git.gag.com Git - fw/openocd/blob - src/jtag/jtag.c

   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 u8 tap_move[6][6] =
  63 {
  64 /*        TLR   RTI   SD    PD    SI    PI             */
  65         {0x7f, 0x00, 0x17, 0x0a, 0x1b, 0x16},   /* TLR */
  66         {0x7f, 0x00, 0x25, 0x05, 0x2b, 0x0b},   /* RTI */
  67         {0x7f, 0x31, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
  68         {0x7f, 0x30, 0x20, 0x17, 0x1e, 0x2f},   /* PD  */
  69         {0x7f, 0x31, 0x07, 0x17, 0x00, 0x01},   /* SI  */
  70         {0x7f, 0x30, 0x1c, 0x17, 0x20, 0x2f}    /* PI  */
  71 };
  72
  73 int tap_move_map[16] = {
  74         0, -1, -1,  2, -1,  3, -1, -1,
  75         1, -1, -1,  4, -1,  5, -1, -1
  76 };
  77
  78 tap_transition_t tap_transitions[16] =
  79 {
  80         {TAP_TLR, TAP_RTI},             /* TLR */
  81         {TAP_SIS, TAP_CD},              /* SDS */
  82         {TAP_E1D, TAP_SD},              /* CD  */
  83         {TAP_E1D, TAP_SD},              /* SD  */
  84         {TAP_UD,  TAP_PD},              /* E1D */
  85         {TAP_E2D, TAP_PD},              /* PD  */
  86         {TAP_UD,  TAP_SD},              /* E2D */
  87         {TAP_SDS, TAP_RTI},             /* UD  */
  88         {TAP_SDS, TAP_RTI},             /* RTI */
  89         {TAP_TLR, TAP_CI},              /* SIS */
  90         {TAP_E1I, TAP_SI},              /* CI  */
  91         {TAP_E1I, TAP_SI},              /* SI  */
  92         {TAP_UI,  TAP_PI},              /* E1I */
  93         {TAP_E2I, TAP_PI},              /* PI  */
  94         {TAP_UI,  TAP_SI},              /* E2I */
  95         {TAP_SDS, TAP_RTI}              /* UI  */
  96 };
  97
  98 char* jtag_event_strings[] =
  99 {
 100         "SRST asserted",
 101         "TRST asserted",
 102         "SRST released",
 103         "TRST released"
 104 };
 105
 106 enum tap_state end_state = TAP_TLR;
 107 enum tap_state cur_state = TAP_TLR;
 108 int jtag_trst = 0;
 109 int jtag_srst = 0;
 110
 111 jtag_command_t *jtag_command_queue = NULL;
 112 jtag_command_t **last_comand_pointer = &jtag_command_queue;
 113 jtag_device_t *jtag_devices = NULL;
 114 int jtag_num_devices = 0;
 115 int jtag_ir_scan_size = 0;
 116 enum reset_types jtag_reset_config = RESET_NONE;
 117 enum tap_state cmd_queue_end_state = TAP_TLR;
 118 enum tap_state cmd_queue_cur_state = TAP_TLR;
 119
 120 int jtag_verify_capture_ir = 1;
 121
 122 /* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
 123 int jtag_nsrst_delay = 0; /* default to no nSRST delay */
 124 int jtag_ntrst_delay = 0; /* default to no nTRST delay */
 125
 126 /* maximum number of JTAG devices expected in the chain
 127  */
 128 #define JTAG_MAX_CHAIN_SIZE 20
 129
 130 /* callbacks to inform high-level handlers about JTAG state changes */
 131 jtag_event_callback_t *jtag_event_callbacks;
 132
 133 /* jtag interfaces (parport, FTDI-USB, TI-USB, ...)
 134  */
 135 #if BUILD_PARPORT == 1
 136         extern jtag_interface_t parport_interface;
 137 #endif
 138
 139 #if BUILD_FT2232_FTD2XX == 1
 140         extern jtag_interface_t ft2232_interface;
 141 #endif
 142
 143 #if BUILD_FT2232_LIBFTDI == 1
 144         extern jtag_interface_t ft2232_interface;
 145 #endif
 146
 147 #if BUILD_AMTJTAGACCEL == 1
 148         extern jtag_interface_t amt_jtagaccel_interface;
 149 #endif
 150
 151 #if BUILD_EP93XX == 1
 152         extern jtag_interface_t ep93xx_interface;
 153 #endif
 154
 155 #if BUILD_AT91RM9200 == 1
 156         extern jtag_interface_t at91rm9200_interface;
 157 #endif
 158
 159 #if BUILD_GW16012 == 1
 160         extern jtag_interface_t gw16012_interface;
 161 #endif
 162
 163 jtag_interface_t *jtag_interfaces[] = {
 164 #if BUILD_PARPORT == 1
 165         &parport_interface,
 166 #endif
 167 #if BUILD_FT2232_FTD2XX == 1
 168         &ft2232_interface,
 169 #endif
 170 #if BUILD_FT2232_LIBFTDI == 1
 171         &ft2232_interface,
 172 #endif
 173 #if BUILD_AMTJTAGACCEL == 1
 174         &amt_jtagaccel_interface,
 175 #endif
 176 #if BUILD_EP93XX == 1
 177         &ep93xx_interface,
 178 #endif
 179 #if BUILD_AT91RM9200 == 1
 180         &at91rm9200_interface,
 181 #endif
 182 #if BUILD_GW16012 == 1
 183         &gw16012_interface,
 184 #endif
 185         NULL,
 186 };
 187
 188 jtag_interface_t *jtag = NULL;
 189
 190 /* configuration */
 191 char* jtag_interface = NULL;
 192 int jtag_speed = -1;
 193
 194
 195 /* forward declarations */
 196 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 197 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 198 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 199 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 200 int jtag_add_statemove(enum tap_state endstate);
 201 int jtag_add_pathmove(int num_states, enum tap_state *path);
 202 int jtag_add_runtest(int num_cycles, enum tap_state endstate);
 203 int jtag_add_reset(int trst, int srst);
 204 int jtag_add_end_state(enum tap_state endstate);
 205 int jtag_add_sleep(u32 us);
 206 int jtag_execute_queue(void);
 207 int jtag_cancel_queue(void);
 208
 209 /* jtag commands */
 210 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 211 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 212 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 213 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 214 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 215 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 216
 217 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 218
 219 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 220 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 221 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 222 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 223 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 224 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 225
 226 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 227
 228 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 229 {
 230         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 231
 232         if (callback == NULL)
 233         {
 234                 return ERROR_INVALID_ARGUMENTS;
 235         }
 236
 237         if (*callbacks_p)
 238         {
 239                 while ((*callbacks_p)->next)
 240                         callbacks_p = &((*callbacks_p)->next);
 241                 callbacks_p = &((*callbacks_p)->next);
 242         }
 243
 244         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 245         (*callbacks_p)->callback = callback;
 246         (*callbacks_p)->priv = priv;
 247         (*callbacks_p)->next = NULL;
 248
 249         return ERROR_OK;
 250 }
 251
 252 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 253 {
 254         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 255
 256         if (callback == NULL)
 257         {
 258                 return ERROR_INVALID_ARGUMENTS;
 259         }
 260
 261         while (*callbacks_p)
 262         {
 263                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 264                 if ((*callbacks_p)->callback == callback)
 265                 {
 266                         free(*callbacks_p);
 267                         *callbacks_p = *next;
 268                 }
 269                 callbacks_p = next;
 270         }
 271
 272         return ERROR_OK;
 273 }
 274
 275 int jtag_call_event_callbacks(enum jtag_event event)
 276 {
 277         jtag_event_callback_t *callback = jtag_event_callbacks;
 278
 279         DEBUG("jtag event: %s", jtag_event_strings[event]);
 280
 281         while (callback)
 282         {
 283                 callback->callback(event, callback->priv);
 284                 callback = callback->next;
 285         }
 286
 287         return ERROR_OK;
 288 }
 289
 290 /* returns a pointer to the pointer of the last command in queue
 291  * this may be a pointer to the root pointer (jtag_command_queue)
 292  * or to the next member of the last but one command
 293  */
 294 jtag_command_t** jtag_get_last_command_p(void)
 295 {
 296 /*      jtag_command_t *cmd = jtag_command_queue;
 297
 298         if (cmd)
 299                 while (cmd->next)
 300                         cmd = cmd->next;
 301         else
 302                 return &jtag_command_queue;
 303
 304         return &cmd->next;*/
 305
 306         return last_comand_pointer;
 307 }
 308
 309 /* returns a pointer to the n-th device in the scan chain */
 310 jtag_device_t* jtag_get_device(int num)
 311 {
 312         jtag_device_t *device = jtag_devices;
 313         int i = 0;
 314
 315         while (device)
 316         {
