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
  24
  25 /* This code uses information contained in the MPSSE specification which was
  26  * found here:
  27  * http://www.ftdichip.com/Documents/AppNotes/AN2232C-01_MPSSE_Cmnd.pdf
  28  * Hereafter this is called the "MPSSE Spec".
  29  */
  30
  31
  32 #ifdef HAVE_CONFIG_H
  33 #include "config.h"
  34 #endif
  35
  36 #if IS_CYGWIN == 1
  37 #include "windows.h"
  38 #endif
  39
  40 #include "replacements.h"
  41
  42 /* project specific includes */
  43 #include "log.h"
  44 #include "types.h"
  45 #include "jtag.h"
  46 #include "configuration.h"
  47 #include "time_support.h"
  48
  49 /* system includes */
  50 #include <string.h>
  51 #include <stdlib.h>
  52 #include <unistd.h>
  53
  54 /* FT2232 access library includes */
  55 #if BUILD_FT2232_FTD2XX == 1
  56 #include <ftd2xx.h>
  57 #elif BUILD_FT2232_LIBFTDI == 1
  58 #include <ftdi.h>
  59 #endif
  60
  61 /* enable this to debug io latency
  62  */
  63 #if 0
  64 #define _DEBUG_USB_IO_
  65 #endif
  66
  67 /* enable this to debug communication
  68  */
  69 #if 0
  70 #define _DEBUG_USB_COMMS_
  71 #endif
  72
  73 int ft2232_execute_queue(void);
  74
  75 int ft2232_speed(int speed);
  76 int ft2232_speed_div(int speed, int* khz);
  77 int ft2232_khz(int khz, int* jtag_speed);
  78 int ft2232_register_commands(struct command_context_s* cmd_ctx);
  79 int ft2232_init(void);
  80 int ft2232_quit(void);
  81
  82 int ft2232_handle_device_desc_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
  83 int ft2232_handle_serial_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
  84 int ft2232_handle_layout_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
  85 int ft2232_handle_vid_pid_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
  86 int ft2232_handle_latency_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
  87
  88
  89 /**
  90  * Function ft2232_stableclocks
  91  * will send out \a num_cycles on the TCK line while the TAP(s)
  92  * are in a stable state.  Calling code must ensure that current state is
  93  * stable, that verification is not done in here.
  94  * @param num_cycles is the count of clocks cycles to send.
  95  * @return int - ERROR_OK or ERROR_JTAG_QUEUE_FAILED
  96  */
  97 static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd);
  98
  99
 100 char *        ft2232_device_desc_A = NULL;
 101 char*         ft2232_device_desc = NULL;
 102 char*         ft2232_serial  = NULL;
 103 char*         ft2232_layout  = NULL;
 104 unsigned char ft2232_latency = 2;
 105
 106 #define MAX_USB_IDS 8
 107 /* vid = pid = 0 marks the end of the list */
 108 static u16 ft2232_vid[MAX_USB_IDS + 1] = { 0x0403, 0 };
 109 static u16 ft2232_pid[MAX_USB_IDS + 1] = { 0x6010, 0 };
 110
 111 typedef struct ft2232_layout_s
 112 {
 113         char* name;
 114         int (*init)(void);
 115         void (*reset)(int trst, int srst);
 116         void (*blink)(void);
 117 } ft2232_layout_t;
 118
 119 /* init procedures for supported layouts */
 120 int  usbjtag_init(void);
 121 int  jtagkey_init(void);
 122 int  olimex_jtag_init(void);
 123 int  flyswatter_init(void);
 124 int  turtle_init(void);
 125 int  comstick_init(void);
 126 int  stm32stick_init(void);
 127 int  axm0432_jtag_init(void);
 128 int sheevaplug_init(void);
 129
 130 /* reset procedures for supported layouts */
 131 void usbjtag_reset(int trst, int srst);
 132 void jtagkey_reset(int trst, int srst);
 133 void olimex_jtag_reset(int trst, int srst);
 134 void flyswatter_reset(int trst, int srst);
 135 void turtle_reset(int trst, int srst);
 136 void comstick_reset(int trst, int srst);
 137 void stm32stick_reset(int trst, int srst);
 138 void axm0432_jtag_reset(int trst, int srst);
 139 void sheevaplug_reset(int trst, int srst);
 140
 141 /* blink procedures for layouts that support a blinking led */
 142 void olimex_jtag_blink(void);
 143 void flyswatter_jtag_blink(void);
 144 void turtle_jtag_blink(void);
 145
 146 ft2232_layout_t            ft2232_layouts[] =
 147 {
 148         { "usbjtag",              usbjtag_init,              usbjtag_reset,      NULL                    },
 149         { "jtagkey",              jtagkey_init,              jtagkey_reset,      NULL                    },
 150         { "jtagkey_prototype_v1", jtagkey_init,              jtagkey_reset,      NULL                    },
 151         { "oocdlink",             jtagkey_init,              jtagkey_reset,      NULL                    },
 152         { "signalyzer",           usbjtag_init,              usbjtag_reset,      NULL                    },
 153         { "evb_lm3s811",          usbjtag_init,              usbjtag_reset,      NULL                    },
 154         { "olimex-jtag",          olimex_jtag_init,          olimex_jtag_reset,  olimex_jtag_blink       },
 155         { "flyswatter",           flyswatter_init,           flyswatter_reset,   flyswatter_jtag_blink   },
 156         { "turtelizer2",          turtle_init,               turtle_reset,       turtle_jtag_blink       },
 157         { "comstick",             comstick_init,             comstick_reset,     NULL                    },
 158         { "stm32stick",           stm32stick_init,           stm32stick_reset,   NULL                    },
 159         { "axm0432_jtag",         axm0432_jtag_init,         axm0432_jtag_reset, NULL                    },
 160         {"sheevaplug",            sheevaplug_init,           sheevaplug_reset,   NULL                    },
 161         { NULL,                   NULL,                      NULL,               NULL                    },
 162 };
 163
 164 static u8                  nTRST, nTRSTnOE, nSRST, nSRSTnOE;
 165
 166 static ft2232_layout_t*    layout;
 167 static u8                  low_output     = 0x0;
 168 static u8                  low_direction  = 0x0;
 169 static u8                  high_output    = 0x0;
 170 static u8                  high_direction = 0x0;
 171
 172 #if BUILD_FT2232_FTD2XX == 1
 173 static FT_HANDLE           ftdih = NULL;
 174 #elif BUILD_FT2232_LIBFTDI == 1
 175 static struct ftdi_context ftdic;
 176 #endif
 177
 178
 179 static jtag_command_t* first_unsent;        /* next command that has to be sent */
 180 static int             require_send;
 181
 182 static u8*             ft2232_buffer = NULL;
 183 static int             ft2232_buffer_size  = 0;
 184 static int             ft2232_read_pointer = 0;
 185 static int             ft2232_expect_read  = 0;
 186
 187 #define FT2232_BUFFER_SIZE 131072
 188 #define BUFFER_ADD         ft2232_buffer[ft2232_buffer_size++]
 189 #define BUFFER_READ        ft2232_buffer[ft2232_read_pointer++]
 190
 191 jtag_interface_t ft2232_interface =
 192 {
 193         .name               = "ft2232",
 194         .execute_queue = ft2232_execute_queue,
 195         .speed     = ft2232_speed,
 196         .speed_div = ft2232_speed_div,
 197         .khz                = ft2232_khz,
 198         .register_commands  = ft2232_register_commands,
 199         .init = ft2232_init,
 200         .quit = ft2232_quit,
 201 };
 202
 203 int ft2232_write(u8* buf, int size, u32* bytes_written)
 204 {
 205 #if BUILD_FT2232_FTD2XX == 1
 206         FT_STATUS status;
 207         DWORD     dw_bytes_written;
 208         if ( ( status = FT_Write(ftdih, buf, size, &dw_bytes_written) ) != FT_OK )
 209         {
 210                 *bytes_written = dw_bytes_written;
 211                 LOG_ERROR("FT_Write returned: %lu", status);
 212                 return ERROR_JTAG_DEVICE_ERROR;
 213         }
 214         else
 215         {
 216                 *bytes_written = dw_bytes_written;
 217                 return ERROR_OK;
 218         }
 219 #elif BUILD_FT2232_LIBFTDI == 1
 220         int retval;
 221         if ( ( retval = ftdi_write_data(&ftdic, buf, size) ) < 0 )
 222         {
 223                 *bytes_written = 0;
 224                 LOG_ERROR( "ftdi_write_data: %s", ftdi_get_error_string(&ftdic) );
 225                 return ERROR_JTAG_DEVICE_ERROR;
 226         }
 227         else
 228         {
 229                 *bytes_written = retval;
 230                 return ERROR_OK;
 231         }
 232 #endif
 233 }
 234
 235
 236 int ft2232_read(u8* buf, u32 size, u32* bytes_read)
 237 {
 238 #if BUILD_FT2232_FTD2XX == 1
 239         DWORD     dw_bytes_read;
 240         FT_STATUS status;
 241         int       timeout = 5;
 242         *bytes_read = 0;
 243
 244         while ( (*bytes_read < size) && timeout-- )
 245         {
 246                 if ( ( status = FT_Read(ftdih, buf + *bytes_read, size -
 247                                           *bytes_read, &dw_bytes_read) ) != FT_OK )
 248                 {
 249                         *bytes_read = 0;
 250                         LOG_ERROR("FT_Read returned: %lu", status);
 251                         return ERROR_JTAG_DEVICE_ERROR;
 252                 }
 253                 *bytes_read += dw_bytes_read;
 254         }
 255
 256 #elif BUILD_FT2232_LIBFTDI == 1
 257         int retval;
 258         int timeout = 100;
 259         *bytes_read = 0;
 260
 261         while ( (*bytes_read < size) && timeout-- )
 262         {
 263                 if ( ( retval = ftdi_read_data(&ftdic, buf + *bytes_read, size - *bytes_read) ) < 0 )
 264                 {
 265                         *bytes_read = 0;
 266                         LOG_ERROR( "ftdi_read_data: %s", ftdi_get_error_string(&ftdic) );
 267                         return ERROR_JTAG_DEVICE_ERROR;
 268                 }
 269                 *bytes_read += retval;
 270         }
 271
 272 #endif
 273
 274         if (*bytes_read < size)
 275         {
 276                 LOG_ERROR("couldn't read the requested number of bytes from FT2232 device (%i < %i)", *bytes_read, size);
 277                 return ERROR_JTAG_DEVICE_ERROR;
 278         }
 279
 280         return ERROR_OK;
 281 }
 282
 283
 284 int ft2232_speed(int speed)
 285 {
 286         u8  buf[3];
 287         int retval;
 288         u32 bytes_written;
 289
 290         buf[0] = 0x86;                  /* command "set divisor" */
 291         buf[1] = speed & 0xff;          /* valueL (0=6MHz, 1=3MHz, 2=2.0MHz, ...*/
 292         buf[2] = (speed >> 8) & 0xff;   /* valueH */
 293
 294         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
 295         if ( ( ( retval = ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
 296         {
 297                 LOG_ERROR("couldn't set FT2232 TCK speed");
 298                 return retval;
 299         }
 300
 301         return ERROR_OK;
 302 }
 303
 304
 305 int ft2232_speed_div(int speed, int* khz)
 306 {
 307         /* Take a look in the FT2232 manual,
 308          * AN2232C-01 Command Processor for
 309          * MPSSE and MCU Host Bus. Chapter 3.8 */
 310
 311         *khz = 6000 / (1 + speed);
 312
 313         return ERROR_OK;
 314 }
 315
 316
 317 int ft2232_khz(int khz, int* jtag_speed)
 318 {
 319         if (khz==0)
 320         {
 321                 LOG_ERROR("RCLK not supported");
 322                 return ERROR_FAIL;
 323         }
 324
 325         /* Take a look in the FT2232 manual,
 326          * AN2232C-01 Command Processor for
 327          * MPSSE and MCU Host Bus. Chapter 3.8
 328          *
 329          * We will calc here with a multiplier
 330          * of 10 for better rounding later. */
 331
 332         /* Calc speed, (6000 / khz) - 1 */
 333         /* Use 65000 for better rounding */
 334         *jtag_speed = (60000 / khz) - 10;
 335
 336         /* Add 0.9 for rounding */
 337         *jtag_speed += 9;
 338
 339         /* Calc real speed */
 340         *jtag_speed = *jtag_speed / 10;
 341
 342         /* Check if speed is greater than 0 */
 343         if (*jtag_speed < 0)
 344         {
 345                 *jtag_speed = 0;
 346         }
 347
 348         /* Check max value */
 349         if (*jtag_speed > 0xFFFF)
 350         {
 351                 *jtag_speed = 0xFFFF;
 352         }
 353
 354         return ERROR_OK;
 355 }
 356
 357
 358 int ft2232_register_commands(struct command_context_s* cmd_ctx)
 359 {
