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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 #include "config.h"
  21 #include "jtag.h"
  22
  23 #include "command.h"
  24 #include "log.h"
  25 #include "interpreter.h"
  26
  27 #include "stdlib.h"
  28 #include "string.h"
  29 #include <unistd.h>
  30
  31 char* tap_state_strings[16] =
  32 {
  33         "tlr",
  34         "sds", "cd", "sd", "e1d", "pd", "e2d", "ud",
  35         "rti",
  36         "sis", "ci", "si", "e1i", "pi", "e2i", "ui"
  37 };
  38
  39 typedef struct cmd_queue_page_s
  40 {
  41         void *address;
  42         size_t used;
  43         struct cmd_queue_page_s *next;
  44 } cmd_queue_page_t;
  45
  46 #define CMD_QUEUE_PAGE_SIZE (1024 * 1024)
  47 static cmd_queue_page_t *cmd_queue_pages = NULL;
  48
  49 /* tap_move[i][j]: tap movement command to go from state i to state j
  50  * 0: Test-Logic-Reset
  51  * 1: Run-Test/Idle
  52  * 2: Shift-DR
  53  * 3: Pause-DR
  54  * 4: Shift-IR
  55  * 5: Pause-IR
  56  */
  57 u8 tap_move[6][6] =
  58 {
  59 /*        TLR   RTI   SD    PD    SI    PI             */
  60         {0x7f, 0x00, 0x17, 0x0a, 0x1b, 0x16},   /* TLR */
  61         {0x7f, 0x00, 0x25, 0x05, 0x2b, 0x0b},   /* RTI */
  62         {0x7f, 0x31, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
  63         {0x7f, 0x30, 0x20, 0x17, 0x1e, 0x2f},   /* PD  */
  64         {0x7f, 0x31, 0x07, 0x17, 0x00, 0x01},   /* SI  */
  65         {0x7f, 0x30, 0x1c, 0x17, 0x20, 0x2f}    /* PI  */
  66 };
  67
  68 int tap_move_map[16] = {
  69         0, -1, -1,  2, -1,  3, -1, -1,
  70         1, -1, -1,  4, -1,  5, -1, -1
  71 };
  72
  73 tap_transition_t tap_transitions[16] =
  74 {
  75         {TAP_TLR, TAP_RTI},             /* TLR */
  76         {TAP_SIS, TAP_CD},              /* SDS */
  77         {TAP_E1D, TAP_SD},              /* CD  */
  78         {TAP_E1D, TAP_SD},              /* SD  */
  79         {TAP_UD,  TAP_PD},              /* E1D */
  80         {TAP_E2D, TAP_PD},              /* PD  */
  81         {TAP_UD,  TAP_SD},              /* E2D */
  82         {TAP_SDS, TAP_RTI},             /* UD  */
  83         {TAP_SDS, TAP_RTI},             /* RTI */
  84         {TAP_TLR, TAP_CI},              /* SIS */
  85         {TAP_E1I, TAP_SI},              /* CI  */
  86         {TAP_E1I, TAP_SI},              /* SI  */
  87         {TAP_UI,  TAP_PI},              /* E1I */
  88         {TAP_E2I, TAP_PI},              /* PI  */
  89         {TAP_UI,  TAP_SI},              /* E2I */
  90         {TAP_SDS, TAP_RTI}              /* UI  */
  91 };
  92
  93 enum tap_state end_state = TAP_TLR;
  94 enum tap_state cur_state = TAP_TLR;
  95 int jtag_trst = 0;
  96 int jtag_srst = 0;
  97
  98 jtag_command_t *jtag_command_queue = NULL;
  99 jtag_command_t **last_comand_pointer = &jtag_command_queue;
 100 jtag_device_t *jtag_devices = NULL;
 101 int jtag_num_devices = 0;
 102 int jtag_ir_scan_size = 0;
 103 enum reset_types jtag_reset_config = RESET_NONE;
 104 enum tap_state cmd_queue_end_state = TAP_TLR;
 105 enum tap_state cmd_queue_cur_state = TAP_TLR;
 106
 107 int jtag_verify_capture_ir = 1;
 108
 109 /* callbacks to inform high-level handlers about JTAG state changes */
 110 jtag_event_callback_t *jtag_event_callbacks;
 111
 112 /* jtag interfaces (parport, FTDI-USB, TI-USB, ...)
 113  */
 114 #if BUILD_PARPORT == 1
 115         extern jtag_interface_t parport_interface;
 116 #endif
 117
 118 #if BUILD_FTDI2232 == 1
 119         extern jtag_interface_t ftdi2232_interface;
 120 #endif
 121
 122 #if BUILD_FTD2XX == 1
 123         extern jtag_interface_t ftd2xx_interface;
 124 #endif
 125
 126 #if BUILD_AMTJTAGACCEL == 1
 127         extern jtag_interface_t amt_jtagaccel_interface;
 128 #endif
 129
 130 #if BUILD_EP93XX == 1
 131         extern jtag_interface_t ep93xx_interface;
 132 #endif
 133
 134 jtag_interface_t *jtag_interfaces[] = {
 135 #if BUILD_PARPORT == 1
 136         &parport_interface,
 137 #endif
 138 #if BUILD_FTDI2232 == 1
 139         &ftdi2232_interface,
 140 #endif
 141 #if BUILD_FTD2XX == 1
 142         &ftd2xx_interface,
 143 #endif
 144 #if BUILD_AMTJTAGACCEL == 1
 145         &amt_jtagaccel_interface,
 146 #endif
 147 #if BUILD_EP93XX == 1
 148         &ep93xx_interface,
 149 #endif
 150         NULL,
 151 };
 152
 153 jtag_interface_t *jtag = NULL;
 154
 155 /* configuration */
 156 char* jtag_interface = NULL;
 157 int jtag_speed = -1;
 158
 159 /* forward declarations */
 160
 161 /* jtag commands */
 162 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 163 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 164 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 165 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 166
 167 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 168
 169 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 170 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 171 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 172 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 173 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 174 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 175
 176 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 177
 178 int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
 179 {
 180         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 181
 182         if (callback == NULL)
 183         {
 184                 return ERROR_INVALID_ARGUMENTS;
 185         }
 186
 187         if (*callbacks_p)
 188         {
 189                 while ((*callbacks_p)->next)
 190                         callbacks_p = &((*callbacks_p)->next);
 191                 callbacks_p = &((*callbacks_p)->next);
 192         }
 193
 194         (*callbacks_p) = malloc(sizeof(jtag_event_callback_t));
 195         (*callbacks_p)->callback = callback;
 196         (*callbacks_p)->priv = priv;
 197         (*callbacks_p)->next = NULL;
 198
 199         return ERROR_OK;
 200 }
 201
 202 int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
 203 {
 204         jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
 205
 206         if (callback == NULL)
 207         {
 208                 return ERROR_INVALID_ARGUMENTS;
 209         }
 210
 211         while (*callbacks_p)
 212         {
 213                 jtag_event_callback_t **next = &((*callbacks_p)->next);
 214                 if ((*callbacks_p)->callback == callback)
 215                 {
 216                         free(*callbacks_p);
 217                         *callbacks_p = *next;
 218                 }
 219                 callbacks_p = next;
 220         }
 221
 222         return ERROR_OK;
 223 }
 224
 225 int jtag_call_event_callbacks(enum jtag_event event)
 226 {
 227         jtag_event_callback_t *callback = jtag_event_callbacks;
 228
 229         DEBUG("jtag event: %i", event);
 230
 231         while (callback)
 232         {
 233                 callback->callback(event, callback->priv);
 234                 callback = callback->next;
 235         }
 236
 237         return ERROR_OK;
 238 }
 239
 240 /* returns a pointer to the pointer of the last command in queue
 241  * this may be a pointer to the root pointer (jtag_command_queue)
 242  * or to the next member of the last but one command
 243  */
 244 jtag_command_t** jtag_get_last_command_p(void)
 245 {
 246 /*      jtag_command_t *cmd = jtag_command_queue;
 247
 248         if (cmd)
 249                 while (cmd->next)
 250                         cmd = cmd->next;
