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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include "jtag.h"
  27
  28 #include "command.h"
  29 #include "log.h"
  30 #include "interpreter.h"
  31
  32 #include "stdlib.h"
  33 #include "string.h"
  34 #include <unistd.h>
  35
  36 char* tap_state_strings[16] =
  37 {
  38         "tlr",
  39         "sds", "cd", "sd", "e1d", "pd", "e2d", "ud",
  40         "rti",
  41         "sis", "ci", "si", "e1i", "pi", "e2i", "ui"
  42 };
  43
  44 typedef struct cmd_queue_page_s
  45 {
  46         void *address;
  47         size_t used;
  48         struct cmd_queue_page_s *next;
  49 } cmd_queue_page_t;
  50
  51 #define CMD_QUEUE_PAGE_SIZE (1024 * 1024)
  52 static cmd_queue_page_t *cmd_queue_pages = NULL;
  53
  54 /* tap_move[i][j]: tap movement command to go from state i to state j
  55  * 0: Test-Logic-Reset
  56  * 1: Run-Test/Idle
  57  * 2: Shift-DR
  58  * 3: Pause-DR
  59  * 4: Shift-IR
  60  * 5: Pause-IR
  61  *
  62  * SD->SD and SI->SI have to be caught in interface specific code
  63  */
  64 u8 tap_move[6][6] =
  65 {
  66 /*        TLR   RTI   SD    PD    SI    PI             */
  67         {0x7f, 0x00, 0x17, 0x0a, 0x1b, 0x16},   /* TLR */
  68         {0x7f, 0x00, 0x25, 0x05, 0x2b, 0x0b},   /* RTI */
  69         {0x7f, 0x31, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
  70         {0x7f, 0x30, 0x20, 0x17, 0x1e, 0x2f},   /* PD  */
  71         {0x7f, 0x31, 0x07, 0x17, 0x00, 0x01},   /* SI  */
  72         {0x7f, 0x30, 0x1c, 0x17, 0x20, 0x2f}    /* PI  */
  73 };
  74
  75 int tap_move_map[16] = {
  76         0, -1, -1,  2, -1,  3, -1, -1,
  77         1, -1, -1,  4, -1,  5, -1, -1
  78 };
  79
  80 tap_transition_t tap_transitions[16] =
  81 {
  82         {TAP_TLR, TAP_RTI},             /* TLR */
  83         {TAP_SIS, TAP_CD},              /* SDS */
  84         {TAP_E1D, TAP_SD},              /* CD  */
  85         {TAP_E1D, TAP_SD},              /* SD  */
  86         {TAP_UD,  TAP_PD},              /* E1D */
  87         {TAP_E2D, TAP_PD},              /* PD  */
  88         {TAP_UD,  TAP_SD},              /* E2D */
  89         {TAP_SDS, TAP_RTI},             /* UD  */
  90         {TAP_SDS, TAP_RTI},             /* RTI */
  91         {TAP_TLR, TAP_CI},              /* SIS */
  92         {TAP_E1I, TAP_SI},              /* CI  */
  93         {TAP_E1I, TAP_SI},              /* SI  */
  94         {TAP_UI,  TAP_PI},              /* E1I */
  95         {TAP_E2I, TAP_PI},              /* PI  */
  96         {TAP_UI,  TAP_SI},              /* E2I */
  97         {TAP_SDS, TAP_RTI}              /* UI  */
  98 };
  99
 100 char* jtag_event_strings[] =
 101 {
 102         "SRST asserted",
 103         "TRST asserted",
 104         "SRST released",
 105         "TRST released"
 106 };
 107
 108 enum tap_state end_state = TAP_TLR;
 109 enum tap_state cur_state = TAP_TLR;
 110 int jtag_trst = 0;
 111 int jtag_srst = 0;
 112
 113 jtag_command_t *jtag_command_queue = NULL;
 114 jtag_command_t **last_comand_pointer = &jtag_command_queue;
 115 jtag_device_t *jtag_devices = NULL;
 116 int jtag_num_devices = 0;
 117 int jtag_ir_scan_size = 0;
 118 enum reset_types jtag_reset_config = RESET_NONE;
 119 enum tap_state cmd_queue_end_state = TAP_TLR;
 120 enum tap_state cmd_queue_cur_state = TAP_TLR;
 121
 122 int jtag_verify_capture_ir = 1;
 123
 124 /* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
 125 int jtag_nsrst_delay = 0; /* default to no nSRST delay */
 126 int jtag_ntrst_delay = 0; /* default to no nTRST delay */
 127
 128 /* maximum number of JTAG devices expected in the chain
 129  */
 130 #define JTAG_MAX_CHAIN_SIZE 20
 131
 132 /* callbacks to inform high-level handlers about JTAG state changes */
 133 jtag_event_callback_t *jtag_event_callbacks;
 134
 135 /* jtag interfaces (parport, FTDI-USB, TI-USB, ...)
