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   1 /***************************************************************************
   2  *   Copyright (C) 2004, 2006 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #if IS_CYGWIN == 1
  25 #include "windows.h"
  26 #undef ERROR
  27 #endif
  28
  29 #include "replacements.h"
  30
  31 /* project specific includes */
  32 #include "log.h"
  33 #include "types.h"
  34 #include "jtag.h"
  35 #include "configuration.h"
  36 #include "time_support.h"
  37
  38 /* system includes */
  39 #include <string.h>
  40 #include <stdlib.h>
  41 #include <unistd.h>
  42
  43 /* FT2232 access library includes */
  44 #if BUILD_FT2232_FTD2XX == 1
  45 #include <ftd2xx.h>
  46 #elif BUILD_FT2232_LIBFTDI == 1
  47 #include <ftdi.h>
  48 #endif
  49
  50 #include <sys/time.h>
  51 #include <time.h>
  52
  53 /* enable this to debug io latency
  54  */
  55 #if 0
  56 #define _DEBUG_USB_IO_
  57 #endif
  58
  59 /* enable this to debug communication
  60  */
  61 #if 0
  62 #define _DEBUG_USB_COMMS_
  63 #endif
  64
  65 int ft2232_execute_queue(void);
  66
  67 int ft2232_speed(int speed);
  68 int ft2232_register_commands(struct command_context_s *cmd_ctx);
  69 int ft2232_init(void);
  70 int ft2232_quit(void);
  71
  72 int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  73 int ft2232_handle_serial_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  74 int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  75 int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  76
  77 char *ft2232_device_desc = NULL;
  78 char *ft2232_serial = NULL;
  79 char *ft2232_layout = NULL;
  80
  81 #define MAX_USB_IDS     8
  82 /* vid = pid = 0 marks the end of the list */
  83 static u16 ft2232_vid[MAX_USB_IDS+1] = { 0x0403, 0 };
  84 static u16 ft2232_pid[MAX_USB_IDS+1] = { 0x6010, 0 };
  85
  86 typedef struct ft2232_layout_s
  87 {
  88         char* name;
  89         int(*init)(void);
  90         void(*reset)(int trst, int srst);
  91         void(*blink)(void);
  92 } ft2232_layout_t;
  93
  94 /* init procedures for supported layouts */
  95 int usbjtag_init(void);
  96 int jtagkey_init(void);
  97 int olimex_jtag_init(void);
  98 int flyswatter_init(void);
  99 int turtle_init(void);
 100 int comstick_init(void);
 101
 102 /* reset procedures for supported layouts */
 103 void usbjtag_reset(int trst, int srst);
 104 void jtagkey_reset(int trst, int srst);
 105 void olimex_jtag_reset(int trst, int srst);
 106 void flyswatter_reset(int trst, int srst);
 107 void turtle_reset(int trst, int srst);
 108 void comstick_reset(int trst, int srst);
 109
 110 /* blink procedures for layouts that support a blinking led */
 111 void olimex_jtag_blink(void);
 112 void turtle_jtag_blink(void);
 113
 114 ft2232_layout_t ft2232_layouts[] =
 115 {
 116         {"usbjtag", usbjtag_init, usbjtag_reset, NULL},
 117         {"jtagkey", jtagkey_init, jtagkey_reset, NULL},
 118         {"jtagkey_prototype_v1", jtagkey_init, jtagkey_reset, NULL},
 119         {"oocdlink", jtagkey_init, jtagkey_reset, NULL},
 120         {"signalyzer", usbjtag_init, usbjtag_reset, NULL},
 121         {"evb_lm3s811", usbjtag_init, usbjtag_reset, NULL},
 122         {"olimex-jtag", olimex_jtag_init, olimex_jtag_reset, olimex_jtag_blink},
 123         {"flyswatter", flyswatter_init, flyswatter_reset, NULL},
 124         {"turtelizer2", turtle_init, turtle_reset, turtle_jtag_blink},
 125         {"comstick", comstick_init, comstick_reset, NULL},
 126         {NULL, NULL, NULL},
 127 };
 128
 129 static u8 nTRST, nTRSTnOE, nSRST, nSRSTnOE;
 130
 131 static ft2232_layout_t *layout;
 132 static u8 low_output = 0x0;
 133 static u8 low_direction = 0x0;
 134 static u8 high_output = 0x0;
 135 static u8 high_direction = 0x0;
 136
 137 #if BUILD_FT2232_FTD2XX == 1
 138 static FT_HANDLE ftdih = NULL;
 139 #elif BUILD_FT2232_LIBFTDI == 1
 140 static struct ftdi_context ftdic;
 141 #endif
 142
 143 static u8 *ft2232_buffer = NULL;
 144 static int ft2232_buffer_size = 0;
 145 static int ft2232_read_pointer = 0;
 146 static int ft2232_expect_read = 0;
 147 #define FT2232_BUFFER_SIZE      131072
 148 #define BUFFER_ADD ft2232_buffer[ft2232_buffer_size++]
 149 #define BUFFER_READ ft2232_buffer[ft2232_read_pointer++]
 150
 151 jtag_interface_t ft2232_interface =
 152 {
 153
 154         .name = "ft2232",
 155
 156         .execute_queue = ft2232_execute_queue,
 157
 158         .support_pathmove = 1,
 159
 160         .speed = ft2232_speed,
 161         .register_commands = ft2232_register_commands,
 162         .init = ft2232_init,
 163         .quit = ft2232_quit,
 164 };
 165
 166 int ft2232_write(u8 *buf, int size, u32* bytes_written)
 167 {
 168 #if BUILD_FT2232_FTD2XX == 1
 169         FT_STATUS status;
 170         DWORD dw_bytes_written;
 171         if ((status = FT_Write(ftdih, buf, size, &dw_bytes_written)) != FT_OK)
 172         {
 173                 *bytes_written = dw_bytes_written;
 174                 ERROR("FT_Write returned: %lu", status);
 175                 return ERROR_JTAG_DEVICE_ERROR;
 176         }
 177         else
 178         {
 179                 *bytes_written = dw_bytes_written;
 180                 return ERROR_OK;
 181         }
 182 #elif BUILD_FT2232_LIBFTDI == 1
 183         int retval;
 184         if ((retval = ftdi_write_data(&ftdic, buf, size)) < 0)
 185         {
 186                 *bytes_written = 0;
 187                 ERROR("ftdi_write_data: %s", ftdi_get_error_string(&ftdic));
 188                 return ERROR_JTAG_DEVICE_ERROR;
 189         }
 190         else
 191         {
 192                 *bytes_written = retval;
 193                 return ERROR_OK;
 194         }
 195 #endif
 196 }
 197
 198 int ft2232_read(u8* buf, int size, u32* bytes_read)
 199 {
 200 #if BUILD_FT2232_FTD2XX == 1
 201         DWORD dw_bytes_read;
 202         FT_STATUS status;
 203         int timeout = 5;
 204         *bytes_read = 0;
 205
 206         while ((*bytes_read < size) && timeout--)
 207         {
 208                 if ((status = FT_Read(ftdih, buf + *bytes_read, size -
 209                         *bytes_read, &dw_bytes_read)) != FT_OK)
 210                 {
 211                         *bytes_read = 0;
 212                         ERROR("FT_Read returned: %lu", status);
 213                         return ERROR_JTAG_DEVICE_ERROR;
 214                 }
 215                 *bytes_read += dw_bytes_read;
 216         }
 217 #elif BUILD_FT2232_LIBFTDI == 1
 218         int retval;
 219         int timeout = 100;
 220         *bytes_read = 0;
 221
 222         while ((*bytes_read < size) && timeout--)
 223         {
 224                 if ((retval = ftdi_read_data(&ftdic, buf + *bytes_read, size - *bytes_read)) < 0)
 225                 {
 226                         *bytes_read = 0;
 227                         ERROR("ftdi_read_data: %s", ftdi_get_error_string(&ftdic));
 228                         return ERROR_JTAG_DEVICE_ERROR;
 229                 }
 230                 *bytes_read += retval;
 231         }
 232 #endif
 233
 234         if (*bytes_read < size)
 235         {
 236                 ERROR("couldn't read the requested number of bytes from FT2232 device (%i < %i)", *bytes_read, size);
 237                 return ERROR_JTAG_DEVICE_ERROR;
 238         }
 239
 240         return ERROR_OK;
 241 }
 242
 243 int ft2232_speed(int speed)
 244 {
 245         u8 buf[3];
 246         int retval;
 247         u32 bytes_written;
 248
 249         buf[0] = 0x86; /* command "set divisor" */
 250         buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=1.5MHz, ...*/
 251         buf[2] = (speed >> 8) & 0xff; /* valueH */
 252
 253         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
 254         if (((retval = ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
 255         {
 256                 ERROR("couldn't set FT2232 TCK speed");
 257                 return retval;
 258         }
 259
 260         jtag_speed = speed;
 261
 262         return ERROR_OK;
 263 }
 264
 265 int ft2232_register_commands(struct command_context_s *cmd_ctx)
 266 {
 267         register_command(cmd_ctx, NULL, "ft2232_device_desc", ft2232_handle_device_desc_command,
 268                 COMMAND_CONFIG, NULL);
 269         register_command(cmd_ctx, NULL, "ft2232_serial", ft2232_handle_serial_command,
 270                 COMMAND_CONFIG, NULL);
 271         register_command(cmd_ctx, NULL, "ft2232_layout", ft2232_handle_layout_command,
 272                 COMMAND_CONFIG, NULL);
 273         register_command(cmd_ctx, NULL, "ft2232_vid_pid", ft2232_handle_vid_pid_command,
 274                                          COMMAND_CONFIG, NULL);
 275         return ERROR_OK;
 276 }
 277
 278 void ft2232_end_state(enum tap_state state)
 279 {
 280         if (tap_move_map[state] != -1)
 281                 end_state = state;
 282         else
 283         {
 284                 ERROR("BUG: %i is not a valid end state", state);
 285                 exit(-1);
 286         }
 287 }
 288
 289 void ft2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
 290 {
 291         int num_bytes = ((scan_size + 7) / 8);
 292         int bits_left = scan_size;
 293         int cur_byte = 0;
 294
 295         while(num_bytes-- > 1)
 296         {
 297                 buffer[cur_byte] = BUFFER_READ;
 298                 cur_byte++;
 299                 bits_left -= 8;
 300         }
 301
 302         buffer[cur_byte] = 0x0;
 303
 304         if (bits_left > 1)
 305         {
 306                 buffer[cur_byte] = BUFFER_READ >> 1;
 307         }
 308
 309         buffer[cur_byte] = (buffer[cur_byte] | ((BUFFER_READ & 0x02) << 6)) >> (8 - bits_left);
 310
 311 }
 312
 313 void ft2232_debug_dump_buffer(void)
 314 {
 315         int i;
 316         char line[256];
 317         char *line_p = line;
 318
 319         for (i = 0; i < ft2232_buffer_size; i++)
