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
  40 static int zy1000_khz(int khz, int *jtag_speed)
  41 {
  42         if (khz == 0)
  43         {
  44                 *jtag_speed = 0;
  45         }
  46         else
  47         {
  48                 *jtag_speed = 64000/khz;
  49         }
  50         return ERROR_OK;
  51 }
  52
  53 static int zy1000_speed_div(int speed, int *khz)
  54 {
  55         if (speed == 0)
  56         {
  57                 *khz = 0;
  58         }
  59         else
  60         {
  61                 *khz = 64000/speed;
  62         }
  63
  64         return ERROR_OK;
  65 }
  66
  67 static bool readPowerDropout(void)
  68 {
  69         cyg_uint32 state;
  70         // sample and clear power dropout
  71         HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x10, 0x80);
  72         HAL_READ_UINT32(ZY1000_JTAG_BASE + 0x10, state);
  73         bool powerDropout;
  74         powerDropout = (state & 0x80) != 0;
  75         return powerDropout;
  76 }
  77
  78
  79 static bool readSRST(void)
  80 {
  81         cyg_uint32 state;
  82         // sample and clear SRST sensing
  83         HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x10, 0x00000040);
  84         HAL_READ_UINT32(ZY1000_JTAG_BASE + 0x10, state);
  85         bool srstAsserted;
  86         srstAsserted = (state & 0x40) != 0;
  87         return srstAsserted;
  88 }
  89
  90 static int zy1000_srst_asserted(int *srst_asserted)
  91 {
  92         *srst_asserted = readSRST();
  93         return ERROR_OK;
  94 }
  95
  96 static int zy1000_power_dropout(int *dropout)
  97 {
  98         *dropout = readPowerDropout();
  99         return ERROR_OK;
 100 }
 101
 102 void zy1000_reset(int trst, int srst)
 103 {
 104         LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst);
 105         if (!srst)
 106         {
 107                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000001);
 108         }
 109         else
 110         {
 111                 /* Danger!!! if clk != 0 when in
 112                  * idle in TAP_IDLE, reset halt on str912 will fail.
 113                  */
 114                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000001);
 115         }
 116
 117         if (!trst)
 118         {
 119                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000002);
 120         }
 121         else
 122         {
 123                 /* assert reset */
 124                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000002);
 125         }
 126
 127         if (trst||(srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
 128         {
 129                 waitIdle();
 130                 /* we're now in the RESET state until trst is deasserted */
 131                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_RESET);
 132         } else
 133         {
 134                 /* We'll get RCLK failure when we assert TRST, so clear any false positives here */
 135                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x400);
 136         }
 137
 138         /* wait for srst to float back up */
 139         if (!srst)
 140         {
 141                 int i;
 142                 for (i = 0; i < 1000; i++)
 143                 {
 144                         // We don't want to sense our own reset, so we clear here.
 145                         // There is of course a timing hole where we could loose
 146                         // a "real" reset.
