From patchwork Fri Jun 29 08:39:01 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kunihiko Hayashi X-Patchwork-Id: 10495849 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 31FE1601C7 for ; Fri, 29 Jun 2018 08:40:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E847299D1 for ; Fri, 29 Jun 2018 08:40:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 122D1299DC; Fri, 29 Jun 2018 08:40:55 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI 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 75FF6299D1 for ; Fri, 29 Jun 2018 08:40:54 +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=4f+Y1qtCCWh2w744LYQJmdsAC+O5K07xBcYcTdt3FTo=; b=CpetbmNryoNKAmAQyUqNDYgVZf VgZ1WcIR12eBHcKiOZHwKLxZikndx6Mf350bnVf5bVUEJ4lhiahuUWg7fVo5+/nOgtUwV1u12bCgy 4GaNfGaP1AbAGPeELnycwKhtpryOJ8se16gqgKNKwYv4GctRS69ZWm5zwkARyQE78+Dkg2CpyO3So FWd4xTlE/8LEA1Hpcm9UxaHryczuT5MDg/g2HxzEJX8kFdeqhnL/L5DXJ/qWm35OvBp+Jw8Tj6t4K nguWX0f7FO5XAp9b6amT9gdKuMQi7kH2Ydzg6oh8+3DrRjpeY8YBOk5YyVnENRBOSN1xX0jaW895i 2r2kvjkQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fYoxT-0003o4-L1; Fri, 29 Jun 2018 08:40:47 +0000 Received: from mx.socionext.com ([202.248.49.38]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fYow7-0001U7-CI for linux-arm-kernel@lists.infradead.org; Fri, 29 Jun 2018 08:39:28 +0000 Received: from unknown (HELO kinkan-ex.css.socionext.com) ([172.31.9.52]) by mx.socionext.com with ESMTP; 29 Jun 2018 17:39:02 +0900 Received: from mail.mfilter.local (m-filter-2 [10.213.24.62]) by kinkan-ex.css.socionext.com (Postfix) with ESMTP id C0F841800FC; Fri, 29 Jun 2018 17:39:02 +0900 (JST) Received: from 172.31.9.51 (172.31.9.51) by m-FILTER with ESMTP; Fri, 29 Jun 2018 17:39:02 +0900 Received: from plum.e01.socionext.com (unknown [10.213.132.32]) by kinkan.css.socionext.com (Postfix) with ESMTP id 4C2F01A120E; Fri, 29 Jun 2018 17:39:02 +0900 (JST) From: Kunihiko Hayashi To: Kishon Vijay Abraham I , Rob Herring , Mark Rutland , Masahiro Yamada Subject: [PATCH 4/4] phy: socionext: add USB2 PHY driver for UniPhier SoC Date: Fri, 29 Jun 2018 17:39:01 +0900 Message-Id: <1530261541-23104-5-git-send-email-hayashi.kunihiko@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530261541-23104-1-git-send-email-hayashi.kunihiko@socionext.com> References: <1530261541-23104-1-git-send-email-hayashi.kunihiko@socionext.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180629_013924_148321_1C6C471A X-CRM114-Status: GOOD ( 25.39 ) 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: devicetree@vger.kernel.org, Kunihiko Hayashi , Masami Hiramatsu , linux-kernel@vger.kernel.org, Jassi Brar , 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 Add a driver for PHY interface built into USB2 controller implemented on UniPhier SoCs. This driver supports HS-PHY for Pro4 and LD11. Signed-off-by: Kunihiko Hayashi --- drivers/phy/socionext/Kconfig | 13 ++ drivers/phy/socionext/Makefile | 1 + drivers/phy/socionext/phy-uniphier-usb2.c | 218 ++++++++++++++++++++++++++++++ 3 files changed, 232 insertions(+) create mode 100644 drivers/phy/socionext/phy-uniphier-usb2.c diff --git a/drivers/phy/socionext/Kconfig b/drivers/phy/socionext/Kconfig index 4a172fc..497ca38 100644 --- a/drivers/phy/socionext/Kconfig +++ b/drivers/phy/socionext/Kconfig @@ -2,6 +2,19 @@ # PHY drivers for Socionext platforms. # +config PHY_UNIPHIER_USB2 + tristate "UniPhier USB2 PHY driver" + depends on ARCH_UNIPHIER || COMPILE_TEST + depends on OF && HAS_IOMEM + select GENERIC_PHY + select MFD_SYSCON + help + Enable this to support USB PHY implemented on USB2 controller + on UniPhier SoCs. This driver provides interface to interact + with USB 2.0 PHY that is part of the UniPhier SoC. + In case of Pro4, it is necessary to specify this USB2 PHY instead + of USB3 HS-PHY. + config PHY_UNIPHIER_USB3 tristate "UniPhier USB3 PHY driver" depends on ARCH_UNIPHIER || COMPILE_TEST diff --git a/drivers/phy/socionext/Makefile b/drivers/phy/socionext/Makefile index dfa5cec..6b4763e 100644 --- a/drivers/phy/socionext/Makefile +++ b/drivers/phy/socionext/Makefile @@ -3,4 +3,5 @@ # Makefile for the phy drivers. # +obj-$(CONFIG_PHY_UNIPHIER_USB2) += phy-uniphier-usb2.o obj-$(CONFIG_PHY_UNIPHIER_USB3) += phy-uniphier-usb3hs.o phy-uniphier-usb3ss.o diff --git a/drivers/phy/socionext/phy-uniphier-usb2.c b/drivers/phy/socionext/phy-uniphier-usb2.c new file mode 100644 index 0000000..bab9e38 --- /dev/null +++ b/drivers/phy/socionext/phy-uniphier-usb2.c @@ -0,0 +1,218 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * phy-uniphier-usb2.c - PHY driver for UniPhier USB2 controller + * Copyright 2015-2018 Socionext Inc. + * Author: + * Kunihiko Hayashi + */ + +#include +#include +#include +#include +#include +#include +#include + +#define PHY_PARAMS 2 + +struct uniphier_u2phy_soc_data { + struct { + u32 addr; + u32 val; + } param[PHY_PARAMS]; +}; + +struct uniphier_u2phy_priv { + struct regmap *regmap; + struct phy *phy; + const struct uniphier_u2phy_soc_data *data; + struct uniphier_u2phy_priv *next; +}; + +static int uniphier_u2phy_init(struct phy *phy) +{ + struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); + int i; + + if (!priv->data) + return 0; + + for (i = 0; i < PHY_PARAMS; i++) + regmap_write(priv->regmap, + priv->data->param[i].addr, + priv->data->param[i].val); + + return 0; +} + +static struct phy *uniphier_u2phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct uniphier_u2phy_priv *priv = dev_get_drvdata(dev); + + while (priv && args->np != priv->phy->dev.of_node) + priv = priv->next; + + if (!priv) { + dev_err(dev, "Failed to find appropriate phy\n"); + return ERR_PTR(-EINVAL); + } + + return priv->phy; +} + +static const struct phy_ops uniphier_u2phy_ops = { + .init = uniphier_u2phy_init, + .owner = THIS_MODULE, +}; + +static int uniphier_u2phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *parent, *child; + struct uniphier_u2phy_priv *priv = NULL, *next = NULL; + struct phy_provider *phy_provider; + struct regmap *regmap; + struct phy *phy; + const struct uniphier_u2phy_soc_data *data; + int ret, data_idx, ndatas; + + data = of_device_get_match_data(dev); + if (WARN_ON(!data)) + return -EINVAL; + + /* get number of data */ + for (ndatas = 0; data[ndatas].param[0].addr; ndatas++) + ; + + parent = of_get_parent(dev->of_node); + regmap = syscon_node_to_regmap(parent); + of_node_put(parent); + if (IS_ERR(regmap)) { + dev_err(dev, "Failed to get regmap\n"); + return PTR_ERR(regmap); + } + + for_each_child_of_node(dev->of_node, child) { + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + goto out_put_child; + } + priv->regmap = regmap; + + phy = devm_phy_create(dev, child, &uniphier_u2phy_ops); + if (IS_ERR(phy)) { + dev_err(dev, "Failed to create phy\n"); + ret = PTR_ERR(phy); + goto out_put_child; + } + priv->phy = phy; + + ret = of_property_read_u32(child, "reg", &data_idx); + if (ret) { + dev_err(dev, "Failed to get reg property\n"); + goto out_put_child; + } + + if (data_idx < ndatas) + priv->data = &data[data_idx]; + else + dev_warn(dev, "No phy configuration: %s\n", + child->full_name); + + phy_set_drvdata(phy, priv); + priv->next = next; + next = priv; + } + + dev_set_drvdata(dev, priv); + phy_provider = devm_of_phy_provider_register(dev, + uniphier_u2phy_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + return 0; + +out_put_child: + of_node_put(child); + + return ret; +} + +static const struct uniphier_u2phy_soc_data uniphier_pro4_data[] = { + { + .param = { + { 0x500, 0x05142400 }, + { 0x50c, 0x00010010 }, + }, + }, + { + .param = { + { 0x508, 0x05142400 }, + { 0x50c, 0x00010010 }, + }, + }, + { + .param = { + { 0x510, 0x05142400 }, + { 0x51c, 0x00010010 }, + }, + }, + { + .param = { + { 0x518, 0x05142400 }, + { 0x51c, 0x00010010 }, + }, + }, + { /* sentinel */ } +}; + +static const struct uniphier_u2phy_soc_data uniphier_ld11_data[] = { + { + .param = { + { 0x500, 0x82280000 }, + { 0x504, 0x00000106 }, + }, + }, + { + .param = { + { 0x508, 0x82280000 }, + { 0x50c, 0x00000106 }, + }, + }, + { + .param = { + { 0x510, 0x82280000 }, + { 0x514, 0x00000106 }, + }, + }, + { /* sentinel */ } +}; + +static const struct of_device_id uniphier_u2phy_match[] = { + { + .compatible = "socionext,uniphier-pro4-usb2-phy", + .data = &uniphier_pro4_data, + }, + { + .compatible = "socionext,uniphier-ld11-usb2-phy", + .data = &uniphier_ld11_data, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, uniphier_u2phy_match); + +static struct platform_driver uniphier_u2phy_driver = { + .probe = uniphier_u2phy_probe, + .driver = { + .name = "uniphier-usb2-phy", + .of_match_table = uniphier_u2phy_match, + }, +}; +module_platform_driver(uniphier_u2phy_driver); + +MODULE_AUTHOR("Kunihiko Hayashi "); +MODULE_DESCRIPTION("UniPhier PHY driver for USB2 controller"); +MODULE_LICENSE("GPL v2");