 320         {
 321                 line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ft2232_buffer[i]);
 322                 if (i % 16 == 15)
 323                 {
 324                         DEBUG("%s", line);
 325                         line_p = line;
 326                 }
 327         }
 328
 329         if (line_p != line)
 330                 DEBUG("%s", line);
 331 }
 332
 333 int ft2232_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 334 {
 335         jtag_command_t *cmd;
 336         u8 *buffer;
 337         int scan_size;
 338         enum scan_type type;
 339         int retval;
 340         u32 bytes_written;
 341         u32 bytes_read;
 342
 343 #ifdef _DEBUG_USB_IO_
 344         struct timeval start, inter, inter2, end;
 345         struct timeval d_inter, d_inter2, d_end;
 346 #endif
 347
 348 #ifdef _DEBUG_USB_COMMS_
 349         DEBUG("write buffer (size %i):", ft2232_buffer_size);
 350         ft2232_debug_dump_buffer();
 351 #endif
 352
 353 #ifdef _DEBUG_USB_IO_
 354         gettimeofday(&start, NULL);
 355 #endif
 356
 357         if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 358         {
 359                 ERROR("couldn't write MPSSE commands to FT2232");
 360                 exit(-1);
 361         }
 362
 363 #ifdef _DEBUG_USB_IO_
 364         gettimeofday(&inter, NULL);
 365 #endif
 366
 367         if (ft2232_expect_read)
 368         {
 369                 int timeout = 100;
 370                 ft2232_buffer_size = 0;
 371
 372 #ifdef _DEBUG_USB_IO_
 373                 gettimeofday(&inter2, NULL);
 374 #endif
 375
 376                 if ((retval = ft2232_read(ft2232_buffer, ft2232_expect_read, &bytes_read)) != ERROR_OK)
 377                 {
 378                         ERROR("couldn't read from FT2232");
 379                         exit(-1);
 380                 }
 381
 382 #ifdef _DEBUG_USB_IO_
 383                 gettimeofday(&end, NULL);
 384
 385                 timeval_subtract(&d_inter, &inter, &start);
 386                 timeval_subtract(&d_inter2, &inter2, &start);
 387                 timeval_subtract(&d_end, &end, &start);
 388
 389                 INFO("inter: %i.%i, inter2: %i.%i end: %i.%i", d_inter.tv_sec, d_inter.tv_usec, d_inter2.tv_sec, d_inter2.tv_usec, d_end.tv_sec, d_end.tv_usec);
 390 #endif
 391
 392
 393                 ft2232_buffer_size = bytes_read;
 394
 395                 if (ft2232_expect_read != ft2232_buffer_size)
 396                 {
 397                         ERROR("ft2232_expect_read (%i) != ft2232_buffer_size (%i) (%i retries)", ft2232_expect_read, ft2232_buffer_size, 100 - timeout);
 398                         ft2232_debug_dump_buffer();
 399
 400                         exit(-1);
 401                 }
 402
 403 #ifdef _DEBUG_USB_COMMS_
 404                 DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ft2232_buffer_size);
 405                 ft2232_debug_dump_buffer();
 406 #endif
 407         }
 408
 409         ft2232_expect_read = 0;
 410         ft2232_read_pointer = 0;
 411
 412         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 413          * that wasn't handled by a caller-provided error handler
 414          */
 415         retval = ERROR_OK;
 416
 417         cmd = first;
 418         while (cmd != last)
 419         {
 420                 switch (cmd->type)
 421                 {
 422                         case JTAG_SCAN:
 423                                 type = jtag_scan_type(cmd->cmd.scan);
 424                                 if (type != SCAN_OUT)
 425                                 {
 426                                         scan_size = jtag_scan_size(cmd->cmd.scan);
 427                                         buffer = calloc(CEIL(scan_size, 8), 1);
 428                                         ft2232_read_scan(type, buffer, scan_size);
 429                                         if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 430                                                 retval = ERROR_JTAG_QUEUE_FAILED;
 431                                         free(buffer);
 432                                 }
 433                                 break;
 434                         default:
 435                                 break;
 436                 }
 437                 cmd = cmd->next;
 438         }
 439
 440         ft2232_buffer_size = 0;
 441
 442         return retval;
 443 }
 444
 445 void ft2232_add_pathmove(pathmove_command_t *cmd)
 446 {
 447         int num_states = cmd->num_states;
 448         u8 tms_byte;
 449         int state_count;
 450
 451         state_count = 0;
 452         while (num_states)
 453         {
 454                 tms_byte = 0x0;
 455                 int bit_count = 0;
 456
 457                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 458                 BUFFER_ADD = 0x4b;
 459                 /* number of states remaining */
 460                 BUFFER_ADD = (num_states % 7) - 1;
 461
 462                 while (num_states % 7)
 463                 {
 464                         if (tap_transitions[cur_state].low == cmd->path[state_count])
 465                                 buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
 466                         else if (tap_transitions[cur_state].high == cmd->path[state_count])
 467                                 buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
 468                         else
 469                         {
 470                                 ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[cmd->path[state_count]]);
 471                                 exit(-1);
 472                         }
 473
 474                         cur_state = cmd->path[state_count];
 475                         state_count++;
 476                         num_states--;
 477                 }
 478
 479                 BUFFER_ADD = tms_byte;
 480         }
 481
 482         end_state = cur_state;
 483 }
 484
 485 void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 486 {
 487         int num_bytes = (scan_size + 7) / 8;
 488         int bits_left = scan_size;
 489         int cur_byte = 0;
 490         int last_bit;
 491
 492         if (!((!ir_scan && (cur_state == TAP_SD)) || (ir_scan && (cur_state == TAP_SI))))
 493         {
 494                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 495                 BUFFER_ADD = 0x4b;
 496                 /* scan 7 bit */
 497                 BUFFER_ADD = 0x6;
 498                 /* TMS data bits */
 499                 if (ir_scan)
 500                 {
 501                         BUFFER_ADD = TAP_MOVE(cur_state, TAP_SI);
 502                         cur_state = TAP_SI;
 503                 }
 504                 else
 505                 {
 506                         BUFFER_ADD = TAP_MOVE(cur_state, TAP_SD);
 507                         cur_state = TAP_SD;
 508                 }
 509                 //DEBUG("added TMS scan (no read)");
 510         }
 511
 512         /* add command for complete bytes */
 513         while (num_bytes > 1)
 514         {
 515                 int thisrun_bytes;
 516                 if (type == SCAN_IO)
 517                 {
 518                         /* Clock Data Bytes In and Out LSB First */
 519                         BUFFER_ADD = 0x39;
 520                         //DEBUG("added TDI bytes (io %i)", num_bytes);
 521                 }
 522                 else if (type == SCAN_OUT)
 523                 {
 524                         /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
 525                         BUFFER_ADD = 0x19;
 526                         //DEBUG("added TDI bytes (o)");
 527                 }
 528                 else if (type == SCAN_IN)
 529                 {
 530                         /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
 531                         BUFFER_ADD = 0x28;
 532                         //DEBUG("added TDI bytes (i %i)", num_bytes);
 533                 }
 534                 thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
 535                 num_bytes -= thisrun_bytes;
 536                 BUFFER_ADD = (thisrun_bytes - 1) & 0xff;
 537                 BUFFER_ADD = ((thisrun_bytes - 1) >> 8) & 0xff;
 538                 if (type != SCAN_IN)
 539                 {
 540                         /* add complete bytes */
 541                         while(thisrun_bytes-- > 0)
 542                         {
 543                                 BUFFER_ADD = buffer[cur_byte];
 544                                 cur_byte++;
 545                                 bits_left -= 8;
 546                         }
 547                 }
 548                 else /* (type == SCAN_IN) */
 549                 {
 550                         bits_left -= 8 * (thisrun_bytes);
 551                 }
 552         }
 553
 554         /* the most signifcant bit is scanned during TAP movement */
 555         if (type != SCAN_IN)
 556                 last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1;
 557         else
 558                 last_bit = 0;
 559
 560         /* process remaining bits but the last one */
 561         if (bits_left > 1)
 562         {
 563                 if (type == SCAN_IO)
 564                 {
 565                         /* Clock Data Bits In and Out LSB First */
 566                         BUFFER_ADD = 0x3b;
 567                         //DEBUG("added TDI bits (io) %i", bits_left - 1);
 568                 }
 569                 else if (type == SCAN_OUT)
 570                 {
 571                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 572                         BUFFER_ADD = 0x1b;
 573                         //DEBUG("added TDI bits (o)");
 574                 }
 575                 else if (type == SCAN_IN)
 576                 {