 136  */
 137 #if BUILD_PARPORT == 1
 138         extern jtag_interface_t parport_interface;
 139 #endif
 140
 141 #if BUILD_FT2232_FTD2XX == 1
 142         extern jtag_interface_t ft2232_interface;
 143 #endif
 144
 145 #if BUILD_FT2232_LIBFTDI == 1
 146         extern jtag_interface_t ft2232_interface;
 147 #endif
 148
 149 #if BUILD_AMTJTAGACCEL == 1
 150         extern jtag_interface_t amt_jtagaccel_interface;
 151 #endif
 152
 153 #if BUILD_EP93XX == 1
 154         extern jtag_interface_t ep93xx_interface;
 155 #endif
 156
 157 #if BUILD_AT91RM9200 == 1
 158         extern jtag_interface_t at91rm9200_interface;
 159 #endif
 160
 161 #if BUILD_GW16012 == 1
 162         extern jtag_interface_t gw16012_interface;
 163 #endif
 164
 165 #if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
 166         extern jtag_interface_t presto_interface;
 167 #endif
 168
 169 #if BUILD_USBPROG == 1
 170         extern jtag_interface_t usbprog_interface;
 171 #endif
 172
 173 jtag_interface_t *jtag_interfaces[] = {
 174 #if BUILD_PARPORT == 1
 175         &parport_interface,
 176 #endif
 177 #if BUILD_FT2232_FTD2XX == 1
 178         &ft2232_interface,
 179 #endif
 180 #if BUILD_FT2232_LIBFTDI == 1
 181         &ft2232_interface,
 182 #endif
 183 #if BUILD_AMTJTAGACCEL == 1
 184         &amt_jtagaccel_interface,
 185 #endif
 186 #if BUILD_EP93XX == 1
 187         &ep93xx_interface,
 188 #endif
 189 #if BUILD_AT91RM9200 == 1
 190         &at91rm9200_interface,
 191 #endif
 192 #if BUILD_GW16012 == 1
 193         &gw16012_interface,
 194 #endif
 195 #if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
 196         &presto_interface,
 197 #endif
 198 #if BUILD_USBPROG == 1
 199         &usbprog_interface,
 200 #endif
 201         NULL,
 202 };
 203
 204 jtag_interface_t *jtag = NULL;
 205
 206 /* configuration */
 207 char* jtag_interface = NULL;
 208 int jtag_speed = -1;
 209
 210
 211 /* forward declarations */
 212 int jtag_add_statemove(enum tap_state endstate);
 213 int jtag_add_pathmove(int num_states, enum tap_state *path);
 214 int jtag_add_runtest(int num_cycles, enum tap_state endstate);
 215 int jtag_add_reset(int trst, int srst);
 216 int jtag_add_end_state(enum tap_state endstate);
 217 int jtag_add_sleep(u32 us);
 218 int jtag_execute_queue(void);
 219 int jtag_cancel_queue(void);
 220
 221 /* jtag commands */
 222 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 223 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 224 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 225 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 226 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 227 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 228
 229 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 230
 231 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 232 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 233 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 234 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 235 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 236 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 237
 238 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 239
 240 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 241 {
 242         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 243
 244         if (callback == NULL)
 245         {
 246                 return ERROR_INVALID_ARGUMENTS;
 247         }
 248
 249         if (*callbacks_p)
 250         {
 251                 while ((*callbacks_p)->next)
 252                         callbacks_p = &((*callbacks_p)->next);
 253                 callbacks_p = &((*callbacks_p)->next);
 254         }
 255
 256         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 257         (*callbacks_p)->callback = callback;
 258         (*callbacks_p)->priv = priv;
 259         (*callbacks_p)->next = NULL;
 260
 261         return ERROR_OK;
 262 }
 263
 264 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 265 {
 266         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 267
 268         if (callback == NULL)
 269         {
 270                 return ERROR_INVALID_ARGUMENTS;
 271         }
 272
 273         while (*callbacks_p)
 274         {
 275                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 276                 if ((*callbacks_p)->callback == callback)
 277                 {
 278                         free(*callbacks_p);
 279                         *callbacks_p = *next;
 280                 }
 281                 callbacks_p = next;
 282         }
 283
 284         return ERROR_OK;
 285 }
 286
 287 int jtag_call_event_callbacks(enum jtag_event event)
 288 {
 289         jtag_event_callback_t *callback = jtag_event_callbacks;
 290
 291         DEBUG("jtag event: %s", jtag_event_strings[event]);
 292
 293         while (callback)
 294         {
 295                 callback->callback(event, callback->priv);
 296                 callback = callback->next;
 297         }
 298
 299         return ERROR_OK;
 300 }
 301
 302 /* returns a pointer to the pointer of the last command in queue
 303  * this may be a pointer to the root pointer (jtag_command_queue)
 304  * or to the next member of the last but one command
 305  */
 306 jtag_command_t** jtag_get_last_command_p(void)
 307 {
 308 /*      jtag_command_t *cmd = jtag_command_queue;
 309
 310         if (cmd)
 311                 while (cmd->next)
 312                         cmd = cmd->next;
 313         else
 314                 return &jtag_command_queue;
 315
 316         return &cmd->next;*/
 317
 318         return last_comand_pointer;
 319 }
 320
 321 /* returns a pointer to the n-th device in the scan chain */
 322 jtag_device_t* jtag_get_device(int num)
 323 {
 324         jtag_device_t *device = jtag_devices;
 325         int i = 0;
 326
 327         while (device)
 328         {
 329                 if (num == i)
 330                         return device;
 331                 device = device->next;
 332                 i++;
 333         }
 334
 335         ERROR("jtag device number %d not defined", num);
 336         exit(-1);
 337 }
 338
 339 void* cmd_queue_alloc(size_t size)
 340 {
 341         cmd_queue_page_t **p_page = &cmd_queue_pages;
 342         int offset;
 343
 344         if (*p_page)
 345         {
 346                 while ((*p_page)->next)
 347                         p_page = &((*p_page)->next);
 348                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 349                         p_page = &((*p_page)->next);
 350         }
 351
 352         if (!*p_page)
 353         {
 354                 *p_page = malloc(sizeof(cmd_queue_page_t));
 355                 (*p_page)->used = 0;
 356                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 357                 (*p_page)->next = NULL;
 358         }
 359
 360         offset = (*p_page)->used;
 361         (*p_page)->used += size;
 362
 363         u8 *t=(u8 *)((*p_page)->address);
 364         return t + offset;
 365 }
 366
 367 void cmd_queue_free()
 368 {
 369         cmd_queue_page_t *page = cmd_queue_pages;
 370
 371         while (page)
 372         {
 373                 cmd_queue_page_t *last = page;
 374                 free(page->address);
 375                 page = page->next;
 376                 free(last);
 377         }
 378
 379         cmd_queue_pages = NULL;
 380 }
 381
 382 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 383 {
 384         jtag_command_t **last_cmd;
 385         jtag_device_t *device;
 386         int i, j;
 387         int scan_size = 0;
 388
 389         if (jtag_trst == 1)
 390         {
 391                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 392                 return ERROR_JTAG_TRST_ASSERTED;
 393         }
 394
 395         last_cmd = jtag_get_last_command_p();
 396
 397         /* allocate memory for a new list member */
 398         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 399         (*last_cmd)->next = NULL;
 400         last_comand_pointer = &((*last_cmd)->next);
 401         (*last_cmd)->type = JTAG_SCAN;
 402
 403         /* allocate memory for ir scan command */
 404         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 405         (*last_cmd)->cmd.scan->ir_scan = 1;
 406         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 407         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 408         (*last_cmd)->cmd.scan->end_state = state;
 409
 410         if (state != -1)
 411                 cmd_queue_end_state = state;
 412
 413         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 414                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 415
 416         if (cmd_queue_end_state == TAP_TLR)
 417                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 418
 419         cmd_queue_cur_state = cmd_queue_end_state;
 420
 421         for (i = 0; i < jtag_num_devices; i++)
 422         {
 423                 int found = 0;
 424                 device = jtag_get_device(i);
 425                 scan_size = device->ir_length;
 426                 (*last_cmd)->cmd.scan->fields[i].device = i;
 427                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 428                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 429                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;     /* disable verification by default */
 430
 431                 /* search the list */
 432                 for (j = 0; j < num_fields; j++)
 433                 {
 434                         if (i == fields[j].device)
 435                         {
 436                                 found = 1;
 437                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 438                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 439
 440                                 if (jtag_verify_capture_ir)
 441                                 {
 442                                         if (fields[j].in_handler==NULL)
 443                                         {
 444                                                 jtag_set_check_value((*last_cmd)->cmd.scan->fields+i, device->expected, device->expected_mask, NULL);
 445                                         } else
 446                                         {
 447                                                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[j].in_handler;
 448                                                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[j].in_handler_priv;
 449                                                 (*last_cmd)->cmd.scan->fields[i].in_check_value = device->expected;
 450                                                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = device->expected_mask;
 451                                         }
 452                                 }
 453
 454                                 device->bypass = 0;
 455                                 break;
 456                         }
 457                 }
 458
 459                 if (!found)
 460                 {
 461                         /* if a device isn't listed, set it to BYPASS */
 462                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 463                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 464                         device->bypass = 1;
 465
 466                 }
 467
 468                 /* update device information */
 469                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 470         }
 471
 472         return ERROR_OK;
 473 }
 474
 475 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 476 {
 477         jtag_command_t **last_cmd;
 478         int i;
 479
 480         if (jtag_trst == 1)
 481         {
 482                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 483                 return ERROR_JTAG_TRST_ASSERTED;
 484         }
 485
 486         last_cmd = jtag_get_last_command_p();
 487
 488         /* allocate memory for a new list member */
 489         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 490         (*last_cmd)->next = NULL;
 491         last_comand_pointer = &((*last_cmd)->next);
 492         (*last_cmd)->type = JTAG_SCAN;
 493
 494         /* allocate memory for ir scan command */
 495         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 496         (*last_cmd)->cmd.scan->ir_scan = 1;
 497         (*last_cmd)->cmd.scan->num_fields = num_fields;
 498         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 499         (*last_cmd)->cmd.scan->end_state = state;
 500
 501         if (state != -1)
 502                 cmd_queue_end_state = state;
 503
 504         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 505                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 506
 507         if (cmd_queue_end_state == TAP_TLR)
 508                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 509
 510         cmd_queue_cur_state = cmd_queue_end_state;
 511
 512         for (i = 0; i < num_fields; i++)
 513         {
 514                 int num_bits = fields[i].num_bits;
 515                 int num_bytes = CEIL(fields[i].num_bits, 8);
 516                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 517                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 518                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 519                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 520                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 521                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 522                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 523                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 524                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 525         }
 526         return ERROR_OK;
 527 }
 528
 529 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 530 {
 531         int i, j;
 532         int bypass_devices = 0;
 533         int field_count = 0;
 534         jtag_command_t **last_cmd = jtag_get_last_command_p();
 535         jtag_device_t *device = jtag_devices;
 536         int scan_size;
 537
 538         if (jtag_trst == 1)
 539         {
 540                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 541                 return ERROR_JTAG_TRST_ASSERTED;
 542         }
 543
 544         /* count devices in bypass */
 545         while (device)
 546         {
 547                 if (device->bypass)
 548                         bypass_devices++;
 549                 device = device->next;
 550         }
 551
 552         /* allocate memory for a new list member */
 553         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 554         last_comand_pointer = &((*last_cmd)->next);
 555         (*last_cmd)->next = NULL;
 556         (*last_cmd)->type = JTAG_SCAN;
 557
 558         /* allocate memory for dr scan command */
 559         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 560         (*last_cmd)->cmd.scan->ir_scan = 0;
 561         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 562         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 563         (*last_cmd)->cmd.scan->end_state = state;
 564
 565         if (state != -1)
 566                 cmd_queue_end_state = state;
 567
 568         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 569                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 570
 571         if (cmd_queue_end_state == TAP_TLR)
 572                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 573
 574         cmd_queue_cur_state = cmd_queue_end_state;
 575
 576         for (i = 0; i < jtag_num_devices; i++)
 577         {
 578                 int found = 0;
 579                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 580
 581                 for (j = 0; j < num_fields; j++)
 582                 {
 583                         if (i == fields[j].device)
 584                         {
 585                                 found = 1;
 586                                 scan_size = fields[j].num_bits;
 587                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 588                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 589                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 590                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 591                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_value = fields[j].in_check_value;
 592                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = fields[j].in_check_mask;
 593                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 594                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 595                         }
 596                 }
 597                 if (!found)
 598                 {
 599                         /* if a device isn't listed, the BYPASS register should be selected */
 600                         if (!jtag_get_device(i)->bypass)
 601                         {
 602                                 ERROR("BUG: no scan data for a device not in BYPASS");
 603                                 exit(-1);
 604                         }
 605
 606                         /* program the scan field to 1 bit length, and ignore it's value */
 607                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 608                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 609                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 610                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 611                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 612                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 613                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 614                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 615                 }
 616                 else
 617                 {
 618                         /* if a device is listed, the BYPASS register must not be selected */
