src/jtag/zy1000/zy1000.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007-2010 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
  20 /* This file supports the zy1000 debugger: http://www.zylin.com/zy1000.html
  21  *
  22  * The zy1000 is a standalone debugger that has a web interface and
  23  * requires no drivers on the developer host as all communication
  24  * is via TCP/IP. The zy1000 gets it performance(~400-700kBytes/s
  25  * DCC downloads @ 16MHz target) as it has an FPGA to hardware
  26  * accelerate the JTAG commands, while offering *very* low latency
  27  * between OpenOCD and the FPGA registers.
  28  *
  29  * The disadvantage of the zy1000 is that it has a feeble CPU compared to
  30  * a PC(ca. 50-500 DMIPS depending on how one counts it), whereas a PC
  31  * is on the order of 10000 DMIPS(i.e. at a factor of 20-200).
  32  *
  33  * The zy1000 revc hardware is using an Altera Nios CPU, whereas the
  34  * revb is using ARM7 + Xilinx.
  35  *
  36  * See Zylin web pages or contact Zylin for more information.
  37  *
  38  * The reason this code is in OpenOCD rather than OpenOCD linked with the
  39  * ZY1000 code is that OpenOCD is the long road towards getting
  40  * libopenocd into place. libopenocd will support both low performance,
  41  * low latency systems(embedded) and high performance high latency
  42  * systems(PCs).
  43  */
  44 #ifdef HAVE_CONFIG_H
  45 #include "config.h"
  46 #endif
  47
  48 #include <target/embeddedice.h>
  49 #include <jtag/minidriver.h>
  50 #include <jtag/interface.h>
  51 #include <time.h>
  52 #include <helper/time_support.h>
  53
  54 #include <netinet/tcp.h>
  55
  56 #if BUILD_ECOSBOARD
  57 #include "zy1000_version.h"
  58
  59 #include <cyg/hal/hal_io.h>             // low level i/o
  60 #include <cyg/hal/hal_diag.h>
  61
  62 #ifdef CYGPKG_HAL_NIOS2
  63 #include <cyg/hal/io.h>
  64 #include <cyg/firmwareutil/firmwareutil.h>
  65 #endif
  66
  67 #define ZYLIN_VERSION GIT_ZY1000_VERSION
  68 #define ZYLIN_DATE __DATE__
  69 #define ZYLIN_TIME __TIME__
  70 #define ZYLIN_OPENOCD GIT_OPENOCD_VERSION
  71 #define ZYLIN_OPENOCD_VERSION "ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE
  72
  73 #endif
  74
  75
  76 /* The software needs to check if it's in RCLK mode or not */
  77 static bool zy1000_rclk = false;
  78
  79 static int zy1000_khz(int khz, int *jtag_speed)
  80 {
  81         if (khz == 0)
  82         {
  83                 *jtag_speed = 0;
  84         }
  85         else
  86         {
  87                 *jtag_speed = 64000/khz;
  88         }
  89         return ERROR_OK;
  90 }
  91
  92 static int zy1000_speed_div(int speed, int *khz)
  93 {
  94         if (speed == 0)
  95         {
  96                 *khz = 0;
  97         }
  98         else
  99         {
 100                 *khz = 64000/speed;
 101         }
 102
 103         return ERROR_OK;
 104 }
 105
 106 static bool readPowerDropout(void)
 107 {
 108         uint32_t state;
 109         // sample and clear power dropout
 110         ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x80);
 111         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, state);
 112         bool powerDropout;
 113         powerDropout = (state & 0x80) != 0;
 114         return powerDropout;
 115 }
 116
 117
 118 static bool readSRST(void)
 119 {
 120         uint32_t state;
 121         // sample and clear SRST sensing
 122         ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000040);
 123         ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, state);
 124         bool srstAsserted;
 125         srstAsserted = (state & 0x40) != 0;
 126         return srstAsserted;
 127 }
 128
 129 static int zy1000_srst_asserted(int *srst_asserted)
 130 {
 131         *srst_asserted = readSRST();
 132         return ERROR_OK;
 133 }
 134
 135 static int zy1000_power_dropout(int *dropout)
 136 {
 137         *dropout = readPowerDropout();
 138         return ERROR_OK;
 139 }
 140
 141 void zy1000_reset(int trst, int srst)
 142 {
 143         LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst);
 144
 145         /* flush the JTAG FIFO. Not flushing the queue before messing with
 146          * reset has such interesting bugs as causing hard to reproduce
 147          * RCLK bugs as RCLK will stop responding when TRST is asserted
 148          */
 149         waitIdle();
 150
 151         if (!srst)
 152         {
 153                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000001);
 154         }
 155         else
 156         {
 157                 /* Danger!!! if clk != 0 when in
 158                  * idle in TAP_IDLE, reset halt on str912 will fail.