 251         else
 252                 return &jtag_command_queue;
 253
 254         return &cmd->next;*/
 255
 256         return last_comand_pointer;
 257 }
 258
 259 /* returns a pointer to the n-th device in the scan chain */
 260 jtag_device_t* jtag_get_device(int num)
 261 {
 262         jtag_device_t *device = jtag_devices;
 263         int i = 0;
 264
 265         while (device)
 266         {
 267                 if (num == i)
 268                         return device;
 269                 device = device->next;
 270                 i++;
 271         }
 272
 273         return NULL;
 274 }
 275
 276 void* cmd_queue_alloc(size_t size)
 277 {
 278         cmd_queue_page_t **p_page = &cmd_queue_pages;
 279         int offset;
 280
 281         if (*p_page)
 282         {
 283                 while ((*p_page)->next)
 284                         p_page = &((*p_page)->next);
 285                 if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
 286                         p_page = &((*p_page)->next);
 287         }
 288
 289         if (!*p_page)
 290         {
 291                 *p_page = malloc(sizeof(cmd_queue_page_t));
 292                 (*p_page)->used = 0;
 293                 (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
 294                 (*p_page)->next = NULL;
 295         }
 296
 297         offset = (*p_page)->used;
 298         (*p_page)->used += size;
 299
 300         return ((*p_page)->address) + offset;
 301 }
 302
 303 void cmd_queue_free()
 304 {
 305         cmd_queue_page_t *page = cmd_queue_pages;
 306
 307         while (page)
 308         {
 309                 cmd_queue_page_t *last = page;
 310                 free(page->address);
 311                 page = page->next;
 312                 free(last);
 313         }
 314
 315         cmd_queue_pages = NULL;
 316 }
 317
 318 int jtag_add_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 319 {
 320         jtag_command_t **last_cmd;
 321         jtag_device_t *device;
 322         int i, j;
 323         int scan_size = 0;
 324         /*      int changed = 0; */
 325
 326         if (jtag_trst == 1)
 327         {
 328                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 329                 return ERROR_JTAG_TRST_ASSERTED;
 330         }
 331
 332         /*
 333         for (i=0; i<num_fields; i++)
 334         {
 335                 device = jtag_get_device(fields[i].device);
 336                 if (device)
 337                 {
 338                         if (buf_cmp(device->cur_instr, fields[i].out_value, device->ir_length))
 339                                 changed = 1;
 340                 }
 341                 else
 342                 {
 343                         ERROR("inexistant device specified for ir scan");
 344                         return ERROR_INVALID_ARGUMENTS;
 345                 }
 346         }
 347
 348         if (!changed)
 349                 return ERROR_OK;
 350         */
 351
 352         last_cmd = jtag_get_last_command_p();
 353
 354         /* allocate memory for a new list member */
 355         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 356         (*last_cmd)->next = NULL;
 357         last_comand_pointer = &((*last_cmd)->next);
 358         (*last_cmd)->type = JTAG_SCAN;
 359
 360         /* allocate memory for ir scan command */
 361         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 362         (*last_cmd)->cmd.scan->ir_scan = 1;
 363         (*last_cmd)->cmd.scan->num_fields = jtag_num_devices;   /* one field per device */
 364         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(jtag_num_devices * sizeof(scan_field_t));
 365         (*last_cmd)->cmd.scan->end_state = state;
 366
 367         if (state != -1)
 368                 cmd_queue_end_state = state;
 369
 370         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 371                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 372
 373         if (cmd_queue_end_state == TAP_TLR)
 374                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 375
 376         cmd_queue_cur_state = cmd_queue_end_state;
 377
 378         for (i=0; i < jtag_num_devices; i++)
 379         {
 380                 int found = 0;
 381                 device = jtag_get_device(i);
 382                 scan_size = device->ir_length;
 383                 (*last_cmd)->cmd.scan->fields[i].device = i;
 384                 (*last_cmd)->cmd.scan->fields[i].num_bits = scan_size;
 385                 (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
 386                 if (jtag_verify_capture_ir)
 387                 {
 388                         (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(device->expected, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 389                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(device->expected_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 390                 }
 391                 else
 392                 {
 393                         (*last_cmd)->cmd.scan->fields[i].in_check_value = NULL;
 394                         (*last_cmd)->cmd.scan->fields[i].in_check_mask = NULL;
 395                 }
 396                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 397                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 398
 399                 /* search the list */
 400                 for (j=0; j < num_fields; j++)
 401                 {
 402                         if (i == fields[j].device)
 403                         {
 404                                 found = 1;
 405                                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 406                                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 407
 408                                 device->bypass = 0;
 409                                 break;
 410                         }
 411                 }
 412
 413                 if (!found)
 414                 {
 415                         /* if a device isn't listed, set it to BYPASS */
 416                         (*last_cmd)->cmd.scan->fields[i].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 417                         (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
 418                         device->bypass = 1;
 419
 420                 }
 421
 422                 /* update device information */
 423                 buf_cpy((*last_cmd)->cmd.scan->fields[i].out_value, jtag_get_device(i)->cur_instr, scan_size);
 424         }
 425
 426         return ERROR_OK;
 427 }
 428
 429 int jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 430 {
 431         jtag_command_t **last_cmd;
 432         int i;
 433
 434         if (jtag_trst == 1)
 435         {
 436                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 437                 return ERROR_JTAG_TRST_ASSERTED;
 438         }
 439
 440         last_cmd = jtag_get_last_command_p();
 441
 442         /* allocate memory for a new list member */
 443         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 444         (*last_cmd)->next = NULL;
 445         last_comand_pointer = &((*last_cmd)->next);
 446         (*last_cmd)->type = JTAG_SCAN;
 447
 448         /* allocate memory for ir scan command */
 449         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 450         (*last_cmd)->cmd.scan->ir_scan = 1;
 451         (*last_cmd)->cmd.scan->num_fields = num_fields;
