wb_read
val = wb_read(wb, WB_SD_CSR);
while ((wb_read(wb, WB_SD_FIFOSTS) & WB_FIFO_EMPTY) == 0)
wb_read(wb, WB_SD_FIFO);
val = wb_read(wb, WB_SD_CSR);
rv = (wb_read(wb, WB_SD_CSR) & WB_CSR_CARD_PRESENT) ? 1 : 0;
rv = (wb_read(wb, WB_SD_CSR) & WB_CSR_WRITE_PROTECT) ? 1 : 0;
fifosts = wb_read(wb, WB_SD_FIFOSTS);
fifosts = wb_read(wb, WB_SD_FIFOSTS);
fifosts = wb_read(wb, WB_SD_FIFOSTS);
val = wb_read(wb, WB_SD_INTSTS);
uint8_t wb_read(struct wb_softc *, uint8_t);