1 /* Simple code to turn various tables in an ELF file into alias definitions. 2 * This deals with kernel datastructures where they should be 3 * dealt with: in the kernel source. 4 * 5 * Copyright 2002-2003 Rusty Russell, IBM Corporation 6 * 2003 Kai Germaschewski 7 * 8 * 9 * This software may be used and distributed according to the terms 10 * of the GNU General Public License, incorporated herein by reference. 11 */ 12 13 #include "modpost.h" 14 15 /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and 16 * use either stdint.h or inttypes.h for the rest. */ 17 #if KERNEL_ELFCLASS == ELFCLASS32 18 typedef Elf32_Addr kernel_ulong_t; 19 #define BITS_PER_LONG 32 20 #else 21 typedef Elf64_Addr kernel_ulong_t; 22 #define BITS_PER_LONG 64 23 #endif 24 #ifdef __sun__ 25 #include <inttypes.h> 26 #else 27 #include <stdint.h> 28 #endif 29 30 #include <ctype.h> 31 #include <stdbool.h> 32 33 typedef uint32_t __u32; 34 typedef uint16_t __u16; 35 typedef unsigned char __u8; 36 37 /* Big exception to the "don't include kernel headers into userspace, which 38 * even potentially has different endianness and word sizes, since 39 * we handle those differences explicitly below */ 40 #include "../../include/linux/mod_devicetable.h" 41 42 /* This array collects all instances that use the generic do_table */ 43 struct devtable { 44 const char *device_id; /* name of table, __mod_<name>_device_table. */ 45 unsigned long id_size; 46 void *function; 47 }; 48 49 #define ___cat(a,b) a ## b 50 #define __cat(a,b) ___cat(a,b) 51 52 /* we need some special handling for this host tool running eventually on 53 * Darwin. The Mach-O section handling is a bit different than ELF section 54 * handling. The differnces in detail are: 55 * a) we have segments which have sections 56 * b) we need a API call to get the respective section symbols */ 57 #if defined(__MACH__) 58 #include <mach-o/getsect.h> 59 60 #define INIT_SECTION(name) do { \ 61 unsigned long name ## _len; \ 62 char *__cat(pstart_,name) = getsectdata("__TEXT", \ 63 #name, &__cat(name,_len)); \ 64 char *__cat(pstop_,name) = __cat(pstart_,name) + \ 65 __cat(name, _len); \ 66 __cat(__start_,name) = (void *)__cat(pstart_,name); \ 67 __cat(__stop_,name) = (void *)__cat(pstop_,name); \ 68 } while (0) 69 #define SECTION(name) __attribute__((section("__TEXT, " #name))) 70 71 struct devtable **__start___devtable, **__stop___devtable; 72 #else 73 #define INIT_SECTION(name) /* no-op for ELF */ 74 #define SECTION(name) __attribute__((section(#name))) 75 76 /* We construct a table of pointers in an ELF section (pointers generally 77 * go unpadded by gcc). ld creates boundary syms for us. */ 78 extern struct devtable *__start___devtable[], *__stop___devtable[]; 79 #endif /* __MACH__ */ 80 81 #if __GNUC__ == 3 && __GNUC_MINOR__ < 3 82 # define __used __attribute__((__unused__)) 83 #else 84 # define __used __attribute__((__used__)) 85 #endif 86 87 /* Add a table entry. We test function type matches while we're here. */ 88 #define ADD_TO_DEVTABLE(device_id, type, function) \ 89 static struct devtable __cat(devtable,__LINE__) = { \ 90 device_id + 0*sizeof((function)((const char *)NULL, \ 91 (type *)NULL, \ 92 (char *)NULL)), \ 93 sizeof(type), (function) }; \ 94 static struct devtable *SECTION(__devtable) __used \ 95 __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__) 96 97 #define ADD(str, sep, cond, field) \ 98 do { \ 99 strcat(str, sep); \ 100 if (cond) \ 101 sprintf(str + strlen(str), \ 102 sizeof(field) == 1 ? "%02X" : \ 103 sizeof(field) == 2 ? "%04X" : \ 104 sizeof(field) == 4 ? "%08X" : "", \ 105 field); \ 106 else \ 107 sprintf(str + strlen(str), "*"); \ 108 } while(0) 109 110 /* Always end in a wildcard, for future extension */ 111 static inline void add_wildcard(char *str) 112 { 113 int len = strlen(str); 114 115 if (str[len - 1] != '*') 116 strcat(str + len, "*"); 117 } 118 119 unsigned int cross_build = 0; 120 /** 121 * Check that sizeof(device_id type) are consistent with size of section 122 * in .o file. If in-consistent then userspace and kernel does not agree 123 * on actual size which is a bug. 124 * Also verify that the final entry in the table is all zeros. 125 * Ignore both checks if build host differ from target host and size differs. 126 **/ 127 static void device_id_check(const char *modname, const char *device_id, 128 unsigned long size, unsigned long id_size, 129 void *symval) 130 { 131 int i; 132 133 if (size % id_size || size < id_size) { 134 if (cross_build != 0) 135 return; 136 fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo " 137 "of the size of section __mod_%s_device_table=%lu.