 159                  */
 160                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000001);
 161         }
 162
 163         if (!trst)
 164         {
 165                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000002);
 166         }
 167         else
 168         {
 169                 /* assert reset */
 170                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x00000002);
 171         }
 172
 173         if (trst||(srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
 174         {
 175                 /* we're now in the RESET state until trst is deasserted */
 176                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_RESET);
 177         } else
 178         {
 179                 /* We'll get RCLK failure when we assert TRST, so clear any false positives here */
 180                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x400);
 181         }
 182
 183         /* wait for srst to float back up */
 184         if ((!srst && ((jtag_get_reset_config() & RESET_TRST_PULLS_SRST) == 0))||
 185                 (!srst && !trst && (jtag_get_reset_config() & RESET_TRST_PULLS_SRST)))
 186         {
 187                 bool first = true;
 188                 long long start = 0;
 189                 long total = 0;
 190                 for (;;)
 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                         {
 197                                 if (total > 1)
 198                                 {
 199                                   LOG_USER("SRST took %dms to deassert", (int)total);
 200                                 }
 201                                 break;
 202                         }
 203
 204                         if (first)
 205                         {
 206                             first = false;
 207                             start = timeval_ms();
 208                         }
 209
 210                         total = timeval_ms() - start;
 211
 212                         keep_alive();
 213
 214                         if (total > 5000)
 215                         {
 216                                 LOG_ERROR("SRST took too long to deassert: %dms", (int)total);
 217                             break;
 218                         }
 219                 }
 220
 221         }
 222 }
 223
 224 int zy1000_speed(int speed)
 225 {
 226         /* flush JTAG master FIFO before setting speed */
 227         waitIdle();
 228
 229         zy1000_rclk = false;
 230
 231         if (speed == 0)
 232         {
 233                 /*0 means RCLK*/
 234                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x100);
 235                 zy1000_rclk = true;
 236                 LOG_DEBUG("jtag_speed using RCLK");
 237         }
 238         else
 239         {
 240                 if (speed > 8190 || speed < 2)
 241                 {
 242                         LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz");
 243                         return ERROR_INVALID_ARGUMENTS;
 244                 }
 245
 246                 LOG_USER("jtag_speed %d => JTAG clk=%f", speed, 64.0/(float)speed);
 247                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x100);
 248                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x1c, speed&~1);
 249         }
 250         return ERROR_OK;
 251 }
 252
 253 static bool savePower;
 254
 255
 256 static void setPower(bool power)
 257 {
 258         savePower = power;
 259         if (power)
 260         {
 261                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x8);
 262         } else
 263         {
 264                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x8);
 265         }
 266 }
 267
 268 COMMAND_HANDLER(handle_power_command)
 269 {
 270         switch (CMD_ARGC)
 271         {
 272         case 1: {
 273                 bool enable;
 274                 COMMAND_PARSE_ON_OFF(CMD_ARGV[0], enable);
 275                 setPower(enable);
 276                 // fall through
 277         }
 278         case 0:
 279                 LOG_INFO("Target power %s", savePower ? "on" : "off");
 280                 break;
 281         default:
 282                 return ERROR_INVALID_ARGUMENTS;
 283         }
 284
 285         return ERROR_OK;
 286 }
 287
 288 #if !BUILD_ECOSBOARD
 289 static char *tcp_server = "notspecified";
 290 static int jim_zy1000_server(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 291 {
 292         if (argc != 2)
 293                 return JIM_ERR;
 294
 295         tcp_server = strdup(Jim_GetString(argv[1], NULL));
 296
 297         return JIM_OK;
 298 }
 299 #endif
 300
 301 #if BUILD_ECOSBOARD
 302 /* Give TELNET a way to find out what version this is */
 303 static int jim_zy1000_version(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 304 {
 305         if ((argc < 1) || (argc > 3))
 306                 return JIM_ERR;
 307         const char *version_str = NULL;
 308
 309         if (argc == 1)
 310         {
 311                 version_str = ZYLIN_OPENOCD_VERSION;
 312         } else
 313         {
 314                 const char *str = Jim_GetString(argv[1], NULL);
 315                 const char *str2 = NULL;
 316                 if (argc > 2)
 317                         str2 = Jim_GetString(argv[2], NULL);
 318                 if (strcmp("openocd", str) == 0)
 319                 {
 320                         version_str = ZYLIN_OPENOCD;
 321                 }
 322                 else if (strcmp("zy1000", str) == 0)
 323                 {
 324                         version_str = ZYLIN_VERSION;
 325                 }
 326                 else if (strcmp("date", str) == 0)
 327                 {
 328                         version_str = ZYLIN_DATE;
 329                 }
 330                 else if (strcmp("time", str) == 0)
 331                 {
 332                         version_str = ZYLIN_TIME;
 333                 }
 334                 else if (strcmp("pcb", str) == 0)
 335                 {
 336 #ifdef CYGPKG_HAL_NIOS2
 337                         version_str="c";
 338 #else
 339                         version_str="b";
 340 #endif
 341                 }
 342 #ifdef CYGPKG_HAL_NIOS2
 343                 else if (strcmp("fpga", str) == 0)
 344                 {
 345
 346                         /* return a list of 32 bit integers to describe the expected
 347                          * and actual FPGA
 348                          */
 349                         static char *fpga_id = "0x12345678 0x12345678 0x12345678 0x12345678";
 350                         uint32_t id, timestamp;
 351                         HAL_READ_UINT32(SYSID_BASE, id);
 352                         HAL_READ_UINT32(SYSID_BASE+4, timestamp);
 353                         sprintf(fpga_id, "0x%08x 0x%08x 0x%08x 0x%08x", id, timestamp, SYSID_ID, SYSID_TIMESTAMP);
 354                         version_str = fpga_id;
 355                         if ((argc>2) && (strcmp("time", str2) == 0))
 356                         {
 357                             time_t last_mod = timestamp;
 358                             char * t = ctime (&last_mod) ;
 359                             t[strlen(t)-1] = 0;
 360                             version_str = t;
 361                         }
 362                 }
 363 #endif
 364
 365                 else
 366                 {
 367                         return JIM_ERR;
 368                 }
 369         }
 370
 371         Jim_SetResult(interp, Jim_NewStringObj(interp, version_str, -1));
 372
 373         return JIM_OK;
 374 }
 375 #endif
 376
 377 #ifdef CYGPKG_HAL_NIOS2
 378
 379
 380 struct info_forward
 381 {
 382         void *data;
 383         struct cyg_upgrade_info *upgraded_file;
 384 };
 385
 386 static void report_info(void *data, const char * format, va_list args)
 387 {
 388         char *s = alloc_vprintf(format, args);
 389         LOG_USER_N("%s", s);
 390         free(s);
 391 }
 392
 393 struct cyg_upgrade_info firmware_info =
 394 {
 395                 (uint8_t *)0x84000000,
 396                 "/ram/firmware.phi",
 397                 "Firmware",
 398                 0x0300000,
 399                 0x1f00000 -
 400                 0x0300000,
 401                 "ZylinNiosFirmware\n",
 402                 report_info,
 403 };
 404
 405 static int jim_zy1000_writefirmware(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 406 {
 407         if (argc != 2)
 408                 return JIM_ERR;
 409
 410         int length;
 411         const char *str = Jim_GetString(argv[1], &length);
 412
 413         /* */
 414         int tmpFile;
 415         if ((tmpFile = open(firmware_info.file, O_RDWR | O_CREAT | O_TRUNC)) <= 0)
 416         {
 417                 return JIM_ERR;
 418         }
 419         bool success;
 420         success = write(tmpFile, str, length) == length;
 421         close(tmpFile);
 422         if (!success)
 423                 return JIM_ERR;
 424
 425         if (!cyg_firmware_upgrade(NULL, firmware_info))
 426                 return JIM_ERR;
 427
 428         return JIM_OK;
 429 }
 430 #endif
 431
 432 static int
 433 zylinjtag_Jim_Command_powerstatus(Jim_Interp *interp,
 434                                                                    int argc,
 435                 Jim_Obj * const *argv)
 436 {
 437         if (argc != 1)
 438         {
 439                 Jim_WrongNumArgs(interp, 1, argv, "powerstatus");
 440                 return JIM_ERR;
 441         }
 442
 443         bool dropout = readPowerDropout();
 444
 445         Jim_SetResult(interp, Jim_NewIntObj(interp, dropout));
 446
 447         return JIM_OK;
 448 }
 449
 450
 451
 452 int zy1000_quit(void)
 453 {
 454
 455         return ERROR_OK;
 456 }
 457
 458
 459
 460 int interface_jtag_execute_queue(void)
 461 {
 462         uint32_t empty;
 463
 464         waitIdle();
 465
 466         /* We must make sure to write data read back to memory location before we return
 467          * from this fn
 468          */
 469         zy1000_flush_readqueue();
 470
 471         /* and handle any callbacks... */
 472         zy1000_flush_callbackqueue();
 473
 474         if (zy1000_rclk)
 475         {
 476                 /* Only check for errors when using RCLK to speed up
 477                  * jtag over TCP/IP
 478                  */
 479                 ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
 480                 /* clear JTAG error register */
 481                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x400);
 482
 483                 if ((empty&0x400) != 0)
 484                 {
 485                         LOG_WARNING("RCLK timeout");
 486                         /* the error is informative only as we don't want to break the firmware if there
 487                          * is a false positive.
