git.sur5r.net Git - openocd/blob - src/jtag/drivers/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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  19  ***************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include <jtag/interface.h>
  26 #include <jtag/commands.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 <machine/sysarch.h>
  37 #include <machine/cpufunc.h>
  38 #define ioperm(startport, length, enable) \
  39         386_set_ioperm((startport), (length), (enable))
  40
  41 #else
  42
  43 #endif /* __FreeBSD__, __FreeBSD_kernel__ */
  44
  45 #if PARPORT_USE_PPDEV == 1
  46 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  47 #include <dev/ppbus/ppi.h>
  48 #include <dev/ppbus/ppbconf.h>
  49 #define PPRSTATUS       PPIGSTATUS
  50 #define PPWDATA         PPISDATA
  51 #else
  52 #include <linux/parport.h>
  53 #include <linux/ppdev.h>
  54 #endif
  55 #include <fcntl.h>
  56 #include <sys/ioctl.h>
  57 #else /* not PARPORT_USE_PPDEV */
  58 #ifndef _WIN32
  59 #include <sys/io.h>
  60 #endif
  61 #endif
  62
  63 #if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1
  64 #include <windows.h>
  65 #endif
  66
  67 /* configuration */
  68 uint16_t gw16012_port;
  69
  70 /* interface variables
  71  */
  72 static uint8_t gw16012_msb;
  73 static uint8_t gw16012_control_value;
  74
  75 #if PARPORT_USE_PPDEV == 1
  76 static int device_handle;
  77 #endif
  78
  79 static void gw16012_data(uint8_t value)
  80 {
  81         value = (value & 0x7f) | gw16012_msb;
  82         gw16012_msb ^= 0x80; /* toggle MSB */
  83
  84 #ifdef _DEBUG_GW16012_IO_
  85         LOG_DEBUG("%2.2x", value);
  86 #endif
  87
  88         #if PARPORT_USE_PPDEV == 1
  89                 ioctl(device_handle, PPWDATA, &value);
  90         #else
  91                 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  92                         outb(gw16012_port, value);
  93                 #else
  94                         outb(value, gw16012_port);
  95                 #endif
  96         #endif
  97 }
  98
  99 static void gw16012_control(uint8_t value)
 100 {
 101         if (value != gw16012_control_value) {
 102                 gw16012_control_value = value;
 103
 104 #ifdef _DEBUG_GW16012_IO_
 105                 LOG_DEBUG("%2.2x", gw16012_control_value);
 106 #endif
 107
 108                 #if PARPORT_USE_PPDEV == 1
 109                         ioctl(device_handle, PPWCONTROL, &gw16012_control_value);
 110                 #else
 111                         #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 112                                 outb(gw16012_port + 2, gw16012_control_value);
 113                         #else
 114                                 outb(gw16012_control_value, gw16012_port + 2);
 115                         #endif
 116                 #endif
 117         }
 118 }
 119
 120 static void gw16012_input(uint8_t *value)
 121 {
 122         #if PARPORT_USE_PPDEV == 1
 123                 ioctl(device_handle, PPRSTATUS, value);
 124         #else
 125                 *value = inb(gw16012_port + 1);
 126         #endif
 127
 128 #ifdef _DEBUG_GW16012_IO_
 129         LOG_DEBUG("%2.2x", *value);
 130 #endif
 131 }
 132
 133 /* (1) assert or (0) deassert reset lines */
 134 static void gw16012_reset(int trst, int srst)
 135 {
 136         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 137
 138         if (trst == 0)
 139                 gw16012_control(0x0d);
 140         else if (trst == 1)
 141                 gw16012_control(0x0c);
 142
 143         if (srst == 0)
 144                 gw16012_control(0x0a);
 145         else if (srst == 1)
 146                 gw16012_control(0x0b);
 147 }
 148
 149 static void gw16012_end_state(tap_state_t state)
 150 {
 151         if (tap_is_state_stable(state))
 152                 tap_set_end_state(state);
 153         else {
 154                 LOG_ERROR("BUG: %i is not a valid end state", state);
 155                 exit(-1);
 156         }
 157 }
 158
 159 static void gw16012_state_move(void)
 160 {
 161         int i = 0, tms = 0;
 162         uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 163         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 164
 165         gw16012_control(0x0); /* single-bit mode */
 166
 167         for (i = 0; i < tms_count; i++) {
 168                 tms = (tms_scan >> i) & 1;
 169                 gw16012_data(tms << 1); /* output next TMS bit */
 170         }
 171
 172         tap_set_state(tap_get_end_state());
 173 }
 174
 175 static void gw16012_path_move(struct pathmove_command *cmd)
 176 {
