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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 "jtag.h"
  38
  39 #include <usb.h>
  40
  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 static int usbprog_execute_queue(void);
  52 static int usbprog_speed(int speed);
  53 static int usbprog_register_commands(struct command_context_s *cmd_ctx);
  54 static int usbprog_init(void);
  55 static int usbprog_quit(void);
  56
  57 static void usbprog_end_state(tap_state_t state);
  58 static void usbprog_state_move(void);
  59 static void usbprog_path_move(pathmove_command_t *cmd);
  60 static void usbprog_runtest(int num_cycles);
  61 static void usbprog_scan(bool 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         .speed = usbprog_speed,
  68         .register_commands = usbprog_register_commands,
  69         .init = usbprog_init,
  70         .quit = usbprog_quit
  71 };
  72
  73 #define UNKOWN_COMMAND  0x00
  74 #define PORT_DIRECTION  0x01
  75 #define PORT_SET                0x02
  76 #define PORT_GET                0x03
  77 #define PORT_SETBIT             0x04
  78 #define PORT_GETBIT             0x05
  79 #define WRITE_TDI               0x06
  80 #define READ_TDO                0x07
  81 #define WRITE_AND_READ  0x08
  82 #define WRITE_TMS               0x09
  83 #define WRITE_TMS_CHAIN 0x0A
  84
  85 struct usbprog_jtag
  86 {
  87         struct usb_dev_handle* usb_handle;
  88 };
  89
  90 static struct usbprog_jtag * usbprog_jtag_handle;
  91
  92 static struct usbprog_jtag* usbprog_jtag_open(void);
  93 //static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
  94 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
  95 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
  96
  97 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  98 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  99 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 100 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
 101
 102 static char tms_chain[64];
 103 static int tms_chain_index;
 104
 105 static void usbprog_jtag_tms_collect(char tms_scan);
 106 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
 107
 108 static void usbprog_write(int tck, int tms, int tdi);
 109 static void usbprog_reset(int trst, int srst);
 110
 111 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
 112 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
 113 //static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
 114 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
 115 //static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
 116
 117 static int usbprog_speed(int speed)
 118 {
 119         return ERROR_OK;
 120 }
 121
 122 static int usbprog_register_commands(struct command_context_s *cmd_ctx)
 123 {
 124         return ERROR_OK;
 125 }
 126
 127 static 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                                 LOG_DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
 141 #endif
 142                                 if (cmd->cmd.end_state->end_state != TAP_INVALID)
 143                                         usbprog_end_state(cmd->cmd.end_state->end_state);
 144                                 break;
 145                         case JTAG_RESET:
 146 #ifdef _DEBUG_JTAG_IO_
 147                                 LOG_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                                         tap_set_state(TAP_RESET);
 152                                 }
 153                                 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 154                                 break;
 155                         case JTAG_RUNTEST:
 156 #ifdef _DEBUG_JTAG_IO_
 157                                 LOG_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 != TAP_INVALID)
 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                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 166 #endif
 167                                 if (cmd->cmd.statemove->end_state != TAP_INVALID)
 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                                 LOG_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                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 181 #endif
 182                                 if (cmd->cmd.scan->end_state != TAP_INVALID)
 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                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 195 #endif
 196                                 jtag_sleep(cmd->cmd.sleep->us);
 197                                         break;
 198                         default:
 199                                 LOG_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 static 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                 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 217                 return ERROR_JTAG_INIT_FAILED;
 218         }
 219
 220         LOG_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 static int usbprog_quit(void)
