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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#include <linux/kernel.h>
18#include <net/cfg80211.h>
19#include <net/mac80211.h>
20#include "regd.h"
21#include "regd_common.h"
22
23/*
24 * This is a set of common rules used by our world regulatory domains.
25 * We have 12 world regulatory domains. To save space we consolidate
26 * the regulatory domains in 5 structures by frequency and change
27 * the flags on our reg_notifier() on a case by case basis.
28 */
29
30/* Only these channels all allow active scan on all world regulatory domains */
31#define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
32
33/* We enable active scan on these a case by case basis by regulatory domain */
34#define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
35 NL80211_RRF_PASSIVE_SCAN)
36#define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
37 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
38
39/* We allow IBSS on these on a case by case basis by regulatory domain */
40#define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
41 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
42#define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
43 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
44#define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
45 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
46
47#define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
48 ATH9K_2GHZ_CH12_13, \
49 ATH9K_2GHZ_CH14
50
51#define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
52 ATH9K_5GHZ_5470_5850
53
54/* This one skips what we call "mid band" */
55#define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
56 ATH9K_5GHZ_5725_5850
57
58/* Can be used for:
59 * 0x60, 0x61, 0x62 */
60static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = {
61 .n_reg_rules = 5,
62 .alpha2 = "99",
63 .reg_rules = {
64 ATH9K_2GHZ_ALL,
65 ATH9K_5GHZ_ALL,
66 }
67};
68
69/* Can be used by 0x63 and 0x65 */
70static const struct ieee80211_regdomain ath_world_regdom_63_65 = {
71 .n_reg_rules = 4,
72 .alpha2 = "99",
73 .reg_rules = {
74 ATH9K_2GHZ_CH01_11,
75 ATH9K_2GHZ_CH12_13,
76 ATH9K_5GHZ_NO_MIDBAND,
77 }
78};
79
80/* Can be used by 0x64 only */
81static const struct ieee80211_regdomain ath_world_regdom_64 = {
82 .n_reg_rules = 3,
83 .alpha2 = "99",
84 .reg_rules = {
85 ATH9K_2GHZ_CH01_11,
86 ATH9K_5GHZ_NO_MIDBAND,
87 }
88};
89
90/* Can be used by 0x66 and 0x69 */
91static const struct ieee80211_regdomain ath_world_regdom_66_69 = {
92 .n_reg_rules = 3,
93 .alpha2 = "99",
94 .reg_rules = {
95 ATH9K_2GHZ_CH01_11,
96 ATH9K_5GHZ_ALL,
97 }
98};
99
100/* Can be used by 0x67, 0x68, 0x6A and 0x6C */
101static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = {
102 .n_reg_rules = 4,
103 .alpha2 = "99",
104 .reg_rules = {
105 ATH9K_2GHZ_CH01_11,
106 ATH9K_2GHZ_CH12_13,
107 ATH9K_5GHZ_ALL,
108 }
109};
110
111static inline bool is_wwr_sku(u16 regd)
112{
113 return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
114 (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
115 (regd == WORLD));
116}
117
118static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
119{
120 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
121}
122
123bool ath_is_world_regd(struct ath_regulatory *reg)
124{
125 return is_wwr_sku(ath_regd_get_eepromRD(reg));
126}
127EXPORT_SYMBOL(ath_is_world_regd);
128
129static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
130{
131 /* this is the most restrictive */
132 return &ath_world_regdom_64;
133}
134
135static const struct
136ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
137{
138 switch (reg->regpair->regDmnEnum) {
139 case 0x60:
140 case 0x61:
141 case 0x62:
142 return &ath_world_regdom_60_61_62;
143 case 0x63:
144 case 0x65:
145 return &ath_world_regdom_63_65;
146 case 0x64:
147 return &ath_world_regdom_64;
148 case 0x66:
149 case 0x69:
150 return &ath_world_regdom_66_69;
151 case 0x67:
152 case 0x68:
153 case 0x6A:
154 case 0x6C:
155 return &ath_world_regdom_67_68_6A_6C;
156 default:
157 WARN_ON(1);
158 return ath_default_world_regdomain();
159 }
160}
161
162bool ath_is_49ghz_allowed(u16 regdomain)
163{
164 /* possibly more */
165 return regdomain == MKK9_MKKC;
166}
167EXPORT_SYMBOL(ath_is_49ghz_allowed);
168
169/* Frequency is one where radar detection is required */
170static bool ath_is_radar_freq(u16 center_freq)
171{
172 return (center_freq >= 5260 && center_freq <= 5700);
173}
174
175/*
176 * N.B: These exception rules do not apply radar freqs.
