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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "interface.h"
  25 #include "commands.h"
  26
  27
  28 #if PARPORT_USE_PPDEV == 1
  29 #include <linux/parport.h>
  30 #include <linux/ppdev.h>
  31 #include <sys/ioctl.h>
  32 #else /* not PARPORT_USE_PPDEV */
  33 #ifndef _WIN32
  34 #include <sys/io.h>
  35 #endif
  36 #endif
  37
  38 #if PARPORT_USE_GIVEIO == 1
  39 #if IS_CYGWIN == 1
  40 #include <windows.h>
  41 #endif
  42 #endif
  43
  44 /* configuration */
  45 static uint16_t amt_jtagaccel_port;
  46
  47 /* interface variables
  48  */
  49 static uint8_t aw_control_rst = 0x00;
  50 static uint8_t aw_control_fsm = 0x10;
  51 static uint8_t aw_control_baudrate = 0x20;
  52
  53 static int rtck_enabled = 0;
  54
  55 #if PARPORT_USE_PPDEV == 1
  56 static int device_handle;
  57
  58 static int addr_mode = IEEE1284_MODE_EPP | IEEE1284_ADDR ;
  59 #define AMT_AW(val)     do { ioctl(device_handle, PPSETMODE, &addr_mode); write(device_handle, &val, 1); } while (0)
  60 #define AMT_AR(val)     do { ioctl(device_handle, PPSETMODE, &addr_mode); read(device_handle, &val, 1); } while (0)
  61
  62 static int data_mode = IEEE1284_MODE_EPP | IEEE1284_DATA ;
  63 #define AMT_DW(val)     do { ioctl(device_handle, PPSETMODE, &data_mode); write(device_handle, &val, 1); } while (0)
  64 #define AMT_DR(val)     do { ioctl(device_handle, PPSETMODE, &data_mode); read(device_handle, &val, 1); } while (0)
  65
  66 #else
  67
  68 #define AMT_AW(val)     do { outb(val, amt_jtagaccel_port + 3); } while (0)
  69 #define AMT_AR(val)     do { val = inb(amt_jtagaccel_port + 3); } while (0)
  70 #define AMT_DW(val)     do { outb(val, amt_jtagaccel_port + 4); } while (0)
  71 #define AMT_DR(val)     do { val = inb(amt_jtagaccel_port + 4); } while (0)
  72
  73 #endif // PARPORT_USE_PPDEV
  74
  75 /* tap_move[i][j]: tap movement command to go from state i to state j
  76  * 0: Test-Logic-Reset
  77  * 1: Run-Test/Idle
  78  * 2: Shift-DR
  79  * 3: Pause-DR
  80  * 4: Shift-IR
  81  * 5: Pause-IR
  82  */
  83 static uint8_t amt_jtagaccel_tap_move[6][6][2] =
  84 {
  85         /*         RESET         IDLE        DRSHIFT       DRPAUSE       IRSHIFT       IRPAUSE             */
  86         {{0x1f, 0x00}, {0x0f, 0x00}, {0x05, 0x00}, {0x0a, 0x00}, {0x06, 0x00}, {0x96, 0x00}},   /* RESET */
  87         {{0x1f, 0x00}, {0x00, 0x00}, {0x04, 0x00}, {0x05, 0x00}, {0x06, 0x00}, {0x0b, 0x00}},   /* IDLE */
  88         {{0x1f, 0x00}, {0x0d, 0x00}, {0x00, 0x00}, {0x01, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRSHIFT  */
  89         {{0x1f, 0x00}, {0x0c, 0x00}, {0x08, 0x00}, {0x00, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRPAUSE  */
  90         {{0x1f, 0x00}, {0x0d, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x00, 0x00}, {0x01, 0x00}},   /* IRSHIFT  */
  91         {{0x1f, 0x00}, {0x0c, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x08, 0x00}, {0x00, 0x00}},   /* IRPAUSE  */
  92 };
  93
  94
  95 static void amt_jtagaccel_reset(int trst, int srst)
  96 {
  97         if (trst == 1)
  98                 aw_control_rst |= 0x4;
  99         else if (trst == 0)
 100                 aw_control_rst &= ~0x4;
 101
 102         if (srst == 1)
 103                 aw_control_rst |= 0x1;
 104         else if (srst == 0)
 105                 aw_control_rst &= ~0x1;
 106
 107         AMT_AW(aw_control_rst);
 108 }
 109
 110 static int amt_jtagaccel_speed(int speed)
 111 {
 112         aw_control_baudrate &= 0xf0;
 113         aw_control_baudrate |= speed & 0x0f;
 114         AMT_AW(aw_control_baudrate);
 115
 116         return ERROR_OK;
 117 }
 118
 119 static void amt_jtagaccel_end_state(tap_state_t state)
 120 {
 121         if (tap_is_state_stable(state))
 122                 tap_set_end_state(state);
 123         else
 124         {
