RTSX_SD_EXIST
if (status & RTSX_SD_EXIST) {
if (attaching && (status & RTSX_SD_EXIST))
if (READ4(sc, RTSX_BIPR) & RTSX_SD_EXIST)
#define RTSX_CARD_EXIST (RTSX_XD_EXIST|RTSX_MS_EXIST|RTSX_SD_EXIST)