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_NO_IR) 41 #define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\ 42 NL80211_RRF_NO_IR | \ 43 NL80211_RRF_NO_OFDM) 44 45 /* We allow IBSS on these on a case by case basis by regulatory domain */ 46 #define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 80, 0, 30,\ 47 NL80211_RRF_NO_IR) 48 #define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 80, 0, 30,\ 49 NL80211_RRF_NO_IR) 50 #define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 80, 0, 30,\ 51 NL80211_RRF_NO_IR) 52 53 #define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \ 54 ATH9K_2GHZ_CH12_13, \ 55 ATH9K_2GHZ_CH14 56 57 #define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \ 58 ATH9K_5GHZ_5470_5850 59 60 /* This one skips what we call "mid band" */ 61 #define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \ 62 ATH9K_5GHZ_5725_5850 63 64 /* Can be used for: 65 * 0x60, 0x61, 0x62 */ 66 static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = { 67 .n_reg_rules = 5, 68 .alpha2 = "99", 69 .reg_rules = { 70 ATH9K_2GHZ_ALL, 71 ATH9K_5GHZ_ALL, 72 } 73 }; 74 75 /* Can be used by 0x63 and 0x65 */ 76 static const struct ieee80211_regdomain ath_world_regdom_63_65 = { 77 .n_reg_rules = 4, 78 .alpha2 = "99", 79 .reg_rules = { 80 ATH9K_2GHZ_CH01_11, 81 ATH9K_2GHZ_CH12_13, 82 ATH9K_5GHZ_NO_MIDBAND, 83 } 84 }; 85 86 /* Can be used by 0x64 only */ 87 static const struct ieee80211_regdomain ath_world_regdom_64 = { 88 .n_reg_rules = 3, 89 .alpha2 = "99", 90 .reg_rules = { 91 ATH9K_2GHZ_CH01_11, 92 ATH9K_5GHZ_NO_MIDBAND, 93 } 94 }; 95 96 /* Can be used by 0x66 and 0x69 */ 97 static const struct ieee80211_regdomain ath_world_regdom_66_69 = { 98 .n_reg_rules = 3, 99 .alpha2 = "99", 100 .reg_rules = { 101 ATH9K_2GHZ_CH01_11, 102 ATH9K_5GHZ_ALL, 103 } 104 }; 105 106 /* Can be used by 0x67, 0x68, 0x6A and 0x6C */ 107 static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = { 108 .n_reg_rules = 4, 109 .alpha2 = "99", 110 .reg_rules = { 111 ATH9K_2GHZ_CH01_11, 112 ATH9K_2GHZ_CH12_13, 113 ATH9K_5GHZ_ALL, 114 } 115 }; 116 117 static bool dynamic_country_user_possible(struct ath_regulatory *reg) 118 { 119 if (config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_CERT_TESTING)) 120 return true; 121 122 switch (reg->country_code) { 123 case CTRY_UNITED_STATES: 124 case CTRY_JAPAN1: 125 case CTRY_JAPAN2: 126 case CTRY_JAPAN3: 127 case CTRY_JAPAN4: 128 case CTRY_JAPAN5: 129 case CTRY_JAPAN6: 130 case CTRY_JAPAN7: 131 case CTRY_JAPAN8: 132 case CTRY_JAPAN9: 133 case CTRY_JAPAN10: 134 case CTRY_JAPAN11: 135 case CTRY_JAPAN12: 136 case CTRY_JAPAN13: 137 case CTRY_JAPAN14: 138 case CTRY_JAPAN15: 139 case CTRY_JAPAN16: 140 case CTRY_JAPAN17: 141 case CTRY_JAPAN18: 142 case CTRY_JAPAN19: 143 case CTRY_JAPAN20: 144 case CTRY_JAPAN21: 145 case CTRY_JAPAN22: 146 case CTRY_JAPAN23: 147 case CTRY_JAPAN24: 148 case CTRY_JAPAN25: 149 case CTRY_JAPAN26: 150 case CTRY_JAPAN27: 151 case CTRY_JAPAN28: 152 case CTRY_JAPAN29: 153 case CTRY_JAPAN30: 154 case CTRY_JAPAN31: 155 case CTRY_JAPAN32: 156 case CTRY_JAPAN33: 157 case CTRY_JAPAN34: 158 case CTRY_JAPAN35: 159 case CTRY_JAPAN36: 160 case CTRY_JAPAN37: 161 case CTRY_JAPAN38: 162 case CTRY_JAPAN39: 163 case CTRY_JAPAN40: 164 case CTRY_JAPAN41: 165 case CTRY_JAPAN42: 166 case CTRY_JAPAN43: 167 case CTRY_JAPAN44: 168 case CTRY_JAPAN45: 169 case CTRY_JAPAN46: 170 case CTRY_JAPAN47: 171 case