regd.c revision ef8c00174a8738ea334197c0164143354644cb16
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 26static 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 */ 66static 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 */ 76static 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 */ 87static 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 */ 97static 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 */ 107static 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 117static 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 189static 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 198static 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 205static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg) 206{ 207 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG; 208} 209 210bool ath_is_world_regd(struct ath_regulatory *reg) 211{ 212 return is_wwr_sku(ath_regd_get_eepromRD(reg)); 213} 214EXPORT_SYMBOL(ath_is_world_regd); 215 216static const struct ieee80211_regdomain *ath_default_world_regdomain(void) 217{ 218 /* this is the most restrictive */ 219 return &ath_world_regdom_64; 220} 221 222static const struct 223ieee80211_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 249bool ath_is_49ghz_allowed(u16 regdomain) 250{ 251 /* possibly more */ 252 return regdomain == MKK9_MKKC; 253} 254EXPORT_SYMBOL(ath_is_49ghz_allowed); 255 256/* Frequency is one where radar detection is required */ 257static bool ath_is_radar_freq(u16 center_freq) 258{ 259 return (center_freq >= 5260 && center_freq <= 5700); 260} 261 262static 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 276static 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 287static void ath_force_no_ir_chan(struct ieee80211_channel *ch) 288{ 289 ch->flags |= IEEE80211_CHAN_NO_IR; 290} 291 292static 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 303static 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 */ 334static void 335ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 336 struct ath_regulatory *reg, 337 enum nl80211_reg_initiator initiator) 338{ 339 enum ieee80211_band band; 340 struct ieee80211_supported_band *sband; 341 struct ieee80211_channel *ch; 342 unsigned int i; 343 344 for (band = 0; band < IEEE80211_NUM_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 */ 370static void 371ath_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[IEEE80211_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 */ 399static 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[IEEE80211_BAND_5GHZ]) 406 return; 407 408 sband = wiphy->bands[IEEE80211_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 430static 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 452static 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 464static 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 488static 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 501void 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 switch (request->initiator) { 519 case NL80211_REGDOM_SET_BY_CORE: 520 /* 521 * If common->reg_world_copy is world roaming it means we *were* 522 * world roaming... so we now have to restore that data. 523 */ 524 if (!ath_is_world_regd(&common->reg_world_copy)) 525 break; 526 527 memcpy(reg, &common->reg_world_copy, 528 sizeof(struct ath_regulatory)); 529 break; 530 case NL80211_REGDOM_SET_BY_DRIVER: 531 break; 532 case NL80211_REGDOM_SET_BY_USER: 533 if (ath_reg_dyn_country_user_allow(reg)) 534 ath_reg_dyn_country(wiphy, reg, request); 535 break; 536 case NL80211_REGDOM_SET_BY_COUNTRY_IE: 537 ath_reg_dyn_country(wiphy, reg, request); 538 break; 539 } 540} 541EXPORT_SYMBOL(ath_reg_notifier_apply); 542 543static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg) 544{ 545 u16 rd = ath_regd_get_eepromRD(reg); 546 int i; 547 548 if (rd & COUNTRY_ERD_FLAG) { 549 /* EEPROM value is a country code */ 550 u16 cc = rd & ~COUNTRY_ERD_FLAG; 551 printk(KERN_DEBUG 552 "ath: EEPROM indicates we should expect " 553 "a country code\n"); 554 for (i = 0; i < ARRAY_SIZE(allCountries); i++) 555 if (allCountries[i].countryCode == cc) 556 return true; 557 } else { 558 /* EEPROM value is a regpair value */ 559 if (rd != CTRY_DEFAULT) 560 printk(KERN_DEBUG "ath: EEPROM indicates we " 561 "should expect a direct regpair map\n"); 562 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) 563 if (regDomainPairs[i].reg_domain == rd) 564 return true; 565 } 566 printk(KERN_DEBUG 567 "ath: invalid regulatory domain/country code 0x%x\n", rd); 568 return false; 569} 570 571/* EEPROM country code to regpair mapping */ 572static struct country_code_to_enum_rd* 573ath_regd_find_country(u16 countryCode) 574{ 575 int i; 576 577 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 578 if (allCountries[i].countryCode == countryCode) 579 return &allCountries[i]; 580 } 581 return NULL; 582} 583 584/* EEPROM rd code to regpair mapping */ 585static struct country_code_to_enum_rd* 586ath_regd_find_country_by_rd(int regdmn) 587{ 588 int i; 589 590 for (i = 0; i < ARRAY_SIZE(allCountries); i++) { 591 if (allCountries[i].regDmnEnum == regdmn) 592 return &allCountries[i]; 593 } 594 return