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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 "replacements.h"
  25
  26 #include "jtag.h"
  27
  28 /* system includes */
  29
  30 #ifdef _WIN32
  31 #include "errno.h"
  32 #endif /* _WIN32 */
  33
  34 #include <string.h>
  35 #include <stdlib.h>
  36
  37 #if PARPORT_USE_PPDEV == 1
  38 #include <linux/parport.h>
  39 #include <linux/ppdev.h>
  40 #include <fcntl.h>
  41 #include <sys/ioctl.h>
  42 #include <unistd.h>
  43 #else /* not PARPORT_USE_PPDEV */
  44 #ifndef _WIN32
  45 #include <sys/io.h>
  46 #endif
  47 #endif
  48
  49 #if PARPORT_USE_GIVEIO == 1
  50 #if IS_CYGWIN == 1
  51 #include <windows.h>
  52 #include <errno.h>
  53 #endif
  54 #endif
  55
  56 #include "log.h"
  57
  58 /* configuration */
  59 static u16 amt_jtagaccel_port;
  60
  61 /* interface variables
  62  */
  63 static u8 aw_control_rst = 0x00;
  64 static u8 aw_control_fsm = 0x10;
  65 static u8 aw_control_baudrate = 0x20;
  66
  67 static int rtck_enabled = 0;
  68
  69 #if PARPORT_USE_PPDEV == 1
  70 static int device_handle;
  71
  72 static int addr_mode = IEEE1284_MODE_EPP | IEEE1284_ADDR ;
  73 #define AMT_AW(val)     do { ioctl(device_handle, PPSETMODE, &addr_mode); write(device_handle, &val, 1); } while (0)
  74 #define AMT_AR(val)     do { ioctl(device_handle, PPSETMODE, &addr_mode); read(device_handle, &val, 1); } while (0)
  75
  76 static int data_mode = IEEE1284_MODE_EPP | IEEE1284_DATA ;
  77 #define AMT_DW(val)     do { ioctl(device_handle, PPSETMODE, &data_mode); write(device_handle, &val, 1); } while (0)
  78 #define AMT_DR(val)     do { ioctl(device_handle, PPSETMODE, &data_mode); read(device_handle, &val, 1); } while (0)
  79
  80 #else
  81
  82 #define AMT_AW(val)     do { outb(val, amt_jtagaccel_port + 3); } while (0)
  83 #define AMT_AR(val)     do { val = inb(amt_jtagaccel_port + 3); } while (0)
  84 #define AMT_DW(val)     do { outb(val, amt_jtagaccel_port + 4); } while (0)
  85 #define AMT_DR(val)     do { val = inb(amt_jtagaccel_port + 4); } while (0)
  86
  87 #endif // PARPORT_USE_PPDEV
  88
  89 static int amt_jtagaccel_execute_queue(void);
  90 static int amt_jtagaccel_register_commands(struct command_context_s *cmd_ctx);
  91 static int amt_jtagaccel_speed(int speed);
  92 static int amt_jtagaccel_init(void);
  93 static int amt_jtagaccel_quit(void);
  94
  95 static int amt_jtagaccel_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  96 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  97
  98 /* tap_move[i][j]: tap movement command to go from state i to state j
  99  * 0: Test-Logic-Reset
 100  * 1: Run-Test/Idle
 101  * 2: Shift-DR
 102  * 3: Pause-DR
 103  * 4: Shift-IR
 104  * 5: Pause-IR
 105  */
 106 static u8 amt_jtagaccel_tap_move[6][6][2] =
 107 {
 108         /*         RESET         IDLE        DRSHIFT       DRPAUSE       IRSHIFT       IRPAUSE             */
 109         {{0x1f, 0x00}, {0x0f, 0x00}, {0x8a, 0x04}, {0x0a, 0x00}, {0x06, 0x00}, {0x96, 0x00}},   /* RESET */
 110         {{0x1f, 0x00}, {0x00, 0x00}, {0x85, 0x08}, {0x05, 0x00}, {0x8b, 0x08}, {0x0b, 0x00}},   /* IDLE */
 111         {{0x1f, 0x00}, {0x0d, 0x00}, {0x00, 0x00}, {0x01, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRSHIFT  */
 112         {{0x1f, 0x00}, {0x0c, 0x00}, {0x08, 0x00}, {0x00, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRPAUSE  */
 113         {{0x1f, 0x00}, {0x0d, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x00, 0x00}, {0x01, 0x00}},   /* IRSHIFT  */
 114         {{0x1f, 0x00}, {0x0c, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x08, 0x00}, {0x00, 0x00}},   /* IRPAUSE  */
 115 };
 116
 117
 118 jtag_interface_t amt_jtagaccel_interface =
 119 {
 120         .name = "amt_jtagaccel",
 121
 122         .execute_queue = amt_jtagaccel_execute_queue,
 123
 124         .speed = amt_jtagaccel_speed,
 125         .register_commands = amt_jtagaccel_register_commands,
 126         .init = amt_jtagaccel_init,
