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, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include <jtag/interface.h>
  24 #include <jtag/commands.h>
  25
  26 #if 1
  27 #define _DEBUG_GW16012_IO_
  28 #endif
  29
  30 /* system includes */
  31 /*  -ino: 060521-1036 */
  32 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  33
  34 #include <machine/sysarch.h>
  35 #include <machine/cpufunc.h>
  36 #define ioperm(startport, length, enable) \
  37         386_set_ioperm((startport), (length), (enable))
  38
  39 #else
  40
  41 #endif /* __FreeBSD__, __FreeBSD_kernel__ */
  42
  43 #if PARPORT_USE_PPDEV == 1
  44 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  45 #include <dev/ppbus/ppi.h>
  46 #include <dev/ppbus/ppbconf.h>
  47 #define PPRSTATUS       PPIGSTATUS
  48 #define PPWDATA         PPISDATA
  49 #else
  50 #include <linux/parport.h>
  51 #include <linux/ppdev.h>
  52 #endif
  53 #include <fcntl.h>
  54 #include <sys/ioctl.h>
  55 #else /* not PARPORT_USE_PPDEV */
  56 #ifndef _WIN32
  57 #include <sys/io.h>
  58 #endif
  59 #endif
  60
  61 #if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1
  62 #include <windows.h>
  63 #endif
  64
  65 /* configuration */
  66 uint16_t gw16012_port;
  67
  68 /* interface variables
  69  */
  70 static uint8_t gw16012_msb;
  71 static uint8_t gw16012_control_value;
  72
  73 #if PARPORT_USE_PPDEV == 1
  74 static int device_handle;
  75 #endif
  76
  77 static void gw16012_data(uint8_t value)
  78 {
  79         value = (value & 0x7f) | gw16012_msb;
  80         gw16012_msb ^= 0x80; /* toggle MSB */
  81
  82 #ifdef _DEBUG_GW16012_IO_
  83         LOG_DEBUG("%2.2x", value);
  84 #endif
  85
  86         #if PARPORT_USE_PPDEV == 1
  87                 ioctl(device_handle, PPWDATA, &value);
  88         #else
  89                 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  90                         outb(gw16012_port, value);
  91                 #else
  92                         outb(value, gw16012_port);
  93                 #endif
  94         #endif
  95 }
  96
  97 static void gw16012_control(uint8_t value)
  98 {
  99         if (value != gw16012_control_value) {
 100                 gw16012_control_value = value;
 101
 102 #ifdef _DEBUG_GW16012_IO_
 103                 LOG_DEBUG("%2.2x", gw16012_control_value);
 104 #endif
 105
 106                 #if PARPORT_USE_PPDEV == 1
 107                         ioctl(device_handle, PPWCONTROL, &gw16012_control_value);
 108                 #else
 109                         #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 110                                 outb(gw16012_port + 2, gw16012_control_value);
 111                         #else
 112                                 outb(gw16012_control_value, gw16012_port + 2);
 113                         #endif
 114                 #endif
 115         }
 116 }
 117
 118 static void gw16012_input(uint8_t *value)
 119 {
 120         #if PARPORT_USE_PPDEV == 1
 121                 ioctl(device_handle, PPRSTATUS, value);
 122         #else
 123                 *value = inb(gw16012_port + 1);
 124         #endif
 125
 126 #ifdef _DEBUG_GW16012_IO_
 127         LOG_DEBUG("%2.2x", *value);
 128 #endif
 129 }
 130
 131 /* (1) assert or (0) deassert reset lines */
 132 static void gw16012_reset(int trst, int srst)
 133 {
 134         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 135
 136         if (trst == 0)
 137                 gw16012_control(0x0d);
 138         else if (trst == 1)
 139                 gw16012_control(0x0c);
 140
 141         if (srst == 0)
 142                 gw16012_control(0x0a);
 143         else if (srst == 1)
 144                 gw16012_control(0x0b);
 145 }
 146
 147 static void gw16012_end_state(tap_state_t state)
 148 {
 149         if (tap_is_state_stable(state))
 150                 tap_set_end_state(state);
 151         else {
 152                 LOG_ERROR("BUG: %i is not a valid end state", state);
 153                 exit(-1);
 154         }
 155 }
 156
 157 static void gw16012_state_move(void)
 158 {
 159         int i = 0, tms = 0;
 160         uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
 161         int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
 162
 163         gw16012_control(0x0); /* single-bit mode */
 164
 165         for (i = 0; i < tms_count; i++) {
 166                 tms = (tms_scan >> i) & 1;
 167                 gw16012_data(tms << 1); /* output next TMS bit */
 168         }
 169
 170         tap_set_state(tap_get_end_state());
 171 }
 172
 173 static void gw16012_path_move(struct pathmove_command *cmd)
 174 {
 175         int num_states = cmd->num_states;
