From b4b9c88ccd625d7840111159f42b72bcda883227 Mon Sep 17 00:00:00 2001
From: markster <markster@5390a7c7-147a-4af0-8ec9-7488f05a26cb>
Date: Thu, 5 Jun 2003 15:22:56 +0000
Subject: Enhance watchdog support

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@190 5390a7c7-147a-4af0-8ec9-7488f05a26cb
---
 wcfxo.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

(limited to 'wcfxo.c')

diff --git a/wcfxo.c b/wcfxo.c
index 17c3621..fb12d73 100755
--- a/wcfxo.c
+++ b/wcfxo.c
@@ -403,10 +403,9 @@ static void wcfxo_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 	}
 
 	if (ints & 0x10) {
-		printk("PCI Master abort\n");
-		/* Stop DMA and start it again */
+		printk("FXO PCI Master abort\n");
+		/* Stop DMA andlet the watchdog start it again */
 		wcfxo_stop_dma(wc);
-		wcfxo_restart_dma(wc);
 		return;
 	}
 
@@ -513,6 +512,13 @@ static int wcfxo_open(struct zt_chan *chan)
 	return 0;
 }
 
+static int wcfxo_watchdog(struct zt_span *span, int event)
+{
+	printk("FXO: Restarting DMA\n");
+	wcfxo_restart_dma(span->pvt);
+	return 0;
+}
+
 static int wcfxo_close(struct zt_chan *chan)
 {
 	struct wcfxo *wc = chan->pvt;
@@ -582,6 +588,7 @@ static int wcfxo_initialize(struct wcfxo *wc)
 	wc->span.close = wcfxo_close;
 	wc->span.flags = ZT_FLAG_RBS;
 	wc->span.deflaw = ZT_LAW_MULAW;
+	wc->span.watchdog = wcfxo_watchdog;
 #ifdef ENABLE_TASKLETS
 	tasklet_init(&wc->wcfxo_tlet, wcfxo_tasklet, (unsigned long)wc);
 #endif
@@ -666,12 +673,7 @@ static void wcfxo_start_dma(struct wcfxo *wc)
 
 static void wcfxo_restart_dma(struct wcfxo *wc)
 {
-	int x;
 	/* Reset Master and TDM */
-	outb(0x0f, wc->ioaddr + WC_CNTL);
-	/* Can't really wait, so simulate a wait */
-	for (x=0;x<100;x++)
-		inb( wc->ioaddr + WC_CNTL);
 	outb(0x01, wc->ioaddr + WC_CNTL);
 	outb(0x01, wc->ioaddr + WC_OPER);
 }
@@ -682,6 +684,12 @@ static void wcfxo_stop_dma(struct wcfxo *wc)
 	outb(0x00, wc->ioaddr + WC_OPER);
 }
 
+static void wcfxo_reset_tdm(struct wcfxo *wc)
+{
+	/* Reset TDM */
+	outb(0x0f, wc->ioaddr + WC_CNTL);
+}
+
 static void wcfxo_disable_interrupts(struct wcfxo *wc)	
 {
 	outb(0x00, wc->ioaddr + WC_MASK0);
@@ -872,6 +880,7 @@ static void __devexit wcfxo_remove_one(struct pci_dev *pdev)
 
 		/* Stop any DMA */
 		wcfxo_stop_dma(wc);
+		wcfxo_reset_tdm(wc);
 
 		/* In case hardware is still there */
 		wcfxo_disable_interrupts(wc);
-- 
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