835 lines
23 KiB
C
835 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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// Copyright 2017-2021 NXP
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/rpmsg.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/soc.h>
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#include "imx-pcm.h"
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#include "fsl_rpmsg.h"
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#include "imx-pcm-rpmsg.h"
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static struct snd_pcm_hardware imx_rpmsg_pcm_hardware = {
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.info = SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_RESUME,
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.buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE,
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.period_bytes_min = 512,
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.period_bytes_max = 65536,
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.periods_min = 2,
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.periods_max = 6000,
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.fifo_size = 0,
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};
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static int imx_rpmsg_pcm_send_message(struct rpmsg_msg *msg,
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struct rpmsg_info *info)
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{
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struct rpmsg_device *rpdev = info->rpdev;
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int ret = 0;
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mutex_lock(&info->msg_lock);
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if (!rpdev) {
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dev_err(info->dev, "rpmsg channel not ready\n");
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mutex_unlock(&info->msg_lock);
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return -EINVAL;
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}
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dev_dbg(&rpdev->dev, "send cmd %d\n", msg->s_msg.header.cmd);
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if (!(msg->s_msg.header.type == MSG_TYPE_C))
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reinit_completion(&info->cmd_complete);
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ret = rpmsg_send(rpdev->ept, (void *)&msg->s_msg,
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sizeof(struct rpmsg_s_msg));
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if (ret) {
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dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
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mutex_unlock(&info->msg_lock);
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return ret;
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}
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/* No receive msg for TYPE_C command */
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if (msg->s_msg.header.type == MSG_TYPE_C) {
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mutex_unlock(&info->msg_lock);
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return 0;
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}
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/* wait response from rpmsg */
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ret = wait_for_completion_timeout(&info->cmd_complete,
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msecs_to_jiffies(RPMSG_TIMEOUT));
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if (!ret) {
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dev_err(&rpdev->dev, "rpmsg_send cmd %d timeout!\n",
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msg->s_msg.header.cmd);
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mutex_unlock(&info->msg_lock);
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return -ETIMEDOUT;
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}
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memcpy(&msg->r_msg, &info->r_msg, sizeof(struct rpmsg_r_msg));
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memcpy(&info->msg[msg->r_msg.header.cmd].r_msg,
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&msg->r_msg, sizeof(struct rpmsg_r_msg));
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/*
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* Reset the buffer pointer to be zero, actully we have
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* set the buffer pointer to be zero in imx_rpmsg_terminate_all
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* But if there is timer task queued in queue, after it is
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* executed the buffer pointer will be changed, so need to
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* reset it again with TERMINATE command.
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*/
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switch (msg->s_msg.header.cmd) {
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case TX_TERMINATE:
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info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
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break;
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case RX_TERMINATE:
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info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
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break;
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default:
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break;
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}
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dev_dbg(&rpdev->dev, "cmd:%d, resp %d\n", msg->s_msg.header.cmd,
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info->r_msg.param.resp);
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mutex_unlock(&info->msg_lock);
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return 0;
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}
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static int imx_rpmsg_insert_workqueue(struct snd_pcm_substream *substream,
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struct rpmsg_msg *msg,
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struct rpmsg_info *info)
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{
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unsigned long flags;
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int ret = 0;
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/*
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* Queue the work to workqueue.
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* If the queue is full, drop the message.
