git.sur5r.net Git - openocd/blob - src/jtag/zy1000/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 "minidriver.h"
  25 #include "interface.h"
  26 #include "zy1000_version.h"
  27
  28 #include <cyg/hal/hal_io.h>             // low level i/o
  29 #include <cyg/hal/hal_diag.h>
  30
  31 #include <time.h>
  32
  33 #define ZYLIN_VERSION GIT_ZY1000_VERSION
  34 #define ZYLIN_DATE __DATE__
  35 #define ZYLIN_TIME __TIME__
  36 #define ZYLIN_OPENOCD GIT_OPENOCD_VERSION
  37 #define ZYLIN_OPENOCD_VERSION "ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE
  38
  39 /* low level command set
  40  */
  41 void zy1000_reset(int trst, int srst);
  42
  43
  44 int zy1000_speed(int speed);
  45 int zy1000_register_commands(struct command_context *cmd_ctx);
  46 int zy1000_init(void);
  47 int zy1000_quit(void);
  48
  49 static int zy1000_khz(int khz, int *jtag_speed)
  50 {
  51         if (khz == 0)
  52         {
  53                 *jtag_speed = 0;
  54         }
  55         else
  56         {
  57                 *jtag_speed = 64000/khz;
  58         }
  59         return ERROR_OK;
  60 }
  61
  62 static int zy1000_speed_div(int speed, int *khz)
  63 {
  64         if (speed == 0)
  65         {
  66                 *khz = 0;
  67         }
  68         else
  69         {
  70                 *khz = 64000/speed;
  71         }
  72
  73         return ERROR_OK;
  74 }
  75
  76 static bool readPowerDropout(void)
  77 {
  78         cyg_uint32 state;
  79         // sample and clear power dropout
  80         HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x10, 0x80);
  81         HAL_READ_UINT32(ZY1000_JTAG_BASE + 0x10, state);
  82         bool powerDropout;
  83         powerDropout = (state & 0x80) != 0;
  84         return powerDropout;
  85 }
  86
  87
  88 static bool readSRST(void)
  89 {
  90         cyg_uint32 state;
  91         // sample and clear SRST sensing
  92         HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x10, 0x00000040);
  93         HAL_READ_UINT32(ZY1000_JTAG_BASE + 0x10, state);
  94         bool srstAsserted;
  95         srstAsserted = (state & 0x40) != 0;
  96         return srstAsserted;
  97 }
  98
  99 static int zy1000_srst_asserted(int *srst_asserted)
 100 {
 101         *srst_asserted = readSRST();
 102         return ERROR_OK;
 103 }
 104
 105 static int zy1000_power_dropout(int *dropout)
 106 {
 107         *dropout = readPowerDropout();
 108         return ERROR_OK;
 109 }
 110
 111
 112 struct jtag_interface zy1000_interface =
 113 {
 114         .name = "ZY1000",
 115         .execute_queue = NULL,
 116         .speed = zy1000_speed,
 117         .register_commands = zy1000_register_commands,
 118         .init = zy1000_init,
 119         .quit = zy1000_quit,
 120         .khz = zy1000_khz,
 121         .speed_div = zy1000_speed_div,
 122         .power_dropout = zy1000_power_dropout,
 123         .srst_asserted = zy1000_srst_asserted,
 124 };
 125
 126 void zy1000_reset(int trst, int srst)
 127 {
 128         LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst);
 129         if (!srst)
 130         {
 131                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000001);
 132         }
 133         else
 134         {
 135                 /* Danger!!! if clk != 0 when in
 136                  * idle in TAP_IDLE, reset halt on str912 will fail.
 137                  */
 138                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000001);
 139         }
 140
 141         if (!trst)
 142         {
 143                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000002);
 144         }
 145         else
 146         {
 147                 /* assert reset */
 148                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000002);
 149         }
 150
 151         if (trst||(srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
 152         {
 153                 waitIdle();
 154                 /* we're now in the RESET state until trst is deasserted */
 155                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_RESET);
 156         } else
 157         {
 158                 /* We'll get RCLK failure when we assert TRST, so clear any false positives here */
 159                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x400);
 160         }
 161
 162         /* wait for srst to float back up */
 163         if (!srst)
 164         {
 165                 int i;
 166                 for (i = 0; i < 1000; i++)
 167                 {
 168                         // We don't want to sense our own reset, so we clear here.
