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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 "jtag.h"
  25
  26
  27 #if PARPORT_USE_PPDEV == 1
  28 #include <linux/parport.h>
  29 #include <linux/ppdev.h>
  30 #include <sys/ioctl.h>
  31 #else /* not PARPORT_USE_PPDEV */
  32 #ifndef _WIN32
  33 #include <sys/io.h>
  34 #endif
  35 #endif
  36
  37 #if PARPORT_USE_GIVEIO == 1
  38 #if IS_CYGWIN == 1
  39 #include <windows.h>
  40 #endif
  41 #endif
  42
  43 /* configuration */
  44 static u16 amt_jtagaccel_port;
  45
  46 /* interface variables
  47  */
  48 static u8 aw_control_rst = 0x00;
  49 static u8 aw_control_fsm = 0x10;
  50 static u8 aw_control_baudrate = 0x20;
  51
  52 static int rtck_enabled = 0;
  53
  54 #if PARPORT_USE_PPDEV == 1
  55 static int device_handle;
  56
  57 static int addr_mode = IEEE1284_MODE_EPP | IEEE1284_ADDR ;
  58 #define AMT_AW(val)     do { ioctl(device_handle, PPSETMODE, &addr_mode); write(device_handle, &val, 1); } while (0)
  59 #define AMT_AR(val)     do { ioctl(device_handle, PPSETMODE, &addr_mode); read(device_handle, &val, 1); } while (0)
  60
  61 static int data_mode = IEEE1284_MODE_EPP | IEEE1284_DATA ;
  62 #define AMT_DW(val)     do { ioctl(device_handle, PPSETMODE, &data_mode); write(device_handle, &val, 1); } while (0)
  63 #define AMT_DR(val)     do { ioctl(device_handle, PPSETMODE, &data_mode); read(device_handle, &val, 1); } while (0)
  64
  65 #else
  66
  67 #define AMT_AW(val)     do { outb(val, amt_jtagaccel_port + 3); } while (0)
  68 #define AMT_AR(val)     do { val = inb(amt_jtagaccel_port + 3); } while (0)
  69 #define AMT_DW(val)     do { outb(val, amt_jtagaccel_port + 4); } while (0)
  70 #define AMT_DR(val)     do { val = inb(amt_jtagaccel_port + 4); } while (0)
  71
  72 #endif // PARPORT_USE_PPDEV
  73
  74 static int amt_jtagaccel_execute_queue(void);
  75 static int amt_jtagaccel_register_commands(struct command_context_s *cmd_ctx);
  76 static int amt_jtagaccel_speed(int speed);
  77 static int amt_jtagaccel_init(void);
  78 static int amt_jtagaccel_quit(void);
  79
  80 static int amt_jtagaccel_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  81 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  82
  83 /* tap_move[i][j]: tap movement command to go from state i to state j
  84  * 0: Test-Logic-Reset
  85  * 1: Run-Test/Idle
  86  * 2: Shift-DR
  87  * 3: Pause-DR
  88  * 4: Shift-IR
  89  * 5: Pause-IR
  90  */
  91 static u8 amt_jtagaccel_tap_move[6][6][2] =
  92 {
  93         /*         RESET         IDLE        DRSHIFT       DRPAUSE       IRSHIFT       IRPAUSE             */
  94         {{0x1f, 0x00}, {0x0f, 0x00}, {0x8a, 0x04}, {0x0a, 0x00}, {0x06, 0x00}, {0x96, 0x00}},   /* RESET */
  95         {{0x1f, 0x00}, {0x00, 0x00}, {0x85, 0x08}, {0x05, 0x00}, {0x8b, 0x08}, {0x0b, 0x00}},   /* IDLE */
  96         {{0x1f, 0x00}, {0x0d, 0x00}, {0x00, 0x00}, {0x01, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRSHIFT  */
  97         {{0x1f, 0x00}, {0x0c, 0x00}, {0x08, 0x00}, {0x00, 0x00}, {0x8f, 0x09}, {0x8f, 0x01}},   /* DRPAUSE  */
  98         {{0x1f, 0x00}, {0x0d, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x00, 0x00}, {0x01, 0x00}},   /* IRSHIFT  */
  99         {{0x1f, 0x00}, {0x0c, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x08, 0x00}, {0x00, 0x00}},   /* IRPAUSE  */
 100 };
 101
 102
 103 jtag_interface_t amt_jtagaccel_interface =
 104 {
 105         .name = "amt_jtagaccel",
 106
 107         .execute_queue = amt_jtagaccel_execute_queue,
 108
 109         .speed = amt_jtagaccel_speed,
 110         .register_commands = amt_jtagaccel_register_commands,
 111         .init = amt_jtagaccel_init,
 112         .quit = amt_jtagaccel_quit,
 113 };
 114
 115 static int amt_jtagaccel_register_commands(struct command_context_s *cmd_ctx)
 116 {
 117         register_command(cmd_ctx, NULL, "parport_port", amt_jtagaccel_handle_parport_port_command,
 118                                          COMMAND_CONFIG, NULL);
 119         register_command(cmd_ctx, NULL, "rtck", amt_jtagaccel_handle_rtck_command,
 120                                          COMMAND_CONFIG, NULL);
 121
 122         return ERROR_OK;
 123 }
 124
 125 static void amt_jtagaccel_reset(int trst, int srst)
 126 {
 127         if (trst == 1)
 128                 aw_control_rst |= 0x4;
 129         else if (trst == 0)
 130                 aw_control_rst &= ~0x4;
 131
 132         if (srst == 1)
 133                 aw_control_rst |= 0x1;
 134         else if (srst == 0)
 135                 aw_control_rst &= ~0x1;
 136
 137         AMT_AW(aw_control_rst);
 138 }
 139
 140 static int amt_jtagaccel_speed(int speed)
 141 {
 142         aw_control_baudrate &= 0xf0;
 143         aw_control_baudrate |= speed & 0x0f;
 144         AMT_AW(aw_control_baudrate);
 145
 146         return ERROR_OK;
