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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include "jtag.h"
  27
  28 #include "command.h"
  29 #include "log.h"
  30 #include "interpreter.h"
  31
  32 #include "stdlib.h"
  33 #include "string.h"
  34 #include <unistd.h>
  35
  36 char* tap_state_strings[16] =
  37 {
  38         "tlr",
  39         "sds", "cd", "sd", "e1d", "pd", "e2d", "ud",
  40         "rti",
  41         "sis", "ci", "si", "e1i", "pi", "e2i", "ui"
  42 };
  43
  44 typedef struct cmd_queue_page_s
  45 {
  46         void *address;
  47         size_t used;
  48         struct cmd_queue_page_s *next;
  49 } cmd_queue_page_t;
  50
  51 #define CMD_QUEUE_PAGE_SIZE (1024 * 1024)
  52 static cmd_queue_page_t *cmd_queue_pages = NULL;
  53
  54 /* tap_move[i][j]: tap movement command to go from state i to state j
  55  * 0: Test-Logic-Reset
  56  * 1: Run-Test/Idle
  57  * 2: Shift-DR
  58  * 3: Pause-DR
  59  * 4: Shift-IR
  60  * 5: Pause-IR
  61  *
  62  * SD->SD and SI->SI have to be caught in interface specific code
  63  */
  64 u8 tap_move[6][6] =
  65 {
  66 /*        TLR   RTI   SD    PD    SI    PI             */
  67         {0x7f, 0x00, 0x17, 0x0a, 0x1b, 0x16},   /* TLR */
  68         {0x7f, 0x00, 0x25, 0x05, 0x2b, 0x0b},   /* RTI */
  69         {0x7f, 0x31, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
  70         {0x7f, 0x30, 0x20, 0x17, 0x1e, 0x2f},   /* PD  */
  71         {0x7f, 0x31, 0x07, 0x17, 0x00, 0x01},   /* SI  */
  72         {0x7f, 0x30, 0x1c, 0x17, 0x20, 0x2f}    /* PI  */
  73 };
  74
  75 int tap_move_map[16] = {
  76         0, -1, -1,  2, -1,  3, -1, -1,
  77         1, -1, -1,  4, -1,  5, -1, -1
  78 };
  79
  80 tap_transition_t tap_transitions[16] =
  81 {
  82         {TAP_TLR, TAP_RTI},             /* TLR */
  83         {TAP_SIS, TAP_CD},              /* SDS */
  84         {TAP_E1D, TAP_SD},              /* CD  */
  85         {TAP_E1D, TAP_SD},              /* SD  */
  86         {TAP_UD,  TAP_PD},              /* E1D */
  87         {TAP_E2D, TAP_PD},              /* PD  */
  88         {TAP_UD,  TAP_SD},              /* E2D */
  89         {TAP_SDS, TAP_RTI},             /* UD  */
  90         {TAP_SDS, TAP_RTI},             /* RTI */
  91         {TAP_TLR, TAP_CI},              /* SIS */
  92         {TAP_E1I, TAP_SI},              /* CI  */
  93         {TAP_E1I, TAP_SI},              /* SI  */
  94         {TAP_UI,  TAP_PI},              /* E1I */
  95         {TAP_E2I, TAP_PI},              /* PI  */
  96         {TAP_UI,  TAP_SI},              /* E2I */
  97         {TAP_SDS, TAP_RTI}              /* UI  */
  98 };
  99
 100 char* jtag_event_strings[] =
 101 {
 102         "SRST asserted",
 103         "TRST asserted",
 104         "SRST released",
 105         "TRST released"
 106 };
 107
 108 enum tap_state end_state = TAP_TLR;
 109 enum tap_state cur_state = TAP_TLR;
 110 int jtag_trst = 0;
 111 int jtag_srst = 0;
 112
 113 jtag_command_t *jtag_command_queue = NULL;
 114 jtag_command_t **last_comand_pointer = &jtag_command_queue;
 115 jtag_device_t *jtag_devices = NULL;
 116 int jtag_num_devices = 0;
 117 int jtag_ir_scan_size = 0;
 118 enum reset_types jtag_reset_config = RESET_NONE;
 119 enum tap_state cmd_queue_end_state = TAP_TLR;
 120 enum tap_state cmd_queue_cur_state = TAP_TLR;
 121
 122 int jtag_verify_capture_ir = 1;
 123
 124 /* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
 125 int jtag_nsrst_delay = 0; /* default to no nSRST delay */
 126 int jtag_ntrst_delay = 0; /* default to no nTRST delay */
 127
 128 /* maximum number of JTAG devices expected in the chain
 129  */
 130 #define JTAG_MAX_CHAIN_SIZE 20
 131
 132 /* callbacks to inform high-level handlers about JTAG state changes */
 133 jtag_event_callback_t *jtag_event_callbacks;
 134
 135 /* jtag interfaces (parport, FTDI-USB, TI-USB, ...)