 147                         if (!readSRST())
 148                                 break;
 149
 150                         /* wait 1ms */
 151                         alive_sleep(1);
 152                 }
 153
 154                 if (i == 1000)
 155                 {
 156                         LOG_USER("SRST didn't deassert after %dms", i);
 157                 } else if (i > 1)
 158                 {
 159                         LOG_USER("SRST took %dms to deassert", i);
 160                 }
 161         }
 162 }
 163
 164 int zy1000_speed(int speed)
 165 {
 166         if (speed == 0)
 167         {
 168                 /*0 means RCLK*/
 169                 speed = 0;
 170                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x100);
 171                 LOG_DEBUG("jtag_speed using RCLK");
 172         }
 173         else
 174         {
 175                 if (speed > 8190 || speed < 2)
 176                 {
 177                         LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz");
 178                         return ERROR_INVALID_ARGUMENTS;
 179                 }
 180
 181                 LOG_USER("jtag_speed %d => JTAG clk=%f", speed, 64.0/(float)speed);
 182                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x100);
 183                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x1c, speed&~1);
 184         }
 185         return ERROR_OK;
 186 }
 187
 188 static bool savePower;
 189
 190
 191 static void setPower(bool power)
 192 {
 193         savePower = power;
 194         if (power)
 195         {
 196                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x14, 0x8);
 197         } else
 198         {
 199                 HAL_WRITE_UINT32(ZY1000_JTAG_BASE + 0x10, 0x8);
 200         }
 201 }
 202
 203 COMMAND_HANDLER(handle_power_command)
 204 {
 205         switch (CMD_ARGC)
 206         {
 207         case 1: {
 208                 bool enable;
 209                 COMMAND_PARSE_ON_OFF(CMD_ARGV[0], enable);
 210                 setPower(enable);
 211                 // fall through
 212         }
 213         case 0:
 214                 LOG_INFO("Target power %s", savePower ? "on" : "off");
 215                 break;
 216         default:
 217                 return ERROR_INVALID_ARGUMENTS;
 218         }
 219
 220         return ERROR_OK;
 221 }
 222
 223
 224 /* Give TELNET a way to find out what version this is */
 225 static int jim_zy1000_version(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 226 {
 227         if ((argc < 1) || (argc > 3))
 228                 return JIM_ERR;
 229         const char *version_str = NULL;
 230
 231         if (argc == 1)
 232         {
 233                 version_str = ZYLIN_OPENOCD_VERSION;
 234         } else
 235         {
 236                 const char *str = Jim_GetString(argv[1], NULL);
 237                 const char *str2 = NULL;
 238                 if (argc > 2)
 239                         str2 = Jim_GetString(argv[2], NULL);
 240                 if (strcmp("openocd", str) == 0)
 241                 {
 242                         version_str = ZYLIN_OPENOCD;
 243                 }
 244                 else if (strcmp("zy1000", str) == 0)
 245                 {
 246                         version_str = ZYLIN_VERSION;
 247                 }
 248                 else if (strcmp("date", str) == 0)
 249                 {
 250                         version_str = ZYLIN_DATE;
 251                 }
 252                 else if (strcmp("time", str) == 0)
 253                 {
 254                         version_str = ZYLIN_TIME;
 255                 }
 256                 else if (strcmp("pcb", str) == 0)
 257                 {
 258 #ifdef CYGPKG_HAL_NIOS2
 259                         version_str="c";
 260 #else
 261                         version_str="b";
 262 #endif
 263                 }
 264 #ifdef CYGPKG_HAL_NIOS2
 265                 else if (strcmp("fpga", str) == 0)
 266                 {
 267
 268                         /* return a list of 32 bit integers to describe the expected
 269                          * and actual FPGA
 270                          */
 271                         static char *fpga_id = "0x12345678 0x12345678 0x12345678 0x12345678";
 272                         cyg_uint32 id, timestamp;
 273                         HAL_READ_UINT32(SYSID_BASE, id);
 274                         HAL_READ_UINT32(SYSID_BASE+4, timestamp);
 275                         sprintf(fpga_id, "0x%08x 0x%08x 0x%08x 0x%08x", id, timestamp, SYSID_ID, SYSID_TIMESTAMP);
 276                         version_str = fpga_id;
 277                         if ((argc>2) && (strcmp("time", str2) == 0))
 278                         {
 279                             time_t last_mod = timestamp;
 280                             char * t = ctime (&last_mod) ;
 281                             t[strlen(t)-1] = 0;
 282                             version_str = t;
 283                         }
 284                 }
 285 #endif
 286
 287                 else
 288                 {
 289                         return JIM_ERR;
 290                 }
 291         }
 292
 293         Jim_SetResult(interp, Jim_NewStringObj(interp, version_str, -1));
 294
 295         return JIM_OK;
 296 }
 297
 298
 299 #ifdef CYGPKG_HAL_NIOS2
 300 static int jim_zy1000_writefirmware(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 301 {
 302         if (argc != 2)
 303                 return JIM_ERR;
 304
 305         int length;
 306         int stat;
 307         const char *str = Jim_GetString(argv[1], &length);
 308
 309         /* BUG!!!! skip header! */
 310         void *firmware_address=0x4000000;
 311         int firmware_length=0x100000;
 312
 313         if (length>firmware_length)
 314                 return JIM_ERR;
 315
 316         void *err_addr;
 317
 318     if ((stat = flash_erase((void *)firmware_address, firmware_length, (void **)&err_addr)) != 0)
 319     {
 320         return JIM_ERR;
 321     }
 322
 323     if ((stat = flash_program(firmware_address, str, length, (void **)&err_addr)) != 0)
 324         return JIM_ERR;
 325
 326     return JIM_OK;
 327 }
 328 #endif
 329
 330 static int
 331 zylinjtag_Jim_Command_powerstatus(Jim_Interp *interp,
 332                                                                    int argc,
 333                 Jim_Obj * const *argv)
 334 {
 335         if (argc != 1)
 336         {
 337                 Jim_WrongNumArgs(interp, 1, argv, "powerstatus");
 338                 return JIM_ERR;
 339         }
 340
 341         cyg_uint32 status;
 342         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, status);
 343
 344         Jim_SetResult(interp, Jim_NewIntObj(interp, (status&0x80) != 0));
 345
 346         return JIM_OK;
 347 }
 348
 349
 350
 351
 352 int zy1000_init(void)
 353 {
 354         LOG_USER("%s", ZYLIN_OPENOCD_VERSION);
 355
 356         ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x30); // Turn on LED1 & LED2
 357
 358         setPower(true); // on by default
 359
 360
 361          /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
 362         zy1000_reset(0, 0);
 363         zy1000_speed(jtag_get_speed());
 364
 365         return ERROR_OK;
 366 }
 367
 368 int zy1000_quit(void)
 369 {
 370
 371         return ERROR_OK;
 372 }
 373
 374
 375
 376 int interface_jtag_execute_queue(void)
 377 {
 378         cyg_uint32 empty;
 379
 380         waitIdle();
 381         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
 382         /* clear JTAG error register */
 383         ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x400);
 384
 385         if ((empty&0x400) != 0)
 386         {
 387                 LOG_WARNING("RCLK timeout");
 388                 /* the error is informative only as we don't want to break the firmware if there
 389                  * is a false positive.
 390                  */
 391 //              return ERROR_FAIL;
 392         }
 393         return ERROR_OK;
 394 }
 395
 396
 397
 398
 399
 400 static cyg_uint32 getShiftValue(void)
 401 {
 402         cyg_uint32 value;
 403         waitIdle();
 404         ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, value);
 405         VERBOSE(LOG_INFO("getShiftValue %08x", value));
 406         return value;
 407 }
 408 #if 0
 409 static cyg_uint32 getShiftValueFlip(void)
 410 {
 411         cyg_uint32 value;
 412         waitIdle();
 413         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x18, value);
 414         VERBOSE(LOG_INFO("getShiftValue %08x (flipped)", value));
 415         return value;
 416 }
 417 #endif
 418
 419 #if 0
 420 static void shiftValueInnerFlip(const tap_state_t state, const tap_state_t endState, int repeat, cyg_uint32 value)
 421 {
 422         VERBOSE(LOG_INFO("shiftValueInner %s %s %d %08x (flipped)", tap_state_name(state), tap_state_name(endState), repeat, value));
 423         cyg_uint32 a,b;
 424         a = state;
 425         b = endState;
 426         ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value);
 427         ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 15) | (repeat << 8) | (a << 4) | b);
 428         VERBOSE(getShiftValueFlip());
 429 }
 430 #endif
 431
 432 static void gotoEndState(tap_state_t end_state)
 433 {
 434         setCurrentState(end_state);
 435 }
 436
 437 static __inline void scanFields(int num_fields, const struct scan_field *fields, tap_state_t shiftState, int pause)
 438 {
 439         int i;
 440         int j;
 441         int k;
 442
 443         for (i = 0; i < num_fields; i++)
 444         {
 445                 cyg_uint32 value;
 446
 447                 uint8_t *inBuffer = NULL;
 448
 449
 450                 // figure out where to store the input data
 451                 int num_bits = fields[i].num_bits;
 452                 if (fields[i].in_value != NULL)
 453                 {
 454                         inBuffer = fields[i].in_value;
 455                 }
 456
 457                 // here we shuffle N bits out/in
 458                 j = 0;
 459                 while (j < num_bits)
 460                 {
 461                         tap_state_t pause_state;
 462                         int l;
 463                         k = num_bits-j;
 464                         pause_state = (shiftState == TAP_DRSHIFT)?TAP_DRSHIFT:TAP_IRSHIFT;
 465                         if (k > 32)
 466                         {
 467                                 k = 32;
 468                                 /* we have more to shift out */
 469                         } else if (pause&&(i == num_fields-1))
 470                         {
 471                                 /* this was the last to shift out this time */
 472                                 pause_state = (shiftState==TAP_DRSHIFT)?TAP_DRPAUSE:TAP_IRPAUSE;
 473                         }
 474
 475                         // we have (num_bits + 7)/8 bytes of bits to toggle out.
 476                         // bits are pushed out LSB to MSB
 477                         value = 0;
 478                         if (fields[i].out_value != NULL)
 479                         {
 480                                 for (l = 0; l < k; l += 8)
 481                                 {
 482                                         value|=fields[i].out_value[(j + l)/8]<<l;
 483                                 }
 484                         }
 485                         /* mask away unused bits for easier debugging */
 486                         if (k < 32)
 487                         {
 488                                 value&=~(((uint32_t)0xffffffff) << k);
 489                         } else
 490                         {
 491                                 /* Shifting by >= 32 is not defined by the C standard
 492                                  * and will in fact shift by &0x1f bits on nios */
 493                         }
 494
 495                         shiftValueInner(shiftState, pause_state, k, value);
 496
 497                         if (inBuffer != NULL)
 498                         {
 499                                 // data in, LSB to MSB
 500                                 value = getShiftValue();
 501                                 // we're shifting in data to MSB, shift data to be aligned for returning the value
 502                                 value >>= 32-k;
 503
 504                                 for (l = 0; l < k; l += 8)
 505                                 {
 506                                         inBuffer[(j + l)/8]=(value >> l)&0xff;
 507                                 }
 508                         }
 509                         j += k;
 510                 }
 511         }
 512 }
 513
 514 int interface_jtag_add_ir_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 515 {
 516
 517         int j;
 518         int scan_size = 0;
 519         struct jtag_tap *tap, *nextTap;
 520         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 521         {
 522                 nextTap = jtag_tap_next_enabled(tap);
 523                 int pause = (nextTap==NULL);
 524
 525                 int found = 0;
 526
 527                 scan_size = tap->ir_length;
 528
 529                 /* search the list */
 530                 for (j = 0; j < num_fields; j++)
 531                 {
 532                         if (tap == fields[j].tap)
 533                         {
 534                                 found = 1;
 535
 536                                 scanFields(1, fields + j, TAP_IRSHIFT, pause);
 537                                 /* update device information */
 538                                 buf_cpy(fields[j].out_value, tap->cur_instr, scan_size);
 539
 540                                 tap->bypass = 0;
 541                                 break;
 542                         }
 543                 }
 544
 545                 if (!found)
 546                 {
 547                         /* if a device isn't listed, set it to BYPASS */
