src/jtag/usbprog.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Benedikt Sauter sauter@ixbat.de                         *
   3  *   based on Dominic Rath's amt_jtagaccel.c                                       *
   4  *                                                                                                             *
   5  *   usbprog is a free programming adapter. You can easily install             *
   6  *   different firmware versions from an "online pool" over USB.               *
   7  *   The adapter can be used for programming and debugging AVR and ARM     *
   8  *   processors, as USB to RS232 converter, as JTAG interface or as        *
   9  *   simple I/O interface (5 lines).                                                       *
  10  *                                                                                                             *
  11  *   http://www.embedded-projects.net/usbprog                                          *
  12  *                                                                         *
  13  *   This program is free software; you can redistribute it and/or modify  *
  14  *   it under the terms of the GNU General Public License as published by  *
  15  *   the Free Software Foundation; either version 2 of the License, or     *
  16  *   (at your option) any later version.                                   *
  17  *                                                                         *
  18  *   This program is distributed in the hope that it will be useful,       *
  19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  21  *   GNU General Public License for more details.                          *
  22  *                                                                         *
  23  *   You should have received a copy of the GNU General Public License     *
  24  *   along with this program; if not, write to the                         *
  25  *   Free Software Foundation, Inc.,                                       *
  26  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  27  ***************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include "replacements.h"
  34
  35 #include "jtag.h"
  36 #include <usb.h>
  37
  38 /* system includes */
  39
  40 #include "log.h"
  41
  42 #define VID 0x1781
  43 #define PID 0x0c63
  44
  45 /* Pins at usbprog */
  46 #define TDO_BIT         0
  47 #define TDI_BIT         3
  48 #define TCK_BIT         2
  49 #define TMS_BIT         1
  50
  51 int usbprog_execute_queue(void);
  52 int usbprog_speed(int speed);
  53 int usbprog_register_commands(struct command_context_s *cmd_ctx);
  54 int usbprog_init(void);
  55 int usbprog_quit(void);
  56
  57 void usbprog_end_state(enum tap_state state);
  58 void usbprog_state_move(void);
  59 void usbprog_path_move(pathmove_command_t *cmd);
  60 void usbprog_runtest(int num_cycles);
  61 void usbprog_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size);
  62
  63 jtag_interface_t usbprog_interface =
  64 {
  65         .name = "usbprog",
  66         .execute_queue = usbprog_execute_queue,
  67         .support_pathmove = 0,
  68         .speed = usbprog_speed,
  69         .register_commands = usbprog_register_commands,
  70         .init = usbprog_init,
  71         .quit = usbprog_quit
  72 };
  73
  74 #define UNKOWN_COMMAND  0x00
  75 #define PORT_DIRECTION  0x01
  76 #define PORT_SET        0x02
  77 #define PORT_GET        0x03
  78 #define PORT_SETBIT     0x04
  79 #define PORT_GETBIT     0x05
  80 #define WRITE_TDI       0x06
  81 #define READ_TDO        0x07
  82 #define WRITE_AND_READ  0x08
  83 #define WRITE_TMS       0x09
  84 #define WRITE_TMS_CHAIN 0x0A
  85
  86 struct usbprog_jtag
  87 {
  88         struct usb_dev_handle* usb_handle;
  89 };
  90
  91 struct usbprog_jtag * usbprog_jtag_handle;
  92
  93 struct usbprog_jtag* usbprog_jtag_open();
  94 void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
  95 void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
  96 unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
  97
  98 void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  99 void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 100 void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 101 void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
 102
 103 char tms_chain[64];
 104 int tms_chain_index;
 105 void usbprog_jtag_tms_collect(char tms_scan);
 106 void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
 107
 108 void usbprog_write(int tck, int tms, int tdi);
 109 void usbprog_reset(int trst, int srst);
 110
 111 void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
 112 void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
 113 unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
 114 void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
 115 int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
 116
 117 int usbprog_speed(int speed)
 118 {
