Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 512 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-pcm-rpmsg.h b/sound/soc/fsl/imx-pcm-rpmsg.h
new file mode 100644
index 0000000000..8286b55f00
--- /dev/null
+++ b/sound/soc/fsl/imx-pcm-rpmsg.h
@@ -0,0 +1,512 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2017-2021  NXP
+ *
+ ******************************************************************************
+ * Communication stack of audio with rpmsg
+ ******************************************************************************
+ * Packet structure:
+ *   A SRTM message consists of a 10 bytes header followed by 0~N bytes of data
+ *
+ *   +---------------+-------------------------------+
+ *   |               |            Content            |
+ *   +---------------+-------------------------------+
+ *   |  Byte Offset  | 7   6   5   4   3   2   1   0 |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       0       |           Category            |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |     1 ~ 2     |           Version             |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       3       |             Type              |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       4       |           Command             |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       5       |           Reserved0           |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       6       |           Reserved1           |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       7       |           Reserved2           |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       8       |           Reserved3           |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       9       |           Reserved4           |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |       10      |            DATA 0             |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   :   :   :   :   :   :   :   :   :   :   :   :   :
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *   |   N + 10 - 1  |            DATA N-1           |
+ *   +---------------+---+---+---+---+---+---+---+---+
+ *
+ *   +----------+------------+------------------------------------------------+
+ *   |  Field   |    Byte    |                                                |
+ *   +----------+------------+------------------------------------------------+
+ *   | Category |     0      | The destination category.                      |
+ *   +----------+------------+------------------------------------------------+
+ *   | Version  |   1 ~ 2    | The category version of the sender of the      |
+ *   |          |            | packet.                                        |
+ *   |          |            | The first byte represent the major version of  |
+ *   |          |            | the packet.The second byte represent the minor |
+ *   |          |            | version of the packet.                         |
+ *   +----------+------------+------------------------------------------------+
+ *   |  Type    |     3      | The message type of current message packet.    |
+ *   +----------+------------+------------------------------------------------+
+ *   | Command  |     4      | The command byte sent to remote processor/SoC. |
+ *   +----------+------------+------------------------------------------------+
+ *   | Reserved |   5 ~ 9    | Reserved field for future extension.           |
+ *   +----------+------------+------------------------------------------------+
+ *   | Data     |     N      | The data payload of the message packet.        |
+ *   +----------+------------+------------------------------------------------+
+ *
+ * Audio control:
+ *   SRTM Audio Control Category Request Command Table:
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   | Category | Version | Type | Command | Data                          | Function              |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x00   | Data[0]: Audio Device Index   | Open a TX Instance.   |
+ *   |          |         |      |         | Data[1]:     format           |                       |
+ *   |          |         |      |         | Data[2]:     channels         |                       |
+ *   |          |         |      |         | Data[3-6]:   samplerate       |                       |
+ *   |          |         |      |         | Data[7-10]:  buffer_addr      |                       |
+ *   |          |         |      |         | Data[11-14]: buffer_size      |                       |
+ *   |          |         |      |         | Data[15-18]: period_size      |                       |
+ *   |          |         |      |         | Data[19-22]: buffer_tail      |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x01   | Data[0]: Audio Device Index   | Start a TX Instance.  |
+ *   |          |         |      |         | Same as above command         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x02   | Data[0]: Audio Device Index   | Pause a TX Instance.  |
+ *   |          |         |      |         | Same as above command         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x03   | Data[0]: Audio Device Index   | Resume a TX Instance. |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x04   | Data[0]: Audio Device Index   | Stop a TX Instance.   |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x05   | Data[0]: Audio Device Index   | Close a TX Instance.  |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x06   | Data[0]: Audio Device Index   | Set Parameters for    |
+ *   |          |         |      |         | Data[1]:     format           | a TX Instance.        |
+ *   |          |         |      |         | Data[2]:     channels         |                       |
