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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 jtag_interface_t *jtag_interfaces[] = {
 166 #if BUILD_PARPORT == 1
 167         &parport_interface,
 168 #endif
 169 #if BUILD_FT2232_FTD2XX == 1
 170         &ft2232_interface,
 171 #endif
 172 #if BUILD_FT2232_LIBFTDI == 1
 173         &ft2232_interface,
 174 #endif
 175 #if BUILD_AMTJTAGACCEL == 1
 176         &amt_jtagaccel_interface,
 177 #endif
 178 #if BUILD_EP93XX == 1
 179         &ep93xx_interface,
 180 #endif
 181 #if BUILD_AT91RM9200 == 1
 182         &at91rm9200_interface,
 183 #endif
 184 #if BUILD_GW16012 == 1
 185         &gw16012_interface,
 186 #endif
 187         NULL,
 188 };
 189
 190 jtag_interface_t *jtag = NULL;
 191
 192 /* configuration */
 193 char* jtag_interface = NULL;
 194 int jtag_speed = -1;
 195
 196
 197 /* forward declarations */
 198 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 199 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 200 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 201 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state endstate, error_handler_t *error_handler);
 202 int jtag_add_statemove(enum tap_state endstate);
 203 int jtag_add_pathmove(int num_states, enum tap_state *path);
 204 int jtag_add_runtest(int num_cycles, enum tap_state endstate);
 205 int jtag_add_reset(int trst, int srst);
 206 int jtag_add_end_state(enum tap_state endstate);
 207 int jtag_add_sleep(u32 us);
 208 int jtag_execute_queue(void);
 209 int jtag_cancel_queue(void);
 210
 211 /* jtag commands */
 212 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 213 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 214 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 215 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 216 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 217 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 218
 219 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 220
 221 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 222 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 223 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 224 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 225 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 226 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 227
 228 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 229
 230 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 231 {
 232         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 233
 234         if (callback == NULL)
 235         {
 236                 return ERROR_INVALID_ARGUMENTS;
 237         }
 238
 239         if (*callbacks_p)
 240         {
 241                 while ((*callbacks_p)->next)
 242                         callbacks_p = &((*callbacks_p)->next);
 243                 callbacks_p = &((*callbacks_p)->next);
 244         }
 245
 246         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 247         (*callbacks_p)->callback = callback;
 248         (*callbacks_p)->priv = priv;
 249         (*callbacks_p)->next = NULL;
 250
 251         return ERROR_OK;
 252 }
 253
 254 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 255 {
 256         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 257
 258         if (callback == NULL)
 259         {
 260                 return ERROR_INVALID_ARGUMENTS;
 261         }
 262
 263         while (*callbacks_p)
 264         {
 265                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 266                 if ((*callbacks_p)->callback == callback)
 267                 {
 268                         free(*callbacks_p);
 269                         *callbacks_p = *next;
 270                 }
 271                 callbacks_p = next;
 272         }
 273
 274         return ERROR_OK;
 275 }
 276
 277 int jtag_call_event_callbacks(enum jtag_event event)
 278 {
 279         jtag_event_callback_t *callback = jtag_event_callbacks;
 280
 281         DEBUG("jtag event: %s", jtag_event_strings[event]);
 282
 283         while (callback)
 284         {
 285                 callback->callback(event, callback->priv);
 286                 callback = callback->next;
 287         }
 288
 289         return ERROR_OK;
 290 }
 291
 292 /* returns a pointer to the pointer of the last command in queue
 293  * this may be a pointer to the root pointer (jtag_command_queue)
 294  * or to the next member of the last but one command
 295  */
 296 jtag_command_t** jtag_get_last_command_p(void)
 297 {
 298 /*      jtag_command_t *cmd = jtag_command_queue;
 299
 300         if (cmd)
 301                 while (cmd->next)
 302                         cmd = cmd->next;
 303         else
 304                 return &jtag_command_queue;
 305
 306         return &cmd->next;*/
 307
 308         return last_comand_pointer;
 309 }
 310
 311 /* returns a pointer to the n-th device in the scan chain */
 312 jtag_device_t* jtag_get_device(int num)
 313 {
 314         jtag_device_t *device = jtag_devices;
 315         int i = 0;
 316
 317         while (device)
 318         {
 319                 if (num == i)
 320                         return device;
 321                 device = device->next;
 322                 i++;
 323         }
 324
 325         return NULL;
 326 }
 327
 328 void* cmd_queue_alloc(size_t size)
 329 {
 330         cmd_queue_page_t **p_page = &cmd_queue_pages;
 331         int offset;
 332
 333         if (*p_page)
 334         {
 335                 while ((*p_page)->next)
 336                         p_page = &((*p_page)->next);
 337                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 338                         p_page = &((*p_page)->next);
 339         }
 340
 341         if (!*p_page)
 342         {
 343                 *p_page = malloc(sizeof(cmd_queue_page_t));
 344                 (*p_page)->used = 0;
 345                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 346                 (*p_page)->next = NULL;
 347         }
 348
 349         offset = (*p_page)->used;
 350         (*p_page)->used += size;
 351
 352         return ((*p_page)->address) + offset;
 353 }
 354
 355 void cmd_queue_free()
 356 {
 357         cmd_queue_page_t *page = cmd_queue_pages;
 358
 359         while (page)
 360         {
 361                 cmd_queue_page_t *last = page;
 362                 free(page->address);
 363                 page = page->next;
 364                 free(last);
 365         }
 366
 367         cmd_queue_pages = NULL;
 368 }
 369
 370 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 371 {
 372         jtag_command_t **last_cmd;
 373         jtag_device_t *device;
 374         int i, j;
 375         int scan_size = 0;
 376
 377         if (jtag_trst == 1)
 378         {
 379                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 380                 return ERROR_JTAG_TRST_ASSERTED;
 381         }
 382
 383         last_cmd = jtag_get_last_command_p();
 384
 385         /* allocate memory for a new list member */
 386         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 387         (*last_cmd)->next = NULL;
 388         last_comand_pointer = &((*last_cmd)->next);
 389         (*last_cmd)->type = JTAG_SCAN;
 390
 391         /* allocate memory for ir scan command */
 392         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 393         (*last_cmd)->cmd.scan->ir_scan = 1;
 394         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 395         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 396         (*last_cmd)->cmd.scan->end_state = state;
 397         if (error_handler)
 398         {
 399                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 400                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 401         }
 402         else
 403         {
 404                 (*last_cmd)->cmd.scan->error_handler = NULL;
 405         }
 406
 407         if (state != -1)
 408                 cmd_queue_end_state = state;
 409
 410         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 411                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 412