 127         .quit = amt_jtagaccel_quit,
 128 };
 129
 130 static int amt_jtagaccel_register_commands(struct command_context_s *cmd_ctx)
 131 {
 132         register_command(cmd_ctx, NULL, "parport_port", amt_jtagaccel_handle_parport_port_command,
 133                                          COMMAND_CONFIG, NULL);
 134         register_command(cmd_ctx, NULL, "rtck", amt_jtagaccel_handle_rtck_command,
 135                                          COMMAND_CONFIG, NULL);
 136
 137         return ERROR_OK;
 138 }
 139
 140 static void amt_jtagaccel_reset(int trst, int srst)
 141 {
 142         if (trst == 1)
 143                 aw_control_rst |= 0x4;
 144         else if (trst == 0)
 145                 aw_control_rst &= ~0x4;
 146
 147         if (srst == 1)
 148                 aw_control_rst |= 0x1;
 149         else if (srst == 0)
 150                 aw_control_rst &= ~0x1;
 151
 152         AMT_AW(aw_control_rst);
 153 }
 154
 155 static int amt_jtagaccel_speed(int speed)
 156 {
 157         aw_control_baudrate &= 0xf0;
 158         aw_control_baudrate |= speed & 0x0f;
 159         AMT_AW(aw_control_baudrate);
 160
 161         return ERROR_OK;
 162 }
 163
 164 static void amt_jtagaccel_end_state(tap_state_t state)
 165 {
 166         if (tap_is_state_stable(state))
 167                 tap_set_end_state(state);
 168         else
 169         {
 170                 LOG_ERROR("BUG: %i is not a valid end state", state);
 171                 exit(-1);
 172         }
 173 }
 174
 175 static void amt_wait_scan_busy(void)
 176 {
 177         int timeout = 4096;
 178         u8 ar_status;
 179
 180         AMT_AR(ar_status);
 181         while (((ar_status) & 0x80) && (timeout-- > 0))
 182                 AMT_AR(ar_status);
 183
 184         if (ar_status & 0x80)
 185         {
 186                 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);
 187                 exit(-1);
 188         }
 189 }
 190
 191 static void amt_jtagaccel_state_move(void)
 192 {
 193         u8 aw_scan_tms_5;
 194         u8 tms_scan[2];
 195
 196         tap_state_t     cur_state = tap_get_state();
 197         tap_state_t     end_state = tap_get_end_state();
 198
 199         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][0];
 200         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][1];
 201
 202         aw_scan_tms_5 = 0x40 | (tms_scan[0] & 0x1f);
 203         AMT_AW(aw_scan_tms_5);
 204         if (jtag_speed > 3 || rtck_enabled)
 205                 amt_wait_scan_busy();
 206
 207         if (tms_scan[0] & 0x80)
 208         {
 209                 aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
 210                 AMT_AW(aw_scan_tms_5);
 211                 if (jtag_speed > 3 || rtck_enabled)
 212                         amt_wait_scan_busy();
 213         }
 214
 215         tap_set_state(end_state);
 216 }
 217
 218 static void amt_jtagaccel_runtest(int num_cycles)
 219 {
 220         int i = 0;
 221         u8 aw_scan_tms_5;
 222         u8 aw_scan_tms_1to4;
 223
 224         tap_state_t saved_end_state = tap_get_end_state();
 225
 226         /* only do a state_move when we're not already in IDLE */
 227         if (tap_get_state() != TAP_IDLE)
 228         {
 229                 amt_jtagaccel_end_state(TAP_IDLE);
 230                 amt_jtagaccel_state_move();
 231         }
 232
 233         while (num_cycles - i >= 5)
 234         {
 235                 aw_scan_tms_5 = 0x40;
 236                 AMT_AW(aw_scan_tms_5);
 237                 i += 5;
 238         }
 239
 240         if (num_cycles - i > 0)
 241         {
 242                 aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
 243                 AMT_AW(aw_scan_tms_1to4);
 244         }
 245
 246         amt_jtagaccel_end_state(saved_end_state);
 247         if (tap_get_state() != tap_get_end_state())
 248                 amt_jtagaccel_state_move();
 249 }
 250
 251 static void amt_jtagaccel_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 252 {