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*/
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spin_lock_irqsave(&info->wq_lock, flags);
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if (info->work_write_index != info->work_read_index) {
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int index = info->work_write_index;
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memcpy(&info->work_list[index].msg, msg,
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sizeof(struct rpmsg_s_msg));
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queue_work(info->rpmsg_wq, &info->work_list[index].work);
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info->work_write_index++;
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info->work_write_index %= WORK_MAX_NUM;
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} else {
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info->msg_drop_count[substream->stream]++;
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ret = -EPIPE;
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}
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spin_unlock_irqrestore(&info->wq_lock, flags);
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return ret;
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}
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static int imx_rpmsg_pcm_hw_params(struct snd_soc_component *component,
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struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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int ret = 0;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_HW_PARAM];
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msg->s_msg.header.cmd = TX_HW_PARAM;
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} else {
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msg = &info->msg[RX_HW_PARAM];
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msg->s_msg.header.cmd = RX_HW_PARAM;
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}
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msg->s_msg.param.rate = params_rate(params);
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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msg->s_msg.param.format = RPMSG_S16_LE;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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msg->s_msg.param.format = RPMSG_S24_LE;
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break;
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case SNDRV_PCM_FORMAT_DSD_U16_LE:
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msg->s_msg.param.format = RPMSG_DSD_U16_LE;
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break;
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case SNDRV_PCM_FORMAT_DSD_U32_LE:
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msg->s_msg.param.format = RPMSG_DSD_U32_LE;
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break;
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default:
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msg->s_msg.param.format = RPMSG_S32_LE;
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break;
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}
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switch (params_channels(params)) {
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case 1:
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msg->s_msg.param.channels = RPMSG_CH_LEFT;
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break;
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case 2:
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msg->s_msg.param.channels = RPMSG_CH_STEREO;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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info->send_message(msg, info);
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return ret;
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}
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static snd_pcm_uframes_t imx_rpmsg_pcm_pointer(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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unsigned int pos = 0;
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int buffer_tail = 0;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
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else
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msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
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buffer_tail = msg->r_msg.param.buffer_tail;
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pos = buffer_tail * snd_pcm_lib_period_bytes(substream);
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return bytes_to_frames(substream->runtime, pos);
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}
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static void imx_rpmsg_timer_callback(struct timer_list *t)
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{
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struct stream_timer *stream_timer =
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from_timer(stream_timer, t, timer);
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struct snd_pcm_substream *substream = stream_timer->substream;
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struct rpmsg_info *info = stream_timer->info;
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struct rpmsg_msg *msg;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
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msg->s_msg.header.cmd = TX_PERIOD_DONE;
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} else {
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msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
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msg->s_msg.header.cmd = RX_PERIOD_DONE;
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}
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imx_rpmsg_insert_workqueue(substream, msg, info);
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}
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static int imx_rpmsg_pcm_open(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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int ret = 0;
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int cmd;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_OPEN];
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msg->s_msg.header.cmd = TX_OPEN;
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/* reinitialize buffer counter*/
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cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM;
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info->msg[cmd].s_msg.param.buffer_tail = 0;
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info->msg[cmd].r_msg.param.buffer_tail = 0;
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info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
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} else {
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msg = &info->msg[RX_OPEN];
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msg->s_msg.header.cmd = RX_OPEN;
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/* reinitialize buffer counter*/
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cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM;
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info->msg[cmd].s_msg.param.buffer_tail = 0;
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info->msg[cmd].r_msg.param.buffer_tail = 0;
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info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
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}
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info->send_message(msg, info);
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imx_rpmsg_pcm_hardware.period_bytes_max =
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imx_rpmsg_pcm_hardware.buffer_bytes_max / 2;
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snd_soc_set_runtime_hwparams(substream, &imx_rpmsg_pcm_hardware);
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ret = snd_pcm_hw_constraint_integer(substream->runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0)
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return ret;
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info->msg_drop_count[substream->stream] = 0;
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/* Create timer*/
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info->stream_timer[substream->stream].info = info;
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info->stream_timer[substream->stream].substream = substream;
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timer_setup(&info->stream_timer[substream->stream].timer,
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imx_rpmsg_timer_callback, 0);
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return ret;
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}
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static int imx_rpmsg_pcm_close(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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int ret = 0;
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/* Flush work in workqueue to make TX_CLOSE is the last message */
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flush_workqueue(info->rpmsg_wq);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_CLOSE];
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msg->s_msg.header.cmd = TX_CLOSE;
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} else {
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msg = &info->msg[RX_CLOSE];
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msg->s_msg.header.cmd = RX_CLOSE;
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}
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info->send_message(msg, info);
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del_timer(&info->stream_timer[substream->stream].timer);
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rtd->dai_link->ignore_suspend = 0;
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if (info->msg_drop_count[substream->stream])
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dev_warn(rtd->dev, "Msg is dropped!, number is %d\n",
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info->msg_drop_count[substream->stream]);
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return ret;
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}
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static int imx_rpmsg_pcm_prepare(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
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/*
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* NON-MMAP mode, NONBLOCK, Version 2, enable lpa in dts
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* four conditions to determine the lpa is enabled.