 577                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 578                         BUFFER_ADD = 0x2a;
 579                         //DEBUG("added TDI bits (i %i)", bits_left - 1);
 580                 }
 581                 BUFFER_ADD = bits_left - 2;
 582                 if (type != SCAN_IN)
 583                         BUFFER_ADD = buffer[cur_byte];
 584         }
 585
 586         if ((ir_scan && (end_state == TAP_SI)) ||
 587                 (!ir_scan && (end_state == TAP_SD)))
 588         {
 589                 if (type == SCAN_IO)
 590                 {
 591                         /* Clock Data Bits In and Out LSB First */
 592                         BUFFER_ADD = 0x3b;
 593                         //DEBUG("added TDI bits (io) %i", bits_left - 1);
 594                 }
 595                 else if (type == SCAN_OUT)
 596                 {
 597                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 598                         BUFFER_ADD = 0x1b;
 599                         //DEBUG("added TDI bits (o)");
 600                 }
 601                 else if (type == SCAN_IN)
 602                 {
 603                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 604                         BUFFER_ADD = 0x2a;
 605                         //DEBUG("added TDI bits (i %i)", bits_left - 1);
 606                 }
 607                 BUFFER_ADD = 0x0;
 608                 BUFFER_ADD = last_bit;
 609         }
 610         else
 611         {
 612                 /* move from Shift-IR/DR to end state */
 613                 if (type != SCAN_OUT)
 614                 {
 615                         /* Clock Data to TMS/CS Pin with Read */
 616                         BUFFER_ADD = 0x6b;
 617                         //DEBUG("added TMS scan (read)");
 618                 }
 619                 else
 620                 {
 621                         /* Clock Data to TMS/CS Pin (no Read) */
 622                         BUFFER_ADD = 0x4b;
 623                         //DEBUG("added TMS scan (no read)");
 624                 }
 625                 BUFFER_ADD = 0x6;
 626                 BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7);
 627                 cur_state = end_state;
 628         }
 629 }
 630
 631 int ft2232_large_scan(scan_command_t *cmd, enum scan_type type, u8 *buffer, int scan_size)
 632 {
 633         int num_bytes = (scan_size + 7) / 8;
 634         int bits_left = scan_size;
 635         int cur_byte = 0;
 636         int last_bit;
 637         u8 *receive_buffer = malloc(CEIL(scan_size, 8));
 638         u8 *receive_pointer = receive_buffer;
 639         u32 bytes_written;
 640         u32 bytes_read;
 641         int retval;
 642         int thisrun_read = 0;
 643
 644         if (cmd->ir_scan)
 645         {
 646                 ERROR("BUG: large IR scans are not supported");
 647                 exit(-1);
 648         }
 649
 650         if (cur_state != TAP_SD)
 651         {
 652                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 653                 BUFFER_ADD = 0x4b;
 654                 /* scan 7 bit */
 655                 BUFFER_ADD = 0x6;
 656                 /* TMS data bits */
 657                 BUFFER_ADD = TAP_MOVE(cur_state, TAP_SD);
 658                 cur_state = TAP_SD;
 659         }
 660
 661         if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 662         {
 663                 ERROR("couldn't write MPSSE commands to FT2232");
 664                 exit(-1);
 665         }
 666         DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 667         ft2232_buffer_size = 0;
 668
 669         /* add command for complete bytes */
 670         while (num_bytes > 1)
 671         {
 672                 int thisrun_bytes;
 673
 674                 if (type == SCAN_IO)
 675                 {
 676                         /* Clock Data Bytes In and Out LSB First */
 677                         BUFFER_ADD = 0x39;
 678                         //DEBUG("added TDI bytes (io %i)", num_bytes);
 679                 }
 680                 else if (type == SCAN_OUT)
 681                 {
 682                         /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
 683                         BUFFER_ADD = 0x19;
 684                         //DEBUG("added TDI bytes (o)");
 685                 }
 686                 else if (type == SCAN_IN)
 687                 {
 688                         /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
 689                         BUFFER_ADD = 0x28;
 690                         //DEBUG("added TDI bytes (i %i)", num_bytes);
 691                 }
 692                 thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
 693                 thisrun_read = thisrun_bytes;
 694                 num_bytes -= thisrun_bytes;
 695                 BUFFER_ADD = (thisrun_bytes - 1) & 0xff;
 696                 BUFFER_ADD = ((thisrun_bytes - 1) >> 8) & 0xff;
 697                 if (type != SCAN_IN)
 698                 {
 699                         /* add complete bytes */
 700                         while(thisrun_bytes-- > 0)
 701                         {
 702                                 BUFFER_ADD = buffer[cur_byte];
 703                                 cur_byte++;
 704                                 bits_left -= 8;
 705                         }
 706                 }
 707                 else /* (type == SCAN_IN) */
 708                 {
 709                         bits_left -= 8 * (thisrun_bytes);
 710                 }
 711
 712                 if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 713                 {
 714                         ERROR("couldn't write MPSSE commands to FT2232");
 715                         exit(-1);
 716                 }
 717                 DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 718                 ft2232_buffer_size = 0;
 719
 720                 if (type != SCAN_OUT)
 721                 {
 722                         if ((retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read)) != ERROR_OK)
 723                         {
 724                                 ERROR("couldn't read from FT2232");
 725                                 exit(-1);
 726                         }
 727                         DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
 728                         receive_pointer += bytes_read;
 729                 }
 730         }
 731
 732         thisrun_read = 0;
 733
 734         /* the most signifcant bit is scanned during TAP movement */
 735         if (type != SCAN_IN)
 736                 last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1;
 737         else
 738                 last_bit = 0;
 739
 740         /* process remaining bits but the last one */
 741         if (bits_left > 1)
 742         {
 743                 if (type == SCAN_IO)
 744                 {
 745                         /* Clock Data Bits In and Out LSB First */
 746                         BUFFER_ADD = 0x3b;
 747                         //DEBUG("added TDI bits (io) %i", bits_left - 1);
 748                 }
 749                 else if (type == SCAN_OUT)
 750                 {
 751                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 752                         BUFFER_ADD = 0x1b;
 753                         //DEBUG("added TDI bits (o)");
 754                 }
 755                 else if (type == SCAN_IN)
 756                 {
 757                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 758                         BUFFER_ADD = 0x2a;
 759                         //DEBUG("added TDI bits (i %i)", bits_left - 1);
 760                 }
 761                 BUFFER_ADD = bits_left - 2;
 762                 if (type != SCAN_IN)
 763                         BUFFER_ADD = buffer[cur_byte];
 764
 765                 if (type != SCAN_OUT)
 766                         thisrun_read += 2;
 767         }
 768
 769         if (end_state == TAP_SD)
 770         {
 771                 if (type == SCAN_IO)
 772                 {
 773                         /* Clock Data Bits In and Out LSB First */
 774                         BUFFER_ADD = 0x3b;
 775                         //DEBUG("added TDI bits (io) %i", bits_left - 1);
 776                 }
 777                 else if (type == SCAN_OUT)
 778                 {
 779                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 780                         BUFFER_ADD = 0x1b;
 781                         //DEBUG("added TDI bits (o)");
 782                 }
 783                 else if (type == SCAN_IN)
 784                 {
 785                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 786                         BUFFER_ADD = 0x2a;
 787                         //DEBUG("added TDI bits (i %i)", bits_left - 1);
 788                 }
 789                 BUFFER_ADD = 0x0;
 790                 BUFFER_ADD = last_bit;
 791         }
 792         else
 793         {
 794                 /* move from Shift-IR/DR to end state */
 795                 if (type != SCAN_OUT)
 796                 {
 797                         /* Clock Data to TMS/CS Pin with Read */
 798                         BUFFER_ADD = 0x6b;
 799                         //DEBUG("added TMS scan (read)");
 800                 }
 801                 else
 802                 {
 803                         /* Clock Data to TMS/CS Pin (no Read) */
 804                         BUFFER_ADD = 0x4b;
 805                         //DEBUG("added TMS scan (no read)");
 806                 }
 807                 BUFFER_ADD = 0x6;
 808                 BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7);
 809                 cur_state = end_state;
 810         }
 811
 812         if (type != SCAN_OUT)
 813                 thisrun_read += 1;
 814
