From patchwork Sat Mar 3 21:43:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Blumenstingl X-Patchwork-Id: 10256239 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8BB75602B5 for ; Sat, 3 Mar 2018 21:46:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7D216287A1 for ; Sat, 3 Mar 2018 21:46:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7081B287A6; Sat, 3 Mar 2018 21:46:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, DKIM_VALID, FREEMAIL_FROM autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D4F6D287A1 for ; Sat, 3 Mar 2018 21:46:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=saE/pBxrjEgO79ad9UjwDnYhHCQqwFKAc0iNlrYAzcc=; b=Eez74MSwCH2XV4+uxJzYddD6VQ Yj9XvMOKzDFAf8XocOG0wgnVYEVDY6Mf4Mhwfxv/IYNZ0Z5whw20hgARsjgfuznnynMgeA4YjpBIJ QdC0Qtvv3ruNn+ZzT1O4gdwiYe9g68T79c2The/mLPt48lCxK9EtyIr9LEEF8SbxcQ7TiRi48jn9b A5B0mMr3kVKQfaUSs0U9ByvyofzVq0JAnwzqqvFr8jeVgrcuibaUGD7DBaS8cl+d5Yb5E5SHE3ApA TJRXz7ky6+8ft/96JCLiwCqzIV+VoslphjadZcqIwew66/JBbLF5pv3zDga9PEO7lTqhI8J9+ect1 u2zgpQMA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1esEzD-00039n-W6; Sat, 03 Mar 2018 21:46:36 +0000 Received: from mail-wm0-x242.google.com ([2a00:1450:400c:c09::242]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1esEwT-0000Ce-KT; Sat, 03 Mar 2018 21:44:08 +0000 Received: by mail-wm0-x242.google.com with SMTP id z9so8945777wmb.3; Sat, 03 Mar 2018 13:43:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=/3SXTkemwMqEcxi8MTRT4Zs/xeCJ78AQoIlEUQkvh9c=; b=liQqOB5h7alRvq1NZerls5SylQD1hC8uM5JWdABCGmFoOc5QohwYETgG6DmIwLIHDZ mUPyRmF72zjuY8ceZWHVhISEHDefpUmPLFbZX3X1k1dKyprrdzR3gFBiRg/kCmEevYT1 kmvdk81vCUNYegtwR0k0J7H0xNmTCeeUtTfR2zLzvi5iP9rQPLJpLZ/Lt3Q1ukNpAdOv 6mDwcoLA9gpDOLMEKw9aFCwVN5wVn3ebxuFAqvHVNMSn/MJg4newmt5XvTCocAm7tuLk 9AWg7xVLNC994964g15+SXeb9/u6t6xgAZlaxIFp5FasHE9nb0xPYVJ2fDXlHsMbcW1s 50qQ== 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; bh=/3SXTkemwMqEcxi8MTRT4Zs/xeCJ78AQoIlEUQkvh9c=; b=ANtudypUzzCZTL/OvWgZ8e6EYyjor1CvEM0Yks6N2zP4Us0BuoR26n2p/d6/UDwVHx iUl6rlze3Abmys4rnw8gLPcVlHJAqeZze9uxvMpQw5iX0H8armDmxoUBhEtsb99IdDke Lgtowtmf8RU8inekVFcFzML9fAgpvOax2ZU1UfytK8P3zpvuS+TsBEQXlI6sdcSKHnls vMo4Aqw3YxQr4lmAFJYrEwsJVypNKVkWO+UNpP+0fc4ymlLwoTnS1MpuvLrsfxuEmL6U 8+EK3Qh86McSx0GnUGcT4g7IwdPKOQeOvjq2uTAtdyF42x+0RMz7wlR1FU/aqGXjvA7B FLZQ== X-Gm-Message-State: AElRT7GDC/Ugp2INp4a/Aqid/RHWrY1kOtw0LFWKByW3s+hzoQSLrMZb wkKhhJJlF158vOOgBmkZS/w= X-Google-Smtp-Source: AG47ELtgLTkkkxlT8BZ6Gtcw2iVf7j6NBm84MnheE49W92/gxEv918UAEMfcgRYwvASo+D/ksFuiBw== X-Received: by 10.28.109.90 with SMTP id i87mr4455681wmc.71.1520113411013; Sat, 03 Mar 2018 13:43:31 -0800 (PST) Received: from blackbox.darklights.net (p5DD9B279.dip0.t-ipconnect.de. [93.217.178.121]) by smtp.googlemail.com with ESMTPSA id 55sm11073171wrz.6.2018.03.03.13.43.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 03 Mar 2018 13:43:30 -0800 (PST) From: Martin Blumenstingl To: linux-usb@vger.kernel.org, mathias.nyman@intel.com, arnd@arndb.de, gregkh@linuxfoundation.org, felipe.balbi@linux.intel.com Subject: [usb-next PATCH v11 2/8] usb: add a flag to skip PHY initialization to struct usb_hcd Date: Sat, 3 Mar 2018 22:43:03 +0100 Message-Id: <20180303214309.25643-3-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180303214309.25643-1-martin.blumenstingl@googlemail.com> References: <20180303214309.25643-1-martin.blumenstingl@googlemail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180303_134346_258764_830F3859 X-CRM114-Status: GOOD ( 16.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, Peter.Chen@nxp.com, Martin Blumenstingl , narmstrong@baylibre.com, yixun.lan@amlogic.com, robh+dt@kernel.org, jonathanh@nvidia.com, linux@prisktech.co.nz, matthias.bgg@gmail.com, thierry.reding@gmail.com, linux-mediatek@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-tegra@vger.kernel.org, stern@rowland.harvard.edu, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The USB HCD core driver parses the device-tree node for "phys" and "usb-phys" properties. It also manages the power state of these PHYs automatically. However, drivers may opt-out of this behavior by setting "phy" or "usb_phy" in struct usb_hcd to a non-null value. An example where this is required is the "Qualcomm USB2 controller", implemented by the chipidea driver. The hardware requires that the PHY is only powered on after the "reset completed" event from the controller is received. A follow-up patch will allow the USB HCD core driver to manage more than one PHY. Add a new "skip_phy_initialization" bitflag to struct usb_hcd so drivers can opt-out of any PHY management provided by the USB HCD core driver. This also updates the existing drivers so they use the new flag if they want to opt out of the PHY management provided by the USB HCD core driver. This means that for these