 136  */
 137 #if BUILD_PARPORT == 1
 138         extern jtag_interface_t parport_interface;
 139 #endif
 140
 141 #if BUILD_FT2232_FTD2XX == 1
 142         extern jtag_interface_t ft2232_interface;
 143 #endif
 144
 145 #if BUILD_FT2232_LIBFTDI == 1
 146         extern jtag_interface_t ft2232_interface;
 147 #endif
 148
 149 #if BUILD_AMTJTAGACCEL == 1
 150         extern jtag_interface_t amt_jtagaccel_interface;
 151 #endif
 152
 153 #if BUILD_EP93XX == 1
 154         extern jtag_interface_t ep93xx_interface;
 155 #endif
 156
 157 #if BUILD_AT91RM9200 == 1
 158         extern jtag_interface_t at91rm9200_interface;
 159 #endif
 160
 161 #if BUILD_GW16012 == 1
 162         extern jtag_interface_t gw16012_interface;
 163 #endif
 164
 165 #if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
 166         extern jtag_interface_t presto_interface;
 167 #endif
 168
 169 #if BUILD_USBPROG == 1
 170         extern jtag_interface_t usbprog_interface;
 171 #endif
 172
 173 jtag_interface_t *jtag_interfaces[] = {
 174 #if BUILD_PARPORT == 1
 175         &parport_interface,
 176 #endif
 177 #if BUILD_FT2232_FTD2XX == 1
 178         &ft2232_interface,
 179 #endif
 180 #if BUILD_FT2232_LIBFTDI == 1
 181         &ft2232_interface,
 182 #endif
 183 #if BUILD_AMTJTAGACCEL == 1
 184         &amt_jtagaccel_interface,
 185 #endif
 186 #if BUILD_EP93XX == 1
 187         &ep93xx_interface,
 188 #endif
 189 #if BUILD_AT91RM9200 == 1
 190         &at91rm9200_interface,
 191 #endif
 192 #if BUILD_GW16012 == 1
 193         &gw16012_interface,
 194 #endif
 195 #if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
 196         &presto_interface,
 197 #endif
 198 #if BUILD_USBPROG == 1
 199         &usbprog_interface,
 200 #endif
 201         NULL,
 202 };
 203
 204 jtag_interface_t *jtag = NULL;
 205
 206 /* configuration */
 207 char* jtag_interface = NULL;
 208 int jtag_speed = -1;
 209
 210
 211 /* forward declarations */
 212 int jtag_add_statemove(enum tap_state endstate);
 213 int jtag_add_pathmove(int num_states, enum tap_state *path);
 214 int jtag_add_runtest(int num_cycles, enum tap_state endstate);
 215 int jtag_add_reset(int trst, int srst);
 216 int jtag_add_end_state(enum tap_state endstate);
 217 int jtag_add_sleep(u32 us);
 218 int jtag_execute_queue(void);
 219 int jtag_cancel_queue(void);
 220
 221 /* jtag commands */
 222 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 223 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 224 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 225 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 226 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 227 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 228
 229 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 230
 231 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 232 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 233 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 234 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 235 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 236 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 237
 238 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 239
 240 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 241 {
 242         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 243
 244         if (callback == NULL)
 245         {
 246                 return ERROR_INVALID_ARGUMENTS;
 247         }
 248
 249         if (*callbacks_p)
 250         {
 251                 while ((*callbacks_p)->next)
 252                         callbacks_p = &((*callbacks_p)->next);
 253                 callbacks_p = &((*callbacks_p)->next);
 254         }
 255
 256         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 257         (*callbacks_p)->callback = callback;
 258         (*callbacks_p)->priv = priv;
 259         (*callbacks_p)->next = NULL;
 260
 261         return ERROR_OK;
 262 }
 263
 264 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 265 {
 266         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 267
 268         if (callback == NULL)
 269         {
 270                 return ERROR_INVALID_ARGUMENTS;
 271         }
 272
 273         while (*callbacks_p)
 274         {
 275                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 276                 if ((*callbacks_p)->callback == callback)
 277                 {
 278                         free(*callbacks_p);
 279                         *callbacks_p = *next;
 280                 }
 281                 callbacks_p = next;
 282         }
 283
 284         return ERROR_OK;
 285 }
 286
 287 int jtag_call_event_callbacks(enum jtag_event event)
 288 {
 289         jtag_event_callback_t *callback = jtag_event_callbacks;
 290
 291         DEBUG("jtag event: %s", jtag_event_strings[event]);
 292
 293         while (callback)
 294         {
 295                 callback->callback(event, callback->priv);
 296                 callback = callback->next;
 297         }
 298
 299         return ERROR_OK;
 300 }
 301
 302 /* returns a pointer to the pointer of the last command in queue
 303  * this may be a pointer to the root pointer (jtag_command_queue)
 304  * or to the next member of the last but one command
 305  */
 306 jtag_command_t** jtag_get_last_command_p(void)
 307 {
 308 /*      jtag_command_t *cmd = jtag_command_queue;
 309
 310         if (cmd)
 311                 while (cmd->next)
 312                         cmd = cmd->next;
 313         else
 314                 return &jtag_command_queue;
 315
 316         return &cmd->next;*/
 317
 318         return last_comand_pointer;
 319 }
 320
 321 /* returns a pointer to the n-th device in the scan chain */
 322 jtag_device_t* jtag_get_device(int num)
 323 {
 324         jtag_device_t *device = jtag_devices;
 325         int i = 0;
 326
 327         while (device)
 328         {
 329                 if (num == i)
 330                         return device;
 331                 device = device->next;
 332                 i++;
 333         }
 334
 335         ERROR("jtag device number %d not defined", num);
 336         exit(-1);
 337 }
 338
 339 void* cmd_queue_alloc(size_t size)
 340 {
 341         cmd_queue_page_t **p_page = &cmd_queue_pages;
 342         int offset;
 343
 344         if (*p_page)
 345         {
 346                 while ((*p_page)->next)
 347                         p_page = &((*p_page)->next);
 348                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 349                         p_page = &((*p_page)->next);
 350         }
 351
 352         if (!*p_page)
 353         {
 354                 *p_page = malloc(sizeof(cmd_queue_page_t));
 355                 (*p_page)->used = 0;
 356                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 357                 (*p_page)->next = NULL;
 358         }
 359
 360         offset = (*p_page)->used;
 361         (*p_page)->used += size;
 362
 363         u8 *t=(u8 *)((*p_page)->address);
 364         return t + offset;
 365 }
 366
 367 void cmd_queue_free()
 368 {
 369         cmd_queue_page_t *page = cmd_queue_pages;
 370
 371         while (page)
 372         {
 373                 cmd_queue_page_t *last = page;
 374                 free(page->address);
 375                 page = page->next;
 376                 free(last);
 377         }
 378
 379         cmd_queue_pages = NULL;
 380 }
 381
 382 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 383 {
 384         jtag_command_t **last_cmd;
 385         jtag_device_t *device;
 386         int i, j;
 387         int scan_size = 0;
 388
 389         if (jtag_trst == 1)
 390         {
 391                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 392                 return ERROR_JTAG_TRST_ASSERTED;
 393         }
 394
 395         last_cmd = jtag_get_last_command_p();
 396
 397         /* allocate memory for a new list member */
 398         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 399         (*last_cmd)->next = NULL;
 400         last_comand_pointer = &((*last_cmd)->next);
 401         (*last_cmd)->type = JTAG_SCAN;
 402
 403         /* allocate memory for ir scan command */
 404         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 405         (*last_cmd)->cmd.scan->ir_scan = 1;
 406         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 407         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 408         (*last_cmd)->cmd.scan->end_state = state;
 409
 410         if (state != -1)
 411                 cmd_queue_end_state = state;
 412
 413         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 414                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 415
 416         if (cmd_queue_end_state == TAP_TLR)
 417                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 418
 419         cmd_queue_cur_state = cmd_queue_end_state;
 420
 421         for (i = 0; i < jtag_num_devices; i++)
 422         {
 423                 int found = 0;
 424                 device = jtag_get_device(i);
 425                 scan_size = device->ir_length;
 426                 (*last_cmd)->cmd.scan->fields[i].device = i;
 427                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 428                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 429                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;     /* disable verification by default */
