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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 u16 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 static int amt_jtagaccel_execute_queue(void);
  76 static int amt_jtagaccel_register_commands(struct command_context_s *cmd_ctx);
  77 static int amt_jtagaccel_speed(int speed);
  78 static int amt_jtagaccel_init(void);
  79 static int amt_jtagaccel_quit(void);
  80
  81 static int amt_jtagaccel_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  82 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  83
  84 /* tap_move[i][j]: tap movement command to go from state i to state j
  85  * 0: Test-Logic-Reset
  86  * 1: Run-Test/Idle
  87  * 2: Shift-DR
  88  * 3: Pause-DR
  89  * 4: Shift-IR
  90  * 5: Pause-IR
  91  */
  92 static uint8_t amt_jtagaccel_tap_move[6][6][2] =
  93 {
  94         /*         RESET         IDLE        DRSHIFT       DRPAUSE       IRSHIFT       IRPAUSE             */
  95         {{0x1f, 0x00}, {0x0f, 0x00}, {0x8a, 0x04}, {0x0a, 0x00}, {0x06, 0x00}, {0x96, 0x00}},   /* RESET */
  96         {{0x1f, 0x00}, {0x00, 0x00}, {0x85, 0x08}, {0x05, 0x00}, {0x8b, 0x08}, {0x0b, 0x00}},   /* IDLE */
  97         {{0x1f, 0x00}, {0x0d, 0x00}, {0x00, 0x00}, {0x01, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRSHIFT  */
  98         {{0x1f, 0x00}, {0x0c, 0x00}, {0x08, 0x00}, {0x00, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRPAUSE  */
  99         {{0x1f, 0x00}, {0x0d, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x00, 0x00}, {0x01, 0x00}},   /* IRSHIFT  */
 100         {{0x1f, 0x00}, {0x0c, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x08, 0x00}, {0x00, 0x00}},   /* IRPAUSE  */
 101 };
 102
 103
 104 jtag_interface_t amt_jtagaccel_interface =
 105 {
 106         .name = "amt_jtagaccel",
 107
 108         .execute_queue = amt_jtagaccel_execute_queue,
 109
 110         .speed = amt_jtagaccel_speed,
 111         .register_commands = amt_jtagaccel_register_commands,
 112         .init = amt_jtagaccel_init,
 113         .quit = amt_jtagaccel_quit,
 114 };
 115
 116 static int amt_jtagaccel_register_commands(struct command_context_s *cmd_ctx)
 117 {
 118         register_command(cmd_ctx, NULL, "parport_port", amt_jtagaccel_handle_parport_port_command,
 119                                          COMMAND_CONFIG, NULL);
 120         register_command(cmd_ctx, NULL, "rtck", amt_jtagaccel_handle_rtck_command,
 121                                          COMMAND_CONFIG, NULL);
 122
 123         return ERROR_OK;
 124 }
 125
 126 static void amt_jtagaccel_reset(int trst, int srst)
 127 {
 128         if (trst == 1)
 129                 aw_control_rst |= 0x4;
 130         else if (trst == 0)
 131                 aw_control_rst &= ~0x4;
 132
 133         if (srst == 1)
 134                 aw_control_rst |= 0x1;
 135         else if (srst == 0)
 136                 aw_control_rst &= ~0x1;
 137
 138         AMT_AW(aw_control_rst);
 139 }
 140
 141 static int amt_jtagaccel_speed(int speed)
 142 {
 143         aw_control_baudrate &= 0xf0;
 144         aw_control_baudrate |= speed & 0x0f;
 145         AMT_AW(aw_control_baudrate);
 146
 147         return ERROR_OK;
 148 }
 149
 150 static void amt_jtagaccel_end_state(tap_state_t state)
 151 {
 152         if (tap_is_state_stable(state))
 153                 tap_set_end_state(state);
 154         else
 155         {
 156                 LOG_ERROR("BUG: %i is not a valid end state", state);
 157                 exit(-1);
 158         }
 159 }
 160
 161 static void amt_wait_scan_busy(void)
 162 {
 163         int timeout = 4096;
 164         uint8_t ar_status;
 165
 166         AMT_AR(ar_status);
 167         while (((ar_status) & 0x80) && (timeout-- > 0))
 168                 AMT_AR(ar_status);
 169
 170         if (ar_status & 0x80)
 171         {
 172                 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);
 173                 exit(-1);
 174         }
 175 }
 176
 177 static void amt_jtagaccel_state_move(void)
 178 {
 179         uint8_t aw_scan_tms_5;
 180         uint8_t tms_scan[2];
 181
 182         tap_state_t     cur_state = tap_get_state();
 183         tap_state_t     end_state = tap_get_end_state();
 184
 185         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][0];
 186         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][1];
 187
 188         aw_scan_tms_5 = 0x40 | (tms_scan[0] & 0x1f);
 189         AMT_AW(aw_scan_tms_5);
 190         int jtag_speed = jtag_get_speed();