 488                          */
 489         //              return ERROR_FAIL;
 490                 }
 491         }
 492         return ERROR_OK;
 493 }
 494
 495
 496
 497
 498 static void writeShiftValue(uint8_t *data, int bits);
 499
 500 // here we shuffle N bits out/in
 501 static __inline void scanBits(const uint8_t *out_value, uint8_t *in_value, int num_bits, bool pause_now, tap_state_t shiftState, tap_state_t end_state)
 502 {
 503         tap_state_t pause_state = shiftState;
 504         for (int j = 0; j < num_bits; j += 32)
 505         {
 506                 int k = num_bits - j;
 507                 if (k > 32)
 508                 {
 509                         k = 32;
 510                         /* we have more to shift out */
 511                 } else if (pause_now)
 512                 {
 513                         /* this was the last to shift out this time */
 514                         pause_state = end_state;
 515                 }
 516
 517                 // we have (num_bits + 7)/8 bytes of bits to toggle out.
 518                 // bits are pushed out LSB to MSB
 519                 uint32_t value;
 520                 value = 0;
 521                 if (out_value != NULL)
 522                 {
 523                         for (int l = 0; l < k; l += 8)
 524                         {
 525                                 value|=out_value[(j + l)/8]<<l;
 526                         }
 527                 }
 528                 /* mask away unused bits for easier debugging */
 529                 if (k < 32)
 530                 {
 531                         value&=~(((uint32_t)0xffffffff) << k);
 532                 } else
 533                 {
 534                         /* Shifting by >= 32 is not defined by the C standard
 535                          * and will in fact shift by &0x1f bits on nios */
 536                 }
 537
 538                 shiftValueInner(shiftState, pause_state, k, value);
 539
 540                 if (in_value != NULL)
 541                 {
 542                         writeShiftValue(in_value + (j/8), k);
 543                 }
 544         }
 545 }
 546
 547 static __inline void scanFields(int num_fields, const struct scan_field *fields, tap_state_t shiftState, tap_state_t end_state)
 548 {
 549         for (int i = 0; i < num_fields; i++)
 550         {
 551                 scanBits(fields[i].out_value,
 552                                 fields[i].in_value,
 553                                 fields[i].num_bits,
 554                                 (i == num_fields-1),
 555                                 shiftState,
 556                                 end_state);
 557         }
 558 }
 559
 560 int interface_jtag_add_ir_scan(struct jtag_tap *active, const struct scan_field *fields, tap_state_t state)
 561 {
 562         int scan_size = 0;
 563         struct jtag_tap *tap, *nextTap;
 564         tap_state_t pause_state = TAP_IRSHIFT;
 565
 566         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 567         {
 568                 nextTap = jtag_tap_next_enabled(tap);
 569                 if (nextTap==NULL)
 570                 {
 571                         pause_state = state;
 572                 }
 573                 scan_size = tap->ir_length;
 574
 575                 /* search the list */
 576                 if (tap == active)
 577                 {
 578                         scanFields(1, fields, TAP_IRSHIFT, pause_state);
 579                         /* update device information */
 580                         buf_cpy(fields[0].out_value, tap->cur_instr, scan_size);
 581
 582                         tap->bypass = 0;
 583                 } else
 584                 {
 585                         /* if a device isn't listed, set it to BYPASS */
 586                         assert(scan_size <= 32);
 587                         shiftValueInner(TAP_IRSHIFT, pause_state, scan_size, 0xffffffff);
 588
 589                         tap->bypass = 1;
 590                 }
 591         }
 592
 593         return ERROR_OK;
 594 }
 595
 596
 597
 598
 599
 600 int interface_jtag_add_plain_ir_scan(int num_bits, const uint8_t *out_bits, uint8_t *in_bits, tap_state_t state)
 601 {
 602         scanBits(out_bits, in_bits, num_bits, true, TAP_IRSHIFT, state);
 603         return ERROR_OK;
 604 }
 605
 606 int interface_jtag_add_dr_scan(struct jtag_tap *active, int num_fields, const struct scan_field *fields, tap_state_t state)
 607 {
 608         struct jtag_tap *tap, *nextTap;
 609         tap_state_t pause_state = TAP_DRSHIFT;
 610         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 611         {
 612                 nextTap = jtag_tap_next_enabled(tap);
 613                 if (nextTap==NULL)
 614                 {
 615                         pause_state = state;
 616                 }
 617
 618                 /* Find a range of fields to write to this tap */
 619                 if (tap == active)
 620                 {
 621                         assert(!tap->bypass);
 622
 623                         scanFields(num_fields, fields, TAP_DRSHIFT, pause_state);
 624                 } else
 625                 {
 626                         /* Shift out a 0 for disabled tap's */
 627                         assert(tap->bypass);
 628                         shiftValueInner(TAP_DRSHIFT, pause_state, 1, 0);
 629                 }
 630         }
 631         return ERROR_OK;
 632 }
 633
 634 int interface_jtag_add_plain_dr_scan(int num_bits, const uint8_t *out_bits, uint8_t *in_bits, tap_state_t state)
 635 {
 636         scanBits(out_bits, in_bits, num_bits, true, TAP_DRSHIFT, state);
 637         return ERROR_OK;
 638 }
 639
 640 int interface_jtag_add_tlr()
 641 {
 642         setCurrentState(TAP_RESET);
 643         return ERROR_OK;
 644 }
 645
 646
 647 int interface_jtag_add_reset(int req_trst, int req_srst)
 648 {
 649         zy1000_reset(req_trst, req_srst);
 650         return ERROR_OK;
 651 }
 652
 653 static int zy1000_jtag_add_clocks(int num_cycles, tap_state_t state, tap_state_t clockstate)
