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/*
* Copyright 2017 NXP
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
******************************************************************************
* 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 an Audio 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 an Audio TX Instance. |
* | | | | | Same as above command | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x02 | Data[0]: Audio Device Index | Pause an Audio TX Instance. |
* | | | | | Same as above command | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x03 | Data[0]: Audio Device Index | Resume an Audio TX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x04 | Data[0]: Audio Device Index | Terminate an Audio TX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x05 | Data[0]: Audio Device Index | Close an Audio TX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x06 | Data[0]: Audio Device Index | Set Parameters for an Audio TX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x07 | Data[0]: Audio Device Index | Set Audio TX Buffer. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x08 | Data[0]: Audio Device Index | Open an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x09 | Data[0]: Audio Device Index | Start an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x0A | Data[0]: Audio Device Index | Pause an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x0B | Data[0]: Audio Device Index | Resume an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x0C | Data[0]: Audio Device Index | Terminate an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x0D | Data[0]: Audio Device Index | Close an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x0E | Data[0]: Audio Device Index | Set Parameters for an Audio RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x00 | 0x0F | Data[0]: Audio Device Index | Set Audio RX Buffer. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* 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 an Audio TX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x01 | Data[0]: Audio Device Index | Reply for Start an Audio TX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x02 | Data[0]: Audio Device Index | Reply for Pause an Audio TX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x03 | Data[0]: Audio Device Index | Reply for Resume an Audio TX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x04 | Data[0]: Audio Device Index | Reply for Terminate an Audio TX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x05 | Data[0]: Audio Device Index | Reply for Close an Audio TX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x06 | Data[0]: Audio Device Index | Reply for Set Parameters for an Audio |
* | | | | | Data[1]: Return code | TX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x07 | Data[0]: Audio Device Index | Reply for Set Audio TX Buffer. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x08 | Data[0]: Audio Device Index | Reply for Open an Audio RX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x09 | Data[0]: Audio Device Index | Reply for Start an Audio RX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x0A | Data[0]: Audio Device Index | Reply for Pause an Audio RX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x0B | Data[0]: Audio Device Index | Reply for Resume an Audio RX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x0C | Data[0]: Audio Device Index | Reply for Terminate an Audio RX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x0D | Data[0]: Audio Device Index | Reply for Close an Audio RX Instance. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x0E | Data[0]: Audio Device Index | Reply for Set Parameters for an Audio |
* | | | | | Data[1]: Return code | RX Instance. |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
* | 0x03 | 0x0100 | 0x01 | 0x0F | Data[0]: Audio Device Index | Reply for Set Audio RX Buffer. |
* | | | | | Data[1]: Return code | |
* +------------+---------+------+---------+-------------------------------+------------------------------------------------+
*
* 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 __FSL_RPMSG_I2S_H
#define __FSL_RPMSG_I2S_H
#include <linux/pm_qos.h>
#include <linux/imx_rpmsg.h>
#include <linux/interrupt.h>
#include <sound/dmaengine_pcm.h>
#define RPMSG_TIMEOUT 1000
#define I2S_TX_OPEN 0x0
#define I2S_TX_START 0x1
#define I2S_TX_PAUSE 0x2
#define I2S_TX_RESTART 0x3
#define I2S_TX_TERMINATE 0x4
#define I2S_TX_CLOSE 0x5
#define I2S_TX_HW_PARAM 0x6
#define I2S_TX_BUFFER 0x7
#define I2S_TX_SUSPEND 0x8
#define I2S_TX_RESUME 0x9
#define I2S_RX_OPEN 0xA
#define I2S_RX_START 0xB
#define I2S_RX_PAUSE 0xC
#define I2S_RX_RESTART 0xD
#define I2S_RX_TERMINATE 0xE
#define I2S_RX_CLOSE 0xF
#define I2S_RX_HW_PARAM 0x10
#define I2S_RX_BUFFER 0x11
#define I2S_RX_SUSPEND 0x12
#define I2S_RX_RESUME 0x13
#define WORK_MAX_NUM 0x14
#define I2S_TX_PERIOD_DONE 0x0
#define I2S_RX_PERIOD_DONE 0x1
#define I2S_TYPE_A 0x0
#define I2S_TYPE_B 0x1
#define I2S_TYPE_C 0x2
#define I2S_RESP_NONE 0x0
#define I2S_RESP_NOT_ALLOWED 0x1
#define I2S_RESP_SUCCESS 0x2
#define I2S_RESP_FAILED 0x3
#define RPMSG_S16_LE 0x0
#define RPMSG_S24_LE 0x1
#define RPMSG_CH_LEFT 0x0
#define RPMSG_CH_RIGHT 0x1
#define RPMSG_CH_STEREO 0x2
struct i2s_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 i2s_param_r {
unsigned char audioindex;
unsigned char resp;
} __packed;
/* struct of send message */
struct i2s_rpmsg_s {
struct imx_rpmsg_head header;
struct i2s_param_s param;
};
/* struct of received message */
struct i2s_rpmsg_r {
struct imx_rpmsg_head header;
struct i2s_param_r param;
};
struct work_of_rpmsg {
struct i2s_info *i2s_info;
/* sent msg for each work */
struct i2s_rpmsg_s msg;
struct work_struct work;
};
typedef void (*dma_callback)(void *arg);
struct i2s_info {
struct rpmsg_device *rpdev;
struct device *dev;
struct completion cmd_complete;
/* received msg */
struct i2s_rpmsg_r recv_msg;
/* backup sent msg */
struct i2s_rpmsg_s send_msg[2];
struct workqueue_struct *rpmsg_wq;
struct work_of_rpmsg work_list[WORK_MAX_NUM];
int work_index;
int num_period[2];
void *callback_param[2];
int (*send_message)(struct i2s_rpmsg_s *msg, struct i2s_info *info);
dma_callback callback[2];
spinlock_t lock[2];
struct mutex tx_lock;
};
struct fsl_rpmsg_i2s {
struct platform_device *pdev;
struct i2s_info i2s_info;
struct pm_qos_request pm_qos_req;
};
#endif /* __FSL_RPMSG_I2S_H */
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