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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 u8 tap_move[6][6] =
  63 {
  64 /*        TLR   RTI   SD    PD    SI    PI             */
  65         {0x7f, 0x00, 0x17, 0x0a, 0x1b, 0x16},   /* TLR */
  66         {0x7f, 0x00, 0x25, 0x05, 0x2b, 0x0b},   /* RTI */
  67         {0x7f, 0x31, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
  68         {0x7f, 0x30, 0x20, 0x17, 0x1e, 0x2f},   /* PD  */
  69         {0x7f, 0x31, 0x07, 0x17, 0x00, 0x01},   /* SI  */
  70         {0x7f, 0x30, 0x1c, 0x17, 0x20, 0x2f}    /* PI  */
  71 };
  72
  73 int tap_move_map[16] = {
  74         0, -1, -1,  2, -1,  3, -1, -1,
  75         1, -1, -1,  4, -1,  5, -1, -1
  76 };
  77
  78 tap_transition_t tap_transitions[16] =
  79 {
  80         {TAP_TLR, TAP_RTI},             /* TLR */
  81         {TAP_SIS, TAP_CD},              /* SDS */
  82         {TAP_E1D, TAP_SD},              /* CD  */
  83         {TAP_E1D, TAP_SD},              /* SD  */
  84         {TAP_UD,  TAP_PD},              /* E1D */
  85         {TAP_E2D, TAP_PD},              /* PD  */
  86         {TAP_UD,  TAP_SD},              /* E2D */
  87         {TAP_SDS, TAP_RTI},             /* UD  */
  88         {TAP_SDS, TAP_RTI},             /* RTI */
  89         {TAP_TLR, TAP_CI},              /* SIS */
  90         {TAP_E1I, TAP_SI},              /* CI  */
  91         {TAP_E1I, TAP_SI},              /* SI  */
  92         {TAP_UI,  TAP_PI},              /* E1I */
  93         {TAP_E2I, TAP_PI},              /* PI  */
  94         {TAP_UI,  TAP_SI},              /* E2I */
  95         {TAP_SDS, TAP_RTI}              /* UI  */
  96 };
  97
  98 enum tap_state end_state = TAP_TLR;
  99 enum tap_state cur_state = TAP_TLR;
 100 int jtag_trst = 0;
 101 int jtag_srst = 0;
 102
 103 jtag_command_t *jtag_command_queue = NULL;
 104 jtag_command_t **last_comand_pointer = &jtag_command_queue;
 105 jtag_device_t *jtag_devices = NULL;
 106 int jtag_num_devices = 0;
 107 int jtag_ir_scan_size = 0;
 108 enum reset_types jtag_reset_config = RESET_NONE;
 109 enum tap_state cmd_queue_end_state = TAP_TLR;
 110 enum tap_state cmd_queue_cur_state = TAP_TLR;
 111
 112 int jtag_verify_capture_ir = 1;
 113
 114 /* callbacks to inform high-level handlers about JTAG state changes */
 115 jtag_event_callback_t *jtag_event_callbacks;
 116
 117 /* jtag interfaces (parport, FTDI-USB, TI-USB, ...)
 118  */
 119 #if BUILD_PARPORT == 1
 120         extern jtag_interface_t parport_interface;
 121 #endif
 122
 123 #if BUILD_FTDI2232 == 1
 124         extern jtag_interface_t ftdi2232_interface;
 125 #endif
 126
 127 #if BUILD_FTD2XX == 1
 128         extern jtag_interface_t ftd2xx_interface;
 129 #endif
 130
 131 #if BUILD_AMTJTAGACCEL == 1
 132         extern jtag_interface_t amt_jtagaccel_interface;
 133 #endif
 134
 135 #if BUILD_EP93XX == 1
 136         extern jtag_interface_t ep93xx_interface;
 137 #endif
 138
 139 jtag_interface_t *jtag_interfaces[] = {
 140 #if BUILD_PARPORT == 1
 141         &parport_interface,
 142 #endif
 143 #if BUILD_FTDI2232 == 1
 144         &ftdi2232_interface,
 145 #endif
 146 #if BUILD_FTD2XX == 1
 147         &ftd2xx_interface,
 148 #endif
 149 #if BUILD_AMTJTAGACCEL == 1
 150         &amt_jtagaccel_interface,
 151 #endif
 152 #if BUILD_EP93XX == 1
 153         &ep93xx_interface,
 154 #endif
 155         NULL,
 156 };
 157
 158 jtag_interface_t *jtag = NULL;
 159
 160 /* configuration */
 161 char* jtag_interface = NULL;
 162 int jtag_speed = -1;
 163
 164 /* forward declarations */
 165
 166 /* jtag commands */
 167 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 168 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 169 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 170 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 171
 172 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 173
 174 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 175 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 176 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 177 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 178 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 179 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 180
 181 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 182
 183 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 184 {
 185         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 186
 187         if (callback == NULL)
 188         {
 189                 return ERROR_INVALID_ARGUMENTS;
 190         }
 191
 192         if (*callbacks_p)
 193         {
 194                 while ((*callbacks_p)->next)
 195                         callbacks_p = &((*callbacks_p)->next);
 196                 callbacks_p = &((*callbacks_p)->next);
 197         }
 198
 199         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 200         (*callbacks_p)->callback = callback;
 201         (*callbacks_p)->priv = priv;
 202         (*callbacks_p)->next = NULL;
 203
 204         return ERROR_OK;
 205 }
 206
 207 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 208 {
 209         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 210
 211         if (callback == NULL)
 212         {
 213                 return ERROR_INVALID_ARGUMENTS;
 214         }
 215
 216         while (*callbacks_p)
 217         {
 218                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 219                 if ((*callbacks_p)->callback == callback)
 220                 {
 221                         free(*callbacks_p);
 222                         *callbacks_p = *next;
 223                 }
 224                 callbacks_p = next;
 225         }
 226
 227         return ERROR_OK;
 228 }
 229
 230 int jtag_call_event_callbacks(enum jtag_event event)
 231 {
 232         jtag_event_callback_t *callback = jtag_event_callbacks;
 233
 234         DEBUG("jtag event: %i", event);
 235
 236         while (callback)
 237         {
 238                 callback->callback(event, callback->priv);
 239                 callback = callback->next;
 240         }
 241
 242         return ERROR_OK;
 243 }
 244
 245 /* returns a pointer to the pointer of the last command in queue
 246  * this may be a pointer to the root pointer (jtag_command_queue)
 247  * or to the next member of the last but one command
 248  */
 249 jtag_command_t** jtag_get_last_command_p(void)
 250 {
 251 /*      jtag_command_t *cmd = jtag_command_queue;
 252
 253         if (cmd)
 254                 while (cmd->next)
 255                         cmd = cmd->next;
 256         else
 257                 return &jtag_command_queue;
 258
 259         return &cmd->next;*/
 260
 261         return last_comand_pointer;
 262 }
 263
 264 /* returns a pointer to the n-th device in the scan chain */
 265 jtag_device_t* jtag_get_device(int num)
 266 {
 267         jtag_device_t *device = jtag_devices;
 268         int i = 0;
 269
 270         while (device)
 271         {
 272                 if (num == i)
 273                         return device;
 274                 device = device->next;
 275                 i++;
 276         }
