From patchwork Thu Jul 8 15:50:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 12365513 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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 85094C07E9C for ; Thu, 8 Jul 2021 15:51:12 +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 42AF6616EA for ; Thu, 8 Jul 2021 15:51:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 42AF6616EA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-phy-bounces+linux-phy=archiver.kernel.org@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: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=h80jmqd970CVB1pp3XyUjZO3+AEiz89wBap2LcnxelA=; b=YXr1Srmxn21tjg ckr4DLNxkKlautwPW7o30jGpbU6/x8fHy3yowjzROxQ0NekBib8vksvS261pNKdkvS3eU6CY5z/u1 ktk6DWzcfuNcur4cDX8IGPXSP7GE8Bgtb01gPJ11ITxyYj6fs/rWsqKCXumivHL3KNff8QcbP4FVj GDg93EwBJatupFfB4oPrDMnjM/rcABeJk7Enld44l1QjwgdisT0h7tCbE8IMRs1ERHdb1P6JgvXAF 0RBAfvlXoh19x5TfvcsH3zoxJtusQw2nEkOgtCCXyqYCgwC1boFDKksc7ZPEvlO5u50QBxLkRbf61 7fNCX73RwOkmcZPj/Hdg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m1WIx-00HJwd-QH; Thu, 08 Jul 2021 15:51:11 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m1WID-00HJiX-Ue; Thu, 08 Jul 2021 15:50:33 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id B18E661876; Thu, 8 Jul 2021 15:50:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625759425; bh=dIdQcX5DKBBmC+uRfrn1EQ2+m9spgR1YXH5QDt8leYc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gnql1A8IG4Mb+xvvABIhnQz9WDdVy6TA2vlgwJ/bRKhCg6/lRc/x3Q83qncgHYGEt QJtXhInuAryGbBaVtQR0X65OaNrfqb227MMcxX9bpzIiJm/6VWsJe9n3gTSRGWRfdg XrWkQau2I34oiCrZwlchnShsxr65x0kO9rvd/rrO6+kfvxmy5Jl1xvxXgxkNAwju47 94j0aOK8oAzvJEzX0KoR/gX3LmGvlud/yGCpufmBs6rBaktLM6qjxS9DxiM1MPOf0F 55CF2nKhmSIe2pYgQeuMrIuaW46GIvA4ptXIt1rEm7OR9UKyIgDUbaPZIJ8triFJrY FlsKihvQjwEAA== Received: by mail.kernel.org with local (Exim 4.94.2) (envelope-from ) id 1m1WI4-008VV3-D8; Thu, 08 Jul 2021 17:50:16 +0200 From: Mauro Carvalho Chehab To: Manivannan Sadhasivam , Rob Herring Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , =?utf-8?q?Krzysztof_Wilc?= =?utf-8?q?zy=C5=84ski?= , Binghui Wang , Bjorn Helgaas , Kishon Vijay Abraham I , Lorenzo Pieralisi , Rob Herring , Vinod Koul , Wei Xu , Xiaowei Song , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-phy@lists.infradead.org Subject: [PATCH RFC 1/7] PCI: kirin: split PHY interface from the driver Date: Thu, 8 Jul 2021 17:50:08 +0200 Message-Id: <32bbb1b50c6adae5848cc5039476e041dadf8b20.1625758732.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210708_085026_074465_E4A3E641 X-CRM114-Status: GOOD ( 29.18 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org The pcie-kirin PCIe driver contains internally a PHY interface for a Hikey 960. As we'll be adding support also for Hikey 970, we need to first split the PHY into a separate driver. Signed-off-by: Mauro Carvalho Chehab --- arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 24 +- drivers/pci/controller/dwc/pcie-kirin.c | 206 +++------------- drivers/phy/hisilicon/Kconfig | 10 + drivers/phy/hisilicon/Makefile | 1 + drivers/phy/hisilicon/phy-hi3660-pcie.c | 273 ++++++++++++++++++++++ 5 files changed, 333 insertions(+), 181 deletions(-) create mode 100644 drivers/phy/hisilicon/phy-hi3660-pcie.c diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi index 53890e8052a7..3a589fa4ca81 100644 --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi @@ -1001,17 +1001,28 @@ spi3: spi@ff3b3000 { status = "disabled"; }; + pcie_phy: pcie-phy@f3f2000 { + compatible = "hisilicon,hi960-pcie-phy"; + reg = <0x0 0xf3f20000 0x0 0x40000>; + reg-names = "phy"; + clocks = <&crg_ctrl HI3660_PCIEPHY_REF>, + <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>; + clock-names = "pcie_phy_ref", "pcie_apb_phy"; + reset-gpios = <&gpio11 1 0 >; + #phy-cells = <0>; + }; + pcie@f4000000 { compatible = "hisilicon,kirin960-pcie"; reg = <0x0 0xf4000000 0x0 0x1000>, <0x0 0xff3fe000 0x0 0x1000>, - <0x0 0xf3f20000 0x0 0x40000>, <0x0 0xf5000000 0x0 0x2000>; - reg-names = "dbi", "apb", "phy", "config"; + reg-names = "dbi", "apb", "config"; bus-range = <0x0 0x1>; #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + phys = <&pcie_phy>; ranges = <0x02000000 0x0 0x00000000 0x0 0xf6000000 0x0 0x02000000>; @@ -1028,15 +1039,10 @@ &gic GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>, &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>, <0x0 0 0 4 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>; - clocks = <&crg_ctrl HI3660_PCIEPHY_REF>, - <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>, - <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>, + clocks = <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>, <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>, <&crg_ctrl HI3660_ACLK_GATE_PCIE>; - clock-names = "pcie_phy_ref", "pcie_aux", - "pcie_apb_phy", "pcie_apb_sys", - "pcie_aclk"; - reset-gpios = <&gpio11 1 0 >; + clock-names = "pcie_aux", "pcie_apb_sys", "pcie_aclk"; }; /* UFS */ diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c index 026fd1e42a55..0b2415edea04 100644 --- a/drivers/pci/controller/dwc/pcie-kirin.c +++ b/drivers/pci/controller/dwc/pcie-kirin.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -28,26 +29,17 @@ #define to_kirin_pcie(x) dev_get_drvdata((x)->dev) -#define REF_CLK_FREQ 100000000 - /* PCIe ELBI registers */ #define SOC_PCIECTRL_CTRL0_ADDR 0x000 #define SOC_PCIECTRL_CTRL1_ADDR 0x004 -#define SOC_PCIEPHY_CTRL2_ADDR 0x008 -#define SOC_PCIEPHY_CTRL3_ADDR 0x00c #define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21) /* info located in APB */ #define PCIE_APP_LTSSM_ENABLE 0x01c -#define PCIE_APB_PHY_CTRL0 0x0 -#define PCIE_APB_PHY_CTRL1 0x4 #define PCIE_APB_PHY_STATUS0 0x400 #define PCIE_LINKUP_ENABLE (0x8020) #define PCIE_LTSSM_ENABLE_BIT (0x1 << 11) #define PIPE_CLK_STABLE (0x1 << 19) -#define PHY_REF_PAD_BIT (0x1 << 8) -#define PHY_PWR_DOWN_BIT (0x1 << 22) -#define PHY_RST_ACK_BIT (0x1 << 16) /* info located in sysctrl */ #define SCTRL_PCIE_CMOS_OFFSET 0x60 @@ -60,36 +52,12 @@ #define PCIE_DEBOUNCE_PARAM 0xF0F400 #define PCIE_OE_BYPASS (0x3 << 28) -/* peri_crg ctrl */ -#define CRGCTRL_PCIE_ASSERT_OFFSET 0x88 -#define CRGCTRL_PCIE_ASSERT_BIT 0x8c000000 - -/* Time for delay */ -#define REF_2_PERST_MIN 20000 -#define REF_2_PERST_MAX 25000 -#define PERST_2_ACCESS_MIN 10000 -#define PERST_2_ACCESS_MAX 12000 -#define LINK_WAIT_MIN 900 -#define LINK_WAIT_MAX 1000 -#define PIPE_CLK_WAIT_MIN 550 -#define PIPE_CLK_WAIT_MAX 600 -#define TIME_CMOS_MIN 100 -#define TIME_CMOS_MAX 105 -#define TIME_PHY_PD_MIN 10 -#define TIME_PHY_PD_MAX 11 - struct kirin_pcie { struct dw_pcie *pci; + struct phy *phy; void __iomem *apb_base; - void __iomem *phy_base; - struct regmap *crgctrl; - struct regmap *sysctrl; struct clk *apb_sys_clk; - struct clk *apb_phy_clk; - struct clk *phy_ref_clk; - struct