 147 }
 148
 149 static void amt_jtagaccel_end_state(tap_state_t state)
 150 {
 151         if (tap_is_state_stable(state))
 152                 tap_set_end_state(state);
 153         else
 154         {
 155                 LOG_ERROR("BUG: %i is not a valid end state", state);
 156                 exit(-1);
 157         }
 158 }
 159
 160 static void amt_wait_scan_busy(void)
 161 {
 162         int timeout = 4096;
 163         u8 ar_status;
 164
 165         AMT_AR(ar_status);
 166         while (((ar_status) & 0x80) && (timeout-- > 0))
 167                 AMT_AR(ar_status);
 168
 169         if (ar_status & 0x80)
 170         {
 171                 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);
 172                 exit(-1);
 173         }
 174 }
 175
 176 static void amt_jtagaccel_state_move(void)
 177 {
 178         u8 aw_scan_tms_5;
 179         u8 tms_scan[2];
 180
 181         tap_state_t     cur_state = tap_get_state();
 182         tap_state_t     end_state = tap_get_end_state();
 183
 184         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][0];
 185         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][1];
 186
 187         aw_scan_tms_5 = 0x40 | (tms_scan[0] & 0x1f);
 188         AMT_AW(aw_scan_tms_5);
 189         if (jtag_speed > 3 || rtck_enabled)
 190                 amt_wait_scan_busy();
 191
 192         if (tms_scan[0] & 0x80)
 193         {
 194                 aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
 195                 AMT_AW(aw_scan_tms_5);
 196                 if (jtag_speed > 3 || rtck_enabled)
 197                         amt_wait_scan_busy();
 198         }
 199
 200         tap_set_state(end_state);
 201 }
 202
 203 static void amt_jtagaccel_runtest(int num_cycles)
 204 {
 205         int i = 0;
 206         u8 aw_scan_tms_5;
 207         u8 aw_scan_tms_1to4;
 208
 209         tap_state_t saved_end_state = tap_get_end_state();
 210
 211         /* only do a state_move when we're not already in IDLE */
 212         if (tap_get_state() != TAP_IDLE)
 213         {
 214                 amt_jtagaccel_end_state(TAP_IDLE);
 215                 amt_jtagaccel_state_move();
 216         }
 217
 218         while (num_cycles - i >= 5)
 219         {
 220                 aw_scan_tms_5 = 0x40;
 221                 AMT_AW(aw_scan_tms_5);
 222                 i += 5;
 223         }
 224
 225         if (num_cycles - i > 0)
 226         {
 227                 aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
 228                 AMT_AW(aw_scan_tms_1to4);
 229         }
 230
 231         amt_jtagaccel_end_state(saved_end_state);
 232         if (tap_get_state() != tap_get_end_state())
 233                 amt_jtagaccel_state_move();
 234 }
 235
 236 static void amt_jtagaccel_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 237 {
 238         int bits_left = scan_size;
 239         int bit_count = 0;
 240         tap_state_t saved_end_state = tap_get_end_state();
 241         u8 aw_tdi_option;
 242         u8 dw_tdi_scan;
 243         u8 dr_tdo;
 244         u8 aw_tms_scan;
 245         u8 tms_scan[2];
 246
 247         if (ir_scan)
 248                 amt_jtagaccel_end_state(TAP_IRSHIFT);
 249         else
 250                 amt_jtagaccel_end_state(TAP_DRSHIFT);
 251
 252         amt_jtagaccel_state_move();
 253         amt_jtagaccel_end_state(saved_end_state);
 254
 255         /* handle unaligned bits at the beginning */
 256         if ((scan_size - 1) % 8)
 257         {
 258                 aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
 259                 AMT_AW(aw_tdi_option);
 260
 261                 dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
 262                 AMT_DW(dw_tdi_scan);
 263                 if (jtag_speed > 3 || rtck_enabled)
 264                         amt_wait_scan_busy();
 265
 266                 if ((type == SCAN_IN) || (type == SCAN_IO))
 267                 {
 268                         AMT_DR(dr_tdo);
 269                         dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
 270                         buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
 271                 }
 272
 273                 bit_count += (scan_size - 1) % 8;
 274                 bits_left -= (scan_size - 1) % 8;
 275         }
 276
 277         while (bits_left - 1 >= 8)
 278         {
 279                 dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
 280                 AMT_DW(dw_tdi_scan);
 281                 if (jtag_speed > 3 || rtck_enabled)
 282                         amt_wait_scan_busy();
 283
 284                 if ((type == SCAN_IN) || (type == SCAN_IO))
 285                 {
 286                         AMT_DR(dr_tdo);
 287                         buf_set_u32(buffer, bit_count, 8, dr_tdo);
 288                 }
 289