 452         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 453         (*last_cmd)->cmd.scan->end_state = state;
 454
 455         if (state != -1)
 456                 cmd_queue_end_state = state;
 457
 458         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 459                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 460
 461         if (cmd_queue_end_state == TAP_TLR)
 462                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 463
 464         cmd_queue_cur_state = cmd_queue_end_state;
 465
 466         for (i = 0; i < num_fields; i++)
 467         {
 468                 int num_bits = fields[i].num_bits;
 469                 int num_bytes = CEIL(fields[i].num_bits, 8);
 470                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 471                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 472                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 473                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 474                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 475                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 476                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 477                 (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
 478                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
 479         }
 480         return ERROR_OK;
 481 }
 482
 483 int jtag_add_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 484 {
 485         int i, j;
 486         int bypass_devices = 0;
 487         int field_count = 0;
 488         jtag_command_t **last_cmd = jtag_get_last_command_p();
 489         jtag_device_t *device = jtag_devices;
 490         int scan_size;
 491
 492         if (jtag_trst == 1)
 493         {
 494                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 495                 return ERROR_JTAG_TRST_ASSERTED;
 496         }
 497
 498         /* count devices in bypass */
 499         while (device)
 500         {
 501                 if (device->bypass)
 502                         bypass_devices++;
 503                 device = device->next;
 504         }
 505
 506         /* allocate memory for a new list member */
 507         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 508         last_comand_pointer = &((*last_cmd)->next);
 509         (*last_cmd)->next = NULL;
 510         (*last_cmd)->type = JTAG_SCAN;
 511
 512         /* allocate memory for dr scan command */
 513         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 514         (*last_cmd)->cmd.scan->ir_scan = 0;
 515         (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
 516         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
 517         (*last_cmd)->cmd.scan->end_state = state;
 518
 519         if (state != -1)
 520                 cmd_queue_end_state = state;
 521
 522         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 523                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 524
 525         if (cmd_queue_end_state == TAP_TLR)
 526                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 527
 528         cmd_queue_cur_state = cmd_queue_end_state;
 529
 530         for (i=0; i < jtag_num_devices; i++)
 531         {
 532                 int found = 0;
 533                 (*last_cmd)->cmd.scan->fields[field_count].device = i;
 534
 535                 for (j=0; j < num_fields; j++)
 536                 {
 537                         if (i == fields[j].device)
 538                         {
 539                                 found = 1;
 540                                 scan_size = fields[j].num_bits;
 541                                 (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
 542                                 (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 543                                 (*last_cmd)->cmd.scan->fields[field_count].out_mask = buf_cpy(fields[j].out_mask, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
 544                                 (*last_cmd)->cmd.scan->fields[field_count].in_value = fields[j].in_value;
 545                                 (*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);
 546                                 (*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);
 547                                 (*last_cmd)->cmd.scan->fields[field_count].in_handler = fields[j].in_handler;
 548                                 (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = fields[j].in_handler_priv;
 549                         }
 550                 }
 551                 if (!found)
 552                 {
 553                         /* if a device isn't listed, the BYPASS register should be selected */
 554                         if (!jtag_get_device(i)->bypass)
 555                         {
 556                                 ERROR("BUG: no scan data for a device not in BYPASS");
 557                                 exit(-1);
 558                         }
 559
 560                         /* program the scan field to 1 bit length, and ignore it's value */
 561                         (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
 562                         (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
 563                         (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
 564                         (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
 565                         (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
 566                         (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
 567                         (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
 568                         (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
 569                 }
 570                 else
 571                 {
 572                         /* if a device is listed, the BYPASS register must not be selected */
 573                         if (jtag_get_device(i)->bypass)
 574                         {
 575                                 ERROR("BUG: scan data for a device in BYPASS");
 576                                 exit(-1);
 577                         }
 578                 }
 579         }
 580         return ERROR_OK;
 581 }
 582
 583 int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
 584 {
 585         int i;
 586         jtag_command_t **last_cmd = jtag_get_last_command_p();
 587
 588         if (jtag_trst == 1)
 589         {
 590                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 591                 return ERROR_JTAG_TRST_ASSERTED;
 592         }
 593
 594         /* allocate memory for a new list member */
 595         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 596         last_comand_pointer = &((*last_cmd)->next);
 597         (*last_cmd)->next = NULL;
 598         (*last_cmd)->type = JTAG_SCAN;
 599
 600         /* allocate memory for scan command */
 601         (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
 602         (*last_cmd)->cmd.scan->ir_scan = 0;
 603         (*last_cmd)->cmd.scan->num_fields = num_fields;
 604         (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(num_fields * sizeof(scan_field_t));
 605         (*last_cmd)->cmd.scan->end_state = state;
 606
 607         if (state != -1)
 608                 cmd_queue_end_state = state;
 609
 610         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 611                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 612