 119         return ERROR_OK;
 120 }
 121
 122 int usbprog_register_commands(struct command_context_s *cmd_ctx)
 123 {
 124         return ERROR_OK;
 125 }
 126
 127 int usbprog_execute_queue(void)
 128 {
 129         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 130         int scan_size;
 131         enum scan_type type;
 132         u8 *buffer;
 133
 134         while (cmd)
 135         {
 136                 switch (cmd->type)
 137                 {
 138                         case JTAG_END_STATE:
 139 #ifdef _DEBUG_JTAG_IO_
 140                                 DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
 141 #endif
 142                                 if (cmd->cmd.end_state->end_state != -1)
 143                                         usbprog_end_state(cmd->cmd.end_state->end_state);
 144                                 break;
 145                         case JTAG_RESET:
 146 #ifdef _DEBUG_JTAG_IO_
 147                                 DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 148 #endif
 149                                 if (cmd->cmd.reset->trst == 1)
 150                                 {
 151                                         cur_state = TAP_TLR;
 152                                 }
 153                                 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 154                                 break;
 155                         case JTAG_RUNTEST:
 156 #ifdef _DEBUG_JTAG_IO_
 157                                 DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 158 #endif
 159                                 if (cmd->cmd.runtest->end_state != -1)
 160                                         usbprog_end_state(cmd->cmd.runtest->end_state);
 161                                 usbprog_runtest(cmd->cmd.runtest->num_cycles);
 162                                 break;
 163                         case JTAG_STATEMOVE:
 164 #ifdef _DEBUG_JTAG_IO_
 165                                 DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 166 #endif
 167                                 if (cmd->cmd.statemove->end_state != -1)
 168                                         usbprog_end_state(cmd->cmd.statemove->end_state);
 169                                 usbprog_state_move();
 170                                 break;
 171                         case JTAG_PATHMOVE:
 172 #ifdef _DEBUG_JTAG_IO_
 173                                 DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 174                                         cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 175 #endif
 176                                 usbprog_path_move(cmd->cmd.pathmove);
 177                                 break;
 178                         case JTAG_SCAN:
 179 #ifdef _DEBUG_JTAG_IO_
 180                                 DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 181 #endif
 182                                 if (cmd->cmd.scan->end_state != -1)
 183                                         usbprog_end_state(cmd->cmd.scan->end_state);
 184                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 185                                 type = jtag_scan_type(cmd->cmd.scan);
 186                                 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 187                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 188                                         return ERROR_JTAG_QUEUE_FAILED;
 189                                 if (buffer)
 190                                         free(buffer);
 191                                 break;
 192                         case JTAG_SLEEP:
 193 #ifdef _DEBUG_JTAG_IO_
 194                                 DEBUG("sleep %i", cmd->cmd.sleep->us);
 195 #endif
 196                                 jtag_sleep(cmd->cmd.sleep->us);
 197                                         break;
 198                         default:
 199                                 ERROR("BUG: unknown JTAG command type encountered");
 200                                 exit(-1);
 201                 }
 202
 203                 cmd = cmd->next;
 204         }
 205
 206         return ERROR_OK;
 207 }
 208
 209 int usbprog_init(void)
 210 {
 211         usbprog_jtag_handle = usbprog_jtag_open();
 212
 213         tms_chain_index = 0;
 214         if (usbprog_jtag_handle == 0)
 215         {
 216                 ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 217                 return ERROR_JTAG_INIT_FAILED;
 218         }
 219
 220         INFO("USB JTAG Interface ready!");
 221
 222         usbprog_jtag_init(usbprog_jtag_handle);
 223         usbprog_reset(0, 0);
 224         usbprog_write(0, 0, 0);
 225
 226         return ERROR_OK;
 227 }
 228
 229 int usbprog_quit(void)
 230 {
 231         return ERROR_OK;
 232 }
 233
 234 /*************** jtag execute commands **********************/
 235 void usbprog_end_state(enum tap_state state)
 236 {
 237         if (tap_move_map[state] != -1)
