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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2009 SoftPLC Corporation                                *
   9  *       http://softplc.com                                                *
  10  *   dick@softplc.com                                                      *
  11  *                                                                         *
  12  *   Copyright (C) 2009 Zachary T Welch                                    *
  13  *   zw@superlucidity.net                                                  *
  14  *                                                                         *
  15  *   This program is free software; you can redistribute it and/or modify  *
  16  *   it under the terms of the GNU General Public License as published by  *
  17  *   the Free Software Foundation; either version 2 of the License, or     *
  18  *   (at your option) any later version.                                   *
  19  *                                                                         *
  20  *   This program is distributed in the hope that it will be useful,       *
  21  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  22  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  23  *   GNU General Public License for more details.                          *
  24  *                                                                         *
  25  *   You should have received a copy of the GNU General Public License     *
  26  *   along with this program; if not, write to the                         *
  27  *   Free Software Foundation, Inc.,                                       *
  28  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  29  ***************************************************************************/
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #include "jtag.h"
  35 #include "minidriver.h"
  36 #include "interface.h"
  37 #include "interfaces.h"
  38
  39 #ifdef HAVE_STRINGS_H
  40 #include <strings.h>
  41 #endif
  42
  43 static const Jim_Nvp nvp_jtag_tap_event[] = {
  44         { .value = JTAG_TAP_EVENT_POST_RESET,   .name = "post-reset" },
  45         { .value = JTAG_TAP_EVENT_ENABLE,       .name = "tap-enable" },
  46         { .value = JTAG_TAP_EVENT_DISABLE,      .name = "tap-disable" },
  47
  48         { .name = NULL, .value = -1 }
  49 };
  50
  51 extern jtag_interface_t *jtag_interface;
  52
  53 /* jtag commands */
  54 static int handle_interface_list_command(struct command_context_s *cmd_ctx,
  55                 char *cmd, char **args, int argc);
  56 static int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  57 static int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  58 static int handle_jtag_khz_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  59 static int handle_jtag_rclk_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  60 static int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  61 static int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  62 static int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  63 static int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  64
  65 static int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  66
  67 static int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  68 static int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  69 static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  70 static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
  71 static int Jim_Command_pathmove(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
  72 static int Jim_Command_flush_count(Jim_Interp *interp, int argc, Jim_Obj *const *args);
  73
  74 static int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  75 static int handle_verify_jtag_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  76 static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  77
  78 extern int jtag_examine_chain(void);
  79 extern int jtag_validate_chain(void);
  80
  81 enum jtag_tap_cfg_param {
  82         JCFG_EVENT
  83 };
  84
  85 static Jim_Nvp nvp_config_opts[] = {
  86         { .name = "-event",      .value = JCFG_EVENT },
  87
  88         { .name = NULL,          .value = -1 }
  89 };
  90
  91 static int jtag_tap_configure_cmd(Jim_GetOptInfo *goi, jtag_tap_t * tap)
  92 {
  93         Jim_Nvp *n;
  94         Jim_Obj *o;
  95         int e;
  96
  97         /* parse config or cget options */
  98         while (goi->argc > 0) {
  99                 Jim_SetEmptyResult (goi->interp);
 100
 101                 e = Jim_GetOpt_Nvp(goi, nvp_config_opts, &n);
 102                 if (e != JIM_OK) {
 103                         Jim_GetOpt_NvpUnknown(goi, nvp_config_opts, 0);
 104                         return e;
 105                 }
 106
 107                 switch (n->value) {
 108                         case JCFG_EVENT:
 109                                 if (goi->argc == 0) {
 110                                         Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name? ...");
 111                                         return JIM_ERR;
 112                                 }
 113
 114                                 e = Jim_GetOpt_Nvp(goi, nvp_jtag_tap_event, &n);
 115                                 if (e != JIM_OK) {
 116                                         Jim_GetOpt_NvpUnknown(goi, nvp_jtag_tap_event, 1);
 117                                         return e;
 118                                 }
 119
 120                                 if (goi->isconfigure) {
 121                                         if (goi->argc != 1) {
 122                                                 Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name? ?EVENT-BODY?");
 123                                                 return JIM_ERR;
 124                                         }
 125                                 } else {
 126                                         if (goi->argc != 0) {
 127                                                 Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name?");
 128                                                 return JIM_ERR;
 129                                         }
 130                                 }
 131
 132                                 {
 133                                         jtag_tap_event_action_t *jteap;
 134
 135                                         jteap = tap->event_action;
 136                                         /* replace existing? */
 137                                         while (jteap) {
 138                                                 if (jteap->event == (enum jtag_event)n->value) {
 139                                                         break;
 140                                                 }
 141                                                 jteap = jteap->next;
 142                                         }
 143
 144                                         if (goi->isconfigure) {
 145                                                 bool replace = true;
 146                                                 if (jteap == NULL) {
 147                                                         /* create new */
 148                                                         jteap = calloc(1, sizeof (*jteap));
 149                                                         replace = false;
 150                                                 }
 151                                                 jteap->event = n->value;
 152                                                 Jim_GetOpt_Obj(goi, &o);
 153                                                 if (jteap->body) {
 154                                                         Jim_DecrRefCount(interp, jteap->body);
 155                                                 }
 156                                                 jteap->body = Jim_DuplicateObj(goi->interp, o);
 157                                                 Jim_IncrRefCount(jteap->body);
 158
 159                                                 if (!replace)
 160                                                 {
 161                                                         /* add to head of event list */
 162                                                         jteap->next = tap->event_action;
 163                                                         tap->event_action = jteap;
 164                                                 }
 165                                                 Jim_SetEmptyResult(goi->interp);
 166                                         } else {
 167                                                 /* get */
 168                                                 if (jteap == NULL) {
 169                                                         Jim_SetEmptyResult(goi->interp);
 170                                                 } else {
 171                                                         Jim_SetResult(goi->interp, Jim_DuplicateObj(goi->interp, jteap->body));
 172                                                 }
 173                                         }
 174                                 }
 175                                 /* loop for more */