\n" 138 "Fix definition of struct %s_device_id " 139 "in mod_devicetable.h\n", 140 modname, device_id, id_size, device_id, size, device_id); 141 } 142 /* Verify last one is a terminator */ 143 for (i = 0; i < id_size; i++ ) { 144 if (*(uint8_t*)(symval+size-id_size+i)) { 145 fprintf(stderr,"%s: struct %s_device_id is %lu bytes. " 146 "The last of %lu is:\n", 147 modname, device_id, id_size, size / id_size); 148 for (i = 0; i < id_size; i++ ) 149 fprintf(stderr,"0x%02x ", 150 *(uint8_t*)(symval+size-id_size+i) ); 151 fprintf(stderr,"\n"); 152 fatal("%s: struct %s_device_id is not terminated " 153 "with a NULL entry!\n", modname, device_id); 154 } 155 } 156 } 157 158 /* USB is special because the bcdDevice can be matched against a numeric range */ 159 /* Looks like "usb:vNpNdNdcNdscNdpNicNiscNipN" */ 160 static void do_usb_entry(struct usb_device_id *id, 161 unsigned int bcdDevice_initial, int bcdDevice_initial_digits, 162 unsigned char range_lo, unsigned char range_hi, 163 unsigned char max, struct module *mod) 164 { 165 char alias[500]; 166 strcpy(alias, "usb:"); 167 ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR, 168 id->idVendor); 169 ADD(alias, "p", id->match_flags&USB_DEVICE_ID_MATCH_PRODUCT, 170 id->idProduct); 171 172 strcat(alias, "d"); 173 if (bcdDevice_initial_digits) 174 sprintf(alias + strlen(alias), "%0*X", 175 bcdDevice_initial_digits, bcdDevice_initial); 176 if (range_lo == range_hi) 177 sprintf(alias + strlen(alias), "%X", range_lo); 178 else if (range_lo > 0 || range_hi < max) { 179 if (range_lo > 0x9 || range_hi < 0xA) 180 sprintf(alias + strlen(alias), 181 "[%X-%X]", 182 range_lo, 183 range_hi); 184 else { 185 sprintf(alias + strlen(alias), 186 range_lo < 0x9 ? "[%X-9" : "[%X", 187 range_lo); 188 sprintf(alias + strlen(alias), 189 range_hi > 0xA ? "a-%X]" : "%X]", 190 range_lo); 191 } 192 } 193 if (bcdDevice_initial_digits < (sizeof(id->bcdDevice_lo) * 2 - 1)) 194 strcat(alias, "*"); 195 196 ADD(alias, "dc", id->match_flags&USB_DEVICE_ID_MATCH_DEV_CLASS, 197 id->bDeviceClass); 198 ADD(alias, "dsc", 199 id->match_flags&USB_DEVICE_ID_MATCH_DEV_SUBCLASS, 200 id->bDeviceSubClass); 201 ADD(alias, "dp", 202 id->match_flags&USB_DEVICE_ID_MATCH_DEV_PROTOCOL, 203 id->bDeviceProtocol); 204 ADD(alias, "ic", 205 id->match_flags&USB_DEVICE_ID_MATCH_INT_CLASS, 206 id->bInterfaceClass); 207 ADD(alias, "isc", 208 id->match_flags&USB_DEVICE_ID_MATCH_INT_SUBCLASS, 209 id->bInterfaceSubClass); 210 ADD(alias, "ip", 211 id->match_flags&USB_DEVICE_ID_MATCH_INT_PROTOCOL, 212 id->bInterfaceProtocol); 213 214 add_wildcard(alias); 215 buf_printf(&mod->dev_table_buf, 216 "MODULE_ALIAS(\"%s\");\n", alias); 217 } 218 219 /* Handles increment/decrement of BCD formatted integers */ 220 /* Returns the previous value, so it works like i++ or i-- */ 221 static unsigned int incbcd(unsigned int *bcd, 222 int inc, 223 unsigned char max, 224 size_t chars) 225 { 226 unsigned int init = *bcd, i, j; 227 unsigned long long c, dec = 0; 228 229 /* If bcd is not in BCD format, just increment */ 230 if (max > 0x9) { 231 *bcd += inc; 232 return init; 233 } 234 235 /* Convert BCD to Decimal */ 236 for (i=0 ; i < chars ; i++) { 237 c = (*bcd >> (i << 2)) & 0xf; 238 c = c > 9 ? 9 : c; /* force to bcd just in case */ 239 for (j=0 ; j < i ; j++) 240 c = c * 10; 241 dec += c; 242 } 243 244 /* Do our increment/decrement */ 245 dec += inc; 246 *bcd = 0; 247 248 /* Convert back to BCD */ 249 for (i=0 ; i < chars ; i++) { 250 for (c=1,j=0 ; j < i ; j++) 251 c = c * 10; 252 c = (dec / c) % 10; 253 *bcd += c << (i << 2); 254 } 255 return init; 256 } 257 258 static void do_usb_entry_multi(struct usb_device_id *id, struct module *mod) 259 { 260 unsigned int devlo, devhi; 261 unsigned char chi, clo, max; 262 int ndigits; 263 264 id->match_flags = TO_NATIVE(id->match_flags); 265 id->idVendor = TO_NATIVE(id->idVendor); 266 id->idProduct = TO_NATIVE(id->idProduct); 267 268 devlo = id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO ? 269 TO_NATIVE(id->bcdDevice_lo) : 0x0U; 270 devhi = id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI ? 271 TO_NATIVE(id->bcdDevice_hi) : ~0x0U; 272 273 /* Figure out if this entry is in bcd or hex format */ 274 max = 0x9; /* Default to decimal format */ 275 for (ndigits = 0 ; ndigits < sizeof(id->bcdDevice_lo) * 2 ; ndigits++) { 276 clo = (devlo >> (ndigits << 2)) & 0xf; 277 chi = ((devhi > 0x9999 ? 0x9999 : devhi) >> (ndigits << 2)) & 0xf; 278 if (clo > max || chi > max) { 279 max = 0xf; 280 break; 281 } 282 } 283 284 /* 285 * Some modules (visor) have empty slots as placeholder for 286 * run-time specification that results in catch-all alias 287 */ 288 if (!