 613         if (cmd_queue_end_state == TAP_TLR)
 614                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 615
 616         cmd_queue_cur_state = cmd_queue_end_state;
 617
 618         for (i = 0; i < num_fields; i++)
 619         {
 620                 int num_bits = fields[i].num_bits;
 621                 int num_bytes = CEIL(fields[i].num_bits, 8);
 622                 (*last_cmd)->cmd.scan->fields[i].device = fields[i].device;
 623                 (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
 624                 (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits);
 625                 (*last_cmd)->cmd.scan->fields[i].out_mask = buf_cpy(fields[i].out_mask, cmd_queue_alloc(num_bytes), num_bits);
 626                 (*last_cmd)->cmd.scan->fields[i].in_value = fields[i].in_value;
 627                 (*last_cmd)->cmd.scan->fields[i].in_check_value = buf_cpy(fields[i].in_check_value, cmd_queue_alloc(num_bytes), num_bits);
 628                 (*last_cmd)->cmd.scan->fields[i].in_check_mask = buf_cpy(fields[i].in_check_mask, cmd_queue_alloc(num_bytes), num_bits);
 629                 (*last_cmd)->cmd.scan->fields[i].in_handler = fields[i].in_handler;
 630                 (*last_cmd)->cmd.scan->fields[i].in_handler_priv = fields[i].in_handler_priv;
 631         }
 632
 633         return ERROR_OK;
 634 }
 635 int jtag_add_statemove(enum tap_state state)
 636 {
 637         jtag_command_t **last_cmd = jtag_get_last_command_p();
 638
 639         if (jtag_trst == 1)
 640         {
 641                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 642                 return ERROR_JTAG_TRST_ASSERTED;
 643         }
 644
 645         /* allocate memory for a new list member */
 646         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 647         last_comand_pointer = &((*last_cmd)->next);
 648         (*last_cmd)->next = NULL;
 649         (*last_cmd)->type = JTAG_STATEMOVE;
 650
 651         (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 652         (*last_cmd)->cmd.statemove->end_state = state;
 653
 654         if (state != -1)
 655                 cmd_queue_end_state = state;
 656
 657         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 658                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 659
 660         if (cmd_queue_end_state == TAP_TLR)
 661                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 662
 663         cmd_queue_cur_state = cmd_queue_end_state;
 664
 665         return ERROR_OK;
 666 }
 667
 668 int jtag_add_pathmove(int num_states, enum tap_state *path)
 669 {
 670         jtag_command_t **last_cmd = jtag_get_last_command_p();
 671         int i;
 672
 673         if (jtag_trst == 1)
 674         {
 675                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 676                 return ERROR_JTAG_TRST_ASSERTED;
 677         }
 678
 679         /* the last state has to be a stable state */
 680         if (tap_move_map[path[num_states - 1]] == -1)
 681         {
 682                 ERROR("TAP path doesn't finish in a stable state");
 683                 return ERROR_JTAG_NOT_IMPLEMENTED;
 684         }
 685
 686         if (jtag->support_statemove)
 687         {
 688                 /* allocate memory for a new list member */
 689                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 690                 last_comand_pointer = &((*last_cmd)->next);
 691                 (*last_cmd)->next = NULL;
 692                 (*last_cmd)->type = JTAG_RUNTEST;
 693
 694                 (*last_cmd)->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t));
 695                 (*last_cmd)->cmd.pathmove->num_states = num_states;
 696                 (*last_cmd)->cmd.pathmove->path = cmd_queue_alloc(sizeof(enum tap_state) * num_states);
 697
 698                 for (i = 0; i < num_states; i++)
 699                         (*last_cmd)->cmd.pathmove->path[i] = path[i];
 700         }
 701         else
 702         {
 703                 /* validate the desired path, and see if it fits a default path */
 704                 int begin = 0;
 705                 int end = 0;
 706                 int j;
 707
 708                 for (i = 0; i < num_states; i++)
 709                 {
 710                         for (j = i; j < num_states; j++)
 711                         {
 712                                 if (tap_move_map[path[j]] != -1)
 713                                 {
 714                                         end = j;
 715                                         break;
 716                                 }
 717                         }
 718
 719                         if (begin - end <= 7)   /* a default path spans no more than 7 states */
 720                         {
 721                                 jtag_add_statemove(path[end]);
 722                         }
 723                         else
 724                         {
 725                                 ERROR("encountered a TAP path that can't be fulfilled by default paths");
 726                                 return ERROR_JTAG_NOT_IMPLEMENTED;
 727                         }
 728
 729                         i = end;
 730                 }
 731         }
 732
 733         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 734                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 735
 736         if (cmd_queue_end_state == TAP_TLR)
 737                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 738
 739         cmd_queue_cur_state = path[num_states - 1];
 740
 741         return ERROR_OK;
 742 }
 743
 744 int jtag_add_runtest(int num_cycles, enum tap_state state)
 745 {
 746         jtag_command_t **last_cmd = jtag_get_last_command_p();
 747
 748         if (jtag_trst == 1)
 749         {
 750                 WARNING("JTAG command queued, while TRST is low (TAP in reset)");
 751                 return ERROR_JTAG_TRST_ASSERTED;
 752         }
 753
 754         /* allocate memory for a new list member */
 755         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 756         (*last_cmd)->next = NULL;
 757         last_comand_pointer = &((*last_cmd)->next);
 758         (*last_cmd)->type = JTAG_RUNTEST;
 759
 760         (*last_cmd)->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t));
 761         (*last_cmd)->cmd.runtest->num_cycles = num_cycles;
 762         (*last_cmd)->cmd.runtest->end_state = state;
 763
 764         if (state != -1)
 765                 cmd_queue_end_state = state;
 766
 767         if (cmd_queue_cur_state == TAP_TLR && cmd_queue_end_state != TAP_TLR)
 768                 jtag_call_event_callbacks(JTAG_TRST_RELEASED);
 769
 770         if (cmd_queue_end_state == TAP_TLR)
 771                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 772
 773         cmd_queue_cur_state = cmd_queue_end_state;
 774
 775         return ERROR_OK;
 776 }
 777
 778 int jtag_add_reset(int req_trst, int req_srst)
 779 {
 780         int trst_with_tms = 0;
 781
 782         jtag_command_t **last_cmd = jtag_get_last_command_p();
 783
 784         if (req_trst == -1)
 785                 req_trst = jtag_trst;
 786
 787         if (req_srst == -1)
 788                 req_srst = jtag_srst;
 789
 790         /* Make sure that jtag_reset_config allows the requested reset */
 791         /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
 792         if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (req_trst == 0))
