Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753259AbdLDKLB (ORCPT ); Mon, 4 Dec 2017 05:11:01 -0500 Received: from mail-by2nam03on0135.outbound.protection.outlook.com ([104.47.42.135]:46808 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751636AbdLDKK7 (ORCPT ); Mon, 4 Dec 2017 05:10:59 -0500 From: LinuxPatchCommit To: "adrian.hunter@intel.com" , "ulf.hansson@linaro.org" , "linux-mmc@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: LinuxPatchCommit , "Shirley Her (SC)" Subject: [PATCH 3/3] mmc: sdhci: Modify sdhci o2 quirk for eMMC HS200 tuning case Thread-Topic: [PATCH 3/3] mmc: sdhci: Modify sdhci o2 quirk for eMMC HS200 tuning case Thread-Index: AQHTbORmvNpiAnw09UivBfLxv2zeT6My9mng Date: Mon, 4 Dec 2017 10:10:57 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US, zh-CN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=LinuxPatchCommit@bayhubtech.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [27.17.7.178] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR04MB0646;6:RT3ZRh5k9hAvIo8QbZMqU0wiR+qxSbNOM7IUkC4r4hRPDX9OslToUDS4Q9TQHgnUg9oAUxzD0Kt9FFNnSLBmmTPwUNXnoKElmxQnNH97nuSelCZp6GHqQ+Z2VuTiFwLH4BJxRgY3G/MpjdoN0z9fV6JQxfPICe9gKOVHmMIPDnv9hJOZPs5AGWwAgTcBJt3DOWY+ttGXpdKIv8KoH1zOnq4tw2ekGMwj7J++Z+NlWJJmmtaQC5tuYyJprbsxIZ49yWQv0Vx32zxsIL8XLI7GeLXqO3nzqtbXBdtYUncjjuKCX1zEQBRHhQ/vPzly/215XhVDvu75zHdEsi1M9Ec+jd4m73uefxLUasGS7QZlJiY=;5:uw17/wfXzgzAhzalyK/nG4snnkg9cV4zYSPY5JbNAKu+k0rNVqUMpN6zv18baCZAHBQp8Kh+eZfU1bowg4rQwNuErHzLZ5Dh25XEYiHVKwrVB2WVWrM0F6d5R6W5EQpyfYwmViTfkaescZPJnCJZkcV/1tf+Mgd5JgAsQ6RsKDQ=;24:oK6VM26AT6iPbEtCDeMqiSBoEo8B/tyuP2ce4NcOPtdQIuj1mzJrmjKyDSbmtwU/XXFxKnCB4lD45V1y5+89V6Qrvq9mbOae5Xh8qGlSvSg=;7:O8HKqh5hb0DxvMV2NCyXDttnsfbha0NACZauRZLuqFUIw3koPCAyHrwP40eiyRNgSAmFYkgT9bGVUDD8iy7nEigbM3yiQ/POzaKUoru5D/qWWmeZE29BrOh21JVCeRFHGomXjAyKtxfy+UNBBRiMflBG+o9aibHlfsEO/sum6gIlPsL/6yYZSP0xmiMsnJf5Y0E2kFIkiZTZEWsAesYnkaoW+VicJbleLqczLE9Pa/GsZLa2B0fYbeZdjyeq72rk x-ms-exchange-antispam-srfa-diagnostics: SSOS;SSOR; x-forefront-antispam-report: SFV:SKI;SCL:-1;SFV:NSPM;SFS:(10019020)(6009001)(39830400002)(346002)(366004)(376002)(189002)(199003)(7696005)(105586002)(99286004)(54906003)(101416001)(8936002)(106356001)(54356011)(6506006)(77096006)(110136005)(6436002)(97736004)(14454004)(3846002)(316002)(76176011)(102836003)(80792005)(55016002)(6116002)(413944005)(53936002)(5660300001)(7736002)(3660700001)(66066001)(72206003)(2900100001)(2201001)(68736007)(107886003)(478600001)(74316002)(2501003)(2950100002)(8676002)(81156014)(86362001)(3280700002)(2906002)(81166006)(25786009)(33656002)(189998001)(4326008)(305945005)(9686003)(41562002);DIR:OUT;SFP:1102;SCL:1;SRVR:CY4PR04MB0646;H:CY4PR04MB0473.namprd04.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:en; x-ms-office365-filtering-correlation-id: a69e8fef-2bf5-42cf-d480-08d53aff5052 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(4534020)(4602075)(4603075)(4627115)(201702281549075)(5600026)(4604075)(2017052603286);SRVR:CY4PR04MB0646; x-ms-traffictypediagnostic: CY4PR04MB0646: x-ms-exchange-sharedmailbox-routingagent-processed: True x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(6040450)(2401047)(8121501046)(5005006)(93006095)(93001095)(10201501046)(3002001)(3231022)(6041248)(201703131423075)(201702281528075)(201703061421075)(201703061406153)(2016111802025)(20161123555025)(20161123558100)(20161123562025)(20161123560025)(20161123564025)(6043046)(6072148)(201708071742011);SRVR:CY4PR04MB0646;BCL:0;PCL:0;RULEID:(100000803101)(100110400095);SRVR:CY4PR04MB0646; x-forefront-prvs: 051158ECBB spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 X-OriginatorOrg: bayhubtech.com X-MS-Exchange-CrossTenant-Network-Message-Id: a69e8fef-2bf5-42cf-d480-08d53aff5052 X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Dec 2017 10:10:58.0064 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 0a7aae2b-8f2e-44df-ba2f-42de7f93c642 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR04MB0646 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id vB4AB69J029560 Content-Length: 1219 Lines: 27 Dear all, Don't clear transfer mode register in sdhci_set_transfer_mode(). In sdhci_set_transfer_mode(), clear transfer mode quirk2 will clear SD host transfer mode register for non-data commands. This quirk is used for the bug of O2micro/Bayhubtech devices. In eMMC HS200 tuning case, the tuning process uses hardware tuning and it needs to set transfer mode register for tuning command. Signed-off-by: ernest.zhang --- drivers/mmc/host/sdhci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 0d5fcca18c9e..d5b19fc9ea56 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -918,7 +918,9 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host, if (data == NULL) { if (host->quirks2 & SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD) { - sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE); + /* cannot clear transfer mode register when tuning */ + if (cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) + sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE); } else { /* clear Auto CMD settings for no data CMDs */ mode = sdhci_readw(host, SDHCI_TRANSFER_MODE); -- 2.14.1