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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 jtag_interface_t *jtag_interface = NULL;
 208 int jtag_speed = 0;
 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)
 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)
 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)
 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
 629 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 630 {
 631         int i;
 632         jtag_command_t **last_cmd = jtag_get_last_command_p();
 633
 634         if (jtag_trst == 1)
 635         {
 636                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 637                 return ERROR_JTAG_TRST_ASSERTED;
 638         }
 639
 640         /* allocate memory for a new list member */
 641         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 642         last_comand_pointer = &((*last_cmd)->next);
 643         (*last_cmd)->next = NULL;
 644         (*last_cmd)->type = JTAG_SCAN;
 645
 646         /* allocate memory for scan command */
 647         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 648         (*last_cmd)->cmd.scan->ir_scan = 0;
 649         (*last_cmd)->cmd.scan->num_fields = num_fields;
 650         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 651         (*last_cmd)->cmd.scan->end_state = state;
 652
 653         if (state != -1)
 654                 cmd_queue_end_state = state;
 655
 656         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 657                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 658
 659         if (cmd_queue_end_state == TAP_TLR)
 660                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 661
 662         cmd_queue_cur_state = cmd_queue_end_state;
 663
 664         for (i = 0; i < num_fields; i++)
 665         {
 666                 int num_bits = fields[i].num_bits;
 667                 int num_bytes = CEIL(fields[i].num_bits, 8);
 668                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 669                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 670                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 671                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 672                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 673                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 674                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 675                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 676                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 677         }
 678
 679         return ERROR_OK;
 680 }
 681 int jtag_add_statemove(enum tap_state state)
 682 {
 683         jtag_command_t **last_cmd = jtag_get_last_command_p();
 684
 685         if (jtag_trst == 1)
 686         {
 687                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 688                 return ERROR_JTAG_TRST_ASSERTED;
 689         }
 690
 691         /* allocate memory for a new list member */
 692         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 693         last_comand_pointer = &((*last_cmd)->next);
 694         (*last_cmd)->next = NULL;
 695         (*last_cmd)->type = JTAG_STATEMOVE;
 696
 697         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 698         (*last_cmd)->cmd.statemove->end_state = state;
 699
 700         if (state != -1)
 701                 cmd_queue_end_state = state;
 702
 703         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 704                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 705
 706         if (cmd_queue_end_state == TAP_TLR)
 707                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 708
 709         cmd_queue_cur_state = cmd_queue_end_state;
 710
 711         return ERROR_OK;
 712 }
 713
 714 int jtag_add_pathmove(int num_states, enum tap_state *path)
 715 {
 716         jtag_command_t **last_cmd = jtag_get_last_command_p();
 717         int i;
 718
 719         if (jtag_trst == 1)
 720         {
 721                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 722                 return ERROR_JTAG_TRST_ASSERTED;
 723         }
 724
 725         /* the last state has to be a stable state */
 726         if (tap_move_map[path[num_states - 1]] == -1)
 727         {
 728                 ERROR("TAP path doesn't finish in a stable state");
 729                 return ERROR_JTAG_NOT_IMPLEMENTED;
 730         }
 731
 732         /* allocate memory for a new list member */
 733         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 734         last_comand_pointer = &((*last_cmd)->next);
 735         (*last_cmd)->next = NULL;
 736         (*last_cmd)->type = JTAG_PATHMOVE;
 737
 738         (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 739         (*last_cmd)->cmd.pathmove->num_states = num_states;
 740         (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 741
 742         for (i = 0; i < num_states; i++)
 743                 (*last_cmd)->cmd.pathmove->path[i] = path[i];
 744
 745         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 746                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 747
 748         if (cmd_queue_end_state == TAP_TLR)
 749                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 750
 751         cmd_queue_cur_state = path[num_states - 1];
 752
 753         return ERROR_OK;
 754 }
 755
 756 int jtag_add_runtest(int num_cycles, enum tap_state state)
 757 {
 758         jtag_command_t **last_cmd = jtag_get_last_command_p();
 759
 760         if (jtag_trst == 1)
 761         {
 762                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 763                 return ERROR_JTAG_TRST_ASSERTED;
 764         }
 765
 766         /* allocate memory for a new list member */
 767         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 768         (*last_cmd)->next = NULL;
 769         last_comand_pointer = &((*last_cmd)->next);
 770         (*last_cmd)->type = JTAG_RUNTEST;
 771
 772         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 773         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 774         (*last_cmd)->cmd.runtest->end_state = state;
 775
 776         if (state != -1)
 777                 cmd_queue_end_state = state;
 778
 779         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 780                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 781
 782         if (cmd_queue_end_state == TAP_TLR)
 783                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 784
 785         cmd_queue_cur_state = cmd_queue_end_state;
 786
 787         return ERROR_OK;
 788 }
 789
 790 int jtag_add_reset(int req_trst, int req_srst)
 791 {
 792         int trst_with_tms = 0;
 793
 794         jtag_command_t **last_cmd = jtag_get_last_command_p();
 795
 796         if (req_trst == -1)
 797                 req_trst = jtag_trst;
 798
 799         if (req_srst == -1)
 800                 req_srst = jtag_srst;
 801
 802         /* Make sure that jtag_reset_config allows the requested reset */
 803         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 804         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 805                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 806
 807         /* if TRST pulls SRST, we reset with TAP T-L-R */
 808         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 809         {
 810                 req_trst = 0;
 811                 trst_with_tms = 1;
 812         }
 813
 814         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 815         {
 816                 ERROR("requested nSRST assertion, but the current configuration doesn't support this");
 817                 return ERROR_JTAG_RESET_CANT_SRST;
 818         }
 819
 820         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 821         {
 822                 req_trst = 0;
 823                 trst_with_tms = 1;
 824         }
 825
 826         /* allocate memory for a new list member */
 827         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 828         (*last_cmd)->next = NULL;
 829         last_comand_pointer = &((*last_cmd)->next);
 830         (*last_cmd)->type = JTAG_RESET;
 831
 832         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 833         (*last_cmd)->cmd.reset->trst = req_trst;
 834         (*last_cmd)->cmd.reset->srst = req_srst;
 835
 836         jtag_trst = req_trst;
 837         jtag_srst = req_srst;
 838
 839         if (jtag_srst)
 840         {
 841                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 842         }
 843         else
 844         {
 845                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 846                 if (jtag_nsrst_delay)
 847                         jtag_add_sleep(jtag_nsrst_delay * 1000);
 848         }
 849
 850         if (trst_with_tms)
 851         {
 852                 last_cmd = &((*last_cmd)->next);
 853
 854                 /* allocate memory for a new list member */
 855                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 856                 (*last_cmd)->next = NULL;
 857                 last_comand_pointer = &((*last_cmd)->next);
 858                 (*last_cmd)->type = JTAG_STATEMOVE;
 859
 860                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 861                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 862
 863                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 864                 cmd_queue_cur_state = TAP_TLR;
 865                 cmd_queue_end_state = TAP_TLR;
 866
 867                 return ERROR_OK;
 868         }
 869         else
 870         {
 871                 if (jtag_trst)
 872                 {
 873                         /* we just asserted nTRST, so we're now in Test-Logic-Reset,
 874                          * and inform possible listeners about this
 875                          */
 876                         cmd_queue_cur_state = TAP_TLR;
 877                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 878                 }
 879                 else
 880                 {
 881                         /* the nTRST line got deasserted, so we're still in Test-Logic-Reset,
 882                          * but we might want to add a delay to give the TAP time to settle
 883                          */
 884                         if (jtag_ntrst_delay)
 885                                 jtag_add_sleep(jtag_ntrst_delay * 1000);
 886                 }
 887         }
 888
 889         return ERROR_OK;
 890 }
 891
 892 int jtag_add_end_state(enum tap_state state)
 893 {
 894         jtag_command_t **last_cmd = jtag_get_last_command_p();
 895
 896         /* allocate memory for a new list member */
 897         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 898         (*last_cmd)->next = NULL;
 899         last_comand_pointer = &((*last_cmd)->next);
 900         (*last_cmd)->type = JTAG_END_STATE;
 901
 902         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 903         (*last_cmd)->cmd.end_state->end_state = state;
 904
 905         if (state != -1)
 906                 cmd_queue_end_state = state;
 907
 908         return ERROR_OK;
 909 }
 910
 911 int jtag_add_sleep(u32 us)
 912 {
 913         jtag_command_t **last_cmd = jtag_get_last_command_p();
 914
 915         /* allocate memory for a new list member */
 916         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 917         (*last_cmd)->next = NULL;
 918         last_comand_pointer = &((*last_cmd)->next);
 919         (*last_cmd)->type = JTAG_SLEEP;
 920
 921         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 922         (*last_cmd)->cmd.sleep->us = us;
 923
 924         return ERROR_OK;
 925 }
 926
 927 int jtag_scan_size(scan_command_t *cmd)
 928 {
 929         int bit_count = 0;
 930         int i;
 931
 932         /* count bits in scan command */
 933         for (i = 0; i < cmd->num_fields; i++)
 934         {