 176         int state_count;
 177
 178         state_count = 0;
 179         while (num_states) {
 180                 gw16012_control(0x0); /* single-bit mode */
 181                 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
 182                         gw16012_data(0x0); /* TCK cycle with TMS low */
 183                 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
 184                         gw16012_data(0x2); /* TCK cycle with TMS high */
 185                 else {
 186                         LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
 187                                         tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
 188                         exit(-1);
 189                 }
 190
 191                 tap_set_state(cmd->path[state_count]);
 192                 state_count++;
 193                 num_states--;
 194         }
 195
 196         tap_set_end_state(tap_get_state());
 197 }
 198
 199 static void gw16012_runtest(int num_cycles)
 200 {
 201         tap_state_t saved_end_state = tap_get_end_state();
 202         int i;
 203
 204         /* only do a state_move when we're not already in IDLE */
 205         if (tap_get_state() != TAP_IDLE) {
 206                 gw16012_end_state(TAP_IDLE);
 207                 gw16012_state_move();
 208         }
 209
 210         for (i = 0; i < num_cycles; i++) {
 211                 gw16012_control(0x0); /* single-bit mode */
 212                 gw16012_data(0x0); /* TMS cycle with TMS low */
 213         }
 214
 215         gw16012_end_state(saved_end_state);
 216         if (tap_get_state() != tap_get_end_state())
 217                 gw16012_state_move();
 218 }
 219
 220 static void gw16012_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
 221 {
 222         int bits_left = scan_size;
 223         int bit_count = 0;
 224         tap_state_t saved_end_state = tap_get_end_state();
 225         uint8_t scan_out, scan_in;
 226
 227         /* only if we're not already in the correct Shift state */
 228         if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) ||
 229                         (ir_scan && (tap_get_state() == TAP_IRSHIFT)))) {
 230                 if (ir_scan)
 231                         gw16012_end_state(TAP_IRSHIFT);
 232                 else
 233                         gw16012_end_state(TAP_DRSHIFT);
 234
 235                 gw16012_state_move();
 236                 gw16012_end_state(saved_end_state);
 237         }
 238
 239         while (type == SCAN_OUT && ((bits_left - 1) > 7)) {
 240                 gw16012_control(0x2); /* seven-bit mode */
 241                 scan_out = buf_get_u32(buffer, bit_count, 7);
 242                 gw16012_data(scan_out);
 243                 bit_count += 7;
 244                 bits_left -= 7;
 245         }
 246
 247         gw16012_control(0x0); /* single-bit mode */
 248         while (bits_left-- > 0) {
 249                 uint8_t tms = 0;
 250
 251                 scan_out = buf_get_u32(buffer, bit_count, 1);
 252
 253                 if (bits_left == 0) /* last bit */ {
 254                         if ((ir_scan && (tap_get_end_state() == TAP_IRSHIFT))
 255                                 || (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))
 256                                 tms = 0;
 257                         else
 258                                 tms = 2;
 259                 }
 260
 261                 gw16012_data(scan_out | tms);
 262
 263                 if (type != SCAN_OUT) {
 264                         gw16012_input(&scan_in);
 265                         buf_set_u32(buffer, bit_count, 1, ((scan_in & 0x08) >> 3));
 266                 }
 267
 268                 bit_count++;
 269         }
 270
 271         if (!((ir_scan && (tap_get_end_state() == TAP_IRSHIFT)) ||
 272                 (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))) {
 273                 gw16012_data(0x0);
 274                 if (ir_scan)
 275                         tap_set_state(TAP_IRPAUSE);
 276                 else
 277                         tap_set_state(TAP_DRPAUSE);
 278
 279                 if (tap_get_state() != tap_get_end_state())
 280                         gw16012_state_move();
 281         }
 282 }
 283
 284 static int gw16012_execute_queue(void)
 285 {
 286         struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
 287         int scan_size;
 288         enum scan_type type;
 289         uint8_t *buffer;
 290         int retval;
 291
 292         /* return ERROR_OK, unless a jtag_read_buffer returns a failed check
 293          * that wasn't handled by a caller-provided error handler
 294          */
