From 12021fff2bae7fab01c4bf283f3cd9bc6997d8c4 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Mon, 13 Jun 2005 20:58:56 -0500 Subject: [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 --- drivers/scsi/aic7xxx/aic7xxx_osm.c | 35 +++++++++++++++++++++++++---------- 1 file changed, 25 insertions(+), 10 deletions(-) (limited to 'drivers/scsi/aic7xxx/aic7xxx_osm.c') diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c index 55e0b2875f9..e3892585d7e 100644 --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -621,20 +621,35 @@ ahc_linux_target_alloc(struct scsi_target *starget) memset(targ, 0, sizeof(*targ)); if (sc) { + 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 ((ahc->features & AHC_ULTRA2) != 0) { - scsirate = sc->device_flags[target_offset] & CFXFER; + scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); } else { - scsirate = (sc->device_flags[target_offset] & CFXFER) << 4; - if (sc->device_flags[target_offset] & CFSYNCH) - scsirate |= SOFS; + scsirate = (flags & CFXFER) << 4; + maxsync = ultra ? AHC_SYNCRATE_ULTRA : + AHC_SYNCRATE_FAST; } - if (sc->device_flags[target_offset] & CFWIDEB) { - scsirate |= WIDEXFER; - spi_max_width(starget) = 1; - } else - spi_max_width(starget) = 0; + 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); } -- cgit v1.2.3-70-g09d2