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, 40, 0, 30,\ 46 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) 47 #define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\ 48 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) 49 #define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 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 u32 bandwidth = 0; 199 int r; 200 201 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 202 203 if (!wiphy->bands[band]) 204 continue; 205 206 sband = wiphy->bands[band]; 207 208 for (i = 0; i < sband->n_channels; i++) { 209 210 ch = &sband->channels[i]; 211 212 if (ath_is_radar_freq(ch->center_freq) || 213 (ch->flags & IEEE80211_CHAN_RADAR)) 214 continue; 215 216 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 217 r = freq_reg_info(wiphy, 218 ch->center_freq, 219 bandwidth, 220 ®_rule); 221 if (r) 222 continue; 223 /* 224 * If 11d had a rule for this channel ensure 225 * we enable adhoc/beaconing if it allows us to 226 * use it. Note that we would have disabled it 227 * by applying our static world regdomain by 228 * default during init, prior to calling our 229 * regulatory_hint(). 230 */ 231 if (!(reg_rule->flags & 232 NL80211_RRF_NO_IBSS)) 233 ch->flags &= 234 ~IEEE80211_CHAN_NO_IBSS; 235 if (!(reg_rule->flags & 236 NL80211_RRF_PASSIVE_SCAN)) 237 ch->flags &= 238 ~IEEE80211_CHAN_PASSIVE_SCAN; 239 } else { 240 if (ch->beacon_found) 241 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS | 242 IEEE80211_CHAN_PASSIVE_SCAN); 243 } 244 } 245 } 246 247 } 248 249 /* Allows active scan scan on Ch 12 and 13 */ 250 static void 251 ath_reg_apply_active_scan_flags(struct wiphy *wiphy, 252 enum nl80211_reg_initiator initiator) 253 { 254 struct ieee80211_supported_band *sband; 255 struct ieee80211_channel *ch; 256 const struct ieee80211_reg_rule *reg_rule; 257 u32 bandwidth = 0; 258 int r; 259 260 sband = wiphy->bands[IEEE80211_BAND_2GHZ]; 261 if (!sband) 262 return; 263 264 /* 265 * If no country IE has been received always enable active scan 266 * on these channels. This is only done for specific regulatory SKUs 267 */ 268 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 269 ch = &sband->channels[11]; /* CH 12 */ 270 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 271 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 272 ch = &sband->channels[12]; /* CH 13 */ 273 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 274 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 275 return; 276 } 277 278 /* 279 * If a country IE has been received check its rule for this 280 * channel first before enabling active scan. The passive scan 281 * would have been enforced by the initial processing of our 282 * custom regulatory domain. 283 */ 284 285 ch = &sband->channels[11]; /* CH 12 */ 286 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule); 287 if (!r) { 288 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) 289 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 290 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 291 } 292 293 ch = &sband->channels[12]; /* CH 13 */ 294 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule); 295 if (!r) { 296 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) 297 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 298 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 299 } 300 } 301 302 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */ 303 static void ath_reg_apply_radar_flags(struct wiphy *wiphy) 304 { 305 struct ieee80211_supported_band *sband; 306 struct ieee80211_channel *ch; 307 unsigned int i; 308 309 if (!wiphy->bands[IEEE80211_BAND_5GHZ]) 310 return; 311 312 sband = wiphy->bands[IEEE80211_BAND_5GHZ]; 313 314 for (i = 0; i < sband->n_channels; i++) { 315 ch = &sband->channels[i]; 316 if (!ath_is_radar_freq(ch->center_freq)) 317 continue; 318 /* We always enable radar detection/DFS on this 319 * frequency range. Additionally we also apply on 320 * this frequency range: 321 * - If STA mode does not yet have DFS supports disable 322 * active scanning 323 * - If adhoc mode does not support DFS yet then 324 * disable adhoc in the frequency. 325 * - If AP mode does not yet support radar detection/DFS 326 * do not allow AP mode 327 */ 328 if (!