 619                         if (jtag_get_device(i)->bypass)
 620                         {
 621                                 WARNING("scan data for a device in BYPASS");
 622                         }
 623                 }
 624         }
 625         return ERROR_OK;
 626 }
 627
 628 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 629 {
 630         int i;
 631         jtag_command_t **last_cmd = jtag_get_last_command_p();
 632
 633         if (jtag_trst == 1)
 634         {
 635                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 636                 return ERROR_JTAG_TRST_ASSERTED;
 637         }
 638
 639         /* allocate memory for a new list member */
 640         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 641         last_comand_pointer = &((*last_cmd)->next);
 642         (*last_cmd)->next = NULL;
 643         (*last_cmd)->type = JTAG_SCAN;
 644
 645         /* allocate memory for scan command */
 646         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 647         (*last_cmd)->cmd.scan->ir_scan = 0;
 648         (*last_cmd)->cmd.scan->num_fields = num_fields;
 649         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 650         (*last_cmd)->cmd.scan->end_state = state;
 651
 652         if (state != -1)
 653                 cmd_queue_end_state = state;
 654
 655         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 656                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 657
 658         if (cmd_queue_end_state == TAP_TLR)
 659                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 660
 661         cmd_queue_cur_state = cmd_queue_end_state;
 662
 663         for (i = 0; i < num_fields; i++)
 664         {
 665                 int num_bits = fields[i].num_bits;
 666                 int num_bytes = CEIL(fields[i].num_bits, 8);
 667                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 668                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 669                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 670                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 671                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 672                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 673                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 674                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 675                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 676         }
 677
 678         return ERROR_OK;
 679 }
 680 int jtag_add_statemove(enum tap_state state)
 681 {
 682         jtag_command_t **last_cmd = jtag_get_last_command_p();
 683
 684         if (jtag_trst == 1)
 685         {
 686                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 687                 return ERROR_JTAG_TRST_ASSERTED;
 688         }
 689
 690         /* allocate memory for a new list member */
 691         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 692         last_comand_pointer = &((*last_cmd)->next);
 693         (*last_cmd)->next = NULL;
 694         (*last_cmd)->type = JTAG_STATEMOVE;
 695
 696         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 697         (*last_cmd)->cmd.statemove->end_state = state;
 698
 699         if (state != -1)
 700                 cmd_queue_end_state = state;
 701
 702         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 703                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 704
 705         if (cmd_queue_end_state == TAP_TLR)
 706                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 707
 708         cmd_queue_cur_state = cmd_queue_end_state;
 709
 710         return ERROR_OK;
 711 }
 712
 713 int jtag_add_pathmove(int num_states, enum tap_state *path)
 714 {
 715         jtag_command_t **last_cmd = jtag_get_last_command_p();
 716         int i;
 717
 718         if (jtag_trst == 1)
 719         {
 720                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 721                 return ERROR_JTAG_TRST_ASSERTED;
 722         }
 723
 724         /* the last state has to be a stable state */
 725         if (tap_move_map[path[num_states - 1]] == -1)
 726         {
 727                 ERROR("TAP path doesn't finish in a stable state");
 728                 return ERROR_JTAG_NOT_IMPLEMENTED;
 729         }
 730
 731         /* allocate memory for a new list member */
 732         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 733         last_comand_pointer = &((*last_cmd)->next);
 734         (*last_cmd)->next = NULL;
 735         (*last_cmd)->type = JTAG_PATHMOVE;
 736
 737         (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 738         (*last_cmd)->cmd.pathmove->num_states = num_states;
 739         (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 740
 741         for (i = 0; i < num_states; i++)
 742                 (*last_cmd)->cmd.pathmove->path[i] = path[i];
 743
 744         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 745                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 746
 747         if (cmd_queue_end_state == TAP_TLR)
 748                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 749
 750         cmd_queue_cur_state = path[num_states - 1];
 751
 752         return ERROR_OK;
 753 }
 754
 755 int jtag_add_runtest(int num_cycles, enum tap_state state)
 756 {
 757         jtag_command_t **last_cmd = jtag_get_last_command_p();
 758
 759         if (jtag_trst == 1)
 760         {
 761                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 762                 return ERROR_JTAG_TRST_ASSERTED;
 763         }
 764
 765         /* allocate memory for a new list member */
 766         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 767         (*last_cmd)->next = NULL;
 768         last_comand_pointer = &((*last_cmd)->next);
 769         (*last_cmd)->type = JTAG_RUNTEST;
 770
 771         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 772         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 773         (*last_cmd)->cmd.runtest->end_state = state;
 774
 775         if (state != -1)
 776                 cmd_queue_end_state = state;
 777
 778         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 779                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 780
 781         if (cmd_queue_end_state == TAP_TLR)
 782                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 783
 784         cmd_queue_cur_state = cmd_queue_end_state;
 785
 786         return ERROR_OK;
 787 }
 788
 789 int jtag_add_reset(int req_trst, int req_srst)
 790 {
 791         int trst_with_tms = 0;
 792
 793         jtag_command_t **last_cmd = jtag_get_last_command_p();
 794
 795         if (req_trst == -1)
 796                 req_trst = jtag_trst;
 797
 798         if (req_srst == -1)
 799                 req_srst = jtag_srst;
 800
 801         /* Make sure that jtag_reset_config allows the requested reset */
 802         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 803         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 804                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 805
 806         /* if TRST pulls SRST, we reset with TAP T-L-R */
 807         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 808         {
 809                 req_trst = 0;
 810                 trst_with_tms = 1;
 811         }
 812
 813         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 814         {
 815                 ERROR("requested nSRST assertion, but the current configuration doesn't support this");
 816                 return ERROR_JTAG_RESET_CANT_SRST;
 817         }
 818
 819         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 820         {
 821                 req_trst = 0;
 822                 trst_with_tms = 1;
 823         }
 824
 825         /* allocate memory for a new list member */
 826         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 827         (*last_cmd)->next = NULL;
 828         last_comand_pointer = &((*last_cmd)->next);
 829         (*last_cmd)->type = JTAG_RESET;
 830
 831         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 832         (*last_cmd)->cmd.reset->trst = req_trst;
 833         (*last_cmd)->cmd.reset->srst = req_srst;
 834
 835         jtag_trst = req_trst;
 836         jtag_srst = req_srst;
 837
 838         if (jtag_srst)
 839         {
 840                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 841         }
 842         else
 843         {
 844                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 845                 if (jtag_nsrst_delay)
 846                         jtag_add_sleep(jtag_nsrst_delay * 1000);
 847         }
 848
 849         if (trst_with_tms)
 850         {
 851                 last_cmd = &((*last_cmd)->next);
 852
 853                 /* allocate memory for a new list member */
