From patchwork Wed Sep 3 12:04:59 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aisheng Dong X-Patchwork-Id: 4833861 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 94B579F38D for ; Wed, 3 Sep 2014 12:42:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 938432021A for ; Wed, 3 Sep 2014 12:42:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D8C1C201D3 for ; Wed, 3 Sep 2014 12:42:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932171AbaICMmV (ORCPT ); Wed, 3 Sep 2014 08:42:21 -0400 Received: from mail-bn1blp0188.outbound.protection.outlook.com ([207.46.163.188]:19901 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932091AbaICMmU (ORCPT ); Wed, 3 Sep 2014 08:42:20 -0400 Received: from BN3PR0301CA0051.namprd03.prod.outlook.com (25.160.152.147) by BY2PR03MB331.namprd03.prod.outlook.com (10.141.139.20) with Microsoft SMTP Server (TLS) id 15.0.1015.9; Wed, 3 Sep 2014 12:27:05 +0000 Received: from BY2FFO11FD014.protection.gbl (2a01:111:f400:7c0c::173) by BN3PR0301CA0051.outlook.office365.com (2a01:111:e400:401e::19) with Microsoft SMTP Server (TLS) id 15.0.1019.16 via Frontend Transport; Wed, 3 Sep 2014 12:26:43 +0000 Received: from tx30smr01.am.freescale.net (192.88.168.50) by BY2FFO11FD014.mail.protection.outlook.com (10.1.14.76) with Microsoft SMTP Server (TLS) id 15.0.1010.11 via Frontend Transport; Wed, 3 Sep 2014 12:26:42 +0000 Received: from shlinux1.ap.freescale.net (shlinux1.ap.freescale.net [10.192.225.216]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id s83CQT91030283; Wed, 3 Sep 2014 05:26:39 -0700 From: Dong Aisheng To: CC: , , , , Subject: [PATCH 3/7] mmc: sdhci-esdhc-imx: add ADMA Length Mismatch errata fix Date: Wed, 3 Sep 2014 20:04:59 +0800 Message-ID: <1409745903-26550-4-git-send-email-b29396@freescale.com> X-Mailer: git-send-email 1.7.8 In-Reply-To: <1409745903-26550-1-git-send-email-b29396@freescale.com> References: <1409745903-26550-1-git-send-email-b29396@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(6009001)(199003)(189002)(50986999)(21056001)(87286001)(74502001)(44976005)(19580405001)(48376002)(83322001)(19580395003)(74662001)(84676001)(33646002)(102836001)(97736001)(36756003)(99396002)(77156001)(31966008)(106466001)(50226001)(4396001)(104166001)(85306004)(26826002)(50466002)(80022001)(46102001)(81542001)(2351001)(68736004)(92726001)(79102001)(230783001)(47776003)(87936001)(229853001)(85852003)(64706001)(81342001)(107046002)(110136001)(90102001)(83072002)(104016003)(6806004)(20776003)(88136002)(77982001)(62966002)(89996001)(105606002)(93916002)(95666004)(92566001)(76176999)(76482001)(575784001)(42262002); DIR:OUT; SFP:; SCL:1; SRVR:BY2PR03MB331; H:tx30smr01.am.freescale.net; FPR:; MLV:ovrnspm; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;UriScan:; X-Forefront-PRVS: 032334F434 Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=Aisheng.Dong@freescale.com; X-OriginatorOrg: freescale.com Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-8.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The uSDHC has an ADMA Length Mismatch errata ERR004536 which may cause ADMA work abnormally. The errata has already been fixed for i.MX6Q TO1.2 and i.MX6DL TO1.1 by enable the bit 7 in 0x6c register. Unfortunately this fix is not included in i.MX6SL. So we disable ADMA for i.MX6SL and use SDMA instead. Signed-off-by: Dong Aisheng --- drivers/mmc/host/sdhci-esdhc-imx.c | 18 +++++++++++++++++- 1 files changed, 17 insertions(+), 1 deletions(-) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 9594bf8..dc0e384 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -114,6 +114,12 @@ #define ESDHC_FLAG_STD_TUNING BIT(5) /* The IP has SDHCI_CAPABILITIES_1 register */ #define ESDHC_FLAG_HAVE_CAP1 BIT(6) +/* + * The IP has errata ERR004536 + * uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow, + * when reading data from the card + */ +#define ESDHC_FLAG_ERR004536 BIT(7) struct esdhc_soc_data { u32 flags; @@ -141,7 +147,7 @@ static struct esdhc_soc_data usdhc_imx6q_data = { static struct esdhc_soc_data usdhc_imx6sl_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING - | ESDHC_FLAG_HAVE_CAP1, + | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536, }; struct pltfm_imx_data { @@ -1050,6 +1056,13 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) writel(0x08100810, host->ioaddr + ESDHC_WTMK_LVL); host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; host->mmc->caps |= MMC_CAP_1_8V_DDR; + + /* + * errata ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL + * TO1.1, it's harmless for MX6SL + */ + writel(readl(host->ioaddr + 0x6c) | BIT(7), + host->ioaddr + 0x6c); } if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) @@ -1061,6 +1074,9 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP, host->ioaddr + ESDHC_TUNING_CTRL); + if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536) + host->quirks |= SDHCI_QUIRK_BROKEN_ADMA; + boarddata = &imx_data->boarddata; if (sdhci_esdhc_imx_probe_dt(pdev, boarddata) < 0) { if (!host->mmc->parent->platform_data) {