 317                 if (num == i)
 318                         return device;
 319                 device = device->next;
 320                 i++;
 321         }
 322
 323         return NULL;
 324 }
 325
 326 void* cmd_queue_alloc(size_t size)
 327 {
 328         cmd_queue_page_t **p_page = &cmd_queue_pages;
 329         int offset;
 330
 331         if (*p_page)
 332         {
 333                 while ((*p_page)->next)
 334                         p_page = &((*p_page)->next);
 335                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 336                         p_page = &((*p_page)->next);
 337         }
 338
 339         if (!*p_page)
 340         {
 341                 *p_page = malloc(sizeof(cmd_queue_page_t));
 342                 (*p_page)->used = 0;
 343                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 344                 (*p_page)->next = NULL;
 345         }
 346
 347         offset = (*p_page)->used;
 348         (*p_page)->used += size;
 349
 350         return ((*p_page)->address) + offset;
 351 }
 352
 353 void cmd_queue_free()
 354 {
 355         cmd_queue_page_t *page = cmd_queue_pages;
 356
 357         while (page)
 358         {
 359                 cmd_queue_page_t *last = page;
 360                 free(page->address);
 361                 page = page->next;
 362                 free(last);
 363         }
 364
 365         cmd_queue_pages = NULL;
 366 }
 367
 368 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 369 {
 370         jtag_command_t **last_cmd;
 371         jtag_device_t *device;
 372         int i, j;
 373         int scan_size = 0;
 374
 375         if (jtag_trst == 1)
 376         {
 377                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 378                 return ERROR_JTAG_TRST_ASSERTED;
 379         }
 380
 381         last_cmd = jtag_get_last_command_p();
 382
 383         /* allocate memory for a new list member */
 384         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 385         (*last_cmd)->next = NULL;
 386         last_comand_pointer = &((*last_cmd)->next);
 387         (*last_cmd)->type = JTAG_SCAN;
 388
 389         /* allocate memory for ir scan command */
 390         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 391         (*last_cmd)->cmd.scan->ir_scan = 1;
 392         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 393         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 394         (*last_cmd)->cmd.scan->end_state = state;
 395         if (error_handler)
 396         {
 397                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 398                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 399         }
 400         else
 401         {
 402                 (*last_cmd)->cmd.scan->error_handler = NULL;
 403         }
 404
 405         if (state != -1)
 406                 cmd_queue_end_state = state;
 407
 408         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 409                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 410
 411         if (cmd_queue_end_state == TAP_TLR)
 412                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 413
 414         cmd_queue_cur_state = cmd_queue_end_state;
 415
 416         for (i=0; i < jtag_num_devices; i++)
 417         {
 418                 int found = 0;
 419                 device = jtag_get_device(i);
 420                 scan_size = device->ir_length;
 421                 (*last_cmd)->cmd.scan->fields[i].device = i;
 422                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 423                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 424                 if (jtag_verify_capture_ir)
 425                 {
 426                         (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(device->expected, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 427                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(device->expected_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 428                 }
 429                 else
 430                 {
 431                         (*last_cmd)->cmd.scan->fields[i].in_check_value = NULL;
 432                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = NULL;
 433                 }
 434                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 435                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 436
 437                 /* search the list */
 438                 for (j=0; j < num_fields; j++)
 439                 {
 440                         if (i == fields[j].device)
 441                         {
 442                                 found = 1;
 443                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 444                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 445
 446                                 device->bypass = 0;
 447                                 break;
 448                         }
 449                 }
 450
 451                 if (!found)
 452                 {
 453                         /* if a device isn't listed, set it to BYPASS */
 454                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 455                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 456                         device->bypass = 1;
 457
 458                 }
 459
 460                 /* update device information */
 461                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 462         }
 463
 464         return ERROR_OK;
 465 }
 466
 467 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 468 {
 469         jtag_command_t **last_cmd;
 470         int i;
 471
 472         if (jtag_trst == 1)
 473         {
 474                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 475                 return ERROR_JTAG_TRST_ASSERTED;
 476         }
 477
 478         last_cmd = jtag_get_last_command_p();
 479
 480         /* allocate memory for a new list member */
 481         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 482         (*last_cmd)->next = NULL;
 483         last_comand_pointer = &((*last_cmd)->next);
 484         (*last_cmd)->type = JTAG_SCAN;
 485
 486         /* allocate memory for ir scan command */
 487         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 488         (*last_cmd)->cmd.scan->ir_scan = 1;
 489         (*last_cmd)->cmd.scan->num_fields = num_fields;
 490         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 491         (*last_cmd)->cmd.scan->end_state = state;
 492         if (error_handler)
 493         {
 494                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 495                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 496         }
 497         else
 498         {
 499                 (*last_cmd)->cmd.scan->error_handler = NULL;
 500         }
 501
 502         if (state != -1)
 503                 cmd_queue_end_state = state;
 504
 505         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 506                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 507
 508         if (cmd_queue_end_state == TAP_TLR)
 509                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 510
 511         cmd_queue_cur_state = cmd_queue_end_state;
 512
 513         for (i = 0; i < num_fields; i++)
 514         {
 515                 int num_bits = fields[i].num_bits;
 516                 int num_bytes = CEIL(fields[i].num_bits, 8);
 517                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 518                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 519                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 520                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 521                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 522                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 523                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 524                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 525                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 526         }
 527         return ERROR_OK;
 528 }
 529
 530 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 531 {
 532         int i, j;
 533         int bypass_devices = 0;
 534         int field_count = 0;
 535         jtag_command_t **last_cmd = jtag_get_last_command_p();
 536         jtag_device_t *device = jtag_devices;
 537         int scan_size;
 538
 539         if (jtag_trst == 1)
 540         {
 541                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 542                 return ERROR_JTAG_TRST_ASSERTED;
