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 ATH_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 ATH_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\ 40 NL80211_RRF_NO_IR) 41 #define ATH_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 ATH_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 80, 0, 30,\ 47 NL80211_RRF_NO_IR) 48 #define ATH_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 80, 0, 30,\ 49 NL80211_RRF_NO_IR) 50 #define ATH_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 80, 0, 30,\ 51 NL80211_RRF_NO_IR) 52 53 #define ATH_2GHZ_ALL ATH_2GHZ_CH01_11, \ 54 ATH_2GHZ_CH12_13, \ 55 ATH_2GHZ_CH14 56 57 #define ATH_5GHZ_ALL ATH_5GHZ_5150_5350, \ 58 ATH_5GHZ_5470_5850 59 60 /* This one skips what we call "mid band" */ 61 #define ATH_5GHZ_NO_MIDBAND ATH_5GHZ_5150_5350, \ 62 ATH_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 ATH_2GHZ_ALL, 71 ATH_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 ATH_2GHZ_CH01_11, 81 ATH_2GHZ_CH12_13, 82 ATH_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 ATH_2GHZ_CH01_11, 92 ATH_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 ATH_2GHZ_CH01_11, 102 ATH_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 ATH_2GHZ_CH01_11, 112 ATH_2GHZ_CH12_13, 113 ATH_5GHZ_ALL, 114 } 115 }; 116 117 static bool dynamic_country_user_possible(struct ath_regulatory *reg) 118 { 119 if (IS_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 (!IS_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 struct ath_regulatory *reg) 259 260 { 261 if (reg->country_code == CTRY_INDIA) 262 return (center_freq >= 5500 && center_freq <= 5700); 263 return (center_freq >= 5260 && center_freq <= 5700); 264 } 265 266 static void ath_force_clear_no_ir_chan(struct wiphy *wiphy, 267 struct ieee80211_channel *ch) 268 { 269 const struct ieee80211_reg_rule *reg_rule; 270 271 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq)); 272 if (IS_ERR(reg_rule)) 273 return; 274 275 if (!(reg_rule->flags & NL80211_RRF_NO_IR)) 276 if (ch->flags & IEEE80211_CHAN_NO_IR) 277 ch->flags &= ~IEEE80211_CHAN_NO_IR; 278 } 279 280 static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq) 281 { 282 struct ieee80211_channel *ch; 283 284 ch = ieee80211_get_channel(wiphy, center_freq); 285 if (!ch) 286 return; 287 288 ath_force_clear_no_ir_chan(wiphy, ch); 289 } 290 291 static void ath_force_no_ir_chan(struct ieee80211_channel *ch) 292 { 293 ch->flags |= IEEE80211_CHAN_NO_IR; 294 } 295 296 static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq) 297 { 298 struct ieee80211_channel *ch; 299 300 ch = ieee80211_get_channel(wiphy, center_freq); 301 if (!ch) 302 return; 303 304 ath_force_no_ir_chan(ch); 305 } 306 307 static void 308 __ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 309 struct ath_regulatory *reg, 310 enum nl80211_reg_initiator initiator, 311 struct ieee80211_channel *ch) 312 { 313 if (ath_is_radar_freq(ch->center_freq, reg) || 314 (ch->flags & IEEE80211_CHAN_RADAR)) 315 return; 316 317 switch (initiator) { 318 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 319 ath_force_clear_no_ir_chan(wiphy, ch); 320 break; 321 case NL80211_REGDOM_SET_BY_USER: 322 if (ath_reg_dyn_country_user_allow(reg)) 323 ath_force_clear_no_ir_chan(wiphy, ch); 324 break; 325 default: 326 if (ch->beacon_found) 327 ch->flags &= ~IEEE80211_CHAN_NO_IR; 328 } 329 } 330 331 /* 332 * These exception rules do not apply radar frequencies. 