 854                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 855                 (*last_cmd)->next = NULL;
 856                 last_comand_pointer = &((*last_cmd)->next);
 857                 (*last_cmd)->type = JTAG_STATEMOVE;
 858
 859                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 860                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 861
 862                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 863                 cmd_queue_cur_state = TAP_TLR;
 864                 cmd_queue_end_state = TAP_TLR;
 865
 866                 return ERROR_OK;
 867         }
 868         else
 869         {
 870                 if (jtag_trst)
 871                 {
 872                         /* we just asserted nTRST, so we're now in Test-Logic-Reset,
 873                          * and inform possible listeners about this
 874                          */
 875                         cmd_queue_cur_state = TAP_TLR;
 876                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 877                 }
 878                 else
 879                 {
 880                         /* the nTRST line got deasserted, so we're still in Test-Logic-Reset,
 881                          * but we might want to add a delay to give the TAP time to settle
 882                          */
 883                         if (jtag_ntrst_delay)
 884                                 jtag_add_sleep(jtag_ntrst_delay * 1000);
 885                 }
 886         }
 887
 888         return ERROR_OK;
 889 }
 890
 891 int jtag_add_end_state(enum tap_state state)
 892 {
 893         jtag_command_t **last_cmd = jtag_get_last_command_p();
 894
 895         /* allocate memory for a new list member */
 896         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 897         (*last_cmd)->next = NULL;
 898         last_comand_pointer = &((*last_cmd)->next);
 899         (*last_cmd)->type = JTAG_END_STATE;
 900
 901         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 902         (*last_cmd)->cmd.end_state->end_state = state;
 903
 904         if (state != -1)
 905                 cmd_queue_end_state = state;
 906
 907         return ERROR_OK;
 908 }
 909
 910 int jtag_add_sleep(u32 us)
 911 {
 912         jtag_command_t **last_cmd = jtag_get_last_command_p();
 913
 914         /* allocate memory for a new list member */
 915         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 916         (*last_cmd)->next = NULL;
 917         last_comand_pointer = &((*last_cmd)->next);
 918         (*last_cmd)->type = JTAG_SLEEP;
 919
 920         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 921         (*last_cmd)->cmd.sleep->us = us;
 922
 923         return ERROR_OK;
 924 }
 925
 926 int jtag_scan_size(scan_command_t *cmd)
 927 {
 928         int bit_count = 0;
 929         int i;
 930
 931         /* count bits in scan command */
 932         for (i = 0; i < cmd->num_fields; i++)
 933         {
 934                 bit_count += cmd->fields[i].num_bits;
 935         }
 936
 937         return bit_count;
 938 }
 939
 940 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 941 {
 942         int bit_count = 0;
 943         int i;
 944
 945         bit_count = jtag_scan_size(cmd);
 946         *buffer = malloc(CEIL(bit_count, 8));
 947
 948         bit_count = 0;
 949
 950         for (i = 0; i < cmd->num_fields; i++)
 951         {
 952                 if (cmd->fields[i].out_value)
 953                 {
 954 #ifdef _DEBUG_JTAG_IO_
 955                         char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > 64) ? 64 : cmd->fields[i].num_bits, 16);
 956 #endif
 957                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
 958 #ifdef _DEBUG_JTAG_IO_
 959                         DEBUG("fields[%i].out_value: 0x%s", i, char_buf);
 960                         free(char_buf);
 961 #endif
 962                 }
 963
 964                 bit_count += cmd->fields[i].num_bits;
 965         }
 966
 967         return bit_count;
 968
 969 }
 970
 971 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
 972 {
 973         int i;
 974         int bit_count = 0;
 975         int retval;
 976
 977         /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
 978         retval = ERROR_OK;
 979
 980         for (i = 0; i < cmd->num_fields; i++)
 981         {
 982                 /* if neither in_value nor in_handler
 983                  * are specified we don't have to examine this field
 984                  */
 985                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
 986                 {
 987                         int num_bits = cmd->fields[i].num_bits;
 988                         u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
 989
 990 #ifdef _DEBUG_JTAG_IO_
 991                         char *char_buf;
 992
 993                         char_buf = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
 994                         DEBUG("fields[%i].in_value: 0x%s", i, char_buf);
 995                         free(char_buf);
 996 #endif
 997
 998                         if (cmd->fields[i].in_value)
 999                         {
1000                                 buf_cpy(captured, cmd->fields[i].in_value, num_bits);
1001
1002                                 if (cmd->fields[i].in_handler)
1003                                 {
1004                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1005                                         {
1006                                                 WARNING("in_handler reported a failed check");
1007                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1008                                         }
1009                                 }
1010                         }
1011
1012                         /* no in_value specified, but a handler takes care of the scanned data */
1013                         if (cmd->fields[i].in_handler && (!cmd->fields[i].in_value))
1014                         {
1015                                 if (cmd->fields[i].in_handler(captured, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1016                                 {
1017                                         /* We're going to call the error:handler later, but if the in_handler
1018                                          * reported an error we report this failure upstream
1019                                          */
1020                                         WARNING("in_handler reported a failed check");
1021                                         retval = ERROR_JTAG_QUEUE_FAILED;
1022                                 }
1023                         }
1024
1025                         free(captured);
1026                 }
1027                 bit_count += cmd->fields[i].num_bits;
1028         }
1029
1030         return retval;
1031 }
1032
1033 int jtag_check_value(u8 *captured, void *priv, scan_field_t *field)
1034 {
1035         int retval = ERROR_OK;
1036         int num_bits = field->num_bits;
1037
1038         int compare_failed = 0;
1039
1040         if (field->in_check_mask)
1041                 compare_failed = buf_cmp_mask(captured, field->in_check_value, field->in_check_mask, num_bits);
1042         else
1043                 compare_failed = buf_cmp(captured, field->in_check_value, num_bits);
1044
1045         if (compare_failed)
1046                 {
1047                 /* An error handler could have caught the failing check
1048                  * only report a problem when there wasn't a handler, or if the handler
1049                  * acknowledged the error
1050                  */
1051                 if (compare_failed)
1052                 {
1053                         char *captured_char = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1054                         char *in_check_value_char = buf_to_str(field->in_check_value, (num_bits > 64) ? 64 : num_bits, 16);
1055
1056                         if (field->in_check_mask)
1057                         {
1058                                 char *in_check_mask_char;
1059                                 in_check_mask_char = buf_to_str(field->in_check_mask, (num_bits > 64) ? 64 : num_bits, 16);
1060                                 WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s check_mask: 0x%s", captured_char, in_check_value_char, in_check_mask_char);
1061                                 free(in_check_mask_char);
1062                         }
1063                         else
1064                         {
1065                                 WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
1066                         }
1067
1068                         free(captured_char);
1069                         free(in_check_value_char);
1070
1071                         retval = ERROR_JTAG_QUEUE_FAILED;
1072                 }
1073
1074         }
1075         return retval;
1076 }
1077
1078 /*
1079   set up checking of this field using the in_handler. The values passed in must be valid until
1080   after jtag_execute() has completed.
