src/jtag/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 #define INCLUDE_JTAG_INTERFACE_H
  38 #include "jtag.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, u8 *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         u8 *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                                 if (cmd->cmd.runtest->end_state != TAP_INVALID)
 154                                         usbprog_end_state(cmd->cmd.runtest->end_state);
 155                                 usbprog_runtest(cmd->cmd.runtest->num_cycles);
 156                                 break;
 157                         case JTAG_STATEMOVE:
 158 #ifdef _DEBUG_JTAG_IO_
 159                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 160 #endif
 161                                 if (cmd->cmd.statemove->end_state != TAP_INVALID)
 162                                         usbprog_end_state(cmd->cmd.statemove->end_state);
 163                                 usbprog_state_move();
 164                                 break;
 165                         case JTAG_PATHMOVE:
 166 #ifdef _DEBUG_JTAG_IO_
 167                                 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 168                                         cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 169 #endif
 170                                 usbprog_path_move(cmd->cmd.pathmove);
 171                                 break;
 172                         case JTAG_SCAN:
 173 #ifdef _DEBUG_JTAG_IO_
 174                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 175 #endif
 176                                 if (cmd->cmd.scan->end_state != TAP_INVALID)
 177                                         usbprog_end_state(cmd->cmd.scan->end_state);
 178                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 179                                 type = jtag_scan_type(cmd->cmd.scan);
 180                                 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 181                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 182                                         return ERROR_JTAG_QUEUE_FAILED;
 183                                 if (buffer)
 184                                         free(buffer);
 185                                 break;
 186                         case JTAG_SLEEP:
 187 #ifdef _DEBUG_JTAG_IO_
 188                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 189 #endif
 190                                 jtag_sleep(cmd->cmd.sleep->us);
 191                                         break;
 192                         default:
 193                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 194                                 exit(-1);
 195                 }
 196
 197                 cmd = cmd->next;
 198         }
 199
 200         return ERROR_OK;
 201 }
 202
 203 static int usbprog_init(void)
 204 {
 205         usbprog_jtag_handle = usbprog_jtag_open();
 206
 207         tms_chain_index = 0;
 208         if (usbprog_jtag_handle == 0)
 209         {
 210                 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
 211                 return ERROR_JTAG_INIT_FAILED;
 212         }
 213
 214         LOG_INFO("USB JTAG Interface ready!");
 215
 216         usbprog_jtag_init(usbprog_jtag_handle);
 217         usbprog_reset(0, 0);
 218         usbprog_write(0, 0, 0);
 219
 220         return ERROR_OK;
 221 }
 222
 223 static int usbprog_quit(void)
 224 {
 225         return ERROR_OK;
 226 }
 227
 228 /*************** jtag execute commands **********************/
 229 static void usbprog_end_state(tap_state_t state)
 230 {
 231         if (tap_is_state_stable(state))
 232                 tap_set_end_state(state);
 233         else
 234         {
 235                 LOG_ERROR("BUG: %i is not a valid end state", state);
 236                 exit(-1);
 237         }
 238 }
 239
 240 static void usbprog_state_move(void)
 241 {
 242         int i = 0, tms = 0;
 243         u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 244         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 245
 246         usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
 247         for (i = 0; i < tms_count; i++)
 248         {
 249                 tms = (tms_scan >> i) & 1;
 250         }
 251
 252         tap_set_state(tap_get_end_state());
 253 }
 254
 255 static void usbprog_path_move(pathmove_command_t *cmd)
 256 {
 257         int num_states = cmd->num_states;
 258         int state_count;
 259
 260         /* There may be queued transitions, and before following a specified
 261            path, we must flush those queued transitions */
 262         usbprog_jtag_tms_send(usbprog_jtag_handle);
 263
 264         state_count = 0;
 265         while (num_states)
 266         {
 267                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 268                 {
