1 /* 2 * Copyright (c) 2008-2009 Atheros Communications Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/kernel.h> 20 #include <linux/export.h> 21 #include <net/cfg80211.h> 22 #include <net/mac80211.h> 23 #include "regd.h" 24 #include "regd_common.h" 25 26 static int __ath_regd_init(struct ath_regulatory *reg); 27 28 /* 29 * This is a set of common rules used by our world regulatory domains. 30 * We have 12 world regulatory domains. To save space we consolidate 31 * the regulatory domains in 5 structures by frequency and change 32 * the flags on our reg_notifier() on a case by case basis. 33 */ 34 35 /* Only these channels all allow active scan on all world regulatory domains */ 36 #define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0) 37 38 /* We enable active scan on these a case by case basis by regulatory domain */ 39 #define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\ 40 NL80211_RRF_PASSIVE_SCAN) 41 #define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\ 42 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM) 43 44 /* We allow IBSS on these on a case by case basis by regulatory domain */ 45 #define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 80, 0, 30,\ 46 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) 47 #define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 80, 0, 30,\ 48 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) 49 #define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 80, 0, 30,\ 50 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) 51 52 #define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \ 53 ATH9K_2GHZ_CH12_13, \ 54 ATH9K_2GHZ_CH14 55 56 #define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \ 57 ATH9K_5GHZ_5470_5850 58 59 /* This one skips what we call "mid band" */ 60 #define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \ 61 ATH9K_5GHZ_5725_5850 62 63 /* Can be used for: 64 * 0x60, 0x61, 0x62 */ 65 static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = { 66 .n_reg_rules = 5, 67 .alpha2 = "99", 68 .reg_rules = { 69 ATH9K_2GHZ_ALL, 70 ATH9K_5GHZ_ALL, 71 } 72 }; 73 74 /* Can be used by 0x63 and 0x65 */ 75 static const struct ieee80211_regdomain ath_world_regdom_63_65 = { 76 .n_reg_rules = 4, 77 .alpha2 = "99", 78 .reg_rules = { 79 ATH9K_2GHZ_CH01_11, 80 ATH9K_2GHZ_CH12_13, 81 ATH9K_5GHZ_NO_MIDBAND, 82 } 83 }; 84 85 /* Can be used by 0x64 only */ 86 static const struct ieee80211_regdomain ath_world_regdom_64 = { 87 .n_reg_rules = 3, 88 .alpha2 = "99", 89 .reg_rules = { 90 ATH9K_2GHZ_CH01_11, 91 ATH9K_5GHZ_NO_MIDBAND, 92 } 93 }; 94 95 /* Can be used by 0x66 and 0x69 */ 96 static const struct ieee80211_regdomain ath_world_regdom_66_69 = { 97 .n_reg_rules = 3, 98 .alpha2 = "99", 99 .reg_rules = { 100 ATH9K_2GHZ_CH01_11, 101 ATH9K_5GHZ_ALL, 102 } 103 }; 104 105 /* Can be used by 0x67, 0x68, 0x6A and 0x6C */ 106 static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = { 107 .n_reg_rules = 4, 108 .alpha2 = "99", 109 .reg_rules = { 110 ATH9K_2GHZ_CH01_11, 111 ATH9K_2GHZ_CH12_13, 112 ATH9K_5GHZ_ALL, 113 } 114 }; 115 116 static inline bool is_wwr_sku(u16 regd) 117 { 118 return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) && 119 (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) || 120 (regd == WORLD)); 121 } 122 123 static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg) 124 { 125 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG; 126 } 127 128 bool ath_is_world_regd(struct ath_regulatory *reg) 