 430
 431                 /* search the list */
 432                 for (j = 0; j < num_fields; j++)
 433                 {
 434                         if (i == fields[j].device)
 435                         {
 436                                 found = 1;
 437                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 438                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 439
 440                                 if (jtag_verify_capture_ir)
 441                                 {
 442                                         if (fields[j].in_handler==NULL)
 443                                         {
 444                                                 jtag_set_check_value((*last_cmd)->cmd.scan->fields+i, device->expected, device->expected_mask, NULL);
 445                                         } else
 446                                         {
 447                                                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[j].in_handler;
 448                                                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[j].in_handler_priv;
 449                                                 (*last_cmd)->cmd.scan->fields[i].in_check_value = device->expected;
 450                                                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = device->expected_mask;
 451                                         }
 452                                 }
 453
 454                                 device->bypass = 0;
 455                                 break;
 456                         }
 457                 }
 458
 459                 if (!found)
 460                 {
 461                         /* if a device isn't listed, set it to BYPASS */
 462                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 463                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 464                         device->bypass = 1;
 465
 466                 }
 467
 468                 /* update device information */
 469                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 470         }
 471
 472         return ERROR_OK;
 473 }
 474
 475 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 476 {
 477         jtag_command_t **last_cmd;
 478         int i;
 479
 480         if (jtag_trst == 1)
 481         {
 482                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 483                 return ERROR_JTAG_TRST_ASSERTED;
 484         }
 485
 486         last_cmd = jtag_get_last_command_p();
 487
 488         /* allocate memory for a new list member */
 489         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 490         (*last_cmd)->next = NULL;
 491         last_comand_pointer = &((*last_cmd)->next);
 492         (*last_cmd)->type = JTAG_SCAN;
 493
 494         /* allocate memory for ir scan command */
 495         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 496         (*last_cmd)->cmd.scan->ir_scan = 1;
 497         (*last_cmd)->cmd.scan->num_fields = num_fields;
 498         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 499         (*last_cmd)->cmd.scan->end_state = state;
 500
 501         if (state != -1)
 502                 cmd_queue_end_state = state;
 503
 504         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 505                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 506
 507         if (cmd_queue_end_state == TAP_TLR)
 508                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 509
 510         cmd_queue_cur_state = cmd_queue_end_state;
 511
 512         for (i = 0; i < num_fields; i++)
 513         {
 514                 int num_bits = fields[i].num_bits;
 515                 int num_bytes = CEIL(fields[i].num_bits, 8);
 516                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 517                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 518                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 519                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 520                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 521                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 522                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 523                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 524                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 525         }
 526         return ERROR_OK;
 527 }
 528
 529 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 530 {
 531         int i, j;
 532         int bypass_devices = 0;
 533         int field_count = 0;
 534         jtag_command_t **last_cmd = jtag_get_last_command_p();
 535         jtag_device_t *device = jtag_devices;
 536         int scan_size;
 537
 538         if (jtag_trst == 1)
 539         {
 540                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 541                 return ERROR_JTAG_TRST_ASSERTED;
 542         }
 543
 544         /* count devices in bypass */
 545         while (device)
 546         {
 547                 if (device->bypass)
 548                         bypass_devices++;
 549                 device = device->next;
 550         }
 551
 552         /* allocate memory for a new list member */
 553         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 554         last_comand_pointer = &((*last_cmd)->next);
 555         (*last_cmd)->next = NULL;
 556         (*last_cmd)->type = JTAG_SCAN;
 557
 558         /* allocate memory for dr scan command */
 559         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 560         (*last_cmd)->cmd.scan->ir_scan = 0;
 561         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 562         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 563         (*last_cmd)->cmd.scan->end_state = state;
 564
 565         if (state != -1)
 566                 cmd_queue_end_state = state;
 567
 568         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 569                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 570
 571         if (cmd_queue_end_state == TAP_TLR)
 572                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 573
 574         cmd_queue_cur_state = cmd_queue_end_state;
 575
 576         for (i = 0; i < jtag_num_devices; i++)
 577         {
 578                 int found = 0;
 579                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 580
 581                 for (j = 0; j < num_fields; j++)
 582                 {
 583                         if (i == fields[j].device)
 584                         {
 585                                 found = 1;
 586                                 scan_size = fields[j].num_bits;
 587                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 588                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 589                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 590                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 591                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_value = fields[j].in_check_value;
 592                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = fields[j].in_check_mask;
 593                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 594                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 595                         }
 596                 }
 597                 if (!found)
 598                 {
 599                         /* if a device isn't listed, the BYPASS register should be selected */
 600                         if (!jtag_get_device(i)->bypass)
 601                         {
 602                                 ERROR("BUG: no scan data for a device not in BYPASS");
 603                                 exit(-1);
 604                         }
 605
 606                         /* program the scan field to 1 bit length, and ignore it's value */
 607                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 608                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 609                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 610                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 611                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 612                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 613                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 614                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 615                 }
 616                 else
 617                 {
 618                         /* if a device is listed, the BYPASS register must not be selected */
 619                         if (jtag_get_device(i)->bypass)
 620                         {
 621                                 WARNING("scan data for a device in BYPASS");
 622                         }
 623                 }
 624         }
 625         return ERROR_OK;
 626 }
 627
 628 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, void *dummy_anachronism)
 629 {
 630         int i;
 631         jtag_command_t **last_cmd = jtag_get_last_command_p();
 632
