From 3a4896182036eb472a06f66be3710d5c228b6748 Mon Sep 17 00:00:00 2001
From: oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Tue, 5 Aug 2008 06:18:26 +0000
Subject: moves handling of problems with resetting into the halted state into
 the target implementation.

Also target_process_reset() is now simpler and has error handling,
e.g. if assert reset fails, then target_process_reset() will propagate
that error.

cmd_ctx was passed in to examine(), which is wrong - removed that.

git-svn-id: svn://svn.berlios.de/openocd/trunk@887 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/target/target.c | 44 +++++++++++++++-----------------------------
 1 file changed, 15 insertions(+), 29 deletions(-)

(limited to 'src/target/target.c')

diff --git a/src/target/target.c b/src/target/target.c
index 02016e77..5bd16622 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -290,7 +290,7 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
 	 *
 	 * For the "reset halt/init" case we must only set up the registers here.
 	 */
-	if ((retval = target_examine(cmd_ctx)) != ERROR_OK)
+	if ((retval = target_examine()) != ERROR_OK)
 		return retval;
 
 	keep_alive(); /* we might be running on a very slow JTAG clk */
@@ -303,14 +303,10 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
 		 */
 		target_free_all_working_areas_restore(target, 0);
 		target->reset_halt=((reset_mode==RESET_HALT)||(reset_mode==RESET_INIT));
-		target->type->assert_reset(target);
+		if ((retval = target->type->assert_reset(target))!=ERROR_OK)
+			return retval;
 		target = target->next;
 	}
-	if ((retval = jtag_execute_queue()) != ERROR_OK)
-	{
-		LOG_WARNING("JTAG communication failed asserting reset.");
-		retval = ERROR_OK;
-	}
 
 	/* request target halt if necessary, and schedule further action */
 	target = targets;
@@ -318,23 +314,24 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
 	{
 		if (reset_mode!=RESET_RUN)
 		{
-			if ((jtag_reset_config & RESET_SRST_PULLS_TRST)==0)
-				target_halt(target);
+			if ((retval = target_halt(target))!=ERROR_OK)
+				return retval;
 		}
 		target = target->next;
 	}
 
-	if ((retval = jtag_execute_queue()) != ERROR_OK)
+	target = targets;
+	while (target)
 	{
-		LOG_WARNING("JTAG communication failed while reset was asserted. Consider using srst_only for reset_config.");
-		retval = ERROR_OK;
+		if ((retval = target->type->deassert_reset(target))!=ERROR_OK)
+			return retval;
+		target = target->next;
 	}
 
 	target = targets;
 	while (target)
 	{
-		target->type->deassert_reset(target);
-		/* We can fail to bring the target into the halted state  */
+		/* We can fail to bring the target into the halted state, try after reset has been deasserted  */
 		if (target->reset_halt)
 		{
 			/* wait up to 1 second for halt. */
@@ -342,25 +339,14 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
 			if (target->state != TARGET_HALTED)
 			{
 				LOG_WARNING("Failed to reset target into halted mode - issuing halt");
-				target->type->halt(target);
+				if ((retval = target->type->halt(target))!=ERROR_OK)
+					return retval;
 			}
 		}
 
 		target = target->next;
 	}
 
-	if ((retval = jtag_execute_queue()) != ERROR_OK)
-	{
-		LOG_WARNING("JTAG communication failed while deasserting reset.");
-		retval = ERROR_OK;
-	}
-
-	if (jtag_reset_config & RESET_SRST_PULLS_TRST)
-	{
-		/* If TRST was asserted we need to set up registers again */
-		if ((retval = target_examine(cmd_ctx)) != ERROR_OK)
-			return retval;
-	}
 
 	LOG_DEBUG("Waiting for halted stated as appropriate");
 
@@ -397,7 +383,7 @@ static int default_mmu(struct target_s *target, int *enabled)
 	return ERROR_OK;
 }
 
-static int default_examine(struct command_context_s *cmd_ctx, struct target_s *target)
+static int default_examine(struct target_s *target)
 {
 	target->type->examined = 1;
 	return ERROR_OK;
@@ -415,7 +401,7 @@ int target_examine(struct command_context_s *cmd_ctx)
 	target_t *target = targets;
 	while (target)
 	{
-		if ((retval = target->type->examine(cmd_ctx, target))!=ERROR_OK)
+		if ((retval = target->type->examine(target))!=ERROR_OK)
 			return retval;
 		target = target->next;
 	}
-- 
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