git.sur5r.net Git - openocd/blob - src/jtag/zy1000.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007-2008 by Øyvind Harboe                              *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "embeddedice.h"
  24 #include "bitbang.h"
  25
  26 #include <cyg/hal/hal_io.h>             // low level i/o
  27 #include <cyg/hal/hal_diag.h>
  28
  29
  30 #define ZYLIN_VERSION "1.52"
  31 #define ZYLIN_DATE __DATE__
  32 #define ZYLIN_TIME __TIME__
  33 #define ZYLIN_OPENOCD "$Revision$"
  34 #define ZYLIN_OPENOCD_VERSION "Zylin JTAG ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE " " ZYLIN_TIME
  35 const char *zylin_config_dir="/config/settings";
  36
  37 /* low level command set
  38  */
  39 int zy1000_read(void);
  40 static void zy1000_write(int tck, int tms, int tdi);
  41 void zy1000_reset(int trst, int srst);
  42
  43
  44 int zy1000_speed(int speed);
  45 int zy1000_register_commands(struct command_context_s *cmd_ctx);
  46 int zy1000_init(void);
  47 int zy1000_quit(void);
  48
  49 /* interface commands */
  50 int zy1000_handle_zy1000_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  51
  52 static int zy1000_khz(int khz, int *jtag_speed)
  53 {
  54         if (khz==0)
  55         {
  56                 *jtag_speed=0;
  57         }
  58         else
  59         {
  60                 *jtag_speed=64000/khz;
  61         }
  62         return ERROR_OK;
  63 }
  64
  65 static int zy1000_speed_div(int speed, int *khz)
  66 {
  67         if (speed==0)
  68         {
  69                 *khz = 0;
  70         }
  71         else
  72         {
  73                 *khz=64000/speed;
  74         }
  75
  76         return ERROR_OK;
  77 }
  78
  79 static bool readPowerDropout(void)
  80 {
  81         cyg_uint32 state;
  82         // sample and clear power dropout
  83         HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x80);
  84         HAL_READ_UINT32(ZY1000_JTAG_BASE+0x10, state);
  85         bool powerDropout;
  86         powerDropout = (state & 0x80) != 0;
  87         return powerDropout;
  88 }
  89
  90
  91 static bool readSRST(void)
  92 {
  93         cyg_uint32 state;
  94         // sample and clear SRST sensing
  95         HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x00000040);
  96         HAL_READ_UINT32(ZY1000_JTAG_BASE+0x10, state);
  97         bool srstAsserted;
  98         srstAsserted = (state & 0x40) != 0;
  99         return srstAsserted;
 100 }
 101
 102 static int zy1000_srst_asserted(int *srst_asserted)
 103 {
 104         *srst_asserted=readSRST();
 105         return ERROR_OK;
 106 }
 107
 108 static int zy1000_power_dropout(int *dropout)
 109 {
 110         *dropout=readPowerDropout();
 111         return ERROR_OK;
 112 }
 113
 114
 115 jtag_interface_t zy1000_interface =
 116 {
 117         .name = "ZY1000",
 118         .execute_queue = bitbang_execute_queue,
 119         .speed = zy1000_speed,
 120         .register_commands = zy1000_register_commands,
 121         .init = zy1000_init,
 122         .quit = zy1000_quit,
 123         .khz = zy1000_khz,
 124         .speed_div = zy1000_speed_div,
 125         .power_dropout = zy1000_power_dropout,
 126         .srst_asserted = zy1000_srst_asserted,
 127 };
 128
 129 bitbang_interface_t zy1000_bitbang =
 130 {
 131         .read = zy1000_read,
 132         .write = zy1000_write,
 133         .reset = zy1000_reset
 134 };
 135
 136
 137
 138 static void zy1000_write(int tck, int tms, int tdi)
 139 {
 140
 141 }
 142
 143 int zy1000_read(void)
 144 {
 145         return -1;
 146 }
 147
 148 extern bool readSRST(void);
 149
 150 void zy1000_reset(int trst, int srst)
 151 {
 152         LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst);
 153         if(!srst)
 154         {
 155                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x00000001);
 156         }
 157         else
 158         {
 159                 /* Danger!!! if clk!=0 when in
 160                  * idle in TAP_IDLE, reset halt on str912 will fail.