 633         if (jtag_trst == 1)
 634         {
 635                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 636                 return ERROR_JTAG_TRST_ASSERTED;
 637         }
 638
 639         /* allocate memory for a new list member */
 640         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 641         last_comand_pointer = &((*last_cmd)->next);
 642         (*last_cmd)->next = NULL;
 643         (*last_cmd)->type = JTAG_SCAN;
 644
 645         /* allocate memory for scan command */
 646         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 647         (*last_cmd)->cmd.scan->ir_scan = 0;
 648         (*last_cmd)->cmd.scan->num_fields = num_fields;
 649         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 650         (*last_cmd)->cmd.scan->end_state = state;
 651
 652         if (state != -1)
 653                 cmd_queue_end_state = state;
 654
 655         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 656                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 657
 658         if (cmd_queue_end_state == TAP_TLR)
 659                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 660
 661         cmd_queue_cur_state = cmd_queue_end_state;
 662
 663         for (i = 0; i < num_fields; i++)
 664         {
 665                 int num_bits = fields[i].num_bits;
 666                 int num_bytes = CEIL(fields[i].num_bits, 8);
 667                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 668                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 669                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 670                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 671                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 672                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 673                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 674                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 675                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 676         }
 677
 678         return ERROR_OK;
 679 }
 680 int jtag_add_statemove(enum tap_state state)
 681 {
 682         jtag_command_t **last_cmd = jtag_get_last_command_p();
 683
 684         if (jtag_trst == 1)
 685         {
 686                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 687                 return ERROR_JTAG_TRST_ASSERTED;
 688         }
 689
 690         /* allocate memory for a new list member */
 691         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 692         last_comand_pointer = &((*last_cmd)->next);
 693         (*last_cmd)->next = NULL;
 694         (*last_cmd)->type = JTAG_STATEMOVE;
 695
 696         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 697         (*last_cmd)->cmd.statemove->end_state = state;
 698
 699         if (state != -1)
 700                 cmd_queue_end_state = state;
 701
 702         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 703                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 704
 705         if (cmd_queue_end_state == TAP_TLR)
 706                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 707
 708         cmd_queue_cur_state = cmd_queue_end_state;
 709
 710         return ERROR_OK;
 711 }
 712
 713 int jtag_add_pathmove(int num_states, enum tap_state *path)
 714 {
 715         jtag_command_t **last_cmd = jtag_get_last_command_p();
 716         int i;
 717
 718         if (jtag_trst == 1)
 719         {
 720                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 721                 return ERROR_JTAG_TRST_ASSERTED;
 722         }
 723
 724         /* the last state has to be a stable state */
 725         if (tap_move_map[path[num_states - 1]] == -1)
 726         {
 727                 ERROR("TAP path doesn't finish in a stable state");
 728                 return ERROR_JTAG_NOT_IMPLEMENTED;
 729         }
 730
 731         if (jtag->support_pathmove)
 732         {
 733                 /* allocate memory for a new list member */
 734                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 735                 last_comand_pointer = &((*last_cmd)->next);
 736                 (*last_cmd)->next = NULL;
 737                 (*last_cmd)->type = JTAG_PATHMOVE;
 738
 739                 (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 740                 (*last_cmd)->cmd.pathmove->num_states = num_states;
 741                 (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 742
 743                 for (i = 0; i < num_states; i++)
 744                         (*last_cmd)->cmd.pathmove->path[i] = path[i];
 745         }
 746         else
 747         {
 748                 /* validate the desired path, and see if it fits a default path */
 749                 int begin = 0;
 750                 int end = 0;
 751                 int j;
 752
 753                 for (i = 0; i < num_states; i++)
 754                 {
 755                         for (j = i; j < num_states; j++)
 756                         {
 757                                 if (tap_move_map[path[j]] != -1)
 758                                 {
 759                                         end = j;
 760                                         break;
 761                                 }
 762                         }
 763
 764                         if (begin - end <= 7)   /* a default path spans no more than 7 states */
 765                         {
 766                                 jtag_add_statemove(path[end]);
 767                         }
 768                         else
 769                         {
 770                                 ERROR("encountered a TAP path that can't be fulfilled by default paths");
 771                                 return ERROR_JTAG_NOT_IMPLEMENTED;
 772                         }
 773
 774                         i = end;
 775                 }
 776         }
 777
 778         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 779                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 780
 781         if (cmd_queue_end_state == TAP_TLR)
 782                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 783
 784         cmd_queue_cur_state = path[num_states - 1];
 785
 786         return ERROR_OK;
 787 }
 788
 789 int jtag_add_runtest(int num_cycles, enum tap_state state)
 790 {
 791         jtag_command_t **last_cmd = jtag_get_last_command_p();
 792
 793         if (jtag_trst == 1)
 794         {
 795                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 796                 return ERROR_JTAG_TRST_ASSERTED;
 797         }
 798
 799         /* allocate memory for a new list member */
 800         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 801         (*last_cmd)->next = NULL;
 802         last_comand_pointer = &((*last_cmd)->next);
 803         (*last_cmd)->type = JTAG_RUNTEST;
 804
 805         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 806         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 807         (*last_cmd)->cmd.runtest->end_state = state;
 808
 809         if (state != -1)
 810                 cmd_queue_end_state = state;
 811
 812         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 813                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 814
 815         if (cmd_queue_end_state == TAP_TLR)
 816                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 817
 818         cmd_queue_cur_state = cmd_queue_end_state;
 819
 820         return ERROR_OK;
 821 }
 822
 823 int jtag_add_reset(int req_trst, int req_srst)
 824 {
 825         int trst_with_tms = 0;
 826
 827         jtag_command_t **last_cmd = jtag_get_last_command_p();
 828
 829         if (req_trst == -1)
 830                 req_trst = jtag_trst;
 831
 832         if (req_srst == -1)
 833                 req_srst = jtag_srst;
 834
 835         /* Make sure that jtag_reset_config allows the requested reset */
 836         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 837         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 838                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 839
 840         /* if TRST pulls SRST, we reset with TAP T-L-R */
 841         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 842         {
 843                 req_trst = 0;
 844                 trst_with_tms = 1;
 845         }
 846
 847         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 848         {
 849                 ERROR("requested nSRST assertion, but the current configuration doesn't support this");
 850                 return ERROR_JTAG_RESET_CANT_SRST;
 851         }
 852
 853         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 854         {
 855                 req_trst = 0;
 856                 trst_with_tms = 1;
 857         }
 858
 859         /* allocate memory for a new list member */
 860         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 861         (*last_cmd)->next = NULL;
 862         last_comand_pointer = &((*last_cmd)->next);
 863         (*last_cmd)->type = JTAG_RESET;
 864
 865         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 866         (*last_cmd)->cmd.reset->trst = req_trst;
 867         (*last_cmd)->cmd.reset->srst = req_srst;