clk *pcie_aclk; struct clk *pcie_aux_clk; - int gpio_id_reset; }; /* Registers in PCIeCTRL */ @@ -104,43 +72,19 @@ static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg) return readl(kirin_pcie->apb_base + reg); } -/* Registers in PCIePHY */ -static inline void kirin_apb_phy_writel(struct kirin_pcie *kirin_pcie, - u32 val, u32 reg) -{ - writel(val, kirin_pcie->phy_base + reg); -} - -static inline u32 kirin_apb_phy_readl(struct kirin_pcie *kirin_pcie, u32 reg) -{ - return readl(kirin_pcie->phy_base + reg); -} - static long kirin_pcie_get_clk(struct kirin_pcie *kirin_pcie, struct platform_device *pdev) { struct device *dev = &pdev->dev; - kirin_pcie->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref"); - if (IS_ERR(kirin_pcie->phy_ref_clk)) - return PTR_ERR(kirin_pcie->phy_ref_clk); - kirin_pcie->pcie_aux_clk = devm_clk_get(dev, "pcie_aux"); if (IS_ERR(kirin_pcie->pcie_aux_clk)) return PTR_ERR(kirin_pcie->pcie_aux_clk); - kirin_pcie->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy"); - if (IS_ERR(kirin_pcie->apb_phy_clk)) - return PTR_ERR(kirin_pcie->apb_phy_clk); - kirin_pcie->apb_sys_clk = devm_clk_get(dev, "pcie_apb_sys"); if (IS_ERR(kirin_pcie->apb_sys_clk)) return PTR_ERR(kirin_pcie->apb_sys_clk); - kirin_pcie->pcie_aclk = devm_clk_get(dev, "pcie_aclk"); - if (IS_ERR(kirin_pcie->pcie_aclk)) - return PTR_ERR(kirin_pcie->pcie_aclk); - return 0; } @@ -152,62 +96,9 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie, if (IS_ERR(kirin_pcie->apb_base)) return PTR_ERR(kirin_pcie->apb_base); - kirin_pcie->phy_base = - devm_platform_ioremap_resource_byname(pdev, "phy"); - if (IS_ERR(kirin_pcie->phy_base)) - return PTR_ERR(kirin_pcie->phy_base); - - kirin_pcie->crgctrl = - syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl"); - if (IS_ERR(kirin_pcie->crgctrl)) - return PTR_ERR(kirin_pcie->crgctrl); - - kirin_pcie->sysctrl = - syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl"); - if (IS_ERR(kirin_pcie->sysctrl)) - return PTR_ERR(kirin_pcie->sysctrl); - return 0; } -static int kirin_pcie_phy_init(struct kirin_pcie *kirin_pcie) -{ - struct device *dev = kirin_pcie->pci->dev; - u32 reg_val; - - reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1); - reg_val &= ~PHY_REF_PAD_BIT; - kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1); - - reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL0); - reg_val &= ~PHY_PWR_DOWN_BIT; - kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL0); - usleep_range(TIME_PHY_PD_MIN, TIME_PHY_PD_MAX); - - reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1); - reg_val &= ~PHY_RST_ACK_BIT; - kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1); - - usleep_range(PIPE_CLK_WAIT_MIN, PIPE_CLK_WAIT_MAX); - reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_STATUS0); - if (reg_val & PIPE_CLK_STABLE) { - dev_err(dev, "PIPE clk is not stable\n"); - return -EINVAL; - } - - return 0; -} - -static void kirin_pcie_oe_enable(struct kirin_pcie *kirin_pcie) -{ - u32 val; - - regmap_read(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, &val); - val |= PCIE_DEBOUNCE_PARAM; - val &= ~PCIE_OE_BYPASS; - regmap_write(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, val); -} - static int kirin_pcie_clk_ctrl(struct kirin_pcie *kirin_pcie, bool enable) { int ret = 0; @@ -215,25 +106,9 @@ static int kirin_pcie_clk_ctrl(struct kirin_pcie *kirin_pcie, bool enable) if (!enable) goto close_clk; - ret = clk_set_rate(kirin_pcie->phy_ref_clk, REF_CLK_FREQ); - if (ret) - return ret; - - ret = clk_prepare_enable(kirin_pcie->phy_ref_clk); - if (ret) - return ret; - ret = clk_prepare_enable(kirin_pcie->apb_sys_clk); if (ret) - goto apb_sys_fail; - - ret = clk_prepare_enable(kirin_pcie->apb_phy_clk); - if (ret) - goto apb_phy_fail; - - ret = clk_prepare_enable(kirin_pcie->pcie_aclk); - if (ret) - goto aclk_fail; + return ret; ret = clk_prepare_enable(kirin_pcie->pcie_aux_clk); if (ret) @@ -244,13 +119,7 @@ static int kirin_pcie_clk_ctrl(struct kirin_pcie *kirin_pcie, bool enable) close_clk: clk_disable_unprepare(kirin_pcie->pcie_aux_clk); aux_clk_fail: - clk_disable_unprepare(kirin_pcie->pcie_aclk); -aclk_fail: - clk_disable_unprepare(kirin_pcie->apb_phy_clk); -apb_phy_fail: clk_disable_unprepare(kirin_pcie->apb_sys_clk); -apb_sys_fail: - clk_disable_unprepare(kirin_pcie->phy_ref_clk); return ret; } @@ -259,41 +128,18 @@ static int kirin_pcie_power_on(struct kirin_pcie *kirin_pcie) { int ret; - /* Power supply for Host */ - regmap_write(kirin_pcie->sysctrl, - SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT); - usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX); - kirin_pcie_oe_enable(kirin_pcie); + ret = phy_init(kirin_pcie->phy); + if (ret) + return ret; ret = kirin_pcie_clk_ctrl(kirin_pcie, true); if (ret) return ret; - /* ISO disable, PCIeCtrl, PHY assert and clk gate clear */ - regmap_write(kirin_pcie->sysctrl, - SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT); - regmap_write(kirin_pcie->crgctrl, - CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT); - regmap_write(kirin_pcie->sysctrl, - SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT); - - ret = kirin_pcie_phy_init(kirin_pcie); + ret = phy_power_on(kirin_pcie->phy); if (ret) - goto close_clk; + kirin_pcie_clk_ctrl(kirin_pcie, false); - /* perst assert Endpoint */ - if (!gpio_request(kirin_pcie->gpio_id_reset, "pcie_perst")) { - usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX); - ret = gpio_direction_output(kirin_pcie->gpio_id_reset, 1); - if (ret) - goto close_clk; - usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX); - - return 0; - } - -close_clk: - kirin_pcie_clk_ctrl(kirin_pcie, false); return ret; } @@ -448,26 +294,41 @@ static int kirin_pcie_probe(struct platform_device *pdev) if (ret) return ret; + kirin_pcie->phy = devm_of_phy_get(dev, dev->of_node, NULL); + if (IS_ERR(kirin_pcie->phy)) + return PTR_ERR(kirin_pcie->phy); + ret = kirin_pcie_get_resource(kirin_pcie, pdev); if (ret) return ret; - kirin_pcie->gpio_id_reset = of_get_named_gpio(dev->of_node, - "reset-gpios", 0); - if (kirin_pcie->gpio_id_reset == -EPROBE_DEFER) { - return -EPROBE_DEFER; - } else if (!gpio_is_valid(kirin_pcie->gpio_id_reset)) { - dev_err(dev, "unable to get a valid gpio pin\n"); - return -ENODEV; - } - ret = kirin_pcie_power_on(kirin_pcie); if (ret) return ret; platform_set_drvdata(pdev, kirin_pcie); - return dw_pcie_host_init(&pci->pp); + ret = dw_pcie_host_init(&pci->pp); + if (ret) { + phy_power_off(kirin_pcie->phy); + goto err; + } + + return 0; +err: + phy_exit(kirin_pcie->phy); + + return ret; +} + +static int __exit kirin_pcie_remove(struct platform_device *pdev) +{ + struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev); + + phy_power_off(kirin_pcie->phy); + phy_exit(kirin_pcie->phy); + + return 0; } static const struct of_device_id