F_SDH30_AHB_CONFIG
ctl = sdhci_readw(host, F_SDH30_AHB_CONFIG);
sdhci_writew(host, ctl, F_SDH30_AHB_CONFIG);
ctrl = sdhci_readw(host, F_SDH30_AHB_CONFIG);
sdhci_writew(host, ctrl, F_SDH30_AHB_CONFIG);