 815         if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 816         {
 817                 ERROR("couldn't write MPSSE commands to FT2232");
 818                 exit(-1);
 819         }
 820         DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 821         ft2232_buffer_size = 0;
 822
 823         if (type != SCAN_OUT)
 824         {
 825                 if ((retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read)) != ERROR_OK)
 826                 {
 827                         ERROR("couldn't read from FT2232");
 828                         exit(-1);
 829                 }
 830                 DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
 831                 receive_pointer += bytes_read;
 832         }
 833
 834         return ERROR_OK;
 835 }
 836
 837 int ft2232_predict_scan_out(int scan_size, enum scan_type type)
 838 {
 839         int predicted_size = 3;
 840         int num_bytes = (scan_size - 1) / 8;
 841
 842         if (cur_state != TAP_SD)
 843                 predicted_size += 3;
 844
 845         if (type == SCAN_IN)    /* only from device to host */
 846         {
 847                 /* complete bytes */
 848                 predicted_size += (CEIL(num_bytes, 65536)) * 3;
 849                 /* remaining bits - 1 (up to 7) */
 850                 predicted_size += ((scan_size - 1) % 8) ? 2 : 0;
 851         }
 852         else                                    /* host to device, or bidirectional */
 853         {
 854                 /* complete bytes */
 855                 predicted_size += num_bytes + (CEIL(num_bytes, 65536)) * 3;
 856                 /* remaining bits -1 (up to 7) */
 857                 predicted_size += ((scan_size - 1) % 8) ? 3 : 0;
 858         }
 859
 860         return predicted_size;
 861 }
 862
 863 int ft2232_predict_scan_in(int scan_size, enum scan_type type)
 864 {
 865         int predicted_size = 0;
 866
 867         if (type != SCAN_OUT)
 868         {
 869                 /* complete bytes */
 870                 predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) - 1) : 0;
 871                 /* remaining bits - 1 */
 872                 predicted_size += ((scan_size - 1) % 8) ? 1 : 0;
 873                 /* last bit (from TMS scan) */
 874                 predicted_size += 1;
 875         }
 876
 877         //DEBUG("scan_size: %i, predicted_size: %i", scan_size, predicted_size);
 878
 879         return predicted_size;
 880 }
 881
 882 void usbjtag_reset(int trst, int srst)
 883 {
 884         if (trst == 1)
 885         {
 886                 cur_state = TAP_TLR;
 887                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 888                         low_direction |= nTRSTnOE;      /* switch to output pin (output is low) */
 889                 else
 890                         low_output &= ~nTRST;   /* switch output low */
 891         }
 892         else if (trst == 0)
 893         {
 894                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 895                         low_direction &= ~nTRSTnOE; /* switch to input pin (high-Z + internal and external pullup) */
 896                 else
 897                         low_output |= nTRST; /* switch output high */
 898         }
 899
 900         if (srst == 1)
 901         {
 902                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 903                         low_output &= ~nSRST;   /* switch output low */
 904                 else
 905                         low_direction |= nSRSTnOE;      /* switch to output pin (output is low) */
 906         }
 907         else if (srst == 0)
 908         {
 909                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 910                         low_output |= nSRST;    /* switch output high */
 911                 else
 912                         low_direction &= ~nSRSTnOE;     /* switch to input pin (high-Z) */
 913         }
 914
 915         /* command "set data bits low byte" */
 916         BUFFER_ADD = 0x80;
 917         BUFFER_ADD = low_output;
 918         BUFFER_ADD = low_direction;
 919
 920 }
 921
 922 void jtagkey_reset(int trst, int srst)
 923 {
 924         if (trst == 1)
 925         {
 926                 cur_state = TAP_TLR;
 927                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 928                         high_output &= ~nTRSTnOE;
 929                 else
 930                         high_output &= ~nTRST;
 931         }
 932         else if (trst == 0)
 933         {
 934                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 935                         high_output |= nTRSTnOE;
 936                 else
 937                         high_output |= nTRST;
 938         }
 939
 940         if (srst == 1)
 941         {
 942                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 943                         high_output &= ~nSRST;
 944                 else
 945                         high_output &= ~nSRSTnOE;
 946         }
 947         else if (srst == 0)
 948         {
 949                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 950                         high_output |= nSRST;
 951                 else
 952                         high_output |= nSRSTnOE;
 953         }
 954
 955         /* command "set data bits high byte" */
 956         BUFFER_ADD = 0x82;
 957         BUFFER_ADD = high_output;
 958         BUFFER_ADD = high_direction;
 959         DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
 960 }
 961
 962 void olimex_jtag_reset(int trst, int srst)
 963 {
 964         if (trst == 1)
 965         {
 966                 cur_state = TAP_TLR;
 967                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 968                         high_output &= ~nTRSTnOE;
 969                 else
 970                         high_output &= ~nTRST;
 971         }
 972         else if (trst == 0)
 973         {
 974                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 975                         high_output |= nTRSTnOE;
 976                 else
 977                         high_output |= nTRST;
 978         }
 979
 980     if (srst == 1)
 981     {
 982         high_output |= nSRST;
 983     }
 984     else if (srst == 0)
 985     {
 986         high_output &= ~nSRST;
 987     }
 988
 989     /* command "set data bits high byte" */
 990     BUFFER_ADD = 0x82;
 991     BUFFER_ADD = high_output;
 992     BUFFER_ADD = high_direction;
 993     DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
 994 }
 995
 996 void flyswatter_reset(int trst, int srst)
 997 {
 998         if (trst == 1)
 999         {
1000                 cur_state = TAP_TLR;
1001                 low_output &= ~nTRST;
1002         }
1003         else if (trst == 0)
1004         {
1005                 low_output |= nTRST;
1006         }
1007
1008     if (srst == 1)
1009     {
1010         low_output |= nSRST;
1011     }
1012     else if (srst == 0)
1013     {
1014         low_output &= ~nSRST;
1015     }
1016
1017     /* command "set data bits low byte" */
1018     BUFFER_ADD = 0x80;
1019     BUFFER_ADD = low_output;
1020     BUFFER_ADD = low_direction;
1021     DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", trst, srst, low_output, low_direction);
1022 }
1023
1024 void turtle_reset(int trst, int srst)
1025 {
1026         trst = trst;
1027
1028         if (srst == 1)
1029         {
1030                 low_output |= nSRST;
1031         }
1032         else if (srst == 0)
1033         {
1034                 low_output &= ~nSRST;
1035         }
1036
1037         /* command "set data bits low byte" */
1038         BUFFER_ADD = 0x80;
1039         BUFFER_ADD = low_output;
1040         BUFFER_ADD = low_direction;
1041         DEBUG("srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", srst, low_output, low_direction);
1042 }
1043
1044 void comstick_reset(int trst, int srst)
1045 {
1046         if (trst == 1)
1047         {
1048                 cur_state = TAP_TLR;
1049                 high_output &= ~nTRST;
1050         }
1051         else if (trst == 0)
1052         {
1053                 high_output |= nTRST;
1054         }
1055
1056     if (srst == 1)
1057     {
1058         high_output &= ~nSRST;
1059     }
1060     else if (srst == 0)
1061     {
1062         high_output |= nSRST;
1063     }
1064
1065         /* command "set data bits high byte" */
1066         BUFFER_ADD = 0x82;
1067         BUFFER_ADD = high_output;
1068         BUFFER_ADD = high_direction;
1069         DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1070 }
1071
1072 int ft2232_execute_queue()
1073 {
1074         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
1075         jtag_command_t *first_unsent = cmd;     /* next command that has to be sent */
1076         u8 *buffer;
1077         int scan_size;  /* size of IR or DR scan */
1078         enum scan_type type;
1079         int i;
1080         int predicted_size = 0;
1081         int require_send = 0;
1082         int retval;
1083
1084         /* return ERROR_OK, unless ft2232_send_and_recv reports a failed check
1085          * that wasn't handled by a caller-provided error handler
1086          */
1087         retval = ERROR_OK;
1088
1089         ft2232_buffer_size = 0;
1090         ft2232_expect_read = 0;
1091
1092         /* blink, if the current layout has that feature */
1093         if (layout->blink)
1094                 layout->blink();
1095
1096         while (cmd)
1097         {
1098                 switch(cmd->type)
1099                 {
1100                         case JTAG_END_STATE:
1101                                 if (cmd->cmd.end_state->end_state != -1)
1102                                         ft2232_end_state(cmd->cmd.end_state->end_state);
1103                                 break;
1104                         case JTAG_RESET:
1105                                 /* only send the maximum buffer size that FT2232C can handle */
1106                                 predicted_size = 3;
1107                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1108                                 {
1109                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1110                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1111                                         require_send = 0;
1112                                         first_unsent = cmd;
1113                                 }
1114
1115                                 layout->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
1116                                 require_send = 1;
1117
1118 #ifdef _DEBUG_JTAG_IO_
1119                                 DEBUG("trst: %i, srst: %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
1120 #endif
1121                                 break;
1122                         case JTAG_RUNTEST:
1123                                 /* only send the maximum buffer size that FT2232C can handle */
1124                                 predicted_size = 0;
1125                                 if (cur_state != TAP_RTI)
1126                                         predicted_size += 3;
1127                                 predicted_size += 3 * CEIL(cmd->cmd.runtest->num_cycles, 7);
1128                                 if ((cmd->cmd.runtest->end_state != -1) && (cmd->cmd.runtest->end_state != TAP_RTI))
1129                                         predicted_size += 3;
1130                                 if ((cmd->cmd.runtest->end_state == -1) && (end_state != TAP_RTI))
1131                                         predicted_size += 3;
1132                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1133                                 {
1134                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1135                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1136                                         require_send = 0;
1137                                         first_unsent = cmd;
1138                                 }
1139                                 if (cur_state != TAP_RTI)
1140                                 {
1141                                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1142                                         BUFFER_ADD = 0x4b;
1143                                         /* scan 7 bit */
1144                                         BUFFER_ADD = 0x6;
1145                                         /* TMS data bits */
1146                                         BUFFER_ADD = TAP_MOVE(cur_state, TAP_RTI);
1147                                         cur_state = TAP_RTI;
1148                                         require_send = 1;
1149                                 }
1150                                 i = cmd->cmd.runtest->num_cycles;
1151                                 while (i > 0)
1152                                 {
1153                                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1154                                         BUFFER_ADD = 0x4b;
1155                                         /* scan 7 bit */
1156                                         BUFFER_ADD = (i > 7) ? 6 : (i - 1);
1157                                         /* TMS data bits */
1158                                         BUFFER_ADD = 0x0;
1159                                         cur_state = TAP_RTI;
1160                                         i -= (i > 7) ? 7 : i;
1161                                         //DEBUG("added TMS scan (no read)");
1162                                 }
1163                                 if (cmd->cmd.runtest->end_state != -1)
1164                                         ft2232_end_state(cmd->cmd.runtest->end_state);
1165                                 if (cur_state != end_state)
1166                                 {
1167                                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1168                                         BUFFER_ADD = 0x4b;
1169                                         /* scan 7 bit */
1170                                         BUFFER_ADD = 0x6;
1171                                         /* TMS data bits */
1172                                         BUFFER_ADD = TAP_MOVE(cur_state, end_state);
1173                                         cur_state = end_state;
1174                                         //DEBUG("added TMS scan (no read)");
1175                                 }
1176                                 require_send = 1;
1177 #ifdef _DEBUG_JTAG_IO_
1178                                 DEBUG("runtest: %i, end in %i", cmd->cmd.runtest->num_cycles, end_state);
1179 #endif
1180                                 break;
1181                         case JTAG_STATEMOVE:
1182                                 /* only send the maximum buffer size that FT2232C can handle */
1183                                 predicted_size = 3;
1184                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1185                                 {
1186                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1187                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1188                                         require_send = 0;
1189                                         first_unsent = cmd;
1190                                 }
1191                                 if (cmd->cmd.statemove->end_state != -1)
1192                                         ft2232_end_state(cmd->cmd.statemove->end_state);
1193                                 /* command "Clock Data to TMS/CS Pin (no Read)" */
1194                                 BUFFER_ADD = 0x4b;
1195                                 /* scan 7 bit */
1196                                 BUFFER_ADD = 0x6;
1197                                 /* TMS data bits */
1198                                 BUFFER_ADD = TAP_MOVE(cur_state, end_state);
1199                                 //DEBUG("added TMS scan (no read)");
1200                                 cur_state = end_state;
1201                                 require_send = 1;
1202 #ifdef _DEBUG_JTAG_IO_
1203                                 DEBUG("statemove: %i", end_state);
1204 #endif
1205                                 break;
1206                         case JTAG_PATHMOVE:
1207                                 /* only send the maximum buffer size that FT2232C can handle */
1208                                 predicted_size = 3 * CEIL(cmd->cmd.pathmove->num_states, 7);
1209                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1210                                 {
1211                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1212                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1213                                         require_send = 0;
1214                                         first_unsent = cmd;
1215                                 }
1216                                 ft2232_add_pathmove(cmd->cmd.pathmove);
1217                                 require_send = 1;
1218 #ifdef _DEBUG_JTAG_IO_
1219                                 DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
1220 #endif
1221                                 break;
1222                         case JTAG_SCAN:
1223                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
1224                                 type = jtag_scan_type(cmd->cmd.scan);
1225                                 predicted_size = ft2232_predict_scan_out(scan_size, type);
1226                                 if ((predicted_size + 1) > FT2232_BUFFER_SIZE)
1227                                 {
1228                                         DEBUG("oversized ft2232 scan (predicted_size > FT2232_BUFFER_SIZE)");
1229                                         /* unsent commands before this */
1230                                         if (first_unsent != cmd)
1231                                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1232                                                         retval = ERROR_JTAG_QUEUE_FAILED;
1233
1234                                         /* current command */
1235                                         if (cmd->cmd.scan->end_state != -1)
1236                                                 ft2232_end_state(cmd->cmd.scan->end_state);
1237                                         ft2232_large_scan(cmd->cmd.scan, type, buffer, scan_size);
1238                                         require_send = 0;
1239                                         first_unsent = cmd->next;
1240                                         if (buffer)
1241                                                 free(buffer);
1242                                         break;
1243                                 }
1244                                 else if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1245                                 {
1246                                         DEBUG("ft2232 buffer size reached, sending queued commands (first_unsent: %p, cmd: %p)", first_unsent, cmd);
1247                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1248                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1249                                         require_send = 0;
1250                                         first_unsent = cmd;
1251                                 }
1252                                 ft2232_expect_read += ft2232_predict_scan_in(scan_size, type);
1253                                 //DEBUG("new read size: %i", ft2232_expect_read);
1254                                 if (cmd->cmd.scan->end_state != -1)
1255                                         ft2232_end_state(cmd->cmd.scan->end_state);
1256                                 ft2232_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