333 * 334 * - We enable initiating radiation if the country IE says its fine: 335 * - If no country IE has been processed and a we determine we have 336 * received a beacon on a channel we can enable initiating radiation. 337 */ 338 static void 339 ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 340 struct ath_regulatory *reg, 341 enum nl80211_reg_initiator initiator) 342 { 343 enum nl80211_band band; 344 struct ieee80211_supported_band *sband; 345 struct ieee80211_channel *ch; 346 unsigned int i; 347 348 for (band = 0; band < NUM_NL80211_BANDS; band++) { 349 if (!wiphy->bands[band]) 350 continue; 351 sband = wiphy->bands[band]; 352 for (i = 0; i < sband->n_channels; i++) { 353 ch = &sband->channels[i]; 354 __ath_reg_apply_beaconing_flags(wiphy, reg, 355 initiator, ch); 356 } 357 } 358 } 359 360 /** 361 * ath_reg_apply_ir_flags() 362 * @wiphy: the wiphy to use 363 * @reg: regulatory structure - used for country selection 364 * @initiator: the regulatory hint initiator 365 * 366 * If no country IE has been received always enable passive scan 367 * and no-ibss on these channels. This is only done for specific 368 * regulatory SKUs. 369 * 370 * If a country IE has been received check its rule for this 371 * channel first before enabling active scan. The passive scan 372 * would have been enforced by the initial processing of our 373 * custom regulatory domain. 374 */ 375 static void 376 ath_reg_apply_ir_flags(struct wiphy *wiphy, 377 struct ath_regulatory *reg, 378 enum nl80211_reg_initiator initiator) 379 { 380 struct ieee80211_supported_band *sband; 381 382 sband = wiphy->bands[NL80211_BAND_2GHZ]; 383 if (!sband) 384 return; 385 386 switch(initiator) { 387 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 388 ath_force_clear_no_ir_freq(wiphy, 2467); 389 ath_force_clear_no_ir_freq(wiphy, 2472); 390 break; 391 case NL80211_REGDOM_SET_BY_USER: 392 if (!ath_reg_dyn_country_user_allow(reg)) 393 break; 394 ath_force_clear_no_ir_freq(wiphy, 2467); 395 ath_force_clear_no_ir_freq(wiphy, 2472); 396 break; 397 default: 398 ath_force_no_ir_freq(wiphy, 2467); 399 ath_force_no_ir_freq(wiphy, 2472); 400 } 401 } 402 403 /* Always apply Radar/DFS rules on freq range 5500 MHz - 5700 MHz */ 404 static void ath_reg_apply_radar_flags(struct wiphy *wiphy, 405 struct ath_regulatory *reg) 406 { 407 struct ieee80211_supported_band *sband; 408 struct ieee80211_channel *ch; 409 unsigned int i; 410 411 if (!wiphy->bands[NL80211_BAND_5GHZ]) 412 return; 413 414 sband = wiphy->bands[NL80211_BAND_5GHZ]; 415 416 for (i = 0; i < sband->n_channels; i++) { 417 ch = &sband->channels[i]; 418 if (!ath_is_radar_freq(ch->center_freq, reg)) 419 continue; 420 /* We always enable radar detection/DFS on this 421 * frequency range. Additionally we also apply on 422 * this frequency range: 423 * - If STA mode does not yet have DFS supports disable 424 * active scanning 425 * - If adhoc mode does not support DFS yet then 426 * disable adhoc in the frequency. 427 * - If AP mode does not yet support radar detection/DFS 428 * do not allow AP mode 429 */ 430 if (!