 125                 LOG_ERROR("BUG: %i is not a valid end state", state);
 126                 exit(-1);
 127         }
 128 }
 129
 130 static void amt_wait_scan_busy(void)
 131 {
 132         int timeout = 4096;
 133         uint8_t ar_status;
 134
 135         AMT_AR(ar_status);
 136         while (((ar_status) & 0x80) && (timeout-- > 0))
 137                 AMT_AR(ar_status);
 138
 139         if (ar_status & 0x80)
 140         {
 141                 LOG_ERROR("amt_jtagaccel timed out while waiting for end of scan, rtck was %s, last AR_STATUS: 0x%2.2x", (rtck_enabled) ? "enabled" : "disabled", ar_status);
 142                 exit(-1);
 143         }
 144 }
 145
 146 static void amt_jtagaccel_state_move(void)
 147 {
 148         uint8_t aw_scan_tms_5;
 149         uint8_t tms_scan[2];
 150
 151         tap_state_t     cur_state = tap_get_state();
 152         tap_state_t     end_state = tap_get_end_state();
 153
 154         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][0];
 155         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][1];
 156
 157         aw_scan_tms_5 = 0x40 | (tms_scan[0] & 0x1f);
 158         AMT_AW(aw_scan_tms_5);
 159         int jtag_speed = jtag_get_speed();
 160         if (jtag_speed > 3 || rtck_enabled)
 161                 amt_wait_scan_busy();
 162
 163         if (tms_scan[0] & 0x80)
 164         {
 165                 aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
 166                 AMT_AW(aw_scan_tms_5);
 167                 if (jtag_speed > 3 || rtck_enabled)
 168                         amt_wait_scan_busy();
 169         }
 170
 171         tap_set_state(end_state);
 172 }
 173
 174 static void amt_jtagaccel_runtest(int num_cycles)
 175 {
 176         int i = 0;
 177         uint8_t aw_scan_tms_5;
 178         uint8_t aw_scan_tms_1to4;
 179
 180         tap_state_t saved_end_state = tap_get_end_state();
 181
 182         /* only do a state_move when we're not already in IDLE */
 183         if (tap_get_state() != TAP_IDLE)
 184         {
 185                 amt_jtagaccel_end_state(TAP_IDLE);
 186                 amt_jtagaccel_state_move();
 187         }
 188
 189         while (num_cycles - i >= 5)
 190         {
 191                 aw_scan_tms_5 = 0x40;
 192                 AMT_AW(aw_scan_tms_5);
 193                 i += 5;
 194         }
 195
 196         if (num_cycles - i > 0)
 197         {
 198                 aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
 199                 AMT_AW(aw_scan_tms_1to4);
 200         }
 201
 202         amt_jtagaccel_end_state(saved_end_state);
 203         if (tap_get_state() != tap_get_end_state())
 204                 amt_jtagaccel_state_move();
 205 }
 206
 207 static void amt_jtagaccel_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 208 {
 209         int bits_left = scan_size;
 210         int bit_count = 0;
 211         tap_state_t saved_end_state = tap_get_end_state();
 212         uint8_t aw_tdi_option;
 213         uint8_t dw_tdi_scan;
 214         uint8_t dr_tdo;
 215         uint8_t aw_tms_scan;
 216         uint8_t tms_scan[2];
 217         int jtag_speed = jtag_get_speed();
 218
 219         if (ir_scan)
 220                 amt_jtagaccel_end_state(TAP_IRSHIFT);
 221         else
 222                 amt_jtagaccel_end_state(TAP_DRSHIFT);
 223
 224         amt_jtagaccel_state_move();
 225         amt_jtagaccel_end_state(saved_end_state);
 226
 227         /* handle unaligned bits at the beginning */
 228         if ((scan_size - 1) % 8)
 229         {
 230                 aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
 231                 AMT_AW(aw_tdi_option);
 232
 233                 dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
 234                 AMT_DW(dw_tdi_scan);
 235                 if (jtag_speed > 3 || rtck_enabled)
 236                         amt_wait_scan_busy();
 237
