+static void ahc_linux_get_signalling(struct Scsi_Host *shost)
+{
+ struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
+ unsigned long flags;
+ u8 mode;
+
+ if (!(ahc->features & AHC_ULTRA2)) {
+ /* non-LVD chipset, may not have SBLKCTL reg */
+ spi_signalling(shost) =
+ ahc->features & AHC_HVD ?
+ SPI_SIGNAL_HVD :
+ SPI_SIGNAL_SE;
+ return;
+ }
+
+ ahc_lock(ahc, &flags);
+ ahc_pause(ahc);
+ mode = ahc_inb(ahc, SBLKCTL);
+ ahc_unpause(ahc);
+ ahc_unlock(ahc, &flags);
+
+ if (mode & ENAB40)
+ spi_signalling(shost) = SPI_SIGNAL_LVD;
+ else if (mode & ENAB20)
+ spi_signalling(shost) = SPI_SIGNAL_SE;
+ else
+ spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
+}
+