 548                         uint8_t ones[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
 549
 550                         struct scan_field tmp;
 551                         memset(&tmp, 0, sizeof(tmp));
 552                         tmp.out_value = ones;
 553                         tmp.num_bits = scan_size;
 554                         scanFields(1, &tmp, TAP_IRSHIFT, pause);
 555                         /* update device information */
 556                         buf_cpy(tmp.out_value, tap->cur_instr, scan_size);
 557                         tap->bypass = 1;
 558                 }
 559         }
 560         gotoEndState(state);
 561
 562         return ERROR_OK;
 563 }
 564
 565
 566
 567
 568
 569 int interface_jtag_add_plain_ir_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 570 {
 571         scanFields(num_fields, fields, TAP_IRSHIFT, 1);
 572         gotoEndState(state);
 573
 574         return ERROR_OK;
 575 }
 576
 577 int interface_jtag_add_dr_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 578 {
 579
 580         int j;
 581         struct jtag_tap *tap, *nextTap;
 582         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 583         {
 584                 nextTap = jtag_tap_next_enabled(tap);
 585                 int found = 0;
 586                 int pause = (nextTap==NULL);
 587
 588                 for (j = 0; j < num_fields; j++)
 589                 {
 590                         if (tap == fields[j].tap)
 591                         {
 592                                 found = 1;
 593
 594                                 scanFields(1, fields+j, TAP_DRSHIFT, pause);
 595                         }
 596                 }
 597                 if (!found)
 598                 {
 599                         struct scan_field tmp;
 600                         /* program the scan field to 1 bit length, and ignore it's value */
 601                         tmp.num_bits = 1;
 602                         tmp.out_value = NULL;
 603                         tmp.in_value = NULL;
 604
 605                         scanFields(1, &tmp, TAP_DRSHIFT, pause);
 606                 }
 607                 else
 608                 {
 609                 }
 610         }
 611         gotoEndState(state);
 612         return ERROR_OK;
 613 }
 614
 615 int interface_jtag_add_plain_dr_scan(int num_fields, const struct scan_field *fields, tap_state_t state)
 616 {
 617         scanFields(num_fields, fields, TAP_DRSHIFT, 1);
 618         gotoEndState(state);
 619         return ERROR_OK;
 620 }
 621
 622
 623 int interface_jtag_add_tlr()
 624 {
 625         setCurrentState(TAP_RESET);
 626         return ERROR_OK;
 627 }
 628
 629
 630
 631
 632 int interface_jtag_add_reset(int req_trst, int req_srst)
 633 {
 634         zy1000_reset(req_trst, req_srst);
 635         return ERROR_OK;
 636 }
 637
 638 static int zy1000_jtag_add_clocks(int num_cycles, tap_state_t state, tap_state_t clockstate)
 639 {
 640         /* num_cycles can be 0 */
 641         setCurrentState(clockstate);
 642
 643         /* execute num_cycles, 32 at the time. */
 644         int i;
 645         for (i = 0; i < num_cycles; i += 32)
 646         {
 647                 int num;
 648                 num = 32;
 649                 if (num_cycles-i < num)
 650                 {
 651                         num = num_cycles-i;
 652                 }
 653                 shiftValueInner(clockstate, clockstate, num, 0);
 654         }
 655
 656 #if !TEST_MANUAL()
 657         /* finish in end_state */
 658         setCurrentState(state);
 659 #else
 660         tap_state_t t = TAP_IDLE;
 661         /* test manual drive code on any target */
 662         int tms;
 663         uint8_t tms_scan = tap_get_tms_path(t, state);
 664         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 665
 666         for (i = 0; i < tms_count; i++)
 667         {
 668                 tms = (tms_scan >> i) & 1;
 669                 waitIdle();
 670                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28,  tms);
 671         }
 672         waitIdle();
 673         ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, state);
 674 #endif
 675
 676
 677         return ERROR_OK;
 678 }
 679
 680 int interface_jtag_add_runtest(int num_cycles, tap_state_t state)
 681 {
 682         return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE);
 683 }
 684
 685 int interface_jtag_add_clocks(int num_cycles)
 686 {
 687         return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_cur_state);
 688 }
 689
 690 int interface_jtag_add_sleep(uint32_t us)
 691 {
