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   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Benedikt Sauter                                 *
   3  *   sauter@ixbat.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
  21 /*
  22  * This file is based on Dominic Rath's amt_jtagaccel.c.
  23  *
  24  * usbprog is a free programming adapter. You can easily install
  25  * different firmware versions from an "online pool" over USB.
  26  * The adapter can be used for programming and debugging AVR and ARM
  27  * processors, as USB to RS232 converter, as JTAG interface or as
  28  * simple I/O interface (5 lines).
  29  *
  30  * http://www.embedded-projects.net/usbprog
  31  */
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #include "replacements.h"
  38
  39 #include "jtag.h"
  40 #include <usb.h>
  41
  42 /* system includes */
  43
  44 #include "log.h"
  45
  46 #define VID 0x1781
  47 #define PID 0x0c63
  48
  49 /* Pins at usbprog */
  50 #define TDO_BIT                 0
  51 #define TDI_BIT                 3
  52 #define TCK_BIT                 2
  53 #define TMS_BIT                 1
  54
  55 int usbprog_execute_queue(void);
  56 int usbprog_speed(int speed);
  57 int usbprog_register_commands(struct command_context_s *cmd_ctx);
  58 int usbprog_init(void);
  59 int usbprog_quit(void);
  60
  61 void usbprog_end_state(tap_state_t state);
  62 void usbprog_state_move(void);
  63 void usbprog_path_move(pathmove_command_t *cmd);
  64 void usbprog_runtest(int num_cycles);
  65 void usbprog_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size);
  66
  67 jtag_interface_t usbprog_interface =
  68 {
  69         .name = "usbprog",
  70         .execute_queue = usbprog_execute_queue,
  71         .speed = usbprog_speed,
  72         .register_commands = usbprog_register_commands,
  73         .init = usbprog_init,
  74         .quit = usbprog_quit
  75 };
  76
  77 #define UNKOWN_COMMAND  0x00
  78 #define PORT_DIRECTION  0x01
  79 #define PORT_SET                0x02
  80 #define PORT_GET                0x03
  81 #define PORT_SETBIT             0x04
  82 #define PORT_GETBIT             0x05
  83 #define WRITE_TDI               0x06
  84 #define READ_TDO                0x07
  85 #define WRITE_AND_READ  0x08
  86 #define WRITE_TMS               0x09
  87 #define WRITE_TMS_CHAIN 0x0A
  88
  89 struct usbprog_jtag
  90 {
  91         struct usb_dev_handle* usb_handle;
  92 };
  93
  94 struct usbprog_jtag * usbprog_jtag_handle;
  95
  96 struct usbprog_jtag* usbprog_jtag_open(void);
  97 void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
  98 void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
  99 unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
 100
 101 void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 102 void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 103 void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 104 void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
 105
 106 char tms_chain[64];
 107 int tms_chain_index;
 108 void usbprog_jtag_tms_collect(char tms_scan);
 109 void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
 110
 111 void usbprog_write(int tck, int tms, int tdi);
 112 void usbprog_reset(int trst, int srst);
 113
 114 void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
 115 void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
 116 unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
 117 void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
 118 int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
 119
 120 int usbprog_speed(int speed)
 121 {
 122         return ERROR_OK;
 123 }
 124
 125 int usbprog_register_commands(struct command_context_s *cmd_ctx)
 126 {
 127         return ERROR_OK;
 128 }
 129
 130 int usbprog_execute_queue(void)
 131 {
 132         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 133         int scan_size;
 134         enum scan_type type;
 135         u8 *buffer;
 136
 137         while (cmd)
 138         {
 139                 switch (cmd->type)
 140                 {
 141                         case JTAG_END_STATE:
 142 #ifdef _DEBUG_JTAG_IO_
 143                                 LOG_DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
 144 #endif
 145                                 if (cmd->cmd.end_state->end_state != TAP_INVALID)
 146                                         usbprog_end_state(cmd->cmd.end_state->end_state);
 147                                 break;
 148                         case JTAG_RESET:
 149 #ifdef _DEBUG_JTAG_IO_
 150                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 151 #endif
 152                                 if (cmd->cmd.reset->trst == 1)
 153                                 {
 154                                         tap_set_state(TAP_RESET);