 253         int bits_left = scan_size;
 254         int bit_count = 0;
 255         tap_state_t saved_end_state = tap_get_end_state();
 256         u8 aw_tdi_option;
 257         u8 dw_tdi_scan;
 258         u8 dr_tdo;
 259         u8 aw_tms_scan;
 260         u8 tms_scan[2];
 261
 262         if (ir_scan)
 263                 amt_jtagaccel_end_state(TAP_IRSHIFT);
 264         else
 265                 amt_jtagaccel_end_state(TAP_DRSHIFT);
 266
 267         amt_jtagaccel_state_move();
 268         amt_jtagaccel_end_state(saved_end_state);
 269
 270         /* handle unaligned bits at the beginning */
 271         if ((scan_size - 1) % 8)
 272         {
 273                 aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
 274                 AMT_AW(aw_tdi_option);
 275
 276                 dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
 277                 AMT_DW(dw_tdi_scan);
 278                 if (jtag_speed > 3 || rtck_enabled)
 279                         amt_wait_scan_busy();
 280
 281                 if ((type == SCAN_IN) || (type == SCAN_IO))
 282                 {
 283                         AMT_DR(dr_tdo);
 284                         dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
 285                         buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
 286                 }
 287
 288                 bit_count += (scan_size - 1) % 8;
 289                 bits_left -= (scan_size - 1) % 8;
 290         }
 291
 292         while (bits_left - 1 >= 8)
 293         {
 294                 dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
 295                 AMT_DW(dw_tdi_scan);
 296                 if (jtag_speed > 3 || rtck_enabled)
 297                         amt_wait_scan_busy();
 298
 299                 if ((type == SCAN_IN) || (type == SCAN_IO))
 300                 {
 301                         AMT_DR(dr_tdo);
 302                         buf_set_u32(buffer, bit_count, 8, dr_tdo);
 303                 }
 304
 305                 bit_count += 8;
 306                 bits_left -= 8;
 307         }
 308
 309         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
 310         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
 311         aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
 312         AMT_AW(aw_tms_scan);
 313         if (jtag_speed > 3 || rtck_enabled)
 314                 amt_wait_scan_busy();
 315
 316         if ((type == SCAN_IN) || (type == SCAN_IO))
 317         {
 318                 AMT_DR(dr_tdo);
 319                 dr_tdo = dr_tdo >> 7;
 320                 buf_set_u32(buffer, bit_count, 1, dr_tdo);
 321         }
 322
 323         if (tms_scan[0] & 0x80)
 324         {
 325                 aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
 326                 AMT_AW(aw_tms_scan);
 327                 if (jtag_speed > 3 || rtck_enabled)
 328                         amt_wait_scan_busy();
 329         }
 330         tap_set_state(tap_get_end_state());
 331 }
 332
 333 static int amt_jtagaccel_execute_queue(void)
 334 {
 335         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 336         int scan_size;
 337         enum scan_type type;
 338         u8 *buffer;
 339         int retval;
 340
 341         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 342          * that wasn't handled by a caller-provided error handler
 343          */
 344         retval = ERROR_OK;
 345
 346         while (cmd)
 347         {
 348                 switch (cmd->type)
 349                 {
 350                         case JTAG_END_STATE:
 351 #ifdef _DEBUG_JTAG_IO_
 352                                 LOG_DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
 353 #endif
 354                                 if (cmd->cmd.end_state->end_state != TAP_INVALID)
 355                                         amt_jtagaccel_end_state(cmd->cmd.end_state->end_state);
 356                                 break;
 357                         case JTAG_RESET:
 358 #ifdef _DEBUG_JTAG_IO_
 359                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 360 #endif
 361                                 if (cmd->cmd.reset->trst == 1)
 362                                 {
 363                                         tap_set_state(TAP_RESET);
 364                                 }
 365                                 amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 366                                 break;
 367                         case JTAG_RUNTEST:
 368 #ifdef _DEBUG_JTAG_IO_
 369                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 370 #endif
 371                                 if (cmd->cmd.runtest->end_state != TAP_INVALID)
 372                                         amt_jtagaccel_end_state(cmd->cmd.runtest->end_state);
 373                                 amt_jtagaccel_runtest(cmd->cmd.runtest->num_cycles);
 374                                 break;
 375                         case JTAG_STATEMOVE:
 376 #ifdef _DEBUG_JTAG_IO_
 377                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 378 #endif
 379                                 if (cmd->cmd.statemove->end_state != TAP_INVALID)
 380                                         amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
 381                                 amt_jtagaccel_state_move();
 382                                 break;
 383                         case JTAG_SCAN:
 384 #ifdef _DEBUG_JTAG_IO_
 385                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 386 #endif
 387                                 if (cmd->cmd.scan->end_state != TAP_INVALID)
 388                                         amt_jtagaccel_end_state(cmd->cmd.scan->end_state);
 389                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 390                                 type = jtag_scan_type(cmd->cmd.scan);
 391                                 amt_jtagaccel_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 392                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 393                                         retval = ERROR_JTAG_QUEUE_FAILED;
 394                                 if (buffer)
 395                                         free(buffer);
 396                                 break;
 397                         case JTAG_SLEEP:
 398 #ifdef _DEBUG_JTAG_IO_
 399                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 400 #endif
 401                                 jtag_sleep(cmd->cmd.sleep->us);
 402                                 break;
 403                         default:
 404                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 405                                 exit(-1);
 406                 }
 407                 cmd = cmd->next;
 408         }
 409
 410         return retval;
 411 }
 412
 413 #if PARPORT_USE_GIVEIO == 1
 414 int amt_jtagaccel_get_giveio_access(void)
 415 {
 416         HANDLE h;
 417         OSVERSIONINFO version;
 418
 419         version.dwOSVersionInfoSize = sizeof version;
 420         if (!GetVersionEx( &version )) {
 421         errno = EINVAL;
 422         return -1;
 423         }
 424         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 425         return 0;
 426
 427         h = CreateFile( "\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
 428         if (h == INVALID_HANDLE_VALUE) {
 429         errno = ENODEV;
 430         return -1;
 431         }
 432
 433         CloseHandle( h );
 434
 435         return 0;
 436 }
 437 #endif
 438
 439 static int amt_jtagaccel_init(void)
 440 {
 441 #if PARPORT_USE_PPDEV == 1
 442         char buffer[256];
 443         int i = 0;
 444         u8 control_port;
 445 #else
 446         u8 status_port;
 447 #endif
 448         u8 ar_status;
 449
 450 #if PARPORT_USE_PPDEV == 1
 451         if (device_handle > 0)
 452         {
 453                 LOG_ERROR("device is already opened");
 454                 return ERROR_JTAG_INIT_FAILED;
