SDMMC_RINTSTS
WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_RXDR);
WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_TXDR);
WRITE4(sc, SDMMC_RINTSTS, reg);
WRITE4(sc, SDMMC_RINTSTS, 0xffffffff);
WRITE4(sc, SDMMC_RINTSTS, 0xffffffff);