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-rw-r--r--src/soc/amd/stoneyridge/acpi/AmdImc.asl64
-rw-r--r--src/soc/amd/stoneyridge/acpi/fch.asl4
2 files changed, 67 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/acpi/AmdImc.asl b/src/soc/amd/stoneyridge/acpi/AmdImc.asl
new file mode 100644
index 0000000000..519b05cf37
--- /dev/null
+++ b/src/soc/amd/stoneyridge/acpi/AmdImc.asl
@@ -0,0 +1,64 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 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.
+ */
+
+//BTDC Due to IMC Fan, ACPI control codes
+OperationRegion(IMIO, SystemIO, 0x3E, 0x02)
+Field(IMIO , ByteAcc, NoLock, Preserve) {
+ IMCX,8,
+ IMCA,8
+}
+
+IndexField(IMCX, IMCA, ByteAcc, NoLock, Preserve) {
+ Offset(0x80),
+ MSTI, 8,
+ MITS, 8,
+ MRG0, 8,
+ MRG1, 8,
+ MRG2, 8,
+ MRG3, 8,
+}
+
+Method(WACK, 0)
+{
+ Store(0, Local0)
+ While (LNotEqual(Local0, 0xFA)) {
+ Store(MRG0, Local0)
+ Sleep(10)
+ }
+}
+
+//Init
+Method (ITZE, 0)
+{
+ Store(0, MRG0)
+ Store(0xB5, MRG1)
+ Store(0, MRG2)
+ Store(0x96, MSTI)
+ WACK()
+
+ Store(0, MRG0)
+ Store(0, MRG1)
+ Store(0, MRG2)
+ Store(0x80, MSTI)
+ WACK()
+
+ Or(MRG2, 0x01, Local0)
+
+ Store(0, MRG0)
+ Store(0, MRG1)
+ Store(Local0, MRG2)
+ Store(0x81, MSTI)
+ WACK()
+}
diff --git a/src/soc/amd/stoneyridge/acpi/fch.asl b/src/soc/amd/stoneyridge/acpi/fch.asl
index 6a815b33ff..6dcafe6faf 100644
--- a/src/soc/amd/stoneyridge/acpi/fch.asl
+++ b/src/soc/amd/stoneyridge/acpi/fch.asl
@@ -155,11 +155,13 @@ Method(_INI, 0) {
/* Determine the OS we're running on */
OSFL()
-#if IS_ENABLED(CONFIG_ACPI_ENABLE_THERMAL_ZONE)
+#if IS_ENABLED(CONFIG_STONEYRIDGE_IMC_FWM)
/* TODO: It is unstable. */
#include "acpi/AmdImc.asl"
+#if IS_ENABLED(CONFIG_ACPI_ENABLE_THERMAL_ZONE)
ITZE() /* enable IMC Fan Control*/
#endif
+#endif
} /* End Method(_SB._INI) */
Method(OSFL, 0){