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   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
  24 #include "log.h"
  25 #include "jtag.h"
  26 #include "bitbang.h"
  27 #include "../target/embeddedice.h"
  28
  29
  30 #include <cyg/hal/hal_io.h>             // low level i/o
  31 #include <cyg/hal/hal_diag.h>
  32
  33 #include <stdlib.h>
  34
  35 #define ZYLIN_VERSION "1.51"
  36 #define ZYLIN_DATE __DATE__
  37 #define ZYLIN_TIME __TIME__
  38 #define ZYLIN_OPENOCD "$Revision$"
  39 #define ZYLIN_OPENOCD_VERSION "Zylin JTAG ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE " " ZYLIN_TIME
  40 const char *zylin_config_dir="/config/settings";
  41
  42 /* low level command set
  43  */
  44 int zy1000_read(void);
  45 static void zy1000_write(int tck, int tms, int tdi);
  46 void zy1000_reset(int trst, int srst);
  47
  48
  49 int zy1000_speed(int speed);
  50 int zy1000_register_commands(struct command_context_s *cmd_ctx);
  51 int zy1000_init(void);
  52 int zy1000_quit(void);
  53
  54 /* interface commands */
  55 int zy1000_handle_zy1000_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  56
  57 static int zy1000_khz(int khz, int *jtag_speed)
  58 {
  59         if (khz==0)
  60         {
  61                 *jtag_speed=0;
  62         }
  63         else
  64         {
  65                 *jtag_speed=64000/khz;
  66         }
  67         return ERROR_OK;
  68 }
  69
  70 static int zy1000_speed_div(int speed, int *khz)
  71 {
  72         if (speed==0)
  73         {
  74                 *khz = 0;
  75         }
  76         else
  77         {
  78                 *khz=64000/speed;
  79         }
  80
  81         return ERROR_OK;
  82 }
  83
  84 static bool readPowerDropout(void)
  85 {
  86         cyg_uint32 state;
  87         // sample and clear power dropout
  88         HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x80);
  89         HAL_READ_UINT32(ZY1000_JTAG_BASE+0x10, state);
  90         bool powerDropout;
  91         powerDropout = (state & 0x80) != 0;
  92         return powerDropout;
  93 }
  94
  95
  96 static bool readSRST(void)
  97 {
  98         cyg_uint32 state;
  99         // sample and clear SRST sensing
 100         HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x00000040);
 101         HAL_READ_UINT32(ZY1000_JTAG_BASE+0x10, state);
 102         bool srstAsserted;
 103         srstAsserted = (state & 0x40) != 0;
 104         return srstAsserted;
 105 }
 106
 107 static int zy1000_srst_asserted(int *srst_asserted)
 108 {
 109         *srst_asserted=readSRST();
 110         return ERROR_OK;
 111 }
 112
 113 static int zy1000_power_dropout(int *dropout)
 114 {
 115         *dropout=readPowerDropout();
 116         return ERROR_OK;
 117 }
 118
 119
 120 jtag_interface_t zy1000_interface =
 121 {
 122         .name = "ZY1000",
 123         .execute_queue = bitbang_execute_queue,
 124         .speed = zy1000_speed,
 125         .register_commands = zy1000_register_commands,
 126         .init = zy1000_init,
 127         .quit = zy1000_quit,
 128         .khz = zy1000_khz,
 129         .speed_div = zy1000_speed_div,
 130         .power_dropout = zy1000_power_dropout,
 131         .srst_asserted = zy1000_srst_asserted,
 132 };
 133
 134 bitbang_interface_t zy1000_bitbang =
 135 {
 136         .read = zy1000_read,
 137         .write = zy1000_write,
 138         .reset = zy1000_reset
 139 };
 140
 141
 142
 143 static void zy1000_write(int tck, int tms, int tdi)
 144 {
 145
 146 }
 147
 148 int zy1000_read(void)
 149 {
 150         return -1;
 151 }
 152
 153 extern bool readSRST(void);
 154
 155 void zy1000_reset(int trst, int srst)
 156 {
 157         LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst);
 158         if(!srst)
 159         {
 160                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x00000001);
 161         }
 162         else
 163         {
 164                 /* Danger!!! if clk!=0 when in
 165                  * idle in TAP_IDLE, reset halt on str912 will fail.