 176                                 break;
 177                 }
 178         } /* while (goi->argc) */
 179
 180         return JIM_OK;
 181 }
 182
 183 static int is_bad_irval(int ir_length, jim_wide w)
 184 {
 185         jim_wide v = 1;
 186
 187         v <<= ir_length;
 188         v -= 1;
 189         v = ~v;
 190         return (w & v) != 0;
 191 }
 192
 193 static int jim_newtap_cmd(Jim_GetOptInfo *goi)
 194 {
 195         jtag_tap_t *pTap;
 196         jim_wide w;
 197         int x;
 198         int e;
 199         int reqbits;
 200         Jim_Nvp *n;
 201         char *cp;
 202         const Jim_Nvp opts[] = {
 203 #define NTAP_OPT_IRLEN     0
 204                 { .name = "-irlen"                      ,       .value = NTAP_OPT_IRLEN },
 205 #define NTAP_OPT_IRMASK    1
 206                 { .name = "-irmask"                     ,       .value = NTAP_OPT_IRMASK },
 207 #define NTAP_OPT_IRCAPTURE 2
 208                 { .name = "-ircapture"          ,       .value = NTAP_OPT_IRCAPTURE },
 209 #define NTAP_OPT_ENABLED   3
 210                 { .name = "-enable"                     ,       .value = NTAP_OPT_ENABLED },
 211 #define NTAP_OPT_DISABLED  4
 212                 { .name = "-disable"            ,       .value = NTAP_OPT_DISABLED },
 213 #define NTAP_OPT_EXPECTED_ID 5
 214                 { .name = "-expected-id"        ,       .value = NTAP_OPT_EXPECTED_ID },
 215                 { .name = NULL                          ,       .value = -1 },
 216         };
 217
 218         pTap = calloc(1, sizeof(jtag_tap_t));
 219         if (!pTap) {
 220                 Jim_SetResult_sprintf(goi->interp, "no memory");
 221                 return JIM_ERR;
 222         }
 223
 224         /*
 225          * we expect CHIP + TAP + OPTIONS
 226          * */
 227         if (goi->argc < 3) {
 228                 Jim_SetResult_sprintf(goi->interp, "Missing CHIP TAP OPTIONS ....");
 229                 free(pTap);
 230                 return JIM_ERR;
 231         }
 232         Jim_GetOpt_String(goi, &cp, NULL);
 233         pTap->chip = strdup(cp);
 234
 235         Jim_GetOpt_String(goi, &cp, NULL);
 236         pTap->tapname = strdup(cp);
 237
 238         /* name + dot + name + null */
 239         x = strlen(pTap->chip) + 1 + strlen(pTap->tapname) + 1;
 240         cp = malloc(x);
 241         sprintf(cp, "%s.%s", pTap->chip, pTap->tapname);
 242         pTap->dotted_name = cp;
 243
 244         LOG_DEBUG("Creating New Tap, Chip: %s, Tap: %s, Dotted: %s, %d params",
 245                           pTap->chip, pTap->tapname, pTap->dotted_name, goi->argc);
 246
 247         /* deal with options */
 248 #define NTREQ_IRLEN      1
 249 #define NTREQ_IRCAPTURE  2
 250 #define NTREQ_IRMASK     4
 251
 252         /* clear them as we find them */
 253         reqbits = (NTREQ_IRLEN | NTREQ_IRCAPTURE | NTREQ_IRMASK);
 254
 255         while (goi->argc) {
 256                 e = Jim_GetOpt_Nvp(goi, opts, &n);
 257                 if (e != JIM_OK) {
 258                         Jim_GetOpt_NvpUnknown(goi, opts, 0);
 259                         free((void *)pTap->dotted_name);
 260                         free(pTap);
 261                         return e;
 262                 }
 263                 LOG_DEBUG("Processing option: %s", n->name);
 264                 switch (n->value) {
 265                 case NTAP_OPT_ENABLED:
 266                         pTap->disabled_after_reset = false;
 267                         break;
 268                 case NTAP_OPT_DISABLED:
 269                         pTap->disabled_after_reset = true;
 270                         break;
 271                 case NTAP_OPT_EXPECTED_ID:
 272                 {
 273                         uint32_t *new_expected_ids;
 274
 275                         e = Jim_GetOpt_Wide(goi, &w);
 276                         if (e != JIM_OK) {
 277                                 Jim_SetResult_sprintf(goi->interp, "option: %s bad parameter", n->name);
 278                                 free((void *)pTap->dotted_name);
 279                                 free(pTap);
 280                                 return e;
 281                         }
 282
 283                         new_expected_ids = malloc(sizeof(uint32_t) * (pTap->expected_ids_cnt + 1));
 284                         if (new_expected_ids == NULL) {
 285                                 Jim_SetResult_sprintf(goi->interp, "no memory");
 286                                 free((void *)pTap->dotted_name);
 287                                 free(pTap);
 288                                 return JIM_ERR;
 289                         }
 290
 291                         memcpy(new_expected_ids, pTap->expected_ids, sizeof(uint32_t) * pTap->expected_ids_cnt);
 292
 293                         new_expected_ids[pTap->expected_ids_cnt] = w;
 294
 295                         free(pTap->expected_ids);
 296                         pTap->expected_ids = new_expected_ids;
 297                         pTap->expected_ids_cnt++;
 298                         break;
 299                 }
 300                 case NTAP_OPT_IRLEN:
 301                 case NTAP_OPT_IRMASK:
 302                 case NTAP_OPT_IRCAPTURE:
 303                         e = Jim_GetOpt_Wide(goi, &w);
 304                         if (e != JIM_OK) {
 305                                 Jim_SetResult_sprintf(goi->interp, "option: %s bad parameter", n->name);
 306                                 free((void *)pTap->dotted_name);
 307                                 free(pTap);
 308                                 return e;
 309                         }
 310                         switch (n->value) {
 311                         case NTAP_OPT_IRLEN:
 312                                 if (w > (jim_wide) (8 * sizeof(pTap->ir_capture_value)))
 313                                         LOG_WARNING("huge IR length %d", (int) w);
 314                                 pTap->ir_length = w;
 315                                 reqbits &= (~(NTREQ_IRLEN));
 316                                 break;
 317                         case NTAP_OPT_IRMASK:
 318                                 if (is_bad_irval(pTap->ir_length, w)) {
 319                                         LOG_ERROR("IR mask %x too big",
 320                                                         (int) w);
 321                                         free((void *)pTap->dotted_name);
 322                                         free(pTap);
 323                                         return ERROR_FAIL;
 324                                 }
 325                                 pTap->ir_capture_mask = w;
 326                                 reqbits &= (~(NTREQ_IRMASK));
 327                                 break;
 328                         case NTAP_OPT_IRCAPTURE:
 329                                 if (is_bad_irval(pTap->ir_length, w)) {
 330                                         LOG_ERROR("IR capture %x too big",
 331                                                         (int) w);
 332                                         free((void *)pTap->dotted_name);
 333                                         free(pTap);
 334                                         return ERROR_FAIL;
 335                                 }
 336                                 pTap->ir_capture_value = w;
 337                                 reqbits &= (~(NTREQ_IRCAPTURE));
 338                                 break;
 339                         }
 340                 } /* switch (n->value) */
 341         } /* while (goi->argc) */
 342
 343         /* default is enabled-after-reset */
 344         pTap->enabled = !pTap->disabled_after_reset;
 345
 346         /* Did all the required option bits get cleared? */
 347         if (0 == reqbits)
 348         {
 349                 jtag_tap_init(pTap);
 350                 return ERROR_OK;
 351         }
 352
 353         Jim_SetResult_sprintf(goi->interp,
 354                         "newtap: %s missing required parameters",
 355                         pTap->dotted_name);
 356         jtag_tap_free(pTap);
 357         return JIM_ERR;
 358 }
 359
 360 static void jtag_tap_handle_event(jtag_tap_t *tap, enum jtag_event e)
 361 {
 362         jtag_tap_event_action_t * jteap;
 363         int done;
 364
 365         jteap = tap->event_action;
 366
 367         done = 0;
 368         while (jteap) {
 369                 if (jteap->event == e) {
 370                         done = 1;
 371                         LOG_DEBUG("JTAG tap: %s event: %d (%s) action: %s\n",
 372                                         tap->dotted_name,
 373                                         e,
 374                                         Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e)->name,
 375                                         Jim_GetString(jteap->body, NULL));
 376                         if (Jim_EvalObj(interp, jteap->body) != JIM_OK) {
 377                                 Jim_PrintErrorMessage(interp);
 378                         } else {
 379                                 /* NOTE:  we currently assume the handlers
 380                                  * can't fail.  That presumes later code
 381                                  * will be verifying the scan chains ...