 238                 if ((type == SCAN_IN) || (type == SCAN_IO))
 239                 {
 240                         AMT_DR(dr_tdo);
 241                         dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
 242                         buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
 243                 }
 244
 245                 bit_count += (scan_size - 1) % 8;
 246                 bits_left -= (scan_size - 1) % 8;
 247         }
 248
 249         while (bits_left - 1 >= 8)
 250         {
 251                 dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
 252                 AMT_DW(dw_tdi_scan);
 253                 if (jtag_speed > 3 || rtck_enabled)
 254                         amt_wait_scan_busy();
 255
 256                 if ((type == SCAN_IN) || (type == SCAN_IO))
 257                 {
 258                         AMT_DR(dr_tdo);
 259                         buf_set_u32(buffer, bit_count, 8, dr_tdo);
 260                 }
 261
 262                 bit_count += 8;
 263                 bits_left -= 8;
 264         }
 265
 266         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
 267         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
 268         aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
 269         AMT_AW(aw_tms_scan);
 270         if (jtag_speed > 3 || rtck_enabled)
 271                 amt_wait_scan_busy();
 272
 273         if ((type == SCAN_IN) || (type == SCAN_IO))
 274         {
 275                 AMT_DR(dr_tdo);
 276                 dr_tdo = dr_tdo >> 7;
 277                 buf_set_u32(buffer, bit_count, 1, dr_tdo);
 278         }
 279
 280         if (tms_scan[0] & 0x80)
 281         {
 282                 aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
 283                 AMT_AW(aw_tms_scan);
 284                 if (jtag_speed > 3 || rtck_enabled)
 285                         amt_wait_scan_busy();
 286         }
 287         tap_set_state(tap_get_end_state());
 288 }
 289
 290 static int amt_jtagaccel_execute_queue(void)
 291 {
 292         struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
 293         int scan_size;
 294         enum scan_type type;
 295         uint8_t *buffer;
 296         int retval;
 297
 298         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 299          * that wasn't handled by a caller-provided error handler
 300          */
 301         retval = ERROR_OK;
 302
 303         while (cmd)
 304         {
 305                 switch (cmd->type)
 306                 {
 307                         case JTAG_RESET:
 308 #ifdef _DEBUG_JTAG_IO_
 309                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 310 #endif
 311                                 if (cmd->cmd.reset->trst == 1)
 312                                 {
 313                                         tap_set_state(TAP_RESET);
 314                                 }
 315                                 amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 316                                 break;
 317                         case JTAG_RUNTEST:
 318 #ifdef _DEBUG_JTAG_IO_
 319                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 320 #endif
 321                                 amt_jtagaccel_end_state(cmd->cmd.runtest->end_state);
 322                                 amt_jtagaccel_runtest(cmd->cmd.runtest->num_cycles);
 323                                 break;
 324                         case JTAG_STATEMOVE:
 325 #ifdef _DEBUG_JTAG_IO_
 326                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 327 #endif
 328                                 amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
 329                                 amt_jtagaccel_state_move();
 330                                 break;
 331                         case JTAG_SCAN:
 332 #ifdef _DEBUG_JTAG_IO_
