git.sur5r.net Git - openocd/blob - src/jtag/ft2232.c

   1 /***************************************************************************
   2  *   Copyright (C) 2004, 2006 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #if IS_CYGWIN == 1
  28 #include "windows.h"
  29 #endif
  30
  31 #include "replacements.h"
  32
  33 /* project specific includes */
  34 #include "log.h"
  35 #include "types.h"
  36 #include "jtag.h"
  37 #include "configuration.h"
  38 #include "time_support.h"
  39
  40 /* system includes */
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <unistd.h>
  44
  45 /* FT2232 access library includes */
  46 #if BUILD_FT2232_FTD2XX == 1
  47 #include <ftd2xx.h>
  48 #elif BUILD_FT2232_LIBFTDI == 1
  49 #include <ftdi.h>
  50 #endif
  51
  52 /* enable this to debug io latency
  53  */
  54 #if 0
  55 #define _DEBUG_USB_IO_
  56 #endif
  57
  58 /* enable this to debug communication
  59  */
  60 #if 0
  61 #define _DEBUG_USB_COMMS_
  62 #endif
  63
  64 int ft2232_execute_queue(void);
  65
  66 int ft2232_speed(int speed);
  67 int ft2232_speed_div(int speed, int *khz);
  68 int ft2232_khz(int khz, int *jtag_speed);
  69 int ft2232_register_commands(struct command_context_s *cmd_ctx);
  70 int ft2232_init(void);
  71 int ft2232_quit(void);
  72
  73 int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  74 int ft2232_handle_serial_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  75 int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  76 int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  77 int ft2232_handle_latency_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  78
  79
  80 /**
  81  * Function ft2232_stableclocks
  82  * will send out \a num_cycles on the TCK line while the TAP(s)
  83  * are in a stable state.  Calling code must ensure that current state is
  84  * stable, that verification is not done in here.
  85  * @param num_cycles is the count of clocks cycles to send.
  86  * @return int - ERROR_OK or ERROR_JTAG_QUEUE_FAILED
  87  */
  88 static int ft2232_stableclocks(int num_cycles, jtag_command_t *cmd);
  89
  90
  91 char *ft2232_device_desc = NULL;
  92 char *ft2232_serial = NULL;
  93 char *ft2232_layout = NULL;
  94 unsigned char ft2232_latency = 2;
  95
  96 #define MAX_USB_IDS     8
  97 /* vid = pid = 0 marks the end of the list */
  98 static u16 ft2232_vid[MAX_USB_IDS+1] = { 0x0403, 0 };
  99 static u16 ft2232_pid[MAX_USB_IDS+1] = { 0x6010, 0 };
 100
 101 typedef struct ft2232_layout_s
 102 {
 103         char* name;
 104         int(*init)(void);
 105         void(*reset)(int trst, int srst);
 106         void(*blink)(void);
 107 } ft2232_layout_t;
 108
 109 /* init procedures for supported layouts */
 110 int usbjtag_init(void);
 111 int jtagkey_init(void);
 112 int olimex_jtag_init(void);
 113 int flyswatter_init(void);
 114 int turtle_init(void);
 115 int comstick_init(void);
 116 int stm32stick_init(void);
 117 int axm0432_jtag_init(void);
 118
 119 /* reset procedures for supported layouts */
 120 void usbjtag_reset(int trst, int srst);
 121 void jtagkey_reset(int trst, int srst);
 122 void olimex_jtag_reset(int trst, int srst);
 123 void flyswatter_reset(int trst, int srst);
 124 void turtle_reset(int trst, int srst);
 125 void comstick_reset(int trst, int srst);
 126 void stm32stick_reset(int trst, int srst);
 127 void axm0432_jtag_reset(int trst, int srst);
 128
 129 /* blink procedures for layouts that support a blinking led */
 130 void olimex_jtag_blink(void);
 131 void turtle_jtag_blink(void);
 132
 133 ft2232_layout_t ft2232_layouts[] =
 134 {
 135         {"usbjtag", usbjtag_init, usbjtag_reset, NULL},
 136         {"jtagkey", jtagkey_init, jtagkey_reset, NULL},
 137         {"jtagkey_prototype_v1", jtagkey_init, jtagkey_reset, NULL},
 138         {"oocdlink", jtagkey_init, jtagkey_reset, NULL},
 139         {"signalyzer", usbjtag_init, usbjtag_reset, NULL},
 140         {"evb_lm3s811", usbjtag_init, usbjtag_reset, NULL},
 141         {"olimex-jtag", olimex_jtag_init, olimex_jtag_reset, olimex_jtag_blink},
 142         {"flyswatter", flyswatter_init, flyswatter_reset, NULL},
 143         {"turtelizer2", turtle_init, turtle_reset, turtle_jtag_blink},
 144         {"comstick", comstick_init, comstick_reset, NULL},
 145         {"stm32stick", stm32stick_init, stm32stick_reset, NULL},
 146         {"axm0432_jtag", axm0432_jtag_init, axm0432_jtag_reset, NULL},
 147         {NULL, NULL, NULL},
 148 };
 149
 150 static u8 nTRST, nTRSTnOE, nSRST, nSRSTnOE;
 151
 152 static ft2232_layout_t *layout;
 153 static u8 low_output = 0x0;
 154 static u8 low_direction = 0x0;
 155 static u8 high_output = 0x0;
 156 static u8 high_direction = 0x0;
 157
 158 #if BUILD_FT2232_FTD2XX == 1
 159 static FT_HANDLE ftdih = NULL;
 160 #elif BUILD_FT2232_LIBFTDI == 1
 161 static struct ftdi_context ftdic;
 162 #endif
 163
 164
 165 static jtag_command_t *first_unsent;            /* next command that has to be sent */
 166 static int require_send;
 167
 168 static u8 *ft2232_buffer = NULL;
 169 static int ft2232_buffer_size = 0;
 170 static int ft2232_read_pointer = 0;
 171 static int ft2232_expect_read = 0;
 172
 173 #define FT2232_BUFFER_SIZE      131072
 174 #define BUFFER_ADD ft2232_buffer[ft2232_buffer_size++]
 175 #define BUFFER_READ ft2232_buffer[ft2232_read_pointer++]
 176
 177 jtag_interface_t ft2232_interface =
 178 {
 179         .name = "ft2232",
 180         .execute_queue = ft2232_execute_queue,
 181         .speed = ft2232_speed,
 182         .speed_div = ft2232_speed_div,
 183         .khz = ft2232_khz,
 184         .register_commands = ft2232_register_commands,
 185         .init = ft2232_init,
 186         .quit = ft2232_quit,
 187 };
 188
 189 int ft2232_write(u8 *buf, int size, u32* bytes_written)
 190 {
 191 #if BUILD_FT2232_FTD2XX == 1
 192         FT_STATUS status;
 193         DWORD dw_bytes_written;
 194         if ((status = FT_Write(ftdih, buf, size, &dw_bytes_written)) != FT_OK)
 195         {
 196                 *bytes_written = dw_bytes_written;
 197                 LOG_ERROR("FT_Write returned: %lu", status);
 198                 return ERROR_JTAG_DEVICE_ERROR;
 199         }
 200         else
 201         {
 202                 *bytes_written = dw_bytes_written;
 203                 return ERROR_OK;
 204         }
 205 #elif BUILD_FT2232_LIBFTDI == 1
 206         int retval;
 207         if ((retval = ftdi_write_data(&ftdic, buf, size)) < 0)
 208         {
 209                 *bytes_written = 0;
 210                 LOG_ERROR("ftdi_write_data: %s", ftdi_get_error_string(&ftdic));
 211                 return ERROR_JTAG_DEVICE_ERROR;
 212         }
 213         else
 214         {
 215                 *bytes_written = retval;
 216                 return ERROR_OK;
 217         }
 218 #endif
 219 }
 220
 221 int ft2232_read(u8* buf, int size, u32* bytes_read)
 222 {
 223 #if BUILD_FT2232_FTD2XX == 1
 224         DWORD dw_bytes_read;
 225         FT_STATUS status;
 226         int timeout = 5;
 227         *bytes_read = 0;
 228
 229         while ((*bytes_read < size) && timeout--)
 230         {
 231                 if ((status = FT_Read(ftdih, buf + *bytes_read, size -
 232                         *bytes_read, &dw_bytes_read)) != FT_OK)
 233                 {
 234                         *bytes_read = 0;
 235                         LOG_ERROR("FT_Read returned: %lu", status);
 236                         return ERROR_JTAG_DEVICE_ERROR;
 237                 }
 238                 *bytes_read += dw_bytes_read;
 239         }
 240 #elif BUILD_FT2232_LIBFTDI == 1
 241         int retval;
 242         int timeout = 100;
 243         *bytes_read = 0;
 244
 245         while ((*bytes_read < size) && timeout--)
 246         {
 247                 if ((retval = ftdi_read_data(&ftdic, buf + *bytes_read, size - *bytes_read)) < 0)
 248                 {
 249                         *bytes_read = 0;
 250                         LOG_ERROR("ftdi_read_data: %s", ftdi_get_error_string(&ftdic));
 251                         return ERROR_JTAG_DEVICE_ERROR;
 252                 }
 253                 *bytes_read += retval;
 254         }
 255 #endif
 256
 257         if (*bytes_read < size)
 258         {
 259                 LOG_ERROR("couldn't read the requested number of bytes from FT2232 device (%i < %i)", *bytes_read, size);
 260                 return ERROR_JTAG_DEVICE_ERROR;
 261         }
 262
 263         return ERROR_OK;
 264 }
 265
 266 int ft2232_speed(int speed)
 267 {
 268         u8 buf[3];
 269         int retval;
 270         u32 bytes_written;
 271
 272         buf[0] = 0x86; /* command "set divisor" */
 273         buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=2.0MHz, ...*/
 274         buf[2] = (speed >> 8) & 0xff; /* valueH */
 275
 276         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
 277         if (((retval = ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
 278         {
 279                 LOG_ERROR("couldn't set FT2232 TCK speed");
 280                 return retval;
 281         }
 282
 283         return ERROR_OK;
 284 }
 285
 286 int ft2232_speed_div(int speed, int *khz)
 287 {
 288         /* Take a look in the FT2232 manual,
 289          * AN2232C-01 Command Processor for
 290          * MPSSE and MCU Host Bus. Chapter 3.8 */
 291
 292         *khz = 6000 / (1+speed);
 293
 294         return ERROR_OK;
 295 }
 296
 297 int ft2232_khz(int khz, int *jtag_speed)
 298 {
 299         if (khz==0)
 300         {
 301                 LOG_ERROR("RCLK not supported");
 302                 return ERROR_FAIL;
 303         }
 304         /* Take a look in the FT2232 manual,
 305          * AN2232C-01 Command Processor for
 306          * MPSSE and MCU Host Bus. Chapter 3.8
 307          *
 308          * We will calc here with a multiplier
 309          * of 10 for better rounding later. */
 310
 311         /* Calc speed, (6000 / khz) - 1 */
 312         /* Use 65000 for better rounding */
 313         *jtag_speed = (60000 / khz) - 10;
 314
 315         /* Add 0.9 for rounding */
 316         *jtag_speed += 9;
 317
 318         /* Calc real speed */
 319         *jtag_speed = *jtag_speed / 10;
 320
 321         /* Check if speed is greater than 0 */
 322         if (*jtag_speed < 0)
 323         {
 324                 *jtag_speed = 0;
 325         }
 326
 327         /* Check max value */
 328         if (*jtag_speed > 0xFFFF)
 329         {
 330                 *jtag_speed = 0xFFFF;
 331         }
 332
 333         return ERROR_OK;
 334 }
 335
 336 int ft2232_register_commands(struct command_context_s *cmd_ctx)
 337 {
 338         register_command(cmd_ctx, NULL, "ft2232_device_desc", ft2232_handle_device_desc_command,
 339                 COMMAND_CONFIG, "the USB device description of the FTDI FT2232 device");
 340         register_command(cmd_ctx, NULL, "ft2232_serial", ft2232_handle_serial_command,
 341                 COMMAND_CONFIG, "the serial number of the FTDI FT2232 device");
 342         register_command(cmd_ctx, NULL, "ft2232_layout", ft2232_handle_layout_command,