 654 {
 655         /* num_cycles can be 0 */
 656         setCurrentState(clockstate);
 657
 658         /* execute num_cycles, 32 at the time. */
 659         int i;
 660         for (i = 0; i < num_cycles; i += 32)
 661         {
 662                 int num;
 663                 num = 32;
 664                 if (num_cycles-i < num)
 665                 {
 666                         num = num_cycles-i;
 667                 }
 668                 shiftValueInner(clockstate, clockstate, num, 0);
 669         }
 670
 671 #if !TEST_MANUAL()
 672         /* finish in end_state */
 673         setCurrentState(state);
 674 #else
 675         tap_state_t t = TAP_IDLE;
 676         /* test manual drive code on any target */
 677         int tms;
 678         uint8_t tms_scan = tap_get_tms_path(t, state);
 679         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 680
 681         for (i = 0; i < tms_count; i++)
 682         {
 683                 tms = (tms_scan >> i) & 1;
 684                 waitIdle();
 685                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28,  tms);
 686         }
 687         waitIdle();
 688         ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, state);
 689 #endif
 690
 691         return ERROR_OK;
 692 }
 693
 694 int interface_jtag_add_runtest(int num_cycles, tap_state_t state)
 695 {
 696         return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE);
 697 }
 698
 699 int interface_jtag_add_clocks(int num_cycles)
 700 {
 701         return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_cur_state);
 702 }
 703
 704 int interface_add_tms_seq(unsigned num_bits, const uint8_t *seq, enum tap_state state)
 705 {
 706         /*wait for the fifo to be empty*/
 707         waitIdle();
 708
 709         for (unsigned i = 0; i < num_bits; i++)
 710         {
 711                 int tms;
 712
 713                 if (((seq[i/8] >> (i % 8)) & 1) == 0)
 714                 {
 715                         tms = 0;
 716                 }
 717                 else
 718                 {
 719                         tms = 1;
 720                 }
 721
 722                 waitIdle();
 723                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, tms);
 724         }
 725
 726         waitIdle();
 727         if (state != TAP_INVALID)
 728         {
 729                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, state);
 730         } else
 731         {
 732                 /* this would be normal if we are switching to SWD mode */
 733         }
 734         return ERROR_OK;
 735 }
 736
 737 int interface_jtag_add_pathmove(int num_states, const tap_state_t *path)
 738 {
 739         int state_count;
 740         int tms = 0;
 741
 742         state_count = 0;
 743
 744         tap_state_t cur_state = cmd_queue_cur_state;
 745
 746         uint8_t seq[16];
 747         memset(seq, 0, sizeof(seq));
 748         assert(num_states < (int)((sizeof(seq) * 8)));
 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                 seq[state_count/8] = seq[state_count/8] | (tms << (state_count % 8));
 767
 768                 cur_state = path[state_count];
 769                 state_count++;
 770                 num_states--;
 771         }
 772
 773         return interface_add_tms_seq(state_count, seq, cur_state);
 774 }
 775
 776 static void jtag_pre_post_bits(struct jtag_tap *tap, int *pre, int *post)
 777 {
 778         /* bypass bits before and after */
 779         int pre_bits = 0;
 780         int post_bits = 0;
 781
 782         bool found = false;
 783         struct jtag_tap *cur_tap, *nextTap;
 784         for (cur_tap = jtag_tap_next_enabled(NULL); cur_tap!= NULL; cur_tap = nextTap)
 785         {
 786                 nextTap = jtag_tap_next_enabled(cur_tap);
 787                 if (cur_tap == tap)
 788                 {
 789                         found = true;
 790                 } else
 791                 {
 792                         if (found)
 793                         {
 794                                 post_bits++;
 795                         } else
 796                         {
 797                                 pre_bits++;
 798                         }
 799                 }
 800         }
 801         *pre = pre_bits;
 802         *post = post_bits;
 803 }
 804
 805 /*
 806         static const int embeddedice_num_bits[] = {32, 6};
 807         uint32_t values[2];
 808
 809         values[0] = value;
 810         values[1] = (1 << 5) | reg_addr;
 811
 812         jtag_add_dr_out(tap,
 813                         2,
 814                         embeddedice_num_bits,
 815                         values,
 816                         TAP_IDLE);
 817 */
 818
 819 void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, int little, int count)
 820 {
 821 #if 0
 822         int i;
 823         for (i = 0; i < count; i++)
 824         {
 825                 embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 826                 buffer += 4;
 827         }
 828 #else
 829         int pre_bits;
 830         int post_bits;
 831         jtag_pre_post_bits(tap, &pre_bits, &post_bits);
 832
 833         if ((pre_bits > 32) || (post_bits + 6 > 32))
 834         {
 835                 int i;
 836                 for (i = 0; i < count; i++)
 837                 {
 838                         embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 839                         buffer += 4;
 840                 }
 841         } else
 842         {
 843                 int i;
 844                 for (i = 0; i < count; i++)
 845                 {
 846                         /* Fewer pokes means we get to use the FIFO more efficiently */
 847                         shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, pre_bits, 0);
 848                         shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, little));
 849                         /* Danger! here we need to exit into the TAP_IDLE state to make
 850                          * DCC pick up this value.