 277
 278         return NULL;
 279 }
 280
 281 void* cmd_queue_alloc(size_t size)
 282 {
 283         cmd_queue_page_t **p_page = &cmd_queue_pages;
 284         int offset;
 285
 286         if (*p_page)
 287         {
 288                 while ((*p_page)->next)
 289                         p_page = &((*p_page)->next);
 290                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 291                         p_page = &((*p_page)->next);
 292         }
 293
 294         if (!*p_page)
 295         {
 296                 *p_page = malloc(sizeof(cmd_queue_page_t));
 297                 (*p_page)->used = 0;
 298                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 299                 (*p_page)->next = NULL;
 300         }
 301
 302         offset = (*p_page)->used;
 303         (*p_page)->used += size;
 304
 305         return ((*p_page)->address) + offset;
 306 }
 307
 308 void cmd_queue_free()
 309 {
 310         cmd_queue_page_t *page = cmd_queue_pages;
 311
 312         while (page)
 313         {
 314                 cmd_queue_page_t *last = page;
 315                 free(page->address);
 316                 page = page->next;
 317                 free(last);
 318         }
 319
 320         cmd_queue_pages = NULL;
 321 }
 322
 323 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 324 {
 325         jtag_command_t **last_cmd;
 326         jtag_device_t *device;
 327         int i, j;
 328         int scan_size = 0;
 329         /*      int changed = 0; */
 330
 331         if (jtag_trst == 1)
 332         {
 333                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 334                 return ERROR_JTAG_TRST_ASSERTED;
 335         }
 336
 337         /*
 338         for (i=0; i<num_fields; i++)
 339         {
 340                 device = jtag_get_device(fields[i].device);
 341                 if (device)
 342                 {
 343                         if (buf_cmp(device->cur_instr, fields[i].out_value, device->ir_length))
 344                                 changed = 1;
 345                 }
 346                 else
 347                 {
 348                         ERROR("inexistant device specified for ir scan");
 349                         return ERROR_INVALID_ARGUMENTS;
 350                 }
 351         }
 352
 353         if (!changed)
 354                 return ERROR_OK;
 355         */
 356
 357         last_cmd = jtag_get_last_command_p();
 358
 359         /* allocate memory for a new list member */
 360         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 361         (*last_cmd)->next = NULL;
 362         last_comand_pointer = &((*last_cmd)->next);
 363         (*last_cmd)->type = JTAG_SCAN;
 364
 365         /* allocate memory for ir scan command */
 366         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 367         (*last_cmd)->cmd.scan->ir_scan = 1;
 368         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 369         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 370         (*last_cmd)->cmd.scan->end_state = state;
 371
 372         if (state != -1)
 373                 cmd_queue_end_state = state;
 374
 375         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 376                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 377
 378         if (cmd_queue_end_state == TAP_TLR)
 379                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 380
 381         cmd_queue_cur_state = cmd_queue_end_state;
 382
 383         for (i=0; i < jtag_num_devices; i++)
 384         {
 385                 int found = 0;
 386                 device = jtag_get_device(i);
 387                 scan_size = device->ir_length;
 388                 (*last_cmd)->cmd.scan->fields[i].device = i;
 389                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 390                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 391                 if (jtag_verify_capture_ir)
 392                 {
 393                         (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(device->expected, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 394                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(device->expected_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 395                 }
 396                 else
 397                 {
 398                         (*last_cmd)->cmd.scan->fields[i].in_check_value = NULL;
 399                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = NULL;
 400                 }
 401                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 402                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 403
 404                 /* search the list */
 405                 for (j=0; j < num_fields; j++)
 406                 {
 407                         if (i == fields[j].device)
 408                         {
 409                                 found = 1;
 410                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 411                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 412
 413                                 device->bypass = 0;
 414                                 break;
 415                         }
 416                 }
 417
 418                 if (!found)
 419                 {
 420                         /* if a device isn't listed, set it to BYPASS */
 421                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 422                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 423                         device->bypass = 1;
 424
 425                 }
 426
 427                 /* update device information */
 428                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 429         }
 430
 431         return ERROR_OK;
 432 }
 433
 434 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 435 {
 436         jtag_command_t **last_cmd;
 437         int i;
 438
 439         if (jtag_trst == 1)
 440         {
 441                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 442                 return ERROR_JTAG_TRST_ASSERTED;
 443         }
 444
 445         last_cmd = jtag_get_last_command_p();
 446
 447         /* allocate memory for a new list member */
 448         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 449         (*last_cmd)->next = NULL;
 450         last_comand_pointer = &((*last_cmd)->next);
 451         (*last_cmd)->type = JTAG_SCAN;
 452
 453         /* allocate memory for ir scan command */
 454         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 455         (*last_cmd)->cmd.scan->ir_scan = 1;
 456         (*last_cmd)->cmd.scan->num_fields = num_fields;
 457         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 458         (*last_cmd)->cmd.scan->end_state = state;
 459
 460         if (state != -1)
 461                 cmd_queue_end_state = state;
 462
 463         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 464                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 465
 466         if (cmd_queue_end_state == TAP_TLR)
 467                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 468
