src/jtag/drivers/usbprog.c

   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/interface.h>
  38 #include <jtag/commands.h>
  39 #include "usb_common.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 void usbprog_end_state(tap_state_t state);
  52 static void usbprog_state_move(void);
  53 static void usbprog_path_move(struct pathmove_command *cmd);
  54 static void usbprog_runtest(int num_cycles);
  55 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size);
  56
  57 #define UNKNOWN_COMMAND 0x00
  58 #define PORT_DIRECTION  0x01
  59 #define PORT_SET                0x02
  60 #define PORT_GET                0x03
  61 #define PORT_SETBIT             0x04
  62 #define PORT_GETBIT             0x05
  63 #define WRITE_TDI               0x06
  64 #define READ_TDO                0x07
  65 #define WRITE_AND_READ  0x08
  66 #define WRITE_TMS               0x09
  67 #define WRITE_TMS_CHAIN 0x0A
  68
  69 struct usbprog_jtag
  70 {
  71         struct usb_dev_handle* usb_handle;
  72 };
  73
  74 static struct usbprog_jtag * usbprog_jtag_handle;
  75
  76 static struct usbprog_jtag* usbprog_jtag_open(void);
  77 //static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
  78 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
  79 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
  80
  81 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  82 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  83 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  84 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
  85
  86 static char tms_chain[64];
  87 static int tms_chain_index;
  88
  89 static void usbprog_jtag_tms_collect(char tms_scan);
  90 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
  91
  92 static void usbprog_write(int tck, int tms, int tdi);
  93 static void usbprog_reset(int trst, int srst);
  94
  95 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
  96 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
  97 //static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
  98 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
  99 //static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
 100
 101 static int usbprog_speed(int speed)
 102 {
 103         return ERROR_OK;
 104 }
 105
 106 static int usbprog_execute_queue(void)
 107 {
 108         struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
 109         int scan_size;
 110         enum scan_type type;
 111         uint8_t *buffer;
 112
 113         while (cmd)
 114         {
 115                 switch (cmd->type)
 116                 {
 117                         case JTAG_RESET:
 118 #ifdef _DEBUG_JTAG_IO_
 119                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 120 #endif
 121                                 if (cmd->cmd.reset->trst == 1)
 122                                 {
 123                                         tap_set_state(TAP_RESET);
 124                                 }
 125                                 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 126                                 break;
 127                         case JTAG_RUNTEST:
 128 #ifdef _DEBUG_JTAG_IO_
 129                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 130 #endif
 131                                 usbprog_end_state(cmd->cmd.runtest->end_state);
 132                                 usbprog_runtest(cmd->cmd.runtest->num_cycles);
 133                                 break;
 134                         case JTAG_TLR_RESET:
 135 #ifdef _DEBUG_JTAG_IO_
 136                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 137 #endif
 138                                 usbprog_end_state(cmd->cmd.statemove->end_state);
 139                                 usbprog_state_move();
 140                                 break;
 141                         case JTAG_PATHMOVE:
 142 #ifdef _DEBUG_JTAG_IO_
 143                                 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 144                                         cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 145 #endif
 146                                 usbprog_path_move(cmd->cmd.pathmove);
 147                                 break;
 148                         case JTAG_SCAN:
 149 #ifdef _DEBUG_JTAG_IO_
 150                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 151 #endif
 152                                 usbprog_end_state(cmd->cmd.scan->end_state);
 153                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 154                                 type = jtag_scan_type(cmd->cmd.scan);
 155                                 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 156                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 157                                         return ERROR_JTAG_QUEUE_FAILED;
 158                                 if (buffer)
 159                                         free(buffer);
 160                                 break;
 161                         case JTAG_SLEEP:
 162 #ifdef _DEBUG_JTAG_IO_
 163                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 164 #endif
 165                                 jtag_sleep(cmd->cmd.sleep->us);
 166                                         break;
 167                         default:
 168                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 169                                 exit(-1);
