1 files changed, 91 insertions, 0 deletions
diff --git a/src/mainboard/biostar/am1ml/acpi/sio.asl b/src/mainboard/biostar/am1ml/acpi/sio.asl
new file mode 100644
index 0000000000..e332979b0e
--- /dev/null
+++ b/src/mainboard/biostar/am1ml/acpi/sio.asl
@@ -0,0 +1,91 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 - 2012 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+OperationRegion (IOID, SystemIO, 0x2E, 0x02)
+Field (IOID, ByteAcc, NoLock, Preserve)
+{
+	SIOI,   8,    SIOD,   8		/* 0x2E and 0x2F */
+}
+
+IndexField (SIOI, SIOD, ByteAcc, NoLock, Preserve)
+{
+	Offset (0x07),
+	LDN,	8,	/* Logical Device Number */
+	Offset (0x20),
+	CID1,	8,	/* Chip ID Byte 1, 0x87 */
+	CID2,	8,	/* Chip ID Byte 2, 0x12 */
+	Offset (0x30),
+	ACTR,	8,	/* Function activate */
+	Offset (0xF0),
+	APC0,	8,	/* APC/PME Event Enable Register */
+	APC1,	8,	/* APC/PME Status Register */
+	APC2,	8,	/* APC/PME Control Register 1 */
+	APC3,	8,	/* Environment Controller Special Configuration Register */
+	APC4,	8	/* APC/PME Control Register 2 */
+}
+
+/* Enter the 8728 Config */
+Method (EPNP)
+{
+	Store(0x87, SIOI)
+	Store(0x01, SIOI)
+	Store(0x55, SIOI)
+	Store(0x55, SIOI)
+}
+
+/* Exit the 8728 Config */
+Method (XPNP)
+{
+	Store (0x02, SIOI)
+	Store (0x02, SIOD)
+}
+
+/*
+ * Keyboard PME is routed to SB700 Gevent3. We can wake
+ * up the system by pressing the key.
+ */
+Method (SIOS, 1)
+{
+	/* We only enable KBD PME for S5. */
+	If (LLess (Arg0, 0x05))
+	{
+		EPNP()
+		/* DBGO("8728F\n") */
+		Store (0x4, LDN)
+		Store (One, ACTR)  /* Enable EC */
+		/*
+		Store (0x4, LDN)
+		Store (0x04, APC4)
+		*/  /* falling edge. which mode? Not sure. */
+		Store (0x4, LDN)
+		Store (0x08, APC1) /* clear PME status, Use 0x18 for mouse & KBD */
+		Store (0x4, LDN)
+		Store (0x08, APC0) /* enable PME, Use 0x18 for mouse & KBD */
+		XPNP()
+	}
+}
+Method (SIOW, 1)
+{
+	EPNP()
+	Store (0x4, LDN)
+	Store (Zero, APC0) /* disable keyboard PME */
+	Store (0x4, LDN)
+	Store (0xFF, APC1) /* clear keyboard PME status */
+	XPNP()
+}