git.sur5r.net Git - openocd/blob - 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 #define VID 0x1781
  42 #define PID 0x0c63
  43
  44 /* Pins at usbprog */
  45 #define TDO_BIT                 0
  46 #define TDI_BIT                 3
  47 #define TCK_BIT                 2
  48 #define TMS_BIT                 1
  49
  50 static void usbprog_end_state(tap_state_t state);
  51 static void usbprog_state_move(void);
  52 static void usbprog_path_move(struct pathmove_command *cmd);
  53 static void usbprog_runtest(int num_cycles);
  54 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size);
  55
  56 #define UNKNOWN_COMMAND 0x00
  57 #define PORT_DIRECTION  0x01
  58 #define PORT_SET                0x02
  59 #define PORT_GET                0x03
  60 #define PORT_SETBIT             0x04
  61 #define PORT_GETBIT             0x05
  62 #define WRITE_TDI               0x06
  63 #define READ_TDO                0x07
  64 #define WRITE_AND_READ  0x08
  65 #define WRITE_TMS               0x09
  66 #define WRITE_TMS_CHAIN 0x0A
  67
  68 struct usbprog_jtag {
  69         struct usb_dev_handle *usb_handle;
  70 };
  71
  72 static struct usbprog_jtag *usbprog_jtag_handle;
  73
  74 static struct usbprog_jtag *usbprog_jtag_open(void);
  75 /* static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag); */
  76 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
  77 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
  78
  79 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char *buffer, int size);
  80 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char *buffer, int size);
  81 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char *buffer, int size);
  82 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
  83
  84 static char tms_chain[64];
  85 static int tms_chain_index;
  86
  87 static void usbprog_jtag_tms_collect(char tms_scan);
  88 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
  89
  90 static void usbprog_write(int tck, int tms, int tdi);
  91 static void usbprog_reset(int trst, int srst);
  92
  93 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
  94 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag, unsigned char value);
  95 /* static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag); */
  96 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag, int bit, int value);
  97 /* static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit); */
  98
  99 static int usbprog_speed(int speed)
 100 {
 101         return ERROR_OK;
 102 }
 103
 104 static int usbprog_execute_queue(void)
 105 {
 106         struct jtag_command *cmd = jtag_command_queue;  /* currently processed command */
 107         int scan_size;
 108         enum scan_type type;
 109         uint8_t *buffer;
 110
 111         while (cmd) {
 112                 switch (cmd->type) {
 113                     case JTAG_RESET:
 114 #ifdef _DEBUG_JTAG_IO_
 115                             LOG_DEBUG("reset trst: %i srst %i",
 116                                 cmd->cmd.reset->trst,
 117                                 cmd->cmd.reset->srst);
 118 #endif
 119                             if (cmd->cmd.reset->trst == 1)
 120                                     tap_set_state(TAP_RESET);
 121                             usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 122                             break;
 123                     case JTAG_RUNTEST:
 124 #ifdef _DEBUG_JTAG_IO_
 125                             LOG_DEBUG("runtest %i cycles, end in %i",
 126                                 cmd->cmd.runtest->num_cycles,
 127                                 cmd->cmd.runtest->end_state);
 128 #endif
 129                             usbprog_end_state(cmd->cmd.runtest->end_state);
 130                             usbprog_runtest(cmd->cmd.runtest->num_cycles);
 131                             break;
 132                     case JTAG_TLR_RESET:
 133 #ifdef _DEBUG_JTAG_IO_
 134                             LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 135 #endif
 136                             usbprog_end_state(cmd->cmd.statemove->end_state);
 137                             usbprog_state_move();
 138                             break;
 139                     case JTAG_PATHMOVE:
 140 #ifdef _DEBUG_JTAG_IO_
 141                             LOG_DEBUG("pathmove: %i states, end in %i",
 142                                 cmd->cmd.pathmove->num_states,
 143                                 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 144 #endif
 145                             usbprog_path_move(cmd->cmd.pathmove);
 146                             break;
 147                     case JTAG_SCAN:
 148 #ifdef _DEBUG_JTAG_IO_
 149                             LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 150 #endif
 151                             usbprog_end_state(cmd->cmd.scan->end_state);
 152                             scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 153                             type = jtag_scan_type(cmd->cmd.scan);
 154                             usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 155                             if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 156                                     return ERROR_JTAG_QUEUE_FAILED;
 157                             if (buffer)
 158                                     free(buffer);
 159                             break;
 160                     case JTAG_SLEEP:
 161 #ifdef _DEBUG_JTAG_IO_
 162                             LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 163 #endif
 164                             jtag_sleep(cmd->cmd.sleep->us);
 165                             break;
 166                     default:
 167                             LOG_ERROR("BUG: unknown JTAG command type encountered");
 168                             exit(-1);
 169                 }
 170
 171                 cmd = cmd->next;
 172         }
 173
 174         return ERROR_OK;
 175 }
 176
 177 static int usbprog_init(void)
 178 {
 179         usbprog_jtag_handle = usbprog_jtag_open();
 180
 181         tms_chain_index = 0;
 182         if (usbprog_jtag_handle == 0) {
 183                 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 184                 return ERROR_JTAG_INIT_FAILED;
 185         }
 186
 187         LOG_INFO("USB JTAG Interface ready!");
 188
 189         usbprog_jtag_init(usbprog_jtag_handle);
 190         usbprog_reset(0, 0);
 191         usbprog_write(0, 0, 0);
 192
 193         return ERROR_OK;
 194 }
 195
 196 static int usbprog_quit(void)
 197 {
 198         return ERROR_OK;
 199 }
 200
 201 /*************** jtag execute commands **********************/
 202 static void usbprog_end_state(tap_state_t state)
 203 {
 204         if (tap_is_state_stable(state))
 205                 tap_set_end_state(state);
 206         else {
 207                 LOG_ERROR("BUG: %i is not a valid end state", state);
 208                 exit(-1);
 209         }
 210 }
 211
 212 static void usbprog_state_move(void)
 213 {
 214         uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 215
 216         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 217
 218         tap_set_state(tap_get_end_state());
 219 }
 220
 221 static void usbprog_path_move(struct pathmove_command *cmd)
 222 {
 223         int num_states = cmd->num_states;
 224         int state_count;
 225
 226         /* There may be queued transitions, and before following a specified
 227            path, we must flush those queued transitions */
 228         usbprog_jtag_tms_send(usbprog_jtag_handle);
 229
 230         state_count = 0;
 231         while (num_states) {
 232                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count]) {
 233                         /* LOG_INFO("1"); */
 234                         usbprog_write(0, 0, 0);
 235                         usbprog_write(1, 0, 0);
 236                 } else if (tap_state_transition(tap_get_state(),
 237                                    true) == cmd->path[state_count]) {
 238                         /* LOG_INFO("2"); */
 239                         usbprog_write(0, 1, 0);
 240                         usbprog_write(1, 1, 0);
 241                 } else {
 242                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
 243                                 tap_state_name(tap_get_state()),
 244                                 tap_state_name(cmd->path[state_count]));
 245                         exit(-1);
 246                 }
 247
 248                 tap_set_state(cmd->path[state_count]);
 249                 state_count++;
 250                 num_states--;
 251         }
 252
 253         tap_set_end_state(tap_get_state());
 254 }
 255
 256 static void usbprog_runtest(int num_cycles)
 257 {
 258         int i;
 259
 260         /* only do a state_move when we're not already in IDLE */
 261         if (tap_get_state() != TAP_IDLE) {
 262                 usbprog_end_state(TAP_IDLE);
 263                 usbprog_state_move();
 264         }
 265
 266         /* execute num_cycles */
 267         if (num_cycles > 0) {
 268                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 269                 usbprog_write(0, 0, 0);
 270         } else {
 271                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 272                 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
 273         }
 274
 275         for (i = 0; i < num_cycles; i++) {
 276                 usbprog_write(1, 0, 0);
 277                 usbprog_write(0, 0, 0);
 278         }
 279
 280 #ifdef _DEBUG_JTAG_IO_
 281         LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(
 282                         tap_get_state()), tap_state_name(tap_get_end_state()));
 283 #endif
 284
 285         /* finish in end_state */
 286         /*
 287         usbprog_end_state(saved_end_state);
 288         if (tap_get_state() != tap_get_end_state())
 289                 usbprog_state_move();
 290         */
 291 }
 292
 293 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 294 {
 295         tap_state_t saved_end_state = tap_get_end_state();
 296
 297         if (ir_scan)
 298                 usbprog_end_state(TAP_IRSHIFT);
 299         else
 300                 usbprog_end_state(TAP_DRSHIFT);
 301
 302         /* Only move if we're not already there */
 303         if (tap_get_state() != tap_get_end_state())
 304                 usbprog_state_move();
 305
 306         usbprog_end_state(saved_end_state);
 307
 308         usbprog_jtag_tms_send(usbprog_jtag_handle);
 309
 310         void (*f)(struct usbprog_jtag *usbprog_jtag, char *buffer_local, int size);
 311         switch (type) {
 312                 case SCAN_OUT:
 313                         f = &usbprog_jtag_write_tdi;
 314                         break;
 315                 case SCAN_IN:
 316                         f = &usbprog_jtag_read_tdo;