 177         int num_states = cmd->num_states;
 178         int state_count;
 179
 180         state_count = 0;
 181         while (num_states) {
 182                 gw16012_control(0x0); /* single-bit mode */
 183                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 184                         gw16012_data(0x0); /* TCK cycle with TMS low */
 185                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 186                         gw16012_data(0x2); /* TCK cycle with TMS high */
 187                 else {
 188                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
 189                                         tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 190                         exit(-1);
 191                 }
 192
 193                 tap_set_state(cmd->path[state_count]);
 194                 state_count++;
 195                 num_states--;
 196         }
 197
 198         tap_set_end_state(tap_get_state());
 199 }
 200
 201 static void gw16012_runtest(int num_cycles)
 202 {
 203         tap_state_t saved_end_state = tap_get_end_state();
 204         int i;
 205
 206         /* only do a state_move when we're not already in IDLE */
 207         if (tap_get_state() != TAP_IDLE) {
 208                 gw16012_end_state(TAP_IDLE);
 209                 gw16012_state_move();
 210         }
 211
 212         for (i = 0; i < num_cycles; i++) {
 213                 gw16012_control(0x0); /* single-bit mode */
 214                 gw16012_data(0x0); /* TMS cycle with TMS low */
 215         }
 216
 217         gw16012_end_state(saved_end_state);
 218         if (tap_get_state() != tap_get_end_state())
 219                 gw16012_state_move();
 220 }
 221
 222 static void gw16012_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 223 {
 224         int bits_left = scan_size;
 225         int bit_count = 0;
 226         tap_state_t saved_end_state = tap_get_end_state();
 227         uint8_t scan_out, scan_in;
 228
 229         /* only if we're not already in the correct Shift state */
 230         if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) ||
 231                         (ir_scan && (tap_get_state() == TAP_IRSHIFT)))) {
 232                 if (ir_scan)
 233                         gw16012_end_state(TAP_IRSHIFT);
 234                 else
 235                         gw16012_end_state(TAP_DRSHIFT);
 236
 237                 gw16012_state_move();
 238                 gw16012_end_state(saved_end_state);
 239         }
 240
 241         while (type == SCAN_OUT && ((bits_left - 1) > 7)) {
 242                 gw16012_control(0x2); /* seven-bit mode */
 243                 scan_out = buf_get_u32(buffer, bit_count, 7);
 244                 gw16012_data(scan_out);
 245                 bit_count += 7;
 246                 bits_left -= 7;
 247         }
 248
 249         gw16012_control(0x0); /* single-bit mode */
 250         while (bits_left-- > 0) {
 251                 uint8_t tms = 0;
 252
 253                 scan_out = buf_get_u32(buffer, bit_count, 1);
 254
 255                 if (bits_left == 0) /* last bit */ {
 256                         if ((ir_scan && (tap_get_end_state() == TAP_IRSHIFT))
 257                                 || (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))
 258                                 tms = 0;
 259                         else
 260                                 tms = 2;
 261                 }
 262
 263                 gw16012_data(scan_out | tms);
 264
 265                 if (type != SCAN_OUT) {
 266                         gw16012_input(&scan_in);
 267                         buf_set_u32(buffer, bit_count, 1, ((scan_in & 0x08) >> 3));
 268                 }
 269
 270                 bit_count++;
 271         }
 272
 273         if (!((ir_scan && (tap_get_end_state() == TAP_IRSHIFT)) ||
 274                 (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))) {
 275                 gw16012_data(0x0);
 276                 if (ir_scan)
 277                         tap_set_state(TAP_IRPAUSE);
 278                 else
 279                         tap_set_state(TAP_DRPAUSE);
 280
 281                 if (tap_get_state() != tap_get_end_state())
 282                         gw16012_state_move();
 283         }
 284 }
 285
 286 static int gw16012_execute_queue(void)
 287 {
 288         struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
 289         int scan_size;
 290         enum scan_type type;
 291         uint8_t *buffer;
 292         int retval;
 293
 294         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 295          * that wasn't handled by a caller-provided error handler