1257                                 require_send = 1;
1258                                 if (buffer)
1259                                         free(buffer);
1260 #ifdef _DEBUG_JTAG_IO_
1261                                 DEBUG("%s scan, %i bit, end in %i", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size, end_state);
1262 #endif
1263                                 break;
1264                         case JTAG_SLEEP:
1265                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1266                                         retval = ERROR_JTAG_QUEUE_FAILED;
1267                                 first_unsent = cmd->next;
1268                                 jtag_sleep(cmd->cmd.sleep->us);
1269 #ifdef _DEBUG_JTAG_IO_
1270                                 DEBUG("sleep %i usec", cmd->cmd.sleep->us);
1271 #endif
1272                                 break;
1273                         default:
1274                                 ERROR("BUG: unknown JTAG command type encountered");
1275                                 exit(-1);
1276                 }
1277                 cmd = cmd->next;
1278         }
1279
1280         if (require_send > 0)
1281                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1282                         retval = ERROR_JTAG_QUEUE_FAILED;
1283
1284         return retval;
1285 }
1286
1287 #if BUILD_FT2232_FTD2XX == 1
1288 static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int *try_more)
1289 {
1290         FT_STATUS status;
1291         DWORD openex_flags = 0;
1292         char *openex_string = NULL;
1293         u8 latency_timer;
1294
1295         DEBUG("'ft2232' interface using FTD2XX with '%s' layout (%4.4x:%4.4x)",
1296             ft2232_layout, vid, pid);
1297
1298 #if IS_WIN32 == 0
1299         /* Add non-standard Vid/Pid to the linux driver */
1300         if ((status = FT_SetVIDPID(vid, pid)) != FT_OK)
1301         {
1302                 WARNING("couldn't add %4.4x:%4.4x",
1303                     vid, pid);
1304         }
1305 #endif
1306
1307         if (ft2232_device_desc && ft2232_serial)
1308         {
1309                 WARNING("can't open by device description and serial number, giving precedence to serial");
1310                 ft2232_device_desc = NULL;
1311         }
1312
1313         if (ft2232_device_desc)
1314         {
1315                 openex_string = ft2232_device_desc;
1316                 openex_flags = FT_OPEN_BY_DESCRIPTION;
1317         }
1318         else if (ft2232_serial)
1319         {
1320                 openex_string = ft2232_serial;
1321                 openex_flags = FT_OPEN_BY_SERIAL_NUMBER;
1322         }
1323         else
1324         {
1325                 ERROR("neither device description nor serial number specified");
1326                 ERROR("please add \"ft2232_device_desc <string>\" or \"ft2232_serial <string>\" to your .cfg file");
1327
1328                 return ERROR_JTAG_INIT_FAILED;
1329         }
1330
1331         if ((status = FT_OpenEx(openex_string, openex_flags, &ftdih)) != FT_OK)
1332         {
1333                 DWORD num_devices;
1334
1335                 if (more) {
1336                         WARNING("unable to open ftdi device (trying more): %lu",
1337                             status);
1338                         *try_more = 1;
1339                         return ERROR_JTAG_INIT_FAILED;
1340                 }
1341                 ERROR("unable to open ftdi device: %lu", status);
1342                 status = FT_ListDevices(&num_devices, NULL, FT_LIST_NUMBER_ONLY);
1343                 if (status == FT_OK)
1344                 {
1345                         char **desc_array = malloc(sizeof(char*) * (num_devices + 1));
1346                         int i;
1347
1348                         for (i = 0; i < num_devices; i++)
1349                                 desc_array[i] = malloc(64);
1350                         desc_array[num_devices] = NULL;
1351
1352                         status = FT_ListDevices(desc_array, &num_devices, FT_LIST_ALL | openex_flags);
1353
1354                         if (status == FT_OK)
1355                         {
1356                                 ERROR("ListDevices: %lu\n", num_devices);
1357                                 for (i = 0; i < num_devices; i++)
1358                                         ERROR("%i: %s", i, desc_array[i]);
1359                         }
1360
1361                         for (i = 0; i < num_devices; i++)
1362                                 free(desc_array[i]);
1363                         free(desc_array);
1364                 }
1365                 else
1366                 {
1367                         printf("ListDevices: NONE\n");
1368                 }
1369                 return ERROR_JTAG_INIT_FAILED;
1370         }
1371
1372         if ((status = FT_SetLatencyTimer(ftdih, 2)) != FT_OK)
1373         {
1374                 ERROR("unable to set latency timer: %lu", status);
1375                 return ERROR_JTAG_INIT_FAILED;
1376         }
1377
1378         if ((status = FT_GetLatencyTimer(ftdih, &latency_timer)) != FT_OK)
1379         {
1380                 ERROR("unable to get latency timer: %lu", status);
1381                 return ERROR_JTAG_INIT_FAILED;
1382         }
1383         else
1384         {
1385                 DEBUG("current latency timer: %i", latency_timer);
1386         }
1387
1388         if ((status = FT_SetTimeouts(ftdih, 5000, 5000)) != FT_OK)
1389         {
1390                 ERROR("unable to set timeouts: %lu", status);
1391                 return ERROR_JTAG_INIT_FAILED;
1392         }
1393
1394         if ((status = FT_SetBitMode(ftdih, 0x0b, 2)) != FT_OK)
1395         {
1396                 ERROR("unable to enable bit i/o mode: %lu", status);
1397                 return ERROR_JTAG_INIT_FAILED;
1398         }
1399
1400         return ERROR_OK;
1401 }
1402
1403 static int ft2232_purge_ftd2xx(void)
1404 {
1405         FT_STATUS status;
1406
1407         if ((status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK)
1408         {
1409                 ERROR("error purging ftd2xx device: %lu", status);
1410                 return ERROR_JTAG_INIT_FAILED;
1411         }
1412
1413         return ERROR_OK;
1414 }
1415 #endif /* BUILD_FT2232_FTD2XX == 1 */
1416
1417 #if BUILD_FT2232_LIBFTDI == 1
1418 static int ft2232_init_libftdi(u16 vid, u16 pid, int more, int *try_more)
1419 {
1420         u8 latency_timer;
1421
1422         DEBUG("'ft2232' interface using libftdi with '%s' layout (%4.4x:%4.4x)",
1423             ft2232_layout, vid, pid);
1424
1425         if (ftdi_init(&ftdic) < 0)
1426                 return ERROR_JTAG_INIT_FAILED;
1427
1428         /* context, vendor id, product id */
1429         if (ftdi_usb_open_desc(&ftdic, vid, pid, ft2232_device_desc,
1430             ft2232_serial) < 0) {
1431                 if (more)
1432                         WARNING("unable to open ftdi device (trying more): %s",
1433                              ftdic.error_str);
1434                 else
1435                         ERROR("unable to open ftdi device: %s", ftdic.error_str);
1436                 *try_more = 1;
1437                 return ERROR_JTAG_INIT_FAILED;
1438         }
1439
1440         if (ftdi_set_interface(&ftdic, INTERFACE_A) < 0)
1441         {
1442                 ERROR("unable to select FT2232 channel A: %s", ftdic.error_str);
1443                 return ERROR_JTAG_INIT_FAILED;
1444         }
1445
1446         if (ftdi_usb_reset(&ftdic) < 0)
1447         {
1448                 ERROR("unable to reset ftdi device");
1449                 return ERROR_JTAG_INIT_FAILED;
1450         }
1451
1452         if (ftdi_set_latency_timer(&ftdic, 2) < 0)
1453         {
1454                 ERROR("unable to set latency timer");
1455                 return ERROR_JTAG_INIT_FAILED;
1456         }
1457
1458         if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0)
1459         {
1460                 ERROR("unable to get latency timer");
1461                 return ERROR_JTAG_INIT_FAILED;
1462         }
1463         else
1464         {
1465                 DEBUG("current latency timer: %i", latency_timer);
1466         }
1467
1468         ftdi_set_bitmode(&ftdic, 0x0b, 2); /* ctx, JTAG I/O mask */
1469
1470         return ERROR_OK;
1471 }
1472
1473 static int ft2232_purge_libftdi(void)
1474 {
1475         if (ftdi_usb_purge_buffers(&ftdic) < 0)
1476         {
1477                 ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
1478                 return ERROR_JTAG_INIT_FAILED;
1479         }
1480
1481         return ERROR_OK;
1482 }
1483 #endif /* BUILD_FT2232_LIBFTDI == 1 */
1484
1485 int ft2232_init(void)
1486 {
1487         u8 buf[1];
1488         int retval;
1489         u32 bytes_written;
1490         ft2232_layout_t *cur_layout = ft2232_layouts;
1491         int i;
1492
1493         if ((ft2232_layout == NULL) || (ft2232_layout[0] == 0))
1494         {
1495                 ft2232_layout = "usbjtag";
1496                 WARNING("No ft2232 layout specified, using default 'usbjtag'");
1497         }
1498
1499         while (cur_layout->name)
1500         {
1501                 if (strcmp(cur_layout->name, ft2232_layout) == 0)
1502                 {
1503                         layout = cur_layout;
1504                         break;
1505                 }
1506                 cur_layout++;
1507         }
1508
1509         if (!layout)
1510         {
1511                 ERROR("No matching layout found for %s", ft2232_layout);
1512                 return ERROR_JTAG_INIT_FAILED;
1513         }
1514
1515         for (i = 0; 1; i++) {
1516                 /*
1517                  * "more indicates that there are more IDs to try, so we should
1518                  * not print an error for an ID mismatch (but for anything
1519                  * else, we should).
