[SCSI] aic79xx: Print out signalling

This is a cross-port of a similar patch for aic7xxx;
only it's a bit simpler here as we don't support HVD
and all controller actually implement this register.
I hope.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index e7a32f8..9bfcca5 100644 (file)
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -2694,7 +2694,25 @@ static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
        ahd_unlock(ahd, &flags);
 }
 
+static void ahd_linux_get_signalling(struct Scsi_Host *shost)
+{
+       struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
+       unsigned long flags;
+       u8 mode;
 
+       ahd_lock(ahd, &flags);
+       ahd_pause(ahd);
+       mode = ahd_inb(ahd, SBLKCTL);
+       ahd_unpause(ahd);
+       ahd_unlock(ahd, &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;
+}
 
 static struct spi_function_template ahd_linux_transport_functions = {
        .set_offset     = ahd_linux_set_offset,
@@ -2719,6 +2737,7 @@ static struct spi_function_template ahd_linux_transport_functions = {
        .show_pcomp_en  = 1,
        .set_hold_mcs   = ahd_linux_set_hold_mcs,
        .show_hold_mcs  = 1,
+       .get_signalling = ahd_linux_get_signalling,
 };
 
 static int __init