 455         }
 456
 457         snprintf(buffer, 256, "/dev/parport%d", amt_jtagaccel_port);
 458         device_handle = open(buffer, O_RDWR);
 459
 460         if (device_handle < 0)
 461         {
 462                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 463                 return ERROR_JTAG_INIT_FAILED;
 464         }
 465
 466         i = ioctl(device_handle, PPCLAIM);
 467         if (i < 0)
 468         {
 469                 LOG_ERROR("cannot claim device");
 470                 return ERROR_JTAG_INIT_FAILED;
 471         }
 472
 473         i = IEEE1284_MODE_EPP;
 474         i = ioctl(device_handle, PPSETMODE, & i);
 475         if (i < 0)
 476         {
 477                 LOG_ERROR(" cannot set compatible mode to device");
 478                 return ERROR_JTAG_INIT_FAILED;
 479         }
 480
 481         control_port = 0x00;
 482         i = ioctl(device_handle, PPWCONTROL, &control_port);
 483
 484         control_port = 0x04;
 485         i = ioctl(device_handle, PPWCONTROL, &control_port);
 486
 487 #else
 488         if (amt_jtagaccel_port == 0)
 489         {
 490                 amt_jtagaccel_port = 0x378;
 491                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 492         }
 493
 494 #if PARPORT_USE_GIVEIO == 1
 495         if (amt_jtagaccel_get_giveio_access() != 0) {
 496 #else /* PARPORT_USE_GIVEIO */
 497         if (ioperm(amt_jtagaccel_port, 5, 1) != 0) {
 498 #endif /* PARPORT_USE_GIVEIO */
 499                 LOG_ERROR("missing privileges for direct i/o");
 500                 return ERROR_JTAG_INIT_FAILED;
 501         }
 502
 503         /* prepare epp port */
 504         /* clear timeout */
 505         status_port = inb(amt_jtagaccel_port + 1);
 506         outb(status_port | 0x1, amt_jtagaccel_port + 1);
 507
 508         /* reset epp port */
 509         outb(0x00, amt_jtagaccel_port + 2);
 510         outb(0x04, amt_jtagaccel_port + 2);
 511 #endif
 512
 513         if (rtck_enabled)
 514         {
 515                 /* set RTCK enable bit */
 516                 aw_control_fsm |= 0x02;
 517         }
 518
 519         /* enable JTAG port */
 520         aw_control_fsm |= 0x04;
 521         AMT_AW(aw_control_fsm);
 522
 523         amt_jtagaccel_speed(jtag_speed);
 524
 525         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 526                 aw_control_rst &= ~0x8;
 527         else
 528                 aw_control_rst |= 0x8;
 529
 530         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 531                 aw_control_rst &= ~0x2;
 532         else
 533                 aw_control_rst |= 0x2;
 534
 535         amt_jtagaccel_reset(0, 0);
 536
 537         /* read status register */
 538         AMT_AR(ar_status);
 539         LOG_DEBUG("AR_STATUS: 0x%2.2x", ar_status);
 540
 541         return ERROR_OK;
 542 }
 543
 544 static int amt_jtagaccel_quit(void)
 545 {
 546
 547         return ERROR_OK;
 548 }
 549
 550 static int amt_jtagaccel_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 551 {
 552         if (argc == 0)
 553                 return ERROR_OK;
 554
 555         /* only if the port wasn't overwritten by cmdline */
 556         if (amt_jtagaccel_port == 0)
 557                 amt_jtagaccel_port = strtoul(args[0], NULL, 0);
 558
 559         return ERROR_OK;
 560 }
 561
 562 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 563 {
 564         if (argc == 0)
 565         {
 566                 command_print(cmd_ctx, "amt_jtagaccel RTCK feature %s", (rtck_enabled) ? "enabled" : "disabled");
 567                 return ERROR_OK;
 568         }
 569         else
 570         {
 571                 if (strcmp(args[0], "enabled") == 0)
 572                 {
 573                         rtck_enabled = 1;
 574                 }
 575                 else
 576                 {
 577                         rtck_enabled = 0;
 578                 }
 579         }
 580
 581         return ERROR_OK;
 582 }