 238                 end_state = state;
 239         else
 240         {
 241                 ERROR("BUG: %i is not a valid end state", state);
 242                 exit(-1);
 243         }
 244 }
 245
 246 void usbprog_state_move(void)
 247 {
 248         int i = 0, tms = 0;
 249         u8 tms_scan = TAP_MOVE(cur_state, end_state);
 250
 251         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 252         for (i = 0; i < 7; i++)
 253         {
 254                 tms = (tms_scan >> i) & 1;
 255         }
 256
 257         cur_state = end_state;
 258 }
 259
 260 void usbprog_path_move(pathmove_command_t *cmd)
 261 {
 262         int num_states = cmd->num_states;
 263         int state_count;
 264
 265         state_count = 0;
 266         while (num_states)
 267         {
 268                 if (tap_transitions[cur_state].low == cmd->path[state_count])
 269                 {
 270                         //INFO("1");
 271                         usbprog_write(0, 0, 0);
 272                         usbprog_write(1, 0, 0);
 273                 }
 274                 else if (tap_transitions[cur_state].high == cmd->path[state_count])
 275                 {
 276                         //INFO("2");
 277                         usbprog_write(0, 1, 0);
 278                         usbprog_write(1, 1, 0);
 279                 }
 280                 else
 281                 {
 282                         ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[cmd->path[state_count]]);
 283                         exit(-1);
 284                 }
 285
 286                 cur_state = cmd->path[state_count];
 287                 state_count++;
 288                 num_states--;
 289         }
 290
 291         end_state = cur_state;
 292 }
 293
 294 void usbprog_runtest(int num_cycles)
 295 {
 296         int i;
 297
 298         /* only do a state_move when we're not already in RTI */
 299         if (cur_state != TAP_RTI)
 300         {
 301                 usbprog_end_state(TAP_RTI);
 302                 usbprog_state_move();
 303         }
 304
 305         /* execute num_cycles */
 306         if (num_cycles > 0)
 307         {
 308                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 309                 usbprog_write(0, 0, 0);
 310         }
 311         else
 312         {
 313                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 314                 //INFO("NUM CYCLES %i",num_cycles);
 315         }
 316
 317         for (i = 0; i < num_cycles; i++)
 318         {
 319                 usbprog_write(1, 0, 0);
 320                 usbprog_write(0, 0, 0);
 321         }
 322
 323         /* finish in end_state */
 324         /*
 325         usbprog_end_state(saved_end_state);
 326         if (cur_state != end_state)
 327                 usbprog_state_move();
 328         */
 329 }
 330
 331 void usbprog_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 332 {
 333         enum tap_state saved_end_state = end_state;
 334
 335         if (ir_scan)
 336                 usbprog_end_state(TAP_SI);
 337         else
 338                 usbprog_end_state(TAP_SD);
 339
 340         //usbprog_jtag_tms_send(usbprog_jtag_handle);
 341
 342         usbprog_state_move();
 343         usbprog_end_state(saved_end_state);
 344
 345         usbprog_jtag_tms_send(usbprog_jtag_handle);
 346
 347         if (type == SCAN_OUT)
 348         {
 349                 usbprog_jtag_write_tdi(usbprog_jtag_handle,buffer, scan_size);
 350         }
 351         if (type == SCAN_IN)
 352         {
 353                 usbprog_jtag_read_tdo(usbprog_jtag_handle,buffer, scan_size);
 354         }
 355         if (type == SCAN_IO)
 356         {
 357                 usbprog_jtag_write_and_read(usbprog_jtag_handle,buffer, scan_size);
 358         }
 359
 360         if (ir_scan)
 361                 cur_state = TAP_PI;
 362         else
 363                 cur_state = TAP_PD;
 364
 365         if (cur_state != end_state)
 366                 usbprog_state_move();
 367 }
 368
 369 /*************** jtag wrapper functions *********************/
 370
 371 void usbprog_write(int tck, int tms, int tdi)
 372 {
 373         unsigned char output_value=0x00;
 374
 375         if (tms)
 376                 output_value |= (1<<TMS_BIT);
 377         if (tdi)
 378                 output_value |= (1<<TDI_BIT);
 379         if (tck)
 380                 output_value |= (1<<TCK_BIT);
 381
 382         usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
 383 }
 384
 385 /* (1) assert or (0) deassert reset lines */
 386 void usbprog_reset(int trst, int srst)
 387 {
 388         DEBUG("trst: %i, srst: %i", trst, srst);
 389
 390         if (trst)
 391                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 392         else
 393                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 394
 395         if (srst)
 396                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 397         else