 269                         /* LOG_INFO("1"); */
 270                         usbprog_write(0, 0, 0);
 271                         usbprog_write(1, 0, 0);
 272                 }
 273                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 274                 {
 275                         /* LOG_INFO("2"); */
 276                         usbprog_write(0, 1, 0);
 277                         usbprog_write(1, 1, 0);
 278                 }
 279                 else
 280                 {
 281                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 282                         exit(-1);
 283                 }
 284
 285                 tap_set_state(cmd->path[state_count]);
 286                 state_count++;
 287                 num_states--;
 288         }
 289
 290         tap_set_end_state(tap_get_state());
 291 }
 292
 293 static void usbprog_runtest(int num_cycles)
 294 {
 295         int i;
 296
 297         /* only do a state_move when we're not already in IDLE */
 298         if (tap_get_state() != TAP_IDLE)
 299         {
 300                 usbprog_end_state(TAP_IDLE);
 301                 usbprog_state_move();
 302         }
 303
 304         /* execute num_cycles */
 305         if (num_cycles > 0)
 306         {
 307                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 308                 usbprog_write(0, 0, 0);
 309         }
 310         else
 311         {
 312                 usbprog_jtag_tms_send(usbprog_jtag_handle);
 313                 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
 314         }
 315
 316         for (i = 0; i < num_cycles; i++)
 317         {
 318                 usbprog_write(1, 0, 0);
 319                 usbprog_write(0, 0, 0);
 320         }
 321
 322 #ifdef _DEBUG_JTAG_IO_
 323         LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
 324 #endif
 325
 326         /* finish in end_state */
 327         /*
 328         usbprog_end_state(saved_end_state);
 329         if (tap_get_state() != tap_get_end_state())
 330                 usbprog_state_move();
 331         */
 332 }
 333
 334 static void usbprog_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 335 {
 336         tap_state_t saved_end_state = tap_get_end_state();
 337
 338         if (ir_scan)
 339                 usbprog_end_state(TAP_IRSHIFT);
 340         else
 341                 usbprog_end_state(TAP_DRSHIFT);
 342
 343         /* Only move if we're not already there */
 344         if (tap_get_state() != tap_get_end_state())
 345                 usbprog_state_move();
 346
 347         usbprog_end_state(saved_end_state);
 348
 349         usbprog_jtag_tms_send(usbprog_jtag_handle);
 350
 351         void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
 352         switch (type) {
 353         case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
 354         case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
 355         case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
 356         default:
 357                 LOG_ERROR("unknown scan type: %i", type);
 358                 exit(-1);
 359         }
 360         f(usbprog_jtag_handle, (char *)buffer, scan_size);
 361
 362         /* The adapter does the transition to PAUSE internally */
 363         if (ir_scan)
 364                 tap_set_state(TAP_IRPAUSE);
 365         else
 366                 tap_set_state(TAP_DRPAUSE);
 367
 368         if (tap_get_state() != tap_get_end_state())
 369                 usbprog_state_move();
 370 }
 371
 372 /*************** jtag wrapper functions *********************/
 373
 374 static void usbprog_write(int tck, int tms, int tdi)
 375 {
 376         unsigned char output_value=0x00;
 377
 378         if (tms)
 379                 output_value |= (1<<TMS_BIT);
 380         if (tdi)
 381                 output_value |= (1<<TDI_BIT);
 382         if (tck)
 383                 output_value |= (1<<TCK_BIT);
 384
 385         usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
 386 }
 387
 388 /* (1) assert or (0) deassert reset lines */
 389 static void usbprog_reset(int trst, int srst)
 390 {
 391         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 392
 393         if (trst)
 394                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
 395         else
 396                 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
 397
 398         if (srst)
 399                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
 400         else
 401                 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
 402 }
 403
 404 /*************** jtag lowlevel functions ********************/
 405
 406 struct usb_bus *busses;
 407
 408 struct usbprog_jtag* usbprog_jtag_open(void)
 409 {
 410         struct usb_bus *bus;
 411         struct usb_device *dev;
