From patchwork Wed Dec 21 11:28:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bough Chen X-Patchwork-Id: 636529 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 74073C10F1B for ; Wed, 21 Dec 2022 11:28:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229491AbiLUL25 (ORCPT ); Wed, 21 Dec 2022 06:28:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234537AbiLUL2z (ORCPT ); Wed, 21 Dec 2022 06:28:55 -0500 Received: from EUR01-DB5-obe.outbound.protection.outlook.com (mail-db5eur01on2055.outbound.protection.outlook.com [40.107.15.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AD7C42315C for ; Wed, 21 Dec 2022 03:28:52 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=B8jVsa4ason55HmA6Nj5yGTfyeFgpfgYLK5cafefW80mbfkt1Qgx4Enh2XDgsIQFjQ5G9hkYHO+3y38eOUC71S+9I9JUoB4b+FO1sIQZZwYVelFNtpwoDl5HRXzfUCRfjimrc4fPTD7JcDTl9CVycoQXjm80B7lpjZk4zXBjfQHHB6BwNr0qEDq3OzGLL/ovJQxjEpycCaGYpa6pWzMYU+HzqSq+IR51YnL+ARNUQNEggoYxv1jN7+i3Voo/1C51qpKvH1JWSTOLIC4CgvLu0IFBoscv7Iqer3Sc8m+pCUoj7PdHZ9RWL486f8Q6fxL4xTdfeLVrbxonag3r6O/EWw== 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=f8uRlppJfmpn0m29G7TvPlOTMdCnlTuaGNK/V/1nB7M=; b=an3gOMJgQ5CwftD/mZAHBm7scyPWSPiW5wkFxwheGNBLGs8RF2RqV44fnTVQ/LfWtRN1MBXW1Tf2fsXStyKjXCo0Xmxr1JFn8xQz2Zzrq+hsO9l2sWirf5ZLw2Ae8cTUxe1dKiC7PUekgiaPFLIG3E01rm2pAv9gQYbrI2V3CpSiyWyh+7WWukLWpC85GV95qrWQimGvwFz0uROGveZmRiVCESwU0ih7i/hjty6sgiBEP3zDyq4iwM351oWC+KhiRw50W9GdmH1ip1fO679OoZ0lbpFBWfdi2gOewvlQqFXbPRRS0riqifJhZkrRcnnUDDDJT2hFL2znwbmPAMH5zA== 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=f8uRlppJfmpn0m29G7TvPlOTMdCnlTuaGNK/V/1nB7M=; b=GV2mkIh7CY7FUo7oJl/h17ze31X7FVn+JCmnPg1jSUZhsI3XjeZddqKAjjyMMr+sXUo5MxpFrmcM8xNKqId1KWHs52xMbuqs6W38FBdN7YSaKaNVhV6HqZVfRmejSVVSgmRfGqhCVqc1wWEpj19bvEznAZ14XNHWj59+uVvngy4= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from DB7PR04MB4010.eurprd04.prod.outlook.com (2603:10a6:5:21::30) by PAXPR04MB8575.eurprd04.prod.outlook.com (2603:10a6:102:216::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5924.16; Wed, 21 Dec 2022 11:28:51 +0000 Received: from DB7PR04MB4010.eurprd04.prod.outlook.com ([fe80::7479:76ef:8e5:da0b]) by DB7PR04MB4010.eurprd04.prod.outlook.com ([fe80::7479:76ef:8e5:da0b%6]) with mapi id 15.20.5924.016; Wed, 21 Dec 2022 11:28:51 +0000 From: haibo.chen@nxp.com To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-mmc@vger.kernel.org, kgroeneveld@lenbrook.com, haibo.chen@nxp.com Subject: [PATCH v2 1/3] mmc: sdhci-esdhc-imx: simplify the auto tuning logic Date: Wed, 21 Dec 2022 19:28:51 +0800 Message-Id: <20221221112853.789675-2-haibo.chen@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221221112853.789675-1-haibo.chen@nxp.com> References: <20221221112853.789675-1-haibo.chen@nxp.com> X-ClientProxiedBy: SG2PR06CA0227.apcprd06.prod.outlook.com (2603:1096:4:68::35) To DB7PR04MB4010.eurprd04.prod.outlook.com (2603:10a6:5:21::30) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB7PR04MB4010:EE_|PAXPR04MB8575:EE_ X-MS-Office365-Filtering-Correlation-Id: 9ff57bae-7b6f-4745-2c00-08dae3468906 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:DB7PR04MB4010.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230022)(4636009)(136003)(39860400002)(376002)(366004)(396003)(346002)(451199015)(6506007)(52116002)(2906002)(6486002)(478600001)(26005)(2616005)(66476007)(36756003)(66556008)(66946007)(4326008)(41300700001)(8676002)(1076003)(316002)(6512007)(9686003)(8936002)(186003)(5660300002)(83380400001)(38350700002)(86362001)(38100700002); 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: 9ff57bae-7b6f-4745-2c00-08dae3468906 X-MS-Exchange-CrossTenant-AuthSource: DB7PR04MB4010.