From patchwork Fri May 22 10:32:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Chen X-Patchwork-Id: 11565327 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 53E94739 for ; Fri, 22 May 2020 10:33:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32F98207CB for ; Fri, 22 May 2020 10:33:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b="YGIhGcyb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728827AbgEVKdB (ORCPT ); Fri, 22 May 2020 06:33:01 -0400 Received: from mail-eopbgr50047.outbound.protection.outlook.com ([40.107.5.47]:48672 "EHLO EUR03-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728362AbgEVKc4 (ORCPT ); Fri, 22 May 2020 06:32:56 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=A186eaDyHD+8ekvVHFqdtlBEge+K6dhPQS5rH7bG1nDxkiYnbXj/KU/eeVJ3FHCXv5OtoeztSzzqM5yyarMl7j5wUbZ2oG50Ja+GnT2kaKsW6pdX76I1q9rGjODe9+1KklagMYSYgpBNK8UuiREDz8jJbSfhZJ+o7X4ZnHbsXiuWvquXBiWSTMQHxk/1+XHhjPTTsO0Z3mERlmgKcP9R7MVcjgQQmC1xylyDzf0tXpdWECuM8oGwQEEb3rZStU6LuaT5vGSnUD9Uw6FEOxlNe/hIWCUmpY8AvDk9G5f2DhR1N7wdcu6hRjk/jTdNR2gOtfWCh5oLupWV68NgVf8auA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=uT+DKnQMSqid1P7HUGXEc7h60iy9sSbHaOr2UlWRZOo=; b=dpenxm73pZx1R9KzfmPsH4K6vFnS088jPvXpxpbukkM4f7PPo8dhP1P7flKWB7JW+ubmkoka7SC5Vcm0kZM0sby9r2b36oAJ5nXZiRcw0shWdClfKltydTFmVj6nrnhQ81rU+C/wEiLMJIcJfdgW6iTBBuq7H9FuQVcUz2AgqsI/8CkbieHd6ohXJGNO0QVGHWMmIcdxSNsEp2WclJm+CSEWhUtpUKE2r0/k/wWS+xPHBUy8AtIj3hdKgYWGqSINLGC653ytQZ1/ikAc3H9+fSypRaR3jJaF/kOIfogwfflnFG3DFVJ37SEl8tK16Zy96SPJ0mmTAw6qZGlHobuJwQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=uT+DKnQMSqid1P7HUGXEc7h60iy9sSbHaOr2UlWRZOo=; b=YGIhGcybpqxw+7IJ5Q+rbv2R2YMJA2ertuo0LIBiIPqHAOu/apUPYAIcRyy4pTpBsyZhNUgkaU+lpJRay/Btg99xH79Z3Z2EDidtlGbn21bVrdzXQPWJNAiXEr1I9ADyZTSQH0bZhY3ZsHwJrx8MHpaBnWqcPZ+M8ElPJMOx3uE= Authentication-Results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=nxp.com; Received: from AM7PR04MB7157.eurprd04.prod.outlook.com (2603:10a6:20b:118::20) by AM7PR04MB7111.eurprd04.prod.outlook.com (2603:10a6:20b:118::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3021.24; Fri, 22 May 2020 10:32:51 +0000 Received: from AM7PR04MB7157.eurprd04.prod.outlook.com ([fe80::1101:adaa:ee89:af2a]) by AM7PR04MB7157.eurprd04.prod.outlook.com ([fe80::1101:adaa:ee89:af2a%3]) with mapi id 15.20.3021.026; Fri, 22 May 2020 10:32:51 +0000 From: Peter Chen To: balbi@kernel.org, mathias.nyman@intel.com Cc: linux-usb@vger.kernel.org, linux-imx@nxp.com, pawell@cadence.com, rogerq@ti.com, gregkh@linuxfoundation.org, jun.li@nxp.com, Peter Chen Subject: [PATCH 2/8] usb: cdns3: imx: add glue layer runtime pm implementation Date: Fri, 22 May 2020 18:32:50 +0800 Message-Id: <20200522103256.16322-3-peter.chen@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200522103256.16322-1-peter.chen@nxp.com> References: <20200522103256.16322-1-peter.chen@nxp.com> X-ClientProxiedBy: SG2PR0601CA0019.apcprd06.prod.outlook.com (2603:1096:3::29) To