(id->idVendor | id->idProduct | id->bDeviceClass | id->bInterfaceClass)) 289 return; 290 291 /* Convert numeric bcdDevice range into fnmatch-able pattern(s) */ 292 for (ndigits = sizeof(id->bcdDevice_lo) * 2 - 1; devlo <= devhi; ndigits--) { 293 clo = devlo & 0xf; 294 chi = devhi & 0xf; 295 if (chi > max) /* If we are in bcd mode, truncate if necessary */ 296 chi = max; 297 devlo >>= 4; 298 devhi >>= 4; 299 300 if (devlo == devhi || !ndigits) { 301 do_usb_entry(id, devlo, ndigits, clo, chi, max, mod); 302 break; 303 } 304 305 if (clo > 0x0) 306 do_usb_entry(id, 307 incbcd(&devlo, 1, max, 308 sizeof(id->bcdDevice_lo) * 2), 309 ndigits, clo, max, max, mod); 310 311 if (chi < max) 312 do_usb_entry(id, 313 incbcd(&devhi, -1, max, 314 sizeof(id->bcdDevice_lo) * 2), 315 ndigits, 0x0, chi, max, mod); 316 } 317 } 318 319 static void do_usb_table(void *symval, unsigned long size, 320 struct module *mod) 321 { 322 unsigned int i; 323 const unsigned long id_size = sizeof(struct usb_device_id); 324 325 device_id_check(mod->name, "usb", size, id_size, symval); 326 327 /* Leave last one: it's the terminator. */ 328 size -= id_size; 329 330 for (i = 0; i < size; i += id_size) 331 do_usb_entry_multi(symval + i, mod); 332 } 333 334 /* Looks like: hid:bNvNpN */ 335 static int do_hid_entry(const char *filename, 336 struct hid_device_id *id, char *alias) 337 { 338 id->bus = TO_NATIVE(id->bus); 339 id->vendor = TO_NATIVE(id->vendor); 340 id->product = TO_NATIVE(id->product); 341 342 sprintf(alias, "hid:b%04X", id->bus); 343 ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor); 344 ADD(alias, "p", id->product != HID_ANY_ID, id->product); 345 346 return 1; 347 } 348 ADD_TO_DEVTABLE("hid", struct hid_device_id, do_hid_entry); 349 350 /* Looks like: ieee1394:venNmoNspNverN */ 351 static int do_ieee1394_entry(const char *filename, 352 struct ieee1394_device_id *id, char *alias) 353 { 354 id->match_flags = TO_NATIVE(id->match_flags); 355 id->vendor_id = TO_NATIVE(id->vendor_id); 356 id->model_id = TO_NATIVE(id->model_id); 357 id->specifier_id = TO_NATIVE(id->specifier_id); 358 id->version = TO_NATIVE(id->version); 359 360 strcpy(alias, "ieee1394:"); 361 ADD(alias, "ven", id->match_flags & IEEE1394_MATCH_VENDOR_ID, 362 id->vendor_id); 363 ADD(alias, "mo", id->match_flags & IEEE1394_MATCH_MODEL_ID, 364 id->model_id); 365 ADD(alias, "sp", id->match_flags & IEEE1394_MATCH_SPECIFIER_ID, 366 id->specifier_id); 367 ADD(alias, "ver", id->match_flags & IEEE1394_MATCH_VERSION, 368 id->version); 369 370 add_wildcard(alias); 371 return 1; 372 } 373 ADD_TO_DEVTABLE("ieee1394", struct ieee1394_device_id, do_ieee1394_entry); 374 375 /* Looks like: pci:vNdNsvNsdNbcNscNiN. */ 376 static int do_pci_entry(const char *filename, 377 struct pci_device_id *id, char *alias) 378 { 379 /* Class field can be divided into these three. */ 380 unsigned char baseclass, subclass, interface, 381 baseclass_mask, subclass_mask, interface_mask; 382 383 id->vendor = TO_NATIVE(id->vendor); 384 id->device = TO_NATIVE(id->device); 385 id->subvendor = TO_NATIVE(id->subvendor); 386 id->subdevice = TO_NATIVE(id->subdevice); 387 id->class = TO_NATIVE(id->class); 388 id->class_mask = TO_NATIVE(id->class_mask); 389 390 strcpy(alias, "pci:"); 391 ADD(alias, "v", id->vendor != PCI_ANY_ID, id->vendor); 392 ADD(alias, "d", id->device != PCI_ANY_ID, id->device); 393 ADD(alias, "sv", id->subvendor != PCI_ANY_ID, id->subvendor); 394 ADD(alias, "sd", id->subdevice != PCI_ANY_ID, id->subdevice); 395 396 baseclass = (id->class) >> 16; 397 baseclass_mask = (id->class_mask) >> 16; 398 subclass = (id->class) >> 8; 399 subclass_mask = (id->class_mask) >> 8; 400 interface = id->class; 401 interface_mask = id->class_mask; 402 403 if ((baseclass_mask != 0 && baseclass_mask != 0xFF) 404 || (subclass_mask != 0 && subclass_mask != 0xFF) 405 || (interface_mask != 0 && interface_mask != 0xFF)) { 406 warn("Can't handle masks in %s:%04X\n", 407 filename, id->class_mask); 408 return 0; 409 } 410 411 ADD(alias, "bc", baseclass_mask == 0xFF, baseclass); 412 ADD(alias, "sc", subclass_mask == 0xFF, subclass); 413 ADD(alias, "i", interface_mask == 0xFF, interface); 414 add_wildcard(alias); 415 return 1; 416 } 417 ADD_TO_DEVTABLE("pci", struct pci_device_id, do_pci_entry); 418 419 /* looks like: "ccw:tNmNdtNdmN" */ 420 static int do_ccw_entry(const char *filename, 421 struct ccw_device_id *id, char *alias) 422 { 423 id->match_flags = TO_NATIVE(id->match_flags); 424 id->cu_type = TO_NATIVE(id->cu_type); 425 id->cu_model = TO_NATIVE(id->cu_model); 426 id->dev_type = TO_NATIVE(id->dev_type); 427 id->dev_model = TO_NATIVE(id->dev_model); 428 429 strcpy(alias, "ccw:"); 430 ADD(alias, "t", id->match_flags&CCW_DEVICE_ID_MATCH_CU_TYPE, 431 id->cu_type); 432 ADD(alias, "m", id->match_flags&CCW_DEVICE_ID_MATCH_CU_MODEL, 433 id->cu_model); 434 ADD(alias, "dt", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_TYPE, 435 id->dev_type); 436 ADD(alias, "dm", id->match_flags&CCW_DEVICE_ID_MATCH_DEVICE_MODEL, 437 id->dev_model); 438 add_wildcard(alias); 439 return 1; 440 } 441 ADD_TO_DEVTABLE("ccw", struct ccw_device_id, do_ccw_entry); 442 443 /* looks like: "ap:tN" */ 444 static int do_ap_entry(const char *filename, 445 struct ap_device_id *id, char *alias) 446 { 447 sprintf(alias, "ap:t%02X*", id->dev_type); 448 return 1; 449 } 450 ADD_TO_DEVTABLE("ap", struct ap_device_id, do_ap_entry); 451 452 /* looks like: "css:tN" */ 453 static int do_css_entry(const char *filename, 454 struct css_device_id *id, char *alias) 455 { 456 sprintf(alias, "css:t%01X", id->type); 457 return 1; 458 } 459 ADD_TO_DEVTABLE("css", struct css_device_id, do_css_entry); 460 461 /* Looks like: "serio:tyNprNidNexN" */ 462 static int do_serio_entry(const char *filename, 463 struct serio_device_id *id, char *alias) 464 { 465 id->type = TO_NATIVE(id->type); 466 id->proto = TO_NATIVE(id->proto); 467 id->id = TO_NATIVE(id->id); 468 id->extra = TO_NATIVE(id->extra); 469 470 strcpy(alias, "serio:"); 471 ADD(alias, "ty", id->type != SERIO_ANY, id->type); 472 ADD(alias, "pr", id->proto != SERIO_ANY, id->proto); 473 ADD(alias, "id", id->id != SERIO_ANY, id->id); 474 ADD(alias, "ex", id->extra != SERIO_ANY, id->extra); 475 476 add_wildcard(alias); 477 return 1; 478 } 479 ADD_TO_DEVTABLE("serio", struct serio_device_id, do_serio_entry); 480 481 /* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */ 482 static int do_acpi_entry(const char *filename, 483 struct acpi_device_id *id, char *alias) 484 { 485 sprintf(alias, "acpi*:%s:*", id->id); 486 return 1; 487 } 488 ADD_TO_DEVTABLE("acpi", struct acpi_device_id, do_acpi_entry); 489 490 /* looks like: "pnp:dD" */ 491 static void do_pnp_device_entry(void *symval, unsigned long size, 492 struct module *mod) 493 { 494 const unsigned long id_size = sizeof(struct pnp_device_id); 495 const unsigned int count = (size / id_size)-1; 496 const struct pnp_device_id *devs = symval; 497 unsigned int i; 498 499 device_id_check(mod->name, "pnp", size, id_size, symval); 500 501 for (i = 0; i < count; i++) { 502 const char *id = (char *)devs[i].id; 503 char acpi_id[sizeof(devs[0].id)]; 504 int j; 505 506 buf_printf(&mod->dev_table_buf, 507 "MODULE_ALIAS(\"pnp:d%s*\");\n", id); 508 509 /* fix broken pnp bus lowercasing */ 510 for (j = 0; j < sizeof(acpi_id); j++) 511 acpi_id[j] = toupper(id[j]); 512 buf_printf(&mod->dev_table_buf, 513 "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id); 514 } 515 } 516 517 /* looks like: "pnp:dD" for every device of the card */ 518 static void do_pnp_card_entries(void *symval, unsigned long size, 519 struct module *mod) 520 { 521 const unsigned long id_size = sizeof(struct pnp_card_device_id); 522 const unsigned int count = (size / id_size)-1; 523 const struct pnp_card_device_id *cards = symval; 524 unsigned int i; 525 526 device_id_check(mod->name, "pnp", size, id_size, symval); 527 528 for (i = 0; i < count; i++) { 529 unsigned int j; 530 const struct pnp_card_device_id *card = &cards[i]; 531 532 for (j = 0; j < PNP_MAX_DEVICES; j++) { 533 const char *id = (char *)card->devs[j].id; 534 int i2, j2; 535 int dup = 0; 536 537 if (!id[0]) 538 break; 539 540 /* find duplicate, already added value */ 541 for (i2 = 0; i2 < i && !dup; i2++) { 542 const struct pnp_card_device_id *card2 = &cards[i2]; 543 544 for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) { 545 const char *id2 = (char *)card2->devs[j2].id; 546 547 if (!id2[0]) 548 break; 549 550 if (!strcmp(id, id2)) { 551 dup = 1; 552 break; 553 } 554 } 555 } 556 557 /* add an individual alias for every device entry */ 558 if (!dup) { 559 char acpi_id[sizeof(card->devs[0].id)]; 560 int k; 561 562 buf_printf(&mod->dev_table_buf, 563 "MODULE_ALIAS(\"pnp:d%s*\");\n", id); 564 565 /* fix broken pnp bus lowercasing */ 566 for (k = 0; k < sizeof(acpi_id); k++) 567 acpi_id[k] = toupper(id[k]); 568 buf_printf(&mod->dev_table_buf, 569 "MODULE_ALIAS(\"acpi*:%s:*\");\n", acpi_id); 570 } 571 } 572 } 573 } 574 575 /* Looks like: pcmcia:mNcNfNfnNpfnNvaNvbNvcNvdN. */ 576 static int do_pcmcia_entry(const char *filename, 577 struct pcmcia_device_id *id, char *alias) 578 { 579 unsigned int i; 580 581 id->match_flags = TO_NATIVE(id->match_flags); 