1520                  *
1521                  * try_more indicates that the error code returned indicates an
1522                  * ID mismatch (and nothing else) and that we should proceeed
1523                  * with the next ID pair.
1524                  */
1525                 int more = ft2232_vid[i+1] || ft2232_pid[i+1];
1526                 int try_more = 0;
1527
1528 #if BUILD_FT2232_FTD2XX == 1
1529                 retval = ft2232_init_ftd2xx(ft2232_vid[i], ft2232_pid[i],
1530                     more, &try_more);
1531 #elif BUILD_FT2232_LIBFTDI == 1
1532                 retval = ft2232_init_libftdi(ft2232_vid[i], ft2232_pid[i],
1533                     more, &try_more);
1534 #endif
1535                 if (retval >= 0)
1536                         break;
1537                 if (!more || !try_more)
1538                         return retval;
1539         }
1540
1541         ft2232_buffer_size = 0;
1542         ft2232_buffer = malloc(FT2232_BUFFER_SIZE);
1543
1544         if (layout->init() != ERROR_OK)
1545                 return ERROR_JTAG_INIT_FAILED;
1546
1547         ft2232_speed(jtag_speed);
1548
1549         buf[0] = 0x85; /* Disconnect TDI/DO to TDO/DI for Loopback */
1550         if (((retval = ft2232_write(buf, 1, &bytes_written)) != ERROR_OK) || (bytes_written != 1))
1551         {
1552                 ERROR("couldn't write to FT2232 to disable loopback");
1553                 return ERROR_JTAG_INIT_FAILED;
1554         }
1555
1556 #if BUILD_FT2232_FTD2XX == 1
1557         return ft2232_purge_ftd2xx();
1558 #elif BUILD_FT2232_LIBFTDI == 1
1559         return ft2232_purge_libftdi();
1560 #endif
1561
1562         return ERROR_OK;
1563 }
1564
1565 int usbjtag_init(void)
1566 {
1567         u8 buf[3];
1568         u32 bytes_written;
1569
1570         low_output = 0x08;
1571         low_direction = 0x0b;
1572
1573         if (strcmp(ft2232_layout, "usbjtag") == 0)
1574         {
1575                 nTRST = 0x10;
1576                 nTRSTnOE = 0x10;
1577                 nSRST = 0x40;
1578                 nSRSTnOE = 0x40;
1579         }
1580         else if (strcmp(ft2232_layout, "signalyzer") == 0)
1581         {
1582                 nTRST = 0x10;
1583                 nTRSTnOE = 0x10;
1584                 nSRST = 0x20;
1585                 nSRSTnOE = 0x20;
1586         }
1587         else if (strcmp(ft2232_layout, "evb_lm3s811") == 0)
1588         {
1589                 nTRST = 0x0;
1590                 nTRSTnOE = 0x00;
1591                 nSRST = 0x20;
1592                 nSRSTnOE = 0x20;
1593                 low_output = 0x88;
1594                 low_direction = 0x8b;
1595         }
1596         else
1597         {
1598                 ERROR("BUG: usbjtag_init called for unknown layout '%s'", ft2232_layout);
1599                 return ERROR_JTAG_INIT_FAILED;
1600         }
1601
1602         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1603         {
1604                 low_direction &= ~nTRSTnOE; /* nTRST input */
1605                 low_output &= ~nTRST; /* nTRST = 0 */
1606         }
1607         else
1608         {
1609                 low_direction |= nTRSTnOE; /* nTRST output */
1610                 low_output |= nTRST; /* nTRST = 1 */
1611         }
1612
1613         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1614         {
1615                 low_direction |= nSRSTnOE; /* nSRST output */
1616                 low_output |= nSRST; /* nSRST = 1 */
1617         }
1618         else
1619         {
1620                 low_direction &= ~nSRSTnOE; /* nSRST input */
1621                 low_output &= ~nSRST; /* nSRST = 0 */
1622         }
1623
1624         /* initialize low byte for jtag */
1625         buf[0] = 0x80; /* command "set data bits low byte" */
1626         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, xRST high) */
1627         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
1628         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1629
1630         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1631         {
1632                 ERROR("couldn't initialize FT2232 with 'USBJTAG' layout");
1633                 return ERROR_JTAG_INIT_FAILED;
1634         }
1635
1636         return ERROR_OK;
1637 }
1638
1639 int jtagkey_init(void)
1640 {
1641         u8 buf[3];
1642         u32 bytes_written;
1643
1644         low_output = 0x08;
1645         low_direction = 0x1b;
1646
1647         /* initialize low byte for jtag */
1648         buf[0] = 0x80; /* command "set data bits low byte" */
1649         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1650         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1651         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1652
1653         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1654         {
1655                 ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1656                 return ERROR_JTAG_INIT_FAILED;
1657         }
1658
1659         if (strcmp(layout->name, "jtagkey") == 0)
1660         {
1661                 nTRST = 0x01;
1662                 nTRSTnOE = 0x4;
1663                 nSRST = 0x02;
1664                 nSRSTnOE = 0x08;
1665         }
1666         else if ((strcmp(layout->name, "jtagkey_prototype_v1") == 0) ||
1667                 (strcmp(layout->name, "oocdlink") == 0))
1668         {
1669                 nTRST = 0x02;
1670                 nTRSTnOE = 0x1;
1671                 nSRST = 0x08;
1672                 nSRSTnOE = 0x04;
1673         }
1674         else
1675         {
1676                 ERROR("BUG: jtagkey_init called for non jtagkey layout");
1677                 exit(-1);
1678         }
1679
1680         high_output = 0x0;
1681         high_direction = 0x0f;
1682
1683         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1684         {
1685                 high_output |= nTRSTnOE;
1686                 high_output &= ~nTRST;
1687         }
1688         else
1689         {
1690                 high_output &= ~nTRSTnOE;
1691                 high_output |= nTRST;
1692         }
1693
1694         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1695         {
1696                 high_output &= ~nSRSTnOE;
1697                 high_output |= nSRST;
1698         }
1699         else
1700         {
1701                 high_output |= nSRSTnOE;
1702                 high_output &= ~nSRST;
1703         }
1704
1705         /* initialize high port */
1706         buf[0] = 0x82; /* command "set data bits high byte" */
1707         buf[1] = high_output; /* value */
1708         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
1709         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1710
1711         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1712         {
1713                 ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1714                 return ERROR_JTAG_INIT_FAILED;
1715         }
1716
1717         return ERROR_OK;
1718 }
1719
1720 int olimex_jtag_init(void)
1721 {
1722         u8 buf[3];
1723         u32 bytes_written;
1724
1725         low_output = 0x08;
1726         low_direction = 0x1b;
1727
1728         /* initialize low byte for jtag */
1729         buf[0] = 0x80; /* command "set data bits low byte" */
1730         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1731         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1732         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1733
1734         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1735         {
1736                 ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1737                 return ERROR_JTAG_INIT_FAILED;
1738         }
1739
1740         nTRST = 0x01;
1741         nTRSTnOE = 0x4;
1742         nSRST = 0x02;
1743         nSRSTnOE = 0x00; /* no output enable for nSRST */
1744
1745         high_output = 0x0;
1746         high_direction = 0x0f;
1747
1748         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1749         {
1750                 high_output |= nTRSTnOE;
1751                 high_output &= ~nTRST;
1752         }
1753         else
1754         {
1755                 high_output &= ~nTRSTnOE;
1756                 high_output |= nTRST;
1757         }
1758
1759         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1760         {
1761                 ERROR("can't set nSRST to push-pull on the Olimex ARM-USB-OCD");
1762         }
1763         else
1764         {
1765                 high_output &= ~nSRST;
1766         }
1767
1768         /* turn red LED on */
1769         high_output |= 0x08;