 868
 869         jtag_trst = req_trst;
 870         jtag_srst = req_srst;
 871
 872         if (jtag_srst)
 873         {
 874                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 875         }
 876         else
 877         {
 878                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 879                 if (jtag_nsrst_delay)
 880                         jtag_add_sleep(jtag_nsrst_delay * 1000);
 881         }
 882
 883         if (trst_with_tms)
 884         {
 885                 last_cmd = &((*last_cmd)->next);
 886
 887                 /* allocate memory for a new list member */
 888                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 889                 (*last_cmd)->next = NULL;
 890                 last_comand_pointer = &((*last_cmd)->next);
 891                 (*last_cmd)->type = JTAG_STATEMOVE;
 892
 893                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 894                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 895
 896                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 897                 cmd_queue_cur_state = TAP_TLR;
 898                 cmd_queue_end_state = TAP_TLR;
 899
 900                 return ERROR_OK;
 901         }
 902         else
 903         {
 904                 if (jtag_trst)
 905                 {
 906                         /* we just asserted nTRST, so we're now in Test-Logic-Reset,
 907                          * and inform possible listeners about this
 908                          */
 909                         cmd_queue_cur_state = TAP_TLR;
 910                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 911                 }
 912                 else
 913                 {
 914                         /* the nTRST line got deasserted, so we're still in Test-Logic-Reset,
 915                          * but we might want to add a delay to give the TAP time to settle
 916                          */
 917                         if (jtag_ntrst_delay)
 918                                 jtag_add_sleep(jtag_ntrst_delay * 1000);
 919                 }
 920         }
 921
 922         return ERROR_OK;
 923 }
 924
 925 int jtag_add_end_state(enum tap_state state)
 926 {
 927         jtag_command_t **last_cmd = jtag_get_last_command_p();
 928
 929         /* allocate memory for a new list member */
 930         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 931         (*last_cmd)->next = NULL;
 932         last_comand_pointer = &((*last_cmd)->next);
 933         (*last_cmd)->type = JTAG_END_STATE;
 934
 935         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 936         (*last_cmd)->cmd.end_state->end_state = state;
 937
 938         if (state != -1)
 939                 cmd_queue_end_state = state;
 940
 941         return ERROR_OK;
 942 }
 943
 944 int jtag_add_sleep(u32 us)
 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_SLEEP;
 953
 954         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 955         (*last_cmd)->cmd.sleep->us = us;
 956
 957         return ERROR_OK;
 958 }
 959
 960 int jtag_scan_size(scan_command_t *cmd)
 961 {
 962         int bit_count = 0;
 963         int i;
 964
 965         /* count bits in scan command */
 966         for (i = 0; i < cmd->num_fields; i++)
 967         {
 968                 bit_count += cmd->fields[i].num_bits;
 969         }
 970
 971         return bit_count;
 972 }
 973
 974 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 975 {
 976         int bit_count = 0;
 977         int i;
 978
 979         bit_count = jtag_scan_size(cmd);
 980         *buffer = malloc(CEIL(bit_count, 8));
 981
 982         bit_count = 0;
 983
 984         for (i = 0; i < cmd->num_fields; i++)
 985         {
 986                 if (cmd->fields[i].out_value)
 987                 {
 988 #ifdef _DEBUG_JTAG_IO_
 989                         char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > 64) ? 64 : cmd->fields[i].num_bits, 16);
 990 #endif
 991                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
 992 #ifdef _DEBUG_JTAG_IO_
 993                         DEBUG("fields[%i].out_value: 0x%s", i, char_buf);
 994                         free(char_buf);
 995 #endif
 996                 }
 997
 998                 bit_count += cmd->fields[i].num_bits;
 999         }
1000
1001         return bit_count;
1002
1003 }
1004
1005 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
1006 {
1007         int i;
1008         int bit_count = 0;
1009         int retval;
1010
1011         /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
1012         retval = ERROR_OK;
1013
1014         for (i = 0; i < cmd->num_fields; i++)
1015         {
1016                 /* if neither in_value nor in_handler
1017                  * are specified we don't have to examine this field
1018                  */
1019                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
1020                 {
1021                         int num_bits = cmd->fields[i].num_bits;
1022                         u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
1023
1024 #ifdef _DEBUG_JTAG_IO_
1025                         char *char_buf;
1026
1027                         char_buf = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1028                         DEBUG("fields[%i].in_value: 0x%s", i, char_buf);
1029                         free(char_buf);
1030 #endif
1031
1032                         if (cmd->fields[i].in_value)
1033                         {
1034                                 buf_cpy(captured, cmd->fields[i].in_value, num_bits);
1035
1036                                 if (cmd->fields[i].in_handler)
1037                                 {
1038                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1039                                         {
1040                                                 WARNING("in_handler reported a failed check");
1041                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1042                                         }
1043                                 }
1044                         }
1045
1046                         /* no in_value specified, but a handler takes care of the scanned data */
1047                         if (cmd->fields[i].in_handler && (!cmd->fields[i].in_value))
1048                         {
1049                                 if (cmd->fields[i].in_handler(captured, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1050                                 {
1051                                         /* We're going to call the error:handler later, but if the in_handler
1052                                          * reported an error we report this failure upstream
1053                                          */
1054                                         WARNING("in_handler reported a failed check");
1055                                         retval = ERROR_JTAG_QUEUE_FAILED;
1056                                 }
1057                         }
1058
1059                         free(captured);
1060                 }
1061                 bit_count += cmd->fields[i].num_bits;
1062         }
1063
1064         return retval;
1065 }
1066
1067 int jtag_check_value(u8 *captured, void *priv, scan_field_t *field)
1068 {
1069         int retval = ERROR_OK;
1070         int num_bits = field->num_bits;
1071
1072         int compare_failed = 0;
1073
1074         if (field->in_check_mask)
1075                 compare_failed = buf_cmp_mask(captured, field->in_check_value, field->in_check_mask, num_bits);
1076         else
1077                 compare_failed = buf_cmp(captured, field->in_check_value, num_bits);
1078
1079         if (compare_failed)
1080                 {
1081                 /* An error handler could have caught the failing check
1082                  * only report a problem when there wasn't a handler, or if the handler
1083                  * acknowledged the error
1084                  */
1085                 if (compare_failed)
1086                 {
1087                         char *captured_char = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1088                         char *in_check_value_char = buf_to_str(field->in_check_value, (num_bits > 64) ? 64 : num_bits, 16);
1089
1090                         if (field->in_check_mask)
1091                         {
1092                                 char *in_check_mask_char;
1093                                 in_check_mask_char = buf_to_str(field->in_check_mask, (num_bits > 64) ? 64 : num_bits, 16);
1094                                 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);
1095                                 free(in_check_mask_char);
1096                         }
1097                         else
1098                         {
1099                                 WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
1100                         }
1101
1102                         free(captured_char);
1103                         free(in_check_value_char);
1104                 }
1105
1106         }
1107         return retval;
1108 }
1109
1110 /*
1111   set up checking of this field using the in_handler. The values passed in must be valid until
1112   after jtag_execute() has completed.