582 id->manf_id = TO_NATIVE(id->manf_id); 583 id->card_id = TO_NATIVE(id->card_id); 584 id->func_id = TO_NATIVE(id->func_id); 585 id->function = TO_NATIVE(id->function); 586 id->device_no = TO_NATIVE(id->device_no); 587 588 for (i=0; i<4; i++) { 589 id->prod_id_hash[i] = TO_NATIVE(id->prod_id_hash[i]); 590 } 591 592 strcpy(alias, "pcmcia:"); 593 ADD(alias, "m", id->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID, 594 id->manf_id); 595 ADD(alias, "c", id->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID, 596 id->card_id); 597 ADD(alias, "f", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID, 598 id->func_id); 599 ADD(alias, "fn", id->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION, 600 id->function); 601 ADD(alias, "pfn", id->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO, 602 id->device_no); 603 ADD(alias, "pa", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, id->prod_id_hash[0]); 604 ADD(alias, "pb", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, id->prod_id_hash[1]); 605 ADD(alias, "pc", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, id->prod_id_hash[2]); 606 ADD(alias, "pd", id->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, id->prod_id_hash[3]); 607 608 add_wildcard(alias); 609 return 1; 610 } 611 ADD_TO_DEVTABLE("pcmcia", struct pcmcia_device_id, do_pcmcia_entry); 612 613 static int do_of_entry (const char *filename, struct of_device_id *of, char *alias) 614 { 615 int len; 616 char *tmp; 617 len = sprintf (alias, "of:N%sT%s", 618 of->name[0] ? of->name : "*", 619 of->type[0] ? of->type : "*"); 620 621 if (of->compatible[0]) 622 sprintf (&alias[len], "%sC%s", 623 of->type[0] ? "*" : "", 624 of->compatible); 625 626 /* Replace all whitespace with underscores */ 627 for (tmp = alias; tmp && *tmp; tmp++) 628 if (isspace (*tmp)) 629 *tmp = '_'; 630 631 add_wildcard(alias); 632 return 1; 633 } 634 ADD_TO_DEVTABLE("of", struct of_device_id, do_of_entry); 635 636 static int do_vio_entry(const char *filename, struct vio_device_id *vio, 637 char *alias) 638 { 639 char *tmp; 640 641 sprintf(alias, "vio:T%sS%s", vio->type[0] ? vio->type : "*", 642 vio->compat[0] ? vio->compat : "*"); 643 644 /* Replace all whitespace with underscores */ 645 for (tmp = alias; tmp && *tmp; tmp++) 646 if (isspace (*tmp)) 647 *tmp = '_'; 648 649 add_wildcard(alias); 650 return 1; 651 } 652 ADD_TO_DEVTABLE("vio", struct vio_device_id, do_vio_entry); 653 654 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 655 656 static void do_input(char *alias, 657 kernel_ulong_t *arr, unsigned int min, unsigned int max) 658 { 659 unsigned int i; 660 661 for (i = min; i < max; i++) 662 if (arr[i / BITS_PER_LONG] & (1L << (i%BITS_PER_LONG))) 663 sprintf(alias + strlen(alias), "%X,*", i); 664 } 665 666 /* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */ 667 static int do_input_entry(const char *filename, struct input_device_id *id, 668 char *alias) 669 { 670 sprintf(alias, "input:"); 671 672 ADD(alias, "b", id->flags & INPUT_DEVICE_ID_MATCH_BUS, id->bustype); 673 ADD(alias, "v", id->flags & INPUT_DEVICE_ID_MATCH_VENDOR, id->vendor); 674 ADD(alias, "p", id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT, id->product); 675 ADD(alias, "e", id->flags & INPUT_DEVICE_ID_MATCH_VERSION, id->version); 676 677 sprintf(alias + strlen(alias), "-e*"); 678 if (id->flags & INPUT_DEVICE_ID_MATCH_EVBIT) 679 do_input(alias, id->evbit, 0, INPUT_DEVICE_ID_EV_MAX); 680 sprintf(alias + strlen(alias), "k*"); 681 if (id->flags & INPUT_DEVICE_ID_MATCH_KEYBIT) 682 do_input(alias, id->keybit, 683 INPUT_DEVICE_ID_KEY_MIN_INTERESTING, 684 INPUT_DEVICE_ID_KEY_MAX); 685 sprintf(alias + strlen(alias), "r*"); 686 if (id->flags & INPUT_DEVICE_ID_MATCH_RELBIT) 687 do_input(alias, id->relbit, 0, INPUT_DEVICE_ID_REL_MAX); 688 sprintf(alias + strlen(alias), "a*"); 689 if (id->flags & INPUT_DEVICE_ID_MATCH_ABSBIT) 690 do_input(alias, id->absbit, 0, INPUT_DEVICE_ID_ABS_MAX); 691 sprintf(alias + strlen(alias), "m*"); 692 if (id->flags & INPUT_DEVICE_ID_MATCH_MSCIT) 693 do_input(alias, id->mscbit, 0, INPUT_DEVICE_ID_MSC_MAX); 694 sprintf(alias + strlen(alias), "l*"); 695 if (id->flags & INPUT_DEVICE_ID_MATCH_LEDBIT) 696 do_input(alias, id->ledbit, 0, INPUT_DEVICE_ID_LED_MAX); 697 sprintf(alias + strlen(alias), "s*"); 698 if (id->flags & INPUT_DEVICE_ID_MATCH_SNDBIT) 699 do_input(alias, id->sndbit, 0, INPUT_DEVICE_ID_SND_MAX); 700 sprintf(alias + strlen(alias), "f*"); 701 if (id->flags & INPUT_DEVICE_ID_MATCH_FFBIT) 702 do_input(alias, id->ffbit, 0, INPUT_DEVICE_ID_FF_MAX); 703 sprintf(alias + strlen(alias), "w*"); 704 