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[23.128.96.18]) by mx.google.com with ESMTP id y4si9027330ejp.679.2021.02.07.02.38.22; Sun, 07 Feb 2021 02:38:45 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229536AbhBGKgo (ORCPT + 99 others); Sun, 7 Feb 2021 05:36:44 -0500 Received: from inva021.nxp.com ([92.121.34.21]:38528 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229522AbhBGKgU (ORCPT ); Sun, 7 Feb 2021 05:36:20 -0500 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 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 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"); -- 2.27.0