129 { 130 return is_wwr_sku(ath_regd_get_eepromRD(reg)); 131 } 132 EXPORT_SYMBOL(ath_is_world_regd); 133 134 static const struct ieee80211_regdomain *ath_default_world_regdomain(void) 135 { 136 /* this is the most restrictive */ 137 return &ath_world_regdom_64; 138 } 139 140 static const struct 141 ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg) 142 { 143 switch (reg->regpair->regDmnEnum) { 144 case 0x60: 145 case 0x61: 146 case 0x62: 147 return &ath_world_regdom_60_61_62; 148 case 0x63: 149 case 0x65: 150 return &ath_world_regdom_63_65; 151 case 0x64: 152 return &ath_world_regdom_64; 153 case 0x66: 154 case 0x69: 155 return &ath_world_regdom_66_69; 156 case 0x67: 157 case 0x68: 158 case 0x6A: 159 case 0x6C: 160 return &ath_world_regdom_67_68_6A_6C; 161 default: 162 WARN_ON(1); 163 return ath_default_world_regdomain(); 164 } 165 } 166 167 bool ath_is_49ghz_allowed(u16 regdomain) 168 { 169 /* possibly more */ 170 return regdomain == MKK9_MKKC; 171 } 172 EXPORT_SYMBOL(ath_is_49ghz_allowed); 173 174 /* Frequency is one where radar detection is required */ 175 static bool ath_is_radar_freq(u16 center_freq) 176 { 177 return (center_freq >= 5260 && center_freq <= 5700); 178 } 179 180 /* 181 * N.B: These exception rules do not apply radar freqs. 182 * 183 * - We enable adhoc (or beaconing) if allowed by 11d 184 * - We enable active scan if the channel is allowed by 11d 185 * - If no country IE has been processed and a we determine we have 186 * received a beacon on a channel we can enable active scan and 187 * adhoc (or beaconing). 188 */ 189 static void 190 ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 191 enum nl80211_reg_initiator initiator) 192 { 193 enum ieee80211_band band; 194 struct ieee80211_supported_band *sband; 195 const struct ieee80211_reg_rule *reg_rule; 196 struct ieee80211_channel *ch; 197 unsigned int i; 198 199 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 200 201 if (!wiphy->bands[band]) 202 continue; 203 204 sband = wiphy->bands[band]; 205 206 for (i = 0; i < sband->n_channels; i++) { 207 208 ch = &sband->channels[i]; 209 210 if (ath_is_radar_freq(ch->center_freq) || 211 (ch->flags & IEEE80211_CHAN_RADAR)) 212 continue; 213 214 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 215 reg_rule = freq_reg_info(wiphy, ch->center_freq); 216 if (IS_ERR(reg_rule)) 217 continue; 218 /* 219 * If 11d had a rule for this channel ensure 220 * we enable adhoc/beaconing if it allows us to 221 * use it. Note that we would have disabled it 222 * by applying our static world regdomain by 223 * default during init, prior to calling our 224 * regulatory_hint(). 225 */ 226 if (!(reg_rule->flags & 227 NL80211_RRF_NO_IBSS)) 228 ch->flags &= 229 ~IEEE80211_CHAN_NO_IBSS; 230 if (!(reg_rule->flags & 231 NL80211_RRF_PASSIVE_SCAN)) 232 ch->flags &= 233 ~IEEE80211_CHAN_PASSIVE_SCAN; 234 } else { 235 if (ch->beacon_found) 236 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS | 237 IEEE80211_CHAN_PASSIVE_SCAN); 238 } 239 } 240 } 241 242 } 243 244 /* Allows active scan scan on Ch 12 and 13 */ 245 static void 246 ath_reg_apply_active_scan_flags(struct wiphy *wiphy, 247 enum nl80211_reg_initiator initiator) 248 { 249 struct ieee80211_supported_band *sband; 250 struct ieee80211_channel *ch; 251 const struct ieee80211_reg_rule *reg_rule; 252 253 sband = wiphy->bands[IEEE80211_BAND_2GHZ]; 254 if (!sband) 255 return; 256 257 /* 258 * If no country IE has been received always enable active scan 259 * on these