ec/google/wilco: Add ACPI EC event handlers

Add methods to handle ACPI EC events at runtime.  Currently only
some common events are handled like lid switch and battery info,
and the event status is printed for debug on other events.

Change-Id: Ic0bd070940c8a2dfa6a251f3464301418bdb69c1
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29124
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/ec/google/wilco/acpi/ec.asl

@@ -134,6 +134,7 @@ Device (EC0)
 	#include "ec_ram.asl"
 	#include "ac.asl"
 	#include "battery.asl"
+	#include "event.asl"
 	#include "lid.asl"
 	#include "platform.asl"
 }

src/ec/google/wilco/acpi/event.asl

@@ -0,0 +1,126 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/* ACPI_POWER_RECORD */
+Name (ECPR, 0)
+
+Method (ECQP, 0, Serialized)
+{
+	Local0 = R (APWR)
+	Local1 = Local0 ^ ECPR
+	ECPR = Local0
+
+	If (EBIT (APAC, Local1)) {
+		Printf ("AC Power Status Changed")
+		Notify (AC, 0x80)
+	}
+
+	If (EBIT (APB1, Local1)) {
+		If (EBIT (APB1, Local0)) {
+			Printf ("BAT0 Inserted")
+			Notify (BAT0, 0x81)
+		} Else {
+			Printf ("BAT0 Removed")
+			Notify (BAT0, 0x80)
+			Notify (BAT0, 0x81)
+		}
+	}
+
+	If (EBIT (APC1, Local1)) {
+		Printf ("BAT0 Status Change")
+		Notify (BAT0, 0x80)
+	}
+}
+
+/* Handle events in PmEv1 */
+Method (ECQ1, 1, Serialized)
+{
+	/* Power button pressed */
+	If (EBIT (E1PB, Arg0)) {
+		Printf ("Power Button Event")
+		/* Do not notify \_SB.PWRB here to prevent double event */
+	}
+
+	/* LID state changed */
+	If (EBIT (E1LD, Arg0)) {
+		Printf ("Lid State Changed")
+		Notify (^LID, 0x80)
+	}
+
+	/* Power Event */
+	If (EBIT (E1PW, Arg0)) {
+		Printf ("Power Event")
+		ECQP ()
+	}
+
+	/* Sleep Button */
+	If (EBIT (E1SB, Arg0)) {
+		Printf ("Sleep Button")
+	}
+}
+
+/* Handle events in PmEv2 */
+Method (ECQ2, 1, Serialized)
+{
+	Printf ("EVT2: %o", Arg0)
+}
+
+/* Handle events in PmEv3 */
+Method (ECQ3, 1, Serialized)
+{
+	Printf ("EVT3: %o", Arg0)
+}
+
+/* Handle events in PmEv4 */
+Method (ECQ4, 1, Serialized)
+{
+	Printf ("EVT4: %o", Arg0)
+}
+
+/* Handle QuickSet events */
+Method (ECQS, 1, Serialized)
+{
+	Printf ("QS EVENT %o", Arg0)
+}
+
+/* Process all events */
+Method (_Q66, 0, Serialized)
+{
+	Local0 = R (EVT1)
+	If (Local0) {
+		ECQ1 (Local0)
+	}
+
+	Local0 = R (EVT2)
+	If (Local0) {
+		ECQ2 (Local0)
+	}
+
+	Local0 = R (EVT3)
+	If (Local0) {
+		ECQ3 (Local0)
+	}
+
+	Local0 = R (EVT4)
+	If (Local0) {
+		ECQ4 (Local0)
+	}
+
+	Local0 = R (QSEC)
+	For (Local1 = 0, Local1 < Local0, Local1++) {
+		ECQS (R (QSEB))
+	}
+}