1113  */
1114 void jtag_set_check_value(scan_field_t *field, u8 *value, u8 *mask, error_handler_t *in_error_handler)
1115 {
1116         if (value)
1117                 field->in_handler = jtag_check_value;
1118         else
1119                 field->in_handler = NULL;       /* No check, e.g. embeddedice uses value==NULL to indicate no check */
1120         field->in_handler_priv = NULL;  /* this will be filled in at the invocation site to point to the field duplicate */
1121         field->in_check_value = value;
1122         field->in_check_mask = mask;
1123 }
1124
1125 enum scan_type jtag_scan_type(scan_command_t *cmd)
1126 {
1127         int i;
1128         int type = 0;
1129
1130         for (i = 0; i < cmd->num_fields; i++)
1131         {
1132                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
1133                         type |= SCAN_IN;
1134                 if (cmd->fields[i].out_value)
1135                         type |= SCAN_OUT;
1136         }
1137
1138         return type;
1139 }
1140
1141 int jtag_execute_queue(void)
1142 {
1143         int retval;
1144
1145         retval = jtag->execute_queue();
1146
1147         cmd_queue_free();
1148
1149         jtag_command_queue = NULL;
1150         last_comand_pointer = &jtag_command_queue;
1151
1152         return retval;
1153 }
1154
1155 int jtag_cancel_queue(void)
1156 {
1157         cmd_queue_free();
1158         jtag_command_queue = NULL;
1159         last_comand_pointer = &jtag_command_queue;
1160
1161         return ERROR_OK;
1162 }
1163
1164 int jtag_reset_callback(enum jtag_event event, void *priv)
1165 {
1166         jtag_device_t *device = priv;
1167
1168         DEBUG("-");
1169
1170         if (event == JTAG_TRST_ASSERTED)
1171         {
1172                 buf_set_ones(device->cur_instr, device->ir_length);
1173                 device->bypass = 1;
1174         }
1175
1176         return ERROR_OK;
1177 }
1178
1179 void jtag_sleep(u32 us)
1180 {
1181         usleep(us);
1182 }
1183
1184 /* Try to examine chain layout according to IEEE 1149.1 §12
1185  */
1186 int jtag_examine_chain()
1187 {
1188         jtag_device_t *device = jtag_devices;
1189         scan_field_t field;
1190         u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
1191         int i;
1192         int bit_count;
1193         int device_count = 0;
1194         u8 zero_check = 0x0;
1195         u8 one_check = 0xff;
1196
1197         field.device = 0;
1198         field.num_bits = sizeof(idcode_buffer) * 8;
1199         field.out_value = idcode_buffer;
1200         field.out_mask = NULL;
1201         field.in_value = idcode_buffer;
1202         field.in_check_value = NULL;
1203         field.in_check_mask = NULL;
1204         field.in_handler = NULL;
1205         field.in_handler_priv = NULL;
1206
1207         for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
1208         {
1209                 buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
1210         }
1211
1212         jtag_add_plain_dr_scan(1, &field, TAP_TLR, NULL);
1213         jtag_execute_queue();
1214
1215         for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++)
1216         {
1217                 zero_check |= idcode_buffer[i];
1218                 one_check &= idcode_buffer[i];
1219         }
1220
1221         /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */
1222         if ((zero_check == 0x00) || (one_check == 0xff))
1223         {
1224                 ERROR("JTAG communication failure, check connection, JTAG interface, target power etc.");
1225                 return ERROR_JTAG_INIT_FAILED;
1226         }
1227
1228         for (bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
1229         {
1230                 u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
1231                 if ((idcode & 1) == 0)
1232                 {
1233                         /* LSB must not be 0, this indicates a device in bypass */
1234                         device_count++;
1235
1236                         bit_count += 1;
1237                 }
1238                 else
1239                 {
1240                         u32 manufacturer;
1241                         u32 part;
1242                         u32 version;
1243
1244                         if (idcode == 0x000000FF)
1245                         {
1246                                 /* End of chain (invalid manufacturer ID) */
1247                                 break;
1248                         }
1249
1250                         if (device)
1251                         {
1252                                 device->idcode = idcode;
1253                                 device = device->next;
1254                         }
1255                         device_count++;
1256
1257                         manufacturer = (idcode & 0xffe) >> 1;
1258                         part = (idcode & 0xffff000) >> 12;
1259                         version = (idcode & 0xf0000000) >> 28;
1260
1261                         INFO("JTAG device found: 0x%8.8x (Manufacturer: 0x%3.3x, Part: 0x%4.4x, Version: 0x%1.1x)",
1262                                 idcode, manufacturer, part, version);
1263
1264                         bit_count += 32;
1265                 }
1266         }
1267
1268         /* see if number of discovered devices matches configuration */
1269         if (device_count != jtag_num_devices)
1270         {
1271                 ERROR("number of discovered devices in JTAG chain (%i) doesn't match configuration (%i)",
1272                         device_count, jtag_num_devices);
1273                 ERROR("check the config file and ensure proper JTAG communication (connections, speed, ...)");
1274                 return ERROR_JTAG_INIT_FAILED;
1275         }
1276
1277         return ERROR_OK;
1278 }
1279
1280 int jtag_validate_chain()
1281 {
1282         jtag_device_t *device = jtag_devices;
1283         int total_ir_length = 0;
1284         u8 *ir_test = NULL;
1285         scan_field_t field;
1286         int chain_pos = 0;
1287
1288         while (device)
1289         {
1290                 total_ir_length += device->ir_length;
1291                 device = device->next;
1292         }
1293
1294         total_ir_length += 2;
1295         ir_test = malloc(CEIL(total_ir_length, 8));
1296         buf_set_ones(ir_test, total_ir_length);
1297
1298         field.device = 0;
1299         field.num_bits = total_ir_length;
1300         field.out_value = ir_test;
1301         field.out_mask = NULL;
1302         field.in_value = ir_test;
1303         field.in_check_value = NULL;
1304         field.in_check_mask = NULL;
1305         field.in_handler = NULL;
1306         field.in_handler_priv = NULL;
1307
1308         jtag_add_plain_ir_scan(1, &field, TAP_TLR, NULL);
1309         jtag_execute_queue();
1310
1311         device = jtag_devices;
1312         while (device)
1313         {
1314                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1315                 {
1316                         char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1317                         ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1318                         free(cbuf);
1319                         free(ir_test);
1320                         return ERROR_JTAG_INIT_FAILED;
1321                 }
1322                 chain_pos += device->ir_length;
1323                 device = device->next;
1324         }
1325
1326         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1327         {
1328                 char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1329                 ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1330                 free(cbuf);
1331                 free(ir_test);
1332                 return ERROR_JTAG_INIT_FAILED;
1333         }
1334
1335         free(ir_test);
1336
1337         return ERROR_OK;
1338 }
1339
1340 int jtag_register_commands(struct command_context_s *cmd_ctx)
1341 {
1342         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1343                 COMMAND_CONFIG, NULL);
1344         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1345                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1346         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1347                 COMMAND_CONFIG, NULL);
1348         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1349                 COMMAND_CONFIG, NULL);
1350         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
1351                 COMMAND_CONFIG, NULL);
1352         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
1353                 COMMAND_CONFIG, NULL);
1354
1355         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1356                 COMMAND_EXEC, "print current scan chain configuration");
1357
1358         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1359                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1360         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1361                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1362         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1363                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1364         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1365                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1366         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1367                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1368         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1369                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1370