 935                 bit_count += cmd->fields[i].num_bits;
 936         }
 937
 938         return bit_count;
 939 }
 940
 941 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 942 {
 943         int bit_count = 0;
 944         int i;
 945
 946         bit_count = jtag_scan_size(cmd);
 947         *buffer = malloc(CEIL(bit_count, 8));
 948
 949         bit_count = 0;
 950
 951         for (i = 0; i < cmd->num_fields; i++)
 952         {
 953                 if (cmd->fields[i].out_value)
 954                 {
 955 #ifdef _DEBUG_JTAG_IO_
 956                         char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > 64) ? 64 : cmd->fields[i].num_bits, 16);
 957 #endif
 958                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
 959 #ifdef _DEBUG_JTAG_IO_
 960                         DEBUG("fields[%i].out_value: 0x%s", i, char_buf);
 961                         free(char_buf);
 962 #endif
 963                 }
 964
 965                 bit_count += cmd->fields[i].num_bits;
 966         }
 967
 968         return bit_count;
 969
 970 }
 971
 972 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
 973 {
 974         int i;
 975         int bit_count = 0;
 976         int retval;
 977
 978         /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
 979         retval = ERROR_OK;
 980
 981         for (i = 0; i < cmd->num_fields; i++)
 982         {
 983                 /* if neither in_value nor in_handler
 984                  * are specified we don't have to examine this field
 985                  */
 986                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
 987                 {
 988                         int num_bits = cmd->fields[i].num_bits;
 989                         u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
 990
 991 #ifdef _DEBUG_JTAG_IO_
 992                         char *char_buf;
 993
 994                         char_buf = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
 995                         DEBUG("fields[%i].in_value: 0x%s", i, char_buf);
 996                         free(char_buf);
 997 #endif
 998
 999                         if (cmd->fields[i].in_value)
1000                         {
1001                                 buf_cpy(captured, cmd->fields[i].in_value, num_bits);
1002
1003                                 if (cmd->fields[i].in_handler)
1004                                 {
1005                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1006                                         {
1007                                                 WARNING("in_handler reported a failed check");
1008                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1009                                         }
1010                                 }
1011                         }
1012
1013                         /* no in_value specified, but a handler takes care of the scanned data */
1014                         if (cmd->fields[i].in_handler && (!cmd->fields[i].in_value))
1015                         {
1016                                 if (cmd->fields[i].in_handler(captured, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1017                                 {
1018                                         /* We're going to call the error:handler later, but if the in_handler
1019                                          * reported an error we report this failure upstream
1020                                          */
1021                                         WARNING("in_handler reported a failed check");
1022                                         retval = ERROR_JTAG_QUEUE_FAILED;
1023                                 }
1024                         }
1025
1026                         free(captured);
1027                 }
1028                 bit_count += cmd->fields[i].num_bits;
1029         }
1030
1031         return retval;
1032 }
1033
1034 int jtag_check_value(u8 *captured, void *priv, scan_field_t *field)
1035 {
1036         int retval = ERROR_OK;
1037         int num_bits = field->num_bits;
1038
1039         int compare_failed = 0;
1040
1041         if (field->in_check_mask)
1042                 compare_failed = buf_cmp_mask(captured, field->in_check_value, field->in_check_mask, num_bits);
1043         else
1044                 compare_failed = buf_cmp(captured, field->in_check_value, num_bits);
1045
1046         if (compare_failed)
1047                 {
1048                 /* An error handler could have caught the failing check
1049                  * only report a problem when there wasn't a handler, or if the handler
1050                  * acknowledged the error
1051                  */
1052                 if (compare_failed)
1053                 {
1054                         char *captured_char = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1055                         char *in_check_value_char = buf_to_str(field->in_check_value, (num_bits > 64) ? 64 : num_bits, 16);
1056
1057                         if (field->in_check_mask)
1058                         {
1059                                 char *in_check_mask_char;
1060                                 in_check_mask_char = buf_to_str(field->in_check_mask, (num_bits > 64) ? 64 : num_bits, 16);
1061                                 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);
1062                                 free(in_check_mask_char);
1063                         }
1064                         else
1065                         {
1066                                 WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
1067                         }
1068
1069                         free(captured_char);
1070                         free(in_check_value_char);
1071
1072                         retval = ERROR_JTAG_QUEUE_FAILED;
1073                 }
1074
1075         }
1076         return retval;
1077 }
1078
1079 /*
1080   set up checking of this field using the in_handler. The values passed in must be valid until
1081   after jtag_execute() has completed.