+ *   |          |         |      |         | Data[3-6]:   samplerate       |                       |
+ *   |          |         |      |         | Data[7-22]:  reserved         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x07   | Data[0]: Audio Device Index   | Set TX Buffer.        |
+ *   |          |         |      |         | Data[1-6]:   reserved         |                       |
+ *   |          |         |      |         | Data[7-10]:  buffer_addr      |                       |
+ *   |          |         |      |         | Data[11-14]: buffer_size      |                       |
+ *   |          |         |      |         | Data[15-18]: period_size      |                       |
+ *   |          |         |      |         | Data[19-22]: buffer_tail      |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x08   | Data[0]: Audio Device Index   | Suspend a TX Instance |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x09   | Data[0]: Audio Device Index   | Resume a TX Instance. |
+ *   |          |         |      |         | Data[1]:     format           |                       |
+ *   |          |         |      |         | Data[2]:     channels         |                       |
+ *   |          |         |      |         | Data[3-6]:   samplerate       |                       |
+ *   |          |         |      |         | Data[7-10]:  buffer_addr      |                       |
+ *   |          |         |      |         | Data[11-14]: buffer_size      |                       |
+ *   |          |         |      |         | Data[15-18]: period_size      |                       |
+ *   |          |         |      |         | Data[19-22]: buffer_tail      |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x0A   | Data[0]: Audio Device Index   | Open a RX Instance.   |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x0B   | Data[0]: Audio Device Index   | Start a RX Instance.  |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x0C   | Data[0]: Audio Device Index   | Pause a RX Instance.  |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x0D   | Data[0]: Audio Device Index   | Resume a RX Instance. |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x0E   | Data[0]: Audio Device Index   | Stop a RX Instance.   |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x0F   | Data[0]: Audio Device Index   | Close a RX Instance.  |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x10   | Data[0]: Audio Device Index   | Set Parameters for    |
+ *   |          |         |      |         | Data[1]:     format           | a RX Instance.        |
+ *   |          |         |      |         | Data[2]:     channels         |                       |
+ *   |          |         |      |         | Data[3-6]:   samplerate       |                       |
+ *   |          |         |      |         | Data[7-22]:  reserved         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x11   | Data[0]: Audio Device Index   | Set RX Buffer.        |
+ *   |          |         |      |         | Data[1-6]:   reserved         |                       |
+ *   |          |         |      |         | Data[7-10]:  buffer_addr      |                       |
+ *   |          |         |      |         | Data[11-14]: buffer_size      |                       |
+ *   |          |         |      |         | Data[15-18]: period_size      |                       |
+ *   |          |         |      |         | Data[19-22]: buffer_tail      |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x12   | Data[0]: Audio Device Index   | Suspend a RX Instance.|
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x13   | Data[0]: Audio Device Index   | Resume a RX Instance. |
+ *   |          |         |      |         | Data[1]:     format           |                       |
+ *   |          |         |      |         | Data[2]:     channels         |                       |
+ *   |          |         |      |         | Data[3-6]:   samplerate       |                       |
+ *   |          |         |      |         | Data[7-10]:  buffer_addr      |                       |
+ *   |          |         |      |         | Data[11-14]: buffer_size      |                       |
+ *   |          |         |      |         | Data[15-18]: period_size      |                       |
+ *   |          |         |      |         | Data[19-22]: buffer_tail      |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x14   | Data[0]: Audio Device Index   | Set register value    |
+ *   |          |         |      |         | Data[1-6]:   reserved         | to codec              |
+ *   |          |         |      |         | Data[7-10]:  register         |                       |
+ *   |          |         |      |         | Data[11-14]: value            |                       |
+ *   |          |         |      |         | Data[15-22]: reserved         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x00 |  0x15   | Data[0]: Audio Device Index   | Get register value    |
+ *   |          |         |      |         | Data[1-6]:   reserved         | from codec            |
+ *   |          |         |      |         | Data[7-10]:  register         |                       |
+ *   |          |         |      |         | Data[11-22]: reserved         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   Note 1: See <List of Sample Format> for available value of
+ *           Sample Format;
+ *   Note 2: See <List of Audio Channels> for available value of Channels;
+ *   Note 3: Sample Rate of Set Parameters for an Audio TX Instance
+ *           Command and Set Parameters for an Audio RX Instance Command is
+ *           in little-endian format.