 360         register_command(cmd_ctx, NULL, "ft2232_device_desc", ft2232_handle_device_desc_command,
 361                         COMMAND_CONFIG, "the USB device description of the FTDI FT2232 device");
 362         register_command(cmd_ctx, NULL, "ft2232_serial", ft2232_handle_serial_command,
 363                         COMMAND_CONFIG, "the serial number of the FTDI FT2232 device");
 364         register_command(cmd_ctx, NULL, "ft2232_layout", ft2232_handle_layout_command,
 365                         COMMAND_CONFIG, "the layout of the FT2232 GPIO signals used to control output-enables and reset signals");
 366         register_command(cmd_ctx, NULL, "ft2232_vid_pid", ft2232_handle_vid_pid_command,
 367                         COMMAND_CONFIG, "the vendor ID and product ID of the FTDI FT2232 device");
 368         register_command(cmd_ctx, NULL, "ft2232_latency", ft2232_handle_latency_command,
 369                         COMMAND_CONFIG, "set the FT2232 latency timer to a new value");
 370         return ERROR_OK;
 371 }
 372
 373
 374 void ft2232_end_state(tap_state_t state)
 375 {
 376         if (tap_is_state_stable(state))
 377                 tap_set_end_state(state);
 378         else
 379         {
 380                 LOG_ERROR("BUG: %i is not a valid end state", state);
 381                 exit(-1);
 382         }
 383 }
 384
 385
 386 void ft2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
 387 {
 388         int num_bytes = (scan_size + 7) / 8;
 389         int bits_left = scan_size;
 390         int cur_byte  = 0;
 391
 392         while (num_bytes-- > 1)
 393         {
 394                 buffer[cur_byte] = BUFFER_READ;
 395                 cur_byte++;
 396                 bits_left -= 8;
 397         }
 398
 399         buffer[cur_byte] = 0x0;
 400
 401         if (bits_left > 1)
 402         {
 403                 buffer[cur_byte] = BUFFER_READ >> 1;
 404         }
 405
 406         buffer[cur_byte] = ( buffer[cur_byte] | ( (BUFFER_READ & 0x02) << 6 ) ) >> (8 - bits_left);
 407 }
 408
 409
 410 void ft2232_debug_dump_buffer(void)
 411 {
 412         int   i;
 413         char  line[256];
 414         char* line_p = line;
 415
 416         for (i = 0; i < ft2232_buffer_size; i++)
 417         {
 418                 line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ft2232_buffer[i]);
 419                 if (i % 16 == 15)
 420                 {
 421                         LOG_DEBUG("%s", line);
 422                         line_p = line;
 423                 }
 424         }
 425
 426         if (line_p != line)
 427                 LOG_DEBUG("%s", line);
 428 }
 429
 430
 431 int ft2232_send_and_recv(jtag_command_t* first, jtag_command_t* last)
 432 {
 433         jtag_command_t* cmd;
 434         u8*             buffer;
 435         int             scan_size;
 436         enum scan_type  type;
 437         int             retval;
 438         u32             bytes_written;
 439         u32             bytes_read;
 440
 441 #ifdef _DEBUG_USB_IO_
 442         struct timeval  start, inter, inter2, end;
 443         struct timeval  d_inter, d_inter2, d_end;
 444 #endif
 445
 446 #ifdef _DEBUG_USB_COMMS_
 447         LOG_DEBUG("write buffer (size %i):", ft2232_buffer_size);
 448         ft2232_debug_dump_buffer();
 449 #endif
 450
 451 #ifdef _DEBUG_USB_IO_
 452         gettimeofday(&start, NULL);
 453 #endif
 454
 455         if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
 456         {
 457                 LOG_ERROR("couldn't write MPSSE commands to FT2232");
 458                 return retval;
 459         }
 460
 461 #ifdef _DEBUG_USB_IO_
 462         gettimeofday(&inter, NULL);
 463 #endif
 464
 465         if (ft2232_expect_read)
 466         {
 467                 int timeout = 100;
 468                 ft2232_buffer_size = 0;
 469
 470 #ifdef _DEBUG_USB_IO_
 471                 gettimeofday(&inter2, NULL);
 472 #endif
 473
 474                 if ( ( retval = ft2232_read(ft2232_buffer, ft2232_expect_read, &bytes_read) ) != ERROR_OK )
 475                 {
 476                         LOG_ERROR("couldn't read from FT2232");
 477                         return retval;
 478                 }
 479
 480 #ifdef _DEBUG_USB_IO_
 481                 gettimeofday(&end, NULL);
 482
 483                 timeval_subtract(&d_inter, &inter, &start);
 484                 timeval_subtract(&d_inter2, &inter2, &start);
 485                 timeval_subtract(&d_end, &end, &start);
 486
 487                 LOG_INFO("inter: %i.%06i, inter2: %i.%06i end: %i.%06i", d_inter.tv_sec, d_inter.tv_usec, d_inter2.tv_sec,
 488                                 d_inter2.tv_usec, d_end.tv_sec,
 489                                 d_end.tv_usec);
 490 #endif
 491
 492                 ft2232_buffer_size = bytes_read;
 493
 494                 if (ft2232_expect_read != ft2232_buffer_size)
 495                 {
 496                         LOG_ERROR("ft2232_expect_read (%i) != ft2232_buffer_size (%i) (%i retries)", ft2232_expect_read,
 497                                         ft2232_buffer_size,
 498                                         100 - timeout);
 499                         ft2232_debug_dump_buffer();
 500
 501                         exit(-1);
 502                 }
 503
 504 #ifdef _DEBUG_USB_COMMS_
 505                 LOG_DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ft2232_buffer_size);
 506                 ft2232_debug_dump_buffer();
 507 #endif
 508         }
 509
 510         ft2232_expect_read  = 0;
 511         ft2232_read_pointer = 0;
 512
 513         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 514          * that wasn't handled by a caller-provided error handler
 515          */
 516         retval = ERROR_OK;
 517
 518         cmd = first;
 519         while (cmd != last)
 520         {
 521                 switch (cmd->type)
 522                 {
 523                 case JTAG_SCAN:
 524                         type = jtag_scan_type(cmd->cmd.scan);
 525                         if (type != SCAN_OUT)
 526                         {
 527                                 scan_size = jtag_scan_size(cmd->cmd.scan);
 528                                 buffer    = calloc(CEIL(scan_size, 8), 1);
 529                                 ft2232_read_scan(type, buffer, scan_size);
 530                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 531                                         retval = ERROR_JTAG_QUEUE_FAILED;
 532                                 free(buffer);
 533                         }
 534                         break;
 535
 536                 default:
 537                         break;
 538                 }
 539
 540                 cmd = cmd->next;
 541         }
 542
 543         ft2232_buffer_size = 0;
 544
 545         return retval;
 546 }
 547
 548
 549 void ft2232_add_pathmove(pathmove_command_t* cmd)
 550 {
 551         int num_states = cmd->num_states;
 552         int state_count = 0;
 553
 554         while (num_states)
 555         {
 556                 u8  tms_byte = 0;       /* zero this on each MPSSE batch */
 557
 558                 int bit_count = 0;
 559
 560                 int num_states_batch = num_states > 7 ? 7 : num_states;
 561
 562                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 563                 BUFFER_ADD = 0x4b;
 564
 565                 /* number of states remaining */
 566                 BUFFER_ADD = num_states_batch - 1;
 567
 568                 while (num_states_batch--)
 569                 {
 570                         if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 571                                 buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
 572                         else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 573                                 buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
 574                         else
 575                         {
 576                                 LOG_ERROR( "BUG: %s -> %s isn't a valid TAP transition", tap_state_name(
 577                                                                  tap_get_state() ), tap_state_name(cmd->path[state_count]) );
 578                                 exit(-1);
 579                         }
 580
 581                         tap_set_state(cmd->path[state_count]);
 582                         state_count++;
 583                         num_states--;
 584                 }
 585
 586                 BUFFER_ADD = tms_byte;
 587         }
 588
 589         tap_set_end_state(tap_get_state());
 590 }
 591
 592
 593 void ft2232_add_scan(int ir_scan, enum scan_type type, u8* buffer, int scan_size)
 594 {
 595         int num_bytes = (scan_size + 7) / 8;
 596         int bits_left = scan_size;
 597         int cur_byte  = 0;
 598         int last_bit;
 599
 600         if ( !( ( !ir_scan && (tap_get_state() == TAP_DRSHIFT) )
 601            || (    ir_scan && (tap_get_state() == TAP_IRSHIFT) ) ) )
 602         {
 603                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 604                 BUFFER_ADD = 0x4b;
 605
 606                 BUFFER_ADD = 0x6;       /* scan 7 bits */
 607
 608                 /* TMS data bits */
 609                 if (ir_scan)
 610                 {
 611                         BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_IRSHIFT);
 612                         tap_set_state(TAP_IRSHIFT);
 613                 }
 614                 else
 615                 {
 616                         BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_DRSHIFT);
 617                         tap_set_state(TAP_DRSHIFT);
 618                 }
 619                 /* LOG_DEBUG("added TMS scan (no read)"); */
 620         }
 621
 622         /* add command for complete bytes */
 623         while (num_bytes > 1)
 624         {
 625                 int thisrun_bytes;
 626                 if (type == SCAN_IO)
 627                 {
 628                         /* Clock Data Bytes In and Out LSB First */
 629                         BUFFER_ADD = 0x39;
 630                         /* LOG_DEBUG("added TDI bytes (io %i)", num_bytes); */
 631                 }
 632                 else if (type == SCAN_OUT)
 633                 {
 634                         /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
 635                         BUFFER_ADD = 0x19;
 636                         /* LOG_DEBUG("added TDI bytes (o)"); */
 637                 }
 638                 else if (type == SCAN_IN)
 639                 {
 640                         /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
 641                         BUFFER_ADD = 0x28;
 642                         /* LOG_DEBUG("added TDI bytes (i %i)", num_bytes); */
 643                 }
 644
 645                 thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
 646                 num_bytes    -= thisrun_bytes;
 647                 BUFFER_ADD    = (thisrun_bytes - 1) & 0xff;
 648                 BUFFER_ADD    = ( (thisrun_bytes - 1) >> 8 ) & 0xff;
 649
 650                 if (type != SCAN_IN)
 651                 {
 652                         /* add complete bytes */
 653                         while (thisrun_bytes-- > 0)
 654                         {
 655                                 BUFFER_ADD = buffer[cur_byte];
 656                                 cur_byte++;
 657                                 bits_left -= 8;
 658                         }
 659                 }
 660                 else /* (type == SCAN_IN) */
 661                 {
 662                         bits_left -= 8 * (thisrun_bytes);
 663                 }
 664         }
 665
 666         /* the most signifcant bit is scanned during TAP movement */
 667         if (type != SCAN_IN)
 668                 last_bit = ( buffer[cur_byte] >> (bits_left - 1) ) & 0x1;
 669         else
 670                 last_bit = 0;
 671
 672         /* process remaining bits but the last one */
 673         if (bits_left > 1)
 674         {
 675                 if (type == SCAN_IO)
 676                 {
 677                         /* Clock Data Bits In and Out LSB First */