1081  */
1082 void jtag_set_check_value(scan_field_t *field, u8 *value, u8 *mask, error_handler_t *in_error_handler)
1083 {
1084         if (value)
1085                 field->in_handler = jtag_check_value;
1086         else
1087                 field->in_handler = NULL;       /* No check, e.g. embeddedice uses value==NULL to indicate no check */
1088         field->in_handler_priv = NULL;  /* this will be filled in at the invocation site to point to the field duplicate */
1089         field->in_check_value = value;
1090         field->in_check_mask = mask;
1091 }
1092
1093 enum scan_type jtag_scan_type(scan_command_t *cmd)
1094 {
1095         int i;
1096         int type = 0;
1097
1098         for (i = 0; i < cmd->num_fields; i++)
1099         {
1100                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
1101                         type |= SCAN_IN;
1102                 if (cmd->fields[i].out_value)
1103                         type |= SCAN_OUT;
1104         }
1105
1106         return type;
1107 }
1108
1109 int jtag_execute_queue(void)
1110 {
1111         int retval;
1112
1113         retval = jtag->execute_queue();
1114
1115         cmd_queue_free();
1116
1117         jtag_command_queue = NULL;
1118         last_comand_pointer = &jtag_command_queue;
1119
1120         return retval;
1121 }
1122
1123 int jtag_cancel_queue(void)
1124 {
1125         cmd_queue_free();
1126         jtag_command_queue = NULL;
1127         last_comand_pointer = &jtag_command_queue;
1128
1129         return ERROR_OK;
1130 }
1131
1132 int jtag_reset_callback(enum jtag_event event, void *priv)
1133 {
1134         jtag_device_t *device = priv;
1135
1136         DEBUG("-");
1137
1138         if (event == JTAG_TRST_ASSERTED)
1139         {
1140                 buf_set_ones(device->cur_instr, device->ir_length);
1141                 device->bypass = 1;
1142         }
1143
1144         return ERROR_OK;
1145 }
1146
1147 void jtag_sleep(u32 us)
1148 {
1149         usleep(us);
1150 }
1151
1152 /* Try to examine chain layout according to IEEE 1149.1 §12
1153  */
1154 int jtag_examine_chain()
1155 {
1156         jtag_device_t *device = jtag_devices;
1157         scan_field_t field;
1158         u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
1159         int i;
1160         int bit_count;
1161         int device_count = 0;
1162         u8 zero_check = 0x0;
1163         u8 one_check = 0xff;
1164
1165         field.device = 0;
1166         field.num_bits = sizeof(idcode_buffer) * 8;
1167         field.out_value = idcode_buffer;
1168         field.out_mask = NULL;
1169         field.in_value = idcode_buffer;
1170         field.in_check_value = NULL;
1171         field.in_check_mask = NULL;
1172         field.in_handler = NULL;
1173         field.in_handler_priv = NULL;
1174
1175         for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
1176         {
1177                 buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
1178         }
1179
1180         jtag_add_plain_dr_scan(1, &field, TAP_TLR, NULL);
1181         jtag_execute_queue();
1182
1183         for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++)
1184         {
1185                 zero_check |= idcode_buffer[i];
1186                 one_check &= idcode_buffer[i];
1187         }
1188
1189         /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */
1190         if ((zero_check == 0x00) || (one_check == 0xff))
1191         {
1192                 ERROR("JTAG communication failure, check connection, JTAG interface, target power etc.");
1193                 return ERROR_JTAG_INIT_FAILED;
1194         }
1195
1196         for (bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
1197         {
1198                 u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
1199                 if ((idcode & 1) == 0)
1200                 {
1201                         /* LSB must not be 0, this indicates a device in bypass */
1202                         device_count++;
1203
1204                         bit_count += 1;
1205                 }
1206                 else
1207                 {
1208                         u32 manufacturer;
1209                         u32 part;
1210                         u32 version;
1211
1212                         if (idcode == 0x000000FF)
1213                         {
1214                                 /* End of chain (invalid manufacturer ID) */
1215                                 break;
1216                         }
1217
1218                         if (device)
1219                         {
1220                                 device->idcode = idcode;
1221                                 device = device->next;
1222                         }
1223                         device_count++;
1224
1225                         manufacturer = (idcode & 0xffe) >> 1;
1226                         part = (idcode & 0xffff000) >> 12;
1227                         version = (idcode & 0xf0000000) >> 28;
1228
1229                         INFO("JTAG device found: 0x%8.8x (Manufacturer: 0x%3.3x, Part: 0x%4.4x, Version: 0x%1.1x)",
1230                                 idcode, manufacturer, part, version);
1231
1232                         bit_count += 32;
1233                 }
1234         }
1235
1236         /* see if number of discovered devices matches configuration */
1237         if (device_count != jtag_num_devices)
1238         {
1239                 ERROR("number of discovered devices in JTAG chain (%i) doesn't match configuration (%i)",
1240                         device_count, jtag_num_devices);
1241                 ERROR("check the config file and ensure proper JTAG communication (connections, speed, ...)");
1242                 return ERROR_JTAG_INIT_FAILED;
1243         }
1244
1245         return ERROR_OK;
1246 }
1247
1248 int jtag_validate_chain()
1249 {
1250         jtag_device_t *device = jtag_devices;
1251         int total_ir_length = 0;
1252         u8 *ir_test = NULL;
1253         scan_field_t field;
1254         int chain_pos = 0;
1255
1256         while (device)
1257         {
1258                 total_ir_length += device->ir_length;
1259                 device = device->next;
1260         }
1261
1262         total_ir_length += 2;
1263         ir_test = malloc(CEIL(total_ir_length, 8));
1264         buf_set_ones(ir_test, total_ir_length);
1265
1266         field.device = 0;
1267         field.num_bits = total_ir_length;
1268         field.out_value = ir_test;
1269         field.out_mask = NULL;
1270         field.in_value = ir_test;
1271         field.in_check_value = NULL;
1272         field.in_check_mask = NULL;
1273         field.in_handler = NULL;
1274         field.in_handler_priv = NULL;
1275
1276         jtag_add_plain_ir_scan(1, &field, TAP_TLR, NULL);
1277         jtag_execute_queue();
1278
1279         device = jtag_devices;
1280         while (device)
1281         {
1282                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1283                 {
1284                         char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1285                         ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1286                         free(cbuf);
1287                         free(ir_test);
1288                         return ERROR_JTAG_INIT_FAILED;
1289                 }
1290                 chain_pos += device->ir_length;
1291                 device = device->next;
1292         }
1293
1294         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1295         {
1296                 char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1297                 ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1298                 free(cbuf);
1299                 free(ir_test);
1300                 return ERROR_JTAG_INIT_FAILED;
1301         }
1302
1303         free(ir_test);
1304
1305         return ERROR_OK;
1306 }
1307
1308 int jtag_register_commands(struct command_context_s *cmd_ctx)
1309 {
1310         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1311                 COMMAND_CONFIG, NULL);
1312         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1313                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1314         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1315                 COMMAND_CONFIG, "jtag_device <ir_length> <ir_expected> <ir_mask>");
1316         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1317                 COMMAND_CONFIG, NULL);
1318         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
1319                 COMMAND_CONFIG, NULL);
1320         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
1321                 COMMAND_CONFIG, NULL);
1322
1323         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1324                 COMMAND_EXEC, "print current scan chain configuration");
1325
1326         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1327                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1328         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1329                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1330         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1331                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1332         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1333                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1334         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1335                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1336         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1337                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1338
