ESDHC_WTMK_LVL
writel(ESDHC_WTMK_DEFAULT_VAL, host->ioaddr + ESDHC_WTMK_LVL);
m = readl(host->ioaddr + ESDHC_WTMK_LVL);
writel(m, host->ioaddr + ESDHC_WTMK_LVL);