 169                         // There is of course a timing hole where we could loose
 170                         // a "real" reset.
 171                         if (!readSRST())
 172                                 break;
 173
 174                         /* wait 1ms */
 175                         alive_sleep(1);
 176                 }
 177
 178                 if (i == 1000)
 179                 {
 180                         LOG_USER("SRST didn't deassert after %dms", i);
 181                 } else if (i > 1)
 182                 {
 183                         LOG_USER("SRST took %dms to deassert", i);
 184                 }
 185         }
 186 }
 187
 188 int zy1000_speed(int speed)
 189 {
 190         if (speed == 0)
 191         {
 192                 /*0 means RCLK*/
 193                 speed = 0;
 194                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x100);
 195                 LOG_DEBUG("jtag_speed using RCLK");
 196         }
 197         else
 198         {
 199                 if (speed > 8190 || speed < 2)
 200                 {
 201                         LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz");
 202                         return ERROR_INVALID_ARGUMENTS;
 203                 }
 204
 205                 LOG_USER("jtag_speed %d => JTAG clk=%f", speed, 64.0/(float)speed);
 206                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x100);
 207                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x1c, speed&~1);
 208         }
 209         return ERROR_OK;
 210 }
 211
 212 static bool savePower;
 213
 214
 215 static void setPower(bool power)
 216 {
 217         savePower = power;
 218         if (power)
 219         {
 220                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x14, 0x8);
 221         } else
 222         {
 223                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x10, 0x8);
 224         }
 225 }
 226
 227 COMMAND_HANDLER(handle_power_command)
 228 {
 229         switch (CMD_ARGC)
 230         {
 231         case 1: {
 232                 bool enable;
 233                 COMMAND_PARSE_ON_OFF(CMD_ARGV[0], enable);
 234                 setPower(enable);
 235                 // fall through
 236         }
 237         case 0:
 238                 LOG_INFO("Target power %s", savePower ? "on" : "off");
 239                 break;
 240         default:
 241                 return ERROR_INVALID_ARGUMENTS;
 242         }
 243
 244         return ERROR_OK;
 245 }
 246
 247
 248 /* Give TELNET a way to find out what version this is */
 249 static int jim_zy1000_version(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 250 {
 251         if ((argc < 1) || (argc > 3))
 252                 return JIM_ERR;
 253         const char *version_str = NULL;
 254
 255         if (argc == 1)
 256         {
 257                 version_str = ZYLIN_OPENOCD_VERSION;
 258         } else
 259         {
 260                 const char *str = Jim_GetString(argv[1], NULL);
 261                 const char *str2 = NULL;
 262                 if (argc > 2)
 263                         str2 = Jim_GetString(argv[2], NULL);
 264                 if (strcmp("openocd", str) == 0)
 265                 {
 266                         version_str = ZYLIN_OPENOCD;
 267                 }
 268                 else if (strcmp("zy1000", str) == 0)
 269                 {
 270                         version_str = ZYLIN_VERSION;
 271                 }
 272                 else if (strcmp("date", str) == 0)
 273                 {
 274                         version_str = ZYLIN_DATE;
 275                 }
 276                 else if (strcmp("time", str) == 0)
 277                 {
 278                         version_str = ZYLIN_TIME;
 279                 }
 280                 else if (strcmp("pcb", str) == 0)
 281                 {
 282 #ifdef CYGPKG_HAL_NIOS2
 283                         version_str="c";
 284 #else
 285                         version_str="b";
 286 #endif
 287                 }
 288 #ifdef CYGPKG_HAL_NIOS2
 289                 else if (strcmp("fpga", str) == 0)
 290                 {
 291
 292                         /* return a list of 32 bit integers to describe the expected
 293                          * and actual FPGA
 294                          */
 295                         static char *fpga_id = "0x12345678 0x12345678 0x12345678 0x12345678";
