aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/aic7xxx/aic79xx_core.c
diff options
context:
space:
mode:
authorHannes Reinecke <hare@suse.de>2006-01-24 10:44:38 +0100
committerJames Bottomley <jejb@mulgrave.(none)>2006-01-31 14:39:48 -0600
commit3fb086126462c2de06dddaec58981d8827be100d (patch)
treeeaa3e79ef84f8a68246e0ba68a1d048b03e9acd4 /drivers/scsi/aic7xxx/aic79xx_core.c
parent53467e636b7beb350c307cc88323aae4676577f2 (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.c21
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");
+ }
}
/*