 296          */
 297         retval = ERROR_OK;
 298
 299         while (cmd) {
 300                 switch (cmd->type) {
 301                         case JTAG_RESET:
 302 #ifdef _DEBUG_JTAG_IO_
 303                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 304 #endif
 305                                 if (cmd->cmd.reset->trst == 1)
 306                                         tap_set_state(TAP_RESET);
 307                                 gw16012_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 308                                 break;
 309                         case JTAG_RUNTEST:
 310 #ifdef _DEBUG_JTAG_IO_
 311                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles,
 312                                                 cmd->cmd.runtest->end_state);
 313 #endif
 314                                 gw16012_end_state(cmd->cmd.runtest->end_state);
 315                                 gw16012_runtest(cmd->cmd.runtest->num_cycles);
 316                                 break;
 317                         case JTAG_TLR_RESET:
 318 #ifdef _DEBUG_JTAG_IO_
 319                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 320 #endif
 321                                 gw16012_end_state(cmd->cmd.statemove->end_state);
 322                                 gw16012_state_move();
 323                                 break;
 324                         case JTAG_PATHMOVE:
 325 #ifdef _DEBUG_JTAG_IO_
 326                                 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 327                                                 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 328 #endif
 329                                 gw16012_path_move(cmd->cmd.pathmove);
 330                                 break;
 331                         case JTAG_SCAN:
 332                                 gw16012_end_state(cmd->cmd.scan->end_state);
 333                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 334                                 type = jtag_scan_type(cmd->cmd.scan);
 335 #ifdef _DEBUG_JTAG_IO_
 336                                 LOG_DEBUG("%s scan (%i) %i bit end in %i", (cmd->cmd.scan->ir_scan) ? "ir" : "dr",
 337                                         type, scan_size, cmd->cmd.scan->end_state);
 338 #endif
 339                                 gw16012_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 340                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 341                                         retval = ERROR_JTAG_QUEUE_FAILED;
 342                                 if (buffer)
 343                                         free(buffer);
 344                                 break;
 345                         case JTAG_SLEEP:
 346 #ifdef _DEBUG_JTAG_IO_
 347                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 348 #endif
 349                                 jtag_sleep(cmd->cmd.sleep->us);
 350                                 break;
 351                         default:
 352                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 353                                 exit(-1);
 354                 }
 355                 cmd = cmd->next;
 356         }
 357
 358         return retval;
 359 }
 360
 361 #if PARPORT_USE_GIVEIO == 1
 362 static int gw16012_get_giveio_access(void)
 363 {
 364         HANDLE h;
 365         OSVERSIONINFO version;
 366
 367         version.dwOSVersionInfoSize = sizeof version;
 368         if (!GetVersionEx(&version)) {
 369                 errno = EINVAL;
 370                 return -1;
 371         }
 372         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 373                 return 0;
 374
 375         h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING,
 376                         FILE_ATTRIBUTE_NORMAL, NULL);
 377         if (h == INVALID_HANDLE_VALUE) {
 378                 errno = ENODEV;
 379                 return -1;
 380         }
 381
 382         CloseHandle(h);
 383
 384         return 0;
 385 }
 386 #endif
 387
 388 #if PARPORT_USE_PPDEV == 1
 389
 390 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 391
 392 #define GW16012_PPDEV_NAME      "ppi"
 393
 394 static int gw16012_init_ioctls(void)
 395 {
 396         int temp = 0;
 397         temp = ioctl(device_handle, PPCLAIM);
 398         if (temp < 0) {
 399                 LOG_ERROR("cannot claim device");
 400                 return ERROR_JTAG_INIT_FAILED;
 401         }
 402
 403         temp = PARPORT_MODE_COMPAT;
 404         temp = ioctl(device_handle, PPSETMODE, &temp);
 405         if (temp < 0) {
