SDHC_EXECUTE_TUNING
HWRITE2(hp, SDHC_HOST_CTL2, SDHC_EXECUTE_TUNING);
} while (HREAD2(hp, SDHC_HOST_CTL2) & SDHC_EXECUTE_TUNING && --retry);
if (HREAD2(hp, SDHC_HOST_CTL2) & SDHC_EXECUTE_TUNING) {
SDHC_SAMPLING_CLOCK_SEL|SDHC_EXECUTE_TUNING);
SDHC_SAMPLING_CLOCK_SEL|SDHC_EXECUTE_TUNING);