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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 "interface.h"
  38 #include "commands.h"
  39
  40 #include <usb.h>
  41
  42
  43 #define VID 0x1781
  44 #define PID 0x0c63
  45
  46 /* Pins at usbprog */
  47 #define TDO_BIT                 0
  48 #define TDI_BIT                 3
  49 #define TCK_BIT                 2
  50 #define TMS_BIT                 1
  51
  52 static int usbprog_execute_queue(void);
  53 static int usbprog_speed(int speed);
  54 static int usbprog_register_commands(struct command_context_s *cmd_ctx);
  55 static int usbprog_init(void);
  56 static int usbprog_quit(void);
  57
  58 static void usbprog_end_state(tap_state_t state);
  59 static void usbprog_state_move(void);
  60 static void usbprog_path_move(pathmove_command_t *cmd);
  61 static void usbprog_runtest(int num_cycles);
  62 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size);
  63
  64 jtag_interface_t usbprog_interface =
  65 {
  66         .name = "usbprog",
  67         .execute_queue = usbprog_execute_queue,
  68         .speed = usbprog_speed,
  69         .register_commands = usbprog_register_commands,
  70         .init = usbprog_init,
  71         .quit = usbprog_quit
  72 };
  73
  74 #define UNKOWN_COMMAND  0x00
  75 #define PORT_DIRECTION  0x01
  76 #define PORT_SET                0x02
  77 #define PORT_GET                0x03
  78 #define PORT_SETBIT             0x04
  79 #define PORT_GETBIT             0x05
  80 #define WRITE_TDI               0x06
  81 #define READ_TDO                0x07
  82 #define WRITE_AND_READ  0x08
  83 #define WRITE_TMS               0x09
  84 #define WRITE_TMS_CHAIN 0x0A
  85
  86 struct usbprog_jtag
  87 {
  88         struct usb_dev_handle* usb_handle;
  89 };
  90
  91 static struct usbprog_jtag * usbprog_jtag_handle;
  92
  93 static struct usbprog_jtag* usbprog_jtag_open(void);
  94 //static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
  95 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
  96 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
  97
  98 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
  99 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 100 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 101 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
 102
 103 static char tms_chain[64];
 104 static int tms_chain_index;
 105
 106 static void usbprog_jtag_tms_collect(char tms_scan);
 107 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
 108
 109 static void usbprog_write(int tck, int tms, int tdi);
 110 static void usbprog_reset(int trst, int srst);
 111
 112 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
 113 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
 114 //static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
 115 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
 116 //static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
 117
 118 static int usbprog_speed(int speed)
 119 {
 120         return ERROR_OK;
 121 }
 122
 123 static int usbprog_register_commands(struct command_context_s *cmd_ctx)
 124 {
 125         return ERROR_OK;
 126 }
 127
 128 static int usbprog_execute_queue(void)
 129 {
 130         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 131         int scan_size;
 132         enum scan_type type;
 133         uint8_t *buffer;
 134
 135         while (cmd)
 136         {
 137                 switch (cmd->type)
 138                 {
 139                         case JTAG_RESET:
 140 #ifdef _DEBUG_JTAG_IO_
 141                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 142 #endif
 143                                 if (cmd->cmd.reset->trst == 1)
 144                                 {
 145                                         tap_set_state(TAP_RESET);
 146                                 }
 147                                 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 148                                 break;
 149                         case JTAG_RUNTEST:
 150 #ifdef _DEBUG_JTAG_IO_
 151                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 152 #endif
 153                                 usbprog_end_state(cmd->cmd.runtest->end_state);
 154                                 usbprog_runtest(cmd->cmd.runtest->num_cycles);
 155                                 break;
 156                         case JTAG_STATEMOVE:
 157 #ifdef _DEBUG_JTAG_IO_
 158                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 159 #endif
 160                                 usbprog_end_state(cmd->cmd.statemove->end_state);
 161                                 usbprog_state_move();
 162                                 break;
 163                         case JTAG_PATHMOVE:
 164 #ifdef _DEBUG_JTAG_IO_
 165                                 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 166                                         cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 167 #endif
 168                                 usbprog_path_move(cmd->cmd.pathmove);
 169                                 break;
 170                         case JTAG_SCAN:
 171 #ifdef _DEBUG_JTAG_IO_
 172                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 173 #endif
 174                                 usbprog_end_state(cmd->cmd.scan->end_state);
 175                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 176                                 type = jtag_scan_type(cmd->cmd.scan);
 177                                 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 178                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 179                                         return ERROR_JTAG_QUEUE_FAILED;