 343                 COMMAND_CONFIG, "the layout of the FT2232 GPIO signals used to control output-enables and reset signals");
 344         register_command(cmd_ctx, NULL, "ft2232_vid_pid", ft2232_handle_vid_pid_command,
 345                                          COMMAND_CONFIG, "the vendor ID and product ID of the FTDI FT2232 device");
 346         register_command(cmd_ctx, NULL, "ft2232_latency", ft2232_handle_latency_command,
 347                                          COMMAND_CONFIG, "set the FT2232 latency timer to a new value");
 348         return ERROR_OK;
 349 }
 350
 351 void ft2232_end_state(enum tap_state state)
 352 {
 353         if (tap_move_map[state] != -1)
 354                 end_state = state;
 355         else
 356         {
 357                 LOG_ERROR("BUG: %i is not a valid end state", state);
 358                 exit(-1);
 359         }
 360 }
 361
 362 void ft2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
 363 {
 364         int num_bytes = (scan_size + 7) / 8;
 365         int bits_left = scan_size;
 366         int cur_byte = 0;
 367
 368         while(num_bytes-- > 1)
 369         {
 370                 buffer[cur_byte] = BUFFER_READ;
 371                 cur_byte++;
 372                 bits_left -= 8;
 373         }
 374
 375         buffer[cur_byte] = 0x0;
 376
 377         if (bits_left > 1)
 378         {
 379                 buffer[cur_byte] = BUFFER_READ >> 1;
 380         }
 381
 382         buffer[cur_byte] = (buffer[cur_byte] | ((BUFFER_READ & 0x02) << 6)) >> (8 - bits_left);
 383
 384 }
 385
 386 void ft2232_debug_dump_buffer(void)
 387 {
 388         int i;
 389         char line[256];
 390         char *line_p = line;
 391
 392         for (i = 0; i < ft2232_buffer_size; i++)
 393         {
 394                 line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ft2232_buffer[i]);
 395                 if (i % 16 == 15)
 396                 {
 397                         LOG_DEBUG("%s", line);
 398                         line_p = line;
 399                 }
 400         }
 401
 402         if (line_p != line)
 403                 LOG_DEBUG("%s", line);
 404 }
 405
 406 int ft2232_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 407 {
 408         jtag_command_t *cmd;
 409         u8 *buffer;
 410         int scan_size;
 411         enum scan_type type;
 412         int retval;
 413         u32 bytes_written;
 414         u32 bytes_read;
 415
 416 #ifdef _DEBUG_USB_IO_
 417         struct timeval start, inter, inter2, end;
 418         struct timeval d_inter, d_inter2, d_end;
 419 #endif
 420
 421 #ifdef _DEBUG_USB_COMMS_
 422         LOG_DEBUG("write buffer (size %i):", ft2232_buffer_size);
 423         ft2232_debug_dump_buffer();
 424 #endif
 425
 426 #ifdef _DEBUG_USB_IO_
 427         gettimeofday(&start, NULL);
 428 #endif
 429
 430         if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 431         {
 432                 LOG_ERROR("couldn't write MPSSE commands to FT2232");
 433                 return retval;
 434         }
 435
 436 #ifdef _DEBUG_USB_IO_
 437         gettimeofday(&inter, NULL);
 438 #endif
 439
 440         if (ft2232_expect_read)
 441         {
 442                 int timeout = 100;
 443                 ft2232_buffer_size = 0;
 444
 445 #ifdef _DEBUG_USB_IO_
 446                 gettimeofday(&inter2, NULL);
 447 #endif
 448
 449                 if ((retval = ft2232_read(ft2232_buffer, ft2232_expect_read, &bytes_read)) != ERROR_OK)
 450                 {
 451                         LOG_ERROR("couldn't read from FT2232");
 452                         return retval;
 453                 }
 454
 455 #ifdef _DEBUG_USB_IO_
 456                 gettimeofday(&end, NULL);
 457
 458                 timeval_subtract(&d_inter, &inter, &start);
 459                 timeval_subtract(&d_inter2, &inter2, &start);
 460                 timeval_subtract(&d_end, &end, &start);
 461
 462                 LOG_INFO("inter: %i.%06i, inter2: %i.%06i end: %i.%06i", d_inter.tv_sec, d_inter.tv_usec, d_inter2.tv_sec, d_inter2.tv_usec, d_end.tv_sec, d_end.tv_usec);
 463 #endif
 464
 465
 466                 ft2232_buffer_size = bytes_read;
 467
 468                 if (ft2232_expect_read != ft2232_buffer_size)
 469                 {
 470                         LOG_ERROR("ft2232_expect_read (%i) != ft2232_buffer_size (%i) (%i retries)", ft2232_expect_read, ft2232_buffer_size, 100 - timeout);
 471                         ft2232_debug_dump_buffer();
 472
 473                         exit(-1);
 474                 }
 475
 476 #ifdef _DEBUG_USB_COMMS_
 477                 LOG_DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ft2232_buffer_size);
 478                 ft2232_debug_dump_buffer();
 479 #endif
 480         }
 481
 482         ft2232_expect_read = 0;
 483         ft2232_read_pointer = 0;
 484
 485         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 486          * that wasn't handled by a caller-provided error handler
 487          */
 488         retval = ERROR_OK;
 489
 490         cmd = first;
 491         while (cmd != last)
 492         {
 493                 switch (cmd->type)
 494                 {
 495                         case JTAG_SCAN:
 496                                 type = jtag_scan_type(cmd->cmd.scan);
 497                                 if (type != SCAN_OUT)
 498                                 {
 499                                         scan_size = jtag_scan_size(cmd->cmd.scan);
 500                                         buffer = calloc(CEIL(scan_size, 8), 1);
 501                                         ft2232_read_scan(type, buffer, scan_size);
 502                                         if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 503                                                 retval = ERROR_JTAG_QUEUE_FAILED;
 504                                         free(buffer);
 505                                 }
 506                                 break;
 507                         default:
 508                                 break;
 509                 }
 510                 cmd = cmd->next;
 511         }
 512
 513         ft2232_buffer_size = 0;
 514
 515         return retval;
 516 }
 517
 518 void ft2232_add_pathmove(pathmove_command_t *cmd)
 519 {
 520         int num_states = cmd->num_states;
 521         u8 tms_byte;
 522         int state_count;
 523
 524         state_count = 0;
 525         while (num_states)
 526         {
 527                 int bit_count = 0;
 528
 529                 int num_states_batch = num_states > 7 ? 7 : num_states;
 530
 531                 tms_byte = 0x0;
 532                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 533                 BUFFER_ADD = 0x4b;
 534                 /* number of states remaining */
 535                 BUFFER_ADD = num_states_batch - 1;
 536
 537                 while (num_states_batch--)
 538                 {
 539                         if (tap_transitions[cur_state].low == cmd->path[state_count])
 540                                 buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
 541                         else if (tap_transitions[cur_state].high == cmd->path[state_count])
 542                                 buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
 543                         else
 544                         {
 545                                 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", jtag_state_name(cur_state), jtag_state_name(cmd->path[state_count]));
 546                                 exit(-1);
 547                         }
 548
 549                         cur_state = cmd->path[state_count];
 550                         state_count++;
 551                         num_states--;
 552                 }
 553
 554                 BUFFER_ADD = tms_byte;
 555         }
 556
 557         end_state = cur_state;
 558 }
 559
 560 void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 561 {
 562         int num_bytes = (scan_size + 7) / 8;
 563         int bits_left = scan_size;
 564         int cur_byte = 0;
 565         int last_bit;
 566
 567         if (!((!ir_scan && (cur_state == TAP_DRSHIFT)) || (ir_scan && (cur_state == TAP_IRSHIFT))))
 568         {
 569                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 570                 BUFFER_ADD = 0x4b;
 571                 /* scan 7 bit */
 572                 BUFFER_ADD = 0x6;
 573                 /* TMS data bits */
 574                 if (ir_scan)
 575                 {
 576                         BUFFER_ADD = TAP_MOVE(cur_state, TAP_IRSHIFT);
 577                         cur_state = TAP_IRSHIFT;
 578                 }
 579                 else
 580                 {
 581                         BUFFER_ADD = TAP_MOVE(cur_state, TAP_DRSHIFT);
 582                         cur_state = TAP_DRSHIFT;
 583                 }
 584                 /* LOG_DEBUG("added TMS scan (no read)"); */
 585         }
 586
 587         /* add command for complete bytes */
 588         while (num_bytes > 1)
 589         {
 590                 int thisrun_bytes;
 591                 if (type == SCAN_IO)
 592                 {
 593                         /* Clock Data Bytes In and Out LSB First */
 594                         BUFFER_ADD = 0x39;
 595                         /* LOG_DEBUG("added TDI bytes (io %i)", num_bytes); */
 596                 }
 597                 else if (type == SCAN_OUT)
 598                 {
 599                         /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
 600                         BUFFER_ADD = 0x19;
 601                         /* LOG_DEBUG("added TDI bytes (o)"); */
 602                 }
 603                 else if (type == SCAN_IN)
 604                 {
 605                         /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
 606                         BUFFER_ADD = 0x28;
 607                         /* LOG_DEBUG("added TDI bytes (i %i)", num_bytes); */
 608                 }
 609                 thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
 610                 num_bytes -= thisrun_bytes;
 611                 BUFFER_ADD = (thisrun_bytes - 1) & 0xff;
 612                 BUFFER_ADD = ((thisrun_bytes - 1) >> 8) & 0xff;
 613                 if (type != SCAN_IN)
 614                 {
 615                         /* add complete bytes */
 616                         while(thisrun_bytes-- > 0)
 617                         {
 618                                 BUFFER_ADD = buffer[cur_byte];
 619                                 cur_byte++;
 620                                 bits_left -= 8;
 621                         }
 622                 }
 623                 else /* (type == SCAN_IN) */
 624                 {
 625                         bits_left -= 8 * (thisrun_bytes);
 626                 }
 627         }
 628
 629         /* the most signifcant bit is scanned during TAP movement */
 630         if (type != SCAN_IN)
 631                 last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1;
 632         else
 633                 last_bit = 0;
 634