 678                         BUFFER_ADD = 0x3b;
 679                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 680                 }
 681                 else if (type == SCAN_OUT)
 682                 {
 683                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 684                         BUFFER_ADD = 0x1b;
 685                         /* LOG_DEBUG("added TDI bits (o)"); */
 686                 }
 687                 else if (type == SCAN_IN)
 688                 {
 689                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 690                         BUFFER_ADD = 0x2a;
 691                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 692                 }
 693                 BUFFER_ADD = bits_left - 2;
 694                 if (type != SCAN_IN)
 695                         BUFFER_ADD = buffer[cur_byte];
 696         }
 697
 698         if ( (  ir_scan && (tap_get_end_state() == TAP_IRSHIFT) )
 699           || ( !ir_scan && (tap_get_end_state() == TAP_DRSHIFT) ) )
 700         {
 701                 if (type == SCAN_IO)
 702                 {
 703                         /* Clock Data Bits In and Out LSB First */
 704                         BUFFER_ADD = 0x3b;
 705                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 706                 }
 707                 else if (type == SCAN_OUT)
 708                 {
 709                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 710                         BUFFER_ADD = 0x1b;
 711                         /* LOG_DEBUG("added TDI bits (o)"); */
 712                 }
 713                 else if (type == SCAN_IN)
 714                 {
 715                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 716                         BUFFER_ADD = 0x2a;
 717                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 718                 }
 719                 BUFFER_ADD = 0x0;
 720                 BUFFER_ADD = last_bit;
 721         }
 722         else
 723         {
 724                 /* move from Shift-IR/DR to end state */
 725                 if (type != SCAN_OUT)
 726                 {
 727                         /* Clock Data to TMS/CS Pin with Read */
 728                         BUFFER_ADD = 0x6b;
 729                         /* LOG_DEBUG("added TMS scan (read)"); */
 730                 }
 731                 else
 732                 {
 733                         /* Clock Data to TMS/CS Pin (no Read) */
 734                         BUFFER_ADD = 0x4b;
 735                         /* LOG_DEBUG("added TMS scan (no read)"); */
 736                 }
 737                 BUFFER_ADD = 0x6;   /* scan 7 bits */
 738
 739                 BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() ) | (last_bit << 7);
 740                 tap_set_state( tap_get_end_state() );
 741         }
 742 }
 743
 744
 745 int ft2232_large_scan(scan_command_t* cmd, enum scan_type type, u8* buffer, int scan_size)
 746 {
 747         int num_bytes = (scan_size + 7) / 8;
 748         int bits_left = scan_size;
 749         int cur_byte  = 0;
 750         int last_bit;
 751         u8* receive_buffer  = malloc( CEIL(scan_size, 8) );
 752         u8* receive_pointer = receive_buffer;
 753         u32 bytes_written;
 754         u32 bytes_read;
 755         int retval;
 756         int thisrun_read = 0;
 757
 758         if (cmd->ir_scan)
 759         {
 760                 LOG_ERROR("BUG: large IR scans are not supported");
 761                 exit(-1);
 762         }
 763
 764         if (tap_get_state() != TAP_DRSHIFT)
 765         {
 766                 /* command "Clock Data to TMS/CS Pin (no Read)" */
 767                 BUFFER_ADD = 0x4b;
 768
 769                 BUFFER_ADD = 0x6;       /* scan 7 bits */
 770
 771                 /* TMS data bits */
 772                 BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_DRSHIFT);
 773                 tap_set_state(TAP_DRSHIFT);
 774         }
 775
 776         if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
 777         {
 778                 LOG_ERROR("couldn't write MPSSE commands to FT2232");
 779                 exit(-1);
 780         }
 781         LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 782         ft2232_buffer_size = 0;
 783
 784         /* add command for complete bytes */
 785         while (num_bytes > 1)
 786         {
 787                 int thisrun_bytes;
 788
 789                 if (type == SCAN_IO)
 790                 {
 791                         /* Clock Data Bytes In and Out LSB First */
 792                         BUFFER_ADD = 0x39;
 793                         /* LOG_DEBUG("added TDI bytes (io %i)", num_bytes); */
 794                 }
 795                 else if (type == SCAN_OUT)
 796                 {
 797                         /* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
 798                         BUFFER_ADD = 0x19;
 799                         /* LOG_DEBUG("added TDI bytes (o)"); */
 800                 }
 801                 else if (type == SCAN_IN)
 802                 {
 803                         /* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
 804                         BUFFER_ADD = 0x28;
 805                         /* LOG_DEBUG("added TDI bytes (i %i)", num_bytes); */
 806                 }
 807
 808                 thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
 809                 thisrun_read  = thisrun_bytes;
 810                 num_bytes    -= thisrun_bytes;
 811                 BUFFER_ADD    = (thisrun_bytes - 1) & 0xff;
 812                 BUFFER_ADD    = ( (thisrun_bytes - 1) >> 8 ) & 0xff;
 813
 814                 if (type != SCAN_IN)
 815                 {
 816                         /* add complete bytes */
 817                         while (thisrun_bytes-- > 0)
 818                         {
 819                                 BUFFER_ADD = buffer[cur_byte];
 820                                 cur_byte++;
 821                                 bits_left -= 8;
 822                         }
 823                 }
 824                 else /* (type == SCAN_IN) */
 825                 {
 826                         bits_left -= 8 * (thisrun_bytes);
 827                 }
 828
 829                 if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
 830                 {
 831                         LOG_ERROR("couldn't write MPSSE commands to FT2232");
 832                         exit(-1);
 833                 }
 834                 LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 835                 ft2232_buffer_size = 0;
 836
 837                 if (type != SCAN_OUT)
 838                 {
 839                         if ( ( retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read) ) != ERROR_OK )
 840                         {
 841                                 LOG_ERROR("couldn't read from FT2232");
 842                                 exit(-1);
 843                         }
 844                         LOG_DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
 845                         receive_pointer += bytes_read;
 846                 }
 847         }
 848
 849         thisrun_read = 0;
 850
 851         /* the most signifcant bit is scanned during TAP movement */
 852         if (type != SCAN_IN)
 853                 last_bit = ( buffer[cur_byte] >> (bits_left - 1) ) & 0x1;
 854         else
 855                 last_bit = 0;
 856
 857         /* process remaining bits but the last one */
 858         if (bits_left > 1)
 859         {
 860                 if (type == SCAN_IO)
 861                 {
 862                         /* Clock Data Bits In and Out LSB First */
 863                         BUFFER_ADD = 0x3b;
 864                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 865                 }
 866                 else if (type == SCAN_OUT)
 867                 {
 868                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 869                         BUFFER_ADD = 0x1b;
 870                         /* LOG_DEBUG("added TDI bits (o)"); */
 871                 }
 872                 else if (type == SCAN_IN)
 873                 {
 874                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 875                         BUFFER_ADD = 0x2a;
 876                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 877                 }
 878                 BUFFER_ADD = bits_left - 2;
 879                 if (type != SCAN_IN)
 880                         BUFFER_ADD = buffer[cur_byte];
 881
 882                 if (type != SCAN_OUT)
 883                         thisrun_read += 2;
 884         }
 885
 886         if (tap_get_end_state() == TAP_DRSHIFT)
 887         {
 888                 if (type == SCAN_IO)
 889                 {
 890                         /* Clock Data Bits In and Out LSB First */
 891                         BUFFER_ADD = 0x3b;
 892                         /* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
 893                 }
 894                 else if (type == SCAN_OUT)
 895                 {
 896                         /* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
 897                         BUFFER_ADD = 0x1b;
 898                         /* LOG_DEBUG("added TDI bits (o)"); */
 899                 }
 900                 else if (type == SCAN_IN)
 901                 {
 902                         /* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
 903                         BUFFER_ADD = 0x2a;
 904                         /* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
 905                 }
 906                 BUFFER_ADD = 0x0;
 907                 BUFFER_ADD = last_bit;
 908         }
 909         else
 910         {
 911                 /* move from Shift-IR/DR to end state */
 912                 if (type != SCAN_OUT)
 913                 {
 914                         /* Clock Data to TMS/CS Pin with Read */
 915                         BUFFER_ADD = 0x6b;
 916                         /* LOG_DEBUG("added TMS scan (read)"); */
 917                 }
 918                 else
 919                 {
 920                         /* Clock Data to TMS/CS Pin (no Read) */
 921                         BUFFER_ADD = 0x4b;
 922                         /* LOG_DEBUG("added TMS scan (no read)"); */
 923                 }
 924                 BUFFER_ADD = 0x6;
 925                 BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() ) | (last_bit << 7);
 926                 tap_set_state( tap_get_end_state() );
 927         }
 928
 929         if (type != SCAN_OUT)
 930                 thisrun_read += 1;
 931
 932         if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
 933         {
 934                 LOG_ERROR("couldn't write MPSSE commands to FT2232");
 935                 exit(-1);
 936         }
 937         LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
 938         ft2232_buffer_size = 0;
 939
 940         if (type != SCAN_OUT)
 941         {
 942                 if ( ( retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read) ) != ERROR_OK )
 943                 {
 944                         LOG_ERROR("couldn't read from FT2232");
 945                         exit(-1);
 946                 }
 947                 LOG_DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
 948                 receive_pointer += bytes_read;
 949         }
 950
 951         return ERROR_OK;
 952 }
 953
 954
 955 int ft2232_predict_scan_out(int scan_size, enum scan_type type)
 956 {
 957         int predicted_size = 3;
 958         int num_bytes = (scan_size - 1) / 8;
 959
 960         if (tap_get_state() != TAP_DRSHIFT)
 961                 predicted_size += 3;
 962
 963         if (type == SCAN_IN)    /* only from device to host */
 964         {
 965                 /* complete bytes */
 966                 predicted_size += CEIL(num_bytes, 65536) * 3;
 967                 /* remaining bits - 1 (up to 7) */
 968                 predicted_size += ( (scan_size - 1) % 8 ) ? 2 : 0;
 969         }
