Add complete JTAG debug logging.

Sample output, with default_interface_jtag_execute_queue replaced by
dijeq to satisfy commit message line length check:
Debug: 646 18 core.c:847 dijeq(): JTAG IR SCAN to RUN/IDLE
Debug: 647 18 core.c:852 dijeq():   5b out: 11
Debug: 648 18 core.c:847 dijeq(): JTAG DR SCAN to RUN/IDLE
Debug: 649 18 core.c:852 dijeq():   40b out: 4400000001
Debug: 650 18 core.c:857 dijeq():   40b in: 4400000000

Signed-off-by: Tim Newsome <tim@sifive.com>
Change-Id: I014e9e3a77755413b36edfcede2ab8f6aa08061b
Reviewed-on: http://openocd.zylin.com/4451
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

diff --git a/src/jtag/core.c b/src/jtag/core.c
index 18956f24dbe3658cb49c7648beee6edb42dc6f94..144cf94f7d37582a63d6c190cc282ff71630613b 100644 (file)
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -836,7 +836,75 @@ int default_interface_jtag_execute_queue(void)
                return ERROR_FAIL;
        }
 
-       return jtag->execute_queue();
+       int result = jtag->execute_queue();
+
+#if !BUILD_ZY1000
+       /* Only build this if we use a regular driver with a command queue.
+        * Otherwise jtag_command_queue won't be found at compile/link time. Its
+        * definition is in jtag/commands.c, which is only built/linked by
+        * jtag/Makefile.am if MINIDRIVER_DUMMY || !MINIDRIVER, but those variables
+        * aren't accessible here. */
+       struct jtag_command *cmd = jtag_command_queue;
+       while (debug_level >= LOG_LVL_DEBUG && cmd) {
+               switch (cmd->type) {
+                       case JTAG_SCAN:
+                               LOG_DEBUG_IO("JTAG %s SCAN to %s",
+                                               cmd->cmd.scan->ir_scan ? "IR" : "DR",
+                                               tap_state_name(cmd->cmd.scan->end_state));
+                               for (int i = 0; i < cmd->cmd.scan->num_fields; i++) {
+                                       struct scan_field *field = cmd->cmd.scan->fields + i;
+                                       if (field->out_value) {
+                                               char *str = buf_to_str(field->out_value, field->num_bits, 16);
+                                               LOG_DEBUG_IO("  %db out: %s", field->num_bits, str);
+                                               free(str);
+                                       }
+                                       if (field->in_value) {
+                                               char *str = buf_to_str(field->in_value, field->num_bits, 16);
+                                               LOG_DEBUG_IO("  %db  in: %s", field->num_bits, str);
+                                               free(str);
+                                       }
+                               }
+                               break;
+                       case JTAG_TLR_RESET:
+                               LOG_DEBUG_IO("JTAG TLR RESET to %s",
+                                               tap_state_name(cmd->cmd.statemove->end_state));
+                               break;
+                       case JTAG_RUNTEST:
+                               LOG_DEBUG_IO("JTAG RUNTEST %d cycles to %s",
+                                               cmd->cmd.runtest->num_cycles,
+                                               tap_state_name(cmd->cmd.runtest->end_state));
+                               break;
+                       case JTAG_RESET:
+                               {
+                                       const char *reset_str[3] = {
+                                               "leave", "deassert", "assert"
+                                       };
+                                       LOG_DEBUG_IO("JTAG RESET %s TRST, %s SRST",
+                                                       reset_str[cmd->cmd.reset->trst + 1],
+                                                       reset_str[cmd->cmd.reset->srst + 1]);
+                               }
+                               break;
+                       case JTAG_PATHMOVE:
+                               LOG_DEBUG_IO("JTAG PATHMOVE (TODO)");
+                               break;
+                       case JTAG_SLEEP:
+                               LOG_DEBUG_IO("JTAG SLEEP (TODO)");
+                               break;
+                       case JTAG_STABLECLOCKS:
+                               LOG_DEBUG_IO("JTAG STABLECLOCKS (TODO)");
+                               break;
+                       case JTAG_TMS:
+                               LOG_DEBUG_IO("JTAG TMS (TODO)");
+                               break;
+                       default:
+                               LOG_ERROR("Unknown JTAG command: %d", cmd->type);
+                               break;
+               }
+               cmd = cmd->next;
+       }
+#endif
+
+       return result;
 }
 
 void jtag_execute_queue_noclear(void)
@@ -1107,7 +1175,8 @@ static int jtag_examine_chain(void)
 
                if ((idcode & 1) == 0) {
                        /* Zero for LSB indicates a device in bypass */
-                       LOG_INFO("TAP %s does not have IDCODE", tap->dotted_name);
+                       LOG_INFO("TAP %s does not have valid IDCODE (idcode=0x%x)",
+                                       tap->dotted_name, idcode);
                        tap->hasidcode = false;
                        tap->idcode = 0;