 191         if (jtag_speed > 3 || rtck_enabled)
 192                 amt_wait_scan_busy();
 193
 194         if (tms_scan[0] & 0x80)
 195         {
 196                 aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
 197                 AMT_AW(aw_scan_tms_5);
 198                 if (jtag_speed > 3 || rtck_enabled)
 199                         amt_wait_scan_busy();
 200         }
 201
 202         tap_set_state(end_state);
 203 }
 204
 205 static void amt_jtagaccel_runtest(int num_cycles)
 206 {
 207         int i = 0;
 208         uint8_t aw_scan_tms_5;
 209         uint8_t aw_scan_tms_1to4;
 210
 211         tap_state_t saved_end_state = tap_get_end_state();
 212
 213         /* only do a state_move when we're not already in IDLE */
 214         if (tap_get_state() != TAP_IDLE)
 215         {
 216                 amt_jtagaccel_end_state(TAP_IDLE);
 217                 amt_jtagaccel_state_move();
 218         }
 219
 220         while (num_cycles - i >= 5)
 221         {
 222                 aw_scan_tms_5 = 0x40;
 223                 AMT_AW(aw_scan_tms_5);
 224                 i += 5;
 225         }
 226
 227         if (num_cycles - i > 0)
 228         {
 229                 aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
 230                 AMT_AW(aw_scan_tms_1to4);
 231         }
 232
 233         amt_jtagaccel_end_state(saved_end_state);
 234         if (tap_get_state() != tap_get_end_state())
 235                 amt_jtagaccel_state_move();
 236 }
 237
 238 static void amt_jtagaccel_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 239 {
 240         int bits_left = scan_size;
 241         int bit_count = 0;
 242         tap_state_t saved_end_state = tap_get_end_state();
 243         uint8_t aw_tdi_option;
 244         uint8_t dw_tdi_scan;
 245         uint8_t dr_tdo;
 246         uint8_t aw_tms_scan;
 247         uint8_t tms_scan[2];
 248         int jtag_speed = jtag_get_speed();
 249
 250         if (ir_scan)
 251                 amt_jtagaccel_end_state(TAP_IRSHIFT);
 252         else
 253                 amt_jtagaccel_end_state(TAP_DRSHIFT);
 254
 255         amt_jtagaccel_state_move();
 256         amt_jtagaccel_end_state(saved_end_state);
 257
 258         /* handle unaligned bits at the beginning */
 259         if ((scan_size - 1) % 8)
 260         {
 261                 aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
 262                 AMT_AW(aw_tdi_option);
 263
 264                 dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
 265                 AMT_DW(dw_tdi_scan);
 266                 if (jtag_speed > 3 || rtck_enabled)
 267                         amt_wait_scan_busy();
 268
 269                 if ((type == SCAN_IN) || (type == SCAN_IO))
 270                 {
 271                         AMT_DR(dr_tdo);
 272                         dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
 273                         buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
 274                 }
 275
 276                 bit_count += (scan_size - 1) % 8;
 277                 bits_left -= (scan_size - 1) % 8;
 278         }
 279
 280         while (bits_left - 1 >= 8)
 281         {
 282                 dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
 283                 AMT_DW(dw_tdi_scan);
 284                 if (jtag_speed > 3 || rtck_enabled)
 285                         amt_wait_scan_busy();
 286
 287                 if ((type == SCAN_IN) || (type == SCAN_IO))
 288                 {
 289                         AMT_DR(dr_tdo);
 290                         buf_set_u32(buffer, bit_count, 8, dr_tdo);
 291                 }
 292
 293                 bit_count += 8;
 294                 bits_left -= 8;
 295         }
 296
 297         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
 298         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
 299         aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
 300         AMT_AW(aw_tms_scan);
 301         if (jtag_speed > 3 || rtck_enabled)
 302                 amt_wait_scan_busy();
 303
 304         if ((type == SCAN_IN) || (type == SCAN_IO))
 305         {
 306                 AMT_DR(dr_tdo);
 307                 dr_tdo = dr_tdo >> 7;
 308                 buf_set_u32(buffer, bit_count, 1, dr_tdo);
 309         }
 310
 311         if (tms_scan[0] & 0x80)
 312         {
 313                 aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
 314                 AMT_AW(aw_tms_scan);
