From patchwork Sun Jan 21 22:24:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 764594 Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2062.outbound.protection.outlook.com [40.107.22.62]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5AF9F39ACD; Sun, 21 Jan 2024 22:25:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.22.62 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705875903; cv=fail; b=JtkJ82/nQ6jiNu58n7kWgG3UEl1X3QxIWmriT4eNgAoae9sGUmp89aD+d4Ud6Ss1RHibZ2pOzurJfYHynyX450jHHdtcPTrxch6k+Z5MkIb5HcBjtG65jx6aKmeGvPohVDbmBjJj/9qbEqGFXPkFEefnoHOFwLQQkXo4HcN2M7o= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705875903; c=relaxed/simple; bh=XVV1gSwV1UV1ScFgRL+jni2ulTpDQ7D9i/nGFyLqyAM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=trTD7TKn+W0rgrs4NYGgxEZbTs06tv0Bb1oyfmNiqq7uhv6w6k3GLerds/npRMtRkmIWDs7B1o+ArH1nV+fc/rvtLDuW20/5Oz74njitlHjvuZwP8p359fcTv+jFTA218ejSIBkgGZhe7ynuRcnl/8DEx6KANoi4d0SXn6VqgGA= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com; spf=pass smtp.mailfrom=nxp.com; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b=m/ISb2s5; arc=fail smtp.client-ip=40.107.22.62 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nxp.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b="m/ISb2s5" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ffz62ZuZTocsviF5YRFG0mNS7R+JfA31xnyYrej4uBbFLJltwfuO6U8NDECsKwbPHQmo1uBQKUpujKTotNitfxltORFEba7g/ZTmVrthemeY1C7uMom1h0Odsh1eEJ9nQIj2JfjMZM063TE0UoGe9B5bBmIE2DY/XJcQ0sIAFtSFwe96HY+6ub6RwE66a0OxsfvzJjtHT2WTalV7ohskhscamuOMGKimLEnT7De8CxDI6oO7jmTPAO4N797CrDgC4qctc0n3IoBahQpo/OVzmTLXgZfi8RI3LOewl+m0uKreGQDe9KgzTCXIkrHWJPy35hU8Nm8T7DrWIuW8wGJM5w== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=6WjEhoaKrfQXQ/3+dXzeqTAvAdn0vYPi9jBmGKxZQCs=; b=iw+SGziU5SikRd5cbV/7XRgM32Y0Nf+ZJh+GYLEp9uFfQstg7k+drqpJLHN12qpgy5BmOV4MlTt7oA31WQCQY0P980U8A2DDSreMRKKl2GJyBpl58syeUEtCahrVtdL71o2gtHkHQAgeHOIr/aWtRSgsD1tniUujUcxEt2+pKThOQI1KvOoEMf7+3gEWF0lF4UdxJTsZSGtotczmFIysZN00X0wacOcY6TC3J2VtFSv6ZrKUlJqeatjV5ya+hiRAlRW4meQPIbhn0Nul+dKvGiB4O1/sG4PC+h/Ofs75FjflYTWHNlTlKfr0xnQZmCsutJGPur8pysyaAA7DKckHnA== 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=6WjEhoaKrfQXQ/3+dXzeqTAvAdn0vYPi9jBmGKxZQCs=; b=m/ISb2s5dSJBbnhwa8TH5813rDd1EM1CoHEQYAkgeF5EjASQUtq/sfApe47UTs3hfQ47BznpiEtG9FXKAq6ymE1NSeQMBFCvTFhFnQmORSCTlq5Z83/srvdZOIAd9YX8Uu20swkq9XzKYU1eNohULpBCwqyJl/GJo7SXnGWdnOQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) by PAXPR04MB9074.eurprd04.prod.outlook.com (2603:10a6:102:227::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7202.31; Sun, 21 Jan 2024 22:24:58 +0000 Received: from PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::c8b4:5648:8948:e85c]) by PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::c8b4:5648:8948:e85c%3]) with mapi id 15.20.7202.031; Sun, 21 Jan 2024 22:24:58 +0000 From: Frank Li To: frank.li@nxp.com, mathias.nyman@intel.com Cc: Thinh.Nguyen@synopsys.com, balbi@kernel.org, devicetree@vger.kernel.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, mark.rutland@arm.com, pku.leo@gmail.com, ran.wang_1@nxp.com, robh+dt@kernel.org, sergei.shtylyov@cogentembedded.com, imx@lists.linux.dev Subject: [PATCH v2 3/3] usb: dwc3: Add workaround for host mode VBUS glitch when boot Date: Sun, 21 Jan 2024 17:24:28 -0500 Message-Id: <20240121222428.3396428-4-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240121222428.3396428-1-Frank.Li@nxp.com> References: <20240121222428.3396428-1-Frank.Li@nxp.com> X-ClientProxiedBy: BY5PR17CA0063.namprd17.prod.outlook.com (2603:10b6:a03:167::40) To PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB9642:EE_|PAXPR04MB9074:EE_ X-MS-Office365-Filtering-Correlation-Id: 4b938549-5803-483e-2b05-08dc1acfcd1c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:PAXPR04MB9642.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230031)(366004)(346002)(136003)(396003)(39860400002)(376002)(230922051799003)(186009)(1800799012)(64100799003)(451199024)(86362001)(8936002)(4326008)(8676002)(316002)(66556008)(66476007)(66946007)(36756003)(5660300002)(6506007)(6486002)(2906002)(41300700001)(52116002)(7416002)(38100700002)(38350700005)(83380400001)(26005)(1076003)(2616005)(6512007)(6666004)(478600001); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4b938549-5803-483e-2b05-08dc1acfcd1c X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB9642.