1339         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1340                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1341         return ERROR_OK;
1342 }
1343
1344 int jtag_init(struct command_context_s *cmd_ctx)
1345 {
1346         int i, validate_tries = 0;
1347
1348         DEBUG("-");
1349
1350         if (jtag_speed == -1)
1351                 jtag_speed = 0;
1352
1353         if (jtag_interface && (jtag_interface[0] != 0))
1354                 /* configuration var 'jtag_interface' is set, and not empty */
1355                 for (i = 0; jtag_interfaces[i]; i++)
1356                 {
1357                         if (strcmp(jtag_interface, jtag_interfaces[i]->name) == 0)
1358                         {
1359                                 jtag_device_t *device;
1360                                 device = jtag_devices;
1361
1362                                 if (jtag_interfaces[i]->init() != ERROR_OK)
1363                                         return ERROR_JTAG_INIT_FAILED;
1364                                 jtag = jtag_interfaces[i];
1365
1366                                 jtag_ir_scan_size = 0;
1367                                 jtag_num_devices = 0;
1368                                 while (device != NULL)
1369                                 {
1370                                         jtag_ir_scan_size += device->ir_length;
1371                                         jtag_num_devices++;
1372                                         device = device->next;
1373                                 }
1374
1375                                 jtag_add_statemove(TAP_TLR);
1376                                 jtag_execute_queue();
1377
1378                                 /* examine chain first, as this could discover the real chain layout */
1379                                 if (jtag_examine_chain() != ERROR_OK)
1380                                 {
1381                                         ERROR("trying to validate configured JTAG chain anyway...");
1382                                 }
1383
1384                                 while (jtag_validate_chain() != ERROR_OK)
1385                                 {
1386                                         validate_tries++;
1387                                         if (validate_tries > 5)
1388                                         {
1389                                                 ERROR("Could not validate JTAG chain, exit");
1390                                                 jtag = NULL;
1391                                                 return ERROR_JTAG_INVALID_INTERFACE;
1392                                         }
1393                                         usleep(10000);
1394                                 }
1395
1396                                 return ERROR_OK;
1397                         }
1398                 }
1399
1400         /* no valid interface was found (i.e. the configuration option,
1401          * didn't match one of the compiled-in interfaces
1402          */
1403         ERROR("No valid jtag interface found (%s)", jtag_interface);
1404         ERROR("compiled-in jtag interfaces:");
1405         for (i = 0; jtag_interfaces[i]; i++)
1406         {
1407                 ERROR("%i: %s", i, jtag_interfaces[i]->name);
1408         }
1409
1410         jtag = NULL;
1411         return ERROR_JTAG_INVALID_INTERFACE;
1412 }
1413
1414 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1415 {
1416         int i;
1417
1418         /* only if the configuration var isn't overwritten from cmdline */
1419         if (!jtag_interface)
1420         {
1421                 if (args[0] && (args[0][0] != 0))
1422                 {
1423                         for (i=0; jtag_interfaces[i]; i++)
1424                         {
1425                                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1426                                 {
1427                                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1428                                                 exit(-1);
1429
1430                                         jtag_interface = jtag_interfaces[i]->name;
1431
1432                                         return ERROR_OK;
1433                                 }
1434                         }
1435                 }
1436
1437                 /* remember the requested interface name, so we can complain about it later */
1438                 jtag_interface = strdup(args[0]);
1439                 DEBUG("'interface' command didn't specify a valid interface");
1440         }
1441
1442         return ERROR_OK;
1443 }
1444
1445 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1446 {
1447         jtag_device_t **last_device_p = &jtag_devices;
1448
1449         if (*last_device_p)
1450         {
1451                 while ((*last_device_p)->next)
1452                         last_device_p = &((*last_device_p)->next);
1453                 last_device_p = &((*last_device_p)->next);
1454         }
1455
1456         if (argc < 3)
1457                 return ERROR_OK;
1458
1459         *last_device_p = malloc(sizeof(jtag_device_t));
1460         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1461
1462         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1463         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1464         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1465         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1466
1467         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1468         (*last_device_p)->bypass = 1;
1469         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1470
1471         (*last_device_p)->next = NULL;
1472
1473         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1474
1475         jtag_num_devices++;
1476
1477         return ERROR_OK;
1478 }
1479
1480 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1481 {
1482         jtag_device_t *device = jtag_devices;
1483         int device_count = 0;
1484
1485         while (device)
1486         {
1487                 u32 expected, expected_mask, cur_instr;
1488                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1489                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1490                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1491                 command_print(cmd_ctx, "%i: idcode: 0x%8.8x ir length %i, ir capture 0x%x, ir mask 0x%x, current instruction 0x%x", device_count, device->idcode, device->ir_length, expected, expected_mask, cur_instr);
1492                 device = device->next;
1493                 device_count++;
1494         }
1495
1496         return ERROR_OK;
1497 }
1498
1499 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1500 {
1501         if (argc >= 1)
1502         {
1503                 if (strcmp(args[0], "none") == 0)
1504                         jtag_reset_config = RESET_NONE;
1505                 else if (strcmp(args[0], "trst_only") == 0)
1506                         jtag_reset_config = RESET_HAS_TRST;
1507                 else if (strcmp(args[0], "srst_only") == 0)
1508                         jtag_reset_config = RESET_HAS_SRST;
1509                 else if (strcmp(args[0], "trst_and_srst") == 0)
1510                         jtag_reset_config = RESET_TRST_AND_SRST;
1511                 else
1512                 {
1513                         ERROR("invalid reset_config argument, defaulting to none");
1514                         jtag_reset_config = RESET_NONE;
1515                         return ERROR_INVALID_ARGUMENTS;
1516                 }
1517         }
1518
1519         if (argc >= 2)
1520         {
1521                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1522                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1523                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1524                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1525                 else if (strcmp(args[1], "combined") == 0)
1526                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1527                 else if (strcmp(args[1], "separate") == 0)
1528                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1529                 else
1530                 {
1531                         ERROR("invalid reset_config argument, defaulting to none");
1532                         jtag_reset_config = RESET_NONE;
1533                         return ERROR_INVALID_ARGUMENTS;
1534                 }
1535         }
1536
1537         if (argc >= 3)
1538         {
1539                 if (strcmp(args[2], "trst_open_drain") == 0)
1540                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1541                 else if (strcmp(args[2], "trst_push_pull") == 0)
1542                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1543                 else
1544                 {
1545                         ERROR("invalid reset_config argument, defaulting to none");
1546                         jtag_reset_config = RESET_NONE;
1547                         return ERROR_INVALID_ARGUMENTS;
1548                 }
1549         }
1550
1551         if (argc >= 4)
1552         {
1553                 if (strcmp(args[3], "srst_push_pull") == 0)