 692         jtag_sleep(us);
 693         return ERROR_OK;
 694 }
 695
 696 int interface_jtag_add_pathmove(int num_states, const tap_state_t *path)
 697 {
 698         int state_count;
 699         int tms = 0;
 700
 701         /*wait for the fifo to be empty*/
 702         waitIdle();
 703
 704         state_count = 0;
 705
 706         tap_state_t cur_state = cmd_queue_cur_state;
 707
 708         while (num_states)
 709         {
 710                 if (tap_state_transition(cur_state, false) == path[state_count])
 711                 {
 712                         tms = 0;
 713                 }
 714                 else if (tap_state_transition(cur_state, true) == path[state_count])
 715                 {
 716                         tms = 1;
 717                 }
 718                 else
 719                 {
 720                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(cur_state), tap_state_name(path[state_count]));
 721                         exit(-1);
 722                 }
 723
 724                 waitIdle();
 725                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28,  tms);
 726
 727                 cur_state = path[state_count];
 728                 state_count++;
 729                 num_states--;
 730         }
 731
 732         waitIdle();
 733         ZY1000_POKE(ZY1000_JTAG_BASE + 0x20,  cur_state);
 734         return ERROR_OK;
 735 }
 736
 737
 738
 739 void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, int little, int count)
 740 {
 741 //      static int const reg_addr = 0x5;
 742         tap_state_t end_state = jtag_get_end_state();
 743         if (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL)) == NULL)
 744         {
 745                 /* better performance via code duplication */
 746                 if (little)
 747                 {
 748                         int i;
 749                         for (i = 0; i < count; i++)
 750                         {
 751                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 1));
 752                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr | (1 << 5));
 753                                 buffer += 4;
 754                         }
 755                 } else
 756                 {
 757                         int i;
 758                         for (i = 0; i < count; i++)
 759                         {
 760                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, 0));
 761                                 shiftValueInner(TAP_DRSHIFT, end_state, 6, reg_addr | (1 << 5));
 762                                 buffer += 4;
 763                         }
 764                 }
 765         }
 766         else
 767         {
 768                 int i;
 769                 for (i = 0; i < count; i++)
 770                 {
 771                         embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 772                         buffer += 4;
 773                 }
 774         }
 775 }
 776
 777
 778 static const struct command_registration zy1000_commands[] = {
 779         {
 780                 .name = "power",
 781                 .handler = &handle_power_command,
 782                 .mode = COMMAND_ANY,
 783                 .help = "turn power switch to target on/off. No arguments - print status.",
 784                 .usage = "power <on/off>",
 785         },
 786         {
 787                 .name = "zy1000_version",
 788                 .mode = COMMAND_ANY,
 789                 .jim_handler = &jim_zy1000_version,
 790                 .help = "print version info for zy1000",
 791         },
 792         {
 793                 .name = "powerstatus",
 794                 .mode = COMMAND_ANY,
 795                 .jim_handler = & zylinjtag_Jim_Command_powerstatus,
 796                 .help = "print power status of target",
 797         },
 798 #ifdef CYGPKG_HAL_NIOS2
 799         {
 800                 .name = "updatezy1000firmware",
 801                 .mode = COMMAND_ANY,
 802                 .jim_handler = &jim_zy1000_writefirmware,
 803                 .help = "writes firmware to flash",
 804         },
 805 #endif
 806         COMMAND_REGISTRATION_DONE
 807 };
 808
 809
 810
 811 struct jtag_interface zy1000_interface =
 812 {
 813         .name = "ZY1000",
 814         .execute_queue = NULL,
 815         .speed = zy1000_speed,
 816         .commands = zy1000_commands,
 817         .init = zy1000_init,
 818         .quit = zy1000_quit,
 819         .khz = zy1000_khz,
 820         .speed_div = zy1000_speed_div,
 821         .power_dropout = zy1000_power_dropout,
 822         .srst_asserted = zy1000_srst_asserted,
 823 };
 824