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 97179192e..6a314ece1 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 0bce8279e..16e36816b 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);
--
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