From patchwork Fri Aug 21 03:54:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rob Herring \(Arm\)" X-Patchwork-Id: 257354 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31CE0C433DF for ; Fri, 21 Aug 2020 03:56:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0CD4520855 for ; Fri, 21 Aug 2020 03:56:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597982181; bh=QAJRo1dUxl6ZxMcVY+55Z74Q9n0PNBDqIEyyugID7fw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=q4SCZD0psIsqOYQEBauaEDi+zqMQvr3gM4dp2WWBWGphuXumnPUkd2ciG9iIh2m1b IGP8G8Vbfj4vvZH28kKLOghhVYi/cm2osL3ABlxks0vz1uuP4yJOwbuMBib7SHcKx1 apLluR2UGFUw+neIHxcDKYafQbGFvwDozfyu1bKk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728033AbgHUD4U (ORCPT ); Thu, 20 Aug 2020 23:56:20 -0400 Received: from mail-io1-f68.google.com ([209.85.166.68]:41129 "EHLO mail-io1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727125AbgHUD4T (ORCPT ); Thu, 20 Aug 2020 23:56:19 -0400 Received: by mail-io1-f68.google.com with SMTP id g19so466549ioh.8; Thu, 20 Aug 2020 20:56:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QjZFXqjWXEUTZiaAn5hYHKiqo62LdmVrJplZ+1XIJyE=; b=hB0CWFMU6DtxgaPow+TVykV1dnAabUe4jL+RsUnRGoNbamZLQItSBcjlHkYZbrQNS4 r2kUWH1cSNuT0ihuXbjATKnW7mYOmVt+08OncIxlrl+RRTfNj4s4CmDImTBypCBsH9je 3IfxilfYm4RW6nUt9CXfPNMQnUg9a4Epwq/fnkhA3MP0rNunh438pzgym24EIIhbqj/R 1J+3lLwea/3Cm9ujF6LzZdrGa8+VoJncnd2qaXksj9Ea0YLyypZU1un0MlsvZMzyI6ZU jUjqpF4Q8kB33fYi0KC6gVjVj1SbZ3tmxMA/DgbKqa+AiVX6pBGZgMKmfgZzoDlBR2x6 1gnQ== X-Gm-Message-State: AOAM530OBq+rQHiFk6lodqZmWkO4PbAF4AuUCCfG8IzQjr2FyEtbHokf rYojFjsmfu9dl4Vwc8WTVg== X-Google-Smtp-Source: ABdhPJyQ7RVU1iN+BVye7DF0YMFH38k7wZRJyOkmHLo92bOUBV/bqZiSaIYoT6VXndxQVqniWCKMdw== X-Received: by 2002:a05:6638:e90:: with SMTP id p16mr976888jas.26.1597982178007; Thu, 20 Aug 2020 20:56:18 -0700 (PDT) Received: from xps15.herring.priv ([64.188.179.249]) by smtp.googlemail.com with ESMTPSA id 79sm413923ilc.9.2020.08.20.20.56.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Aug 2020 20:56:17 -0700 (PDT) From: Rob Herring To: Bjorn Helgaas , Lorenzo Pieralisi Cc: linux-pci@vger.kernel.org, Andy Gross , Binghui Wang , Bjorn Andersson , Dilip Kota , Fabio Estevam , Gustavo Pimentel , Jerome Brunet , Jesper Nilsson , Jingoo Han , Jonathan Chocron , Jonathan Hunter , Kevin Hilman , Kishon Vijay Abraham I , Krzysztof Kozlowski , Kukjin Kim , Kunihiko Hayashi , Lucas Stach , Martin Blumenstingl , Masahiro Yamada , Murali Karicheri , Neil Armstrong , NXP Linux Team , Pengutronix Kernel Team , Pratyush Anand , Richard Zhu , Sascha Hauer , Shawn Guo , Shawn Guo , Stanimir Varbanov , Thierry Reding , Xiaowei Song , Yue Wang , Marc Zyngier , linux-amlogic@lists.infradead.org, linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 27/40] PCI: dwc/meson: Rework PCI config and DW port logic register accesses Date: Thu, 20 Aug 2020 21:54:07 -0600 Message-Id: <20200821035420.380495-28-robh@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821035420.380495-1-robh@kernel.org> References: <20200821035420.380495-1-robh@kernel.org> MIME-Version: 1.0 Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org The meson 'elbi' registers are just the Designware 'dbi' space and all the registers accessed are either standard PCI config space or DWC port logic registers. Convert the accesses to use the common defines and register accessors. Cc: Yue Wang Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Kevin Hilman Cc: Jingoo Han Cc: Gustavo Pimentel Cc: linux-amlogic@lists.infradead.org Signed-off-by: Rob Herring --- drivers/pci/controller/dwc/pci-meson.c | 76 +++++++++----------------- 1 file changed, 25 insertions(+), 51 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c index cca423e834e8..33deb290c4e7 100644 --- a/drivers/pci/controller/dwc/pci-meson.c +++ b/drivers/pci/controller/dwc/pci-meson.c @@ -22,11 +22,7 @@ #define to_meson_pcie(x) dev_get_drvdata((x)->dev) -#define PCIE_CAP_OFFSET 0x70 -#define PCIE_DEV_CTRL_DEV_STUS (PCIE_CAP_OFFSET + 0x08) -#define PCIE_CAP_MAX_PAYLOAD_MASK GENMASK(7, 5) #define PCIE_CAP_MAX_PAYLOAD_SIZE(x) ((x) << 5) -#define PCIE_CAP_MAX_READ_REQ_MASK GENMASK(14, 12) #define PCIE_CAP_MAX_READ_REQ_SIZE(x) ((x) << 12) /* PCIe