From patchwork Wed Jan 12 02:59:12 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaehoon Chung X-Patchwork-Id: 473051 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p0C8XI1g022364 for ; Wed, 12 Jan 2011 08:33:27 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932797Ab1ALC7w (ORCPT ); Tue, 11 Jan 2011 21:59:52 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:12173 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932795Ab1ALC7u (ORCPT ); Tue, 11 Jan 2011 21:59:50 -0500 Received: from epmmp2 (mailout3.samsung.com [203.254.224.33]) by mailout3.samsung.com (Oracle Communications Messaging Exchange Server 7u4-19.01 64bit (built Sep 7 2010)) with ESMTP id <0LEW004I92ZICB80@mailout3.samsung.com> for linux-mmc@vger.kernel.org; Wed, 12 Jan 2011 11:59:42 +0900 (KST) Received: from TNRNDGASPAPP1.tn.corp.samsungelectronics.net ([165.213.149.150]) by mmp2.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0LEW00HXW2ZITT@mmp2.samsung.com> for linux-mmc@vger.kernel.org; Wed, 12 Jan 2011 11:59:42 +0900 (KST) Received: from [10.89.53.154] ([10.89.53.154]) by TNRNDGASPAPP1.tn.corp.samsungelectronics.net with Microsoft SMTPSVC(6.0.3790.4675); Wed, 12 Jan 2011 11:59:42 +0900 Date: Wed, 12 Jan 2011 11:59:12 +0900 From: Jaehoon Chung Subject: Re: [PATCH] sdhci-s3c: add platform_8bit_width() In-reply-to: <20110112022030.GA27414@void.printf.net> To: Chris Ball Cc: "linux-mmc@vger.kernel.org" , Kyungmin Park , Ben Dooks Message-id: <4D2D1900.1020200@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT User-Agent: Thunderbird 2.0.0.24 (X11/20100317) References: <4D2CF631.4080402@samsung.com> <20110112022030.GA27414@void.printf.net> X-OriginalArrivalTime: 12 Jan 2011 02:59:42.0249 (UTC) FILETIME=[C278A190:01CBB204] Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Wed, 12 Jan 2011 08:33:27 +0000 (UTC) diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c index 70cc3d7..8d27bbd 100644 --- a/drivers/mmc/host/sdhci-s3c.c +++ b/drivers/mmc/host/sdhci-s3c.c @@ -276,10 +276,41 @@ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) host->clock = clock; } +/* + * sdhci_s3c_platform_8bit_width - support 8bit buswidth + * + * We have 8-bit width support but is not a v3 controller. + * So we add platform_8bit_width() and support 8bit width. + **/ +static int sdhci_s3c_platform_8bit_width(struct sdhci_host *host, int width) +{ + u8 ctrl; + + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); + + switch (width) { + case MMC_BUS_WIDTH_8: + ctrl |= SDHCI_CTRL_8BITBUS; + ctrl &= ~SDHCI_CTRL_4BITBUS; + break; + case MMC_BUS_WIDTH_4: + ctrl |= SDHCI_CTRL_4BITBUS; + ctrl &= ~SDHCI_CTRL_8BITBUS; + break; + default: + break; + } + + sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); + + return 0; +} + static struct sdhci_ops sdhci_s3c_ops = { .get_max_clock = sdhci_s3c_get_max_clk, .set_clock = sdhci_s3c_set_clock, .get_min_clock = sdhci_s3c_get_min_clock, + .platform_8bit_width = sdhci_s3c_platform_8bit_width, }; static void sdhci_s3c_notify_change(struct platform_device *dev, int state) @@ -472,6 +503,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev) if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) host->mmc->caps = MMC_CAP_NONREMOVABLE; + if (pdata->host_caps) + host->mmc->caps |= pdata->host_caps; + host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE);