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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 #ifndef MINIDRIVER
  37 /* this allows JTAG devices to implement the entire jtag_xxx() layer in hw/sw */
  38 #define MINIDRIVER(a) a
  39 #endif
  40
  41
  42 /* note that this is not marked as static as it must be available from outside jtag.c for those
  43    that implement the jtag_xxx() minidriver layer
  44 */
  45 int jtag_error=ERROR_OK;
  46
  47
  48 char* tap_state_strings[16] =
  49 {
  50         "tlr",
  51         "sds", "cd", "sd", "e1d", "pd", "e2d", "ud",
  52         "rti",
  53         "sis", "ci", "si", "e1i", "pi", "e2i", "ui"
  54 };
  55
  56 typedef struct cmd_queue_page_s
  57 {
  58         void *address;
  59         size_t used;
  60         struct cmd_queue_page_s *next;
  61 } cmd_queue_page_t;
  62
  63 #define CMD_QUEUE_PAGE_SIZE (1024 * 1024)
  64 static cmd_queue_page_t *cmd_queue_pages = NULL;
  65
  66 /* tap_move[i][j]: tap movement command to go from state i to state j
  67  * 0: Test-Logic-Reset
  68  * 1: Run-Test/Idle
  69  * 2: Shift-DR
  70  * 3: Pause-DR
  71  * 4: Shift-IR
  72  * 5: Pause-IR
  73  *
  74  * SD->SD and SI->SI have to be caught in interface specific code
  75  */
  76 u8 tap_move[6][6] =
  77 {
  78 /*        TLR   RTI   SD    PD    SI    PI             */
  79         {0x7f, 0x00, 0x17, 0x0a, 0x1b, 0x16},   /* TLR */
  80         {0x7f, 0x00, 0x25, 0x05, 0x2b, 0x0b},   /* RTI */
  81         {0x7f, 0x31, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
  82         {0x7f, 0x30, 0x20, 0x17, 0x1e, 0x2f},   /* PD  */
  83         {0x7f, 0x31, 0x07, 0x17, 0x00, 0x01},   /* SI  */
  84         {0x7f, 0x30, 0x1c, 0x17, 0x20, 0x2f}    /* PI  */
  85 };
  86
  87 int tap_move_map[16] = {
  88         0, -1, -1,  2, -1,  3, -1, -1,
  89         1, -1, -1,  4, -1,  5, -1, -1
  90 };
  91
  92 tap_transition_t tap_transitions[16] =
  93 {
  94         {TAP_TLR, TAP_RTI},             /* TLR */
  95         {TAP_SIS, TAP_CD},              /* SDS */
  96         {TAP_E1D, TAP_SD},              /* CD  */
  97         {TAP_E1D, TAP_SD},              /* SD  */
  98         {TAP_UD,  TAP_PD},              /* E1D */
  99         {TAP_E2D, TAP_PD},              /* PD  */
 100         {TAP_UD,  TAP_SD},              /* E2D */
 101         {TAP_SDS, TAP_RTI},             /* UD  */
 102         {TAP_SDS, TAP_RTI},             /* RTI */
 103         {TAP_TLR, TAP_CI},              /* SIS */
 104         {TAP_E1I, TAP_SI},              /* CI  */
 105         {TAP_E1I, TAP_SI},              /* SI  */
 106         {TAP_UI,  TAP_PI},              /* E1I */
 107         {TAP_E2I, TAP_PI},              /* PI  */
 108         {TAP_UI,  TAP_SI},              /* E2I */
 109         {TAP_SDS, TAP_RTI}              /* UI  */
 110 };
 111
 112 char* jtag_event_strings[] =
 113 {
 114         "SRST asserted",
 115         "TRST asserted",
 116         "SRST released",
 117         "TRST released"
 118 };
 119
 120 enum tap_state end_state = TAP_TLR;
 121 enum tap_state cur_state = TAP_TLR;
 122 int jtag_trst = 0;
 123 int jtag_srst = 0;
 124
 125 jtag_command_t *jtag_command_queue = NULL;
 126 jtag_command_t **last_comand_pointer = &jtag_command_queue;
 127 jtag_device_t *jtag_devices = NULL;
 128 int jtag_num_devices = 0;
 129 int jtag_ir_scan_size = 0;
 130 enum reset_types jtag_reset_config = RESET_NONE;
 131 enum tap_state cmd_queue_end_state = TAP_TLR;
 132 enum tap_state cmd_queue_cur_state = TAP_TLR;
 133
 134 int jtag_verify_capture_ir = 1;
 135
 136 /* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
 137 int jtag_nsrst_delay = 0; /* default to no nSRST delay */
 138 int jtag_ntrst_delay = 0; /* default to no nTRST delay */
 139
 140 /* maximum number of JTAG devices expected in the chain
 141  */
 142 #define JTAG_MAX_CHAIN_SIZE 20
 143
 144 /* callbacks to inform high-level handlers about JTAG state changes */
 145 jtag_event_callback_t *jtag_event_callbacks;
 146
 147 /* jtag interfaces (parport, FTDI-USB, TI-USB, ...)
 148  */
 149 #if BUILD_PARPORT == 1
 150         extern jtag_interface_t parport_interface;
 151 #endif
 152
 153 #if BUILD_FT2232_FTD2XX == 1
 154         extern jtag_interface_t ft2232_interface;
 155 #endif
 156
 157 #if BUILD_FT2232_LIBFTDI == 1
 158         extern jtag_interface_t ft2232_interface;
 159 #endif
 160
 161 #if BUILD_AMTJTAGACCEL == 1
 162         extern jtag_interface_t amt_jtagaccel_interface;
 163 #endif
 164
 165 #if BUILD_EP93XX == 1
 166         extern jtag_interface_t ep93xx_interface;
 167 #endif
 168
 169 #if BUILD_AT91RM9200 == 1
 170         extern jtag_interface_t at91rm9200_interface;
 171 #endif
 172
 173 #if BUILD_GW16012 == 1
 174         extern jtag_interface_t gw16012_interface;
 175 #endif
 176
 177 #if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
 178         extern jtag_interface_t presto_interface;
 179 #endif
 180
 181 #if BUILD_USBPROG == 1
 182         extern jtag_interface_t usbprog_interface;
 183 #endif
 184
 185 jtag_interface_t *jtag_interfaces[] = {
 186 #if BUILD_PARPORT == 1
 187         &parport_interface,
 188 #endif
 189 #if BUILD_FT2232_FTD2XX == 1
 190         &ft2232_interface,
 191 #endif
 192 #if BUILD_FT2232_LIBFTDI == 1
 193         &ft2232_interface,
 194 #endif
 195 #if BUILD_AMTJTAGACCEL == 1
 196         &amt_jtagaccel_interface,
 197 #endif
 198 #if BUILD_EP93XX == 1
 199         &ep93xx_interface,
 200 #endif
 201 #if BUILD_AT91RM9200 == 1
 202         &at91rm9200_interface,
 203 #endif
 204 #if BUILD_GW16012 == 1
 205         &gw16012_interface,
 206 #endif
 207 #if BUILD_PRESTO_LIBFTDI == 1 || BUILD_PRESTO_FTD2XX == 1
 208         &presto_interface,
 209 #endif
 210 #if BUILD_USBPROG == 1
 211         &usbprog_interface,
 212 #endif
 213         NULL,
 214 };
 215
 216 jtag_interface_t *jtag = NULL;
 217
 218 /* configuration */
 219 jtag_interface_t *jtag_interface = NULL;
 220 int jtag_speed = 0;
 221
 222
 223 /* forward declarations */
 224 int jtag_add_statemove(enum tap_state endstate);
 225 int jtag_add_pathmove(int num_states, enum tap_state *path);
 226 int jtag_add_runtest(int num_cycles, enum tap_state endstate);
 227 int jtag_add_reset(int trst, int srst);
 228 int jtag_add_end_state(enum tap_state endstate);
 229 int jtag_add_sleep(u32 us);
 230 int jtag_execute_queue(void);
 231 int jtag_cancel_queue(void);
 232
 233 /* jtag commands */
 234 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 235 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 236 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 237 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 238 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 239 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 240
 241 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 242
 243 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 244 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 245 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 246 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 247 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 248 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 249
 250 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 251
 252 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 253 {
 254         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 255
 256         if (callback == NULL)
 257         {
 258                 return ERROR_INVALID_ARGUMENTS;
 259         }
 260
 261         if (*callbacks_p)
 262         {
 263                 while ((*callbacks_p)->next)
 264                         callbacks_p = &((*callbacks_p)->next);
 265                 callbacks_p = &((*callbacks_p)->next);
 266         }
 267
 268         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 269         (*callbacks_p)->callback = callback;
 270         (*callbacks_p)->priv = priv;
 271         (*callbacks_p)->next = NULL;
 272
 273         return ERROR_OK;
 274 }
 275
 276 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 277 {
 278         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 279
 280         if (callback == NULL)
 281         {
 282                 return ERROR_INVALID_ARGUMENTS;
 283         }
 284
 285         while (*callbacks_p)
 286         {
 287                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 288                 if ((*callbacks_p)->callback == callback)