 161                  */
 162                 ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x00000001);
 163         }
 164
 165         if(!trst)
 166         {
 167                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x00000002);
 168         }
 169         else
 170         {
 171                 /* assert reset */
 172                 ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x00000002);
 173         }
 174
 175         if (trst||(srst&&(jtag_reset_config & RESET_SRST_PULLS_TRST)))
 176         {
 177                 waitIdle();
 178                 /* we're now in the RESET state until trst is deasserted */
 179                 ZY1000_POKE(ZY1000_JTAG_BASE+0x20, TAP_RESET);
 180         } else
 181         {
 182                 /* We'll get RCLK failure when we assert TRST, so clear any false positives here */
 183                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x400);
 184         }
 185
 186         /* wait for srst to float back up */
 187         if (!srst)
 188         {
 189                 int i;
 190                 for (i=0; i<1000; i++)
 191                 {
 192                         // We don't want to sense our own reset, so we clear here.
 193                         // There is of course a timing hole where we could loose
 194                         // a "real" reset.
 195                         if (!readSRST())
 196                                 break;
 197
 198                         /* wait 1ms */
 199                         alive_sleep(1);
 200                 }
 201
 202                 if (i==1000)
 203                 {
 204                         LOG_USER("SRST didn't deassert after %dms", i);
 205                 } else if (i>1)
 206                 {
 207                         LOG_USER("SRST took %dms to deassert", i);
 208                 }
 209         }
 210 }
 211
 212 int zy1000_speed(int speed)
 213 {
 214         if(speed == 0)
 215         {
 216                 /*0 means RCLK*/
 217                 speed = 0;
 218                 ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x100);
 219                 LOG_DEBUG("jtag_speed using RCLK");
 220         }
 221         else
 222         {
 223                 if(speed > 8190 || speed < 2)
 224                 {
 225                         LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz");
 226                         return ERROR_INVALID_ARGUMENTS;
 227                 }
 228
 229                 LOG_USER("jtag_speed %d => JTAG clk=%f", speed, 64.0/(float)speed);
 230                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x100);
 231                 ZY1000_POKE(ZY1000_JTAG_BASE+0x1c, speed&~1);
 232         }
 233         return ERROR_OK;
 234 }
 235
 236 static bool savePower;
 237
 238
 239 static void setPower(bool power)
 240 {
 241         savePower = power;
 242         if (power)
 243         {
 244                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x14, 0x8);
 245         } else
 246         {
 247                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x8);
 248         }
 249 }
 250
 251 int handle_power_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 252 {
 253         if (argc > 1)
 254         {
 255                 return ERROR_INVALID_ARGUMENTS;
 256         }
 257
 258         if (argc == 1)
 259         {
 260                 if (strcmp(args[0], "on") == 0)
 261                 {
 262                         setPower(1);
 263                 }
 264                 else if (strcmp(args[0], "off") == 0)
 265                 {
 266                         setPower(0);
 267                 } else
 268                 {
 269                         command_print(cmd_ctx, "arg is \"on\" or \"off\"");
 270                         return ERROR_INVALID_ARGUMENTS;
 271                 }
 272         }