channels. This is only done for specific regulatory SKUs 260 */ 261 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 262 ch = &sband->channels[11]; /* CH 12 */ 263 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 264 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 265 ch = &sband->channels[12]; /* CH 13 */ 266 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 267 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 268 return; 269 } 270 271 /* 272 * If a country IE has been received check its rule for this 273 * channel first before enabling active scan. The passive scan 274 * would have been enforced by the initial processing of our 275 * custom regulatory domain. 276 */ 277 278 ch = &sband->channels[11]; /* CH 12 */ 279 reg_rule = freq_reg_info(wiphy, ch->center_freq); 280 if (!IS_ERR(reg_rule)) { 281 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) 282 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 283 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 284 } 285 286 ch = &sband->channels[12]; /* CH 13 */ 287 reg_rule = freq_reg_info(wiphy, ch->center_freq); 288 if (!IS_ERR(reg_rule)) { 289 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) 290 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 291 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 292 } 293 } 294 295 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */ 296 static void ath_reg_apply_radar_flags(struct wiphy *wiphy) 297 { 298 struct ieee80211_supported_band *sband; 299 struct ieee80211_channel *ch; 300 unsigned int i; 301 302 if (!wiphy->bands[IEEE80211_BAND_5GHZ]) 303 return; 304 305 sband = wiphy->bands[IEEE80211_BAND_5GHZ]; 306 307 for (i = 0; i < sband->n_channels; i++) { 308 ch = &sband->channels[i]; 309 if (!ath_is_radar_freq(ch->center_freq)) 310 continue; 311 /* We always enable radar detection/DFS on this 312 * frequency range. Additionally we also apply on 313 * this frequency range: 314 * - If STA mode does not yet have DFS supports disable 315 * active scanning 316 * - If adhoc mode does not support DFS yet then 317 * disable adhoc in the frequency. 318 * - If AP mode does not yet support radar detection/DFS 319 * do not allow AP mode 320 */ 321 if (!(ch->flags & IEEE80211_CHAN_DISABLED)) 322 ch->flags |= IEEE80211_CHAN_RADAR | 323 IEEE80211_CHAN_NO_IBSS | 324 IEEE80211_CHAN_PASSIVE_SCAN; 325 } 326 } 327 328 static void ath_reg_apply_world_flags(struct wiphy *wiphy, 329 enum nl80211_reg_initiator initiator, 330 struct ath_regulatory *reg) 331 { 332 switch (reg->regpair->regDmnEnum) { 333 case 0x60: 334 case 0x63: 335 case 0x66: 336 case 0x67: 337 case 0x6C: 338 ath_reg_apply_beaconing_flags(wiphy, initiator); 339 break; 340 case 0x68: 341 ath_reg_apply_beaconing_flags(wiphy, initiator); 342 ath_reg_apply_active_scan_flags(wiphy, initiator); 343 break; 344 } 345 } 346 347 static u16 ath_regd_find_country_by_name(char *alpha2) 348 { 349 unsigned int i; 350 351 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 352 if (!memcmp(allCountries[i].isoName, alpha2, 2)) 353 return allCountries[i].countryCode; 354 } 355 356 return -1; 357 } 358 359 static int __ath_reg_dyn_country(struct wiphy *wiphy, 360 struct ath_regulatory *reg, 361 struct regulatory_request *request) 362 { 363 u16 country_code; 364 365 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 366 !ath_is_world_regd(reg)) 367 return -EINVAL; 368 369 country_code = ath_regd_find_country_by_name(request->alpha2); 370 if (country_code == (u16) -1) 