 289                 {
 290                         free(*callbacks_p);
 291                         *callbacks_p = *next;
 292                 }
 293                 callbacks_p = next;
 294         }
 295
 296         return ERROR_OK;
 297 }
 298
 299 int jtag_call_event_callbacks(enum jtag_event event)
 300 {
 301         jtag_event_callback_t *callback = jtag_event_callbacks;
 302
 303         DEBUG("jtag event: %s", jtag_event_strings[event]);
 304
 305         while (callback)
 306         {
 307                 callback->callback(event, callback->priv);
 308                 callback = callback->next;
 309         }
 310
 311         return ERROR_OK;
 312 }
 313
 314 /* returns a pointer to the pointer of the last command in queue
 315  * this may be a pointer to the root pointer (jtag_command_queue)
 316  * or to the next member of the last but one command
 317  */
 318 jtag_command_t** jtag_get_last_command_p(void)
 319 {
 320 /*      jtag_command_t *cmd = jtag_command_queue;
 321
 322         if (cmd)
 323                 while (cmd->next)
 324                         cmd = cmd->next;
 325         else
 326                 return &jtag_command_queue;
 327
 328         return &cmd->next;*/
 329
 330         return last_comand_pointer;
 331 }
 332
 333 /* returns a pointer to the n-th device in the scan chain */
 334 jtag_device_t* jtag_get_device(int num)
 335 {
 336         jtag_device_t *device = jtag_devices;
 337         int i = 0;
 338
 339         while (device)
 340         {
 341                 if (num == i)
 342                         return device;
 343                 device = device->next;
 344                 i++;
 345         }
 346
 347         ERROR("jtag device number %d not defined", num);
 348         exit(-1);
 349 }
 350
 351 void* cmd_queue_alloc(size_t size)
 352 {
 353         cmd_queue_page_t **p_page = &cmd_queue_pages;
 354         int offset;
 355
 356         if (*p_page)
 357         {
 358                 while ((*p_page)->next)
 359                         p_page = &((*p_page)->next);
 360                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 361                         p_page = &((*p_page)->next);
 362         }
 363
 364         if (!*p_page)
 365         {
 366                 *p_page = malloc(sizeof(cmd_queue_page_t));
 367                 (*p_page)->used = 0;
 368                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 369                 (*p_page)->next = NULL;
 370         }
 371
 372         offset = (*p_page)->used;
 373         (*p_page)->used += size;
 374
 375         u8 *t=(u8 *)((*p_page)->address);
 376         return t + offset;
 377 }
 378
 379 void cmd_queue_free()
 380 {
 381         cmd_queue_page_t *page = cmd_queue_pages;
 382
 383         while (page)
 384         {
 385                 cmd_queue_page_t *last = page;
 386                 free(page->address);
 387                 page = page->next;
 388                 free(last);
 389         }
 390
 391         cmd_queue_pages = NULL;
 392 }
 393
 394 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 395 {
 396         if (jtag_trst == 1)
 397         {
 398                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 399                 jtag_error=ERROR_JTAG_TRST_ASSERTED;
 400                 return ERROR_JTAG_TRST_ASSERTED;
 401         }
 402
 403         if (state != -1)
 404                 cmd_queue_end_state = state;
 405
 406         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 407                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 408
 409         if (cmd_queue_end_state == TAP_TLR)
 410                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 411
 412         cmd_queue_cur_state = cmd_queue_end_state;
 413
 414         int retval=interface_jtag_add_ir_scan(num_fields, fields, state);
 415         if (retval!=ERROR_OK)
 416                 jtag_error=retval;
 417         return retval;
 418 }
 419
 420 int MINIDRIVER(interface_jtag_add_ir_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
 421 {
 422         jtag_command_t **last_cmd;
 423         jtag_device_t *device;
 424         int i, j;
 425         int scan_size = 0;
 426
 427
 428         last_cmd = jtag_get_last_command_p();
 429
 430         /* allocate memory for a new list member */
 431         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 432         (*last_cmd)->next = NULL;
 433         last_comand_pointer = &((*last_cmd)->next);
 434         (*last_cmd)->type = JTAG_SCAN;
 435
 436         /* allocate memory for ir scan command */
 437         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 438         (*last_cmd)->cmd.scan->ir_scan = 1;
 439         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 440         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 441         (*last_cmd)->cmd.scan->end_state = state;
 442
 443         for (i = 0; i < jtag_num_devices; i++)
 444         {
 445                 int found = 0;
 446                 device = jtag_get_device(i);
 447                 scan_size = device->ir_length;
 448                 (*last_cmd)->cmd.scan->fields[i].device = i;
 449                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 450                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 451                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;     /* disable verification by default */
 452
 453                 /* search the list */
 454                 for (j = 0; j < num_fields; j++)
 455                 {
 456                         if (i == fields[j].device)
 457                         {
 458                                 found = 1;
 459                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 460                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 461
 462                                 if (jtag_verify_capture_ir)
 463                                 {
 464                                         if (fields[j].in_handler==NULL)
 465                                         {
 466                                                 jtag_set_check_value((*last_cmd)->cmd.scan->fields+i, device->expected, device->expected_mask, NULL);
 467                                         } else
 468                                         {
 469                                                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[j].in_handler;
 470                                                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[j].in_handler_priv;
 471                                                 (*last_cmd)->cmd.scan->fields[i].in_check_value = device->expected;
 472                                                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = device->expected_mask;
 473                                         }
 474                                 }
 475
 476                                 device->bypass = 0;
 477                                 break;
 478                         }
 479                 }
 480
 481                 if (!found)
 482                 {
 483                         /* if a device isn't listed, set it to BYPASS */
 484                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 485                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 486                         device->bypass = 1;
 487
 488                 }
 489
 490                 /* update device information */
 491                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 492         }
 493
 494         return ERROR_OK;
 495 }
 496
 497 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 498 {
 499         if (jtag_trst == 1)
 500         {
 501                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 502                 return jtag_error=ERROR_JTAG_TRST_ASSERTED;
 503         }
 504
 505         if (state != -1)
 506                 cmd_queue_end_state = state;
 507
 508         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 509                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 510
 511         if (cmd_queue_end_state == TAP_TLR)
 512                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 513
 514         cmd_queue_cur_state = cmd_queue_end_state;
 515
 516         return interface_jtag_add_plain_ir_scan(num_fields, fields, state);
 517 }
 518
 519 int MINIDRIVER(interface_jtag_add_plain_ir_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
 520 {
 521         int i;
 522         jtag_command_t **last_cmd;
 523
 524         last_cmd = jtag_get_last_command_p();
 525
 526         /* allocate memory for a new list member */
 527         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 528         (*last_cmd)->next = NULL;
 529         last_comand_pointer = &((*last_cmd)->next);
 530         (*last_cmd)->type = JTAG_SCAN;
 531
 532         /* allocate memory for ir scan command */
 533         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 534         (*last_cmd)->cmd.scan->ir_scan = 1;
 535         (*last_cmd)->cmd.scan->num_fields = num_fields;
 536         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 537         (*last_cmd)->cmd.scan->end_state = state;
 538
 539         for (i = 0; i < num_fields; i++)
 540         {
 541                 int num_bits = fields[i].num_bits;
 542                 int num_bytes = CEIL(fields[i].num_bits, 8);
 543                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 544                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 545                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 546                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 547                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 548                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 549                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 550                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 551                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 552         }
 553         return ERROR_OK;
 554 }
 555
 556 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 557 {
 558         if (jtag_trst == 1)
 559         {
 560                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 561                 return jtag_error=ERROR_JTAG_TRST_ASSERTED;
 562         }
 563
 564         if (state != -1)
 565                 cmd_queue_end_state = state;
 566
 567         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 568                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 569
 570         if (cmd_queue_end_state == TAP_TLR)
 571                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 572
 573         cmd_queue_cur_state = cmd_queue_end_state;
 574
 575         return interface_jtag_add_dr_scan(num_fields, fields, state);
 576 }
 577
 578 int MINIDRIVER(interface_jtag_add_dr_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
 579 {
 580         int i, j;
 581         int bypass_devices = 0;
 582         int field_count = 0;
 583         int scan_size;
 584
 585         jtag_command_t **last_cmd = jtag_get_last_command_p();
 586         jtag_device_t *device = jtag_devices;
 587
 588         /* count devices in bypass */
 589         while (device)
 590         {
 591                 if (device->bypass)
 592                         bypass_devices++;
 593                 device = device->next;
 594         }
 595
 596         /* allocate memory for a new list member */
 597         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 598         last_comand_pointer = &((*last_cmd)->next);
 599         (*last_cmd)->next = NULL;
 600         (*last_cmd)->type = JTAG_SCAN;
 601
 602         /* allocate memory for dr scan command */
 603         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 604         (*last_cmd)->cmd.scan->ir_scan = 0;
 605         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 606         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 607         (*last_cmd)->cmd.scan->end_state = state;
 608
 609         for (i = 0; i < jtag_num_devices; i++)
 610         {
 611                 int found = 0;
 612                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 613
 614                 for (j = 0; j < num_fields; j++)
 615                 {
 616                         if (i == fields[j].device)
 617                         {
 618                                 found = 1;
 619                                 scan_size = fields[j].num_bits;
 620                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 621                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 622                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 623                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 624                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_value = fields[j].in_check_value;
 625                                 (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = fields[j].in_check_mask;
 626                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 627                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 628                         }
 629                 }
 630                 if (!found)
 631                 {
 632                         /* if a device isn't listed, the BYPASS register should be selected */
 633                         if (!jtag_get_device(i)->bypass)
 634                         {
 635                                 ERROR("BUG: no scan data for a device not in BYPASS");
 636                                 exit(-1);
 637                         }
 638
 639                         /* program the scan field to 1 bit length, and ignore it's value */
 640                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 641                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 642                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 643                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 644                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 645                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 646                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 647                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 648                 }
 649                 else
 650                 {
 651                         /* if a device is listed, the BYPASS register must not be selected */
 652                         if (jtag_get_device(i)->bypass)
 653                         {
 654                                 WARNING("scan data for a device in BYPASS");
 655                         }
 656                 }
 657         }
 658         return ERROR_OK;
 659 }
 660
 661
 662 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 663 {
 664         if (jtag_trst == 1)
 665         {
 666                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 667                 return jtag_error=ERROR_JTAG_TRST_ASSERTED;
 668         }
 669
 670         if (state != -1)
 671                 cmd_queue_end_state = state;
 672
 673         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 674                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 675
 676         if (cmd_queue_end_state == TAP_TLR)
 677                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 678
 679         cmd_queue_cur_state = cmd_queue_end_state;
 680
 681         return interface_jtag_add_plain_dr_scan(num_fields, fields, state);
 682 }
 683
 684 int MINIDRIVER(interface_jtag_add_plain_dr_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
 685 {
 686         int i;
 687         jtag_command_t **last_cmd = jtag_get_last_command_p();
 688
 689         /* allocate memory for a new list member */
 690         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 691         last_comand_pointer = &((*last_cmd)->next);
 692         (*last_cmd)->next = NULL;
 693         (*last_cmd)->type = JTAG_SCAN;
 694
 695         /* allocate memory for scan command */
 696         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 697         (*last_cmd)->cmd.scan->ir_scan = 0;
 698         (*last_cmd)->cmd.scan->num_fields = num_fields;
 699         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 700         (*last_cmd)->cmd.scan->end_state = state;
 701
 702         for (i = 0; i < num_fields; i++)
 703         {
 704                 int num_bits = fields[i].num_bits;
 705                 int num_bytes = CEIL(fields[i].num_bits, 8);