 180                                 if (buffer)
 181                                         free(buffer);
 182                                 break;
 183                         case JTAG_SLEEP:
 184 #ifdef _DEBUG_JTAG_IO_
 185                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 186 #endif
 187                                 jtag_sleep(cmd->cmd.sleep->us);
 188                                         break;
 189                         default:
 190                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 191                                 exit(-1);
 192                 }
 193
 194                 cmd = cmd->next;
 195         }
 196
 197         return ERROR_OK;
 198 }
 199
 200 static int usbprog_init(void)
 201 {
 202         usbprog_jtag_handle = usbprog_jtag_open();
 203
 204         tms_chain_index = 0;
 205         if (usbprog_jtag_handle == 0)
 206         {
 207                 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 208                 return ERROR_JTAG_INIT_FAILED;
 209         }
 210
 211         LOG_INFO("USB JTAG Interface ready!");
 212
 213         usbprog_jtag_init(usbprog_jtag_handle);
 214         usbprog_reset(0, 0);
 215         usbprog_write(0, 0, 0);
 216
 217         return ERROR_OK;
 218 }
 219
 220 static int usbprog_quit(void)
 221 {
 222         return ERROR_OK;
 223 }
 224
 225 /*************** jtag execute commands **********************/
 226 static void usbprog_end_state(tap_state_t state)
 227 {
 228         if (tap_is_state_stable(state))
 229                 tap_set_end_state(state);
 230         else
 231         {
 232                 LOG_ERROR("BUG: %i is not a valid end state", state);
 233                 exit(-1);
 234         }
 235 }
 236
 237 static void usbprog_state_move(void)
 238 {
 239         int i = 0, tms = 0;
 240         uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 241         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 242
 243         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 244         for (i = 0; i < tms_count; i++)
 245         {
 246                 tms = (tms_scan >> i) & 1;
 247         }
 248
 249         tap_set_state(tap_get_end_state());
 250 }
 251
 252 static void usbprog_path_move(pathmove_command_t *cmd)
 253 {
 254         int num_states = cmd->num_states;
 255         int state_count;
 256
 257         /* There may be queued transitions, and before following a specified
 258            path, we must flush those queued transitions */
 259         usbprog_jtag_tms_send(usbprog_jtag_handle);
 260
 261         state_count = 0;
 262         while (num_states)
 263         {
 264                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 265                 {
 266                         /* LOG_INFO("1"); */
 267                         usbprog_write(0, 0, 0);
 268                         usbprog_write(1, 0, 0);
 269                 }
 270                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 271                 {
 272                         /* LOG_INFO("2"); */
 273                         usbprog_write(0, 1, 0);
 274                         usbprog_write(1, 1, 0);
 275                 }
 276                 else
 277                 {
 278                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 279                         exit(-1);
 280                 }
 281
 282                 tap_set_state(cmd->path[state_count]);
 283                 state_count++;
 284                 num_states--;
 285         }
 286
 287         tap_set_end_state(tap_get_state());
 288 }
 289
 290 static void usbprog_runtest(int num_cycles)
 291 {
 292         int i;
 293
 294         /* only do a state_move when we're not already in IDLE */
 295         if (tap_get_state() != TAP_IDLE)
 296         {
 297                 usbprog_end_state(TAP_IDLE);
 298                 usbprog_state_move();
 299         }
 300
 301         /* execute num_cycles */
 302         if (num_cycles > 0)
 303         {
 304                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 305                 usbprog_write(0, 0, 0);
 306         }
 307         else
 308         {
 309                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 310                 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
 311         }
 312
 313         for (i = 0; i < num_cycles; i++)
 314         {
 315                 usbprog_write(1, 0, 0);
 316                 usbprog_write(0, 0, 0);
 317         }
 318
 319 #ifdef _DEBUG_JTAG_IO_
 320         LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
 321 #endif
 322
 323         /* finish in end_state */
 324         /*
 325         usbprog_end_state(saved_end_state);
 326         if (tap_get_state() != tap_get_end_state())
 327                 usbprog_state_move();
 328         */
 329 }
 330
 331 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 332 {
 333         tap_state_t saved_end_state = tap_get_end_state();
 334
 335         if (ir_scan)
 336                 usbprog_end_state(TAP_IRSHIFT);
 337         else
 338                 usbprog_end_state(TAP_DRSHIFT);
 339
 340         /* Only move if we're not already there */
 341         if (tap_get_state() != tap_get_end_state())
 342                 usbprog_state_move();
 343
 344         usbprog_end_state(saved_end_state);
 345
 346         usbprog_jtag_tms_send(usbprog_jtag_handle);
 347
 348         void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 349         switch (type) {
 350         case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
 351         case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
 352         case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
 353         default:
 354                 LOG_ERROR("unknown scan type: %i", type);
 355                 exit(-1);
 356         }
 357         f(usbprog_jtag_handle, (char *)buffer, scan_size);
 358
 359         /* The adapter does the transition to PAUSE internally */
 360         if (ir_scan)
 361                 tap_set_state(TAP_IRPAUSE);
 362         else
 363                 tap_set_state(TAP_DRPAUSE);
 364
 365         if (tap_get_state() != tap_get_end_state())
 366                 usbprog_state_move();
 367 }
 368
 369 /*************** jtag wrapper functions *********************/
 370
 371 static void usbprog_write(int tck, int tms, int tdi)
 372 {
 373         unsigned char output_value=0x00;
 374
 375         if (tms)
 376                 output_value |= (1<<TMS_BIT);
 377         if (tdi)
 378                 output_value |= (1<<TDI_BIT);
 379         if (tck)
 380                 output_value |= (1<<TCK_BIT);
 381
 382         usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
 383 }
 384
 385 /* (1) assert or (0) deassert reset lines */
 386 static void usbprog_reset(int trst, int srst)
 387 {
 388         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 389
 390         if (trst)
 391                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 392         else
 393                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 394
 395         if (srst)
 396                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 397         else
 398                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 399 }
 400
 401 /*************** jtag lowlevel functions ********************/
 402
 403 struct usb_bus *busses;
 404
 405 struct usbprog_jtag* usbprog_jtag_open(void)
 406 {
 407         struct usb_bus *bus;
 408         struct usb_device *dev;
 409
 410         struct usbprog_jtag *tmp;
 411
 412         tmp = (struct usbprog_jtag*)malloc(sizeof(struct usbprog_jtag));
 413
 414         usb_set_debug(10);
 415         usb_init();
 416         usb_find_busses();
 417         usb_find_devices();
 418
 419         busses = usb_get_busses();
 420
 421         /* find usbprog_jtag device in usb bus */
 422
 423         for (bus = busses; bus; bus = bus->next)
 424         {
 425                 for (dev = bus->devices; dev; dev = dev->next)
 426                 {
 427                         /* condition for sucessfully hit (too bad, I only check the vendor id)*/
 428                         if (dev->descriptor.idVendor == VID && dev->descriptor.idProduct == PID)
 429                         {
 430                                 tmp->usb_handle = usb_open(dev);
 431                                 usb_set_configuration(tmp->usb_handle, 1);
 432                                 usb_claim_interface(tmp->usb_handle, 0);
 433                                 usb_set_altinterface(tmp->usb_handle, 0);
 434                                 return tmp;
 435                         }
 436                 }
 437         }
 438         return 0;
 439 }
 440
 441 #if 0
 442 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 443 {
 444         usb_close(usbprog_jtag->usb_handle);
 445         free(usbprog_jtag);
 446 }
 447 #endif
 448
 449 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
 450 {
 451         int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
 452         if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
 453                         (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
 454                 return 1;
 455         if (res == msglen)
 456         {
 457                 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
 458                 res =  usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
 459                 if (res > 0)
 460                         return (unsigned char)msg[1];
 461                 else
 462                         return -1;
 463         }
 464         else
 465                 return -1;
 466         return 0;
 467 }
 468
 469 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 470 {
 471         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 472 }
 473
 474 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 475 {
 476         char tmp[64];   /* fastes packet size for usb controller */
 477         int send_bits, bufindex = 0, fillindex = 0, i, loops;
 478
 479         char swap;
 480         /* 61 byte can be transfered (488 bit) */
 481
 482         while (size > 0)
 483         {
 484                 if (size > 488)
 485                 {
 486                         send_bits = 488;
 487                         size = size - 488;
 488                         loops = 61;
 489                 }
 490                 else
 491                 {
 492                         send_bits = size;
 493                         loops = size / 8;
 494                         loops++;
 495                         size = 0;
 496                 }
 497                 tmp[0] = WRITE_AND_READ;
 498                 tmp[1] = (char)(send_bits >> 8);        /* high */
 499                 tmp[2] = (char)(send_bits);                     /* low */
 500                 i = 0;
 501
 502                 for (i = 0; i < loops; i++)
 503                 {
 504                         tmp[3 + i] = buffer[bufindex];
 505                         bufindex++;
 506                 }
 507
 508                 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
 509                 {
 510                         /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
 511                         usleep(1);
 512                         int timeout = 0;
 513                         while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
 514                         {
 515                                 timeout++;