 155                                 }
 156                                 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 157                                 break;
 158                         case JTAG_RUNTEST:
 159 #ifdef _DEBUG_JTAG_IO_
 160                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 161 #endif
 162                                 if (cmd->cmd.runtest->end_state != TAP_INVALID)
 163                                         usbprog_end_state(cmd->cmd.runtest->end_state);
 164                                 usbprog_runtest(cmd->cmd.runtest->num_cycles);
 165                                 break;
 166                         case JTAG_STATEMOVE:
 167 #ifdef _DEBUG_JTAG_IO_
 168                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 169 #endif
 170                                 if (cmd->cmd.statemove->end_state != TAP_INVALID)
 171                                         usbprog_end_state(cmd->cmd.statemove->end_state);
 172                                 usbprog_state_move();
 173                                 break;
 174                         case JTAG_PATHMOVE:
 175 #ifdef _DEBUG_JTAG_IO_
 176                                 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 177                                         cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 178 #endif
 179                                 usbprog_path_move(cmd->cmd.pathmove);
 180                                 break;
 181                         case JTAG_SCAN:
 182 #ifdef _DEBUG_JTAG_IO_
 183                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 184 #endif
 185                                 if (cmd->cmd.scan->end_state != TAP_INVALID)
 186                                         usbprog_end_state(cmd->cmd.scan->end_state);
 187                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 188                                 type = jtag_scan_type(cmd->cmd.scan);
 189                                 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 190                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 191                                         return ERROR_JTAG_QUEUE_FAILED;
 192                                 if (buffer)
 193                                         free(buffer);
 194                                 break;
 195                         case JTAG_SLEEP:
 196 #ifdef _DEBUG_JTAG_IO_
 197                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 198 #endif
 199                                 jtag_sleep(cmd->cmd.sleep->us);
 200                                         break;
 201                         default:
 202                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 203                                 exit(-1);
 204                 }
 205
 206                 cmd = cmd->next;
 207         }
 208
 209         return ERROR_OK;
 210 }
 211
 212 int usbprog_init(void)
 213 {
 214         usbprog_jtag_handle = usbprog_jtag_open();
 215
 216         tms_chain_index = 0;
 217         if (usbprog_jtag_handle == 0)
 218         {
 219                 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 220                 return ERROR_JTAG_INIT_FAILED;
 221         }
 222
 223         LOG_INFO("USB JTAG Interface ready!");
 224
 225         usbprog_jtag_init(usbprog_jtag_handle);
 226         usbprog_reset(0, 0);
 227         usbprog_write(0, 0, 0);
 228
 229         return ERROR_OK;
 230 }
 231
 232 int usbprog_quit(void)
 233 {
 234         return ERROR_OK;
 235 }
 236
 237 /*************** jtag execute commands **********************/
 238 void usbprog_end_state(tap_state_t state)
 239 {
 240         if (tap_is_state_stable(state))
 241                 tap_set_end_state(state);
 242         else
 243         {
 244                 LOG_ERROR("BUG: %i is not a valid end state", state);
 245                 exit(-1);
 246         }
 247 }
 248
 249 void usbprog_state_move(void)
 250 {
 251         int i = 0, tms = 0;
 252         u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 253
 254         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 255         for (i = 0; i < 7; i++)
 256         {
 257                 tms = (tms_scan >> i) & 1;
 258         }
 259
 260         tap_set_state(tap_get_end_state());
 261 }
 262
 263 void usbprog_path_move(pathmove_command_t *cmd)
 264 {
 265         int num_states = cmd->num_states;
 266         int state_count;
 267
 268         /* There may be queued transitions, and before following a specified
 269            path, we must flush those queued transitions */
 270         usbprog_jtag_tms_send(usbprog_jtag_handle);
 271
 272         state_count = 0;
 273         while (num_states)
 274         {
 275                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 276                 {