 706                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 707                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 708                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 709                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 710                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 711                 (*last_cmd)->cmd.scan->fields[i].in_check_value = fields[i].in_check_value;
 712                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = fields[i].in_check_mask;
 713                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 714                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 715         }
 716
 717         return ERROR_OK;
 718 }
 719 int jtag_add_statemove(enum tap_state state)
 720 {
 721         if (jtag_trst == 1)
 722         {
 723                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 724                 return jtag_error=ERROR_JTAG_TRST_ASSERTED;
 725         }
 726
 727         if (state != -1)
 728                 cmd_queue_end_state = state;
 729
 730         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 731                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 732
 733         if (cmd_queue_end_state == TAP_TLR)
 734                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 735
 736         cmd_queue_cur_state = cmd_queue_end_state;
 737
 738         return interface_jtag_add_statemove(state);
 739 }
 740
 741 int MINIDRIVER(interface_jtag_add_statemove)(enum tap_state state)
 742 {
 743         jtag_command_t **last_cmd = jtag_get_last_command_p();
 744
 745         /* allocate memory for a new list member */
 746         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 747         last_comand_pointer = &((*last_cmd)->next);
 748         (*last_cmd)->next = NULL;
 749         (*last_cmd)->type = JTAG_STATEMOVE;
 750
 751         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 752         (*last_cmd)->cmd.statemove->end_state = state;
 753
 754
 755         return ERROR_OK;
 756 }
 757
 758 int jtag_add_pathmove(int num_states, enum tap_state *path)
 759 {
 760         if (jtag_trst == 1)
 761         {
 762                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 763                 return jtag_error=ERROR_JTAG_TRST_ASSERTED;
 764         }
 765
 766         /* the last state has to be a stable state */
 767         if (tap_move_map[path[num_states - 1]] == -1)
 768         {
 769                 ERROR("TAP path doesn't finish in a stable state");
 770                 return jtag_error=ERROR_JTAG_NOT_IMPLEMENTED;
 771         }
 772
 773         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 774                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 775
 776         if (cmd_queue_end_state == TAP_TLR)
 777                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 778
 779         cmd_queue_cur_state = path[num_states - 1];
 780
 781         return interface_jtag_add_pathmove(num_states, path);
 782 }
 783
 784
 785 int MINIDRIVER(interface_jtag_add_pathmove)(int num_states, enum tap_state *path)
 786 {
 787         jtag_command_t **last_cmd = jtag_get_last_command_p();
 788         int i;
 789
 790         /* allocate memory for a new list member */
 791         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 792         last_comand_pointer = &((*last_cmd)->next);
 793         (*last_cmd)->next = NULL;
 794         (*last_cmd)->type = JTAG_PATHMOVE;
 795
 796         (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 797         (*last_cmd)->cmd.pathmove->num_states = num_states;
 798         (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 799
 800         for (i = 0; i < num_states; i++)
 801                 (*last_cmd)->cmd.pathmove->path[i] = path[i];
 802
 803         return ERROR_OK;
 804 }
 805
 806 int MINIDRIVER(interface_jtag_add_runtest)(int num_cycles, enum tap_state state)
 807 {
 808         jtag_command_t **last_cmd = jtag_get_last_command_p();
 809
 810         /* allocate memory for a new list member */
 811         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 812         (*last_cmd)->next = NULL;
 813         last_comand_pointer = &((*last_cmd)->next);
 814         (*last_cmd)->type = JTAG_RUNTEST;
 815
 816         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 817         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 818         (*last_cmd)->cmd.runtest->end_state = state;
 819
 820         return ERROR_OK;
 821 }
 822
 823 int jtag_add_runtest(int num_cycles, enum tap_state state)
 824 {
 825         if (jtag_trst == 1)
 826         {
 827                 jtag_error=ERROR_JTAG_QUEUE_FAILED;
 828                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 829                 return ERROR_JTAG_TRST_ASSERTED;
 830         }
 831
 832         if (state != -1)
 833                 cmd_queue_end_state = state;
 834
 835         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 836                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 837
 838         if (cmd_queue_end_state == TAP_TLR)
 839                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 840
 841         cmd_queue_cur_state = cmd_queue_end_state;
 842
 843         /* executed by sw or hw fifo */
 844         return interface_jtag_add_runtest(num_cycles, state);
 845 }
 846
 847 int jtag_add_reset(int req_trst, int req_srst)
 848 {
 849         int trst_with_tms = 0;
 850         int retval;
 851
 852         if (req_trst == -1)
 853                 req_trst = jtag_trst;
 854
 855         if (req_srst == -1)
 856                 req_srst = jtag_srst;
 857
 858         /* Make sure that jtag_reset_config allows the requested reset */
 859         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 860         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 861         {
 862                 return jtag_error=ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 863         }
 864
 865         /* if TRST pulls SRST, we reset with TAP T-L-R */
 866         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 867         {
 868                 req_trst = 0;
 869                 trst_with_tms = 1;
 870         }
 871
 872         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 873         {
 874                 ERROR("requested nSRST assertion, but the current configuration doesn't support this");
 875                 return jtag_error=ERROR_JTAG_RESET_CANT_SRST;
 876         }
 877
 878         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 879         {
 880                 req_trst = 0;
 881                 trst_with_tms = 1;
 882         }
 883
 884         jtag_trst = req_trst;
 885         jtag_srst = req_srst;
 886
 887         retval = interface_jtag_add_reset(req_trst, req_srst);
 888         if (retval!=ERROR_OK)
 889         {
 890                 jtag_error=retval;
 891                 return retval;
 892         }
 893
 894         if (jtag_srst)
 895         {
 896                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 897         }
 898         else
 899         {
 900                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 901                 if (jtag_nsrst_delay)
 902                         jtag_add_sleep(jtag_nsrst_delay * 1000);
 903         }
 904
 905         if (trst_with_tms)
 906         {
 907                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 908                 jtag_add_end_state(TAP_TLR);
 909                 jtag_add_statemove(TAP_TLR);
 910
 911                 return ERROR_OK;
 912         }
 913
 914         if (jtag_trst)
 915         {
 916                 /* we just asserted nTRST, so we're now in Test-Logic-Reset,
 917                  * and inform possible listeners about this
 918                  */
 919                 cmd_queue_cur_state = TAP_TLR;
 920                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 921         }
 922         else
 923         {
 924                 /* the nTRST line got deasserted, so we're still in Test-Logic-Reset,
 925                  * but we might want to add a delay to give the TAP time to settle
 926                  */
 927                 if (jtag_ntrst_delay)
 928                         jtag_add_sleep(jtag_ntrst_delay * 1000);
 929         }
 930
 931         return retval;
 932
 933 }
 934
 935 int MINIDRIVER(interface_jtag_add_reset)(int req_trst, int req_srst)