 382                                  */
 383                                 if (e == JTAG_TAP_EVENT_ENABLE)
 384                                         tap->enabled = true;
 385                         }
 386                 }
 387
 388                 jteap = jteap->next;
 389         }
 390
 391         if (!done) {
 392                 LOG_DEBUG("event %d %s - no action",
 393                                 e,
 394                                 Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e)->name);
 395         }
 396 }
 397
 398
 399 static int jim_jtag_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 400 {
 401         Jim_GetOptInfo goi;
 402         int e;
 403         Jim_Nvp *n;
 404         Jim_Obj *o;
 405         struct command_context_s *context;
 406
 407         enum {
 408                 JTAG_CMD_INTERFACE,
 409                 JTAG_CMD_INIT_RESET,
 410                 JTAG_CMD_NEWTAP,
 411                 JTAG_CMD_TAPENABLE,
 412                 JTAG_CMD_TAPDISABLE,
 413                 JTAG_CMD_TAPISENABLED,
 414                 JTAG_CMD_CONFIGURE,
 415                 JTAG_CMD_CGET,
 416                 JTAG_CMD_NAMES,
 417         };
 418
 419         const Jim_Nvp jtag_cmds[] = {
 420                 { .name = "interface"     , .value = JTAG_CMD_INTERFACE },
 421                 { .name = "arp_init-reset", .value = JTAG_CMD_INIT_RESET },
 422                 { .name = "newtap"        , .value = JTAG_CMD_NEWTAP },
 423                 { .name = "tapisenabled"     , .value = JTAG_CMD_TAPISENABLED },
 424                 { .name = "tapenable"     , .value = JTAG_CMD_TAPENABLE },
 425                 { .name = "tapdisable"    , .value = JTAG_CMD_TAPDISABLE },
 426                 { .name = "configure"     , .value = JTAG_CMD_CONFIGURE },
 427                 { .name = "cget"          , .value = JTAG_CMD_CGET },
 428                 { .name = "names"         , .value = JTAG_CMD_NAMES },
 429
 430                 { .name = NULL, .value = -1 },
 431         };
 432
 433         context = Jim_GetAssocData(interp, "context");
 434         /* go past the command */
 435         Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
 436
 437         e = Jim_GetOpt_Nvp(&goi, jtag_cmds, &n);
 438         if (e != JIM_OK) {
 439                 Jim_GetOpt_NvpUnknown(&goi, jtag_cmds, 0);
 440                 return e;
 441         }
 442                 Jim_SetEmptyResult(goi.interp);
 443         switch (n->value) {
 444         case JTAG_CMD_INTERFACE:
 445                 /* return the name of the interface */
 446                 /* TCL code might need to know the exact type... */
 447                 /* FUTURE: we allow this as a means to "set" the interface. */
 448                 if (goi.argc != 0) {
 449                         Jim_WrongNumArgs(goi.interp, 1, goi.argv-1, "(no params)");
 450                         return JIM_ERR;
 451                 }
 452                 Jim_SetResultString(goi.interp, jtag_interface->name, -1);
 453                 return JIM_OK;
 454         case JTAG_CMD_INIT_RESET:
 455                 if (goi.argc != 0) {
 456                         Jim_WrongNumArgs(goi.interp, 1, goi.argv-1, "(no params)");
 457                         return JIM_ERR;
 458                 }
 459                 e = jtag_init_reset(context);
 460                 if (e != ERROR_OK) {
 461                         Jim_SetResult_sprintf(goi.interp, "error: %d", e);
 462                         return JIM_ERR;
 463                 }
 464                 return JIM_OK;
 465         case JTAG_CMD_NEWTAP:
 466                 return jim_newtap_cmd(&goi);
 467                 break;
 468         case JTAG_CMD_TAPISENABLED:
 469         case JTAG_CMD_TAPENABLE:
 470         case JTAG_CMD_TAPDISABLE:
 471                 if (goi.argc != 1) {
 472                         Jim_SetResultString(goi.interp, "Too many parameters",-1);
 473                         return JIM_ERR;
 474                 }
 475
 476                 {
 477                         jtag_tap_t *t;
 478
 479                         t = jtag_tap_by_jim_obj(goi.interp, goi.argv[0]);
 480                         if (t == NULL)
 481                                 return JIM_ERR;
 482
 483                         switch (n->value) {
 484                         case JTAG_CMD_TAPISENABLED:
 485                                 break;
 486                         case JTAG_CMD_TAPENABLE:
 487                                 if (t->enabled)
 488                                         break;
 489                                 jtag_tap_handle_event(t, JTAG_TAP_EVENT_ENABLE);
 490                                 if (!t->enabled)
 491                                         break;
 492
 493                                 /* FIXME add JTAG sanity checks, w/o TLR
 494                                  *  - scan chain length grew by one (this)
 495                                  *  - IDs and IR lengths are as expected
 496                                  */
 497
 498                                 jtag_call_event_callbacks(JTAG_TAP_EVENT_ENABLE);
 499                                 break;
 500                         case JTAG_CMD_TAPDISABLE:
 501                                 if (!t->enabled)
 502                                         break;
 503                                 jtag_tap_handle_event(t, JTAG_TAP_EVENT_DISABLE);
 504                                 if (t->enabled)
 505                                         break;
 506
 507                                 /* FIXME add JTAG sanity checks, w/o TLR
 508                                  *  - scan chain length shrank by one (this)
 509                                  *  - IDs and IR lengths are as expected
 510                                  */
 511
 512                                 jtag_call_event_callbacks(JTAG_TAP_EVENT_DISABLE);
 513                                 break;
 514                         }
 515                         e = t->enabled;
 516                         Jim_SetResult(goi.interp, Jim_NewIntObj(goi.interp, e));
 517                         return JIM_OK;
 518                 }
 519                 break;
 520
 521         case JTAG_CMD_CGET:
 522                 if (goi.argc < 2) {
 523                         Jim_WrongNumArgs(goi.interp, 0, NULL,
 524                                         "cget tap_name queryparm");
 525                         return JIM_ERR;
 526                 }
 527
 528                 {
 529                         jtag_tap_t *t;
 530
 531                         Jim_GetOpt_Obj(&goi, &o);
 532                         t = jtag_tap_by_jim_obj(goi.interp, o);
 533                         if (t == NULL) {
 534                                 return JIM_ERR;
 535                         }
 536
 537                         goi.isconfigure = 0;
 538                         return jtag_tap_configure_cmd(&goi, t);
 539                 }
 540                 break;
 541
 542         case JTAG_CMD_CONFIGURE:
 543                 if (goi.argc < 3) {
 544                         Jim_WrongNumArgs(goi.interp, 0, NULL,
 545                                         "configure tap_name attribute value ...");