1082  */
1083 void jtag_set_check_value(scan_field_t *field, u8 *value, u8 *mask, error_handler_t *in_error_handler)
1084 {
1085         if (value)
1086                 field->in_handler = jtag_check_value;
1087         else
1088                 field->in_handler = NULL;       /* No check, e.g. embeddedice uses value==NULL to indicate no check */
1089         field->in_handler_priv = NULL;  /* this will be filled in at the invocation site to point to the field duplicate */
1090         field->in_check_value = value;
1091         field->in_check_mask = mask;
1092 }
1093
1094 enum scan_type jtag_scan_type(scan_command_t *cmd)
1095 {
1096         int i;
1097         int type = 0;
1098
1099         for (i = 0; i < cmd->num_fields; i++)
1100         {
1101                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
1102                         type |= SCAN_IN;
1103                 if (cmd->fields[i].out_value)
1104                         type |= SCAN_OUT;
1105         }
1106
1107         return type;
1108 }
1109
1110 int jtag_execute_queue(void)
1111 {
1112         int retval;
1113
1114         retval = jtag->execute_queue();
1115
1116         cmd_queue_free();
1117
1118         jtag_command_queue = NULL;
1119         last_comand_pointer = &jtag_command_queue;
1120
1121         return retval;
1122 }
1123
1124 int jtag_reset_callback(enum jtag_event event, void *priv)
1125 {
1126         jtag_device_t *device = priv;
1127
1128         DEBUG("-");
1129
1130         if (event == JTAG_TRST_ASSERTED)
1131         {
1132                 buf_set_ones(device->cur_instr, device->ir_length);
1133                 device->bypass = 1;
1134         }
1135
1136         return ERROR_OK;
1137 }
1138
1139 void jtag_sleep(u32 us)
1140 {
1141         usleep(us);
1142 }
1143
1144 /* Try to examine chain layout according to IEEE 1149.1 §12
1145  */
1146 int jtag_examine_chain()
1147 {
1148         jtag_device_t *device = jtag_devices;
1149         scan_field_t field;
1150         u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
1151         int i;
1152         int bit_count;
1153         int device_count = 0;
1154         u8 zero_check = 0x0;
1155         u8 one_check = 0xff;
1156
1157         field.device = 0;
1158         field.num_bits = sizeof(idcode_buffer) * 8;
1159         field.out_value = idcode_buffer;
1160         field.out_mask = NULL;
1161         field.in_value = idcode_buffer;
1162         field.in_check_value = NULL;
1163         field.in_check_mask = NULL;
1164         field.in_handler = NULL;
1165         field.in_handler_priv = NULL;
1166
1167         for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
1168         {
1169                 buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
1170         }
1171
1172         jtag_add_plain_dr_scan(1, &field, TAP_TLR);
1173         jtag_execute_queue();
1174
1175         for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++)
1176         {
1177                 zero_check |= idcode_buffer[i];
1178                 one_check &= idcode_buffer[i];
1179         }
1180
1181         /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */
1182         if ((zero_check == 0x00) || (one_check == 0xff))
1183         {
1184                 ERROR("JTAG communication failure, check connection, JTAG interface, target power etc.");
1185                 return ERROR_JTAG_INIT_FAILED;
1186         }
1187
1188         for (bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
1189         {
1190                 u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
1191                 if ((idcode & 1) == 0)
1192                 {
1193                         /* LSB must not be 0, this indicates a device in bypass */
1194                         device_count++;
1195
1196                         bit_count += 1;
1197                 }
1198                 else
1199                 {
1200                         u32 manufacturer;
1201                         u32 part;
1202                         u32 version;
1203
1204                         if (idcode == 0x000000FF)
1205                         {
1206                                 /* End of chain (invalid manufacturer ID) */
1207                                 break;
1208                         }
1209
1210                         if (device)
1211                         {
1212                                 device->idcode = idcode;
1213                                 device = device->next;
1214                         }
1215                         device_count++;
1216
1217                         manufacturer = (idcode & 0xffe) >> 1;
1218                         part = (idcode & 0xffff000) >> 12;
1219                         version = (idcode & 0xf0000000) >> 28;
1220
1221                         INFO("JTAG device found: 0x%8.8x (Manufacturer: 0x%3.3x, Part: 0x%4.4x, Version: 0x%1.1x)",
1222                                 idcode, manufacturer, part, version);
1223
1224                         bit_count += 32;
1225                 }
1226         }
1227
1228         /* see if number of discovered devices matches configuration */
1229         if (device_count != jtag_num_devices)
1230         {
1231                 ERROR("number of discovered devices in JTAG chain (%i) doesn't match configuration (%i)",
1232                         device_count, jtag_num_devices);
1233                 ERROR("check the config file and ensure proper JTAG communication (connections, speed, ...)");