1770
1771         /* initialize high port */
1772         buf[0] = 0x82; /* command "set data bits high byte" */
1773         buf[1] = high_output; /* value */
1774         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
1775         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1776
1777         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1778         {
1779                 ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1780                 return ERROR_JTAG_INIT_FAILED;
1781         }
1782
1783         return ERROR_OK;
1784 }
1785
1786 int flyswatter_init(void)
1787 {
1788         u8 buf[3];
1789         u32 bytes_written;
1790
1791         low_output = 0x18;
1792         low_direction = 0xfb;
1793
1794         /* initialize low byte for jtag */
1795         buf[0] = 0x80; /* command "set data bits low byte" */
1796         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1797         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE[12]=out, n[ST]srst=out */
1798         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1799
1800         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1801         {
1802                 ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
1803                 return ERROR_JTAG_INIT_FAILED;
1804         }
1805
1806         nTRST = 0x10;
1807         nTRSTnOE = 0x0; /* not output enable for nTRST */
1808         nSRST = 0x20;
1809         nSRSTnOE = 0x00; /* no output enable for nSRST */
1810
1811         high_output = 0x00;
1812         high_direction = 0x0c;
1813
1814         /* turn red LED1 on, LED2 off */
1815         high_output |= 0x08;
1816
1817         /* initialize high port */
1818         buf[0] = 0x82; /* command "set data bits high byte" */
1819         buf[1] = high_output; /* value */
1820         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
1821         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1822
1823         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1824         {
1825                 ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
1826                 return ERROR_JTAG_INIT_FAILED;
1827         }
1828
1829         return ERROR_OK;
1830 }
1831
1832 int turtle_init(void)
1833 {
1834         u8 buf[3];
1835         u32 bytes_written;
1836
1837         low_output = 0x08;
1838         low_direction = 0x5b;
1839
1840         /* initialize low byte for jtag */
1841         buf[0] = 0x80; /* command "set data bits low byte" */
1842         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1843         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1844         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1845
1846         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1847         {
1848                 ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
1849                 return ERROR_JTAG_INIT_FAILED;
1850         }
1851
1852         nSRST = 0x40;
1853
1854         high_output = 0x00;
1855         high_direction = 0x0C;
1856
1857         /* initialize high port */
1858         buf[0] = 0x82; /* command "set data bits high byte" */
1859         buf[1] = high_output;
1860         buf[2] = high_direction;
1861         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1862
1863         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1864         {
1865                 ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
1866                 return ERROR_JTAG_INIT_FAILED;
1867         }
1868
1869         return ERROR_OK;
1870 }
1871
1872 int comstick_init(void)
1873 {
1874         u8 buf[3];
1875         u32 bytes_written;
1876
1877         low_output = 0x08;
1878         low_direction = 0x0b;
1879
1880         /* initialize low byte for jtag */
1881         buf[0] = 0x80; /* command "set data bits low byte" */
1882         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1883         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1884         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1885
1886         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1887         {
1888                 ERROR("couldn't initialize FT2232 with 'comstick' layout");
1889                 return ERROR_JTAG_INIT_FAILED;
1890         }
1891
1892         nTRST = 0x01;
1893         nTRSTnOE = 0x00; /* no output enable for nTRST */
1894         nSRST = 0x02;
1895         nSRSTnOE = 0x00; /* no output enable for nSRST */
1896
1897         high_output = 0x03;
1898         high_direction = 0x03;
1899
1900         /* initialize high port */
1901         buf[0] = 0x82; /* command "set data bits high byte" */
1902         buf[1] = high_output;
1903         buf[2] = high_direction;
1904         DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1905
1906         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1907         {
1908                 ERROR("couldn't initialize FT2232 with 'comstick' layout");
1909                 return ERROR_JTAG_INIT_FAILED;
1910         }
1911
1912         return ERROR_OK;
1913 }
1914
1915 void olimex_jtag_blink(void)
1916 {
1917         /* Olimex ARM-USB-OCD has a LED connected to ACBUS3
1918          * ACBUS3 is bit 3 of the GPIOH port
1919          */
1920         if (high_output & 0x08)
1921         {
1922                 /* set port pin high */
1923                 high_output &= 0x07;
1924         }
1925         else
1926         {
1927                 /* set port pin low */
1928                 high_output |= 0x08;
1929         }
1930
1931         BUFFER_ADD = 0x82;
1932         BUFFER_ADD = high_output;
1933         BUFFER_ADD = high_direction;
1934 }
1935
1936 void turtle_jtag_blink(void)
1937 {
1938         /*
1939    * Turtelizer2 has two LEDs connected to ACBUS2 and ACBUS3
1940          */
1941         if (high_output & 0x08)
1942         {
1943                 high_output = 0x04;
1944         }
1945         else
1946         {
1947                 high_output = 0x08;
1948         }
1949
1950         BUFFER_ADD = 0x82;
1951         BUFFER_ADD = high_output;
1952         BUFFER_ADD = high_direction;
1953 }
1954
1955
1956 int ft2232_quit(void)
1957 {
1958 #if BUILD_FT2232_FTD2XX == 1
1959         FT_STATUS status;
1960
1961         status = FT_Close(ftdih);
1962 #elif BUILD_FT2232_LIBFTDI == 1
1963         ftdi_disable_bitbang(&ftdic);
1964
1965         ftdi_usb_close(&ftdic);
1966
1967         ftdi_deinit(&ftdic);
1968 #endif
1969
1970         free(ft2232_buffer);
1971
1972         return ERROR_OK;
1973 }
1974
1975 int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1976 {
1977         if (argc == 1)
1978         {
1979                 ft2232_device_desc = strdup(args[0]);
1980         }
1981         else
1982         {
1983                 ERROR("expected exactly one argument to ft2232_device_desc <description>");
1984         }
1985
1986         return ERROR_OK;
1987 }
1988
1989 int ft2232_handle_serial_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1990 {
1991         if (argc == 1)
1992         {
1993                 ft2232_serial = strdup(args[0]);
1994         }
1995         else
1996         {
1997                 ERROR("expected exactly one argument to ft2232_serial <serial-number>");
1998         }
1999
2000         return ERROR_OK;
2001 }
2002
2003 int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2004 {
2005         if (argc == 0)
2006                 return ERROR_OK;
2007
2008         ft2232_layout = malloc(strlen(args[0]) + 1);
2009         strcpy(ft2232_layout, args[0]);
2010
2011         return ERROR_OK;
2012 }
2013
2014 int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2015 {
2016         int i;
2017
2018         if (argc > MAX_USB_IDS*2) {
2019                 WARNING("ignoring extra IDs in ft2232_vid_pid "
2020                     "(maximum is %d pairs)", MAX_USB_IDS);
2021                 argc = MAX_USB_IDS*2;
2022         }
2023         if (argc < 2 || (argc & 1))
2024         {
2025                 WARNING("incomplete ft2232_vid_pid configuration directive");
2026                 if (argc < 2)
2027                         return ERROR_OK;
2028         }
2029
2030         for (i = 0; i+1 < argc; i += 2) {
2031                 ft2232_vid[i >> 1] = strtol(args[i], NULL, 0);
2032                 ft2232_pid[i >> 1] = strtol(args[i+1], NULL, 0);
2033         }
2034         /*
2035          * Explicitly terminate, in case there are multiples instances of
2036          * ft2232_vid_pid.
2037          */
2038         ft2232_vid[i >> 1] = ft2232_pid[i >> 1] = 0;
2039
2040         return ERROR_OK;
2041 }