 315                 if (jtag_speed > 3 || rtck_enabled)
 316                         amt_wait_scan_busy();
 317         }
 318         tap_set_state(tap_get_end_state());
 319 }
 320
 321 static int amt_jtagaccel_execute_queue(void)
 322 {
 323         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 324         int scan_size;
 325         enum scan_type type;
 326         uint8_t *buffer;
 327         int retval;
 328
 329         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 330          * that wasn't handled by a caller-provided error handler
 331          */
 332         retval = ERROR_OK;
 333
 334         while (cmd)
 335         {
 336                 switch (cmd->type)
 337                 {
 338                         case JTAG_RESET:
 339 #ifdef _DEBUG_JTAG_IO_
 340                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 341 #endif
 342                                 if (cmd->cmd.reset->trst == 1)
 343                                 {
 344                                         tap_set_state(TAP_RESET);
 345                                 }
 346                                 amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 347                                 break;
 348                         case JTAG_RUNTEST:
 349 #ifdef _DEBUG_JTAG_IO_
 350                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 351 #endif
 352                                 amt_jtagaccel_end_state(cmd->cmd.runtest->end_state);
 353                                 amt_jtagaccel_runtest(cmd->cmd.runtest->num_cycles);
 354                                 break;
 355                         case JTAG_STATEMOVE:
 356 #ifdef _DEBUG_JTAG_IO_
 357                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 358 #endif
 359                                 amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
 360                                 amt_jtagaccel_state_move();
 361                                 break;
 362                         case JTAG_SCAN:
 363 #ifdef _DEBUG_JTAG_IO_
 364                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 365 #endif
 366                                 amt_jtagaccel_end_state(cmd->cmd.scan->end_state);
 367                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 368                                 type = jtag_scan_type(cmd->cmd.scan);
 369                                 amt_jtagaccel_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 370                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 371                                         retval = ERROR_JTAG_QUEUE_FAILED;
 372                                 if (buffer)
 373                                         free(buffer);
 374                                 break;
 375                         case JTAG_SLEEP:
 376 #ifdef _DEBUG_JTAG_IO_
 377                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 378 #endif
 379                                 jtag_sleep(cmd->cmd.sleep->us);
 380                                 break;
 381                         default:
 382                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 383                                 exit(-1);
 384                 }
 385                 cmd = cmd->next;
 386         }
 387
 388         return retval;
 389 }
 390
 391 #if PARPORT_USE_GIVEIO == 1
 392 int amt_jtagaccel_get_giveio_access(void)
 393 {
 394         HANDLE h;
 395         OSVERSIONINFO version;
 396
 397         version.dwOSVersionInfoSize = sizeof version;
 398         if (!GetVersionEx( &version )) {
 399         errno = EINVAL;
 400         return -1;
 401         }
 402         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 403         return 0;
 404
 405         h = CreateFile( "\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
 406         if (h == INVALID_HANDLE_VALUE) {
 407         errno = ENODEV;
 408         return -1;
 409         }
 410
 411         CloseHandle( h );
 412
 413         return 0;
 414 }
 415 #endif
 416
 417 static int amt_jtagaccel_init(void)
 418 {
 419 #if PARPORT_USE_PPDEV == 1
 420         char buffer[256];
 421         int i = 0;
 422         uint8_t control_port;
 423 #else
 424         uint8_t status_port;
 425 #endif
 426         uint8_t ar_status;
 427
 428 #if PARPORT_USE_PPDEV == 1
 429         if (device_handle > 0)
 430         {
 431                 LOG_ERROR("device is already opened");
 432                 return ERROR_JTAG_INIT_FAILED;
 433         }
 434