 230 {
 231         return ERROR_OK;
 232 }
 233
 234 /*************** jtag execute commands **********************/
 235 static void usbprog_end_state(tap_state_t state)
 236 {
 237         if (tap_is_state_stable(state))
 238                 tap_set_end_state(state);
 239         else
 240         {
 241                 LOG_ERROR("BUG: %i is not a valid end state", state);
 242                 exit(-1);
 243         }
 244 }
 245
 246 static void usbprog_state_move(void)
 247 {
 248         int i = 0, tms = 0;
 249         u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 250         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 251
 252         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 253         for (i = 0; i < tms_count; i++)
 254         {
 255                 tms = (tms_scan >> i) & 1;
 256         }
 257
 258         tap_set_state(tap_get_end_state());
 259 }
 260
 261 static void usbprog_path_move(pathmove_command_t *cmd)
 262 {
 263         int num_states = cmd->num_states;
 264         int state_count;
 265
 266         /* There may be queued transitions, and before following a specified
 267            path, we must flush those queued transitions */
 268         usbprog_jtag_tms_send(usbprog_jtag_handle);
 269
 270         state_count = 0;
 271         while (num_states)
 272         {
 273                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 274                 {
 275                         /* LOG_INFO("1"); */
 276                         usbprog_write(0, 0, 0);
 277                         usbprog_write(1, 0, 0);
 278                 }
 279                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 280                 {
 281                         /* LOG_INFO("2"); */
 282                         usbprog_write(0, 1, 0);
 283                         usbprog_write(1, 1, 0);
 284                 }
 285                 else
 286                 {
 287                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 288                         exit(-1);
 289                 }
 290
 291                 tap_set_state(cmd->path[state_count]);
 292                 state_count++;
 293                 num_states--;
 294         }
 295
 296         tap_set_end_state(tap_get_state());
 297 }
 298
 299 static void usbprog_runtest(int num_cycles)
 300 {
 301         int i;
 302
 303         /* only do a state_move when we're not already in IDLE */
 304         if (tap_get_state() != TAP_IDLE)
 305         {
 306                 usbprog_end_state(TAP_IDLE);
 307                 usbprog_state_move();
 308         }
 309
 310         /* execute num_cycles */
 311         if (num_cycles > 0)
 312         {
 313                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 314                 usbprog_write(0, 0, 0);
 315         }
 316         else
 317         {
 318                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 319                 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
 320         }
 321
 322         for (i = 0; i < num_cycles; i++)
 323         {
 324                 usbprog_write(1, 0, 0);
 325                 usbprog_write(0, 0, 0);
 326         }
 327
 328 #ifdef _DEBUG_JTAG_IO_
 329         LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
 330 #endif
 331
 332         /* finish in end_state */
 333         /*
 334         usbprog_end_state(saved_end_state);
 335         if (tap_get_state() != tap_get_end_state())
 336                 usbprog_state_move();
 337         */
 338 }
 339
 340 static void usbprog_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 341 {
 342         tap_state_t saved_end_state = tap_get_end_state();
 343
 344         if (ir_scan)
 345                 usbprog_end_state(TAP_IRSHIFT);
 346         else
 347                 usbprog_end_state(TAP_DRSHIFT);
 348
 349         /* Only move if we're not already there */
 350         if (tap_get_state() != tap_get_end_state())
 351                 usbprog_state_move();
 352
 353         usbprog_end_state(saved_end_state);
 354
 355         usbprog_jtag_tms_send(usbprog_jtag_handle);
 356
 357         void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 358         switch (type) {
 359         case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
 360         case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
 361         case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
 362         default:
 363                 LOG_ERROR("unknown scan type: %i", type);
 364                 exit(-1);
 365         }
 366         f(usbprog_jtag_handle, (char *)buffer, scan_size);
 367
 368         /* The adapter does the transition to PAUSE internally */
 369         if (ir_scan)
 370                 tap_set_state(TAP_IRPAUSE);
 371         else
 372                 tap_set_state(TAP_DRPAUSE);
 373
 374         if (tap_get_state() != tap_get_end_state())
 375                 usbprog_state_move();
 376 }
 377
