1 files changed, 137 insertions, 0 deletions
diff --git a/src/ec/google/wilco/acpi/ec.asl b/src/ec/google/wilco/acpi/ec.asl
new file mode 100644
index 0000000000..8197c549a7
--- /dev/null
+++ b/src/ec/google/wilco/acpi/ec.asl
@@ -0,0 +1,137 @@
+/*
+ * 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.
+ */
+
+Device (EC0)
+{
+	Name (_HID, EisaId ("PNP0C09"))
+	Name (_UID, 1)
+	Name (_GPE, EC_SCI_GPI)
+	Name (_STA, 0xf)
+
+	Name (_CRS, ResourceTemplate() {
+		IO (Decode16,
+		    CONFIG_EC_BASE_ACPI_DATA,
+		    CONFIG_EC_BASE_ACPI_DATA,
+		    4, 4)
+		IO (Decode16,
+		    CONFIG_EC_BASE_ACPI_COMMAND,
+		    CONFIG_EC_BASE_ACPI_COMMAND,
+		    4, 4)
+	})
+
+	/* Handle registration of EmbeddedControl region */
+	Name (EREG, Zero)
+	OperationRegion (ERAM, EmbeddedControl, 0, 0xff)
+	Method (_REG, 2)
+	{
+		/* Indicate region is registered */
+		EREG = Arg1
+
+		/* Store initial value for power status */
+		ECPR = R (APWR)
+
+		/* Indicate to EC that OS is ready for queries */
+		W (ERDY, One)
+
+		/* Tell EC to stop emulating PS/2 mouse */
+		W (PS2M, Zero)
+	}
+
+	/*
+	 * Find bitmask for field
+	 *  Arg0 = EC field structure
+	 *  Arg1 = Value
+	 */
+	Method (EBIT, 2, NotSerialized)
+	{
+		Local0 = DeRefOf (Arg0[1])	/* Mask */
+		Local1 = Arg1 & Local0
+		FindSetRightBit (Local0, Local2)
+		If (Local2) {
+			Local1 >>= Local2 - 1
+		}
+		Return (Local1)
+	}
+
+	/*
+	 * READ or WRITE from EC region
+	 *  Arg0 = EC field structure
+	 *  Arg1 = Value to write
+	 */
+	Method (ECRW, 2, Serialized)
+	{
+		If (!EREG) {
+			Return (Zero)
+		}
+
+		Local0 = DeRefOf (Arg0[0])	/* Byte offset */
+		Local1 = DeRefOf (Arg0[1])	/* Mask */
+		Local2 = DeRefOf (Arg0[2])	/* Read/Write */
+
+		OperationRegion (ERAM, EmbeddedControl, Local0, 2)
+		Field (ERAM, ByteAcc, Lock, WriteAsZeros)
+		{
+			BYT1, 8,
+			BYT2, 8,
+		}
+
+		If (Local2 == RD) {
+			/* Read first byte */
+			Local3 = BYT1
+
+			/* Read second byte if needed */
+			FindSetLeftBit (Local1, Local4)
+			If (Local4 > 8) {
+				Local4 = BYT2
+				Local4 <<= 8
+				Local3 |= Local4
+			}
+
+			Local5 = EBIT (Arg0, Local3)
+			Printf ("ECRD %o = %o", Local0, Local5)
+			Return (Local5)
+		} ElseIf (Local2 == WR) {
+			/* Write byte */
+			Printf ("ECWR %o = %o", Local0, Arg1)
+			BYT1 = Arg1
+		}
+		Return (Zero)
+	}
+
+	/*
+	 * Read a field from EC
+	 *  Arg0 = EC field structure
+	 */
+	Method (R, 1, Serialized)
+	{
+		Return (ECRW (Arg0, Zero))
+	}
+
+	/*
+	 * Write value to a field from EC
+	 *  Arg0 = EC field structure
+	 *  Arg1 = Value to write
+	 */
+	Method (W, 2, Serialized)
+	{
+		Return (ECRW (Arg0, Arg1))
+	}
+
+	#include "ec_dev.asl"
+	#include "ec_ram.asl"
+	#include "lid.asl"
+	#include "platform.asl"
+}