 469         cmd_queue_cur_state = cmd_queue_end_state;
 470
 471         for (i = 0; i < num_fields; i++)
 472         {
 473                 int num_bits = fields[i].num_bits;
 474                 int num_bytes = CEIL(fields[i].num_bits, 8);
 475                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 476                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 477                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 478                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 479                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 480                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 481                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 482                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 483                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 484         }
 485         return ERROR_OK;
 486 }
 487
 488 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 489 {
 490         int i, j;
 491         int bypass_devices = 0;
 492         int field_count = 0;
 493         jtag_command_t **last_cmd = jtag_get_last_command_p();
 494         jtag_device_t *device = jtag_devices;
 495         int scan_size;
 496
 497         if (jtag_trst == 1)
 498         {
 499                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 500                 return ERROR_JTAG_TRST_ASSERTED;
 501         }
 502
 503         /* count devices in bypass */
 504         while (device)
 505         {
 506                 if (device->bypass)
 507                         bypass_devices++;
 508                 device = device->next;
 509         }
 510
 511         /* allocate memory for a new list member */
 512         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 513         last_comand_pointer = &((*last_cmd)->next);
 514         (*last_cmd)->next = NULL;
 515         (*last_cmd)->type = JTAG_SCAN;
 516
 517         /* allocate memory for dr scan command */
 518         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 519         (*last_cmd)->cmd.scan->ir_scan = 0;
 520         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 521         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 522         (*last_cmd)->cmd.scan->end_state = state;
 523
 524         if (state != -1)
 525                 cmd_queue_end_state = state;
 526
 527         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 528                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 529
 530         if (cmd_queue_end_state == TAP_TLR)
 531                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 532
 533         cmd_queue_cur_state = cmd_queue_end_state;
 534
 535         for (i=0; i < jtag_num_devices; i++)
 536         {
 537                 int found = 0;
 538                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 539
 540                 for (j=0; j < num_fields; j++)
 541                 {
 542                         if (i == fields[j].device)
 543                         {
 544                                 found = 1;
 545                                 scan_size = fields[j].num_bits;
 546                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 547                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 548                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 549                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 550                                 (*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);
 551                                 (*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);
 552                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 553                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 554                         }
 555                 }
 556                 if (!found)
 557                 {
 558                         /* if a device isn't listed, the BYPASS register should be selected */
 559                         if (!jtag_get_device(i)->bypass)
 560                         {
 561                                 ERROR("BUG: no scan data for a device not in BYPASS");
 562                                 exit(-1);
 563                         }
 564
 565                         /* program the scan field to 1 bit length, and ignore it's value */
 566                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 567                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 568                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 569                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 570                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 571                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 572                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 573                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 574                 }
 575                 else
 576                 {
 577                         /* if a device is listed, the BYPASS register must not be selected */
 578                         if (jtag_get_device(i)->bypass)
 579                         {
 580                                 ERROR("BUG: scan data for a device in BYPASS");
 581                                 exit(-1);
 582                         }
 583                 }
 584         }
 585         return ERROR_OK;
 586 }
 587
 588 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 589 {
 590         int i;
 591         jtag_command_t **last_cmd = jtag_get_last_command_p();
 592
 593         if (jtag_trst == 1)
 594         {
 595                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 596                 return ERROR_JTAG_TRST_ASSERTED;
 597         }
 598
 599         /* allocate memory for a new list member */
 600         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 601         last_comand_pointer = &((*last_cmd)->next);
 602         (*last_cmd)->next = NULL;
 603         (*last_cmd)->type = JTAG_SCAN;
 604
 605         /* allocate memory for scan command */
 606         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 607         (*last_cmd)->cmd.scan->ir_scan = 0;
 608         (*last_cmd)->cmd.scan->num_fields = num_fields;
 609         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 610         (*last_cmd)->cmd.scan->end_state = state;
 611
 612         if (state != -1)
 613                 cmd_queue_end_state = state;
 614
 615         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 616                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 617
 618         if (cmd_queue_end_state == TAP_TLR)
 619                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 620
 621         cmd_queue_cur_state = cmd_queue_end_state;
 622
 623         for (i = 0; i < num_fields; i++)
 624         {
 625                 int num_bits = fields[i].num_bits;
 626                 int num_bytes = CEIL(fields[i].num_bits, 8);