 546                         return JIM_ERR;
 547                 }
 548
 549                 {
 550                         jtag_tap_t *t;
 551
 552                         Jim_GetOpt_Obj(&goi, &o);
 553                         t = jtag_tap_by_jim_obj(goi.interp, o);
 554                         if (t == NULL) {
 555                                 return JIM_ERR;
 556                         }
 557
 558                         goi.isconfigure = 1;
 559                         return jtag_tap_configure_cmd(&goi, t);
 560                 }
 561                 break;
 562
 563         case JTAG_CMD_NAMES:
 564                 if (goi.argc != 0) {
 565                         Jim_WrongNumArgs(goi.interp, 1, goi.argv, "Too many parameters");
 566                         return JIM_ERR;
 567                 }
 568                 Jim_SetResult(goi.interp, Jim_NewListObj(goi.interp, NULL, 0));
 569                 {
 570                         jtag_tap_t *tap;
 571
 572                         for (tap = jtag_all_taps(); tap; tap = tap->next_tap) {
 573                                 Jim_ListAppendElement(goi.interp,
 574                                         Jim_GetResult(goi.interp),
 575                                         Jim_NewStringObj(goi.interp,
 576                                                 tap->dotted_name, -1));
 577                         }
 578                         return JIM_OK;
 579                 }
 580                 break;
 581
 582         }
 583
 584         return JIM_ERR;
 585 }
 586
 587
 588 void jtag_notify_reset(void)
 589 {
 590         jtag_tap_t *tap;
 591         for (tap = jtag_all_taps(); tap; tap = tap->next_tap)
 592         {
 593                 jtag_tap_handle_event(tap, JTAG_TAP_EVENT_POST_RESET);
 594         }
 595 }
 596
 597
 598 int jtag_register_commands(struct command_context_s *cmd_ctx)
 599 {
 600         register_jim(cmd_ctx, "jtag", jim_jtag_command, "perform jtag tap actions");
 601
 602         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
 603                 COMMAND_CONFIG, "try to configure interface");
 604         register_command(cmd_ctx, NULL,
 605                 "interface_list", &handle_interface_list_command,
 606                 COMMAND_ANY, "list all built-in interfaces");
 607         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
 608                 COMMAND_ANY, "(DEPRECATED) set jtag speed (if supported)");
 609         register_command(cmd_ctx, NULL, "jtag_khz", handle_jtag_khz_command,
 610                 COMMAND_ANY, "set maximum jtag speed (if supported); "
 611                 "parameter is maximum khz, or 0 for adaptive clocking (RTCK).");
 612         register_command(cmd_ctx, NULL, "jtag_rclk", handle_jtag_rclk_command,
 613                 COMMAND_ANY, "fallback_speed_khz - set JTAG speed to RCLK or use fallback speed");
 614         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
 615                 COMMAND_CONFIG, "(DEPRECATED) jtag_device <ir_length> <ir_expected> <ir_mask>");
 616         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
 617                 COMMAND_ANY,
 618                 "[none/trst_only/srst_only/trst_and_srst] [srst_pulls_trst/trst_pulls_srst] [combined/separate] [trst_push_pull/trst_open_drain] [srst_push_pull/srst_open_drain]");
 619         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
 620                 COMMAND_ANY, "jtag_nsrst_delay <ms> - delay after deasserting srst in ms");
 621         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
 622                 COMMAND_ANY, "jtag_ntrst_delay <ms> - delay after deasserting trst in ms");
 623
 624         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
 625                 COMMAND_EXEC, "print current scan chain configuration");
 626
 627         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
 628                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
 629         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
 630                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
 631         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
 632                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
 633         register_jim(cmd_ctx, "drscan", Jim_Command_drscan, "execute DR scan <device> <num_bits> <value> <num_bits1> <value2> ...");
 634         register_jim(cmd_ctx, "flush_count", Jim_Command_flush_count, "returns number of times the JTAG queue has been flushed");
 635         register_jim(cmd_ctx, "pathmove", Jim_Command_pathmove, "move JTAG to state1 then to state2, state3, etc. <state1>,<state2>,<stat3>...");
 636
 637         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
 638                 COMMAND_ANY, "verify value captured during Capture-IR <enable | disable>");
 639         register_command(cmd_ctx, NULL, "verify_jtag", handle_verify_jtag_command,
 640                 COMMAND_ANY, "verify value capture <enable | disable>");
 641         register_command(cmd_ctx, NULL, "tms_sequence", handle_tms_sequence_command,
 642                 COMMAND_ANY, "choose short(default) or long tms_sequence <short | long>");
 643         return ERROR_OK;
 644 }
 645
 646 static int default_khz(int khz, int *jtag_speed)
 647 {
 648         LOG_ERROR("Translation from khz to jtag_speed not implemented");
 649         return ERROR_FAIL;
 650 }
 651
 652 static int default_speed_div(int speed, int *khz)
 653 {
 654         LOG_ERROR("Translation from jtag_speed to khz not implemented");
 655         return ERROR_FAIL;
 656 }
 657
 658 static int default_power_dropout(int *dropout)
 659 {
 660         *dropout = 0; /* by default we can't detect power dropout */
 661         return ERROR_OK;
 662 }
 663
 664 static int default_srst_asserted(int *srst_asserted)
 665 {
 666         *srst_asserted = 0; /* by default we can't detect srst asserted */
 667         return ERROR_OK;
 668 }
 669
 670 static int handle_interface_command(struct command_context_s *cmd_ctx,
 671                 char *cmd, char **args, int argc)
 672 {
 673         /* check whether the interface is already configured */
 674         if (jtag_interface)
 675         {
 676                 LOG_WARNING("Interface already configured, ignoring");
 677                 return ERROR_OK;
 678         }
 679
 680         /* interface name is a mandatory argument */
 681         if (argc != 1 || args[0][0] == '\0')
 682                 return ERROR_COMMAND_SYNTAX_ERROR;
 683
 684         for (unsigned i = 0; NULL != jtag_interfaces[i]; i++)
 685         {
 686                 if (strcmp(args[0], jtag_interfaces[i]->name) != 0)
 687                         continue;
 688
 689                 int retval = jtag_interfaces[i]->register_commands(cmd_ctx);
 690                 if (ERROR_OK != retval)
 691                                 return retval;
 692
 693                 jtag_interface = jtag_interfaces[i];
 694
 695                 if (jtag_interface->khz == NULL)
 696                         jtag_interface->khz = default_khz;
 697                 if (jtag_interface->speed_div == NULL)
 698                         jtag_interface->speed_div = default_speed_div;