kirin_pcie_match[] = { @@ -477,6 +338,7 @@ static const struct of_device_id kirin_pcie_match[] = { static struct platform_driver kirin_pcie_driver = { .probe = kirin_pcie_probe, + .remove = __exit_p(kirin_pcie_remove), .driver = { .name = "kirin-pcie", .of_match_table = kirin_pcie_match, diff --git a/drivers/phy/hisilicon/Kconfig b/drivers/phy/hisilicon/Kconfig index 4d008cfc279c..c0725907e2cb 100644 --- a/drivers/phy/hisilicon/Kconfig +++ b/drivers/phy/hisilicon/Kconfig @@ -23,6 +23,16 @@ config PHY_HI3660_USB To compile this driver as a module, choose M here. +config PHY_HI3660_PCIE + tristate "hi3660 PCIe PHY support" + depends on (ARCH_HISI && ARM64) || COMPILE_TEST + select GENERIC_PHY + select MFD_SYSCON + help + Enable this to support the HISILICON HI3660 PCIe PHY. + + To compile this driver as a module, choose M here. + config PHY_HI3670_USB tristate "hi3670 USB PHY support" depends on (ARCH_HISI && ARM64) || COMPILE_TEST diff --git a/drivers/phy/hisilicon/Makefile b/drivers/phy/hisilicon/Makefile index 51729868145b..3c3d70dd7469 100644 --- a/drivers/phy/hisilicon/Makefile +++ b/drivers/phy/hisilicon/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_PHY_HI6220_USB) += phy-hi6220-usb.o obj-$(CONFIG_PHY_HI3660_USB) += phy-hi3660-usb3.o +obj-$(CONFIG_PHY_HI3660_PCIE) += phy-hi3660-pcie.o obj-$(CONFIG_PHY_HI3670_USB) += phy-hi3670-usb3.o obj-$(CONFIG_PHY_HISTB_COMBPHY) += phy-histb-combphy.o obj-$(CONFIG_PHY_HISI_INNO_USB2) += phy-hisi-inno-usb2.o diff --git a/drivers/phy/hisilicon/phy-hi3660-pcie.c b/drivers/phy/hisilicon/phy-hi3660-pcie.c new file mode 100644 index 000000000000..e8768c656d32 --- /dev/null +++ b/drivers/phy/hisilicon/phy-hi3660-pcie.c @@ -0,0 +1,273 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCIe phy driver for Kirin 960 + * + * Copyright (C) 2017 HiSilicon Electronics Co., Ltd. + * https://www.huawei.com + * + * Copyright (C) 2021 Huawei Electronics Co., Ltd. + * https://www.huawei.com + * + * Author: + * Mauro Carvalho Chehab + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define REF_CLK_FREQ 100000000 + +/* info located in APB PHY */ +#define PCIE_APB_PHY_CTRL0 0x0 +#define PCIE_APB_PHY_CTRL1 0x4 +#define PCIE_APB_PHY_STATUS0 0x400 +#define PIPE_CLK_STABLE BIT(19) +#define PHY_REF_PAD_BIT BIT(8) +#define PHY_PWR_DOWN_BIT BIT(22) +#define PHY_RST_ACK_BIT BIT(16) + +/* info located in sysctrl */ +#define SCTRL_PCIE_CMOS_OFFSET 0x60 +#define SCTRL_PCIE_CMOS_BIT 0x10 +#define SCTRL_PCIE_ISO_OFFSET 0x44 +#define SCTRL_PCIE_ISO_BIT 0x30 +#define SCTRL_PCIE_HPCLK_OFFSET 0x190 +#define SCTRL_PCIE_HPCLK_BIT 0x184000 +#define SCTRL_PCIE_OE_OFFSET 0x14a +#define PCIE_DEBOUNCE_PARAM 0xF0F400 +#define PCIE_OE_BYPASS (0x3 << 28) + +/* peri_crg ctrl */ +#define CRGCTRL_PCIE_ASSERT_OFFSET 0x88 +#define CRGCTRL_PCIE_ASSERT_BIT 0x8c000000 + +/* Time for delay */ +#define REF_2_PERST_MIN 20000 +#define REF_2_PERST_MAX 25000 +#define PERST_2_ACCESS_MIN 10000 +#define PERST_2_ACCESS_MAX 12000 +#define PIPE_CLK_WAIT_MIN 550 +#define PIPE_CLK_WAIT_MAX 600 +#define TIME_CMOS_MIN 100 +#define TIME_CMOS_MAX 105 +#define TIME_PHY_PD_MIN 10 +#define TIME_PHY_PD_MAX 11 + +struct hi3660_pcie_phy { + struct device *dev; + void __iomem *base; + struct regmap *crgctrl; + struct regmap *sysctrl; + struct clk *phy_ref_clk; + struct clk *apb_phy_clk; + struct clk *pcie_aclk; + int gpio_id_reset; +}; + +/* Registers in PCIePHY */ +static inline void kirin_apb_phy_writel(struct hi3660_pcie_phy *hi3660_pcie_phy, + u32 val, u32 reg) +{ + writel(val, hi3660_pcie_phy->base + reg); +} + +static inline u32 kirin_apb_phy_readl(struct hi3660_pcie_phy *hi3660_pcie_phy, + u32 reg) +{ + return readl(hi3660_pcie_phy->base + reg); +} + +static void hi3660_pcie_phy_oe_enable(struct hi3660_pcie_phy *phy) +{ + u32 val; + + regmap_read(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, &val); + val |= PCIE_DEBOUNCE_PARAM; + val &= ~PCIE_OE_BYPASS; + regmap_write(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, val); +} + +static int hi3660_pcie_phy_init(struct phy *generic_phy) +{ + struct hi3660_pcie_phy *phy = phy_get_drvdata(generic_phy); + int ret; + + /* Power supply for Host */ + regmap_write(phy->sysctrl, + SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT); + usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX); + + hi3660_pcie_phy_oe_enable(phy); + + ret = clk_set_rate(phy->phy_ref_clk, REF_CLK_FREQ); + if (ret) + return ret; + + return clk_prepare_enable(phy->phy_ref_clk); +} + +static int hi3660_pcie_phy_power_on(struct phy *generic_phy) +{ + struct hi3660_pcie_phy *phy = phy_get_drvdata(generic_phy); + struct device *dev = phy->dev; + u32 reg_val; + int ret; + + ret = clk_prepare_enable(phy->apb_phy_clk); + if (ret) + goto disable_phy_clk; + + ret = clk_prepare_enable(phy->pcie_aclk); + if (ret) + goto disable_apb_phy_clk; + + /* ISO disable, PCIeCtrl, PHY assert and clk gate clear */ + regmap_write(phy->sysctrl, + SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT); + regmap_write(phy->crgctrl, + CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT); + regmap_write(phy->sysctrl, + SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT); + + reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL1); + reg_val &= ~PHY_REF_PAD_BIT; + kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL1); + + reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL0); + reg_val &= ~PHY_PWR_DOWN_BIT; + kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL0); + usleep_range(TIME_PHY_PD_MIN, TIME_PHY_PD_MAX); + + reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL1); + reg_val &= ~PHY_RST_ACK_BIT; + kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL1); + + usleep_range(PIPE_CLK_WAIT_MIN, PIPE_CLK_WAIT_MAX); + reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_STATUS0); + if (reg_val & PIPE_CLK_STABLE) { + dev_err(dev, "PIPE clk is not stable\n"); + ret = -EINVAL; + goto disable_clks; + } + + /* perst assert Endpoint */ + if (!gpio_request(phy->gpio_id_reset, "pcie_perst")) { + usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX); + ret = gpio_direction_output(phy->gpio_id_reset, 1); + if (ret) + goto disable_clks; + usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX); + return 0; + } + +disable_clks: + clk_disable_unprepare(phy->pcie_aclk); +disable_apb_phy_clk: + clk_disable_unprepare(phy->apb_phy_clk); +disable_phy_clk: + clk_disable_unprepare(phy->phy_ref_clk); + return ret; +} + +static int hi3660_pcie_phy_power_off(struct phy *generic_phy) +{ + struct hi3660_pcie_phy *phy = phy_get_drvdata(generic_phy); + + /* Drop power supply for Host */ + regmap_write(phy->sysctrl, SCTRL_PCIE_CMOS_OFFSET, 0x00); + + clk_disable_unprepare(phy->pcie_aclk); + clk_disable_unprepare(phy->apb_phy_clk); + clk_disable_unprepare(phy->phy_ref_clk); + + return 0; +} + +static