git.gag.com Git - fw/openocd/blob - src/jtag/gw16012.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 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 #if 1
  29 #define _DEBUG_GW16012_IO_
  30 #endif
  31
  32 /* system includes */
  33 /*  -ino: 060521-1036 */
  34 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  35
  36 #include <sys/types.h>
  37 #include <machine/sysarch.h>
  38 #include <machine/cpufunc.h>
  39 #define ioperm(startport,length,enable)\
  40   i386_set_ioperm((startport), (length), (enable))
  41
  42 #else
  43
  44 #ifdef _WIN32
  45 #include "errno.h"
  46 #endif /* _WIN32 */
  47
  48 #endif /* __FreeBSD__, __FreeBSD_kernel__ */
  49
  50 #include <string.h>
  51 #include <stdlib.h>
  52
  53 #include <sys/time.h>
  54 #include <time.h>
  55
  56 #if PARPORT_USE_PPDEV == 1
  57 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  58 #include <dev/ppbus/ppi.h>
  59 #include <dev/ppbus/ppbconf.h>
  60 #define PPRSTATUS       PPIGSTATUS
  61 #define PPWDATA         PPISDATA
  62 #else
  63 #include <linux/parport.h>
  64 #include <linux/ppdev.h>
  65 #endif
  66 #include <fcntl.h>
  67 #include <sys/ioctl.h>
  68 #else /* not PARPORT_USE_PPDEV */
  69 #ifndef _WIN32
  70 #include <sys/io.h>
  71 #endif
  72 #endif
  73
  74 #if PARPORT_USE_GIVEIO == 1
  75 #if IS_CYGWIN == 1
  76 #include <windows.h>
  77 #include <errno.h>
  78 #undef ERROR
  79 #endif
  80 #endif
  81
  82 #include "log.h"
  83
  84 /* configuration */
  85 u16 gw16012_port;
  86
  87 /* interface variables
  88  */
  89 static u8 gw16012_msb = 0x0;
  90 static u8 gw16012_control_value = 0x0;
  91
  92 #if PARPORT_USE_PPDEV == 1
  93 static int device_handle;
  94 #endif
  95
  96 int gw16012_execute_queue(void);
  97 int gw16012_register_commands(struct command_context_s *cmd_ctx);
  98 int gw16012_speed(int speed);
  99 int gw16012_init(void);
 100 int gw16012_quit(void);
 101
 102 int gw16012_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 103
 104 jtag_interface_t gw16012_interface =
 105 {
 106         .name = "gw16012",
 107
 108         .execute_queue = gw16012_execute_queue,
 109
 110         .speed = gw16012_speed,
 111         .register_commands = gw16012_register_commands,
 112         .init = gw16012_init,
 113         .quit = gw16012_quit,
 114 };
 115
 116 int gw16012_register_commands(struct command_context_s *cmd_ctx)
 117 {
 118         register_command(cmd_ctx, NULL, "parport_port", gw16012_handle_parport_port_command,
 119                                          COMMAND_CONFIG, NULL);
 120
 121         return ERROR_OK;
 122 }
 123
 124 void gw16012_data(u8 value)
 125 {
 126         value = (value & 0x7f) | gw16012_msb;
 127         gw16012_msb ^= 0x80; /* toggle MSB */
 128
 129 #ifdef _DEBUG_GW16012_IO_
 130         DEBUG("%2.2x", value);
 131 #endif
 132
 133         #if PARPORT_USE_PPDEV == 1
 134                 ioctl(device_handle, PPWDATA, &value);
 135         #else
 136                 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 137                         outb(gw16012_port, value);
 138                 #else
 139                         outb(value, gw16012_port);
 140                 #endif
 141         #endif
 142 }
 143
 144 void gw16012_control(u8 value)
 145 {
 146         if (value != gw16012_control_value)
 147         {
 148                 gw16012_control_value = value;
 149
 150 #ifdef _DEBUG_GW16012_IO_
 151                 DEBUG("%2.2x", gw16012_control_value);
 152 #endif
 153
 154                 #if PARPORT_USE_PPDEV == 1
 155                         ioctl(device_handle, PPWCONTROL, &gw16012_control_value);
 156                 #else
 157                         #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 158                                 outb(gw16012_port + 2, gw16012_control_value);
 159                         #else
 160                                 outb(gw16012_control_value, gw16012_port + 2);
 161                         #endif
 162                 #endif
 163         }
 164 }
 165
 166 void gw16012_input(u8 *value)
 167 {
 168         #if PARPORT_USE_PPDEV == 1
 169                 ioctl(device_handle, PPRSTATUS, value);
 170         #else
 171                 *value = inb(gw16012_port + 1);
 172         #endif
 173
 174 #ifdef _DEBUG_GW16012_IO_
 175         DEBUG("%2.2x", *value);
 176 #endif
 177 }
 178
 179 /* (1) assert or (0) deassert reset lines */
 180 void gw16012_reset(int trst, int srst)
 181 {
 182         DEBUG("trst: %i, srst: %i", trst, srst);
 183
 184         if (trst == 0)
 185                 gw16012_control(0x0d);
 186         else if (trst == 1)