 970         else                    /* host to device, or bidirectional */
 971         {
 972                 /* complete bytes */
 973                 predicted_size += num_bytes + CEIL(num_bytes, 65536) * 3;
 974                 /* remaining bits -1 (up to 7) */
 975                 predicted_size += ( (scan_size - 1) % 8 ) ? 3 : 0;
 976         }
 977
 978         return predicted_size;
 979 }
 980
 981
 982 int ft2232_predict_scan_in(int scan_size, enum scan_type type)
 983 {
 984         int predicted_size = 0;
 985
 986         if (type != SCAN_OUT)
 987         {
 988                 /* complete bytes */
 989                 predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) - 1) : 0;
 990
 991                 /* remaining bits - 1 */
 992                 predicted_size += ( (scan_size - 1) % 8 ) ? 1 : 0;
 993
 994                 /* last bit (from TMS scan) */
 995                 predicted_size += 1;
 996         }
 997
 998         /* LOG_DEBUG("scan_size: %i, predicted_size: %i", scan_size, predicted_size); */
 999
1000         return predicted_size;
1001 }
1002
1003
1004 void usbjtag_reset(int trst, int srst)
1005 {
1006         if (trst == 1)
1007         {
1008                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1009                         low_direction |= nTRSTnOE;  /* switch to output pin (output is low) */
1010                 else
1011                         low_output &= ~nTRST;       /* switch output low */
1012         }
1013         else if (trst == 0)
1014         {
1015                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1016                         low_direction &= ~nTRSTnOE; /* switch to input pin (high-Z + internal and external pullup) */
1017                 else
1018                         low_output |= nTRST;        /* switch output high */
1019         }
1020
1021         if (srst == 1)
1022         {
1023                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1024                         low_output &= ~nSRST;       /* switch output low */
1025                 else
1026                         low_direction |= nSRSTnOE;  /* switch to output pin (output is low) */
1027         }
1028         else if (srst == 0)
1029         {
1030                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1031                         low_output |= nSRST;        /* switch output high */
1032                 else
1033                         low_direction &= ~nSRSTnOE; /* switch to input pin (high-Z) */
1034         }
1035
1036         /* command "set data bits low byte" */
1037         BUFFER_ADD = 0x80;
1038         BUFFER_ADD = low_output;
1039         BUFFER_ADD = low_direction;
1040 }
1041
1042
1043 void jtagkey_reset(int trst, int srst)
1044 {
1045         if (trst == 1)
1046         {
1047                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1048                         high_output &= ~nTRSTnOE;
1049                 else
1050                         high_output &= ~nTRST;
1051         }
1052         else if (trst == 0)
1053         {
1054                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1055                         high_output |= nTRSTnOE;
1056                 else
1057                         high_output |= nTRST;
1058         }
1059
1060         if (srst == 1)
1061         {
1062                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1063                         high_output &= ~nSRST;
1064                 else
1065                         high_output &= ~nSRSTnOE;
1066         }
1067         else if (srst == 0)
1068         {
1069                 if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1070                         high_output |= nSRST;
1071                 else
1072                         high_output |= nSRSTnOE;
1073         }
1074
1075         /* command "set data bits high byte" */
1076         BUFFER_ADD = 0x82;
1077         BUFFER_ADD = high_output;
1078         BUFFER_ADD = high_direction;
1079         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
1080                         high_direction);
1081 }
1082
1083
1084 void olimex_jtag_reset(int trst, int srst)
1085 {
1086         if (trst == 1)
1087         {
1088                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1089                         high_output &= ~nTRSTnOE;
1090                 else
1091                         high_output &= ~nTRST;
1092         }
1093         else if (trst == 0)
1094         {
1095                 if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1096                         high_output |= nTRSTnOE;
1097                 else
1098                         high_output |= nTRST;
1099         }
1100
1101         if (srst == 1)
1102         {
1103                 high_output |= nSRST;
1104         }
1105         else if (srst == 0)
1106         {
1107                 high_output &= ~nSRST;
1108         }
1109
1110         /* command "set data bits high byte" */
1111         BUFFER_ADD = 0x82;
1112         BUFFER_ADD = high_output;
1113         BUFFER_ADD = high_direction;
1114         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
1115                         high_direction);
1116 }
1117
1118
1119 void axm0432_jtag_reset(int trst, int srst)
1120 {
1121         if (trst == 1)
1122         {
1123                 tap_set_state(TAP_RESET);
1124                 high_output &= ~nTRST;
1125         }
1126         else if (trst == 0)
1127         {
1128                 high_output |= nTRST;
1129         }
1130
1131         if (srst == 1)
1132         {
1133                 high_output &= ~nSRST;
1134         }
1135         else if (srst == 0)
1136         {
1137                 high_output |= nSRST;
1138         }
1139
1140         /* command "set data bits low byte" */
1141         BUFFER_ADD = 0x82;
1142         BUFFER_ADD = high_output;
1143         BUFFER_ADD = high_direction;
1144         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
1145                         high_direction);
1146 }
1147
1148
1149 void flyswatter_reset(int trst, int srst)
1150 {
1151         if (trst == 1)
1152         {
1153                 low_output &= ~nTRST;
1154         }
1155         else if (trst == 0)
1156         {
1157                 low_output |= nTRST;
1158         }
1159
1160         if (srst == 1)
1161         {
1162                 low_output |= nSRST;
1163         }
1164         else if (srst == 0)
1165         {
1166                 low_output &= ~nSRST;
1167         }
1168
1169         /* command "set data bits low byte" */
1170         BUFFER_ADD = 0x80;
1171         BUFFER_ADD = low_output;
1172         BUFFER_ADD = low_direction;
1173         LOG_DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", trst, srst, low_output, low_direction);
1174 }
1175
1176
1177 void turtle_reset(int trst, int srst)
1178 {
1179         trst = trst;
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         LOG_DEBUG("srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", srst, low_output, low_direction);
1195 }
1196
1197
1198 void comstick_reset(int trst, int srst)
1199 {
1200         if (trst == 1)
1201         {
1202                 high_output &= ~nTRST;
1203         }
1204         else if (trst == 0)
1205         {
1206                 high_output |= nTRST;
1207         }
1208
1209         if (srst == 1)
1210         {
1211                 high_output &= ~nSRST;
1212         }
1213         else if (srst == 0)
1214         {
1215                 high_output |= nSRST;
1216         }
1217
1218         /* command "set data bits high byte" */
1219         BUFFER_ADD = 0x82;
1220         BUFFER_ADD = high_output;
1221         BUFFER_ADD = high_direction;
1222         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
1223                         high_direction);
1224 }
1225
1226
1227 void stm32stick_reset(int trst, int srst)
1228 {
1229         if (trst == 1)
1230         {
1231                 high_output &= ~nTRST;
1232         }
1233         else if (trst == 0)
1234         {
1235                 high_output |= nTRST;
1236         }
1237
1238         if (srst == 1)
1239         {
1240                 low_output &= ~nSRST;
1241         }
1242         else if (srst == 0)
1243         {
1244                 low_output |= nSRST;
1245         }
1246
1247         /* command "set data bits low byte" */
1248         BUFFER_ADD = 0x80;
1249         BUFFER_ADD = low_output;
1250         BUFFER_ADD = low_direction;
1251
1252         /* command "set data bits high byte" */
1253         BUFFER_ADD = 0x82;
1254         BUFFER_ADD = high_output;
1255         BUFFER_ADD = high_direction;
1256         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
1257                         high_direction);
1258 }
1259
1260
1261
1262 void sheevaplug_reset(int trst, int srst)
1263 {
1264         if (trst == 1)
1265                 high_output &= ~nTRST;
1266         else if (trst == 0)
1267                 high_output |= nTRST;
1268
1269         if (srst == 1)
1270                 high_output &= ~nSRSTnOE;
1271         else if (srst == 0)
1272                 high_output |= nSRSTnOE;
1273
1274         /* command "set data bits high byte" */
1275         BUFFER_ADD = 0x82;
1276         BUFFER_ADD = high_output;
1277         BUFFER_ADD = high_direction;
1278         LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
1279 }
1280
1281 int ft2232_execute_queue()
1282 {
1283         jtag_command_t* cmd = jtag_command_queue;   /* currently processed command */
1284         u8*             buffer;
1285         int             scan_size;                  /* size of IR or DR scan */
1286         enum scan_type  type;
1287         int             i;
1288         int             predicted_size = 0;
1289         int             retval;
1290
1291         first_unsent = cmd;         /* next command that has to be sent */
1292         require_send = 0;
1293
1294         /* return ERROR_OK, unless ft2232_send_and_recv reports a failed check
1295          * that wasn't handled by a caller-provided error handler
1296          */
1297         retval = ERROR_OK;
1298
1299         ft2232_buffer_size = 0;
1300         ft2232_expect_read = 0;
1301
1302         /* blink, if the current layout has that feature */
1303         if (layout->blink)
1304                 layout->blink();
1305
1306         while (cmd)
1307         {
1308                 switch (cmd->type)
1309                 {
1310                 case JTAG_END_STATE:
1311                         if (cmd->cmd.end_state->end_state != TAP_INVALID)
1312                                 ft2232_end_state(cmd->cmd.end_state->end_state);
1313                         break;
1314
1315                 case JTAG_RESET:
1316                         /* only send the maximum buffer size that FT2232C can handle */
1317                         predicted_size = 3;
1318                         if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1319                         {
1320                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1321                                         retval = ERROR_JTAG_QUEUE_FAILED;
1322                                 require_send = 0;
1323                                 first_unsent = cmd;
1324                         }
1325
1326                         if ( (cmd->cmd.reset->trst == 1) || ( cmd->cmd.reset->srst && (jtag_reset_config & RESET_SRST_PULLS_TRST) ) )
1327                         {
1328                                 tap_set_state(TAP_RESET);
1329                         }
1330                         layout->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
1331                         require_send = 1;
1332
1333 #ifdef _DEBUG_JTAG_IO_
1334                         LOG_DEBUG("trst: %i, srst: %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
1335 #endif
1336                         break;
1337
1338                 case JTAG_RUNTEST:
1339                         /* only send the maximum buffer size that FT2232C can handle */
1340                         predicted_size = 0;
1341                         if (tap_get_state() != TAP_IDLE)