(ch->flags & IEEE80211_CHAN_DISABLED)) 329 ch->flags |= IEEE80211_CHAN_RADAR | 330 IEEE80211_CHAN_NO_IBSS | 331 IEEE80211_CHAN_PASSIVE_SCAN; 332 } 333 } 334 335 static void ath_reg_apply_world_flags(struct wiphy *wiphy, 336 enum nl80211_reg_initiator initiator, 337 struct ath_regulatory *reg) 338 { 339 switch (reg->regpair->regDmnEnum) { 340 case 0x60: 341 case 0x63: 342 case 0x66: 343 case 0x67: 344 case 0x6C: 345 ath_reg_apply_beaconing_flags(wiphy, initiator); 346 break; 347 case 0x68: 348 ath_reg_apply_beaconing_flags(wiphy, initiator); 349 ath_reg_apply_active_scan_flags(wiphy, initiator); 350 break; 351 } 352 } 353 354 static u16 ath_regd_find_country_by_name(char *alpha2) 355 { 356 unsigned int i; 357 358 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 359 if (!memcmp(allCountries[i].isoName, alpha2, 2)) 360 return allCountries[i].countryCode; 361 } 362 363 return -1; 364 } 365 366 int ath_reg_notifier_apply(struct wiphy *wiphy, 367 struct regulatory_request *request, 368 struct ath_regulatory *reg) 369 { 370 struct ath_common *common = container_of(reg, struct ath_common, 371 regulatory); 372 u16 country_code; 373 374 /* We always apply this */ 375 ath_reg_apply_radar_flags(wiphy); 376 377 /* 378 * This would happen when we have sent a custom regulatory request 379 * a world regulatory domain and the scheduler hasn't yet processed 380 * any pending requests in the queue. 381 */ 382 if (!request) 383 return 0; 384 385 switch (request->initiator) { 386 case NL80211_REGDOM_SET_BY_CORE: 387 /* 388 * If common->reg_world_copy is world roaming it means we *were* 389 * world roaming... so we now have to restore that data. 390 */ 391 if (!ath_is_world_regd(&common->reg_world_copy)) 392 break; 393 394 memcpy(reg, &common->reg_world_copy, 395 sizeof(struct ath_regulatory)); 396 break; 397 case NL80211_REGDOM_SET_BY_DRIVER: 398 case NL80211_REGDOM_SET_BY_USER: 399 break; 400 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 401 if (!ath_is_world_regd(reg)) 402 break; 403 404 country_code = ath_regd_find_country_by_name(request->alpha2); 405 if (country_code == (u16) -1) 406 break; 407 408 reg->current_rd = COUNTRY_ERD_FLAG; 409 reg->current_rd |= country_code; 410 411 printk(KERN_DEBUG "ath: regdomain 0x%0x updated by CountryIE\n", 412 reg->current_rd); 413 __ath_regd_init(reg); 414 415 ath_reg_apply_world_flags(wiphy, request->initiator, reg); 416 417 break; 418 } 419 420 return 0; 421 } 422 EXPORT_SYMBOL(ath_reg_notifier_apply); 423 424 static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg) 425 { 426 u16 rd = ath_regd_get_eepromRD(reg); 427 int i; 428 429 if (rd & COUNTRY_ERD_FLAG) { 430 /* EEPROM value is a country code */ 431 u16 cc = rd & ~COUNTRY_ERD_FLAG; 432 printk(KERN_DEBUG 433 "ath: EEPROM indicates we should expect " 434 "a country code\n"); 435 for (i = 0; i < ARRAY_SIZE(allCountries); i++) 436 if (allCountries[i].countryCode == cc) 437 return true; 438 } else { 439 /* EEPROM value is a regpair value */ 440 if (rd != CTRY_DEFAULT) 441 printk(KERN_DEBUG "ath: EEPROM indicates we " 442 "should expect a direct regpair map\n"); 443 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) 444 if (regDomainPairs[i].regDmnEnum == rd) 445 return true; 446 } 447 printk(KERN_DEBUG 448 "ath: invalid regulatory domain/country code 0x%x\n", rd); 449 return false; 450 } 451 452 /* EEPROM country code to regpair mapping */ 453 static struct country_code_to_enum_rd* 454 ath_regd_find_country(u16 countryCode) 455 { 456 int i; 457 458 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 459 if (allCountries[i].countryCode == countryCode) 460 return &allCountries[i]; 461 } 462 return NULL; 463 } 464 465 /* EEPROM rd code to regpair mapping */ 466 static struct country_code_to_enum_rd* 467 ath_regd_find_country_by_rd(int regdmn) 468 { 469 int i; 470 471 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 472 if (allCountries[i].regDmnEnum == regdmn) 473 return &allCountries[i]; 474 } 475 return NULL; 476 } 477 478 /* Returns the map of the EEPROM set RD to a country code */ 479 static u16 ath_regd_get_default_country(u16 rd) 480 { 481 if (rd & COUNTRY_ERD_FLAG) { 482 struct country_code_to_enum_rd *country = NULL; 483 u16 cc = rd & ~COUNTRY_ERD_FLAG; 484 485 country = ath_regd_find_country(cc); 486 if (country != NULL) 487 return cc; 488 } 489 490 return CTRY_DEFAULT; 491 } 492 493 static struct reg_dmn_pair_mapping* 494 ath_get_regpair(int regdmn) 495 { 496 int i; 497 498 if (regdmn == NO_ENUMRD) 499 return NULL; 500 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) { 501 if (regDomainPairs[i].regDmnEnum == regdmn) 502 return ®DomainPairs[i]; 503 } 504 return NULL; 505 } 506 507 