371 return -EINVAL; 372 373 reg->current_rd = COUNTRY_ERD_FLAG; 374 reg->current_rd |= country_code; 375 376 __ath_regd_init(reg); 377 378 ath_reg_apply_world_flags(wiphy, request->initiator, reg); 379 380 return 0; 381 } 382 383 static void ath_reg_dyn_country(struct wiphy *wiphy, 384 struct ath_regulatory *reg, 385 struct regulatory_request *request) 386 { 387 if (__ath_reg_dyn_country(wiphy, reg, request)) 388 return; 389 390 printk(KERN_DEBUG "ath: regdomain 0x%0x " 391 "dynamically updated by %s\n", 392 reg->current_rd, 393 reg_initiator_name(request->initiator)); 394 } 395 396 static bool dynamic_country_user_possible(struct ath_regulatory *reg) 397 { 398 if (config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_CERT_TESTING)) 399 return true; 400 401 switch (reg->country_code) { 402 case CTRY_UNITED_STATES: 403 case CTRY_JAPAN1: 404 case CTRY_JAPAN2: 405 case CTRY_JAPAN3: 406 case CTRY_JAPAN4: 407 case CTRY_JAPAN5: 408 case CTRY_JAPAN6: 409 case CTRY_JAPAN7: 410 case CTRY_JAPAN8: 411 case CTRY_JAPAN9: 412 case CTRY_JAPAN10: 413 case CTRY_JAPAN11: 414 case CTRY_JAPAN12: 415 case CTRY_JAPAN13: 416 case CTRY_JAPAN14: 417 case CTRY_JAPAN15: 418 case CTRY_JAPAN16: 419 case CTRY_JAPAN17: 420 case CTRY_JAPAN18: 421 case CTRY_JAPAN19: 422 case CTRY_JAPAN20: 423 case CTRY_JAPAN21: 424 case CTRY_JAPAN22: 425 case CTRY_JAPAN23: 426 case CTRY_JAPAN24: 427 case CTRY_JAPAN25: 428 case CTRY_JAPAN26: 429 case CTRY_JAPAN27: 430 case CTRY_JAPAN28: 431 case CTRY_JAPAN29: 432 case CTRY_JAPAN30: 433 case CTRY_JAPAN31: 434 case CTRY_JAPAN32: 435 case CTRY_JAPAN33: 436 case CTRY_JAPAN34: 437 case CTRY_JAPAN35: 438 case CTRY_JAPAN36: 439 case CTRY_JAPAN37: 440 case CTRY_JAPAN38: 441 case CTRY_JAPAN39: 442 case CTRY_JAPAN40: 443 case CTRY_JAPAN41: 444 case CTRY_JAPAN42: 445 case CTRY_JAPAN43: 446 case CTRY_JAPAN44: 447 case CTRY_JAPAN45: 448 case CTRY_JAPAN46: 449 case CTRY_JAPAN47: 450 case CTRY_JAPAN48: 451 case CTRY_JAPAN49: 452 case CTRY_JAPAN50: 453 case CTRY_JAPAN51: 454 case CTRY_JAPAN52: 455 case CTRY_JAPAN53: 456 case CTRY_JAPAN54: 457 case CTRY_JAPAN55: 458 case CTRY_JAPAN56: 459 case CTRY_JAPAN57: 460 case CTRY_JAPAN58: 461 case CTRY_JAPAN59: 462 return false; 463 } 464 465 return true; 466 } 467 468 static void ath_reg_dyn_country_user(struct wiphy *wiphy, 469 struct ath_regulatory *reg, 470 struct regulatory_request *request) 471 { 472 if (!config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) 473 return; 474 if (!dynamic_country_user_possible(reg)) 475 return; 476 ath_reg_dyn_country(wiphy, reg, request); 477 } 478 479 void ath_reg_notifier_apply(struct wiphy *wiphy, 480 struct regulatory_request *request, 481 struct ath_regulatory *reg) 482 { 483 struct ath_common *common = container_of(reg, struct ath_common, 484 regulatory); 485 /* We always apply this */ 486 ath_reg_apply_radar_flags(wiphy); 487 488 /* 489 * This would happen when we have sent a custom regulatory request 490 * a world regulatory domain and the scheduler hasn't yet processed 491 * any pending requests in the queue. 