From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 135E7C43331 for ; Mon, 8 Mar 2021 13:36:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA82B651DD for ; Mon, 8 Mar 2021 13:36:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230409AbhCHNgO (ORCPT ); Mon, 8 Mar 2021 08:36:14 -0500 Received: from inva021.nxp.com ([92.121.34.21]:37952 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230444AbhCHNfl (ORCPT ); Mon, 8 Mar 2021 08:35:41 -0500 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id E8C0E20050C; Mon, 8 Mar 2021 14:35:39 +0100 (CET) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 1ABAE20050B; Mon, 8 Mar 2021 14:35:33 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id B6889402B0; Mon, 8 Mar 2021 14:35:24 +0100 (CET) From: Shengjiu Wang To: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, timur@kernel.org, nicoleotsuka@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com, linuxppc-dev@lists.ozlabs.org, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH v4 4/6] ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio channel Date: Mon, 8 Mar 2021 21:22:28 +0800 Message-Id: <1615209750-2357-5-git-send-email-shengjiu.wang@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1615209750-2357-1-git-send-email-shengjiu.wang@nxp.com> References: <1615209750-2357-1-git-send-email-shengjiu.wang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This driver is used to accept the message from rpmsg audio channel, and if this driver is probed, it will help to register the platform driver, the platform driver will use this audio channel to send and receive messages to and from Cortex-M core. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/Kconfig | 4 + sound/soc/fsl/Makefile | 1 + sound/soc/fsl/imx-audio-rpmsg.c | 151 ++++++++++++++++++++++++++++++++ 3 files changed, 156 insertions(+) create mode 100644 sound/soc/fsl/imx-audio-rpmsg.c diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index f833856f6de0..cc81f6b917be 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -126,6 +126,10 @@ config SND_SOC_IMX_PCM_DMA tristate select SND_SOC_GENERIC_DMAENGINE_PCM +config SND_SOC_IMX_AUDIO_RPMSG + tristate + depends on RPMSG + config SND_SOC_IMX_AUDMUX tristate "Digital Audio Mux module support" help diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index b63802f345cc..f08f3cd07ff5 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_SND_SOC_IMX_AUDMUX) += snd-soc-imx-audmux.o obj-$(CONFIG_SND_SOC_IMX_PCM_FIQ) += imx-pcm-fiq.o obj-$(CONFIG_SND_SOC_IMX_PCM_DMA) += imx-pcm-dma.o +obj-$(CONFIG_SND_SOC_IMX_AUDIO_RPMSG) += imx-audio-rpmsg.o # i.MX Machine Support snd-soc-eukrea-tlv320-objs := eukrea-tlv320.o diff --git a/sound/soc/fsl/imx-audio-rpmsg.c b/sound/soc/fsl/imx-audio-rpmsg.c new file mode 100644 index 000000000000..145edb1492b4 --- /dev/null +++ b/sound/soc/fsl/imx-audio-rpmsg.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: GPL-2.0+ +// Copyright 2017-2020 NXP + +#include +#include +#include "imx-pcm-rpmsg.h" + +/* + * struct imx_audio_rpmsg: private data + * + * @rpmsg_pdev: pointer of platform device + */ +struct imx_audio_rpmsg { + struct platform_device *rpmsg_pdev; +}; + +static int imx_audio_rpmsg_cb(struct rpmsg_device *rpdev, void *data, int len, + void *priv, u32 src) +{ + struct imx_audio_rpmsg *rpmsg = dev_get_drvdata(&rpdev->dev); + struct rpmsg_info *info = platform_get_drvdata(rpmsg->rpmsg_pdev); + struct