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*/
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if ((runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
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runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) &&
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rpmsg->enable_lpa) {
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/*
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* Ignore suspend operation in low power mode
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* M core will continue playback music on A core suspend.
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*/
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rtd->dai_link->ignore_suspend = 1;
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rpmsg->force_lpa = 1;
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} else {
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rpmsg->force_lpa = 0;
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}
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return 0;
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}
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static void imx_rpmsg_pcm_dma_complete(void *arg)
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{
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struct snd_pcm_substream *substream = arg;
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snd_pcm_period_elapsed(substream);
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}
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static int imx_rpmsg_prepare_and_submit(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_BUFFER];
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msg->s_msg.header.cmd = TX_BUFFER;
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} else {
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msg = &info->msg[RX_BUFFER];
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msg->s_msg.header.cmd = RX_BUFFER;
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}
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/* Send buffer address and buffer size */
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msg->s_msg.param.buffer_addr = substream->runtime->dma_addr;
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msg->s_msg.param.buffer_size = snd_pcm_lib_buffer_bytes(substream);
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msg->s_msg.param.period_size = snd_pcm_lib_period_bytes(substream);
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msg->s_msg.param.buffer_tail = 0;
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info->num_period[substream->stream] = msg->s_msg.param.buffer_size /
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msg->s_msg.param.period_size;
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info->callback[substream->stream] = imx_rpmsg_pcm_dma_complete;
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info->callback_param[substream->stream] = substream;
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return imx_rpmsg_insert_workqueue(substream, msg, info);
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}
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static int imx_rpmsg_async_issue_pending(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_START];
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msg->s_msg.header.cmd = TX_START;
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} else {
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msg = &info->msg[RX_START];
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msg->s_msg.header.cmd = RX_START;
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}
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return imx_rpmsg_insert_workqueue(substream, msg, info);
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}
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static int imx_rpmsg_restart(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_RESTART];
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msg->s_msg.header.cmd = TX_RESTART;
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} else {
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msg = &info->msg[RX_RESTART];
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msg->s_msg.header.cmd = RX_RESTART;
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}
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return imx_rpmsg_insert_workqueue(substream, msg, info);
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}
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static int imx_rpmsg_pause(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_PAUSE];
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msg->s_msg.header.cmd = TX_PAUSE;
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} else {
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msg = &info->msg[RX_PAUSE];
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msg->s_msg.header.cmd = RX_PAUSE;
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}
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return imx_rpmsg_insert_workqueue(substream, msg, info);
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}
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static int imx_rpmsg_terminate_all(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct rpmsg_info *info = dev_get_drvdata(component->dev);
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struct rpmsg_msg *msg;
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int cmd;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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msg = &info->msg[TX_TERMINATE];
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msg->s_msg.header.cmd = TX_TERMINATE;
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/* Clear buffer count*/
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cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM;
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info->msg[cmd].s_msg.param.buffer_tail = 0;
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info->msg[cmd].r_msg.param.buffer_tail = 0;
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info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
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} else {
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msg = &info->msg[RX_TERMINATE];
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msg->s_msg.header.cmd = RX_TERMINATE;
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/* Clear buffer count*/
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cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM;
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info->msg[cmd].s_msg.param.buffer_tail = 0;
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info->msg[cmd].r_msg.param.buffer_tail = 0;
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info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
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}
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del_timer(&info->stream_timer[substream->stream].timer);
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return imx_rpmsg_insert_workqueue(substream, msg, info);
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}
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static int imx_rpmsg_pcm_trigger(struct snd_soc_component *component,
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struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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ret = imx_rpmsg_prepare_and_submit(component, substream);
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if (ret)
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return ret;
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ret = imx_rpmsg_async_issue_pending(component, substream);
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break;
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case SNDRV_PCM_TRIGGER_RESUME:
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if (rpmsg->force_lpa)
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break;
|
|
fallthrough;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
ret = imx_rpmsg_restart(component, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
if (!rpmsg->force_lpa) {
|
|
if (runtime->info & SNDRV_PCM_INFO_PAUSE)
|
|
ret = imx_rpmsg_pause(component, substream);
|
|
else
|
|
ret = imx_rpmsg_terminate_all(component, substream);
|
|
}
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
ret = imx_rpmsg_pause(component, substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
ret = imx_rpmsg_terminate_all(component, substream);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* imx_rpmsg_pcm_ack
|
|
*
|
|
* Send the period index to M core through rpmsg, but not send
|
|
* all the period index to M core, reduce some unnessesary msg
|
|
* to reduce the pressure of rpmsg bandwidth.