 166                  */
 167                 ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x00000001);
 168         }
 169
 170         if(!trst)
 171         {
 172                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x00000002);
 173         }
 174         else
 175         {
 176                 /* assert reset */
 177                 ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x00000002);
 178         }
 179
 180         if (trst||(srst&&(jtag_reset_config & RESET_SRST_PULLS_TRST)))
 181         {
 182                 waitIdle();
 183                 /* we're now in the RESET state until trst is deasserted */
 184                 ZY1000_POKE(ZY1000_JTAG_BASE+0x20, TAP_RESET);
 185         } else
 186         {
 187                 /* We'll get RCLK failure when we assert TRST, so clear any false positives here */
 188                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x400);
 189         }
 190
 191         /* wait for srst to float back up */
 192         if (!srst)
 193         {
 194                 int i;
 195                 for (i=0; i<1000; i++)
 196                 {
 197                         // We don't want to sense our own reset, so we clear here.
 198                         // There is of course a timing hole where we could loose
 199                         // a "real" reset.
 200                         if (!readSRST())
 201                                 break;
 202
 203                         /* wait 1ms */
 204                         alive_sleep(1);
 205                 }
 206
 207                 if (i==1000)
 208                 {
 209                         LOG_USER("SRST didn't deassert after %dms", i);
 210                 } else if (i>1)
 211                 {
 212                         LOG_USER("SRST took %dms to deassert", i);
 213                 }
 214         }
 215 }
 216
 217 int zy1000_speed(int speed)
 218 {
 219         if(speed == 0)
 220         {
 221                 /*0 means RCLK*/
 222                 speed = 0;
 223                 ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x100);
 224                 LOG_DEBUG("jtag_speed using RCLK");
 225         }
 226         else
 227         {
 228                 if(speed > 8190 || speed < 2)
 229                 {
 230                         LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz");
 231                         return ERROR_INVALID_ARGUMENTS;
 232                 }
 233
 234                 LOG_USER("jtag_speed %d => JTAG clk=%f", speed, 64.0/(float)speed);
 235                 ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x100);
 236                 ZY1000_POKE(ZY1000_JTAG_BASE+0x1c, speed&~1);
 237         }
 238         return ERROR_OK;
 239 }
 240
 241 static bool savePower;
 242
 243
 244 static void setPower(bool power)
 245 {
 246         savePower = power;
 247         if (power)
 248         {
 249                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x14, 0x8);
 250         } else
 251         {
 252                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE+0x10, 0x8);
 253         }
 254 }
 255
 256 int handle_power_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 257 {
 258         if (argc > 1)
 259         {
 260                 return ERROR_INVALID_ARGUMENTS;
 261         }
 262
 263         if (argc == 1)
 264         {
 265                 if (strcmp(args[0], "on") == 0)
 266                 {
 267                         setPower(1);
 268                 }
 269                 else if (strcmp(args[0], "off") == 0)
 270                 {
 271                         setPower(0);
 272                 } else
 273                 {
 274                         command_print(cmd_ctx, "arg is \"on\" or \"off\"");
 275                         return ERROR_INVALID_ARGUMENTS;