 851                          */
 852                         shiftValueInner(TAP_DRSHIFT, TAP_IDLE, 6 + post_bits, (reg_addr | (1 << 5)));
 853                         buffer += 4;
 854                 }
 855         }
 856 #endif
 857 }
 858
 859
 860
 861 int arm11_run_instr_data_to_core_noack_inner(struct jtag_tap * tap, uint32_t opcode, uint32_t * data, size_t count)
 862 {
 863         /* bypass bits before and after */
 864         int pre_bits;
 865         int post_bits;
 866         jtag_pre_post_bits(tap, &pre_bits, &post_bits);
 867         post_bits+=2;
 868
 869         if ((pre_bits > 32) || (post_bits > 32))
 870         {
 871                 int arm11_run_instr_data_to_core_noack_inner_default(struct jtag_tap *, uint32_t, uint32_t *, size_t);
 872                 return arm11_run_instr_data_to_core_noack_inner_default(tap, opcode, data, count);
 873         } else
 874         {
 875                 static const int bits[] = {32, 2};
 876                 uint32_t values[] = {0, 0};
 877
 878                 /* FIX!!!!!! the target_write_memory() API started this nasty problem
 879                  * with unaligned uint32_t * pointers... */
 880                 const uint8_t *t = (const uint8_t *)data;
 881
 882                 while (--count > 0)
 883                 {
 884 #if 1
 885                         /* Danger! This code doesn't update cmd_queue_cur_state, so
 886                          * invoking jtag_add_pathmove() before jtag_add_dr_out() after
 887                          * this loop would fail!
 888                          */
 889                         shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, pre_bits, 0);
 890
 891                         uint32_t value;
 892                         value = *t++;
 893                         value |= (*t++<<8);
 894                         value |= (*t++<<16);
 895                         value |= (*t++<<24);
 896
 897                         shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, value);
 898                         /* minimum 2 bits */
 899                         shiftValueInner(TAP_DRSHIFT, TAP_DRPAUSE, post_bits, 0);
 900
 901                         /* copy & paste from arm11_dbgtap.c */
 902                         //TAP_DREXIT2, TAP_DRUPDATE, TAP_IDLE, TAP_IDLE, TAP_IDLE, TAP_DRSELECT, TAP_DRCAPTURE, TAP_DRSHIFT
 903                         /* KLUDGE! we have to flush the fifo or the Nios CPU locks up.
 904                          * This is probably a bug in the Avalon bus(cross clocking bridge?)
 905                          * or in the jtag registers module.
 906                          */
 907                         waitIdle();
 908                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 1);
 909                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 1);
 910                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
 911                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
 912                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
 913                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 1);
 914                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
 915                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
 916                         /* we don't have to wait for the queue to empty here */
 917                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_DRSHIFT);
 918                         waitIdle();
 919 #else
 920                         static const tap_state_t arm11_MOVE_DRPAUSE_IDLE_DRPAUSE_with_delay[] =
 921                         {
 922                                 TAP_DREXIT2, TAP_DRUPDATE, TAP_IDLE, TAP_IDLE, TAP_IDLE, TAP_DRSELECT, TAP_DRCAPTURE, TAP_DRSHIFT
 923                         };
 924
 925                         values[0] = *t++;
 926                         values[0] |= (*t++<<8);
 927                         values[0] |= (*t++<<16);
 928                         values[0] |= (*t++<<24);
 929
 930                         jtag_add_dr_out(tap,
 931                                 2,
 932                                 bits,
 933                                 values,
 934                                 TAP_IDLE);
 935
 936                         jtag_add_pathmove(ARRAY_SIZE(arm11_MOVE_DRPAUSE_IDLE_DRPAUSE_with_delay),
 937                                 arm11_MOVE_DRPAUSE_IDLE_DRPAUSE_with_delay);
 938 #endif
 939                 }
 940
 941                 values[0] = *t++;
 942                 values[0] |= (*t++<<8);
 943                 values[0] |= (*t++<<16);
 944                 values[0] |= (*t++<<24);
 945
 946                 /* This will happen on the last iteration updating cmd_queue_cur_state
 947                  * so we don't have to track it during the common code path
 948                  */
 949                 jtag_add_dr_out(tap,
 950                         2,
 951                         bits,
 952                         values,
 953                         TAP_IDLE);
 954
 955                 return jtag_execute_queue();
 956         }
 957 }
 958
 959
 960 static const struct command_registration zy1000_commands[] = {
 961         {
 962                 .name = "power",
 963                 .handler = handle_power_command,
 964                 .mode = COMMAND_ANY,
 965                 .help = "Turn power switch to target on/off. "
 966                         "With no arguments, prints status.",
 967                 .usage = "('on'|'off)",
 968         },
 969 #if BUILD_ECOSBOARD
 970         {
 971                 .name = "zy1000_version",
 972                 .mode = COMMAND_ANY,
 973                 .jim_handler = jim_zy1000_version,
 974                 .help = "Print version info for zy1000.",
 975                 .usage = "['openocd'|'zy1000'|'date'|'time'|'pcb'|'fpga']",
 976         },
 977 #else
 978         {
 979                 .name = "zy1000_server",
 980                 .mode = COMMAND_ANY,
 981                 .jim_handler = jim_zy1000_server,
 982                 .help = "Tcpip address for ZY1000 server.",
 983                 .usage = "address",
 984         },
 985 #endif
 986         {
 987                 .name = "powerstatus",
 988                 .mode = COMMAND_ANY,
 989                 .jim_handler = zylinjtag_Jim_Command_powerstatus,
 990                 .help = "Returns power status of target",
 991         },
 992 #ifdef CYGPKG_HAL_NIOS2
 993         {
 994                 .name = "updatezy1000firmware",
 995                 .mode = COMMAND_ANY,
 996                 .jim_handler = jim_zy1000_writefirmware,
 997                 .help = "writes firmware to flash",
 998                 /* .usage = "some_string", */
 999         },
1000 #endif
1001         COMMAND_REGISTRATION_DONE
1002 };
1003
1004
1005 static int tcp_ip = -1;
1006
1007 /* Write large packets if we can */
1008 static size_t out_pos;
1009 static uint8_t out_buffer[16384];
1010 static size_t in_pos;
1011 static size_t in_write;
1012 static uint8_t in_buffer[16384];
1013
