From 2d3bcddf0490620cb17089bdfe523eb547b41aa3 Mon Sep 17 00:00:00 2001
From: dbrownell <dbrownell@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Sat, 19 Sep 2009 06:49:40 +0000
Subject: [PATCH] Minor behavior fixes for the two JTAG reset events
 (C/internal, and Tcl/external):

 - Reorder so *both* paths (TCK/TMS or TRST) can enable TAPs with
   ICEpick ... first C code flags TAPs that got disabled, then call
   any Tcl code that might want to re-enable them.

 - Always call the C/internal handlers when JTAG operations can be
   issued; previously that wasn't done when TRST was used.

Plus some small cleanups (whitespace, strings, better messaging
during debug and on some errors) to reset-related code.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2730 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/jtag/core.c     | 26 ++++++++++++--------------
 src/target/target.c |  3 ++-
 2 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/src/jtag/core.c b/src/jtag/core.c
index 97179192e5..6a314ece1d 100644
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -446,7 +446,7 @@ void jtag_add_dr_scan(int in_num_fields, const scan_field_t *in_fields,
 		tap_state_t state)
 {
 	assert(state != TAP_RESET);
-	
+
 	jtag_prelude(state);
 
 	int retval;
@@ -458,7 +458,7 @@ void jtag_add_plain_dr_scan(int in_num_fields, const scan_field_t *in_fields,
 		tap_state_t state)
 {
 	assert(state != TAP_RESET);
-	
+
 	jtag_prelude(state);
 
 	int retval;
@@ -471,7 +471,6 @@ void jtag_add_dr_out(jtag_tap_t* tap,
 		tap_state_t end_state)
 {
 	assert(end_state != TAP_RESET);
-	
 	assert(end_state != TAP_INVALID);
 
 	cmd_queue_cur_state = end_state;
@@ -486,9 +485,9 @@ void jtag_add_tlr(void)
 	jtag_prelude(TAP_RESET);
 	jtag_set_error(interface_jtag_add_tlr());
 
-	jtag_notify_reset();
-
+	/* NOTE: order here matches TRST path in jtag_add_reset() */
 	jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
+	jtag_notify_reset();
 }
 
 void jtag_add_pathmove(int num_states, const tap_state_t *path)
@@ -684,21 +683,19 @@ void jtag_add_reset(int req_tlr_or_trst, int req_srst)
 	} else if (jtag_trst != new_trst) {
 		jtag_trst = new_trst;
 		if (jtag_trst) {
-			/* we just asserted nTRST, so we're now in TAP_RESET;
-			 * inform possible listeners about this
-			 *
-			 * REVISIT asserting TRST is less significant than
-			 * being in TAP_RESET ... both entries (TRST, TLR)
-			 * should trigger a callback.
-			 */
 			LOG_DEBUG("TRST line asserted");
 			tap_set_state(TAP_RESET);
-			jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 		} else {
 			LOG_DEBUG("TRST line released");
 			if (jtag_ntrst_delay)
 				jtag_add_sleep(jtag_ntrst_delay * 1000);
 
+			/* We just asserted nTRST, so we're now in TAP_RESET.
+			 * Inform possible listeners about this, now that
+			 * JTAG instructions and data can be shifted.  This
+			 * sequence must match jtag_add_tlr().
+			 */
+			jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 			jtag_notify_reset();
 		}
 	}
@@ -823,7 +820,8 @@ static int jtag_reset_callback(enum jtag_event event, void *priv)
 {
 	jtag_tap_t *tap = priv;
 
-	LOG_DEBUG("-");
+	LOG_DEBUG("TAP %s event %s", tap->dotted_name,
+			jtag_event_strings[event]);
 
 	if (event == JTAG_TRST_ASSERTED)
 	{
diff --git a/src/target/target.c b/src/target/target.c
index 0bce8279e2..16e36816b2 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -4028,7 +4028,8 @@ static int tcl_target_func(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 		break;
 	case TS_CMD_RESET:
 		if (goi.argc != 2) {
-			Jim_WrongNumArgs(interp, 2, argv, "t | f|assert | deassert BOOL");
+			Jim_WrongNumArgs(interp, 2, argv,
+					"([tT]|[fF]|assert|deassert) BOOL");
 			return JIM_ERR;
 		}
 		e = Jim_GetOpt_Nvp(&goi, nvp_assert, &n);
-- 
2.30.2