 699                 if (jtag_interface->power_dropout == NULL)
 700                         jtag_interface->power_dropout = default_power_dropout;
 701                 if (jtag_interface->srst_asserted == NULL)
 702                         jtag_interface->srst_asserted = default_srst_asserted;
 703
 704                 return ERROR_OK;
 705         }
 706
 707         /* no valid interface was found (i.e. the configuration option,
 708          * didn't match one of the compiled-in interfaces
 709          */
 710         LOG_ERROR("The specified JTAG interface was not found (%s)", args[0]);
 711         handle_interface_list_command(cmd_ctx, cmd, args, argc);
 712         return ERROR_JTAG_INVALID_INTERFACE;
 713 }
 714
 715 static int handle_interface_list_command(struct command_context_s *cmd_ctx,
 716                 char *cmd, char **args, int argc)
 717 {
 718         if (strcmp(cmd, "interface_list") == 0 && argc > 0)
 719                 return ERROR_COMMAND_SYNTAX_ERROR;
 720
 721         command_print(cmd_ctx, "The following JTAG interfaces are available:");
 722         for (unsigned i = 0; NULL != jtag_interfaces[i]; i++)
 723         {
 724                 const char *name = jtag_interfaces[i]->name;
 725                 command_print(cmd_ctx, "%u: %s", i + 1, name);
 726         }
 727
 728         return ERROR_OK;
 729 }
 730
 731 static int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 732 {
 733         int e;
 734         char buf[1024];
 735         Jim_Obj *newargs[ 10 ];
 736         /*
 737          * CONVERT SYNTAX
 738          * argv[-1] = command
 739          * argv[ 0] = ir length
 740          * argv[ 1] = ir capture
 741          * argv[ 2] = ir mask
 742          * argv[ 3] = not actually used by anything but in the docs
 743          */
 744
 745         if (argc < 4) {
 746                 command_print(cmd_ctx, "OLD DEPRECATED SYNTAX: Please use the NEW syntax");
 747                 return ERROR_OK;
 748         }
 749         command_print(cmd_ctx, "OLD SYNTAX: DEPRECATED - translating to new syntax");
 750         command_print(cmd_ctx, "jtag newtap CHIP TAP -irlen %s -ircapture %s -irvalue %s",
 751                                    args[0],
 752                                    args[1],
 753                                    args[2]);
 754         command_print(cmd_ctx, "Example: STM32 has 2 taps, the cortexM3(len4) + boundaryscan(len5)");
 755         command_print(cmd_ctx, "jtag newtap stm32 cortexm3 ....., thus creating the tap: \"stm32.cortexm3\"");
 756         command_print(cmd_ctx, "jtag newtap stm32 boundary ....., and the tap: \"stm32.boundary\"");
 757         command_print(cmd_ctx, "And then refer to the taps by the dotted name.");
 758
 759         newargs[0] = Jim_NewStringObj(interp, "jtag", -1);
 760         newargs[1] = Jim_NewStringObj(interp, "newtap", -1);
 761         sprintf(buf, "chip%d", jtag_tap_count());
 762         newargs[2] = Jim_NewStringObj(interp, buf, -1);
 763         sprintf(buf, "tap%d", jtag_tap_count());
 764         newargs[3] = Jim_NewStringObj(interp, buf, -1);
 765         newargs[4] = Jim_NewStringObj(interp, "-irlen", -1);
 766         newargs[5] = Jim_NewStringObj(interp, args[0], -1);
 767         newargs[6] = Jim_NewStringObj(interp, "-ircapture", -1);
 768         newargs[7] = Jim_NewStringObj(interp, args[1], -1);
 769         newargs[8] = Jim_NewStringObj(interp, "-irmask", -1);
 770         newargs[9] = Jim_NewStringObj(interp, args[2], -1);
 771
 772         command_print(cmd_ctx, "NEW COMMAND:");
 773         sprintf(buf, "%s %s %s %s %s %s %s %s %s %s",
 774                          Jim_GetString(newargs[0], NULL),
 775                          Jim_GetString(newargs[1], NULL),
 776                          Jim_GetString(newargs[2], NULL),
 777                          Jim_GetString(newargs[3], NULL),
 778                          Jim_GetString(newargs[4], NULL),
 779                          Jim_GetString(newargs[5], NULL),
 780                          Jim_GetString(newargs[6], NULL),
 781                          Jim_GetString(newargs[7], NULL),
 782                          Jim_GetString(newargs[8], NULL),
 783                          Jim_GetString(newargs[9], NULL));
 784
 785         e = jim_jtag_command(interp, 10, newargs);
 786         if (e != JIM_OK) {
 787                 command_print(cmd_ctx, "%s", Jim_GetString(Jim_GetResult(interp), NULL));
 788         }
 789         return e;
 790 }
 791
 792 static int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 793 {
 794         jtag_tap_t *tap;
 795
 796         tap = jtag_all_taps();
 797         command_print(cmd_ctx, "     TapName            | Enabled |   IdCode      Expected    IrLen IrCap  IrMask Instr     ");
 798         command_print(cmd_ctx, "---|--------------------|---------|------------|------------|------|------|------|---------");
 799
 800         while (tap) {
 801                 uint32_t expected, expected_mask, cur_instr, ii;
 802                 expected = buf_get_u32(tap->expected, 0, tap->ir_length);
 803                 expected_mask = buf_get_u32(tap->expected_mask, 0, tap->ir_length);
 804                 cur_instr = buf_get_u32(tap->cur_instr, 0, tap->ir_length);
 805
 806                 command_print(cmd_ctx,
 807                                           "%2d | %-18s |    %c    | 0x%08x | 0x%08x | 0x%02x | 0x%02x | 0x%02x | 0x%02x",
 808                                           tap->abs_chain_position,
 809                                           tap->dotted_name,
 810                                           tap->enabled ? 'Y' : 'n',
 811                                           (unsigned int)(tap->idcode),
 812                                           (unsigned int)(tap->expected_ids_cnt > 0 ? tap->expected_ids[0] : 0),
 813                                           (unsigned int)(tap->ir_length),
 814                                           (unsigned int)(expected),
 815                                           (unsigned int)(expected_mask),
 816                                           (unsigned int)(cur_instr));
 817
 818                 for (ii = 1; ii < tap->expected_ids_cnt; ii++) {
 819                         command_print(cmd_ctx, "   |                    |         |            | 0x%08x |      |      |      |         ",
 820                                                   (unsigned int)(tap->expected_ids[ii]));
 821                 }
 822
 823                 tap = tap->next_tap;
 824         }
 825
 826         return ERROR_OK;
 827 }
 828
 829 static int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 830 {
 831         int new_cfg = 0;
 832         int mask = 0;
 833
 834         if (argc < 1)
 835                 return ERROR_COMMAND_SYNTAX_ERROR;
 836
 837         /* Original versions cared about the order of these tokens:
 838          *   reset_config signals [combination [trst_type [srst_type]]]
 839          * They also clobbered the previous configuration even on error.
 840          *
 841          * Here we don't care about the order, and only change values
 842          * which have been explicitly specified.
