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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 <jtag/interface.h>
  25 #include <jtag/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 const int addr_mode = IEEE1284_MODE_EPP | IEEE1284_ADDR;
  59
  60 /* FIXME do something sane when these ioctl/read/write calls fail. */
  61
  62 #define AMT_AW(val) \
  63         do { \
  64                 int __retval; \
  65                 \
  66                 __retval = ioctl(device_handle, PPSETMODE, &addr_mode); \
  67                 __retval = write(device_handle, &val, 1); \
  68         } while (0)
  69 #define AMT_AR(val) \
  70         do { \
  71                 int __retval; \
  72                 \
  73                 __retval = ioctl(device_handle, PPSETMODE, &addr_mode); \
  74                 __retval = read(device_handle, &val, 1); \
  75         } while (0)
  76
  77 static const int data_mode = IEEE1284_MODE_EPP | IEEE1284_DATA;
  78
  79 #define AMT_DW(val) \
  80         do { \
  81                 int __retval; \
  82                 \
  83                 __retval = ioctl(device_handle, PPSETMODE, &data_mode); \
  84                 __retval = write(device_handle, &val, 1); \
  85         } while (0)
  86 #define AMT_DR(val) \
  87         do { \
  88                 int __retval; \
  89                 \
  90                 __retval = ioctl(device_handle, PPSETMODE, &data_mode); \
  91                 __retval = read(device_handle, &val, 1); \
  92         } while (0)
  93
  94 #else
  95
  96 #define AMT_AW(val)     do { outb(val, amt_jtagaccel_port + 3); } while (0)
  97 #define AMT_AR(val)     do { val = inb(amt_jtagaccel_port + 3); } while (0)
  98 #define AMT_DW(val)     do { outb(val, amt_jtagaccel_port + 4); } while (0)
  99 #define AMT_DR(val)     do { val = inb(amt_jtagaccel_port + 4); } while (0)
 100
 101 #endif // PARPORT_USE_PPDEV
 102
 103 /* tap_move[i][j]: tap movement command to go from state i to state j
 104  * 0: Test-Logic-Reset
 105  * 1: Run-Test/Idle
 106  * 2: Shift-DR
 107  * 3: Pause-DR
 108  * 4: Shift-IR
 109  * 5: Pause-IR
 110  */
 111 static uint8_t amt_jtagaccel_tap_move[6][6][2] =
 112 {
 113         /*         RESET         IDLE        DRSHIFT       DRPAUSE       IRSHIFT       IRPAUSE             */
 114         {{0x1f, 0x00}, {0x0f, 0x00}, {0x05, 0x00}, {0x0a, 0x00}, {0x06, 0x00}, {0x96, 0x00}},   /* RESET */
 115         {{0x1f, 0x00}, {0x00, 0x00}, {0x04, 0x00}, {0x05, 0x00}, {0x06, 0x00}, {0x0b, 0x00}},   /* IDLE */
 116         {{0x1f, 0x00}, {0x0d, 0x00}, {0x00, 0x00}, {0x01, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRSHIFT  */
 117         {{0x1f, 0x00}, {0x0c, 0x00}, {0x08, 0x00}, {0x00, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRPAUSE  */
 118         {{0x1f, 0x00}, {0x0d, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x00, 0x00}, {0x01, 0x00}},   /* IRSHIFT  */
 119         {{0x1f, 0x00}, {0x0c, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x08, 0x00}, {0x00, 0x00}},   /* IRPAUSE  */
 120 };
 121
 122
 123 static void amt_jtagaccel_reset(int trst, int srst)
 124 {
 125         if (trst == 1)
 126                 aw_control_rst |= 0x4;
 127         else if (trst == 0)
 128                 aw_control_rst &= ~0x4;
 129
 130         if (srst == 1)
 131                 aw_control_rst |= 0x1;
 132         else if (srst == 0)
 133                 aw_control_rst &= ~0x1;
 134
 135         AMT_AW(aw_control_rst);
 136 }
 137
 138 static int amt_jtagaccel_speed(int speed)
 139 {
 140         aw_control_baudrate &= 0xf0;
 141         aw_control_baudrate |= speed & 0x0f;
 142         AMT_AW(aw_control_baudrate);
 143
 144         return ERROR_OK;
 145 }
 146
 147 static void amt_jtagaccel_end_state(tap_state_t state)
 148 {
 149         if (tap_is_state_stable(state))
 150                 tap_set_end_state(state);
 151         else
 152         {
 153                 LOG_ERROR("BUG: %i is not a valid end state", state);
 154                 exit(-1);
 155         }
 156 }
 157
 158 static void amt_wait_scan_busy(void)
 159 {
 160         int timeout = 4096;
 161         uint8_t ar_status;
 162
 163         AMT_AR(ar_status);
 164         while (((ar_status) & 0x80) && (timeout-- > 0))
 165                 AMT_AR(ar_status);
 166
 167         if (ar_status & 0x80)
 168         {
 169                 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);
 170                 exit(-1);
 171         }
 172 }
 173
 174 static void amt_jtagaccel_state_move(void)
 175 {
 176         uint8_t aw_scan_tms_5;
 177         uint8_t tms_scan[2];
 178
 179         tap_state_t     cur_state = tap_get_state();
 180         tap_state_t     end_state = tap_get_end_state();
 181
 182         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][0];
 183         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][1];
 184
