From 3ebcec3e2872165a52081abc984ad365b52687ed Mon Sep 17 00:00:00 2001
From: Miod Vallat <miod@cvs.openbsd.org>
Date: Sun, 10 Sep 2000 01:11:53 +0000
Subject: Pull in two asc fixes from NetBSD, makes pmax port on DS5000/200
 alive again

---
 sys/dev/tc/asc.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

(limited to 'sys')

diff --git a/sys/dev/tc/asc.c b/sys/dev/tc/asc.c
index 57f88ebc608..863abac8f8e 100644
--- a/sys/dev/tc/asc.c
+++ b/sys/dev/tc/asc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: asc.c,v 1.14 1998/05/18 00:25:06 millert Exp $	*/
+/*	$OpenBSD: asc.c,v 1.15 2000/09/10 01:11:52 miod Exp $	*/
 /*	$NetBSD: asc.c,v 1.46 1998/05/08 15:39:01 mhitch Exp $	*/
 
 /*-
@@ -754,10 +754,6 @@ asc_startcmd(asc, target)
 		asc_logp = asc_log;
 #endif
 
-	/* preload the FIFO with the message to be sent */
-	regs->asc_fifo = SCSI_DIS_REC_IDENTIFY;
-	tc_mb();
-
 	/* initialize the DMA */
 	len = (*asc->dma_start)(asc, state, scsicmd->cmd, ASCDMA_WRITE,
 	   len, 0);
@@ -778,6 +774,10 @@ asc_startcmd(asc, target)
 		return;
 	}
 
+	/* preload the FIFO with the message to be sent */
+	regs->asc_fifo = SCSI_DIS_REC_IDENTIFY;
+	tc_mb();
+
 	if (state->flags & TRY_SYNC)
 		regs->asc_cmd = len = ASC_CMD_SEL_ATN_STOP;
 	else
@@ -903,25 +903,25 @@ again:
 		state = &asc->st[asc->target];
 		switch (ASC_PHASE(status)) {
 		case SCSI_PHASE_DATAI:
-			if ((asc->script - asc_scripts) == SCRIPT_DATA_IN + 1 ||
-			    (asc->script - asc_scripts) == SCRIPT_CONTINUE_IN) {
-			    	/*
+		case SCSI_PHASE_DATAO:
+			ASC_TC_GET(regs, len);
+			fifo = regs->asc_flags & ASC_FLAGS_FIFO_CNT;
+			if (len != 0 && (
+			    (asc->script - asc_scripts) == SCRIPT_DATA_IN + 1 ||
+			    (asc->script - asc_scripts) == SCRIPT_CONTINUE_IN ||
+			    (asc->script - asc_scripts) == SCRIPT_DATA_OUT + 1 ||
+			    (asc->script - asc_scripts) == SCRIPT_CONTINUE_OUT)) { /*
 			    	 * From the Mach driver:
-			    	 * After a reconnect and restart dma in, we
+			    	 * After a reconnect and restart dma in/out, we
 			    	 * seem to have gotten an interrupt even though
 			    	 * the DMA is running.  The Mach driver just
 			    	 * ignores this interrupt.
 			    	 */
-				ASC_TC_GET(regs, len);
-				fifo = regs->asc_flags & ASC_FLAGS_FIFO_CNT;
 			    	printf("asc_intr: ignoring strange interrupt");
-			    	printf(" tc %d fifo residue %d\n", len, fifo);
+			    	printf(" tc %d fifo residue %d script %d\n",
+				    len, fifo, asc->script - asc_scripts);
 			    	goto done;
 			}
-			/* FALLTHROUGH */
-		case SCSI_PHASE_DATAO:
-			ASC_TC_GET(regs, len);
-			fifo = regs->asc_flags & ASC_FLAGS_FIFO_CNT;
 			printf("asc_intr: data overrun: buflen %d dmalen %d tc %d fifo %d\n",
 				state->buflen, state->dmalen, len, fifo);
 			goto abort;
-- 
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