 295         retval = ERROR_OK;
 296
 297         while (cmd) {
 298                 switch (cmd->type) {
 299                         case JTAG_RESET:
 300 #ifdef _DEBUG_JTAG_IO_
 301                                 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 302 #endif
 303                                 if (cmd->cmd.reset->trst == 1)
 304                                         tap_set_state(TAP_RESET);
 305                                 gw16012_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
 306                                 break;
 307                         case JTAG_RUNTEST:
 308 #ifdef _DEBUG_JTAG_IO_
 309                                 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles,
 310                                                 cmd->cmd.runtest->end_state);
 311 #endif
 312                                 gw16012_end_state(cmd->cmd.runtest->end_state);
 313                                 gw16012_runtest(cmd->cmd.runtest->num_cycles);
 314                                 break;
 315                         case JTAG_TLR_RESET:
 316 #ifdef _DEBUG_JTAG_IO_
 317                                 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
 318 #endif
 319                                 gw16012_end_state(cmd->cmd.statemove->end_state);
 320                                 gw16012_state_move();
 321                                 break;
 322                         case JTAG_PATHMOVE:
 323 #ifdef _DEBUG_JTAG_IO_
 324                                 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
 325                                                 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
 326 #endif
 327                                 gw16012_path_move(cmd->cmd.pathmove);
 328                                 break;
 329                         case JTAG_SCAN:
 330                                 gw16012_end_state(cmd->cmd.scan->end_state);
 331                                 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 332                                 type = jtag_scan_type(cmd->cmd.scan);
 333 #ifdef _DEBUG_JTAG_IO_
 334                                 LOG_DEBUG("%s scan (%i) %i bit end in %i", (cmd->cmd.scan->ir_scan) ? "ir" : "dr",
 335                                         type, scan_size, cmd->cmd.scan->end_state);
 336 #endif
 337                                 gw16012_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 338                                 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
 339                                         retval = ERROR_JTAG_QUEUE_FAILED;
 340                                 if (buffer)
 341                                         free(buffer);
 342                                 break;
 343                         case JTAG_SLEEP:
 344 #ifdef _DEBUG_JTAG_IO_
 345                                 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
 346 #endif
 347                                 jtag_sleep(cmd->cmd.sleep->us);
 348                                 break;
 349                         default:
 350                                 LOG_ERROR("BUG: unknown JTAG command type encountered");
 351                                 exit(-1);
 352                 }
 353                 cmd = cmd->next;
 354         }
 355
 356         return retval;
 357 }
 358
 359 #if PARPORT_USE_GIVEIO == 1
 360 static int gw16012_get_giveio_access(void)
 361 {
 362         HANDLE h;
 363         OSVERSIONINFO version;
 364
 365         version.dwOSVersionInfoSize = sizeof version;
 366         if (!GetVersionEx(&version)) {
 367                 errno = EINVAL;
 368                 return -1;
 369         }
 370         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 371                 return 0;
 372
 373         h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING,
 374                         FILE_ATTRIBUTE_NORMAL, NULL);
 375         if (h == INVALID_HANDLE_VALUE) {
 376                 errno = ENODEV;
 377                 return -1;
 378         }
 379
 380         CloseHandle(h);
 381
 382         return 0;
 383 }
 384 #endif
 385
 386 #if PARPORT_USE_PPDEV == 1
 387
 388 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 389
 390 #define GW16012_PPDEV_NAME      "ppi"
 391
 392 static int gw16012_init_ioctls(void)
 393 {
 394         int temp = 0;
 395         temp = ioctl(device_handle, PPCLAIM);
 396         if (temp < 0) {
 397                 LOG_ERROR("cannot claim device");
 398                 return ERROR_JTAG_INIT_FAILED;
 399         }
 400
 401         temp = PARPORT_MODE_COMPAT;
 402         temp = ioctl(device_handle, PPSETMODE, &temp);
