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[SCSI] aic7xxx: fix the BIOS limits setting routines

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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>
This commit is contained in:
James Bottomley 2005-06-13 20:58:56 -05:00 • committed by James Bottomley
commit 12021fff2b
1 changed files with 25 additions and 10 deletions
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39
drivers/scsi/aic7xxx/aic7xxx_osm.c
View file

@ -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);
}