From 3c6377fb4fcdff89e1509e9eeab7ce563dc45053 Mon Sep 17 00:00:00 2001
From: Naresh G Solanki <naresh.solanki@intel.com>
Date: Mon, 3 Jul 2017 21:57:11 +0530
Subject: [PATCH] driver/intel/wifi: Update wifi wake source in elog

In S3 resume, wifi is one of the wake sources.

If elog is enabled in config, then log wifi wakes in elog.

BUG=b:36992859
TEST= Build for Soraka. Do WoWlan during S3. Verify elog having update
on wake due to Wifi.

Change-Id: I7d42c5c81e0a3f7a3f94c3f6b7d2ebdf029d1aff
Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com>
Reviewed-on: https://review.coreboot.org/20455
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
---
 src/drivers/intel/wifi/wifi.c | 18 +++++++++++++++++-
 src/include/elog.h            |  1 +
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/drivers/intel/wifi/wifi.c b/src/drivers/intel/wifi/wifi.c
index 91c21fecff..d1d5684a19 100644
--- a/src/drivers/intel/wifi/wifi.c
+++ b/src/drivers/intel/wifi/wifi.c
@@ -21,12 +21,16 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
+#include <elog.h>
 #include <sar.h>
 #include <smbios.h>
 #include <string.h>
 #include <wrdd.h>
 #include "chip.h"
 
+#define PMCS_DR 0xcc
+#define PME_STS (1 << 15)
+
 #if IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLES)
 static int smbios_write_wifi(struct device *dev, int *handle,
 			     unsigned long *current)
@@ -197,6 +201,18 @@ static const char *intel_wifi_acpi_name(struct device *dev)
 }
 #endif
 
+static void wifi_pci_dev_init(struct device *dev)
+{
+	pci_dev_init(dev);
+
+	if (IS_ENABLED(CONFIG_ELOG)) {
+		uint32_t val;
+		val = pci_read_config16(dev, PMCS_DR);
+		if (val & PME_STS)
+			elog_add_event_wake(ELOG_WAKE_SOURCE_PME_WIFI, 0);
+        }
+}
+
 static struct pci_operations pci_ops = {
 	.set_subsystem = pci_dev_set_subsystem,
 };
@@ -205,7 +221,7 @@ struct device_operations device_ops = {
 	.read_resources           = pci_dev_read_resources,
 	.set_resources            = pci_dev_set_resources,
 	.enable_resources         = pci_dev_enable_resources,
-	.init                     = pci_dev_init,
+	.init                     = wifi_pci_dev_init,
 #if IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLES)
 	.get_smbios_data          = smbios_write_wifi,
 #endif
diff --git a/src/include/elog.h b/src/include/elog.h
index 57e278e151..bab7eb0594 100644
--- a/src/include/elog.h
+++ b/src/include/elog.h
@@ -149,6 +149,7 @@
 #define  ELOG_WAKE_SOURCE_PME_XDCI         0x1c
 #define  ELOG_WAKE_SOURCE_PME_XHCI_USB_2   0x1d
 #define  ELOG_WAKE_SOURCE_PME_XHCI_USB_3   0x1e
+#define  ELOG_WAKE_SOURCE_PME_WIFI         0x1f
 
 struct elog_event_data_wake {
 	u8 source;