 635         /* process remaining bits but the last one */
 636         if (bits_left > 1)
 637         {
 638                 if (type == SCAN_IO)
 639                 {
 640                         /* Clock Data Bits In and Out LSB First */
 641                         BUFFER_ADD = 0x3b;
 642                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 643                 }
 644                 else if (type == SCAN_OUT)
 645                 {
 646                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 647                         BUFFER_ADD = 0x1b;
 648                         /* LOG_DEBUG("added TDI bits (o)"); */
 649                 }
 650                 else if (type == SCAN_IN)
 651                 {
 652                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 653                         BUFFER_ADD = 0x2a;
 654                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 655                 }
 656                 BUFFER_ADD = bits_left - 2;
 657                 if (type != SCAN_IN)
 658                         BUFFER_ADD = buffer[cur_byte];
 659         }
 660
 661         if ((ir_scan && (end_state == TAP_IRSHIFT)) ||
 662                 (!ir_scan && (end_state == TAP_DRSHIFT)))
 663         {
 664                 if (type == SCAN_IO)
 665                 {
 666                         /* Clock Data Bits In and Out LSB First */
 667                         BUFFER_ADD = 0x3b;
 668                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 669                 }
 670                 else if (type == SCAN_OUT)
 671                 {
 672                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 673                         BUFFER_ADD = 0x1b;
 674                         /* LOG_DEBUG("added TDI bits (o)"); */
 675                 }
 676                 else if (type == SCAN_IN)
 677                 {
 678                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 679                         BUFFER_ADD = 0x2a;
 680                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 681                 }
 682                 BUFFER_ADD = 0x0;
 683                 BUFFER_ADD = last_bit;
 684         }
 685         else
 686         {
 687                 /* move from Shift-IR/DR to end state */
 688                 if (type != SCAN_OUT)
 689                 {
 690                         /* Clock Data to TMS/CS Pin with Read */
 691                         BUFFER_ADD = 0x6b;
 692                         /* LOG_DEBUG("added TMS scan (read)"); */
 693                 }
 694                 else
 695                 {
 696                         /* Clock Data to TMS/CS Pin (no Read) */
 697                         BUFFER_ADD = 0x4b;
 698                         /* LOG_DEBUG("added TMS scan (no read)"); */
 699                 }
 700                 BUFFER_ADD = 0x6;
 701                 BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7);
 702                 cur_state = end_state;
 703         }
 704 }
 705
 706 int ft2232_large_scan(scan_command_t *cmd, enum scan_type type, u8 *buffer, int scan_size)
 707 {
 708         int num_bytes = (scan_size + 7) / 8;
 709         int bits_left = scan_size;
 710         int cur_byte = 0;
 711         int last_bit;
 712         u8 *receive_buffer = malloc(CEIL(scan_size, 8));
 713         u8 *receive_pointer = receive_buffer;
 714         u32 bytes_written;
 715         u32 bytes_read;
 716         int retval;
 717         int thisrun_read = 0;
 718
 719         if (cmd->ir_scan)
 720         {
 721                 LOG_ERROR("BUG: large IR scans are not supported");
 722                 exit(-1);
 723         }
 724
 725         if (cur_state != TAP_DRSHIFT)
 726         {
 727                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 728                 BUFFER_ADD = 0x4b;
 729                 /* scan 7 bit */
 730                 BUFFER_ADD = 0x6;
 731                 /* TMS data bits */
 732                 BUFFER_ADD = TAP_MOVE(cur_state, TAP_DRSHIFT);
 733                 cur_state = TAP_DRSHIFT;
 734         }
 735
 736         if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 737         {
 738                 LOG_ERROR("couldn't write MPSSE commands to FT2232");
 739                 exit(-1);
 740         }
 741         LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 742         ft2232_buffer_size = 0;
 743
 744         /* add command for complete bytes */
 745         while (num_bytes > 1)
 746         {
 747                 int thisrun_bytes;
 748
 749                 if (type == SCAN_IO)
 750                 {
 751                         /* Clock Data Bytes In and Out LSB First */
 752                         BUFFER_ADD = 0x39;
 753                         /* LOG_DEBUG("added TDI bytes (io %i)", num_bytes); */
 754                 }
 755                 else if (type == SCAN_OUT)
 756                 {
 757                         /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
 758                         BUFFER_ADD = 0x19;
 759                         /* LOG_DEBUG("added TDI bytes (o)"); */
 760                 }
 761                 else if (type == SCAN_IN)
 762                 {
 763                         /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
 764                         BUFFER_ADD = 0x28;
 765                         /* LOG_DEBUG("added TDI bytes (i %i)", num_bytes); */
 766                 }
 767                 thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
 768                 thisrun_read = thisrun_bytes;
 769                 num_bytes -= thisrun_bytes;
 770                 BUFFER_ADD = (thisrun_bytes - 1) & 0xff;
 771                 BUFFER_ADD = ((thisrun_bytes - 1) >> 8) & 0xff;
 772                 if (type != SCAN_IN)
 773                 {
 774                         /* add complete bytes */
 775                         while(thisrun_bytes-- > 0)
 776                         {
 777                                 BUFFER_ADD = buffer[cur_byte];
 778                                 cur_byte++;
 779                                 bits_left -= 8;
 780                         }
 781                 }
 782                 else /* (type == SCAN_IN) */
 783                 {
 784                         bits_left -= 8 * (thisrun_bytes);
 785                 }
 786
 787                 if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 788                 {
 789                         LOG_ERROR("couldn't write MPSSE commands to FT2232");
 790                         exit(-1);
 791                 }
 792                 LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 793                 ft2232_buffer_size = 0;
 794
 795                 if (type != SCAN_OUT)
 796                 {
 797                         if ((retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read)) != ERROR_OK)
 798                         {
 799                                 LOG_ERROR("couldn't read from FT2232");
 800                                 exit(-1);
 801                         }
 802                         LOG_DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
 803                         receive_pointer += bytes_read;
 804                 }
 805         }
 806
 807         thisrun_read = 0;
 808
 809         /* the most signifcant bit is scanned during TAP movement */
 810         if (type != SCAN_IN)
 811                 last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1;
 812         else
 813                 last_bit = 0;
 814
 815         /* process remaining bits but the last one */
 816         if (bits_left > 1)
 817         {
 818                 if (type == SCAN_IO)
 819                 {
 820                         /* Clock Data Bits In and Out LSB First */
 821                         BUFFER_ADD = 0x3b;
 822                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 823                 }
 824                 else if (type == SCAN_OUT)
 825                 {
 826                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 827                         BUFFER_ADD = 0x1b;
 828                         /* LOG_DEBUG("added TDI bits (o)"); */
 829                 }
 830                 else if (type == SCAN_IN)
 831                 {
 832                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 833                         BUFFER_ADD = 0x2a;
 834                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 835                 }
 836                 BUFFER_ADD = bits_left - 2;
 837                 if (type != SCAN_IN)
 838                         BUFFER_ADD = buffer[cur_byte];
 839
 840                 if (type != SCAN_OUT)
 841                         thisrun_read += 2;
 842         }
 843
 844         if (end_state == TAP_DRSHIFT)
 845         {
 846                 if (type == SCAN_IO)
 847                 {
 848                         /* Clock Data Bits In and Out LSB First */
 849                         BUFFER_ADD = 0x3b;
 850                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 851                 }
 852                 else if (type == SCAN_OUT)
 853                 {
 854                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 855                         BUFFER_ADD = 0x1b;
 856                         /* LOG_DEBUG("added TDI bits (o)"); */
 857                 }
 858                 else if (type == SCAN_IN)
 859                 {
 860                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 861                         BUFFER_ADD = 0x2a;
 862                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 863                 }
 864                 BUFFER_ADD = 0x0;
 865                 BUFFER_ADD = last_bit;
 866         }
 867         else
 868         {
 869                 /* move from Shift-IR/DR to end state */
 870                 if (type != SCAN_OUT)
 871                 {
 872                         /* Clock Data to TMS/CS Pin with Read */
 873                         BUFFER_ADD = 0x6b;
 874                         /* LOG_DEBUG("added TMS scan (read)"); */
 875                 }
 876                 else
 877                 {
 878                         /* Clock Data to TMS/CS Pin (no Read) */
 879                         BUFFER_ADD = 0x4b;
 880                         /* LOG_DEBUG("added TMS scan (no read)"); */
 881                 }
 882                 BUFFER_ADD = 0x6;
 883                 BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7);
 884                 cur_state = end_state;
 885         }
 886
 887         if (type != SCAN_OUT)
 888                 thisrun_read += 1;
 889
 890         if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 891         {
 892                 LOG_ERROR("couldn't write MPSSE commands to FT2232");
 893                 exit(-1);
 894         }
 895         LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 896         ft2232_buffer_size = 0;
 897
 898         if (type != SCAN_OUT)
 899         {
 900                 if ((retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read)) != ERROR_OK)