 936 {
 937         jtag_command_t **last_cmd = jtag_get_last_command_p();
 938
 939         /* allocate memory for a new list member */
 940         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 941         (*last_cmd)->next = NULL;
 942         last_comand_pointer = &((*last_cmd)->next);
 943         (*last_cmd)->type = JTAG_RESET;
 944
 945         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 946         (*last_cmd)->cmd.reset->trst = req_trst;
 947         (*last_cmd)->cmd.reset->srst = req_srst;
 948
 949
 950         return ERROR_OK;
 951 }
 952
 953 int MINIDRIVER(interface_jtag_add_end_state)(enum tap_state state)
 954 {
 955         jtag_command_t **last_cmd = jtag_get_last_command_p();
 956
 957         /* allocate memory for a new list member */
 958         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 959         (*last_cmd)->next = NULL;
 960         last_comand_pointer = &((*last_cmd)->next);
 961         (*last_cmd)->type = JTAG_END_STATE;
 962
 963         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 964         (*last_cmd)->cmd.end_state->end_state = state;
 965
 966         return ERROR_OK;
 967 }
 968
 969 int jtag_add_end_state(enum tap_state state)
 970 {
 971         int retval = interface_jtag_add_end_state(state);
 972         if (state != -1)
 973                 cmd_queue_end_state = state;
 974         return retval;
 975 }
 976
 977 int MINIDRIVER(interface_jtag_add_sleep)(u32 us)
 978 {
 979         jtag_command_t **last_cmd = jtag_get_last_command_p();
 980
 981         /* allocate memory for a new list member */
 982         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 983         (*last_cmd)->next = NULL;
 984         last_comand_pointer = &((*last_cmd)->next);
 985         (*last_cmd)->type = JTAG_SLEEP;
 986
 987         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 988         (*last_cmd)->cmd.sleep->us = us;
 989
 990         return ERROR_OK;
 991 }
 992
 993 int jtag_add_sleep(u32 us)
 994 {
 995         return interface_jtag_add_sleep(us);
 996 }
 997
 998 int jtag_scan_size(scan_command_t *cmd)
 999 {
1000         int bit_count = 0;
1001         int i;
1002
1003         /* count bits in scan command */
1004         for (i = 0; i < cmd->num_fields; i++)
1005         {
1006                 bit_count += cmd->fields[i].num_bits;
1007         }
1008
1009         return bit_count;
1010 }
1011
1012 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
1013 {
1014         int bit_count = 0;
1015         int i;
1016
1017         bit_count = jtag_scan_size(cmd);
1018         *buffer = malloc(CEIL(bit_count, 8));
1019
1020         bit_count = 0;
1021
1022         for (i = 0; i < cmd->num_fields; i++)
1023         {
1024                 if (cmd->fields[i].out_value)
1025                 {
1026 #ifdef _DEBUG_JTAG_IO_
1027                         char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > 64) ? 64 : cmd->fields[i].num_bits, 16);
1028 #endif
1029                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
1030 #ifdef _DEBUG_JTAG_IO_
1031                         DEBUG("fields[%i].out_value: 0x%s", i, char_buf);
1032                         free(char_buf);
1033 #endif
1034                 }
1035
1036                 bit_count += cmd->fields[i].num_bits;
1037         }
1038
1039         return bit_count;
1040
1041 }
1042
1043 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
1044 {
1045         int i;
1046         int bit_count = 0;
1047         int retval;
1048
1049         /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
1050         retval = ERROR_OK;
1051
1052         for (i = 0; i < cmd->num_fields; i++)
1053         {
1054                 /* if neither in_value nor in_handler
1055                  * are specified we don't have to examine this field
1056                  */
1057                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
1058                 {
1059                         int num_bits = cmd->fields[i].num_bits;
1060                         u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
1061
1062 #ifdef _DEBUG_JTAG_IO_
1063                         char *char_buf;
1064
1065                         char_buf = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1066                         DEBUG("fields[%i].in_value: 0x%s", i, char_buf);
1067                         free(char_buf);
1068 #endif
1069
1070                         if (cmd->fields[i].in_value)
1071                         {
1072                                 buf_cpy(captured, cmd->fields[i].in_value, num_bits);
1073
1074                                 if (cmd->fields[i].in_handler)
1075                                 {
1076                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1077                                         {
1078                                                 WARNING("in_handler reported a failed check");
1079                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1080                                         }
1081                                 }
1082                         }
1083
1084                         /* no in_value specified, but a handler takes care of the scanned data */
1085                         if (cmd->fields[i].in_handler && (!cmd->fields[i].in_value))
1086                         {
1087                                 if (cmd->fields[i].in_handler(captured, cmd->fields[i].in_handler_priv, cmd->fields+i) != ERROR_OK)
1088                                 {
1089                                         /* We're going to call the error:handler later, but if the in_handler
1090                                          * reported an error we report this failure upstream
1091                                          */
1092                                         WARNING("in_handler reported a failed check");
1093                                         retval = ERROR_JTAG_QUEUE_FAILED;
1094                                 }
1095                         }
1096
1097                         free(captured);
1098                 }
1099                 bit_count += cmd->fields[i].num_bits;
1100         }
1101
1102         return retval;
1103 }
1104
1105 int jtag_check_value(u8 *captured, void *priv, scan_field_t *field)
1106 {
1107         int retval = ERROR_OK;
1108         int num_bits = field->num_bits;
1109
1110         int compare_failed = 0;
1111
1112         if (field->in_check_mask)
1113                 compare_failed = buf_cmp_mask(captured, field->in_check_value, field->in_check_mask, num_bits);
1114         else
1115                 compare_failed = buf_cmp(captured, field->in_check_value, num_bits);
1116
1117         if (compare_failed)
1118                 {
1119                 /* An error handler could have caught the failing check
1120                  * only report a problem when there wasn't a handler, or if the handler
1121                  * acknowledged the error
1122                  */
1123                 if (compare_failed)
1124                 {
1125                         char *captured_char = buf_to_str(captured, (num_bits > 64) ? 64 : num_bits, 16);
1126                         char *in_check_value_char = buf_to_str(field->in_check_value, (num_bits > 64) ? 64 : num_bits, 16);
1127
1128                         if (field->in_check_mask)
1129                         {
1130                                 char *in_check_mask_char;
1131                                 in_check_mask_char = buf_to_str(field->in_check_mask, (num_bits > 64) ? 64 : num_bits, 16);
1132                                 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);
1133                                 free(in_check_mask_char);
1134                         }
1135                         else
1136                         {
1137                                 WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s", captured_char, in_check_value_char);
1138                         }
1139
1140                         free(captured_char);
1141                         free(in_check_value_char);
1142
1143                         retval = ERROR_JTAG_QUEUE_FAILED;
1144                 }
1145
1146         }
1147         return retval;
1148 }
1149
1150 /*
1151   set up checking of this field using the in_handler. The values passed in must be valid until
1152   after jtag_execute() has completed.
