From patchwork Fri Jan 10 22:46:20 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 309445 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 2C2522C009A for ; Sat, 11 Jan 2014 09:46:57 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751449AbaAJWqz (ORCPT ); Fri, 10 Jan 2014 17:46:55 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56451 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751152AbaAJWqx (ORCPT ); Fri, 10 Jan 2014 17:46:53 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s0AMkTYV009468 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 10 Jan 2014 17:46:29 -0500 Received: from shalem.localdomain.com (vpn1-6-155.ams2.redhat.com [10.36.6.155]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s0AMkMJL032340; Fri, 10 Jan 2014 17:46:27 -0500 From: Hans de Goede To: Alan Stern , Tony Prisk Cc: linux-arm-kernel@lists.infradead.org, devicetree , linux-usb , linux-sunxi@googlegroups.com, Hans de Goede Subject: [PATCH v4 2/2] ehci-platform: Add support for clks and phy passed through devicetree Date: Fri, 10 Jan 2014 23:46:20 +0100 Message-Id: <1389393980-21183-3-git-send-email-hdegoede@redhat.com> In-Reply-To: <1389393980-21183-1-git-send-email-hdegoede@redhat.com> References: <1389393980-21183-1-git-send-email-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Currently ehci-platform is only used in combination with devicetree when used with some Via socs. By extending it to (optionally) get clks and a phy from devicetree, and enabling / disabling those on power_on / off, it can be used more generically. Specifically after this commit it can be used for the ehci controller on Allwinner sunxi SoCs. Somehow we've ended up with 2 device-bindings documents for ehci-platform.c, this patch renames and updates one to mmio-ehci.txt to reflect that this is a generic ehci driver, and removes the other. Signed-off-by: Hans de Goede --- .../devicetree/bindings/usb/mmio-ehci.txt | 22 +++ .../devicetree/bindings/usb/via,vt8500-ehci.txt | 15 --- .../devicetree/bindings/usb/vt8500-ehci.txt | 12 -- drivers/usb/host/ehci-platform.c | 149 +++++++++++++++++---- 4 files changed, 145 insertions(+), 53 deletions(-) create mode 100644 Documentation/devicetree/bindings/usb/mmio-ehci.txt delete mode 100644 Documentation/devicetree/bindings/usb/via,vt8500-ehci.txt delete mode 100644 Documentation/devicetree/bindings/usb/vt8500-ehci.txt diff --git a/Documentation/devicetree/bindings/usb/mmio-ehci.txt b/Documentation/devicetree/bindings/usb/mmio-ehci.txt new file mode 100644 index 0000000..bc0f967 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/mmio-ehci.txt @@ -0,0 +1,22 @@ +Generic MMIO EHCI controller + +Required properties: +- compatible : "via,vt8500-ehci", "wm,prizm-ehci", or "mmio-ehci" +- reg : ehci controller register range (address and length) +- interrupts : ehci controller interrupt + +Optional properties: +- clocks : a list of phandle + clock specifier pairs +- phys : phandle + phy specifier pair +- phy-names : "usb" + +Example: + + ehci@d8007900 { + compatible = "via,vt8500-ehci", "mmio-ehci"; + reg = <0xd8007900 0x200>; + interrupts = <43>; + clocks = <&usb_clk 6>, <&ahb_gates 2>; + phys = <&usbphy 1>; + phy-names = "usb"; + }; diff --git a/Documentation/devicetree/bindings/usb/via,vt8500-ehci.txt b/Documentation/devicetree/bindings/usb/via,vt8500-ehci.txt deleted file mode 100644 index 17b3ad1..0000000 --- a/Documentation/devicetree/bindings/usb/via,vt8500-ehci.txt +++ /dev/null @@ -1,15 +0,0 @@ -VIA/Wondermedia VT8500 EHCI Controller ------------------------------------------------------ - -Required properties: -- compatible : "via,vt8500-ehci" -- reg : Should contain 1 register ranges(address and length) -- interrupts : ehci controller interrupt - -Example: - - ehci@d8007900 { - compatible = "via,vt8500-ehci"; - reg = <0xd8007900 0x200>; - interrupts = <43>; - }; diff --git a/Documentation/devicetree/bindings/usb/vt8500-ehci.txt b/Documentation/devicetree/bindings/usb/vt8500-ehci.txt deleted file mode 100644 index 5fb8fd6..0000000 --- a/Documentation/devicetree/bindings/usb/vt8500-ehci.txt +++ /dev/null @@ -1,12 +0,0 @@ -VIA VT8500 and Wondermedia WM8xxx SoC USB controllers. - -Required properties: - - compatible: Should be "via,vt8500-ehci" or "wm,prizm-ehci". - - reg: Address range of the ehci registers. size should be 0x200 - - interrupts: Should contain the ehci interrupt. - -usb: ehci@D8007100 { - compatible = "wm,prizm-ehci", "usb-ehci"; - reg = <0xD8007100 0x200>; - interrupts = <1>; -}; diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c index 7f30b71..dd51644 100644 --- a/drivers/usb/host/ehci-platform.c +++ b/drivers/usb/host/ehci-platform.c @@ -3,6 +3,7 @@ * * Copyright 2007 Steven Brown * Copyright 2010-2012 Hauke Mehrtens + * Copyright 2014 Hans de Goede * * Derived from the ohci-ssb driver * Copyright 2007 Michael Buesch @@ -18,6 +19,7 @@ * * Licensed under the GNU/GPL. See COPYING for details. */ +#include #include #include #include @@ -25,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -33,6 +36,13 @@ #include "ehci.h" #define DRIVER_DESC "EHCI generic platform driver" +#define EHCI_MAX_CLKS 3 +#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv) + +struct ehci_platform_priv { + struct clk *clks[EHCI_MAX_CLKS]; + struct phy *phy; +}; static const char hcd_name[] = "ehci-platform"; @@ -64,38 +74,90 @@ static int ehci_platform_reset(struct usb_hcd *hcd) return 0; } +static int ehci_platform_power_on(struct platform_device *dev) +{ + struct usb_hcd *hcd = platform_get_drvdata(dev); + struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd); + int clk, ret; + + for (clk = 0; priv->clks[clk] && clk < EHCI_MAX_CLKS; clk++) { + ret = clk_prepare_enable(priv->clks[clk]); + if (ret) + goto err_disable_clks; + } + + if (priv->phy) { + ret = phy_init(priv->phy); + if (ret) + goto err_disable_clks; + + ret = phy_power_on(priv->phy); + if (ret) + goto err_exit_phy; + } + + return 0; + +err_exit_phy: + phy_exit(priv->phy); +err_disable_clks: + while (--clk >= 0) + clk_disable_unprepare(priv->clks[clk]); + + return ret; +} + +static void ehci_platform_power_off(struct platform_device *dev) +{ + struct usb_hcd *hcd = platform_get_drvdata(dev); + struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd); + int clk; + + if (priv->phy) { + phy_power_off(priv->phy); + phy_exit(priv->phy); + } + + for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--) + if (priv->clks[clk]) + clk_disable_unprepare(priv->clks[clk]); +} + static struct hc_driver __read_mostly ehci_platform_hc_driver; static const struct ehci_driver_overrides platform_overrides __initconst = { - .reset = ehci_platform_reset, + .reset = ehci_platform_reset, + .extra_priv_size = sizeof(struct ehci_platform_priv), }; -static struct usb_ehci_pdata ehci_platform_defaults; +static struct usb_ehci_pdata ehci_platform_defaults = { + .power_on = ehci_platform_power_on, + .power_suspend = ehci_platform_power_off, + .power_off = ehci_platform_power_off, +}; static int ehci_platform_probe(struct platform_device *dev) { struct usb_hcd *hcd; struct resource *res_mem; - struct usb_ehci_pdata *pdata; - int irq; - int err; + struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev); + struct ehci_platform_priv *priv; + int clk, irq, err; if (usb_disabled()) return -ENODEV; /* - * use reasonable defaults so platforms don't have to provide these. - * with DT probing on ARM, none of these are set. + * Use reasonable defaults so platforms don't have to provide these + * with DT probing on ARM. */ - if (!dev_get_platdata(&dev->dev)) - dev->dev.platform_data = &ehci_platform_defaults; + if (!pdata) + pdata = &ehci_platform_defaults; err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32)); if (err) return err; - pdata = dev_get_platdata(&dev->dev); - irq = platform_get_irq(dev, 0); if (irq < 0) { dev_err(&dev->dev, "no irq provided"); @@ -107,17 +169,40 @@ static int ehci_platform_probe(struct platform_device *dev) return -ENXIO; } + hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev, + dev_name(&dev->dev)); + if (!hcd) + return -ENOMEM; + + platform_set_drvdata(dev, hcd); + dev->dev.platform_data = pdata; + priv = hcd_to_ehci_priv(hcd); + + if (pdata == &ehci_platform_defaults && dev->dev.of_node) { + priv->phy = devm_phy_get(&dev->dev, "usb"); + if (IS_ERR(priv->phy)) { + err = PTR_ERR(priv->phy); + if (err == -EPROBE_DEFER) + goto err_put_hcd; + priv->phy = NULL; + } + + for (clk = 0; clk < EHCI_MAX_CLKS; clk++) { + priv->clks[clk] = of_clk_get(dev->dev.of_node, clk); + if (IS_ERR(priv->clks[clk])) { + err = PTR_ERR(priv->clks[clk]); + if (err == -EPROBE_DEFER) + goto err_put_clks; + priv->clks[clk] = NULL; + break; + } + } + } + if (pdata->power_on) { err = pdata->power_on(dev); if (err < 0) - return err; - } - - hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev, - dev_name(&dev->dev)); - if (!hcd) { - err = -ENOMEM; - goto err_power; + goto err_put_clks; } hcd->rsrc_start = res_mem->start; @@ -126,21 +211,25 @@ static int ehci_platform_probe(struct platform_device *dev) hcd->regs = devm_ioremap_resource(&dev->dev, res_mem); if (IS_ERR(hcd->regs)) { err = PTR_ERR(hcd->regs); - goto err_put_hcd; + goto err_power; } err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) - goto err_put_hcd; - - platform_set_drvdata(dev, hcd); + goto err_power; return err; -err_put_hcd: - usb_put_hcd(hcd); err_power: if (pdata->power_off) pdata->power_off(dev); +err_put_clks: + while (--clk >= 0) + clk_put(priv->clks[clk]); +err_put_hcd: + if (pdata == &ehci_platform_defaults) + dev->dev.platform_data = NULL; + + usb_put_hcd(hcd); return err; } @@ -149,13 +238,19 @@ static int ehci_platform_remove(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev); + struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd); + int clk; usb_remove_hcd(hcd); - usb_put_hcd(hcd); if (pdata->power_off) pdata->power_off(dev); + for (clk = 0; priv->clks[clk] && clk < EHCI_MAX_CLKS; clk++) + clk_put(priv->clks[clk]); + + usb_put_hcd(hcd); + if (pdata == &ehci_platform_defaults) dev->dev.platform_data = NULL; @@ -206,8 +301,10 @@ static int ehci_platform_resume(struct device *dev) static const struct of_device_id vt8500_ehci_ids[] = { { .compatible = "via,vt8500-ehci", }, { .compatible = "wm,prizm-ehci", }, + { .compatible = "mmio-ehci", }, {} }; +MODULE_DEVICE_TABLE(of, vt8500_ehci_ids); static const struct platform_device_id ehci_platform_table[] = { { "ehci-platform", 0 },