 901                 {
 902                         LOG_ERROR("couldn't read from FT2232");
 903                         exit(-1);
 904                 }
 905                 LOG_DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
 906                 receive_pointer += bytes_read;
 907         }
 908
 909         return ERROR_OK;
 910 }
 911
 912 int ft2232_predict_scan_out(int scan_size, enum scan_type type)
 913 {
 914         int predicted_size = 3;
 915         int num_bytes = (scan_size - 1) / 8;
 916
 917         if (cur_state != TAP_DRSHIFT)
 918                 predicted_size += 3;
 919
 920         if (type == SCAN_IN)    /* only from device to host */
 921         {
 922                 /* complete bytes */
 923                 predicted_size += CEIL(num_bytes, 65536) * 3;
 924                 /* remaining bits - 1 (up to 7) */
 925                 predicted_size += ((scan_size - 1) % 8) ? 2 : 0;
 926         }
 927         else                                    /* host to device, or bidirectional */
 928         {
 929                 /* complete bytes */
 930                 predicted_size += num_bytes + CEIL(num_bytes, 65536) * 3;
 931                 /* remaining bits -1 (up to 7) */
 932                 predicted_size += ((scan_size - 1) % 8) ? 3 : 0;
 933         }
 934
 935         return predicted_size;
 936 }
 937
 938 int ft2232_predict_scan_in(int scan_size, enum scan_type type)
 939 {
 940         int predicted_size = 0;
 941
 942         if (type != SCAN_OUT)
 943         {
 944                 /* complete bytes */
 945                 predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) - 1) : 0;
 946                 /* remaining bits - 1 */
 947                 predicted_size += ((scan_size - 1) % 8) ? 1 : 0;
 948                 /* last bit (from TMS scan) */
 949                 predicted_size += 1;
 950         }
 951
 952         /* LOG_DEBUG("scan_size: %i, predicted_size: %i", scan_size, predicted_size); */
 953
 954         return predicted_size;
 955 }
 956
 957 void usbjtag_reset(int trst, int srst)
 958 {
 959         if (trst == 1)
 960         {
 961                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 962                         low_direction |= nTRSTnOE;      /* switch to output pin (output is low) */
 963                 else
 964                         low_output &= ~nTRST;   /* switch output low */
 965         }
 966         else if (trst == 0)
 967         {
 968                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 969                         low_direction &= ~nTRSTnOE; /* switch to input pin (high-Z + internal and external pullup) */
 970                 else
 971                         low_output |= nTRST; /* switch output high */
 972         }
 973
 974         if (srst == 1)
 975         {
 976                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 977                         low_output &= ~nSRST;   /* switch output low */
 978                 else
 979                         low_direction |= nSRSTnOE;      /* switch to output pin (output is low) */
 980         }
 981         else if (srst == 0)
 982         {
 983                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 984                         low_output |= nSRST;    /* switch output high */
 985                 else
 986                         low_direction &= ~nSRSTnOE;     /* switch to input pin (high-Z) */
 987         }
 988
 989         /* command "set data bits low byte" */
 990         BUFFER_ADD = 0x80;
 991         BUFFER_ADD = low_output;
 992         BUFFER_ADD = low_direction;
 993
 994 }
 995
 996 void jtagkey_reset(int trst, int srst)
 997 {
 998         if (trst == 1)
 999         {
1000                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1001                         high_output &= ~nTRSTnOE;
1002                 else
1003                         high_output &= ~nTRST;
1004         }
1005         else if (trst == 0)
1006         {
1007                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1008                         high_output |= nTRSTnOE;
1009                 else
1010                         high_output |= nTRST;
1011         }
1012
1013         if (srst == 1)
1014         {
1015                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1016                         high_output &= ~nSRST;
1017                 else
1018                         high_output &= ~nSRSTnOE;
1019         }
1020         else if (srst == 0)
1021         {
1022                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1023                         high_output |= nSRST;
1024                 else
1025                         high_output |= nSRSTnOE;
1026         }
1027
1028         /* command "set data bits high byte" */
1029         BUFFER_ADD = 0x82;
1030         BUFFER_ADD = high_output;
1031         BUFFER_ADD = high_direction;
1032         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1033 }
1034
1035 void olimex_jtag_reset(int trst, int srst)
1036 {
1037         if (trst == 1)
1038         {
1039                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1040                         high_output &= ~nTRSTnOE;
1041                 else
1042                         high_output &= ~nTRST;
1043         }
1044         else if (trst == 0)
1045         {
1046                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1047                         high_output |= nTRSTnOE;
1048                 else
1049                         high_output |= nTRST;
1050         }
1051
1052         if (srst == 1)
1053         {
1054                 high_output |= nSRST;
1055         }
1056         else if (srst == 0)
1057         {
1058                 high_output &= ~nSRST;
1059         }
1060
1061         /* command "set data bits high byte" */
1062         BUFFER_ADD = 0x82;
1063         BUFFER_ADD = high_output;
1064         BUFFER_ADD = high_direction;
1065         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1066 }
1067
1068 void axm0432_jtag_reset(int trst, int srst)
1069 {
1070         if (trst == 1)
1071         {
1072                 cur_state = TAP_RESET;
1073                 high_output &= ~nTRST;
1074         }
1075         else if (trst == 0)
1076         {
1077                 high_output |= nTRST;
1078         }
1079
1080         if (srst == 1)
1081         {
1082                 high_output &= ~nSRST;
1083         }
1084         else if (srst == 0)
1085         {
1086                 high_output |= nSRST;
1087         }
1088
1089         /* command "set data bits low byte" */
1090         BUFFER_ADD = 0x82;
1091         BUFFER_ADD = high_output;
1092         BUFFER_ADD = high_direction;
1093         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1094 }
1095
1096 void flyswatter_reset(int trst, int srst)
1097 {
1098         if (trst == 1)
1099         {
1100                 low_output &= ~nTRST;
1101         }
1102         else if (trst == 0)
1103         {
1104                 low_output |= nTRST;
1105         }
1106
1107         if (srst == 1)
1108         {
1109                 low_output |= nSRST;
1110         }
1111         else if (srst == 0)
1112         {
1113                 low_output &= ~nSRST;
1114         }
1115
1116         /* command "set data bits low byte" */
1117         BUFFER_ADD = 0x80;
1118         BUFFER_ADD = low_output;
1119         BUFFER_ADD = low_direction;
1120         LOG_DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", trst, srst, low_output, low_direction);
1121 }
1122
1123 void turtle_reset(int trst, int srst)
1124 {
1125         trst = trst;
1126
1127         if (srst == 1)
1128         {
1129                 low_output |= nSRST;
1130         }
1131         else if (srst == 0)
1132         {
1133                 low_output &= ~nSRST;
1134         }
1135
1136         /* command "set data bits low byte" */
1137         BUFFER_ADD = 0x80;
1138         BUFFER_ADD = low_output;
1139         BUFFER_ADD = low_direction;
1140         LOG_DEBUG("srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", srst, low_output, low_direction);
1141 }
1142
1143 void comstick_reset(int trst, int srst)
1144 {
1145         if (trst == 1)
1146         {
1147                 high_output &= ~nTRST;
1148         }
1149         else if (trst == 0)
1150         {
1151                 high_output |= nTRST;
1152         }
1153
1154         if (srst == 1)
1155         {
1156                 high_output &= ~nSRST;
1157         }
1158         else if (srst == 0)
1159         {
1160                 high_output |= nSRST;
1161         }
1162
1163         /* command "set data bits high byte" */
1164         BUFFER_ADD = 0x82;
1165         BUFFER_ADD = high_output;
1166         BUFFER_ADD = high_direction;
1167         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1168 }
1169
1170 void stm32stick_reset(int trst, int srst)
1171 {
1172         if (trst == 1)
1173         {
1174                 high_output &= ~nTRST;
1175         }
1176         else if (trst == 0)
1177         {
1178                 high_output |= nTRST;
1179         }
1180
1181         if (srst == 1)
1182         {
1183                 low_output &= ~nSRST;
1184         }
1185         else if (srst == 0)
1186         {
1187                 low_output |= nSRST;
1188         }
1189
1190         /* command "set data bits low byte" */
1191         BUFFER_ADD = 0x80;
1192         BUFFER_ADD = low_output;
1193         BUFFER_ADD = low_direction;
1194
1195         /* command "set data bits high byte" */
1196         BUFFER_ADD = 0x82;
1197         BUFFER_ADD = high_output;
1198         BUFFER_ADD = high_direction;
1199         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1200 }
1201
1202 int ft2232_execute_queue()
1203 {
1204         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
1205         u8 *buffer;
1206         int scan_size;  /* size of IR or DR scan */
1207         enum scan_type type;
1208         int i;
1209         int predicted_size = 0;
1210         int retval;
1211
1212         first_unsent = cmd;                     /* next command that has to be sent */
1213         require_send = 0;
1214
1215         /* return ERROR_OK, unless ft2232_send_and_recv reports a failed check
1216          * that wasn't handled by a caller-provided error handler
1217          */
1218         retval = ERROR_OK;
1219
1220         ft2232_buffer_size = 0;
1221         ft2232_expect_read = 0;
1222
1223         /* blink, if the current layout has that feature */
1224         if (layout->blink)
1225                 layout->blink();
1226
1227         while (cmd)
1228         {
1229                 switch(cmd->type)
1230                 {
1231                         case JTAG_END_STATE:
1232                                 if (cmd->cmd.end_state->end_state != -1)
1233                                         ft2232_end_state(cmd->cmd.end_state->end_state);
1234                                 break;
1235
1236                         case JTAG_RESET:
1237                                 /* only send the maximum buffer size that FT2232C can handle */
1238                                 predicted_size = 3;
1239                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1240                                 {
1241                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1242                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1243                                         require_send = 0;
1244                                         first_unsent = cmd;
1245                                 }
1246
1247                                 if ((cmd->cmd.reset->trst == 1) || (cmd->cmd.reset->srst && (jtag_reset_config & RESET_SRST_PULLS_TRST)))
1248                                 {
1249                                         cur_state = TAP_RESET;
1250                                 }
1251                                 layout->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
1252                                 require_send = 1;
1253
1254 #ifdef _DEBUG_JTAG_IO_
1255                                 LOG_DEBUG("trst: %i, srst: %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
1256 #endif
1257                                 break;
1258
1259                         case JTAG_RUNTEST:
1260                                 /* only send the maximum buffer size that FT2232C can handle */
1261                                 predicted_size = 0;
1262                                 if (cur_state != TAP_IDLE)
1263                                         predicted_size += 3;
1264                                 predicted_size += 3 * CEIL(cmd->cmd.runtest->num_cycles, 7);
1265                                 if ((cmd->cmd.runtest->end_state != -1) && (cmd->cmd.runtest->end_state != TAP_IDLE))
1266                                         predicted_size += 3;
1267                                 if ((cmd->cmd.runtest->end_state == -1) && (end_state != TAP_IDLE))
1268                                         predicted_size += 3;
1269                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1270                                 {
1271                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1272                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1273                                         require_send = 0;
1274                                         first_unsent = cmd;
1275                                 }
1276                                 if (cur_state != TAP_IDLE)
1277                                 {
1278                                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1279                                         BUFFER_ADD = 0x4b;
1280                                         /* scan 7 bit */
1281                                         BUFFER_ADD = 0x6;
1282                                         /* TMS data bits */
1283                                         BUFFER_ADD = TAP_MOVE(cur_state, TAP_IDLE);
1284                                         cur_state = TAP_IDLE;
1285                                         require_send = 1;
1286                                 }
1287                                 i = cmd->cmd.runtest->num_cycles;
1288                                 while (i > 0)
1289                                 {
1290                                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1291                                         BUFFER_ADD = 0x4b;
1292                                         /* scan 7 bit */
1293                                         BUFFER_ADD = (i > 7) ? 6 : (i - 1);
1294                                         /* TMS data bits */
1295                                         BUFFER_ADD = 0x0;
1296                                         cur_state = TAP_IDLE;
1297                                         i -= (i > 7) ? 7 : i;
1298                                         /* LOG_DEBUG("added TMS scan (no read)"); */
1299                                 }
1300                                 if (cmd->cmd.runtest->end_state != -1)
1301                                         ft2232_end_state(cmd->cmd.runtest->end_state);
1302                                 if (cur_state != end_state)
1303                                 {
1304                                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1305                                         BUFFER_ADD = 0x4b;
1306                                         /* scan 7 bit */
1307                                         BUFFER_ADD = 0x6;
1308                                         /* TMS data bits */
1309                                         BUFFER_ADD = TAP_MOVE(cur_state, end_state);
1310                                         cur_state = end_state;
1311                                         /* LOG_DEBUG("added TMS scan (no read)"); */
1312                                 }
1313                                 require_send = 1;
1314 #ifdef _DEBUG_JTAG_IO_
1315                                 LOG_DEBUG("runtest: %i, end in %s", cmd->cmd.runtest->num_cycles, jtag_state_name(end_state));
1316 #endif
1317                                 break;
1318
1319                         case JTAG_STATEMOVE:
1320                                 /* only send the maximum buffer size that FT2232C can handle */
1321                                 predicted_size = 3;
1322                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1323                                 {
1324                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1325                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1326                                         require_send = 0;
1327                                         first_unsent = cmd;
1328                                 }
1329                                 if (cmd->cmd.statemove->end_state != -1)
1330                                         ft2232_end_state(cmd->cmd.statemove->end_state);
1331                                 /* command "Clock Data to TMS/CS Pin (no Read)" */
1332                                 BUFFER_ADD = 0x4b;
1333                                 /* scan 7 bit */
1334                                 BUFFER_ADD = 0x6;
1335                                 /* TMS data bits */
1336                                 BUFFER_ADD = TAP_MOVE(cur_state, end_state);
1337                                 /* LOG_DEBUG("added TMS scan (no read)"); */
1338                                 cur_state = end_state;
1339                                 require_send = 1;
1340 #ifdef _DEBUG_JTAG_IO_
1341                                 LOG_DEBUG("statemove: %s", jtag_state_name(end_state));
1342 #endif
1343                                 break;
1344
1345                         case JTAG_PATHMOVE:
1346                                 /* only send the maximum buffer size that FT2232C can handle */
1347                                 predicted_size = 3 * CEIL(cmd->cmd.pathmove->num_states, 7);
1348                                 if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1349                                 {
1350                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1351                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1352                                         require_send = 0;
1353                                         first_unsent = cmd;
1354                                 }
1355                                 ft2232_add_pathmove(cmd->cmd.pathmove);
1356                                 require_send = 1;
1357 #ifdef _DEBUG_JTAG_IO_
1358                                 LOG_DEBUG("pathmove: %i states, end in %s", cmd->cmd.pathmove->num_states,
1359                                         jtag_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
1360 #endif
1361                                 break;
1362
1363                         case JTAG_SCAN:
1364                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
1365                                 type = jtag_scan_type(cmd->cmd.scan);
1366                                 predicted_size = ft2232_predict_scan_out(scan_size, type);
1367                                 if ((predicted_size + 1) > FT2232_BUFFER_SIZE)
1368                                 {
1369                                         LOG_DEBUG("oversized ft2232 scan (predicted_size > FT2232_BUFFER_SIZE)");
1370                                         /* unsent commands before this */
1371                                         if (first_unsent != cmd)
1372                                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1373                                                         retval = ERROR_JTAG_QUEUE_FAILED;
1374
1375                                         /* current command */
1376                                         if (cmd->cmd.scan->end_state != -1)
1377                                                 ft2232_end_state(cmd->cmd.scan->end_state);
1378                                         ft2232_large_scan(cmd->cmd.scan, type, buffer, scan_size);
1379                                         require_send = 0;
1380                                         first_unsent = cmd->next;
1381                                         if (buffer)
1382                                                 free(buffer);
1383                                         break;
1384                                 }
1385                                 else if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1386                                 {
1387                                         LOG_DEBUG("ft2232 buffer size reached, sending queued commands (first_unsent: %p, cmd: %p)", first_unsent, cmd);
1388                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1389                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1390                                         require_send = 0;
1391                                         first_unsent = cmd;
1392                                 }
1393                                 ft2232_expect_read += ft2232_predict_scan_in(scan_size, type);
1394                                 /* LOG_DEBUG("new read size: %i", ft2232_expect_read); */
1395                                 if (cmd->cmd.scan->end_state != -1)
1396                                         ft2232_end_state(cmd->cmd.scan->end_state);
1397                                 ft2232_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
1398                                 require_send = 1;
1399                                 if (buffer)
1400                                         free(buffer);
1401 #ifdef _DEBUG_JTAG_IO_
1402                                 LOG_DEBUG("%s scan, %i bits, end in %s", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
1403                                         jtag_state_name(end_state));
1404 #endif
1405                                 break;
1406
1407                         case JTAG_SLEEP:
1408                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1409                                         retval = ERROR_JTAG_QUEUE_FAILED;