 793                 return ERROR_JTAG_RESET_WOULD_ASSERT_TRST;
 794
 795         /* if TRST pulls SRST, we reset with TAP T-L-R */
 796         if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_trst == 1)) && (req_srst == 0))
 797         {
 798                 req_trst = 0;
 799                 trst_with_tms = 1;
 800         }
 801
 802         if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
 803                 return ERROR_JTAG_RESET_CANT_SRST;
 804
 805         if (req_trst && !(jtag_reset_config & RESET_HAS_TRST))
 806         {
 807                 req_trst = 0;
 808                 trst_with_tms = 1;
 809         }
 810
 811         /* allocate memory for a new list member */
 812         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 813         (*last_cmd)->next = NULL;
 814         last_comand_pointer = &((*last_cmd)->next);
 815         (*last_cmd)->type = JTAG_RESET;
 816
 817         (*last_cmd)->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t));
 818         (*last_cmd)->cmd.reset->trst = req_trst;
 819         (*last_cmd)->cmd.reset->srst = req_srst;
 820
 821         jtag_trst = req_trst;
 822         jtag_srst = req_srst;
 823
 824         if (jtag_srst)
 825                 jtag_call_event_callbacks(JTAG_SRST_ASSERTED);
 826         else
 827                 jtag_call_event_callbacks(JTAG_SRST_RELEASED);
 828
 829         if (trst_with_tms)
 830         {
 831                 last_cmd = &((*last_cmd)->next);
 832
 833                 /* allocate memory for a new list member */
 834                 *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 835                 (*last_cmd)->next = NULL;
 836                 last_comand_pointer = &((*last_cmd)->next);
 837                 (*last_cmd)->type = JTAG_STATEMOVE;
 838
 839                 (*last_cmd)->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t));
 840                 (*last_cmd)->cmd.statemove->end_state = TAP_TLR;
 841
 842                 jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 843                 cmd_queue_cur_state = TAP_TLR;
 844                 cmd_queue_end_state = TAP_TLR;
 845
 846                 return ERROR_OK;
 847         }
 848         else
 849         {
 850                 if (jtag_trst)
 851                 {
 852                         cmd_queue_cur_state = TAP_TLR;
 853                         jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
 854                 }
 855         }
 856
 857         return ERROR_OK;
 858 }
 859
 860 int jtag_add_end_state(enum tap_state state)
 861 {
 862         jtag_command_t **last_cmd = jtag_get_last_command_p();
 863
 864         /* allocate memory for a new list member */
 865         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 866         (*last_cmd)->next = NULL;
 867         last_comand_pointer = &((*last_cmd)->next);
 868         (*last_cmd)->type = JTAG_END_STATE;
 869
 870         (*last_cmd)->cmd.end_state = cmd_queue_alloc(sizeof(end_state_command_t));
 871         (*last_cmd)->cmd.end_state->end_state = state;
 872
 873         if (state != -1)
 874                 cmd_queue_end_state = state;
 875
 876         return ERROR_OK;
 877 }
 878
 879 int jtag_add_sleep(u32 us)
 880 {
 881         jtag_command_t **last_cmd = jtag_get_last_command_p();
 882
 883         /* allocate memory for a new list member */
 884         *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
 885         (*last_cmd)->next = NULL;
 886         last_comand_pointer = &((*last_cmd)->next);
 887         (*last_cmd)->type = JTAG_SLEEP;
 888
 889         (*last_cmd)->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t));
 890         (*last_cmd)->cmd.sleep->us = us;
 891
 892         return ERROR_OK;
 893 }
 894
 895 int jtag_scan_size(scan_command_t *cmd)
 896 {
 897         int bit_count = 0;
 898         int i;
 899
 900         /* count bits in scan command */
 901         for (i=0; i<cmd->num_fields; i++)
 902         {
 903                 bit_count += cmd->fields[i].num_bits;
 904         }
 905
 906         return bit_count;
 907 }
 908
 909 int jtag_build_buffer(scan_command_t *cmd, u8 **buffer)
 910 {
 911         int bit_count = 0;
 912         int i;
 913
 914         bit_count = jtag_scan_size(cmd);
 915         *buffer = malloc(CEIL(bit_count, 8));
 916
 917         bit_count = 0;
 918
 919         for (i = 0; i < cmd->num_fields; i++)
 920         {
 921                 if (cmd->fields[i].out_value)
 922                 {
 923                         char* char_buf = buf_to_char(cmd->fields[i].out_value, cmd->fields[i].num_bits);
 924                         buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
 925 #ifdef _DEBUG_JTAG_IO_
 926                         DEBUG("fields[%i].out_value: %s", i, char_buf);
 927 #endif
 928                         free(char_buf);
 929                 }
 930
 931                 bit_count += cmd->fields[i].num_bits;
 932         }
 933
 934         return bit_count;
 935
 936 }
 937
 938 int jtag_read_buffer(u8 *buffer, scan_command_t *cmd)
 939 {
 940         int i;
 941         int bit_count = 0;
 942         int retval = ERROR_OK;
 943
 944         for (i=0; i < cmd->num_fields; i++)
 945         {
 946                 /* if neither in_value nor in_check_value are specified we don't have to examine this field */
 947                 if (cmd->fields[i].in_value || cmd->fields[i].in_check_value)
 948                 {
 949                         int num_bits = cmd->fields[i].num_bits;
 950
 951                         if (cmd->fields[i].in_value)
 952                         {
 953                                 char *char_buf;
 954                                 buf_set_buf(buffer, bit_count, cmd->fields[i].in_value, 0, num_bits);
 955                                 char_buf = buf_to_char(cmd->fields[i].in_value, num_bits);
 956 #ifdef _DEBUG_JTAG_IO_
 957                                 DEBUG("fields[%i].in_value: %s", i, char_buf);
 958 #endif
 959                                 free(char_buf);
 960                                 if (cmd->fields[i].in_handler)
 961                                 {
 962                                         if (cmd->fields[i].in_handler(cmd->fields[i].in_value, cmd->fields[i].in_handler_priv) != ERROR_OK)
 963                                         {
 964                                                 /* TODO: error reporting */
 965                                                 WARNING("in_handler reported a failed check");
 966                                                 retval = ERROR_JTAG_QUEUE_FAILED;
 967                                         }
 968                                 }
 969                         }
 970
 971                         if (cmd->fields[i].in_check_value)
 972                         {
 973                                 u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
 974                                 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))
 975                                         || (!cmd->fields[i].in_check_mask && buf_cmp(captured, cmd->fields[i].in_check_mask, num_bits)))
 976                                 {
 977                                         char *captured_char = buf_to_char(captured, num_bits);
 978                                         char *in_check_value_char = buf_to_char(cmd->fields[i].in_check_value, num_bits);
 979                                         char *in_check_mask_char = buf_to_char(cmd->fields[i].in_check_mask, num_bits);
