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, see <http://www.gnu.org/licenses/>. *
  20  ***************************************************************************/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include <jtag/interface.h>
  27 #include "bitbang.h"
  28
  29 /* -ino: 060521-1036 */
  30 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  31 #include <machine/sysarch.h>
  32 #include <machine/cpufunc.h>
  33 #define ioperm(startport, length, enable)\
  34         i386_set_ioperm((startport), (length), (enable))
  35 #endif /* __FreeBSD__ */
  36
  37 #if PARPORT_USE_PPDEV == 1
  38 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  39 #include <dev/ppbus/ppi.h>
  40 #include <dev/ppbus/ppbconf.h>
  41 #define PPRSTATUS       PPIGSTATUS
  42 #define PPWDATA         PPISDATA
  43 #else
  44 #include <linux/parport.h>
  45 #include <linux/ppdev.h>
  46 #endif
  47 #include <sys/ioctl.h>
  48 #else /* not PARPORT_USE_PPDEV */
  49 #ifndef _WIN32
  50 #include <sys/io.h>
  51 #endif
  52 #endif
  53
  54 #if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1
  55 #include <windows.h>
  56 #endif
  57
  58 /* parallel port cable description
  59  */
  60 struct cable {
  61         const char *name;
  62         uint8_t TDO_MASK;       /* status port bit containing current TDO value */
  63         uint8_t TRST_MASK;      /* data port bit for TRST */
  64         uint8_t TMS_MASK;       /* data port bit for TMS */
  65         uint8_t TCK_MASK;       /* data port bit for TCK */
  66         uint8_t TDI_MASK;       /* data port bit for TDI */
  67         uint8_t SRST_MASK;      /* data port bit for SRST */
  68         uint8_t OUTPUT_INVERT;  /* data port bits that should be inverted */
  69         uint8_t INPUT_INVERT;   /* status port that should be inverted */
  70         uint8_t PORT_INIT;      /* initialize data port with this value */
  71         uint8_t PORT_EXIT;      /* de-initialize data port with this value */
  72         uint8_t LED_MASK;       /* data port bit for LED */
  73 };
  74
  75 static const struct cable cables[] = {
  76         /* name                         tdo   trst  tms   tck   tdi   srst  o_inv i_inv init  exit  led */
  77         { "wiggler",                    0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80, 0x80, 0x00 },
  78         { "wiggler2",                   0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80, 0x00, 0x20 },
  79         { "wiggler_ntrst_inverted",     0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x11, 0x80, 0x80, 0x80, 0x00 },
  80         { "old_amt_wiggler",            0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x11, 0x80, 0x80, 0x80, 0x00 },
  81         { "arm-jtag",                   0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x01, 0x80, 0x80, 0x80, 0x00 },
  82         { "chameleon",                  0x80, 0x00, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 },
  83         { "dlc5",                               0x10, 0x00, 0x04, 0x02, 0x01, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00 },
  84         { "triton",                             0x80, 0x08, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 },
  85         { "lattice",                    0x40, 0x10, 0x04, 0x02, 0x01, 0x08, 0x00, 0x00, 0x18, 0x18, 0x00 },
  86         { "flashlink",                  0x20, 0x10, 0x02, 0x01, 0x04, 0x20, 0x30, 0x20, 0x00, 0x00, 0x00 },
  87 /* Altium Universal JTAG cable. Set the cable to Xilinx Mode and wire to target as follows:
  88         HARD TCK - Target TCK
  89         HARD TMS - Target TMS
  90         HARD TDI - Target TDI
  91         HARD TDO - Target TDO
  92         SOFT TCK - Target TRST
  93         SOFT TDI - Target SRST
  94 */
  95         { "altium",                     0x10, 0x20, 0x04, 0x02, 0x01, 0x80, 0x00, 0x00, 0x10, 0x00, 0x08 },
  96         { "aspo",                       0x10, 0x01, 0x04, 0x08, 0x02, 0x10, 0x17, 0x00, 0x17, 0x17, 0x00 },
  97         { NULL,                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
  98 };
  99
 100 /* configuration */
 101 static char *parport_cable;
 102 static uint16_t parport_port;
 103 static bool parport_exit;
 104 static uint32_t parport_toggling_time_ns = 1000;
 105 static int wait_states;
 106
 107 /* interface variables
 108  */
 109 static const struct cable *cable;
 110 static uint8_t dataport_value;
 111
 112 #if PARPORT_USE_PPDEV == 1
 113 static int device_handle;