 627                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 628                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 629                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 630                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 631                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 632                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 633                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 634                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 635                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 636         }
 637
 638         return ERROR_OK;
 639 }
 640 int jtag_add_statemove(enum tap_state state)
 641 {
 642         jtag_command_t **last_cmd = jtag_get_last_command_p();
 643
 644         if (jtag_trst == 1)
 645         {
 646                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 647                 return ERROR_JTAG_TRST_ASSERTED;
 648         }
 649
 650         /* allocate memory for a new list member */
 651         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 652         last_comand_pointer = &((*last_cmd)->next);
 653         (*last_cmd)->next = NULL;
 654         (*last_cmd)->type = JTAG_STATEMOVE;
 655
 656         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 657         (*last_cmd)->cmd.statemove->end_state = state;
 658
 659         if (state != -1)
 660                 cmd_queue_end_state = state;
 661
 662         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 663                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 664
 665         if (cmd_queue_end_state == TAP_TLR)
 666                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 667
 668         cmd_queue_cur_state = cmd_queue_end_state;
 669
 670         return ERROR_OK;
 671 }
 672
 673 int jtag_add_pathmove(int num_states, enum tap_state *path)
 674 {
 675         jtag_command_t **last_cmd = jtag_get_last_command_p();
 676         int i;
 677
 678         if (jtag_trst == 1)
 679         {
 680                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 681                 return ERROR_JTAG_TRST_ASSERTED;
 682         }
 683
 684         /* the last state has to be a stable state */
 685         if (tap_move_map[path[num_states - 1]] == -1)
 686         {
 687                 ERROR("TAP path doesn't finish in a stable state");
 688                 return ERROR_JTAG_NOT_IMPLEMENTED;
 689         }
 690
 691         if (jtag->support_statemove)
 692         {
 693                 /* allocate memory for a new list member */
 694                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 695                 last_comand_pointer = &((*last_cmd)->next);
 696                 (*last_cmd)->next = NULL;
 697                 (*last_cmd)->type = JTAG_RUNTEST;
 698
 699                 (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 700                 (*last_cmd)->cmd.pathmove->num_states = num_states;
 701                 (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 702
 703                 for (i = 0; i < num_states; i++)
 704                         (*last_cmd)->cmd.pathmove->path[i] = path[i];
 705         }
 706         else
 707         {
 708                 /* validate the desired path, and see if it fits a default path */
 709                 int begin = 0;
 710                 int end = 0;
 711                 int j;
 712
 713                 for (i = 0; i < num_states; i++)
 714                 {
 715                         for (j = i; j < num_states; j++)
 716                         {
 717                                 if (tap_move_map[path[j]] != -1)
 718                                 {
 719                                         end = j;
 720                                         break;
 721                                 }
 722                         }
 723
 724                         if (begin - end <= 7)   /* a default path spans no more than 7 states */
 725                         {
 726                                 jtag_add_statemove(path[end]);
 727                         }
 728                         else
 729                         {
 730                                 ERROR("encountered a TAP path that can't be fulfilled by default paths");
 731                                 return ERROR_JTAG_NOT_IMPLEMENTED;
 732                         }
 733
 734                         i = end;
 735                 }
 736         }
 737
 738         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 739                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 740
 741         if (cmd_queue_end_state == TAP_TLR)
 742                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 743
 744         cmd_queue_cur_state = path[num_states - 1];
 745
 746         return ERROR_OK;
 747 }
 748
 749 int jtag_add_runtest(int num_cycles, enum tap_state state)
 750 {
 751         jtag_command_t **last_cmd = jtag_get_last_command_p();
 752
 753         if (jtag_trst == 1)
 754         {
 755                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 756                 return ERROR_JTAG_TRST_ASSERTED;
 757         }
 758
 759         /* allocate memory for a new list member */
 760         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 761         (*last_cmd)->next = NULL;
 762         last_comand_pointer = &((*last_cmd)->next);
 763         (*last_cmd)->type = JTAG_RUNTEST;
 764
 765         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 766         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 767         (*last_cmd)->cmd.runtest->end_state = state;
 768
 769         if (state != -1)
 770                 cmd_queue_end_state = state;
 771
 772         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 773                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 774
 775         if (cmd_queue_end_state == TAP_TLR)
 776                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 777
 778         cmd_queue_cur_state = cmd_queue_end_state;
 779
 780         return ERROR_OK;
 781 }
 782
 783 int jtag_add_reset(int req_trst, int req_srst)
 784 {
 785         int trst_with_tms = 0;
 786
 787         jtag_command_t **last_cmd = jtag_get_last_command_p();
 788
 789         if (req_trst == -1)
 790                 req_trst = jtag_trst;
 791
 792         if (req_srst == -1)
 793                 req_srst = jtag_srst;
 794
 795         /* Make sure that jtag_reset_config allows the requested reset */
 796         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 797         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 798                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 799
 800         /* if TRST pulls SRST, we reset with TAP T-L-R */
 801         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 802         {
 803                 req_trst = 0;
 804                 trst_with_tms = 1;
 805         }
 806
 807         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 808                 return ERROR_JTAG_RESET_CANT_SRST;
 809