1410                                 first_unsent = cmd->next;
1411                                 jtag_sleep(cmd->cmd.sleep->us);
1412 #ifdef _DEBUG_JTAG_IO_
1413                                 LOG_DEBUG("sleep %i usec while in %s", cmd->cmd.sleep->us, jtag_state_name(cur_state));
1414 #endif
1415                                 break;
1416
1417                         case JTAG_STABLECLOCKS:
1418                                 /* "if (tap_move_map[cur_state] != -1)" is of no help when cur_state==TAP_IDLE */
1419                                 switch(cur_state)
1420                                 {
1421                                 case TAP_DRSHIFT:
1422                                 case TAP_IDLE:
1423                                 case TAP_RESET:
1424                                 case TAP_DRPAUSE:
1425                                 case TAP_IRSHIFT:
1426                                 case TAP_IRPAUSE:
1427                                          break;                 /* above stable states are OK */
1428                                 default:
1429                                          LOG_ERROR( "jtag_add_clocks() was called with TAP in non-stable state \"%s\"",
1430                                                          jtag_state_name(cur_state) );
1431                                          retval = ERROR_JTAG_QUEUE_FAILED;
1432                                 }
1433
1434                                 if (ft2232_stableclocks(cmd->cmd.stableclocks->num_cycles, cmd) != ERROR_OK)
1435                                         retval = ERROR_JTAG_QUEUE_FAILED;
1436 #ifdef _DEBUG_JTAG_IO_
1437                                 LOG_DEBUG("clocks %i while in %s", cmd->cmd.stableclocks->num_cycles, jtag_state_name(cur_state));
1438 #endif
1439                                 break;
1440
1441                         default:
1442                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
1443                                 exit(-1);
1444                 }
1445                 cmd = cmd->next;
1446         }
1447
1448         if (require_send > 0)
1449                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1450                         retval = ERROR_JTAG_QUEUE_FAILED;
1451
1452         return retval;
1453 }
1454
1455 #if BUILD_FT2232_FTD2XX == 1
1456 static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int *try_more)
1457 {
1458         FT_STATUS status;
1459         DWORD openex_flags = 0;
1460         char *openex_string = NULL;
1461         u8 latency_timer;
1462
1463         LOG_DEBUG("'ft2232' interface using FTD2XX with '%s' layout (%4.4x:%4.4x)",ft2232_layout, vid, pid);
1464
1465 #if IS_WIN32 == 0
1466         /* Add non-standard Vid/Pid to the linux driver */
1467         if ((status = FT_SetVIDPID(vid, pid)) != FT_OK)
1468         {
1469                 LOG_WARNING("couldn't add %4.4x:%4.4x", vid, pid);
1470         }
1471 #endif
1472
1473         if (ft2232_device_desc && ft2232_serial)
1474         {
1475                 LOG_WARNING("can't open by device description and serial number, giving precedence to serial");
1476                 ft2232_device_desc = NULL;
1477         }
1478
1479         if (ft2232_device_desc)
1480         {
1481                 openex_string = ft2232_device_desc;
1482                 openex_flags = FT_OPEN_BY_DESCRIPTION;
1483         }
1484         else if (ft2232_serial)
1485         {
1486                 openex_string = ft2232_serial;
1487                 openex_flags = FT_OPEN_BY_SERIAL_NUMBER;
1488         }
1489         else
1490         {
1491                 LOG_ERROR("neither device description nor serial number specified");
1492                 LOG_ERROR("please add \"ft2232_device_desc <string>\" or \"ft2232_serial <string>\" to your .cfg file");
1493
1494                 return ERROR_JTAG_INIT_FAILED;
1495         }
1496
1497         if ((status = FT_OpenEx(openex_string, openex_flags, &ftdih)) != FT_OK)
1498         {
1499                 DWORD num_devices;
1500
1501                 if (more) {
1502                         LOG_WARNING("unable to open ftdi device (trying more): %lu", status);
1503                         *try_more = 1;
1504                         return ERROR_JTAG_INIT_FAILED;
1505                 }
1506                 LOG_ERROR("unable to open ftdi device: %lu", status);
1507                 status = FT_ListDevices(&num_devices, NULL, FT_LIST_NUMBER_ONLY);
1508                 if (status == FT_OK)
1509                 {
1510                         char **desc_array = malloc(sizeof(char*) * (num_devices + 1));
1511                         int i;
1512
1513                         for (i = 0; i < num_devices; i++)
1514                                 desc_array[i] = malloc(64);
1515                         desc_array[num_devices] = NULL;
1516
1517                         status = FT_ListDevices(desc_array, &num_devices, FT_LIST_ALL | openex_flags);
1518
1519                         if (status == FT_OK)
1520                         {
1521                                 LOG_ERROR("ListDevices: %lu\n", num_devices);
1522                                 for (i = 0; i < num_devices; i++)
1523                                         LOG_ERROR("%i: \"%s\"", i, desc_array[i]);
1524                         }
1525
1526                         for (i = 0; i < num_devices; i++)
1527                                 free(desc_array[i]);
1528                         free(desc_array);
1529                 }
1530                 else
1531                 {
1532                         LOG_ERROR("ListDevices: NONE\n");
1533                 }
1534                 return ERROR_JTAG_INIT_FAILED;
1535         }
1536
1537         if ((status = FT_SetLatencyTimer(ftdih, ft2232_latency)) != FT_OK)
1538         {
1539                 LOG_ERROR("unable to set latency timer: %lu", status);
1540                 return ERROR_JTAG_INIT_FAILED;
1541         }
1542
1543         if ((status = FT_GetLatencyTimer(ftdih, &latency_timer)) != FT_OK)
1544         {
1545                 LOG_ERROR("unable to get latency timer: %lu", status);
1546                 return ERROR_JTAG_INIT_FAILED;
1547         }
1548         else
1549         {
1550                 LOG_DEBUG("current latency timer: %i", latency_timer);
1551         }
1552
1553         if ((status = FT_SetTimeouts(ftdih, 5000, 5000)) != FT_OK)
1554         {
1555                 LOG_ERROR("unable to set timeouts: %lu", status);
1556                 return ERROR_JTAG_INIT_FAILED;
1557         }
1558
1559         if ((status = FT_SetBitMode(ftdih, 0x0b, 2)) != FT_OK)
1560         {
1561                 LOG_ERROR("unable to enable bit i/o mode: %lu", status);
1562                 return ERROR_JTAG_INIT_FAILED;
1563         }
1564
1565         return ERROR_OK;
1566 }
1567
1568 static int ft2232_purge_ftd2xx(void)
1569 {
1570         FT_STATUS status;
1571
1572         if ((status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK)
1573         {
1574                 LOG_ERROR("error purging ftd2xx device: %lu", status);
1575                 return ERROR_JTAG_INIT_FAILED;
1576         }
1577
1578         return ERROR_OK;
1579 }
1580 #endif /* BUILD_FT2232_FTD2XX == 1 */
1581
1582 #if BUILD_FT2232_LIBFTDI == 1
1583 static int ft2232_init_libftdi(u16 vid, u16 pid, int more, int *try_more)
1584 {
1585         u8 latency_timer;
1586
1587         LOG_DEBUG("'ft2232' interface using libftdi with '%s' layout (%4.4x:%4.4x)",
1588                 ft2232_layout, vid, pid);
1589
1590         if (ftdi_init(&ftdic) < 0)
1591                 return ERROR_JTAG_INIT_FAILED;
1592
1593         /* context, vendor id, product id */
1594         if (ftdi_usb_open_desc(&ftdic, vid, pid, ft2232_device_desc,
1595                 ft2232_serial) < 0) {
1596                 if (more)
1597                         LOG_WARNING("unable to open ftdi device (trying more): %s",
1598                                 ftdic.error_str);
1599                 else
1600                         LOG_ERROR("unable to open ftdi device: %s", ftdic.error_str);
1601                 *try_more = 1;
1602                 return ERROR_JTAG_INIT_FAILED;
1603         }
1604
1605         if (ftdi_set_interface(&ftdic, INTERFACE_A) < 0)
1606         {
1607                 LOG_ERROR("unable to select FT2232 channel A: %s", ftdic.error_str);
1608                 return ERROR_JTAG_INIT_FAILED;
1609         }
1610
1611         if (ftdi_usb_reset(&ftdic) < 0)
1612         {
1613                 LOG_ERROR("unable to reset ftdi device");
1614                 return ERROR_JTAG_INIT_FAILED;
1615         }
1616
1617         if (ftdi_set_latency_timer(&ftdic, ft2232_latency) < 0)
1618         {
1619                 LOG_ERROR("unable to set latency timer");
1620                 return ERROR_JTAG_INIT_FAILED;
1621         }
1622
1623         if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0)
1624         {
1625                 LOG_ERROR("unable to get latency timer");
1626                 return ERROR_JTAG_INIT_FAILED;
1627         }
1628         else
1629         {
1630                 LOG_DEBUG("current latency timer: %i", latency_timer);
1631         }
1632
1633         ftdi_set_bitmode(&ftdic, 0x0b, 2); /* ctx, JTAG I/O mask */
1634
1635         return ERROR_OK;
1636 }
1637
1638 static int ft2232_purge_libftdi(void)
1639 {
1640         if (ftdi_usb_purge_buffers(&ftdic) < 0)
1641         {
1642                 LOG_ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
1643                 return ERROR_JTAG_INIT_FAILED;
1644         }
1645
1646         return ERROR_OK;
1647 }
1648 #endif /* BUILD_FT2232_LIBFTDI == 1 */
1649
1650 int ft2232_init(void)
1651 {
1652         u8 buf[1];
1653         int retval;
1654         u32 bytes_written;
1655         ft2232_layout_t *cur_layout = ft2232_layouts;
1656         int i;
1657
1658         if ((ft2232_layout == NULL) || (ft2232_layout[0] == 0))
1659         {
1660                 ft2232_layout = "usbjtag";
1661                 LOG_WARNING("No ft2232 layout specified, using default 'usbjtag'");
1662         }
1663
1664         while (cur_layout->name)
1665         {
1666                 if (strcmp(cur_layout->name, ft2232_layout) == 0)
1667                 {
1668                         layout = cur_layout;
1669                         break;
1670                 }
1671                 cur_layout++;
1672         }
1673
1674         if (!layout)
1675         {
1676                 LOG_ERROR("No matching layout found for %s", ft2232_layout);
1677                 return ERROR_JTAG_INIT_FAILED;
1678         }
1679
1680         for (i = 0; 1; i++) {
1681                 /*
1682                  * "more indicates that there are more IDs to try, so we should
1683                  * not print an error for an ID mismatch (but for anything
1684                  * else, we should).
1685                  *
1686                  * try_more indicates that the error code returned indicates an
1687                  * ID mismatch (and nothing else) and that we should proceeed
1688                  * with the next ID pair.