 543         }
 544
 545         /* count devices in bypass */
 546         while (device)
 547         {
 548                 if (device->bypass)
 549                         bypass_devices++;
 550                 device = device->next;
 551         }
 552
 553         /* allocate memory for a new list member */
 554         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 555         last_comand_pointer = &((*last_cmd)->next);
 556         (*last_cmd)->next = NULL;
 557         (*last_cmd)->type = JTAG_SCAN;
 558
 559         /* allocate memory for dr scan command */
 560         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 561         (*last_cmd)->cmd.scan->ir_scan = 0;
 562         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 563         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 564         (*last_cmd)->cmd.scan->end_state = state;
 565         if (error_handler)
 566         {
 567                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 568                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 569         }
 570         else
 571         {
 572                 (*last_cmd)->cmd.scan->error_handler = NULL;
 573         }
 574
 575         if (state != -1)
 576                 cmd_queue_end_state = state;
 577
 578         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 579                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 580
 581         if (cmd_queue_end_state == TAP_TLR)
 582                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 583
 584         cmd_queue_cur_state = cmd_queue_end_state;
 585
 586         for (i=0; i < jtag_num_devices; i++)
 587         {
 588                 int found = 0;
 589                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 590
 591                 for (j=0; j < num_fields; j++)
 592                 {
 593                         if (i == fields[j].device)
 594                         {
 595                                 found = 1;
 596                                 scan_size = fields[j].num_bits;
 597                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 598                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 599                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 600                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 601                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_value = buf_cpy(fields[j].in_check_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 602                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = buf_cpy(fields[j].in_check_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 603                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 604                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 605                         }
 606                 }
 607                 if (!found)
 608                 {
 609                         /* if a device isn't listed, the BYPASS register should be selected */
 610                         if (!jtag_get_device(i)->bypass)
 611                         {
 612                                 ERROR("BUG: no scan data for a device not in BYPASS");
 613                                 exit(-1);
 614                         }
 615
 616                         /* program the scan field to 1 bit length, and ignore it's value */
 617                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 618                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 619                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 620                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 621                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 622                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 623                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 624                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 625                 }
 626                 else
 627                 {
 628                         /* if a device is listed, the BYPASS register must not be selected */
 629                         if (jtag_get_device(i)->bypass)
 630                         {
 631                                 WARNING("scan data for a device in BYPASS");
 632                         }
 633                 }
 634         }
 635         return ERROR_OK;
 636 }
 637
 638 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 639 {
 640         int i;
 641         jtag_command_t **last_cmd = jtag_get_last_command_p();
 642
 643         if (jtag_trst == 1)
 644         {
 645                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 646                 return ERROR_JTAG_TRST_ASSERTED;
 647         }
 648
 649         /* allocate memory for a new list member */
 650         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 651         last_comand_pointer = &((*last_cmd)->next);
 652         (*last_cmd)->next = NULL;
 653         (*last_cmd)->type = JTAG_SCAN;
 654
 655         /* allocate memory for scan command */
 656         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 657         (*last_cmd)->cmd.scan->ir_scan = 0;
 658         (*last_cmd)->cmd.scan->num_fields = num_fields;
 659         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 660         (*last_cmd)->cmd.scan->end_state = state;
 661         if (error_handler)
 662         {
 663                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 664                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 665         }
 666         else
 667         {
 668                 (*last_cmd)->cmd.scan->error_handler = NULL;
 669         }
 670
 671         if (state != -1)
 672                 cmd_queue_end_state = state;
 673
 674         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 675                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 676
 677         if (cmd_queue_end_state == TAP_TLR)
 678                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 679
 680         cmd_queue_cur_state = cmd_queue_end_state;
 681
 682         for (i = 0; i < num_fields; i++)
 683         {
 684                 int num_bits = fields[i].num_bits;
 685                 int num_bytes = CEIL(fields[i].num_bits, 8);
 686                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 687                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 688                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 689                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 690                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 691                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 692                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 693                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 694                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 695         }
 696
 697         return ERROR_OK;
 698 }
 699 int jtag_add_statemove(enum tap_state state)
 700 {
 701         jtag_command_t **last_cmd = jtag_get_last_command_p();
 702
 703         if (jtag_trst == 1)
 704         {
 705                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 706                 return ERROR_JTAG_TRST_ASSERTED;
 707         }
 708
 709         /* allocate memory for a new list member */
 710         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 711         last_comand_pointer = &((*last_cmd)->next);
 712         (*last_cmd)->next = NULL;
 713         (*last_cmd)->type = JTAG_STATEMOVE;
 714
 715         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 716         (*last_cmd)->cmd.statemove->end_state = state;
 717
 718         if (state != -1)
 719                 cmd_queue_end_state = state;
 720
 721         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 722                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 723
 724         if (cmd_queue_end_state == TAP_TLR)
 725                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 726
 727         cmd_queue_cur_state = cmd_queue_end_state;
 728
 729         return ERROR_OK;
 730 }
 731
 732 int jtag_add_pathmove(int num_states, enum tap_state *path)
 733 {
 734         jtag_command_t **last_cmd = jtag_get_last_command_p();
 735         int i;
 736
 737         if (jtag_trst == 1)
 738         {
 739                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 740                 return ERROR_JTAG_TRST_ASSERTED;