static int 508 ath_regd_init_wiphy(struct ath_regulatory *reg, 509 struct wiphy *wiphy, 510 int (*reg_notifier)(struct wiphy *wiphy, 511 struct regulatory_request *request)) 512 { 513 const struct ieee80211_regdomain *regd; 514 515 wiphy->reg_notifier = reg_notifier; 516 wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY; 517 518 if (ath_is_world_regd(reg)) { 519 /* 520 * Anything applied here (prior to wiphy registration) gets 521 * saved on the wiphy orig_* parameters 522 */ 523 regd = ath_world_regdomain(reg); 524 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; 525 } else { 526 /* 527 * This gets applied in the case of the absence of CRDA, 528 * it's our own custom world regulatory domain, similar to 529 * cfg80211's but we enable passive scanning. 530 */ 531 regd = ath_default_world_regdomain(); 532 } 533 wiphy_apply_custom_regulatory(wiphy, regd); 534 ath_reg_apply_radar_flags(wiphy); 535 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); 536 return 0; 537 } 538 539 /* 540 * Some users have reported their EEPROM programmed with 541 * 0x8000 set, this is not a supported regulatory domain 542 * but since we have more than one user with it we need 543 * a solution for them. We default to 0x64, which is the 544 * default Atheros world regulatory domain. 545 */ 546 static void ath_regd_sanitize(struct ath_regulatory *reg) 547 { 548 if (reg->current_rd != COUNTRY_ERD_FLAG) 549 return; 550 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n"); 551 reg->current_rd = 0x64; 552 } 553 554 static int __ath_regd_init(struct ath_regulatory *reg) 555 { 556 struct country_code_to_enum_rd *country = NULL; 557 u16 regdmn; 558 559 if (!reg) 560 return -EINVAL; 561 562 ath_regd_sanitize(reg); 563 564 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd); 565 566 if (!ath_regd_is_eeprom_valid(reg)) { 567 pr_err("Invalid EEPROM contents\n"); 568 return -EINVAL; 569 } 570 571 regdmn = ath_regd_get_eepromRD(reg); 572 reg->country_code = ath_regd_get_default_country(regdmn); 573 574 if (reg->country_code == CTRY_DEFAULT && 575 regdmn == CTRY_DEFAULT) { 576 printk(KERN_DEBUG "ath: EEPROM indicates default " 577 "country code should be used\n"); 578 reg->country_code = CTRY_UNITED_STATES; 579 } 580 581 if (reg->country_code == CTRY_DEFAULT) { 582 country = NULL; 583 } else { 584 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn " 585 "map search\n"); 586 country = ath_regd_find_country(reg->country_code); 587 if (country == NULL) { 588 printk(KERN_DEBUG 589 "ath: no valid country maps found for " 590 "country code: 0x%0x\n", 591 reg->country_code); 592 return -EINVAL; 593 } else { 594 regdmn = country->regDmnEnum; 595 printk(KERN_DEBUG "ath: country maps to " 596 "regdmn code: 0x%0x\n", 597 regdmn); 598 } 599 } 600 601 reg->regpair = ath_get_regpair(regdmn); 602 603 if (!reg->regpair) { 604 printk(KERN_DEBUG "ath: " 605 "No regulatory domain pair found, cannot continue\n"); 606 return -EINVAL; 607 } 608 609 if (!country) 610 country = ath_regd_find_country_by_rd(regdmn); 611 612 if (country) { 613 reg->alpha2[0] = country->isoName[0]; 614 reg->alpha2[1] = country->isoName[1]; 615 } else { 616 reg->alpha2[0] = '0'; 617 reg->alpha2[1] = '0'; 618 } 619 620 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n", 621 reg->alpha2[0], reg->alpha2[1]); 622 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n", 623 reg->regpair->regDmnEnum); 624 625 return 0; 626 } 627 628 int 629 ath_regd_init(struct ath_regulatory *reg, 630 struct wiphy *wiphy, 631 int (*reg_notifier)(struct wiphy *wiphy, 632 struct regulatory_request *request)) 633 { 634 struct ath_common *common = container_of(reg, struct ath_common, 635 regulatory); 636 int r; 637 638 r = __ath_regd_init(reg); 639 if (r) 640 return r; 641 642 if (ath_is_world_regd(reg)) 643 memcpy(&common->reg_world_copy, reg, 644 sizeof(struct ath_regulatory)); 645 646 ath_regd_init_wiphy(reg, wiphy, reg_notifier); 647 648 return 0; 649 } 650 EXPORT_SYMBOL(ath_regd_init); 651 652 u32 ath_regd_get_band_ctl(struct ath_regulatory *reg, 653 enum ieee80211_band band) 654 { 655 if (!reg->regpair || 656 (reg->country_code == CTRY_DEFAULT && 657 is_wwr_sku(ath_regd_get_eepromRD(reg)))) { 658 return SD_NO_CTL; 659 } 660 661 switch (band) { 662 case IEEE80211_BAND_2GHZ: 663 return reg->regpair->reg_2ghz_ctl; 664 case IEEE80211_BAND_5GHZ: 665 return reg->regpair->reg_5ghz_ctl; 666 default: 667 return NO_CTL; 668 } 669 } 670 EXPORT_SYMBOL(ath_regd_get_band_ctl); 671