From patchwork Mon Apr 28 09:25:32 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Gautam X-Patchwork-Id: 4075951 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6C5199F271 for ; Mon, 28 Apr 2014 09:26:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5322C20251 for ; Mon, 28 Apr 2014 09:26:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C602201F4 for ; Mon, 28 Apr 2014 09:26:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754834AbaD1J0I (ORCPT ); Mon, 28 Apr 2014 05:26:08 -0400 Received: from mail-pb0-f51.google.com ([209.85.160.51]:52714 "EHLO mail-pb0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754251AbaD1J0F (ORCPT ); Mon, 28 Apr 2014 05:26:05 -0400 Received: by mail-pb0-f51.google.com with SMTP id rq2so699498pbb.38 for ; Mon, 28 Apr 2014 02:26:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=EeWadxfn+jDjdUXuRRHONGay2N4UIG50bcG8shmLxu4=; b=x1mRnOEulsdoR1VMHbqJNsT5//YwvB2DKwfpv+h0Y7OMEZeFSYcXVX8AGcA++OBNEN KP04rMDDAuQZdGdoBiLiH7n0NJrMaxSg0C6Y85sVuBXD8Gsm/6G316WY28Do7V8efLNN c9L3pkG7HJ/L+Esv1/cLZ2E59tyUtWlVj5YMcbCpeSBGivtN0ETjJ+fuxm1kv9oMNDsI gXtW1k88PK6AQEGTbhfH7b70ExULZqE8CyfajGK1zfCV4zSU5iVnh0ygzaDAbxazApRa IWbHf/2m9yBC+J8oWvCZFEtnSXv4y18HNKsjXlG7pkqa/DGmShnGfM9Q5bd6kommOSZB 9kDg== X-Received: by 10.66.177.168 with SMTP id cr8mr7346945pac.128.1398677164691; Mon, 28 Apr 2014 02:26:04 -0700 (PDT) Received: from vivek-linuxpc.sisodomain.com ([115.113.119.130]) by mx.google.com with ESMTPSA id xz7sm88411846pac.3.2014.04.28.02.26.00 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 28 Apr 2014 02:26:04 -0700 (PDT) From: Vivek Gautam To: linux-usb@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, gregkh@linuxfoundation.org, balbi@ti.com, kgene.kim@samsung.com, k.debski@samsung.com, Vivek Gautam , Jingoo Han , Alan Stern Subject: [PATCH v9 4/4] usb: ehci-exynos: Change to use phy provided by the generic phy framework Date: Mon, 28 Apr 2014 14:55:32 +0530 Message-Id: <1398677132-30600-5-git-send-email-gautam.vivek@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1398677132-30600-1-git-send-email-gautam.vivek@samsung.com> References: <1398677132-30600-1-git-send-email-gautam.vivek@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,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 From: Kamil Debski Add the phy provider, supplied by new Exynos-usb2phy using Generic phy framework. Keeping the support for older USB phy intact right now, in order to prevent any functionality break in absence of relevant device tree side change for ehci-exynos. Once we move to new phy in the device nodes for ehci, we can remove the support for older phys. Signed-off-by: Kamil Debski [gautam.vivek@samsung.com: Addressed review comments from mailing list] [gautam.vivek@samsung.com: Kept the code for old usb-phy, and just added support for new exynos5-usb2phy in generic phy framework] [gautam.vivek@samsung.com: Edited the commit message] Signed-off-by: Vivek Gautam Cc: Jingoo Han Cc: Alan Stern --- .../devicetree/bindings/usb/exynos-usb.txt | 18 +++ drivers/usb/host/ehci-exynos.c | 143 +++++++++++++++++--- 2 files changed, 141 insertions(+), 20 deletions(-) diff --git a/Documentation/devicetree/bindings/usb/exynos-usb.txt b/Documentation/devicetree/bindings/usb/exynos-usb.txt index 03b7e43..4f368b0 100644 --- a/Documentation/devicetree/bindings/usb/exynos-usb.txt +++ b/Documentation/devicetree/bindings/usb/exynos-usb.txt @@ -12,6 +12,15 @@ Required properties: - interrupts: interrupt number to the cpu. - clocks: from common clock binding: handle to usb clock. - clock-names: from common clock binding: Shall be "usbhost". + - port: if in the SoC there are EHCI phys, they should be listed here. + One phy per port. Each port should have its 'reg' entry. + - reg: port number on EHCI controller, e.g + On Exynos5250, port 0 is USB2.0 otg phy + port 1 is HSIC phy0 + port 2 is HSIC phy1 + - phys: from the *Generic PHY* bindings; specifying phy used by port. + - phy-names: from the *Generic PHY* bindings; specifying name of phy + used by the port. Optional properties: - samsung,vbus-gpio: if present, specifies the GPIO that @@ -27,6 +36,15 @@ Example: clocks = <&clock 285>; clock-names = "usbhost"; + + #address-cells = <1>; + #size-cells = <0>; + port@0 { + reg = <0>; + phys = <&usb2phy 1>; + phy-names = "host"; + status = "disabled"; + }; }; OHCI diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c index 4d763dc..caeadb4 100644 --- a/drivers/usb/host/ehci-exynos.c +++ b/drivers/usb/host/ehci-exynos.