 810         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 811         {
 812                 req_trst = 0;
 813                 trst_with_tms = 1;
 814         }
 815
 816         /* allocate memory for a new list member */
 817         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 818         (*last_cmd)->next = NULL;
 819         last_comand_pointer = &((*last_cmd)->next);
 820         (*last_cmd)->type = JTAG_RESET;
 821
 822         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 823         (*last_cmd)->cmd.reset->trst = req_trst;
 824         (*last_cmd)->cmd.reset->srst = req_srst;
 825
 826         jtag_trst = req_trst;
 827         jtag_srst = req_srst;
 828
 829         if (jtag_srst)
 830                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 831         else
 832                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 833
 834         if (trst_with_tms)
 835         {
 836                 last_cmd = &((*last_cmd)->next);
 837
 838                 /* allocate memory for a new list member */
 839                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 840                 (*last_cmd)->next = NULL;
 841                 last_comand_pointer = &((*last_cmd)->next);
 842                 (*last_cmd)->type = JTAG_STATEMOVE;
 843
 844                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 845                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 846
 847                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 848                 cmd_queue_cur_state = TAP_TLR;
 849                 cmd_queue_end_state = TAP_TLR;
 850
 851                 return ERROR_OK;
 852         }
 853         else
 854         {
 855                 if (jtag_trst)
 856                 {
 857                         cmd_queue_cur_state = TAP_TLR;
 858                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 859                 }
 860         }
 861
 862         return ERROR_OK;
 863 }
 864
 865 int jtag_add_end_state(enum tap_state state)
 866 {
 867         jtag_command_t **last_cmd = jtag_get_last_command_p();
 868
 869         /* allocate memory for a new list member */
 870         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 871         (*last_cmd)->next = NULL;
 872         last_comand_pointer = &((*last_cmd)->next);
 873         (*last_cmd)->type = JTAG_END_STATE;
 874
 875         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 876         (*last_cmd)->cmd.end_state->end_state = state;
 877
 878         if (state != -1)
 879                 cmd_queue_end_state = state;
 880
 881         return ERROR_OK;
 882 }
 883
 884 int jtag_add_sleep(u32 us)
 885 {
 886         jtag_command_t **last_cmd = jtag_get_last_command_p();
 887
 888         /* allocate memory for a new list member */
 889         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 890         (*last_cmd)->next = NULL;
 891         last_comand_pointer = &((*last_cmd)->next);
 892         (*last_cmd)->type = JTAG_SLEEP;
 893
 894         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 895         (*last_cmd)->cmd.sleep->us = us;
 896
 897         return ERROR_OK;
 898 }
 899
 900 int jtag_scan_size(scan_command_t *cmd)
 901 {
 902         int bit_count = 0;
 903         int i;
 904
 905         /* count bits in scan command */
 906         for (i=0; i<cmd->num_fields; i++)
 907         {
 908                 bit_count += cmd->fields[i].num_bits;
 909         }
 910
 911         return bit_count;
 912 }
 913
 914 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 915 {
 916         int bit_count = 0;
 917         int i;
 918
 919         bit_count = jtag_scan_size(cmd);
 920         *buffer = malloc(CEIL(bit_count, 8));
 921
 922         bit_count = 0;
 923
 924         for (i = 0; i < cmd->num_fields; i++)
 925         {
 926                 if (cmd->fields[i].out_value)
 927                 {
 928                         char* char_buf = buf_to_char(cmd->fields[i].out_value, cmd->fields[i].num_bits);
 929                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
 930 #ifdef _DEBUG_JTAG_IO_
 931                         DEBUG("fields[%i].out_value: %s", i, char_buf);
 932 #endif
 933                         free(char_buf);
 934                 }
 935
 936                 bit_count += cmd->fields[i].num_bits;
 937         }
 938
 939         return bit_count;
 940
 941 }
 942
 943 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
 944 {
 945         int i;
 946         int bit_count = 0;
 947         int retval = ERROR_OK;
 948
 949         for (i=0; i < cmd->num_fields; i++)
 950         {
 951                 /* if neither in_value nor in_check_value are specified we don't have to examine this field */
 952                 if (cmd->fields[i].in_value || cmd->fields[i].in_check_value)
 953                 {
 954                         int num_bits = cmd->fields[i].num_bits;
 955
 956                         if (cmd->fields[i].in_value)
 957                         {
 958                                 char *char_buf;
 959                                 buf_set_buf(buffer, bit_count, cmd->fields[i].in_value, 0, num_bits);
 960                                 char_buf = buf_to_char(cmd->fields[i].in_value, num_bits);
 961 #ifdef _DEBUG_JTAG_IO_
 962                                 DEBUG("fields[%i].in_value: %s", i, char_buf);
 963 #endif
 964                                 free(char_buf);
 965                                 if (cmd->fields[i].in_handler)
 966                                 {
 967                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv) != ERROR_OK)
 968                                         {
 969                                                 /* TODO: error reporting */
 970                                                 WARNING("in_handler reported a failed check");
 971                                                 retval = ERROR_JTAG_QUEUE_FAILED;
 972                                         }
 973                                 }
 974                         }
 975
 976                         if (cmd->fields[i].in_check_value)
 977                         {
 978                                 u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
 979                                 if ((cmd->fields[i].in_check_mask && buf_cmp_mask(captured, cmd->fields[i].in_check_value, cmd->fields[i].in_check_mask, num_bits))
 980                                         || (!cmd->fields[i].in_check_mask && buf_cmp(captured, cmd->fields[i].in_check_mask, num_bits)))
 981                                 {
 982                                         char *captured_char = buf_to_char(captured, num_bits);
 983                                         char *in_check_value_char = buf_to_char(cmd->fields[i].in_check_value, num_bits);
 984                                         char *in_check_mask_char = buf_to_char(cmd->fields[i].in_check_mask, num_bits);
 985                                         /* TODO: error reporting */
