From patchwork Fri Sep 12 19:28:07 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Gross X-Patchwork-Id: 4897851 Return-Path: X-Original-To: patchwork-linux-arm@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 620589F537 for ; Fri, 12 Sep 2014 19:26:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8AC6420123 for ; Fri, 12 Sep 2014 19:31:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 13A3A20219 for ; Fri, 12 Sep 2014 19:31:13 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XSWWT-0006vb-Of; Fri, 12 Sep 2014 19:28:45 +0000 Received: from smtp.codeaurora.org ([198.145.11.231]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XSWWK-0006pR-SJ for linux-arm-kernel@lists.infradead.org; Fri, 12 Sep 2014 19:28:37 +0000 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 40779140AE9; Fri, 12 Sep 2014 19:28:18 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 31895140AEB; Fri, 12 Sep 2014 19:28:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (rrcs-67-52-129-61.west.biz.rr.com [67.52.129.61]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: agross@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 8C273140AE9; Fri, 12 Sep 2014 19:28:17 +0000 (UTC) From: Andy Gross To: Felipe Balbi Subject: [Patch v9 2/3] usb: dwc3: Add Qualcomm DWC3 glue layer driver Date: Fri, 12 Sep 2014 14:28:07 -0500 Message-Id: <1410550088-8754-3-git-send-email-agross@codeaurora.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1410550088-8754-1-git-send-email-agross@codeaurora.org> References: <1410550088-8754-1-git-send-email-agross@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140912_122837_008289_4F0D2262 X-CRM114-Status: GOOD ( 17.48 ) X-Spam-Score: -2.2 (--) Cc: devicetree@vger.kernel.org, Jack Pham , Bjorn Andersson , linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kishon Vijay Abraham I , "Ivan T. Ivanov" , Kumar Gala , linux-arm-kernel@lists.infradead.org, Andy Gross X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 From: "Ivan T. Ivanov" DWC3 glue layer is hardware layer around Synopsys DesignWare USB3 core. Its purpose is to supply Synopsys IP with required clocks, voltages and interface it with the rest of the SoC. Signed-off-by: Ivan T. Ivanov Signed-off-by: Andy Gross --- drivers/usb/dwc3/Kconfig | 8 +++ drivers/usb/dwc3/Makefile | 1 + drivers/usb/dwc3/dwc3-qcom.c | 131 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 drivers/usb/dwc3/dwc3-qcom.c diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 785510a..a816fe4 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -80,6 +80,14 @@ config USB_DWC3_KEYSTONE Support of USB2/3 functionality in TI Keystone2 platforms. Say 'Y' or 'M' here if you have one such device +config USB_DWC3_QCOM + tristate "Qualcomm Platforms" + depends on ARCH_QCOM || COMPILE_TEST + default USB_DWC3 + help + Recent Qualcomm SoCs ship with one DesignWare Core USB3 IP inside, + say 'Y' or 'M' if you have one such device. + comment "Debugging features" config USB_DWC3_DEBUG diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index 10ac3e7..0da8e75 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -33,3 +33,4 @@ obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o obj-$(CONFIG_USB_DWC3_EXYNOS) += dwc3-exynos.o obj-$(CONFIG_USB_DWC3_PCI) += dwc3-pci.o obj-$(CONFIG_USB_DWC3_KEYSTONE) += dwc3-keystone.o +obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c new file mode 100644 index 0000000..f255335 --- /dev/null +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -0,0 +1,131 @@ +/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include + +struct dwc3_qcom { + struct device *dev; + + struct clk *core_clk; + struct clk *iface_clk; + struct clk *sleep_clk; +}; + +static int dwc3_qcom_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct dwc3_qcom *qdwc; + int ret = 0; + + qdwc = devm_kzalloc(&pdev->dev, sizeof(*qdwc), GFP_KERNEL); + if (!qdwc) + return -ENOMEM; + + platform_set_drvdata(pdev, qdwc); + + qdwc->dev = &pdev->dev; + + qdwc->core_clk = devm_clk_get(qdwc->dev, "core"); + if (IS_ERR(qdwc->core_clk)) { + dev_err(qdwc->dev, "failed to get core clock\n"); + return PTR_ERR(qdwc->core_clk); + } + + qdwc->iface_clk = devm_clk_get(qdwc->dev, "iface"); + if (IS_ERR(qdwc->iface_clk)) { + dev_dbg(qdwc->dev, "failed to get optional iface clock\n"); + qdwc->iface_clk = NULL; + } + + qdwc->sleep_clk = devm_clk_get(qdwc->dev, "sleep"); + if (IS_ERR(qdwc->sleep_clk)) { + dev_dbg(qdwc->dev, "failed to get optional sleep clock\n"); + qdwc->sleep_clk = NULL; + } + + ret = clk_prepare_enable(qdwc->core_clk); + if (ret) { + dev_err(qdwc->dev, "failed to enable core clock\n"); + goto err_core; + } + + ret = clk_prepare_enable(qdwc->iface_clk); + if (ret) { + dev_err(qdwc->dev, "failed to enable optional iface clock\n"); + goto err_iface; + } + + ret = clk_prepare_enable(qdwc->sleep_clk); + if (ret) { + dev_err(qdwc->dev, "failed to enable optional sleep clock\n"); + goto err_sleep; + } + + ret = of_platform_populate(node, NULL, NULL, qdwc->dev); + if (ret) { + dev_err(qdwc->dev, "failed to register core - %d\n", ret); + goto err_clks; + } + + return 0; + +err_clks: + clk_disable_unprepare(qdwc->sleep_clk); +err_sleep: + clk_disable_unprepare(qdwc->iface_clk); +err_iface: + clk_disable_unprepare(qdwc->core_clk); +err_core: + return ret; +} + +static int dwc3_qcom_remove(struct platform_device *pdev) +{ + struct dwc3_qcom *qdwc = platform_get_drvdata(pdev); + + of_platform_depopulate(&pdev->dev); + + clk_disable_unprepare(qdwc->sleep_clk); + clk_disable_unprepare(qdwc->iface_clk); + clk_disable_unprepare(qdwc->core_clk); + + return 0; +} + +static const struct of_device_id of_dwc3_match[] = { + { .compatible = "qcom,dwc3" }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_dwc3_match); + +static struct platform_driver dwc3_qcom_driver = { + .probe = dwc3_qcom_probe, + .remove = dwc3_qcom_remove, + .driver = { + .name = "qcom-dwc3", + .owner = THIS_MODULE, + .of_match_table = of_dwc3_match, + }, +}; + +module_platform_driver(dwc3_qcom_driver); + +MODULE_ALIAS("platform:qcom-dwc3"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("DesignWare USB3 QCOM Glue Layer"); +MODULE_AUTHOR("Ivan T. Ivanov ");