1234                 return ERROR_JTAG_INIT_FAILED;
1235         }
1236
1237         return ERROR_OK;
1238 }
1239
1240 int jtag_validate_chain()
1241 {
1242         jtag_device_t *device = jtag_devices;
1243         int total_ir_length = 0;
1244         u8 *ir_test = NULL;
1245         scan_field_t field;
1246         int chain_pos = 0;
1247
1248         while (device)
1249         {
1250                 total_ir_length += device->ir_length;
1251                 device = device->next;
1252         }
1253
1254         total_ir_length += 2;
1255         ir_test = malloc(CEIL(total_ir_length, 8));
1256         buf_set_ones(ir_test, total_ir_length);
1257
1258         field.device = 0;
1259         field.num_bits = total_ir_length;
1260         field.out_value = ir_test;
1261         field.out_mask = NULL;
1262         field.in_value = ir_test;
1263         field.in_check_value = NULL;
1264         field.in_check_mask = NULL;
1265         field.in_handler = NULL;
1266         field.in_handler_priv = NULL;
1267
1268         jtag_add_plain_ir_scan(1, &field, TAP_TLR);
1269         jtag_execute_queue();
1270
1271         device = jtag_devices;
1272         while (device)
1273         {
1274                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1275                 {
1276                         char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1277                         ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1278                         free(cbuf);
1279                         free(ir_test);
1280                         return ERROR_JTAG_INIT_FAILED;
1281                 }
1282                 chain_pos += device->ir_length;
1283                 device = device->next;
1284         }
1285
1286         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1287         {
1288                 char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1289                 ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1290                 free(cbuf);
1291                 free(ir_test);
1292                 return ERROR_JTAG_INIT_FAILED;
1293         }
1294
1295         free(ir_test);
1296
1297         return ERROR_OK;
1298 }
1299
1300 int jtag_register_commands(struct command_context_s *cmd_ctx)
1301 {
1302         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1303                 COMMAND_CONFIG, NULL);
1304         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1305                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1306         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1307                 COMMAND_CONFIG, "jtag_device <ir_length> <ir_expected> <ir_mask>");
1308         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1309                 COMMAND_CONFIG, NULL);
1310         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
1311                 COMMAND_CONFIG, NULL);
1312         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
1313                 COMMAND_CONFIG, NULL);
1314
1315         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1316                 COMMAND_EXEC, "print current scan chain configuration");
1317
1318         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1319                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1320         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1321                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1322         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1323                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1324         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1325                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1326         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1327                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1328         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1329                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1330
1331         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1332                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1333         return ERROR_OK;
1334 }
1335
1336 int jtag_interface_init(struct command_context_s *cmd_ctx)
1337 {
1338         if (!jtag_interface)
1339         {
1340                 /* nothing was previously specified by "interface" command */
1341                 ERROR("JTAG interface has to be specified, see \"interface\" command");
1342                 return ERROR_JTAG_INVALID_INTERFACE;
1343         }
1344
1345         if (jtag_interface->init() != ERROR_OK)
1346                 return ERROR_JTAG_INIT_FAILED;
1347
1348         jtag = jtag_interface;
1349         return ERROR_OK;
1350 }
1351
1352 int jtag_init(struct command_context_s *cmd_ctx)
1353 {
1354         int i, validate_tries = 0;
1355         jtag_device_t *device;
1356
1357         DEBUG("-");
1358
1359         if (!jtag && jtag_interface_init(cmd_ctx) != ERROR_OK)
1360                 return ERROR_JTAG_INIT_FAILED;
1361
1362         device = jtag_devices;
1363         jtag_ir_scan_size = 0;
1364         jtag_num_devices = 0;
1365         while (device != NULL)
1366         {
1367                 jtag_ir_scan_size += device->ir_length;
1368                 jtag_num_devices++;
1369                 device = device->next;
1370         }
1371