 290                 bit_count += 8;
 291                 bits_left -= 8;
 292         }
 293
 294         tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
 295         tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
 296         aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
 297         AMT_AW(aw_tms_scan);
 298         if (jtag_speed > 3 || rtck_enabled)
 299                 amt_wait_scan_busy();
 300
 301         if ((type == SCAN_IN) || (type == SCAN_IO))
 302         {
 303                 AMT_DR(dr_tdo);
 304                 dr_tdo = dr_tdo >> 7;
 305                 buf_set_u32(buffer, bit_count, 1, dr_tdo);
 306         }
 307
 308         if (tms_scan[0] & 0x80)
 309         {
 310                 aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
 311                 AMT_AW(aw_tms_scan);
 312                 if (jtag_speed > 3 || rtck_enabled)
 313                         amt_wait_scan_busy();
 314         }
 315         tap_set_state(tap_get_end_state());
 316 }
 317
 318 static int amt_jtagaccel_execute_queue(void)
 319 {
 320         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 321         int scan_size;
 322         enum scan_type type;
 323         u8 *buffer;
 324         int retval;
 325
 326         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 327          * that wasn't handled by a caller-provided error handler
 328          */
 329         retval = ERROR_OK;
 330
 331         while (cmd)
 332         {
 333                 switch (cmd->type)
 334                 {
 335                         case JTAG_RESET:
 336 #ifdef _DEBUG_JTAG_IO_
 337                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 338 #endif
 339                                 if (cmd->cmd.reset->trst == 1)
 340                                 {
 341                                         tap_set_state(TAP_RESET);
 342                                 }
 343                                 amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 344                                 break;
 345                         case JTAG_RUNTEST:
 346 #ifdef _DEBUG_JTAG_IO_
 347                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 348 #endif
 349                                 if (cmd->cmd.runtest->end_state != TAP_INVALID)
 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                                 if (cmd->cmd.statemove->end_state != TAP_INVALID)
 358                                         amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
 359                                 amt_jtagaccel_state_move();
 360                                 break;
 361                         case JTAG_SCAN:
 362 #ifdef _DEBUG_JTAG_IO_
 363                                 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
 364 #endif
 365                                 if (cmd->cmd.scan->end_state != TAP_INVALID)
 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         u8 control_port;
 423 #else
 424         u8 status_port;
 425 #endif
 426         u8 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_speed);
 502
 503         if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
 504                 aw_control_rst &= ~0x8;
 505         else
 506                 aw_control_rst |= 0x8;
 507
 508         if (jtag_reset_config & RESET_SRST_PUSH_PULL)
 509                 aw_control_rst &= ~0x2;
 510         else
 511                 aw_control_rst |= 0x2;
 512
 513         amt_jtagaccel_reset(0, 0);
 514
 515         /* read status register */
 516         AMT_AR(ar_status);
 517         LOG_DEBUG("AR_STATUS: 0x%2.2x", ar_status);
 518
 519         return ERROR_OK;
 520 }
 521
 522 static int amt_jtagaccel_quit(void)
 523 {
 524
 525         return ERROR_OK;
 526 }
 527
 528 static int amt_jtagaccel_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 529 {
 530         if (argc == 0)
 531                 return ERROR_OK;
 532
 533         /* only if the port wasn't overwritten by cmdline */
 534         if (amt_jtagaccel_port == 0)
 535                 amt_jtagaccel_port = strtoul(args[0], NULL, 0);
 536
 537         return ERROR_OK;
 538 }
 539
 540 static int amt_jtagaccel_handle_rtck_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 541 {
 542         if (argc == 0)
 543         {
 544                 command_print(cmd_ctx, "amt_jtagaccel RTCK feature %s", (rtck_enabled) ? "enabled" : "disabled");
 545                 return ERROR_OK;
 546         }
 547         else
 548         {
 549                 if (strcmp(args[0], "enabled") == 0)
 550                 {
 551                         rtck_enabled = 1;
 552                 }
 553                 else
 554                 {
 555                         rtck_enabled = 0;
 556                 }
 557         }
 558
 559         return ERROR_OK;
 560 }