 980                                         /* TODO: error reporting */
 981                                         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);
 982                                         retval = ERROR_JTAG_QUEUE_FAILED;
 983                                         free(captured_char);
 984                                         free(in_check_value_char);
 985                                         free(in_check_mask_char);
 986                                 }
 987                                 free(captured);
 988                         }
 989                 }
 990                 bit_count += cmd->fields[i].num_bits;
 991         }
 992
 993         return retval;
 994 }
 995
 996 enum scan_type jtag_scan_type(scan_command_t *cmd)
 997 {
 998         int i;
 999         int type = 0;
1000
1001         for (i=0; i < cmd->num_fields; i++)
1002         {
1003                 if (cmd->fields[i].in_check_value || cmd->fields[i].in_value)
1004                         type |= SCAN_IN;
1005                 if (cmd->fields[i].out_value)
1006                         type |= SCAN_OUT;
1007         }
1008
1009         return type;
1010 }
1011
1012 int jtag_execute_queue(void)
1013 {
1014         int retval;
1015
1016         retval = jtag->execute_queue();
1017
1018         cmd_queue_free();
1019
1020         jtag_command_queue = NULL;
1021         last_comand_pointer = &jtag_command_queue;
1022
1023         return retval;
1024 }
1025
1026 int jtag_cancel_queue(void)
1027 {
1028         cmd_queue_free();
1029         jtag_command_queue = NULL;
1030         last_comand_pointer = &jtag_command_queue;
1031
1032         return ERROR_OK;
1033 }
1034
1035 int jtag_reset_callback(enum jtag_event event, void *priv)
1036 {
1037         jtag_device_t *device = priv;
1038
1039         DEBUG("");
1040
1041         if (event == JTAG_TRST_ASSERTED)
1042         {
1043                 buf_set_ones(device->cur_instr, device->ir_length);
1044                 device->bypass = 1;
1045         }
1046
1047         return ERROR_OK;
1048 }
1049
1050 void jtag_sleep(u32 us)
1051 {
1052         usleep(us);
1053 }
1054
1055 int jtag_validate_chain()
1056 {
1057         jtag_device_t *device = jtag_devices;
1058         int total_ir_length = 0;
1059         u8 *ir_test = NULL;
1060         scan_field_t field;
1061         int chain_pos = 0;
1062
1063         while (device)
1064         {
1065                 total_ir_length += device->ir_length;
1066                 device = device->next;
1067         }
1068
1069         total_ir_length += 2;
1070         ir_test = malloc(CEIL(total_ir_length, 8));
1071         buf_set_ones(ir_test, total_ir_length);
1072
1073         field.device = 0;
1074         field.num_bits = total_ir_length;
1075         field.out_value = ir_test;
1076         field.out_mask = NULL;
1077         field.in_value = ir_test;
1078         field.in_check_value = NULL;
1079         field.in_check_mask = NULL;
1080         field.in_handler = NULL;
1081         field.in_handler_priv = NULL;
1082
1083         jtag_add_plain_ir_scan(1, &field, TAP_TLR);
1084         jtag_execute_queue();
1085
1086         device = jtag_devices;
1087         while (device)
1088         {
1089                 if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
1090                 {
1091                         ERROR("Error validating JTAG scan chain, IR mismatch");
1092                         exit(-1);
1093                 }
1094                 chain_pos += device->ir_length;
1095                 device = device->next;
1096         }
1097
1098         if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
1099         {
1100                 ERROR("Error validating JTAG scan chain, IR mismatch");
1101                 exit(-1);
1102         }
1103
1104         free(ir_test);
1105
1106         return ERROR_OK;
1107 }
1108
1109 int jtag_register_commands(struct command_context_s *cmd_ctx)
1110 {
1111         register_command(cmd_ctx, NULL, "interface", handle_interface_command,
1112                 COMMAND_CONFIG, NULL);
1113         register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
1114                 COMMAND_ANY, "set jtag speed (if supported) <speed>");
1115         register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command,
1116                 COMMAND_CONFIG, NULL);
1117         register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command,
1118                 COMMAND_CONFIG, NULL);
1119
1120         register_command(cmd_ctx, NULL, "scan_chain", handle_scan_chain_command,
1121                 COMMAND_EXEC, "print current scan chain configuration");
1122
1123         register_command(cmd_ctx, NULL, "endstate", handle_endstate_command,
1124                 COMMAND_EXEC, "finish JTAG operations in <tap_state>");
1125         register_command(cmd_ctx, NULL, "jtag_reset", handle_jtag_reset_command,
1126                 COMMAND_EXEC, "toggle reset lines <trst> <srst>");
1127         register_command(cmd_ctx, NULL, "runtest", handle_runtest_command,
1128                 COMMAND_EXEC, "move to Run-Test/Idle, and execute <num_cycles>");
1129         register_command(cmd_ctx, NULL, "statemove", handle_statemove_command,
1130                 COMMAND_EXEC, "move to current endstate or [tap_state]");
1131         register_command(cmd_ctx, NULL, "irscan", handle_irscan_command,
1132                 COMMAND_EXEC, "execute IR scan <device> <instr> [dev2] [instr2] ...");
1133         register_command(cmd_ctx, NULL, "drscan", handle_drscan_command,
1134                 COMMAND_EXEC, "execute DR scan <device> <var> [dev2] [var2] ...");
1135
1136         register_command(cmd_ctx, NULL, "verify_ircapture", handle_verify_ircapture_command,
1137                 COMMAND_ANY, "verify value captured during Capture-IR <enable|disable>");
1138         return ERROR_OK;
1139 }
1140
1141 int jtag_init(struct command_context_s *cmd_ctx)
1142 {
1143         int i;
1144
1145         DEBUG("");
1146
1147         if (jtag_speed == -1)
1148                 jtag_speed = 0;
1149
1150         if (jtag_interface && (jtag_interface[0] != 0))
1151                 /* configuration var 'jtag_interface' is set, and not empty */
1152                 for (i = 0; jtag_interfaces[i]; i++)
1153                 {
1154                         if (strcmp(jtag_interface, jtag_interfaces[i]->name) == 0)
1155                         {
1156                                 jtag_device_t *device;
1157                                 device = jtag_devices;
1158
1159                                 if (jtag_interfaces[i]->init() != ERROR_OK)
1160                                         return ERROR_JTAG_INIT_FAILED;
1161                                 jtag = jtag_interfaces[i];
1162
1163                                 jtag_ir_scan_size = 0;
1164                                 jtag_num_devices = 0;
1165                                 while (device != NULL)
1166                                 {
1167                                         jtag_ir_scan_size += device->ir_length;
1168                                         jtag_num_devices++;
1169                                         device = device->next;
1170                                 }
1171
1172                                 jtag_add_statemove(TAP_TLR);
1173                                 jtag_execute_queue();
1174
1175                                 jtag_validate_chain();
1176
1177                                 return ERROR_OK;