 114 #else
 115 static unsigned long dataport;
 116 static unsigned long statusport;
 117 #endif
 118
 119 static bb_value_t parport_read(void)
 120 {
 121         int data = 0;
 122
 123 #if PARPORT_USE_PPDEV == 1
 124         ioctl(device_handle, PPRSTATUS, &data);
 125 #else
 126         data = inb(statusport);
 127 #endif
 128
 129         if ((data ^ cable->INPUT_INVERT) & cable->TDO_MASK)
 130                 return BB_HIGH;
 131         else
 132                 return BB_LOW;
 133 }
 134
 135 static inline void parport_write_data(void)
 136 {
 137         uint8_t output;
 138         output = dataport_value ^ cable->OUTPUT_INVERT;
 139
 140 #if PARPORT_USE_PPDEV == 1
 141         ioctl(device_handle, PPWDATA, &output);
 142 #else
 143 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 144         outb(dataport, output);
 145 #else
 146         outb(output, dataport);
 147 #endif
 148 #endif
 149 }
 150
 151 static int parport_write(int tck, int tms, int tdi)
 152 {
 153         int i = wait_states + 1;
 154
 155         if (tck)
 156                 dataport_value |= cable->TCK_MASK;
 157         else
 158                 dataport_value &= ~cable->TCK_MASK;
 159
 160         if (tms)
 161                 dataport_value |= cable->TMS_MASK;
 162         else
 163                 dataport_value &= ~cable->TMS_MASK;
 164
 165         if (tdi)
 166                 dataport_value |= cable->TDI_MASK;
 167         else
 168                 dataport_value &= ~cable->TDI_MASK;
 169
 170         while (i-- > 0)
 171                 parport_write_data();
 172
 173         return ERROR_OK;
 174 }
 175
 176 /* (1) assert or (0) deassert reset lines */
 177 static int 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         return ERROR_OK;
 194 }
 195
 196 /* turn LED on parport adapter on (1) or off (0) */
 197 static int parport_led(int on)
 198 {
 199         if (on)
 200                 dataport_value |= cable->LED_MASK;
 201         else
 202                 dataport_value &= ~cable->LED_MASK;
 203
 204         parport_write_data();
 205
 206         return ERROR_OK;
 207 }
 208
 209 static int parport_speed(int speed)
 210 {
 211         wait_states = speed;
 212         return ERROR_OK;
 213 }
 214
 215 static int parport_khz(int khz, int *jtag_speed)
 216 {
 217         if (khz == 0) {
 218                 LOG_DEBUG("RCLK not supported");
 219                 return ERROR_FAIL;
 220         }
 221
 222         *jtag_speed = 499999 / (khz * parport_toggling_time_ns);
 223         return ERROR_OK;
 224 }
 225
 226 static int parport_speed_div(int speed, int *khz)
 227 {
 228         uint32_t denominator = (speed + 1) * parport_toggling_time_ns;
 229
 230         *khz = (499999 + denominator) / denominator;
 231         return ERROR_OK;
 232 }
 233
 234 #if PARPORT_USE_GIVEIO == 1
 235 static int parport_get_giveio_access(void)
 236 {
 237         HANDLE h;
 238         OSVERSIONINFO version;
 239
 240         version.dwOSVersionInfoSize = sizeof version;
 241         if (!GetVersionEx(&version)) {
 242                 errno = EINVAL;
 243                 return -1;
 244         }
 245         if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
 246                 return 0;
 247
 248         h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 249         if (h == INVALID_HANDLE_VALUE) {
 250                 errno = ENODEV;
 251                 return -1;
 252         }
 253
 254         CloseHandle(h);
 255
 256         return 0;
 257 }
 258 #endif
 259
 260 static struct bitbang_interface parport_bitbang = {
 261                 .read = &parport_read,
 262                 .write = &parport_write,
 263                 .reset = &parport_reset,
 264                 .blink = &parport_led,
 265         };
 266
 267 static int parport_init(void)
 268 {
 269         const struct cable *cur_cable;
 270 #if PARPORT_USE_PPDEV == 1
 271         char buffer[256];
 272 #endif
 273
 274         cur_cable = cables;
 275
 276         if (parport_cable == NULL) {
 277                 parport_cable = strdup("wiggler");
 278                 LOG_WARNING("No parport cable specified, using default 'wiggler'");
 279         }
 280
 281         while (cur_cable->name) {
 282                 if (strcmp(cur_cable->name, parport_cable) == 0) {
 283                         cable = cur_cable;
 284                         break;
 285                 }
 286                 cur_cable++;
 287         }
 288