 398                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 399 }
 400
 401 /*************** jtag lowlevel functions ********************/
 402
 403 struct usb_bus *busses;
 404
 405 struct usbprog_jtag* usbprog_jtag_open()
 406 {
 407         struct usb_bus *bus;
 408         struct usb_device *dev;
 409
 410         struct usbprog_jtag *tmp;
 411
 412         tmp = (struct usbprog_jtag*)malloc(sizeof(struct usbprog_jtag));
 413
 414         usb_set_debug(10);
 415         usb_init();
 416         usb_find_busses();
 417         usb_find_devices();
 418
 419         busses = usb_get_busses();
 420
 421         /* find usbprog_jtag device in usb bus */
 422
 423         for (bus = busses; bus; bus = bus->next)
 424         {
 425                 for (dev = bus->devices; dev; dev = dev->next)
 426                 {
 427                         /* condition for sucessfully hit (too bad, I only check the vendor id)*/
 428                         if (dev->descriptor.idVendor == VID && dev->descriptor.idProduct == PID)
 429                         {
 430                                 tmp->usb_handle = usb_open(dev);
 431                                 usb_set_configuration(tmp->usb_handle, 1);
 432                                 usb_claim_interface(tmp->usb_handle, 0);
 433                                 usb_set_altinterface(tmp->usb_handle, 0);
 434                                 return tmp;
 435                         }
 436                 }
 437         }
 438         return 0;
 439 }
 440
 441 void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 442 {
 443         usb_close(usbprog_jtag->usb_handle);
 444         free(usbprog_jtag);
 445 }
 446
 447 unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
 448 {
 449         int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
 450         if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
 451                         (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
 452                 return 1;
 453         if (res == msglen)
 454         {
 455                 //INFO("HALLLLOOO %i",(int)msg[0]);
 456                 res =  usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
 457                 if (res > 0)
 458                         return (unsigned char)msg[1];
 459                 else
 460                         return -1;
 461         }
 462         else
 463                 return -1;
 464         return 0;
 465 }
 466
 467 void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 468 {
 469         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 470 }
 471
 472 void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 473 {
 474         char tmp[64];   // fastes packet size for usb controller
 475         int send_bits, bufindex = 0, fillindex = 0, i, loops;
 476
 477         char swap;
 478         // 61 byte can be transfered (488 bit)
 479
 480         while (size > 0)
 481         {
 482                 if (size > 488)
 483                 {
 484                         send_bits = 488;
 485                         size = size - 488;
 486                         loops = 61;
 487                 }
 488                 else
 489                 {
 490                         send_bits = size;
 491                         loops = size / 8;
 492                         loops++;
 493                         size = 0;
 494                 }
 495                 tmp[0] = WRITE_AND_READ;
 496                 tmp[1] = (char)(send_bits >> 8);        // high
 497                 tmp[2] = (char)(send_bits);                     // low
 498                 i = 0;
 499
 500                 for (i = 0; i < loops; i++)
 501                 {
 502                         tmp[3 + i] = buffer[bufindex];
 503                         bufindex++;
 504                 }
 505
 506                 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
 507                 {
 508                         //INFO("HALLLLOOO2 %i",(int)tmp[0]);
 509                         usleep(1);
 510                         int timeout = 0;
 511                         while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
 512                         {
 513                                 timeout++;
 514                                 if (timeout > 10)
 515                                         break;
 516                         }
 517
 518                         for (i = 0; i < loops; i++)
 519                         {
 520                                 swap =  tmp[3 + i];
 521                                 buffer[fillindex++] = swap;
 522                         }
 523                 }
 524         }
 525 }
 526
 527 void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 528 {
 529         char tmp[64];   // fastes packet size for usb controller
 530         int send_bits, fillindex = 0, i, loops;
 531
 532         char swap;
 533         // 61 byte can be transfered (488 bit)