drivers the new "multiple PHY" handling (which will be added in a follow-up patch) will be disabled as well. Signed-off-by: Martin Blumenstingl Acked-by: Peter Chen --- drivers/usb/chipidea/host.c | 6 ++---- drivers/usb/core/hcd.c | 4 ++-- drivers/usb/host/ehci-fsl.c | 2 ++ drivers/usb/host/ehci-platform.c | 4 ++-- drivers/usb/host/ehci-tegra.c | 1 + drivers/usb/host/ohci-omap.c | 1 + drivers/usb/host/ohci-platform.c | 4 ++-- drivers/usb/host/xhci-plat.c | 1 + include/linux/usb/hcd.h | 6 ++++++ 9 files changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index 19d60ed7e41f..af45aa3222b5 100644 --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -124,10 +124,8 @@ static int host_start(struct ci_hdrc *ci) hcd->power_budget = ci->platdata->power_budget; hcd->tpl_support = ci->platdata->tpl_support; - if (ci->phy) - hcd->phy = ci->phy; - else - hcd->usb_phy = ci->usb_phy; + if (ci->phy || ci->usb_phy) + hcd->skip_phy_initialization = 1; ehci = hcd_to_ehci(hcd); ehci->caps = ci->hw_bank.cap; diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index fc32391a34d5..f2307470a31e 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2727,7 +2727,7 @@ int usb_add_hcd(struct usb_hcd *hcd, int retval; struct usb_device *rhdev; - if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->usb_phy) { + if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->skip_phy_initialization) { struct usb_phy *phy = usb_get_phy_dev(hcd->self.sysdev, 0); if (IS_ERR(phy)) { @@ -2745,7 +2745,7 @@ int usb_add_hcd(struct usb_hcd *hcd, } } - if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) { + if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->skip_phy_initialization) { struct phy *phy = phy_get(hcd->self.sysdev, "usb"); if (IS_ERR(phy)) { diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index c5094cb88cd5..0a9fd2022acf 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -155,6 +155,8 @@ static int fsl_ehci_drv_probe(struct platform_device *pdev) retval = -ENODEV; goto err2; } + + hcd->skip_phy_initialization = 1; } #endif return retval; diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c index b065a960adc2..b91eea8c73ae 100644 --- a/drivers/usb/host/ehci-platform.c +++ b/drivers/usb/host/ehci-platform.c @@ -219,9 +219,9 @@ static int ehci_platform_probe(struct platform_device *dev) if (IS_ERR(priv->phys[phy_num])) { err = PTR_ERR(priv->phys[phy_num]); goto err_put_hcd; - } else if (!hcd->phy) { + } else { /* Avoiding phy_get() in usb_add_hcd() */ - hcd->phy = priv->phys[phy_num]; + hcd->skip_phy_initialization = 1; } } diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index c809f7d2f08f..a6f4389f7e88 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -461,6 +461,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_clk_en; } hcd->usb_phy = u_phy; + hcd->skip_phy_initialization = 1; tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node, "nvidia,needs-double-reset"); diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c index 0201c49bc4fc..d8d35d456456 100644 --- a/drivers/usb/host/ohci-omap.c +++ b/drivers/usb/host/ohci-omap.c @@ -230,6 +230,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd) } else { return -EPROBE_DEFER; } + hcd->skip_phy_initialization = 1; ohci->start_hnp = start_hnp; } #endif diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c index 1e6c954f4b3f..62ef36a9333f 100644 --- a/drivers/usb/host/ohci-platform.c +++ b/drivers/usb/host/ohci-platform.c @@ -186,9 +186,9 @@ static int ohci_platform_probe(struct platform_device *dev) if (IS_ERR(priv->phys[phy_num])) { err = PTR_ERR(priv->phys[phy_num]); goto err_put_hcd; - } else if (!hcd->phy) { + } else { /* Avoiding phy_get() in usb_add_hcd() */ - hcd->phy = priv->phys[phy_num]; + hcd->skip_phy_initialization = 1; } } diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index 6f038306c14d..6700e5ee82ad 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -284,6 +284,7 @@ static int xhci_plat_probe(struct platform_device *pdev) ret = usb_phy_init(hcd->usb_phy); if (ret) goto put_usb3_hcd; + hcd->skip_phy_initialization = 1; } ret = usb_add_hcd(hcd, irq, IRQF_SHARED); diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 176900528822..693502c84c04 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -151,6 +151,12 @@ struct usb_hcd { unsigned msix_enabled:1; /* driver has MSI-X enabled? */ unsigned msi_enabled:1; /* driver has MSI enabled? */ unsigned remove_phy:1; /* auto-remove USB phy */ + /* + * do not manage the PHY state in the HCD core, instead let the driver + * handle this (for example if the PHY can only be turned on after a + * specific event) + */ + unsigned skip_phy_initialization:1; /* The next flag is a stopgap, to be removed when all the HCDs * support the new root-hub polling mechanism. */