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jan 2024 22:24:58.5101 (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: fm87IuUU8ol6+LQ0hAKigFNrqdS3XJVu1OzJo/uBpB8sHeknB9PqoQoqFPFZfq9LvC22e6AzP/Rcjw4H4XkqYw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB9074 From: Ran Wang When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS (or its control signal) will be turned on immediately on related Root Hub ports. Then, the VBUS is turned off for a little while(15us) when do xhci reset (conducted by xhci driver) and back to normal finally, we can observe a negative glitch of related signal happen. This VBUS glitch might cause some USB devices enumeration fail if kernel boot with them connected. Such as LS1012AFWRY/LS1043ARDB/LX2160AQDS /LS1088ARDB with Kingston 16GB USB2.0/Kingston USB3.0/JetFlash Transcend 4GB USB2.0 drives. The fail cases include enumerated as full-speed device or report wrong device descriptor, etc. One SW workaround which can fix this is by programing all xhci PORTSC[PP] to 0 to turn off VBUS immediately after setting host mode in DWC3 driver (per signal measurement result, it will be too late to do it in xhci-plat.c or xhci.c). Then, after xhci reset complete in xhci driver, PORTSC[PP]s' value will back to 1 automatically and VBUS on at that time, no glitch happen and normal enumeration process has no impact. Signed-off-by: Ran Wang Reviewed-by: Peter Chen Signed-off-by: Frank Li --- drivers/usb/dwc3/core.c | 3 +++ drivers/usb/dwc3/core.h | 2 ++ drivers/usb/dwc3/host.c | 48 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 53 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 3e55838c00014..3b68e8e45b8b9 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1626,6 +1626,9 @@ static void dwc3_get_properties(struct dwc3 *dwc) dwc->dis_split_quirk = device_property_read_bool(dev, "snps,dis-split-quirk"); + dwc->host_vbus_glitches_quirk = device_property_read_bool(dev, + "snps,host-vbus-glitches-quirk"); + dwc->lpm_nyet_threshold = lpm_nyet_threshold; dwc->tx_de_emphasis = tx_de_emphasis; diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index e3eea965e57bf..df544ec730d22 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1132,6 +1132,7 @@ struct dwc3_scratchpad_array { * 2 - No de-emphasis * 3 - Reserved * @dis_metastability_quirk: set to disable metastability quirk. + * @host_vbus_glitches_quirk: set to avoid vbus glitch during xhci reset. * @dis_split_quirk: set to disable split boundary. * @wakeup_configured: set if the device is configured for remote wakeup. * @suspended: set to track suspend event due to U3/L2. @@ -1353,6 +1354,7 @@ struct dwc3 { unsigned tx_de_emphasis:2; unsigned dis_metastability_quirk:1; + unsigned host_vbus_glitches_quirk:1; unsigned dis_split_quirk:1; unsigned async_callbacks:1; diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index 61f57fe5bb783..ee1ffe1500560 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -11,6 +11,9 @@ #include #include +#include "../host/xhci-port.h" +#include "../host/xhci-ext-caps.h" +#include "../host/xhci-caps.h" #include "core.h" static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, @@ -28,6 +31,44 @@ static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, dwc->xhci_resources[1].name = name; } +#define XHCI_HCSPARAMS1 0x4 +#define XHCI_PORTSC_BASE 0x400 + +/* + * dwc3_power_off_all_roothub_ports - Power off all Root hub ports + * @dwc3: Pointer to our controller context structure + */ +static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc) +{ + int i, port_num; + u32 reg, op_regs_base, offset; + void __iomem *xhci_regs; + + /* xhci regs is not mapped yet, do it temperary here */ + if (dwc->xhci_resources[0].start) { + xhci_regs = ioremap(dwc->xhci_resources[0].start, DWC3_XHCI_REGS_END); + if (IS_ERR(xhci_regs)) { + dev_err(dwc->dev, "Failed to ioremap xhci_regs\n"); + return; + } + + op_regs_base = HC_LENGTH(readl(xhci_regs)); + reg = readl(xhci_regs + XHCI_HCSPARAMS1); + port_num = HCS_MAX_PORTS(reg); + + for (i = 1; i <= port_num; i++) { + offset = op_regs_base + XHCI_PORTSC_BASE + 0x10 * (i - 1); + reg = readl(xhci_regs + offset); + reg &= ~PORT_POWER; + writel(reg, xhci_regs + offset); + } + + iounmap(xhci_regs); + } else { + dev_err(dwc->dev, "xhci base reg invalid\n"); + } +} + static int dwc3_host_get_irq(struct dwc3 *dwc) { struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); @@ -66,6 +107,13 @@ int dwc3_host_init(struct dwc3 *dwc) int ret, irq; int prop_idx = 0; + /* + * We have to power off all Root hub ports immediately after DWC3 set + * to host mode to avoid VBUS glitch happen when xhci get reset later. + */ + if (dwc->host_vbus_glitches_quirk) + dwc3_power_off_all_roothub_ports(dwc); + irq = dwc3_host_get_irq(dwc); if (irq < 0) return irq;