(ch->flags & IEEE80211_CHAN_DISABLED)) 431 ch->flags |= IEEE80211_CHAN_RADAR | 432 IEEE80211_CHAN_NO_IR; 433 } 434 } 435 436 static void ath_reg_apply_world_flags(struct wiphy *wiphy, 437 enum nl80211_reg_initiator initiator, 438 struct ath_regulatory *reg) 439 { 440 switch (reg->regpair->reg_domain) { 441 case 0x60: 442 case 0x63: 443 case 0x66: 444 case 0x67: 445 case 0x6C: 446 ath_reg_apply_beaconing_flags(wiphy, reg, initiator); 447 break; 448 case 0x68: 449 ath_reg_apply_beaconing_flags(wiphy, reg, initiator); 450 ath_reg_apply_ir_flags(wiphy, reg, initiator); 451 break; 452 default: 453 if (ath_reg_dyn_country_user_allow(reg)) 454 ath_reg_apply_beaconing_flags(wiphy, reg, initiator); 455 } 456 } 457 458 u16 ath_regd_find_country_by_name(char *alpha2) 459 { 460 unsigned int i; 461 462 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 463 if (!memcmp(allCountries[i].isoName, alpha2, 2)) 464 return allCountries[i].countryCode; 465 } 466 467 return -1; 468 } 469 EXPORT_SYMBOL(ath_regd_find_country_by_name); 470 471 static int __ath_reg_dyn_country(struct wiphy *wiphy, 472 struct ath_regulatory *reg, 473 struct regulatory_request *request) 474 { 475 u16 country_code; 476 477 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 478 !ath_is_world_regd(reg)) 479 return -EINVAL; 480 481 country_code = ath_regd_find_country_by_name(request->alpha2); 482 if (country_code == (u16) -1) 483 return -EINVAL; 484 485 reg->current_rd = COUNTRY_ERD_FLAG; 486 reg->current_rd |= country_code; 487 488 __ath_regd_init(reg); 489 490 ath_reg_apply_world_flags(wiphy, request->initiator, reg); 491 492 return 0; 493 } 494 495 static void ath_reg_dyn_country(struct wiphy *wiphy, 496 struct ath_regulatory *reg, 497 struct regulatory_request *request) 498 { 499 if (__ath_reg_dyn_country(wiphy, reg, request)) 500 return; 501 502 printk(KERN_DEBUG "ath: regdomain 0x%0x " 503 "dynamically updated by %s\n", 504 reg->current_rd, 505 reg_initiator_name(request->initiator)); 506 } 507 508 void ath_reg_notifier_apply(struct wiphy *wiphy, 509 struct regulatory_request *request, 510 struct ath_regulatory *reg) 511 { 512 struct ath_common *common = container_of(reg, struct ath_common, 513 regulatory); 514 /* We always apply this */ 515 ath_reg_apply_radar_flags(wiphy, reg); 516 517 /* 518 * This would happen when we have sent a custom regulatory request 519 * a world regulatory domain and the scheduler hasn't yet processed 520 * any pending requests in the queue. 521 */ 522 if (!request) 523 return; 524 525 reg->region = request->dfs_region; 526 switch (request->initiator) { 527 case NL80211_REGDOM_SET_BY_CORE: 528 /* 529 * If common->reg_world_copy is world roaming it means we *were* 530 * world roaming... so we now have to restore that data. 531 */ 532 if (!ath_is_world_regd(&common->reg_world_copy)) 533 break; 534 535 memcpy(reg, &common->reg_world_copy, 536 sizeof(struct ath_regulatory)); 537 break; 538 case NL80211_REGDOM_SET_BY_DRIVER: 539 break; 540 case NL80211_REGDOM_SET_BY_USER: 541 if (ath_reg_dyn_country_user_allow(reg)) 542 ath_reg_dyn_country(wiphy, reg, request); 543 break; 544 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 545 ath_reg_dyn_country(wiphy, reg, request); 546 break; 547 } 548 } 549 EXPORT_SYMBOL(ath_reg_notifier_apply); 550 551 static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg) 552 { 553 u16 rd = ath_regd_get_eepromRD(reg); 554 int i; 555 556 if (rd & COUNTRY_ERD_FLAG) { 557 /* EEPROM value is a country code */ 558 u16 cc = rd & ~COUNTRY_ERD_FLAG; 559 printk(KERN_DEBUG 