setpci.c

   1 /*
   2  *      Linux PCI Utilities -- Manipulate PCI Configuration Registers
   3  *
   4  *      Copyright (c) 1998--2003 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <stdarg.h>
  13 #include <unistd.h>
  14
  15 #include "pciutils.h"
  16
  17 static int force;                       /* Don't complain if no devices match */
  18 static int verbose;                     /* Verbosity level */
  19 static int demo_mode;                   /* Only show */
  20
  21 static struct pci_access *pacc;
  22
  23 struct value {
  24   unsigned int value;
  25   unsigned int mask;
  26 };
  27
  28 struct op {
  29   struct op *next;
  30   struct pci_dev **dev_vector;
  31   unsigned int addr;
  32   unsigned int width;                   /* Byte width of the access */
  33   int num_values;                       /* Number of values to write; <0=read */
  34   struct value values[0];
  35 };
  36
  37 static struct op *first_op, **last_op = &first_op;
  38 static unsigned int max_values[] = { 0, 0xff, 0xffff, 0, 0xffffffff };
  39
  40 static struct pci_dev **
  41 select_devices(struct pci_filter *filt)
  42 {
  43   struct pci_dev *z, **a, **b;
  44   int cnt = 1;
  45
  46   for(z=pacc->devices; z; z=z->next)
  47     if (pci_filter_match(filt, z))
  48       cnt++;
  49   a = b = xmalloc(sizeof(struct device *) * cnt);
  50   for(z=pacc->devices; z; z=z->next)
  51     if (pci_filter_match(filt, z))
  52       *a++ = z;
  53   *a = NULL;
  54   return b;
  55 }
  56
  57 static void
  58 exec_op(struct op *op, struct pci_dev *dev)
  59 {
  60   char *formats[] = { NULL, "%02x", "%04x", NULL, "%08x" };
  61   char *mask_formats[] = { NULL, "%02x->(%02x:%02x)->%02x", "%04x->(%04x:%04x)->%04x", NULL, "%08x->(%08x:%08x)->%08x" };
  62   unsigned int x, y;
  63   int i, addr;
  64   int width = op->width;
  65
  66   if (verbose)
  67     printf("%02x:%02x.%x:%02x", dev->bus, dev->dev, dev->func, op->addr);
  68   addr = op->addr;
  69   if (op->num_values >= 0)
  70     {
  71       for(i=0; i<op->num_values; i++)
  72         {
  73           if ((op->values[i].mask & max_values[width]) == max_values[width])
  74             {
  75               x = op->values[i].value;
  76               if (verbose)
  77                 {
  78                   putchar(' ');
  79                   printf(formats[width], op->values[i].value);
  80                 }
  81             }
  82           else
  83             {
  84               switch (width)
  85                 {
  86                 case 1:
  87                   y = pci_read_byte(dev, addr);
  88                   break;
  89                 case 2:
  90                   y = pci_read_word(dev, addr);
  91                   break;
  92                 default:
  93                   y = pci_read_long(dev, addr);
  94                   break;
  95                 }
  96               x = (y & ~op->values[i].mask) | op->values[i].value;
  97               if (verbose)
  98                 {
  99                   putchar(' ');
 100                   printf(mask_formats[width], y, op->values[i].value, op->values[i].mask, x);
 101                 }
 102             }
 103           if (!demo_mode)
 104             {
 105               switch (width)
 106                 {
 107                 case 1:
 108                   pci_write_byte(dev, addr, x);
 109                   break;
 110                 case 2:
 111                   pci_write_word(dev, addr, x);
 112                   break;
 113                 default:
 114                   pci_write_long(dev, addr, x);
 115                   break;
 116                 }
 117             }
 118           addr += width;
 119         }
 120       if (verbose)
 121         putchar('\n');
 122     }
 123   else
 124     {
 125       if (verbose)
 126         printf(" = ");
 127       if (!demo_mode)
 128         {
