ASoC: SOF: Add support for IPC IO between DSP and Host
Define an IPC ABI for all host <--> DSP communication. This ABI should
be transport agnostic. i.e. it should work on MMIO and SPI/I2C style
interfaces.
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/sof/header.h b/include/sound/sof/header.h
new file mode 100644
index 0000000..ccb6a00
--- /dev/null
+++ b/include/sound/sof/header.h
@@ -0,0 +1,158 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) 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) 2018 Intel Corporation. All rights reserved.
+ */
+
+#ifndef __INCLUDE_SOUND_SOF_HEADER_H__
+#define __INCLUDE_SOUND_SOF_HEADER_H__
+
+#include <uapi/sound/sof/abi.h>
+
+/** \addtogroup sof_uapi uAPI
+ * SOF uAPI specification.
+ * @{
+ */
+
+/*
+ * IPC messages have a prefixed 32 bit identifier made up as follows :-
+ *
+ * 0xGCCCNNNN where
+ * G is global cmd type (4 bits)
+ * C is command type (12 bits)
+ * I is the ID number (16 bits) - monotonic and overflows
+ *
+ * This is sent at the start of the IPM message in the mailbox. Messages should
+ * not be sent in the doorbell (special exceptions for firmware .
+ */
+
+/* Global Message - Generic */
+#define SOF_GLB_TYPE_SHIFT 28
+#define SOF_GLB_TYPE_MASK (0xf << SOF_GLB_TYPE_SHIFT)
+#define SOF_GLB_TYPE(x) ((x) << SOF_GLB_TYPE_SHIFT)
+
+/* Command Message - Generic */
+#define SOF_CMD_TYPE_SHIFT 16
+#define SOF_CMD_TYPE_MASK (0xfff << SOF_CMD_TYPE_SHIFT)
+#define SOF_CMD_TYPE(x) ((x) << SOF_CMD_TYPE_SHIFT)
+
+/* Global Message Types */
+#define SOF_IPC_GLB_REPLY SOF_GLB_TYPE(0x1U)
+#define SOF_IPC_GLB_COMPOUND SOF_GLB_TYPE(0x2U)
+#define SOF_IPC_GLB_TPLG_MSG SOF_GLB_TYPE(0x3U)
+#define SOF_IPC_GLB_PM_MSG SOF_GLB_TYPE(0x4U)
+#define SOF_IPC_GLB_COMP_MSG SOF_GLB_TYPE(0x5U)
+#define SOF_IPC_GLB_STREAM_MSG SOF_GLB_TYPE(0x6U)
+#define SOF_IPC_FW_READY SOF_GLB_TYPE(0x7U)
+#define SOF_IPC_GLB_DAI_MSG SOF_GLB_TYPE(0x8U)
+#define SOF_IPC_GLB_TRACE_MSG SOF_GLB_TYPE(0x9U)
+
+/*
+ * DSP Command Message Types
+ */
+
+/* topology */
+#define SOF_IPC_TPLG_COMP_NEW SOF_CMD_TYPE(0x001)
+#define SOF_IPC_TPLG_COMP_FREE SOF_CMD_TYPE(0x002)
+#define SOF_IPC_TPLG_COMP_CONNECT SOF_CMD_TYPE(0x003)
+#define SOF_IPC_TPLG_PIPE_NEW SOF_CMD_TYPE(0x010)
+#define SOF_IPC_TPLG_PIPE_FREE SOF_CMD_TYPE(0x011)
+#define SOF_IPC_TPLG_PIPE_CONNECT SOF_CMD_TYPE(0x012)
+#define SOF_IPC_TPLG_PIPE_COMPLETE SOF_CMD_TYPE(0x013)
+#define SOF_IPC_TPLG_BUFFER_NEW SOF_CMD_TYPE(0x020)
+#define SOF_IPC_TPLG_BUFFER_FREE SOF_CMD_TYPE(0x021)
+
+/* PM */
+#define SOF_IPC_PM_CTX_SAVE SOF_CMD_TYPE(0x001)
+#define SOF_IPC_PM_CTX_RESTORE SOF_CMD_TYPE(0x002)
+#define SOF_IPC_PM_CTX_SIZE SOF_CMD_TYPE(0x003)
+#define SOF_IPC_PM_CLK_SET SOF_CMD_TYPE(0x004)
+#define SOF_IPC_PM_CLK_GET SOF_CMD_TYPE(0x005)
+#define SOF_IPC_PM_CLK_REQ SOF_CMD_TYPE(0x006)
