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