From nobody Thu Sep 18 20:28:38 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66A2EC4332F for ; Fri, 2 Dec 2022 02:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231922AbiLBCJX (ORCPT ); Thu, 1 Dec 2022 21:09:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231887AbiLBCJU (ORCPT ); Thu, 1 Dec 2022 21:09:20 -0500 Received: from smtpbguseast3.qq.com (smtpbguseast3.qq.com [54.243.244.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93017BDCD5 for ; Thu, 1 Dec 2022 18:09:16 -0800 (PST) X-QQ-mid: bizesmtp83t1669946943t6c3bau7 Received: from localhost ( [202.85.220.39]) by bizesmtp.qq.com (ESMTP) with id ; Fri, 02 Dec 2022 10:09:01 +0800 (CST) X-QQ-SSF: 0140000000000080B000000A0000000 X-QQ-FEAT: CEO3k+BsRkLZAYo3YfPK1U8EaV0nt11rPrIYBPYhQlJVBsb4FvncigvVXi41a qI7R30XUi01xi2j7OxY5JBLopoC77oS++OWu3TMp7F2c8ZSzHJq9AYxTcwwfHtI7c7pwrfA Q9QWEs6/gfs4Se5/H/DJM0OH3QhwNsaKhSNudPEYzMG+/3DA+fGkJQlGQIwKZ/RdXJP6Y+0 FUdYKB4ha9zoHpT+xUP956fVJ2QTIya++dCnCHCJY8P6VndcBEqYvtNjPLpXBzXaAzC7vO8 rW+5Db0uhi6+/lPPxG4fH0mFs18yNPL3mAaS78judpRbkn0h2CwwEZHrebV9e0UathmjxW3 ip50gl8k8dzaIlVh+pwJOXCG6PtxETqryPVnRdo X-QQ-GoodBg: 2 Date: Fri, 2 Dec 2022 10:09:01 +0800 From: Wang Honghui To: Jassi Brar , linux-kernel@vger.kernel.org Subject: [PATCH] Mailbox: add for Phytium FT2000/4 CPUs Message-ID: <9AE980AA9AA0C6D1+Y4lePSm3uZUWsiji@TP-P15V> MIME-Version: 1.0 Content-Disposition: inline X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:ucas.com.cn:qybglogicsvr:qybglogicsvr6 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Mailbox: add for Phytium FT2000/4 CPUs.=20 Signed-off-by: Wang Honghui --- drivers/mailbox/Kconfig | 6 + drivers/mailbox/Makefile | 2 + drivers/mailbox/phytium_mailbox.c | 193 ++++++++++++++++++++++++++++++ 3 files changed, 201 insertions(+) create mode 100644 drivers/mailbox/phytium_mailbox.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 05d6fae800e3..4d08e8ebc831 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -41,6 +41,12 @@ config IMX_MBOX help Mailbox implementation for i.MX Messaging Unit (MU). =20 +config PHYTIUM_MBOX + tristate "Phytium SoC Mailbox Support" + depends on ARM_AMBA || COMPILE_TEST + help + This driver provides the support for the Phytium mailbox control= ler. + config PLATFORM_MHU tristate "Platform MHU Mailbox" depends on OF diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index fc9376117111..e46cb9b29369 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -11,6 +11,8 @@ obj-$(CONFIG_ARM_MHU_V2) +=3D arm_mhuv2.o =20 obj-$(CONFIG_IMX_MBOX) +=3D imx-mailbox.o =20 +obj-$(CONFIG_PHYTIUM_MBOX) +=3D phytium_mailbox.o + obj-$(CONFIG_ARMADA_37XX_RWTM_MBOX) +=3D armada-37xx-rwtm-mailbox.o =20 obj-$(CONFIG_PLATFORM_MHU) +=3D platform_mhu.o diff --git a/drivers/mailbox/phytium_mailbox.c b/drivers/mailbox/phytium_ma= ilbox.c new file mode 100644 index 000000000000..8211db1d2ca0 --- /dev/null +++ b/drivers/mailbox/phytium_mailbox.c @@ -0,0 +1,193 @@ +/* + * Phytium SoC mailbox driver + * + * Copyright (c) 2020 Phytium Corporation. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define INTR_STAT 0x0 +#define INTR_SET 0x8 +#define INTR_CLR 0x10 + +#define TX_REG 0x100 + +#define NR_CHANS 1 + +struct phytium_mbox_link { + unsigned irq; + void __iomem *tx_reg; + void __iomem *rx_reg; +}; + +struct phytium_mbox { + void __iomem *base; + struct phytium_mbox_link mlink; + struct mbox_chan chan; + struct mbox_controller mbox; +}; + +static irqreturn_t phytium_mbox_rx_irq(int irq, void *ch) +{ + struct mbox_chan *chan =3D ch; + struct phytium_mbox_link *mlink =3D