+ *
+ *   SRTM Audio Control Category Response Command Table:
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   | Category | Version | Type | Command | Data                          | Function              |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x00   | Data[0]: Audio Device Index   | Reply for Open        |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x01   | Data[0]: Audio Device Index   | Reply for Start       |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x02   | Data[0]: Audio Device Index   | Reply for Pause       |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x03   | Data[0]: Audio Device Index   | Reply for Resume      |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x04   | Data[0]: Audio Device Index   | Reply for Stop        |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x05   | Data[0]: Audio Device Index   | Reply for Close       |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x06   | Data[0]: Audio Device Index   | Reply for Set Param   |
+ *   |          |         |      |         | Data[1]: Return code          | for a TX Instance.    |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x07   | Data[0]: Audio Device Index   | Reply for Set         |
+ *   |          |         |      |         | Data[1]: Return code          | TX Buffer             |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x08   | Data[0]: Audio Device Index   | Reply for Suspend     |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x09   | Data[0]: Audio Device Index   | Reply for Resume      |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x0A   | Data[0]: Audio Device Index   | Reply for Open        |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x0B   | Data[0]: Audio Device Index   | Reply for Start       |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x0C   | Data[0]: Audio Device Index   | Reply for Pause       |
+ *   |          |         |      |         | Data[1]: Return code          | a TX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x0D   | Data[0]: Audio Device Index   | Reply for Resume      |
+ *   |          |         |      |         | Data[1]: Return code          | a RX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x0E   | Data[0]: Audio Device Index   | Reply for Stop        |
+ *   |          |         |      |         | Data[1]: Return code          | a RX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x0F   | Data[0]: Audio Device Index   | Reply for Close       |
+ *   |          |         |      |         | Data[1]: Return code          | a RX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x10   | Data[0]: Audio Device Index   | Reply for Set Param   |
+ *   |          |         |      |         | Data[1]: Return code          | for a RX Instance.    |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x11   | Data[0]: Audio Device Index   | Reply for Set         |
+ *   |          |         |      |         | Data[1]: Return code          | RX Buffer             |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x12   | Data[0]: Audio Device Index   | Reply for Suspend     |
+ *   |          |         |      |         | Data[1]: Return code          | a RX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x13   | Data[0]: Audio Device Index   | Reply for Resume      |
+ *   |          |         |      |         | Data[1]: Return code          | a RX Instance         |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x14   | Data[0]: Audio Device Index   | Reply for Set codec   |
+ *   |          |         |      |         | Data[1]: Return code          | register value        |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x01 |  0x15   | Data[0]: Audio Device Index   | Reply for Get codec   |
+ *   |          |         |      |         | Data[1]: Return code          | register value        |
+ *   |          |         |      |         | Data[2-6]:   reserved         |                       |
+ *   |          |         |      |         | Data[7-10]:  register         |                       |
+ *   |          |         |      |         | Data[11-14]: value            |                       |
