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bh=n2wi0VyDHml3t8zyGPZu/XZ547LV3Cu4QkPHY8CA61U=; b=FgVJ8OK5d5qd3jRNM8IX+w7SnaGGlHDAbqvNayy+CLwHmeKiZPOn1uOm MZIVnvBLMhvCajaNxPL6AYaH4j0JwwHZw8yMuqCtKHDO8GkH/6qzjk/nG oWm12KptzewH6lBwRP+z193vofH1OZ17l6gN+Bdm14zGzReBMvv5BWZZf ByYcKpCkKIL40DoP4tUSqFj9TFw+lHkFasLwPy7OJ/qBEA4ElzWJIMDmf 4HkCVdN+uaqdtD+rWnwEQJunniCzr60dthKFTXOpDIfsH2cAcboUjS/UC pFC2PIVH+xLt7BmT+VQaeD300+hPayVpvpM7BUSYNwqILjfsVhC0F8VUO w==; X-IronPort-AV: E=Sophos;i="5.88,297,1635199200"; d="scan'208";a="21564688" Received: from vtuxmail01.tq-net.de ([10.115.0.20]) by mx1.tq-group.com with ESMTP; 18 Jan 2022 14:16:37 +0100 Received: from steina-w.tq-net.de (unknown [10.123.49.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by vtuxmail01.tq-net.de (Postfix) with ESMTPSA id C33BA280075; Tue, 18 Jan 2022 14:16:36 +0100 (CET) From: Alexander Stein To: Greg Kroah-Hartman , Rob Herring , Shawn Guo , Sascha Hauer , Fabio Estevam Cc: Alexander Stein , NXP Linux Team , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Li Jun Subject: [PATCH v3 3/4] usb: dwc3: imx8mp: Add support for setting SOC specific flags Date: Tue, 18 Jan 2022 14:16:25 +0100 Message-Id: <20220118131626.926394-4-alexander.stein@ew.tq-group.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220118131626.926394-1-alexander.stein@ew.tq-group.com> References: <20220118131626.926394-1-alexander.stein@ew.tq-group.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220118_051648_846423_D27ADF50 X-CRM114-Status: GOOD ( 22.13 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The i.MX8MP glue layer has support for the following flags: * over-current polarity * PWR pad polarity * controlling PPC flag in HCCPARAMS register * permanent port attach for usb2 & usb3 port Allow setting these flags by supporting specific flags in the glue node. In order to get this to work an additional IORESOURCE_MEM and clock is necessary. For backward compatibility this is purely optional. Signed-off-by: Alexander Stein --- drivers/usb/dwc3/dwc3-imx8mp.c | 81 ++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c index 1c8fe657b3a9..3df4313b3740 100644 --- a/drivers/usb/dwc3/dwc3-imx8mp.c +++ b/drivers/usb/dwc3/dwc3-imx8mp.c @@ -36,17 +36,66 @@ #define USB_WAKEUP_EN_MASK GENMASK(5, 0) +/* USB glue registers */ +#define USB_CTRL0 0x00 +#define USB_CTRL1 0x04 + +#define USB_CTRL0_PORTPWR_EN BIT(12) /* 1 - PPC enabled (default) */ +#define USB_CTRL0_USB3_FIXED BIT(22) /* 1 - USB3 permanent attached */ +#define USB_CTRL0_USB2_FIXED BIT(23) /* 1 - USB2 permanent attached */ + +#define USB_CTRL1_OC_POLARITY BIT(16) /* 0 - HIGH / 1 - LOW */ +#define USB_CTRL1_PWR_POLARITY BIT(17) /* 0 - HIGH / 1 - LOW */ + struct dwc3_imx8mp { struct device *dev; struct platform_device *dwc3; void __iomem *hsio_blk_base; + void __iomem *glue_base; struct clk *hsio_clk; struct clk *suspend_clk; + struct clk *phy_clk; int irq; bool pm_suspended; bool wakeup_pending; }; +static void imx8mp_configure_glue(struct dwc3_imx8mp *dwc3_imx) +{ + struct device *dev = dwc3_imx->dev; + u32 value; + + if ((!dwc3_imx->glue_base) || (!dwc3_imx->phy_clk)) + return; + + value = readl(dwc3_imx->glue_base + USB_CTRL0); + + if (device_property_read_bool(dev, "fsl,permanently-attached")) + value |= (USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED); + else + value &= ~(USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED); + + if (device_property_read_bool(dev, "fsl,disable-port-power-control")) + value &= ~(USB_CTRL0_PORTPWR_EN); + else + value |= USB_CTRL0_PORTPWR_EN; + + writel(value, dwc3_imx->glue_base + USB_CTRL0); + + value = readl(dwc3_imx->glue_base + USB_CTRL1); + if (device_property_read_bool(dev, "fsl,over-current-active-low")) + value |= USB_CTRL1_OC_POLARITY; + else + value &= ~USB_CTRL1_OC_POLARITY; + + if (device_property_read_bool(dev, "fsl,power-active-low")) + value |= USB_CTRL1_PWR_POLARITY; + else + value &= ~USB_CTRL1_PWR_POLARITY; + + writel(value, dwc3_imx->glue_base + USB_CTRL1); +} + static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx) { struct dwc3 *dwc3 = platform_get_drvdata(dwc3_imx->dwc3); @@ -100,6 +149,7 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *dwc3_np, *node = dev->of_node; struct dwc3_imx8mp *dwc3_imx; + struct resource *res; int err, irq; if (!node) { @@ -119,6 +169,15 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) if (IS_ERR(dwc3_imx->hsio_blk_base)) return PTR_ERR(dwc3_imx->hsio_blk_base); + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) { + dev_warn(dev, "Base address for glue layer missing. Continuing without, some features are missing though."); + } else { + dwc3_imx->glue_base = devm_ioremap_resource(dev, res); + if (IS_ERR(dwc3_imx->glue_base)) + return PTR_ERR(dwc3_imx->glue_base); + } + dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio"); if (IS_ERR(dwc3_imx->hsio_clk)) { err = PTR_ERR(dwc3_imx->hsio_clk); @@ -145,6 +204,24 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) goto disable_hsio_clk; } + dwc3_imx->phy_clk = devm_clk_get(dev, "phy"); + if (PTR_ERR(dwc3_imx->phy_clk) == -ENOENT) { + dev_warn(dev, "PHY clock missing. Continuing without, some features are missing though."); + dwc3_imx->phy_clk = NULL; + } else if (IS_ERR(dwc3_imx->phy_clk)) { + err = PTR_ERR(dwc3_imx->phy_clk); + dev_err(dev, "Failed to get phy clk, err=%d\n", err); + goto disable_suspend_clk; + } + + if (dwc3_imx->phy_clk) { + err = clk_prepare_enable(dwc3_imx->phy_clk); + if (err) { + dev_err(dev, "Failed to enable phy clk, err=%d\n", err); + goto disable_suspend_clk; + } + } + irq = platform_get_irq(pdev, 0); if (irq < 0) { err = irq; @@ -152,6 +229,8 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) } dwc3_imx->irq = irq; + imx8mp_configure_glue(dwc3_imx); + pm_runtime_set_active(dev); pm_runtime_enable(dev); err = pm_runtime_get_sync(dev); @@ -199,6 +278,8 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) pm_runtime_disable(dev); pm_runtime_put_noidle(dev); disable_clks: + clk_disable_unprepare(dwc3_imx->phy_clk); +disable_suspend_clk: clk_disable_unprepare(dwc3_imx->suspend_clk); disable_hsio_clk: clk_disable_unprepare(dwc3_imx->hsio_clk);