_get_xhci_usb_info(void)
+{
+	return &usb_info;
+}