177 *
178 * - We enable adhoc (or beaconing) if allowed by 11d
179 * - We enable active scan if the channel is allowed by 11d
180 * - If no country IE has been processed and a we determine we have
181 * received a beacon on a channel we can enable active scan and
182 * adhoc (or beaconing).
183 */
184static void
185ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
186 enum nl80211_reg_initiator initiator)
187{
188 enum ieee80211_band band;
189 struct ieee80211_supported_band *sband;
190 const struct ieee80211_reg_rule *reg_rule;
191 struct ieee80211_channel *ch;
192 unsigned int i;
193 u32 bandwidth = 0;
194 int r;
195
196 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
197
198 if (!wiphy->bands[band])
199 continue;
200
201 sband = wiphy->bands[band];
202
203 for (i = 0; i < sband->n_channels; i++) {
204
205 ch = &sband->channels[i];
206
207 if (ath_is_radar_freq(ch->center_freq) ||
208 (ch->flags & IEEE80211_CHAN_RADAR))
209 continue;
210
211 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
212 r = freq_reg_info(wiphy,
213 ch->center_freq,
214 bandwidth,
215 ®_rule);
216 if (r)
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 */
245static void
246ath_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 u32 bandwidth = 0;
253 int r;
254
255 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
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 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
280 if (!r) {
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 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
288 if (!r) {
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 */
296static 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
328static 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
347int ath_reg_notifier_apply(struct wiphy *wiphy,
348 struct regulatory_request *request,
349 struct ath_regulatory *reg)
350{
351 /* We always apply this */
352 ath_reg_apply_radar_flags(wiphy);
353
354 /*
355 * This would happen when we have sent a custom regulatory request
356 * a world regulatory domain and the scheduler hasn't yet processed
357 * any pending requests in the queue.
358 */
359 if (!request)
360 return 0;
361
362 switch (request->initiator) {
363 case NL80211_REGDOM_SET_BY_DRIVER:
364 case NL80211_REGDOM_SET_BY_CORE:
365 case NL80211_REGDOM_SET_BY_USER:
366 break;
367 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
368 if (ath_is_world_regd(reg))
369 ath_reg_apply_world_flags(wiphy, request->initiator,
370 reg);
371 break;
372 }
373
374 return 0;
375}
376EXPORT_SYMBOL(ath_reg_notifier_apply);
377
378static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
379{
380 u16 rd = ath_regd_get_eepromRD(reg);
381 int i;
382
383 if (rd & COUNTRY_ERD_FLAG) {
384 /* EEPROM value is a country code */
385 u16 cc = rd & ~COUNTRY_ERD_FLAG;
386 printk(KERN_DEBUG
387 "ath: EEPROM indicates we should expect "
388 "a country code\n");
389 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
390 if (allCountries[i].countryCode == cc)
391 return true;
392 } else {
393 /* EEPROM value is a regpair value */
394 if (rd != CTRY_DEFAULT)
395 printk(KERN_DEBUG "ath: EEPROM indicates we "
396 "should expect a direct regpair map\n");
397 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
398 if (regDomainPairs[i].regDmnEnum == rd)
399 return true;
400 }
401 printk(KERN_DEBUG
402 "ath: invalid regulatory domain/country code 0x%x\n", rd);
403 return false;
404}
405
406/* EEPROM country code to regpair mapping */
407static struct country_code_to_enum_rd*
408ath_regd_find_country(u16 countryCode)
409{
410 int i;
411
412 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
413 if (allCountries[i].countryCode == countryCode)
414 return &allCountries[i];
415 }
416 return NULL;
417}
418
419/* EEPROM rd code to regpair mapping */
420static struct country_code_to_enum_rd*
421ath_regd_find_country_by_rd(int regdmn)
422{
423 int i;
424
425 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
426 if (allCountries[i].regDmnEnum == regdmn)
427 return &allCountries[i];
428 }
429 return NULL;
430}
431
432/* Returns the map of the EEPROM set RD to a country code */
433static u16 ath_regd_get_default_country(u16 rd)
434{
435 if (rd & COUNTRY_ERD_FLAG) {
436 struct country_code_to_enum_rd *country = NULL;
437 u16 cc = rd & ~COUNTRY_ERD_FLAG;
438
439 country = ath_regd_find_country(cc);
440 if (country != NULL)
441 return cc;
442 }
443
444 return CTRY_DEFAULT;
445}
446
447static struct reg_dmn_pair_mapping*
448ath_get_regpair(int regdmn)
449{
450 int i;
451
452 if (regdmn == NO_ENUMRD)
453 return NULL;
454 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
455 if (regDomainPairs[i].regDmnEnum == regdmn)
456 return ®DomainPairs[i];
457 }
458 return NULL;
459}
460
461static int
462ath_regd_init_wiphy(struct ath_regulatory *reg,
463 struct wiphy *wiphy,
464 int (*reg_notifier)(struct wiphy *wiphy,
465 struct regulatory_request *request))
466{
467 const struct ieee80211_regdomain *regd;
468
469 wiphy->reg_notifier = reg_notifier;
470 wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
471
472 if (ath_is_world_regd(reg)) {
473 /*
474 * Anything applied here (prior to wiphy registration) gets
475 * saved on the wiphy orig_* parameters
476 */
477 regd = ath_world_regdomain(reg);
478 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
479 } else {
480 /*
481 * This gets applied in the case of the absence of CRDA,
482 * it's our own custom world regulatory domain, similar to
483 * cfg80211's but we enable passive scanning.