chan->con_priv; + u32 val; + + val =3D readl_relaxed(mlink->rx_reg + INTR_STAT); + if (!val) + return IRQ_NONE; + + mbox_chan_received_data(chan, (void *)&val); + + writel_relaxed(val, mlink->rx_reg + INTR_CLR); + + return IRQ_HANDLED; +} + +static int phytium_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct phytium_mbox_link *mlink =3D chan->con_priv; + u32 *arg =3D data; + + writel_relaxed(*arg, mlink->tx_reg + INTR_SET); + + return 0; +} + +static int phytium_mbox_startup(struct mbox_chan *chan) +{ + struct phytium_mbox_link *mlink =3D chan->con_priv; + u32 val; + int ret; + + val =3D readl_relaxed(mlink->tx_reg + INTR_STAT); + writel_relaxed(val, mlink->tx_reg + INTR_CLR); + + ret =3D request_irq(mlink->irq, phytium_mbox_rx_irq, + IRQF_SHARED, "phytium_mbox_link", chan); + if (ret) { + dev_err(chan->mbox->dev, + "Unable to acquire IRQ %d\n", mlink->irq); + } + + return ret; +} + +static void phytium_mbox_shutdown(struct mbox_chan *chan) +{ + struct phytium_mbox_link *mlink =3D chan->con_priv; + + free_irq(mlink->irq, chan); +} + +static bool phytium_mbox_last_tx_done(struct mbox_chan *chan) +{ + struct phytium_mbox_link *mlink =3D chan->con_priv; + u32 val =3D readl_relaxed(mlink->tx_reg + INTR_STAT); + + return (val =3D=3D (u32)(1U << 31)); +} + +static const struct mbox_chan_ops phytium_mbox_ops =3D { + .send_data =3D phytium_mbox_send_data, + .startup =3D phytium_mbox_startup, + .shutdown =3D phytium_mbox_shutdown, + .last_tx_done =3D phytium_mbox_last_tx_done, +}; + +static const struct of_device_id phytium_mbox_of_match[] =3D { + { .compatible =3D "phytium,mbox", }, + { }, +}; +MODULE_DEVICE_TABLE(of, phytium_mbox_of_match); + +static int phytium_mbox_probe(struct platform_device *pdev) +{ + struct phytium_mbox *mbox; + struct resource *res; + int err, irq; + + /* Allocate memory for device */ + mbox =3D devm_kzalloc(&pdev->dev, sizeof(*mbox), GFP_KERNEL); + if (!mbox) + return -ENOMEM; + + res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + mbox->base =3D devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mbox->base)) { + dev_err(&pdev->dev, "ioremap base failed\n"); + return PTR_ERR(mbox->base); + } + + irq =3D platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "cannot obtain irq\n"); + return irq; + } + + mbox->chan.con_priv =3D &mbox->mlink; + mbox->mlink.irq =3D irq; + mbox->mlink.rx_reg =3D mbox->base; + mbox->mlink.tx_reg =3D mbox->mlink.rx_reg + TX_REG; + + mbox->mbox.dev =3D &pdev->dev; + mbox->mbox.chans =3D &mbox->chan; + mbox->mbox.num_chans =3D NR_CHANS; + mbox->mbox.ops =3D &phytium_mbox_ops; + mbox->mbox.txdone_irq =3D false; + mbox->mbox.txdone_poll =3D true; + mbox->mbox.txpoll_period =3D 1; + + platform_set_drvdata(pdev, mbox); + + err =3D mbox_controller_register(&mbox->mbox); + if (err) { + dev_err(&pdev->dev, "Failed to register mailboxes %d\n", err); + goto fail; + } + + dev_info(&pdev->dev, "Phytium SoC Mailbox registered\n"); +fail: + return err; +} + +static int phytium_mbox_remove(struct platform_device *pdev) +{ + struct phytium_mbox *mbox =3D platform_get_drvdata(pdev); + + mbox_controller_unregister(&mbox->mbox); + + return 0; +} + +static struct platform_driver phytium_mbox_driver =3D { + .probe =3D phytium_mbox_probe, + .remove =3D phytium_mbox_remove, + .driver =3D { + .name =3D "phytium-mbox", + .of_match_table =3D of_match_ptr(phytium_mbox_of_match), + }, +}; + +module_platform_driver(phytium_mbox_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Phytium SoC Mailbox Driver"); +MODULE_AUTHOR("Chen Baozi "); --=20 2.34.1