 276                 }
 277         }
 278
 279         command_print(cmd_ctx, "Target power %s", savePower ? "on" : "off");
 280
 281         return ERROR_OK;
 282 }
 283
 284
 285 /* Give TELNET a way to find out what version this is */
 286 static int jim_zy1000_version(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 287 {
 288         if ((argc < 1) || (argc > 2))
 289                 return JIM_ERR;
 290         char buff[128];
 291         const char *version_str=NULL;
 292
 293         if (argc == 1)
 294         {
 295                 version_str=ZYLIN_OPENOCD_VERSION;
 296         } else
 297         {
 298                 const char *str = Jim_GetString(argv[1], NULL);
 299                 if (strcmp("openocd", str) == 0)
 300                 {
 301                         int revision;
 302                         revision = atol(ZYLIN_OPENOCD+strlen("XRevision: "));
 303                         sprintf(buff, "%d", revision);
 304                         version_str=buff;
 305                 }
 306                 else if (strcmp("zy1000", str) == 0)
 307                 {
 308                         version_str=ZYLIN_VERSION;
 309                 }
 310                 else if (strcmp("date", str) == 0)
 311                 {
 312                         version_str=ZYLIN_DATE;
 313                 }
 314                 else
 315                 {
 316                         return JIM_ERR;
 317                 }
 318         }
 319
 320         Jim_SetResult(interp, Jim_NewStringObj(interp, version_str, -1));
 321
 322         return JIM_OK;
 323 }
 324
 325
 326 static int
 327 zylinjtag_Jim_Command_powerstatus(Jim_Interp *interp,
 328                                                                    int argc,
 329                 Jim_Obj * const *argv)
 330 {
 331         if (argc != 1)
 332         {
 333                 Jim_WrongNumArgs(interp, 1, argv, "powerstatus");
 334                 return JIM_ERR;
 335         }
 336
 337         cyg_uint32 status;
 338         ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, status);
 339
 340         Jim_SetResult(interp, Jim_NewIntObj(interp, (status&0x80)!=0));
 341
 342         return JIM_OK;
 343 }
 344
 345 int zy1000_register_commands(struct command_context_s *cmd_ctx)
 346 {
 347         register_command(cmd_ctx, NULL, "power", handle_power_command, COMMAND_ANY,
 348                         "power <on/off> - turn power switch to target on/off. No arguments - print status.");
 349
 350         Jim_CreateCommand(interp, "zy1000_version", jim_zy1000_version, NULL, NULL);
 351
 352
 353         Jim_CreateCommand(interp, "powerstatus", zylinjtag_Jim_Command_powerstatus, NULL, NULL);
 354
 355         return ERROR_OK;
 356 }
 357
 358
 359
 360
 361 int zy1000_init(void)
 362 {
 363         LOG_USER("%s", ZYLIN_OPENOCD_VERSION);
 364
 365         ZY1000_POKE(ZY1000_JTAG_BASE+0x10, 0x30); // Turn on LED1 & LED2
 366
 367         setPower(true); // on by default
 368
 369
 370          /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
 371         zy1000_reset(0, 0);
 372         zy1000_speed(jtag_speed);
 373
 374         bitbang_interface = &zy1000_bitbang;
 375
 376         return ERROR_OK;
 377 }
 378
 379 int zy1000_quit(void)
 380 {
 381
 382         return ERROR_OK;
 383 }
 384
 385
 386
 387
 388 int interface_jtag_execute_queue(void)
 389 {
 390         cyg_uint32 empty;
 391
 392         waitIdle();
 393         ZY1000_PEEK(ZY1000_JTAG_BASE+0x10, empty);
 394         /* clear JTAG error register */
 395         ZY1000_POKE(ZY1000_JTAG_BASE+0x14, 0x400);
 396
 397         if ((empty&0x400)!=0)
 398         {
 399                 LOG_WARNING("RCLK timeout");
 400                 /* the error is informative only as we don't want to break the firmware if there
 401                  * is a false positive.