1342                                 predicted_size += 3;
1343                         predicted_size += 3 * CEIL(cmd->cmd.runtest->num_cycles, 7);
1344                         if ( (cmd->cmd.runtest->end_state != TAP_INVALID) && (cmd->cmd.runtest->end_state != TAP_IDLE) )
1345                                 predicted_size += 3;
1346                         if ( (cmd->cmd.runtest->end_state == TAP_INVALID) && (tap_get_end_state() != TAP_IDLE) )
1347                                 predicted_size += 3;
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                         if (tap_get_state() != TAP_IDLE)
1356                         {
1357                                 /* command "Clock Data to TMS/CS Pin (no Read)" */
1358                                 BUFFER_ADD = 0x4b;
1359                                 BUFFER_ADD = 0x6;    /* scan 7 bits */
1360
1361                                 /* TMS data bits */
1362                                 BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_IDLE);
1363                                 tap_set_state(TAP_IDLE);
1364                                 require_send = 1;
1365                         }
1366                         i = cmd->cmd.runtest->num_cycles;
1367                         while (i > 0)
1368                         {
1369                                 /* command "Clock Data to TMS/CS Pin (no Read)" */
1370                                 BUFFER_ADD = 0x4b;
1371
1372                                 /* scan 7 bits */
1373                                 BUFFER_ADD = (i > 7) ? 6 : (i - 1);
1374
1375                                 /* TMS data bits */
1376                                 BUFFER_ADD = 0x0;
1377                                 tap_set_state(TAP_IDLE);
1378                                 i -= (i > 7) ? 7 : i;
1379                                 /* LOG_DEBUG("added TMS scan (no read)"); */
1380                         }
1381
1382                         if (cmd->cmd.runtest->end_state != TAP_INVALID)
1383                                 ft2232_end_state(cmd->cmd.runtest->end_state);
1384
1385                         if ( tap_get_state() != tap_get_end_state() )
1386                         {
1387                                 /* command "Clock Data to TMS/CS Pin (no Read)" */
1388                                 BUFFER_ADD = 0x4b;
1389                                 /* scan 7 bit */
1390                                 BUFFER_ADD = 0x6;
1391                                 /* TMS data bits */
1392                                 BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() );
1393                                 tap_set_state( tap_get_end_state() );
1394                                 /* LOG_DEBUG("added TMS scan (no read)"); */
1395                         }
1396                         require_send = 1;
1397 #ifdef _DEBUG_JTAG_IO_
1398                         LOG_DEBUG( "runtest: %i, end in %s", cmd->cmd.runtest->num_cycles, tap_state_name( tap_get_end_state() ) );
1399 #endif
1400                         break;
1401
1402                 case JTAG_STATEMOVE:
1403                         /* only send the maximum buffer size that FT2232C can handle */
1404                         predicted_size = 3;
1405                         if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1406                         {
1407                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1408                                         retval = ERROR_JTAG_QUEUE_FAILED;
1409                                 require_send = 0;
1410                                 first_unsent = cmd;
1411                         }
1412                         if (cmd->cmd.statemove->end_state != TAP_INVALID)
1413                                 ft2232_end_state(cmd->cmd.statemove->end_state);
1414
1415                         /* command "Clock Data to TMS/CS Pin (no Read)" */
1416                         BUFFER_ADD = 0x4b;
1417
1418                         BUFFER_ADD = 0x6;       /* scan 7 bits */
1419
1420                         /* TMS data bits */
1421                         BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() );
1422                         /* LOG_DEBUG("added TMS scan (no read)"); */
1423                         tap_set_state( tap_get_end_state() );
1424                         require_send = 1;
1425 #ifdef _DEBUG_JTAG_IO_
1426                         LOG_DEBUG( "statemove: %s", tap_state_name( tap_get_end_state() ) );
1427 #endif
1428                         break;
1429
1430                 case JTAG_PATHMOVE:
1431                         /* only send the maximum buffer size that FT2232C can handle */
1432                         predicted_size = 3 * CEIL(cmd->cmd.pathmove->num_states, 7);
1433                         if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1434                         {
1435                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1436                                         retval = ERROR_JTAG_QUEUE_FAILED;
1437                                 require_send = 0;
1438                                 first_unsent = cmd;
1439                         }
1440                         ft2232_add_pathmove(cmd->cmd.pathmove);
1441                         require_send = 1;
1442 #ifdef _DEBUG_JTAG_IO_
1443                         LOG_DEBUG( "pathmove: %i states, end in %s", cmd->cmd.pathmove->num_states,
1444                                         tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]) );
1445 #endif
1446                         break;
1447
1448                 case JTAG_SCAN:
1449                         scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
1450                         type = jtag_scan_type(cmd->cmd.scan);
1451                         predicted_size = ft2232_predict_scan_out(scan_size, type);
1452                         if ( (predicted_size + 1) > FT2232_BUFFER_SIZE )
1453                         {
1454                                 LOG_DEBUG("oversized ft2232 scan (predicted_size > FT2232_BUFFER_SIZE)");
1455                                 /* unsent commands before this */
1456                                 if (first_unsent != cmd)
1457                                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1458                                                 retval = ERROR_JTAG_QUEUE_FAILED;
1459
1460                                 /* current command */
1461                                 if (cmd->cmd.scan->end_state != TAP_INVALID)
1462                                         ft2232_end_state(cmd->cmd.scan->end_state);
1463                                 ft2232_large_scan(cmd->cmd.scan, type, buffer, scan_size);
1464                                 require_send = 0;
1465                                 first_unsent = cmd->next;
1466                                 if (buffer)
1467                                         free(buffer);
1468                                 break;
1469                         }
1470                         else if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
1471                         {
1472                                 LOG_DEBUG("ft2232 buffer size reached, sending queued commands (first_unsent: %p, cmd: %p)",
1473                                                 first_unsent,
1474                                                 cmd);
1475                                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1476                                         retval = ERROR_JTAG_QUEUE_FAILED;
1477                                 require_send = 0;
1478                                 first_unsent = cmd;
1479                         }
1480                         ft2232_expect_read += ft2232_predict_scan_in(scan_size, type);
1481                         /* LOG_DEBUG("new read size: %i", ft2232_expect_read); */
1482                         if (cmd->cmd.scan->end_state != TAP_INVALID)
1483                                 ft2232_end_state(cmd->cmd.scan->end_state);
1484                         ft2232_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
1485                         require_send = 1;
1486                         if (buffer)
1487                                 free(buffer);
1488 #ifdef _DEBUG_JTAG_IO_
1489                         LOG_DEBUG( "%s scan, %i bits, end in %s", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
1490                                         tap_state_name( tap_get_end_state() ) );
1491 #endif
1492                         break;
1493
1494                 case JTAG_SLEEP:
1495                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1496                                 retval = ERROR_JTAG_QUEUE_FAILED;
1497                         first_unsent = cmd->next;
1498                         jtag_sleep(cmd->cmd.sleep->us);
1499 #ifdef _DEBUG_JTAG_IO_
1500                         LOG_DEBUG( "sleep %i usec while in %s", cmd->cmd.sleep->us, tap_state_name( tap_get_state() ) );
1501 #endif
1502                         break;
1503
1504                 case JTAG_STABLECLOCKS:
1505
1506                         /* this is only allowed while in a stable state.  A check for a stable
1507                          * state was done in jtag_add_clocks()
1508                          */
1509                         if (ft2232_stableclocks(cmd->cmd.stableclocks->num_cycles, cmd) != ERROR_OK)
1510                                 retval = ERROR_JTAG_QUEUE_FAILED;
1511 #ifdef _DEBUG_JTAG_IO_
1512                         LOG_DEBUG( "clocks %i while in %s", cmd->cmd.stableclocks->num_cycles, tap_state_name( tap_get_state() ) );
1513 #endif
1514                         break;
1515
1516                 default:
1517                         LOG_ERROR("BUG: unknown JTAG command type encountered");
1518                         exit(-1);
1519                 }
1520
1521                 cmd = cmd->next;
1522         }
1523
1524         if (require_send > 0)
1525                 if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
1526                         retval = ERROR_JTAG_QUEUE_FAILED;
1527
1528         return retval;
1529 }
1530
1531
1532 #if BUILD_FT2232_FTD2XX == 1
1533 static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int* try_more)
1534 {
1535         FT_STATUS status;
1536         DWORD     openex_flags  = 0;
1537         char*     openex_string = NULL;
1538         u8        latency_timer;
1539
1540         LOG_DEBUG("'ft2232' interface using FTD2XX with '%s' layout (%4.4x:%4.4x)", ft2232_layout, vid, pid);
1541
1542 #if IS_WIN32 == 0
1543         /* Add non-standard Vid/Pid to the linux driver */
1544         if ( ( status = FT_SetVIDPID(vid, pid) ) != FT_OK )
1545         {
1546                 LOG_WARNING("couldn't add %4.4x:%4.4x", vid, pid);
1547         }
1548 #endif
1549
1550         if (ft2232_device_desc && ft2232_serial)
1551         {
1552                 LOG_WARNING("can't open by device description and serial number, giving precedence to serial");
1553                 ft2232_device_desc = NULL;
1554         }
1555
1556         if (ft2232_device_desc)
1557         {
1558                 openex_string = ft2232_device_desc;
1559                 openex_flags  = FT_OPEN_BY_DESCRIPTION;
1560         }
1561         else if (ft2232_serial)
1562         {
1563                 openex_string = ft2232_serial;
1564                 openex_flags  = FT_OPEN_BY_SERIAL_NUMBER;
1565         }
1566         else
1567         {
1568                 LOG_ERROR("neither device description nor serial number specified");
1569                 LOG_ERROR("please add \"ft2232_device_desc <string>\" or \"ft2232_serial <string>\" to your .cfg file");
1570
1571                 return ERROR_JTAG_INIT_FAILED;
1572         }
1573
1574         status = FT_OpenEx(openex_string, openex_flags, &ftdih);
1575         if( status != FT_OK ){
1576                 // under Win32, the FTD2XX driver appends an "A" to the end
1577                 // of the description, if we tried by the desc, then
1578                 // try by the alternate "A" description.