 333                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 334 #endif
 335                                 amt_jtagaccel_end_state(cmd->cmd.scan->end_state);
 336                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 337                                 type = jtag_scan_type(cmd->cmd.scan);
 338                                 amt_jtagaccel_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 339                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 340                                         retval = ERROR_JTAG_QUEUE_FAILED;
 341                                 if (buffer)
 342                                         free(buffer);
 343                                 break;
 344                         case JTAG_SLEEP:
 345 #ifdef _DEBUG_JTAG_IO_
 346                                 LOG_DEBUG("sleep %" PRIi32, cmd->cmd.sleep->us);
 347 #endif
 348                                 jtag_sleep(cmd->cmd.sleep->us);
 349                                 break;
 350                         default:
 351                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 352                                 exit(-1);
 353                 }
 354                 cmd = cmd->next;
 355         }
 356
 357         return retval;
 358 }
 359
 360 #if PARPORT_USE_GIVEIO == 1
 361 int amt_jtagaccel_get_giveio_access(void)
 362 {
 363         HANDLE h;
 364         OSVERSIONINFO version;
 365
 366         version.dwOSVersionInfoSize = sizeof version;
 367         if (!GetVersionEx(&version)) {
 368         errno = EINVAL;
 369         return -1;
 370         }
 371         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 372         return 0;
 373
 374         h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 375         if (h == INVALID_HANDLE_VALUE) {
 376         errno = ENODEV;
 377         return -1;
 378         }
 379
 380         CloseHandle(h);
 381
 382         return 0;
 383 }
 384 #endif
 385
 386 static int amt_jtagaccel_init(void)
 387 {
 388 #if PARPORT_USE_PPDEV == 1
 389         char buffer[256];
 390         int i = 0;
 391         uint8_t control_port;
 392 #else
 393         uint8_t status_port;
 394 #endif
 395         uint8_t ar_status;
 396
 397 #if PARPORT_USE_PPDEV == 1
 398         if (device_handle > 0)
 399         {
 400                 LOG_ERROR("device is already opened");
 401                 return ERROR_JTAG_INIT_FAILED;
 402         }
 403
 404         snprintf(buffer, 256, "/dev/parport%d", amt_jtagaccel_port);
 405         device_handle = open(buffer, O_RDWR);
 406
 407         if (device_handle < 0)
 408         {
 409                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 410                 return ERROR_JTAG_INIT_FAILED;
 411         }
 412
 413         i = ioctl(device_handle, PPCLAIM);
 414         if (i < 0)
 415         {
 416                 LOG_ERROR("cannot claim device");
 417                 return ERROR_JTAG_INIT_FAILED;
 418         }
 419
 420         i = IEEE1284_MODE_EPP;
 421         i = ioctl(device_handle, PPSETMODE, & i);
 422         if (i < 0)
 423         {
 424                 LOG_ERROR(" cannot set compatible mode to device");
 425                 return ERROR_JTAG_INIT_FAILED;
 426         }
 427
 428         control_port = 0x00;
 429         i = ioctl(device_handle, PPWCONTROL, &control_port);
 430
 431         control_port = 0x04;
 432         i = ioctl(device_handle, PPWCONTROL, &control_port);
 433
 434 #else
 435         if (amt_jtagaccel_port == 0)
 436         {
 437                 amt_jtagaccel_port = 0x378;
 438                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 439         }
 440
 441 #if PARPORT_USE_GIVEIO == 1
 442         if (amt_jtagaccel_get_giveio_access() != 0) {
 443 #else /* PARPORT_USE_GIVEIO */
 444         if (ioperm(amt_jtagaccel_port, 5, 1) != 0) {
 445 #endif /* PARPORT_USE_GIVEIO */