|
|
*/
|
|
static int imx_rpmsg_pcm_ack(struct snd_soc_component *component,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
|
|
struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
|
|
struct rpmsg_info *info = dev_get_drvdata(component->dev);
|
|
snd_pcm_uframes_t period_size = runtime->period_size;
|
|
snd_pcm_sframes_t avail;
|
|
struct timer_list *timer;
|
|
struct rpmsg_msg *msg;
|
|
unsigned long flags;
|
|
int buffer_tail = 0;
|
|
int written_num;
|
|
|
|
if (!rpmsg->force_lpa)
|
|
return 0;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
|
|
msg->s_msg.header.cmd = TX_PERIOD_DONE;
|
|
} else {
|
|
msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
|
|
msg->s_msg.header.cmd = RX_PERIOD_DONE;
|
|
}
|
|
|
|
msg->s_msg.header.type = MSG_TYPE_C;
|
|
|
|
buffer_tail = (frames_to_bytes(runtime, runtime->control->appl_ptr) %
|
|
snd_pcm_lib_buffer_bytes(substream));
|
|
buffer_tail = buffer_tail / snd_pcm_lib_period_bytes(substream);
|
|
|
|
/* There is update for period index */
|
|
if (buffer_tail != msg->s_msg.param.buffer_tail) {
|
|
written_num = buffer_tail - msg->s_msg.param.buffer_tail;
|
|
if (written_num < 0)
|
|
written_num += runtime->periods;
|
|
|
|
msg->s_msg.param.buffer_tail = buffer_tail;
|
|
|
|
/* The notification message is updated to latest */
|
|
spin_lock_irqsave(&info->lock[substream->stream], flags);
|
|
memcpy(&info->notify[substream->stream], msg,
|
|
sizeof(struct rpmsg_s_msg));
|
|
info->notify_updated[substream->stream] = true;
|
|
spin_unlock_irqrestore(&info->lock[substream->stream], flags);
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
avail = snd_pcm_playback_hw_avail(runtime);
|
|
else
|
|
avail = snd_pcm_capture_hw_avail(runtime);
|
|
|
|
timer = &info->stream_timer[substream->stream].timer;
|
|
/*
|
|
* If the data in the buffer is less than one period before
|
|
* this fill, which means the data may not enough on M
|
|
* core side, we need to send message immediately to let
|
|
* M core know the pointer is updated.
|
|
* if there is more than one period data in the buffer before
|
|
* this fill, which means the data is enough on M core side,
|
|
* we can delay one period (using timer) to send the message
|
|
* for reduce the message number in workqueue, because the
|
|
* pointer may be updated by ack function later, we can
|
|
* send latest pointer to M core side.
|
|
*/
|
|
if ((avail - written_num * period_size) <= period_size) {
|
|
imx_rpmsg_insert_workqueue(substream, msg, info);
|
|
} else if (rpmsg->force_lpa && !timer_pending(timer)) {
|
|
int time_msec;
|
|
|
|
time_msec = (int)(runtime->period_size * 1000 / runtime->rate);
|
|
mod_timer(timer, jiffies + msecs_to_jiffies(time_msec));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx_rpmsg_pcm_new(struct snd_soc_component *component,
|
|
struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
struct snd_card *card = rtd->card->snd_card;
|
|
struct snd_pcm *pcm = rtd->pcm;
|
|
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
|
|
struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
|
|
int ret;
|
|
|
|
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ret;
|
|
|
|
imx_rpmsg_pcm_hardware.buffer_bytes_max = rpmsg->buffer_size;
|
|
return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
|
|
pcm->card->dev, rpmsg->buffer_size);
|
|
}
|
|
|
|
static const struct snd_soc_component_driver imx_rpmsg_soc_component = {
|
|
.name = IMX_PCM_DRV_NAME,
|
|
.pcm_construct = imx_rpmsg_pcm_new,
|
|
.open = imx_rpmsg_pcm_open,
|
|
.close = imx_rpmsg_pcm_close,
|
|
.hw_params = imx_rpmsg_pcm_hw_params,
|
|
.trigger = imx_rpmsg_pcm_trigger,
|
|
.pointer = imx_rpmsg_pcm_pointer,
|
|
.ack = imx_rpmsg_pcm_ack,
|
|
.prepare = imx_rpmsg_pcm_prepare,
|
|
};
|
|
|
|
static void imx_rpmsg_pcm_work(struct work_struct *work)
|
|
{
|
|
struct work_of_rpmsg *work_of_rpmsg;
|
|
bool is_notification = false;
|
|
struct rpmsg_info *info;
|
|
struct rpmsg_msg msg;
|
|
unsigned long flags;
|
|
|
|
work_of_rpmsg = container_of(work, struct work_of_rpmsg, work);
|
|
info = work_of_rpmsg->info;
|
|
|
|
/*
|
|
* Every work in the work queue, first we check if there
|
|
* is update for period is filled, because there may be not
|
|
* enough data in M core side, need to let M core know
|
|
* data is updated immediately.