1689                  */
1690                 int more = ft2232_vid[i+1] || ft2232_pid[i+1];
1691                 int try_more = 0;
1692
1693 #if BUILD_FT2232_FTD2XX == 1
1694                 retval = ft2232_init_ftd2xx(ft2232_vid[i], ft2232_pid[i],
1695                         more, &try_more);
1696 #elif BUILD_FT2232_LIBFTDI == 1
1697                 retval = ft2232_init_libftdi(ft2232_vid[i], ft2232_pid[i],
1698                         more, &try_more);
1699 #endif
1700                 if (retval >= 0)
1701                         break;
1702                 if (!more || !try_more)
1703                         return retval;
1704         }
1705
1706         ft2232_buffer_size = 0;
1707         ft2232_buffer = malloc(FT2232_BUFFER_SIZE);
1708
1709         if (layout->init() != ERROR_OK)
1710                 return ERROR_JTAG_INIT_FAILED;
1711
1712         ft2232_speed(jtag_speed);
1713
1714         buf[0] = 0x85; /* Disconnect TDI/DO to TDO/DI for Loopback */
1715         if (((retval = ft2232_write(buf, 1, &bytes_written)) != ERROR_OK) || (bytes_written != 1))
1716         {
1717                 LOG_ERROR("couldn't write to FT2232 to disable loopback");
1718                 return ERROR_JTAG_INIT_FAILED;
1719         }
1720
1721 #if BUILD_FT2232_FTD2XX == 1
1722         return ft2232_purge_ftd2xx();
1723 #elif BUILD_FT2232_LIBFTDI == 1
1724         return ft2232_purge_libftdi();
1725 #endif
1726
1727         return ERROR_OK;
1728 }
1729
1730 int usbjtag_init(void)
1731 {
1732         u8 buf[3];
1733         u32 bytes_written;
1734
1735         low_output = 0x08;
1736         low_direction = 0x0b;
1737
1738         if (strcmp(ft2232_layout, "usbjtag") == 0)
1739         {
1740                 nTRST = 0x10;
1741                 nTRSTnOE = 0x10;
1742                 nSRST = 0x40;
1743                 nSRSTnOE = 0x40;
1744         }
1745         else if (strcmp(ft2232_layout, "signalyzer") == 0)
1746         {
1747                 nTRST = 0x10;
1748                 nTRSTnOE = 0x10;
1749                 nSRST = 0x20;
1750                 nSRSTnOE = 0x20;
1751         }
1752         else if (strcmp(ft2232_layout, "evb_lm3s811") == 0)
1753         {
1754                 nTRST = 0x0;
1755                 nTRSTnOE = 0x00;
1756                 nSRST = 0x20;
1757                 nSRSTnOE = 0x20;
1758                 low_output = 0x88;
1759                 low_direction = 0x8b;
1760         }
1761         else
1762         {
1763                 LOG_ERROR("BUG: usbjtag_init called for unknown layout '%s'", ft2232_layout);
1764                 return ERROR_JTAG_INIT_FAILED;
1765         }
1766
1767         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1768         {
1769                 low_direction &= ~nTRSTnOE; /* nTRST input */
1770                 low_output &= ~nTRST; /* nTRST = 0 */
1771         }
1772         else
1773         {
1774                 low_direction |= nTRSTnOE; /* nTRST output */
1775                 low_output |= nTRST; /* nTRST = 1 */
1776         }
1777
1778         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1779         {
1780                 low_direction |= nSRSTnOE; /* nSRST output */
1781                 low_output |= nSRST; /* nSRST = 1 */
1782         }
1783         else
1784         {
1785                 low_direction &= ~nSRSTnOE; /* nSRST input */
1786                 low_output &= ~nSRST; /* nSRST = 0 */
1787         }
1788
1789         /* initialize low byte for jtag */
1790         buf[0] = 0x80; /* command "set data bits low byte" */
1791         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, xRST high) */
1792         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
1793         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1794
1795         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1796         {
1797                 LOG_ERROR("couldn't initialize FT2232 with 'USBJTAG' layout");
1798                 return ERROR_JTAG_INIT_FAILED;
1799         }
1800
1801         return ERROR_OK;
1802 }
1803
1804 int axm0432_jtag_init(void)
1805 {
1806         u8 buf[3];
1807         u32 bytes_written;
1808
1809         low_output = 0x08;
1810         low_direction = 0x2b;
1811
1812         /* initialize low byte for jtag */
1813         buf[0] = 0x80; /* command "set data bits low byte" */
1814         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1815         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1816         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1817
1818         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1819         {
1820                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1821                 return ERROR_JTAG_INIT_FAILED;
1822         }
1823
1824         if (strcmp(layout->name, "axm0432_jtag") == 0)
1825         {
1826                 nTRST = 0x08;
1827                 nTRSTnOE = 0x0;  /* No output enable for TRST*/
1828                 nSRST = 0x04;
1829                 nSRSTnOE = 0x0;  /* No output enable for SRST*/
1830         }
1831         else
1832         {
1833                 LOG_ERROR("BUG: axm0432_jtag_init called for non axm0432 layout");
1834                 exit(-1);
1835         }
1836
1837         high_output = 0x0;
1838         high_direction = 0x0c;
1839
1840         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1841         {
1842                 LOG_ERROR("can't set nTRSTOE to push-pull on the Dicarlo jtag");
1843         }
1844         else
1845         {
1846                 high_output |= nTRST;
1847         }
1848
1849         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1850         {
1851                 LOG_ERROR("can't set nSRST to push-pull on the Dicarlo jtag");
1852         }
1853         else
1854         {
1855                 high_output |= nSRST;
1856         }
1857
1858         /* initialize high port */
1859         buf[0] = 0x82; /* command "set data bits high byte" */
1860         buf[1] = high_output; /* value */
1861         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
1862         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1863
1864         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1865         {
1866                 LOG_ERROR("couldn't initialize FT2232 with 'Dicarlo' layout");
1867                 return ERROR_JTAG_INIT_FAILED;
1868         }
1869
1870         return ERROR_OK;
1871 }
1872
1873 int jtagkey_init(void)
1874 {
1875         u8 buf[3];
1876         u32 bytes_written;
1877
1878         low_output = 0x08;
1879         low_direction = 0x1b;
1880
1881         /* initialize low byte for jtag */
1882         buf[0] = 0x80; /* command "set data bits low byte" */
1883         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1884         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1885         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1886
1887         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1888         {
1889                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1890                 return ERROR_JTAG_INIT_FAILED;
1891         }
1892
1893         if (strcmp(layout->name, "jtagkey") == 0)
1894         {
1895                 nTRST = 0x01;
1896                 nTRSTnOE = 0x4;
1897                 nSRST = 0x02;
1898                 nSRSTnOE = 0x08;
1899         }
1900         else if ((strcmp(layout->name, "jtagkey_prototype_v1") == 0) ||
1901                 (strcmp(layout->name, "oocdlink") == 0))
1902         {
1903                 nTRST = 0x02;
1904                 nTRSTnOE = 0x1;
1905                 nSRST = 0x08;
1906                 nSRSTnOE = 0x04;
1907         }
1908         else
1909         {
1910                 LOG_ERROR("BUG: jtagkey_init called for non jtagkey layout");
1911                 exit(-1);
1912         }
1913
1914         high_output = 0x0;
1915         high_direction = 0x0f;
1916
1917         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1918         {
1919                 high_output |= nTRSTnOE;
1920                 high_output &= ~nTRST;
1921         }
1922         else
1923         {
1924                 high_output &= ~nTRSTnOE;
1925                 high_output |= nTRST;
1926         }
1927
1928         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1929         {
1930                 high_output &= ~nSRSTnOE;
1931                 high_output |= nSRST;
1932         }
1933         else
1934         {
1935                 high_output |= nSRSTnOE;
1936                 high_output &= ~nSRST;
1937         }
1938
1939         /* initialize high port */
1940         buf[0] = 0x82; /* command "set data bits high byte" */
1941         buf[1] = high_output; /* value */
1942         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
1943         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1944
1945         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1946         {
1947                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1948                 return ERROR_JTAG_INIT_FAILED;
1949         }
1950
1951         return ERROR_OK;
1952 }
1953
1954 int olimex_jtag_init(void)
1955 {
1956         u8 buf[3];
1957         u32 bytes_written;
1958
1959         low_output = 0x08;
1960         low_direction = 0x1b;
1961
1962         /* initialize low byte for jtag */
1963         buf[0] = 0x80; /* command "set data bits low byte" */
1964         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1965         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1966         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1967
1968         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
1969         {
1970                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1971                 return ERROR_JTAG_INIT_FAILED;
1972         }
1973
1974         nTRST = 0x01;
1975         nTRSTnOE = 0x4;
1976         nSRST = 0x02;
1977         nSRSTnOE = 0x00; /* no output enable for nSRST */
1978
1979         high_output = 0x0;
1980         high_direction = 0x0f;
1981
1982         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1983         {
1984                 high_output |= nTRSTnOE;
1985                 high_output &= ~nTRST;
1986         }
1987         else
1988         {
1989                 high_output &= ~nTRSTnOE;
1990                 high_output |= nTRST;
1991         }
1992
1993         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1994         {
1995                 LOG_ERROR("can't set nSRST to push-pull on the Olimex ARM-USB-OCD");
1996         }
1997         else
1998         {
1999                 high_output &= ~nSRST;
2000         }
2001
2002         /* turn red LED on */
2003         high_output |= 0x08;
2004
2005         /* initialize high port */
2006         buf[0] = 0x82; /* command "set data bits high byte" */
2007         buf[1] = high_output; /* value */
2008         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
2009         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2010
2011         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2012         {
2013                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
2014                 return ERROR_JTAG_INIT_FAILED;
2015         }
2016
2017         return ERROR_OK;
2018 }
2019