1014 static bool flush_writes(void)
1015 {
1016         bool ok = (write(tcp_ip, out_buffer, out_pos) == (int)out_pos);
1017         out_pos = 0;
1018         return ok;
1019 }
1020
1021 static bool writeLong(uint32_t l)
1022 {
1023         int i;
1024         for (i = 0; i < 4; i++)
1025         {
1026                 uint8_t c = (l >> (i*8))&0xff;
1027                 out_buffer[out_pos++] = c;
1028                 if (out_pos >= sizeof(out_buffer))
1029                 {
1030                         if (!flush_writes())
1031                         {
1032                                 return false;
1033                         }
1034                 }
1035         }
1036         return true;
1037 }
1038
1039 static bool readLong(uint32_t *out_data)
1040 {
1041         if (out_pos > 0)
1042         {
1043                 if (!flush_writes())
1044                 {
1045                         return false;
1046                 }
1047         }
1048
1049         uint32_t data = 0;
1050         int i;
1051         for (i = 0; i < 4; i++)
1052         {
1053                 uint8_t c;
1054                 if (in_pos == in_write)
1055                 {
1056                         /* read more */
1057                         int t;
1058                         t = read(tcp_ip, in_buffer, sizeof(in_buffer));
1059                         if (t < 1)
1060                         {
1061                                 return false;
1062                         }
1063                         in_write = (size_t) t;
1064                         in_pos = 0;
1065                 }
1066                 c = in_buffer[in_pos++];
1067
1068                 data |= (c << (i*8));
1069         }
1070         *out_data = data;
1071         return true;
1072 }
1073
1074 enum ZY1000_CMD
1075 {
1076         ZY1000_CMD_POKE = 0x0,
1077         ZY1000_CMD_PEEK = 0x8,
1078         ZY1000_CMD_SLEEP = 0x1,
1079         ZY1000_CMD_WAITIDLE = 2
1080 };
1081
1082
1083 #if !BUILD_ECOSBOARD
1084
1085 #include <sys/socket.h> /* for socket(), connect(), send(), and recv() */
1086 #include <arpa/inet.h>  /* for sockaddr_in and inet_addr() */
1087
1088 /* We initialize this late since we need to know the server address
1089  * first.
1090  */
1091 static void tcpip_open(void)
1092 {
1093         if (tcp_ip >= 0)
1094                 return;
1095
1096         struct sockaddr_in echoServAddr; /* Echo server address */
1097
1098         /* Create a reliable, stream socket using TCP */
1099         if ((tcp_ip = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
1100         {
1101                 fprintf(stderr, "Failed to connect to zy1000 server\n");
1102                 exit(-1);
1103         }
1104
1105         /* Construct the server address structure */
1106         memset(&echoServAddr, 0, sizeof(echoServAddr)); /* Zero out structure */
1107         echoServAddr.sin_family = AF_INET; /* Internet address family */
1108         echoServAddr.sin_addr.s_addr = inet_addr(tcp_server); /* Server IP address */
1109         echoServAddr.sin_port = htons(7777); /* Server port */
1110
1111         /* Establish the connection to the echo server */
1112         if (connect(tcp_ip, (struct sockaddr *) &echoServAddr, sizeof(echoServAddr)) < 0)
1113         {
1114                 fprintf(stderr, "Failed to connect to zy1000 server\n");
1115                 exit(-1);
1116         }
1117
1118         int flag = 1;
1119         setsockopt(tcp_ip,      /* socket affected */
1120                         IPPROTO_TCP,            /* set option at TCP level */
1121                         TCP_NODELAY,            /* name of option */
1122                         (char *)&flag,          /* the cast is historical cruft */
1123                         sizeof(int));           /* length of option value */
1124
1125 }
1126
1127
1128 /* send a poke */
1129 void zy1000_tcpout(uint32_t address, uint32_t data)
1130 {
1131         tcpip_open();
1132         if (!writeLong((ZY1000_CMD_POKE << 24) | address)||
1133                         !writeLong(data))
1134         {
1135                 fprintf(stderr, "Could not write to zy1000 server\n");
1136                 exit(-1);
1137         }
1138 }
1139
1140 /* By sending the wait to the server, we avoid a readback
1141  * of status. Radically improves performance for this operation
1142  * with long ping times.
1143  */
1144 void waitIdle(void)
1145 {
1146         tcpip_open();
1147         if (!writeLong((ZY1000_CMD_WAITIDLE << 24)))
1148         {
1149                 fprintf(stderr, "Could not write to zy1000 server\n");
1150                 exit(-1);
1151         }
1152 }
1153
1154 uint32_t zy1000_tcpin(uint32_t address)
1155 {
1156         tcpip_open();
1157
1158         zy1000_flush_readqueue();
1159
1160         uint32_t data;
1161         if (!writeLong((ZY1000_CMD_PEEK << 24) | address)||
1162                         !readLong(&data))
1163         {
1164                 fprintf(stderr, "Could not read from zy1000 server\n");
1165                 exit(-1);
1166         }
1167         return data;
1168 }
1169
1170 int interface_jtag_add_sleep(uint32_t us)
1171 {
1172         tcpip_open();
1173         if (!writeLong((ZY1000_CMD_SLEEP << 24))||
1174                         !writeLong(us))
1175         {
1176                 fprintf(stderr, "Could not read from zy1000 server\n");
1177                 exit(-1);
1178         }
1179         return ERROR_OK;
1180 }
1181
1182 /* queue a readback */
1183 #define readqueue_size 16384
1184 static struct
1185 {
1186         uint8_t *dest;
1187         int bits;
1188 } readqueue[readqueue_size];
1189
1190 static int readqueue_pos = 0;
1191
1192 /* flush the readqueue, this means reading any data that
1193  * we're expecting and store them into the final position
1194  */
1195 void zy1000_flush_readqueue(void)
1196 {
1197         if (readqueue_pos == 0)
1198         {
1199                 /* simply debugging by allowing easy breakpoints when there
1200                  * is something to do. */
1201                 return;
1202         }
1203         int i;
1204         tcpip_open();
1205         for (i = 0; i < readqueue_pos; i++)
1206         {
1207                 uint32_t value;
1208                 if (!readLong(&value))
1209                 {
1210                         fprintf(stderr, "Could not read from zy1000 server\n");
1211                         exit(-1);
1212                 }
1213
1214                 uint8_t *in_value = readqueue[i].dest;
1215                 int k = readqueue[i].bits;
1216
1217                 // we're shifting in data to MSB, shift data to be aligned for returning the value
1218                 value >>= 32-k;
1219
1220                 for (int l = 0; l < k; l += 8)
1221                 {
1222                         in_value[l/8]=(value >> l)&0xff;
1223                 }
1224         }
1225         readqueue_pos = 0;
1226 }
1227
1228 /* By queuing the callback's we avoid flushing the
1229 read queue until jtag_execute_queue(). This can
1230 reduce latency dramatically for cases where
1231 callbacks are used extensively.