484 */
485 regd = ath_default_world_regdomain();
486 }
487 wiphy_apply_custom_regulatory(wiphy, regd);
488 ath_reg_apply_radar_flags(wiphy);
489 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
490 return 0;
491}
492
493/*
494 * Some users have reported their EEPROM programmed with
495 * 0x8000 set, this is not a supported regulatory domain
496 * but since we have more than one user with it we need
497 * a solution for them. We default to 0x64, which is the
498 * default Atheros world regulatory domain.
499 */
500static void ath_regd_sanitize(struct ath_regulatory *reg)
501{
502 if (reg->current_rd != COUNTRY_ERD_FLAG)
503 return;
504 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
505 reg->current_rd = 0x64;
506}
507
508int
509ath_regd_init(struct ath_regulatory *reg,
510 struct wiphy *wiphy,
511 int (*reg_notifier)(struct wiphy *wiphy,
512 struct regulatory_request *request))
513{
514 struct country_code_to_enum_rd *country = NULL;
515 u16 regdmn;
516
517 if (!reg)
518 return -EINVAL;
519
520 ath_regd_sanitize(reg);
521
522 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
523
524 if (!ath_regd_is_eeprom_valid(reg)) {
525 printk(KERN_ERR "ath: Invalid EEPROM contents\n");
526 return -EINVAL;
527 }
528
529 regdmn = ath_regd_get_eepromRD(reg);
530 reg->country_code = ath_regd_get_default_country(regdmn);
531
532 if (reg->country_code == CTRY_DEFAULT &&
533 regdmn == CTRY_DEFAULT) {
534 printk(KERN_DEBUG "ath: EEPROM indicates default "
535 "country code should be used\n");
536 reg->country_code = CTRY_UNITED_STATES;
537 }
538
539 if (reg->country_code == CTRY_DEFAULT) {
540 country = NULL;
541 } else {
542 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
543 "map search\n");
544 country = ath_regd_find_country(reg->country_code);
545 if (country == NULL) {
546 printk(KERN_DEBUG
547 "ath: no valid country maps found for "
548 "country code: 0x%0x\n",
549 reg->country_code);
550 return -EINVAL;
551 } else {
552 regdmn = country->regDmnEnum;
553 printk(KERN_DEBUG "ath: country maps to "
554 "regdmn code: 0x%0x\n",
555 regdmn);
556 }
557 }
558
559 reg->regpair = ath_get_regpair(regdmn);
560
561 if (!reg->regpair) {
562 printk(KERN_DEBUG "ath: "
563 "No regulatory domain pair found, cannot continue\n");
564 return -EINVAL;
565 }
566
567 if (!country)
568 country = ath_regd_find_country_by_rd(regdmn);
569
570 if (country) {
571 reg->alpha2[0] = country->isoName[0];
572 reg->alpha2[1] = country->isoName[1];
573 } else {
574 reg->alpha2[0] = '0';
575 reg->alpha2[1] = '0';
576 }
577
578 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
579 reg->alpha2[0], reg->alpha2[1]);
580 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
581 reg->regpair->regDmnEnum);
582
583 ath_regd_init_wiphy(reg, wiphy, reg_notifier);
584 return 0;
585}
586EXPORT_SYMBOL(ath_regd_init);
587
588u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
589 enum ieee80211_band band)
590{
591 if (!reg->regpair ||
592 (reg->country_code == CTRY_DEFAULT &&
593 is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
594 return SD_NO_CTL;
595 }
596
597 switch (band) {
598 case IEEE80211_BAND_2GHZ:
599 return reg->regpair->reg_2ghz_ctl;
600 case IEEE80211_BAND_5GHZ:
601 return reg->regpair->reg_5ghz_ctl;
602 default:
603 return NO_CTL;
604 }
605}
606EXPORT_SYMBOL(ath_regd_get_band_ctl);
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);