 296                         cyg_uint32 id, timestamp;
 297                         HAL_READ_UINT32(SYSID_BASE, id);
 298                         HAL_READ_UINT32(SYSID_BASE+4, timestamp);
 299                         sprintf(fpga_id, "0x%08x 0x%08x 0x%08x 0x%08x", id, timestamp, SYSID_ID, SYSID_TIMESTAMP);
 300                         version_str = fpga_id;
 301                         if ((argc>2) && (strcmp("time", str2) == 0))
 302                         {
 303                             time_t last_mod = timestamp;
 304                             char * t = ctime (&last_mod) ;
 305                             t[strlen(t)-1] = 0;
 306                             version_str = t;
 307                         }
 308                 }
 309 #endif
 310
 311                 else
 312                 {
 313                         return JIM_ERR;
 314                 }
 315         }
 316
 317         Jim_SetResult(interp, Jim_NewStringObj(interp, version_str, -1));
 318
 319         return JIM_OK;
 320 }
 321
 322
 323 #ifdef CYGPKG_HAL_NIOS2
 324 static int jim_zy1000_writefirmware(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 325 {
 326         if (argc != 2)
 327                 return JIM_ERR;
 328
 329         int length;
 330         int stat;
 331         const char *str = Jim_GetString(argv[1], &length);
 332
 333         /* BUG!!!! skip header! */
 334         void *firmware_address=0x4000000;
 335         int firmware_length=0x100000;
 336
 337         if (length>firmware_length)
 338                 return JIM_ERR;
 339
 340         void *err_addr;
 341
 342     if ((stat = flash_erase((void *)firmware_address, firmware_length, (void **)&err_addr)) != 0)
 343     {
 344         return JIM_ERR;
 345     }
 346
 347     if ((stat = flash_program(firmware_address, str, length, (void **)&err_addr)) != 0)
 348         return JIM_ERR;
 349
 350     return JIM_OK;
 351 }
 352 #endif
 353
 354 static int
 355 zylinjtag_Jim_Command_powerstatus(Jim_Interp *interp,
 356                                                                    int argc,
 357                 Jim_Obj * const *argv)
 358 {
 359         if (argc != 1)
 360         {
 361                 Jim_WrongNumArgs(interp, 1, argv, "powerstatus");
 362                 return JIM_ERR;
 363         }
 364
 365         cyg_uint32 status;
 366         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, status);
 367
 368         Jim_SetResult(interp, Jim_NewIntObj(interp, (status&0x80) != 0));
 369
 370         return JIM_OK;
 371 }
 372
 373 int zy1000_register_commands(struct command_context *cmd_ctx)
 374 {
 375         COMMAND_REGISTER(cmd_ctx, NULL, "power", handle_power_command, COMMAND_ANY,
 376                         "power <on/off> - turn power switch to target on/off. No arguments - print status.");
 377
 378         Jim_CreateCommand(interp, "zy1000_version", jim_zy1000_version, NULL, NULL);
 379
 380
 381         Jim_CreateCommand(interp, "powerstatus", zylinjtag_Jim_Command_powerstatus, NULL, NULL);
 382
 383 #ifdef CYGPKG_HAL_NIOS2
 384         Jim_CreateCommand(interp, "updatezy1000firmware", jim_zy1000_writefirmware, NULL, NULL);
 385 #endif
 386
 387
 388         return ERROR_OK;
 389 }
 390
 391
 392
 393
 394 int zy1000_init(void)
 395 {
 396         LOG_USER("%s", ZYLIN_OPENOCD_VERSION);
 397
 398         ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x30); // Turn on LED1 & LED2
 399
 400         setPower(true); // on by default
 401
 402
 403          /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
 404         zy1000_reset(0, 0);
 405         zy1000_speed(jtag_get_speed());
 406
 407         return ERROR_OK;
 408 }
 409
 410 int zy1000_quit(void)
 411 {
 412
 413         return ERROR_OK;
 414 }
 415
 416
 417
 418 int interface_jtag_execute_queue(void)
 419 {
 420         cyg_uint32 empty;
 421
 422         waitIdle();
 423         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
 424         /* clear JTAG error register */
 425         ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x400);
 426
 427         if ((empty&0x400) != 0)
 428         {
 429                 LOG_WARNING("RCLK timeout");
 430                 /* the error is informative only as we don't want to break the firmware if there
 431                  * is a false positive.
