wctdm24xxp, voicebus: Enable the watchdog for the wctdm24xxp driver.

Allows the wctdm24xxp driver to use the default dahdi watchdog facility to
kickstart the board in case it stops generating interrupts. DAHDI-254.

git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.4@4655 5390a7c7-147a-4af0-8ec9-7488f05a26cb

4 files changed, 26 insertions, 1 deletions

diff --git a/kernel/voicebus.c b/kernel/voicebus.c
index aabfd8c..6724d32 100644
--- a/kernel/voicebus.c
+++ b/kernel/voicebus.c
@@ -39,6 +39,7 @@
 #include <linux/interrupt.h>
 #include <linux/timer.h>
 
+#include "zconfig.h"
 #include "voicebus.h"
 
 #define assert(__x__) BUG_ON(!(__x__))
@@ -846,6 +847,7 @@ __vb_disable_interrupts(struct voicebus *vb)
 	__vb_setctl(vb, IER_CSR7, 0); 
 }
 
+
 static void
 vb_disable_interrupts(struct voicebus *vb)
 {
@@ -947,6 +949,19 @@ voicebus_start(struct voicebus *vb)
 	return 0;
 }
 
+#ifdef CONFIG_ZAPTEL_WATCHDOG
+/**
+ * voicebus_watchdog - Called from a watchdog function to restart interrupts.
+ *
+ */
+int voicebus_watchdog(struct voicebus *vb)
+{
+       vb_tx_demand_poll(vb);
+       return 0;
+}
+EXPORT_SYMBOL(voicebus_watchdog);
+#endif
+
 static void 
 vb_clear_start_transmit_bit(struct voicebus *vb)
 {
diff --git a/kernel/voicebus.h b/kernel/voicebus.h
index c234690..59ec484 100644
--- a/kernel/voicebus.h
+++ b/kernel/voicebus.h
@@ -50,5 +50,8 @@ void voicebus_free(struct voicebus *vb, void *vbb);
 int voicebus_transmit(struct voicebus *vb, void *vbb);
 int voicebus_set_minlatency(struct voicebus *vb, unsigned int milliseconds);
 int voicebus_current_latency(struct voicebus *vb) ;
+#ifdef CONFIG_ZAPTEL_WATCHDOG
+int voicebus_watchdog(struct voicebus *vb);
+#endif
  
 #endif /* __VOICEBUS_H__ */
diff --git a/kernel/wctdm24xxp/base.c b/kernel/wctdm24xxp/base.c
index bf8a409..e9165f7 100644
--- a/kernel/wctdm24xxp/base.c
+++ b/kernel/wctdm24xxp/base.c
@@ -2704,11 +2704,16 @@ static int wctdm_open(struct zt_chan *chan)
 	return 0;
 }
 
+#ifdef CONFIG_ZAPTEL_WATCHDOG
 static int wctdm_watchdog(struct zt_span *span, int event)
 {
+	struct wctdm *wc = span->pvt;
 	printk("TDM: Called watchdog\n");
+	if (ZT_WATCHDOG_NOINTS == event)
+		voicebus_watchdog(wc->vb);
 	return 0;
 }
+#endif
 
 static int wctdm_close(struct zt_chan *chan)
 {
@@ -2960,7 +2965,9 @@ static int wctdm_initialize(struct wctdm *wc)
 	wc->span.close = wctdm_close;
 	wc->span.flags = ZT_FLAG_RBS;
 	wc->span.ioctl = wctdm_ioctl;
+#ifdef CONFIG_ZAPTEL_WATCHDOG
 	wc->span.watchdog = wctdm_watchdog;
+#endif
 	wc->span.dacs= wctdm_dacs;
 #ifdef VPM_SUPPORT
 	wc->span.echocan_with_params = wctdm_echocan_with_params;
diff --git a/kernel/zconfig.h b/kernel/zconfig.h
index 26d1755..7239c7f 100644
--- a/kernel/zconfig.h
+++ b/kernel/zconfig.h
@@ -147,7 +147,7 @@
  * Uncomment to enable "watchdog" to monitor if interfaces
  * stop taking interrupts or otherwise misbehave
  */
-/* #define CONFIG_ZAPTEL_WATCHDOG */
+#define CONFIG_ZAPTEL_WATCHDOG
 
 /*
  * Uncomment for Non-standard FXS groundstart start state (A=Low, B=Low)