const struct phy_ops hi3660_phy_ops = { + .init = hi3660_pcie_phy_init, + .power_on = hi3660_pcie_phy_power_on, + .power_off = hi3660_pcie_phy_power_off, + .owner = THIS_MODULE, +}; + +static int hi3660_pcie_phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct device *dev = &pdev->dev; + struct hi3660_pcie_phy *phy; + struct phy *generic_phy; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + phy->dev = dev; + + phy->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref"); + if (IS_ERR(phy->phy_ref_clk)) + return PTR_ERR(phy->phy_ref_clk); + + phy->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy"); + if (IS_ERR(phy->apb_phy_clk)) + return PTR_ERR(phy->apb_phy_clk); + + phy->pcie_aclk = devm_clk_get(dev, "pcie_aclk"); + if (IS_ERR(phy->pcie_aclk)) + return PTR_ERR(phy->pcie_aclk); + + phy->base = devm_platform_ioremap_resource_byname(pdev, "phy"); + if (IS_ERR(phy->base)) + return PTR_ERR(phy->base); + + phy->crgctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl"); + if (IS_ERR(phy->crgctrl)) + return PTR_ERR(phy->crgctrl); + + phy->sysctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl"); + if (IS_ERR(phy->sysctrl)) + return PTR_ERR(phy->sysctrl); + + phy->gpio_id_reset = of_get_named_gpio(dev->of_node, + "reset-gpios", 0); + if (phy->gpio_id_reset == -EPROBE_DEFER) { + return -EPROBE_DEFER; + } else if (!gpio_is_valid(phy->gpio_id_reset)) { + dev_err(dev, "unable to get a valid gpio pin\n"); + return -ENODEV; + } + + generic_phy = devm_phy_create(dev, dev->of_node, &hi3660_phy_ops); + if (IS_ERR(generic_phy)) { + dev_err(dev, "failed to create PHY\n"); + return PTR_ERR(generic_phy); + } + + phy_set_drvdata(generic_phy, phy); + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id hi3660_pcie_phy_match[] = { + { + .compatible = "hisilicon,hi960-pcie-phy", + }, + {}, +}; + +static struct platform_driver hi3660_pcie_phy_driver = { + .probe = hi3660_pcie_phy_probe, + .driver = { + .of_match_table = hi3660_pcie_phy_match, + .name = "hi3660_pcie_phy", + .suppress_bind_attrs = true, + } +}; +builtin_platform_driver(hi3660_pcie_phy_driver); From patchwork Thu Jul 8 15:50:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 12365509 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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 5475DC07E96 for ; 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h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QkAceOckiRR6IJtjS3hcBguwcAMkbGO+QQ46rN95bMUXVvPG3wtECROAM0q1CNJX8 BQ9urF579EYmxkHJj0T5ozj8v51kCtFWUI0BJqwMlttanq4gdoyPZt05JkLrIGCOBQ MvN66bNxthL6I76HwPZJETb0i3gvwXCNDY8yMqi3Ha1Ka6xKGRIu9ud7fxbrbp7QnP JPULNG6V2G65oUc8z2n1B5WuCszlhh8C/K2MGFWtGEK4aBQncMiEocm9LPol2PrDrV 8LKFTOu6KFNVbZ6lkkJIQ8epvrGqRpg6OFkYhnEHzFac6xTmlic0S99dQTGDQXP7KY aUsQy5w1QtxEQ== Received: by mail.kernel.org with local (Exim 4.94.2) (envelope-from ) id 1m1WI4-008VVF-Iy; Thu, 08 Jul 2021 17:50:16 +0200 From: Mauro Carvalho Chehab To: Manivannan Sadhasivam , Rob Herring Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , Kishon Vijay Abraham I , Rob Herring , Vinod Koul , Wei Xu , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org Subject: [PATCH RFC 5/7] bindings: phy: add bindings for Hikey 960 PCIe PHY Date: Thu, 8 Jul 2021 17:50:12 +0200 Message-Id: <28b9aa4d2d182d4705d7837c9165ae7b5bd8d141.1625758732.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210708_085025_721058_81B6B329 X-CRM114-Status: GOOD ( 13.65 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Document the bindings for Hikey 960 (hi3660) PCIe PHY interface, supported via the pcie-kirin driver. Signed-off-by: Mauro Carvalho Chehab --- .../phy/hisilicon,phy-hi3660-pcie.yaml | 70 +++++++++++++++++++ arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 11 +-- 2 files changed, 76 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3660-pcie.yaml diff --git a/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3660-pcie.yaml b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3660-pcie.yaml new file mode 100644 index 000000000000..e91a38450461 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/hisilicon,phy-hi3660-pcie.yaml @@ -0,0 +1,70 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/phy/hisilicon,phy-hi3660-pcie.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Hisilicon Kirin960 PCIe PHY + +maintainers: + - Mauro Carvalho Chehab + +description: |+ + Bindings for PCIe PHY on HiSilicon Kirin 960. + +properties: + compatible: + const: hisilicon,hi960-pcie-phy + + "#phy-cells": + const: 0 + + reg: + maxItems: 1 + description: PHY Control registers + + reg-names: + const: phy + + clocks: + items: + - description: PCIe PHY clock + - description: PCIe APB PHY clock + + clock-names: + items: + - const: pcie_phy_ref + - const: pcie_apb_phy + + reset-gpios: + description: PCI PERST reset GPIO(s) + +required: + - "#phy-cells" + - compatible + - reg + - reg-names + - clocks + - clock-names + - reset-gpios + +additionalProperties: false + +examples: + - | + bus { + #address-cells = <2>; + #size-cells = <2>; + + pcie_phy: pcie-phy@f3f2000 { + compatible = "hisilicon,hi960-pcie-phy"; + reg = <0x0 0xf3f20000 0x0 0x40000>; + reg-names = "phy"; + clocks = <&crg_ctrl HI3660_PCIEPHY_REF>, + <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>; + clock-names = "pcie_phy_ref", "pcie_apb_phy"; + reset-gpios = <&gpio11 1 0 >; + #phy-cells = <0>; + }; + }; +... diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi index 3a589fa4ca81..96c978db12dc 100644 --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi @@ -1006,8 +1006,10 @@ pcie_phy: pcie-phy@f3f2000 { reg = <0x0 0xf3f20000 0x0 0x40000>; reg-names = "phy"; clocks = <&crg_ctrl HI3660_PCIEPHY_REF>, - <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>; - clock-names = "pcie_phy_ref", "pcie_apb_phy"; + <&crg_ctrl HI3660_PCLK_GATE_PCIE_PHY>, + <&crg_ctrl HI3660_ACLK_GATE_PCIE>; + clock-names = "pcie_phy_ref", "pcie_apb_phy", + "pcie_aclk"; reset-gpios = <&gpio11 1 0 >; #phy-cells = <0>; }; @@ -1040,9 +1042,8 @@ &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>, <0x0 0 0 4 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>; clocks = <&crg_ctrl HI3660_CLK_GATE_PCIEAUX>, - <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>, - <&crg_ctrl HI3660_ACLK_GATE_PCIE>; - clock-names = "pcie_aux", "pcie_apb_sys", "pcie_aclk"; + <&crg_ctrl HI3660_PCLK_GATE_PCIE_SYS>; + clock-names = "pcie_aux", "pcie_apb_sys"; }; /* UFS */ From patchwork Thu Jul 8 15:50:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 12365515 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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 64F3EC07E96 for ; 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bh=TDoVj787WBTa2FkcvG3ZQlONSrG8hdAFKRQmmSGo66w=; b=sjp0Y2VB3Domr9 Mot7yWJKsk5c7RtU7X8m740UXatevGHaCeVrA27sUN0JBQnVEINCLnZvEl39w/OFdObsM4y+fKBS+ edENIOnsXTaSUO17ctmsI+LSik150/uQnZ5ByO41+jWwTh6Fq/zYXDGr2Zrb2vFDZ1zrih/X/mqCK zheB75CfK+KtQVztPhi57e2ddM+m8XBcQVEVHoeCrW2AzsnXmD2/e5Pi4gBPhztSo5oxI5vA6HFnu 1yzXcw3nJYw1XE7FAvXVfRJM/vPEnlxyAMxO/ps79mqmKGkL9b3hFJNHMRIm5alFKVy3S4DUrIkEK WlcbmQeZVrM3jAfIO4IA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m1WIx-00HJwS-LV; Thu, 08 Jul 2021 15:51:11 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m1WID-00HJiY-F2 for linux-phy@lists.infradead.org; Thu, 08 Jul 2021 15:50:33 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id B473061923; Thu, 8 Jul 2021 15:50:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625759425; bh=PQ/zeJpIdAqGvDTaRXZhliYYxwsq4I4xJo0exkybWwA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zcq8jaCsdZvyIADTe+7+hzKd6r2rkXxtQITNdndxQAropjuTSo6ogIhBfQa35f8P8 xsC8sej5FeLwBQww2x++zXmFlDMIt52NujWtiYQzfP7c8gQ269h45ggGteToK4JqTz wtgfq63cjHSiKAXYWCnlbrF29uQBxfAAY4yv0rFET7elgJOm71KPkS3MajBunO+g7q SxmnWVBKC2d3s+j137EPl/BbGSPCNnI/xjY7tKPcd9a4RfYUw6HXEyD5rh/nOP4xd3 RDx89pXrOjwGdio4t31MUZU/BqtkI0N6t+W5tDjOUL6OeeUERAek8QpA8mPR7ANOab KWG71GN6HatLQ== Received: by mail.kernel.org with local (Exim 4.94.2) (envelope-from ) id 1m1WI4-008VVI-K5; Thu, 08 Jul 2021 17:50:16 +0200 From: Mauro Carvalho Chehab To: Manivannan Sadhasivam , Rob Herring Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , =?utf-8?q?Krzysztof_Wilc?= =?utf-8?q?zy=C5=84ski?= , Binghui Wang , Bjorn Helgaas , Kishon Vijay Abraham I , Lorenzo Pieralisi , Rob Herring , Vinod Koul , Xiaowei Song , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-phy@lists.infradead.org Subject: [PATCH RFC 6/7] phy: add driver for Kirin 970 PCIe PHY Date: Thu, 8 Jul 2021 17:50:13 +0200 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210708_085025_716634_17C1DABB X-CRM114-Status: GOOD ( 23.54 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org The Kirin 970 PHY is somewhat similar to the Kirin 960, but it does a lot more. Add the needed bits for PCIe to start working on Hikey 970 boards. Signed-off-by: Mauro Carvalho Chehab --- .../devicetree/bindings/pci/kirin-pcie.txt | 1 + drivers/pci/controller/dwc/pcie-kirin.c | 5 + drivers/phy/hisilicon/Kconfig | 10 + drivers/phy/hisilicon/Makefile | 1 + drivers/phy/hisilicon/phy-hi3670-pcie.c | 844 ++++++++++++++++++ 5 files changed, 861 insertions(+) create mode 100644 drivers/phy/hisilicon/phy-hi3670-pcie.c diff --git a/Documentation/devicetree/bindings/pci/kirin-pcie.txt b/Documentation/devicetree/bindings/pci/kirin-pcie.txt index 21fb41a3ee3b..b0c4018e7244 100644 --- a/Documentation/devicetree/bindings/pci/kirin-pcie.txt +++ b/Documentation/devicetree/bindings/pci/kirin-pcie.txt @@ -10,6 +10,7 @@ Additional properties are described here: Required properties - compatible: "hisilicon,kirin960-pcie" + "hisilicon,kirin970-pcie" - reg: Should contain rc_dbi, apb, config registers location and length. - reg-names: Must include the following entries: "dbi": controller configuration registers; diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c index ffa622e68389..ac02d7b6de55 100644 --- a/drivers/pci/controller/dwc/pcie-kirin.c +++ b/drivers/pci/controller/dwc/pcie-kirin.c @@ -98,6 +98,10 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie, if (IS_ERR(kirin_pcie->apb)) return PTR_ERR(kirin_pcie->apb); + dev_info(dev, "pcie-kirin full name: %s\n", + dev->of_node->full_name); + + return 0; } @@ -336,6 +340,7 @@ static int __exit kirin_pcie_remove(struct platform_device *pdev) static const struct of_device_id kirin_pcie_match[] = { { .compatible = "hisilicon,kirin960-pcie" }, + { .compatible = "hisilicon,kirin970-pcie" }, {}, }; diff --git a/drivers/phy/hisilicon/Kconfig b/drivers/phy/hisilicon/Kconfig index c0725907e2cb..e52d54b0c9d6 100644 --- a/drivers/phy/hisilicon/Kconfig +++ b/drivers/phy/hisilicon/Kconfig @@ -43,6 +43,16 @@ config PHY_HI3670_USB To compile this driver as a module, choose M here. +config PHY_HI3670_PCIE + tristate "hi3670 PCIe PHY support" + depends on (ARCH_HISI && ARM64) || COMPILE_TEST + select GENERIC_PHY + select MFD_SYSCON + help + Enable this to support the HISILICON HI3670 PCIe PHY. + + To compile this driver as a module, choose M here. + config PHY_HISTB_COMBPHY tristate "HiSilicon STB SoCs COMBPHY support" depends on (ARCH_HISI && ARM64) || COMPILE_TEST diff --git a/drivers/phy/hisilicon/Makefile b/drivers/phy/hisilicon/Makefile index 3c3d70dd7469..2670f2f382e1 100644 --- a/drivers/phy/hisilicon/Makefile +++ b/drivers/phy/hisilicon/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_PHY_HI6220_USB) += phy-hi6220-usb.o obj-$(CONFIG_PHY_HI3660_USB) += phy-hi3660-usb3.o obj-$(CONFIG_PHY_HI3660_PCIE) += phy-hi3660-pcie.o obj-$(CONFIG_PHY_HI3670_USB) += phy-hi3670-usb3.o +obj-$(CONFIG_PHY_HI3670_PCIE) += phy-hi3670-pcie.o obj-$(CONFIG_PHY_HISTB_COMBPHY) += phy-histb-combphy.o obj-$(CONFIG_PHY_HISI_INNO_USB2) += phy-hisi-inno-usb2.o obj-$(CONFIG_PHY_HIX5HD2_SATA) += phy-hix5hd2-sata.o diff --git a/drivers/phy/hisilicon/phy-hi3670-pcie.c b/drivers/phy/hisilicon/phy-hi3670-pcie.c new file mode 100644 index 000000000000..81b8b3e1b6b6 --- /dev/null +++ b/drivers/phy/hisilicon/phy-hi3670-pcie.c @@ -0,0 +1,844 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCIe phy driver for Kirin 970 + * + * Copyright (C) 2017 HiSilicon Electronics Co., Ltd. + * https://www.huawei.com + * Copyright (C) 2021 Huawei Technologies Co., Ltd. + * https://www.huawei.com + * + * Authors: + * Mauro Carvalho Chehab + * Manivannan Sadhasivam + * + * Based on: + * https://lore.kernel.org/lkml/4c9d6581478aa966698758c0420933f5defab4dd.1612335031.git.mchehab+huawei@kernel.org/ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define AXI_CLK_FREQ 207500000 +#define REF_CLK_FREQ 100000000 + +/* PCIe CTRL registers */ +#define SOC_PCIECTRL_CTRL0_ADDR 0x000 +#define SOC_PCIECTRL_CTRL1_ADDR 0x004 +#define SOC_PCIECTRL_CTRL7_ADDR 0x01c +#define SOC_PCIECTRL_CTRL12_ADDR 0x030 +#define SOC_PCIECTRL_CTRL20_ADDR 0x050 +#define SOC_PCIECTRL_CTRL21_ADDR 0x054 +#define SOC_PCIECTRL_STATE0_ADDR 0x400 + +/* PCIe PHY registers */ +#define SOC_PCIEPHY_CTRL0_ADDR 0x000 +#define SOC_PCIEPHY_CTRL1_ADDR 0x004 +#define SOC_PCIEPHY_CTRL2_ADDR 0x008 +#define SOC_PCIEPHY_CTRL3_ADDR 0x00c +#define SOC_PCIEPHY_CTRL38_ADDR 0x0098 +#define SOC_PCIEPHY_STATE0_ADDR 0x400 + +#define PCIE_LINKUP_ENABLE (0x8020) +#define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21) +#define PCIE_LTSSM_ENABLE_BIT (0x1 << 11) +#define PCIEPHY_RESET_BIT (0x1 << 17) +#define PCIEPHY_PIPE_LINE0_RESET_BIT (0x1 << 19) + +#define PORT_MSI_CTRL_ADDR 0x820 +#define PORT_MSI_CTRL_UPPER_ADDR 0x824 +#define PORT_MSI_CTRL_INT0_ENABLE 0x828 + +#define EYEPARAM_NOCFG 0xFFFFFFFF +#define RAWLANEN_DIG_PCS_XF_TX_OVRD_IN_1 0x3001 +#define SUP_DIG_LVL_OVRD_IN 0xf +#define LANEN_DIG_ASIC_TX_OVRD_IN_1 0x1002 +#define LANEN_DIG_ASIC_TX_OVRD_IN_2 