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/* 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 */
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