From patchwork Sat Jul 7 14:56:47 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhao X-Patchwork-Id: 1168881 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 9AC943FE4F for ; Sat, 7 Jul 2012 15:19:35 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SnWcF-0006FB-Rg; Sat, 07 Jul 2012 15:08:12 +0000 Received: from co1ehsobe001.messaging.microsoft.com ([216.32.180.184] helo=co1outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SnWSM-0003wG-Oi for linux-arm-kernel@lists.infradead.org; Sat, 07 Jul 2012 14:58:17 +0000 Received: from mail37-co1-R.bigfish.com (10.243.78.237) by CO1EHSOBE014.bigfish.com (10.243.66.77) with Microsoft SMTP Server id 14.1.225.23; Sat, 7 Jul 2012 14:55:28 +0000 Received: from mail37-co1 (localhost [127.0.0.1]) by mail37-co1-R.bigfish.com (Postfix) with ESMTP id 2EFAC8C0170; Sat, 7 Jul 2012 14:55:28 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1202hzz8275bh8275dhz2dh2a8h668h839hd24he5bhf0ah107ah) Received: from mail37-co1 (localhost.localdomain [127.0.0.1]) by mail37-co1 (MessageSwitch) id 1341672925653416_3526; Sat, 7 Jul 2012 14:55:25 +0000 (UTC) Received: from CO1EHSMHS025.bigfish.com (unknown [10.243.78.237]) by mail37-co1.bigfish.com (Postfix) with ESMTP id 9B98D80004A; Sat, 7 Jul 2012 14:55:25 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CO1EHSMHS025.bigfish.com (10.243.66.35) with Microsoft SMTP Server (TLS) id 14.1.225.23; Sat, 7 Jul 2012 14:55:25 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.2.298.5; Sat, 7 Jul 2012 09:57:34 -0500 Received: from b20223-02.ap.freescale.net (b20223-02.ap.freescale.net [10.192.242.124]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id q67EumuK014596; Sat, 7 Jul 2012 07:57:29 -0700 From: Richard Zhao To: , , Subject: [PATCH v9 REBASE 8/9] usb: otg: add basic mxs phy driver support Date: Sat, 7 Jul 2012 22:56:47 +0800 Message-ID: <1341673008-29808-9-git-send-email-richard.zhao@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1341673008-29808-1-git-send-email-richard.zhao@freescale.com> References: <1341673008-29808-1-git-send-email-richard.zhao@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [216.32.180.184 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: marex@denx.de, B20596@freescale.com, dong.aisheng@linaro.org, fabio.estevam@freescale.com, alexander.shishkin@linux.intel.com, B29397@freescale.com, balbi@ti.com, stern@rowland.harvard.edu, Peter Chen , kernel@pengutronix.de, gregkh@linuxfoundation.org, richard.zhao@freescale.com, shawn.guo@linaro.org, mkl@pengutronix.de, linuxzsc@gmail.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org mxs phy is used in Freescale i.MX SoCs, for example imx23, imx28, imx6Q. This patch adds the basic host support. Signed-off-by: Richard Zhao Signed-off-by: Marek Vasut Cc: Peter Chen Acked-by: Felipe Balbi Tested-by: Subodh Nijsure --- Documentation/devicetree/bindings/usb/mxs-phy.txt | 13 ++ drivers/usb/otg/Kconfig | 10 ++ drivers/usb/otg/Makefile | 1 + drivers/usb/otg/mxs-phy.c | 186 +++++++++++++++++++++ 4 files changed, 210 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/mxs-phy.txt create mode 100644 drivers/usb/otg/mxs-phy.c diff --git a/Documentation/devicetree/bindings/usb/mxs-phy.txt b/Documentation/devicetree/bindings/usb/mxs-phy.txt new file mode 100644 index 0000000..5835b27 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/mxs-phy.txt @@ -0,0 +1,13 @@ +* Freescale MXS USB Phy Device + +Required properties: +- compatible: Should be "fsl,imx23-usbphy" +- reg: Should contain registers location and length +- interrupts: Should contain phy interrupt + +Example: +usbphy1: usbphy@020c9000 { + compatible = "fsl,imx6q-usbphy", "fsl,imx23-usbphy"; + reg = <0x020c9000 0x1000>; + interrupts = <0 44 0x04>; +}; diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig index 5c87db0..13fd1ddf 100644 --- a/drivers/usb/otg/Kconfig +++ b/drivers/usb/otg/Kconfig @@ -116,6 +116,16 @@ config FSL_USB2_OTG help Enable this to support Freescale USB OTG transceiver. +config USB_MXS_PHY + tristate "Freescale MXS USB PHY support" + depends on ARCH_MXC || ARCH_MXS + select STMP_DEVICE + select USB_OTG_UTILS + help + Enable this to support the Freescale MXS USB PHY. + + MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x. + config USB_MV_OTG tristate "Marvell USB OTG support" depends on USB_EHCI_MV && USB_MV_UDC && USB_SUSPEND diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile index 41aa509..a844b8d 100644 --- a/drivers/usb/otg/Makefile +++ b/drivers/usb/otg/Makefile @@ -20,4 +20,5 @@ obj-$(CONFIG_USB_MSM_OTG) += msm_otg.o obj-$(CONFIG_AB8500_USB) += ab8500-usb.o fsl_usb2_otg-objs := fsl_otg.o otg_fsm.o obj-$(CONFIG_FSL_USB2_OTG) += fsl_usb2_otg.o +obj-$(CONFIG_USB_MXS_PHY) += mxs-phy.o obj-$(CONFIG_USB_MV_OTG) += mv_otg.o diff --git a/drivers/usb/otg/mxs-phy.c b/drivers/usb/otg/mxs-phy.c new file mode 100644 index 0000000..c1a67cb --- /dev/null +++ b/drivers/usb/otg/mxs-phy.c @@ -0,0 +1,186 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * Copyright (C) 2012 Marek Vasut + * on behalf of DENX Software Engineering GmbH + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_NAME "mxs_phy" + +#define HW_USBPHY_PWD 0x00 +#define HW_USBPHY_CTRL 0x30 +#define HW_USBPHY_CTRL_SET 0x34 +#define HW_USBPHY_CTRL_CLR 0x38 + +#define BM_USBPHY_CTRL_SFTRST BIT(31) +#define BM_USBPHY_CTRL_CLKGATE BIT(30) +#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15) +#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14) +#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) + +struct mxs_phy { + struct usb_phy phy; + struct clk *clk; +}; + +#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) + +static void mxs_phy_hw_init(struct mxs_phy *mxs_phy) +{ + void __iomem *base = mxs_phy->phy.io_priv; + + stmp_reset_block(base + HW_USBPHY_CTRL); + + /* Power up the PHY */ + writel_relaxed(0, base + HW_USBPHY_PWD); + + /* enable FS/LS device */ + writel_relaxed(BM_USBPHY_CTRL_ENUTMILEVEL2 | + BM_USBPHY_CTRL_ENUTMILEVEL3, + base + HW_USBPHY_CTRL_SET); +} + +static int mxs_phy_init(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + + clk_prepare_enable(mxs_phy->clk); + mxs_phy_hw_init(mxs_phy); + + return 0; +} + +static void mxs_phy_shutdown(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + + writel_relaxed(BM_USBPHY_CTRL_CLKGATE, + phy->io_priv + HW_USBPHY_CTRL_SET); + + clk_disable_unprepare(mxs_phy->clk); +} + +static int mxs_phy_on_connect(struct usb_phy *phy, int port) +{ + dev_dbg(phy->dev, "Connect on port %d\n", port); + + mxs_phy_hw_init(to_mxs_phy(phy)); + writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_SET); + + return 0; +} + +static int mxs_phy_on_disconnect(struct usb_phy *phy, int port) +{ + dev_dbg(phy->dev, "Disconnect on port %d\n", port); + + writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_CLR); + + return 0; +} + +static int mxs_phy_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + struct clk *clk; + struct mxs_phy *mxs_phy; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "can't get device resources\n"); + return -ENOENT; + } + + base = devm_request_and_ioremap(&pdev->dev, res); + if (!base) + return -EBUSY; + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, + "can't get the clock, err=%ld", PTR_ERR(clk)); + return PTR_ERR(clk); + } + + mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL); + if (!mxs_phy) { + dev_err(&pdev->dev, "Failed to allocate USB PHY structure!\n"); + return -ENOMEM; + } + + mxs_phy->phy.io_priv = base; + mxs_phy->phy.dev = &pdev->dev; + mxs_phy->phy.label = DRIVER_NAME; + mxs_phy->phy.init = mxs_phy_init; + mxs_phy->phy.shutdown = mxs_phy_shutdown; + mxs_phy->phy.notify_connect = mxs_phy_on_connect; + mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; + + ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier); + + mxs_phy->clk = clk; + + platform_set_drvdata(pdev, &mxs_phy->phy); + + return 0; +} + +static int __devexit mxs_phy_remove(struct platform_device *pdev) +{ + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static const struct of_device_id mxs_phy_dt_ids[] = { + { .compatible = "fsl,imx23-usbphy", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids); + +static struct platform_driver mxs_phy_driver = { + .probe = mxs_phy_probe, + .remove = __devexit_p(mxs_phy_remove), + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = mxs_phy_dt_ids, + }, +}; + +static int __init mxs_phy_module_init(void) +{ + return platform_driver_register(&mxs_phy_driver); +} +postcore_initcall(mxs_phy_module_init); + +static void __exit mxs_phy_module_exit(void) +{ + platform_driver_unregister(&mxs_phy_driver); +} +module_exit(mxs_phy_module_exit); + +MODULE_ALIAS("platform:mxs-usb-phy"); +MODULE_AUTHOR("Marek Vasut "); +MODULE_AUTHOR("Richard Zhao "); +MODULE_DESCRIPTION("Freescale MXS USB PHY driver"); +MODULE_LICENSE("GPL");