 185         aw_scan_tms_5 = 0x40 | (tms_scan[0] & 0x1f);
 186         AMT_AW(aw_scan_tms_5);
 187         int jtag_speed = jtag_get_speed();
 188         if (jtag_speed > 3 || rtck_enabled)
 189                 amt_wait_scan_busy();
 190
 191         if (tms_scan[0] & 0x80)
 192         {
 193                 aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
 194                 AMT_AW(aw_scan_tms_5);
 195                 if (jtag_speed > 3 || rtck_enabled)
 196                         amt_wait_scan_busy();
 197         }
 198
 199         tap_set_state(end_state);
 200 }
 201
 202 static void amt_jtagaccel_runtest(int num_cycles)
 203 {
 204         int i = 0;
 205         uint8_t aw_scan_tms_5;
 206         uint8_t aw_scan_tms_1to4;
 207
 208         tap_state_t saved_end_state = tap_get_end_state();
 209
 210         /* only do a state_move when we're not already in IDLE */
 211         if (tap_get_state() != TAP_IDLE)
 212         {
 213                 amt_jtagaccel_end_state(TAP_IDLE);
 214                 amt_jtagaccel_state_move();
 215         }
 216
 217         while (num_cycles - i >= 5)
 218         {
 219                 aw_scan_tms_5 = 0x40;
 220                 AMT_AW(aw_scan_tms_5);
 221                 i += 5;
 222         }
 223
 224         if (num_cycles - i > 0)
 225         {
 226                 aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
 227                 AMT_AW(aw_scan_tms_1to4);
 228         }
 229
 230         amt_jtagaccel_end_state(saved_end_state);
 231         if (tap_get_state() != tap_get_end_state())
 232                 amt_jtagaccel_state_move();
 233 }
 234
 235 static void amt_jtagaccel_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 236 {
 237         int bits_left = scan_size;
 238         int bit_count = 0;
 239         tap_state_t saved_end_state = tap_get_end_state();
 240         uint8_t aw_tdi_option;
 241         uint8_t dw_tdi_scan;
 242         uint8_t dr_tdo;
 243         uint8_t aw_tms_scan;
 244         uint8_t tms_scan[2];
 245         int jtag_speed = jtag_get_speed();
 246
 247         if (ir_scan)
 248                 amt_jtagaccel_end_state(TAP_IRSHIFT);
 249         else
 250                 amt_jtagaccel_end_state(TAP_DRSHIFT);
 251
 252         amt_jtagaccel_state_move();
 253         amt_jtagaccel_end_state(saved_end_state);
 254
 255         /* handle unaligned bits at the beginning */
 256         if ((scan_size - 1) % 8)
 257         {
 258                 aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
 259                 AMT_AW(aw_tdi_option);
 260
 261                 dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
 262                 AMT_DW(dw_tdi_scan);
 263                 if (jtag_speed > 3 || rtck_enabled)
 264                         amt_wait_scan_busy();
 265
 266                 if ((type == SCAN_IN) || (type == SCAN_IO))
 267                 {
 268                         AMT_DR(dr_tdo);
 269                         dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
 270                         buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
 271                 }
 272
 273                 bit_count += (scan_size - 1) % 8;
 274                 bits_left -= (scan_size - 1) % 8;
 275         }
 276
 277         while (bits_left - 1 >= 8)
 278         {
 279                 dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
 280                 AMT_DW(dw_tdi_scan);
 281                 if (jtag_speed > 3 || rtck_enabled)
 282                         amt_wait_scan_busy();
 283
 284                 if ((type == SCAN_IN) || (type == SCAN_IO))
 285                 {
 286                         AMT_DR(dr_tdo);
 287                         buf_set_u32(buffer, bit_count, 8, dr_tdo);
 288                 }
 289
 290                 bit_count += 8;
 291                 bits_left -= 8;
 292         }
 293
 294         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
 295         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
 296         aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
 297         AMT_AW(aw_tms_scan);
 298         if (jtag_speed > 3 || rtck_enabled)
 299                 amt_wait_scan_busy();
 300
 301         if ((type == SCAN_IN) || (type == SCAN_IO))
 302         {
 303                 AMT_DR(dr_tdo);
 304                 dr_tdo = dr_tdo >> 7;
 305                 buf_set_u32(buffer, bit_count, 1, dr_tdo);
 306         }
 307
 308         if (tms_scan[0] & 0x80)
 309         {
 310                 aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
 311                 AMT_AW(aw_tms_scan);
 312                 if (jtag_speed > 3 || rtck_enabled)
 313                         amt_wait_scan_busy();
 314         }
 315         tap_set_state(tap_get_end_state());
 316 }
 317
 318 static int amt_jtagaccel_execute_queue(void)
 319 {