1554                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1555                 else if (strcmp(args[3], "srst_open_drain") == 0)
1556                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1557                 else
1558                 {
1559                         ERROR("invalid reset_config argument, defaulting to none");
1560                         jtag_reset_config = RESET_NONE;
1561                         return ERROR_INVALID_ARGUMENTS;
1562                 }
1563         }
1564
1565         return ERROR_OK;
1566 }
1567
1568 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1569 {
1570         if (argc < 1)
1571         {
1572                 ERROR("jtag_nsrst_delay <ms> command takes one required argument");
1573                 exit(-1);
1574         }
1575         else
1576         {
1577                 jtag_nsrst_delay = strtoul(args[0], NULL, 0);
1578         }
1579
1580         return ERROR_OK;
1581 }
1582
1583 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1584 {
1585         if (argc < 1)
1586         {
1587                 ERROR("jtag_ntrst_delay <ms> command takes one required argument");
1588                 exit(-1);
1589         }
1590         else
1591         {
1592                 jtag_ntrst_delay = strtoul(args[0], NULL, 0);
1593         }
1594
1595         return ERROR_OK;
1596 }
1597
1598 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1599 {
1600         if (argc == 0)
1601                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1602
1603         if (argc > 0)
1604         {
1605                 /* this command can be called during CONFIG,
1606                  * in which case jtag isn't initialized */
1607                 if (jtag)
1608                         jtag->speed(strtoul(args[0], NULL, 0));
1609                 else
1610                         jtag_speed = strtoul(args[0], NULL, 0);
1611         }
1612
1613         return ERROR_OK;
1614 }
1615
1616 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1617 {
1618         enum tap_state state;
1619
1620         if (argc < 1)
1621         {
1622                 command_print(cmd_ctx, "usage: endstate <tap_state>");
1623         }
1624         else
1625         {
1626                 for (state = 0; state < 16; state++)
1627                 {
1628                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1629                         {
1630                                 jtag_add_end_state(state);
1631                                 jtag_execute_queue();
1632                         }
1633                 }
1634         }
1635         command_print(cmd_ctx, "current endstate: %s", tap_state_strings[end_state]);
1636
1637         return ERROR_OK;
1638 }
1639
1640 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1641 {
1642         int trst = -1;
1643         int srst = -1;
1644         char *usage = "usage: jtag_reset <trst> <srst>";
1645         int retval;
1646
1647         if (argc < 1)
1648         {
1649                 command_print(cmd_ctx, usage);
1650                 return ERROR_OK;
1651         }
1652
1653         if (args[0][0] == '1')
1654                 trst = 1;
1655         else if (args[0][0] == '0')
1656                 trst = 0;
1657         else
1658         {
1659                 command_print(cmd_ctx, usage);
1660                 return ERROR_OK;
1661         }
1662
1663         if (args[1][0] == '1')
1664                 srst = 1;
1665         else if (args[1][0] == '0')
1666                 srst = 0;
1667         else
1668         {
1669                 command_print(cmd_ctx, usage);
1670                 return ERROR_OK;
1671         }
1672
1673         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1674         {
1675                 switch (retval)
1676                 {
1677                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1678                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1679                                 break;
1680                         case ERROR_JTAG_RESET_CANT_SRST:
1681                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1682                                 break;
1683                         default:
1684                                 command_print(cmd_ctx, "unknown error");
1685                 }
1686         }
1687         jtag_execute_queue();
1688
1689         return ERROR_OK;
1690 }
1691
1692 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1693 {
1694         if (argc < 1)
1695         {
1696                 command_print(cmd_ctx, "usage: runtest <num_cycles>");
1697                 return ERROR_OK;
1698         }
1699
1700         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1701         jtag_execute_queue();
1702
1703         return ERROR_OK;
1704
1705 }
1706
1707 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1708 {
1709         enum tap_state state;
1710
1711         state = -1;
1712         if (argc == 1)
1713         {
1714                 for (state = 0; state < 16; state++)
1715                 {
1716                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1717                         {
1718                                 break;
1719                         }
1720                 }
1721         }
1722
1723         jtag_add_statemove(state);
1724         jtag_execute_queue();
1725
1726         return ERROR_OK;
1727
1728 }
1729
1730 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1731 {
1732         int i;
1733         scan_field_t *fields;
1734
1735         if ((argc < 2) || (argc % 2))
1736         {
1737                 command_print(cmd_ctx, "usage: irscan <device> <instr> [dev2] [instr2] ...");
1738                 return ERROR_OK;
1739         }
1740
1741         fields = malloc(sizeof(scan_field_t) * argc / 2);
1742
1743         for (i = 0; i < argc / 2; i++)
1744         {
1745                 int device = strtoul(args[i*2], NULL, 0);
1746                 int field_size = jtag_get_device(device)->ir_length;
1747                 fields[i].device = device;
1748                 fields[i].out_value = malloc(CEIL(field_size, 8));
1749                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1750                 fields[i].out_mask = NULL;
1751                 fields[i].in_value = NULL;
1752                 fields[i].in_check_mask = NULL;
1753                 fields[i].in_handler = NULL;
1754                 fields[i].in_handler_priv = NULL;
1755         }
1756
1757         jtag_add_ir_scan(argc / 2, fields, -1, NULL);
1758         jtag_execute_queue();
1759
1760         for (i = 0; i < argc / 2; i++)
1761                 free(fields[i].out_value);
1762
1763         free (fields);
1764
1765         return ERROR_OK;
1766 }
1767
1768 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1769 {
1770         scan_field_t *fields;
1771         int num_fields = 0;
1772         int field_count = 0;
1773         var_t *var;
1774         int i, j;
1775
1776         if ((argc < 2) || (argc % 2))
1777         {
1778                 command_print(cmd_ctx, "usage: drscan <device> <var> [dev2] [var2]");
1779                 return ERROR_OK;
1780         }
1781
1782         for (i = 0; i < argc; i+=2)
1783         {
1784                 var = get_var_by_namenum(args[i+1]);
1785                 if (var)
1786                 {
1787                         num_fields += var->num_fields;
1788                 }
1789                 else
1790                 {
1791                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1792                         return ERROR_OK;
1793                 }
1794         }
1795
1796         fields = malloc(sizeof(scan_field_t) * num_fields);
1797
1798         for (i = 0; i < argc; i+=2)
1799         {
1800                 var = get_var_by_namenum(args[i+1]);
1801
1802                 for (j = 0; j < var->num_fields; j++)
1803                 {
1804                         fields[field_count].device = strtol(args[i], NULL, 0);
1805                         fields[field_count].num_bits = var->fields[j].num_bits;
1806                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1807                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1808                         fields[field_count].out_mask = NULL;
1809                         fields[field_count].in_value = fields[field_count].out_value;
1810                         fields[field_count].in_check_mask = NULL;
1811                         fields[field_count].in_check_value = NULL;
1812                         fields[field_count].in_handler = field_le_to_host;
1813                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1814                 }
1815         }
1816
1817         jtag_add_dr_scan(num_fields, fields, -1, NULL);
1818         jtag_execute_queue();
1819
1820         for (i = 0; i < argc / 2; i++)
1821                 free(fields[i].out_value);
1822
1823         free(fields);
1824
1825         return ERROR_OK;
1826 }
1827
1828 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1829 {
1830         if (argc == 0)
1831         {
1832                 command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1833                 return ERROR_OK;
1834         }
1835
1836         if (strcmp(args[0], "enable") == 0)
1837         {
1838                 jtag_verify_capture_ir = 1;
1839         }
1840         else if (strcmp(args[0], "disable") == 0)
1841         {
1842                 jtag_verify_capture_ir = 0;
1843         }
1844
1845         return ERROR_OK;
1846 }