--- /dev/null
+/*
+ * Freescale ALSA SoC rpmsg i2s driver.
+ *
+ * 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 as published by the
+ * Free Software Foundation, either version 2 of the License, or(at your
+ * option) any later version.
+ *
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/pm_runtime.h>
+#include <linux/rpmsg.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+
+#include "fsl_rpmsg_i2s.h"
+#include "imx-pcm.h"
+
+#define FSL_RPMSG_I2S_RATES SNDRV_PCM_RATE_8000_96000
+#define FSL_RPMSG_I2S_FORMATS SNDRV_PCM_FMTBIT_S16_LE
+
+static int i2s_send_message(struct i2s_rpmsg_s *msg,
+ struct i2s_info *info)
+{
+ int err;
+
+ mutex_lock(&info->tx_lock);
+ if (!info->rpdev) {
+ dev_dbg(info->dev, "rpmsg channel not ready, m4 image ready?\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(&info->rpdev->dev, "send cmd %d\n", msg->header.cmd);
+
+ reinit_completion(&info->cmd_complete);
+ err = rpmsg_send(info->rpdev->ept, (void *)msg,
+ sizeof(struct i2s_rpmsg_s));
+ if (err) {
+ dev_err(&info->rpdev->dev, "rpmsg_send failed: %d\n", err);
+ return err;
+ }
+
+ /* wait response from rpmsg */
+ err = wait_for_completion_timeout(&info->cmd_complete,
+ msecs_to_jiffies(RPMSG_TIMEOUT));
+ if (!err) {
+ dev_err(&info->rpdev->dev, "rpmsg_send cmd %d timeout!\n",
+ msg->header.cmd);
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(&info->rpdev->dev, "cmd:%d, resp %d\n", msg->header.cmd,
+ info->recv_msg.param.resp);
+ mutex_unlock(&info->tx_lock);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver fsl_rpmsg_i2s_dai = {
+ .playback = {
+ .stream_name = "CPU-Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = FSL_RPMSG_I2S_RATES,
+ .formats = FSL_RPMSG_I2S_FORMATS,
+ },
+ .capture = {
+ .stream_name = "CPU-Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = FSL_RPMSG_I2S_RATES,
+ .formats = FSL_RPMSG_I2S_FORMATS,
+ },
+ .symmetric_rates = 1,
+ .symmetric_channels = 1,
+ .symmetric_samplebits = 1,
+};
+
+static const struct snd_soc_component_driver fsl_component = {
+ .name = "fsl-rpmsg-i2s",
+};
+
+static const struct of_device_id fsl_rpmsg_i2s_ids[] = {
+ { .compatible = "fsl,imx7ulp-rpmsg-i2s"},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_rpmsg_i2s_ids);
+
+static void rpmsg_i2s_work(struct work_struct *work)
+{
+ struct work_of_rpmsg *work_of_rpmsg;
+ struct i2s_info *i2s_info;
+
+ work_of_rpmsg = container_of(work, struct work_of_rpmsg, work);
+ i2s_info = work_of_rpmsg->i2s_info;
+
+ i2s_send_message(&work_of_rpmsg->msg, i2s_info);
+}
+
+static int fsl_rpmsg_i2s_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_rpmsg_i2s *rpmsg_i2s;
+ struct i2s_info *i2s_info;
+ int audioindex = 0;
+ int ret;
+ int i;
+
+ rpmsg_i2s = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg_i2s),
+ GFP_KERNEL);
+ if (!rpmsg_i2s)
+ return -ENOMEM;
+
+ rpmsg_i2s->pdev = pdev;
+ i2s_info = &rpmsg_i2s->i2s_info;
+
+ ret = of_property_read_u32(np, "fsl,audioindex", &audioindex);
+ if (ret)
+ audioindex = 0;
+
+ /* Setup work queue */
+ i2s_info->rpmsg_wq = create_singlethread_workqueue("rpmsg_i2s");
+ if (i2s_info->rpmsg_wq == NULL) {
+ dev_err(&pdev->dev, "workqueue create failed\n");
+ return -ENOMEM;
+ }
+
+ i2s_info->send_message = i2s_send_message;
+