 277                         /* LOG_INFO("1"); */
 278                         usbprog_write(0, 0, 0);
 279                         usbprog_write(1, 0, 0);
 280                 }
 281                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 282                 {
 283                         /* LOG_INFO("2"); */
 284                         usbprog_write(0, 1, 0);
 285                         usbprog_write(1, 1, 0);
 286                 }
 287                 else
 288                 {
 289                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 290                         exit(-1);
 291                 }
 292
 293                 tap_set_state(cmd->path[state_count]);
 294                 state_count++;
 295                 num_states--;
 296         }
 297
 298         tap_set_end_state(tap_get_state());
 299 }
 300
 301 void usbprog_runtest(int num_cycles)
 302 {
 303         int i;
 304
 305         /* only do a state_move when we're not already in IDLE */
 306         if (tap_get_state() != TAP_IDLE)
 307         {
 308                 usbprog_end_state(TAP_IDLE);
 309                 usbprog_state_move();
 310         }
 311
 312         /* execute num_cycles */
 313         if (num_cycles > 0)
 314         {
 315                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 316                 usbprog_write(0, 0, 0);
 317         }
 318         else
 319         {
 320                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 321                 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
 322         }
 323
 324         for (i = 0; i < num_cycles; i++)
 325         {
 326                 usbprog_write(1, 0, 0);
 327                 usbprog_write(0, 0, 0);
 328         }
 329
 330 #ifdef _DEBUG_JTAG_IO_
 331         LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
 332 #endif
 333
 334         /* finish in end_state */
 335         /*
 336         usbprog_end_state(saved_end_state);
 337         if (tap_get_state() != tap_get_end_state())
 338                 usbprog_state_move();
 339         */
 340 }
 341
 342 void usbprog_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 343 {
 344         tap_state_t saved_end_state = tap_get_end_state();
 345
 346         if (ir_scan)
 347                 usbprog_end_state(TAP_IRSHIFT);
 348         else
 349                 usbprog_end_state(TAP_DRSHIFT);
 350
 351         /* Only move if we're not already there */
 352         if (tap_get_state() != tap_get_end_state())
 353                 usbprog_state_move();
 354
 355         usbprog_end_state(saved_end_state);
 356
 357         usbprog_jtag_tms_send(usbprog_jtag_handle);
 358
 359         void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 360         switch (type) {
 361         case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
 362         case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
 363         case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
 364         default:
 365                 LOG_ERROR("unknown scan type: %i", type);
 366                 exit(-1);
 367         }
 368         f(usbprog_jtag_handle, (char *)buffer, scan_size);
 369
 370         /* The adapter does the transition to PAUSE internally */
 371         if (ir_scan)
 372                 tap_set_state(TAP_IRPAUSE);
 373         else
 374                 tap_set_state(TAP_DRPAUSE);
 375
 376         if (tap_get_state() != tap_get_end_state())
 377                 usbprog_state_move();
 378 }
 379
 380 /*************** jtag wrapper functions *********************/
 381
 382 void usbprog_write(int tck, int tms, int tdi)
 383 {
 384         unsigned char output_value=0x00;
 385
 386         if (tms)
 387                 output_value |= (1<<TMS_BIT);
 388         if (tdi)
 389                 output_value |= (1<<TDI_BIT);
 390         if (tck)
 391                 output_value |= (1<<TCK_BIT);
 392
 393         usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
 394 }
 395
 396 /* (1) assert or (0) deassert reset lines */
 397 void usbprog_reset(int trst, int srst)
 398 {
 399         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 400
 401         if (trst)
 402                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 403         else
 404                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 405
 406         if (srst)
 407                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 408         else
 409                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 410 }
 411
 412 /*************** jtag lowlevel functions ********************/
 413
 414 struct usb_bus *busses;
 415
 416 struct usbprog_jtag* usbprog_jtag_open(void)
 417 {
 418         struct usb_bus *bus;
 419         struct usb_device *dev;
 420
 421         struct usbprog_jtag *tmp;