 273
 274         command_print(cmd_ctx, "Target power %s", savePower ? "on" : "off");
 275
 276         return ERROR_OK;
 277 }
 278
 279
 280 /* Give TELNET a way to find out what version this is */
 281 static int jim_zy1000_version(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 282 {
 283         if ((argc < 1) || (argc > 2))
 284                 return JIM_ERR;
 285         char buff[128];
 286         const char *version_str=NULL;
 287
 288         if (argc == 1)
 289         {
 290                 version_str=ZYLIN_OPENOCD_VERSION;
 291         } else
 292         {
 293                 const char *str = Jim_GetString(argv[1], NULL);
 294                 if (strcmp("openocd", str) == 0)
 295                 {
 296                         int revision;
 297                         revision = atol(ZYLIN_OPENOCD+strlen("XRevision: "));
 298                         sprintf(buff, "%d", revision);
 299                         version_str=buff;
 300                 }
 301                 else if (strcmp("zy1000", str) == 0)
 302                 {
 303                         version_str=ZYLIN_VERSION;
 304                 }
 305                 else if (strcmp("date", str) == 0)
 306                 {
 307                         version_str=ZYLIN_DATE;
 308                 }
 309                 else
 310                 {
 311                         return JIM_ERR;
 312                 }
 313         }
 314
 315         Jim_SetResult(interp, Jim_NewStringObj(interp, version_str, -1));
 316
 317         return JIM_OK;
 318 }
 319
 320
 321 static int
 322 zylinjtag_Jim_Command_powerstatus(Jim_Interp *interp,
 323                                                                    int argc,
 324                 Jim_Obj * const *argv)
 325 {
 326         if (argc != 1)
 327         {
 328                 Jim_WrongNumArgs(interp, 1, argv, "powerstatus");
 329                 return JIM_ERR;
 330         }
 331
 332         cyg_uint32 status;
 333         ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, status);
 334
 335         Jim_SetResult(interp, Jim_NewIntObj(interp, (status&0x80)!=0));
 336
 337         return JIM_OK;
 338 }
 339
 340 int zy1000_register_commands(struct command_context_s *cmd_ctx)
 341 {
 342         register_command(cmd_ctx, NULL, "power", handle_power_command, COMMAND_ANY,
 343                         "power <on/off> - turn power switch to target on/off. No arguments - print status.");
 344
 345         Jim_CreateCommand(interp, "zy1000_version", jim_zy1000_version, NULL, NULL);
 346
 347
 348         Jim_CreateCommand(interp, "powerstatus", zylinjtag_Jim_Command_powerstatus, NULL, NULL);
 349
 350         return ERROR_OK;
 351 }
 352
 353
 354
 355
 356 int zy1000_init(void)
 357 {
 358         LOG_USER("%s", ZYLIN_OPENOCD_VERSION);
 359
 360         ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x30); // Turn on LED1 & LED2
 361
 362         setPower(true); // on by default
 363
 364
 365          /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
 366         zy1000_reset(0, 0);
 367         zy1000_speed(jtag_speed);
 368
 369         bitbang_interface = &zy1000_bitbang;
 370
 371         return ERROR_OK;
 372 }
 373
 374 int zy1000_quit(void)
 375 {
 376
 377         return ERROR_OK;
 378 }
 379
 380
 381
 382
 383 int interface_jtag_execute_queue(void)
 384 {
 385         cyg_uint32 empty;
 386
 387         waitIdle();
 388         ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, empty);
 389         /* clear JTAG error register */
 390         ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x400);
 391
 392         if ((empty&0x400)!=0)
 393         {
 394                 LOG_WARNING("RCLK timeout");
 395                 /* the error is informative only as we don't want to break the firmware if there
 396                  * is a false positive.