 741         }
 742
 743         /* the last state has to be a stable state */
 744         if (tap_move_map[path[num_states - 1]] == -1)
 745         {
 746                 ERROR("TAP path doesn't finish in a stable state");
 747                 return ERROR_JTAG_NOT_IMPLEMENTED;
 748         }
 749
 750         if (jtag->support_pathmove)
 751         {
 752                 /* allocate memory for a new list member */
 753                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 754                 last_comand_pointer = &((*last_cmd)->next);
 755                 (*last_cmd)->next = NULL;
 756                 (*last_cmd)->type = JTAG_PATHMOVE;
 757
 758                 (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 759                 (*last_cmd)->cmd.pathmove->num_states = num_states;
 760                 (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 761
 762                 for (i = 0; i < num_states; i++)
 763                         (*last_cmd)->cmd.pathmove->path[i] = path[i];
 764         }
 765         else
 766         {
 767                 /* validate the desired path, and see if it fits a default path */
 768                 int begin = 0;
 769                 int end = 0;
 770                 int j;
 771
 772                 for (i = 0; i < num_states; i++)
 773                 {
 774                         for (j = i; j < num_states; j++)
 775                         {
 776                                 if (tap_move_map[path[j]] != -1)
 777                                 {
 778                                         end = j;
 779                                         break;
 780                                 }
 781                         }
 782
 783                         if (begin - end <= 7)   /* a default path spans no more than 7 states */
 784                         {
 785                                 jtag_add_statemove(path[end]);
 786                         }
 787                         else
 788                         {
 789                                 ERROR("encountered a TAP path that can't be fulfilled by default paths");
 790                                 return ERROR_JTAG_NOT_IMPLEMENTED;
 791                         }
 792
 793                         i = end;
 794                 }
 795         }
 796
 797         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 798                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 799
 800         if (cmd_queue_end_state == TAP_TLR)
 801                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 802
 803         cmd_queue_cur_state = path[num_states - 1];
 804
 805         return ERROR_OK;
 806 }
 807
 808 int jtag_add_runtest(int num_cycles, enum tap_state state)
 809 {
 810         jtag_command_t **last_cmd = jtag_get_last_command_p();
 811
 812         if (jtag_trst == 1)
 813         {
 814                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 815                 return ERROR_JTAG_TRST_ASSERTED;
 816         }
 817
 818         /* allocate memory for a new list member */
 819         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 820         (*last_cmd)->next = NULL;
 821         last_comand_pointer = &((*last_cmd)->next);
 822         (*last_cmd)->type = JTAG_RUNTEST;
 823
 824         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 825         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 826         (*last_cmd)->cmd.runtest->end_state = state;
 827
 828         if (state != -1)
 829                 cmd_queue_end_state = state;
 830
 831         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 832                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 833
 834         if (cmd_queue_end_state == TAP_TLR)
 835                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 836
 837         cmd_queue_cur_state = cmd_queue_end_state;
 838
 839         return ERROR_OK;
 840 }
 841
 842 int jtag_add_reset(int req_trst, int req_srst)
 843 {
 844         int trst_with_tms = 0;
 845
 846         jtag_command_t **last_cmd = jtag_get_last_command_p();
 847
 848         if (req_trst == -1)
 849                 req_trst = jtag_trst;
 850
 851         if (req_srst == -1)
 852                 req_srst = jtag_srst;
 853
 854         /* Make sure that jtag_reset_config allows the requested reset */
 855         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 856         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 857                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 858
 859         /* if TRST pulls SRST, we reset with TAP T-L-R */
 860         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 861         {
 862                 req_trst = 0;
 863                 trst_with_tms = 1;
 864         }
 865
 866         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 867         {
 868                 ERROR("requested nSRST assertion, but the current configuration doesn't support this");
 869                 return ERROR_JTAG_RESET_CANT_SRST;
 870         }
 871
 872         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 873         {
 874                 req_trst = 0;
 875                 trst_with_tms = 1;
 876         }
 877
 878         /* allocate memory for a new list member */
 879         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 880         (*last_cmd)->next = NULL;
 881         last_comand_pointer = &((*last_cmd)->next);
 882         (*last_cmd)->type = JTAG_RESET;
 883
 884         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 885         (*last_cmd)->cmd.reset->trst = req_trst;
 886         (*last_cmd)->cmd.reset->srst = req_srst;
 887
 888         jtag_trst = req_trst;
 889         jtag_srst = req_srst;
 890
 891         if (jtag_srst)
 892         {
 893                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 894         }
 895         else
 896         {
 897                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 898                 if (jtag_nsrst_delay)
 899                         jtag_add_sleep(jtag_nsrst_delay * 1000);
 900         }
 901
 902         if (trst_with_tms)
 903         {
 904                 last_cmd = &((*last_cmd)->next);
 905
 906                 /* allocate memory for a new list member */
 907                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 908                 (*last_cmd)->next = NULL;
 909                 last_comand_pointer = &((*last_cmd)->next);
 910                 (*last_cmd)->type = JTAG_STATEMOVE;
 911
 912                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 913                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 914
 915                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 916                 cmd_queue_cur_state = TAP_TLR;
 917                 cmd_queue_end_state = TAP_TLR;
 918
 919                 return ERROR_OK;
 920         }
 921         else
 922         {
 923                 if (jtag_trst)
 924                 {
 925                         /* we just asserted nTRST, so we're now in Test-Logic-Reset,
 926                          * and inform possible listeners about this
 927                          */
 928                         cmd_queue_cur_state = TAP_TLR;
 929                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 930                 }
 931                 else
 932                 {
 933                         /* the nTRST line got deasserted, so we're still in Test-Logic-Reset,
 934                          * but we might want to add a delay to give the TAP time to settle
 935                          */
 936                         if (jtag_ntrst_delay)
 937                                 jtag_add_sleep(jtag_ntrst_delay * 1000);
 938                 }
 939         }
 940
 941         return ERROR_OK;
 942 }
 943
 944 int jtag_add_end_state(enum tap_state state)
 945 {
 946         jtag_command_t **last_cmd = jtag_get_last_command_p();
 947
 948         /* allocate memory for a new list member */
 949         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 950         (*last_cmd)->next = NULL;
 951         last_comand_pointer = &((*last_cmd)->next);
 952         (*last_cmd)->type = JTAG_END_STATE;
 953
 954         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 955         (*last_cmd)->cmd.end_state->end_state = state;
 956
 957         if (state != -1)
 958                 cmd_queue_end_state = state;
 959
 960         return ERROR_OK;
 961 }
 962
 963 int jtag_add_sleep(u32 us)
 964 {