1579                 if( openex_string == ft2232_device_desc ){
1580                         // Try the alternate method.
1581                         openex_string = ft2232_device_desc_A;
1582                         status = FT_OpenEx(openex_string, openex_flags, &ftdih);
1583                         if( status == FT_OK ){
1584                                 // yea, the "alternate" method worked!
1585                         } else {
1586                                 // drat, give the user a meaningfull message.
1587                                 // telling the use we tried *BOTH* methods.
1588                                 LOG_WARNING("Unable to open FTDI Device tried: '%s' and '%s'\n",
1589                                                         ft2232_device_desc,
1590                                                         ft2232_device_desc_A );
1591                         }
1592                 }
1593         }
1594
1595         if ( status != FT_OK )
1596         {
1597                 DWORD num_devices;
1598
1599                 if (more)
1600                 {
1601                         LOG_WARNING("unable to open ftdi device (trying more): %lu", status);
1602                         *try_more = 1;
1603                         return ERROR_JTAG_INIT_FAILED;
1604                 }
1605                 LOG_ERROR("unable to open ftdi device: %lu", status);
1606                 status = FT_ListDevices(&num_devices, NULL, FT_LIST_NUMBER_ONLY);
1607                 if (status == FT_OK)
1608                 {
1609                         char** desc_array = malloc( sizeof(char*) * (num_devices + 1) );
1610                         u32 i;
1611
1612                         for (i = 0; i < num_devices; i++)
1613                                 desc_array[i] = malloc(64);
1614
1615                         desc_array[num_devices] = NULL;
1616
1617                         status = FT_ListDevices(desc_array, &num_devices, FT_LIST_ALL | openex_flags);
1618
1619                         if (status == FT_OK)
1620                         {
1621                                 LOG_ERROR("ListDevices: %lu\n", num_devices);
1622                                 for (i = 0; i < num_devices; i++)
1623                                         LOG_ERROR("%i: \"%s\"", i, desc_array[i]);
1624                         }
1625
1626                         for (i = 0; i < num_devices; i++)
1627                                 free(desc_array[i]);
1628
1629                         free(desc_array);
1630                 }
1631                 else
1632                 {
1633                         LOG_ERROR("ListDevices: NONE\n");
1634                 }
1635                 return ERROR_JTAG_INIT_FAILED;
1636         }
1637
1638         if ( ( status = FT_SetLatencyTimer(ftdih, ft2232_latency) ) != FT_OK )
1639         {
1640                 LOG_ERROR("unable to set latency timer: %lu", status);
1641                 return ERROR_JTAG_INIT_FAILED;
1642         }
1643
1644         if ( ( status = FT_GetLatencyTimer(ftdih, &latency_timer) ) != FT_OK )
1645         {
1646                 LOG_ERROR("unable to get latency timer: %lu", status);
1647                 return ERROR_JTAG_INIT_FAILED;
1648         }
1649         else
1650         {
1651                 LOG_DEBUG("current latency timer: %i", latency_timer);
1652         }
1653
1654         if ( ( status = FT_SetTimeouts(ftdih, 5000, 5000) ) != FT_OK )
1655         {
1656                 LOG_ERROR("unable to set timeouts: %lu", status);
1657                 return ERROR_JTAG_INIT_FAILED;
1658         }
1659
1660         if ( ( status = FT_SetBitMode(ftdih, 0x0b, 2) ) != FT_OK )
1661         {
1662                 LOG_ERROR("unable to enable bit i/o mode: %lu", status);
1663                 return ERROR_JTAG_INIT_FAILED;
1664         }
1665
1666         return ERROR_OK;
1667 }
1668
1669
1670 static int ft2232_purge_ftd2xx(void)
1671 {
1672         FT_STATUS status;
1673
1674         if ( ( status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX) ) != FT_OK )
1675         {
1676                 LOG_ERROR("error purging ftd2xx device: %lu", status);
1677                 return ERROR_JTAG_INIT_FAILED;
1678         }
1679
1680         return ERROR_OK;
1681 }
1682
1683
1684 #endif /* BUILD_FT2232_FTD2XX == 1 */
1685
1686 #if BUILD_FT2232_LIBFTDI == 1
1687 static int ft2232_init_libftdi(u16 vid, u16 pid, int more, int* try_more)
1688 {
1689         u8 latency_timer;
1690
1691         LOG_DEBUG("'ft2232' interface using libftdi with '%s' layout (%4.4x:%4.4x)",
1692                         ft2232_layout, vid, pid);
1693
1694         if (ftdi_init(&ftdic) < 0)
1695                 return ERROR_JTAG_INIT_FAILED;
1696
1697         /* context, vendor id, product id */
1698         if (ftdi_usb_open_desc(&ftdic, vid, pid, ft2232_device_desc,
1699                                 ft2232_serial) < 0)
1700         {
1701                 if (more)
1702                         LOG_WARNING("unable to open ftdi device (trying more): %s",
1703                                         ftdic.error_str);
1704                 else
1705                         LOG_ERROR("unable to open ftdi device: %s", ftdic.error_str);
1706                 *try_more = 1;
1707                 return ERROR_JTAG_INIT_FAILED;
1708         }
1709
1710         if (ftdi_set_interface(&ftdic, INTERFACE_A) < 0)
1711         {
1712                 LOG_ERROR("unable to select FT2232 channel A: %s", ftdic.error_str);
1713                 return ERROR_JTAG_INIT_FAILED;
1714         }
1715
1716         if (ftdi_usb_reset(&ftdic) < 0)
1717         {
1718                 LOG_ERROR("unable to reset ftdi device");
1719                 return ERROR_JTAG_INIT_FAILED;
1720         }
1721
1722         if (ftdi_set_latency_timer(&ftdic, ft2232_latency) < 0)
1723         {
1724                 LOG_ERROR("unable to set latency timer");
1725                 return ERROR_JTAG_INIT_FAILED;
1726         }
1727
1728         if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0)
1729         {
1730                 LOG_ERROR("unable to get latency timer");
1731                 return ERROR_JTAG_INIT_FAILED;
1732         }
1733         else
1734         {
1735                 LOG_DEBUG("current latency timer: %i", latency_timer);
1736         }
1737
1738         ftdi_set_bitmode(&ftdic, 0x0b, 2); /* ctx, JTAG I/O mask */
1739
1740         return ERROR_OK;
1741 }
1742
1743
1744 static int ft2232_purge_libftdi(void)
1745 {
1746         if (ftdi_usb_purge_buffers(&ftdic) < 0)
1747         {
1748                 LOG_ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
1749                 return ERROR_JTAG_INIT_FAILED;
1750         }
1751
1752         return ERROR_OK;
1753 }
1754
1755
1756 #endif /* BUILD_FT2232_LIBFTDI == 1 */
1757
1758 int ft2232_init(void)
1759 {
1760         u8  buf[1];
1761         int retval;
1762         u32 bytes_written;
1763         ft2232_layout_t* cur_layout = ft2232_layouts;
1764         int i;
1765
1766         if ( (ft2232_layout == NULL) || (ft2232_layout[0] == 0) )
1767         {
1768                 ft2232_layout = "usbjtag";
1769                 LOG_WARNING("No ft2232 layout specified, using default 'usbjtag'");
1770         }
1771
1772         while (cur_layout->name)
1773         {
1774                 if (strcmp(cur_layout->name, ft2232_layout) == 0)
1775                 {
1776                         layout = cur_layout;
1777                         break;
1778                 }
1779                 cur_layout++;
1780         }
1781
1782         if (!layout)
1783         {
1784                 LOG_ERROR("No matching layout found for %s", ft2232_layout);
1785                 return ERROR_JTAG_INIT_FAILED;
1786         }
1787
1788         for (i = 0; 1; i++)
1789         {
1790                 /*
1791                  * "more indicates that there are more IDs to try, so we should
1792                  * not print an error for an ID mismatch (but for anything
1793                  * else, we should).
1794                  *
1795                  * try_more indicates that the error code returned indicates an
1796                  * ID mismatch (and nothing else) and that we should proceeed
1797                  * with the next ID pair.