 432                  */
 433 //              return ERROR_FAIL;
 434         }
 435         return ERROR_OK;
 436 }
 437
 438
 439
 440
 441
 442 static cyg_uint32 getShiftValue(void)
 443 {
 444         cyg_uint32 value;
 445         waitIdle();
 446         ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, value);
 447         VERBOSE(LOG_INFO("getShiftValue %08x", value));
 448         return value;
 449 }
 450 #if 0
 451 static cyg_uint32 getShiftValueFlip(void)
 452 {
 453         cyg_uint32 value;
 454         waitIdle();
 455         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x18, value);
 456         VERBOSE(LOG_INFO("getShiftValue %08x (flipped)", value));
 457         return value;
 458 }
 459 #endif
 460
 461 #if 0
 462 static void shiftValueInnerFlip(const tap_state_t state, const tap_state_t endState, int repeat, cyg_uint32 value)
 463 {
 464         VERBOSE(LOG_INFO("shiftValueInner %s %s %d %08x (flipped)", tap_state_name(state), tap_state_name(endState), repeat, value));
 465         cyg_uint32 a,b;
 466         a = state;
 467         b = endState;
 468         ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value);
 469         ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 15) | (repeat << 8) | (a << 4) | b);
 470         VERBOSE(getShiftValueFlip());
 471 }
 472 #endif
 473
 474 static void gotoEndState(tap_state_t end_state)
 475 {
 476         setCurrentState(end_state);
 477 }
 478
 479 static __inline void scanFields(int num_fields, const struct scan_field *fields, tap_state_t shiftState, int pause)
 480 {
 481         int i;
 482         int j;
 483         int k;
 484
 485         for (i = 0; i < num_fields; i++)
 486         {
 487                 cyg_uint32 value;
 488
 489                 uint8_t *inBuffer = NULL;
 490
 491
 492                 // figure out where to store the input data
 493                 int num_bits = fields[i].num_bits;
 494                 if (fields[i].in_value != NULL)
 495                 {
 496                         inBuffer = fields[i].in_value;
 497                 }
 498
 499                 // here we shuffle N bits out/in
 500                 j = 0;
 501                 while (j < num_bits)
 502                 {
 503                         tap_state_t pause_state;
 504                         int l;
 505                         k = num_bits-j;
 506                         pause_state = (shiftState == TAP_DRSHIFT)?TAP_DRSHIFT:TAP_IRSHIFT;
 507                         if (k > 32)
 508                         {
 509                                 k = 32;
 510                                 /* we have more to shift out */
 511                         } else if (pause&&(i == num_fields-1))
 512                         {
 513                                 /* this was the last to shift out this time */
 514                                 pause_state = (shiftState==TAP_DRSHIFT)?TAP_DRPAUSE:TAP_IRPAUSE;
 515                         }
 516
 517                         // we have (num_bits + 7)/8 bytes of bits to toggle out.
