RTSX_SD_PUSH_POINT_CTL
RTSX_CLR(sc, RTSX_SD_PUSH_POINT_CTL, 0xff);
RTSX_BITOP(sc, RTSX_SD_PUSH_POINT_CTL,
RTSX_WRITE(sc, RTSX_SD_PUSH_POINT_CTL, RTSX_SD20_TX_NEG_EDGE);