1372         jtag_add_statemove(TAP_TLR);
1373         jtag_execute_queue();
1374
1375         /* examine chain first, as this could discover the real chain layout */
1376         if (jtag_examine_chain() != ERROR_OK)
1377         {
1378                 ERROR("trying to validate configured JTAG chain anyway...");
1379         }
1380
1381         while (jtag_validate_chain() != ERROR_OK)
1382         {
1383                 validate_tries++;
1384                 if (validate_tries > 5)
1385                 {
1386                         ERROR("Could not validate JTAG chain, exit");
1387                         jtag = NULL;
1388                         return ERROR_JTAG_INVALID_INTERFACE;
1389                 }
1390                 usleep(10000);
1391         }
1392
1393         return ERROR_OK;
1394 }
1395
1396 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1397 {
1398         int i;
1399
1400         /* check whether the interface is already configured */
1401         if (jtag_interface)
1402         {
1403                 WARNING("Interface already configured, ignoring");
1404                 return ERROR_OK;
1405         }
1406
1407         /* interface name is a mandatory argument */
1408         if (argc < 1 || args[0][0] == '\0')
1409         {
1410                 return ERROR_COMMAND_SYNTAX_ERROR;
1411         }
1412
1413         for (i=0; jtag_interfaces[i]; i++)
1414         {
1415                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1416                 {
1417                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1418                                 exit(-1);
1419
1420                         jtag_interface = jtag_interfaces[i];
1421                         return ERROR_OK;
1422                 }
1423         }
1424
1425         /* no valid interface was found (i.e. the configuration option,
1426          * didn't match one of the compiled-in interfaces
1427          */
1428         ERROR("No valid jtag interface found (%s)", args[0]);
1429         ERROR("compiled-in jtag interfaces:");
1430         for (i = 0; jtag_interfaces[i]; i++)
1431         {
1432                 ERROR("%i: %s", i, jtag_interfaces[i]->name);
1433         }
1434
1435         return ERROR_JTAG_INVALID_INTERFACE;
1436 }
1437
1438 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1439 {
1440         jtag_device_t **last_device_p = &jtag_devices;
1441
1442         if (*last_device_p)
1443         {
1444                 while ((*last_device_p)->next)
1445                         last_device_p = &((*last_device_p)->next);
1446                 last_device_p = &((*last_device_p)->next);
1447         }
1448
1449         if (argc < 3)
1450                 return ERROR_OK;
1451
1452         *last_device_p = malloc(sizeof(jtag_device_t));
1453         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1454
1455         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1456         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1457         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1458         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1459
1460         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1461         (*last_device_p)->bypass = 1;
1462         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1463
1464         (*last_device_p)->next = NULL;
1465
1466         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1467
1468         jtag_num_devices++;
1469
1470         return ERROR_OK;
1471 }
1472
1473 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1474 {
1475         jtag_device_t *device = jtag_devices;
1476         int device_count = 0;
1477
1478         while (device)
1479         {
1480                 u32 expected, expected_mask, cur_instr;
1481                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1482                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1483                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1484                 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);
1485                 device = device->next;
1486                 device_count++;
1487         }
1488
1489         return ERROR_OK;
1490 }
1491
1492 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1493 {
1494         if (argc >= 1)
1495         {
1496                 if (strcmp(args[0], "none") == 0)
1497                         jtag_reset_config = RESET_NONE;
1498                 else if (strcmp(args[0], "trst_only") == 0)
1499                         jtag_reset_config = RESET_HAS_TRST;
1500                 else if (strcmp(args[0], "srst_only") == 0)
1501                         jtag_reset_config = RESET_HAS_SRST;
1502                 else if (strcmp(args[0], "trst_and_srst") == 0)
1503                         jtag_reset_config = RESET_TRST_AND_SRST;
1504                 else
1505                 {
1506                         ERROR("invalid reset_config argument, defaulting to none");
1507                         jtag_reset_config = RESET_NONE;
1508                         return ERROR_INVALID_ARGUMENTS;
1509                 }
1510         }
1511
1512         if (argc >= 2)
1513         {
1514                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1515                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1516                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1517                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1518                 else if (strcmp(args[1], "combined") == 0)