AM7PR04MB7157.eurprd04.prod.outlook.com (2603:10a6:20b:118::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from b29397-desktop.ap.freescale.net (119.31.174.66) by SG2PR0601CA0019.apcprd06.prod.outlook.com (2603:1096:3::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3021.23 via Frontend Transport; Fri, 22 May 2020 10:32:48 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [119.31.174.66] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 401718c4-8ed8-477e-be0d-08d7fe3b7a80 X-MS-TrafficTypeDiagnostic: AM7PR04MB7111: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5236; X-Forefront-PRVS: 04111BAC64 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: Juvtkru1oDPPQ9Pb64z43GEAqkdX4JTRAchhJBBKW6jYUvYsq3uwHAhToUb+udXESyBq8+eN36GUxAoyFvIiCkkgTbWKHjP+CwSpcJXgde9sDViEf6QLsKLZYjoQc2wpGAWxuFkpniXntdZMUXX8L/hpcMkedvdPjlQ8eiRUDUVk51HWPfY47wxnxokjUNGuQO4Y+SiUM4kyxFVRbB86jgGMCnMhCgX6k26y5C1xVUETTo/b8V3FelaMpmdMzTQqCY9THam8iGbINguaxssLbMJm4Ney+GdYb6iB0oKmxV8X3DukJpziTCHshe+bNdzgKsvqogqgjSd/CaIXq31bmQ== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM7PR04MB7157.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(366004)(346002)(136003)(376002)(396003)(39860400002)(8676002)(6506007)(1076003)(6666004)(52116002)(26005)(6512007)(5660300002)(16526019)(86362001)(8936002)(66476007)(66556008)(36756003)(66946007)(186003)(6486002)(2616005)(44832011)(2906002)(478600001)(956004)(316002)(4326008);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: +OdrBreLnafzq6Gh4Zbhn7w4p5+k4Vqd4GZcvda8OP3QPMVRgxwiXFzD+iyo8vw+RUD8V5451DDR3W+MeBHYp99LNoM2/9F4WnTpkCSdIwi+q5C5OT/CdiCz/QqB07qWi5zxIqbSr++eHVXFhDC5ckZEYS/3aL1yHIntEhxp9HCo6JUxrIAQWXzpeSzGEwW27Ve/o+HZHALn+SK81GB69Epuke9tRAKsLHc4h8EKg18KH1/Xyjt4fDwP4ejdgXQ56fe2bkQRIgxYelfiEyFiQ5vXjthZA8nJhNAlIl6VP2aQqCFzeBTQTDjw1PoDLA430aWLztNFEIKJaE2RyzoYVOU1+w7CSeGdFSniUC+5BxRzZTesmHpsoQtXGGAPqFLrY6ewvYsj8ZUi+7HSq7YxN1dR/3gdUZOvPZEwYHh+BUgDkGAAOYefSOJqesizoGS0VnhYwYJQWCtzf7L5fuaZuTE1GtrUVzuEqQQwSdeWP3c= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 401718c4-8ed8-477e-be0d-08d7fe3b7a80 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 May 2020 10:32:51.0466 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 0b8Xq7QPwtCiBkpDBOkrrKJ1bDDDdqJ2VZUv7uDMwGAY6UIw3D1IcEYxiP99em2XpqxZxHfEfbZfXRVggpNrwQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR04MB7111 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add imx glue layer runtime pm implementation, and the runtime pm is default off. Signed-off-by: Peter Chen --- drivers/usb/cdns3/cdns3-imx.c | 179 +++++++++++++++++++++++++++++++++- 1 file changed, 177 insertions(+), 2 deletions(-) diff --git a/drivers/usb/cdns3/cdns3-imx.c b/drivers/usb/cdns3/cdns3-imx.c index aba988e71958..9d247de8e7eb 100644 --- a/drivers/usb/cdns3/cdns3-imx.c +++ b/drivers/usb/cdns3/cdns3-imx.c @@ -15,6 +15,8 @@ #include #include #include +#include +#include "core.h" #define USB3_CORE_CTRL1 0x00 #define USB3_CORE_CTRL2 0x04 @@ -66,11 +68,30 @@ #define CLK_VALID_COMPARE_BITS (0xf << 28) #define PHY_REFCLK_REQ (1 << 0) +/* OTG registers definition */ +#define OTGSTS 0x4 +/* OTGSTS */ +#define OTG_NRDY (1 << 11) + +/* xHCI registers definition */ +#define XECP_PM_PMCSR 0x8018 +#define XECP_AUX_CTRL_REG1 0x8120 + +/* Register bits definition */ +/* XECP_AUX_CTRL_REG1 */ +#define CFG_RXDET_P3_EN (1 << 15) + +/* XECP_PM_PMCSR */ +#define PS_MASK (3 << 0) +#define PS_D0 0 +#define PS_D1 (1 << 0) + struct cdns_imx { struct device *dev; void __iomem *noncore; struct clk_bulk_data *clks; int num_clks; + struct platform_device *cdns3_pdev; }; static inline u32 cdns_imx_readl(struct cdns_imx *data, u32 offset) @@ -126,6 +147,20 @@ static int cdns_imx_noncore_init(struct cdns_imx *data) return ret; } +static int cdns_imx_platform_suspend(struct device *dev, + bool suspend, bool wakeup); +static struct cdns3_platform_data cdns_imx_pdata = { + .platform_suspend = cdns_imx_platform_suspend, +}; + +static struct of_dev_auxdata cdns_imx_auxdata[] = { + { + .compatible = "cdns,usb3", + .platform_data = &cdns_imx_pdata, + }, + {}, +}; + static int cdns_imx_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -162,14 +197,18 @@ static int cdns_imx_probe(struct platform_device *pdev) if (ret) goto err; - ret = of_platform_populate(node, NULL, NULL, dev); + ret = of_platform_populate(node, NULL, cdns_imx_auxdata, dev); if (ret) { dev_err(dev, "failed to create children: %d\n", ret); goto err; } - return ret; + device_set_wakeup_capable(dev, true); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_forbid(dev); + return ret; err: clk_bulk_disable_unprepare(data->num_clks, data->clks); return ret; @@ -194,6 +233,141 @@ static int cdns_imx_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static void cdns3_set_wakeup(struct cdns_imx *data, bool enable) +{ + u32 value; + + value = cdns_imx_readl(data, USB3_INT_REG); + if (enable) + value |= OTG_WAKEUP_EN | DEVU3_WAEKUP_EN; + else + value &= ~(OTG_WAKEUP_EN | DEVU3_WAEKUP_EN); + + cdns_imx_writel(data, USB3_INT_REG, value); +} + +static int cdns_imx_platform_suspend(struct device *dev, + bool suspend, bool wakeup) +{ + struct cdns3 *cdns = dev_get_drvdata(dev); + struct device *parent = dev->parent; + struct cdns_imx *data = dev_get_drvdata(parent); + void __iomem *otg_regs = cdns->otg_regs; + void __iomem *xhci_regs = cdns->xhci_regs; + u32 value; + int ret = 0; + + if (cdns->role != USB_ROLE_HOST) + return 0; + + if (suspend) { + /* SW request low power when all usb ports allow to it ??? */ + value = readl(xhci_regs + XECP_PM_PMCSR); + value &= ~PS_MASK; + value |= PS_D1; + writel(value, xhci_regs + XECP_PM_PMCSR); + + /* mdctrl_clk_sel */ + value = cdns_imx_readl(data, USB3_CORE_CTRL1); + value |= MDCTRL_CLK_SEL; + cdns_imx_writel(data, USB3_CORE_CTRL1, value); + + /* wait for mdctrl_clk_status */ + value = cdns_imx_readl(data, USB3_CORE_STATUS); + ret = readl_poll_timeout_atomic(data->noncore + USB3_CORE_STATUS, value, + (value & MDCTRL_CLK_STATUS) == MDCTRL_CLK_STATUS, + 10, 100000); + if (ret) + dev_warn(parent, "wait mdctrl_clk_status timeout\n"); + + /* wait lpm_clk_req to be 0 */ + value = cdns_imx_readl(data, USB3_INT_REG); + ret = readl_poll_timeout_atomic(data->noncore + USB3_INT_REG, value, + (value & LPM_CLK_REQ) != LPM_CLK_REQ, + 10, 100000); + if (ret) + dev_warn(parent, "wait lpm_clk_req timeout\n"); + + /* wait phy_refclk_req to be 0 */ + value = cdns_imx_readl(data, USB3_SSPHY_STATUS); + ret = readl_poll_timeout_atomic(data->noncore + USB3_SSPHY_STATUS, value, + (value & PHY_REFCLK_REQ) != PHY_REFCLK_REQ, + 10, 100000); + if (ret) + dev_warn(parent, "wait phy_refclk_req timeout\n"); + + cdns3_set_wakeup(data, wakeup); + } else { + /* wait CLK_125_REQ to be 1 */ + value = cdns_imx_readl(data, USB3_INT_REG); + ret = readl_poll_timeout_atomic(data->noncore + USB3_INT_REG, value, + (value & CLK_125_REQ) != CLK_125_REQ, + 10, 100000); + if (ret) + dev_warn(parent, "wait CLK_125_REQ timeout\n"); + + cdns3_set_wakeup(data, false); + + /* SW request D0 */ + value = readl(xhci_regs + XECP_PM_PMCSR); + value &= ~PS_MASK; + value |= PS_D0; + writel(value, xhci_regs + XECP_PM_PMCSR); + + /* clr CFG_RXDET_P3_EN */ + value = readl(xhci_regs + XECP_AUX_CTRL_REG1); + value &= ~CFG_RXDET_P3_EN; + writel(value, xhci_regs + XECP_AUX_CTRL_REG1); + + /* clear mdctrl_clk_sel */ + value = cdns_imx_readl(data, USB3_CORE_CTRL1); + value &= ~MDCTRL_CLK_SEL; + cdns_imx_writel(data, USB3_CORE_CTRL1, value); + + /* wait for mdctrl_clk_status is cleared */ + value = cdns_imx_readl(data, USB3_CORE_STATUS); + ret = readl_poll_timeout_atomic(data->noncore + USB3_CORE_STATUS, value, + (value & MDCTRL_CLK_STATUS) != MDCTRL_CLK_STATUS, + 10, 100000); + if (ret) + dev_warn(parent, "wait mdctrl_clk_status cleared timeout\n"); + + /* Wait until OTG_NRDY is 0 */ + value = readl(otg_regs + OTGSTS); + ret = readl_poll_timeout_atomic(otg_regs + OTGSTS, value, + (value & OTG_NRDY) != OTG_NRDY, + 10, 100000); + if (ret) + dev_warn(parent, "wait OTG ready timeout\n"); + } + + return ret; + +} + +static int cdns_imx_resume(struct device *dev) +{ + struct cdns_imx *data = dev_get_drvdata(dev); + + return clk_bulk_prepare_enable(data->num_clks, data->clks); +} + +static int cdns_imx_suspend(struct device *dev) +{ + struct cdns_imx *data = dev_get_drvdata(dev); + + clk_bulk_disable_unprepare(data->num_clks, data->clks); + + return 0; +} + +#endif /* CONFIG_PM */ + +static const struct dev_pm_ops cdns_imx_pm_ops = { + SET_RUNTIME_PM_OPS(cdns_imx_suspend, cdns_imx_resume, NULL) +}; + static const struct of_device_id cdns_imx_of_match[] = { { .compatible = "fsl,imx8qm-usb3", }, {}, @@ -206,6 +380,7 @@ static struct platform_driver cdns_imx_driver = { .driver = { .name = "cdns3-imx", .of_match_table = cdns_imx_of_match, + .pm = &cdns_imx_pm_ops, }, }; module_platform_driver(cdns_imx_driver);