1153  */
1154 void jtag_set_check_value(scan_field_t *field, u8 *value, u8 *mask, error_handler_t *in_error_handler)
1155 {
1156         if (value)
1157                 field->in_handler = jtag_check_value;
1158         else
1159                 field->in_handler = NULL;       /* No check, e.g. embeddedice uses value==NULL to indicate no check */
1160         field->in_handler_priv = NULL;  /* this will be filled in at the invocation site to point to the field duplicate */
1161         field->in_check_value = value;
1162         field->in_check_mask = mask;
1163 }
1164
1165 enum scan_type jtag_scan_type(scan_command_t *cmd)
1166 {
1167         int i;
1168         int type = 0;
1169
1170         for (i = 0; i < cmd->num_fields; i++)
1171         {
1172                 if (cmd->fields[i].in_value || cmd->fields[i].in_handler)
1173                         type |= SCAN_IN;
1174                 if (cmd->fields[i].out_value)
1175                         type |= SCAN_OUT;
1176         }
1177
1178         return type;
1179 }
1180
1181 int MINIDRIVER(interface_jtag_execute_queue)(void)
1182 {
1183         int retval;
1184
1185         retval = jtag->execute_queue();
1186
1187         cmd_queue_free();
1188
1189         jtag_command_queue = NULL;
1190         last_comand_pointer = &jtag_command_queue;
1191
1192         return retval;
1193 }
1194
1195 int jtag_execute_queue(void)
1196 {
1197         int retval=interface_jtag_execute_queue();
1198         if (retval==ERROR_OK)
1199         {
1200                 retval=jtag_error;
1201         }
1202         jtag_error=ERROR_OK;
1203         return retval;
1204 }
1205
1206 int jtag_reset_callback(enum jtag_event event, void *priv)
1207 {
1208         jtag_device_t *device = priv;
1209
1210         DEBUG("-");
1211
1212         if (event == JTAG_TRST_ASSERTED)
1213         {
1214                 buf_set_ones(device->cur_instr, device->ir_length);
1215                 device->bypass = 1;
1216         }
1217
1218         return ERROR_OK;
1219 }
1220
1221 void jtag_sleep(u32 us)
1222 {
1223         usleep(us);
1224 }
1225
1226 /* Try to examine chain layout according to IEEE 1149.1 §12
1227  */
1228 int jtag_examine_chain()
1229 {
1230         jtag_device_t *device = jtag_devices;
1231         scan_field_t field;
1232         u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
1233         int i;
1234         int bit_count;
1235         int device_count = 0;
1236         u8 zero_check = 0x0;
1237         u8 one_check = 0xff;
1238
1239         field.device = 0;
1240         field.num_bits = sizeof(idcode_buffer) * 8;
1241         field.out_value = idcode_buffer;
1242         field.out_mask = NULL;
1243         field.in_value = idcode_buffer;
1244         field.in_check_value = NULL;
1245         field.in_check_mask = NULL;
1246         field.in_handler = NULL;
1247         field.in_handler_priv = NULL;
1248
1249         for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
1250         {
1251                 buf_set_u32(idcode_buffer, i * 32, 32, 0x000000FF);
1252         }
1253
1254         jtag_add_plain_dr_scan(1, &field, TAP_TLR);
1255         jtag_execute_queue();
1256
1257         for (i = 0; i < JTAG_MAX_CHAIN_SIZE * 4; i++)
1258         {
1259                 zero_check |= idcode_buffer[i];
1260                 one_check &= idcode_buffer[i];
1261         }
1262
1263         /* if there wasn't a single non-zero bit or if all bits were one, the scan isn't valid */
1264         if ((zero_check == 0x00) || (one_check == 0xff))
1265         {
1266                 ERROR("JTAG communication failure, check connection, JTAG interface, target power etc.");
1267                 return ERROR_JTAG_INIT_FAILED;
1268         }
1269
1270         for (bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
1271         {
1272                 u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
1273                 if ((idcode & 1) == 0)
1274                 {
1275                         /* LSB must not be 0, this indicates a device in bypass */
1276                         device_count++;
1277
1278                         bit_count += 1;
1279                 }
1280                 else
1281                 {
1282                         u32 manufacturer;
1283                         u32 part;
1284                         u32 version;
1285
1286                         if (idcode == 0x000000FF)
1287                         {
1288                                 /* End of chain (invalid manufacturer ID) */
1289                                 break;
1290                         }
1291
1292                         if (device)
1293                         {
1294                                 device->idcode = idcode;
1295                                 device = device->next;
1296                         }
1297                         device_count++;
1298
1299                         manufacturer = (idcode & 0xffe) >> 1;
1300                         part = (idcode & 0xffff000) >> 12;
1301                         version = (idcode & 0xf0000000) >> 28;
1302
1303                         INFO("JTAG device found: 0x%8.8x (Manufacturer: 0x%3.3x, Part: 0x%4.4x, Version: 0x%1.1x)",
1304                                 idcode, manufacturer, part, version);
1305
1306                         bit_count += 32;
1307                 }
1308         }
1309
1310         /* see if number of discovered devices matches configuration */
1311         if (device_count != jtag_num_devices)
1312         {
1313                 ERROR("number of discovered devices in JTAG chain (%i) doesn't match configuration (%i)",
1314                         device_count, jtag_num_devices);
1315                 ERROR("check the config file and ensure proper JTAG communication (connections, speed, ...)");
1316                 return ERROR_JTAG_INIT_FAILED;
1317         }
1318
1319         return ERROR_OK;
1320 }
1321
1322 int jtag_validate_chain()
1323 {
1324         jtag_device_t *device = jtag_devices;
1325         int total_ir_length = 0;
1326         u8 *ir_test = NULL;
1327         scan_field_t field;
1328         int chain_pos = 0;
1329
1330         while (device)
1331         {
1332                 total_ir_length += device->ir_length;
1333                 device = device->next;
1334         }
1335
1336         total_ir_length += 2;
1337         ir_test = malloc(CEIL(total_ir_length, 8));
1338         buf_set_ones(ir_test, total_ir_length);
1339
1340         field.device = 0;
1341         field.num_bits = total_ir_length;
1342         field.out_value = ir_test;
1343         field.out_mask = NULL;
1344         field.in_value = ir_test;
1345         field.in_check_value = NULL;
1346         field.in_check_mask = NULL;
1347         field.in_handler = NULL;
1348         field.in_handler_priv = NULL;
1349
1350         jtag_add_plain_ir_scan(1, &field, TAP_TLR);
1351         jtag_execute_queue();
1352
1353         device = jtag_devices;
1354         while (device)
1355         {
1356                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1357                 {
1358                         char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1359                         ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1360                         free(cbuf);
1361                         free(ir_test);
1362                         return ERROR_JTAG_INIT_FAILED;
1363                 }
1364                 chain_pos += device->ir_length;
1365                 device = device->next;
1366         }
1367
1368         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1369         {
1370                 char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
1371                 ERROR("Error validating JTAG scan chain, IR mismatch, scan returned 0x%s", cbuf);
1372                 free(cbuf);
1373                 free(ir_test);
1374                 return ERROR_JTAG_INIT_FAILED;
1375         }
1376
1377         free(ir_test);
1378
1379         return ERROR_OK;
1380 }
1381
1382 int jtag_register_commands(struct command_context_s *cmd_ctx)
1383 {
1384         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1385                 COMMAND_CONFIG, NULL);
1386         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1387                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1388         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1389                 COMMAND_CONFIG, "jtag_device <ir_length> <ir_expected> <ir_mask>");
1390         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1391                 COMMAND_CONFIG, NULL);
1392         register_command(cmd_ctx, NULL, "jtag_nsrst_delay", handle_jtag_nsrst_delay_command,
1393                 COMMAND_CONFIG, NULL);
1394         register_command(cmd_ctx, NULL, "jtag_ntrst_delay", handle_jtag_ntrst_delay_command,
1395                 COMMAND_CONFIG, NULL);
1396
1397         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1398                 COMMAND_EXEC, "print current scan chain configuration");
1399
1400         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1401                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1402         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1403                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1404         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1405                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1406         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1407                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1408         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1409                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1410         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1411                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1412