1798                  */
1799                 int more     = ft2232_vid[i + 1] || ft2232_pid[i + 1];
1800                 int try_more = 0;
1801
1802 #if BUILD_FT2232_FTD2XX == 1
1803                 retval = ft2232_init_ftd2xx(ft2232_vid[i], ft2232_pid[i],
1804                                 more, &try_more);
1805 #elif BUILD_FT2232_LIBFTDI == 1
1806                 retval = ft2232_init_libftdi(ft2232_vid[i], ft2232_pid[i],
1807                                 more, &try_more);
1808 #endif
1809                 if (retval >= 0)
1810                         break;
1811                 if (!more || !try_more)
1812                         return retval;
1813         }
1814
1815         ft2232_buffer_size = 0;
1816         ft2232_buffer = malloc(FT2232_BUFFER_SIZE);
1817
1818         if (layout->init() != ERROR_OK)
1819                 return ERROR_JTAG_INIT_FAILED;
1820
1821         ft2232_speed(jtag_speed);
1822
1823         buf[0] = 0x85; /* Disconnect TDI/DO to TDO/DI for Loopback */
1824         if ( ( ( retval = ft2232_write(buf, 1, &bytes_written) ) != ERROR_OK ) || (bytes_written != 1) )
1825         {
1826                 LOG_ERROR("couldn't write to FT2232 to disable loopback");
1827                 return ERROR_JTAG_INIT_FAILED;
1828         }
1829
1830 #if BUILD_FT2232_FTD2XX == 1
1831         return ft2232_purge_ftd2xx();
1832 #elif BUILD_FT2232_LIBFTDI == 1
1833         return ft2232_purge_libftdi();
1834 #endif
1835
1836         return ERROR_OK;
1837 }
1838
1839
1840 int usbjtag_init(void)
1841 {
1842         u8  buf[3];
1843         u32 bytes_written;
1844
1845         low_output    = 0x08;
1846         low_direction = 0x0b;
1847
1848         if (strcmp(ft2232_layout, "usbjtag") == 0)
1849         {
1850                 nTRST    = 0x10;
1851                 nTRSTnOE = 0x10;
1852                 nSRST    = 0x40;
1853                 nSRSTnOE = 0x40;
1854         }
1855         else if (strcmp(ft2232_layout, "signalyzer") == 0)
1856         {
1857                 nTRST    = 0x10;
1858                 nTRSTnOE = 0x10;
1859                 nSRST    = 0x20;
1860                 nSRSTnOE = 0x20;
1861         }
1862         else if (strcmp(ft2232_layout, "evb_lm3s811") == 0)
1863         {
1864                 nTRST = 0x0;
1865                 nTRSTnOE = 0x00;
1866                 nSRST = 0x20;
1867                 nSRSTnOE = 0x20;
1868                 low_output    = 0x88;
1869                 low_direction = 0x8b;
1870         }
1871         else
1872         {
1873                 LOG_ERROR("BUG: usbjtag_init called for unknown layout '%s'", ft2232_layout);
1874                 return ERROR_JTAG_INIT_FAILED;
1875         }
1876
1877         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1878         {
1879                 low_direction &= ~nTRSTnOE; /* nTRST input */
1880                 low_output    &= ~nTRST;    /* nTRST = 0 */
1881         }
1882         else
1883         {
1884                 low_direction |= nTRSTnOE;  /* nTRST output */
1885                 low_output    |= nTRST;     /* nTRST = 1 */
1886         }
1887
1888         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1889         {
1890                 low_direction |= nSRSTnOE;  /* nSRST output */
1891                 low_output    |= nSRST;     /* nSRST = 1 */
1892         }
1893         else
1894         {
1895                 low_direction &= ~nSRSTnOE; /* nSRST input */
1896                 low_output    &= ~nSRST;    /* nSRST = 0 */
1897         }
1898
1899         /* initialize low byte for jtag */
1900         buf[0] = 0x80;          /* command "set data bits low byte" */
1901         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, xRST high) */
1902         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
1903         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1904
1905         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
1906         {
1907                 LOG_ERROR("couldn't initialize FT2232 with 'USBJTAG' layout");
1908                 return ERROR_JTAG_INIT_FAILED;
1909         }
1910
1911         return ERROR_OK;
1912 }
1913
1914
1915 int axm0432_jtag_init(void)
1916 {
1917         u8  buf[3];
1918         u32 bytes_written;
1919
1920         low_output    = 0x08;
1921         low_direction = 0x2b;
1922
1923         /* initialize low byte for jtag */
1924         buf[0] = 0x80;          /* command "set data bits low byte" */
1925         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1926         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1927         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1928
1929         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
1930         {
1931                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
1932                 return ERROR_JTAG_INIT_FAILED;
1933         }
1934
1935         if (strcmp(layout->name, "axm0432_jtag") == 0)
1936         {
1937                 nTRST    = 0x08;
1938                 nTRSTnOE = 0x0;     /* No output enable for TRST*/
1939                 nSRST    = 0x04;
1940                 nSRSTnOE = 0x0;     /* No output enable for SRST*/
1941         }
1942         else
1943         {
1944                 LOG_ERROR("BUG: axm0432_jtag_init called for non axm0432 layout");
1945                 exit(-1);
1946         }
1947
1948         high_output    = 0x0;
1949         high_direction = 0x0c;
1950
1951         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
1952         {
1953                 LOG_ERROR("can't set nTRSTOE to push-pull on the Dicarlo jtag");
1954         }
1955         else
1956         {
1957                 high_output |= nTRST;
1958         }
1959
1960         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
1961         {
1962                 LOG_ERROR("can't set nSRST to push-pull on the Dicarlo jtag");
1963         }
1964         else
1965         {
1966                 high_output |= nSRST;
1967         }
1968
1969         /* initialize high port */
1970         buf[0] = 0x82;              /* command "set data bits high byte" */
1971         buf[1] = high_output;       /* value */
1972         buf[2] = high_direction;    /* all outputs (xRST and xRSTnOE) */
1973         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1974
1975         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
1976         {
1977                 LOG_ERROR("couldn't initialize FT2232 with 'Dicarlo' layout");
1978                 return ERROR_JTAG_INIT_FAILED;
1979         }
1980
1981         return ERROR_OK;
1982 }
1983
1984
1985 int jtagkey_init(void)
1986 {
1987         u8  buf[3];
1988         u32 bytes_written;
1989
1990         low_output    = 0x08;
1991         low_direction = 0x1b;
1992
1993         /* initialize low byte for jtag */
1994         buf[0] = 0x80;          /* command "set data bits low byte" */
1995         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
1996         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
1997         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
1998
1999         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2000         {
2001                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
2002                 return ERROR_JTAG_INIT_FAILED;
2003         }
2004
2005         if (strcmp(layout->name, "jtagkey") == 0)
2006         {
2007                 nTRST    = 0x01;
2008                 nTRSTnOE = 0x4;
2009                 nSRST    = 0x02;
2010                 nSRSTnOE = 0x08;
2011         }
2012         else if ( (strcmp(layout->name, "jtagkey_prototype_v1") == 0)
2013                          || (strcmp(layout->name, "oocdlink") == 0) )
2014         {
2015                 nTRST    = 0x02;
2016                 nTRSTnOE = 0x1;
2017                 nSRST    = 0x08;
2018                 nSRSTnOE = 0x04;
2019         }
2020         else
2021         {
2022                 LOG_ERROR("BUG: jtagkey_init called for non jtagkey layout");
2023                 exit(-1);
2024         }
2025
2026         high_output    = 0x0;
2027         high_direction = 0x0f;
2028
2029         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
2030         {
2031                 high_output |= nTRSTnOE;
2032                 high_output &= ~nTRST;
2033         }
2034         else
2035         {
2036                 high_output &= ~nTRSTnOE;
2037                 high_output |= nTRST;
2038         }
2039
2040         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
2041         {
2042                 high_output &= ~nSRSTnOE;
2043                 high_output |= nSRST;
2044         }
2045         else
2046         {
2047                 high_output |= nSRSTnOE;
2048                 high_output &= ~nSRST;
2049         }
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 'JTAGkey' layout");
2060                 return ERROR_JTAG_INIT_FAILED;
2061         }
2062
2063         return ERROR_OK;
2064 }
2065
2066
2067 int olimex_jtag_init(void)
2068 {
2069         u8  buf[3];
2070         u32 bytes_written;
2071
2072         low_output    = 0x08;
2073         low_direction = 0x1b;
2074
2075         /* initialize low byte for jtag */
2076         buf[0] = 0x80;          /* command "set data bits low byte" */
2077         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2078         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2079         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2080
2081         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2082         {
2083                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
2084                 return ERROR_JTAG_INIT_FAILED;
2085         }
2086
2087         nTRST    = 0x01;
2088         nTRSTnOE = 0x4;
2089         nSRST    = 0x02;
2090         nSRSTnOE = 0x00; /* no output enable for nSRST */
2091
2092         high_output    = 0x0;
2093         high_direction = 0x0f;
2094
2095         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
2096         {
2097                 high_output |= nTRSTnOE;
2098                 high_output &= ~nTRST;
2099         }
2100         else
2101         {
2102                 high_output &= ~nTRSTnOE;
2103                 high_output |= nTRST;
2104         }
2105
2106         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
2107         {
2108                 LOG_ERROR("can't set nSRST to push-pull on the Olimex ARM-USB-OCD");
2109         }
2110         else
2111         {
2112                 high_output &= ~nSRST;
2113         }
2114
2115         /* turn red LED on */
2116         high_output |= 0x08;
2117
2118         /* initialize high port */
2119         buf[0] = 0x82;              /* command "set data bits high byte" */
2120         buf[1] = high_output;       /* value */
2121         buf[2] = high_direction;    /* all outputs (xRST and xRSTnOE) */
2122         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2123
2124         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2125         {
2126                 LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
2127                 return ERROR_JTAG_INIT_FAILED;
2128         }
2129
2130         return ERROR_OK;
2131 }
2132
2133
2134 int flyswatter_init(void)
2135 {
2136         u8  buf[3];
2137         u32 bytes_written;
2138
2139         low_output    = 0x18;
2140         low_direction = 0xfb;
2141
2142         /* initialize low byte for jtag */
2143         buf[0] = 0x80;          /* command "set data bits low byte" */
2144         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2145         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE[12]=out, n[ST]srst=out */
2146         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2147
2148         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2149         {
2150                 LOG_ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
2151                 return ERROR_JTAG_INIT_FAILED;
2152         }
2153
2154         nTRST    = 0x10;
2155         nTRSTnOE = 0x0;     /* not output enable for nTRST */
2156         nSRST    = 0x20;
2157         nSRSTnOE = 0x00;    /* no output enable for nSRST */
2158
2159         high_output    = 0x00;
2160         high_direction = 0x0c;
2161
2162         /* turn red LED3 on, LED2 off */
2163         high_output |= 0x08;
2164
2165         /* initialize high port */
2166         buf[0] = 0x82;              /* command "set data bits high byte" */
2167         buf[1] = high_output;       /* value */
2168         buf[2] = high_direction;    /* all outputs (xRST and xRSTnOE) */
2169         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2170
2171         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2172         {
2173                 LOG_ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
2174                 return ERROR_JTAG_INIT_FAILED;
2175         }
2176
2177         return ERROR_OK;
2178 }
2179
2180
2181 int turtle_init(void)
2182 {
2183         u8  buf[3];
2184         u32 bytes_written;
2185
2186         low_output    = 0x08;
2187         low_direction = 0x5b;
2188