 986                                         WARNING("value captured during scan didn't pass the requested check: captured: %s check_value: %s check_mask: %s", captured_char, in_check_value_char, in_check_mask_char);
 987                                         retval = ERROR_JTAG_QUEUE_FAILED;
 988                                         free(captured_char);
 989                                         free(in_check_value_char);
 990                                         free(in_check_mask_char);
 991                                 }
 992                                 free(captured);
 993                         }
 994                 }
 995                 bit_count += cmd->fields[i].num_bits;
 996         }
 997
 998         return retval;
 999 }
1000
1001 enum scan_type jtag_scan_type(scan_command_t *cmd)
1002 {
1003         int i;
1004         int type = 0;
1005
1006         for (i=0; i < cmd->num_fields; i++)
1007         {
1008                 if (cmd->fields[i].in_check_value || cmd->fields[i].in_value)
1009                         type |= SCAN_IN;
1010                 if (cmd->fields[i].out_value)
1011                         type |= SCAN_OUT;
1012         }
1013
1014         return type;
1015 }
1016
1017 int jtag_execute_queue(void)
1018 {
1019         int retval;
1020
1021         retval = jtag->execute_queue();
1022
1023         cmd_queue_free();
1024
1025         jtag_command_queue = NULL;
1026         last_comand_pointer = &jtag_command_queue;
1027
1028         return retval;
1029 }
1030
1031 int jtag_cancel_queue(void)
1032 {
1033         cmd_queue_free();
1034         jtag_command_queue = NULL;
1035         last_comand_pointer = &jtag_command_queue;
1036
1037         return ERROR_OK;
1038 }
1039
1040 int jtag_reset_callback(enum jtag_event event, void *priv)
1041 {
1042         jtag_device_t *device = priv;
1043
1044         DEBUG("");
1045
1046         if (event == JTAG_TRST_ASSERTED)
1047         {
1048                 buf_set_ones(device->cur_instr, device->ir_length);
1049                 device->bypass = 1;
1050         }
1051
1052         return ERROR_OK;
1053 }
1054
1055 void jtag_sleep(u32 us)
1056 {
1057         usleep(us);
1058 }
1059
1060 int jtag_validate_chain()
1061 {
1062         jtag_device_t *device = jtag_devices;
1063         int total_ir_length = 0;
1064         u8 *ir_test = NULL;
1065         scan_field_t field;
1066         int chain_pos = 0;
1067
1068         while (device)
1069         {
1070                 total_ir_length += device->ir_length;
1071                 device = device->next;
1072         }
1073
1074         total_ir_length += 2;
1075         ir_test = malloc(CEIL(total_ir_length, 8));
1076         buf_set_ones(ir_test, total_ir_length);
1077
1078         field.device = 0;
1079         field.num_bits = total_ir_length;
1080         field.out_value = ir_test;
1081         field.out_mask = NULL;
1082         field.in_value = ir_test;
1083         field.in_check_value = NULL;
1084         field.in_check_mask = NULL;
1085         field.in_handler = NULL;
1086         field.in_handler_priv = NULL;
1087
1088         jtag_add_plain_ir_scan(1, &field, TAP_TLR);
1089         jtag_execute_queue();
1090
1091         device = jtag_devices;
1092         while (device)
1093         {
1094                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1095                 {
1096                         ERROR("Error validating JTAG scan chain, IR mismatch");
1097                         exit(-1);
1098                 }
1099                 chain_pos += device->ir_length;
1100                 device = device->next;
1101         }
1102
1103         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1104         {
1105                 ERROR("Error validating JTAG scan chain, IR mismatch");
1106                 exit(-1);
1107         }
1108
1109         free(ir_test);
1110
1111         return ERROR_OK;
1112 }
1113
1114 int jtag_register_commands(struct command_context_s *cmd_ctx)
1115 {
1116         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1117                 COMMAND_CONFIG, NULL);
1118         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1119                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1120         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1121                 COMMAND_CONFIG, NULL);
1122         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1123                 COMMAND_CONFIG, NULL);
1124
1125         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1126                 COMMAND_EXEC, "print current scan chain configuration");
1127
1128         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1129                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1130         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1131                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1132         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1133                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1134         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1135                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1136         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1137                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1138         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1139                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1140
1141         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1142                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1143         return ERROR_OK;
1144 }
1145
1146 int jtag_init(struct command_context_s *cmd_ctx)
1147 {
1148         int i;
1149
1150         DEBUG("");
1151
1152         if (jtag_speed == -1)
1153                 jtag_speed = 0;
1154
1155         if (jtag_interface && (jtag_interface[0] != 0))
1156                 /* configuration var 'jtag_interface' is set, and not empty */
1157                 for (i = 0; jtag_interfaces[i]; i++)
1158                 {
1159                         if (strcmp(jtag_interface, jtag_interfaces[i]->name) == 0)
1160                         {
1161                                 jtag_device_t *device;
1162                                 device = jtag_devices;
1163
1164                                 if (jtag_interfaces[i]->init() != ERROR_OK)
1165                                         return ERROR_JTAG_INIT_FAILED;
1166                                 jtag = jtag_interfaces[i];
1167
1168                                 jtag_ir_scan_size = 0;
1169                                 jtag_num_devices = 0;
1170                                 while (device != NULL)
1171                                 {
1172                                         jtag_ir_scan_size += device->ir_length;
1173                                         jtag_num_devices++;
1174                                         device = device->next;
1175                                 }
1176
1177                                 jtag_add_statemove(TAP_TLR);
1178                                 jtag_execute_queue();
1179
1180                                 jtag_validate_chain();
1181
1182                                 return ERROR_OK;