 397                  */
 398 //              return ERROR_FAIL;
 399         }
 400         return ERROR_OK;
 401 }
 402
 403
 404
 405
 406
 407 static cyg_uint32 getShiftValue(void)
 408 {
 409         cyg_uint32 value;
 410         waitIdle();
 411         ZY1000_PEEK(ZY1000_JTAG_BASE+0xc, value);
 412         VERBOSE(LOG_INFO("getShiftValue %08x", value));
 413         return value;
 414 }
 415 #if 0
 416 static cyg_uint32 getShiftValueFlip(void)
 417 {
 418         cyg_uint32 value;
 419         waitIdle();
 420         ZY1000_PEEK(ZY1000_JTAG_BASE+0x18, value);
 421         VERBOSE(LOG_INFO("getShiftValue %08x (flipped)", value));
 422         return value;
 423 }
 424 #endif
 425
 426 #if 0
 427 static void shiftValueInnerFlip(const tap_state_t state, const tap_state_t endState, int repeat, cyg_uint32 value)
 428 {
 429         VERBOSE(LOG_INFO("shiftValueInner %s %s %d %08x (flipped)", tap_state_name(state), tap_state_name(endState), repeat, value));
 430         cyg_uint32 a,b;
 431         a=state;
 432         b=endState;
 433         ZY1000_POKE(ZY1000_JTAG_BASE+0xc, value);
 434         ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (1<<15)|(repeat<<8)|(a<<4)|b);
 435         VERBOSE(getShiftValueFlip());
 436 }
 437 #endif
 438
 439 extern int jtag_check_value(u8 *captured, void *priv);
 440
 441 static void gotoEndState(void)
 442 {
 443         setCurrentState(cmd_queue_end_state);
 444 }
 445
 446 static __inline void scanFields(int num_fields, scan_field_t *fields, tap_state_t shiftState, tap_state_t end_state)
 447 {
 448         int i;
 449         int j;
 450         int k;
 451
 452         for (i = 0; i < num_fields; i++)
 453         {
 454                 cyg_uint32 value;
 455
 456                 static u8 *in_buff=NULL; /* pointer to buffer for scanned data */
 457                 static int in_buff_size=0;
 458                 u8 *inBuffer=NULL;
 459
 460
 461                 // figure out where to store the input data
 462                 int num_bits=fields[i].num_bits;
 463                 if (fields[i].in_value!=NULL)
 464                 {
 465                         inBuffer=fields[i].in_value;
 466                 }
 467
 468                 // here we shuffle N bits out/in
 469                 j=0;
 470                 while (j<num_bits)
 471                 {
 472                         tap_state_t pause_state;
 473                         int l;
 474                         k=num_bits-j;
 475                         pause_state=(shiftState==TAP_DRSHIFT)?TAP_DRSHIFT:TAP_IRSHIFT;
 476                         if (k>32)
 477                         {
 478                                 k=32;
 479                                 /* we have more to shift out */
 480                         } else if (i == num_fields-1)
 481                         {
 482                                 /* this was the last to shift out this time */
 483                                 pause_state=end_state;
 484                         }
 485
 486                         // we have (num_bits+7)/8 bytes of bits to toggle out.
 487                         // bits are pushed out LSB to MSB
 488                         value=0;
 489                         if (fields[i].out_value!=NULL)
 490                         {
 491                                 for (l=0; l<k; l+=8)
 492                                 {
 493                                         value|=fields[i].out_value[(j+l)/8]<<l;
 494                                 }
 495                         }
 496                         /* mask away unused bits for easier debugging */
 497                         value&=~(((u32)0xffffffff)<<k);
 498
 499                         shiftValueInner(shiftState, pause_state, k, value);
 500
 501                         if (inBuffer!=NULL)
 502                         {
 503                                 // data in, LSB to MSB
 504                                 value=getShiftValue();
 505                                 // we're shifting in data to MSB, shift data to be aligned for returning the value
 506                                 value >>= 32-k;
 507
 508                                 for (l=0; l<k; l+=8)
 509                                 {
 510                                         inBuffer[(j+l)/8]=(value>>l)&0xff;
 511                                 }
 512                         }
 513                         j+=k;
 514                 }
 515         }
 516 }
 517
 518 int interface_jtag_add_end_state(tap_state_t state)
 519 {
 520         return ERROR_OK;
 521 }
 522
 523
 524 int interface_jtag_add_ir_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 525 {
 526
 527         int j;
 528         int scan_size = 0;
 529         jtag_tap_t *tap, *nextTap;
 530         for(tap = jtag_NextEnabledTap(NULL); tap!= NULL; tap=nextTap)