2189         /* initialize low byte for jtag */
2190         buf[0] = 0x80;          /* command "set data bits low byte" */
2191         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2192         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2193         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2194
2195         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2196         {
2197                 LOG_ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
2198                 return ERROR_JTAG_INIT_FAILED;
2199         }
2200
2201         nSRST = 0x40;
2202
2203         high_output    = 0x00;
2204         high_direction = 0x0C;
2205
2206         /* initialize high port */
2207         buf[0] = 0x82; /* command "set data bits high byte" */
2208         buf[1] = high_output;
2209         buf[2] = high_direction;
2210         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2211
2212         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2213         {
2214                 LOG_ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
2215                 return ERROR_JTAG_INIT_FAILED;
2216         }
2217
2218         return ERROR_OK;
2219 }
2220
2221
2222 int comstick_init(void)
2223 {
2224         u8  buf[3];
2225         u32 bytes_written;
2226
2227         low_output    = 0x08;
2228         low_direction = 0x0b;
2229
2230         /* initialize low byte for jtag */
2231         buf[0] = 0x80;          /* command "set data bits low byte" */
2232         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2233         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2234         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2235
2236         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2237         {
2238                 LOG_ERROR("couldn't initialize FT2232 with 'comstick' layout");
2239                 return ERROR_JTAG_INIT_FAILED;
2240         }
2241
2242         nTRST    = 0x01;
2243         nTRSTnOE = 0x00;    /* no output enable for nTRST */
2244         nSRST    = 0x02;
2245         nSRSTnOE = 0x00;    /* no output enable for nSRST */
2246
2247         high_output    = 0x03;
2248         high_direction = 0x03;
2249
2250         /* initialize high port */
2251         buf[0] = 0x82; /* command "set data bits high byte" */
2252         buf[1] = high_output;
2253         buf[2] = high_direction;
2254         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2255
2256         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2257         {
2258                 LOG_ERROR("couldn't initialize FT2232 with 'comstick' layout");
2259                 return ERROR_JTAG_INIT_FAILED;
2260         }
2261
2262         return ERROR_OK;
2263 }
2264
2265
2266 int stm32stick_init(void)
2267 {
2268         u8  buf[3];
2269         u32 bytes_written;
2270
2271         low_output    = 0x88;
2272         low_direction = 0x8b;
2273
2274         /* initialize low byte for jtag */
2275         buf[0] = 0x80;          /* command "set data bits low byte" */
2276         buf[1] = low_output;    /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2277         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
2278         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2279
2280         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2281         {
2282                 LOG_ERROR("couldn't initialize FT2232 with 'stm32stick' layout");
2283                 return ERROR_JTAG_INIT_FAILED;
2284         }
2285
2286         nTRST    = 0x01;
2287         nTRSTnOE = 0x00;    /* no output enable for nTRST */
2288         nSRST    = 0x80;
2289         nSRSTnOE = 0x00;    /* no output enable for nSRST */
2290
2291         high_output    = 0x01;
2292         high_direction = 0x03;
2293
2294         /* initialize high port */
2295         buf[0] = 0x82; /* command "set data bits high byte" */
2296         buf[1] = high_output;
2297         buf[2] = high_direction;
2298         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2299
2300         if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
2301         {
2302                 LOG_ERROR("couldn't initialize FT2232 with 'stm32stick' layout");
2303                 return ERROR_JTAG_INIT_FAILED;
2304         }
2305
2306         return ERROR_OK;
2307 }
2308
2309
2310 int sheevaplug_init(void)
2311 {
2312         u8 buf[3];
2313         u32 bytes_written;
2314
2315         low_output = 0x08;
2316         low_direction = 0x1b;
2317
2318         /* initialize low byte for jtag */
2319         buf[0] = 0x80; /* command "set data bits low byte" */
2320         buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
2321         buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
2322         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2323
2324         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2325         {
2326                 LOG_ERROR("couldn't initialize FT2232 with 'sheevaplug' layout");
2327                 return ERROR_JTAG_INIT_FAILED;
2328         }
2329
2330         nTRSTnOE = 0x1;
2331         nTRST = 0x02;
2332         nSRSTnOE = 0x4;
2333         nSRST = 0x08;
2334
2335         high_output = 0x0;
2336         high_direction = 0x0f;
2337
2338         /* nTRST is always push-pull */
2339         high_output &= ~nTRSTnOE;
2340         high_output |= nTRST;
2341
2342         /* nSRST is always open-drain */
2343         high_output |= nSRSTnOE;
2344         high_output &= ~nSRST;
2345
2346         /* initialize high port */
2347         buf[0] = 0x82; /* command "set data bits high byte" */
2348         buf[1] = high_output; /* value */
2349         buf[2] = high_direction;   /* all outputs - xRST */
2350         LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
2351
2352         if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
2353         {
2354                 LOG_ERROR("couldn't initialize FT2232 with 'sheevaplug' layout");
2355                 return ERROR_JTAG_INIT_FAILED;
2356         }
2357
2358         return ERROR_OK;
2359 }
2360
2361 void olimex_jtag_blink(void)
2362 {
2363         /* Olimex ARM-USB-OCD has a LED connected to ACBUS3
2364          * ACBUS3 is bit 3 of the GPIOH port
2365          */
2366         if (high_output & 0x08)
2367         {
2368                 /* set port pin high */
2369                 high_output &= 0x07;
2370         }
2371         else
2372         {
2373                 /* set port pin low */
2374                 high_output |= 0x08;
2375         }
2376
2377         BUFFER_ADD = 0x82;
2378         BUFFER_ADD = high_output;
2379         BUFFER_ADD = high_direction;
2380 }
2381
2382
2383 void flyswatter_jtag_blink(void)
2384 {
2385         /*
2386          * Flyswatter has two LEDs connected to ACBUS2 and ACBUS3
2387          */
2388         high_output ^= 0x0c;
2389
2390         BUFFER_ADD = 0x82;
2391         BUFFER_ADD = high_output;
2392         BUFFER_ADD = high_direction;
2393 }
2394
2395
2396 void turtle_jtag_blink(void)
2397 {
2398         /*
2399          * Turtelizer2 has two LEDs connected to ACBUS2 and ACBUS3
2400          */
2401         if (high_output & 0x08)
2402         {
2403                 high_output = 0x04;
2404         }
2405         else
2406         {
2407                 high_output = 0x08;
2408         }
2409
2410         BUFFER_ADD = 0x82;
2411         BUFFER_ADD = high_output;
2412         BUFFER_ADD = high_direction;
2413 }
2414
2415
2416 int ft2232_quit(void)
2417 {
2418 #if BUILD_FT2232_FTD2XX == 1
2419         FT_STATUS status;
2420
2421         status = FT_Close(ftdih);
2422 #elif BUILD_FT2232_LIBFTDI == 1
2423         ftdi_disable_bitbang(&ftdic);
2424
2425         ftdi_usb_close(&ftdic);
2426
2427         ftdi_deinit(&ftdic);
2428 #endif
2429
2430         free(ft2232_buffer);
2431         ft2232_buffer = NULL;
2432
2433         return ERROR_OK;
2434 }
2435
2436
2437 int ft2232_handle_device_desc_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
2438 {
2439         char *cp;
2440         char buf[200];
2441         if (argc == 1)
2442         {
2443                 ft2232_device_desc = strdup(args[0]);
2444                 cp = strchr( ft2232_device_desc, 0 );
2445                 // under Win32, the FTD2XX driver appends an "A" to the end
2446                 // of the description, this examines the given desc
2447                 // and creates the 'missing' _A or non_A variable.
2448                 if( (cp[-1] == 'A') && (cp[-2]==' ') ){
2449                         // it was, so make this the "A" version.
2450                         ft2232_device_desc_A = ft2232_device_desc;
2451                         // and *CREATE* the non-A version.
2452                         strcpy( buf, ft2232_device_desc );
2453                         cp = strchr( buf, 0 );
2454                         cp[-2] = 0;
2455                         ft2232_device_desc =  strdup( buf );
2456                 } else {
2457                         // <space>A not defined
2458                         // so create it
2459                         sprintf( buf, "%s A", ft2232_device_desc );
2460                         ft2232_device_desc_A = strdup( buf );
2461                 }
2462         }
2463         else
2464         {
2465                 LOG_ERROR("expected exactly one argument to ft2232_device_desc <description>");
2466         }
2467
2468         return ERROR_OK;
2469 }
2470
2471
2472 int ft2232_handle_serial_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
2473 {
2474         if (argc == 1)
2475         {
2476                 ft2232_serial = strdup(args[0]);
2477         }
2478         else
2479         {
2480                 LOG_ERROR("expected exactly one argument to ft2232_serial <serial-number>");
2481         }
2482
2483         return ERROR_OK;
2484 }
2485
2486
2487 int ft2232_handle_layout_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
2488 {
2489         if (argc == 0)
2490                 return ERROR_OK;
2491
2492         ft2232_layout = malloc(strlen(args[0]) + 1);
2493         strcpy(ft2232_layout, args[0]);
2494
2495         return ERROR_OK;
2496 }
2497
2498
2499 int ft2232_handle_vid_pid_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
2500 {
2501         int i;
2502
2503         if (argc > MAX_USB_IDS * 2)
2504         {
2505                 LOG_WARNING("ignoring extra IDs in ft2232_vid_pid "
2506                                         "(maximum is %d pairs)", MAX_USB_IDS);
2507                 argc = MAX_USB_IDS * 2;
2508         }
2509         if ( argc < 2 || (argc & 1) )
2510         {
2511                 LOG_WARNING("incomplete ft2232_vid_pid configuration directive");
2512                 if (argc < 2)
2513                         return ERROR_OK;
2514         }
2515
2516         for (i = 0; i + 1 < argc; i += 2)
2517         {
2518                 ft2232_vid[i >> 1] = strtol(args[i], NULL, 0);
2519                 ft2232_pid[i >> 1] = strtol(args[i + 1], NULL, 0);
2520         }
2521
2522         /*
2523          * Explicitly terminate, in case there are multiples instances of
2524          * ft2232_vid_pid.
2525          */
2526         ft2232_vid[i >> 1] = ft2232_pid[i >> 1] = 0;
2527
2528         return ERROR_OK;
2529 }
2530
2531
2532 int ft2232_handle_latency_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
2533 {
2534         if (argc == 1)
2535         {
2536                 ft2232_latency = atoi(args[0]);
2537         }
2538         else
2539         {
2540                 LOG_ERROR("expected exactly one argument to ft2232_latency <ms>");
2541         }
2542
2543         return ERROR_OK;
2544 }
2545
2546
2547 static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd)
2548 {
2549         int retval = 0;
2550
2551         /* 7 bits of either ones or zeros. */
2552         u8  tms = (tap_get_state() == TAP_RESET ? 0x7F : 0x00);
2553
2554         while (num_cycles > 0)
2555         {
2556                 /* the command 0x4b, "Clock Data to TMS/CS Pin (no Read)" handles
2557                  * at most 7 bits per invocation.  Here we invoke it potentially
2558                  * several times.
2559                  */
2560                 int bitcount_per_command = (num_cycles > 7) ? 7 : num_cycles;
2561
2562                 if (ft2232_buffer_size + 3 >= FT2232_BUFFER_SIZE)
2563                 {
2564                         if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
2565                                 retval = ERROR_JTAG_QUEUE_FAILED;
2566
2567                         first_unsent = cmd;
2568                 }
2569
2570                 /* command "Clock Data to TMS/CS Pin (no Read)" */
2571                 BUFFER_ADD = 0x4b;
2572
2573                 /* scan 7 bit */
2574                 BUFFER_ADD = bitcount_per_command - 1;
2575
2576                 /* TMS data bits are either all zeros or ones to stay in the current stable state */
2577                 BUFFER_ADD = tms;
2578
2579                 require_send = 1;
2580
2581                 num_cycles -= bitcount_per_command;
2582         }
2583
2584         return retval;
2585 }