560 "ath: EEPROM indicates we should expect " 561 "a country code\n"); 562 for (i = 0; i < ARRAY_SIZE(allCountries); i++) 563 if (allCountries[i].countryCode == cc) 564 return true; 565 } else { 566 /* EEPROM value is a regpair value */ 567 if (rd != CTRY_DEFAULT) 568 printk(KERN_DEBUG "ath: EEPROM indicates we " 569 "should expect a direct regpair map\n"); 570 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) 571 if (regDomainPairs[i].reg_domain == rd) 572 return true; 573 } 574 printk(KERN_DEBUG 575 "ath: invalid regulatory domain/country code 0x%x\n", rd); 576 return false; 577 } 578 579 /* EEPROM country code to regpair mapping */ 580 static struct country_code_to_enum_rd* 581 ath_regd_find_country(u16 countryCode) 582 { 583 int i; 584 585 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 586 if (allCountries[i].countryCode == countryCode) 587 return &allCountries[i]; 588 } 589 return NULL; 590 } 591 592 /* EEPROM rd code to regpair mapping */ 593 static struct country_code_to_enum_rd* 594 ath_regd_find_country_by_rd(int regdmn) 595 { 596 int i; 597 598 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 599 if (allCountries[i].regDmnEnum == regdmn) 600 return &allCountries[i]; 601 } 602 return NULL; 603 } 604 605 /* Returns the map of the EEPROM set RD to a country code */ 606 static u16 ath_regd_get_default_country(u16 rd) 607 { 608 if (rd & COUNTRY_ERD_FLAG) { 609 struct country_code_to_enum_rd *country = NULL; 610 u16 cc = rd & ~COUNTRY_ERD_FLAG; 611 612 country = ath_regd_find_country(cc); 613 if (country != NULL) 614 return cc; 615 } 616 617 return CTRY_DEFAULT; 618 } 619 620 static struct reg_dmn_pair_mapping* 621 ath_get_regpair(int regdmn) 622 { 623 int i; 624 625 if (regdmn == NO_ENUMRD) 626 return NULL; 627 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) { 628 if (regDomainPairs[i].reg_domain == regdmn) 629 return ®DomainPairs[i]; 630 } 631 return NULL; 632 } 633 634 static int 635 ath_regd_init_wiphy(struct ath_regulatory *reg, 636 struct wiphy *wiphy, 637 void (*reg_notifier)(struct wiphy *wiphy, 638 struct regulatory_request *request)) 639 { 640 const struct ieee80211_regdomain *regd; 641 642 wiphy->reg_notifier = reg_notifier; 643 wiphy->regulatory_flags |= REGULATORY_STRICT_REG | 644 REGULATORY_CUSTOM_REG; 645 646 if (ath_is_world_regd(reg)) { 647 /* 648 * Anything applied here (prior to wiphy registration) gets 649 * saved on the wiphy orig_* parameters 650 */ 651 regd = ath_world_regdomain(reg); 652 wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER; 653 } else { 654 /* 655 * This gets applied in the case of the absence of CRDA, 656 * it's our own custom world regulatory domain, similar to 657 * cfg80211's but we enable passive scanning. 658 */ 659 regd = ath_default_world_regdomain(); 660 } 661 662 wiphy_apply_custom_regulatory(wiphy, regd); 663 ath_reg_apply_radar_flags(wiphy, reg); 664 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); 665 return 0; 666 } 667 668 /* 669 * Some users have reported their EEPROM programmed with 670 * 0x8000 set, this is not a supported regulatory domain 671 * but since we have more than one user with it we need 672 * a solution for them. We default to 0x64, which is the 673 * default Atheros world regulatory domain. 