CTRY_JAPAN48: 172 case CTRY_JAPAN49: 173 case CTRY_JAPAN50: 174 case CTRY_JAPAN51: 175 case CTRY_JAPAN52: 176 case CTRY_JAPAN53: 177 case CTRY_JAPAN54: 178 case CTRY_JAPAN55: 179 case CTRY_JAPAN56: 180 case CTRY_JAPAN57: 181 case CTRY_JAPAN58: 182 case CTRY_JAPAN59: 183 return false; 184 } 185 186 return true; 187 } 188 189 static bool ath_reg_dyn_country_user_allow(struct ath_regulatory *reg) 190 { 191 if (!config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) 192 return false; 193 if (!dynamic_country_user_possible(reg)) 194 return false; 195 return true; 196 } 197 198 static inline bool is_wwr_sku(u16 regd) 199 { 200 return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) && 201 (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) || 202 (regd == WORLD)); 203 } 204 205 static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg) 206 { 207 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG; 208 } 209 210 bool ath_is_world_regd(struct ath_regulatory *reg) 211 { 212 return is_wwr_sku(ath_regd_get_eepromRD(reg)); 213 } 214 EXPORT_SYMBOL(ath_is_world_regd); 215 216 static const struct ieee80211_regdomain *ath_default_world_regdomain(void) 217 { 218 /* this is the most restrictive */ 219 return &ath_world_regdom_64; 220 } 221 222 static const struct 223 ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg) 224 { 225 switch (reg->regpair->reg_domain) { 226 case 0x60: 227 case 0x61: 228 case 0x62: 229 return &ath_world_regdom_60_61_62; 230 case 0x63: 231 case 0x65: 232 return &ath_world_regdom_63_65; 233 case 0x64: 234 return &ath_world_regdom_64; 235 case 0x66: 236 case 0x69: 237 return &ath_world_regdom_66_69; 238 case 0x67: 239 case 0x68: 240 case 0x6A: 241 case 0x6C: 242 return &ath_world_regdom_67_68_6A_6C; 243 default: 244 WARN_ON(1); 245 return ath_default_world_regdomain(); 246 } 247 } 248 249 bool ath_is_49ghz_allowed(u16 regdomain) 250 { 251 /* possibly more */ 252 return regdomain == MKK9_MKKC; 253 } 254 EXPORT_SYMBOL(ath_is_49ghz_allowed); 255 256 /* Frequency is one where radar detection is required */ 257 static bool ath_is_radar_freq(u16 center_freq) 258 { 259 return (center_freq >= 5260 && center_freq <= 5700); 260 } 261 262 static void ath_force_clear_no_ir_chan(struct wiphy *wiphy, 263 struct ieee80211_channel *ch) 264 { 265 const struct ieee80211_reg_rule *reg_rule; 266 267 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq)); 268 if (IS_ERR(reg_rule)) 269 return; 270 271 if (!(reg_rule->flags & NL80211_RRF_NO_IR)) 272 if (ch->flags & IEEE80211_CHAN_NO_IR) 273 ch->flags &= ~IEEE80211_CHAN_NO_IR; 274 } 275 276 static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq) 277 { 278 struct ieee80211_channel *ch; 279 280 ch = ieee80211_get_channel(wiphy, center_freq); 281 if (!ch) 282 return; 283 284 ath_force_clear_no_ir_chan(wiphy, ch); 285 } 286 287 static void ath_force_no_ir_chan(struct ieee80211_channel *ch) 288 { 289 ch->flags |= IEEE80211_CHAN_NO_IR; 290 } 291 292 static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq) 293 { 294 struct ieee80211_channel *ch; 295 296 ch = ieee80211_get_channel(wiphy, center_freq); 297 if (!ch) 298 return; 299 300 ath_force_no_ir_chan(ch); 301 } 302 303 static void 304 __ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 305 struct ath_regulatory *reg, 306 enum nl80211_reg_initiator initiator, 307 struct ieee80211_channel *ch) 308 { 309 if (ath_is_radar_freq(ch->center_freq) || 310 (ch->flags & IEEE80211_CHAN_RADAR)) 311 return; 312 313 switch (initiator) { 314 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 315 ath_force_clear_no_ir_chan(wiphy, ch); 316 break; 317 case NL80211_REGDOM_SET_BY_USER: 318 if (ath_reg_dyn_country_user_allow(reg)) 319 ath_force_clear_no_ir_chan(wiphy, ch); 320 break; 321 default: 322 if (ch->beacon_found) 323 ch->flags &= ~IEEE80211_CHAN_NO_IR; 324 } 325 } 326 327 /* 328 * These exception rules do not apply radar frequencies. 