 413         if (cmd_queue_end_state == TAP_TLR)
 414                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 415
 416         cmd_queue_cur_state = cmd_queue_end_state;
 417
 418         for (i=0; i < jtag_num_devices; i++)
 419         {
 420                 int found = 0;
 421                 device = jtag_get_device(i);
 422                 scan_size = device->ir_length;
 423                 (*last_cmd)->cmd.scan->fields[i].device = i;
 424                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 425                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 426                 if (jtag_verify_capture_ir)
 427                 {
 428                         (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(device->expected, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 429                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(device->expected_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 430                 }
 431                 else
 432                 {
 433                         (*last_cmd)->cmd.scan->fields[i].in_check_value = NULL;
 434                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = NULL;
 435                 }
 436                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 437                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 438
 439                 /* search the list */
 440                 for (j=0; j < num_fields; j++)
 441                 {
 442                         if (i == fields[j].device)
 443                         {
 444                                 found = 1;
 445                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 446                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 447
 448                                 device->bypass = 0;
 449                                 break;
 450                         }
 451                 }
 452
 453                 if (!found)
 454                 {
 455                         /* if a device isn't listed, set it to BYPASS */
 456                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 457                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 458                         device->bypass = 1;
 459
 460                 }
 461
 462                 /* update device information */
 463                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 464         }
 465
 466         return ERROR_OK;
 467 }
 468
 469 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 470 {
 471         jtag_command_t **last_cmd;
 472         int i;
 473
 474         if (jtag_trst == 1)
 475         {
 476                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 477                 return ERROR_JTAG_TRST_ASSERTED;
 478         }
 479
 480         last_cmd = jtag_get_last_command_p();
 481
 482         /* allocate memory for a new list member */
 483         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 484         (*last_cmd)->next = NULL;
 485         last_comand_pointer = &((*last_cmd)->next);
 486         (*last_cmd)->type = JTAG_SCAN;
 487
 488         /* allocate memory for ir scan command */
 489         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 490         (*last_cmd)->cmd.scan->ir_scan = 1;
 491         (*last_cmd)->cmd.scan->num_fields = num_fields;
 492         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 493         (*last_cmd)->cmd.scan->end_state = state;
 494         if (error_handler)
 495         {
 496                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 497                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 498         }
 499         else
 500         {
 501                 (*last_cmd)->cmd.scan->error_handler = NULL;
 502         }
 503
 504         if (state != -1)
 505                 cmd_queue_end_state = state;
 506
 507         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 508                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 509
 510         if (cmd_queue_end_state == TAP_TLR)
 511                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 512
 513         cmd_queue_cur_state = cmd_queue_end_state;
 514
 515         for (i = 0; i < num_fields; i++)
 516         {
 517                 int num_bits = fields[i].num_bits;
 518                 int num_bytes = CEIL(fields[i].num_bits, 8);
 519                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 520                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 521                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 522                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 523                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 524                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 525                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 526                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 527                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 528         }
 529         return ERROR_OK;
 530 }
 531
 532 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 533 {
 534         int i, j;
 535         int bypass_devices = 0;
 536         int field_count = 0;
 537         jtag_command_t **last_cmd = jtag_get_last_command_p();
 538         jtag_device_t *device = jtag_devices;
 539         int scan_size;
 540
 541         if (jtag_trst == 1)
 542         {
 543                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 544                 return ERROR_JTAG_TRST_ASSERTED;
 545         }
 546
 547         /* count devices in bypass */
 548         while (device)
 549         {
 550                 if (device->bypass)
 551                         bypass_devices++;
 552                 device = device->next;
 553         }
 554
 555         /* allocate memory for a new list member */
 556         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 557         last_comand_pointer = &((*last_cmd)->next);
 558         (*last_cmd)->next = NULL;
 559         (*last_cmd)->type = JTAG_SCAN;
 560
 561         /* allocate memory for dr scan command */
 562         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 563         (*last_cmd)->cmd.scan->ir_scan = 0;
 564         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 565         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 566         (*last_cmd)->cmd.scan->end_state = state;
 567         if (error_handler)
 568         {
 569                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 570                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 571         }
 572         else
 573         {
 574                 (*last_cmd)->cmd.scan->error_handler = NULL;
 575         }
 576
 577         if (state != -1)
 578                 cmd_queue_end_state = state;
 579
 580         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 581                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 582
 583         if (cmd_queue_end_state == TAP_TLR)
 584                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 585
 586         cmd_queue_cur_state = cmd_queue_end_state;
 587
 588         for (i=0; i < jtag_num_devices; i++)
 589         {
 590                 int found = 0;
 591                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 592
 593                 for (j=0; j < num_fields; j++)
 594                 {
 595                         if (i == fields[j].device)
 596                         {
 597                                 found = 1;
 598                                 scan_size = fields[j].num_bits;
 599                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 600                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 601                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 602                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 603                                 (*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);
 604                                 (*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);
