setpci.c

   1 /*
   2  *      The 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       switch (width)
 128         {
 129         case 1:
 130           x = pci_read_byte(dev, addr);
 131           break;
 132         case 2:
 133           x = pci_read_word(dev, addr);
 134           break;
 135         default:
 136           x = pci_read_long(dev, addr);
 137           break;
 138         }
 139       printf(formats[width], x);
 140       putchar('\n');
 141     }
 142 }
 143
 144 static void
 145 execute(struct op *op)
 146 {
 147   struct pci_dev **vec = NULL;
 148   struct pci_dev **pdev, *dev;
 149   struct op *oops;
 150
 151   while (op)
 152     {
 153       pdev = vec = op->dev_vector;
 154       while (dev = *pdev++)
 155         for(oops=op; oops && oops->dev_vector == vec; oops=oops->next)
 156           exec_op(oops, dev);
 157       while (op && op->dev_vector == vec)
 158         op = op->next;
 159     }
 160 }
 161
 162 static void
 163 scan_ops(struct op *op)
 164 {
 165   while (op)
 166     {
 167       if (op->num_values >= 0)
 168         pacc->writeable = 1;
 169       op = op->next;
 170     }
 171 }
 172
 173 struct reg_name {
 174   unsigned int offset;
 175   unsigned int width;
 176   const char *name;
 177 };
 178
 179 static const struct reg_name pci_reg_names[] = {
 180   { 0x00, 2, "VENDOR_ID", },
 181   { 0x02, 2, "DEVICE_ID", },
 182   { 0x04, 2, "COMMAND", },
 183   { 0x06, 2, "STATUS", },
 184   { 0x08, 1, "REVISION", },
 185   { 0x09, 1, "CLASS_PROG", },
 186   { 0x0a, 2, "CLASS_DEVICE", },
 187   { 0x0c, 1, "CACHE_LINE_SIZE", },
 188   { 0x0d, 1, "LATENCY_TIMER", },
 189   { 0x0e, 1, "HEADER_TYPE", },
 190   { 0x0f, 1, "BIST", },
 191   { 0x10, 4, "BASE_ADDRESS_0", },
 192   { 0x14, 4, "BASE_ADDRESS_1", },
 193   { 0x18, 4, "BASE_ADDRESS_2", },
 194   { 0x1c, 4, "BASE_ADDRESS_3", },
 195   { 0x20, 4, "BASE_ADDRESS_4", },
 196   { 0x24, 4, "BASE_ADDRESS_5", },
 197   { 0x28, 4, "CARDBUS_CIS", },
 198   { 0x2c, 4, "SUBSYSTEM_VENDOR_ID", },
 199   { 0x2e, 2, "SUBSYSTEM_ID", },
 200   { 0x30, 4, "ROM_ADDRESS", },
 201   { 0x3c, 1, "INTERRUPT_LINE", },
 202   { 0x3d, 1, "INTERRUPT_PIN", },
 203   { 0x3e, 1, "MIN_GNT", },
 204   { 0x3f, 1, "MAX_LAT", },
 205   { 0x18, 1, "PRIMARY_BUS", },
 206   { 0x19, 1, "SECONDARY_BUS", },
 207   { 0x1a, 1, "SUBORDINATE_BUS", },
 208   { 0x1b, 1, "SEC_LATENCY_TIMER", },
 209   { 0x1c, 1, "IO_BASE", },
 210   { 0x1d, 1, "IO_LIMIT", },
 211   { 0x1e, 2, "SEC_STATUS", },
 212   { 0x20, 2, "MEMORY_BASE", },
 213   { 0x22, 2, "MEMORY_LIMIT", },
 214   { 0x24, 2, "PREF_MEMORY_BASE", },
 215   { 0x26, 2, "PREF_MEMORY_LIMIT", },
 216   { 0x28, 4, "PREF_BASE_UPPER32", },
 217   { 0x2c, 4, "PREF_LIMIT_UPPER32", },
 218   { 0x30, 2, "IO_BASE_UPPER16", },
 219   { 0x32, 2, "IO_LIMIT_UPPER16", },
 220   { 0x38, 4, "BRIDGE_ROM_ADDRESS", },
 221   { 0x3e, 2, "BRIDGE_CONTROL", },
 222   { 0x10, 4, "CB_CARDBUS_BASE", },
 223   { 0x14, 2, "CB_CAPABILITIES", },
 224   { 0x16, 2, "CB_SEC_STATUS", },
 225   { 0x18, 1, "CB_BUS_NUMBER", },
 226   { 0x19, 1, "CB_CARDBUS_NUMBER", },
 227   { 0x1a, 1, "CB_SUBORDINATE_BUS", },
 228   { 0x1b, 1, "CB_CARDBUS_LATENCY", },
 229   { 0x1c, 4, "CB_MEMORY_BASE_0", },
 230   { 0x20, 4, "CB_MEMORY_LIMIT_0", },
 231   { 0x24, 4, "CB_MEMORY_BASE_1", },
 232   { 0x28, 4, "CB_MEMORY_LIMIT_1", },
 233   { 0x2c, 2, "CB_IO_BASE_0", },
 234   { 0x2e, 2, "CB_IO_BASE_0_HI", },
 235   { 0x30, 2, "CB_IO_LIMIT_0", },
 236   { 0x32, 2, "CB_IO_LIMIT_0_HI", },
 237   { 0x34, 2, "CB_IO_BASE_1", },
 238   { 0x36, 2, "CB_IO_BASE_1_HI", },
 239   { 0x38, 2, "CB_IO_LIMIT_1", },
 240   { 0x3a, 2, "CB_IO_LIMIT_1_HI", },
 241   { 0x40, 2, "CB_SUBSYSTEM_VENDOR_ID", },
 242   { 0x42, 2, "CB_SUBSYSTEM_ID", },
 243   { 0x44, 4, "CB_LEGACY_MODE_BASE", },
 244   { 0x00, 0, NULL }
 245 };
 246
 247 static void NONRET
 248 usage(char *msg, ...)
