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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 #define INCLUDE_JTAG_INTERFACE_H
  25 #include "interface.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 u8 aw_control_rst = 0x00;
  50 static u8 aw_control_fsm = 0x10;
  51 static u8 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 u8 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         u8 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         u8 aw_scan_tms_5;
 180         u8 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         if (jtag_speed > 3 || rtck_enabled)
 191                 amt_wait_scan_busy();
 192
 193         if (tms_scan[0] & 0x80)
 194         {
 195                 aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
 196                 AMT_AW(aw_scan_tms_5);
 197                 if (jtag_speed > 3 || rtck_enabled)
 198                         amt_wait_scan_busy();
 199         }
 200
 201         tap_set_state(end_state);
 202 }
 203
 204 static void amt_jtagaccel_runtest(int num_cycles)
 205 {
 206         int i = 0;
 207         u8 aw_scan_tms_5;
 208         u8 aw_scan_tms_1to4;
 209
 210         tap_state_t saved_end_state = tap_get_end_state();
 211
 212         /* only do a state_move when we're not already in IDLE */
 213         if (tap_get_state() != TAP_IDLE)
 214         {
 215                 amt_jtagaccel_end_state(TAP_IDLE);
 216                 amt_jtagaccel_state_move();
 217         }
 218
 219         while (num_cycles - i >= 5)
 220         {
 221                 aw_scan_tms_5 = 0x40;
 222                 AMT_AW(aw_scan_tms_5);
 223                 i += 5;
 224         }
 225
 226         if (num_cycles - i > 0)
 227         {
 228                 aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
 229                 AMT_AW(aw_scan_tms_1to4);
 230         }
 231
 232         amt_jtagaccel_end_state(saved_end_state);
 233         if (tap_get_state() != tap_get_end_state())
 234                 amt_jtagaccel_state_move();
 235 }
 236
 237 static void amt_jtagaccel_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 238 {
 239         int bits_left = scan_size;
 240         int bit_count = 0;
 241         tap_state_t saved_end_state = tap_get_end_state();
 242         u8 aw_tdi_option;
 243         u8 dw_tdi_scan;
 244         u8 dr_tdo;
 245         u8 aw_tms_scan;
 246         u8 tms_scan[2];
 247
 248         if (ir_scan)
 249                 amt_jtagaccel_end_state(TAP_IRSHIFT);
 250         else
 251                 amt_jtagaccel_end_state(TAP_DRSHIFT);
 252
 253         amt_jtagaccel_state_move();
 254         amt_jtagaccel_end_state(saved_end_state);
 255
 256         /* handle unaligned bits at the beginning */
 257         if ((scan_size - 1) % 8)
 258         {
 259                 aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
 260                 AMT_AW(aw_tdi_option);
 261
 262                 dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
 263                 AMT_DW(dw_tdi_scan);
 264                 if (jtag_speed > 3 || rtck_enabled)
 265                         amt_wait_scan_busy();
 266
 267                 if ((type == SCAN_IN) || (type == SCAN_IO))
 268                 {
 269                         AMT_DR(dr_tdo);
 270                         dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
 271                         buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
 272                 }
 273
 274                 bit_count += (scan_size - 1) % 8;
 275                 bits_left -= (scan_size - 1) % 8;
 276         }
 277
 278         while (bits_left - 1 >= 8)
 279         {
 280                 dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
 281                 AMT_DW(dw_tdi_scan);
 282                 if (jtag_speed > 3 || rtck_enabled)
 283                         amt_wait_scan_busy();
 284
 285                 if ((type == SCAN_IN) || (type == SCAN_IO))
 286                 {
 287                         AMT_DR(dr_tdo);
 288                         buf_set_u32(buffer, bit_count, 8, dr_tdo);
 289                 }
 290
 291                 bit_count += 8;
 292                 bits_left -= 8;
 293         }
 294
 295         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
 296         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
 297         aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
 298         AMT_AW(aw_tms_scan);
 299         if (jtag_speed > 3 || rtck_enabled)
 300                 amt_wait_scan_busy();
 301
 302         if ((type == SCAN_IN) || (type == SCAN_IO))
 303         {
 304                 AMT_DR(dr_tdo);
 305                 dr_tdo = dr_tdo >> 7;
 306                 buf_set_u32(buffer, bit_count, 1, dr_tdo);
 307         }
 308
 309         if (tms_scan[0] & 0x80)
 310         {
 311                 aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
 312                 AMT_AW(aw_tms_scan);
 313                 if (jtag_speed > 3 || rtck_enabled)
 314                         amt_wait_scan_busy();
 315         }
 316         tap_set_state(tap_get_end_state());
 317 }
 318
 319 static int amt_jtagaccel_execute_queue(void)
 320 {
 321         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 322         int scan_size;
 323         enum scan_type type;
 324         u8 *buffer;
 325         int retval;
 326
 327         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 328          * that wasn't handled by a caller-provided error handler
 329          */
 330         retval = ERROR_OK;
 331
 332         while (cmd)
 333         {
 334                 switch (cmd->type)
 335                 {
 336                         case JTAG_RESET:
 337 #ifdef _DEBUG_JTAG_IO_
 338                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 339 #endif
 340                                 if (cmd->cmd.reset->trst == 1)
 341                                 {
 342                                         tap_set_state(TAP_RESET);
 343                                 }
 344                                 amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 345                                 break;
 346                         case JTAG_RUNTEST:
 347 #ifdef _DEBUG_JTAG_IO_
 348                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 349 #endif