 605                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 606                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 607                         }
 608                 }
 609                 if (!found)
 610                 {
 611                         /* if a device isn't listed, the BYPASS register should be selected */
 612                         if (!jtag_get_device(i)->bypass)
 613                         {
 614                                 ERROR("BUG: no scan data for a device not in BYPASS");
 615                                 exit(-1);
 616                         }
 617
 618                         /* program the scan field to 1 bit length, and ignore it's value */
 619                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 620                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 621                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 622                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 623                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 624                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 625                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 626                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 627                 }
 628                 else
 629                 {
 630                         /* if a device is listed, the BYPASS register must not be selected */
 631                         if (jtag_get_device(i)->bypass)
 632                         {
 633                                 WARNING("scan data for a device in BYPASS");
 634                         }
 635                 }
 636         }
 637         return ERROR_OK;
 638 }
 639
 640 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state, error_handler_t *error_handler)
 641 {
 642         int i;
 643         jtag_command_t **last_cmd = jtag_get_last_command_p();
 644
 645         if (jtag_trst == 1)
 646         {
 647                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 648                 return ERROR_JTAG_TRST_ASSERTED;
 649         }
 650
 651         /* allocate memory for a new list member */
 652         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 653         last_comand_pointer = &((*last_cmd)->next);
 654         (*last_cmd)->next = NULL;
 655         (*last_cmd)->type = JTAG_SCAN;
 656
 657         /* allocate memory for scan command */
 658         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 659         (*last_cmd)->cmd.scan->ir_scan = 0;
 660         (*last_cmd)->cmd.scan->num_fields = num_fields;
 661         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 662         (*last_cmd)->cmd.scan->end_state = state;
 663         if (error_handler)
 664         {
 665                 (*last_cmd)->cmd.scan->error_handler = cmd_queue_alloc(sizeof(error_handler_t));
 666                 *(*last_cmd)->cmd.scan->error_handler = *error_handler;
 667         }
 668         else
 669         {
 670                 (*last_cmd)->cmd.scan->error_handler = NULL;
 671         }
 672
 673         if (state != -1)
 674                 cmd_queue_end_state = state;
 675
 676         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 677                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 678
 679         if (cmd_queue_end_state == TAP_TLR)
 680                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 681
 682         cmd_queue_cur_state = cmd_queue_end_state;
 683
 684         for (i = 0; i < num_fields; i++)
 685         {
 686                 int num_bits = fields[i].num_bits;
 687                 int num_bytes = CEIL(fields[i].num_bits, 8);
 688                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 689                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 690                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 691                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 692                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 693                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 694                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 695                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 696                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 697         }
 698
 699         return ERROR_OK;
 700 }
 701 int jtag_add_statemove(enum tap_state state)
 702 {
 703         jtag_command_t **last_cmd = jtag_get_last_command_p();
 704
 705         if (jtag_trst == 1)
 706         {
 707                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 708                 return ERROR_JTAG_TRST_ASSERTED;
 709         }
 710
 711         /* allocate memory for a new list member */
 712         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 713         last_comand_pointer = &((*last_cmd)->next);
 714         (*last_cmd)->next = NULL;
 715         (*last_cmd)->type = JTAG_STATEMOVE;
 716
 717         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 718         (*last_cmd)->cmd.statemove->end_state = state;
 719
 720         if (state != -1)
 721                 cmd_queue_end_state = state;
 722
 723         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 724                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 725
 726         if (cmd_queue_end_state == TAP_TLR)
 727                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 728
 729         cmd_queue_cur_state = cmd_queue_end_state;
 730
 731         return ERROR_OK;
 732 }
 733
 734 int jtag_add_pathmove(int num_states, enum tap_state *path)
 735 {
 736         jtag_command_t **last_cmd = jtag_get_last_command_p();
 737         int i;
 738
 739         if (jtag_trst == 1)
 740         {
 741                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 742                 return ERROR_JTAG_TRST_ASSERTED;
 743         }
 744
 745         /* the last state has to be a stable state */
 746         if (tap_move_map[path[num_states - 1]] == -1)
 747         {
 748                 ERROR("TAP path doesn't finish in a stable state");
 749                 return ERROR_JTAG_NOT_IMPLEMENTED;
 750         }
 751
 752         if (jtag->support_pathmove)
 753         {
 754                 /* allocate memory for a new list member */
 755                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 756                 last_comand_pointer = &((*last_cmd)->next);
 757                 (*last_cmd)->next = NULL;
 758                 (*last_cmd)->type = JTAG_PATHMOVE;
 759
 760                 (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 761                 (*last_cmd)->cmd.pathmove->num_states = num_states;
 762                 (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 763
 764                 for (i = 0; i < num_states; i++)
 765                         (*last_cmd)->cmd.pathmove->path[i] = path[i];
 766         }
 767         else
 768         {
 769                 /* validate the desired path, and see if it fits a default path */
 770                 int begin = 0;
 771                 int end = 0;
 772                 int j;
 773
 774                 for (i = 0; i < num_states; i++)
 775                 {
 776                         for (j = i; j < num_states; j++)
 777                         {
 778                                 if (tap_move_map[path[j]] != -1)
 779                                 {
 780                                         end = j;
 781                                         break;
 782                                 }
 783                         }
 784
 785                         if (begin - end <= 7)   /* a default path spans no more than 7 states */
 786                         {
 787                                 jtag_add_statemove(path[end]);
 788                         }
 789                         else
 790                         {
 791                                 ERROR("encountered a TAP path that can't be fulfilled by default paths");
 792                                 return ERROR_JTAG_NOT_IMPLEMENTED;
 793                         }
 794