 129           switch (width)
 130             {
 131             case 1:
 132               x = pci_read_byte(dev, addr);
 133               break;
 134             case 2:
 135               x = pci_read_word(dev, addr);
 136               break;
 137             default:
 138               x = pci_read_long(dev, addr);
 139               break;
 140             }
 141           printf(formats[width], x);
 142         }
 143       else
 144         putchar('?');
 145       putchar('\n');
 146     }
 147 }
 148
 149 static void
 150 execute(struct op *op)
 151 {
 152   struct pci_dev **vec = NULL;
 153   struct pci_dev **pdev, *dev;
 154   struct op *oops;
 155
 156   while (op)
 157     {
 158       pdev = vec = op->dev_vector;
 159       while (dev = *pdev++)
 160         for(oops=op; oops && oops->dev_vector == vec; oops=oops->next)
 161           exec_op(oops, dev);
 162       while (op && op->dev_vector == vec)
 163         op = op->next;
 164     }
 165 }
 166
 167 static void
 168 scan_ops(struct op *op)
 169 {
 170   while (op)
 171     {
 172       if (op->num_values >= 0)
 173         pacc->writeable = 1;
 174       op = op->next;
 175     }
 176 }
 177
 178 struct reg_name {
 179   int offset;
 180   int width;
 181   const char *name;
 182 };
 183
 184 static const struct reg_name pci_reg_names[] = {
 185   { 0x00, 2, "VENDOR_ID", },
 186   { 0x02, 2, "DEVICE_ID", },
 187   { 0x04, 2, "COMMAND", },
 188   { 0x06, 2, "STATUS", },
 189   { 0x08, 1, "REVISION", },
 190   { 0x09, 1, "CLASS_PROG", },
 191   { 0x0a, 2, "CLASS_DEVICE", },
 192   { 0x0c, 1, "CACHE_LINE_SIZE", },
 193   { 0x0d, 1, "LATENCY_TIMER", },
 194   { 0x0e, 1, "HEADER_TYPE", },
 195   { 0x0f, 1, "BIST", },
 196   { 0x10, 4, "BASE_ADDRESS_0", },
 197   { 0x14, 4, "BASE_ADDRESS_1", },
 198   { 0x18, 4, "BASE_ADDRESS_2", },
 199   { 0x1c, 4, "BASE_ADDRESS_3", },
 200   { 0x20, 4, "BASE_ADDRESS_4", },
 201   { 0x24, 4, "BASE_ADDRESS_5", },
 202   { 0x28, 4, "CARDBUS_CIS", },
 203   { 0x2c, 4, "SUBSYSTEM_VENDOR_ID", },
 204   { 0x2e, 2, "SUBSYSTEM_ID", },
 205   { 0x30, 4, "ROM_ADDRESS", },
 206   { 0x3c, 1, "INTERRUPT_LINE", },
 207   { 0x3d, 1, "INTERRUPT_PIN", },
 208   { 0x3e, 1, "MIN_GNT", },
 209   { 0x3f, 1, "MAX_LAT", },
 210   { 0x18, 1, "PRIMARY_BUS", },
 211   { 0x19, 1, "SECONDARY_BUS", },
 212   { 0x1a, 1, "SUBORDINATE_BUS", },
 213   { 0x1b, 1, "SEC_LATENCY_TIMER", },
 214   { 0x1c, 1, "IO_BASE", },
 215   { 0x1d, 1, "IO_LIMIT", },
 216   { 0x1e, 2, "SEC_STATUS", },
 217   { 0x20, 2, "MEMORY_BASE", },
 218   { 0x22, 2, "MEMORY_LIMIT", },
 219   { 0x24, 2, "PREF_MEMORY_BASE", },
 220   { 0x26, 2, "PREF_MEMORY_LIMIT", },
 221   { 0x28, 4, "PREF_BASE_UPPER32", },
 222   { 0x2c, 4, "PREF_LIMIT_UPPER32", },
 223   { 0x30, 2, "IO_BASE_UPPER16", },
 224   { 0x32, 2, "IO_LIMIT_UPPER16", },
 225   { 0x38, 4, "BRIDGE_ROM_ADDRESS", },
 226   { 0x3e, 2, "BRIDGE_CONTROL", },
 227   { 0x10, 4, "CB_CARDBUS_BASE", },
 228   { 0x14, 2, "CB_CAPABILITIES", },
 229   { 0x16, 2, "CB_SEC_STATUS", },
 230   { 0x18, 1, "CB_BUS_NUMBER", },
 231   { 0x19, 1, "CB_CARDBUS_NUMBER", },
 232   { 0x1a, 1, "CB_SUBORDINATE_BUS", },
 233   { 0x1b, 1, "CB_CARDBUS_LATENCY", },
 234   { 0x1c, 4, "CB_MEMORY_BASE_0", },
 235   { 0x20, 4, "CB_MEMORY_LIMIT_0", },
 236   { 0x24, 4, "CB_MEMORY_BASE_1", },
 237   { 0x28, 4, "CB_MEMORY_LIMIT_1", },
 238   { 0x2c, 2, "CB_IO_BASE_0", },
 239   { 0x2e, 2, "CB_IO_BASE_0_HI", },
 240   { 0x30, 2, "CB_IO_LIMIT_0", },
 241   { 0x32, 2, "CB_IO_LIMIT_0_HI", },
 242   { 0x34, 2, "CB_IO_BASE_1", },
 243   { 0x36, 2, "CB_IO_BASE_1_HI", },
 244   { 0x38, 2, "CB_IO_LIMIT_1", },
 245   { 0x3a, 2, "CB_IO_LIMIT_1_HI", },
 246   { 0x40, 2, "CB_SUBSYSTEM_VENDOR_ID", },
 247   { 0x42, 2, "CB_SUBSYSTEM_ID", },
 248   { 0x44, 4, "CB_LEGACY_MODE_BASE", },
 249   { 0x00, 0, NULL }
 250 };
 251
 252 static void NONRET
 253 usage(void)
 254 {
 255   fprintf(stderr,