 403         if (temp < 0) {
 404                 LOG_ERROR(" cannot set compatible mode to device");
 405                 return ERROR_JTAG_INIT_FAILED;
 406         }
 407
 408         temp = IEEE1284_MODE_COMPAT;
 409         temp = ioctl(device_handle, PPNEGOT, &temp);
 410         if (temp < 0) {
 411                 LOG_ERROR("cannot set compatible 1284 mode to device");
 412                 return ERROR_JTAG_INIT_FAILED;
 413         }
 414         return ERROR_OK;
 415 }
 416 #else
 417
 418 #define GW16012_PPDEV_NAME      "parport"
 419
 420 static int gw16012_init_ioctls(void)
 421 {
 422         return ERROR_OK;
 423 }
 424
 425 #endif /* defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */
 426
 427 static int gw16012_init_device(void)
 428 {
 429         const char *device_name = GW16012_PPDEV_NAME;
 430         char buffer[256];
 431
 432         if (device_handle > 0) {
 433                 LOG_ERROR("device is already opened");
 434                 return ERROR_JTAG_INIT_FAILED;
 435         }
 436
 437         snprintf(buffer, 256, "/dev/%s%d", device_name, gw16012_port);
 438         LOG_DEBUG("opening %s...", buffer);
 439
 440         device_handle = open(buffer, O_WRONLY);
 441         if (device_handle < 0) {
 442                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
 443                 return ERROR_JTAG_INIT_FAILED;
 444         }
 445
 446         LOG_DEBUG("...open");
 447
 448         if (gw16012_init_ioctls() != ERROR_OK)
 449                 return ERROR_JTAG_INIT_FAILED;
 450
 451         return ERROR_OK;
 452 }
 453
 454 #else /* PARPORT_USE_PPDEV */
 455
 456 static int gw16012_init_device(void)
 457 {
 458         if (gw16012_port == 0) {
 459                 gw16012_port = 0x378;
 460                 LOG_WARNING("No gw16012 port specified, using default '0x378' (LPT1)");
 461         }
 462
 463         LOG_DEBUG("requesting privileges for parallel port 0x%lx...", (long unsigned)(gw16012_port));
 464 #if PARPORT_USE_GIVEIO == 1
 465         if (gw16012_get_giveio_access() != 0) {
 466 #else /* PARPORT_USE_GIVEIO */
 467         if (ioperm(gw16012_port, 3, 1) != 0) {
 468 #endif /* PARPORT_USE_GIVEIO */
 469                 LOG_ERROR("missing privileges for direct i/o");
 470                 return ERROR_JTAG_INIT_FAILED;
 471         }
 472         LOG_DEBUG("...privileges granted");
 473
 474         /* make sure parallel port is in right mode (clear tristate and interrupt */
 475 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 476         outb(gw16012_port + 2, 0x0);
 477 #else
 478         outb(0x0, gw16012_port + 2);
 479 #endif
 480         return ERROR_OK;
 481 }
 482
 483 #endif /* PARPORT_USE_PPDEV */
 484
 485 static int gw16012_init(void)
 486 {
 487         uint8_t status_port;
 488
 489         if (gw16012_init_device() != ERROR_OK)
 490                 return ERROR_JTAG_INIT_FAILED;
 491
 492         gw16012_input(&status_port);
 493         gw16012_msb = (status_port & 0x80) ^ 0x80;
 494
 495         gw16012_reset(0, 0);
 496
 497         return ERROR_OK;
 498 }
 499
 500 static int gw16012_quit(void)
 501 {
 502
 503         return ERROR_OK;
 504 }
 505
 506 COMMAND_HANDLER(gw16012_handle_parport_port_command)
 507 {
 508         if (CMD_ARGC == 1) {
 509                 /* only if the port wasn't overwritten by cmdline */
 510                 if (gw16012_port == 0)
 511                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], gw16012_port);
 512                 else {
 513                         LOG_ERROR("The parport port was already configured!");
 514                         return ERROR_FAIL;
 515                 }
 516         }
 517
 518         command_print(CMD_CTX, "parport port = %u", gw16012_port);
 519
 520         return ERROR_OK;
 521 }
 522
 523 static const struct command_registration gw16012_command_handlers[] = {
 524         {
 525                 .name = "parport_port",
 526                 .handler = gw16012_handle_parport_port_command,
 527                 .mode = COMMAND_CONFIG,
 528                 .help = "Display the address of the I/O port (e.g. 0x378) "
 529                         "or the number of the '/dev/parport' device used.  "
 530                         "If a parameter is provided, first change that port.",
 531                 .usage = "[port_number]",
 532         },
 533         COMMAND_REGISTRATION_DONE
 534 };
 535
 536 struct jtag_interface gw16012_interface = {
 537         .name = "gw16012",
 538         .commands = gw16012_command_handlers,
 539
 540         .init = gw16012_init,
 541         .quit = gw16012_quit,
 542         .execute_queue = gw16012_execute_queue,
 543 };