 402                  */
 403 //              return ERROR_FAIL;
 404         }
 405         return ERROR_OK;
 406 }
 407
 408
 409
 410
 411
 412 static cyg_uint32 getShiftValue(void)
 413 {
 414         cyg_uint32 value;
 415         waitIdle();
 416         ZY1000_PEEK(ZY1000_JTAG_BASE+0xc, value);
 417         VERBOSE(LOG_INFO("getShiftValue %08x", value));
 418         return value;
 419 }
 420 #if 0
 421 static cyg_uint32 getShiftValueFlip(void)
 422 {
 423         cyg_uint32 value;
 424         waitIdle();
 425         ZY1000_PEEK(ZY1000_JTAG_BASE+0x18, value);
 426         VERBOSE(LOG_INFO("getShiftValue %08x (flipped)", value));
 427         return value;
 428 }
 429 #endif
 430
 431 #if 0
 432 static void shiftValueInnerFlip(const tap_state_t state, const tap_state_t endState, int repeat, cyg_uint32 value)
 433 {
 434         VERBOSE(LOG_INFO("shiftValueInner %s %s %d %08x (flipped)", tap_state_name(state), tap_state_name(endState), repeat, value));
 435         cyg_uint32 a,b;
 436         a=state;
 437         b=endState;
 438         ZY1000_POKE(ZY1000_JTAG_BASE+0xc, value);
 439         ZY1000_POKE(ZY1000_JTAG_BASE+0x8, (1<<15)|(repeat<<8)|(a<<4)|b);
 440         VERBOSE(getShiftValueFlip());
 441 }
 442 #endif
 443
 444 extern int jtag_check_value(u8 *captured, void *priv);
 445
 446 static void gotoEndState(void)
 447 {
 448         setCurrentState(cmd_queue_end_state);
 449 }
 450
 451 static __inline void scanFields(int num_fields, scan_field_t *fields, tap_state_t shiftState, int pause)
 452 {
 453         int i;
 454         int j;
 455         int k;
 456
 457         for (i = 0; i < num_fields; i++)
 458         {
 459                 cyg_uint32 value;
 460
 461                 static u8 *in_buff=NULL; /* pointer to buffer for scanned data */
 462                 static int in_buff_size=0;
 463                 u8 *inBuffer=NULL;
 464
 465
 466                 // figure out where to store the input data
 467                 int num_bits=fields[i].num_bits;
 468                 if (fields[i].in_value!=NULL)
 469                 {
 470                         inBuffer=fields[i].in_value;
 471                 }
 472
 473                 // here we shuffle N bits out/in
 474                 j=0;
 475                 while (j<num_bits)
 476                 {
 477                         tap_state_t pause_state;
 478                         int l;
 479                         k=num_bits-j;
 480                         pause_state=(shiftState==TAP_DRSHIFT)?TAP_DRSHIFT:TAP_IRSHIFT;
 481                         if (k>32)
 482                         {
 483                                 k=32;
 484                                 /* we have more to shift out */
 485                         } else if (pause&&(i == num_fields-1))
 486                         {
 487                                 /* this was the last to shift out this time */
 488                                 pause_state=(shiftState==TAP_DRSHIFT)?TAP_DRPAUSE:TAP_IRPAUSE;
 489                         }
 490
 491                         // we have (num_bits+7)/8 bytes of bits to toggle out.
 492                         // bits are pushed out LSB to MSB
 493                         value=0;
 494                         if (fields[i].out_value!=NULL)
 495                         {
 496                                 for (l=0; l<k; l+=8)
 497                                 {
 498                                         value|=fields[i].out_value[(j+l)/8]<<l;
 499                                 }
 500                         }
 501                         /* mask away unused bits for easier debugging */
 502                         value&=~(((u32)0xffffffff)<<k);
 503
 504                         shiftValueInner(shiftState, pause_state, k, value);
 505
 506                         if (inBuffer!=NULL)
 507                         {
 508                                 // data in, LSB to MSB
 509                                 value=getShiftValue();
 510                                 // we're shifting in data to MSB, shift data to be aligned for returning the value
 511                                 value >>= 32-k;
 512
 513                                 for (l=0; l<k; l+=8)
 514                                 {
 515                                         inBuffer[(j+l)/8]=(value>>l)&0xff;
 516                                 }
 517                         }
 518                         j+=k;
 519                 }
 520         }
 521 }
 522
 523 int interface_jtag_add_end_state(tap_state_t state)
