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[SCSI] aic7xxx: fix the BIOS limits setting routines 

Following the go around over the SONY DVD that needs artificial limits,
this should be the correct code for all cases (minus the debugging
prints).

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
hifive-unleashed-5.1
James Bottomley 2005-06-13 20:58:56 -05:00 committed by James Bottomley
parent d736a27b7e
commit 12021fff2b
1 changed files with 27 additions and 12 deletions
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39
drivers/scsi/aic7xxx/aic7xxx_osm.c
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@ -621,20 +621,35 @@ ahc_linux_target_alloc(struct scsi_target *starget)
memset(targ, 0, sizeof(*targ));
if (sc) {
if ((ahc->features & AHC_ULTRA2) != 0) {
scsirate = sc->device_flags[target_offset] & CFXFER;
} else {
scsirate = (sc->device_flags[target_offset] & CFXFER) << 4;
if (sc->device_flags[target_offset] & CFSYNCH)
scsirate |= SOFS;
int maxsync = AHC_SYNCRATE_DT;
int ultra = 0;
int flags = sc->device_flags[target_offset];
if (ahc->flags & AHC_NEWEEPROM_FMT) {
if (flags & CFSYNCHISULTRA)
ultra = 1;
} else if (flags & CFULTRAEN)
ultra = 1;
/* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
* change it to ultra=0, CFXFER = 0 */
if(ultra && (flags & CFXFER) == 0x04) {
ultra = 0;
flags &= ~CFXFER;
}
if (sc->device_flags[target_offset] & CFWIDEB) {
scsirate |= WIDEXFER;
spi_max_width(starget) = 1;
} else
spi_max_width(starget) = 0;
if ((ahc->features & AHC_ULTRA2) != 0) {
scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
} else {
scsirate = (flags & CFXFER) << 4;
maxsync = ultra ? AHC_SYNCRATE_ULTRA :
AHC_SYNCRATE_FAST;
}
spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
if (!(flags & CFSYNCH))
spi_max_offset(starget) = 0;
spi_min_period(starget) =
ahc_find_period(ahc, scsirate, AHC_SYNCRATE_DT);
ahc_find_period(ahc, scsirate, maxsync);
tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
starget->id, &tstate);
}