1519                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1520                 else if (strcmp(args[1], "separate") == 0)
1521                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1522                 else
1523                 {
1524                         ERROR("invalid reset_config argument, defaulting to none");
1525                         jtag_reset_config = RESET_NONE;
1526                         return ERROR_INVALID_ARGUMENTS;
1527                 }
1528         }
1529
1530         if (argc >= 3)
1531         {
1532                 if (strcmp(args[2], "trst_open_drain") == 0)
1533                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1534                 else if (strcmp(args[2], "trst_push_pull") == 0)
1535                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1536                 else
1537                 {
1538                         ERROR("invalid reset_config argument, defaulting to none");
1539                         jtag_reset_config = RESET_NONE;
1540                         return ERROR_INVALID_ARGUMENTS;
1541                 }
1542         }
1543
1544         if (argc >= 4)
1545         {
1546                 if (strcmp(args[3], "srst_push_pull") == 0)
1547                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1548                 else if (strcmp(args[3], "srst_open_drain") == 0)
1549                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1550                 else
1551                 {
1552                         ERROR("invalid reset_config argument, defaulting to none");
1553                         jtag_reset_config = RESET_NONE;
1554                         return ERROR_INVALID_ARGUMENTS;
1555                 }
1556         }
1557
1558         return ERROR_OK;
1559 }
1560
1561 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1562 {
1563         if (argc < 1)
1564         {
1565                 ERROR("jtag_nsrst_delay <ms> command takes one required argument");
1566                 exit(-1);
1567         }
1568         else
1569         {
1570                 jtag_nsrst_delay = strtoul(args[0], NULL, 0);
1571         }
1572
1573         return ERROR_OK;
1574 }
1575
1576 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1577 {
1578         if (argc < 1)
1579         {
1580                 ERROR("jtag_ntrst_delay <ms> command takes one required argument");
1581                 exit(-1);
1582         }
1583         else
1584         {
1585                 jtag_ntrst_delay = strtoul(args[0], NULL, 0);
1586         }
1587
1588         return ERROR_OK;
1589 }
1590
1591 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1592 {
1593         if (argc == 0)
1594                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1595
1596         if (argc > 0)
1597         {
1598                 /* this command can be called during CONFIG,
1599                  * in which case jtag isn't initialized */
1600                 if (jtag)
1601                         jtag->speed(strtoul(args[0], NULL, 0));
1602                 else
1603                         jtag_speed = strtoul(args[0], NULL, 0);
1604         }
1605
1606         return ERROR_OK;
1607 }
1608
1609 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1610 {
1611         enum tap_state state;
1612
1613         if (argc < 1)
1614         {
1615                 return ERROR_COMMAND_SYNTAX_ERROR;
1616         }
1617         else
1618         {
1619                 for (state = 0; state < 16; state++)
1620                 {
1621                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1622                         {
1623                                 jtag_add_end_state(state);
1624                                 jtag_execute_queue();
1625                         }
1626                 }
1627         }
1628         command_print(cmd_ctx, "current endstate: %s", tap_state_strings[end_state]);
1629
1630         return ERROR_OK;
1631 }
1632
1633 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1634 {
1635         int trst = -1;
1636         int srst = -1;
1637         int retval;
1638
1639         if (argc < 2)
1640         {
1641                 return ERROR_COMMAND_SYNTAX_ERROR;
1642
1643         }
1644
1645         if (args[0][0] == '1')
1646                 trst = 1;
1647         else if (args[0][0] == '0')
1648                 trst = 0;
1649         else
1650         {
1651                 return ERROR_COMMAND_SYNTAX_ERROR;
1652         }
1653
1654         if (args[1][0] == '1')
1655                 srst = 1;
1656         else if (args[1][0] == '0')
1657                 srst = 0;
1658         else
1659         {
1660                 return ERROR_COMMAND_SYNTAX_ERROR;
1661         }
1662
1663         if (!jtag && jtag_interface_init(cmd_ctx) != ERROR_OK)
1664                 return ERROR_JTAG_INIT_FAILED;
1665
1666         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1667         {
1668                 switch (retval)
1669                 {
1670                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1671                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1672                                 break;
1673                         case ERROR_JTAG_RESET_CANT_SRST:
1674                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1675                                 break;