 256 "Usage: setpci [<options>] (<device>+ <reg>[=<values>]*)*\n\
 257 -f\t\tDon't complain if there's nothing to do\n\
 258 -v\t\tBe verbose\n\
 259 -D\t\tList changes, don't commit them\n"
 260 GENERIC_HELP
 261 "<device>:\t-s [[<bus>]:][<slot>][.[<func>]]\n"
 262 "\t|\t-d [<vendor>]:[<device>]\n"
 263 "<reg>:\t\t<number>[.(B|W|L)]\n"
 264 "     |\t\t<name>\n"
 265 "<values>:\t<value>[,<value>...]\n"
 266 "<value>:\t<hex>\n"
 267 "       |\t<hex>:<mask>\n");
 268   exit(1);
 269 }
 270
 271 int
 272 main(int argc, char **argv)
 273 {
 274   enum { STATE_INIT, STATE_GOT_FILTER, STATE_GOT_OP } state = STATE_INIT;
 275   struct pci_filter filter;
 276   struct pci_dev **selected_devices = NULL;
 277   char *opts = GENERIC_OPTIONS ;
 278
 279   if (argc == 2 && !strcmp(argv[1], "--version"))
 280     {
 281       puts("setpci version " PCIUTILS_VERSION);
 282       return 0;
 283     }
 284   argc--;
 285   argv++;
 286
 287   pacc = pci_alloc();
 288   pacc->error = die;
 289
 290   while (argc && argv[0][0] == '-')
 291     {
 292       char *c = argv[0]+1;
 293       char *d = c;
 294       char *e;
 295       while (*c)
 296         switch (*c)
 297           {
 298           case 'v':
 299             verbose++;
 300             c++;
 301             break;
 302           case 'f':
 303             force++;
 304             c++;
 305             break;
 306           case 'D':
 307             demo_mode++;
 308             c++;
 309             break;
 310           case 0:
 311             break;
 312           default:
 313             if (e = strchr(opts, *c))
 314               {
 315                 char *arg;
 316                 c++;
 317                 if (e[1] == ':')
 318                   {
 319                     if (*c)
 320                       arg = c;
 321                     else if (argc > 1)
 322                       {
 323                         arg = argv[1];
 324                         argc--; argv++;
 325                       }
 326                     else
 327                       usage();
 328                     c = "";
 329                   }
 330                 else
 331                   arg = NULL;
 332                 if (!parse_generic_option(*e, pacc, arg))
 333                   usage();
 334               }
 335             else
 336               {
 337                 if (c != d)
 338                   usage();
 339                 goto next;
 340               }
 341           }
 342       argc--;
 343       argv++;
 344     }
 345 next:
 346
 347   pci_init(pacc);
 348   pci_scan_bus(pacc);
 349
 350   while (argc)
 351     {
 352       char *c = argv[0];
 353       char *d, *e, *f;
 354       int n, i;
 355       struct op *op;
 356       unsigned long ll;
 357       unsigned int lim;
 358
 359       if (*c == '-')
 360         {
 361           if (!c[1] || !strchr("sd", c[1]))
 362             usage();
 363           if (c[2])
 364             d = (c[2] == '=') ? c+3 : c+2;
 365           else if (argc > 1)
 366             {
 367               argc--;
 368               argv++;
 369               d = argv[0];
 370             }
 371           else
 372             usage();
 373           if (state != STATE_GOT_FILTER)
 374             {
 375               pci_filter_init(pacc, &filter);
 376               state = STATE_GOT_FILTER;
 377             }
 378           switch (c[1])
 379             {
 380             case 's':
 381               if (d = pci_filter_parse_slot(&filter, d))
 382                 die("-s: %s", d);
 383               break;
 384             case 'd':
 385               if (d = pci_filter_parse_id(&filter, d))
 386                 die("-d: %s", d);
 387               break;
 388             default:
 389               usage();
 390             }
 391         }
 392       else if (state == STATE_INIT)
 393         usage();
 394       else