1178                         }
1179                 }
1180
1181         /* no valid interface was found (i.e. the configuration option,
1182          * didn't match one of the compiled-in interfaces
1183          */
1184         ERROR("No valid jtag interface found (%s)", jtag_interface);
1185         jtag = NULL;
1186         return ERROR_JTAG_INVALID_INTERFACE;
1187 }
1188
1189 int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1190 {
1191         int i;
1192
1193         /* only if the configuration var isn't overwritten from cmdline */
1194         if (!jtag_interface)
1195         {
1196                 if (args[0] && (args[0][0] != 0))
1197                 {
1198                         for (i=0; jtag_interfaces[i]; i++)
1199                         {
1200                                 if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
1201                                 {
1202                                         if (jtag_interfaces[i]->register_commands(cmd_ctx) != ERROR_OK)
1203                                                 exit(-1);
1204
1205                                         jtag_interface = jtag_interfaces[i]->name;
1206
1207                                         return ERROR_OK;
1208                                 }
1209                         }
1210                 }
1211
1212                 /* remember the requested interface name, so we can complain about it later */
1213                 jtag_interface = strdup(args[0]);
1214                 DEBUG("'interface' command didn't specify a valid interface");
1215         }
1216
1217         return ERROR_OK;
1218 }
1219
1220 int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1221 {
1222         jtag_device_t **last_device_p = &jtag_devices;
1223
1224         if (*last_device_p)
1225         {
1226                 while ((*last_device_p)->next)
1227                         last_device_p = &((*last_device_p)->next);
1228                 last_device_p = &((*last_device_p)->next);
1229         }
1230
1231         if (argc < 3)
1232                 return ERROR_OK;
1233
1234         *last_device_p = malloc(sizeof(jtag_device_t));
1235         (*last_device_p)->ir_length = strtoul(args[0], NULL, 0);
1236
1237         (*last_device_p)->expected = malloc((*last_device_p)->ir_length);
1238         buf_set_u32((*last_device_p)->expected, 0, (*last_device_p)->ir_length, strtoul(args[1], NULL, 0));
1239         (*last_device_p)->expected_mask = malloc((*last_device_p)->ir_length);
1240         buf_set_u32((*last_device_p)->expected_mask, 0, (*last_device_p)->ir_length, strtoul(args[2], NULL, 0));
1241
1242         (*last_device_p)->cur_instr = malloc((*last_device_p)->ir_length);
1243         (*last_device_p)->bypass = 1;
1244         buf_set_ones((*last_device_p)->cur_instr, (*last_device_p)->ir_length);
1245
1246         (*last_device_p)->next = NULL;
1247
1248         jtag_register_event_callback(jtag_reset_callback, (*last_device_p));
1249
1250         jtag_num_devices++;
1251
1252         return ERROR_OK;
1253 }
1254
1255 int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1256 {
1257         jtag_device_t *device = jtag_devices;
1258         int device_count = 0;
1259
1260         while (device)
1261         {
1262                 u32 expected, expected_mask, cur_instr;
1263                 expected = buf_get_u32(device->expected, 0, device->ir_length);
1264                 expected_mask = buf_get_u32(device->expected_mask, 0, device->ir_length);
1265                 cur_instr = buf_get_u32(device->cur_instr, 0, device->ir_length);
1266                 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);
1267                 device = device->next;
1268                 device_count++;
1269         }
1270
1271         return ERROR_OK;
1272 }
1273
1274 int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1275 {
1276         if (argc >= 1)
1277         {
1278                 if (strcmp(args[0], "none") == 0)
1279                         jtag_reset_config = RESET_NONE;
1280                 else if (strcmp(args[0], "trst_only") == 0)
1281                         jtag_reset_config = RESET_HAS_TRST;
1282                 else if (strcmp(args[0], "srst_only") == 0)
1283                         jtag_reset_config = RESET_HAS_SRST;
1284                 else if (strcmp(args[0], "trst_and_srst") == 0)
1285                         jtag_reset_config = RESET_TRST_AND_SRST;
1286                 else
1287                 {
1288                         ERROR("invalid reset_config argument");
1289                         exit(-1);
1290                 }
1291         }
1292
1293         if (argc >= 2)
1294         {
1295                 if (strcmp(args[1], "srst_pulls_trst") == 0)
1296                         jtag_reset_config |= RESET_SRST_PULLS_TRST;
1297                 else if (strcmp(args[1], "trst_pulls_srst") == 0)
1298                         jtag_reset_config |= RESET_TRST_PULLS_SRST;
1299                 else if (strcmp(args[1], "combined") == 0)
1300                         jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
1301                 else if (strcmp(args[1], "separate") == 0)
1302                         jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
1303                 else
1304                 {
1305                         ERROR("invalid reset_config argument");
1306                         exit(-1);
1307                 }
1308         }
1309
1310         if (argc >= 3)
1311         {
1312                 if (strcmp(args[2], "trst_open_drain") == 0)
1313                         jtag_reset_config |= RESET_TRST_OPEN_DRAIN;
1314                 else if (strcmp(args[2], "trst_push_pull") == 0)
1315                         jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
1316                 else
1317                 {
1318                         ERROR("invalid reset_config argument");
1319                         exit(-1);
1320                 }
1321         }
1322
1323         if (argc >= 4)
1324         {
1325                 if (strcmp(args[3], "srst_push_pull") == 0)
1326                         jtag_reset_config |= RESET_SRST_PUSH_PULL;
1327                 else if (strcmp(args[3], "srst_open_drain") == 0)
1328                         jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
1329                 else
1330                 {
1331                         ERROR("invalid reset_config argument");
1332                         exit(-1);
1333                 }
1334         }
1335
1336         return ERROR_OK;
1337 }
1338
1339 int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1340 {
1341         if (argc == 0)
1342                 command_print(cmd_ctx, "jtag_speed: %i", jtag_speed);
1343
1344         if (argc > 0)
1345         {
1346                 /* this command can be called during CONFIG,
1347                  * in which case jtag isn't initialized */
1348                 if (jtag)
1349                         jtag->speed(strtoul(args[0], NULL, 0));
1350                 else
1351                         jtag_speed = strtoul(args[0], NULL, 0);
1352         }
1353
1354         return ERROR_OK;
1355 }
1356
1357 int handle_endstate_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1358 {
1359         enum tap_state state;
1360
1361         if (argc < 1)
1362         {
1363                 command_print(cmd_ctx, "usage: endstate <tap_state>");
1364                 return ERROR_OK;
1365         }
1366
1367         for (state = 0; state < 16; state++)