 531         {
 532                 nextTap=jtag_NextEnabledTap(tap);
 533                 tap_state_t end_state;
 534                 if (nextTap==NULL)
 535                 {
 536                         end_state = cmd_queue_end_state;
 537                 } else
 538                 {
 539                         end_state = TAP_IRSHIFT;
 540                 }
 541
 542                 int found = 0;
 543
 544                 scan_size = tap->ir_length;
 545
 546                 /* search the list */
 547                 for (j=0; j < num_fields; j++)
 548                 {
 549                         if (tap == fields[j].tap)
 550                         {
 551                                 found = 1;
 552
 553                                 scanFields(1, fields+j, TAP_IRSHIFT, end_state);
 554                                 /* update device information */
 555                                 buf_cpy(fields[j].out_value, tap->cur_instr, scan_size);
 556
 557                                 tap->bypass = 0;
 558                                 break;
 559                         }
 560                 }
 561
 562                 if (!found)
 563                 {
 564                         /* if a device isn't listed, set it to BYPASS */
 565                         u8 ones[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
 566
 567                         scan_field_t tmp;
 568                         memset(&tmp, 0, sizeof(tmp));
 569                         tmp.out_value = ones;
 570                         tmp.num_bits = scan_size;
 571                         scanFields(1, &tmp, TAP_IRSHIFT, end_state);
 572                         /* update device information */
 573                         buf_cpy(tmp.out_value, tap->cur_instr, scan_size);
 574                         tap->bypass = 1;
 575                 }
 576         }
 577
 578         return ERROR_OK;
 579 }
 580
 581
 582
 583
 584
 585 int interface_jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 586 {
 587         scanFields(num_fields, fields, TAP_IRSHIFT, cmd_queue_end_state);
 588
 589         return ERROR_OK;
 590 }
 591
 592 /*extern jtag_command_t **jtag_get_last_command_p(void);*/
 593
 594 int interface_jtag_add_dr_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 595 {
 596
 597         int j;
 598         jtag_tap_t *tap, *nextTap;
 599         for(tap = jtag_NextEnabledTap(NULL); tap!= NULL; tap=nextTap)
 600         {
 601                 nextTap=jtag_NextEnabledTap(tap);
 602                 int found=0;
 603                 tap_state_t end_state;
 604                 if (nextTap==NULL)
 605                 {
 606                         end_state = cmd_queue_end_state;
 607                 } else
 608                 {
 609                         end_state = TAP_DRSHIFT;
 610                 }
 611
 612                 for (j=0; j < num_fields; j++)
 613                 {
 614                         if (tap == fields[j].tap)
 615                         {
 616                                 found = 1;
 617
 618                                 scanFields(1, fields+j, TAP_DRSHIFT, end_state);
 619                         }
 620                 }
 621                 if (!found)
 622                 {
 623                         scan_field_t tmp;
 624                         /* program the scan field to 1 bit length, and ignore it's value */
 625                         tmp.num_bits = 1;
 626                         tmp.out_value = NULL;
 627                         tmp.in_value = NULL;
 628
 629                         scanFields(1, &tmp, TAP_DRSHIFT, end_state);
 630                 }
 631                 else
 632                 {
 633                 }
 634         }
 635         return ERROR_OK;
 636 }
 637
 638 int interface_jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 639 {
 640         scanFields(num_fields, fields, TAP_DRSHIFT, cmd_queue_end_state);
 641         return ERROR_OK;
 642 }
 643
 644
 645 int interface_jtag_add_tlr()
 646 {
 647         setCurrentState(TAP_RESET);
 648         return ERROR_OK;
 649 }
 650
 651
 652
 653
 654 extern int jtag_nsrst_delay;
 655 extern int jtag_ntrst_delay;
 656
 657 int interface_jtag_add_reset(int req_trst, int req_srst)
 658 {
 659         zy1000_reset(req_trst, req_srst);
 660         return ERROR_OK;
 661 }
 662
 663 static int zy1000_jtag_add_clocks(int num_cycles, tap_state_t state, tap_state_t clockstate)
 664 {
 665         /* num_cycles can be 0 */
 666         setCurrentState(clockstate);
 667
 668         /* execute num_cycles, 32 at the time. */
 669         int i;
 670         for (i=0; i<num_cycles; i+=32)
 671         {
 672                 int num;
 673                 num=32;
 674                 if (num_cycles-i<num)
 675                 {
 676                         num=num_cycles-i;