 524 {
 525         return ERROR_OK;
 526 }
 527
 528
 529 int interface_jtag_add_ir_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 530 {
 531
 532         int j;
 533         int scan_size = 0;
 534         jtag_tap_t *tap, *nextTap;
 535         for(tap = jtag_NextEnabledTap(NULL); tap!= NULL; tap=nextTap)
 536         {
 537                 nextTap=jtag_NextEnabledTap(tap);
 538                 int pause=(nextTap==NULL);
 539
 540                 int found = 0;
 541
 542                 scan_size = tap->ir_length;
 543
 544                 /* search the list */
 545                 for (j=0; j < num_fields; j++)
 546                 {
 547                         if (tap == fields[j].tap)
 548                         {
 549                                 found = 1;
 550
 551                                 scanFields(1, fields+j, TAP_IRSHIFT, pause);
 552                                 /* update device information */
 553                                 buf_cpy(fields[j].out_value, tap->cur_instr, scan_size);
 554
 555                                 tap->bypass = 0;
 556                                 break;
 557                         }
 558                 }
 559
 560                 if (!found)
 561                 {
 562                         /* if a device isn't listed, set it to BYPASS */
 563                         u8 ones[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
 564
 565                         scan_field_t tmp;
 566                         memset(&tmp, 0, sizeof(tmp));
 567                         tmp.out_value = ones;
 568                         tmp.num_bits = scan_size;
 569                         scanFields(1, &tmp, TAP_IRSHIFT, pause);
 570                         /* update device information */
 571                         buf_cpy(tmp.out_value, tap->cur_instr, scan_size);
 572                         tap->bypass = 1;
 573                 }
 574         }
 575         gotoEndState();
 576
 577         return ERROR_OK;
 578 }
 579
 580
 581
 582
 583
 584 int interface_jtag_add_plain_ir_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 585 {
 586         scanFields(num_fields, fields, TAP_IRSHIFT, 1);
 587         gotoEndState();
 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                 int pause=(nextTap==NULL);
 604
 605                 for (j=0; j < num_fields; j++)
 606                 {
 607                         if (tap == fields[j].tap)
 608                         {
 609                                 found = 1;
 610
 611                                 scanFields(1, fields+j, TAP_DRSHIFT, pause);
 612                         }
 613                 }
 614                 if (!found)
 615                 {
 616                         scan_field_t tmp;
 617                         /* program the scan field to 1 bit length, and ignore it's value */
 618                         tmp.num_bits = 1;
 619                         tmp.out_value = NULL;
 620                         tmp.in_value = NULL;
 621
 622                         scanFields(1, &tmp, TAP_DRSHIFT, pause);
 623                 }
 624                 else
 625                 {
 626                 }
 627         }
 628         gotoEndState();
 629         return ERROR_OK;
 630 }
 631
 632 int interface_jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 633 {
 634         scanFields(num_fields, fields, TAP_DRSHIFT, 1);
 635         gotoEndState();
 636         return ERROR_OK;
 637 }
 638
 639
 640 int interface_jtag_add_tlr()
 641 {
 642         setCurrentState(TAP_RESET);
 643         return ERROR_OK;
 644 }
 645
 646
 647
 648
 649 extern int jtag_nsrst_delay;
 650 extern int jtag_ntrst_delay;
 651
 652 int interface_jtag_add_reset(int req_trst, int req_srst)
 653 {
 654         zy1000_reset(req_trst, req_srst);
 655         return ERROR_OK;
 656 }
 657
 658 static int zy1000_jtag_add_clocks(int num_cycles, tap_state_t state, tap_state_t clockstate)
 659 {
 660         /* num_cycles can be 0 */
 661         setCurrentState(clockstate);
 662
 663         /* execute num_cycles, 32 at the time. */
 664         int i;
 665         for (i=0; i<num_cycles; i+=32)
 666         {
 667                 int num;
 668                 num=32;
 669                 if (num_cycles-i<num)
 670                 {
 671                         num=num_cycles-i;
 672                 }
 673                 shiftValueInner(clockstate, clockstate, num, 0);
 674         }
 675
 676 #if !TEST_MANUAL()
 677         /* finish in end_state */
 678         setCurrentState(state);
