From patchwork Mon Mar 17 11:03:23 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SmppYW4gWmhvdSAo5ZGo5bu6KQ==?= X-Patchwork-Id: 14019046 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 06AD5C282EC for ; Mon, 17 Mar 2025 11:09:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=InaeS8/UkU8eLyrlVZZUnJa6Ghra5rWqfYuQwgP38JU=; b=ygMszp+xMsL1rBbzdSuCUWMX1X vumA6EhXJsoPTSSJuo8OVRLZAs/rLW8nQHBrOulU/8gSNjVJfp7x4usZUvxfTeSEzirtfEBNXjgPg dGd4aSFEvlZ4PWaJEjaDDNRmSiTqRG8whYXt0hsoy4iqWnqfNIdAXJaIhQRxrCTP2F5vW+mJsEc7j RiBSx7WNxJJ6v4vmpCc30Xrm987VF/W2La6GukUB3yJ4RUyTdFLvCvDpCoL7UYvBPf6qAIf6TJsim Cvjkc9UZq6HpahobRhrqCxbj2+7kKWjabR8D+m8gPHBWyrGPiQ+CURCukx+bKMW3Epn3vrY35vQim 8LTbzgNQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tu8L1-00000002KtV-1X7U; Mon, 17 Mar 2025 11:08:55 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tu8G2-00000002JXd-0p7G; Mon, 17 Mar 2025 11:03:47 +0000 X-UUID: 7a50b61a031f11f0a1e849db4cc18d44-20250317 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=InaeS8/UkU8eLyrlVZZUnJa6Ghra5rWqfYuQwgP38JU=; b=udTMsGkCISTHhSSNkG3heTg16J3Gx/GP7LaaJDQqRiCD0ODwvoDw5QoXjDe8KuOKj2RpMNDsjzmilQxh+yZzbHhPViQGm6Wx27HDQwGoJVtmysUg733E4pU39mO+92+AxvIRCzSn3PgtjTTGEr23GaSmWBsifHO9QOzFB5+vvz8=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.2.1,REQID:5ec21bcf-f201-4883-91a6-49ae098dbc2a,IP:0,UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:r elease,TS:0 X-CID-META: VersionHash:0ef645f,CLOUDID:d08842e1-3561-4519-9a12-e2c881788b70,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:81|82|102,TC:nil,Content:0|50,EDM:-3 ,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV :0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 7a50b61a031f11f0a1e849db4cc18d44-20250317 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 620648479; Mon, 17 Mar 2025 04:03:37 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.39; Mon, 17 Mar 2025 19:03:35 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1258.39 via Frontend Transport; Mon, 17 Mar 2025 19:03:34 +0800 From: Jjian Zhou To: Jassi Brar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , Chen-Yu Tsai , Jjian Zhou Subject: [PATCH RFC v3 1/3] mailbox: mediatek: Add mtk-vcp-mailbox driver Date: Mon, 17 Mar 2025 19:03:23 +0800 Message-ID: <20250317110331.2776-2-jjian.zhou@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20250317110331.2776-1-jjian.zhou@mediatek.com> References: <20250317110331.2776-1-jjian.zhou@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250317_040346_237648_747B095D X-CRM114-Status: GOOD ( 24.65 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add mtk-vcp-mailbox driver to support the communication with VCP remote microprocessor. Signed-off-by: Jjian Zhou --- drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mtk-vcp-mailbox.c | 179 ++++++++++++++++++++++++ include/linux/mailbox/mtk-vcp-mailbox.h | 34 +++++ 4 files changed, 224 insertions(+) create mode 100644 drivers/mailbox/mtk-vcp-mailbox.c create mode 100644 include/linux/mailbox/mtk-vcp-mailbox.h diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index ed52db272f4d..ffc4a5491462 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -275,6 +275,15 @@ config MTK_CMDQ_MBOX critical time limitation, such as updating display configuration during the vblank. +config MTK_VCP_MBOX + tristate "MediaTek VCP Mailbox Support" + depends on ARCH_MEDIATEK || COMPILE_TEST + help + Say yes here to add support for the MediaTek VCP mailbox driver. + The mailbox implementation provides access from the application + processor to the MediaTek Video Processing Unit. + If unsure say N. + config ZYNQMP_IPI_MBOX tristate "Xilinx ZynqMP IPI Mailbox" depends on ARCH_ZYNQMP && OF diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 9a1542b55539..75a200a9d2d2 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -59,6 +59,8 @@ obj-$(CONFIG_MTK_ADSP_MBOX) += mtk-adsp-mailbox.o obj-$(CONFIG_MTK_CMDQ_MBOX) += mtk-cmdq-mailbox.o +obj-$(CONFIG_MTK_VCP_MBOX) += mtk-vcp-mailbox.o + obj-$(CONFIG_ZYNQMP_IPI_MBOX) += zynqmp-ipi-mailbox.o obj-$(CONFIG_SUN6I_MSGBOX) += sun6i-msgbox.o diff --git a/drivers/mailbox/mtk-vcp-mailbox.c b/drivers/mailbox/mtk-vcp-mailbox.c new file mode 100644 index 000000000000..fd7a123c71c8 --- /dev/null +++ b/drivers/mailbox/mtk-vcp-mailbox.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025 MediaTek Corporation. All rights reserved. + * Author: Jjian Zhou + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct mtk_vcp_mbox_priv { + void __iomem *base; + struct device *dev; + struct mbox_controller mbox; + const struct mtk_vcp_mbox_cfg *cfg; + struct mtk_ipi_info ipi_recv; +}; + +struct mtk_vcp_mbox_cfg { + u32 set_in; + u32 clr_out; +}; + +static inline struct mtk_vcp_mbox_priv *get_mtk_vcp_mbox_priv(struct mbox_controller *mbox) +{ + return container_of(mbox, struct mtk_vcp_mbox_priv, mbox); +} + +static irqreturn_t mtk_vcp_mbox_irq_thread(int irq, void *data) +{ + struct mbox_chan *chan = data; + struct mtk_vcp_mbox_priv *priv = get_mtk_vcp_mbox_priv(chan->mbox); + + /* get irq status */ + priv->ipi_recv.irq_status = readl(priv->base + priv->cfg->clr_out); + + __ioread32_copy(priv->ipi_recv.msg, priv->base, MAX_SLOT_NUM); + + mbox_chan_received_data(chan, &priv->ipi_recv); + + /* clear irq status */ + writel(priv->ipi_recv.irq_status, priv->base + priv->cfg->clr_out); + + return IRQ_HANDLED; +} + +static struct mbox_chan *mtk_vcp_mbox_xlate(struct mbox_controller *mbox, + const struct of_phandle_args *sp) +{ + if (sp->args_count) + return NULL; + + return mbox->chans; +} + +static int mtk_vcp_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct mtk_vcp_mbox_priv *priv = get_mtk_vcp_mbox_priv(chan->mbox); + struct mtk_ipi_info *ipi_info = data; + u32 status; + + if (!ipi_info->msg) { + dev_err(priv->dev, "msg buffer is NULL.\n"); + return -ENOMEM; + } + + status = readl(priv->base + priv->cfg->set_in) & BIT(ipi_info->index); + if (status) { + dev_err(priv->dev, "mailbox IPI %d is busy.