src/jtag/drivers/parport.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <jtag/interface.h>
  28 #include "bitbang.h"
  29
  30 /* -ino: 060521-1036 */
  31 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  32 #include <machine/sysarch.h>
  33 #include <machine/cpufunc.h>
  34 #define ioperm(startport,length,enable)\
  35   i386_set_ioperm((startport), (length), (enable))
  36 #endif /* __FreeBSD__ */
  37
  38 #if PARPORT_USE_PPDEV == 1
  39 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  40 #include <dev/ppbus/ppi.h>
  41 #include <dev/ppbus/ppbconf.h>
  42 #define PPRSTATUS       PPIGSTATUS
  43 #define PPWDATA         PPISDATA
  44 #else
  45 #include <linux/parport.h>
  46 #include <linux/ppdev.h>
  47 #endif
  48 #include <sys/ioctl.h>
  49 #else /* not PARPORT_USE_PPDEV */
  50 #ifndef _WIN32
  51 #include <sys/io.h>
  52 #endif
  53 #endif
  54
  55 #if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1
  56 #include <windows.h>
  57 #endif
  58
  59
  60 /* parallel port cable description
  61  */
  62 struct cable {
  63         char* name;
  64         uint8_t TDO_MASK;       /* status port bit containing current TDO value */
  65         uint8_t TRST_MASK;      /* data port bit for TRST */
  66         uint8_t TMS_MASK;       /* data port bit for TMS */
  67         uint8_t TCK_MASK;       /* data port bit for TCK */
  68         uint8_t TDI_MASK;       /* data port bit for TDI */
  69         uint8_t SRST_MASK;      /* data port bit for SRST */
  70         uint8_t OUTPUT_INVERT;  /* data port bits that should be inverted */
  71         uint8_t INPUT_INVERT;   /* status port that should be inverted */
  72         uint8_t PORT_INIT;      /* initialize data port with this value */
  73         uint8_t PORT_EXIT;      /* de-initialize data port with this value */
  74         uint8_t LED_MASK;       /* data port bit for LED */
  75 };
  76
  77 static struct cable cables[] =
  78 {
  79         /* name                         tdo   trst  tms   tck   tdi   srst  o_inv i_inv init  exit  led */
  80         { "wiggler",                    0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80, 0x80, 0x00 },
  81         { "wiggler2",                   0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80, 0x00, 0x20 },
  82         { "wiggler_ntrst_inverted",     0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x11, 0x80, 0x80, 0x80, 0x00 },
  83         { "old_amt_wiggler",            0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x11, 0x80, 0x80, 0x80, 0x00 },
  84         { "arm-jtag",                   0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x01, 0x80, 0x80, 0x80, 0x00 },
  85         { "chameleon",                  0x80, 0x00, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 },
  86         { "dlc5",                       0x10, 0x00, 0x04, 0x02, 0x01, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00 },
  87         { "triton",                     0x80, 0x08, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 },
  88         { "lattice",                    0x40, 0x10, 0x04, 0x02, 0x01, 0x08, 0x00, 0x00, 0x18, 0x18, 0x00 },
  89         { "flashlink",                  0x20, 0x10, 0x02, 0x01, 0x04, 0x20, 0x30, 0x20, 0x00, 0x00, 0x00 },
  90 /* Altium Universal JTAG cable. Set the cable to Xilinx Mode and wire to target as follows:
  91         HARD TCK - Target TCK
  92         HARD TMS - Target TMS
  93         HARD TDI - Target TDI
  94         HARD TDO - Target TDO
  95         SOFT TCK - Target TRST
  96         SOFT TDI - Target SRST
  97 */
  98         { "altium",                     0x10, 0x20, 0x04, 0x02, 0x01, 0x80, 0x00, 0x00, 0x10, 0x00, 0x08 },
  99         { NULL,                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
 100 };
 101
 102 /* configuration */
 103 static char* parport_cable = NULL;
 104 static uint16_t parport_port;
 105 static bool parport_exit = 0;
 106 static uint32_t parport_toggling_time_ns = 1000;
 107 static int wait_states;
 108
 109 /* interface variables
 110  */
 111 static struct cable* cable;
 112 static uint8_t dataport_value = 0x0;
 113
 114 #if PARPORT_USE_PPDEV == 1
 115 static int device_handle;
 116 #else
 117 static unsigned long dataport;
 118 static unsigned long statusport;
 119 #endif
 120
 121 static int parport_read(void)
 122 {
 123         int data = 0;
 124
 125 #if PARPORT_USE_PPDEV == 1
 126         ioctl(device_handle, PPRSTATUS, & data);
 127 #else