 406                 LOG_ERROR(" cannot set compatible mode to device");
 407                 return ERROR_JTAG_INIT_FAILED;
 408         }
 409
 410         temp = IEEE1284_MODE_COMPAT;
 411         temp = ioctl(device_handle, PPNEGOT, &temp);
 412         if (temp < 0) {
 413                 LOG_ERROR("cannot set compatible 1284 mode to device");
 414                 return ERROR_JTAG_INIT_FAILED;
 415         }
 416         return ERROR_OK;
 417 }
 418 #else
 419
 420 #define GW16012_PPDEV_NAME      "parport"
 421
 422 static int gw16012_init_ioctls(void)
 423 {
 424         return ERROR_OK;
 425 }
 426
 427 #endif /* defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */
 428
 429 static int gw16012_init_device(void)
 430 {
 431         const char *device_name = GW16012_PPDEV_NAME;
 432         char buffer[256];
 433
 434         if (device_handle > 0) {
 435                 LOG_ERROR("device is already opened");
 436                 return ERROR_JTAG_INIT_FAILED;
 437         }
 438
 439         snprintf(buffer, 256, "/dev/%s%d", device_name, gw16012_port);
 440         LOG_DEBUG("opening %s...", buffer);
 441
 442         device_handle = open(buffer, O_WRONLY);
 443         if (device_handle < 0) {
 444                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 445                 return ERROR_JTAG_INIT_FAILED;
 446         }
 447
 448         LOG_DEBUG("...open");
 449
 450         if (gw16012_init_ioctls() != ERROR_OK)
 451                 return ERROR_JTAG_INIT_FAILED;
 452
 453         return ERROR_OK;
 454 }
 455
 456 #else /* PARPORT_USE_PPDEV */
 457
 458 static int gw16012_init_device(void)
 459 {
 460         if (gw16012_port == 0) {
 461                 gw16012_port = 0x378;
 462                 LOG_WARNING("No gw16012 port specified, using default '0x378' (LPT1)");
 463         }
 464
 465         LOG_DEBUG("requesting privileges for parallel port 0x%lx...", (long unsigned)(gw16012_port));
 466 #if PARPORT_USE_GIVEIO == 1
 467         if (gw16012_get_giveio_access() != 0) {
 468 #else /* PARPORT_USE_GIVEIO */
 469         if (ioperm(gw16012_port, 3, 1) != 0) {
 470 #endif /* PARPORT_USE_GIVEIO */
 471                 LOG_ERROR("missing privileges for direct i/o");
 472                 return ERROR_JTAG_INIT_FAILED;
 473         }
 474         LOG_DEBUG("...privileges granted");
 475
 476         /* make sure parallel port is in right mode (clear tristate and interrupt */
 477 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 478         outb(gw16012_port + 2, 0x0);
 479 #else
 480         outb(0x0, gw16012_port + 2);
 481 #endif
 482         return ERROR_OK;
 483 }
 484
 485 #endif /* PARPORT_USE_PPDEV */
 486
 487 static int gw16012_init(void)
 488 {
 489         uint8_t status_port;
 490
 491         if (gw16012_init_device() != ERROR_OK)
 492                 return ERROR_JTAG_INIT_FAILED;
 493
 494         gw16012_input(&status_port);
 495         gw16012_msb = (status_port & 0x80) ^ 0x80;
 496
 497         gw16012_reset(0, 0);
 498
 499         return ERROR_OK;
 500 }
 501
 502 static int gw16012_quit(void)
 503 {
 504
 505         return ERROR_OK;
 506 }
 507
 508 COMMAND_HANDLER(gw16012_handle_parport_port_command)
 509 {
 510         if (CMD_ARGC == 1) {
 511                 /* only if the port wasn't overwritten by cmdline */
 512                 if (gw16012_port == 0)
 513                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], gw16012_port);
 514                 else {
 515                         LOG_ERROR("The parport port was already configured!");
 516                         return ERROR_FAIL;
 517                 }
 518         }
 519
 520         command_print(CMD_CTX, "parport port = %u", gw16012_port);
 521
 522         return ERROR_OK;
 523 }
 524
 525 static const struct command_registration gw16012_command_handlers[] = {
 526         {
 527                 .name = "parport_port",
 528                 .handler = gw16012_handle_parport_port_command,
 529                 .mode = COMMAND_CONFIG,
 530                 .help = "Display the address of the I/O port (e.g. 0x378) "
 531                         "or the number of the '/dev/parport' device used.  "
 532                         "If a parameter is provided, first change that port.",
 533                 .usage = "[port_number]",
 534         },
 535         COMMAND_REGISTRATION_DONE
 536 };
 537
 538 struct jtag_interface gw16012_interface = {
 539         .name = "gw16012",
 540         .commands = gw16012_command_handlers,
 541
 542         .init = gw16012_init,
 543         .quit = gw16012_quit,
 544         .execute_queue = gw16012_execute_queue,
 545 };