 378 /*************** jtag wrapper functions *********************/
 379
 380 static void usbprog_write(int tck, int tms, int tdi)
 381 {
 382         unsigned char output_value=0x00;
 383
 384         if (tms)
 385                 output_value |= (1<<TMS_BIT);
 386         if (tdi)
 387                 output_value |= (1<<TDI_BIT);
 388         if (tck)
 389                 output_value |= (1<<TCK_BIT);
 390
 391         usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
 392 }
 393
 394 /* (1) assert or (0) deassert reset lines */
 395 static void usbprog_reset(int trst, int srst)
 396 {
 397         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 398
 399         if (trst)
 400                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 401         else
 402                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 403
 404         if (srst)
 405                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 406         else
 407                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 408 }
 409
 410 /*************** jtag lowlevel functions ********************/
 411
 412 struct usb_bus *busses;
 413
 414 struct usbprog_jtag* usbprog_jtag_open(void)
 415 {
 416         struct usb_bus *bus;
 417         struct usb_device *dev;
 418
 419         struct usbprog_jtag *tmp;
 420
 421         tmp = (struct usbprog_jtag*)malloc(sizeof(struct usbprog_jtag));
 422
 423         usb_set_debug(10);
 424         usb_init();
 425         usb_find_busses();
 426         usb_find_devices();
 427
 428         busses = usb_get_busses();
 429
 430         /* find usbprog_jtag device in usb bus */
 431
 432         for (bus = busses; bus; bus = bus->next)
 433         {
 434                 for (dev = bus->devices; dev; dev = dev->next)
 435                 {
 436                         /* condition for sucessfully hit (too bad, I only check the vendor id)*/
 437                         if (dev->descriptor.idVendor == VID && dev->descriptor.idProduct == PID)
 438                         {
 439                                 tmp->usb_handle = usb_open(dev);
 440                                 usb_set_configuration(tmp->usb_handle, 1);
 441                                 usb_claim_interface(tmp->usb_handle, 0);
 442                                 usb_set_altinterface(tmp->usb_handle, 0);
 443                                 return tmp;
 444                         }
 445                 }
 446         }
 447         return 0;
 448 }
 449
 450 #if 0
 451 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 452 {
 453         usb_close(usbprog_jtag->usb_handle);
 454         free(usbprog_jtag);
 455 }
 456 #endif
 457
 458 static 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 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 479 {
 480         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 481 }
 482
 483 static 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 static 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 static 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 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 622 {
 623         usbprog_jtag_tms_collect(tms_scan);
 624 }
 625
 626 static 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 static 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 #if 0
 643 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 644 {
 645         char tmp[2];
 646         tmp[0] = PORT_GET;
 647         tmp[1] = 0x00;
 648         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 649 }
 650 #endif
 651
 652 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
 653 {
 654         char tmp[3];
 655         tmp[0] = PORT_SETBIT;
 656         tmp[1] = (char)bit;
 657         if (value == 1)
 658                 tmp[2] = 0x01;
 659         else
 660                 tmp[2] = 0x00;
 661         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 662 }
 663
 664 #if 0
 665 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 666 {
 667         char tmp[2];
 668         tmp[0] = PORT_GETBIT;
 669         tmp[1] = (char)bit;
 670
 671         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 672                 return 1;
 673         else
 674                 return 0;
 675 }
 676 #endif
 677
 678 static void usbprog_jtag_tms_collect(char tms_scan)
 679 {
 680         tms_chain[tms_chain_index] = tms_scan;
 681         tms_chain_index++;
 682 }
 683
 684 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 685 {
 686         int i;
 687         /* LOG_INFO("TMS SEND"); */
 688         if (tms_chain_index > 0)
 689         {
 690                 char tmp[tms_chain_index + 2];
 691                 tmp[0] = WRITE_TMS_CHAIN;
 692                 tmp[1] = (char)(tms_chain_index);
 693                 for (i = 0; i < tms_chain_index + 1; i++)
 694                         tmp[2 + i] = tms_chain[i];
 695                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 696                 tms_chain_index = 0;
 697         }
 698 }