 128         data = inb(statusport);
 129 #endif
 130
 131         if ((data ^ cable->INPUT_INVERT) & cable->TDO_MASK)
 132                 return 1;
 133         else
 134                 return 0;
 135 }
 136
 137 static __inline__ void parport_write_data(void)
 138 {
 139         uint8_t output;
 140         output = dataport_value ^ cable->OUTPUT_INVERT;
 141
 142 #if PARPORT_USE_PPDEV == 1
 143         ioctl(device_handle, PPWDATA, &output);
 144 #else
 145 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 146         outb(dataport, output);
 147 #else
 148         outb(output, dataport);
 149 #endif
 150 #endif
 151 }
 152
 153 static void parport_write(int tck, int tms, int tdi)
 154 {
 155         int i = wait_states + 1;
 156
 157         if (tck)
 158                 dataport_value |= cable->TCK_MASK;
 159         else
 160                 dataport_value &= ~cable->TCK_MASK;
 161
 162         if (tms)
 163                 dataport_value |= cable->TMS_MASK;
 164         else
 165                 dataport_value &= ~cable->TMS_MASK;
 166
 167         if (tdi)
 168                 dataport_value |= cable->TDI_MASK;
 169         else
 170                 dataport_value &= ~cable->TDI_MASK;
 171
 172         while (i-- > 0)
 173                 parport_write_data();
 174 }
 175
 176 /* (1) assert or (0) deassert reset lines */
 177 static void parport_reset(int trst, int srst)
 178 {
 179         LOG_DEBUG("trst: %i, srst: %i", trst, srst);
 180
 181         if (trst == 0)
 182                 dataport_value |= cable->TRST_MASK;
 183         else if (trst == 1)
 184                 dataport_value &= ~cable->TRST_MASK;
 185
 186         if (srst == 0)
 187                 dataport_value |= cable->SRST_MASK;
 188         else if (srst == 1)
 189                 dataport_value &= ~cable->SRST_MASK;
 190
 191         parport_write_data();
 192 }
 193
 194 /* turn LED on parport adapter on (1) or off (0) */
 195 static void parport_led(int on)
 196 {
 197         if (on)
 198                 dataport_value |= cable->LED_MASK;
 199         else
 200                 dataport_value &= ~cable->LED_MASK;
 201
 202         parport_write_data();
 203 }
 204
 205 static int parport_speed(int speed)
 206 {
 207         wait_states = speed;
 208         return ERROR_OK;
 209 }
 210
 211 static int parport_khz(int khz, int* jtag_speed)
 212 {
 213         if (khz == 0) {
 214                 LOG_DEBUG("RCLK not supported");
 215                 return ERROR_FAIL;
 216         }
 217
 218         *jtag_speed = 499999 / (khz * parport_toggling_time_ns);
 219         return ERROR_OK;
 220 }
 221
 222 static int parport_speed_div(int speed, int* khz)
 223 {
 224         uint32_t denominator = (speed + 1) * parport_toggling_time_ns;
 225
 226         *khz = (499999 + denominator) / denominator;
 227         return ERROR_OK;
 228 }
 229
 230 #if PARPORT_USE_GIVEIO == 1
 231 static int parport_get_giveio_access(void)
 232 {
 233         HANDLE h;
 234         OSVERSIONINFO version;
 235
 236         version.dwOSVersionInfoSize = sizeof version;
 237         if (!GetVersionEx(&version)) {
 238                 errno = EINVAL;
 239                 return -1;
 240         }
 241         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 242                 return 0;
 243
 244         h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 245         if (h == INVALID_HANDLE_VALUE) {
 246                 errno = ENODEV;
 247                 return -1;
 248         }
 249
 250         CloseHandle(h);
 251
 252         return 0;
 253 }
 254 #endif
 255
 256 static struct bitbang_interface parport_bitbang = {
 257                 .read = &parport_read,
 258                 .write = &parport_write,
 259                 .reset = &parport_reset,
 260                 .blink = &parport_led,
 261         };
 262
 263 static int parport_init(void)
 264 {
 265         struct cable *cur_cable;
 266 #if PARPORT_USE_PPDEV == 1
 267         char buffer[256];
 268 #endif
 269
 270         cur_cable = cables;
 271
 272         if ((parport_cable == NULL) || (parport_cable[0] == 0))
 273         {
 274                 parport_cable = "wiggler";
 275                 LOG_WARNING("No parport cable specified, using default 'wiggler'");
 276         }
 277
 278         while (cur_cable->name)
 279         {
 280                 if (strcmp(cur_cable->name, parport_cable) == 0)
 281                 {
 282                         cable = cur_cable;