 795                         i = end;
 796                 }
 797         }
 798
 799         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 800                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 801
 802         if (cmd_queue_end_state == TAP_TLR)
 803                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 804
 805         cmd_queue_cur_state = path[num_states - 1];
 806
 807         return ERROR_OK;
 808 }
 809
 810 int jtag_add_runtest(int num_cycles, enum tap_state state)
 811 {
 812         jtag_command_t **last_cmd = jtag_get_last_command_p();
 813
 814         if (jtag_trst == 1)
 815         {
 816                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 817                 return ERROR_JTAG_TRST_ASSERTED;
 818         }
 819
 820         /* allocate memory for a new list member */
 821         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 822         (*last_cmd)->next = NULL;
 823         last_comand_pointer = &((*last_cmd)->next);
 824         (*last_cmd)->type = JTAG_RUNTEST;
 825
 826         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 827         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 828         (*last_cmd)->cmd.runtest->end_state = state;
 829
 830         if (state != -1)
 831                 cmd_queue_end_state = state;
 832
 833         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 834                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 835
 836         if (cmd_queue_end_state == TAP_TLR)
 837                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 838
 839         cmd_queue_cur_state = cmd_queue_end_state;
 840
 841         return ERROR_OK;
 842 }
 843
 844 int jtag_add_reset(int req_trst, int req_srst)
 845 {
 846         int trst_with_tms = 0;
 847
 848         jtag_command_t **last_cmd = jtag_get_last_command_p();
 849
 850         if (req_trst == -1)
 851                 req_trst = jtag_trst;
 852
 853         if (req_srst == -1)
 854                 req_srst = jtag_srst;
 855
 856         /* Make sure that jtag_reset_config allows the requested reset */
 857         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 858         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 859                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 860
 861         /* if TRST pulls SRST, we reset with TAP T-L-R */
 862         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 863         {
 864                 req_trst = 0;
 865                 trst_with_tms = 1;
 866         }
 867
 868         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 869         {
 870                 ERROR("requested nSRST assertion, but the current configuration doesn't support this");
 871                 return ERROR_JTAG_RESET_CANT_SRST;
 872         }
 873
 874         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 875         {
 876                 req_trst = 0;
 877                 trst_with_tms = 1;
 878         }
 879
 880         /* allocate memory for a new list member */
 881         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 882         (*last_cmd)->next = NULL;
 883         last_comand_pointer = &((*last_cmd)->next);
 884         (*last_cmd)->type = JTAG_RESET;
 885
 886         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 887         (*last_cmd)->cmd.reset->trst = req_trst;
 888         (*last_cmd)->cmd.reset->srst = req_srst;
 889
 890         jtag_trst = req_trst;
 891         jtag_srst = req_srst;
 892
 893         if (jtag_srst)
 894         {
 895                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 896         }
 897         else
 898         {
 899                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 900                 if (jtag_nsrst_delay)
 901                         jtag_add_sleep(jtag_nsrst_delay * 1000);
 902         }
 903
 904         if (trst_with_tms)
 905         {
 906                 last_cmd = &((*last_cmd)->next);
 907
 908                 /* allocate memory for a new list member */
 909                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 910                 (*last_cmd)->next = NULL;
 911                 last_comand_pointer = &((*last_cmd)->next);
 912                 (*last_cmd)->type = JTAG_STATEMOVE;
 913
 914                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 915                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 916
 917                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 918                 cmd_queue_cur_state = TAP_TLR;
 919                 cmd_queue_end_state = TAP_TLR;
 920
 921                 return ERROR_OK;
 922         }
 923         else
 924         {
 925                 if (jtag_trst)
 926                 {
 927                         /* we just asserted nTRST, so we're now in Test-Logic-Reset,
 928                          * and inform possible listeners about this
 929                          */
 930                         cmd_queue_cur_state = TAP_TLR;
 931                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 932                 }
 933                 else
 934                 {
 935                         /* the nTRST line got deasserted, so we're still in Test-Logic-Reset,
 936                          * but we might want to add a delay to give the TAP time to settle
 937                          */
 938                         if (jtag_ntrst_delay)
 939                                 jtag_add_sleep(jtag_ntrst_delay * 1000);
 940                 }
 941         }
 942
 943         return ERROR_OK;
 944 }
 945
 946 int jtag_add_end_state(enum tap_state state)
 947 {
 948         jtag_command_t **last_cmd = jtag_get_last_command_p();
 949
 950         /* allocate memory for a new list member */
 951         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 952         (*last_cmd)->next = NULL;
 953         last_comand_pointer = &((*last_cmd)->next);
 954         (*last_cmd)->type = JTAG_END_STATE;
 955
 956         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 957         (*last_cmd)->cmd.end_state->end_state = state;
 958
 959         if (state != -1)
 960                 cmd_queue_end_state = state;
 961
 962         return ERROR_OK;
 963 }
 964
 965 int jtag_add_sleep(u32 us)
 966 {
 967         jtag_command_t **last_cmd = jtag_get_last_command_p();
 968
 969         /* allocate memory for a new list member */
 970         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 971         (*last_cmd)->next = NULL;
 972         last_comand_pointer = &((*last_cmd)->next);
 973         (*last_cmd)->type = JTAG_SLEEP;
 974
 975         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 976         (*last_cmd)->cmd.sleep->us = us;
 977
 978         return ERROR_OK;
 979 }
 980
 981 int jtag_scan_size(scan_command_t *cmd)
 982 {
 983         int bit_count = 0;
 984         int i;
 985
 986         /* count bits in scan command */
 987         for (i=0; i<cmd->num_fields; i++)
 988         {
 989                 bit_count += cmd->fields[i].num_bits;
 990         }
 991
 992         return bit_count;
 993 }
 994
 995 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 996 {
 997         int bit_count = 0;
 998         int i;
 999
1000         bit_count = jtag_scan_size(cmd);
1001         *buffer = malloc(CEIL(bit_count, 8));
1002
1003         bit_count = 0;
1004
1005         for (i = 0; i < cmd->num_fields; i++)
1006         {
1007                 if (cmd->fields[i].out_value)
1008                 {
1009 #ifdef _DEBUG_JTAG_IO_
1010                         char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > 64) ? 64 : cmd->fields[i].num_bits, 16);
1011 #endif
1012                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
1013 #ifdef _DEBUG_JTAG_IO_
1014                         DEBUG("fields[%i].out_value: 0x%s", i, char_buf);
1015                         free(char_buf);
1016 #endif
1017                 }
1018
1019                 bit_count += cmd->fields[i].num_bits;
1020         }
1021
1022         return bit_count;
1023
1024 }
1025
1026 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
1027 {