1371         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1372                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1373         return ERROR_OK;
1374 }
1375
1376 int jtag_init(struct command_context_s *cmd_ctx)
1377 {
1378         int i, validate_tries = 0;
1379
1380         DEBUG("-");
1381
1382         if (jtag_speed == -1)
1383                 jtag_speed = 0;
1384
1385         if (jtag_interface && (jtag_interface[0] != 0))
1386                 /* configuration var 'jtag_interface' is set, and not empty */
1387                 for (i = 0; jtag_interfaces[i]; i++)
1388                 {
1389                         if (strcmp(jtag_interface, jtag_interfaces[i]->name) == 0)
1390                         {
1391                                 jtag_device_t *device;
1392                                 device = jtag_devices;
1393
1394                                 if (jtag_interfaces[i]->init() != ERROR_OK)
1395                                         return ERROR_JTAG_INIT_FAILED;
1396                                 jtag = jtag_interfaces[i];
1397
1398                                 jtag_ir_scan_size = 0;
1399                                 jtag_num_devices = 0;
1400                                 while (device != NULL)
1401                                 {
1402                                         jtag_ir_scan_size += device->ir_length;
1403                                         jtag_num_devices++;
1404                                         device = device->next;
1405                                 }
1406
1407                                 jtag_add_statemove(TAP_TLR);
1408                                 jtag_execute_queue();
1409
1410                                 /* examine chain first, as this could discover the real chain layout */
1411                                 if (jtag_examine_chain() != ERROR_OK)
1412                                 {
1413                                         ERROR("trying to validate configured JTAG chain anyway...");
1414                                 }
1415
1416                                 while (jtag_validate_chain() != ERROR_OK)
1417                                 {
1418                                         validate_tries++;
1419                                         if (validate_tries > 5)
1420                                         {
1421                                                 ERROR("Could not validate JTAG chain, exit");
1422                                                 jtag = NULL;
1423                                                 return ERROR_JTAG_INVALID_INTERFACE;
1424                                         }
1425                                         usleep(10000);
1426                                 }
1427
1428                                 return ERROR_OK;
1429                         }
1430                 }
1431
1432         /* no valid interface was found (i.e. the configuration option,
1433          * didn't match one of the compiled-in interfaces
1434          */
1435         ERROR("No valid jtag interface found (%s)", jtag_interface);
1436         ERROR("compiled-in jtag interfaces:");
1437         for (i = 0; jtag_interfaces[i]; i++)
1438         {
1439                 ERROR("%i: %s", i, jtag_interfaces[i]->name);
1440         }
1441
1442         jtag = NULL;
1443         return ERROR_JTAG_INVALID_INTERFACE;
1444 }
1445
1446 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1447 {
1448         int i;
1449
1450         /* only if the configuration var isn't overwritten from cmdline */
1451         if (!jtag_interface)
1452         {
1453                 if (args[0] && (args[0][0] != 0))
1454                 {
1455                         for (i=0; jtag_interfaces[i]; i++)
1456                         {
1457                                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1458                                 {
1459                                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1460                                                 exit(-1);
1461
1462                                         jtag_interface = jtag_interfaces[i]->name;
1463
1464                                         return ERROR_OK;
1465                                 }
1466                         }
1467                 }
1468
1469                 /* remember the requested interface name, so we can complain about it later */
1470                 jtag_interface = strdup(args[0]);
1471                 DEBUG("'interface' command didn't specify a valid interface");
1472         }
1473
1474         return ERROR_OK;
1475 }
1476
1477 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1478 {
1479         jtag_device_t **last_device_p = &jtag_devices;
1480
1481         if (*last_device_p)
1482         {
1483                 while ((*last_device_p)->next)
1484                         last_device_p = &((*last_device_p)->next);
1485                 last_device_p = &((*last_device_p)->next);
1486         }
1487
1488         if (argc < 3)
1489                 return ERROR_OK;
1490
1491         *last_device_p = malloc(sizeof(jtag_device_t));
1492         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1493
1494         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1495         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1496         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1497         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1498
1499         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1500         (*last_device_p)->bypass = 1;
1501         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1502
1503         (*last_device_p)->next = NULL;
1504
1505         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1506
1507         jtag_num_devices++;
1508
1509         return ERROR_OK;
1510 }
1511
1512 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1513 {
1514         jtag_device_t *device = jtag_devices;
1515         int device_count = 0;
1516
1517         while (device)
1518         {
1519                 u32 expected, expected_mask, cur_instr;
1520                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1521                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1522                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1523                 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);
1524                 device = device->next;
1525                 device_count++;
1526         }
1527
1528         return ERROR_OK;
1529 }
1530
1531 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1532 {
1533         if (argc >= 1)
1534         {
1535                 if (strcmp(args[0], "none") == 0)
1536                         jtag_reset_config = RESET_NONE;
1537                 else if (strcmp(args[0], "trst_only") == 0)
1538                         jtag_reset_config = RESET_HAS_TRST;
1539                 else if (strcmp(args[0], "srst_only") == 0)
1540                         jtag_reset_config = RESET_HAS_SRST;
1541                 else if (strcmp(args[0], "trst_and_srst") == 0)
1542                         jtag_reset_config = RESET_TRST_AND_SRST;
1543                 else
1544                 {
1545                         ERROR("invalid reset_config argument, defaulting to none");
1546                         jtag_reset_config = RESET_NONE;
1547                         return ERROR_INVALID_ARGUMENTS;
1548                 }
1549         }
1550
1551         if (argc >= 2)
1552         {
1553                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1554                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1555                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1556                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1557                 else if (strcmp(args[1], "combined") == 0)
1558                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1559                 else if (strcmp(args[1], "separate") == 0)
1560                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1561                 else
1562                 {
1563                         ERROR("invalid reset_config argument, defaulting to none");
1564                         jtag_reset_config = RESET_NONE;
1565                         return ERROR_INVALID_ARGUMENTS;
1566                 }
1567         }
1568
1569         if (argc >= 3)
1570         {
1571                 if (strcmp(args[2], "trst_open_drain") == 0)
1572                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1573                 else if (strcmp(args[2], "trst_push_pull") == 0)
1574                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1575                 else
1576                 {
1577                         ERROR("invalid reset_config argument, defaulting to none");
1578                         jtag_reset_config = RESET_NONE;
1579                         return ERROR_INVALID_ARGUMENTS;
1580                 }
1581         }
1582
1583         if (argc >= 4)
1584         {
1585                 if (strcmp(args[3], "srst_push_pull") == 0)
1586                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1587                 else if (strcmp(args[3], "srst_open_drain") == 0)