674 */ 675 static void ath_regd_sanitize(struct ath_regulatory *reg) 676 { 677 if (reg->current_rd != COUNTRY_ERD_FLAG) 678 return; 679 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n"); 680 reg->current_rd = 0x64; 681 } 682 683 static int __ath_regd_init(struct ath_regulatory *reg) 684 { 685 struct country_code_to_enum_rd *country = NULL; 686 u16 regdmn; 687 688 if (!reg) 689 return -EINVAL; 690 691 ath_regd_sanitize(reg); 692 693 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd); 694 695 if (!ath_regd_is_eeprom_valid(reg)) { 696 pr_err("Invalid EEPROM contents\n"); 697 return -EINVAL; 698 } 699 700 regdmn = ath_regd_get_eepromRD(reg); 701 reg->country_code = ath_regd_get_default_country(regdmn); 702 703 if (reg->country_code == CTRY_DEFAULT && 704 regdmn == CTRY_DEFAULT) { 705 printk(KERN_DEBUG "ath: EEPROM indicates default " 706 "country code should be used\n"); 707 reg->country_code = CTRY_UNITED_STATES; 708 } 709 710 if (reg->country_code == CTRY_DEFAULT) { 711 country = NULL; 712 } else { 713 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn " 714 "map search\n"); 715 country = ath_regd_find_country(reg->country_code); 716 if (country == NULL) { 717 printk(KERN_DEBUG 718 "ath: no valid country maps found for " 719 "country code: 0x%0x\n", 720 reg->country_code); 721 return -EINVAL; 722 } else { 723 regdmn = country->regDmnEnum; 724 printk(KERN_DEBUG "ath: country maps to " 725 "regdmn code: 0x%0x\n", 726 regdmn); 727 } 728 } 729 730 reg->regpair = ath_get_regpair(regdmn); 731 732 if (!reg->regpair) { 733 printk(KERN_DEBUG "ath: " 734 "No regulatory domain pair found, cannot continue\n"); 735 return -EINVAL; 736 } 737 738 if (!country) 739 country = ath_regd_find_country_by_rd(regdmn); 740 741 if (country) { 742 reg->alpha2[0] = country->isoName[0]; 743 reg->alpha2[1] = country->isoName[1]; 744 } else { 745 reg->alpha2[0] = '0'; 746 reg->alpha2[1] = '0'; 747 } 748 749 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n", 750 reg->alpha2[0], reg->alpha2[1]); 751 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n", 752 reg->regpair->reg_domain); 753 754 return 0; 755 } 756 757 int 758 ath_regd_init(struct ath_regulatory *reg, 759 struct wiphy *wiphy, 760 void (*reg_notifier)(struct wiphy *wiphy, 761 struct regulatory_request *request)) 762 { 763 struct ath_common *common = container_of(reg, struct ath_common, 764 regulatory); 765 int r; 766 767 r = __ath_regd_init(reg); 768 if (r) 769 return r; 770 771 if (ath_is_world_regd(reg)) 772 memcpy(&common->reg_world_copy, reg, 773 sizeof(struct ath_regulatory)); 774 775 ath_regd_init_wiphy(reg, wiphy, reg_notifier); 776 777 return 0; 778 } 779 EXPORT_SYMBOL(ath_regd_init); 780 781 u32 ath_regd_get_band_ctl(struct ath_regulatory *reg, 782 enum nl80211_band band) 783 { 784 if (!reg->regpair || 785 (reg->country_code == CTRY_DEFAULT && 786 is_wwr_sku(ath_regd_get_eepromRD(reg)))) { 787 return SD_NO_CTL; 788 } 789 790 if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) { 791 switch (reg->region) { 792 case NL80211_DFS_FCC: 793 return CTL_FCC; 794 case NL80211_DFS_ETSI: 795 return CTL_ETSI; 796 case NL80211_DFS_JP: 797 return CTL_MKK; 798 default: 799 break; 800 } 801 } 802 803 switch (band) { 804 case NL80211_BAND_2GHZ: 805 return reg->regpair->reg_2ghz_ctl; 806 case NL80211_BAND_5GHZ: 807 return reg->regpair->reg_5ghz_ctl; 808 default: 809 return NO_CTL; 810 } 811 } 812 EXPORT_SYMBOL(ath_regd_get_band_ctl); 813