1413         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1414                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1415         return ERROR_OK;
1416 }
1417
1418 int jtag_interface_init(struct command_context_s *cmd_ctx)
1419 {
1420         if (!jtag_interface)
1421         {
1422                 /* nothing was previously specified by "interface" command */
1423                 ERROR("JTAG interface has to be specified, see \"interface\" command");
1424                 return ERROR_JTAG_INVALID_INTERFACE;
1425         }
1426
1427         if (jtag_interface->init() != ERROR_OK)
1428                 return ERROR_JTAG_INIT_FAILED;
1429
1430         jtag = jtag_interface;
1431         return ERROR_OK;
1432 }
1433
1434 int jtag_init(struct command_context_s *cmd_ctx)
1435 {
1436         int validate_tries = 0;
1437         jtag_device_t *device;
1438
1439         DEBUG("-");
1440
1441         if (!jtag && jtag_interface_init(cmd_ctx) != ERROR_OK)
1442                 return ERROR_JTAG_INIT_FAILED;
1443
1444         device = jtag_devices;
1445         jtag_ir_scan_size = 0;
1446         jtag_num_devices = 0;
1447         while (device != NULL)
1448         {
1449                 jtag_ir_scan_size += device->ir_length;
1450                 jtag_num_devices++;
1451                 device = device->next;
1452         }
1453
1454         jtag_add_statemove(TAP_TLR);
1455         jtag_execute_queue();
1456
1457         /* examine chain first, as this could discover the real chain layout */
1458         if (jtag_examine_chain() != ERROR_OK)
1459         {
1460                 ERROR("trying to validate configured JTAG chain anyway...");
1461         }
1462
1463         while (jtag_validate_chain() != ERROR_OK)
1464         {
1465                 validate_tries++;
1466                 if (validate_tries > 5)
1467                 {
1468                         ERROR("Could not validate JTAG chain, exit");
1469                         return ERROR_JTAG_INVALID_INTERFACE;
1470                 }
1471                 usleep(10000);
1472         }
1473
1474         return ERROR_OK;
1475 }
1476
1477 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1478 {
1479         int i;
1480
1481         /* check whether the interface is already configured */
1482         if (jtag_interface)
1483         {
1484                 WARNING("Interface already configured, ignoring");
1485                 return ERROR_OK;
1486         }
1487
1488         /* interface name is a mandatory argument */
1489         if (argc < 1 || args[0][0] == '\0')
1490         {
1491                 return ERROR_COMMAND_SYNTAX_ERROR;
1492         }
1493
1494         for (i=0; jtag_interfaces[i]; i++)
1495         {
1496                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1497                 {
1498                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1499                                 exit(-1);
1500
1501                         jtag_interface = jtag_interfaces[i];
1502                         return ERROR_OK;
1503                 }
1504         }
1505
1506         /* no valid interface was found (i.e. the configuration option,
1507          * didn't match one of the compiled-in interfaces
1508          */
1509         ERROR("No valid jtag interface found (%s)", args[0]);
1510         ERROR("compiled-in jtag interfaces:");
1511         for (i = 0; jtag_interfaces[i]; i++)
1512         {
1513                 ERROR("%i: %s", i, jtag_interfaces[i]->name);
1514         }
1515
1516         return ERROR_JTAG_INVALID_INTERFACE;
1517 }
1518
1519 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1520 {
1521         jtag_device_t **last_device_p = &jtag_devices;
1522
1523         if (*last_device_p)
1524         {
1525                 while ((*last_device_p)->next)
1526                         last_device_p = &((*last_device_p)->next);
1527                 last_device_p = &((*last_device_p)->next);
1528         }
1529
1530         if (argc < 3)
1531                 return ERROR_OK;
1532
1533         *last_device_p = malloc(sizeof(jtag_device_t));
1534         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1535
1536         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1537         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1538         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1539         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1540
1541         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1542         (*last_device_p)->bypass = 1;
1543         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1544
1545         (*last_device_p)->next = NULL;
1546
1547         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1548
1549         jtag_num_devices++;
1550
1551         return ERROR_OK;
1552 }
1553
1554 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1555 {
1556         jtag_device_t *device = jtag_devices;
1557         int device_count = 0;
1558
1559         while (device)
1560         {
1561                 u32 expected, expected_mask, cur_instr;
1562                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1563                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1564                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1565                 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);
1566                 device = device->next;
1567                 device_count++;
1568         }
1569
1570         return ERROR_OK;
1571 }
1572
1573 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1574 {
1575         if (argc >= 1)
1576         {
1577                 if (strcmp(args[0], "none") == 0)
1578                         jtag_reset_config = RESET_NONE;
1579                 else if (strcmp(args[0], "trst_only") == 0)
1580                         jtag_reset_config = RESET_HAS_TRST;
1581                 else if (strcmp(args[0], "srst_only") == 0)
1582                         jtag_reset_config = RESET_HAS_SRST;
1583                 else if (strcmp(args[0], "trst_and_srst") == 0)
1584                         jtag_reset_config = RESET_TRST_AND_SRST;
1585                 else
1586                 {
1587                         ERROR("invalid reset_config argument, defaulting to none");
1588                         jtag_reset_config = RESET_NONE;
1589                         return ERROR_INVALID_ARGUMENTS;
1590                 }
1591         }
1592
1593         if (argc >= 2)
1594         {
1595                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1596                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1597                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1598                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1599                 else if (strcmp(args[1], "combined") == 0)
1600                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1601                 else if (strcmp(args[1], "separate") == 0)
1602                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1603                 else
1604                 {
1605                         ERROR("invalid reset_config argument, defaulting to none");
1606                         jtag_reset_config = RESET_NONE;
1607                         return ERROR_INVALID_ARGUMENTS;
1608                 }
1609         }
1610
1611         if (argc >= 3)
1612         {
1613                 if (strcmp(args[2], "trst_open_drain") == 0)
1614                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1615                 else if (strcmp(args[2], "trst_push_pull") == 0)
1616                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1617                 else
1618                 {
1619                         ERROR("invalid reset_config argument, defaulting to none");
1620                         jtag_reset_config = RESET_NONE;
1621                         return ERROR_INVALID_ARGUMENTS;
1622                 }
1623         }
1624
1625         if (argc >= 4)
1626         {
1627                 if (strcmp(args[3], "srst_push_pull") == 0)
1628                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1629                 else if (strcmp(args[3], "srst_open_drain") == 0)
1630                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1631                 else
1632                 {
1633                         ERROR("invalid reset_config argument, defaulting to none");
1634                         jtag_reset_config = RESET_NONE;
1635                         return ERROR_INVALID_ARGUMENTS;
1636                 }
1637         }
1638
1639         return ERROR_OK;
1640 }
1641
1642 int handle_jtag_nsrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1643 {
1644         if (argc < 1)
1645         {
1646                 ERROR("jtag_nsrst_delay <ms> command takes one required argument");
1647                 exit(-1);
1648         }
1649         else
1650         {
1651                 jtag_nsrst_delay = strtoul(args[0], NULL, 0);
1652         }
1653
1654         return ERROR_OK;
1655 }
1656
1657 int handle_jtag_ntrst_delay_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1658 {
1659         if (argc < 1)
1660         {
1661                 ERROR("jtag_ntrst_delay <ms> command takes one required argument");
1662                 exit(-1);
1663         }
1664         else
1665         {
1666                 jtag_ntrst_delay = strtoul(args[0], NULL, 0);
1667         }
1668
1669         return ERROR_OK;
1670 }
1671
1672 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1673 {
1674         if (argc == 0)
1675                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1676