 965         jtag_command_t **last_cmd = jtag_get_last_command_p();
 966
 967         /* allocate memory for a new list member */
 968         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 969         (*last_cmd)->next = NULL;
 970         last_comand_pointer = &((*last_cmd)->next);
 971         (*last_cmd)->type = JTAG_SLEEP;
 972
 973         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 974         (*last_cmd)->cmd.sleep->us = us;
 975
 976         return ERROR_OK;
 977 }
 978
 979 int jtag_scan_size(scan_command_t *cmd)
 980 {
 981         int bit_count = 0;
 982         int i;
 983
 984         /* count bits in scan command */
 985         for (i=0; i<cmd->num_fields; i++)
 986         {
 987                 bit_count += cmd->fields[i].num_bits;
 988         }
 989
 990         return bit_count;
 991 }
 992
 993 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 994 {
 995         int bit_count = 0;
 996         int i;
 997
 998         bit_count = jtag_scan_size(cmd);
 999         *buffer = malloc(CEIL(bit_count, 8));
1000
1001         bit_count = 0;
1002
1003         for (i = 0; i < cmd->num_fields; i++)
1004         {
1005                 if (cmd->fields[i].out_value)
1006                 {
1007 #ifdef _DEBUG_JTAG_IO_
1008                         char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > 64) ? 64 : cmd->fields[i].num_bits, 16);
1009 #endif
1010                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
1011 #ifdef _DEBUG_JTAG_IO_
1012                         DEBUG("fields[%i].out_value: 0x%s", i, char_buf);
1013                         free(char_buf);
1014 #endif
1015                 }
1016
1017                 bit_count += cmd->fields[i].num_bits;
1018         }
1019
1020         return bit_count;
1021
1022 }
1023
1024 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
1025 {
1026         int i;
1027         int bit_count = 0;
1028         int retval;
1029
1030         /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
1031         retval = ERROR_OK;
1032
1033         for (i=0; i < cmd->num_fields; i++)
1034         {
1035                 /* if neither in_value, in_check_value nor in_handler
1036                  * are specified we don't have to examine this field
1037                  */
1038                 if (cmd->fields[i].in_value || cmd->fields[i].in_check_value || cmd->fields[i].in_handler)
1039                 {
1040                         int num_bits = cmd->fields[i].num_bits;
1041                         u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
1042
1043                         #ifdef _DEBUG_JTAG_IO_
1044                                 char *char_buf;
1045
1046                                 char_buf = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1047                                 DEBUG("fields[%i].in_value: 0x%s", i, char_buf);
1048                                 free(char_buf);
1049                         #endif
1050
1051                         if (cmd->fields[i].in_value)
1052                         {
1053                                 buf_cpy(captured, cmd->fields[i].in_value, num_bits);
1054
1055                                 if (cmd->fields[i].in_handler)
1056                                 {
1057                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv) != ERROR_OK)
1058                                         {
1059                                                 WARNING("in_handler reported a failed check");
1060                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1061                                         }
1062                                 }
1063                         }
1064
1065                         /* no in_value specified, but a handler takes care of the scanned data */
1066                         if (cmd->fields[i].in_handler && (!cmd->fields[i].in_value))
1067                         {
1068                                 if (cmd->fields[i].in_handler(captured, cmd->fields[i].in_handler_priv) != ERROR_OK)
1069                                 {
1070                                         /* We're going to call the error:handler later, but if the in_handler
1071                                          * reported an error we report this failure upstream
1072                                          */
1073                                         WARNING("in_handler reported a failed check");
1074                                         retval = ERROR_JTAG_QUEUE_FAILED;
1075                                 }
1076                         }
1077
1078                         if (cmd->fields[i].in_check_value)
1079                         {
1080                                 int compare_failed = 0;
1081
1082                                 if (cmd->fields[i].in_check_mask)
1083                                         compare_failed = buf_cmp_mask(captured, cmd->fields[i].in_check_value, cmd->fields[i].in_check_mask, num_bits);
1084                                 else
1085                                         compare_failed = buf_cmp(captured, cmd->fields[i].in_check_value, num_bits);
1086
1087                                 if (compare_failed)
1088                                 {
1089                                         char *captured_char = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1090                                         char *in_check_value_char = buf_to_str(cmd->fields[i].in_check_value, (num_bits > 64) ? 64 : num_bits, 16);
1091
1092                                         if (cmd->error_handler)
1093                                         {
1094                                                 /* ask the error handler if once has been specified if this is a real problem */
1095                                                 if (cmd->error_handler->error_handler(captured, cmd->error_handler->error_handler_priv) != ERROR_OK)
1096                                                         retval = ERROR_JTAG_QUEUE_FAILED;
1097                                                 else
1098                                                         compare_failed = 0;
1099                                         }
1100                                         else
1101                                         {
1102                                                 /* if there wasn't a handler specified, we report a failure */
1103                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1104                                         }
1105
1106                                         /* An error handler could have caught the failing check
1107                                          * only report a problem when there wasn't a handler, or if the handler
1108                                          * acknowledged the error
1109                                          */
1110                                         if (compare_failed)
1111                                         {
1112                                                 if (cmd->fields[i].in_check_mask)
1113                                                 {
1114                                                         char *in_check_mask_char;
1115                                                         in_check_mask_char = buf_to_str(cmd->fields[i].in_check_mask, (num_bits > 64) ? 64 : num_bits, 16);
1116                                                         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);
1117                                                         free(in_check_mask_char);
1118                                                 }
1119                                                 else
1120                                                 {
1121                                                         WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
1122                                                 }
1123                                         }
1124
1125                                         free(captured_char);
1126                                         free(in_check_value_char);
1127                                 }
1128                         }
1129                         free(captured);
1130                 }
1131                 bit_count += cmd->fields[i].num_bits;
1132         }
1133
1134         return retval;
1135 }
1136
1137 enum scan_type jtag_scan_type(scan_command_t *cmd)
1138 {
1139         int i;
1140         int type = 0;
1141
1142         for (i=0; i < cmd->num_fields; i++)
1143         {
1144                 if (cmd->fields[i].in_check_value || cmd->fields[i].in_value || cmd->fields[i].in_handler)