492 */ 493 if (!request) 494 return; 495 496 switch (request->initiator) { 497 case NL80211_REGDOM_SET_BY_CORE: 498 /* 499 * If common->reg_world_copy is world roaming it means we *were* 500 * world roaming... so we now have to restore that data. 501 */ 502 if (!ath_is_world_regd(&common->reg_world_copy)) 503 break; 504 505 memcpy(reg, &common->reg_world_copy, 506 sizeof(struct ath_regulatory)); 507 break; 508 case NL80211_REGDOM_SET_BY_DRIVER: 509 break; 510 case NL80211_REGDOM_SET_BY_USER: 511 ath_reg_dyn_country_user(wiphy, reg, request); 512 break; 513 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 514 ath_reg_dyn_country(wiphy, reg, request); 515 break; 516 } 517 } 518 EXPORT_SYMBOL(ath_reg_notifier_apply); 519 520 static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg) 521 { 522 u16 rd = ath_regd_get_eepromRD(reg); 523 int i; 524 525 if (rd & COUNTRY_ERD_FLAG) { 526 /* EEPROM value is a country code */ 527 u16 cc = rd & ~COUNTRY_ERD_FLAG; 528 printk(KERN_DEBUG 529 "ath: EEPROM indicates we should expect " 530 "a country code\n"); 531 for (i = 0; i < ARRAY_SIZE(allCountries); i++) 532 if (allCountries[i].countryCode == cc) 533 return true; 534 } else { 535 /* EEPROM value is a regpair value */ 536 if (rd != CTRY_DEFAULT) 537 printk(KERN_DEBUG "ath: EEPROM indicates we " 538 "should expect a direct regpair map\n"); 539 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) 540 if (regDomainPairs[i].regDmnEnum == rd) 541 return true; 542 } 543 printk(KERN_DEBUG 544 "ath: invalid regulatory domain/country code 0x%x\n", rd); 545 return false; 546 } 547 548 /* EEPROM country code to regpair mapping */ 549 static struct country_code_to_enum_rd* 550 ath_regd_find_country(u16 countryCode) 551 { 552 int i; 553 554 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 555 if (allCountries[i].countryCode == countryCode) 556 return &allCountries[i]; 557 } 558 return NULL; 559 } 560 561 /* EEPROM rd code to regpair mapping */ 562 static struct country_code_to_enum_rd* 563 ath_regd_find_country_by_rd(int regdmn) 564 { 565 int i; 566 567 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 568 if (allCountries[i].regDmnEnum == regdmn) 569 return &allCountries[i]; 570 } 571 return NULL; 572 } 573 574 /* Returns the map of the EEPROM set RD to a country code */ 575 static u16 ath_regd_get_default_country(u16 rd) 576 { 577 if (rd & COUNTRY_ERD_FLAG) { 578 struct country_code_to_enum_rd *country = NULL; 579 u16 cc = rd & ~COUNTRY_ERD_FLAG; 580 581 country = ath_regd_find_country(cc); 582 if (country != NULL) 583 return cc; 584 } 585 586 return CTRY_DEFAULT; 587 } 588 589 static struct reg_dmn_pair_mapping* 590 ath_get_regpair(int regdmn) 591 { 592 int i; 593 594 if (regdmn == NO_ENUMRD) 595 return NULL; 596 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) { 597 if (regDomainPairs[i].regDmnEnum == regdmn) 598 return ®DomainPairs[i]; 599 } 600 return NULL; 601 } 602 603 static int 604 ath_regd_init_wiphy(struct ath_regulatory *reg, 605 struct wiphy *wiphy, 606 void (*reg_notifier)(struct wiphy *wiphy, 607 struct regulatory_request *request)) 608 { 609 const struct ieee80211_regdomain *regd; 610 611 wiphy->reg_notifier = reg_notifier; 612 wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY; 613 614 if (ath_is_world_regd(reg)) { 615 /* 616 * Anything applied here (prior to wiphy registration) gets 617 * saved on the wiphy orig_* parameters 618 */ 619 regd = ath_world_regdomain(reg); 620 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; 621 } else { 622 /* 623 * This gets applied in the case of the absence of CRDA, 624 * it's our own custom world regulatory domain, similar to 625 * cfg80211's but we enable passive scanning. 