1232 */
1233 #define callbackqueue_size 128
1234 static struct callbackentry
1235 {
1236         jtag_callback_t callback;
1237         jtag_callback_data_t data0;
1238         jtag_callback_data_t data1;
1239         jtag_callback_data_t data2;
1240         jtag_callback_data_t data3;
1241 } callbackqueue[callbackqueue_size];
1242
1243 static int callbackqueue_pos = 0;
1244
1245 void zy1000_jtag_add_callback4(jtag_callback_t callback, jtag_callback_data_t data0, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3)
1246 {
1247         if (callbackqueue_pos >= callbackqueue_size)
1248         {
1249                 zy1000_flush_callbackqueue();
1250         }
1251
1252         callbackqueue[callbackqueue_pos].callback = callback;
1253         callbackqueue[callbackqueue_pos].data0 = data0;
1254         callbackqueue[callbackqueue_pos].data1 = data1;
1255         callbackqueue[callbackqueue_pos].data2 = data2;
1256         callbackqueue[callbackqueue_pos].data3 = data3;
1257         callbackqueue_pos++;
1258 }
1259
1260 static int zy1000_jtag_convert_to_callback4(jtag_callback_data_t data0, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3)
1261 {
1262         ((jtag_callback1_t)data1)(data0);
1263         return ERROR_OK;
1264 }
1265
1266 void zy1000_jtag_add_callback(jtag_callback1_t callback, jtag_callback_data_t data0)
1267 {
1268         zy1000_jtag_add_callback4(zy1000_jtag_convert_to_callback4, data0, (jtag_callback_data_t)callback, 0, 0);
1269 }
1270
1271 void zy1000_flush_callbackqueue(void)
1272 {
1273         /* we have to flush the read queue so we have access to
1274          the data the callbacks will use
1275         */
1276         zy1000_flush_readqueue();
1277         int i;
1278         for (i = 0; i < callbackqueue_pos; i++)
1279         {
1280                 struct callbackentry *entry = &callbackqueue[i];
1281                 jtag_set_error(entry->callback(entry->data0, entry->data1, entry->data2, entry->data3));
1282         }
1283         callbackqueue_pos = 0;
1284 }
1285
1286 static void writeShiftValue(uint8_t *data, int bits)
1287 {
1288         waitIdle();
1289
1290         if (!writeLong((ZY1000_CMD_PEEK << 24) | (ZY1000_JTAG_BASE + 0xc)))
1291         {
1292                 fprintf(stderr, "Could not read from zy1000 server\n");
1293                 exit(-1);
1294         }
1295
1296         if (readqueue_pos >= readqueue_size)
1297         {
1298                 zy1000_flush_readqueue();
1299         }
1300
1301         readqueue[readqueue_pos].dest = data;
1302         readqueue[readqueue_pos].bits = bits;
1303         readqueue_pos++;
1304 }
1305
1306 #else
1307
1308 static void writeShiftValue(uint8_t *data, int bits)
1309 {
1310         uint32_t value;
1311         waitIdle();
1312         ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, value);
1313         VERBOSE(LOG_INFO("getShiftValue %08x", value));
1314
1315         // data in, LSB to MSB
1316         // we're shifting in data to MSB, shift data to be aligned for returning the value
1317         value >>= 32 - bits;
1318
1319         for (int l = 0; l < bits; l += 8)
1320         {
1321                 data[l/8]=(value >> l)&0xff;
1322         }
1323 }
1324
1325 #endif
1326
1327 #if BUILD_ECOSBOARD
1328 static char tcpip_stack[2048];
1329 static cyg_thread tcpip_thread_object;
1330 static cyg_handle_t tcpip_thread_handle;
1331
1332 static char watchdog_stack[2048];
1333 static cyg_thread watchdog_thread_object;
1334 static cyg_handle_t watchdog_thread_handle;
1335
1336 /* Infinite loop peeking & poking */
1337 static void tcpipserver(void)
1338 {
1339         for (;;)
1340         {
1341                 uint32_t address;
1342                 if (!readLong(&address))
1343                         return;
1344                 enum ZY1000_CMD c = (address >> 24) & 0xff;
1345                 address &= 0xffffff;
1346                 switch (c)
1347                 {
1348                         case ZY1000_CMD_POKE:
1349                         {
1350                                 uint32_t data;
1351                                 if (!readLong(&data))
1352                                         return;
1353                                 address &= ~0x80000000;
1354                                 ZY1000_POKE(address + ZY1000_JTAG_BASE, data);
1355                                 break;
1356                         }
1357                         case ZY1000_CMD_PEEK:
1358                         {
1359                                 uint32_t data;
1360                                 ZY1000_PEEK(address + ZY1000_JTAG_BASE, data);
1361                                 if (!writeLong(data))
1362                                         return;
1363                                 break;
1364                         }
1365                         case ZY1000_CMD_SLEEP:
1366                         {
1367                                 uint32_t data;
1368                                 if (!readLong(&data))
1369                                         return;
1370                                 jtag_sleep(data);
1371                                 break;
1372                         }
1373                         case ZY1000_CMD_WAITIDLE:
1374                         {
1375                                 waitIdle();
1376                                 break;
1377                         }
1378                         default:
1379                                 return;
1380                 }
1381         }
1382 }
1383
1384
1385 static void tcpip_server(cyg_addrword_t data)
1386 {
1387         int so_reuseaddr_option = 1;
1388
1389         int fd;
1390         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
1391         {
1392                 LOG_ERROR("error creating socket: %s", strerror(errno));
1393                 exit(-1);
1394         }
1395
1396         setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*) &so_reuseaddr_option,
1397                         sizeof(int));
1398
1399         struct sockaddr_in sin;
1400         unsigned int address_size;
1401         address_size = sizeof(sin);
1402         memset(&sin, 0, sizeof(sin));
1403         sin.sin_family = AF_INET;
1404         sin.sin_addr.s_addr = INADDR_ANY;
1405         sin.sin_port = htons(7777);
1406
1407         if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) == -1)
1408         {