 170                 }
 171
 172                 cmd = cmd->next;
 173         }
 174
 175         return ERROR_OK;
 176 }
 177
 178 static int usbprog_init(void)
 179 {
 180         usbprog_jtag_handle = usbprog_jtag_open();
 181
 182         tms_chain_index = 0;
 183         if (usbprog_jtag_handle == 0)
 184         {
 185                 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 186                 return ERROR_JTAG_INIT_FAILED;
 187         }
 188
 189         LOG_INFO("USB JTAG Interface ready!");
 190
 191         usbprog_jtag_init(usbprog_jtag_handle);
 192         usbprog_reset(0, 0);
 193         usbprog_write(0, 0, 0);
 194
 195         return ERROR_OK;
 196 }
 197
 198 static int usbprog_quit(void)
 199 {
 200         return ERROR_OK;
 201 }
 202
 203 /*************** jtag execute commands **********************/
 204 static void usbprog_end_state(tap_state_t state)
 205 {
 206         if (tap_is_state_stable(state))
 207                 tap_set_end_state(state);
 208         else
 209         {
 210                 LOG_ERROR("BUG: %i is not a valid end state", state);
 211                 exit(-1);
 212         }
 213 }
 214
 215 static void usbprog_state_move(void)
 216 {
 217         int i = 0, tms = 0;
 218         uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 219         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 220
 221         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 222         for (i = 0; i < tms_count; i++)
 223         {
 224                 tms = (tms_scan >> i) & 1;
 225         }
 226
 227         tap_set_state(tap_get_end_state());
 228 }
 229
 230 static void usbprog_path_move(struct pathmove_command *cmd)
 231 {
 232         int num_states = cmd->num_states;
 233         int state_count;
 234
 235         /* There may be queued transitions, and before following a specified
 236            path, we must flush those queued transitions */
 237         usbprog_jtag_tms_send(usbprog_jtag_handle);
 238
 239         state_count = 0;
 240         while (num_states)
 241         {
 242                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 243                 {
 244                         /* LOG_INFO("1"); */
 245                         usbprog_write(0, 0, 0);
 246                         usbprog_write(1, 0, 0);
 247                 }
 248                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 249                 {
 250                         /* LOG_INFO("2"); */
 251                         usbprog_write(0, 1, 0);
 252                         usbprog_write(1, 1, 0);
 253                 }
 254                 else
 255                 {
 256                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 257                         exit(-1);
 258                 }
 259
 260                 tap_set_state(cmd->path[state_count]);
 261                 state_count++;
 262                 num_states--;
 263         }
 264
 265         tap_set_end_state(tap_get_state());
 266 }
 267
 268 static void usbprog_runtest(int num_cycles)
 269 {
 270         int i;
 271
 272         /* only do a state_move when we're not already in IDLE */
 273         if (tap_get_state() != TAP_IDLE)
 274         {
 275                 usbprog_end_state(TAP_IDLE);
 276                 usbprog_state_move();
 277         }
 278
 279         /* execute num_cycles */
 280         if (num_cycles > 0)
 281         {
 282                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 283                 usbprog_write(0, 0, 0);
 284         }
 285         else
 286         {
 287                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 288                 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
 289         }
 290
 291         for (i = 0; i < num_cycles; i++)
 292         {
 293                 usbprog_write(1, 0, 0);
 294                 usbprog_write(0, 0, 0);
 295         }
 296
 297 #ifdef _DEBUG_JTAG_IO_
 298         LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
 299 #endif
 300
 301         /* finish in end_state */
 302         /*
 303         usbprog_end_state(saved_end_state);
 304         if (tap_get_state() != tap_get_end_state())
 305                 usbprog_state_move();
 306         */
 307 }
 308
 309 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 310 {
 311         tap_state_t saved_end_state = tap_get_end_state();
 312
 313         if (ir_scan)
 314                 usbprog_end_state(TAP_IRSHIFT);
 315         else
 316                 usbprog_end_state(TAP_DRSHIFT);
 317
 318         /* Only move if we're not already there */
 319         if (tap_get_state() != tap_get_end_state())
 320                 usbprog_state_move();
 321
 322         usbprog_end_state(saved_end_state);
 323
 324         usbprog_jtag_tms_send(usbprog_jtag_handle);
 325
 326         void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 327         switch (type) {
 328         case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
 329         case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
 330         case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
 331         default:
 332                 LOG_ERROR("unknown scan type: %i", type);
 333                 exit(-1);
 334         }
 335         f(usbprog_jtag_handle, (char *)buffer, scan_size);
 336
 337         /* The adapter does the transition to PAUSE internally */