1145                         type |= SCAN_IN;
1146                 if (cmd->fields[i].out_value)
1147                         type |= SCAN_OUT;
1148         }
1149
1150         return type;
1151 }
1152
1153 int jtag_execute_queue(void)
1154 {
1155         int retval;
1156
1157         retval = jtag->execute_queue();
1158
1159         cmd_queue_free();
1160
1161         jtag_command_queue = NULL;
1162         last_comand_pointer = &jtag_command_queue;
1163
1164         return retval;
1165 }
1166
1167 int jtag_cancel_queue(void)
1168 {
1169         cmd_queue_free();
1170         jtag_command_queue = NULL;
1171         last_comand_pointer = &jtag_command_queue;
1172
1173         return ERROR_OK;
1174 }
1175
1176 int jtag_reset_callback(enum jtag_event event, void *priv)
1177 {
1178         jtag_device_t *device = priv;
1179
1180         DEBUG("-");
1181
1182         if (event == JTAG_TRST_ASSERTED)
1183         {
1184                 buf_set_ones(device->cur_instr, device->ir_length);
1185                 device->bypass = 1;
1186         }
1187
1188         return ERROR_OK;
1189 }
1190
1191 void jtag_sleep(u32 us)
1192 {
1193         usleep(us);
1194 }
1195
1196 /* Try to examine chain layout according to IEEE 1149.1 §12
1197  */
1198 int jtag_examine_chain()
1199 {
1200         jtag_device_t *device = jtag_devices;
1201         scan_field_t field;
1202         u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
1203         int i;
1204         int bit_count;
1205         int device_count = 0;
1206         u8 zero_check = 0x0;
1207         u8 one_check = 0xff;
1208
1209         field.device = 0;
1210         field.num_bits = sizeof(idcode_buffer) * 8;
1211         field.out_value = idcode_buffer;
1212         field.out_mask = NULL;
1213         field.in_value = idcode_buffer;
1214         field.in_check_value = NULL;
1215         field.in_check_mask = NULL;
1216         field.in_handler = NULL;
1217         field.in_handler_priv = NULL;
1218
1219         for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
1220         {
1221                 buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
1222         }
1223
1224         jtag_add_plain_dr_scan(1, &field, TAP_TLR, NULL);
1225         jtag_execute_queue();
1226
1227         for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++)
1228         {
1229                 zero_check |= idcode_buffer[i];
1230                 one_check &= idcode_buffer[i];
1231         }
1232
1233         /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */
1234         if ((zero_check == 0x00) || (one_check == 0xff))
1235         {
1236                 ERROR("JTAG communication failure, check connection, JTAG interface, target power etc.");
1237                 exit(-1);
1238         }
1239
1240         for (bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
1241         {
1242                 u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
1243                 if ((idcode & 1) == 0)
1244                 {
1245                         /* LSB must not be 0, this indicates a device in bypass */
1246                         device_count++;
1247
1248                         bit_count += 1;
1249                 }
1250                 else
1251                 {
1252                         u32 manufacturer;
1253                         u32 part;
1254                         u32 version;
1255
1256                         if (idcode == 0x000000FF)
1257                         {
1258                                 /* End of chain (invalid manufacturer ID) */
1259                                 break;
1260                         }
1261
1262                         if (device)
1263                         {
1264                                 device->idcode = idcode;
1265                                 device = device->next;
1266                         }
1267                         device_count++;
1268
1269                         manufacturer = (idcode & 0xffe) >> 1;
1270                         part = (idcode & 0xffff000) >> 12;
1271                         version = (idcode & 0xf0000000) >> 28;
1272
1273                         DEBUG("JTAG device found: 0x%8.8x (Manufacturer: 0x%3.3x, Part: 0x%4.4x, Version: 0x%1.1x",
1274                                 idcode, manufacturer, part, version);
1275
1276                         bit_count += 32;
1277                 }
1278         }
1279
1280         /* see if number of discovered devices matches configuration */
1281         if (device_count != jtag_num_devices)
1282         {
1283                 ERROR("number of discovered devices in JTAG chain (%i) doesn't match configuration (%i)",
1284                         device_count, jtag_num_devices);
1285                 exit(-1);
1286         }
1287
1288         return ERROR_OK;
1289 }
1290
1291 int jtag_validate_chain()
1292 {
1293         jtag_device_t *device = jtag_devices;
1294         int total_ir_length = 0;
1295         u8 *ir_test = NULL;
1296         scan_field_t field;
1297         int chain_pos = 0;
1298
1299         while (device)
1300         {
1301                 total_ir_length += device->ir_length;
1302                 device = device->next;
1303         }
1304
1305         total_ir_length += 2;
1306         ir_test = malloc(CEIL(total_ir_length, 8));
1307         buf_set_ones(ir_test, total_ir_length);
1308
1309         field.device = 0;
1310         field.num_bits = total_ir_length;
1311         field.out_value = ir_test;
1312         field.out_mask = NULL;
1313         field.in_value = ir_test;
1314         field.in_check_value = NULL;
1315         field.in_check_mask = NULL;
1316         field.in_handler = NULL;
1317         field.in_handler_priv = NULL;
1318
1319         jtag_add_plain_ir_scan(1, &field, TAP_TLR, NULL);
1320         jtag_execute_queue();
1321
1322         device = jtag_devices;
1323         while (device)
1324         {
1325                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1326                 {
1327                         char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1328                         ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1329                         free(cbuf);
1330                         exit(-1);
1331                 }
1332                 chain_pos += device->ir_length;
1333                 device = device->next;
1334         }
1335
1336         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1337         {
1338                 char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1339                 ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1340                 free(cbuf);
1341                 exit(-1);
1342         }
1343
1344         free(ir_test);
1345
1346         return ERROR_OK;
1347 }
1348
1349 int jtag_register_commands(struct command_context_s *cmd_ctx)
1350 {
1351         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1352                 COMMAND_CONFIG, NULL);
1353         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1354                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1355         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1356                 COMMAND_CONFIG, NULL);
1357         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1358                 COMMAND_CONFIG, NULL);
1359         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
1360                 COMMAND_CONFIG, NULL);
1361         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
1362                 COMMAND_CONFIG, NULL);
1363
1364         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1365                 COMMAND_EXEC, "print current scan chain configuration");
1366
1367         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1368                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1369         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1370                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1371         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1372                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1373         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1374                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1375         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1376                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1377         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1378                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1379
