From patchwork Thu Jan 19 03:51:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brad Larson X-Patchwork-Id: 644566 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6452C00A5A for ; Thu, 19 Jan 2023 04:09:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229967AbjASEIK (ORCPT ); Wed, 18 Jan 2023 23:08:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230108AbjASD5E (ORCPT ); Wed, 18 Jan 2023 22:57:04 -0500 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2070.outbound.protection.outlook.com [40.107.94.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0942342DF4; Wed, 18 Jan 2023 19:55:13 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=cS5xJPFr4sj7fckYqmE3UuOkepwvLD199hS/TcRnZttKImTeviz97LNmwB0fJg6PgTkKGBJ9Nqm2wUp7c661sLnou8QUSroS7n1fmvpC5Ax2kSI6Dte7l5QaAY+KP1b+23WGR6VoI7UZfe6g6uLDMULfT2h+OydPW+YCrYITID5q1PfkVj/pl4fgkclApK5Du4lTU8ZPpZY7gqc7MeUNypfV0RgVhTFwNAXBihET3xob90wztQeHMRLmk52xDeRKjBXXWRTXHQnErUFZtBZziXbPcsHhTAwZFtgmklun+c3uBAysoL2nvBVDa0GgixZceD6/6ZltVbUhoivs5LXSmg== 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=ASmDPbaFuzX/ldCl1/F7wg3DR9HkEcxMnn+qoW/V/nU=; b=TANxwT2kZR+7gnyoCnlp/+mKidWGykKZPwsAkDQdCuJoMAUq2+ENhHzaf7bkPDvhwLWqDzzmBO9Gza+LCUe1iwRKks8+AhIoJM86MwQL/ipjjGwseaowuZhMqMzd1EsBs4ntgl150kncSCC9wzn8CPSiyl8erEi2eRHsP7Dl5NLWzYM9Wm/pTOam3i/qhAm+4eyanX2RrPg9jC5hJyCZOnJ51KZ48ChahcPFpSbMVScwSjbAG6XVfWyb9tSxtapyYVVY9RcYm4hJXGQnEUq/Kd1im5qnGJHjNyHh+XPYXurMj7As3ktiFcNYzEsRERG/SCwDoD4rvY5LcvX7nQ+Flw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=lists.infradead.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ASmDPbaFuzX/ldCl1/F7wg3DR9HkEcxMnn+qoW/V/nU=; b=P+yraJD0/6RWzXFRJiTgcx/3olvanii85tHSDA/tcf3+Jrb2UmsHwnFDomAOU2SUsrIAOtdDGB+I+BdrJNbZV/XkzEOqIEwgHPtHuwmn7B4aWu5OttuBCqG0RNMabVcxglHMpnDXKV7u7wEmMKw+0qx8e40MrP7pOm6m+3Vfj+U= Received: from MW4P220CA0003.NAMP220.PROD.OUTLOOK.COM (2603:10b6:303:115::8) by CY8PR12MB7634.namprd12.prod.outlook.com (2603:10b6:930:9d::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.24; Thu, 19 Jan 2023 03:53:03 +0000 Received: from CO1NAM11FT042.eop-nam11.prod.protection.outlook.com (2603:10b6:303:115:cafe::8) by MW4P220CA0003.outlook.office365.com (2603:10b6:303:115::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6002.25 via Frontend Transport; Thu, 19 Jan 2023 03:53:03 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CO1NAM11FT042.mail.protection.outlook.com (10.13.174.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6023.16 via Frontend Transport; Thu, 19 Jan 2023 03:53:03 +0000 Received: from platform-dev1.pensando.io (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Wed, 18 Jan 2023 21:52:59 -0600 From: Brad Larson To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v9 14/15] mmc: sdhci-cadence: Support mmc hardware reset Date: Wed, 18 Jan 2023 19:51:35 -0800 Message-ID: <20230119035136.21603-15-blarson@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230119035136.21603-1-blarson@amd.com> References: <20230119035136.21603-1-blarson@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT042:EE_|CY8PR12MB7634:EE_ X-MS-Office365-Filtering-Correlation-Id: 32efbb21-267e-4d7a-37b6-08daf9d0aa75 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:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230022)(4636009)(396003)(136003)(346002)(39860400002)(376002)(451199015)(36840700001)(40470700004)(46966006)(36756003)(40480700001)(54906003)(186003)(316002)(40460700003)(6666004)(478600001)(36860700001)(5660300002)(7406005)(7416002)(2906002)(8676002)(70206006)(4326008)(8936002)(6916009)(41300700001)(70586007)(356005)(82740400003)(82310400005)(81166007)(336012)(2616005)(1076003)(26005)(16526019)(83380400001)(426003)(47076005)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Jan 2023 03:53:03.3106 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 32efbb21-267e-4d7a-37b6-08daf9d0aa75 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT042.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7634 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add support for mmc hardware reset using a reset-controller that would need to be enabled in the device tree with a supporting driver. The default is disabled for all existing designs. Signed-off-by: Brad Larson --- Changes since v6: - Previously patch 17/17 - Changed delay after reset_control_assert() from 9 to 3 usec - Renamed sdhci_mmc_hw_reset() to sdhci_cdns_mmc_hw_reset() --- drivers/mmc/host/sdhci-cadence.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index e92aa79a8be2..62321cef41db 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -12,6 +12,7 @@ #include #include #include +#include #include "sdhci-pltfm.h" @@ -70,6 +71,7 @@ struct sdhci_cdns_priv { spinlock_t wrlock; /* write lock */ bool enhanced_strobe; void (*priv_writel)(struct sdhci_cdns_priv *priv, u32 val, void __iomem *reg); + struct reset_control *rst_hw; unsigned int nr_phy_params; struct sdhci_cdns_phy_param phy_params[]; }; @@ -458,6 +460,24 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, SDHCI_CDNS_HRS06_MODE_MMC_HS400); } +extern unsigned int sdhci_timeout_val; + +static void sdhci_cdns_mmc_hw_reset(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); + + dev_dbg(mmc_dev(host->mmc), "emmc hardware reset\n"); + + reset_control_assert(priv->rst_hw); + /* For eMMC, minimum is 1us but give it 3us for good measure */ + udelay(3); + + reset_control_deassert(priv->rst_hw); + /* For eMMC, minimum is 200us but give it 300us for good measure */ + usleep_range(300, 1000); +} + static int sdhci_cdns_probe(struct platform_device *pdev) { struct sdhci_host *host; @@ -521,6 +541,17 @@ static int sdhci_cdns_probe(struct platform_device *pdev) if (ret) goto free; + if (host->mmc->caps & MMC_CAP_HW_RESET) { + priv->rst_hw = devm_reset_control_get_optional_exclusive(dev, "hw"); + if (IS_ERR(priv->rst_hw)) { + ret = PTR_ERR(priv->rst_hw); + if (ret == -ENOENT) + priv->rst_hw = NULL; + } else { + host->mmc_host_ops.card_hw_reset = sdhci_cdns_mmc_hw_reset; + } + } + ret = sdhci_add_host(host); if (ret) goto free;