0x1003 + +/* hi3670 pciephy register */ +#define SOC_PCIEPHY_MMC1PLL_CTRL1 0xc04 +#define SOC_PCIEPHY_MMC1PLL_CTRL16 0xC40 +#define SOC_PCIEPHY_MMC1PLL_CTRL17 0xC44 +#define SOC_PCIEPHY_MMC1PLL_CTRL20 0xC50 +#define SOC_PCIEPHY_MMC1PLL_CTRL21 0xC54 +#define SOC_PCIEPHY_MMC1PLL_STAT0 0xE00 + +#define CRGPERIPH_PEREN12 0x470 +#define CRGPERIPH_PERDIS12 0x474 +#define CRGPERIPH_PCIECTRL0 0x800 + +/* define ie,oe cfg */ +#define IO_IE_EN_HARD_BYPASS (0x1 << 27) +#define IO_OE_EN_HARD_BYPASS (0x1 << 11) +#define IO_HARD_CTRL_DEBOUNCE_BYPASS (0x1 << 10) +#define IO_OE_GT_MODE (0x2 << 7) +#define DEBOUNCE_WAITCFG_IN (0xf << 20) +#define DEBOUNCE_WAITCFG_OUT (0xf << 13) + +/* noc power domain */ +#define NOC_POWER_IDLEREQ_1 0x38c +#define NOC_POWER_IDLE_1 0x394 +#define NOC_PW_MASK 0x10000 +#define NOC_PW_SET_BIT 0x1 + +/* Number of GPIOs required by PHY */ +#define MAX_GPIO_RESETS 4 +#define MAX_GPIO_CLKREQ 3 +#define NUM_EYEPARAM 5 + +/* info located in sysctrl */ +#define SCTRL_PCIE_CMOS_OFFSET 0x60 +#define SCTRL_PCIE_CMOS_BIT 0x10 +#define SCTRL_PCIE_ISO_OFFSET 0x44 +#define SCTRL_PCIE_ISO_BIT 0x30 +#define SCTRL_PCIE_HPCLK_OFFSET 0x190 +#define SCTRL_PCIE_HPCLK_BIT 0x184000 +#define SCTRL_PCIE_OE_OFFSET 0x14a +#define PCIE_DEBOUNCE_PARAM 0xF0F400 +#define PCIE_OE_BYPASS (0x3 << 28) + +/* peri_crg ctrl */ +#define CRGCTRL_PCIE_ASSERT_OFFSET 0x88 +#define CRGCTRL_PCIE_ASSERT_BIT 0x8c000000 + +/* Time for delay */ +#define REF_2_PERST_MIN 20000 +#define REF_2_PERST_MAX 25000 +#define PERST_2_ACCESS_MIN 10000 +#define PERST_2_ACCESS_MAX 12000 +#define PIPE_CLK_WAIT_MIN 550 +#define PIPE_CLK_WAIT_MAX 600 +#define TIME_CMOS_MIN 100 +#define TIME_CMOS_MAX 105 +#define TIME_PHY_PD_MIN 10 +#define TIME_PHY_PD_MAX 11 + +struct hi3670_pcie_phy { + struct device *dev; + void __iomem *base; + struct regmap *apb; + struct regmap *crgctrl; + struct regmap *sysctrl; + struct regmap *pmctrl; + struct clk *phy_ref_clk; + struct clk *apb_phy_clk; + struct clk *pcie_aclk; + int n_gpio_resets; + int n_gpio_clkreq; + int gpio_id_reset[MAX_GPIO_RESETS]; + const char *reset_names[MAX_GPIO_RESETS]; + int gpio_id_clkreq[MAX_GPIO_CLKREQ]; + const char *clkreq_names[MAX_GPIO_CLKREQ]; + u32 eye_param[NUM_EYEPARAM]; +}; + + +/* Registers in PCIePHY */ +static inline void hi3670_apb_phy_writel(struct hi3670_pcie_phy *phy, + u32 val, u32 reg) +{ + writel(val, phy->base + 0x40000 + reg); +} + +static inline u32 hi3670_apb_phy_readl(struct hi3670_pcie_phy *phy, u32 reg) +{ + return readl(phy->base + 0x40000 + reg); +} + +static inline void kirin_apb_natural_phy_writel(struct hi3670_pcie_phy *phy, + u32 val, u32 reg) +{ + writel(val, phy->base + reg * 4); +} + +static inline u32 kirin_apb_natural_phy_readl(struct hi3670_pcie_phy *phy, + u32 reg) +{ + return readl(phy->base + reg * 4); +} + +static void hi3670_pcie_phy_oe_enable(struct hi3670_pcie_phy *phy) +{ + u32 val; + + regmap_read(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, &val); + val |= PCIE_DEBOUNCE_PARAM; + val &= ~PCIE_OE_BYPASS; + regmap_write(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, val); +} + +void hi3670_pcie_get_eyeparam(struct hi3670_pcie_phy *phy) +{ + struct device *dev = phy->dev; + struct device_node *np; + int ret, i; + + np = dev->of_node; + + ret = of_property_read_u32_array(np, "eye_param", phy->eye_param, NUM_EYEPARAM); + if (!ret) + return; + + /* There's no optional eye_param property. Set array to default */ + for (i = 0; i < NUM_EYEPARAM; i++) + phy->eye_param[i] = EYEPARAM_NOCFG; +} + +static void hi3670_pcie_set_eyeparam(struct hi3670_pcie_phy *phy) +{ + u32 val; + + val = kirin_apb_natural_phy_readl(phy, RAWLANEN_DIG_PCS_XF_TX_OVRD_IN_1); + + if (phy->eye_param[1] != EYEPARAM_NOCFG) { + val &= (~0xf00); + val |= (phy->eye_param[1] << 8) | (0x1 << 12); + } + kirin_apb_natural_phy_writel(phy, val, RAWLANEN_DIG_PCS_XF_TX_OVRD_IN_1); + + val = kirin_apb_natural_phy_readl(phy, LANEN_DIG_ASIC_TX_OVRD_IN_2); + val &= (~0x1FBF); + if (phy->eye_param[2] != EYEPARAM_NOCFG) + val |= (phy->eye_param[2]<< 0) | (0x1 << 6); + + if (phy->eye_param[3] != EYEPARAM_NOCFG) + val |= (phy->eye_param[3] << 7) | (0x1 << 13); + + kirin_apb_natural_phy_writel(phy, val, LANEN_DIG_ASIC_TX_OVRD_IN_2); + + val = kirin_apb_natural_phy_readl(phy, SUP_DIG_LVL_OVRD_IN); + if (phy->eye_param[0] != EYEPARAM_NOCFG) { + val &= (~0x1C0); + val |= (phy->eye_param[0] << 6) | (0x1 << 9); + } + kirin_apb_natural_phy_writel(phy, val, SUP_DIG_LVL_OVRD_IN); + + val = kirin_apb_natural_phy_readl(phy, LANEN_DIG_ASIC_TX_OVRD_IN_1); + if (phy->eye_param[4] != EYEPARAM_NOCFG) { + val &= (~0x7E00); + val |= (phy->eye_param[4] << 9) | (0x1 << 15); + } + kirin_apb_natural_phy_writel(phy, val, LANEN_DIG_ASIC_TX_OVRD_IN_1); +} + +static int hi3670_pcie_gpio_request(struct hi3670_pcie_phy *phy, + struct device *dev) +{ + int ret, i; + + for (i = 0; i < phy->n_gpio_resets; i++) { + if (!gpio_is_valid(phy->gpio_id_reset[i])) { + dev_err(dev, "unable to get a valid %s gpio\n", + phy->reset_names[i]); + return -ENODEV; + } + + ret = devm_gpio_request(dev, phy->gpio_id_reset[i], + phy->reset_names[i]); + if (ret) + return ret; + } + + for (i = 0; i < phy->n_gpio_clkreq; i++) { + if (!gpio_is_valid(phy->gpio_id_clkreq[i])) { + dev_err(dev, "unable to get a valid %s gpio\n", + phy->clkreq_names[i]); + return -ENODEV; + } + + ret = devm_gpio_request(dev, phy->gpio_id_clkreq[i], + phy->clkreq_names[i]); + if (ret) + return ret; + } + + return ret; +} + +static long hi3670_pcie_phy_get_resources(struct hi3670_pcie_phy *phy, + struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + char name[32]; + int i; + + phy->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref"); + if (IS_ERR(phy->phy_ref_clk)) + return PTR_ERR(phy->phy_ref_clk); + + phy->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy"); + if (IS_ERR(phy->apb_phy_clk)) + return PTR_ERR(phy->apb_phy_clk); + + phy->pcie_aclk = devm_clk_get(dev, "pcie_aclk"); + if (IS_ERR(phy->pcie_aclk)) + return PTR_ERR(phy->pcie_aclk); + + phy->base = devm_platform_ioremap_resource_byname(pdev, "phy"); + if (IS_ERR(phy->base)) + return PTR_ERR(phy->base); + + phy->n_gpio_resets = of_gpio_named_count(np, "reset-gpios"); + if (phy->n_gpio_resets > MAX_GPIO_RESETS) { + dev_err(dev, "Too many GPIO resets!\n"); + return -EINVAL; + } + for (i = 0; i < phy->n_gpio_resets; i++) { + phy->gpio_id_reset[i] = of_get_named_gpio(dev->of_node, + "reset-gpios", i); + if (phy->gpio_id_reset[i] < 0) + return phy->gpio_id_reset[i]; + + sprintf(name, "pcie_perst_%d", i); + + phy->reset_names[i] = devm_kstrdup_const(dev, name, + GFP_KERNEL); + if (!phy->reset_names[i]) + return -ENOMEM; + } + + phy->n_gpio_clkreq = of_gpio_named_count(np, "clkreq-gpios"); + if (phy->n_gpio_clkreq > MAX_GPIO_CLKREQ) { + dev_err(dev, "Too many GPIO clock requests!