wctdm24xxp: Use state machine to debounce fxs hook state.

Also do not assume that check_hook is called every millisecond.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/dahdi/wctdm24xxp/wctdm24xxp.h b/drivers/dahdi/wctdm24xxp/wctdm24xxp.h
index ec2d815..2ce703c 100644
--- a/drivers/dahdi/wctdm24xxp/wctdm24xxp.h
+++ b/drivers/dahdi/wctdm24xxp/wctdm24xxp.h
@@ -46,6 +46,7 @@
  */
 #define DEFAULT_RING_DEBOUNCE	1024
 #define POLARITY_DEBOUNCE	64		/* Polarity debounce (in ms) */
+#define FXS_HOOK_DEBOUNCE	8		/* in ms */
 
 #define OHT_TIMER		6000	/* How long after RING to retain OHT */
 
@@ -107,6 +108,14 @@ enum battery_state {
 	BATTERY_LOST,
 };
 
+enum hook_state {
+	UNKNOWN_HOOK = 0,
+	ON_HOOK,
+	DEBOUNCING_ON_HOOK,
+	OFF_HOOK,
+	DEBOUNCING_OFF_HOOK,
+};
+
 struct wctdm_cmd {
 	struct list_head node;
 	struct completion *complete;