 679 #else
 680         tap_state_t t=TAP_IDLE;
 681         /* test manual drive code on any target */
 682         int tms;
 683         u8 tms_scan = tap_get_tms_path(t, state);
 684
 685         for (i = 0; i < 7; i++)
 686         {
 687                 tms = (tms_scan >> i) & 1;
 688                 waitIdle();
 689                 ZY1000_POKE(ZY1000_JTAG_BASE+0x28,  tms);
 690         }
 691         waitIdle();
 692         ZY1000_POKE(ZY1000_JTAG_BASE+0x20, state);
 693 #endif
 694
 695
 696         return ERROR_OK;
 697 }
 698
 699 int interface_jtag_add_runtest(int num_cycles, tap_state_t state)
 700 {
 701         return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE);
 702 }
 703
 704 int interface_jtag_add_clocks(int num_cycles)
 705 {
 706         return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_end_state);
 707 }
 708
 709 int interface_jtag_add_sleep(u32 us)
 710 {
 711         jtag_sleep(us);
 712         return ERROR_OK;
 713 }
 714
 715 int interface_jtag_add_pathmove(int num_states, tap_state_t *path)
 716 {
 717         int state_count;
 718         int tms = 0;
 719
 720         /*wait for the fifo to be empty*/
 721         waitIdle();
 722
 723         state_count = 0;
 724
 725         tap_state_t cur_state=cmd_queue_cur_state;
 726
 727         while (num_states)
 728         {
 729                 if (tap_state_transition(cur_state, false) == path[state_count])
 730                 {
 731                         tms = 0;
 732                 }
 733                 else if (tap_state_transition(cur_state, true) == path[state_count])
 734                 {
 735                         tms = 1;
 736                 }
 737                 else
 738                 {
 739                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(cur_state), tap_state_name(path[state_count]));
 740                         exit(-1);
 741                 }
 742
 743                 waitIdle();
 744                 ZY1000_POKE(ZY1000_JTAG_BASE+0x28,  tms);
 745
 746                 cur_state = path[state_count];
 747                 state_count++;
 748                 num_states--;
 749         }
 750
 751         waitIdle();
 752         ZY1000_POKE(ZY1000_JTAG_BASE+0x20,  cur_state);
 753         return ERROR_OK;
 754 }
 755
 756
 757
 758 void embeddedice_write_dcc(jtag_tap_t *tap, int reg_addr, u8 *buffer, int little, int count)
 759 {
 760 //      static int const reg_addr=0x5;
 761         tap_state_t end_state=cmd_queue_end_state;
 762         if (jtag_NextEnabledTap(jtag_NextEnabledTap(NULL))==NULL)
 763         {
 764                 /* better performance via code duplication */
 765                 if (little)
 766                 {
 767                         int i;
 768                         for (i = 0; i < count; i++)
 769                         {
 770                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 1));
 771                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr|(1<<5));
 772                                 buffer+=4;
 773                         }
 774                 } else
 775                 {
 776                         int i;
 777                         for (i = 0; i < count; i++)
 778                         {
 779                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 0));
 780                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr|(1<<5));
 781                                 buffer+=4;
 782                         }
 783                 }
 784         }
 785         else
 786         {
 787                 int i;
 788                 for (i = 0; i < count; i++)
 789                 {
 790                         embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 791                         buffer += 4;
 792                 }
 793         }
 794 }
 795
 796 int loadFile(const char *fileName, void **data, int *len);
 797
 798 /* boolean parameter stored on config */
 799 int boolParam(char *var)
 800 {
 801         bool result = false;
 802         char *name = alloc_printf("%s/%s", zylin_config_dir, var);
 803         if (name == NULL)
 804                 return result;
 805
 806         void *data;
 807         int len;
 808         if (loadFile(name, &data, &len) == ERROR_OK)
 809         {
 810                 if (len > 1)
 811                         len = 1;
 812                 result = strncmp((char *) data, "1", len) == 0;
 813                 free(data);
 814         }
 815         free(name);
 816         return result;
 817 }
 818
 819