 187                 gw16012_control(0x0c);
 188
 189         if (srst == 0)
 190                 gw16012_control(0x0a);
 191         else if (srst == 1)
 192                 gw16012_control(0x0b);
 193 }
 194
 195 int gw16012_speed(int speed)
 196 {
 197
 198         return ERROR_OK;
 199 }
 200
 201 void gw16012_end_state(state)
 202 {
 203         if (tap_move_map[state] != -1)
 204                 end_state = state;
 205         else
 206         {
 207                 ERROR("BUG: %i is not a valid end state", state);
 208                 exit(-1);
 209         }
 210 }
 211
 212 void gw16012_state_move(void)
 213 {
 214         int i=0, tms=0;
 215         u8 tms_scan = TAP_MOVE(cur_state, end_state);
 216
 217         gw16012_control(0x0); /* single-bit mode */
 218
 219         for (i = 0; i < 7; i++)
 220         {
 221                 tms = (tms_scan >> i) & 1;
 222                 gw16012_data(tms << 1); /* output next TMS bit */
 223         }
 224
 225         cur_state = end_state;
 226 }
 227
 228 void gw16012_path_move(pathmove_command_t *cmd)
 229 {
 230         int num_states = cmd->num_states;
 231         int state_count;
 232
 233         state_count = 0;
 234         while (num_states)
 235         {
 236                 gw16012_control(0x0); /* single-bit mode */
 237                 if (tap_transitions[cur_state].low == cmd->path[state_count])
 238                 {
 239                         gw16012_data(0x0); /* TCK cycle with TMS low */
 240                 }
 241                 else if (tap_transitions[cur_state].high == cmd->path[state_count])
 242                 {
 243                         gw16012_data(0x2); /* TCK cycle with TMS high */
 244                 }
 245                 else
 246                 {
 247                         ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[cmd->path[state_count]]);
 248                         exit(-1);
 249                 }
 250
 251                 cur_state = cmd->path[state_count];
 252                 state_count++;
 253                 num_states--;
 254         }
 255
 256         end_state = cur_state;
 257 }
 258
 259 void gw16012_runtest(int num_cycles)
 260 {
 261         enum tap_state saved_end_state = end_state;
 262         int i;
 263
 264         /* only do a state_move when we're not already in RTI */
 265         if (cur_state != TAP_RTI)
 266         {
 267                 gw16012_end_state(TAP_RTI);
 268                 gw16012_state_move();
 269         }
 270
 271         for (i = 0; i < num_cycles; i++)
 272         {
 273                 gw16012_control(0x0); /* single-bit mode */
 274                 gw16012_data(0x0); /* TMS cycle with TMS low */
 275         }
 276
 277         gw16012_end_state(saved_end_state);
 278         if (cur_state != end_state)
 279                 gw16012_state_move();
 280 }
 281
 282 void gw16012_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 283 {
 284         int bits_left = scan_size;
 285         int bit_count = 0;
 286         enum tap_state saved_end_state = end_state;
 287         u8 scan_out, scan_in;
 288
 289         /* only if we're not already in the correct Shift state */
 290         if (!((!ir_scan && (cur_state == TAP_SD)) || (ir_scan && (cur_state == TAP_SI))))
 291         {
 292                 if (ir_scan)
 293                         gw16012_end_state(TAP_SI);
 294                 else
 295                         gw16012_end_state(TAP_SD);
 296
 297                 gw16012_state_move();
 298                 gw16012_end_state(saved_end_state);
 299         }
 300
 301         while (type == SCAN_OUT && ((bits_left - 1) > 7))
 302         {
 303                 gw16012_control(0x2); /* seven-bit mode */
 304                 scan_out = buf_get_u32(buffer, bit_count, 7);
 305                 gw16012_data(scan_out);
 306                 bit_count += 7;
 307                 bits_left -= 7;
 308         }
 309
 310         gw16012_control(0x0); /* single-bit mode */
 311         while (bits_left-- > 0)
 312         {
 313                 u8 tms = 0;
 314
 315                 scan_out = buf_get_u32(buffer, bit_count, 1);
 316
 317                 if (bits_left == 0) /* last bit */
 318                 {
 319                         if ((ir_scan && (end_state == TAP_SI))
 320                                 || (!ir_scan && (end_state == TAP_SD)))
 321                         {
 322                                 tms = 0;
 323                         }
 324                         else
 325                         {
 326                                 tms = 2;
 327                         }
 328                 }