329 * 330 * - We enable initiating radiation if the country IE says its fine: 331 * - If no country IE has been processed and a we determine we have 332 * received a beacon on a channel we can enable initiating radiation. 333 */ 334 static void 335 ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 336 struct ath_regulatory *reg, 337 enum nl80211_reg_initiator initiator) 338 { 339 enum nl80211_band band; 340 struct ieee80211_supported_band *sband; 341 struct ieee80211_channel *ch; 342 unsigned int i; 343 344 for (band = 0; band < NUM_NL80211_BANDS; band++) { 345 if (!wiphy->bands[band]) 346 continue; 347 sband = wiphy->bands[band]; 348 for (i = 0; i < sband->n_channels; i++) { 349 ch = &sband->channels[i]; 350 __ath_reg_apply_beaconing_flags(wiphy, reg, 351 initiator, ch); 352 } 353 } 354 } 355 356 /** 357 * ath_reg_apply_ir_flags() 358 * @wiphy: the wiphy to use 359 * @initiator: the regulatory hint initiator 360 * 361 * If no country IE has been received always enable passive scan 362 * and no-ibss on these channels. This is only done for specific 363 * regulatory SKUs. 364 * 365 * If a country IE has been received check its rule for this 366 * channel first before enabling active scan. The passive scan 367 * would have been enforced by the initial processing of our 368 * custom regulatory domain. 369 */ 370 static void 371 ath_reg_apply_ir_flags(struct wiphy *wiphy, 372 struct ath_regulatory *reg, 373 enum nl80211_reg_initiator initiator) 374 { 375 struct ieee80211_supported_band *sband; 376 377 sband = wiphy->bands[NL80211_BAND_2GHZ]; 378 if (!sband) 379 return; 380 381 switch(initiator) { 382 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 383 ath_force_clear_no_ir_freq(wiphy, 2467); 384 ath_force_clear_no_ir_freq(wiphy, 2472); 385 break; 386 case NL80211_REGDOM_SET_BY_USER: 387 if (!ath_reg_dyn_country_user_allow(reg)) 388 break; 389 ath_force_clear_no_ir_freq(wiphy, 2467); 390 ath_force_clear_no_ir_freq(wiphy, 2472); 391 break; 392 default: 393 ath_force_no_ir_freq(wiphy, 2467); 394 ath_force_no_ir_freq(wiphy, 2472); 395 } 396 } 397 398 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */ 399 static void ath_reg_apply_radar_flags(struct wiphy *wiphy) 400 { 401 struct ieee80211_supported_band *sband; 402 struct ieee80211_channel *ch; 403 unsigned int i; 404 405 if (!wiphy->bands[NL80211_BAND_5GHZ]) 406 return; 407 408 sband = wiphy->bands[NL80211_BAND_5GHZ]; 409 410 for (i = 0; i < sband->n_channels; i++) { 411 ch = &sband->channels[i]; 412 if (!ath_is_radar_freq(ch->center_freq)) 413 continue; 414 /* We always enable radar detection/DFS on this 415 * frequency range. Additionally we also apply on 416 * this frequency range: 417 * - If STA mode does not yet have DFS supports disable 418 * active scanning 419 * - If adhoc mode does not support DFS yet then 420 * disable adhoc in the frequency. 421 * - If AP mode does not yet support radar detection/DFS 422 * do not allow AP mode 423 */ 424 if (!