 338         if (ir_scan)
 339                 tap_set_state(TAP_IRPAUSE);
 340         else
 341                 tap_set_state(TAP_DRPAUSE);
 342
 343         if (tap_get_state() != tap_get_end_state())
 344                 usbprog_state_move();
 345 }
 346
 347 /*************** jtag wrapper functions *********************/
 348
 349 static void usbprog_write(int tck, int tms, int tdi)
 350 {
 351         unsigned char output_value = 0x00;
 352
 353         if (tms)
 354                 output_value |= (1 << TMS_BIT);
 355         if (tdi)
 356                 output_value |= (1 << TDI_BIT);
 357         if (tck)
 358                 output_value |= (1 << TCK_BIT);
 359
 360         usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
 361 }
 362
 363 /* (1) assert or (0) deassert reset lines */
 364 static void usbprog_reset(int trst, int srst)
 365 {
 366         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 367
 368         if (trst)
 369                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 370         else
 371                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 372
 373         if (srst)
 374                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 375         else
 376                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 377 }
 378
 379 /*************** jtag lowlevel functions ********************/
 380
 381 struct usb_bus *busses;
 382
 383 struct usbprog_jtag* usbprog_jtag_open(void)
 384 {
 385         usb_set_debug(10);
 386         usb_init();
 387
 388         const uint16_t vids[] = { VID, 0 };
 389         const uint16_t pids[] = { PID, 0 };
 390         struct usb_dev_handle *dev;
 391         if (jtag_usb_open(vids, pids, &dev) != ERROR_OK)
 392                 return NULL;
 393
 394         struct usbprog_jtag *tmp = malloc(sizeof(struct usbprog_jtag));
 395         tmp->usb_handle = dev;
 396
 397         usb_set_configuration(dev, 1);
 398         usb_claim_interface(dev, 0);
 399         usb_set_altinterface(dev, 0);
 400
 401         return tmp;
 402 }
 403
 404 #if 0
 405 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 406 {
 407         usb_close(usbprog_jtag->usb_handle);
 408         free(usbprog_jtag);
 409 }
 410 #endif
 411
 412 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
 413 {
 414         int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
 415         if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
 416                         (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
 417                 return 1;
 418         if (res == msglen)
 419         {
 420                 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
 421                 res =  usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
 422                 if (res > 0)
 423                         return (unsigned char)msg[1];
 424                 else
 425                         return -1;
 426         }
 427         else
 428                 return -1;
 429         return 0;
 430 }
 431
 432 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 433 {
 434         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 435 }
 436
 437 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 438 {
 439         char tmp[64];   /* fastes packet size for usb controller */
 440         int send_bits, bufindex = 0, fillindex = 0, i, loops;
 441
 442         char swap;
 443         /* 61 byte can be transfered (488 bit) */
 444
 445         while (size > 0)
 446         {
 447                 if (size > 488)
 448                 {
 449                         send_bits = 488;
 450                         size = size - 488;
 451                         loops = 61;
 452                 }
 453                 else
 454                 {
 455                         send_bits = size;
 456                         loops = size / 8;
 457                         loops++;
 458                         size = 0;
 459                 }
 460                 tmp[0] = WRITE_AND_READ;
 461                 tmp[1] = (char)(send_bits >> 8);        /* high */
 462                 tmp[2] = (char)(send_bits);                     /* low */
 463                 i = 0;
 464
 465                 for (i = 0; i < loops; i++)
 466                 {
 467                         tmp[3 + i] = buffer[bufindex];
 468                         bufindex++;
 469                 }
 470
 471                 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
 472                 {
 473                         /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
 474                         usleep(1);
 475                         int timeout = 0;
 476                         while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
 477                         {
 478                                 timeout++;
 479                                 if (timeout > 10)
 480                                         break;
 481                         }
 482
 483                         for (i = 0; i < loops; i++)
 484                         {
 485                                 swap =  tmp[3 + i];
 486                                 buffer[fillindex++] = swap;
 487                         }
 488                 }
 489         }
 490 }
 491
 492 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 493 {
 494         char tmp[64];   /* fastes packet size for usb controller */