1409                 LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
1410                 exit(-1);
1411         }
1412
1413         if (listen(fd, 1) == -1)
1414         {
1415                 LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
1416                 exit(-1);
1417         }
1418
1419
1420         for (;;)
1421         {
1422                 tcp_ip = accept(fd, (struct sockaddr *) &sin, &address_size);
1423                 if (tcp_ip < 0)
1424                 {
1425                         continue;
1426                 }
1427
1428                 int flag = 1;
1429                 setsockopt(tcp_ip,      /* socket affected */
1430                                 IPPROTO_TCP,            /* set option at TCP level */
1431                                 TCP_NODELAY,            /* name of option */
1432                                 (char *)&flag,          /* the cast is historical cruft */
1433                                 sizeof(int));           /* length of option value */
1434
1435                 bool save_poll = jtag_poll_get_enabled();
1436
1437                 /* polling will screw up the "connection" */
1438                 jtag_poll_set_enabled(false);
1439
1440                 tcpipserver();
1441
1442                 jtag_poll_set_enabled(save_poll);
1443
1444                 close(tcp_ip);
1445
1446         }
1447         close(fd);
1448
1449 }
1450
1451 #ifdef WATCHDOG_BASE
1452 /* If we connect to port 8888 we must send a char every 10s or the board resets itself */
1453 static void watchdog_server(cyg_addrword_t data)
1454 {
1455         int so_reuseaddr_option = 1;
1456
1457         int fd;
1458         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
1459         {
1460                 LOG_ERROR("error creating socket: %s", strerror(errno));
1461                 exit(-1);
1462         }
1463
1464         setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*) &so_reuseaddr_option,
1465                         sizeof(int));
1466
1467         struct sockaddr_in sin;
1468         unsigned int address_size;
1469         address_size = sizeof(sin);
1470         memset(&sin, 0, sizeof(sin));
1471         sin.sin_family = AF_INET;
1472         sin.sin_addr.s_addr = INADDR_ANY;
1473         sin.sin_port = htons(8888);
1474
1475         if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) == -1)
1476         {
1477                 LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
1478                 exit(-1);
1479         }
1480
1481         if (listen(fd, 1) == -1)
1482         {
1483                 LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
1484                 exit(-1);
1485         }
1486
1487
1488         for (;;)
1489         {
1490                 int watchdog_ip = accept(fd, (struct sockaddr *) &sin, &address_size);
1491
1492                 /* Start watchdog, must be reset every 10 seconds. */
1493                 HAL_WRITE_UINT32(WATCHDOG_BASE + 4, 4);
1494
1495                 if (watchdog_ip < 0)
1496                 {
1497                         LOG_ERROR("couldn't open watchdog socket: %s", strerror(errno));
1498                         exit(-1);
1499                 }
1500
1501                 int flag = 1;
1502                 setsockopt(watchdog_ip, /* socket affected */
1503                                 IPPROTO_TCP,            /* set option at TCP level */
1504                                 TCP_NODELAY,            /* name of option */
1505                                 (char *)&flag,          /* the cast is historical cruft */
1506                                 sizeof(int));           /* length of option value */
1507
1508
1509                 char buf;
1510                 for (;;)
1511                 {
1512                         if (read(watchdog_ip, &buf, 1) == 1)
1513                         {
1514                                 /* Reset timer */
1515                                 HAL_WRITE_UINT32(WATCHDOG_BASE + 8, 0x1234);
1516                                 /* Echo so we can telnet in and see that resetting works */
1517                                 write(watchdog_ip, &buf, 1);
1518                         } else
1519                         {
1520                                 /* Stop tickling the watchdog, the CPU will reset in < 10 seconds
1521                                  * now.
1522                                  */
1523                                 return;
1524                         }
1525
1526                 }
1527
1528                 /* Never reached */
1529         }
1530 }
1531 #endif
1532
1533 int interface_jtag_add_sleep(uint32_t us)
1534 {
1535         jtag_sleep(us);
1536         return ERROR_OK;
1537 }
1538
1539 #endif
1540
1541
1542 int zy1000_init(void)
1543 {
1544 #if BUILD_ECOSBOARD
1545         LOG_USER("%s", ZYLIN_OPENOCD_VERSION);
1546 #endif
1547
1548         ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x30); // Turn on LED1 & LED2
1549
1550         setPower(true); // on by default
1551
1552
1553          /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
1554         zy1000_reset(0, 0);
1555         zy1000_speed(jtag_get_speed());
1556
1557
1558 #if BUILD_ECOSBOARD
1559         cyg_thread_create(1, tcpip_server, (cyg_addrword_t) 0, "tcip/ip server",
1560                         (void *) tcpip_stack, sizeof(tcpip_stack),
1561                         &tcpip_thread_handle, &tcpip_thread_object);
1562         cyg_thread_resume(tcpip_thread_handle);
1563 #ifdef WATCHDOG_BASE
1564         cyg_thread_create(1, watchdog_server, (cyg_addrword_t) 0, "watchdog tcip/ip server",
1565                         (void *) watchdog_stack, sizeof(watchdog_stack),
1566                         &watchdog_thread_handle, &watchdog_thread_object);
1567         cyg_thread_resume(watchdog_thread_handle);
1568 #endif
1569 #endif
1570
1571         return ERROR_OK;
1572 }
1573
1574
1575
1576 struct jtag_interface zy1000_interface =
1577 {
1578         .name = "ZY1000",
1579         .supported = DEBUG_CAP_TMS_SEQ,
1580         .execute_queue = NULL,
1581         .speed = zy1000_speed,
1582         .commands = zy1000_commands,
1583         .init = zy1000_init,
1584         .quit = zy1000_quit,
1585         .khz = zy1000_khz,
1586         .speed_div = zy1000_speed_div,
1587         .power_dropout = zy1000_power_dropout,
1588         .srst_asserted = zy1000_srst_asserted,
1589 };