(ch->flags & IEEE80211_CHAN_DISABLED)) 425 ch->flags |= IEEE80211_CHAN_RADAR | 426 IEEE80211_CHAN_NO_IR; 427 } 428 } 429 430 static void ath_reg_apply_world_flags(struct wiphy *wiphy, 431 enum nl80211_reg_initiator initiator, 432 struct ath_regulatory *reg) 433 { 434 switch (reg->regpair->reg_domain) { 435 case 0x60: 436 case 0x63: 437 case 0x66: 438 case 0x67: 439 case 0x6C: 440 ath_reg_apply_beaconing_flags(wiphy, reg, initiator); 441 break; 442 case 0x68: 443 ath_reg_apply_beaconing_flags(wiphy, reg, initiator); 444 ath_reg_apply_ir_flags(wiphy, reg, initiator); 445 break; 446 default: 447 if (ath_reg_dyn_country_user_allow(reg)) 448 ath_reg_apply_beaconing_flags(wiphy, reg, initiator); 449 } 450 } 451 452 static u16 ath_regd_find_country_by_name(char *alpha2) 453 { 454 unsigned int i; 455 456 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 457 if (!memcmp(allCountries[i].isoName, alpha2, 2)) 458 return allCountries[i].countryCode; 459 } 460 461 return -1; 462 } 463 464 static int __ath_reg_dyn_country(struct wiphy *wiphy, 465 struct ath_regulatory *reg, 466 struct regulatory_request *request) 467 { 468 u16 country_code; 469 470 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 471 !ath_is_world_regd(reg)) 472 return -EINVAL; 473 474 country_code = ath_regd_find_country_by_name(request->alpha2); 475 if (country_code == (u16) -1) 476 return -EINVAL; 477 478 reg->current_rd = COUNTRY_ERD_FLAG; 479 reg->current_rd |= country_code; 480 481 __ath_regd_init(reg); 482 483 ath_reg_apply_world_flags(wiphy, request->initiator, reg); 484 485 return 0; 486 } 487 488 static void ath_reg_dyn_country(struct wiphy *wiphy, 489 struct ath_regulatory *reg, 490 struct regulatory_request *request) 491 { 492 if (__ath_reg_dyn_country(wiphy, reg, request)) 493 return; 494 495 printk(KERN_DEBUG "ath: regdomain 0x%0x " 496 "dynamically updated by %s\n", 497 reg->current_rd, 498 reg_initiator_name(request->initiator)); 499 } 500 501 void ath_reg_notifier_apply(struct wiphy *wiphy, 502 struct regulatory_request *request, 503 struct ath_regulatory *reg) 504 { 505 struct ath_common *common = container_of(reg, struct ath_common, 506 regulatory); 507 /* We always apply this */ 508 ath_reg_apply_radar_flags(wiphy); 509 510 /* 511 * This would happen when we have sent a custom regulatory request 512 * a world regulatory domain and the scheduler hasn't yet processed 513 * any pending requests in the queue. 514 */ 515 if (!request) 516 return; 517 518 reg->region = request->dfs_region; 519 switch (request->initiator) { 520 case NL80211_REGDOM_SET_BY_CORE: 521 /* 522 * If common->reg_world_copy is world roaming it means we *were* 523 * world roaming... so we now have to restore that data. 524 */ 525 if (!ath_is_world_regd(&common->reg_world_copy)) 526 break; 527 528 memcpy(reg, &common->reg_world_copy, 529 sizeof(struct ath_regulatory)); 530 break; 531 case NL80211_REGDOM_SET_BY_DRIVER: 532 break; 533 case NL80211_REGDOM_SET_BY_USER: 534 if (ath_reg_dyn_country_user_allow(reg)) 535 ath_reg_dyn_country(wiphy, reg, request); 536 break; 537 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 538 ath_reg_dyn_country(wiphy, reg, request); 539 break; 540 } 541 } 542 EXPORT_SYMBOL(ath_reg_notifier_apply); 543 544 static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg) 545 { 546 u16 rd = ath_regd_get_eepromRD(reg); 547 int i; 548 