 289         if (!cable) {
 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                 LOG_ERROR("device is already opened");
 299                 return ERROR_JTAG_INIT_FAILED;
 300         }
 301
 302 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 303         LOG_DEBUG("opening /dev/ppi%d...", parport_port);
 304
 305         snprintf(buffer, 256, "/dev/ppi%d", parport_port);
 306         device_handle = open(buffer, O_WRONLY);
 307 #else /* not __FreeBSD__, __FreeBSD_kernel__ */
 308         LOG_DEBUG("opening /dev/parport%d...", parport_port);
 309
 310         snprintf(buffer, 256, "/dev/parport%d", parport_port);
 311         device_handle = open(buffer, O_WRONLY);
 312 #endif /* __FreeBSD__, __FreeBSD_kernel__ */
 313
 314         if (device_handle < 0) {
 315                 int err = errno;
 316                 LOG_ERROR("cannot open device. check it exists and that user read and write rights are set. errno=%d", err);
 317                 return ERROR_JTAG_INIT_FAILED;
 318         }
 319
 320         LOG_DEBUG("...open");
 321
 322 #if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
 323         int i = ioctl(device_handle, PPCLAIM);
 324
 325         if (i < 0) {
 326                 LOG_ERROR("cannot claim device");
 327                 return ERROR_JTAG_INIT_FAILED;
 328         }
 329
 330         i = PARPORT_MODE_COMPAT;
 331         i = ioctl(device_handle, PPSETMODE, &i);
 332         if (i < 0) {
 333                 LOG_ERROR(" cannot set compatible mode to device");
 334                 return ERROR_JTAG_INIT_FAILED;
 335         }
 336
 337         i = IEEE1284_MODE_COMPAT;
 338         i = ioctl(device_handle, PPNEGOT, &i);
 339         if (i < 0) {
 340                 LOG_ERROR("cannot set compatible 1284 mode to device");
 341                 return ERROR_JTAG_INIT_FAILED;
 342         }
 343 #endif /* not __FreeBSD__, __FreeBSD_kernel__ */
 344
 345 #else /* not PARPORT_USE_PPDEV */
 346         if (parport_port == 0) {
 347                 parport_port = 0x378;
 348                 LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
 349         }
 350
 351         dataport = parport_port;
 352         statusport = parport_port + 1;
 353
 354         LOG_DEBUG("requesting privileges for parallel port 0x%lx...", dataport);
 355 #if PARPORT_USE_GIVEIO == 1
 356         if (parport_get_giveio_access() != 0) {
 357 #else /* PARPORT_USE_GIVEIO */
 358         if (ioperm(dataport, 3, 1) != 0) {
 359 #endif /* PARPORT_USE_GIVEIO */
 360                 LOG_ERROR("missing privileges for direct i/o");
 361                 return ERROR_JTAG_INIT_FAILED;
 362         }
 363         LOG_DEBUG("...privileges granted");
 364
 365         /* make sure parallel port is in right mode (clear tristate and interrupt */
 366         #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 367                 outb(parport_port + 2, 0x0);
 368         #else
 369                 outb(0x0, parport_port + 2);
 370         #endif
 371
 372 #endif /* PARPORT_USE_PPDEV */
 373
 374         if (parport_reset(0, 0) != ERROR_OK)
 375                 return ERROR_FAIL;
 376         if (parport_write(0, 0, 0) != ERROR_OK)
 377                 return ERROR_FAIL;
 378         if (parport_led(1) != ERROR_OK)
 379                 return ERROR_FAIL;
 380
 381         bitbang_interface = &parport_bitbang;
 382
 383         return ERROR_OK;
 384 }
 385
 386 static int parport_quit(void)
 387 {
 388         if (parport_led(0) != ERROR_OK)
 389                 return ERROR_FAIL;
 390
 391         if (parport_exit) {
 392                 dataport_value = cable->PORT_EXIT;
 393                 parport_write_data();
 394         }
 395
 396         if (parport_cable) {
 397                 free(parport_cable);
 398                 parport_cable = NULL;
 399         }
 400
 401         return ERROR_OK;
 402 }
 403
 404 COMMAND_HANDLER(parport_handle_parport_port_command)
 405 {
 406         if (CMD_ARGC == 1) {
 407                 /* only if the port wasn't overwritten by cmdline */
 408                 if (parport_port == 0)
 409                         COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], parport_port);
 410                 else {
 411                         LOG_ERROR("The parport port was already configured!");
 412                         return ERROR_FAIL;
 413                 }
 414         }
 415
 416         command_print(CMD_CTX, "parport port = 0x%" PRIx16 "", parport_port);
 417