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -42,14 +43,119 @@ static const char hcd_name[] = "ehci-exynos"; static struct hc_driver __read_mostly exynos_ehci_hc_driver; +#define PHY_NUMBER 3 struct exynos_ehci_hcd { struct clk *clk; struct usb_phy *phy; struct usb_otg *otg; + struct phy *phy_g[PHY_NUMBER]; }; #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv) +static int exynos_ehci_get_phy(struct device *dev, + struct exynos_ehci_hcd *exynos_ehci) +{ + struct device_node *child; + struct phy *phy; + int phy_number; + int ret = 0; + + exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); + if (IS_ERR(exynos_ehci->phy)) { + ret = PTR_ERR(exynos_ehci->phy); + /* This is the case when PHY config is disabled */ + if (ret == -ENXIO || ret == -ENODEV) { + dev_dbg(dev, "Failed to get usb2 phy\n"); + exynos_ehci->phy = NULL; + ret = 0; + } else if (ret == -EPROBE_DEFER) { + goto fail_phy; + } else { + dev_err(dev, "no usb2 phy configured\n"); + goto fail_phy; + } + } else { + exynos_ehci->otg = exynos_ehci->phy->otg; + } + + for_each_available_child_of_node(dev->of_node, child) { + ret = of_property_read_u32(child, "reg", &phy_number); + if (ret) { + dev_err(dev, "Failed to parse device tree\n"); + of_node_put(child); + goto fail_phy; + } + if (phy_number >= PHY_NUMBER) { + dev_err(dev, "Invalid number of PHYs\n"); + of_node_put(child); + ret = -EINVAL; + goto fail_phy; + } + phy = devm_of_phy_get(dev, child, 0); + of_node_put(child); + if (IS_ERR(phy)) { + ret = PTR_ERR(phy); + /* This is the case when PHY config is disabled */ + if (ret == -ENOSYS || ret == -ENODEV) { + dev_dbg(dev, "Failed to get usb2 phy\n"); + phy = NULL; + ret = 0; + } else if (ret == -EPROBE_DEFER) { + goto fail_phy; + } else { + dev_err(dev, "no usb2 phy configured\n"); + goto fail_phy; + } + } + exynos_ehci->phy_g[phy_number] = phy; + } + +fail_phy: + return ret; +} + +static int exynos_ehci_phy_enable(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd); + int i; + int ret = 0; + + if (exynos_ehci->phy) { + ret = usb_phy_init(exynos_ehci->phy); + if (ret) + return ret; + } + + for (i = 0; ret == 0 && i < PHY_NUMBER; i++) + if (exynos_ehci->phy_g[i]) + ret = phy_power_on(exynos_ehci->phy_g[i]); + if (ret) + for (i--; i >= 0; i--) + if (exynos_ehci->phy_g[i]) + phy_power_off(exynos_ehci->phy_g[i]); + + return ret; +} + +static int exynos_ehci_phy_disable(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd); + int i; + int ret = 0; + + if (exynos_ehci->phy) + usb_phy_shutdown(exynos_ehci->phy); + + for (i = 0; i < PHY_NUMBER; i++) + if (exynos_ehci->phy_g[i]) + ret = phy_power_off(exynos_ehci->phy_g[i]); + + return ret; +} + static void exynos_setup_vbus_gpio(struct device *dev) { int err; @@ -74,7 +180,6 @@ static int exynos_ehci_probe(struct platform_device *pdev) struct usb_hcd *hcd; struct ehci_hcd *ehci; struct resource *res; - struct usb_phy *phy; int irq; int err; @@ -101,15 +206,9 @@ static int exynos_ehci_probe(struct platform_device *pdev) "samsung,exynos5440-ehci")) goto skip_phy; - phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); - if (IS_ERR(phy)) { - usb_put_hcd(hcd); - dev_warn(&pdev->dev, "no platform data or transceiver defined\n"); - return -EPROBE_DEFER; - } else { - exynos_ehci->phy = phy; - exynos_ehci->otg = phy->otg; - } + err = exynos_ehci_get_phy(&pdev->dev, exynos_ehci); + if (err) + goto fail_clk; skip_phy: @@ -151,8 +250,11 @@ skip_phy: if (exynos_ehci->otg) exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - if (exynos_ehci->phy) - usb_phy_init(exynos_ehci->phy); + err = exynos_ehci_phy_enable(&pdev->dev); + if (err) { + dev_err(&pdev->dev, "Failed to enable USB phy\n"); + goto fail_io; + } ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; @@ -172,8 +274,7 @@ skip_phy: return 0; fail_add_hcd: - if (exynos_ehci->phy) - usb_phy_shutdown(exynos_ehci->phy); + exynos_ehci_phy_disable(&pdev->dev); fail_io: clk_disable_unprepare(exynos_ehci->clk); fail_clk: @@ -191,8 +292,7 @@ static int exynos_ehci_remove(struct platform_device *pdev) if (exynos_ehci->otg) exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - if (exynos_ehci->phy) - usb_phy_shutdown(exynos_ehci->phy); + exynos_ehci_phy_disable(&pdev->dev); clk_disable_unprepare(exynos_ehci->clk); @@ -217,8 +317,7 @@ static int exynos_ehci_suspend(struct device *dev) if (exynos_ehci->otg) exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - if (exynos_ehci->phy) - usb_phy_shutdown(exynos_ehci->phy); + exynos_ehci_phy_disable(dev); clk_disable_unprepare(exynos_ehci->clk); @@ -229,14 +328,18 @@ static int exynos_ehci_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd); + int ret; clk_prepare_enable(exynos_ehci->clk); if (exynos_ehci->otg) exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - if (exynos_ehci->phy) - usb_phy_init(exynos_ehci->phy); + ret = exynos_ehci_phy_enable(dev); + if (ret) { + dev_err(dev, "Failed to enable USB phy\n"); + return ret; + } /* DMA burst Enable */ writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));