From patchwork Sun Feb 7 10:23:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shengjiu Wang X-Patchwork-Id: 378632 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,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 E6231C433E0 for ; Sun, 7 Feb 2021 10:36:40 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 752F864E44 for ; Sun, 7 Feb 2021 10:36:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 752F864E44 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id E53E9950; Sun, 7 Feb 2021 11:35:46 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz E53E9950 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1612694197; bh=e3w4T4Z9ZXbqzvwgpobO14/H9peGwBtDmymA9pxHpRk=; h=From:To:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=ldS7DMuwHahkiQJzIVokM3pm+fSzLVGX8l1e47OqDiqExP4X5aTbKgYex0mNcl53Q TtTRJxn4ZCuX2stLGMFrJOOpT9EELgHmpD7XgeAJf03s3NGifLDndo0HPdn2FUEVTo bXbQenQavdArL+FBUTEnyCcVxk9bXPFcHwr3wPUg= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 6E7EFF80260; Sun, 7 Feb 2021 11:35:46 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 72D0AF80260; Sun, 7 Feb 2021 11:35:43 +0100 (CET) Received: from inva021.nxp.com (inva021.nxp.com [92.121.34.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id A0D56F8013A for ; Sun, 7 Feb 2021 11:35:33 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz A0D56F8013A Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 329CD200E46; Sun, 7 Feb 2021 11:35:33 +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 EA29D2019AC; Sun, 7 Feb 2021 11:35:27 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 6F3AA4030C; Sun, 7 Feb 2021 11:35:21 +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 v2 4/7] ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio channel Date: Sun, 7 Feb 2021 18:23:52 +0800 Message-Id: <1612693435-31418-5-git-send-email-shengjiu.wang@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1612693435-31418-1-git-send-email-shengjiu.wang@nxp.com> References: <1612693435-31418-1-git-send-email-shengjiu.wang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" 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 message 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 a688c3c2efbc..84d9f0f1f75b 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");