 329
 330                 gw16012_data(scan_out | tms);
 331
 332                 if (type != SCAN_OUT)
 333                 {
 334                         gw16012_input(&scan_in);
 335                         buf_set_u32(buffer, bit_count, 1, ((scan_in & 0x08) >> 3));
 336                 }
 337
 338                 bit_count++;
 339         }
 340
 341         if (!((ir_scan && (end_state == TAP_SI)) ||
 342                 (!ir_scan && (end_state == TAP_SD))))
 343         {
 344                 gw16012_data(0x0);
 345                 if (ir_scan)
 346                         cur_state = TAP_PI;
 347                 else
 348                         cur_state = TAP_PD;
 349
 350                 if (cur_state != end_state)
 351                         gw16012_state_move();
 352         }
 353 }
 354
 355 int gw16012_execute_queue(void)
 356 {
 357         jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 358         int scan_size;
 359         enum scan_type type;
 360         u8 *buffer;
 361         int retval;
 362
 363         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 364          * that wasn't handled by a caller-provided error handler
 365          */
 366         retval = ERROR_OK;
 367
 368         while (cmd)
 369         {
 370                 switch (cmd->type)
 371                 {
 372                         case JTAG_END_STATE:
 373 #ifdef _DEBUG_JTAG_IO_
 374                                 DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
 375 #endif
 376                                 if (cmd->cmd.end_state->end_state != -1)
 377                                         gw16012_end_state(cmd->cmd.end_state->end_state);
 378                                 break;
 379                         case JTAG_RESET:
 380 #ifdef _DEBUG_JTAG_IO_
 381                                 DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 382 #endif
 383                                 if (cmd->cmd.reset->trst == 1)
 384                                 {
 385                                         cur_state = TAP_TLR;
 386                                 }
 387                                 gw16012_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 388                                 break;
 389                         case JTAG_RUNTEST:
 390 #ifdef _DEBUG_JTAG_IO_
 391                                 DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
 392 #endif
 393                                 if (cmd->cmd.runtest->end_state != -1)
 394                                         gw16012_end_state(cmd->cmd.runtest->end_state);
 395                                 gw16012_runtest(cmd->cmd.runtest->num_cycles);
 396                                 break;
 397                         case JTAG_STATEMOVE:
 398 #ifdef _DEBUG_JTAG_IO_
 399                                 DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 400 #endif
 401                                 if (cmd->cmd.statemove->end_state != -1)
 402                                         gw16012_end_state(cmd->cmd.statemove->end_state);
 403                                 gw16012_state_move();
 404                                 break;
 405                         case JTAG_PATHMOVE:
 406 #ifdef _DEBUG_JTAG_IO_
 407                                 DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 408 #endif
 409                                 gw16012_path_move(cmd->cmd.pathmove);
 410                                 break;
 411                         case JTAG_SCAN:
 412                                 if (cmd->cmd.scan->end_state != -1)
 413                                         gw16012_end_state(cmd->cmd.scan->end_state);
 414                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 415                                 type = jtag_scan_type(cmd->cmd.scan);
 416 #ifdef _DEBUG_JTAG_IO_
 417                                 DEBUG("%s scan (%i) %i bit end in %i", (cmd->cmd.scan->ir_scan) ? "ir" : "dr",
 418                                         type, scan_size, cmd->cmd.scan->end_state);
 419 #endif
 420                                 gw16012_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 421                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 422                                         retval = ERROR_JTAG_QUEUE_FAILED;
 423                                 if (buffer)
 424                                         free(buffer);
 425                                 break;
 426                         case JTAG_SLEEP:
 427 #ifdef _DEBUG_JTAG_IO_
 428                                 DEBUG("sleep %i", cmd->cmd.sleep->us);