 843          */
 844         for (; argc; argc--, args++) {
 845                 int tmp = 0;
 846                 int m;
 847
 848                 /* signals */
 849                 m = RESET_HAS_TRST | RESET_HAS_SRST;
 850                 if (strcmp(*args, "none") == 0)
 851                         tmp = RESET_NONE;
 852                 else if (strcmp(*args, "trst_only") == 0)
 853                         tmp = RESET_HAS_TRST;
 854                 else if (strcmp(*args, "srst_only") == 0)
 855                         tmp = RESET_HAS_SRST;
 856                 else if (strcmp(*args, "trst_and_srst") == 0)
 857                         tmp = RESET_HAS_TRST | RESET_HAS_SRST;
 858                 else
 859                         m = 0;
 860                 if (mask & m) {
 861                         LOG_ERROR("extra reset_config %s spec (%s)",
 862                                         "signal", *args);
 863                         return ERROR_INVALID_ARGUMENTS;
 864                 }
 865                 if (m)
 866                         goto next;
 867
 868                 /* combination (options for broken wiring) */
 869                 m = RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
 870                 if (strcmp(*args, "separate") == 0)
 871                         /* separate reset lines - default */;
 872                 else if (strcmp(*args, "srst_pulls_trst") == 0)
 873                         tmp |= RESET_SRST_PULLS_TRST;
 874                 else if (strcmp(*args, "trst_pulls_srst") == 0)
 875                         tmp |= RESET_TRST_PULLS_SRST;
 876                 else if (strcmp(*args, "combined") == 0)
 877                         tmp |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
 878                 else
 879                         m = 0;
 880                 if (mask & m) {
 881                         LOG_ERROR("extra reset_config %s spec (%s)",
 882                                         "combination", *args);
 883                         return ERROR_INVALID_ARGUMENTS;
 884                 }
 885                 if (m)
 886                         goto next;
 887
 888                 /* trst_type (NOP without HAS_TRST) */
 889                 m = RESET_TRST_OPEN_DRAIN;
 890                 if (strcmp(*args, "trst_open_drain") == 0)
 891                         tmp |= RESET_TRST_OPEN_DRAIN;
 892                 else if (strcmp(*args, "trst_push_pull") == 0)
 893                         /* push/pull from adapter - default */;
 894                 else
 895                         m = 0;
 896                 if (mask & m) {
 897                         LOG_ERROR("extra reset_config %s spec (%s)",
 898                                         "trst_type", *args);
 899                         return ERROR_INVALID_ARGUMENTS;
 900                 }
 901                 if (m)
 902                         goto next;
 903
 904                 /* srst_type (NOP without HAS_SRST) */
 905                 m |= RESET_SRST_PUSH_PULL;
 906                 if (strcmp(*args, "srst_push_pull") == 0)
 907                         tmp |= RESET_SRST_PUSH_PULL;
 908                 else if (strcmp(*args, "srst_open_drain") == 0)
 909                         /* open drain from adapter - default */;
 910                 else
 911                         m = 0;
 912                 if (mask & m) {
 913                         LOG_ERROR("extra reset_config %s spec (%s)",
 914                                         "srst_type", *args);
 915                         return ERROR_INVALID_ARGUMENTS;
 916                 }
 917                 if (m)
 918                         goto next;
 919
 920                 /* caller provided nonsense; fail */
 921                 LOG_ERROR("unknown reset_config flag (%s)", *args);
 922                 return ERROR_INVALID_ARGUMENTS;
 923
 924 next:
 925                 /* Remember the bits which were specified (mask)
 926                  * and their new values (new_cfg).
 927                  */
 928                 mask |= m;
 929                 new_cfg |= tmp;
 930         }
 931
 932         /* clear previous values of those bits, save new values */
 933         enum reset_types old_cfg = jtag_get_reset_config();
 934         old_cfg &= ~mask;
 935         new_cfg |= old_cfg;
 936         jtag_set_reset_config(new_cfg);
 937
 938         return ERROR_OK;
 939 }
 940
 941 static int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx,
 942                 char *cmd, char **args, int argc)
 943 {
 944         if (argc > 1)
 945                 return ERROR_COMMAND_SYNTAX_ERROR;
 946         if (argc == 1)
 947         {
 948                 unsigned delay;
 949                 int retval = parse_uint(args[0], &delay);
 950                 if (ERROR_OK != retval)
 951                         return retval;
 952                 jtag_set_nsrst_delay(delay);
 953         }
 954         command_print(cmd_ctx, "jtag_nsrst_delay: %u", jtag_get_nsrst_delay());
 955         return ERROR_OK;
 956 }
 957
 958 static int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx,
 959                 char *cmd, char **args, int argc)
 960 {
 961         if (argc > 1)
 962                 return ERROR_COMMAND_SYNTAX_ERROR;
 963         if (argc == 1)
 964         {
 965                 unsigned delay;
 966                 int retval = parse_uint(args[0], &delay);
 967                 if (ERROR_OK != retval)
 968                         return retval;
 969                 jtag_set_ntrst_delay(delay);
 970         }
 971         command_print(cmd_ctx, "jtag_ntrst_delay: %u", jtag_get_ntrst_delay());
 972         return ERROR_OK;
 973 }
 974
 975 static int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 976 {
 977         int retval = ERROR_OK;
 978
 979         command_print(cmd_ctx, "OLD SYNTAX: DEPRECATED - "
 980                         "use jtag_khz, not jtag_speed");
 981
 982         if (argc > 1)
 983                 return ERROR_COMMAND_SYNTAX_ERROR;
 984         if (argc == 1)
 985         {
 986                 LOG_DEBUG("handle jtag speed");
 987
 988                 unsigned cur_speed = 0;
 989                 int retval = parse_uint(args[0], &cur_speed);
 990                 if (ERROR_OK != retval)
 991                         return retval;
 992                 retval = jtag_config_speed(cur_speed);
 993
 994         }
 995         command_print(cmd_ctx, "jtag_speed: %d", jtag_get_speed());
 996
 997         return retval;
 998 }
 999
1000 static int handle_jtag_khz_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1001 {
1002         if (argc > 1)
1003                 return ERROR_COMMAND_SYNTAX_ERROR;
1004
1005         int retval = ERROR_OK;
1006         if (argc == 1)
1007         {
1008                 unsigned khz = 0;
1009                 int retval = parse_uint(args[0], &khz);
1010                 if (ERROR_OK != retval)
1011                         return retval;
1012                 retval = jtag_config_khz(khz);
1013                 if (ERROR_OK != retval)
1014                         return retval;
1015         }
1016
1017         int cur_speed = jtag_get_speed_khz();
1018         retval = jtag_get_speed_readable(&cur_speed);
1019         if (ERROR_OK != retval)
1020                 return retval;
1021
1022         if (cur_speed)
1023                 command_print(cmd_ctx, "%d kHz", cur_speed);
1024         else
1025                 command_print(cmd_ctx, "RCLK - adaptive");
1026
1027         return retval;
1028 }
1029
1030 static int handle_jtag_rclk_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1031 {
1032         if (argc > 1)
1033                 return ERROR_COMMAND_SYNTAX_ERROR;
1034
1035         int retval = ERROR_OK;
1036         if (argc == 1)
1037         {
1038                 unsigned khz = 0;
1039                 int retval = parse_uint(args[0], &khz);
1040                 if (ERROR_OK != retval)
1041                         return retval;
1042                 retval = jtag_config_rclk(khz);
1043                 if (ERROR_OK != retval)
1044                         return retval;
1045         }
1046
1047         int cur_khz = jtag_get_speed_khz();
1048         retval = jtag_get_speed_readable(&cur_khz);
1049         if (ERROR_OK != retval)
1050                 return retval;
1051
1052         if (cur_khz)
1053                 command_print(cmd_ctx, "RCLK not supported - fallback to %d kHz", cur_khz);
1054         else
1055                 command_print(cmd_ctx, "RCLK - adaptive");
1056
1057         return retval;
1058 }
1059
1060 static int handle_jtag_reset_command(struct command_context_s *cmd_ctx,
1061                 char *cmd, char **args, int argc)
1062 {
1063         if (argc != 2)
1064                 return ERROR_COMMAND_SYNTAX_ERROR;
1065
1066         int trst = -1;
1067         if (args[0][0] == '1')
1068                 trst = 1;
1069         else if (args[0][0] == '0')
1070                 trst = 0;
1071         else
1072                 return ERROR_COMMAND_SYNTAX_ERROR;
1073
1074         int srst = -1;
1075         if (args[1][0] == '1')
1076                 srst = 1;
1077         else if (args[1][0] == '0')
1078                 srst = 0;
1079         else
1080                 return ERROR_COMMAND_SYNTAX_ERROR;
1081
1082         if (jtag_interface_init(cmd_ctx) != ERROR_OK)
1083                 return ERROR_JTAG_INIT_FAILED;
1084
1085         jtag_add_reset(trst, srst);
1086         return jtag_execute_queue();
1087 }
1088
1089 static int handle_runtest_command(struct command_context_s *cmd_ctx,
1090                 char *cmd, char **args, int argc)
1091 {
1092         if (argc != 1)
1093                 return ERROR_COMMAND_SYNTAX_ERROR;
1094
1095         unsigned num_clocks;
1096         int retval = parse_uint(args[0], &num_clocks);
1097         if (ERROR_OK != retval)
1098                 return retval;
1099
1100         jtag_add_runtest(num_clocks, TAP_IDLE);
1101         return jtag_execute_queue();
1102 }
1103
1104 /*
1105  * For "irscan" or "drscan" commands, the "end" (really, "next") state
1106  * should be stable ... and *NOT* a shift state, otherwise free-running
1107  * jtag clocks could change the values latched by the update state.