 317                         break;
 318                 case SCAN_IO:
 319                         f = &usbprog_jtag_write_and_read;
 320                         break;
 321                 default:
 322                         LOG_ERROR("unknown scan type: %i", type);
 323                         exit(-1);
 324         }
 325         f(usbprog_jtag_handle, (char *)buffer, scan_size);
 326
 327         /* The adapter does the transition to PAUSE internally */
 328         if (ir_scan)
 329                 tap_set_state(TAP_IRPAUSE);
 330         else
 331                 tap_set_state(TAP_DRPAUSE);
 332
 333         if (tap_get_state() != tap_get_end_state())
 334                 usbprog_state_move();
 335 }
 336
 337 /*************** jtag wrapper functions *********************/
 338
 339 static void usbprog_write(int tck, int tms, int tdi)
 340 {
 341         unsigned char output_value = 0x00;
 342
 343         if (tms)
 344                 output_value |= (1 << TMS_BIT);
 345         if (tdi)
 346                 output_value |= (1 << TDI_BIT);
 347         if (tck)
 348                 output_value |= (1 << TCK_BIT);
 349
 350         usbprog_jtag_write_slice(usbprog_jtag_handle, output_value);
 351 }
 352
 353 /* (1) assert or (0) deassert reset lines */
 354 static void usbprog_reset(int trst, int srst)
 355 {
 356         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 357
 358         if (trst)
 359                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 360         else
 361                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 362
 363         if (srst)
 364                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 365         else
 366                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 367 }
 368
 369 /*************** jtag lowlevel functions ********************/
 370
 371 struct usb_bus *busses;
 372
 373 struct usbprog_jtag *usbprog_jtag_open(void)
 374 {
 375         usb_set_debug(10);
 376         usb_init();
 377
 378         const uint16_t vids[] = { VID, 0 };
 379         const uint16_t pids[] = { PID, 0 };
 380         struct usb_dev_handle *dev;
 381         if (jtag_usb_open(vids, pids, &dev) != ERROR_OK)
 382                 return NULL;
 383
 384         struct usbprog_jtag *tmp = malloc(sizeof(struct usbprog_jtag));
 385         tmp->usb_handle = dev;
 386
 387         usb_set_configuration(dev, 1);
 388         usb_claim_interface(dev, 0);
 389         usb_set_altinterface(dev, 0);
 390
 391         return tmp;
 392 }
 393
 394 #if 0
 395 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 396 {
 397         usb_close(usbprog_jtag->usb_handle);
 398         free(usbprog_jtag);
 399 }
 400 #endif
 401
 402 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
 403 {
 404         int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg, msglen, 100);
 405         if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
 406             (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
 407                 return 1;
 408         if (res == msglen) {
 409                 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
 410                 res = usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
 411                 if (res > 0)
 412                         return (unsigned char)msg[1];
 413                 else
 414                         return -1;
 415         } else
 416                 return -1;
 417         return 0;
 418 }
 419
 420 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 421 {
 422         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 423 }
 424
 425 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char *buffer, int size)
 426 {
 427         char tmp[64];   /* fastes packet size for usb controller */
 428         int send_bits, bufindex = 0, fillindex = 0, i, loops;
 429
 430         char swap;
 431         /* 61 byte can be transfered (488 bit) */
 432
 433         while (size > 0) {
 434                 if (size > 488) {
 435                         send_bits = 488;
 436                         size = size - 488;
 437                         loops = 61;
 438                 } else {
 439                         send_bits = size;
 440                         loops = size / 8;
 441                         loops++;
 442                         size = 0;
 443                 }
 444                 tmp[0] = WRITE_AND_READ;
 445                 tmp[1] = (char)(send_bits >> 8);        /* high */
 446                 tmp[2] = (char)(send_bits);                     /* low */
 447
 448                 for (i = 0; i < loops; i++) {
 449                         tmp[3 + i] = buffer[bufindex];
 450                         bufindex++;
 451                 }
 452
 453                 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64) {
 454                         /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
 455                         usleep(1);
 456                         int timeout = 0;
 457                         while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1) {
 458                                 timeout++;
 459                                 if (timeout > 10)
 460                                         break;
 461                         }
 462
 463                         for (i = 0; i < loops; i++) {
 464                                 swap = tmp[3 + i];
 465                                 buffer[fillindex++] = swap;
 466                         }