1676                         default:
1677                                 command_print(cmd_ctx, "unknown error");
1678                 }
1679         }
1680         jtag_execute_queue();
1681
1682         return ERROR_OK;
1683 }
1684
1685 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1686 {
1687         if (argc < 1)
1688         {
1689                 return ERROR_COMMAND_SYNTAX_ERROR;
1690         }
1691
1692         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1693         jtag_execute_queue();
1694
1695         return ERROR_OK;
1696
1697 }
1698
1699 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1700 {
1701         enum tap_state state;
1702
1703         state = -1;
1704         if (argc == 1)
1705         {
1706                 for (state = 0; state < 16; state++)
1707                 {
1708                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1709                         {
1710                                 break;
1711                         }
1712                 }
1713         }
1714
1715         jtag_add_statemove(state);
1716         jtag_execute_queue();
1717
1718         return ERROR_OK;
1719
1720 }
1721
1722 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1723 {
1724         int i;
1725         scan_field_t *fields;
1726
1727         if ((argc < 2) || (argc % 2))
1728         {
1729                 return ERROR_COMMAND_SYNTAX_ERROR;
1730         }
1731
1732         fields = malloc(sizeof(scan_field_t) * argc / 2);
1733
1734         for (i = 0; i < argc / 2; i++)
1735         {
1736                 int device = strtoul(args[i*2], NULL, 0);
1737                 int field_size = jtag_get_device(device)->ir_length;
1738                 fields[i].device = device;
1739                 fields[i].out_value = malloc(CEIL(field_size, 8));
1740                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1741                 fields[i].out_mask = NULL;
1742                 fields[i].in_value = NULL;
1743                 fields[i].in_check_mask = NULL;
1744                 fields[i].in_handler = NULL;
1745                 fields[i].in_handler_priv = NULL;
1746         }
1747
1748         jtag_add_ir_scan(argc / 2, fields, -1);
1749         jtag_execute_queue();
1750
1751         for (i = 0; i < argc / 2; i++)
1752                 free(fields[i].out_value);
1753
1754         free (fields);
1755
1756         return ERROR_OK;
1757 }
1758
1759 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1760 {
1761         scan_field_t *fields;
1762         int num_fields = 0;
1763         int field_count = 0;
1764         var_t *var;
1765         int i, j;
1766
1767         if ((argc < 2) || (argc % 2))
1768         {
1769                 return ERROR_COMMAND_SYNTAX_ERROR;
1770         }
1771
1772         for (i = 0; i < argc; i+=2)
1773         {
1774                 var = get_var_by_namenum(args[i+1]);
1775                 if (var)
1776                 {
1777                         num_fields += var->num_fields;
1778                 }
1779                 else
1780                 {
1781                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1782                         return ERROR_OK;
1783                 }
1784         }
1785
1786         fields = malloc(sizeof(scan_field_t) * num_fields);
1787
1788         for (i = 0; i < argc; i+=2)
1789         {
1790                 var = get_var_by_namenum(args[i+1]);
1791
1792                 for (j = 0; j < var->num_fields; j++)
1793                 {
1794                         fields[field_count].device = strtol(args[i], NULL, 0);
1795                         fields[field_count].num_bits = var->fields[j].num_bits;
1796                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1797                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1798                         fields[field_count].out_mask = NULL;
1799                         fields[field_count].in_value = fields[field_count].out_value;
1800                         fields[field_count].in_check_mask = NULL;
1801                         fields[field_count].in_check_value = NULL;
1802                         fields[field_count].in_handler = field_le_to_host;
1803                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1804                 }
1805         }
1806
1807         jtag_add_dr_scan(num_fields, fields, -1);
1808         jtag_execute_queue();
1809
1810         for (i = 0; i < argc / 2; i++)
1811                 free(fields[i].out_value);
1812
1813         free(fields);
1814
1815         return ERROR_OK;
1816 }
1817
1818 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1819 {
1820         if (argc == 1)
1821         {
1822                 if (strcmp(args[0], "enable") == 0)
1823                 {
1824                         jtag_verify_capture_ir = 1;
1825                 }
1826                 else if (strcmp(args[0], "disable") == 0)
1827                 {
1828                         jtag_verify_capture_ir = 0;
1829                 } else
1830                 {
1831                         return ERROR_COMMAND_SYNTAX_ERROR;
1832                 }
1833         } else if (argc != 0)
1834         {
1835                 return ERROR_COMMAND_SYNTAX_ERROR;
1836         }
1837
1838         command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1839
1840         return ERROR_OK;
1841 }