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