From 285f8809474ef89dec537b3b4c39c14d080002d1 Mon Sep 17 00:00:00 2001
From: "Federico G. Schwindt" <fgsch@cvs.openbsd.org>
Date: Thu, 28 Oct 1999 19:59:28 +0000
Subject: Downgrade to mode 2 first if we were udma > 2; from NetBSD. costa@
 ok.

---
 sys/dev/ic/wdc.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'sys/dev/ic')

diff --git a/sys/dev/ic/wdc.c b/sys/dev/ic/wdc.c
index 270ebaff974..620c74a9ec7 100644
--- a/sys/dev/ic/wdc.c
+++ b/sys/dev/ic/wdc.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: wdc.c,v 1.10 1999/10/09 03:42:04 csapuntz Exp $     */
+/*      $OpenBSD: wdc.c,v 1.11 1999/10/28 19:59:27 fgsch Exp $     */
 /*	$NetBSD: wdc.c,v 1.68 1999/06/23 19:00:17 bouyer Exp $ */
 
 
@@ -1044,6 +1044,16 @@ wdc_downgrade_mode(drvp)
 	    (cf_flags & ATA_CONFIG_UDMA_SET))
 		return 0;
 
+	/*
+	 * If we were using Ultra-DMA mode > 2, downgrade to mode 2 first.
+	 * Maybe we didn't properly notice the cable type
+	 */
+	if ((drvp->drive_flags & DRIVE_UDMA) && drvp->UDMA_mode > 2) {
+		drvp->UDMA_mode = 2;
+		printf("%s: transfer error, downgrading to DMA mode %d\n",
+		    drv_dev->dv_xname, drvp->UDMA_mode);
+	}
+
 	/*
 	 * If we were using ultra-DMA, don't downgrade to multiword DMA
 	 * if we noticed a CRC error. It has been noticed that CRC errors
-- 
cgit v1.2.3