 422
 423         tmp = (struct usbprog_jtag*)malloc(sizeof(struct usbprog_jtag));
 424
 425         usb_set_debug(10);
 426         usb_init();
 427         usb_find_busses();
 428         usb_find_devices();
 429
 430         busses = usb_get_busses();
 431
 432         /* find usbprog_jtag device in usb bus */
 433
 434         for (bus = busses; bus; bus = bus->next)
 435         {
 436                 for (dev = bus->devices; dev; dev = dev->next)
 437                 {
 438                         /* condition for sucessfully hit (too bad, I only check the vendor id)*/
 439                         if (dev->descriptor.idVendor == VID && dev->descriptor.idProduct == PID)
 440                         {
 441                                 tmp->usb_handle = usb_open(dev);
 442                                 usb_set_configuration(tmp->usb_handle, 1);
 443                                 usb_claim_interface(tmp->usb_handle, 0);
 444                                 usb_set_altinterface(tmp->usb_handle, 0);
 445                                 return tmp;
 446                         }
 447                 }
 448         }
 449         return 0;
 450 }
 451
 452 void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 453 {
 454         usb_close(usbprog_jtag->usb_handle);
 455         free(usbprog_jtag);
 456 }
 457
 458 unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
 459 {
 460         int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
 461         if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
 462                         (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
 463                 return 1;
 464         if (res == msglen)
 465         {
 466                 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
 467                 res =  usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
 468                 if (res > 0)
 469                         return (unsigned char)msg[1];
 470                 else
 471                         return -1;
 472         }
 473         else
 474                 return -1;
 475         return 0;
 476 }
 477
 478 void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 479 {
 480         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 481 }
 482
 483 void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 484 {
 485         char tmp[64];   /* fastes packet size for usb controller */
 486         int send_bits, bufindex = 0, fillindex = 0, i, loops;
 487
 488         char swap;
 489         /* 61 byte can be transfered (488 bit) */
 490
 491         while (size > 0)
 492         {
 493                 if (size > 488)
 494                 {
 495                         send_bits = 488;
 496                         size = size - 488;
 497                         loops = 61;
 498                 }
 499                 else
 500                 {
 501                         send_bits = size;
 502                         loops = size / 8;
 503                         loops++;
 504                         size = 0;
 505                 }
 506                 tmp[0] = WRITE_AND_READ;
 507                 tmp[1] = (char)(send_bits >> 8);        /* high */
 508                 tmp[2] = (char)(send_bits);                     /* low */
 509                 i = 0;
 510
 511                 for (i = 0; i < loops; i++)
 512                 {
 513                         tmp[3 + i] = buffer[bufindex];
 514                         bufindex++;
 515                 }
 516
 517                 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
 518                 {
 519                         /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
 520                         usleep(1);
 521                         int timeout = 0;
 522                         while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
 523                         {
 524                                 timeout++;
 525                                 if (timeout > 10)
 526                                         break;
 527                         }
 528
 529                         for (i = 0; i < loops; i++)
 530                         {
 531                                 swap =  tmp[3 + i];
 532                                 buffer[fillindex++] = swap;
 533                         }
 534                 }
 535         }
 536 }
 537
 538 void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 539 {
 540         char tmp[64];   /* fastes packet size for usb controller */
 541         int send_bits, fillindex = 0, i, loops;
 542
 543         char swap;
 544         /* 61 byte can be transfered (488 bit) */
 545
 546         while (size > 0)
 547         {
 548                 if (size > 488)
 549                 {
 550                         send_bits = 488;
 551                         size = size - 488;