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Dec 2022 11:28:51.5257 (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: xi1CcesZveAmO41W599Ur2gAAFs/uJiYbxIMWSWUKhtKyEqKYp6eX6NOfokIKGOP7Ou1cXNiQ9BGQwc8J9HhGw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB8575 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Haibo Chen Clear auto tuning bit when reset tuning, and enable auto tuning only after tuning done successfully for both standard tuning and manual tuning. Signed-off-by: Haibo Chen --- drivers/mmc/host/sdhci-esdhc-imx.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 89ef0c80ac37..bf8d6f60a9ee 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -429,9 +429,10 @@ static inline void esdhc_wait_for_card_clock_gate_off(struct sdhci_host *host) } /* Enable the auto tuning circuit to check the CMD line and BUS line */ -static inline void usdhc_auto_tuning_mode_sel(struct sdhci_host *host) +static inline void usdhc_auto_tuning_mode_sel_and_en(struct sdhci_host *host) { u32 buswidth, auto_tune_buswidth; + u32 reg; buswidth = USDHC_GET_BUSWIDTH(readl(host->ioaddr + SDHCI_HOST_CONTROL)); @@ -450,6 +451,10 @@ static inline void usdhc_auto_tuning_mode_sel(struct sdhci_host *host) esdhc_clrset_le(host, ESDHC_VEND_SPEC2_AUTO_TUNE_MODE_MASK, auto_tune_buswidth | ESDHC_VEND_SPEC2_AUTO_TUNE_CMD_EN, ESDHC_VEND_SPEC2); + + reg = readl(host->ioaddr + ESDHC_MIX_CTRL); + reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; + writel(reg, host->ioaddr + ESDHC_MIX_CTRL); } static u32 esdhc_readl_le(struct sdhci_host *host, int reg) @@ -681,14 +686,11 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg) } else { v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; m &= ~ESDHC_MIX_CTRL_FBCLK_SEL; - m &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN; } if (val & SDHCI_CTRL_EXEC_TUNING) { v |= ESDHC_MIX_CTRL_EXE_TUNE; m |= ESDHC_MIX_CTRL_FBCLK_SEL; - m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; - usdhc_auto_tuning_mode_sel(host); } else { v &= ~ESDHC_MIX_CTRL_EXE_TUNE; } @@ -1022,13 +1024,15 @@ static void esdhc_reset_tuning(struct sdhci_host *host) /* Reset the tuning circuit */ if (esdhc_is_usdhc(imx_data)) { + ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL); + ctrl &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN; if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) { - ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL); ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL; writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL); writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS); } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) { + writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL); ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS); ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; ctrl &= ~ESDHC_MIX_CTRL_EXE_TUNE; @@ -1054,6 +1058,7 @@ static void esdhc_reset_tuning(struct sdhci_host *host) static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct sdhci_host *host = mmc_priv(mmc); + int err; /* * i.MX uSDHC internally already uses a fixed optimized timing for @@ -1068,7 +1073,12 @@ static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode) * correct delay cell. */ esdhc_reset_tuning(host); - return sdhci_execute_tuning(mmc, opcode); + err = sdhci_execute_tuning(mmc, opcode); + /* If tuning done, enable auto tuning */ + if (!err && !host->tuning_err) + usdhc_auto_tuning_mode_sel_and_en(host); + + return err; } static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val) @@ -1102,11 +1112,8 @@ static void esdhc_post_tuning(struct sdhci_host *host) { u32 reg; - usdhc_auto_tuning_mode_sel(host); - reg = readl(host->ioaddr + ESDHC_MIX_CTRL); reg &= ~ESDHC_MIX_CTRL_EXE_TUNE; - reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; writel(reg, host->ioaddr + ESDHC_MIX_CTRL); }