Create "noburst" option to disable burst mode during bus mastering

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@436 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 6 insertions, 0 deletions

diff --git a/wct4xxp.c b/wct4xxp.c
index 57caca3..2cf9c9a 100755
--- a/wct4xxp.c
+++ b/wct4xxp.c
@@ -60,6 +60,7 @@ static int highestorder;
 static int t1e1override = -1;
 static int loopback = 0;
 static int alarmdebounce = 0;
+static int noburst = 0;
 
 #ifdef FANCY_ALARM
 static int altab[] = {
@@ -878,6 +879,8 @@ static int t4_startup(struct zt_span *span)
 			/* enable interrupts */
 		/* Start DMA, enabling DMA interrupts on read only */
 		wc->dmactrl = 0xc0000003 | (1 << 29);
+		if (noburst)
+			wc->dmactrl |= (1 << 26);
 		__t4_pci_out(wc, WC_DMACTRL, wc->dmactrl);
 	}
 
@@ -1404,6 +1407,8 @@ static int t4_reset_dma(struct t4 *wc)
 	t4_pci_out(wc, WC_COUNT, ((ZT_MAX_CHUNKSIZE * 2 * 32 - 1) << 18) | ((ZT_MAX_CHUNKSIZE * 2 * 32 - 1) << 2));
 	t4_pci_out(wc, WC_INTR, 0);
 	wc->dmactrl = 0xc0000003 | (1 << 29);
+	if (noburst)
+		wc->dmactrl |= (1 << 26);
 	t4_pci_out(wc, WC_DMACTRL, wc->dmactrl);
 	return 0;
 }
@@ -1732,6 +1737,7 @@ MODULE_LICENSE("GPL");
 #endif
 MODULE_PARM(debug, "i");
 MODULE_PARM(loopback, "i");
+MODULE_PARM(noburst, "i");
 MODULE_PARM(timingcable, "i");
 MODULE_PARM(t1e1override, "i");
 MODULE_PARM(alarmdebounce, "i");