From patchwork Mon Aug 3 10:21:17 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 6928621 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 450E09F38B for ; Mon, 3 Aug 2015 10:26:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0E15320547 for ; Mon, 3 Aug 2015 10:26:00 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BA9E4203AB for ; Mon, 3 Aug 2015 10:25:58 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZMCuK-000244-BF; Mon, 03 Aug 2015 10:23:48 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZMCtS-0001CZ-5K; Mon, 03 Aug 2015 10:23:00 +0000 X-Listener-Flag: 11101 Received: from mtkhts09.mediatek.inc [(172.21.101.70)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1944719381; Mon, 03 Aug 2015 18:22:31 +0800 Received: from mhfsdcap03.mhfswrd (10.17.3.153) by mtkhts09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Mon, 3 Aug 2015 18:22:30 +0800 From: Yong Wu To: Joerg Roedel , Thierry Reding , Mark Rutland , Matthias Brugger Subject: [PATCH v4 4/6] memory: mediatek: Add SMI driver Date: Mon, 3 Aug 2015 18:21:17 +0800 Message-ID: <1438597279-2937-5-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1438597279-2937-1-git-send-email-yong.wu@mediatek.com> References: <1438597279-2937-1-git-send-email-yong.wu@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-20150803_032255_038963_EAD54F48 X-CRM114-Status: GOOD ( 25.70 ) X-Spam-Score: -1.1 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: k.zhang@mediatek.com, devicetree@vger.kernel.org, pebolle@tiscali.nl, frederic.chen@mediatek.com, mitchelh@codeaurora.org, arnd@arndb.de, srv_heupstream@mediatek.com, Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org, Tomasz Figa , iommu@lists.linux-foundation.org, Rob Herring , Daniel Kurtz , Yong Wu , Sasha Hauer , linux-mediatek@lists.infradead.org, youhua.li@mediatek.com, Robin Murphy , linux-arm-kernel@lists.infradead.org, Lucas Stach Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch add SMI(Smart Multimedia Interface) driver. This driver is responsible to enable/disable iommu and control the clocks of each local arbiter Signed-off-by: Yong Wu --- drivers/memory/Kconfig | 8 ++ drivers/memory/Makefile | 1 + drivers/memory/mtk-smi.c | 285 +++++++++++++++++++++++++++++++++++++++++++++ include/soc/mediatek/smi.h | 60 ++++++++++ 4 files changed, 354 insertions(+) create mode 100644 drivers/memory/mtk-smi.c create mode 100644 include/soc/mediatek/smi.h diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index 8406c668..c0e1607 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -100,6 +100,14 @@ config JZ4780_NEMC the Ingenic JZ4780. This controller is used to handle external memory devices such as NAND and SRAM. +config MTK_SMI + bool + depends on ARCH_MEDIATEK || COMPILE_TEST + help + This driver is for the Memory Controller module in MediaTek SoCs, + mainly help enable/disable iommu and control the clock for each + local arbiter. + source "drivers/memory/tegra/Kconfig" endif diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index b670441..f854e40 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -14,5 +14,6 @@ obj-$(CONFIG_FSL_IFC) += fsl_ifc.o obj-$(CONFIG_MVEBU_DEVBUS) += mvebu-devbus.o obj-$(CONFIG_TEGRA20_MC) += tegra20-mc.o obj-$(CONFIG_JZ4780_NEMC) += jz4780-nemc.o +obj-$(CONFIG_MTK_SMI) += mtk-smi.o obj-$(CONFIG_TEGRA_MC) += tegra/ diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c new file mode 100644 index 0000000..e62cceb --- /dev/null +++ b/drivers/memory/mtk-smi.c @@ -0,0 +1,285 @@ +/* + * Copyright (c) 2014-2015 MediaTek Inc. + * Author: Yong Wu + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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 +#include + +#define SMI_LARB_MMU_EN 0xf00 +#define F_SMI_MMU_EN(port) BIT(port) + +struct mtk_smi_common { + struct clk *clk_apb; + struct clk *clk_smi; +}; + +struct mtk_smi_larb { + void __iomem *base; + struct clk *clk_apb; + struct clk *clk_smi; + struct device *smi; +}; + +struct mtk_larb_mmu { + u32 mmu; +}; + +static int mtk_smi_common_get(struct device *smidev) +{ + struct mtk_smi_common *smipriv = dev_get_drvdata(smidev); + int ret; + + ret = pm_runtime_get_sync(smidev); + if (ret < 0) + return ret; + + ret = clk_prepare_enable(smipriv->clk_apb); + if (ret) { + dev_err(smidev, "Failed to enable the apb clock\n"); + goto err_put_pm; + } + ret = clk_prepare_enable(smipriv->clk_smi); + if (ret) { + dev_err(smidev, "Failed to enable the smi clock\n"); + goto err_disable_apb; + } + return ret; + +err_disable_apb: + clk_disable_unprepare(smipriv->clk_apb); +err_put_pm: + pm_runtime_put(smidev); + return ret; +} + +static void mtk_smi_common_put(struct device *smidev) +{ + struct mtk_smi_common *smipriv = dev_get_drvdata(smidev); + + clk_disable_unprepare(smipriv->clk_smi); + clk_disable_unprepare(smipriv->clk_apb); + pm_runtime_put(smidev); +} + +int mtk_smi_larb_get(struct device *larbdev) +{ + struct mtk_smi_larb *larbpriv = dev_get_drvdata(larbdev); + struct mtk_larb_mmu *mmucfg = larbdev->archdata.iommu; + int ret; + + ret = mtk_smi_common_get(larbpriv->smi); + if (ret) + return ret; + + ret = pm_runtime_get_sync(larbdev); + if (ret < 0) + goto err_put_smicommon; + + ret = clk_prepare_enable(larbpriv->clk_apb); + if (ret) { + dev_err(larbdev, "Failed to enable the apb clock\n"); + goto err_put_pm; + } + + ret = clk_prepare_enable(larbpriv->clk_smi); + if (ret) { + dev_err(larbdev, "Failed to enable the smi clock\n"); + goto err_disable_apb; + } + + /* config iommu */ + writel_relaxed(mmucfg->mmu, larbpriv->base + SMI_LARB_MMU_EN); + + return ret; + +err_disable_apb: + clk_disable_unprepare(larbpriv->clk_apb); +err_put_pm: + pm_runtime_put(larbdev); +err_put_smicommon: + mtk_smi_common_put(larbpriv->smi); + return ret; +} + +void mtk_smi_larb_put(struct device *larbdev) +{ + struct mtk_smi_larb *larbpriv = dev_get_drvdata(larbdev); + + clk_disable_unprepare(larbpriv->clk_smi); + clk_disable_unprepare(larbpriv->clk_apb); + pm_runtime_put(larbdev); + mtk_smi_common_put(larbpriv->smi); +} + +int mtk_smi_config_port(struct device *larbdev, unsigned int larbportid, + bool enable) +{ + struct mtk_larb_mmu *mmucfg = larbdev->archdata.iommu; + + if (!mmucfg) { + mmucfg = kzalloc(sizeof(*mmucfg), GFP_KERNEL); + if (!mmucfg) + return -ENOMEM; + larbdev->archdata.iommu = mmucfg; + } + + dev_dbg(larbdev, "%s iommu port id %d\n", + enable ? "enable" : "disable", larbportid); + + if (enable) + mmucfg->mmu |= F_SMI_MMU_EN(larbportid); + else + mmucfg->mmu &= ~F_SMI_MMU_EN(larbportid); + + return 0; +} + +static int mtk_smi_larb_probe(struct platform_device *pdev) +{ + struct mtk_smi_larb *larbpriv; + struct resource *res; + struct device *dev = &pdev->dev; + struct device_node *smi_node; + struct platform_device *smi_pdev; + + larbpriv = devm_kzalloc(dev, sizeof(*larbpriv), GFP_KERNEL); + if (!larbpriv) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + larbpriv->base = devm_ioremap_resource(dev, res); + if (IS_ERR(larbpriv->base)) + return PTR_ERR(larbpriv->base); + + larbpriv->clk_apb = devm_clk_get(dev, "apb"); + if (IS_ERR(larbpriv->clk_apb)) + return PTR_ERR(larbpriv->clk_apb); + + larbpriv->clk_smi = devm_clk_get(dev, "smi"); + if (IS_ERR(larbpriv->clk_smi)) + return PTR_ERR(larbpriv->clk_smi); + + smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0); + if (!smi_node) + return -EINVAL; + + smi_pdev = of_find_device_by_node(smi_node); + of_node_put(smi_node); + if (smi_pdev) { + larbpriv->smi = &smi_pdev->dev; + } else { + dev_err(dev, "Failed to get the smi_common device\n"); + return -EINVAL; + } + + pm_runtime_enable(dev); + dev_set_drvdata(dev, larbpriv); + return 0; +} + +static int mtk_smi_larb_remove(struct platform_device *pdev) +{ + struct mtk_larb_mmu *mmucfg = pdev->dev.archdata.iommu; + + kfree(mmucfg); + pm_runtime_disable(&pdev->dev); + return 0; +} + +static const struct of_device_id mtk_smi_larb_of_ids[] = { + { .compatible = "mediatek,mt8173-smi-larb",}, + {} +}; + +static struct platform_driver mtk_smi_larb_driver = { + .probe = mtk_smi_larb_probe, + .remove = mtk_smi_larb_remove, + .driver = { + .name = "mtk-smi-larb", + .of_match_table = mtk_smi_larb_of_ids, + } +}; + +static int mtk_smi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_smi_common *smipriv; + int ret; + + smipriv = devm_kzalloc(dev, sizeof(*smipriv), GFP_KERNEL); + if (!smipriv) + return -ENOMEM; + + smipriv->clk_apb = devm_clk_get(dev, "apb"); + if (IS_ERR(smipriv->clk_apb)) + return PTR_ERR(smipriv->clk_apb); + + smipriv->clk_smi = devm_clk_get(dev, "smi"); + if (IS_ERR(smipriv->clk_smi)) + return PTR_ERR(smipriv->clk_smi); + + pm_runtime_enable(dev); + dev_set_drvdata(dev, smipriv); + return ret; +} + +static int mtk_smi_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + return 0; +} + +static const struct of_device_id mtk_smi_of_ids[] = { + { .compatible = "mediatek,mt8173-smi",}, + {} +}; + +static struct platform_driver mtk_smi_driver = { + .probe = mtk_smi_probe, + .remove = mtk_smi_remove, + .driver = { + .name = "mtk-smi", + .of_match_table = mtk_smi_of_ids, + } +}; + +static int __init mtk_smi_init(void) +{ + int ret; + + ret = platform_driver_register(&mtk_smi_driver); + if (ret != 0) { + pr_err("Failed to register SMI driver\n"); + return ret; + } + + ret = platform_driver_register(&mtk_smi_larb_driver); + if (ret != 0) { + pr_err("Failed to register SMI-LARB driver\n"); + goto err_unreg_smi; + } + return ret; + +err_unreg_smi: + platform_driver_unregister(&mtk_smi_driver); + return ret; +} + +subsys_initcall(mtk_smi_init); diff --git a/include/soc/mediatek/smi.h b/include/soc/mediatek/smi.h new file mode 100644 index 0000000..189d575 --- /dev/null +++ b/include/soc/mediatek/smi.h @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2014-2015 MediaTek Inc. + * Author: Yong Wu + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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. + */ +#ifndef MTK_IOMMU_SMI_H +#define MTK_IOMMU_SMI_H + +#include + +#ifdef CONFIG_MTK_SMI + +/* + * Record the iommu info for each port in the local arbiter. + * It is only for iommu. + * + * Returns 0 if successfully, others if failed. + */ +int mtk_smi_config_port(struct device *larbdev, unsigned int larbportid, + bool enable); +/* + * The two function below config iommu and enable/disable the clock + * for the larb. + * + * mtk_smi_larb_get must be called before the multimedia HW work. + * mtk_smi_larb_put must be called after HW done. + * Both should be called in non-atomic context. + * + * Returns 0 if successfully, others if failed. + */ +int mtk_smi_larb_get(struct device *larbdev); +void mtk_smi_larb_put(struct device *larbdev); + +#else + +static int +mtk_smi_config_port(struct device *larbdev, unsigned int larbportid, + bool enable) +{ + return 0; +} + +static inline int mtk_smi_larb_get(struct device *larbdev) +{ + return 0; +} + +static inline void mtk_smi_larb_put(struct device *larbdev) { } + +#endif + +#endif