 249 {
 250   va_list args;
 251   va_start(args, msg);
 252   if (msg)
 253     {
 254       fprintf(stderr, "setpci: ");
 255       vfprintf(stderr, msg, args);
 256       fprintf(stderr, "\n\n");
 257     }
 258   fprintf(stderr,
 259 "Usage: setpci [<options>] (<device>+ <reg>[=<values>]*)*\n\
 260 -f\t\tDon't complain if there's nothing to do\n\
 261 -v\t\tBe verbose\n\
 262 -D\t\tList changes, don't commit them\n"
 263 GENERIC_HELP
 264 "<device>:\t-s [[<bus>]:][<slot>][.[<func>]]\n"
 265 "\t|\t-d [<vendor>]:[<device>]\n"
 266 "<reg>:\t\t<number>[.(B|W|L)]\n"
 267 "     |\t\t<name>\n"
 268 "<values>:\t<value>[,<value>...]\n"
 269 "<value>:\t<hex>\n"
 270 "       |\t<hex>:<mask>\n");
 271   exit(1);
 272 }
 273
 274 int
 275 main(int argc, char **argv)
 276 {
 277   enum { STATE_INIT, STATE_GOT_FILTER, STATE_GOT_OP } state = STATE_INIT;
 278   struct pci_filter filter;
 279   struct pci_dev **selected_devices = NULL;
 280   char *opts = GENERIC_OPTIONS ;
 281
 282   if (argc == 2 && !strcmp(argv[1], "--version"))
 283     {
 284       puts("setpci version " PCIUTILS_VERSION);
 285       return 0;
 286     }
 287   argc--;
 288   argv++;
 289
 290   pacc = pci_alloc();
 291   pacc->error = die;
 292
 293   while (argc && argv[0][0] == '-')
 294     {
 295       char *c = argv[0]+1;
 296       char *d = c;
 297       char *e;
 298       while (*c)
 299         switch (*c)
 300           {
 301           case 'v':
 302             verbose++;
 303             c++;
 304             break;
 305           case 'f':
 306             force++;
 307             c++;
 308             break;
 309           case 'D':
 310             demo_mode++;
 311             c++;
 312             break;
 313           case 0:
 314             break;
 315           default:
 316             if (e = strchr(opts, *c))
 317               {
 318                 char *arg;
 319                 c++;
 320                 if (e[1] == ':')
 321                   {
 322                     if (*c)
 323                       arg = c;
 324                     else if (argc > 1)
 325                       {
 326                         arg = argv[1];
 327                         argc--; argv++;
 328                       }
 329                     else
 330                       usage(NULL);
 331                     c = "";
 332                   }
 333                 else
 334                   arg = NULL;
 335                 if (!parse_generic_option(*e, pacc, arg))
 336                   usage(NULL);
 337               }
 338             else
 339               {
 340                 if (c != d)
 341                   usage(NULL);
 342                 goto next;
 343               }
 344           }
 345       argc--;
 346       argv++;
 347     }
 348 next:
 349
 350   pci_init(pacc);
 351   pci_scan_bus(pacc);
 352
 353   while (argc)
 354     {
 355       char *c = argv[0];
 356       char *d, *e, *f;
 357       int n, i;
 358       struct op *op;
 359       unsigned long ll;
 360       unsigned int lim;
 361
 362       if (*c == '-')
 363         {
 364           if (!c[1] || !strchr("sd", c[1]))
 365             usage(NULL);
 366           if (c[2])
 367             d = (c[2] == '=') ? c+3 : c+2;
 368           else if (argc > 1)
 369             {
 370               argc--;
 371               argv++;
 372               d = argv[0];
 373             }
 374           else
 375             usage(NULL);
 376           if (state != STATE_GOT_FILTER)
 377             {
 378               pci_filter_init(pacc, &filter);
 379               state = STATE_GOT_FILTER;
 380             }
 381           switch (c[1])
 382             {
 383             case 's':
 384               if (d = pci_filter_parse_slot(&filter, d))
 385                 die("-s: %s", d);
 386               break;
 387             case 'd':
 388               if (d = pci_filter_parse_id(&filter, d))
 389                 die("-d: %s", d);
 390               break;
 391             default:
 392               usage(NULL);
 393             }