 283                         break;
 284                 }
 285                 cur_cable++;
 286         }
 287
 288         if (!cable)
 289         {
 290                 LOG_ERROR("No matching cable found for %s", parport_cable);
 291                 return ERROR_JTAG_INIT_FAILED;
 292         }
 293
 294         dataport_value = cable->PORT_INIT;
 295
 296 #if PARPORT_USE_PPDEV == 1
 297         if (device_handle > 0)
 298         {
 299                 LOG_ERROR("device is already opened");
 300                 return ERROR_JTAG_INIT_FAILED;
 301         }
 302
 303 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 304         LOG_DEBUG("opening /dev/ppi%d...", parport_port);
 305
 306         snprintf(buffer, 256, "/dev/ppi%d", parport_port);
 307         device_handle = open(buffer, O_WRONLY);
 308 #else /* not __FreeBSD__, __FreeBSD_kernel__ */
 309         LOG_DEBUG("opening /dev/parport%d...", parport_port);
 310
 311         snprintf(buffer, 256, "/dev/parport%d", parport_port);
 312         device_handle = open(buffer, O_WRONLY);
 313 #endif /* __FreeBSD__, __FreeBSD_kernel__ */
 314
 315         if (device_handle < 0)
 316         {
 317                 int err = errno;
 318                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set. errno=%d", err);
 319                 return ERROR_JTAG_INIT_FAILED;
 320         }
 321
 322         LOG_DEBUG("...open");
 323
 324 #if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
 325         int i = ioctl(device_handle, PPCLAIM);
 326
 327         if (i < 0)
 328         {
 329                 LOG_ERROR("cannot claim device");
 330                 return ERROR_JTAG_INIT_FAILED;
 331         }
 332
 333         i = PARPORT_MODE_COMPAT;
 334         i= ioctl(device_handle, PPSETMODE, & i);
 335         if (i < 0)
 336         {
 337                 LOG_ERROR(" cannot set compatible mode to device");
 338                 return ERROR_JTAG_INIT_FAILED;
 339         }
 340
 341         i = IEEE1284_MODE_COMPAT;
 342         i = ioctl(device_handle, PPNEGOT, & i);
 343         if (i < 0)
 344         {
 345                 LOG_ERROR("cannot set compatible 1284 mode to device");
 346                 return ERROR_JTAG_INIT_FAILED;
 347         }
 348 #endif /* not __FreeBSD__, __FreeBSD_kernel__ */
 349
 350 #else /* not PARPORT_USE_PPDEV */
 351         if (parport_port == 0)
 352         {
 353                 parport_port = 0x378;
 354                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 355         }
 356
 357         dataport = parport_port;
 358         statusport = parport_port + 1;
 359
 360         LOG_DEBUG("requesting privileges for parallel port 0x%lx...", dataport);
 361 #if PARPORT_USE_GIVEIO == 1
 362         if (parport_get_giveio_access() != 0)
 363 #else /* PARPORT_USE_GIVEIO */
 364         if (ioperm(dataport, 3, 1) != 0)
 365 #endif /* PARPORT_USE_GIVEIO */
 366         {
 367                 LOG_ERROR("missing privileges for direct i/o");
 368                 return ERROR_JTAG_INIT_FAILED;
 369         }
 370         LOG_DEBUG("...privileges granted");
 371
 372         /* make sure parallel port is in right mode (clear tristate and interrupt */
 373         #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 374                 outb(parport_port + 2, 0x0);
 375         #else
 376                 outb(0x0, parport_port + 2);
 377         #endif
 378
 379 #endif /* PARPORT_USE_PPDEV */
 380
 381         parport_reset(0, 0);
 382         parport_write(0, 0, 0);
 383         parport_led(1);
 384
 385         bitbang_interface = &parport_bitbang;
 386
 387         wait_states = jtag_get_speed();
 388
 389         return ERROR_OK;
 390 }
 391
 392 static int parport_quit(void)
 393 {
 394         parport_led(0);
 395
 396         if (parport_exit)
 397         {
 398                 dataport_value = cable->PORT_EXIT;
 399                 parport_write_data();
 400         }
 401
 402         if (parport_cable)
 403         {
 404                 free(parport_cable);
 405                 parport_cable = NULL;
 406         }
 407
 408         return ERROR_OK;
 409 }
 410
 411 COMMAND_HANDLER(parport_handle_parport_port_command)
 412 {
 413         if (CMD_ARGC == 1)
 414         {
 415                 /* only if the port wasn't overwritten by cmdline */
 416                 if (parport_port == 0)
 417                 {
 418                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], parport_port);