 495         int send_bits, fillindex = 0, i, loops;
 496
 497         char swap;
 498         /* 61 byte can be transfered (488 bit) */
 499
 500         while (size > 0)
 501         {
 502                 if (size > 488)
 503                 {
 504                         send_bits = 488;
 505                         size = size - 488;
 506                         loops = 61;
 507                 }
 508                 else
 509                 {
 510                         send_bits = size;
 511                         loops = size / 8;
 512                         loops++;
 513                         size = 0;
 514                 }
 515                 tmp[0] = WRITE_AND_READ;
 516                 tmp[1] = (char)(send_bits >> 8);        /* high */
 517                 tmp[2] = (char)(send_bits);                     /* low */
 518
 519                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
 520
 521                 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
 522                 int timeout = 0;
 523                 usleep(1);
 524                 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
 525                 {
 526                         timeout++;
 527                         if (timeout > 10)
 528                                 break;
 529                 }
 530
 531                 for (i = 0; i < loops; i++)
 532                 {
 533                         swap = tmp[3 + i];
 534                         buffer[fillindex++] = swap;
 535                 }
 536         }
 537 }
 538
 539 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 540 {
 541         char tmp[64];   /* fastes packet size for usb controller */
 542         int send_bits, bufindex = 0, i, loops;
 543
 544         /* 61 byte can be transfered (488 bit) */
 545         while (size > 0)
 546         {
 547                 if (size > 488)
 548                 {
 549                         send_bits = 488;
 550                         size = size - 488;
 551                         loops = 61;
 552                 }
 553                 else
 554                 {
 555                         send_bits = size;
 556                         loops = size/8;
 557                         /* if (loops == 0) */
 558                         loops++;
 559                         size = 0;
 560                 }
 561                 tmp[0] = WRITE_TDI;
 562                 tmp[1] = (char)(send_bits >> 8);        /* high */
 563                 tmp[2] = (char)(send_bits);                     /* low */
 564                 i = 0;
 565
 566                 for (i = 0; i < loops; i++)
 567                 {
 568                         tmp[3 + i] = buffer[bufindex];
 569                         bufindex++;
 570                 }
 571                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
 572         }
 573 }
 574
 575 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 576 {
 577         usbprog_jtag_tms_collect(tms_scan);
 578 }
 579
 580 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
 581 {
 582         char tmp[2];
 583         tmp[0] = PORT_DIRECTION;
 584         tmp[1] = (char)direction;
 585         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 586 }
 587
 588 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
 589 {
 590         char tmp[2];
 591         tmp[0] = PORT_SET;
 592         tmp[1] = (char)value;
 593         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 594 }
 595
 596 #if 0
 597 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 598 {
 599         char tmp[2];
 600         tmp[0] = PORT_GET;
 601         tmp[1] = 0x00;
 602         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 603 }
 604 #endif
 605
 606 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
 607 {
 608         char tmp[3];
 609         tmp[0] = PORT_SETBIT;
 610         tmp[1] = (char)bit;
 611         if (value == 1)
 612                 tmp[2] = 0x01;
 613         else
 614                 tmp[2] = 0x00;
 615         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 616 }
 617
 618 #if 0
 619 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 620 {
 621         char tmp[2];
 622         tmp[0] = PORT_GETBIT;
 623         tmp[1] = (char)bit;
 624
 625         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 626                 return 1;
 627         else
 628                 return 0;
 629 }
 630 #endif
 631
 632 static void usbprog_jtag_tms_collect(char tms_scan)
 633 {
 634         tms_chain[tms_chain_index] = tms_scan;
 635         tms_chain_index++;
 636 }
 637
 638 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 639 {
 640         int i;
 641         /* LOG_INFO("TMS SEND"); */
 642         if (tms_chain_index > 0)
 643         {
 644                 char tmp[tms_chain_index + 2];
 645                 tmp[0] = WRITE_TMS_CHAIN;
 646                 tmp[1] = (char)(tms_chain_index);
 647                 for (i = 0; i < tms_chain_index + 1; i++)
 648                         tmp[2 + i] = tms_chain[i];
 649                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 650                 tms_chain_index = 0;
 651         }
 652 }
 653
 654 struct jtag_interface usbprog_interface = {
 655         .name = "usbprog",
 656
 657         .execute_queue = usbprog_execute_queue,
 658         .speed = usbprog_speed,
 659         .init = usbprog_init,
 660         .quit = usbprog_quit
 661 };