if (id->flags & INPUT_DEVICE_ID_MATCH_SWBIT) 705 do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX); 706 return 1; 707 } 708 ADD_TO_DEVTABLE("input", struct input_device_id, do_input_entry); 709 710 static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa, 711 char *alias) 712 { 713 if (eisa->sig[0]) 714 sprintf(alias, EISA_DEVICE_MODALIAS_FMT "*", eisa->sig); 715 else 716 strcat(alias, "*"); 717 return 1; 718 } 719 ADD_TO_DEVTABLE("eisa", struct eisa_device_id, do_eisa_entry); 720 721 /* Looks like: parisc:tNhvNrevNsvN */ 722 static int do_parisc_entry(const char *filename, struct parisc_device_id *id, 723 char *alias) 724 { 725 id->hw_type = TO_NATIVE(id->hw_type); 726 id->hversion = TO_NATIVE(id->hversion); 727 id->hversion_rev = TO_NATIVE(id->hversion_rev); 728 id->sversion = TO_NATIVE(id->sversion); 729 730 strcpy(alias, "parisc:"); 731 ADD(alias, "t", id->hw_type != PA_HWTYPE_ANY_ID, id->hw_type); 732 ADD(alias, "hv", id->hversion != PA_HVERSION_ANY_ID, id->hversion); 733 ADD(alias, "rev", id->hversion_rev != PA_HVERSION_REV_ANY_ID, id->hversion_rev); 734 ADD(alias, "sv", id->sversion != PA_SVERSION_ANY_ID, id->sversion); 735 736 add_wildcard(alias); 737 return 1; 738 } 739 ADD_TO_DEVTABLE("parisc", struct parisc_device_id, do_parisc_entry); 740 741 /* Looks like: sdio:cNvNdN. */ 742 static int do_sdio_entry(const char *filename, 743 struct sdio_device_id *id, char *alias) 744 { 745 id->class = TO_NATIVE(id->class); 746 id->vendor = TO_NATIVE(id->vendor); 747 id->device = TO_NATIVE(id->device); 748 749 strcpy(alias, "sdio:"); 750 ADD(alias, "c", id->class != (__u8)SDIO_ANY_ID, id->class); 751 ADD(alias, "v", id->vendor != (__u16)SDIO_ANY_ID, id->vendor); 752 ADD(alias, "d", id->device != (__u16)SDIO_ANY_ID, id->device); 753 add_wildcard(alias); 754 return 1; 755 } 756 ADD_TO_DEVTABLE("sdio", struct sdio_device_id, do_sdio_entry); 757 758 /* Looks like: ssb:vNidNrevN. */ 759 static int do_ssb_entry(const char *filename, 760 struct ssb_device_id *id, char *alias) 761 { 762 id->vendor = TO_NATIVE(id->vendor); 763 id->coreid = TO_NATIVE(id->coreid); 764 id->revision = TO_NATIVE(id->revision); 765 766 strcpy(alias, "ssb:"); 767 ADD(alias, "v", id->vendor != SSB_ANY_VENDOR, id->vendor); 768 ADD(alias, "id", id->coreid != SSB_ANY_ID, id->coreid); 769 ADD(alias, "rev", id->revision != SSB_ANY_REV, id->revision); 770 add_wildcard(alias); 771 return 1; 772 } 773 ADD_TO_DEVTABLE("ssb", struct ssb_device_id, do_ssb_entry); 774 775 /* Looks like: bcma:mNidNrevNclN. */ 776 static int do_bcma_entry(const char *filename, 777 struct bcma_device_id *id, char *alias) 778 { 779 id->manuf = TO_NATIVE(id->manuf); 780 id->id = TO_NATIVE(id->id); 781 id->rev = TO_NATIVE(id->rev); 782 id->class = TO_NATIVE(id->class); 783 784 strcpy(alias, "bcma:"); 785 ADD(alias, "m", id->manuf != BCMA_ANY_MANUF, id->manuf); 786 ADD(alias, "id", id->id != BCMA_ANY_ID, id->id); 787 ADD(alias, "rev", id->rev != BCMA_ANY_REV, id->rev); 788 ADD(alias, "cl", id->class != BCMA_ANY_CLASS, id->class); 789 add_wildcard(alias); 790 return 1; 791 } 792 ADD_TO_DEVTABLE("bcma", struct bcma_device_id, do_bcma_entry); 793 794 /* Looks like: virtio:dNvN */ 795 static int do_virtio_entry(const char *filename, struct virtio_device_id *id, 796 char *alias) 797 { 798 id->device = TO_NATIVE(id->device); 799 id->vendor = TO_NATIVE(id->vendor); 800 801 strcpy(alias, "virtio:"); 802 ADD(alias, "d", id->device != VIRTIO_DEV_ANY_ID, id->device); 803 ADD(alias, "v", id->vendor != VIRTIO_DEV_ANY_ID, id->vendor); 804 805 add_wildcard(alias); 806 return 1; 807 } 808 ADD_TO_DEVTABLE("virtio", struct virtio_device_id, do_virtio_entry); 809 810 /* 811 * Looks like: vmbus:guid 812 * Each byte of the guid will be represented by two hex characters 813 * in the name. 814 */ 815 816 static int do_vmbus_entry(const char *filename, struct hv_vmbus_device_id *id, 817 char *alias) 818 { 819 int i; 820 char guid_name[((sizeof(id->guid) + 1)) * 2]; 821 822 for (i = 0; i < (sizeof(id->guid) * 2); i += 2) 823 sprintf(&guid_name[i], "%02x", id->guid[i/2]); 824 825 strcpy(alias, "vmbus:"); 826 strcat(alias, guid_name); 827 828 return 1; 829 } 830 ADD_TO_DEVTABLE("vmbus", struct hv_vmbus_device_id, do_vmbus_entry); 831 832 /* Looks like: i2c:S */ 833 static int do_i2c_entry(const char *filename, struct i2c_device_id *id, 834 char *alias) 835 { 836 sprintf(alias, I2C_MODULE_PREFIX "%s", id->name); 837 838 return 1; 839 } 840 ADD_TO_DEVTABLE("i2c", struct i2c_device_id, do_i2c_entry); 841 842 /* Looks like: spi:S */ 843 static int do_spi_entry(const char *filename, struct spi_device_id *id, 844 