1183                         }
1184                 }
1185
1186         /* no valid interface was found (i.e. the configuration option,
1187          * didn't match one of the compiled-in interfaces
1188          */
1189         ERROR("No valid jtag interface found (%s)", jtag_interface);
1190         jtag = NULL;
1191         return ERROR_JTAG_INVALID_INTERFACE;
1192 }
1193
1194 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1195 {
1196         int i;
1197
1198         /* only if the configuration var isn't overwritten from cmdline */
1199         if (!jtag_interface)
1200         {
1201                 if (args[0] && (args[0][0] != 0))
1202                 {
1203                         for (i=0; jtag_interfaces[i]; i++)
1204                         {
1205                                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1206                                 {
1207                                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1208                                                 exit(-1);
1209
1210                                         jtag_interface = jtag_interfaces[i]->name;
1211
1212                                         return ERROR_OK;
1213                                 }
1214                         }
1215                 }
1216
1217                 /* remember the requested interface name, so we can complain about it later */
1218                 jtag_interface = strdup(args[0]);
1219                 DEBUG("'interface' command didn't specify a valid interface");
1220         }
1221
1222         return ERROR_OK;
1223 }
1224
1225 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1226 {
1227         jtag_device_t **last_device_p = &jtag_devices;
1228
1229         if (*last_device_p)
1230         {
1231                 while ((*last_device_p)->next)
1232                         last_device_p = &((*last_device_p)->next);
1233                 last_device_p = &((*last_device_p)->next);
1234         }
1235
1236         if (argc < 3)
1237                 return ERROR_OK;
1238
1239         *last_device_p = malloc(sizeof(jtag_device_t));
1240         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1241
1242         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1243         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1244         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1245         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1246
1247         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1248         (*last_device_p)->bypass = 1;
1249         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1250
1251         (*last_device_p)->next = NULL;
1252
1253         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1254
1255         jtag_num_devices++;
1256
1257         return ERROR_OK;
1258 }
1259
1260 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1261 {
1262         jtag_device_t *device = jtag_devices;
1263         int device_count = 0;
1264
1265         while (device)
1266         {
1267                 u32 expected, expected_mask, cur_instr;
1268                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1269                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1270                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1271                 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);
1272                 device = device->next;
1273                 device_count++;
1274         }
1275
1276         return ERROR_OK;
1277 }
1278
1279 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1280 {
1281         if (argc >= 1)
1282         {
1283                 if (strcmp(args[0], "none") == 0)
1284                         jtag_reset_config = RESET_NONE;
1285                 else if (strcmp(args[0], "trst_only") == 0)
1286                         jtag_reset_config = RESET_HAS_TRST;
1287                 else if (strcmp(args[0], "srst_only") == 0)
1288                         jtag_reset_config = RESET_HAS_SRST;
1289                 else if (strcmp(args[0], "trst_and_srst") == 0)
1290                         jtag_reset_config = RESET_TRST_AND_SRST;
1291                 else
1292                 {
1293                         ERROR("invalid reset_config argument");
1294                         exit(-1);
1295                 }
1296         }
1297
1298         if (argc >= 2)
1299         {
1300                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1301                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1302                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1303                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1304                 else if (strcmp(args[1], "combined") == 0)
1305                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1306                 else if (strcmp(args[1], "separate") == 0)
1307                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1308                 else
1309                 {
1310                         ERROR("invalid reset_config argument");
1311                         exit(-1);
1312                 }
1313         }
1314
1315         if (argc >= 3)
1316         {
1317                 if (strcmp(args[2], "trst_open_drain") == 0)
1318                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1319                 else if (strcmp(args[2], "trst_push_pull") == 0)
1320                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1321                 else
1322                 {
1323                         ERROR("invalid reset_config argument");
1324                         exit(-1);
1325                 }
1326         }
1327
1328         if (argc >= 4)
1329         {
1330                 if (strcmp(args[3], "srst_push_pull") == 0)
1331                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1332                 else if (strcmp(args[3], "srst_open_drain") == 0)
1333                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1334                 else
1335                 {
1336                         ERROR("invalid reset_config argument");
1337                         exit(-1);
1338                 }
1339         }
1340
1341         return ERROR_OK;
1342 }
1343
1344 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1345 {
1346         if (argc == 0)
1347                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1348
1349         if (argc > 0)
1350         {
1351                 /* this command can be called during CONFIG,
1352                  * in which case jtag isn't initialized */
1353                 if (jtag)
1354                         jtag->speed(strtoul(args[0], NULL, 0));
1355                 else
1356                         jtag_speed = strtoul(args[0], NULL, 0);
1357         }
1358
1359         return ERROR_OK;
1360 }
1361
1362 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1363 {
1364         enum tap_state state;
1365
1366         if (argc < 1)
1367         {
1368                 command_print(cmd_ctx, "usage: endstate <tap_state>");
1369                 return ERROR_OK;
1370         }