1028         int i;
1029         int bit_count = 0;
1030         int retval;
1031
1032         /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
1033         retval = ERROR_OK;
1034
1035         for (i=0; i < cmd->num_fields; i++)
1036         {
1037                 /* if neither in_value, in_check_value nor in_handler
1038                  * are specified we don't have to examine this field
1039                  */
1040                 if (cmd->fields[i].in_value || cmd->fields[i].in_check_value || cmd->fields[i].in_handler)
1041                 {
1042                         int num_bits = cmd->fields[i].num_bits;
1043                         u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
1044
1045                         #ifdef _DEBUG_JTAG_IO_
1046                                 char *char_buf;
1047
1048                                 char_buf = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1049                                 DEBUG("fields[%i].in_value: 0x%s", i, char_buf);
1050                                 free(char_buf);
1051                         #endif
1052
1053                         if (cmd->fields[i].in_value)
1054                         {
1055                                 buf_cpy(captured, cmd->fields[i].in_value, num_bits);
1056
1057                                 if (cmd->fields[i].in_handler)
1058                                 {
1059                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv) != ERROR_OK)
1060                                         {
1061                                                 WARNING("in_handler reported a failed check");
1062                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1063                                         }
1064                                 }
1065                         }
1066
1067                         /* no in_value specified, but a handler takes care of the scanned data */
1068                         if (cmd->fields[i].in_handler && (!cmd->fields[i].in_value))
1069                         {
1070                                 if (cmd->fields[i].in_handler(captured, cmd->fields[i].in_handler_priv) != ERROR_OK)
1071                                 {
1072                                         /* We're going to call the error:handler later, but if the in_handler
1073                                          * reported an error we report this failure upstream
1074                                          */
1075                                         WARNING("in_handler reported a failed check");
1076                                         retval = ERROR_JTAG_QUEUE_FAILED;
1077                                 }
1078                         }
1079
1080                         if (cmd->fields[i].in_check_value)
1081                         {
1082                                 int compare_failed = 0;
1083
1084                                 if (cmd->fields[i].in_check_mask)
1085                                         compare_failed = buf_cmp_mask(captured, cmd->fields[i].in_check_value, cmd->fields[i].in_check_mask, num_bits);
1086                                 else
1087                                         compare_failed = buf_cmp(captured, cmd->fields[i].in_check_value, num_bits);
1088
1089                                 if (compare_failed)
1090                                 {
1091                                         if (cmd->error_handler)
1092                                         {
1093                                                 /* ask the error handler if once has been specified if this is a real problem */
1094                                                 if (cmd->error_handler->error_handler(captured, cmd->error_handler->error_handler_priv) != ERROR_OK)
1095                                                         retval = ERROR_JTAG_QUEUE_FAILED;
1096                                                 else
1097                                                         compare_failed = 0;
1098                                         }
1099                                         else
1100                                         {
1101                                                 /* if there wasn't a handler specified, we report a failure */
1102                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1103                                         }
1104
1105                                         /* An error handler could have caught the failing check
1106                                          * only report a problem when there wasn't a handler, or if the handler
1107                                          * acknowledged the error
1108                                          */
1109                                         if (compare_failed)
1110                                         {
1111                                                 char *captured_char = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1112                                                 char *in_check_value_char = buf_to_str(cmd->fields[i].in_check_value, (num_bits > 64) ? 64 : num_bits, 16);
1113
1114                                                 if (cmd->fields[i].in_check_mask)
1115                                                 {
1116                                                         char *in_check_mask_char;
1117                                                         in_check_mask_char = buf_to_str(cmd->fields[i].in_check_mask, (num_bits > 64) ? 64 : num_bits, 16);
1118                                                         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);
1119                                                         free(in_check_mask_char);
1120                                                 }
1121                                                 else
1122                                                 {
1123                                                         WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
1124                                                 }
1125
1126                                                 free(captured_char);
1127                                                 free(in_check_value_char);
1128                                         }
1129
1130                                 }
1131                         }
1132                         free(captured);
1133                 }
1134                 bit_count += cmd->fields[i].num_bits;
1135         }
1136
1137         return retval;
1138 }
1139
1140 enum scan_type jtag_scan_type(scan_command_t *cmd)
1141 {
1142         int i;
1143         int type = 0;
1144
1145         for (i=0; i < cmd->num_fields; i++)
1146         {
1147                 if (cmd->fields[i].in_check_value || cmd->fields[i].in_value || cmd->fields[i].in_handler)
1148                         type |= SCAN_IN;
1149                 if (cmd->fields[i].out_value)
1150                         type |= SCAN_OUT;
1151         }
1152
1153         return type;
1154 }
1155
1156 int jtag_execute_queue(void)
1157 {
1158         int retval;
1159
1160         retval = jtag->execute_queue();
1161
1162         cmd_queue_free();
1163
1164         jtag_command_queue = NULL;
1165         last_comand_pointer = &jtag_command_queue;
1166
1167         return retval;
1168 }
1169
1170 int jtag_cancel_queue(void)
1171 {
1172         cmd_queue_free();
1173         jtag_command_queue = NULL;
1174         last_comand_pointer = &jtag_command_queue;
1175
1176         return ERROR_OK;
1177 }
1178
1179 int jtag_reset_callback(enum jtag_event event, void *priv)
1180 {
1181         jtag_device_t *device = priv;
1182
1183         DEBUG("-");
1184
1185         if (event == JTAG_TRST_ASSERTED)
1186         {
1187                 buf_set_ones(device->cur_instr, device->ir_length);
1188                 device->bypass = 1;
1189         }
1190
1191         return ERROR_OK;
1192 }
1193
1194 void jtag_sleep(u32 us)
1195 {
1196         usleep(us);
1197 }
1198
1199 /* Try to examine chain layout according to IEEE 1149.1 §12
1200  */
1201 int jtag_examine_chain()
1202 {
1203         jtag_device_t *device = jtag_devices;
1204         scan_field_t field;
