sdmmc_io_write_multi_1
sdmmc_io_write_multi_1(ssc->sc_sf,
error = sdmmc_io_write_multi_1(sc->sc_sf, SBT_REG_DAT, hdr, 3);
error = sdmmc_io_write_multi_1(sc->sc_sf, SBT_REG_DAT, buf, len);
int sdmmc_io_write_multi_1(struct sdmmc_function *, int, u_char *, int);