 419                 }
 420                 else
 421                 {
 422                         LOG_ERROR("The parport port was already configured!");
 423                         return ERROR_FAIL;
 424                 }
 425         }
 426
 427         command_print(CMD_CTX, "parport port = 0x%" PRIx16 "", parport_port);
 428
 429         return ERROR_OK;
 430 }
 431
 432 COMMAND_HANDLER(parport_handle_parport_cable_command)
 433 {
 434         if (CMD_ARGC == 0)
 435                 return ERROR_OK;
 436
 437         /* only if the cable name wasn't overwritten by cmdline */
 438         if (parport_cable == 0)
 439         {
 440                 /* REVISIT first verify that it's listed in cables[] ... */
 441                 parport_cable = malloc(strlen(CMD_ARGV[0]) + sizeof(char));
 442                 strcpy(parport_cable, CMD_ARGV[0]);
 443         }
 444
 445         /* REVISIT it's probably worth returning the current value ... */
 446
 447         return ERROR_OK;
 448 }
 449
 450 COMMAND_HANDLER(parport_handle_write_on_exit_command)
 451 {
 452         if (CMD_ARGC != 1)
 453         {
 454                 command_print(CMD_CTX, "usage: parport_write_on_exit <on | off>");
 455                 return ERROR_OK;
 456         }
 457
 458         COMMAND_PARSE_ON_OFF(CMD_ARGV[0], parport_exit);
 459
 460         return ERROR_OK;
 461 }
 462
 463 COMMAND_HANDLER(parport_handle_parport_toggling_time_command)
 464 {
 465         if (CMD_ARGC == 1) {
 466                 uint32_t ns;
 467                 int retval = parse_u32(CMD_ARGV[0], &ns);
 468
 469                 if (ERROR_OK != retval)
 470                         return retval;
 471
 472                 if (ns == 0) {
 473                         LOG_ERROR("0 ns is not a valid parport toggling time");
 474                         return ERROR_FAIL;
 475                 }
 476
 477                 parport_toggling_time_ns = ns;
 478                 wait_states = jtag_get_speed();
 479         }
 480
 481         command_print(CMD_CTX, "parport toggling time = %" PRIu32 " ns",
 482                         parport_toggling_time_ns);
 483
 484         return ERROR_OK;
 485 }
 486
 487 static const struct command_registration parport_command_handlers[] = {
 488         {
 489                 .name = "parport_port",
 490                 .handler = parport_handle_parport_port_command,
 491                 .mode = COMMAND_CONFIG,
 492                 .help = "Display the address of the I/O port (e.g. 0x378) "
 493                         "or the number of the '/dev/parport' device used.  "
 494                         "If a parameter is provided, first change that port.",
 495                 .usage = "[port_number]",
 496         },
 497         {
 498                 .name = "parport_cable",
 499                 .handler = parport_handle_parport_cable_command,
 500                 .mode = COMMAND_CONFIG,
 501                 .help = "Set the layout of the parallel port cable "
 502                         "used to connect to the target.",
 503                 /* REVISIT there's no way to list layouts we know ... */
 504                 .usage = "[layout]",
 505         },
 506         {
 507                 .name = "parport_write_on_exit",
 508                 .handler = parport_handle_write_on_exit_command,
 509                 .mode = COMMAND_CONFIG,
 510                 .help = "Configure the parallel driver to write "
 511                         "a known value to the parallel interface on exit.",
 512                 .usage = "('on'|'off')",
 513         },
 514         {
 515                 .name = "parport_toggling_time",
 516                 .handler = parport_handle_parport_toggling_time_command,
 517                 .mode = COMMAND_CONFIG,
 518                 .help = "Displays or assigns how many nanoseconds it "
 519                         "takes for the hardware to toggle TCK.",
 520                 .usage = "[nanoseconds]",
 521         },
 522         COMMAND_REGISTRATION_DONE
 523 };
 524
 525 struct jtag_interface parport_interface = {
 526         .name = "parport",
 527         .supported = DEBUG_CAP_TMS_SEQ,
 528         .commands = parport_command_handlers,
 529
 530         .init = parport_init,
 531         .quit = parport_quit,
 532         .khz = parport_khz,
 533         .speed_div = parport_speed_div,
 534         .speed = parport_speed,
 535         .execute_queue = bitbang_execute_queue,
 536 };