 395         {
 396           if (state == STATE_GOT_FILTER)
 397             selected_devices = select_devices(&filter);
 398           if (!selected_devices[0] && !force)
 399             fprintf(stderr, "setpci: Warning: No devices selected for `%s'.\n", c);
 400           state = STATE_GOT_OP;
 401           /* look for setting of values and count how many */
 402           d = strchr(c, '=');
 403           if (d)
 404             {
 405               *d++ = 0;
 406               if (!*d)
 407                 usage();
 408               for(e=d, n=1; *e; e++)
 409                 if (*e == ',')
 410                   n++;
 411               op = xmalloc(sizeof(struct op) + n*sizeof(struct value));
 412             }
 413           else
 414             {
 415               n = -1;
 416               op = xmalloc(sizeof(struct op));
 417             }
 418           op->dev_vector = selected_devices;
 419           op->num_values = n;
 420           e = strchr(c, '.');
 421           if (e)
 422             {
 423               *e++ = 0;
 424               if (e[1])
 425                 usage();
 426               switch (*e & 0xdf)
 427                 {
 428                 case 'B':
 429                   op->width = 1; break;
 430                 case 'W':
 431                   op->width = 2; break;
 432                 case 'L':
 433                   op->width = 4; break;
 434                 default:
 435                   usage();
 436                 }
 437             }
 438           else
 439             op->width = 1;
 440           ll = strtol(c, &f, 16);
 441           if (f && *f)
 442             {
 443               const struct reg_name *r;
 444               for(r = pci_reg_names; r->name; r++)
 445                 if (!strcasecmp(r->name, c))
 446                   break;
 447               if (!r->name || e)
 448                 usage();
 449               ll = r->offset;
 450               op->width = r->width;
 451             }
 452           if (ll > 0x100 || ll + op->width*((n < 0) ? 1 : n) > 0x100)
 453             die("Register number out of range!");
 454           if (ll & (op->width - 1))
 455             die("Unaligned register address!");
 456           op->addr = ll;
 457           /* read in all the values to be set */
 458           for(i=0; i<n; i++)
 459             {
 460               e = strchr(d, ',');
 461               if (e)
 462                 *e++ = 0;
 463               ll = strtoul(d, &f, 16);
 464               lim = max_values[op->width];
 465               if (f && *f && (*f != ':') ||
 466                   (ll > lim && ll < ~0UL - lim))
 467                 {
 468                   fprintf(stderr, "bad value \"%s\"\n\n", d);
 469                   usage();
 470                 }
 471               if (f && *f == ':')
 472                 {
 473                   op->values[i].value = ll;
 474                   d = ++f;
 475                   ll = strtoul(d, &f, 16);
 476                   if (f && *f ||
 477                       (ll > lim && ll < ~0UL - lim))
 478                     {
 479                       fprintf(stderr, "bad value:mask pair \"%s\"\n\n", d);
 480                       usage();
 481                     }
 482                   op->values[i].mask = ll;
 483                   op->values[i].value &= op->values[i].mask;
 484                 }
 485               else
 486                 {
 487                   op->values[i].value = ll;
 488                   op->values[i].mask = ~0U;
 489                 }
 490               d = e;
 491             }
 492           *last_op = op;
 493           last_op = &op->next;
 494           op->next = NULL;
 495         }
 496       argc--;
 497       argv++;
 498     }
 499   if (state == STATE_INIT)
 500     usage();
 501
 502   scan_ops(first_op);
 503   execute(first_op);
 504
 505   return 0;
 506 }