1205         u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
1206         int i;
1207         int bit_count;
1208         int device_count = 0;
1209         u8 zero_check = 0x0;
1210         u8 one_check = 0xff;
1211
1212         field.device = 0;
1213         field.num_bits = sizeof(idcode_buffer) * 8;
1214         field.out_value = idcode_buffer;
1215         field.out_mask = NULL;
1216         field.in_value = idcode_buffer;
1217         field.in_check_value = NULL;
1218         field.in_check_mask = NULL;
1219         field.in_handler = NULL;
1220         field.in_handler_priv = NULL;
1221
1222         for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
1223         {
1224                 buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
1225         }
1226
1227         jtag_add_plain_dr_scan(1, &field, TAP_TLR, NULL);
1228         jtag_execute_queue();
1229
1230         for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++)
1231         {
1232                 zero_check |= idcode_buffer[i];
1233                 one_check &= idcode_buffer[i];
1234         }
1235
1236         /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */
1237         if ((zero_check == 0x00) || (one_check == 0xff))
1238         {
1239                 ERROR("JTAG communication failure, check connection, JTAG interface, target power etc.");
1240                 exit(-1);
1241         }
1242
1243         for (bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
1244         {
1245                 u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
1246                 if ((idcode & 1) == 0)
1247                 {
1248                         /* LSB must not be 0, this indicates a device in bypass */
1249                         device_count++;
1250
1251                         bit_count += 1;
1252                 }
1253                 else
1254                 {
1255                         u32 manufacturer;
1256                         u32 part;
1257                         u32 version;
1258
1259                         if (idcode == 0x000000FF)
1260                         {
1261                                 /* End of chain (invalid manufacturer ID) */
1262                                 break;
1263                         }
1264
1265                         if (device)
1266                         {
1267                                 device->idcode = idcode;
1268                                 device = device->next;
1269                         }
1270                         device_count++;
1271
1272                         manufacturer = (idcode & 0xffe) >> 1;
1273                         part = (idcode & 0xffff000) >> 12;
1274                         version = (idcode & 0xf0000000) >> 28;
1275
1276                         DEBUG("JTAG device found: 0x%8.8x (Manufacturer: 0x%3.3x, Part: 0x%4.4x, Version: 0x%1.1x",
1277                                 idcode, manufacturer, part, version);
1278
1279                         bit_count += 32;
1280                 }
1281         }
1282
1283         /* see if number of discovered devices matches configuration */
1284         if (device_count != jtag_num_devices)
1285         {
1286                 ERROR("number of discovered devices in JTAG chain (%i) doesn't match configuration (%i)",
1287                         device_count, jtag_num_devices);
1288                 ERROR("check the config file and ensure proper JTAG communication (connections, speed, ...)");
1289                 exit(-1);
1290         }
1291
1292         return ERROR_OK;
1293 }
1294
1295 int jtag_validate_chain()
1296 {
1297         jtag_device_t *device = jtag_devices;
1298         int total_ir_length = 0;
1299         u8 *ir_test = NULL;
1300         scan_field_t field;
1301         int chain_pos = 0;
1302
1303         while (device)
1304         {
1305                 total_ir_length += device->ir_length;
1306                 device = device->next;
1307         }
1308
1309         total_ir_length += 2;
1310         ir_test = malloc(CEIL(total_ir_length, 8));
1311         buf_set_ones(ir_test, total_ir_length);
1312
1313         field.device = 0;
1314         field.num_bits = total_ir_length;
1315         field.out_value = ir_test;
1316         field.out_mask = NULL;
1317         field.in_value = ir_test;
1318         field.in_check_value = NULL;
1319         field.in_check_mask = NULL;
1320         field.in_handler = NULL;
1321         field.in_handler_priv = NULL;
1322
1323         jtag_add_plain_ir_scan(1, &field, TAP_TLR, NULL);
1324         jtag_execute_queue();
1325
1326         device = jtag_devices;
1327         while (device)
1328         {
1329                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1330                 {
1331                         char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1332                         ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1333                         free(cbuf);
1334                         exit(-1);
1335                 }
1336                 chain_pos += device->ir_length;
1337                 device = device->next;
1338         }
1339
1340         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1341         {
1342                 char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1343                 ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1344                 free(cbuf);
1345                 exit(-1);
1346         }
1347
1348         free(ir_test);
1349
1350         return ERROR_OK;
1351 }
1352
1353 int jtag_register_commands(struct command_context_s *cmd_ctx)
1354 {
1355         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1356                 COMMAND_CONFIG, NULL);
1357         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1358                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1359         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1360                 COMMAND_CONFIG, NULL);
1361         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1362                 COMMAND_CONFIG, NULL);
1363         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
1364                 COMMAND_CONFIG, NULL);
1365         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
1366                 COMMAND_CONFIG, NULL);
1367
1368         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1369                 COMMAND_EXEC, "print current scan chain configuration");
1370
1371         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1372                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1373         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1374                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1375         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1376                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1377         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1378                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1379         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1380                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1381         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1382                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1383
1384         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1385                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1386         return ERROR_OK;
1387 }
1388
1389 int jtag_init(struct command_context_s *cmd_ctx)
1390 {
1391         int i;
1392
1393         DEBUG("-");
1394
1395         if (jtag_speed == -1)
1396                 jtag_speed = 0;
1397
1398         if (jtag_interface && (jtag_interface[0] != 0))
1399                 /* configuration var 'jtag_interface' is set, and not empty */
1400                 for (i = 0; jtag_interfaces[i]; i++)
1401                 {
1402                         if (strcmp(jtag_interface, jtag_interfaces[i]->name) == 0)
1403                         {
1404                                 jtag_device_t *device;
1405                                 device = jtag_devices;
1406
1407                                 if (jtag_interfaces[i]->init() != ERROR_OK)