specific config registers */ @@ -56,11 +52,6 @@ enum pcie_data_rate { PCIE_GEN4 }; -struct meson_pcie_mem_res { - void __iomem *elbi_base; - void __iomem *cfg_base; -}; - struct meson_pcie_clk_res { struct clk *clk; struct clk *port_clk; @@ -74,7 +65,7 @@ struct meson_pcie_rc_reset { struct meson_pcie { struct dw_pcie pci; - struct meson_pcie_mem_res mem_res; + void __iomem *cfg_base; struct meson_pcie_clk_res clk_res; struct meson_pcie_rc_reset mrst; struct gpio_desc *reset_gpio; @@ -113,28 +104,18 @@ static int meson_pcie_get_resets(struct meson_pcie *mp) return 0; } -static void __iomem *meson_pcie_get_mem(struct platform_device *pdev, - struct meson_pcie *mp, - const char *id) -{ - struct device *dev = mp->pci.dev; - struct resource *res; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, id); - - return devm_ioremap_resource(dev, res); -} - static int meson_pcie_get_mems(struct platform_device *pdev, struct meson_pcie *mp) { - mp->mem_res.elbi_base = meson_pcie_get_mem(pdev, mp, "elbi"); - if (IS_ERR(mp->mem_res.elbi_base)) - return PTR_ERR(mp->mem_res.elbi_base); + struct dw_pcie *pci = &mp->pci; + + pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "elbi"); + if (IS_ERR(pci->dbi_base)) + return PTR_ERR(pci->dbi_base); - mp->mem_res.cfg_base = meson_pcie_get_mem(pdev, mp, "cfg"); - if (IS_ERR(mp->mem_res.cfg_base)) - return PTR_ERR(mp->mem_res.cfg_base); + mp->cfg_base = devm_platform_ioremap_resource_byname(pdev, "cfg"); + if (IS_ERR(mp->cfg_base)) + return PTR_ERR(mp->cfg_base); return 0; } @@ -232,24 +213,14 @@ static int meson_pcie_probe_clocks(struct meson_pcie *mp) return 0; } -static inline void meson_elb_writel(struct meson_pcie *mp, u32 val, u32 reg) -{ - writel(val, mp->mem_res.elbi_base + reg); -} - -static inline u32 meson_elb_readl(struct meson_pcie *mp, u32 reg) -{ - return readl(mp->mem_res.elbi_base + reg); -} - static inline u32 meson_cfg_readl(struct meson_pcie *mp, u32 reg) { - return readl(mp->mem_res.cfg_base + reg); + return readl(mp->cfg_base + reg); } static inline void meson_cfg_writel(struct meson_pcie *mp, u32 val, u32 reg) { - writel(val, mp->mem_res.cfg_base + reg); + writel(val, mp->cfg_base + reg); } static void meson_pcie_assert_reset(struct meson_pcie *mp) @@ -287,30 +258,34 @@ static int meson_size_to_payload(struct meson_pcie *mp, int size) static void meson_set_max_payload(struct meson_pcie *mp, int size) { + struct dw_pcie *pci = &mp->pci; u32 val; + u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); int max_payload_size = meson_size_to_payload(mp, size); - val = meson_elb_readl(mp, PCIE_DEV_CTRL_DEV_STUS); - val &= ~PCIE_CAP_MAX_PAYLOAD_MASK; - meson_elb_writel(mp, val, PCIE_DEV_CTRL_DEV_STUS); + val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_DEVCTL); + val &= ~PCI_EXP_DEVCTL_PAYLOAD; + dw_pcie_writel_dbi(pci, offset + PCI_EXP_DEVCTL, val); - val = meson_elb_readl(mp, PCIE_DEV_CTRL_DEV_STUS); + val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_DEVCTL); val |= PCIE_CAP_MAX_PAYLOAD_SIZE(max_payload_size); - meson_elb_writel(mp, val, PCIE_DEV_CTRL_DEV_STUS); + dw_pcie_writel_dbi(pci, offset + PCI_EXP_DEVCTL, val); } static void meson_set_max_rd_req_size(struct meson_pcie *mp, int size) { + struct dw_pcie *pci = &mp->pci; u32 val; + u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); int max_rd_req_size = meson_size_to_payload(mp, size); - val = meson_elb_readl(mp, PCIE_DEV_CTRL_DEV_STUS); - val &= ~PCIE_CAP_MAX_READ_REQ_MASK; - meson_elb_writel(mp, val, PCIE_DEV_CTRL_DEV_STUS); + val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_DEVCTL); + val &= ~PCI_EXP_DEVCTL_READRQ; + dw_pcie_writel_dbi(pci, offset + PCI_EXP_DEVCTL, val); - val = meson_elb_readl(mp, PCIE_DEV_CTRL_DEV_STUS); + val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_DEVCTL); val |= PCIE_CAP_MAX_READ_REQ_SIZE(max_rd_req_size); - meson_elb_writel(mp, val, PCIE_DEV_CTRL_DEV_STUS); + dw_pcie_writel_dbi(pci, offset + PCI_EXP_DEVCTL, val); } static int meson_pcie_establish_link(struct meson_pcie *mp) @@ -436,7 +411,6 @@ static int meson_add_pcie_port(struct meson_pcie *mp, } pp->ops = &meson_pcie_host_ops; - pci->dbi_base = mp->mem_res.elbi_base; ret = dw_pcie_host_init(pp); if (ret) {