549 if (rd & COUNTRY_ERD_FLAG) { 550 /* EEPROM value is a country code */ 551 u16 cc = rd & ~COUNTRY_ERD_FLAG; 552 printk(KERN_DEBUG 553 "ath: EEPROM indicates we should expect " 554 "a country code\n"); 555 for (i = 0; i < ARRAY_SIZE(allCountries); i++) 556 if (allCountries[i].countryCode == cc) 557 return true; 558 } else { 559 /* EEPROM value is a regpair value */ 560 if (rd != CTRY_DEFAULT) 561 printk(KERN_DEBUG "ath: EEPROM indicates we " 562 "should expect a direct regpair map\n"); 563 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) 564 if (regDomainPairs[i].reg_domain == rd) 565 return true; 566 } 567 printk(KERN_DEBUG 568 "ath: invalid regulatory domain/country code 0x%x\n", rd); 569 return false; 570 } 571 572 /* EEPROM country code to regpair mapping */ 573 static struct country_code_to_enum_rd* 574 ath_regd_find_country(u16 countryCode) 575 { 576 int i; 577 578 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 579 if (allCountries[i].countryCode == countryCode) 580 return &allCountries[i]; 581 } 582 return NULL; 583 } 584 585 /* EEPROM rd code to regpair mapping */ 586 static struct country_code_to_enum_rd* 587 ath_regd_find_country_by_rd(int regdmn) 588 { 589 int i; 590 591 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 592 if (allCountries[i].regDmnEnum == regdmn) 593 return &allCountries[i]; 594 } 595 return NULL; 596 } 597 598 /* Returns the map of the EEPROM set RD to a country code */ 599 static u16 ath_regd_get_default_country(u16 rd) 600 { 601 if (rd & COUNTRY_ERD_FLAG) { 602 struct country_code_to_enum_rd *country = NULL; 603 u16 cc = rd & ~COUNTRY_ERD_FLAG; 604 605 country = ath_regd_find_country(cc); 606 if (country != NULL) 607 return cc; 608 } 609 610 return CTRY_DEFAULT; 611 } 612 613 static struct reg_dmn_pair_mapping* 614 ath_get_regpair(int regdmn) 615 { 616 int i; 617 618 if (regdmn == NO_ENUMRD) 619 return NULL; 620 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) { 621 if (regDomainPairs[i].reg_domain == regdmn) 622 return ®DomainPairs[i]; 623 } 624 return NULL; 625 } 626 627 static int 628 ath_regd_init_wiphy(struct ath_regulatory *reg, 629 struct wiphy *wiphy, 630 void (*reg_notifier)(struct wiphy *wiphy, 631 struct regulatory_request *request)) 632 { 633 const struct ieee80211_regdomain *regd; 634 635 wiphy->reg_notifier = reg_notifier; 636 wiphy->regulatory_flags |= REGULATORY_STRICT_REG | 637 REGULATORY_CUSTOM_REG; 638 639 if (ath_is_world_regd(reg)) { 640 /* 641 * Anything applied here (prior to wiphy registration) gets 642 * saved on the wiphy orig_* parameters 643 */ 644 regd = ath_world_regdomain(reg); 645 wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER; 646 } else { 647 /* 648 * This gets applied in the case of the absence of CRDA, 649 * it's our own custom world regulatory domain, similar to 650 * cfg80211's but we enable passive scanning. 651 */ 652 regd = ath_default_world_regdomain(); 653 } 654 655 wiphy_apply_custom_regulatory(wiphy, regd); 656 ath_reg_apply_radar_flags(wiphy); 657 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); 658 return 0; 659 } 660 661 /* 662 * Some users have reported their EEPROM programmed with 663 * 0x8000 set, this is not a supported regulatory domain 664 * but since we have more than one user with it we need 665 * a solution for them. We default to 0x64, which is the 666 * default Atheros world regulatory domain. 