NULL; 595} 596 597/* Returns the map of the EEPROM set RD to a country code */ 598static u16 ath_regd_get_default_country(u16 rd) 599{ 600 if (rd & COUNTRY_ERD_FLAG) { 601 struct country_code_to_enum_rd *country = NULL; 602 u16 cc = rd & ~COUNTRY_ERD_FLAG; 603 604 country = ath_regd_find_country(cc); 605 if (country != NULL) 606 return cc; 607 } 608 609 return CTRY_DEFAULT; 610} 611 612static struct reg_dmn_pair_mapping* 613ath_get_regpair(int regdmn) 614{ 615 int i; 616 617 if (regdmn == NO_ENUMRD) 618 return NULL; 619 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) { 620 if (regDomainPairs[i].reg_domain == regdmn) 621 return ®DomainPairs[i]; 622 } 623 return NULL; 624} 625 626static int 627ath_regd_init_wiphy(struct ath_regulatory *reg, 628 struct wiphy *wiphy, 629 void (*reg_notifier)(struct wiphy *wiphy, 630 struct regulatory_request *request)) 631{ 632 const struct ieee80211_regdomain *regd; 633 634 wiphy->reg_notifier = reg_notifier; 635 wiphy->regulatory_flags |= REGULATORY_STRICT_REG | 636 REGULATORY_CUSTOM_REG; 637 638 if (ath_is_world_regd(reg)) { 639 /* 640 * Anything applied here (prior to wiphy registration) gets 641 * saved on the wiphy orig_* parameters 642 */ 643 regd = ath_world_regdomain(reg); 644 wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER; 645 } else { 646 /* 647 * This gets applied in the case of the absence of CRDA, 648 * it's our own custom world regulatory domain, similar to 649 * cfg80211's but we enable passive scanning. 650 */ 651 regd = ath_default_world_regdomain(); 652 } 653 654 wiphy_apply_custom_regulatory(wiphy, regd); 655 ath_reg_apply_radar_flags(wiphy); 656 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); 657 return 0; 658} 659 660/* 661 * Some users have reported their EEPROM programmed with 662 * 0x8000 set, this is not a supported regulatory domain 663 * but since we have more than one user with it we need 664 * a solution for them. We default to 0x64, which is the 665 * default Atheros world regulatory domain. 666 */ 667static void ath_regd_sanitize(struct ath_regulatory *reg) 668{ 669 if (reg->current_rd != COUNTRY_ERD_FLAG) 670 return; 671 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n"); 672 reg->current_rd = 0x64; 673} 674 675static int __ath_regd_init(struct ath_regulatory *reg) 676{ 677 struct country_code_to_enum_rd *country = NULL; 678 u16 regdmn; 679 680 if (!reg) 681 return -EINVAL; 682 683 ath_regd_sanitize(reg); 684 685 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd); 686 687 if (!ath_regd_is_eeprom_valid(reg)) { 688 pr_err("Invalid EEPROM contents\n"); 689 return -EINVAL; 690 } 691 692 regdmn = ath_regd_get_eepromRD(reg); 693 reg->country_code = ath_regd_get_default_country(regdmn); 694 695 if (reg->country_code == CTRY_DEFAULT && 696 regdmn == CTRY_DEFAULT) { 697 printk(KERN_DEBUG "ath: EEPROM indicates default " 698 "country code should be used\n"); 699 reg->country_code = CTRY_UNITED_STATES; 700 } 701 702 if (reg->country_code == CTRY_DEFAULT) { 703 country = NULL; 704 } else { 705 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn " 706 "map search\n"); 707 country = ath_regd_find_country(reg->country_code); 708 if (country == NULL) { 709 printk(KERN_DEBUG 710 "ath: no valid country maps found for " 711 "country code: 0x%0x\n", 712 reg->country_code); 713 return -EINVAL; 714 } else { 715 regdmn = country->regDmnEnum; 716 printk(KERN_DEBUG "ath: country maps to " 717 "regdmn code: 0x%0x\n", 718 regdmn); 719 } 720 } 721 722 reg->regpair = ath_get_regpair(regdmn); 723 724 if (!reg->regpair) { 725 printk(KERN_DEBUG "ath: " 726 "No regulatory domain pair found, cannot continue\n"); 727 return -EINVAL; 728 } 729 730 if (!country) 731 country = ath_regd_find_country_by_rd(regdmn); 732 733 if (country) { 734 reg->alpha2[0] = country->isoName[0]; 735 reg->alpha2[1] = country->isoName[1]; 736 } else { 737 reg->alpha2[0] = '0'; 738 reg->alpha2[1] = '0'; 739 } 740 741 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n", 742 reg->alpha2[0], reg->alpha2[1]); 743 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n", 744 reg->regpair->reg_domain); 745 746 return 0; 747} 748 749int 750ath_regd_init(struct ath_regulatory *reg, 751 struct wiphy *wiphy, 752 void (*reg_notifier)(struct wiphy *wiphy, 753 struct regulatory_request *request)) 754{ 755 struct ath_common *common = container_of(reg, struct ath_common, 756 regulatory); 757 int r; 758 759 r = __ath_regd_init(reg); 760 if (r) 761 return r; 762 763 if (ath_is_world_regd(reg)) 764 memcpy(&common->reg_world_copy, reg, 765 sizeof(struct ath_regulatory)); 766 767 ath_regd_init_wiphy(reg, wiphy, reg_notifier); 768 769 return 0; 770} 771EXPORT_SYMBOL(ath_regd_init); 772 773u32 ath_regd_get_band_ctl(struct ath_regulatory *reg, 774 enum ieee80211_band band) 775{ 776 if (!reg->regpair || 777 (reg->country_code == CTRY_DEFAULT && 778 is_wwr_sku(ath_regd_get_eepromRD(reg)))) { 779 return SD_NO_CTL; 780 } 781 782 switch (band) { 783 case IEEE80211_BAND_2GHZ: 784 return reg->regpair->reg_2ghz_ctl; 785 case IEEE80211_BAND_5GHZ: 786 return reg->regpair->reg_5ghz_ctl; 787 default: 788 return NO_CTL; 789 } 790} 791EXPORT_SYMBOL(ath_regd_get_band_ctl); 792