From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaehoon Chung Subject: [PATCH] sdhci-s3c: add platform_8bit_width() Date: Wed, 12 Jan 2011 09:30:41 +0900 Message-ID: <4D2CF631.4080402@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7BIT Return-path: Received: from mailout4.samsung.com ([203.254.224.34]:11229 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756304Ab1ALAbM (ORCPT ); Tue, 11 Jan 2011 19:31:12 -0500 Received: from epmmp2 (mailout4.samsung.com [203.254.224.34]) by mailout4.samsung.com (Oracle Communications Messaging Exchange Server 7u4-19.01 64bit (built Sep 7 2010)) with ESMTP id <0LEV0071BW3ZIW80@mailout4.samsung.com> for linux-mmc@vger.kernel.org; Wed, 12 Jan 2011 09:31:11 +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 <0LEV008YUW3ZHO@mmp2.samsung.com> for linux-mmc@vger.kernel.org; Wed, 12 Jan 2011 09:31:11 +0900 (KST) Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: "linux-mmc@vger.kernel.org" Cc: Kyungmin Park , Chris Ball , Ben Dooks This patch is added platform_8bit_width() function in sdhci-s3c. We has 8-bit width support but is not a v3 controller. So we need platform_8bit_width() to support 8-bit buswidth. Also we need MMC_CAP_8_BIT_DATA, so we added them in platdata. Signed-off-by: Jaehoon Chung Signed-off-by: Kyungmin Park --- drivers/mmc/host/sdhci-s3c.c | 32 ++++++++++++++++++++++++++++++++ 1 files changed, 32 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c index 70cc3d7..4dc7d6d 100644 --- a/drivers/mmc/host/sdhci-s3c.c +++ b/drivers/mmc/host/sdhci-s3c.c @@ -276,10 +276,39 @@ 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 has 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 bus_width) +{ + u8 ctrl; + + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); + + if (bus_width == MMC_BUS_WIDTH_8) + ctrl |= SDHCI_CTRL_8BITBUS; + else + ctrl &= ~SDHCI_CTRL_8BITBUS; + + if (bus_width == MMC_BUS_WIDTH_4) + ctrl |= SDHCI_CTRL_4BITBUS; + else + ctrl &= ~SDHCI_CTRL_4BITBUS; + + 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 +501,9 @@ 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); -- 1.6.0.4