From patchwork Thu Oct 28 13:27:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allen-KH Cheng X-Patchwork-Id: 12590225 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E24B0C433F5 for ; Thu, 28 Oct 2021 13:28:29 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A4A3161040 for ; Thu, 28 Oct 2021 13:28:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A4A3161040 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References: List-Owner; bh=+rbnOeMqhS74U6g+w3N6QMZRJG0WXqf9rtuRBiSWUZQ=; b=LsTeX3nxcu/QwG al3dq5Km1DmbNRrXpjL6PnGF6bcpeFeK4ZDjAndkmnJKsNoi7tnWRjBAVtfRxzovx3pH8U6KWt0zg RT0d4zkEMbp5jtw71TQRLU8ednIQaabp1ypsGEtcwOdWSWeCcltHp75yU8wfez6aMFddw+z4Yiz91 8hOLO8NJyMv1gd2mG5DmTyqijSoAfrKR/jtfQavxfyiFpUeZfC6kNGDGTNMBb1LMgnd7CsYTMEFpC f8T6zkxbtsGidpakjE3XAmDaZ1olPjy2A2Lwsf/6pM69R20PtPjm74EG647IxdUGp+4jIbSG55FNW HebIyu1EQJWiKvxy6/5A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mg5S6-007vhm-C1; Thu, 28 Oct 2021 13:28:18 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mg5Rq-007vcI-MO; Thu, 28 Oct 2021 13:28:04 +0000 X-UUID: a06d3fac32a54bc09697f5e37d0a1b2c-20211028 X-UUID: a06d3fac32a54bc09697f5e37d0a1b2c-20211028 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 528644908; Thu, 28 Oct 2021 06:28:01 -0700 Received: from mtkmbs10n2.mediatek.inc (172.21.101.183) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 28 Oct 2021 06:27:59 -0700 Received: from mtkmbs10n2.mediatek.inc (172.21.101.183) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Thu, 28 Oct 2021 21:27:58 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs10n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Thu, 28 Oct 2021 21:27:58 +0800 From: allen-kh.cheng To: Jassi Brar , Rob Herring , Matthias Brugger CC: , , , , , Allen-KH Cheng Subject: [PATCH 2/3] mailbox: mediatek: add support for adsp mailbox controller Date: Thu, 28 Oct 2021 21:27:56 +0800 Message-ID: <20211028132756.8251-1-allen-kh.cheng@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211028_062802_815177_33529A27 X-CRM114-Status: GOOD ( 21.71 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Allen-KH Cheng This patch is to for MediaTek ADSP IPC mailbox controller driver It is used to send short messages between processors with adsp Signed-off-by: Allen-KH Cheng --- drivers/mailbox/Kconfig | 7 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mtk-adsp-mailbox.c | 187 +++++++++++++++++++++++++++++ 3 files changed, 196 insertions(+) create mode 100644 drivers/mailbox/mtk-adsp-mailbox.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index c9fc06c7e685..d365364e97e5 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -236,6 +236,13 @@ config MTK_CMDQ_MBOX critical time limitation, such as updating display configuration during the vblank. +config MTK_ADSP_IPC_MBOX + tristate "MediaTek ADSP Mailbox Controller" + depends on ARCH_MEDIATEK || COMPILE_TEST + help + Say yes here to add support for MediaTek ADSP IPC mailbox controller + driver. It is used to send short messages between processors with dsp. + config ZYNQMP_IPI_MBOX bool "Xilinx ZynqMP IPI Mailbox" depends on ARCH_ZYNQMP && OF diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index c2089f04887e..479a9ae56d5e 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -51,6 +51,8 @@ obj-$(CONFIG_STM32_IPCC) += stm32-ipcc.o obj-$(CONFIG_MTK_CMDQ_MBOX) += mtk-cmdq-mailbox.o +obj-$(CONFIG_MTK_ADSP_IPC_MBOX) += mtk-adsp-mailbox.o + obj-$(CONFIG_ZYNQMP_IPI_MBOX) += zynqmp-ipi-mailbox.o obj-$(CONFIG_SUN6I_MSGBOX) += sun6i-msgbox.o diff --git a/drivers/mailbox/mtk-adsp-mailbox.c b/drivers/mailbox/mtk-adsp-mailbox.c new file mode 100644 index 000000000000..b814b003aeb2 --- /dev/null +++ b/drivers/mailbox/mtk-adsp-mailbox.c @@ -0,0 +1,187 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2021 MediaTek Corporation. All rights reserved. + * Author: Allen-KH Cheng + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* adsp mbox register offset */ +#define MTK_ADSP_MBOX_IN_CMD 0x00 +#define MTK_ADSP_MBOX_IN_CMD_CLR 0x04 +#define MTK_ADSP_MBOX_OUT_CMD 0x1c +#define MTK_ADSP_MBOX_OUT_CMD_CLR 0x20 +#define MTK_ADSP_MBOX_IN_MSG0 0x08 +#define MTK_ADSP_MBOX_IN_MSG1 