1108  */
1109 static bool scan_is_safe(tap_state_t state)
1110 {
1111         switch (state)
1112         {
1113         case TAP_RESET:
1114         case TAP_IDLE:
1115         case TAP_DRPAUSE:
1116         case TAP_IRPAUSE:
1117                 return true;
1118         default:
1119                 return false;
1120         }
1121 }
1122
1123
1124 static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1125 {
1126         int i;
1127         scan_field_t *fields;
1128         jtag_tap_t *tap;
1129         tap_state_t endstate;
1130
1131         if ((argc < 2) || (argc % 2))
1132         {
1133                 return ERROR_COMMAND_SYNTAX_ERROR;
1134         }
1135
1136         /* optional "-endstate" "statename" at the end of the arguments,
1137          * so that e.g. IRPAUSE can let us load the data register before
1138          * entering RUN/IDLE to execute the instruction we load here.
1139          */
1140         endstate = TAP_IDLE;
1141
1142         if (argc >= 4) {
1143                 /* have at least one pair of numbers. */
1144                 /* is last pair the magic text? */
1145                 if (0 == strcmp("-endstate", args[ argc - 2 ])) {
1146                         const char *cpA;
1147                         const char *cpS;
1148                         cpA = args[ argc-1 ];
1149                         for (endstate = 0 ; endstate < TAP_NUM_STATES ; endstate++) {
1150                                 cpS = tap_state_name(endstate);
1151                                 if (0 == strcmp(cpA, cpS)) {
1152                                         break;
1153                                 }
1154                         }
1155                         if (endstate >= TAP_NUM_STATES) {
1156                                 return ERROR_COMMAND_SYNTAX_ERROR;
1157                         } else {
1158                                 if (!scan_is_safe(endstate))
1159                                         LOG_WARNING("irscan with unsafe "
1160                                                         "endstate \"%s\"", cpA);
1161                                 /* found - remove the last 2 args */
1162                                 argc -= 2;
1163                         }
1164                 }
1165         }
1166
1167         int num_fields = argc / 2;
1168         size_t fields_len = sizeof(scan_field_t) * num_fields;
1169         fields = malloc(fields_len);
1170         memset(fields, 0, fields_len);
1171
1172         int retval;
1173         for (i = 0; i < num_fields; i++)
1174         {
1175                 tap = jtag_tap_by_string(args[i*2]);
1176                 if (tap == NULL)
1177                 {
1178                         int j;
1179                         for (j = 0; j < i; j++)
1180                                 free(fields[j].out_value);
1181                         free(fields);
1182                         command_print(cmd_ctx, "Tap: %s unknown", args[i*2]);
1183
1184                         return ERROR_FAIL;
1185                 }
1186                 int field_size = tap->ir_length;
1187                 fields[i].tap = tap;
1188                 fields[i].num_bits = field_size;
1189                 fields[i].out_value = malloc(CEIL(field_size, 8));
1190
1191                 uint32_t value;
1192                 retval = parse_u32(args[i * 2 + 1], &value);
1193                 if (ERROR_OK != retval)
1194                         goto error_return;
1195                 buf_set_u32(fields[i].out_value, 0, field_size, value);
1196                 fields[i].in_value = NULL;
1197         }
1198
1199         /* did we have an endstate? */
1200         jtag_add_ir_scan(num_fields, fields, endstate);
1201
1202         retval = jtag_execute_queue();
1203
1204 error_return:
1205         for (i = 0; i < num_fields; i++)
1206         {
1207                 if (NULL != fields[i].out_value)
1208                         free(fields[i].out_value);
1209         }
1210
1211         free (fields);
1212
1213         return retval;
1214 }
1215
1216 static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *args)
1217 {
1218         int retval;
1219         scan_field_t *fields;
1220         int num_fields;
1221         int field_count = 0;
1222         int i, e;
1223         jtag_tap_t *tap;
1224         tap_state_t endstate;
1225
1226         /* args[1] = device
1227          * args[2] = num_bits
1228          * args[3] = hex string
1229          * ... repeat num bits and hex string ...
1230          *
1231          * .. optionally:
1232         *     args[N-2] = "-endstate"
1233          *     args[N-1] = statename
1234          */
1235         if ((argc < 4) || ((argc % 2) != 0))
1236         {
1237                 Jim_WrongNumArgs(interp, 1, args, "wrong arguments");
1238                 return JIM_ERR;
1239         }
1240
1241         endstate = TAP_IDLE;
1242
1243         script_debug(interp, "drscan", argc, args);
1244
1245         /* validate arguments as numbers */
1246         e = JIM_OK;
1247         for (i = 2; i < argc; i += 2)
1248         {
1249                 long bits;
1250                 const char *cp;
1251
1252                 e = Jim_GetLong(interp, args[i], &bits);
1253                 /* If valid - try next arg */
1254                 if (e == JIM_OK) {
1255                         continue;
1256                 }
1257
1258                 /* Not valid.. are we at the end? */
1259                 if (((i + 2) != argc)) {
1260                         /* nope, then error */
1261                         return e;
1262                 }
1263
1264                 /* it could be: "-endstate FOO"
1265                  * e.g. DRPAUSE so we can issue more instructions
1266                  * before entering RUN/IDLE and executing them.