rpmsg_r_msg *r_msg = (struct rpmsg_r_msg *)data; + struct rpmsg_msg *msg; + unsigned long flags; + + dev_dbg(&rpdev->dev, "get from%d: cmd:%d. %d\n", + src, r_msg->header.cmd, r_msg->param.resp); + + switch (r_msg->header.type) { + case MSG_TYPE_C: + /* TYPE C is notification from M core */ + switch (r_msg->header.cmd) { + case TX_PERIOD_DONE: + spin_lock_irqsave(&info->lock[TX], flags); + msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM]; + + /* + * Low power mode: get the buffer pointer from + * receive msg. + */ + if (r_msg->header.major == 1 && + r_msg->header.minor == 2) + msg->r_msg.param.buffer_tail = + r_msg->param.buffer_tail; + else + msg->r_msg.param.buffer_tail++; + + msg->r_msg.param.buffer_tail %= info->num_period[TX]; + spin_unlock_irqrestore(&info->lock[TX], flags); + info->callback[TX](info->callback_param[TX]); + break; + case RX_PERIOD_DONE: + spin_lock_irqsave(&info->lock[RX], flags); + msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM]; + + if (r_msg->header.major == 1 && + r_msg->header.minor == 2) + msg->r_msg.param.buffer_tail = + r_msg->param.buffer_tail; + else + msg->r_msg.param.buffer_tail++; + + msg->r_msg.param.buffer_tail %= info->num_period[1]; + spin_unlock_irqrestore(&info->lock[RX], flags); + info->callback[RX](info->callback_param[RX]); + break; + default: + dev_warn(&rpdev->dev, "unknown msg command\n"); + break; + } + break; + case MSG_TYPE_B: + /* TYPE B is response msg */ + memcpy(&info->r_msg, r_msg, sizeof(struct rpmsg_r_msg)); + complete(&info->cmd_complete); + break; + default: + dev_warn(&rpdev->dev, "unknown msg type\n"); + break; + } + + return 0; +} + +static int imx_audio_rpmsg_probe(struct rpmsg_device *rpdev) +{ + struct imx_audio_rpmsg *data; + int ret = 0; + + dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n", + rpdev->src, rpdev->dst); + + data = devm_kzalloc(&rpdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + dev_set_drvdata(&rpdev->dev, data); + + /* Register platform driver for rpmsg routine */ + data->rpmsg_pdev = platform_device_register_data(&rpdev->dev, + IMX_PCM_DRV_NAME, + PLATFORM_DEVID_NONE, + NULL, 0); + if (IS_ERR(data->rpmsg_pdev)) { + dev_err(&rpdev->dev, "failed to register rpmsg platform.\n"); + ret = PTR_ERR(data->rpmsg_pdev); + } + + return ret; +} + +static void imx_audio_rpmsg_remove(struct rpmsg_device *rpdev) +{ + struct imx_audio_rpmsg *data = dev_get_drvdata(&rpdev->dev); + + if (data->rpmsg_pdev) + platform_device_unregister(data->rpmsg_pdev); + + dev_info(&rpdev->dev, "audio rpmsg driver is removed\n"); +} + +static struct rpmsg_device_id imx_audio_rpmsg_id_table[] = { + { .name = "rpmsg-audio-channel" }, + { }, +}; + +static struct rpmsg_driver imx_audio_rpmsg_driver = { + .drv.name = "imx_audio_rpmsg", + .drv.owner = THIS_MODULE, + .id_table = imx_audio_rpmsg_id_table, + .probe = imx_audio_rpmsg_probe, + .callback = imx_audio_rpmsg_cb, + .remove = imx_audio_rpmsg_remove, +}; + +static int __init imx_audio_rpmsg_init(void) +{ + return register_rpmsg_driver(&imx_audio_rpmsg_driver); +} + +static void __exit imx_audio_rpmsg_exit(void) +{ + unregister_rpmsg_driver(&imx_audio_rpmsg_driver); +} +module_init(imx_audio_rpmsg_init); +module_exit(imx_audio_rpmsg_exit); + +MODULE_DESCRIPTION("Freescale SoC Audio RPMSG interface"); +MODULE_AUTHOR("Shengjiu Wang "); +MODULE_ALIAS("platform:imx_audio_rpmsg"); +MODULE_LICENSE("GPL v2"); -- 2.27.0