diff options
| author | Hannes Reinecke <hare@suse.de> | 2006-01-24 10:44:38 +0100 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2006-01-31 14:39:48 -0600 |
| commit | 3fb086126462c2de06dddaec58981d8827be100d (patch) | |
| tree | eaa3e79ef84f8a68246e0ba68a1d048b03e9acd4 /drivers/scsi/aic7xxx/aic79xx_core.c | |
| parent | 53467e636b7beb350c307cc88323aae4676577f2 (diff) | |
[SCSI] aic79xx: SLOWCRC fix
This patch introduces the SLOWCRC handling for certain buggy chipsets.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/aic7xxx/aic79xx_core.c')
| -rw-r--r-- | drivers/scsi/aic7xxx/aic79xx_core.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c index dfd4cc93c05..6114b3e72ca 100644 --- a/drivers/scsi/aic7xxx/aic79xx_core.c +++ b/drivers/scsi/aic7xxx/aic79xx_core.c @@ -3332,6 +3332,15 @@ ahd_update_neg_table(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, con_opts |= WIDEXFER; /* + * Slow down our CRC interval to be + * compatible with packetized U320 devices + * that can't handle a CRC at full speed + */ + if (ahd->features & AHD_AIC79XXB_SLOWCRC) { + con_opts |= ENSLOWCRC; + } + + /* * During packetized transfers, the target will * give us the oportunity to send command packets * without us asserting attention. @@ -6740,6 +6749,18 @@ ahd_chip_init(struct ahd_softc *ahd) ahd_loadseq(ahd); ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); + + if (ahd->features & AHD_AIC79XXB_SLOWCRC) { + u_int negodat3 = ahd_inb(ahd, NEGCONOPTS); + + negodat3 |= ENSLOWCRC; + ahd_outb(ahd, NEGCONOPTS, negodat3); + negodat3 = ahd_inb(ahd, NEGCONOPTS); + if (!(negodat3 & ENSLOWCRC)) + printf("aic79xx: failed to set the SLOWCRC bit\n"); + else + printf("aic79xx: SLOWCRC bit set\n"); + } } /* |