1408                                         return ERROR_JTAG_INIT_FAILED;
1409                                 jtag = jtag_interfaces[i];
1410
1411                                 jtag_ir_scan_size = 0;
1412                                 jtag_num_devices = 0;
1413                                 while (device != NULL)
1414                                 {
1415                                         jtag_ir_scan_size += device->ir_length;
1416                                         jtag_num_devices++;
1417                                         device = device->next;
1418                                 }
1419
1420                                 jtag_add_statemove(TAP_TLR);
1421                                 jtag_execute_queue();
1422
1423                                 jtag_examine_chain();
1424
1425                                 jtag_validate_chain();
1426
1427                                 return ERROR_OK;
1428                         }
1429                 }
1430
1431         /* no valid interface was found (i.e. the configuration option,
1432          * didn't match one of the compiled-in interfaces
1433          */
1434         ERROR("No valid jtag interface found (%s)", jtag_interface);
1435         ERROR("compiled-in jtag interfaces:");
1436         for (i = 0; jtag_interfaces[i]; i++)
1437         {
1438                 ERROR("%i: %s", i, jtag_interfaces[i]->name);
1439         }
1440
1441         jtag = NULL;
1442         return ERROR_JTAG_INVALID_INTERFACE;
1443 }
1444
1445 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1446 {
1447         int i;
1448
1449         /* only if the configuration var isn't overwritten from cmdline */
1450         if (!jtag_interface)
1451         {
1452                 if (args[0] && (args[0][0] != 0))
1453                 {
1454                         for (i=0; jtag_interfaces[i]; i++)
1455                         {
1456                                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1457                                 {
1458                                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1459                                                 exit(-1);
1460
1461                                         jtag_interface = jtag_interfaces[i]->name;
1462
1463                                         return ERROR_OK;
1464                                 }
1465                         }
1466                 }
1467
1468                 /* remember the requested interface name, so we can complain about it later */
1469                 jtag_interface = strdup(args[0]);
1470                 DEBUG("'interface' command didn't specify a valid interface");
1471         }
1472
1473         return ERROR_OK;
1474 }
1475
1476 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1477 {
1478         jtag_device_t **last_device_p = &jtag_devices;
1479
1480         if (*last_device_p)
1481         {
1482                 while ((*last_device_p)->next)
1483                         last_device_p = &((*last_device_p)->next);
1484                 last_device_p = &((*last_device_p)->next);
1485         }
1486
1487         if (argc < 3)
1488                 return ERROR_OK;
1489
1490         *last_device_p = malloc(sizeof(jtag_device_t));
1491         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1492
1493         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1494         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1495         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1496         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1497
1498         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1499         (*last_device_p)->bypass = 1;
1500         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1501
1502         (*last_device_p)->next = NULL;
1503
1504         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1505
1506         jtag_num_devices++;
1507
1508         return ERROR_OK;
1509 }
1510
1511 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1512 {
1513         jtag_device_t *device = jtag_devices;
1514         int device_count = 0;
1515
1516         while (device)
1517         {
1518                 u32 expected, expected_mask, cur_instr;
1519                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1520                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1521                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1522                 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);
1523                 device = device->next;
1524                 device_count++;
1525         }
1526
1527         return ERROR_OK;
1528 }
1529
1530 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1531 {
1532         if (argc >= 1)
1533         {
1534                 if (strcmp(args[0], "none") == 0)
1535                         jtag_reset_config = RESET_NONE;
1536                 else if (strcmp(args[0], "trst_only") == 0)
1537                         jtag_reset_config = RESET_HAS_TRST;
1538                 else if (strcmp(args[0], "srst_only") == 0)
1539                         jtag_reset_config = RESET_HAS_SRST;
1540                 else if (strcmp(args[0], "trst_and_srst") == 0)
1541                         jtag_reset_config = RESET_TRST_AND_SRST;
1542                 else
1543                 {
1544                         ERROR("invalid reset_config argument");
1545                         exit(-1);
1546                 }
1547         }
1548
1549         if (argc >= 2)
1550         {
1551                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1552                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1553                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1554                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1555                 else if (strcmp(args[1], "combined") == 0)
1556                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1557                 else if (strcmp(args[1], "separate") == 0)
1558                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1559                 else
1560                 {
1561                         ERROR("invalid reset_config argument");
1562                         exit(-1);
1563                 }
1564         }
1565
1566         if (argc >= 3)
1567         {
1568                 if (strcmp(args[2], "trst_open_drain") == 0)
1569                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1570                 else if (strcmp(args[2], "trst_push_pull") == 0)
1571                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1572                 else
1573                 {
1574                         ERROR("invalid reset_config argument");
1575                         exit(-1);
1576                 }
1577         }
1578
1579         if (argc >= 4)
1580         {
1581                 if (strcmp(args[3], "srst_push_pull") == 0)
1582                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1583                 else if (strcmp(args[3], "srst_open_drain") == 0)
1584                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1585                 else
1586                 {
1587                         ERROR("invalid reset_config argument");
1588                         exit(-1);
1589                 }
1590         }
1591
1592         return ERROR_OK;
1593 }
1594
1595 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1596 {
1597         if (argc < 1)
1598         {
1599                 ERROR("jtag_nsrst_delay <ms> command takes one required argument");
1600                 exit(-1);
1601         }
1602         else
1603         {
1604                 jtag_nsrst_delay = strtoul(args[0], NULL, 0);
1605         }
1606
1607         return ERROR_OK;
1608 }
1609
1610 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1611 {
1612         if (argc < 1)
1613         {
1614                 ERROR("jtag_ntrst_delay <ms> command takes one required argument");
1615                 exit(-1);
1616         }
1617         else
1618         {
1619                 jtag_ntrst_delay = strtoul(args[0], NULL, 0);
1620         }
1621
1622         return ERROR_OK;