 534
 535         while (size > 0)
 536         {
 537                 if (size > 488)
 538                 {
 539                         send_bits = 488;
 540                         size = size - 488;
 541                         loops = 61;
 542                 }
 543                 else
 544                 {
 545                         send_bits = size;
 546                         loops = size / 8;
 547                         loops++;
 548                         size = 0;
 549                 }
 550                 tmp[0] = WRITE_AND_READ;
 551                 tmp[1] = (char)(send_bits >> 8);        // high
 552                 tmp[2] = (char)(send_bits);                     // low
 553
 554                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
 555
 556                 //INFO("HALLLLOOO3 %i",(int)tmp[0]);
 557                 int timeout = 0;
 558                 usleep(1);
 559                 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
 560                 {
 561                         timeout++;
 562                         if (timeout > 10)
 563                                 break;
 564                 }
 565
 566                 for (i = 0; i < loops; i++)
 567                 {
 568                         swap = tmp[3 + i];
 569                         buffer[fillindex++] = swap;
 570                 }
 571         }
 572 }
 573
 574 void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 575 {
 576         char tmp[64];   // fastes packet size for usb controller
 577         int send_bits, bufindex = 0, i, loops;
 578
 579         // 61 byte can be transfered (488 bit)
 580         while (size > 0)
 581         {
 582                 if (size > 488)
 583                 {
 584                         send_bits = 488;
 585                         size = size - 488;
 586                         loops = 61;
 587                 }
 588                 else
 589                 {
 590                         send_bits = size;
 591                         loops = size/8;
 592                         //if(loops==0)
 593                         loops++;
 594                         size = 0;
 595                 }
 596                 tmp[0] = WRITE_TDI;
 597                 tmp[1] = (char)(send_bits >> 8);        // high
 598                 tmp[2] = (char)(send_bits);                     // low
 599                 i = 0;
 600
 601                 for (i = 0; i < loops; i++)
 602                 {
 603                         tmp[3 + i] = buffer[bufindex];
 604                         bufindex++;
 605                 }
 606                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
 607         }
 608 }
 609
 610 void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 611 {
 612         usbprog_jtag_tms_collect(tms_scan);
 613 }
 614
 615 void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
 616 {
 617         char tmp[2];
 618         tmp[0] = PORT_DIRECTION;
 619         tmp[1] = (char)direction;
 620         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 621 }
 622
 623 void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
 624 {
 625         char tmp[2];
 626         tmp[0] = PORT_SET;
 627         tmp[1] = (char)value;
 628         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 629 }
 630
 631 unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 632 {
 633         char tmp[2];
 634         tmp[0] = PORT_GET;
 635         tmp[1] = 0x00;
 636         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 637 }
 638
 639 void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
 640 {
 641         char tmp[3];
 642         tmp[0] = PORT_SETBIT;
 643         tmp[1] = (char)bit;
 644         if (value == 1)
 645                 tmp[2] = 0x01;
 646         else
 647                 tmp[2] = 0x00;
 648         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 649 }
 650
 651 int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 652 {
 653         char tmp[2];
 654         tmp[0] = PORT_GETBIT;
 655         tmp[1] = (char)bit;
 656
 657         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 658                 return 1;
 659         else
 660                 return 0;
 661 }
 662
 663 void usbprog_jtag_tms_collect(char tms_scan)
 664 {
 665         tms_chain[tms_chain_index] = tms_scan;
 666         tms_chain_index++;
 667 }
 668
 669 void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 670 {
 671         int i;
 672         //INFO("TMS SEND");
 673         if (tms_chain_index > 0)
 674         {
 675                 char tmp[tms_chain_index + 2];
 676                 tmp[0] = WRITE_TMS_CHAIN;
 677                 tmp[1] = (char)(tms_chain_index);
 678                 for (i = 0; i < tms_chain_index + 1; i++)
 679                         tmp[2 + i] = tms_chain[i];
 680                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 681                 tms_chain_index = 0;
 682         }
 683 }