 412
 413         struct usbprog_jtag *tmp;
 414
 415         tmp = (struct usbprog_jtag*)malloc(sizeof(struct usbprog_jtag));
 416
 417         usb_set_debug(10);
 418         usb_init();
 419         usb_find_busses();
 420         usb_find_devices();
 421
 422         busses = usb_get_busses();
 423
 424         /* find usbprog_jtag device in usb bus */
 425
 426         for (bus = busses; bus; bus = bus->next)
 427         {
 428                 for (dev = bus->devices; dev; dev = dev->next)
 429                 {
 430                         /* condition for sucessfully hit (too bad, I only check the vendor id)*/
 431                         if (dev->descriptor.idVendor == VID && dev->descriptor.idProduct == PID)
 432                         {
 433                                 tmp->usb_handle = usb_open(dev);
 434                                 usb_set_configuration(tmp->usb_handle, 1);
 435                                 usb_claim_interface(tmp->usb_handle, 0);
 436                                 usb_set_altinterface(tmp->usb_handle, 0);
 437                                 return tmp;
 438                         }
 439                 }
 440         }
 441         return 0;
 442 }
 443
 444 #if 0
 445 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
 446 {
 447         usb_close(usbprog_jtag->usb_handle);
 448         free(usbprog_jtag);
 449 }
 450 #endif
 451
 452 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
 453 {
 454         int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
 455         if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
 456                         (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
 457                 return 1;
 458         if (res == msglen)
 459         {
 460                 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
 461                 res =  usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
 462                 if (res > 0)
 463                         return (unsigned char)msg[1];
 464                 else
 465                         return -1;
 466         }
 467         else
 468                 return -1;
 469         return 0;
 470 }
 471
 472 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
 473 {
 474         usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
 475 }
 476
 477 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 478 {
 479         char tmp[64];   /* fastes packet size for usb controller */
 480         int send_bits, bufindex = 0, fillindex = 0, i, loops;
 481
 482         char swap;
 483         /* 61 byte can be transfered (488 bit) */
 484
 485         while (size > 0)
 486         {
 487                 if (size > 488)
 488                 {
 489                         send_bits = 488;
 490                         size = size - 488;
 491                         loops = 61;
 492                 }
 493                 else
 494                 {
 495                         send_bits = size;
 496                         loops = size / 8;
 497                         loops++;
 498                         size = 0;
 499                 }
 500                 tmp[0] = WRITE_AND_READ;
 501                 tmp[1] = (char)(send_bits >> 8);        /* high */
 502                 tmp[2] = (char)(send_bits);                     /* low */
 503                 i = 0;
 504
 505                 for (i = 0; i < loops; i++)
 506                 {
 507                         tmp[3 + i] = buffer[bufindex];
 508                         bufindex++;
 509                 }
 510
 511                 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
 512                 {
 513                         /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
 514                         usleep(1);
 515                         int timeout = 0;
 516                         while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
 517                         {
 518                                 timeout++;
 519                                 if (timeout > 10)
 520                                         break;
 521                         }
 522
 523                         for (i = 0; i < loops; i++)
 524                         {
 525                                 swap =  tmp[3 + i];
 526                                 buffer[fillindex++] = swap;
 527                         }
 528                 }
 529         }
 530 }
 531
 532 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 533 {
 534         char tmp[64];   /* fastes packet size for usb controller */
 535         int send_bits, fillindex = 0, i, loops;
 536
 537         char swap;
 538         /* 61 byte can be transfered (488 bit) */
 539
 540         while (size > 0)
 541         {
 542                 if (size > 488)
 543                 {
 544                         send_bits = 488;