1588                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1589                 else
1590                 {
1591                         ERROR("invalid reset_config argument, defaulting to none");
1592                         jtag_reset_config = RESET_NONE;
1593                         return ERROR_INVALID_ARGUMENTS;
1594                 }
1595         }
1596
1597         return ERROR_OK;
1598 }
1599
1600 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1601 {
1602         if (argc < 1)
1603         {
1604                 ERROR("jtag_nsrst_delay <ms> command takes one required argument");
1605                 exit(-1);
1606         }
1607         else
1608         {
1609                 jtag_nsrst_delay = strtoul(args[0], NULL, 0);
1610         }
1611
1612         return ERROR_OK;
1613 }
1614
1615 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1616 {
1617         if (argc < 1)
1618         {
1619                 ERROR("jtag_ntrst_delay <ms> command takes one required argument");
1620                 exit(-1);
1621         }
1622         else
1623         {
1624                 jtag_ntrst_delay = strtoul(args[0], NULL, 0);
1625         }
1626
1627         return ERROR_OK;
1628 }
1629
1630 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1631 {
1632         if (argc == 0)
1633                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1634
1635         if (argc > 0)
1636         {
1637                 /* this command can be called during CONFIG,
1638                  * in which case jtag isn't initialized */
1639                 if (jtag)
1640                         jtag->speed(strtoul(args[0], NULL, 0));
1641                 else
1642                         jtag_speed = strtoul(args[0], NULL, 0);
1643         }
1644
1645         return ERROR_OK;
1646 }
1647
1648 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1649 {
1650         enum tap_state state;
1651
1652         if (argc < 1)
1653         {
1654                 command_print(cmd_ctx, "usage: endstate <tap_state>");
1655         }
1656         else
1657         {
1658                 for (state = 0; state < 16; state++)
1659                 {
1660                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1661                         {
1662                                 jtag_add_end_state(state);
1663                                 jtag_execute_queue();
1664                         }
1665                 }
1666         }
1667         command_print(cmd_ctx, "current endstate: %s", tap_state_strings[end_state]);
1668
1669         return ERROR_OK;
1670 }
1671
1672 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1673 {
1674         int trst = -1;
1675         int srst = -1;
1676         char *usage = "usage: jtag_reset <trst> <srst>";
1677         int retval;
1678
1679         if (argc < 1)
1680         {
1681                 command_print(cmd_ctx, usage);
1682                 return ERROR_OK;
1683         }
1684
1685         if (args[0][0] == '1')
1686                 trst = 1;
1687         else if (args[0][0] == '0')
1688                 trst = 0;
1689         else
1690         {
1691                 command_print(cmd_ctx, usage);
1692                 return ERROR_OK;
1693         }
1694
1695         if (args[1][0] == '1')
1696                 srst = 1;
1697         else if (args[1][0] == '0')
1698                 srst = 0;
1699         else
1700         {
1701                 command_print(cmd_ctx, usage);
1702                 return ERROR_OK;
1703         }
1704
1705         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1706         {
1707                 switch (retval)
1708                 {
1709                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1710                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1711                                 break;
1712                         case ERROR_JTAG_RESET_CANT_SRST:
1713                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1714                                 break;
1715                         default:
1716                                 command_print(cmd_ctx, "unknown error");
1717                 }
1718         }
1719         jtag_execute_queue();
1720
1721         return ERROR_OK;
1722 }
1723
1724 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1725 {
1726         if (argc < 1)
1727         {
1728                 command_print(cmd_ctx, "usage: runtest <num_cycles>");
1729                 return ERROR_OK;
1730         }
1731
1732         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1733         jtag_execute_queue();
1734
1735         return ERROR_OK;
1736
1737 }
1738
1739 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1740 {
1741         enum tap_state state;
1742
1743         state = -1;
1744         if (argc == 1)
1745         {
1746                 for (state = 0; state < 16; state++)
1747                 {
1748                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1749                         {
1750                                 break;
1751                         }
1752                 }
1753         }
1754
1755         jtag_add_statemove(state);
1756         jtag_execute_queue();
1757
1758         return ERROR_OK;
1759
1760 }
1761
1762 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1763 {
1764         int i;
1765         scan_field_t *fields;
1766
1767         if ((argc < 2) || (argc % 2))
1768         {
1769                 command_print(cmd_ctx, "usage: irscan <device> <instr> [dev2] [instr2] ...");
1770                 return ERROR_OK;
1771         }
1772
1773         fields = malloc(sizeof(scan_field_t) * argc / 2);
1774
1775         for (i = 0; i < argc / 2; i++)
1776         {
1777                 int device = strtoul(args[i*2], NULL, 0);
1778                 int field_size = jtag_get_device(device)->ir_length;
1779                 fields[i].device = device;
1780                 fields[i].out_value = malloc(CEIL(field_size, 8));
1781                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1782                 fields[i].out_mask = NULL;
1783                 fields[i].in_value = NULL;
1784                 fields[i].in_check_mask = NULL;
1785                 fields[i].in_handler = NULL;
1786                 fields[i].in_handler_priv = NULL;
1787         }
1788
1789         jtag_add_ir_scan(argc / 2, fields, -1, NULL);
1790         jtag_execute_queue();
1791
1792         for (i = 0; i < argc / 2; i++)
1793                 free(fields[i].out_value);
1794
1795         free (fields);
1796
1797         return ERROR_OK;
1798 }
1799
1800 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1801 {
1802         scan_field_t *fields;
1803         int num_fields = 0;
1804         int field_count = 0;
1805         var_t *var;
1806         int i, j;
1807
1808         if ((argc < 2) || (argc % 2))
1809         {
1810                 command_print(cmd_ctx, "usage: drscan <device> <var> [dev2] [var2]");
1811                 return ERROR_OK;
1812         }
1813
1814         for (i = 0; i < argc; i+=2)
1815         {
1816                 var = get_var_by_namenum(args[i+1]);
1817                 if (var)
1818                 {
1819                         num_fields += var->num_fields;
1820                 }
1821                 else
1822                 {
1823                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1824                         return ERROR_OK;
1825                 }
1826         }
1827
1828         fields = malloc(sizeof(scan_field_t) * num_fields);
1829
1830         for (i = 0; i < argc; i+=2)
1831         {
1832                 var = get_var_by_namenum(args[i+1]);
1833
1834                 for (j = 0; j < var->num_fields; j++)
1835                 {
1836                         fields[field_count].device = strtol(args[i], NULL, 0);
1837                         fields[field_count].num_bits = var->fields[j].num_bits;
1838                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1839                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1840                         fields[field_count].out_mask = NULL;
1841                         fields[field_count].in_value = fields[field_count].out_value;
1842                         fields[field_count].in_check_mask = NULL;
1843                         fields[field_count].in_check_value = NULL;
1844                         fields[field_count].in_handler = field_le_to_host;
1845                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1846                 }
1847         }
1848
1849         jtag_add_dr_scan(num_fields, fields, -1, NULL);
1850         jtag_execute_queue();
1851
1852         for (i = 0; i < argc / 2; i++)
1853                 free(fields[i].out_value);
1854
1855         free(fields);
1856
1857         return ERROR_OK;
1858 }
1859
1860 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1861 {
1862         if (argc == 0)
1863         {
1864                 command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1865                 return ERROR_OK;
1866         }
1867
1868         if (strcmp(args[0], "enable") == 0)
1869         {
1870                 jtag_verify_capture_ir = 1;
1871         }
1872         else if (strcmp(args[0], "disable") == 0)
1873         {
1874                 jtag_verify_capture_ir = 0;
1875         }
1876
1877         return ERROR_OK;
1878 }