 446                 LOG_ERROR("missing privileges for direct i/o");
 447                 return ERROR_JTAG_INIT_FAILED;
 448         }
 449
 450         /* prepare epp port */
 451         /* clear timeout */
 452         status_port = inb(amt_jtagaccel_port + 1);
 453         outb(status_port | 0x1, amt_jtagaccel_port + 1);
 454
 455         /* reset epp port */
 456         outb(0x00, amt_jtagaccel_port + 2);
 457         outb(0x04, amt_jtagaccel_port + 2);
 458 #endif
 459
 460         if (rtck_enabled)
 461         {
 462                 /* set RTCK enable bit */
 463                 aw_control_fsm |= 0x02;
 464         }
 465
 466         /* enable JTAG port */
 467         aw_control_fsm |= 0x04;
 468         AMT_AW(aw_control_fsm);
 469
 470         amt_jtagaccel_speed(jtag_get_speed());
 471
 472         enum reset_types jtag_reset_config = jtag_get_reset_config();
 473         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 474                 aw_control_rst &= ~0x8;
 475         else
 476                 aw_control_rst |= 0x8;
 477
 478         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 479                 aw_control_rst &= ~0x2;
 480         else
 481                 aw_control_rst |= 0x2;
 482
 483         amt_jtagaccel_reset(0, 0);
 484
 485         /* read status register */
 486         AMT_AR(ar_status);
 487         LOG_DEBUG("AR_STATUS: 0x%2.2x", ar_status);
 488
 489         return ERROR_OK;
 490 }
 491
 492 static int amt_jtagaccel_quit(void)
 493 {
 494
 495         return ERROR_OK;
 496 }
 497
 498 COMMAND_HANDLER(amt_jtagaccel_handle_parport_port_command)
 499 {
 500         if (argc == 1)
 501         {
 502                 /* only if the port wasn't overwritten by cmdline */
 503                 if (amt_jtagaccel_port == 0)
 504                 {
 505                         uint16_t port;
 506                         COMMAND_PARSE_NUMBER(u16, args[0], port);
 507                         amt_jtagaccel_port = port;
 508                 }
 509                 else
 510                 {
 511                         LOG_ERROR("The parport port was already configured!");
 512                         return ERROR_FAIL;
 513                 }
 514         }
 515
 516         command_print(cmd_ctx, "parport port = %u", amt_jtagaccel_port);
 517
 518         return ERROR_OK;
 519 }
 520
 521 COMMAND_HANDLER(amt_jtagaccel_handle_rtck_command)
 522 {
 523         if (argc == 0)
 524         {
 525                 command_print(cmd_ctx, "amt_jtagaccel RTCK feature %s", (rtck_enabled) ? "enabled" : "disabled");
 526                 return ERROR_OK;
 527         }
 528         else
 529         {
 530                 if (strcmp(args[0], "enabled") == 0)
 531                 {
 532                         rtck_enabled = 1;
 533                 }
 534                 else
 535                 {
 536                         rtck_enabled = 0;
 537                 }
 538         }
 539
 540         return ERROR_OK;
 541 }
 542
 543 static int amt_jtagaccel_register_commands(struct command_context *cmd_ctx)
 544 {
 545         register_command(cmd_ctx, NULL, "parport_port",
 546                         amt_jtagaccel_handle_parport_port_command, COMMAND_CONFIG,
 547                         NULL);
 548         register_command(cmd_ctx, NULL, "rtck",
 549                         amt_jtagaccel_handle_rtck_command, COMMAND_CONFIG,
 550                         NULL);
 551
 552         return ERROR_OK;
 553 }
 554
 555 struct jtag_interface amt_jtagaccel_interface = {
 556                 .name = "amt_jtagaccel",
 557                 .register_commands = &amt_jtagaccel_register_commands,
 558                 .init = &amt_jtagaccel_init,
 559                 .quit = &amt_jtagaccel_quit,
 560                 .speed = &amt_jtagaccel_speed,
 561                 .execute_queue = &amt_jtagaccel_execute_queue,
 562         };