char *alias) 845 { 846 sprintf(alias, SPI_MODULE_PREFIX "%s", id->name); 847 848 return 1; 849 } 850 ADD_TO_DEVTABLE("spi", struct spi_device_id, do_spi_entry); 851 852 static const struct dmifield { 853 const char *prefix; 854 int field; 855 } dmi_fields[] = { 856 { "bvn", DMI_BIOS_VENDOR }, 857 { "bvr", DMI_BIOS_VERSION }, 858 { "bd", DMI_BIOS_DATE }, 859 { "svn", DMI_SYS_VENDOR }, 860 { "pn", DMI_PRODUCT_NAME }, 861 { "pvr", DMI_PRODUCT_VERSION }, 862 { "rvn", DMI_BOARD_VENDOR }, 863 { "rn", DMI_BOARD_NAME }, 864 { "rvr", DMI_BOARD_VERSION }, 865 { "cvn", DMI_CHASSIS_VENDOR }, 866 { "ct", DMI_CHASSIS_TYPE }, 867 { "cvr", DMI_CHASSIS_VERSION }, 868 { NULL, DMI_NONE } 869 }; 870 871 static void dmi_ascii_filter(char *d, const char *s) 872 { 873 /* Filter out characters we don't want to see in the modalias string */ 874 for (; *s; s++) 875 if (*s > ' ' && *s < 127 && *s != ':') 876 *(d++) = *s; 877 878 *d = 0; 879 } 880 881 882 static int do_dmi_entry(const char *filename, struct dmi_system_id *id, 883 char *alias) 884 { 885 int i, j; 886 887 sprintf(alias, "dmi*"); 888 889 for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) { 890 for (j = 0; j < 4; j++) { 891 if (id->matches[j].slot && 892 id->matches[j].slot == dmi_fields[i].field) { 893 sprintf(alias + strlen(alias), ":%s*", 894 dmi_fields[i].prefix); 895 dmi_ascii_filter(alias + strlen(alias), 896 id->matches[j].substr); 897 strcat(alias, "*"); 898 } 899 } 900 } 901 902 strcat(alias, ":"); 903 return 1; 904 } 905 ADD_TO_DEVTABLE("dmi", struct dmi_system_id, do_dmi_entry); 906 907 static int do_platform_entry(const char *filename, 908 struct platform_device_id *id, char *alias) 909 { 910 sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name); 911 return 1; 912 } 913 ADD_TO_DEVTABLE("platform", struct platform_device_id, do_platform_entry); 914 915 static int do_mdio_entry(const char *filename, 916 struct mdio_device_id *id, char *alias) 917 { 918 int i; 919 920 alias += sprintf(alias, MDIO_MODULE_PREFIX); 921 922 for (i = 0; i < 32; i++) { 923 if (!((id->phy_id_mask >> (31-i)) & 1)) 924 *(alias++) = '?'; 925 else if ((id->phy_id >> (31-i)) & 1) 926 *(alias++) = '1'; 927 else 928 *(alias++) = '0'; 929 } 930 931 /* Terminate the string */ 932 *alias = 0; 933 934 return 1; 935 } 936 ADD_TO_DEVTABLE("mdio", struct mdio_device_id, do_mdio_entry); 937 938 /* Looks like: zorro:iN. */ 939 static int do_zorro_entry(const char *filename, struct zorro_device_id *id, 940 char *alias) 941 { 942 id->id = TO_NATIVE(id->id); 943 strcpy(alias, "zorro:"); 944 ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id); 945 return 1; 946 } 947 ADD_TO_DEVTABLE("zorro", struct zorro_device_id, do_zorro_entry); 948 949 /* looks like: "pnp:dD" */ 950 static int do_isapnp_entry(const char *filename, 951 struct isapnp_device_id *id, char *alias) 952 { 953 sprintf(alias, "pnp:d%c%c%c%x%x%x%x*", 954 'A' + ((id->vendor >> 2) & 0x3f) - 1, 955 'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1, 956 'A' + ((id->vendor >> 8) & 0x1f) - 1, 957 (id->function >> 4) & 0x0f, id->function & 0x0f, 958 (id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f); 959 return 1; 960 } 961 ADD_TO_DEVTABLE("isapnp", struct isapnp_device_id, do_isapnp_entry); 962 963 /* 964 * Append a match expression for a single masked hex digit. 965 * outp points to a pointer to the character at which to append. 966 * *outp is updated on return to point just after the appended text, 967 * to facilitate further appending. 968 */ 969 static void append_nibble_mask(char **outp, 970 unsigned int nibble, unsigned int mask) 971 { 972 char *p = *outp; 973 unsigned int i; 974 975 switch (mask) { 976 case 0: 977 *p++ = '?'; 978 break; 979 980 case 0xf: 981 p += sprintf(p, "%X", nibble); 982 break; 983 984 default: 985 /* 986 * Dumbly emit a match pattern for all possible matching 987 * digits. This could be improved in some cases using ranges, 988 * but it has the advantage of being trivially correct, and is 989 * often optimal. 990 */ 991 *p++ = '['; 992 for (i = 0; i < 0x10; i++) 993 if ((i & mask) == nibble) 994 p += sprintf(p, "%X", i); 995 *p++ = ']'; 996 } 997 998 /* Ensure that the string remains NUL-terminated: */ 999 *p = '\0'; 1000 1001 /* Advance the caller's end-of-string pointer: */ 1002 *outp = p; 1003 } 1004 1005 /* 1006 * looks like: "amba:dN" 1007 * 1008 * N is exactly 8 digits, where each is an upper-case hex digit, or 1009 * a ? or [] pattern matching exactly one digit. 