S3C_SDHCI_CONTROL2
ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);