+ *   |          |         |      |         | Data[15-22]: reserved         |                       |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *
+ *   SRTM Audio Control Category Notification Command Table:
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   | Category | Version | Type | Command | Data                          | Function              |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x02 |  0x00   | Data[0]: Audio Device Index   | Notify one TX period  |
+ *   |          |         |      |         |                               | is finished           |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *   |  0x03    | 0x0100  | 0x02 |  0x01   | Data[0]: Audio Device Index   | Notify one RX period  |
+ *   |          |         |      |         |                               | is finished           |
+ *   +----------+---------+------+---------+-------------------------------+-----------------------+
+ *
+ *   List of Sample Format:
+ *   +------------------+-----------------------+
+ *   | Sample Format    |   Description         |
+ *   +------------------+-----------------------+
+ *   |       0x0        | S16_LE                |
+ *   +------------------+-----------------------+
+ *   |       0x1        | S24_LE                |
+ *   +------------------+-----------------------+
+ *
+ *   List of Audio Channels
+ *   +------------------+-----------------------+
+ *   |  Audio Channel   |   Description         |
+ *   +------------------+-----------------------+
+ *   |       0x0        | Left Channel          |
+ *   +------------------+-----------------------+
+ *   |       0x1        | Right Channel         |
+ *   +------------------+---------------- ------+
+ *   |       0x2        | Left & Right Channel  |
+ *   +------------------+-----------------------+
+ *
+ */
+
+#ifndef _IMX_PCM_RPMSG_H
+#define _IMX_PCM_RPMSG_H
+
+#include <linux/pm_qos.h>
+#include <linux/interrupt.h>
+#include <sound/dmaengine_pcm.h>
+
+#define RPMSG_TIMEOUT 1000
+
+/* RPMSG Command (TYPE A)*/
+#define TX_OPEN		0x0
+#define	TX_START	0x1
+#define	TX_PAUSE	0x2
+#define	TX_RESTART	0x3
+#define	TX_TERMINATE	0x4
+#define	TX_CLOSE	0x5
+#define TX_HW_PARAM	0x6
+#define	TX_BUFFER	0x7
+#define	TX_SUSPEND	0x8
+#define	TX_RESUME	0x9
+
+#define	RX_OPEN		0xA
+#define	RX_START	0xB
+#define	RX_PAUSE	0xC
+#define	RX_RESTART	0xD
+#define	RX_TERMINATE	0xE
+#define	RX_CLOSE	0xF
+#define	RX_HW_PARAM	0x10
+#define	RX_BUFFER	0x11
+#define	RX_SUSPEND	0x12
+#define	RX_RESUME	0x13
+#define SET_CODEC_VALUE 0x14
+#define GET_CODEC_VALUE 0x15
+#define	TX_POINTER	0x16
+#define	RX_POINTER	0x17
+/* Total msg numver for type A */
+#define MSG_TYPE_A_NUM  0x18
+
+/* RPMSG Command (TYPE C)*/
+#define	TX_PERIOD_DONE	0x0
+#define	RX_PERIOD_DONE	0x1
+/* Total msg numver for type C */
+#define MSG_TYPE_C_NUM  0x2
+
+#define MSG_MAX_NUM     (MSG_TYPE_A_NUM + MSG_TYPE_C_NUM)
+
+#define MSG_TYPE_A	0x0
+#define MSG_TYPE_B	0x1
+#define MSG_TYPE_C	0x2
+
+#define RESP_NONE		0x0
+#define RESP_NOT_ALLOWED	0x1
+#define	RESP_SUCCESS		0x2
+#define	RESP_FAILED		0x3
+
+#define	RPMSG_S16_LE		0x0
+#define	RPMSG_S24_LE		0x1
+#define	RPMSG_S32_LE		0x2
+#define	RPMSG_DSD_U16_LE	49  /* SNDRV_PCM_FORMAT_DSD_U16_LE */
+#define	RPMSG_DSD_U24_LE	0x4
+#define	RPMSG_DSD_U32_LE	50  /* SNDRV_PCM_FORMAT_DSD_U32_LE */
+
+#define	RPMSG_CH_LEFT		0x0
+#define	RPMSG_CH_RIGHT		0x1
+#define	RPMSG_CH_STEREO		0x2
+
+#define WORK_MAX_NUM    0x30
+
+/* Category define */
+#define IMX_RMPSG_LIFECYCLE     1
+#define IMX_RPMSG_PMIC          2
+#define IMX_RPMSG_AUDIO         3
+#define IMX_RPMSG_KEY           4
+#define IMX_RPMSG_GPIO          5
+#define IMX_RPMSG_RTC           6
+#define IMX_RPMSG_SENSOR        7
+
+/* rpmsg version */
+#define IMX_RMPSG_MAJOR         1
+#define IMX_RMPSG_MINOR         0
+
+#define TX SNDRV_PCM_STREAM_PLAYBACK
+#define RX SNDRV_PCM_STREAM_CAPTURE
+
+/**
+ * struct rpmsg_head: rpmsg header structure
+ *
+ * @cate: category
+ * @major: major version
+ * @minor: minor version
+ * @type: message type (A/B/C)
+ * @cmd: message command
+ * @reserved: reserved space
+ */
+struct rpmsg_head {
+	u8 cate;
+	u8 major;
+	u8 minor;
+	u8 type;
+	u8 cmd;
+	u8 reserved[5];
+} __packed;
+
+/**
+ * struct param_s: sent rpmsg parameter
+ *
+ * @audioindex: audio instance index
+ * @format: audio format
+ * @channels: audio channel number
+ * @rate: sample rate
+ * @buffer_addr: dma buffer physical address or register for SET_CODEC_VALUE
+ * @buffer_size: dma buffer size or register value for SET_CODEC_VALUE
+ * @period_size: period size
+ * @buffer_tail: current period index
+ */
+struct param_s {
+	unsigned char audioindex;
+	unsigned char format;
+	unsigned char channels;
+	unsigned int  rate;
+	unsigned int  buffer_addr;
+	unsigned int  buffer_size;
+	unsigned int  period_size;
+	unsigned int  buffer_tail;
+} __packed;
+
+/**
+ * struct param_s: send rpmsg parameter
+ *
+ * @audioindex: audio instance index
+ * @resp: response value
+ * @reserved1: reserved space
+ * @buffer_offset: the consumed offset of buffer
+ * @reg_addr: register addr of codec
+ * @reg_data: register value of codec
+ * @reserved2: reserved space
+ * @buffer_tail: current period index
+ */
+struct param_r {
+	unsigned char audioindex;
+	unsigned char resp;
+	unsigned char reserved1[1];
+	unsigned int  buffer_offset;
+	unsigned int  reg_addr;
+	unsigned int  reg_data;
+	unsigned char reserved2[4];
+	unsigned int  buffer_tail;
+} __packed;
+
+/* Struct of sent message */
+struct rpmsg_s_msg {
+	struct rpmsg_head header;
+	struct param_s    param;
+};
+
+/* Struct of received message */
+struct rpmsg_r_msg {
+	struct rpmsg_head header;
+	struct param_r    param;
+};
+
+/* Struct of rpmsg */
+struct rpmsg_msg {
+	struct rpmsg_s_msg  s_msg;
+	struct rpmsg_r_msg  r_msg;
+};
+
+/* Struct of rpmsg for workqueue */
+struct work_of_rpmsg {
+	struct rpmsg_info   *info;
+	/* Sent msg for each work */
+	struct rpmsg_msg    msg;
+	struct work_struct  work;
+};
+
+/* Struct of timer */
+struct stream_timer {
+	struct timer_list   timer;
+	struct rpmsg_info   *info;
+	struct snd_pcm_substream *substream;
+};
+
+typedef void (*dma_callback)(void *arg);
+
+/**
+ * struct rpmsg_info: rpmsg audio information
+ *
+ * @rpdev: pointer of rpmsg_device
+ * @dev: pointer for imx_pcm_rpmsg device
+ * @cmd_complete: command is finished
+ * @pm_qos_req: request of pm qos
+ * @r_msg: received rpmsg
+ * @msg: array of rpmsg
+ * @notify: notification msg (type C) for TX & RX
+ * @notify_updated: notification flag for TX & RX
+ * @rpmsg_wq: rpmsg workqueue
+ * @work_list: array of work list for workqueue
+ * @work_write_index: write index of work list
+ * @work_read_index: read index of work list
+ * @msg_drop_count: counter of dropped msg for TX & RX
+ * @num_period: period number for TX & RX
+ * @callback_param: parameter for period elapse callback for TX & RX
+ * @callback: period elapse callback for TX & RX
+ * @send_message: function pointer for send message
+ * @lock: spin lock for TX & RX
+ * @wq_lock: lock for work queue
+ * @msg_lock: lock for send message
+ * @stream_timer: timer for tigger workqueue
+ */
+struct rpmsg_info {
+	struct rpmsg_device      *rpdev;
+	struct device            *dev;
+	struct completion        cmd_complete;
+	struct pm_qos_request    pm_qos_req;
+
+	/* Received msg (global) */
+	struct rpmsg_r_msg       r_msg;
+	struct rpmsg_msg         msg[MSG_MAX_NUM];
+	/* period done */
+	struct rpmsg_msg         notify[2];
+	bool                     notify_updated[2];
+
+	struct workqueue_struct  *rpmsg_wq;
+	struct work_of_rpmsg	 work_list[WORK_MAX_NUM];
+	int                      work_write_index;
+	int                      work_read_index;
+	int                      msg_drop_count[2];
+	int                      num_period[2];
+	void                     *callback_param[2];
+	dma_callback             callback[2];
+	int (*send_message)(struct rpmsg_msg *msg, struct rpmsg_info *info);
+	spinlock_t               lock[2]; /* spin lock for resource protection */
+	spinlock_t               wq_lock; /* spin lock for resource protection */
+	struct mutex             msg_lock; /* mutex for resource protection */
+	struct stream_timer      stream_timer[2];
+};
+
+#define IMX_PCM_DRV_NAME "imx_pcm_rpmsg"
+
+#endif /* IMX_PCM_RPMSG_H */