1371
1372         for (state = 0; state < 16; state++)
1373         {
1374                 if (strcmp(args[0], tap_state_strings[state]) == 0)
1375                 {
1376                         jtag_add_end_state(state);
1377                         jtag_execute_queue();
1378                 }
1379         }
1380
1381         return ERROR_OK;
1382 }
1383
1384 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1385 {
1386         int trst = -1;
1387         int srst = -1;
1388         char *usage = "usage: jtag_reset <trst> <srst>";
1389         int retval;
1390
1391         if (argc < 1)
1392         {
1393                 command_print(cmd_ctx, usage);
1394                 return ERROR_OK;
1395         }
1396
1397         if (args[0][0] == '1')
1398                 trst = 1;
1399         else if (args[0][0] == '0')
1400                 trst = 0;
1401         else
1402         {
1403                 command_print(cmd_ctx, usage);
1404                 return ERROR_OK;
1405         }
1406
1407         if (args[1][0] == '1')
1408                 srst = 1;
1409         else if (args[1][0] == '0')
1410                 srst = 0;
1411         else
1412         {
1413                 command_print(cmd_ctx, usage);
1414                 return ERROR_OK;
1415         }
1416
1417         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1418         {
1419                 switch (retval)
1420                 {
1421                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1422                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1423                                 break;
1424                         case ERROR_JTAG_RESET_CANT_SRST:
1425                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1426                                 break;
1427                         default:
1428                                 command_print(cmd_ctx, "unknown error");
1429                 }
1430         }
1431         jtag_execute_queue();
1432
1433         return ERROR_OK;
1434 }
1435
1436 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1437 {
1438         if (argc < 1)
1439         {
1440                 command_print(cmd_ctx, "usage: runtest <num_cycles>");
1441                 return ERROR_OK;
1442         }
1443
1444         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1445         jtag_execute_queue();
1446
1447         return ERROR_OK;
1448
1449 }
1450
1451 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1452 {
1453         enum tap_state state;
1454
1455         state = -1;
1456         if (argc == 1)
1457         {
1458                 for (state = 0; state < 16; state++)
1459                 {
1460                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1461                         {
1462                                 break;
1463                         }
1464                 }
1465         }
1466
1467         jtag_add_statemove(state);
1468         jtag_execute_queue();
1469
1470         return ERROR_OK;
1471
1472 }
1473
1474 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1475 {
1476         int i;
1477         scan_field_t *fields;
1478
1479         if ((argc < 2) || (argc % 2))
1480         {
1481                 command_print(cmd_ctx, "usage: irscan <device> <instr> [dev2] [instr2] ...");
1482                 return ERROR_OK;
1483         }
1484
1485         fields = malloc(sizeof(scan_field_t) * argc / 2);
1486
1487         for (i = 0; i < argc / 2; i++)
1488         {
1489                 int device = strtoul(args[i*2], NULL, 0);
1490                 int field_size = jtag_get_device(device)->ir_length;
1491                 fields[i].device = device;
1492                 fields[i].out_value = malloc(CEIL(field_size, 8));
1493                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1494                 fields[i].out_mask = NULL;
1495                 fields[i].in_value = NULL;
1496                 fields[i].in_check_mask = NULL;
1497                 fields[i].in_handler = NULL;
1498                 fields[i].in_handler_priv = NULL;
1499         }
1500
1501         jtag_add_ir_scan(argc / 2, fields, -1);
1502         jtag_execute_queue();
1503
1504         for (i = 0; i < argc / 2; i++)
1505                 free(fields[i].out_value);
1506
1507         free (fields);
1508
1509         return ERROR_OK;
1510 }
1511
1512 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1513 {
1514         scan_field_t *fields;
1515         int num_fields = 0;
1516         int field_count = 0;
1517         var_t *var;
1518         int i, j;
1519
1520         if ((argc < 2) || (argc % 2))
1521         {
1522                 command_print(cmd_ctx, "usage: drscan <device> <var> [dev2] [var2]");
1523                 return ERROR_OK;
1524         }
1525
1526         for (i = 0; i < argc; i+=2)
1527         {
1528                 var = get_var_by_namenum(args[i+1]);
1529                 if (var)
1530                 {
1531                         num_fields += var->num_fields;
1532                 }
1533                 else
1534                 {
1535                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1536                         return ERROR_OK;
1537                 }
1538         }
1539
1540         fields = malloc(sizeof(scan_field_t) * num_fields);
1541
1542         for (i = 0; i < argc; i+=2)
1543         {
1544                 var = get_var_by_namenum(args[i+1]);
1545
1546                 for (j = 0; j < var->num_fields; j++)
1547                 {
1548                         fields[field_count].device = strtol(args[i], NULL, 0);
1549                         fields[field_count].num_bits = var->fields[j].num_bits;
1550                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1551                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1552                         fields[field_count].out_mask = NULL;
1553                         fields[field_count].in_value = fields[field_count].out_value;
1554                         fields[field_count].in_check_mask = NULL;
1555                         fields[field_count].in_check_value = NULL;
1556                         fields[field_count].in_handler = field_le_to_host;
1557                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1558                 }
1559         }
1560
1561         jtag_add_dr_scan(num_fields, fields, -1);
1562         jtag_execute_queue();
1563
1564         for (i = 0; i < argc / 2; i++)
1565                 free(fields[i].out_value);
1566
1567         free(fields);
1568
1569         return ERROR_OK;
1570 }
1571
1572 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1573 {
1574         if (argc == 0)
1575         {
1576                 command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1577                 return ERROR_OK;
1578         }
1579
1580         if (strcmp(args[0], "enable") == 0)
1581         {
1582                 jtag_verify_capture_ir = 1;
1583         }
1584         else if (strcmp(args[0], "disable") == 0)
1585         {
1586                 jtag_verify_capture_ir = 0;
1587         }
1588
1589         return ERROR_OK;
1590 }