1623 }
1624
1625 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1626 {
1627         if (argc == 0)
1628                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1629
1630         if (argc > 0)
1631         {
1632                 /* this command can be called during CONFIG,
1633                  * in which case jtag isn't initialized */
1634                 if (jtag)
1635                         jtag->speed(strtoul(args[0], NULL, 0));
1636                 else
1637                         jtag_speed = strtoul(args[0], NULL, 0);
1638         }
1639
1640         return ERROR_OK;
1641 }
1642
1643 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1644 {
1645         enum tap_state state;
1646
1647         if (argc < 1)
1648         {
1649                 command_print(cmd_ctx, "usage: endstate <tap_state>");
1650         }
1651         else
1652         {
1653                 for (state = 0; state < 16; state++)
1654                 {
1655                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1656                         {
1657                                 jtag_add_end_state(state);
1658                                 jtag_execute_queue();
1659                         }
1660                 }
1661         }
1662         command_print(cmd_ctx, "current endstate: %s", tap_state_strings[end_state]);
1663
1664         return ERROR_OK;
1665 }
1666
1667 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1668 {
1669         int trst = -1;
1670         int srst = -1;
1671         char *usage = "usage: jtag_reset <trst> <srst>";
1672         int retval;
1673
1674         if (argc < 1)
1675         {
1676                 command_print(cmd_ctx, usage);
1677                 return ERROR_OK;
1678         }
1679
1680         if (args[0][0] == '1')
1681                 trst = 1;
1682         else if (args[0][0] == '0')
1683                 trst = 0;
1684         else
1685         {
1686                 command_print(cmd_ctx, usage);
1687                 return ERROR_OK;
1688         }
1689
1690         if (args[1][0] == '1')
1691                 srst = 1;
1692         else if (args[1][0] == '0')
1693                 srst = 0;
1694         else
1695         {
1696                 command_print(cmd_ctx, usage);
1697                 return ERROR_OK;
1698         }
1699
1700         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1701         {
1702                 switch (retval)
1703                 {
1704                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1705                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1706                                 break;
1707                         case ERROR_JTAG_RESET_CANT_SRST:
1708                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1709                                 break;
1710                         default:
1711                                 command_print(cmd_ctx, "unknown error");
1712                 }
1713         }
1714         jtag_execute_queue();
1715
1716         return ERROR_OK;
1717 }
1718
1719 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1720 {
1721         if (argc < 1)
1722         {
1723                 command_print(cmd_ctx, "usage: runtest <num_cycles>");
1724                 return ERROR_OK;
1725         }
1726
1727         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1728         jtag_execute_queue();
1729
1730         return ERROR_OK;
1731
1732 }
1733
1734 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1735 {
1736         enum tap_state state;
1737
1738         state = -1;
1739         if (argc == 1)
1740         {
1741                 for (state = 0; state < 16; state++)
1742                 {
1743                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1744                         {
1745                                 break;
1746                         }
1747                 }
1748         }
1749
1750         jtag_add_statemove(state);
1751         jtag_execute_queue();
1752
1753         return ERROR_OK;
1754
1755 }
1756
1757 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1758 {
1759         int i;
1760         scan_field_t *fields;
1761
1762         if ((argc < 2) || (argc % 2))
1763         {
1764                 command_print(cmd_ctx, "usage: irscan <device> <instr> [dev2] [instr2] ...");
1765                 return ERROR_OK;
1766         }
1767
1768         fields = malloc(sizeof(scan_field_t) * argc / 2);
1769
1770         for (i = 0; i < argc / 2; i++)
1771         {
1772                 int device = strtoul(args[i*2], NULL, 0);
1773                 int field_size = jtag_get_device(device)->ir_length;
1774                 fields[i].device = device;
1775                 fields[i].out_value = malloc(CEIL(field_size, 8));
1776                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1777                 fields[i].out_mask = NULL;
1778                 fields[i].in_value = NULL;
1779                 fields[i].in_check_mask = NULL;
1780                 fields[i].in_handler = NULL;
1781                 fields[i].in_handler_priv = NULL;
1782         }
1783
1784         jtag_add_ir_scan(argc / 2, fields, -1, NULL);
1785         jtag_execute_queue();
1786
1787         for (i = 0; i < argc / 2; i++)
1788                 free(fields[i].out_value);
1789
1790         free (fields);
1791
1792         return ERROR_OK;
1793 }
1794
1795 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1796 {
1797         scan_field_t *fields;
1798         int num_fields = 0;
1799         int field_count = 0;
1800         var_t *var;
1801         int i, j;
1802
1803         if ((argc < 2) || (argc % 2))
1804         {
1805                 command_print(cmd_ctx, "usage: drscan <device> <var> [dev2] [var2]");
1806                 return ERROR_OK;
1807         }
1808
1809         for (i = 0; i < argc; i+=2)
1810         {
1811                 var = get_var_by_namenum(args[i+1]);
1812                 if (var)
1813                 {
1814                         num_fields += var->num_fields;
1815                 }
1816                 else
1817                 {
1818                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1819                         return ERROR_OK;
1820                 }
1821         }
1822
1823         fields = malloc(sizeof(scan_field_t) * num_fields);
1824
1825         for (i = 0; i < argc; i+=2)
1826         {
1827                 var = get_var_by_namenum(args[i+1]);
1828
1829                 for (j = 0; j < var->num_fields; j++)
1830                 {
1831                         fields[field_count].device = strtol(args[i], NULL, 0);
1832                         fields[field_count].num_bits = var->fields[j].num_bits;
1833                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1834                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1835                         fields[field_count].out_mask = NULL;
1836                         fields[field_count].in_value = fields[field_count].out_value;
1837                         fields[field_count].in_check_mask = NULL;
1838                         fields[field_count].in_check_value = NULL;
1839                         fields[field_count].in_handler = field_le_to_host;
1840                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1841                 }
1842         }
1843
1844         jtag_add_dr_scan(num_fields, fields, -1, NULL);
1845         jtag_execute_queue();
1846
1847         for (i = 0; i < argc / 2; i++)
1848                 free(fields[i].out_value);
1849
1850         free(fields);
1851
1852         return ERROR_OK;
1853 }
1854
1855 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1856 {
1857         if (argc == 0)
1858         {
1859                 command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1860                 return ERROR_OK;
1861         }
1862
1863         if (strcmp(args[0], "enable") == 0)
1864         {
1865                 jtag_verify_capture_ir = 1;
1866         }
1867         else if (strcmp(args[0], "disable") == 0)
1868         {
1869                 jtag_verify_capture_ir = 0;
1870         }
1871
1872         return ERROR_OK;
1873 }