626 */ 627 regd = ath_default_world_regdomain(); 628 } 629 wiphy_apply_custom_regulatory(wiphy, regd); 630 ath_reg_apply_radar_flags(wiphy); 631 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); 632 return 0; 633 } 634 635 /* 636 * Some users have reported their EEPROM programmed with 637 * 0x8000 set, this is not a supported regulatory domain 638 * but since we have more than one user with it we need 639 * a solution for them. We default to 0x64, which is the 640 * default Atheros world regulatory domain. 641 */ 642 static void ath_regd_sanitize(struct ath_regulatory *reg) 643 { 644 if (reg->current_rd != COUNTRY_ERD_FLAG) 645 return; 646 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n"); 647 reg->current_rd = 0x64; 648 } 649 650 static int __ath_regd_init(struct ath_regulatory *reg) 651 { 652 struct country_code_to_enum_rd *country = NULL; 653 u16 regdmn; 654 655 if (!reg) 656 return -EINVAL; 657 658 ath_regd_sanitize(reg); 659 660 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd); 661 662 if (!ath_regd_is_eeprom_valid(reg)) { 663 pr_err("Invalid EEPROM contents\n"); 664 return -EINVAL; 665 } 666 667 regdmn = ath_regd_get_eepromRD(reg); 668 reg->country_code = ath_regd_get_default_country(regdmn); 669 670 if (reg->country_code == CTRY_DEFAULT && 671 regdmn == CTRY_DEFAULT) { 672 printk(KERN_DEBUG "ath: EEPROM indicates default " 673 "country code should be used\n"); 674 reg->country_code = CTRY_UNITED_STATES; 675 } 676 677 if (reg->country_code == CTRY_DEFAULT) { 678 country = NULL; 679 } else { 680 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn " 681 "map search\n"); 682 country = ath_regd_find_country(reg->country_code); 683 if (country == NULL) { 684 printk(KERN_DEBUG 685 "ath: no valid country maps found for " 686 "country code: 0x%0x\n", 687 reg->country_code); 688 return -EINVAL; 689 } else { 690 regdmn = country->regDmnEnum; 691 printk(KERN_DEBUG "ath: country maps to " 692 "regdmn code: 0x%0x\n", 693 regdmn); 694 } 695 } 696 697 reg->regpair = ath_get_regpair(regdmn); 698 699 if (!reg->regpair) { 700 printk(KERN_DEBUG "ath: " 701 "No regulatory domain pair found, cannot continue\n"); 702 return -EINVAL; 703 } 704 705 if (!country) 706 country = ath_regd_find_country_by_rd(regdmn); 707 708 if (country) { 709 reg->alpha2[0] = country->isoName[0]; 710 reg->alpha2[1] = country->isoName[1]; 711 } else { 712 reg->alpha2[0] = '0'; 713 reg->alpha2[1] = '0'; 714 } 715 716 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n", 717 reg->alpha2[0], reg->alpha2[1]); 718 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n", 719 reg->regpair->regDmnEnum); 720 721 return 0; 722 } 723 724 int 725 ath_regd_init(struct ath_regulatory *reg, 726 struct wiphy *wiphy, 727 void (*reg_notifier)(struct wiphy *wiphy, 728 struct regulatory_request *request)) 729 { 730 struct ath_common *common = container_of(reg, struct ath_common, 731 regulatory); 732 int r; 733 734 r = __ath_regd_init(reg); 735 if (r) 736 return r; 737 738 if (ath_is_world_regd(reg)) 739 memcpy(&common->reg_world_copy, reg, 740 sizeof(struct ath_regulatory)); 741 742 ath_regd_init_wiphy(reg, wiphy, reg_notifier); 743 744 return 0; 745 } 746 EXPORT_SYMBOL(ath_regd_init); 747 748 u32 ath_regd_get_band_ctl(struct ath_regulatory *reg, 749 enum ieee80211_band band) 750 { 751 if (!reg->regpair || 752 (reg->country_code == CTRY_DEFAULT && 753 is_wwr_sku(ath_regd_get_eepromRD(reg)))) { 754 return SD_NO_CTL; 755 } 756 757 switch (band) { 758 case IEEE80211_BAND_2GHZ: 759 return reg->regpair->reg_2ghz_ctl; 760 case IEEE80211_BAND_5GHZ: 761 return reg->regpair->reg_5ghz_ctl; 762 default: 763 return NO_CTL; 764 } 765 } 766 EXPORT_SYMBOL(ath_regd_get_band_ctl); 767