 320         struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
 321         int scan_size;
 322         enum scan_type type;
 323         uint8_t *buffer;
 324         int retval;
 325
 326         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 327          * that wasn't handled by a caller-provided error handler
 328          */
 329         retval = ERROR_OK;
 330
 331         while (cmd)
 332         {
 333                 switch (cmd->type)
 334                 {
 335                         case JTAG_RESET:
 336 #ifdef _DEBUG_JTAG_IO_
 337                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 338 #endif
 339                                 if (cmd->cmd.reset->trst == 1)
 340                                 {
 341                                         tap_set_state(TAP_RESET);
 342                                 }
 343                                 amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 344                                 break;
 345                         case JTAG_RUNTEST:
 346 #ifdef _DEBUG_JTAG_IO_
 347                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 348 #endif
 349                                 amt_jtagaccel_end_state(cmd->cmd.runtest->end_state);
 350                                 amt_jtagaccel_runtest(cmd->cmd.runtest->num_cycles);
 351                                 break;
 352                         case JTAG_STATEMOVE:
 353 #ifdef _DEBUG_JTAG_IO_
 354                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 355 #endif
 356                                 amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
 357                                 amt_jtagaccel_state_move();
 358                                 break;
 359                         case JTAG_SCAN:
 360 #ifdef _DEBUG_JTAG_IO_
 361                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 362 #endif
 363                                 amt_jtagaccel_end_state(cmd->cmd.scan->end_state);
 364                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 365                                 type = jtag_scan_type(cmd->cmd.scan);
 366                                 amt_jtagaccel_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 367                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 368                                         retval = ERROR_JTAG_QUEUE_FAILED;
 369                                 if (buffer)
 370                                         free(buffer);
 371                                 break;
 372                         case JTAG_SLEEP:
 373 #ifdef _DEBUG_JTAG_IO_
 374                                 LOG_DEBUG("sleep %" PRIi32, cmd->cmd.sleep->us);
 375 #endif
 376                                 jtag_sleep(cmd->cmd.sleep->us);
 377                                 break;
 378                         default:
 379                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 380                                 exit(-1);
 381                 }
 382                 cmd = cmd->next;
 383         }
 384
 385         return retval;
 386 }
 387
 388 #if PARPORT_USE_GIVEIO == 1
 389 int amt_jtagaccel_get_giveio_access(void)
 390 {
 391         HANDLE h;
 392         OSVERSIONINFO version;
 393
 394         version.dwOSVersionInfoSize = sizeof version;
 395         if (!GetVersionEx(&version)) {
 396         errno = EINVAL;
 397         return -1;
 398         }
 399         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 400         return 0;
 401
 402         h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 403         if (h == INVALID_HANDLE_VALUE) {
 404         errno = ENODEV;
 405         return -1;
 406         }
 407
 408         CloseHandle(h);
 409
 410         return 0;
 411 }
 412 #endif
 413
 414 static int amt_jtagaccel_init(void)
 415 {
 416 #if PARPORT_USE_PPDEV == 1
 417         char buffer[256];
 418         int i = 0;
 419         uint8_t control_port;
 420 #else
 421         uint8_t status_port;
 422 #endif
 423         uint8_t ar_status;
 424
 425 #if PARPORT_USE_PPDEV == 1
 426         if (device_handle > 0)
 427         {
 428                 LOG_ERROR("device is already opened");
 429                 return ERROR_JTAG_INIT_FAILED;
 430         }
 431
 432         snprintf(buffer, 256, "/dev/parport%d", amt_jtagaccel_port);
 433         device_handle = open(buffer, O_RDWR);
 434
 435         if (device_handle < 0)
 436         {
 437                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 438                 return ERROR_JTAG_INIT_FAILED;
 439         }
 440
 441         i = ioctl(device_handle, PPCLAIM);
 442         if (i < 0)
 443         {
 444                 LOG_ERROR("cannot claim device");
 445                 return ERROR_JTAG_INIT_FAILED;
 446         }
 447
 448         i = IEEE1284_MODE_EPP;
 449         i = ioctl(device_handle, PPSETMODE, & i);
 450         if (i < 0)
