[alsa-devel] [PATCH 15/26] ASoC: SOF: Intel: HDA: add cAVS specific compact IPC header file

[Pierre-Louis Bossart]

From: Keyon Jie <yang.jie at linux.intel.com>

On cAVS platforms, some IPCs are required to be sent via IPC registers
only(e.g. when in D0i3, mailbox is unaccessible), add hda-ipc.h to hold
definition of those compact IPCs.

Signed-off-by: Keyon Jie <yang.jie at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/intel/hda-ipc.h | 51 +++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 sound/soc/sof/intel/hda-ipc.h

diff --git a/sound/soc/sof/intel/hda-ipc.h b/sound/soc/sof/intel/hda-ipc.h
new file mode 100644
index 000000000000..aef0ceac9803
--- /dev/null
+++ b/sound/soc/sof/intel/hda-ipc.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Copyright(c) 2019 Intel Corporation. All rights reserved.
+ *
+ * Author: Keyon Jie <yang.jie at linux.intel.com>
+ */
+
+#ifndef __SOF_INTEL_HDA_IPC_H
+#define __SOF_INTEL_HDA_IPC_H
+
+/*
+ * Primary register, mapped to
+ * - DIPCTDR (HIPCIDR) in sideband IPC (cAVS 1.8+)
+ * - DIPCT in cAVS 1.5 IPC
+ *
+ * Secondary register, mapped to:
+ * - DIPCTDD (HIPCIDD) in sideband IPC (cAVS 1.8+)
+ * - DIPCTE in cAVS 1.5 IPC
+ */
+
+/* Common bits in primary register */
+
+/* Reserved for doorbell */
+#define HDA_IPC_RSVD_31		BIT(31)
+/* Target, 0 - normal message, 1 - compact message(cAVS compatible) */
+#define HDA_IPC_MSG_COMPACT	BIT(30)
+/* Direction, 0 - request, 1 - response */
+#define HDA_IPC_RSP		BIT(29)
+
+#define HDA_IPC_TYPE_SHIFT	24
+#define HDA_IPC_TYPE_MASK	GENMASK(28, 24)
+#define HDA_IPC_TYPE(x)		((x) << HDA_IPC_TYPE_SHIFT)
+
+#define HDA_IPC_PM_GATE		HDA_IPC_TYPE(0x8U)
+
+/* Command specific payload bits in secondary register */
+
+/* Disable DMA tracing (0 - keep tracing, 1 - to disable DMA trace) */
+#define HDA_PM_NO_DMA_TRACE	BIT(4)
+/* Prevent clock gating (0 - cg allowed, 1 - DSP clock always on) */
+#define HDA_PM_PCG		BIT(3)
+/* Prevent power gating (0 - deep power state transitions allowed) */
+#define HDA_PM_PPG		BIT(2)
+/* Indicates whether streaming is active */
+#define HDA_PM_PG_STREAMING	BIT(1)
+#define HDA_PM_PG_RSVD		BIT(0)
+
+#endif
-- 
2.20.1