\n"); + return -EINVAL; + } + for (i = 0; i < phy->n_gpio_clkreq; i++) { + phy->gpio_id_clkreq[i] = of_get_named_gpio(dev->of_node, + "clkreq-gpios", i); + if (phy->gpio_id_clkreq[i] < 0) + return phy->gpio_id_clkreq[i]; + + sprintf(name, "pcie_clkreq_%d", i); + phy->clkreq_names[i] = devm_kstrdup_const(dev, name, + GFP_KERNEL); + if (!phy->clkreq_names[i]) + return -ENOMEM; + } + + hi3670_pcie_get_eyeparam(phy); + + phy->crgctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-crgctrl"); + if (IS_ERR(phy->crgctrl)) + return PTR_ERR(phy->crgctrl); + + phy->sysctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-sctrl"); + if (IS_ERR(phy->sysctrl)) + return PTR_ERR(phy->sysctrl); + + phy->pmctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3670-pmctrl"); + if (IS_ERR(phy->sysctrl)) + return PTR_ERR(phy->sysctrl); + + return 0; +} + +static void hi3670_pcie_natural_cfg(struct hi3670_pcie_phy *phy) +{ + u32 val; + + /* change 2p mem_ctrl */ + regmap_write(phy->apb, SOC_PCIECTRL_CTRL20_ADDR, 0x02605550); + + /* pull up sys_aux_pwr_det */ + regmap_read(phy->apb, SOC_PCIECTRL_CTRL7_ADDR, &val); + val |= (0x1 << 10); + regmap_write(phy->apb, SOC_PCIECTRL_CTRL7_ADDR, val); + + /* output, pull down */ + regmap_read(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, &val); + val &= ~(0x3 << 2); + val |= (0x1 << 1); + val &= ~(0x1 << 0); + regmap_write(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, val); + + /* Handle phy_reset and lane0_reset to HW */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL1_ADDR); + val |= PCIEPHY_RESET_BIT; + val &= ~PCIEPHY_PIPE_LINE0_RESET_BIT; + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL1_ADDR); + + /* fix chip bug: TxDetectRx fail */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL38_ADDR); + val |= (0x1 << 2); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL38_ADDR); +} + +static void hi3670_pcie_pll_init(struct hi3670_pcie_phy *phy) +{ + u32 val; + + /* choose FNPLL */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL1); + val |= (0x1 << 27); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL1); + + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL16); + val &= 0xF000FFFF; + /* fnpll fbdiv = 0xD0 */ + val |= (0xd0 << 16); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL16); + + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL17); + val &= 0xFF000000; + /* fnpll fracdiv = 0x555555 */ + val |= (0x555555 << 0); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL17); + + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL20); + val &= 0xF5FF88FF; + /* fnpll dll_en = 0x1 */ + val |= (0x1 << 27); + /* fnpll postdiv1 = 0x5 */ + val |= (0x5 << 8); + /* fnpll postdiv2 = 0x4 */ + val |= (0x4 << 12); + /* fnpll pll_mode = 0x0 */ + val &= ~(0x1 << 25); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL20); + + hi3670_apb_phy_writel(phy, 0x20, SOC_PCIEPHY_MMC1PLL_CTRL21); +} + +static int hi3670_pcie_pll_ctrl(struct hi3670_pcie_phy *phy, bool enable) +{ + struct device *dev = phy->dev; + u32 val; + int time = 200; + + if (enable) { + /* pd = 0 */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL16); + val &= ~(0x1 << 0); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL16); + + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_STAT0); + + /* choose FNPLL */ + while (!(val & 0x10)) { + if (!time) { + dev_err(dev, "wait for pll_lock timeout\n"); + return -1; + } + time --; + udelay(1); + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_STAT0); + } + + /* pciepll_bp = 0 */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL20); + val &= ~(0x1 << 16); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL20); + + } else { + /* pd = 1 */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL16); + val |= (0x1 << 0); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL16); + + /* pciepll_bp = 1 */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_MMC1PLL_CTRL20); + val |= (0x1 << 16); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_MMC1PLL_CTRL20); + } + + return 0; +} + +static void hi3670_pcie_hp_debounce_gt(struct hi3670_pcie_phy *phy, bool open) +{ + if (open) + /* gt_clk_pcie_hp/gt_clk_pcie_debounce open */ + regmap_write(phy->crgctrl, CRGPERIPH_PEREN12, 0x9000); + else + /* gt_clk_pcie_hp/gt_clk_pcie_debounce close */ + regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x9000); +} + +static void hi3670_pcie_phyref_gt(struct hi3670_pcie_phy *phy, bool open) +{ + unsigned int val; + + regmap_read(phy->crgctrl, CRGPERIPH_PCIECTRL0, &val); + + if (open) + val &= ~(0x1 << 1); //enable hard gt mode + else + val |= (0x1 << 1); //disable hard gt mode + + regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val); + + /* disable soft gt mode */ + regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x4000); +} + +static void hi3670_pcie_oe_ctrl(struct hi3670_pcie_phy *phy, bool en_flag) +{ + unsigned int val; + + regmap_read(phy->crgctrl , CRGPERIPH_PCIECTRL0, &val); + + /* set ie cfg */ + val |= IO_IE_EN_HARD_BYPASS; + + /* set oe cfg */ + val &= ~IO_HARD_CTRL_DEBOUNCE_BYPASS; + + /* set phy_debounce in&out time */ + val |= (DEBOUNCE_WAITCFG_IN | DEBOUNCE_WAITCFG_OUT); + + /* select oe_gt_mode */ + val |= IO_OE_GT_MODE; + + if (en_flag) + val &= ~IO_OE_EN_HARD_BYPASS; + else + val |= IO_OE_EN_HARD_BYPASS; + + regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val); +} + +static void hi3670_pcie_ioref_gt(struct hi3670_pcie_phy *phy, bool open) +{ + unsigned int val; + + if (open) { + regmap_write(phy->apb, SOC_PCIECTRL_CTRL21_ADDR, 0x20000070); + + hi3670_pcie_oe_ctrl(phy, true); + + /* en hard gt mode */ + regmap_read(phy->crgctrl, CRGPERIPH_PCIECTRL0, &val); + val &= ~(0x1 << 0); + regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val); + + /* disable soft gt mode */ + regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x2000); + + } else { + /* disable hard gt mode */ + regmap_read(phy->crgctrl, CRGPERIPH_PCIECTRL0, &val); + val |= (0x1 << 0); + regmap_write(phy->crgctrl, CRGPERIPH_PCIECTRL0, val); + + /* disable soft gt mode */ + regmap_write(phy->crgctrl, CRGPERIPH_PERDIS12, 0x2000); + + hi3670_pcie_oe_ctrl(phy, false); + } +} + +static int hi3670_pcie_allclk_ctrl(struct hi3670_pcie_phy *phy, bool clk_on) +{ + struct device *dev = phy->dev; + u32 val; + int ret = 0; + + if (!clk_on) + goto close_clocks; + + /* choose 100MHz clk src: Bit[8]==1 pad, Bit[8]==0 pll */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL1_ADDR); + val &= ~(0x1 << 8); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL1_ADDR); + + hi3670_pcie_pll_init(phy); + + ret = hi3670_pcie_pll_ctrl(phy, true); + if (ret) { + dev_err(dev, "Failed to enable pll\n"); + return -1; + } + hi3670_pcie_hp_debounce_gt(phy, true); + hi3670_pcie_phyref_gt(phy, true); + hi3670_pcie_ioref_gt(phy, true); + + ret = clk_set_rate(phy->pcie_aclk, AXI_CLK_FREQ); + if (ret) { + dev_err(dev, "Failed to set rate\n"); + goto close_clocks; + } + + return 0; + +close_clocks: + hi3670_pcie_ioref_gt(phy, false); + hi3670_pcie_phyref_gt(phy, false); + hi3670_pcie_hp_debounce_gt(phy, false); + + hi3670_pcie_pll_ctrl(phy, false); + + return ret; +} + +static bool is_pipe_clk_stable(struct hi3670_pcie_phy *phy) +{ + struct device *dev = phy->dev; + u32 val; + u32 time = 100; + u32 pipe_clk_stable = 0x1 << 19; + + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_STATE0_ADDR); + while (val & pipe_clk_stable) { + mdelay(1); + if (time == 0) { + dev_err(dev, "PIPE clk is not stable\n"); + return false; + } + time--; + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_STATE0_ADDR); + } + + return true; +} + +static int hi3670_pcie_noc_power(struct hi3670_pcie_phy *phy, bool enable) +{ + struct device *dev = phy->dev; + u32 time = 100; + unsigned int val = NOC_PW_MASK; + int rst; + + if (enable) + val = NOC_PW_MASK | NOC_PW_SET_BIT; + else + val = NOC_PW_MASK; + rst = enable ? 1 : 0; + + regmap_write(phy->pmctrl, NOC_POWER_IDLEREQ_1, val); + + time = 100; + regmap_read(phy->pmctrl, NOC_POWER_IDLE_1, &val); + while((val & NOC_PW_SET_BIT) != rst) { + udelay(10); + if (!time) { + dev_err(dev, "Failed to reverse noc power-status\n"); + return -1; + } + time--; + regmap_read(phy->pmctrl, NOC_POWER_IDLE_1, &val); + } + + return 0; +} + +static int hi3670_pcie_get_apb(struct hi3670_pcie_phy *phy) +{ + struct device_node *pcie_port; + struct device *dev = phy->dev; + struct device *pcie_dev; + + /* + * The code under hi3670_pcie_get_apb() need to access the + * DWC APB registers. So, get them from + * the pcie driver's regmap (see pcie-kirin regmap). + * + * Such kind of resource can only be obtained during the PCIe + * power_on sequence, as the code inside pcie-kirin needs to + * be already probed, as it needs to register the APB regmap. + */ + pcie_port = of_get_child_by_name(dev->parent->of_node, "pcie"); + if (!pcie_port) { + dev_err(dev, "no pcie node found in %s\n", + dev->parent->of_node->full_name); + return -ENODEV; + } + + pcie_dev = bus_find_device_by_of_node(&platform_bus_type, pcie_port); + if (!pcie_dev) { + dev_err(dev, "Didn't find pcie device\n"); + return -ENODEV; + } + + /* + * We might just use NULL instead of the APB name, as the + * pcie-kirin currently registers directly just one regmap (although + * the DWC driver register other regmaps). + * + * Yet, it sounds safer to warrant that it will be accessing the + * right regmap. So, let's use the named version. + */ + phy->apb = dev_get_regmap(pcie_dev, "kirin_pcie_apb"); + if (!phy->apb) { + dev_err(dev, "Failed to get APB regmap\n"); + return -ENODEV; + } + + return 0; +} + +static int hi3670_pcie_phy_init(struct phy *generic_phy) +{ + struct hi3670_pcie_phy *phy = phy_get_drvdata(generic_phy); + struct device *dev = phy->dev; + int ret, i; + + ret = hi3670_pcie_get_apb(phy); + if (ret) + return ret; + + /* Power supply for Host */ + regmap_write(phy->sysctrl, + SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT); + usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX); + + hi3670_pcie_phy_oe_enable(phy); + + ret = hi3670_pcie_gpio_request(phy, dev); + if (ret) + return ret; + + for (i = 0; i < phy->n_gpio_clkreq; i++) { + ret = gpio_direction_output(phy->gpio_id_clkreq[i], 0); + if (ret) + return ret; + } + + ret = clk_set_rate(phy->phy_ref_clk, REF_CLK_FREQ); + if (ret) + return ret; + + return clk_prepare_enable(phy->phy_ref_clk); +} + +static int hi3670_pcie_phy_power_on(struct phy *generic_phy) +{ + struct hi3670_pcie_phy *phy = phy_get_drvdata(generic_phy); + int val, ret, i; + + ret = clk_prepare_enable(phy->apb_phy_clk); + if (ret) + goto disable_phy_clk; + + ret = clk_prepare_enable(phy->pcie_aclk); + if (ret) + goto disable_apb_phy_clk; + + /* ISO disable, PCIeCtrl, PHY assert and clk gate clear */ + regmap_write(phy->sysctrl, + SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT); + regmap_write(phy->crgctrl, + CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT); + regmap_write(phy->sysctrl, + SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT); + + hi3670_pcie_natural_cfg(phy); + + ret = hi3670_pcie_allclk_ctrl(phy, true); + if (ret) + goto disable_clks; + + /* pull down phy_test_powerdown signal */ + val = hi3670_apb_phy_readl(phy, SOC_PCIEPHY_CTRL0_ADDR); + val &= ~(0x1 << 22); + hi3670_apb_phy_writel(phy, val, SOC_PCIEPHY_CTRL0_ADDR); + + /* deassert controller perst_n */ + regmap_read(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, &val); + val |= (0x1 << 2); + regmap_write(phy->apb, SOC_PCIECTRL_CTRL12_ADDR, val); + udelay(10); + + /* perst assert Endpoints */ + usleep_range(21000, 23000); + for (i = 0; i < phy->n_gpio_resets; i++) { + ret = gpio_direction_output(phy->gpio_id_reset[i], 1); + if (ret) + return ret; + } + usleep_range(10000, 11000); + + ret = is_pipe_clk_stable(phy); + if (!ret) + goto disable_clks; + + hi3670_pcie_set_eyeparam(phy); + + ret = hi3670_pcie_noc_power(phy, false); + if (ret) + goto disable_clks; + + return 0; + +disable_clks: + clk_disable_unprepare(phy->pcie_aclk); +disable_apb_phy_clk: + clk_disable_unprepare(phy->apb_phy_clk); +disable_phy_clk: + clk_disable_unprepare(phy->phy_ref_clk); + return ret; +} + +static int hi3670_pcie_phy_power_off(struct phy *generic_phy) +{ + struct hi3670_pcie_phy *phy = phy_get_drvdata(generic_phy); + + /* Drop power supply for Host */ + regmap_write(phy->sysctrl, SCTRL_PCIE_CMOS_OFFSET, 0x00); + + clk_disable_unprepare(phy->pcie_aclk); + clk_disable_unprepare(phy->apb_phy_clk); + clk_disable_unprepare(phy->phy_ref_clk); + + return 0; +} + +static const struct phy_ops hi3670_phy_ops = { + .init = hi3670_pcie_phy_init, + .power_on = hi3670_pcie_phy_power_on, + .power_off = hi3670_pcie_phy_power_off, + .owner = THIS_MODULE, +}; + +static int hi3670_pcie_phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct device *dev = &pdev->dev; + struct hi3670_pcie_phy *phy; + struct phy *generic_phy; + int ret; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + phy->dev = dev; + + ret = hi3670_pcie_phy_get_resources(phy, pdev); + if (ret) + return ret; + + generic_phy = devm_phy_create(dev, dev->of_node, &hi3670_phy_ops); + if (IS_ERR(generic_phy)) { + dev_err(dev, "failed to create PHY\n"); + return PTR_ERR(generic_phy); + } + + phy_set_drvdata(generic_phy, phy); + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id hi3670_pcie_phy_match[] = { + { + .compatible = "hisilicon,hi970-pcie-phy", + }, + {}, +}; + +static struct platform_driver hi3670_pcie_phy_driver = { + .probe = hi3670_pcie_phy_probe, + .driver = { + .of_match_table = hi3670_pcie_phy_match, + .name = "hi3670_pcie_phy", + .suppress_bind_attrs = true, + } +}; +builtin_platform_driver(hi3670_pcie_phy_driver);