 418         return ERROR_OK;
 419 }
 420
 421 COMMAND_HANDLER(parport_handle_parport_cable_command)
 422 {
 423         if (CMD_ARGC == 0)
 424                 return ERROR_OK;
 425
 426         /* only if the cable name wasn't overwritten by cmdline */
 427         if (parport_cable == 0) {
 428                 /* REVISIT first verify that it's listed in cables[] ... */
 429                 parport_cable = malloc(strlen(CMD_ARGV[0]) + sizeof(char));
 430                 strcpy(parport_cable, CMD_ARGV[0]);
 431         }
 432
 433         /* REVISIT it's probably worth returning the current value ... */
 434
 435         return ERROR_OK;
 436 }
 437
 438 COMMAND_HANDLER(parport_handle_write_on_exit_command)
 439 {
 440         if (CMD_ARGC != 1)
 441                 return ERROR_COMMAND_SYNTAX_ERROR;
 442
 443         COMMAND_PARSE_ON_OFF(CMD_ARGV[0], parport_exit);
 444
 445         return ERROR_OK;
 446 }
 447
 448 COMMAND_HANDLER(parport_handle_parport_toggling_time_command)
 449 {
 450         if (CMD_ARGC == 1) {
 451                 uint32_t ns;
 452                 int retval = parse_u32(CMD_ARGV[0], &ns);
 453
 454                 if (ERROR_OK != retval)
 455                         return retval;
 456
 457                 if (ns == 0) {
 458                         LOG_ERROR("0 ns is not a valid parport toggling time");
 459                         return ERROR_FAIL;
 460                 }
 461
 462                 parport_toggling_time_ns = ns;
 463                 retval = jtag_get_speed(&wait_states);
 464                 if (retval != ERROR_OK) {
 465                         /* if jtag_get_speed fails then the clock_mode
 466                          * has not been configured, this happens if parport_toggling_time is
 467                          * called before the adapter speed is set */
 468                         LOG_INFO("no parport speed set - defaulting to zero wait states");
 469                         wait_states = 0;
 470                 }
 471         }
 472
 473         command_print(CMD_CTX, "parport toggling time = %" PRIu32 " ns",
 474                         parport_toggling_time_ns);
 475
 476         return ERROR_OK;
 477 }
 478
 479 static const struct command_registration parport_command_handlers[] = {
 480         {
 481                 .name = "parport_port",
 482                 .handler = parport_handle_parport_port_command,
 483                 .mode = COMMAND_CONFIG,
 484                 .help = "Display the address of the I/O port (e.g. 0x378) "
 485                         "or the number of the '/dev/parport' device used.  "
 486                         "If a parameter is provided, first change that port.",
 487                 .usage = "[port_number]",
 488         },
 489         {
 490                 .name = "parport_cable",
 491                 .handler = parport_handle_parport_cable_command,
 492                 .mode = COMMAND_CONFIG,
 493                 .help = "Set the layout of the parallel port cable "
 494                         "used to connect to the target.",
 495                 /* REVISIT there's no way to list layouts we know ... */
 496                 .usage = "[layout]",
 497         },
 498         {
 499                 .name = "parport_write_on_exit",
 500                 .handler = parport_handle_write_on_exit_command,
 501                 .mode = COMMAND_CONFIG,
 502                 .help = "Configure the parallel driver to write "
 503                         "a known value to the parallel interface on exit.",
 504                 .usage = "('on'|'off')",
 505         },
 506         {
 507                 .name = "parport_toggling_time",
 508                 .handler = parport_handle_parport_toggling_time_command,
 509                 .mode = COMMAND_CONFIG,
 510                 .help = "Displays or assigns how many nanoseconds it "
 511                         "takes for the hardware to toggle TCK.",
 512                 .usage = "[nanoseconds]",
 513         },
 514         COMMAND_REGISTRATION_DONE
 515 };
 516
 517 struct jtag_interface parport_interface = {
 518         .name = "parport",
 519         .supported = DEBUG_CAP_TMS_SEQ,
 520         .commands = parport_command_handlers,
 521
 522         .init = parport_init,
 523         .quit = parport_quit,
 524         .khz = parport_khz,
 525         .speed_div = parport_speed_div,
 526         .speed = parport_speed,
 527         .execute_queue = bitbang_execute_queue,
 528 };