1010 */ 1011 static int do_amba_entry(const char *filename, 1012 struct amba_id *id, char *alias) 1013 { 1014 unsigned int digit; 1015 char *p = alias; 1016 1017 if ((id->id & id->mask) != id->id) 1018 fatal("%s: Masked-off bit(s) of AMBA device ID are non-zero: " 1019 "id=0x%08X, mask=0x%08X. Please fix this driver.\n", 1020 filename, id->id, id->mask); 1021 1022 p += sprintf(alias, "amba:d"); 1023 for (digit = 0; digit < 8; digit++) 1024 append_nibble_mask(&p, 1025 (id->id >> (4 * (7 - digit))) & 0xf, 1026 (id->mask >> (4 * (7 - digit))) & 0xf); 1027 1028 return 1; 1029 } 1030 ADD_TO_DEVTABLE("amba", struct amba_id, do_amba_entry); 1031 1032 /* LOOKS like x86cpu:vendor:VVVV:family:FFFF:model:MMMM:feature:*,FEAT,* 1033 * All fields are numbers. It would be nicer to use strings for vendor 1034 * and feature, but getting those out of the build system here is too 1035 * complicated. 1036 */ 1037 1038 static int do_x86cpu_entry(const char *filename, struct x86_cpu_id *id, 1039 char *alias) 1040 { 1041 id->feature = TO_NATIVE(id->feature); 1042 id->family = TO_NATIVE(id->family); 1043 id->model = TO_NATIVE(id->model); 1044 id->vendor = TO_NATIVE(id->vendor); 1045 1046 strcpy(alias, "x86cpu:"); 1047 ADD(alias, "vendor:", id->vendor != X86_VENDOR_ANY, id->vendor); 1048 ADD(alias, ":family:", id->family != X86_FAMILY_ANY, id->family); 1049 ADD(alias, ":model:", id->model != X86_MODEL_ANY, id->model); 1050 strcat(alias, ":feature:*"); 1051 if (id->feature != X86_FEATURE_ANY) 1052 sprintf(alias + strlen(alias), "%04X*", id->feature); 1053 return 1; 1054 } 1055 ADD_TO_DEVTABLE("x86cpu", struct x86_cpu_id, do_x86cpu_entry); 1056 1057 /* Does namelen bytes of name exactly match the symbol? */ 1058 static bool sym_is(const char *name, unsigned namelen, const char *symbol) 1059 { 1060 if (namelen != strlen(symbol)) 1061 return false; 1062 1063 return memcmp(name, symbol, namelen) == 0; 1064 } 1065 1066 static void do_table(void *symval, unsigned long size, 1067 unsigned long id_size, 1068 const char *device_id, 1069 void *function, 1070 struct module *mod) 1071 { 1072 unsigned int i; 1073 char alias[500]; 1074 int (*do_entry)(const char *, void *entry, char *alias) = function; 1075 1076 device_id_check(mod->name, device_id, size, id_size, symval); 1077 /* Leave last one: it's the terminator. */ 1078 size -= id_size; 1079 1080 for (i = 0; i < size; i += id_size) { 1081 if (do_entry(mod->name, symval+i, alias)) { 1082 buf_printf(&mod->dev_table_buf, 1083 "MODULE_ALIAS(\"%s\");\n", alias); 1084 } 1085 } 1086 } 1087 1088 /* Create MODULE_ALIAS() statements. 1089 * At this time, we cannot write the actual output C source yet, 1090 * so we write into the mod->dev_table_buf buffer. */ 1091 void handle_moddevtable(struct module *mod, struct elf_info *info, 1092 Elf_Sym *sym, const char *symname) 1093 { 1094 void *symval; 1095 char *zeros = NULL; 1096 const char *name; 1097 unsigned int namelen; 1098 1099 /* We're looking for a section relative symbol */ 1100 if (!sym->st_shndx || get_secindex(info, sym) >= info->num_sections) 1101 return; 1102 1103 /* All our symbols are of form <prefix>__mod_XXX_device_table. */ 1104 name = strstr(symname, "__mod_"); 1105 if (!name) 1106 return; 1107 name += strlen("__mod_"); 1108 namelen = strlen(name); 1109 if (namelen < strlen("_device_table")) 1110 return; 1111 if (strcmp(name + namelen - strlen("_device_table"), "_device_table")) 1112 return; 1113 namelen -= strlen("_device_table"); 1114 1115 /* Handle all-NULL symbols allocated into .bss */ 1116 if (info->sechdrs[get_secindex(info, sym)].sh_type & SHT_NOBITS) { 1117 zeros = calloc(1, sym->st_size); 1118 symval = zeros; 1119 } else { 1120 symval = (void *)info->hdr 1121 + info->sechdrs[get_secindex(info, sym)].sh_offset 1122 + sym->st_value; 1123 } 1124 1125 /* First handle the "special" cases */ 1126 if (sym_is(name, namelen, "usb")) 1127 do_usb_table(symval, sym->st_size, mod); 1128 else if (sym_is(name, namelen, "pnp")) 1129 do_pnp_device_entry(symval, sym->st_size, mod); 1130 else if (sym_is(name, namelen, "pnp_card")) 1131 do_pnp_card_entries(symval, sym->st_size, mod); 1132 else { 1133 struct devtable **p; 1134 INIT_SECTION(__devtable); 1135 1136 for (p = __start___devtable; p < __stop___devtable; p++) { 1137 if (sym_is(name, namelen, (*p)->device_id)) { 1138 do_table(symval, sym->st_size, (*p)->id_size, 1139 (*p)->device_id, (*p)->function, mod); 1140 break; 1141 } 1142 } 1143 } 1144 free(zeros); 1145 } 1146 1147 /* Now add out buffered information to the generated C source */ 1148 void add_moddevtable(struct buffer *buf, struct module *mod) 1149 { 1150 buf_printf(buf, "\n"); 1151 buf_write(buf, mod->dev_table_buf.p, mod->dev_table_buf.pos); 1152 free(mod->dev_table_buf.p); 1153 } 1154