Debug message updates:

 - Shrink messaging during resets, primarily by getting rid of
   "nothing happened" noise that hides *useful* information.

 - Improve: the "no IDCODE" message by identifying which tap only
   supports BYPASS; and the TAP event strings.

Related minor code updates:

 - Remove two needless tests when examining the chain:  we know
   we have a TAP, and that all TAPs have names.

 - Clean up two loops, turning "while"s into "for"s which better
   show what's actually being done.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2736 b42882b7-edfa-0310-969c-e2dbd0fdcd60

3 files changed, 8 insertions, 43 deletions

diff --git a/src/jtag/core.c b/src/jtag/core.c
index 6a314ece..bf4a9cc7 100644
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -60,9 +60,9 @@ static int jtag_error = ERROR_OK;
 
 static const char *jtag_event_strings[] =
 {
-	[JTAG_TRST_ASSERTED] = "JTAG controller reset (TLR or TRST)",
+	[JTAG_TRST_ASSERTED] = "TAP reset",
 	[JTAG_TAP_EVENT_ENABLE] = "TAP enabled",
-	[JTAG_TAP_EVENT_POST_RESET] = "post reset",
+	[JTAG_TAP_EVENT_POST_RESET] = "TAP post reset",
 	[JTAG_TAP_EVENT_DISABLE] = "TAP disabled",
 };
 
@@ -820,9 +820,6 @@ static int jtag_reset_callback(enum jtag_event event, void *priv)
 {
 	jtag_tap_t *tap = priv;
 
-	LOG_DEBUG("TAP %s event %s", tap->dotted_name,
-			jtag_event_strings[event]);
-
 	if (event == JTAG_TRST_ASSERTED)
 	{
 		tap->enabled = !tap->disabled_after_reset;
@@ -943,15 +940,10 @@ static bool jtag_examine_chain_match_tap(const struct jtag_tap_s *tap)
 	for (ii = 0; ii < tap->expected_ids_cnt; ii++)
 	{
 		if (tap->idcode == tap->expected_ids[ii])
-			break;
+			return true;
 	}
 
 	/* If none of the expected ids matched, log an error */
-	if (ii != tap->expected_ids_cnt)
-	{
-		LOG_DEBUG("JTAG Tap/device matched");
-		return true;
-	}
 	jtag_examine_chain_display(LOG_LVL_ERROR, "got",
 			tap->dotted_name, tap->idcode);
 	for (ii = 0; ii < tap->expected_ids_cnt; ii++)
@@ -994,7 +986,8 @@ static int jtag_examine_chain(void)
 		if ((idcode & 1) == 0)
 		{
 			/* LSB must not be 0, this indicates a device in bypass */
-			LOG_WARNING("Tap/Device does not have IDCODE");
+			LOG_WARNING("TAP %s does not have IDCODE",
+					tap->dotted_name);
 			idcode = 0;
 			tap->hasidcode = false;
 
@@ -1017,15 +1010,11 @@ static int jtag_examine_chain(void)
 			}
 
 			jtag_examine_chain_display(LOG_LVL_INFO, "tap/device found",
-					tap ? tap->dotted_name : "(not-named)",
-					idcode);
+					tap->dotted_name, idcode);
 
 			bit_count += 32;
 		}
 		device_count++;
-		if (!tap)
-			continue;
-
 		tap->idcode = idcode;
 
 		// ensure the TAP ID does matches what was expected
diff --git a/src/jtag/tcl.c b/src/jtag/tcl.c
index 04fca227..0368c4f8 100644
--- a/src/jtag/tcl.c
+++ b/src/jtag/tcl.c
@@ -358,14 +358,9 @@ static int jim_newtap_cmd(Jim_GetOptInfo *goi)
 static void jtag_tap_handle_event(jtag_tap_t *tap, enum jtag_event e)
 {
 	jtag_tap_event_action_t * jteap;
-	int done;
 
-	jteap = tap->event_action;
-
-	done = 0;
-	while (jteap) {
+	for (jteap = tap->event_action; jteap != NULL; jteap = jteap->next) {
 		if (jteap->event == e) {
-			done = 1;
 			LOG_DEBUG("JTAG tap: %s event: %d (%s) action: %s\n",
 					tap->dotted_name,
 					e,
@@ -386,14 +381,6 @@ static void jtag_tap_handle_event(jtag_tap_t *tap, enum jtag_event e)
 				break;
 			}
 		}
-
-		jteap = jteap->next;
-	}
-
-	if (!done) {
-		LOG_DEBUG("event %d %s - no action",
-				e,
-				Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e)->name);
 	}
 }
 
diff --git a/src/target/target.c b/src/target/target.c
index 16e36816..f0e9d8ee 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -3409,14 +3409,9 @@ void target_all_handle_event(enum target_event e)
 void target_handle_event(target_t *target, enum target_event e)
 {
 	target_event_action_t *teap;
-	int done;
 
-	teap = target->event_action;
-
-	done = 0;
-	while (teap) {
+	for (teap = target->event_action; teap != NULL; teap = teap->next) {
 		if (teap->event == e) {
-			done = 1;
 			LOG_DEBUG("target: (%d) %s (%s) event: %d (%s) action: %s",
 					   target->target_number,
 					   target->cmd_name,
@@ -3429,12 +3424,6 @@ void target_handle_event(target_t *target, enum target_event e)
 				Jim_PrintErrorMessage(interp);
 			}
 		}
-		teap = teap->next;
-	}
-	if (!done) {
-		LOG_DEBUG("event: %d %s - no action",
-				   e,
-				   Jim_Nvp_value2name_simple(nvp_target_event, e)->name);
 	}
 }