|
|
*/
|
|
spin_lock_irqsave(&info->lock[TX], flags);
|
|
if (info->notify_updated[TX]) {
|
|
memcpy(&msg, &info->notify[TX], sizeof(struct rpmsg_s_msg));
|
|
info->notify_updated[TX] = false;
|
|
spin_unlock_irqrestore(&info->lock[TX], flags);
|
|
info->send_message(&msg, info);
|
|
} else {
|
|
spin_unlock_irqrestore(&info->lock[TX], flags);
|
|
}
|
|
|
|
spin_lock_irqsave(&info->lock[RX], flags);
|
|
if (info->notify_updated[RX]) {
|
|
memcpy(&msg, &info->notify[RX], sizeof(struct rpmsg_s_msg));
|
|
info->notify_updated[RX] = false;
|
|
spin_unlock_irqrestore(&info->lock[RX], flags);
|
|
info->send_message(&msg, info);
|
|
} else {
|
|
spin_unlock_irqrestore(&info->lock[RX], flags);
|
|
}
|
|
|
|
/* Skip the notification message for it has been processed above */
|
|
if (work_of_rpmsg->msg.s_msg.header.type == MSG_TYPE_C &&
|
|
(work_of_rpmsg->msg.s_msg.header.cmd == TX_PERIOD_DONE ||
|
|
work_of_rpmsg->msg.s_msg.header.cmd == RX_PERIOD_DONE))
|
|
is_notification = true;
|
|
|
|
if (!is_notification)
|
|
info->send_message(&work_of_rpmsg->msg, info);
|
|
|
|
/* update read index */
|
|
spin_lock_irqsave(&info->wq_lock, flags);
|
|
info->work_read_index++;
|
|
info->work_read_index %= WORK_MAX_NUM;
|
|
spin_unlock_irqrestore(&info->wq_lock, flags);
|
|
}
|
|
|
|
static int imx_rpmsg_pcm_probe(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_component *component;
|
|
struct rpmsg_info *info;
|
|
int ret, i;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
info->rpdev = container_of(pdev->dev.parent, struct rpmsg_device, dev);
|
|
info->dev = &pdev->dev;
|
|
/* Setup work queue */
|
|
info->rpmsg_wq = alloc_ordered_workqueue("rpmsg_audio",
|
|
WQ_HIGHPRI |
|
|
WQ_UNBOUND |
|
|
WQ_FREEZABLE);
|
|
if (!info->rpmsg_wq) {
|
|
dev_err(&pdev->dev, "workqueue create failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Write index initialize 1, make it differ with the read index */
|
|
info->work_write_index = 1;
|
|
info->send_message = imx_rpmsg_pcm_send_message;
|
|
|
|
for (i = 0; i < WORK_MAX_NUM; i++) {
|
|
INIT_WORK(&info->work_list[i].work, imx_rpmsg_pcm_work);
|
|
info->work_list[i].info = info;
|
|
}
|
|
|
|
/* Initialize msg */
|
|
for (i = 0; i < MSG_MAX_NUM; i++) {
|
|
info->msg[i].s_msg.header.cate = IMX_RPMSG_AUDIO;
|
|
info->msg[i].s_msg.header.major = IMX_RMPSG_MAJOR;
|
|
info->msg[i].s_msg.header.minor = IMX_RMPSG_MINOR;
|
|
info->msg[i].s_msg.header.type = MSG_TYPE_A;
|
|
info->msg[i].s_msg.param.audioindex = 0;
|
|
}
|
|
|
|
init_completion(&info->cmd_complete);
|
|
mutex_init(&info->msg_lock);
|
|
spin_lock_init(&info->lock[TX]);
|
|
spin_lock_init(&info->lock[RX]);
|
|
spin_lock_init(&info->wq_lock);
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev,
|
|
&imx_rpmsg_soc_component,
|
|