 429 #endif
 430                                 jtag_sleep(cmd->cmd.sleep->us);
 431                                 break;
 432                         default:
 433                                 ERROR("BUG: unknown JTAG command type encountered");
 434                                 exit(-1);
 435                 }
 436                 cmd = cmd->next;
 437         }
 438
 439         return retval;
 440 }
 441
 442 #if PARPORT_USE_GIVEIO == 1
 443 int gw16012_get_giveio_access()
 444 {
 445     HANDLE h;
 446     OSVERSIONINFO version;
 447
 448     version.dwOSVersionInfoSize = sizeof version;
 449     if (!GetVersionEx( &version )) {
 450         errno = EINVAL;
 451         return -1;
 452     }
 453     if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 454         return 0;
 455
 456     h = CreateFile( "\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
 457     if (h == INVALID_HANDLE_VALUE) {
 458         errno = ENODEV;
 459         return -1;
 460     }
 461
 462     CloseHandle( h );
 463
 464     return 0;
 465 }
 466 #endif
 467
 468 int gw16012_init(void)
 469 {
 470 #if PARPORT_USE_PPDEV == 1
 471         char buffer[256];
 472         int i = 0;
 473 #endif
 474         u8 status_port;
 475
 476 #if PARPORT_USE_PPDEV == 1
 477         if (device_handle>0)
 478         {
 479                 ERROR("device is already opened");
 480                 return ERROR_JTAG_INIT_FAILED;
 481         }
 482
 483 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 484         DEBUG("opening /dev/ppi%d...", gw16012_port);
 485
 486         snprintf(buffer, 256, "/dev/ppi%d", gw16012_port);
 487         device_handle = open(buffer, O_WRONLY);
 488 #else
 489         DEBUG("opening /dev/parport%d...", gw16012_port);
 490
 491         snprintf(buffer, 256, "/dev/parport%d", gw16012_port);
 492         device_handle = open(buffer, O_WRONLY);
 493 #endif
 494         if (device_handle<0)
 495         {
 496                 ERROR("cannot open device. check it exists and that user read and write rights are set");
 497                 return ERROR_JTAG_INIT_FAILED;
 498         }
 499
 500         DEBUG("...open");
 501
 502 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 503         i=ioctl(device_handle, PPCLAIM);
 504         if (i<0)
 505         {
 506                 ERROR("cannot claim device");
 507                 return ERROR_JTAG_INIT_FAILED;
 508         }
 509
 510         i = PARPORT_MODE_COMPAT;
 511         i= ioctl(device_handle, PPSETMODE, & i);
 512         if (i<0)
 513         {
 514                 ERROR(" cannot set compatible mode to device");
 515                 return ERROR_JTAG_INIT_FAILED;
 516         }
 517
 518         i = IEEE1284_MODE_COMPAT;
 519         i = ioctl(device_handle, PPNEGOT, & i);
 520         if (i<0)
 521         {
 522                 ERROR("cannot set compatible 1284 mode to device");
 523                 return ERROR_JTAG_INIT_FAILED;
 524         }
 525 #endif
 526 #else
 527         if (gw16012_port == 0)
 528         {
 529                 gw16012_port = 0x378;
 530                 WARNING("No gw16012 port specified, using default '0x378' (LPT1)");
 531         }
 532
 533         DEBUG("requesting privileges for parallel port 0x%lx...", gw16012_port);
 534 #if PARPORT_USE_GIVEIO == 1
 535         if (gw16012_get_giveio_access() != 0)
 536 #else /* PARPORT_USE_GIVEIO */
 537         if (ioperm(gw16012_port, 3, 1) != 0)
 538 #endif /* PARPORT_USE_GIVEIO */
 539         {
 540                 ERROR("missing privileges for direct i/o");
 541                 return ERROR_JTAG_INIT_FAILED;
 542         }
 543         DEBUG("...privileges granted");
 544
 545         /* make sure parallel port is in right mode (clear tristate and interrupt */
 546 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 547         outb(gw16012_port + 2, 0x0);
 548 #else
 549         outb(0x0, gw16012_port + 2);
 550 #endif
 551 #endif /* PARPORT_USE_PPDEV */
 552
 553         gw16012_input(&status_port);
 554         gw16012_msb = (status_port & 0x80) ^ 0x80;
 555
 556         gw16012_speed(jtag_speed);
 557         gw16012_reset(0, 0);
 558
 559         return ERROR_OK;
 560 }
 561
 562 int gw16012_quit(void)
 563 {
 564
 565         return ERROR_OK;
 566 }
 567
 568 int gw16012_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 569 {
 570         if (argc == 0)
 571                 return ERROR_OK;
 572
 573         /* only if the port wasn't overwritten by cmdline */
 574         if (gw16012_port == 0)
 575                 gw16012_port = strtoul(args[0], NULL, 0);
 576
 577         return ERROR_OK;
 578 }