 677                 }
 678                 shiftValueInner(clockstate, clockstate, num, 0);
 679         }
 680
 681 #if !TEST_MANUAL()
 682         /* finish in end_state */
 683         setCurrentState(state);
 684 #else
 685         tap_state_t t=TAP_IDLE;
 686         /* test manual drive code on any target */
 687         int tms;
 688         u8 tms_scan = tap_get_tms_path(t, state);
 689         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 690
 691         for (i = 0; i < tms_count; i++)
 692         {
 693                 tms = (tms_scan >> i) & 1;
 694                 waitIdle();
 695                 ZY1000_POKE(ZY1000_JTAG_BASE+0x28,  tms);
 696         }
 697         waitIdle();
 698         ZY1000_POKE(ZY1000_JTAG_BASE+0x20, state);
 699 #endif
 700
 701
 702         return ERROR_OK;
 703 }
 704
 705 int interface_jtag_add_runtest(int num_cycles, tap_state_t state)
 706 {
 707         return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE);
 708 }
 709
 710 int interface_jtag_add_clocks(int num_cycles)
 711 {
 712         return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_end_state);
 713 }
 714
 715 int interface_jtag_add_sleep(u32 us)
 716 {
 717         jtag_sleep(us);
 718         return ERROR_OK;
 719 }
 720
 721 int interface_jtag_add_pathmove(int num_states, tap_state_t *path)
 722 {
 723         int state_count;
 724         int tms = 0;
 725
 726         /*wait for the fifo to be empty*/
 727         waitIdle();
 728
 729         state_count = 0;
 730
 731         tap_state_t cur_state=cmd_queue_cur_state;
 732
 733         while (num_states)
 734         {
 735                 if (tap_state_transition(cur_state, false) == path[state_count])
 736                 {
 737                         tms = 0;
 738                 }
 739                 else if (tap_state_transition(cur_state, true) == path[state_count])
 740                 {
 741                         tms = 1;
 742                 }
 743                 else
 744                 {
 745                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(cur_state), tap_state_name(path[state_count]));
 746                         exit(-1);
 747                 }
 748
 749                 waitIdle();
 750                 ZY1000_POKE(ZY1000_JTAG_BASE+0x28,  tms);
 751
 752                 cur_state = path[state_count];
 753                 state_count++;
 754                 num_states--;
 755         }
 756
 757         waitIdle();
 758         ZY1000_POKE(ZY1000_JTAG_BASE+0x20,  cur_state);
 759         return ERROR_OK;
 760 }
 761
 762
 763
 764 void embeddedice_write_dcc(jtag_tap_t *tap, int reg_addr, u8 *buffer, int little, int count)
 765 {
 766 //      static int const reg_addr=0x5;
 767         tap_state_t end_state=cmd_queue_end_state;
 768         if (jtag_NextEnabledTap(jtag_NextEnabledTap(NULL))==NULL)
 769         {
 770                 /* better performance via code duplication */
 771                 if (little)
 772                 {
 773                         int i;
 774                         for (i = 0; i < count; i++)
 775                         {
 776                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 1));
 777                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr|(1<<5));
 778                                 buffer+=4;
 779                         }
 780                 } else
 781                 {
 782                         int i;
 783                         for (i = 0; i < count; i++)
 784                         {
 785                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 0));
 786                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr|(1<<5));
 787                                 buffer+=4;
 788                         }
 789                 }
 790         }
 791         else
 792         {
 793                 int i;
 794                 for (i = 0; i < count; i++)
 795                 {
 796                         embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 797                         buffer += 4;
 798                 }
 799         }
 800 }
 801
 802 int loadFile(const char *fileName, void **data, int *len);
 803
 804 /* boolean parameter stored on config */
 805 int boolParam(char *var)
 806 {
 807         bool result = false;
 808         char *name = alloc_printf("%s/%s", zylin_config_dir, var);
 809         if (name == NULL)
 810                 return result;
 811
 812         void *data;
 813         int len;
 814         if (loadFile(name, &data, &len) == ERROR_OK)
 815         {
 816                 if (len > 1)
 817                         len = 1;
 818                 result = strncmp((char *) data, "1", len) == 0;
 819                 free(data);
 820         }
 821         free(name);
 822         return result;
 823 }
 824
 825