NULL, 0);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
component = snd_soc_lookup_component(&pdev->dev, IMX_PCM_DRV_NAME);
|
|
if (!component) {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
#ifdef CONFIG_DEBUG_FS
|
|
component->debugfs_prefix = "rpmsg";
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (info->rpmsg_wq)
|
|
destroy_workqueue(info->rpmsg_wq);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int imx_rpmsg_pcm_remove(struct platform_device *pdev)
|
|
{
|
|
struct rpmsg_info *info = platform_get_drvdata(pdev);
|
|
|
|
if (info->rpmsg_wq)
|
|
destroy_workqueue(info->rpmsg_wq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int imx_rpmsg_pcm_runtime_resume(struct device *dev)
|
|
{
|
|
struct rpmsg_info *info = dev_get_drvdata(dev);
|
|
|
|
cpu_latency_qos_add_request(&info->pm_qos_req, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx_rpmsg_pcm_runtime_suspend(struct device *dev)
|
|
{
|
|
struct rpmsg_info *info = dev_get_drvdata(dev);
|
|
|
|
cpu_latency_qos_remove_request(&info->pm_qos_req);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int imx_rpmsg_pcm_suspend(struct device *dev)
|
|
{
|
|
struct rpmsg_info *info = dev_get_drvdata(dev);
|
|
struct rpmsg_msg *rpmsg_tx;
|
|
struct rpmsg_msg *rpmsg_rx;
|
|
|
|
rpmsg_tx = &info->msg[TX_SUSPEND];
|
|
rpmsg_rx = &info->msg[RX_SUSPEND];
|
|
|
|
rpmsg_tx->s_msg.header.cmd = TX_SUSPEND;
|
|
info->send_message(rpmsg_tx, info);
|
|
|
|
rpmsg_rx->s_msg.header.cmd = RX_SUSPEND;
|
|
info->send_message(rpmsg_rx, info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx_rpmsg_pcm_resume(struct device *dev)
|
|
{
|
|
struct rpmsg_info *info = dev_get_drvdata(dev);
|
|
struct rpmsg_msg *rpmsg_tx;
|
|
struct rpmsg_msg *rpmsg_rx;
|
|
|
|
rpmsg_tx = &info->msg[TX_RESUME];
|
|
rpmsg_rx = &info->msg[RX_RESUME];
|
|
|
|
rpmsg_tx->s_msg.header.cmd = TX_RESUME;
|
|
info->send_message(rpmsg_tx, info);
|
|
|
|
rpmsg_rx->s_msg.header.cmd = RX_RESUME;
|
|
info->send_message(rpmsg_rx, info);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static const struct dev_pm_ops imx_rpmsg_pcm_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(imx_rpmsg_pcm_runtime_suspend,
|
|
imx_rpmsg_pcm_runtime_resume,
|
|
NULL)
|
|
SET_SYSTEM_SLEEP_PM_OPS(imx_rpmsg_pcm_suspend,
|
|
imx_rpmsg_pcm_resume)
|
|
};
|
|
|
|
static struct platform_driver imx_pcm_rpmsg_driver = {
|
|
.probe = imx_rpmsg_pcm_probe,
|
|
.remove = imx_rpmsg_pcm_remove,
|
|
.driver = {
|
|
.name = IMX_PCM_DRV_NAME,
|
|
.pm = &imx_rpmsg_pcm_pm_ops,
|
|
},
|
|
};
|
|
module_platform_driver(imx_pcm_rpmsg_driver);
|
|
|
|
MODULE_DESCRIPTION("Freescale SoC Audio RPMSG PCM interface");
|
|
MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
|
|
MODULE_ALIAS("platform:" IMX_PCM_DRV_NAME);
|
|
MODULE_LICENSE("GPL v2");
|