 451         {
 452                 LOG_ERROR(" cannot set compatible mode to device");
 453                 return ERROR_JTAG_INIT_FAILED;
 454         }
 455
 456         control_port = 0x00;
 457         i = ioctl(device_handle, PPWCONTROL, &control_port);
 458
 459         control_port = 0x04;
 460         i = ioctl(device_handle, PPWCONTROL, &control_port);
 461
 462 #else
 463         if (amt_jtagaccel_port == 0)
 464         {
 465                 amt_jtagaccel_port = 0x378;
 466                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 467         }
 468
 469 #if PARPORT_USE_GIVEIO == 1
 470         if (amt_jtagaccel_get_giveio_access() != 0) {
 471 #else /* PARPORT_USE_GIVEIO */
 472         if (ioperm(amt_jtagaccel_port, 5, 1) != 0) {
 473 #endif /* PARPORT_USE_GIVEIO */
 474                 LOG_ERROR("missing privileges for direct i/o");
 475                 return ERROR_JTAG_INIT_FAILED;
 476         }
 477
 478         /* prepare epp port */
 479         /* clear timeout */
 480         status_port = inb(amt_jtagaccel_port + 1);
 481         outb(status_port | 0x1, amt_jtagaccel_port + 1);
 482
 483         /* reset epp port */
 484         outb(0x00, amt_jtagaccel_port + 2);
 485         outb(0x04, amt_jtagaccel_port + 2);
 486 #endif
 487
 488         if (rtck_enabled)
 489         {
 490                 /* set RTCK enable bit */
 491                 aw_control_fsm |= 0x02;
 492         }
 493
 494         /* enable JTAG port */
 495         aw_control_fsm |= 0x04;
 496         AMT_AW(aw_control_fsm);
 497
 498         amt_jtagaccel_speed(jtag_get_speed());
 499
 500         enum reset_types jtag_reset_config = jtag_get_reset_config();
 501         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 502                 aw_control_rst &= ~0x8;
 503         else
 504                 aw_control_rst |= 0x8;
 505
 506         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 507                 aw_control_rst &= ~0x2;
 508         else
 509                 aw_control_rst |= 0x2;
 510
 511         amt_jtagaccel_reset(0, 0);
 512
 513         /* read status register */
 514         AMT_AR(ar_status);
 515         LOG_DEBUG("AR_STATUS: 0x%2.2x", ar_status);
 516
 517         return ERROR_OK;
 518 }
 519
 520 static int amt_jtagaccel_quit(void)
 521 {
 522
 523         return ERROR_OK;
 524 }
 525
 526 COMMAND_HANDLER(amt_jtagaccel_handle_parport_port_command)
 527 {
 528         if (CMD_ARGC == 1)
 529         {
 530                 /* only if the port wasn't overwritten by cmdline */
 531                 if (amt_jtagaccel_port == 0)
 532                 {
 533                         uint16_t port;
 534                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
 535                         amt_jtagaccel_port = port;
 536                 }
 537                 else
 538                 {
 539                         LOG_ERROR("The parport port was already configured!");
 540                         return ERROR_FAIL;
 541                 }
 542         }
 543
 544         command_print(CMD_CTX, "parport port = %u", amt_jtagaccel_port);
 545
 546         return ERROR_OK;
 547 }
 548
 549 COMMAND_HANDLER(amt_jtagaccel_handle_rtck_command)
 550 {
 551         if (CMD_ARGC == 0)
 552         {
 553                 command_print(CMD_CTX, "amt_jtagaccel RTCK feature %s", (rtck_enabled) ? "enabled" : "disabled");
 554                 return ERROR_OK;
 555         }
 556         else
 557         {
 558                 if (strcmp(CMD_ARGV[0], "enabled") == 0)
 559                 {
 560                         rtck_enabled = 1;
 561                 }
 562                 else
 563                 {
 564                         rtck_enabled = 0;
 565                 }
 566         }
 567
 568         return ERROR_OK;
 569 }
 570
 571 static const struct command_registration amtjtagaccel_command_handlers[] = {
 572         {
 573                 .name = "parport_port",
 574                 .handler = &amt_jtagaccel_handle_parport_port_command,
 575                 .mode = COMMAND_CONFIG,
 576                 .help = "configure the parallel port to use",
 577                 .usage = "<port_num>",
 578         },
 579         {
 580                 .name = "parport_port",
 581                 .handler = &amt_jtagaccel_handle_rtck_command,
 582                 .mode = COMMAND_CONFIG,
 583                 .help = "enable RTCK",
 584                 .usage = "<enable|disable>",
 585         },
 586         COMMAND_REGISTRATION_DONE
 587 };
 588
 589 struct jtag_interface amt_jtagaccel_interface = {
 590         .name = "amt_jtagaccel",
 591         .commands = amtjtagaccel_command_handlers,
 592
 593         .init = amt_jtagaccel_init,
 594         .quit = amt_jtagaccel_quit,
 595         .speed = amt_jtagaccel_speed,
 596         .execute_queue = amt_jtagaccel_execute_queue,
 597 };