 545                         size = size - 488;
 546                         loops = 61;
 547                 }
 548                 else
 549                 {
 550                         send_bits = size;
 551                         loops = size / 8;
 552                         loops++;
 553                         size = 0;
 554                 }
 555                 tmp[0] = WRITE_AND_READ;
 556                 tmp[1] = (char)(send_bits >> 8);        /* high */
 557                 tmp[2] = (char)(send_bits);                     /* low */
 558
 559                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
 560
 561                 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
 562                 int timeout = 0;
 563                 usleep(1);
 564                 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
 565                 {
 566                         timeout++;
 567                         if (timeout > 10)
 568                                 break;
 569                 }
 570
 571                 for (i = 0; i < loops; i++)
 572                 {
 573                         swap = tmp[3 + i];
 574                         buffer[fillindex++] = swap;
 575                 }
 576         }
 577 }
 578
 579 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
 580 {
 581         char tmp[64];   /* fastes packet size for usb controller */
 582         int send_bits, bufindex = 0, i, loops;
 583
 584         /* 61 byte can be transfered (488 bit) */
 585         while (size > 0)
 586         {
 587                 if (size > 488)
 588                 {
 589                         send_bits = 488;
 590                         size = size - 488;
 591                         loops = 61;
 592                 }
 593                 else
 594                 {
 595                         send_bits = size;
 596                         loops = size/8;
 597                         /* if(loops==0) */
 598                         loops++;
 599                         size = 0;
 600                 }
 601                 tmp[0] = WRITE_TDI;
 602                 tmp[1] = (char)(send_bits >> 8);        /* high */
 603                 tmp[2] = (char)(send_bits);                     /* low */
 604                 i = 0;
 605
 606                 for (i = 0; i < loops; i++)
 607                 {
 608                         tmp[3 + i] = buffer[bufindex];
 609                         bufindex++;
 610                 }
 611                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
 612         }
 613 }
 614
 615 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
 616 {
 617         usbprog_jtag_tms_collect(tms_scan);
 618 }
 619
 620 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
 621 {
 622         char tmp[2];
 623         tmp[0] = PORT_DIRECTION;
 624         tmp[1] = (char)direction;
 625         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 626 }
 627
 628 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
 629 {
 630         char tmp[2];
 631         tmp[0] = PORT_SET;
 632         tmp[1] = (char)value;
 633         usbprog_jtag_message(usbprog_jtag, tmp, 2);
 634 }
 635
 636 #if 0
 637 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
 638 {
 639         char tmp[2];
 640         tmp[0] = PORT_GET;
 641         tmp[1] = 0x00;
 642         return usbprog_jtag_message(usbprog_jtag, tmp, 2);
 643 }
 644 #endif
 645
 646 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
 647 {
 648         char tmp[3];
 649         tmp[0] = PORT_SETBIT;
 650         tmp[1] = (char)bit;
 651         if (value == 1)
 652                 tmp[2] = 0x01;
 653         else
 654                 tmp[2] = 0x00;
 655         usbprog_jtag_message(usbprog_jtag, tmp, 3);
 656 }
 657
 658 #if 0
 659 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
 660 {
 661         char tmp[2];
 662         tmp[0] = PORT_GETBIT;
 663         tmp[1] = (char)bit;
 664
 665         if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
 666                 return 1;
 667         else
 668                 return 0;
 669 }
 670 #endif
 671
 672 static void usbprog_jtag_tms_collect(char tms_scan)
 673 {
 674         tms_chain[tms_chain_index] = tms_scan;
 675         tms_chain_index++;
 676 }
 677
 678 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
 679 {
 680         int i;
 681         /* LOG_INFO("TMS SEND"); */
 682         if (tms_chain_index > 0)
 683         {
 684                 char tmp[tms_chain_index + 2];
 685                 tmp[0] = WRITE_TMS_CHAIN;
 686                 tmp[1] = (char)(tms_chain_index);
 687                 for (i = 0; i < tms_chain_index + 1; i++)
 688                         tmp[2 + i] = tms_chain[i];
 689                 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
 690                 tms_chain_index = 0;
 691         }
 692 }