0x0C +#define MTK_ADSP_MBOX_OUT_MSG0 0x24 +#define MTK_ADSP_MBOX_OUT_MSG1 0x28 + +struct mtk_adsp_mbox_priv { + struct device *dev; + struct mbox_controller mbox; + void __iomem *va_mboxreg; +}; + +static irqreturn_t mtk_adsp_ipc_irq_handler(int irq, void *data) +{ + struct mbox_chan *ch = (struct mbox_chan *)data; + struct adsp_mbox_ch_info *ch_info = ch->con_priv; + void __iomem *reg = ch_info->va_reg; + u32 op = readl(reg + MTK_ADSP_MBOX_OUT_CMD); + + writel(op, reg + MTK_ADSP_MBOX_OUT_CMD_CLR); + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t mtk_adsp_ipc_handler(int irq, void *data) +{ + struct mbox_chan *ch = (struct mbox_chan *)data; + struct adsp_mbox_ch_info *ch_info = ch->con_priv; + + mbox_chan_received_data(ch, ch_info); + + return IRQ_HANDLED; +} + +static struct mbox_chan *mtk_adsp_mbox_xlate(struct mbox_controller *mbox, + const struct of_phandle_args *sp) +{ + return &mbox->chans[sp->args[0]]; +} + +static int mtk_adsp_mbox_startup(struct mbox_chan *chan) +{ + struct adsp_mbox_ch_info *ch_info = chan->con_priv; + void __iomem *reg = ch_info->va_reg; + + /* Clear DSP mbox command */ + writel(0xFFFFFFFF, reg + MTK_ADSP_MBOX_IN_CMD_CLR); + writel(0xFFFFFFFF, reg + MTK_ADSP_MBOX_OUT_CMD_CLR); + + return 0; +} + +static void mtk_adsp_mbox_shutdown(struct mbox_chan *chan) +{ + chan->con_priv = NULL; +} + +static int mtk_adsp_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct adsp_mbox_ch_info *ch_info = chan->con_priv; + void __iomem *reg = ch_info->va_reg; + + spin_lock(&ch_info->lock); + writel(ch_info->ipc_op_val, reg + MTK_ADSP_MBOX_IN_CMD); + spin_unlock(&ch_info->lock); + + return 0; +} + +static bool mtk_adsp_mbox_last_tx_done(struct mbox_chan *chan) +{ + struct adsp_mbox_ch_info *ch_info = chan->con_priv; + void __iomem *reg = ch_info->va_reg; + u32 op = readl(reg + MTK_ADSP_MBOX_IN_CMD); + + return (op == 0) ? true : false; +} + +static const struct mbox_chan_ops adsp_mbox_chan_ops = { + .send_data = mtk_adsp_mbox_send_data, + .startup = mtk_adsp_mbox_startup, + .shutdown = mtk_adsp_mbox_shutdown, + .last_tx_done = mtk_adsp_mbox_last_tx_done, +}; + +static int mtk_adsp_mbox_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mbox_controller *mbox; + struct mtk_adsp_mbox_priv *priv; + struct resource *res; + struct adsp_mbox_ch_info *ch_info; + u32 size; + int ret; + int irq; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + mbox = &priv->mbox; + mbox->dev = dev; + mbox->ops = &adsp_mbox_chan_ops; + mbox->txdone_irq = false; + mbox->txdone_poll = true; + mbox->of_xlate = mtk_adsp_mbox_xlate; + mbox->num_chans = 1; + mbox->chans = devm_kzalloc(mbox->dev, sizeof(*mbox->chans), GFP_KERNEL); + if (!mbox->chans) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "no adsp mbox register resource\n"); + return -ENXIO; + } + + size = resource_size(res); + priv->va_mboxreg = devm_ioremap(dev, (phys_addr_t)res->start, size); + if (IS_ERR(priv->va_mboxreg)) + return PTR_ERR(priv->va_mboxreg); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(dev, irq, + mtk_adsp_ipc_irq_handler, mtk_adsp_ipc_handler, + IRQF_TRIGGER_NONE, dev_name(dev), + mbox->chans); + if (ret < 0) + return ret; + + /* set adsp mbox channel info */ + ch_info = devm_kzalloc(mbox->dev, sizeof(*ch_info), GFP_KERNEL); + if (!ch_info) + return -ENOMEM; + + spin_lock_init(&ch_info->lock); + ch_info->va_reg = priv->va_mboxreg; + mbox->chans->con_priv = ch_info; + platform_set_drvdata(pdev, priv); + ret = devm_mbox_controller_register(dev, &priv->mbox); + if (ret < 0) + dev_err(dev, "error: failed to register mailbox:%d\n", ret); + + return ret; +} + +static const struct of_device_id mtk_adsp_mbox_of_match[] = { + { .compatible = "mediatek,mt8195-adsp-mbox", }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_adsp_mbox_of_match); + +static struct platform_driver mtk_adsp_ipc_mbox_driver = { + .probe = mtk_adsp_mbox_probe, + .driver = { + .name = "mtk_adsp_mbox", + .of_match_table = mtk_adsp_mbox_of_match, + }, +}; +module_platform_driver(mtk_adsp_ipc_mbox_driver); + +MODULE_AUTHOR("Allen-KH Cheng "); +MODULE_DESCRIPTION("MTK ADSP mailbox IPC driver"); +MODULE_LICENSE("GPL v2");