From 8a78f5903952f1dee3ecbde8b8ea613c78639d48 Mon Sep 17 00:00:00 2001
From: Tim Wawrzynczak <twawrzynczak@chromium.org>
Date: Tue, 3 Nov 2020 13:16:27 -0700
Subject: soc/intel/tigerlake: Add PCH PCIe RPs wake up events to event log

All wakes by a PCH PCIe root port were lumped under one event source;
this commit splits them up so each root port gets its own ID in the
event log.

BUG=b:172279061
BRANCH=volteer

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Icebcac3b69c605ecf6df37733b641397ea3c3ad0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47182
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
---
 src/soc/intel/tigerlake/elog.c | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

(limited to 'src/soc/intel/tigerlake')

diff --git a/src/soc/intel/tigerlake/elog.c b/src/soc/intel/tigerlake/elog.c
index 84f0a7ed4f..a46afbb24c 100644
--- a/src/soc/intel/tigerlake/elog.c
+++ b/src/soc/intel/tigerlake/elog.c
@@ -2,11 +2,13 @@
 
 #include <bootstate.h>
 #include <console/console.h>
-#include <stdint.h>
+#include <device/pci_ops.h>
 #include <elog.h>
 #include <intelblocks/pmclib.h>
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
+#include <stdint.h>
+#include <types.h>
 
 static void pch_log_gpio_gpe(u32 gpe0_sts, u32 gpe0_en, int start)
 {
@@ -20,6 +22,39 @@ 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 },
+		{ PCH_DEVFN_PCIE2, ELOG_WAKE_SOURCE_PME_PCIE2 },
+		{ PCH_DEVFN_PCIE3, ELOG_WAKE_SOURCE_PME_PCIE3 },
+		{ PCH_DEVFN_PCIE4, ELOG_WAKE_SOURCE_PME_PCIE4 },
+		{ PCH_DEVFN_PCIE5, ELOG_WAKE_SOURCE_PME_PCIE5 },
+		{ PCH_DEVFN_PCIE6, ELOG_WAKE_SOURCE_PME_PCIE6 },
+		{ PCH_DEVFN_PCIE7, ELOG_WAKE_SOURCE_PME_PCIE7 },
+		{ PCH_DEVFN_PCIE8, ELOG_WAKE_SOURCE_PME_PCIE8 },
+		{ PCH_DEVFN_PCIE9, ELOG_WAKE_SOURCE_PME_PCIE9 },
+		{ PCH_DEVFN_PCIE10, ELOG_WAKE_SOURCE_PME_PCIE10 },
+		{ PCH_DEVFN_PCIE11, ELOG_WAKE_SOURCE_PME_PCIE11 },
+		{ PCH_DEVFN_PCIE12, ELOG_WAKE_SOURCE_PME_PCIE12 },
+	};
+
+	for (i = 0; i < MIN(CONFIG_MAX_ROOT_PORTS, ARRAY_SIZE(pme_map)); ++i) {
+		const struct device *dev = pcidev_path_on_root(pme_map[i].devfn);
+		if (!dev)
+			continue;
+
+		if (pci_dev_is_wake_source(dev))
+			elog_add_event_wake(pme_map[i].wake_source, 0);
+	}
+}
+
 static void pch_log_wake_source(struct chipset_power_state *ps)
 {
 	/* Power Button */
@@ -32,7 +67,7 @@ static void pch_log_wake_source(struct chipset_power_state *ps)
 
 	/* PCI Express (TODO: determine wake device) */
 	if (ps->pm1_sts & PCIEXPWAK_STS)
-		elog_add_event_wake(ELOG_WAKE_SOURCE_PCIE, 0);
+		pch_log_rp_wake_source();
 
 	/* PME (TODO: determine wake device) */
 	if (ps->gpe0_sts[GPE_STD] & PME_STS)
-- 
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