+ for (i = 0; i < WORK_MAX_NUM; i++) {
+ INIT_WORK(&i2s_info->work_list[i].work, rpmsg_i2s_work);
+ i2s_info->work_list[i].i2s_info = i2s_info;
+ }
+
+ for (i = 0; i < 2; i++) {
+ i2s_info->send_msg[i].header.cate = IMX_RPMSG_AUDIO;
+ i2s_info->send_msg[i].header.major = IMX_RMPSG_MAJOR;
+ i2s_info->send_msg[i].header.minor = IMX_RMPSG_MINOR;
+ i2s_info->send_msg[i].header.type = I2S_TYPE_A;
+ i2s_info->send_msg[i].param.audioindex = audioindex;
+ }
+
+ mutex_init(&i2s_info->tx_lock);
+
+ platform_set_drvdata(pdev, rpmsg_i2s);
+ pm_runtime_enable(&pdev->dev);
+
+ ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
+ &fsl_rpmsg_i2s_dai, 1);
+ if (ret)
+ return ret;
+
+ return imx_rpmsg_platform_register(&pdev->dev);
+}
+
+static int fsl_rpmsg_i2s_remove(struct platform_device *pdev)
+{
+ struct fsl_rpmsg_i2s *rpmsg_i2s = platform_get_drvdata(pdev);
+ struct i2s_info *i2s_info = &rpmsg_i2s->i2s_info;
+
+ if (i2s_info->rpmsg_wq)
+ destroy_workqueue(i2s_info->rpmsg_wq);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int fsl_rpmsg_i2s_runtime_resume(struct device *dev)
+{
+ return 0;
+}
+
+static int fsl_rpmsg_i2s_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int fsl_rpmsg_i2s_suspend(struct device *dev)
+{
+ struct fsl_rpmsg_i2s *rpmsg_i2s = dev_get_drvdata(dev);
+ struct i2s_info *i2s_info = &rpmsg_i2s->i2s_info;
+ struct i2s_rpmsg_s *rpmsg_tx;
+ struct i2s_rpmsg_s *rpmsg_rx;
+
+ rpmsg_tx = &i2s_info->send_msg[SNDRV_PCM_STREAM_PLAYBACK];
+ rpmsg_rx = &i2s_info->send_msg[SNDRV_PCM_STREAM_CAPTURE];
+
+ rpmsg_tx->header.cmd = I2S_TX_SUSPEND;
+ i2s_send_message(rpmsg_tx, i2s_info);
+
+ rpmsg_tx->header.cmd = I2S_RX_SUSPEND;
+ i2s_send_message(rpmsg_rx, i2s_info);
+
+ return 0;
+}
+
+static int fsl_rpmsg_i2s_resume(struct device *dev)
+{
+ struct fsl_rpmsg_i2s *rpmsg_i2s = dev_get_drvdata(dev);
+ struct i2s_info *i2s_info = &rpmsg_i2s->i2s_info;
+ struct i2s_rpmsg_s *rpmsg_tx;
+ struct i2s_rpmsg_s *rpmsg_rx;
+
+ rpmsg_tx = &i2s_info->send_msg[SNDRV_PCM_STREAM_PLAYBACK];
+ rpmsg_rx = &i2s_info->send_msg[SNDRV_PCM_STREAM_CAPTURE];
+
+ rpmsg_tx->header.cmd = I2S_TX_RESUME;
+ i2s_send_message(rpmsg_tx, i2s_info);
+
+ rpmsg_tx->header.cmd = I2S_RX_RESUME;
+ i2s_send_message(rpmsg_rx, i2s_info);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops fsl_rpmsg_i2s_pm_ops = {
+ SET_RUNTIME_PM_OPS(fsl_rpmsg_i2s_runtime_suspend,
+ fsl_rpmsg_i2s_runtime_resume,
+ NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(fsl_rpmsg_i2s_suspend, fsl_rpmsg_i2s_resume)
+};
+
+static struct platform_driver fsl_rpmsg_i2s_driver = {
+ .probe = fsl_rpmsg_i2s_probe,
+ .remove = fsl_rpmsg_i2s_remove,
+ .driver = {
+ .name = "fsl-rpmsg-i2s",
+ .pm = &fsl_rpmsg_i2s_pm_ops,
+ .of_match_table = fsl_rpmsg_i2s_ids,
+ },
+};
+
+module_platform_driver(fsl_rpmsg_i2s_driver);
+
+MODULE_DESCRIPTION("Freescale Soc rpmsg_i2s Interface");
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@freescale.com>");
+MODULE_ALIAS("platform:fsl-rpmsg_i2s");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * 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
+
+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 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;
+};
+
+#endif /* __FSL_RPMSG_I2S_H */
projects / linux.git / commitdiff