 467                 }
 468         }
 469 }
 470
 471 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char *buffer, int size)
 472 {
 473         char tmp[64];   /* fastes packet size for usb controller */
 474         int send_bits, fillindex = 0, i, loops;
 475
 476         char swap;
 477         /* 61 byte can be transfered (488 bit) */
 478
 479         while (size > 0) {
 480                 if (size > 488) {
 481                         send_bits = 488;
 482                         size = size - 488;
 483                         loops = 61;
 484                 } else {
 485                         send_bits = size;
 486                         loops = size / 8;
 487                         loops++;
 488                         size = 0;
 489                 }
 490                 tmp[0] = WRITE_AND_READ;
 491                 tmp[1] = (char)(send_bits >> 8);        /* high */
 492                 tmp[2] = (char)(send_bits);                     /* low */
 493
 494                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
 495
 496                 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
 497                 int timeout = 0;
 498                 usleep(1);
 499                 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1) {
 500                         timeout++;
 501                         if (timeout > 10)
 502                                 break;
 503                 }
 504
 505                 for (i = 0; i < loops; i++) {
 506                         swap = tmp[3 + i];
 507                         buffer[fillindex++] = swap;
 508                 }
 509         }
 510 }
 511
 512 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char *buffer, int size)
 513 {
 514         char tmp[64];   /* fastes packet size for usb controller */
 515         int send_bits, bufindex = 0, i, loops;
 516
 517         /* 61 byte can be transfered (488 bit) */
 518         while (size > 0) {
 519                 if (size > 488) {
 520                         send_bits = 488;
 521                         size = size - 488;
 522                         loops = 61;
 523                 } else {
 524                         send_bits = size;
 525                         loops = size/8;
 526                         /* if (loops == 0) */
 527                         loops++;
 528                         size = 0;
 529                 }
 530                 tmp[0] = WRITE_TDI;
 531                 tmp[1] = (char)(send_bits >> 8);        /* high */
 532                 tmp[2] = (char)(send_bits);                     /* low */
 533
 534                 for (i = 0; i < loops; i++) {
 535                         tmp[3 + i] = buffer[bufindex];
 536                         bufindex++;
 537                 }
 538                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
 539         }
 540 }
 541
 542 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 543 {
 544         usbprog_jtag_tms_collect(tms_scan);
 545 }
 546
 547 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
 548 {
 549         char tmp[2];
 550         tmp[0] = PORT_DIRECTION;
 551         tmp[1] = (char)direction;
 552         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 553 }
 554
 555 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag, unsigned char value)
 556 {
 557         char tmp[2];
 558         tmp[0] = PORT_SET;
 559         tmp[1] = (char)value;
 560         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 561 }
 562
 563 #if 0
 564 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 565 {
 566         char tmp[2];
 567         tmp[0] = PORT_GET;
 568         tmp[1] = 0x00;
 569         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 570 }
 571 #endif
 572
 573 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag, int bit, int value)
 574 {
 575         char tmp[3];
 576         tmp[0] = PORT_SETBIT;
 577         tmp[1] = (char)bit;
 578         if (value == 1)
 579                 tmp[2] = 0x01;
 580         else
 581                 tmp[2] = 0x00;
 582         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 583 }
 584
 585 #if 0
 586 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 587 {
 588         char tmp[2];
 589         tmp[0] = PORT_GETBIT;
 590         tmp[1] = (char)bit;
 591
 592         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 593                 return 1;
 594         else
 595                 return 0;
 596 }
 597 #endif
 598
 599 static void usbprog_jtag_tms_collect(char tms_scan)
 600 {
 601         tms_chain[tms_chain_index] = tms_scan;
 602         tms_chain_index++;
 603 }
 604
 605 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 606 {
 607         int i;
 608         /* LOG_INFO("TMS SEND"); */
 609         if (tms_chain_index > 0) {
 610                 char tmp[tms_chain_index + 2];
 611                 tmp[0] = WRITE_TMS_CHAIN;
 612                 tmp[1] = (char)(tms_chain_index);
 613                 for (i = 0; i < tms_chain_index + 1; i++)
 614                         tmp[2 + i] = tms_chain[i];
 615                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 616                 tms_chain_index = 0;
 617         }
 618 }
 619
 620 struct jtag_interface usbprog_interface = {
 621         .name = "usbprog",
 622
 623         .execute_queue = usbprog_execute_queue,
 624         .speed = usbprog_speed,
 625         .init = usbprog_init,
 626         .quit = usbprog_quit
 627 };