667 */ 668 static void ath_regd_sanitize(struct ath_regulatory *reg) 669 { 670 if (reg->current_rd != COUNTRY_ERD_FLAG) 671 return; 672 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n"); 673 reg->current_rd = 0x64; 674 } 675 676 static int __ath_regd_init(struct ath_regulatory *reg) 677 { 678 struct country_code_to_enum_rd *country = NULL; 679 u16 regdmn; 680 681 if (!reg) 682 return -EINVAL; 683 684 ath_regd_sanitize(reg); 685 686 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd); 687 688 if (!ath_regd_is_eeprom_valid(reg)) { 689 pr_err("Invalid EEPROM contents\n"); 690 return -EINVAL; 691 } 692 693 regdmn = ath_regd_get_eepromRD(reg); 694 reg->country_code = ath_regd_get_default_country(regdmn); 695 696 if (reg->country_code == CTRY_DEFAULT && 697 regdmn == CTRY_DEFAULT) { 698 printk(KERN_DEBUG "ath: EEPROM indicates default " 699 "country code should be used\n"); 700 reg->country_code = CTRY_UNITED_STATES; 701 } 702 703 if (reg->country_code == CTRY_DEFAULT) { 704 country = NULL; 705 } else { 706 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn " 707 "map search\n"); 708 country = ath_regd_find_country(reg->country_code); 709 if (country == NULL) { 710 printk(KERN_DEBUG 711 "ath: no valid country maps found for " 712 "country code: 0x%0x\n", 713 reg->country_code); 714 return -EINVAL; 715 } else { 716 regdmn = country->regDmnEnum; 717 printk(KERN_DEBUG "ath: country maps to " 718 "regdmn code: 0x%0x\n", 719 regdmn); 720 } 721 } 722 723 reg->regpair = ath_get_regpair(regdmn); 724 725 if (!reg->regpair) { 726 printk(KERN_DEBUG "ath: " 727 "No regulatory domain pair found, cannot continue\n"); 728 return -EINVAL; 729 } 730 731 if (!country) 732 country = ath_regd_find_country_by_rd(regdmn); 733 734 if (country) { 735 reg->alpha2[0] = country->isoName[0]; 736 reg->alpha2[1] = country->isoName[1]; 737 } else { 738 reg->alpha2[0] = '0'; 739 reg->alpha2[1] = '0'; 740 } 741 742 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n", 743 reg->alpha2[0], reg->alpha2[1]); 744 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n", 745 reg->regpair->reg_domain); 746 747 return 0; 748 } 749 750 int 751 ath_regd_init(struct ath_regulatory *reg, 752 struct wiphy *wiphy, 753 void (*reg_notifier)(struct wiphy *wiphy, 754 struct regulatory_request *request)) 755 { 756 struct ath_common *common = container_of(reg, struct ath_common, 757 regulatory); 758 int r; 759 760 r = __ath_regd_init(reg); 761 if (r) 762 return r; 763 764 if (ath_is_world_regd(reg)) 765 memcpy(&common->reg_world_copy, reg, 766 sizeof(struct ath_regulatory)); 767 768 ath_regd_init_wiphy(reg, wiphy, reg_notifier); 769 770 return 0; 771 } 772 EXPORT_SYMBOL(ath_regd_init); 773 774 u32 ath_regd_get_band_ctl(struct ath_regulatory *reg, 775 enum nl80211_band band) 776 { 777 if (!reg->regpair || 778 (reg->country_code == CTRY_DEFAULT && 779 is_wwr_sku(ath_regd_get_eepromRD(reg)))) { 780 return SD_NO_CTL; 781 } 782 783 if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) { 784 switch (reg->region) { 785 case NL80211_DFS_FCC: 786 return CTL_FCC; 787 case NL80211_DFS_ETSI: 788 return CTL_ETSI; 789 case NL80211_DFS_JP: 790 return CTL_MKK; 791 default: 792 break; 793 } 794 } 795 796 switch (band) { 797 case NL80211_BAND_2GHZ: 798 return reg->regpair->reg_2ghz_ctl; 799 case NL80211_BAND_5GHZ: 800 return reg->regpair->reg_5ghz_ctl; 801 default: 802 return NO_CTL; 803 } 804 } 805 EXPORT_SYMBOL(ath_regd_get_band_ctl); 806