 350                                 amt_jtagaccel_end_state(cmd->cmd.runtest->end_state);
 351                                 amt_jtagaccel_runtest(cmd->cmd.runtest->num_cycles);
 352                                 break;
 353                         case JTAG_STATEMOVE:
 354 #ifdef _DEBUG_JTAG_IO_
 355                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 356 #endif
 357                                 amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
 358                                 amt_jtagaccel_state_move();
 359                                 break;
 360                         case JTAG_SCAN:
 361 #ifdef _DEBUG_JTAG_IO_
 362                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 363 #endif
 364                                 amt_jtagaccel_end_state(cmd->cmd.scan->end_state);
 365                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 366                                 type = jtag_scan_type(cmd->cmd.scan);
 367                                 amt_jtagaccel_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 368                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 369                                         retval = ERROR_JTAG_QUEUE_FAILED;
 370                                 if (buffer)
 371                                         free(buffer);
 372                                 break;
 373                         case JTAG_SLEEP:
 374 #ifdef _DEBUG_JTAG_IO_
 375                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 376 #endif
 377                                 jtag_sleep(cmd->cmd.sleep->us);
 378                                 break;
 379                         default:
 380                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 381                                 exit(-1);
 382                 }
 383                 cmd = cmd->next;
 384         }
 385
 386         return retval;
 387 }
 388
 389 #if PARPORT_USE_GIVEIO == 1
 390 int amt_jtagaccel_get_giveio_access(void)
 391 {
 392         HANDLE h;
 393         OSVERSIONINFO version;
 394
 395         version.dwOSVersionInfoSize = sizeof version;
 396         if (!GetVersionEx( &version )) {
 397         errno = EINVAL;
 398         return -1;
 399         }
 400         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 401         return 0;
 402
 403         h = CreateFile( "\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
 404         if (h == INVALID_HANDLE_VALUE) {
 405         errno = ENODEV;
 406         return -1;
 407         }
 408
 409         CloseHandle( h );
 410
 411         return 0;
 412 }
 413 #endif
 414
 415 static int amt_jtagaccel_init(void)
 416 {
 417 #if PARPORT_USE_PPDEV == 1
 418         char buffer[256];
 419         int i = 0;
 420         u8 control_port;
 421 #else
 422         u8 status_port;
 423 #endif
 424         u8 ar_status;
 425
 426 #if PARPORT_USE_PPDEV == 1
 427         if (device_handle > 0)
 428         {
 429                 LOG_ERROR("device is already opened");
 430                 return ERROR_JTAG_INIT_FAILED;
 431         }
 432
 433         snprintf(buffer, 256, "/dev/parport%d", amt_jtagaccel_port);
 434         device_handle = open(buffer, O_RDWR);
 435
 436         if (device_handle < 0)
 437         {
 438                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 439                 return ERROR_JTAG_INIT_FAILED;
 440         }
 441
 442         i = ioctl(device_handle, PPCLAIM);
 443         if (i < 0)
 444         {
 445                 LOG_ERROR("cannot claim device");
 446                 return ERROR_JTAG_INIT_FAILED;
 447         }
 448
 449         i = IEEE1284_MODE_EPP;
 450         i = ioctl(device_handle, PPSETMODE, & i);
 451         if (i < 0)
 452         {
 453                 LOG_ERROR(" cannot set compatible mode to device");
 454                 return ERROR_JTAG_INIT_FAILED;
 455         }
 456
 457         control_port = 0x00;
 458         i = ioctl(device_handle, PPWCONTROL, &control_port);
 459
 460         control_port = 0x04;
 461         i = ioctl(device_handle, PPWCONTROL, &control_port);
 462
 463 #else
 464         if (amt_jtagaccel_port == 0)
 465         {
 466                 amt_jtagaccel_port = 0x378;
 467                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 468         }
 469
 470 #if PARPORT_USE_GIVEIO == 1
 471         if (amt_jtagaccel_get_giveio_access() != 0) {
 472 #else /* PARPORT_USE_GIVEIO */
 473         if (ioperm(amt_jtagaccel_port, 5, 1) != 0) {
 474 #endif /* PARPORT_USE_GIVEIO */
 475                 LOG_ERROR("missing privileges for direct i/o");
 476                 return ERROR_JTAG_INIT_FAILED;
 477         }
 478
 479         /* prepare epp port */
 480         /* clear timeout */
 481         status_port = inb(amt_jtagaccel_port + 1);
 482         outb(status_port | 0x1, amt_jtagaccel_port + 1);
 483
 484         /* reset epp port */
 485         outb(0x00, amt_jtagaccel_port + 2);
 486         outb(0x04, amt_jtagaccel_port + 2);
 487 #endif
 488
 489         if (rtck_enabled)
 490         {
 491                 /* set RTCK enable bit */
 492                 aw_control_fsm |= 0x02;
 493         }
 494
 495         /* enable JTAG port */
 496         aw_control_fsm |= 0x04;
 497         AMT_AW(aw_control_fsm);
 498
 499         amt_jtagaccel_speed(jtag_speed);
 500
 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 static int amt_jtagaccel_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 527 {
 528         if (argc == 0)
 529                 return ERROR_OK;
 530
 531         /* only if the port wasn't overwritten by cmdline */
 532         if (amt_jtagaccel_port == 0)
 533                 amt_jtagaccel_port = strtoul(args[0], NULL, 0);
 534
 535         return ERROR_OK;
 536 }
 537
 538 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 539 {
 540         if (argc == 0)
 541         {
 542                 command_print(cmd_ctx, "amt_jtagaccel RTCK feature %s", (rtck_enabled) ? "enabled" : "disabled");
 543                 return ERROR_OK;
 544         }
 545         else
 546         {
 547                 if (strcmp(args[0], "enabled") == 0)
 548                 {
 549                         rtck_enabled = 1;
 550                 }
 551                 else
 552                 {
 553                         rtck_enabled = 0;
 554                 }
 555         }
 556
 557         return ERROR_OK;
 558 }