 394         }
 395       else if (state == STATE_INIT)
 396         usage(NULL);
 397       else
 398         {
 399           if (state == STATE_GOT_FILTER)
 400             selected_devices = select_devices(&filter);
 401           if (!selected_devices[0] && !force)
 402             fprintf(stderr, "setpci: Warning: No devices selected for `%s'.\n", c);
 403           state = STATE_GOT_OP;
 404           /* look for setting of values and count how many */
 405           d = strchr(c, '=');
 406           if (d)
 407             {
 408               *d++ = 0;
 409               if (!*d)
 410                 usage("Missing value");
 411               for(e=d, n=1; *e; e++)
 412                 if (*e == ',')
 413                   n++;
 414               op = xmalloc(sizeof(struct op) + n*sizeof(struct value));
 415             }
 416           else
 417             {
 418               n = -1;
 419               op = xmalloc(sizeof(struct op));
 420             }
 421           op->dev_vector = selected_devices;
 422           op->num_values = n;
 423           e = strchr(c, '.');
 424           if (e)
 425             {
 426               *e++ = 0;
 427               if (e[1])
 428                 usage("Missing width");
 429               switch (*e & 0xdf)
 430                 {
 431                 case 'B':
 432                   op->width = 1; break;
 433                 case 'W':
 434                   op->width = 2; break;
 435                 case 'L':
 436                   op->width = 4; break;
 437                 default:
 438                   usage("Invalid width \"%s\"", *e);
 439                 }
 440             }
 441           else
 442             op->width = 1;
 443           ll = strtol(c, &f, 16);
 444           if (f && *f)
 445             {
 446               const struct reg_name *r;
 447               for(r = pci_reg_names; r->name; r++)
 448                 if (!strcasecmp(r->name, c))
 449                   break;
 450               if (!r->name)
 451                 usage("Unknown register \"%s\"", c);
 452               if (e && op->width != r->width)
 453                 usage("Explicit width doesn't correspond with the named register \"%s\"", c);
 454               ll = r->offset;
 455               op->width = r->width;
 456             }
 457           if (ll > 0x100 || ll + op->width*((n < 0) ? 1 : n) > 0x100)
 458             die("Register number out of range!");
 459           if (ll & (op->width - 1))
 460             die("Unaligned register address!");
 461           op->addr = ll;
 462           /* read in all the values to be set */
 463           for(i=0; i<n; i++)
 464             {
 465               e = strchr(d, ',');
 466               if (e)
 467                 *e++ = 0;
 468               ll = strtoul(d, &f, 16);
 469               lim = max_values[op->width];
 470               if (f && *f && *f != ':')
 471                 usage("Invalid value \"%s\"", d);
 472               if (ll > lim && ll < ~0UL - lim)
 473                 usage("Value \"%s\" is out of range", d);
 474               op->values[i].value = ll;
 475               if (f && *f == ':')
 476                 {
 477                   d = ++f;
 478                   ll = strtoul(d, &f, 16);
 479                   if (f && *f)
 480                     usage("Invalid mask \"%s\"", d);
 481                   if (ll > lim && ll < ~0UL - lim)
 482                     usage("Mask \"%s\" is out of range", d);
 483                   op->values[i].mask = ll;
 484                   op->values[i].value &= ll;
 485                 }
 486               else
 487                 op->values[i].mask = ~0U;
 488               d = e;
 489             }
 490           *last_op = op;
 491           last_op = &op->next;
 492           op->next = NULL;
 493         }
 494       argc--;
 495       argv++;
 496     }
 497   if (state == STATE_INIT)
 498     usage("No operation specified");
 499
 500   scan_ops(first_op);
 501   execute(first_op);
 502
 503   return 0;
 504 }