SD_CARDCLOCKCTRL
iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
iowrite16(clk, host->ioaddr + SD_CARDCLOCKCTRL);