1677         if (argc > 0)
1678         {
1679                 /* this command can be called during CONFIG,
1680                  * in which case jtag isn't initialized */
1681                 if (jtag)
1682                         jtag->speed(strtoul(args[0], NULL, 0));
1683                 else
1684                         jtag_speed = strtoul(args[0], NULL, 0);
1685         }
1686
1687         return ERROR_OK;
1688 }
1689
1690 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1691 {
1692         enum tap_state state;
1693
1694         if (argc < 1)
1695         {
1696                 return ERROR_COMMAND_SYNTAX_ERROR;
1697         }
1698         else
1699         {
1700                 for (state = 0; state < 16; state++)
1701                 {
1702                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1703                         {
1704                                 jtag_add_end_state(state);
1705                                 jtag_execute_queue();
1706                         }
1707                 }
1708         }
1709         command_print(cmd_ctx, "current endstate: %s", tap_state_strings[end_state]);
1710
1711         return ERROR_OK;
1712 }
1713
1714 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1715 {
1716         int trst = -1;
1717         int srst = -1;
1718         int retval;
1719
1720         if (argc < 2)
1721         {
1722                 return ERROR_COMMAND_SYNTAX_ERROR;
1723
1724         }
1725
1726         if (args[0][0] == '1')
1727                 trst = 1;
1728         else if (args[0][0] == '0')
1729                 trst = 0;
1730         else
1731         {
1732                 return ERROR_COMMAND_SYNTAX_ERROR;
1733         }
1734
1735         if (args[1][0] == '1')
1736                 srst = 1;
1737         else if (args[1][0] == '0')
1738                 srst = 0;
1739         else
1740         {
1741                 return ERROR_COMMAND_SYNTAX_ERROR;
1742         }
1743
1744         if (!jtag && jtag_interface_init(cmd_ctx) != ERROR_OK)
1745                 return ERROR_JTAG_INIT_FAILED;
1746
1747         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1748         {
1749                 switch (retval)
1750                 {
1751                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1752                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1753                                 break;
1754                         case ERROR_JTAG_RESET_CANT_SRST:
1755                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1756                                 break;
1757                         default:
1758                                 command_print(cmd_ctx, "unknown error");
1759                 }
1760         }
1761         jtag_execute_queue();
1762
1763         return ERROR_OK;
1764 }
1765
1766 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1767 {
1768         if (argc < 1)
1769         {
1770                 return ERROR_COMMAND_SYNTAX_ERROR;
1771         }
1772
1773         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1774         jtag_execute_queue();
1775
1776         return ERROR_OK;
1777
1778 }
1779
1780 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1781 {
1782         enum tap_state state;
1783
1784         state = -1;
1785         if (argc == 1)
1786         {
1787                 for (state = 0; state < 16; state++)
1788                 {
1789                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1790                         {
1791                                 break;
1792                         }
1793                 }
1794         }
1795
1796         jtag_add_statemove(state);
1797         jtag_execute_queue();
1798
1799         return ERROR_OK;
1800
1801 }
1802
1803 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1804 {
1805         int i;
1806         scan_field_t *fields;
1807
1808         if ((argc < 2) || (argc % 2))
1809         {
1810                 return ERROR_COMMAND_SYNTAX_ERROR;
1811         }
1812
1813         fields = malloc(sizeof(scan_field_t) * argc / 2);
1814
1815         for (i = 0; i < argc / 2; i++)
1816         {
1817                 int device = strtoul(args[i*2], NULL, 0);
1818                 int field_size = jtag_get_device(device)->ir_length;
1819                 fields[i].device = device;
1820                 fields[i].out_value = malloc(CEIL(field_size, 8));
1821                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1822                 fields[i].out_mask = NULL;
1823                 fields[i].in_value = NULL;
1824                 fields[i].in_check_mask = NULL;
1825                 fields[i].in_handler = NULL;
1826                 fields[i].in_handler_priv = NULL;
1827         }
1828
1829         jtag_add_ir_scan(argc / 2, fields, -1);
1830         jtag_execute_queue();
1831
1832         for (i = 0; i < argc / 2; i++)
1833                 free(fields[i].out_value);
1834
1835         free (fields);
1836
1837         return ERROR_OK;
1838 }
1839
1840 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1841 {
1842         scan_field_t *fields;
1843         int num_fields = 0;
1844         int field_count = 0;
1845         var_t *var;
1846         int i, j;
1847
1848         if ((argc < 2) || (argc % 2))
1849         {
1850                 return ERROR_COMMAND_SYNTAX_ERROR;
1851         }
1852
1853         for (i = 0; i < argc; i+=2)
1854         {
1855                 var = get_var_by_namenum(args[i+1]);
1856                 if (var)
1857                 {
1858                         num_fields += var->num_fields;
1859                 }
1860                 else
1861                 {
1862                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1863                         return ERROR_OK;
1864                 }
1865         }
1866
1867         fields = malloc(sizeof(scan_field_t) * num_fields);
1868
1869         for (i = 0; i < argc; i+=2)
1870         {
1871                 var = get_var_by_namenum(args[i+1]);
1872
1873                 for (j = 0; j < var->num_fields; j++)
1874                 {
1875                         fields[field_count].device = strtol(args[i], NULL, 0);
1876                         fields[field_count].num_bits = var->fields[j].num_bits;
1877                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1878                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1879                         fields[field_count].out_mask = NULL;
1880                         fields[field_count].in_value = fields[field_count].out_value;
1881                         fields[field_count].in_check_mask = NULL;
1882                         fields[field_count].in_check_value = NULL;
1883                         fields[field_count].in_handler = field_le_to_host;
1884                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1885                 }
1886         }
1887
1888         jtag_add_dr_scan(num_fields, fields, -1);
1889         jtag_execute_queue();
1890
1891         for (i = 0; i < argc / 2; i++)
1892                 free(fields[i].out_value);
1893
1894         free(fields);
1895
1896         return ERROR_OK;
1897 }
1898
1899
1900
1901 int MINIDRIVER(interface_jtag_add_shift)(const enum tap_state shift_state, const enum tap_state end_state, int num_bits, u32 value)
1902 {
1903         u8 out_buf[4];
1904         buf_set_u32(out_buf, 0, 32, value);
1905
1906         /* allocate memory for a new list member */
1907         jtag_command_t **last_cmd;
1908         last_cmd = jtag_get_last_command_p();
1909         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
1910         last_comand_pointer = &((*last_cmd)->next);
1911         (*last_cmd)->next = NULL;
1912         (*last_cmd)->type = JTAG_SCAN;
1913
1914         /* allocate memory for scan command */
1915         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
1916         (*last_cmd)->cmd.scan->ir_scan = (shift_state==TAP_SI);
1917         (*last_cmd)->cmd.scan->num_fields = 1;
1918         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(1 * sizeof(scan_field_t));
1919         (*last_cmd)->cmd.scan->end_state = end_state;
1920
1921         int num_bytes = CEIL(num_bits, 8);
1922         int i=0;
1923         (*last_cmd)->cmd.scan->fields[i].device = 0; /* not used by any drivers */
1924         (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
1925         (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(out_buf, cmd_queue_alloc(num_bytes), num_bits);
1926         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
1927         (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
1928         (*last_cmd)->cmd.scan->fields[i].in_check_value = NULL;
1929         (*last_cmd)->cmd.scan->fields[i].in_check_mask = NULL;
1930         (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
1931         (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
1932
1933         return ERROR_OK;
1934 }
1935
1936 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1937 {
1938         if (argc == 1)
1939         {
1940                 if (strcmp(args[0], "enable") == 0)
1941                 {
1942                         jtag_verify_capture_ir = 1;
1943                 }
1944                 else if (strcmp(args[0], "disable") == 0)
1945                 {
1946                         jtag_verify_capture_ir = 0;
1947                 } else
1948                 {
1949                         return ERROR_COMMAND_SYNTAX_ERROR;
1950                 }
1951         } else if (argc != 0)
1952         {
1953                 return ERROR_COMMAND_SYNTAX_ERROR;
1954         }
1955
1956         command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1957
1958         return ERROR_OK;
1959 }