1380         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1381                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1382         return ERROR_OK;
1383 }
1384
1385 int jtag_init(struct command_context_s *cmd_ctx)
1386 {
1387         int i;
1388
1389         DEBUG("-");
1390
1391         if (jtag_speed == -1)
1392                 jtag_speed = 0;
1393
1394         if (jtag_interface && (jtag_interface[0] != 0))
1395                 /* configuration var 'jtag_interface' is set, and not empty */
1396                 for (i = 0; jtag_interfaces[i]; i++)
1397                 {
1398                         if (strcmp(jtag_interface, jtag_interfaces[i]->name) == 0)
1399                         {
1400                                 jtag_device_t *device;
1401                                 device = jtag_devices;
1402
1403                                 if (jtag_interfaces[i]->init() != ERROR_OK)
1404                                         return ERROR_JTAG_INIT_FAILED;
1405                                 jtag = jtag_interfaces[i];
1406
1407                                 jtag_ir_scan_size = 0;
1408                                 jtag_num_devices = 0;
1409                                 while (device != NULL)
1410                                 {
1411                                         jtag_ir_scan_size += device->ir_length;
1412                                         jtag_num_devices++;
1413                                         device = device->next;
1414                                 }
1415
1416                                 jtag_add_statemove(TAP_TLR);
1417                                 jtag_execute_queue();
1418
1419                                 jtag_examine_chain();
1420
1421                                 jtag_validate_chain();
1422
1423                                 return ERROR_OK;
1424                         }
1425                 }
1426
1427         /* no valid interface was found (i.e. the configuration option,
1428          * didn't match one of the compiled-in interfaces
1429          */
1430         ERROR("No valid jtag interface found (%s)", jtag_interface);
1431         ERROR("compiled-in jtag interfaces:");
1432         for (i = 0; jtag_interfaces[i]; i++)
1433         {
1434                 ERROR("%i: %s", i, jtag_interfaces[i]->name);
1435         }
1436
1437         jtag = NULL;
1438         return ERROR_JTAG_INVALID_INTERFACE;
1439 }
1440
1441 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1442 {
1443         int i;
1444
1445         /* only if the configuration var isn't overwritten from cmdline */
1446         if (!jtag_interface)
1447         {
1448                 if (args[0] && (args[0][0] != 0))
1449                 {
1450                         for (i=0; jtag_interfaces[i]; i++)
1451                         {
1452                                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1453                                 {
1454                                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1455                                                 exit(-1);
1456
1457                                         jtag_interface = jtag_interfaces[i]->name;
1458
1459                                         return ERROR_OK;
1460                                 }
1461                         }
1462                 }
1463
1464                 /* remember the requested interface name, so we can complain about it later */
1465                 jtag_interface = strdup(args[0]);
1466                 DEBUG("'interface' command didn't specify a valid interface");
1467         }
1468
1469         return ERROR_OK;
1470 }
1471
1472 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1473 {
1474         jtag_device_t **last_device_p = &jtag_devices;
1475
1476         if (*last_device_p)
1477         {
1478                 while ((*last_device_p)->next)
1479                         last_device_p = &((*last_device_p)->next);
1480                 last_device_p = &((*last_device_p)->next);
1481         }
1482
1483         if (argc < 3)
1484                 return ERROR_OK;
1485
1486         *last_device_p = malloc(sizeof(jtag_device_t));
1487         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1488
1489         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1490         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1491         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1492         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1493
1494         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1495         (*last_device_p)->bypass = 1;
1496         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1497
1498         (*last_device_p)->next = NULL;
1499
1500         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1501
1502         jtag_num_devices++;
1503
1504         return ERROR_OK;
1505 }
1506
1507 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1508 {
1509         jtag_device_t *device = jtag_devices;
1510         int device_count = 0;
1511
1512         while (device)
1513         {
1514                 u32 expected, expected_mask, cur_instr;
1515                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1516                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1517                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1518                 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);
1519                 device = device->next;
1520                 device_count++;
1521         }
1522
1523         return ERROR_OK;
1524 }
1525
1526 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1527 {
1528         if (argc >= 1)
1529         {
1530                 if (strcmp(args[0], "none") == 0)
1531                         jtag_reset_config = RESET_NONE;
1532                 else if (strcmp(args[0], "trst_only") == 0)
1533                         jtag_reset_config = RESET_HAS_TRST;
1534                 else if (strcmp(args[0], "srst_only") == 0)
1535                         jtag_reset_config = RESET_HAS_SRST;
1536                 else if (strcmp(args[0], "trst_and_srst") == 0)
1537                         jtag_reset_config = RESET_TRST_AND_SRST;
1538                 else
1539                 {
1540                         ERROR("invalid reset_config argument");
1541                         exit(-1);
1542                 }
1543         }
1544
1545         if (argc >= 2)
1546         {
1547                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1548                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1549                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1550                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1551                 else if (strcmp(args[1], "combined") == 0)
1552                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1553                 else if (strcmp(args[1], "separate") == 0)
1554                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1555                 else
1556                 {
1557                         ERROR("invalid reset_config argument");
1558                         exit(-1);
1559                 }
1560         }
1561
1562         if (argc >= 3)
1563         {
1564                 if (strcmp(args[2], "trst_open_drain") == 0)
1565                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1566                 else if (strcmp(args[2], "trst_push_pull") == 0)
1567                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1568                 else
1569                 {
1570                         ERROR("invalid reset_config argument");
1571                         exit(-1);
1572                 }
1573         }
1574
1575         if (argc >= 4)
1576         {
1577                 if (strcmp(args[3], "srst_push_pull") == 0)
1578                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1579                 else if (strcmp(args[3], "srst_open_drain") == 0)
1580                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1581                 else
1582                 {
1583                         ERROR("invalid reset_config argument");
1584                         exit(-1);
1585                 }
1586         }
1587
1588         return ERROR_OK;
1589 }
1590
1591 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1592 {
1593         if (argc < 1)
1594         {
1595                 ERROR("jtag_nsrst_delay <ms> command takes one required argument");
1596                 exit(-1);
1597         }
1598         else
1599         {
1600                 jtag_nsrst_delay = strtoul(args[0], NULL, 0);
1601         }
1602