1267                  */
1268
1269                 /* get arg as a string. */
1270                 cp = Jim_GetString(args[i], NULL);
1271                 /* is it the magic? */
1272                 if (0 == strcmp("-endstate", cp)) {
1273                         /* is the statename valid? */
1274                         cp = Jim_GetString(args[i + 1], NULL);
1275
1276                         /* see if it is a valid state name */
1277                         endstate = tap_state_by_name(cp);
1278                         if (endstate < 0) {
1279                                 /* update the error message */
1280                                 Jim_SetResult_sprintf(interp,"endstate: %s invalid", cp);
1281                         } else {
1282                                 if (!scan_is_safe(endstate))
1283                                         LOG_WARNING("drscan with unsafe "
1284                                                         "endstate \"%s\"", cp);
1285
1286                                 /* valid - so clear the error */
1287                                 e = JIM_OK;
1288                                 /* and remove the last 2 args */
1289                                 argc -= 2;
1290                         }
1291                 }
1292
1293                 /* Still an error? */
1294                 if (e != JIM_OK) {
1295                         return e; /* too bad */
1296                 }
1297         } /* validate args */
1298
1299         tap = jtag_tap_by_jim_obj(interp, args[1]);
1300         if (tap == NULL) {
1301                 return JIM_ERR;
1302         }
1303
1304         num_fields = (argc-2)/2;
1305         fields = malloc(sizeof(scan_field_t) * num_fields);
1306         for (i = 2; i < argc; i += 2)
1307         {
1308                 long bits;
1309                 int len;
1310                 const char *str;
1311
1312                 Jim_GetLong(interp, args[i], &bits);
1313                 str = Jim_GetString(args[i + 1], &len);
1314
1315                 fields[field_count].tap = tap;
1316                 fields[field_count].num_bits = bits;
1317                 fields[field_count].out_value = malloc(CEIL(bits, 8));
1318                 str_to_buf(str, len, fields[field_count].out_value, bits, 0);
1319                 fields[field_count].in_value = fields[field_count].out_value;
1320                 field_count++;
1321         }
1322
1323         jtag_add_dr_scan(num_fields, fields, endstate);
1324
1325         retval = jtag_execute_queue();
1326         if (retval != ERROR_OK)
1327         {
1328                 Jim_SetResultString(interp, "drscan: jtag execute failed",-1);
1329                 return JIM_ERR;
1330         }
1331
1332         field_count = 0;
1333         Jim_Obj *list = Jim_NewListObj(interp, NULL, 0);
1334         for (i = 2; i < argc; i += 2)
1335         {
1336                 long bits;
1337                 char *str;
1338
1339                 Jim_GetLong(interp, args[i], &bits);
1340                 str = buf_to_str(fields[field_count].in_value, bits, 16);
1341                 free(fields[field_count].out_value);
1342
1343                 Jim_ListAppendElement(interp, list, Jim_NewStringObj(interp, str, strlen(str)));
1344                 free(str);
1345                 field_count++;
1346         }
1347
1348         Jim_SetResult(interp, list);
1349
1350         free(fields);
1351
1352         return JIM_OK;
1353 }
1354
1355
1356 static int Jim_Command_pathmove(Jim_Interp *interp, int argc, Jim_Obj *const *args)
1357 {
1358         tap_state_t states[8];
1359
1360         if ((argc < 2) || ((size_t)argc > (sizeof(states)/sizeof(*states) + 1)))
1361         {
1362                 Jim_WrongNumArgs(interp, 1, args, "wrong arguments");
1363                 return JIM_ERR;
1364         }
1365
1366         script_debug(interp, "pathmove", argc, args);
1367
1368         int i;
1369         for (i = 0; i < argc-1; i++)
1370         {
1371                 const char *cp;
1372                 cp = Jim_GetString(args[i + 1], NULL);
1373                 states[i] = tap_state_by_name(cp);
1374                 if (states[i] < 0)
1375                 {
1376                         /* update the error message */
1377                         Jim_SetResult_sprintf(interp,"endstate: %s invalid", cp);
1378                         return JIM_ERR;
1379                 }
1380         }
1381
1382         if ((jtag_add_statemove(states[0]) != ERROR_OK) || (jtag_execute_queue()!= ERROR_OK))
1383         {
1384                 Jim_SetResultString(interp, "pathmove: jtag execute failed",-1);
1385                 return JIM_ERR;
1386         }
1387
1388         jtag_add_pathmove(argc-2, states + 1);
1389
1390         if (jtag_execute_queue()!= ERROR_OK)
1391         {
1392                 Jim_SetResultString(interp, "pathmove: failed",-1);
1393                 return JIM_ERR;
1394         }
1395
1396         return JIM_OK;
1397 }
1398
1399
1400 static int Jim_Command_flush_count(Jim_Interp *interp, int argc, Jim_Obj *const *args)
1401 {
1402         script_debug(interp, "flush_count", argc, args);
1403
1404         Jim_SetResult(interp, Jim_NewIntObj(interp, jtag_get_flush_queue_count()));
1405
1406         return JIM_OK;
1407 }
1408
1409
1410 static int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1411 {
1412         if (argc > 1)
1413                 return ERROR_COMMAND_SYNTAX_ERROR;
1414
1415         if (argc == 1)
1416         {
1417                 if (strcmp(args[0], "enable") == 0)
1418                         jtag_set_verify_capture_ir(true);
1419                 else if (strcmp(args[0], "disable") == 0)
1420                         jtag_set_verify_capture_ir(false);
1421                 else
1422                         return ERROR_COMMAND_SYNTAX_ERROR;
1423         }
1424
1425         const char *status = jtag_will_verify_capture_ir() ? "enabled": "disabled";
1426         command_print(cmd_ctx, "verify Capture-IR is %s", status);
1427
1428         return ERROR_OK;
1429 }
1430
1431 static int handle_verify_jtag_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1432 {
1433         if (argc > 1)
1434                 return ERROR_COMMAND_SYNTAX_ERROR;
1435
1436         if (argc == 1)
1437         {
1438                 if (strcmp(args[0], "enable") == 0)
1439                         jtag_set_verify(true);
1440                 else if (strcmp(args[0], "disable") == 0)
1441                         jtag_set_verify(false);
1442                 else
1443                         return ERROR_COMMAND_SYNTAX_ERROR;
1444         }
1445
1446         const char *status = jtag_will_verify() ? "enabled": "disabled";
1447         command_print(cmd_ctx, "verify jtag capture is %s", status);
1448
1449         return ERROR_OK;
1450 }
1451
1452 static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1453 {
1454         if (argc > 1)
1455                 return ERROR_COMMAND_SYNTAX_ERROR;
1456
1457         if (argc == 1)
1458         {
1459                 bool use_new_table;
1460                 if (strcmp(args[0], "short") == 0)
1461                         use_new_table = true;
1462                 else if (strcmp(args[0], "long") == 0)
1463                         use_new_table = false;
1464                 else
1465                         return ERROR_COMMAND_SYNTAX_ERROR;
1466
1467                 tap_use_new_tms_table(use_new_table);
1468         }
1469
1470         command_print(cmd_ctx, "tms sequence is  %s",
1471                         tap_uses_new_tms_table() ? "short": "long");
1472
1473         return ERROR_OK;
1474 }