2020 int flyswatter_init(void)
2021 {
2022         u8 buf[3];
2023         u32 bytes_written;
2024
2025         low_output = 0x18;
2026         low_direction = 0xfb;
2027
2028         /* initialize low byte for jtag */
2029         buf[0] = 0x80; /* command "set data bits low byte" */
2030         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2031         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE[12]=out, n[ST]srst=out */
2032         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2033
2034         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2035         {
2036                 LOG_ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
2037                 return ERROR_JTAG_INIT_FAILED;
2038         }
2039
2040         nTRST = 0x10;
2041         nTRSTnOE = 0x0; /* not output enable for nTRST */
2042         nSRST = 0x20;
2043         nSRSTnOE = 0x00; /* no output enable for nSRST */
2044
2045         high_output = 0x00;
2046         high_direction = 0x0c;
2047
2048         /* turn red LED1 on, LED2 off */
2049         high_output |= 0x08;
2050
2051         /* initialize high port */
2052         buf[0] = 0x82; /* command "set data bits high byte" */
2053         buf[1] = high_output; /* value */
2054         buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
2055         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2056
2057         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2058         {
2059                 LOG_ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
2060                 return ERROR_JTAG_INIT_FAILED;
2061         }
2062
2063         return ERROR_OK;
2064 }
2065
2066 int turtle_init(void)
2067 {
2068         u8 buf[3];
2069         u32 bytes_written;
2070
2071         low_output = 0x08;
2072         low_direction = 0x5b;
2073
2074         /* initialize low byte for jtag */
2075         buf[0] = 0x80; /* command "set data bits low byte" */
2076         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2077         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2078         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2079
2080         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2081         {
2082                 LOG_ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
2083                 return ERROR_JTAG_INIT_FAILED;
2084         }
2085
2086         nSRST = 0x40;
2087
2088         high_output = 0x00;
2089         high_direction = 0x0C;
2090
2091         /* initialize high port */
2092         buf[0] = 0x82; /* command "set data bits high byte" */
2093         buf[1] = high_output;
2094         buf[2] = high_direction;
2095         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2096
2097         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2098         {
2099                 LOG_ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
2100                 return ERROR_JTAG_INIT_FAILED;
2101         }
2102
2103         return ERROR_OK;
2104 }
2105
2106 int comstick_init(void)
2107 {
2108         u8 buf[3];
2109         u32 bytes_written;
2110
2111         low_output = 0x08;
2112         low_direction = 0x0b;
2113
2114         /* initialize low byte for jtag */
2115         buf[0] = 0x80; /* command "set data bits low byte" */
2116         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2117         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2118         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2119
2120         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2121         {
2122                 LOG_ERROR("couldn't initialize FT2232 with 'comstick' layout");
2123                 return ERROR_JTAG_INIT_FAILED;
2124         }
2125
2126         nTRST = 0x01;
2127         nTRSTnOE = 0x00; /* no output enable for nTRST */
2128         nSRST = 0x02;
2129         nSRSTnOE = 0x00; /* no output enable for nSRST */
2130
2131         high_output = 0x03;
2132         high_direction = 0x03;
2133
2134         /* initialize high port */
2135         buf[0] = 0x82; /* command "set data bits high byte" */
2136         buf[1] = high_output;
2137         buf[2] = high_direction;
2138         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2139
2140         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2141         {
2142                 LOG_ERROR("couldn't initialize FT2232 with 'comstick' layout");
2143                 return ERROR_JTAG_INIT_FAILED;
2144         }
2145
2146         return ERROR_OK;
2147 }
2148
2149 int stm32stick_init(void)
2150 {
2151         u8 buf[3];
2152         u32 bytes_written;
2153
2154         low_output = 0x88;
2155         low_direction = 0x8b;
2156
2157         /* initialize low byte for jtag */
2158         buf[0] = 0x80; /* command "set data bits low byte" */
2159         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2160         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2161         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2162
2163         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2164         {
2165                 LOG_ERROR("couldn't initialize FT2232 with 'stm32stick' layout");
2166                 return ERROR_JTAG_INIT_FAILED;
2167         }
2168
2169         nTRST = 0x01;
2170         nTRSTnOE = 0x00; /* no output enable for nTRST */
2171         nSRST = 0x80;
2172         nSRSTnOE = 0x00; /* no output enable for nSRST */
2173
2174         high_output = 0x01;
2175         high_direction = 0x03;
2176
2177         /* initialize high port */
2178         buf[0] = 0x82; /* command "set data bits high byte" */
2179         buf[1] = high_output;
2180         buf[2] = high_direction;
2181         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2182
2183         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2184         {
2185                 LOG_ERROR("couldn't initialize FT2232 with 'stm32stick' layout");
2186                 return ERROR_JTAG_INIT_FAILED;
2187         }
2188
2189         return ERROR_OK;
2190 }
2191
2192 void olimex_jtag_blink(void)
2193 {
2194         /* Olimex ARM-USB-OCD has a LED connected to ACBUS3
2195          * ACBUS3 is bit 3 of the GPIOH port
2196          */
2197         if (high_output & 0x08)
2198         {
2199                 /* set port pin high */
2200                 high_output &= 0x07;
2201         }
2202         else
2203         {
2204                 /* set port pin low */
2205                 high_output |= 0x08;
2206         }
2207
2208         BUFFER_ADD = 0x82;
2209         BUFFER_ADD = high_output;
2210         BUFFER_ADD = high_direction;
2211 }
2212
2213 void turtle_jtag_blink(void)
2214 {
2215         /*
2216    * Turtelizer2 has two LEDs connected to ACBUS2 and ACBUS3
2217          */
2218         if (high_output & 0x08)
2219         {
2220                 high_output = 0x04;
2221         }
2222         else
2223         {
2224                 high_output = 0x08;
2225         }
2226
2227         BUFFER_ADD = 0x82;
2228         BUFFER_ADD = high_output;
2229         BUFFER_ADD = high_direction;
2230 }
2231
2232 int ft2232_quit(void)
2233 {
2234 #if BUILD_FT2232_FTD2XX == 1
2235         FT_STATUS status;
2236
2237         status = FT_Close(ftdih);
2238 #elif BUILD_FT2232_LIBFTDI == 1
2239         ftdi_disable_bitbang(&ftdic);
2240
2241         ftdi_usb_close(&ftdic);
2242
2243         ftdi_deinit(&ftdic);
2244 #endif
2245
2246         free(ft2232_buffer);
2247         ft2232_buffer = NULL;
2248
2249         return ERROR_OK;
2250 }
2251
2252 int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2253 {
2254         if (argc == 1)
2255         {
2256                 ft2232_device_desc = strdup(args[0]);
2257         }
2258         else
2259         {
2260                 LOG_ERROR("expected exactly one argument to ft2232_device_desc <description>");
2261         }
2262
2263         return ERROR_OK;
2264 }
2265
2266 int ft2232_handle_serial_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2267 {
2268         if (argc == 1)
2269         {
2270                 ft2232_serial = strdup(args[0]);
2271         }
2272         else
2273         {
2274                 LOG_ERROR("expected exactly one argument to ft2232_serial <serial-number>");
2275         }
2276
2277         return ERROR_OK;
2278 }
2279
2280 int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2281 {
2282         if (argc == 0)
2283                 return ERROR_OK;
2284
2285         ft2232_layout = malloc(strlen(args[0]) + 1);
2286         strcpy(ft2232_layout, args[0]);
2287
2288         return ERROR_OK;
2289 }
2290
2291 int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2292 {
2293         int i;
2294
2295         if (argc > MAX_USB_IDS*2) {
2296                 LOG_WARNING("ignoring extra IDs in ft2232_vid_pid "
2297                         "(maximum is %d pairs)", MAX_USB_IDS);
2298                 argc = MAX_USB_IDS*2;
2299         }
2300         if (argc < 2 || (argc & 1))
2301         {
2302                 LOG_WARNING("incomplete ft2232_vid_pid configuration directive");
2303                 if (argc < 2)
2304                         return ERROR_OK;
2305         }
2306
2307         for (i = 0; i+1 < argc; i += 2) {
2308                 ft2232_vid[i >> 1] = strtol(args[i], NULL, 0);
2309                 ft2232_pid[i >> 1] = strtol(args[i+1], NULL, 0);
2310         }
2311         /*
2312          * Explicitly terminate, in case there are multiples instances of
2313          * ft2232_vid_pid.
2314          */
2315         ft2232_vid[i >> 1] = ft2232_pid[i >> 1] = 0;
2316
2317         return ERROR_OK;
2318 }
2319
2320 int ft2232_handle_latency_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2321 {
2322         if (argc == 1)
2323         {
2324                 ft2232_latency = atoi(args[0]);
2325         }
2326         else
2327         {
2328                 LOG_ERROR("expected exactly one argument to ft2232_latency <ms>");
2329         }
2330
2331         return ERROR_OK;
2332 }
2333
2334
2335 static int ft2232_stableclocks(int num_cycles, jtag_command_t *cmd)
2336 {
2337         int retval = 0;
2338
2339         while (num_cycles > 0)
2340         {
2341                 /* the command 0x4b, "Clock Data to TMS/CS Pin (no Read)" handles
2342                  * at most 7 bits per invocation.  Here we invoke it potentially
2343                  * several times.
2344                  */
2345                 int bitcount_per_command = (num_cycles > 7) ? 7 : num_cycles;
2346
2347                 if (ft2232_buffer_size + 3 >= FT2232_BUFFER_SIZE)
2348                 {
2349                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
2350                                 retval = ERROR_JTAG_QUEUE_FAILED;
2351
2352                         first_unsent = cmd;
2353                 }
2354
2355                 /* command "Clock Data to TMS/CS Pin (no Read)" */
2356                 BUFFER_ADD = 0x4b;
2357
2358                 /* scan 7 bit */
2359                 BUFFER_ADD = bitcount_per_command - 1;
2360
2361                 /* TMS data bits are all zeros to stay in the current stable state */
2362                 BUFFER_ADD = 0x0;
2363
2364                 require_send = 1;
2365
2366                 num_cycles -= bitcount_per_command;
2367         }
2368
2369         return retval;
2370 }
2371