1603         return ERROR_OK;
1604 }
1605
1606 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1607 {
1608         if (argc < 1)
1609         {
1610                 ERROR("jtag_ntrst_delay <ms> command takes one required argument");
1611                 exit(-1);
1612         }
1613         else
1614         {
1615                 jtag_ntrst_delay = strtoul(args[0], NULL, 0);
1616         }
1617
1618         return ERROR_OK;
1619 }
1620
1621 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1622 {
1623         if (argc == 0)
1624                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1625
1626         if (argc > 0)
1627         {
1628                 /* this command can be called during CONFIG,
1629                  * in which case jtag isn't initialized */
1630                 if (jtag)
1631                         jtag->speed(strtoul(args[0], NULL, 0));
1632                 else
1633                         jtag_speed = strtoul(args[0], NULL, 0);
1634         }
1635
1636         return ERROR_OK;
1637 }
1638
1639 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1640 {
1641         enum tap_state state;
1642
1643         if (argc < 1)
1644         {
1645                 command_print(cmd_ctx, "usage: endstate <tap_state>");
1646         }
1647         else
1648         {
1649                 for (state = 0; state < 16; state++)
1650                 {
1651                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1652                         {
1653                                 jtag_add_end_state(state);
1654                                 jtag_execute_queue();
1655                         }
1656                 }
1657         }
1658         command_print(cmd_ctx, "current endstate: %s", tap_state_strings[end_state]);
1659
1660         return ERROR_OK;
1661 }
1662
1663 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1664 {
1665         int trst = -1;
1666         int srst = -1;
1667         char *usage = "usage: jtag_reset <trst> <srst>";
1668         int retval;
1669
1670         if (argc < 1)
1671         {
1672                 command_print(cmd_ctx, usage);
1673                 return ERROR_OK;
1674         }
1675
1676         if (args[0][0] == '1')
1677                 trst = 1;
1678         else if (args[0][0] == '0')
1679                 trst = 0;
1680         else
1681         {
1682                 command_print(cmd_ctx, usage);
1683                 return ERROR_OK;
1684         }
1685
1686         if (args[1][0] == '1')
1687                 srst = 1;
1688         else if (args[1][0] == '0')
1689                 srst = 0;
1690         else
1691         {
1692                 command_print(cmd_ctx, usage);
1693                 return ERROR_OK;
1694         }
1695
1696         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1697         {
1698                 switch (retval)
1699                 {
1700                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1701                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1702                                 break;
1703                         case ERROR_JTAG_RESET_CANT_SRST:
1704                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1705                                 break;
1706                         default:
1707                                 command_print(cmd_ctx, "unknown error");
1708                 }
1709         }
1710         jtag_execute_queue();
1711
1712         return ERROR_OK;
1713 }
1714
1715 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1716 {
1717         if (argc < 1)
1718         {
1719                 command_print(cmd_ctx, "usage: runtest <num_cycles>");
1720                 return ERROR_OK;
1721         }
1722
1723         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1724         jtag_execute_queue();
1725
1726         return ERROR_OK;
1727
1728 }
1729
1730 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1731 {
1732         enum tap_state state;
1733
1734         state = -1;
1735         if (argc == 1)
1736         {
1737                 for (state = 0; state < 16; state++)
1738                 {
1739                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1740                         {
1741                                 break;
1742                         }
1743                 }
1744         }
1745
1746         jtag_add_statemove(state);
1747         jtag_execute_queue();
1748
1749         return ERROR_OK;
1750
1751 }
1752
1753 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1754 {
1755         int i;
1756         scan_field_t *fields;
1757
1758         if ((argc < 2) || (argc % 2))
1759         {
1760                 command_print(cmd_ctx, "usage: irscan <device> <instr> [dev2] [instr2] ...");
1761                 return ERROR_OK;
1762         }
1763
1764         fields = malloc(sizeof(scan_field_t) * argc / 2);
1765
1766         for (i = 0; i < argc / 2; i++)
1767         {
1768                 int device = strtoul(args[i*2], NULL, 0);
1769                 int field_size = jtag_get_device(device)->ir_length;
1770                 fields[i].device = device;
1771                 fields[i].out_value = malloc(CEIL(field_size, 8));
1772                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1773                 fields[i].out_mask = NULL;
1774                 fields[i].in_value = NULL;
1775                 fields[i].in_check_mask = NULL;
1776                 fields[i].in_handler = NULL;
1777                 fields[i].in_handler_priv = NULL;
1778         }
1779
1780         jtag_add_ir_scan(argc / 2, fields, -1, NULL);
1781         jtag_execute_queue();
1782
1783         for (i = 0; i < argc / 2; i++)
1784                 free(fields[i].out_value);
1785
1786         free (fields);
1787
1788         return ERROR_OK;
1789 }
1790
1791 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1792 {
1793         scan_field_t *fields;
1794         int num_fields = 0;
1795         int field_count = 0;
1796         var_t *var;
1797         int i, j;
1798
1799         if ((argc < 2) || (argc % 2))
1800         {
1801                 command_print(cmd_ctx, "usage: drscan <device> <var> [dev2] [var2]");
1802                 return ERROR_OK;
1803         }
1804
1805         for (i = 0; i < argc; i+=2)
1806         {
1807                 var = get_var_by_namenum(args[i+1]);
1808                 if (var)
1809                 {
1810                         num_fields += var->num_fields;
1811                 }
1812                 else
1813                 {
1814                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1815                         return ERROR_OK;
1816                 }
1817         }
1818
1819         fields = malloc(sizeof(scan_field_t) * num_fields);
1820
1821         for (i = 0; i < argc; i+=2)
1822         {
1823                 var = get_var_by_namenum(args[i+1]);
1824
1825                 for (j = 0; j < var->num_fields; j++)
1826                 {
1827                         fields[field_count].device = strtol(args[i], NULL, 0);
1828                         fields[field_count].num_bits = var->fields[j].num_bits;
1829                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1830                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1831                         fields[field_count].out_mask = NULL;
1832                         fields[field_count].in_value = fields[field_count].out_value;
1833                         fields[field_count].in_check_mask = NULL;
1834                         fields[field_count].in_check_value = NULL;
1835                         fields[field_count].in_handler = field_le_to_host;
1836                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1837                 }
1838         }
1839
1840         jtag_add_dr_scan(num_fields, fields, -1, NULL);
1841         jtag_execute_queue();
1842
1843         for (i = 0; i < argc / 2; i++)
1844                 free(fields[i].out_value);
1845
1846         free(fields);
1847
1848         return ERROR_OK;
1849 }
1850
1851 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1852 {
1853         if (argc == 0)
1854         {
1855                 command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1856                 return ERROR_OK;
1857         }
1858
1859         if (strcmp(args[0], "enable") == 0)
1860         {
1861                 jtag_verify_capture_ir = 1;
1862         }
1863         else if (strcmp(args[0], "disable") == 0)
1864         {
1865                 jtag_verify_capture_ir = 0;
1866         }
1867
1868         return ERROR_OK;
1869 }