1368         {
1369                 if (strcmp(args[0], tap_state_strings[state]) == 0)
1370                 {
1371                         jtag_add_end_state(state);
1372                         jtag_execute_queue();
1373                 }
1374         }
1375
1376         return ERROR_OK;
1377 }
1378
1379 int handle_jtag_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1380 {
1381         int trst = -1;
1382         int srst = -1;
1383         char *usage = "usage: jtag_reset <trst> <srst>";
1384         int retval;
1385
1386         if (argc < 1)
1387         {
1388                 command_print(cmd_ctx, usage);
1389                 return ERROR_OK;
1390         }
1391
1392         if (args[0][0] == '1')
1393                 trst = 1;
1394         else if (args[0][0] == '0')
1395                 trst = 0;
1396         else
1397         {
1398                 command_print(cmd_ctx, usage);
1399                 return ERROR_OK;
1400         }
1401
1402         if (args[1][0] == '1')
1403                 srst = 1;
1404         else if (args[1][0] == '0')
1405                 srst = 0;
1406         else
1407         {
1408                 command_print(cmd_ctx, usage);
1409                 return ERROR_OK;
1410         }
1411
1412         if ((retval = jtag_add_reset(trst, srst)) != ERROR_OK)
1413         {
1414                 switch (retval)
1415                 {
1416                         case ERROR_JTAG_RESET_WOULD_ASSERT_TRST:
1417                                 command_print(cmd_ctx, "requested reset would assert trst\nif this is acceptable, use jtag_reset 1 %c", args[1][0]);
1418                                 break;
1419                         case ERROR_JTAG_RESET_CANT_SRST:
1420                                 command_print(cmd_ctx, "can't assert srst because the current reset_config doesn't support it");
1421                                 break;
1422                         default:
1423                                 command_print(cmd_ctx, "unknown error");
1424                 }
1425         }
1426         jtag_execute_queue();
1427
1428         return ERROR_OK;
1429 }
1430
1431 int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1432 {
1433         if (argc < 1)
1434         {
1435                 command_print(cmd_ctx, "usage: runtest <num_cycles>");
1436                 return ERROR_OK;
1437         }
1438
1439         jtag_add_runtest(strtol(args[0], NULL, 0), -1);
1440         jtag_execute_queue();
1441
1442         return ERROR_OK;
1443
1444 }
1445
1446 int handle_statemove_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1447 {
1448         enum tap_state state;
1449
1450         state = -1;
1451         if (argc == 1)
1452         {
1453                 for (state = 0; state < 16; state++)
1454                 {
1455                         if (strcmp(args[0], tap_state_strings[state]) == 0)
1456                         {
1457                                 break;
1458                         }
1459                 }
1460         }
1461
1462         jtag_add_statemove(state);
1463         jtag_execute_queue();
1464
1465         return ERROR_OK;
1466
1467 }
1468
1469 int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1470 {
1471         int i;
1472         scan_field_t *fields;
1473
1474         if ((argc < 2) || (argc % 2))
1475         {
1476                 command_print(cmd_ctx, "usage: irscan <device> <instr> [dev2] [instr2] ...");
1477                 return ERROR_OK;
1478         }
1479
1480         fields = malloc(sizeof(scan_field_t) * argc / 2);
1481
1482         for (i = 0; i < argc / 2; i++)
1483         {
1484                 int device = strtoul(args[i*2], NULL, 0);
1485                 int field_size = jtag_get_device(device)->ir_length;
1486                 fields[i].device = device;
1487                 fields[i].out_value = malloc(CEIL(field_size, 8));
1488                 buf_set_u32(fields[i].out_value, 0, field_size, strtoul(args[i*2+1], NULL, 0));
1489                 fields[i].out_mask = NULL;
1490                 fields[i].in_value = NULL;
1491                 fields[i].in_check_mask = NULL;
1492                 fields[i].in_handler = NULL;
1493                 fields[i].in_handler_priv = NULL;
1494         }
1495
1496         jtag_add_ir_scan(argc / 2, fields, -1);
1497         jtag_execute_queue();
1498
1499         for (i = 0; i < argc / 2; i++)
1500                 free(fields[i].out_value);
1501
1502         free (fields);
1503
1504         return ERROR_OK;
1505 }
1506
1507 int handle_drscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1508 {
1509         scan_field_t *fields;
1510         int num_fields = 0;
1511         int field_count = 0;
1512         var_t *var;
1513         int i, j;
1514
1515         if ((argc < 2) || (argc % 2))
1516         {
1517                 command_print(cmd_ctx, "usage: drscan <device> <var> [dev2] [var2]");
1518                 return ERROR_OK;
1519         }
1520
1521         for (i = 0; i < argc; i+=2)
1522         {
1523                 var = get_var_by_namenum(args[i+1]);
1524                 if (var)
1525                 {
1526                         num_fields += var->num_fields;
1527                 }
1528                 else
1529                 {
1530                         command_print(cmd_ctx, "variable %s doesn't exist", args[i+1]);
1531                         return ERROR_OK;
1532                 }
1533         }
1534
1535         fields = malloc(sizeof(scan_field_t) * num_fields);
1536
1537         for (i = 0; i < argc; i+=2)
1538         {
1539                 var = get_var_by_namenum(args[i+1]);
1540
1541                 for (j = 0; j < var->num_fields; j++)
1542                 {
1543                         fields[field_count].device = strtol(args[i], NULL, 0);
1544                         fields[field_count].num_bits = var->fields[j].num_bits;
1545                         fields[field_count].out_value = malloc(CEIL(var->fields[j].num_bits, 8));
1546                         buf_set_u32(fields[field_count].out_value, 0, var->fields[j].num_bits, var->fields[j].value);
1547                         fields[field_count].out_mask = NULL;
1548                         fields[field_count].in_value = fields[field_count].out_value;
1549                         fields[field_count].in_check_mask = NULL;
1550                         fields[field_count].in_check_value = NULL;
1551                         fields[field_count].in_handler = field_le_to_host;
1552                         fields[field_count++].in_handler_priv = &(var->fields[j]);
1553                 }
1554         }
1555
1556         jtag_add_dr_scan(num_fields, fields, -1);
1557         jtag_execute_queue();
1558
1559         for (i = 0; i < argc / 2; i++)
1560                 free(fields[i].out_value);
1561
1562         free(fields);
1563
1564         return ERROR_OK;
1565 }
1566
1567 int handle_verify_ircapture_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1568 {
1569         if (argc == 0)
1570         {
1571                 command_print(cmd_ctx, "verify Capture-IR is %s", (jtag_verify_capture_ir) ? "enabled": "disabled");
1572                 return ERROR_OK;
1573         }
1574
1575         if (strcmp(args[0], "enable") == 0)
1576         {
1577                 jtag_verify_capture_ir = 1;
1578         }
1579         else if (strcmp(args[0], "disable") == 0)
1580         {
1581                 jtag_verify_capture_ir = 0;
1582         }
1583
1584         return ERROR_OK;
1585 }