 552                         loops = 61;
 553                 }
 554                 else
 555                 {
 556                         send_bits = size;
 557                         loops = size / 8;
 558                         loops++;
 559                         size = 0;
 560                 }
 561                 tmp[0] = WRITE_AND_READ;
 562                 tmp[1] = (char)(send_bits >> 8);        /* high */
 563                 tmp[2] = (char)(send_bits);                     /* low */
 564
 565                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
 566
 567                 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
 568                 int timeout = 0;
 569                 usleep(1);
 570                 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
 571                 {
 572                         timeout++;
 573                         if (timeout > 10)
 574                                 break;
 575                 }
 576
 577                 for (i = 0; i < loops; i++)
 578                 {
 579                         swap = tmp[3 + i];
 580                         buffer[fillindex++] = swap;
 581                 }
 582         }
 583 }
 584
 585 void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 586 {
 587         char tmp[64];   /* fastes packet size for usb controller */
 588         int send_bits, bufindex = 0, i, loops;
 589
 590         /* 61 byte can be transfered (488 bit) */
 591         while (size > 0)
 592         {
 593                 if (size > 488)
 594                 {
 595                         send_bits = 488;
 596                         size = size - 488;
 597                         loops = 61;
 598                 }
 599                 else
 600                 {
 601                         send_bits = size;
 602                         loops = size/8;
 603                         /* if(loops==0) */
 604                         loops++;
 605                         size = 0;
 606                 }
 607                 tmp[0] = WRITE_TDI;
 608                 tmp[1] = (char)(send_bits >> 8);        /* high */
 609                 tmp[2] = (char)(send_bits);                     /* low */
 610                 i = 0;
 611
 612                 for (i = 0; i < loops; i++)
 613                 {
 614                         tmp[3 + i] = buffer[bufindex];
 615                         bufindex++;
 616                 }
 617                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
 618         }
 619 }
 620
 621 void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 622 {
 623         usbprog_jtag_tms_collect(tms_scan);
 624 }
 625
 626 void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
 627 {
 628         char tmp[2];
 629         tmp[0] = PORT_DIRECTION;
 630         tmp[1] = (char)direction;
 631         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 632 }
 633
 634 void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
 635 {
 636         char tmp[2];
 637         tmp[0] = PORT_SET;
 638         tmp[1] = (char)value;
 639         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 640 }
 641
 642 unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 643 {
 644         char tmp[2];
 645         tmp[0] = PORT_GET;
 646         tmp[1] = 0x00;
 647         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 648 }
 649
 650 void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
 651 {
 652         char tmp[3];
 653         tmp[0] = PORT_SETBIT;
 654         tmp[1] = (char)bit;
 655         if (value == 1)
 656                 tmp[2] = 0x01;
 657         else
 658                 tmp[2] = 0x00;
 659         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 660 }
 661
 662 int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 663 {
 664         char tmp[2];
 665         tmp[0] = PORT_GETBIT;
 666         tmp[1] = (char)bit;
 667
 668         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 669                 return 1;
 670         else
 671                 return 0;
 672 }
 673
 674 void usbprog_jtag_tms_collect(char tms_scan)
 675 {
 676         tms_chain[tms_chain_index] = tms_scan;
 677         tms_chain_index++;
 678 }
 679
 680 void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 681 {
 682         int i;
 683         /* LOG_INFO("TMS SEND"); */
 684         if (tms_chain_index > 0)
 685         {
 686                 char tmp[tms_chain_index + 2];
 687                 tmp[0] = WRITE_TMS_CHAIN;
 688                 tmp[1] = (char)(tms_chain_index);
 689                 for (i = 0; i < tms_chain_index + 1; i++)
 690                         tmp[2 + i] = tms_chain[i];
 691                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 692                 tms_chain_index = 0;
 693         }
 694 }