\n", ipi_info->id); + return -EBUSY; + } + + if (ipi_info->slot_ofs + ipi_info->len > MBOX_SLOT_MAX_SIZE) + return -EINVAL; + __iowrite32_copy(priv->base + ipi_info->slot_ofs, ipi_info->msg, + ipi_info->len); + + writel(BIT(ipi_info->index), priv->base + priv->cfg->set_in); + + return 0; +} + +static bool mtk_vcp_mbox_last_tx_done(struct mbox_chan *chan) +{ + struct mtk_ipi_info *ipi_info = chan->active_req; + struct mtk_vcp_mbox_priv *priv = get_mtk_vcp_mbox_priv(chan->mbox); + u32 op; + + op = readl(priv->base + priv->cfg->set_in) & BIT(ipi_info->index); + return !op; +} + +static const struct mbox_chan_ops mtk_vcp_mbox_chan_ops = { + .send_data = mtk_vcp_mbox_send_data, + .last_tx_done = mtk_vcp_mbox_last_tx_done, +}; + +static int mtk_vcp_mbox_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_vcp_mbox_priv *priv; + struct mbox_controller *mbox; + int ret, irq; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + mbox = &priv->mbox; + mbox->dev = dev; + mbox->ops = &mtk_vcp_mbox_chan_ops; + mbox->txdone_irq = false; + mbox->txdone_poll = true; + mbox->of_xlate = mtk_vcp_mbox_xlate; + mbox->num_chans = 1; + mbox->chans = devm_kzalloc(dev, sizeof(*mbox->chans), GFP_KERNEL); + if (!mbox->chans) + return -ENOMEM; + + priv->ipi_recv.msg = devm_kzalloc(dev, sizeof(u8) * MBOX_SLOT_MAX_SIZE, + GFP_KERNEL); + if (!priv->ipi_recv.msg) + return -ENOMEM; + + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + priv->cfg = of_device_get_match_data(dev); + if (!priv->cfg) + return -EINVAL; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(dev, irq, NULL, + mtk_vcp_mbox_irq_thread, IRQF_ONESHOT, + dev_name(dev), mbox->chans); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, priv); + + dev_dbg(dev, "MTK VCP mailbox initialized\n"); + + return devm_mbox_controller_register(dev, &priv->mbox); +} + +static const struct mtk_vcp_mbox_cfg mt8196_cfg = { + .set_in = 0x100, + .clr_out = 0x10C, +}; + +static const struct of_device_id mtk_vcp_mbox_of_match[] = { + { .compatible = "mediatek,mt8196-vcp-mbox", .data = &mt8196_cfg }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_vcp_mbox_of_match); + +static struct platform_driver mtk_vcp_mbox_driver = { + .probe = mtk_vcp_mbox_probe, + .driver = { + .name = "mtk_vcp_mbox", + .of_match_table = mtk_vcp_mbox_of_match, + }, +}; +module_platform_driver(mtk_vcp_mbox_driver); + +MODULE_AUTHOR("Jjian Zhou "); +MODULE_DESCRIPTION("MTK VCP Mailbox Controller"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mailbox/mtk-vcp-mailbox.h b/include/linux/mailbox/mtk-vcp-mailbox.h new file mode 100644 index 000000000000..953499b7cfeb --- /dev/null +++ b/include/linux/mailbox/mtk-vcp-mailbox.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */ +/* + * Copyright (c) 2024 MediaTek Inc. + */ + +#ifndef __MTK_VCP_MAILBOX_H__ +#define __MTK_VCP_MAILBOX_H__ + +#define MBOX_SLOT_MAX_SIZE 0x100 /* mbox max slot size */ +#define MAX_SLOT_NUM 64 + +/** + * struct mtk_ipi_info - channel table that belong to mtk_ipi_device + * @msg: The share buffer between IPC and mailbox driver + * @len: Message length + * @id: IPI number + * @recv_opt: Recv option, 0:receive ,1: response + * @index: The pin groups number of the mailbox channel + * @slot_ofs: Slot offset of the mailbox channel + * @irq_status: Indicate which pin groups triggered the interrupt + * + * It is used between IPC with mailbox driver. + */ +struct mtk_ipi_info { + void *msg; + u32 len; + u32 id; + u32 recv_opt; + u32 index; + u32 slot_ofs; + u32 irq_status; +}; + +#endif