 518                         // bits are pushed out LSB to MSB
 519                         value = 0;
 520                         if (fields[i].out_value != NULL)
 521                         {
 522                                 for (l = 0; l < k; l += 8)
 523                                 {
 524                                         value|=fields[i].out_value[(j + l)/8]<<l;
 525                                 }
 526                         }
 527                         /* mask away unused bits for easier debugging */
 528                         if (k < 32)
 529                         {
 530                                 value&=~(((uint32_t)0xffffffff) << k);
 531                         } else
 532                         {
 533                                 /* Shifting by >= 32 is not defined by the C standard
 534                                  * and will in fact shift by &0x1f bits on nios */
 535                         }
 536
 537                         shiftValueInner(shiftState, pause_state, k, value);
 538
 539                         if (inBuffer != NULL)
 540                         {
 541                                 // data in, LSB to MSB
 542                                 value = getShiftValue();
 543                                 // we're shifting in data to MSB, shift data to be aligned for returning the value
 544                                 value >>= 32-k;
 545
 546                                 for (l = 0; l < k; l += 8)
 547                                 {
 548                                         inBuffer[(j + l)/8]=(value >> l)&0xff;
 549                                 }
 550                         }
 551                         j += k;
 552                 }
 553         }
 554 }
 555
 556 int interface_jtag_add_ir_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 557 {
 558
 559         int j;
 560         int scan_size = 0;
 561         struct jtag_tap *tap, *nextTap;
 562         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 563         {
 564                 nextTap = jtag_tap_next_enabled(tap);
 565                 int pause = (nextTap==NULL);
 566
 567                 int found = 0;
 568
 569                 scan_size = tap->ir_length;
 570
 571                 /* search the list */
 572                 for (j = 0; j < num_fields; j++)
 573                 {
 574                         if (tap == fields[j].tap)
 575                         {
 576                                 found = 1;
 577
 578                                 scanFields(1, fields + j, TAP_IRSHIFT, pause);
 579                                 /* update device information */
 580                                 buf_cpy(fields[j].out_value, tap->cur_instr, scan_size);
 581
 582                                 tap->bypass = 0;
 583                                 break;
 584                         }
 585                 }
 586
 587                 if (!found)
 588                 {
 589                         /* if a device isn't listed, set it to BYPASS */
 590                         uint8_t ones[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
 591
 592                         struct scan_field tmp;
 593                         memset(&tmp, 0, sizeof(tmp));
 594                         tmp.out_value = ones;
 595                         tmp.num_bits = scan_size;
 596                         scanFields(1, &tmp, TAP_IRSHIFT, pause);
 597                         /* update device information */
 598                         buf_cpy(tmp.out_value, tap->cur_instr, scan_size);
 599                         tap->bypass = 1;
 600                 }
 601         }
 602         gotoEndState(state);
 603
 604         return ERROR_OK;
 605 }
 606
 607
 608
 609
 610
 611 int interface_jtag_add_plain_ir_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 612 {
 613         scanFields(num_fields, fields, TAP_IRSHIFT, 1);
 614         gotoEndState(state);
 615
 616         return ERROR_OK;
 617 }
 618
 619 int interface_jtag_add_dr_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 620 {
 621
 622         int j;
 623         struct jtag_tap *tap, *nextTap;
 624         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 625         {
 626                 nextTap = jtag_tap_next_enabled(tap);
 627                 int found = 0;
 628                 int pause = (nextTap==NULL);
 629
 630                 for (j = 0; j < num_fields; j++)
 631                 {
 632                         if (tap == fields[j].tap)
 633                         {
 634                                 found = 1;
 635
 636                                 scanFields(1, fields+j, TAP_DRSHIFT, pause);
 637                         }
 638                 }
 639                 if (!found)
 640                 {
 641                         struct scan_field tmp;
 642                         /* program the scan field to 1 bit length, and ignore it's value */
 643                         tmp.num_bits = 1;
 644                         tmp.out_value = NULL;
 645                         tmp.in_value = NULL;
 646
 647                         scanFields(1, &tmp, TAP_DRSHIFT, pause);
 648                 }
 649                 else
 650                 {
 651                 }
 652         }
 653         gotoEndState(state);