 435         snprintf(buffer, 256, "/dev/parport%d", amt_jtagaccel_port);
 436         device_handle = open(buffer, O_RDWR);
 437
 438         if (device_handle < 0)
 439         {
 440                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 441                 return ERROR_JTAG_INIT_FAILED;
 442         }
 443
 444         i = ioctl(device_handle, PPCLAIM);
 445         if (i < 0)
 446         {
 447                 LOG_ERROR("cannot claim device");
 448                 return ERROR_JTAG_INIT_FAILED;
 449         }
 450
 451         i = IEEE1284_MODE_EPP;
 452         i = ioctl(device_handle, PPSETMODE, & i);
 453         if (i < 0)
 454         {
 455                 LOG_ERROR(" cannot set compatible mode to device");
 456                 return ERROR_JTAG_INIT_FAILED;
 457         }
 458
 459         control_port = 0x00;
 460         i = ioctl(device_handle, PPWCONTROL, &control_port);
 461
 462         control_port = 0x04;
 463         i = ioctl(device_handle, PPWCONTROL, &control_port);
 464
 465 #else
 466         if (amt_jtagaccel_port == 0)
 467         {
 468                 amt_jtagaccel_port = 0x378;
 469                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 470         }
 471
 472 #if PARPORT_USE_GIVEIO == 1
 473         if (amt_jtagaccel_get_giveio_access() != 0) {
 474 #else /* PARPORT_USE_GIVEIO */
 475         if (ioperm(amt_jtagaccel_port, 5, 1) != 0) {
 476 #endif /* PARPORT_USE_GIVEIO */
 477                 LOG_ERROR("missing privileges for direct i/o");
 478                 return ERROR_JTAG_INIT_FAILED;
 479         }
 480
 481         /* prepare epp port */
 482         /* clear timeout */
 483         status_port = inb(amt_jtagaccel_port + 1);
 484         outb(status_port | 0x1, amt_jtagaccel_port + 1);
 485
 486         /* reset epp port */
 487         outb(0x00, amt_jtagaccel_port + 2);
 488         outb(0x04, amt_jtagaccel_port + 2);
 489 #endif
 490
 491         if (rtck_enabled)
 492         {
 493                 /* set RTCK enable bit */
 494                 aw_control_fsm |= 0x02;
 495         }
 496
 497         /* enable JTAG port */
 498         aw_control_fsm |= 0x04;
 499         AMT_AW(aw_control_fsm);
 500
 501         amt_jtagaccel_speed(jtag_get_speed());
 502
 503         enum reset_types jtag_reset_config = jtag_get_reset_config();
 504         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 505                 aw_control_rst &= ~0x8;
 506         else
 507                 aw_control_rst |= 0x8;
 508
 509         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 510                 aw_control_rst &= ~0x2;
 511         else
 512                 aw_control_rst |= 0x2;
 513
 514         amt_jtagaccel_reset(0, 0);
 515
 516         /* read status register */
 517         AMT_AR(ar_status);
 518         LOG_DEBUG("AR_STATUS: 0x%2.2x", ar_status);
 519
 520         return ERROR_OK;
 521 }
 522
 523 static int amt_jtagaccel_quit(void)
 524 {
 525
 526         return ERROR_OK;
 527 }
 528
 529 static int amt_jtagaccel_handle_parport_port_command(
 530                 struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 531 {
 532         if (argc == 1)
 533         {
 534                 /* only if the port wasn't overwritten by cmdline */
 535                 if (amt_jtagaccel_port == 0)
 536                 {
 537                         int retval = parse_u16(args[0], &amt_jtagaccel_port);
 538                         if (ERROR_OK != retval)
 539                                 return retval;
 540                 }
 541                 else
 542                 {
 543                         LOG_ERROR("The parport port was already configured!");
 544                         return ERROR_FAIL;
 545                 }
 546         }
 547
 548         command_print(cmd_ctx, "parport port = %u", amt_jtagaccel_port);
 549
 550         return ERROR_OK;
 551 }
 552
 553 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 554 {
 555         if (argc == 0)
 556         {
 557                 command_print(cmd_ctx, "amt_jtagaccel RTCK feature %s", (rtck_enabled) ? "enabled" : "disabled");
 558                 return ERROR_OK;
 559         }
 560         else
 561         {
 562                 if (strcmp(args[0], "enabled") == 0)
 563                 {
 564                         rtck_enabled = 1;
 565                 }
 566                 else
 567                 {
 568                         rtck_enabled = 0;
 569                 }
 570         }
 571
 572         return ERROR_OK;
 573 }