 516                                 if (timeout > 10)
 517                                         break;
 518                         }
 519
 520                         for (i = 0; i < loops; i++)
 521                         {
 522                                 swap =  tmp[3 + i];
 523                                 buffer[fillindex++] = swap;
 524                         }
 525                 }
 526         }
 527 }
 528
 529 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 530 {
 531         char tmp[64];   /* fastes packet size for usb controller */
 532         int send_bits, fillindex = 0, i, loops;
 533
 534         char swap;
 535         /* 61 byte can be transfered (488 bit) */
 536
 537         while (size > 0)
 538         {
 539                 if (size > 488)
 540                 {
 541                         send_bits = 488;
 542                         size = size - 488;
 543                         loops = 61;
 544                 }
 545                 else
 546                 {
 547                         send_bits = size;
 548                         loops = size / 8;
 549                         loops++;
 550                         size = 0;
 551                 }
 552                 tmp[0] = WRITE_AND_READ;
 553                 tmp[1] = (char)(send_bits >> 8);        /* high */
 554                 tmp[2] = (char)(send_bits);                     /* low */
 555
 556                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
 557
 558                 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
 559                 int timeout = 0;
 560                 usleep(1);
 561                 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
 562                 {
 563                         timeout++;
 564                         if (timeout > 10)
 565                                 break;
 566                 }
 567
 568                 for (i = 0; i < loops; i++)
 569                 {
 570                         swap = tmp[3 + i];
 571                         buffer[fillindex++] = swap;
 572                 }
 573         }
 574 }
 575
 576 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 577 {
 578         char tmp[64];   /* fastes packet size for usb controller */
 579         int send_bits, bufindex = 0, i, loops;
 580
 581         /* 61 byte can be transfered (488 bit) */
 582         while (size > 0)
 583         {
 584                 if (size > 488)
 585                 {
 586                         send_bits = 488;
 587                         size = size - 488;
 588                         loops = 61;
 589                 }
 590                 else
 591                 {
 592                         send_bits = size;
 593                         loops = size/8;
 594                         /* if(loops==0) */
 595                         loops++;
 596                         size = 0;
 597                 }
 598                 tmp[0] = WRITE_TDI;
 599                 tmp[1] = (char)(send_bits >> 8);        /* high */
 600                 tmp[2] = (char)(send_bits);                     /* low */
 601                 i = 0;
 602
 603                 for (i = 0; i < loops; i++)
 604                 {
 605                         tmp[3 + i] = buffer[bufindex];
 606                         bufindex++;
 607                 }
 608                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
 609         }
 610 }
 611
 612 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 613 {
 614         usbprog_jtag_tms_collect(tms_scan);
 615 }
 616
 617 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
 618 {
 619         char tmp[2];
 620         tmp[0] = PORT_DIRECTION;
 621         tmp[1] = (char)direction;
 622         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 623 }
 624
 625 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
 626 {
 627         char tmp[2];
 628         tmp[0] = PORT_SET;
 629         tmp[1] = (char)value;
 630         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 631 }
 632
 633 #if 0
 634 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 635 {
 636         char tmp[2];
 637         tmp[0] = PORT_GET;
 638         tmp[1] = 0x00;
 639         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 640 }
 641 #endif
 642
 643 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
 644 {
 645         char tmp[3];
 646         tmp[0] = PORT_SETBIT;
 647         tmp[1] = (char)bit;
 648         if (value == 1)
 649                 tmp[2] = 0x01;
 650         else
 651                 tmp[2] = 0x00;
 652         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 653 }
 654
 655 #if 0
 656 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 657 {
 658         char tmp[2];
 659         tmp[0] = PORT_GETBIT;
 660         tmp[1] = (char)bit;
 661
 662         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 663                 return 1;
 664         else
 665                 return 0;
 666 }
 667 #endif
 668
 669 static void usbprog_jtag_tms_collect(char tms_scan)
 670 {
 671         tms_chain[tms_chain_index] = tms_scan;
 672         tms_chain_index++;
 673 }
 674
 675 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 676 {
 677         int i;
 678         /* LOG_INFO("TMS SEND"); */
 679         if (tms_chain_index > 0)
 680         {
 681                 char tmp[tms_chain_index + 2];
 682                 tmp[0] = WRITE_TMS_CHAIN;
 683                 tmp[1] = (char)(tms_chain_index);
 684                 for (i = 0; i < tms_chain_index + 1; i++)
 685                         tmp[2 + i] = tms_chain[i];
 686                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 687                 tms_chain_index = 0;
 688         }
 689 }