 654         return ERROR_OK;
 655 }
 656
 657 int interface_jtag_add_plain_dr_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 658 {
 659         scanFields(num_fields, fields, TAP_DRSHIFT, 1);
 660         gotoEndState(state);
 661         return ERROR_OK;
 662 }
 663
 664
 665 int interface_jtag_add_tlr()
 666 {
 667         setCurrentState(TAP_RESET);
 668         return ERROR_OK;
 669 }
 670
 671
 672
 673
 674 int interface_jtag_add_reset(int req_trst, int req_srst)
 675 {
 676         zy1000_reset(req_trst, req_srst);
 677         return ERROR_OK;
 678 }
 679
 680 static int zy1000_jtag_add_clocks(int num_cycles, tap_state_t state, tap_state_t clockstate)
 681 {
 682         /* num_cycles can be 0 */
 683         setCurrentState(clockstate);
 684
 685         /* execute num_cycles, 32 at the time. */
 686         int i;
 687         for (i = 0; i < num_cycles; i += 32)
 688         {
 689                 int num;
 690                 num = 32;
 691                 if (num_cycles-i < num)
 692                 {
 693                         num = num_cycles-i;
 694                 }
 695                 shiftValueInner(clockstate, clockstate, num, 0);
 696         }
 697
 698 #if !TEST_MANUAL()
 699         /* finish in end_state */
 700         setCurrentState(state);
 701 #else
 702         tap_state_t t = TAP_IDLE;
 703         /* test manual drive code on any target */
 704         int tms;
 705         uint8_t tms_scan = tap_get_tms_path(t, state);
 706         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 707
 708         for (i = 0; i < tms_count; i++)
 709         {
 710                 tms = (tms_scan >> i) & 1;
 711                 waitIdle();
 712                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28,  tms);
 713         }
 714         waitIdle();
 715         ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, state);
 716 #endif
 717
 718
 719         return ERROR_OK;
 720 }
 721
 722 int interface_jtag_add_runtest(int num_cycles, tap_state_t state)
 723 {
 724         return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE);
 725 }
 726
 727 int interface_jtag_add_clocks(int num_cycles)
 728 {
 729         return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_cur_state);
 730 }
 731
 732 int interface_jtag_add_sleep(uint32_t us)
 733 {
 734         jtag_sleep(us);
 735         return ERROR_OK;
 736 }
 737
 738 int interface_jtag_add_pathmove(int num_states, const tap_state_t *path)
 739 {
 740         int state_count;
 741         int tms = 0;
 742
 743         /*wait for the fifo to be empty*/
 744         waitIdle();
 745
 746         state_count = 0;
 747
 748         tap_state_t cur_state = cmd_queue_cur_state;
 749
 750         while (num_states)
 751         {
 752                 if (tap_state_transition(cur_state, false) == path[state_count])
 753                 {
 754                         tms = 0;
 755                 }
 756                 else if (tap_state_transition(cur_state, true) == path[state_count])
 757                 {
 758                         tms = 1;
 759                 }
 760                 else
 761                 {
 762                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(cur_state), tap_state_name(path[state_count]));
 763                         exit(-1);
 764                 }
 765
 766                 waitIdle();
 767                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28,  tms);
 768
 769                 cur_state = path[state_count];
 770                 state_count++;
 771                 num_states--;
 772         }
 773
 774         waitIdle();
 775         ZY1000_POKE(ZY1000_JTAG_BASE + 0x20,  cur_state);
 776         return ERROR_OK;
 777 }
 778
 779
 780
 781 void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, int little, int count)
 782 {
 783 //      static int const reg_addr = 0x5;
 784         tap_state_t end_state = jtag_get_end_state();
 785         if (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL)) == NULL)
 786         {
 787                 /* better performance via code duplication */
 788                 if (little)
 789                 {
 790                         int i;
 791                         for (i = 0; i < count; i++)
 792                         {
 793                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 1));
 794                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr | (1 << 5));
 795                                 buffer += 4;
 796                         }
 797                 } else
 798                 {
 799                         int i;
 800                         for (i = 0; i < count; i++)
 801                         {
 802                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 0));
 803                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr | (1 << 5));
 804                                 buffer += 4;
 805                         }
 806                 }
 807         }
 808         else
 809         {
 810                 int i;
 811                 for (i = 0; i < count; i++)
 812                 {
 813                         embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 814                         buffer += 4;
 815                 }
 816         }
 817 }
 818
 819