+#define SOF_IPC_PM_CORE_ENABLE SOF_CMD_TYPE(0x007)
+
+/* component runtime config - multiple different types */
+#define SOF_IPC_COMP_SET_VALUE SOF_CMD_TYPE(0x001)
+#define SOF_IPC_COMP_GET_VALUE SOF_CMD_TYPE(0x002)
+#define SOF_IPC_COMP_SET_DATA SOF_CMD_TYPE(0x003)
+#define SOF_IPC_COMP_GET_DATA SOF_CMD_TYPE(0x004)
+
+/* DAI messages */
+#define SOF_IPC_DAI_CONFIG SOF_CMD_TYPE(0x001)
+#define SOF_IPC_DAI_LOOPBACK SOF_CMD_TYPE(0x002)
+
+/* stream */
+#define SOF_IPC_STREAM_PCM_PARAMS SOF_CMD_TYPE(0x001)
+#define SOF_IPC_STREAM_PCM_PARAMS_REPLY SOF_CMD_TYPE(0x002)
+#define SOF_IPC_STREAM_PCM_FREE SOF_CMD_TYPE(0x003)
+#define SOF_IPC_STREAM_TRIG_START SOF_CMD_TYPE(0x004)
+#define SOF_IPC_STREAM_TRIG_STOP SOF_CMD_TYPE(0x005)
+#define SOF_IPC_STREAM_TRIG_PAUSE SOF_CMD_TYPE(0x006)
+#define SOF_IPC_STREAM_TRIG_RELEASE SOF_CMD_TYPE(0x007)
+#define SOF_IPC_STREAM_TRIG_DRAIN SOF_CMD_TYPE(0x008)
+#define SOF_IPC_STREAM_TRIG_XRUN SOF_CMD_TYPE(0x009)
+#define SOF_IPC_STREAM_POSITION SOF_CMD_TYPE(0x00a)
+#define SOF_IPC_STREAM_VORBIS_PARAMS SOF_CMD_TYPE(0x010)
+#define SOF_IPC_STREAM_VORBIS_FREE SOF_CMD_TYPE(0x011)
+
+/* trace and debug */
+#define SOF_IPC_TRACE_DMA_PARAMS SOF_CMD_TYPE(0x001)
+#define SOF_IPC_TRACE_DMA_POSITION SOF_CMD_TYPE(0x002)
+
+/* Get message component id */
+#define SOF_IPC_MESSAGE_ID(x) ((x) & 0xffff)
+
+/* maximum message size for mailbox Tx/Rx */
+#define SOF_IPC_MSG_MAX_SIZE 384
+
+/*
+ * Structure Header - Header for all IPC structures except command structs.
+ * The size can be greater than the structure size and that means there is
+ * extended bespoke data beyond the end of the structure including variable
+ * arrays.
+ */
+
+struct sof_ipc_hdr {
+ uint32_t size; /**< size of structure */
+} __packed;
+
+/*
+ * Command Header - Header for all IPC commands. Identifies IPC message.
+ * The size can be greater than the structure size and that means there is
+ * extended bespoke data beyond the end of the structure including variable
+ * arrays.
+ */
+
+struct sof_ipc_cmd_hdr {
+ uint32_t size; /**< size of structure */
+ uint32_t cmd; /**< SOF_IPC_GLB_ + cmd */
+} __packed;
+
+/*
+ * Generic reply message. Some commands override this with their own reply
+ * types that must include this at start.
+ */
+struct sof_ipc_reply {
+ struct sof_ipc_cmd_hdr hdr;
+ int32_t error; /**< negative error numbers */
+} __packed;
+
+/*
+ * Compound commands - SOF_IPC_GLB_COMPOUND.
+ *
+ * Compound commands are sent to the DSP as a single IPC operation. The
+ * commands are split into blocks and each block has a header. This header
+ * identifies the command type and the number of commands before the next
+ * header.
+ */
+
+struct sof_ipc_compound_hdr {
+ struct sof_ipc_cmd_hdr hdr;
+ uint32_t count; /**< count of 0 means end of compound sequence */
+} __packed;
+
+/** @}*/
+
+#endif