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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
25
26
27
28
29
30
31#define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
32
33
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
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
55#define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
56 ATH9K_5GHZ_5725_5850
57
58
59
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
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
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
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
101static const struct ieee80211_regdomain ath_world_regdom_67_68_6A = {
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
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 return &ath_world_regdom_67_68_6A;
155 default:
156 WARN_ON(1);
157 return ath_default_world_regdomain();
158 }
159}
160
161
162static bool ath_is_radar_freq(u16 center_freq)
163{
164 return (center_freq >= 5260 && center_freq <= 5700);
165}
166
167
168
169
170
171
172
173
174
175
176static void
177ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
178 enum nl80211_reg_initiator initiator)
179{
180 enum ieee80211_band band;
181 struct ieee80211_supported_band *sband;
182 const struct ieee80211_reg_rule *reg_rule;
183 struct ieee80211_channel *ch;
184 unsigned int i;
185 u32 bandwidth = 0;
186 int r;
187
188 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
189
190 if (!wiphy->bands[band])
191 continue;
192
193 sband = wiphy->bands[band];
194
195 for (i = 0; i < sband->n_channels; i++) {
196
197 ch = &sband->channels[i];
198
199 if (ath_is_radar_freq(ch->center_freq) ||
200 (ch->flags & IEEE80211_CHAN_RADAR))
201 continue;
202
203 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
204 r = freq_reg_info(wiphy,
205 ch->center_freq,
206 bandwidth,
207 ®_rule);
208 if (r)
209 continue;
210
211
212
213
214
215
216
217
218 if (!(reg_rule->flags &
219 NL80211_RRF_NO_IBSS))
220 ch->flags &=
221 ~IEEE80211_CHAN_NO_IBSS;
222 if (!(reg_rule->flags &
223 NL80211_RRF_PASSIVE_SCAN))
224 ch->flags &=
225 ~IEEE80211_CHAN_PASSIVE_SCAN;
226 } else {
227 if (ch->beacon_found)
228 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
229 IEEE80211_CHAN_PASSIVE_SCAN);
230 }
231 }
232 }
233
234}
235
236
237static void
238ath_reg_apply_active_scan_flags(struct wiphy *wiphy,
239 enum nl80211_reg_initiator initiator)
240{
241 struct ieee80211_supported_band *sband;
242 struct ieee80211_channel *ch;
243 const struct ieee80211_reg_rule *reg_rule;
244 u32 bandwidth = 0;
245 int r;
246
247 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
248
249
250
251
252
253 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
254 ch = &sband->channels[11];
255 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
256 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
257 ch = &sband->channels[12];
258 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
259 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
260 return;
261 }
262
263
264
265
266
267
268
269
270 ch = &sband->channels[11];
271 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
272 if (!r) {
273 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
274 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
275 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
276 }
277
278 ch = &sband->channels[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
287
288static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
289{
290 struct ieee80211_supported_band *sband;
291 struct ieee80211_channel *ch;
292 unsigned int i;
293
294 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
295 return;
296
297 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
298
299 for (i = 0; i < sband->n_channels; i++) {
300 ch = &sband->channels[i];
301 if (!ath_is_radar_freq(ch->center_freq))
302 continue;
303
304
305
306
307
308
309
310
311
312
313 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
314 ch->flags |= IEEE80211_CHAN_RADAR |
315 IEEE80211_CHAN_NO_IBSS |
316 IEEE80211_CHAN_PASSIVE_SCAN;
317 }
318}
319
320static void ath_reg_apply_world_flags(struct wiphy *wiphy,
321 enum nl80211_reg_initiator initiator,
322 struct ath_regulatory *reg)
323{
324 switch (reg->regpair->regDmnEnum) {
325 case 0x60:
326 case 0x63:
327 case 0x66:
328 case 0x67:
329 ath_reg_apply_beaconing_flags(wiphy, initiator);
330 break;
331 case 0x68:
332 ath_reg_apply_beaconing_flags(wiphy, initiator);
333 ath_reg_apply_active_scan_flags(wiphy, initiator);
334 break;
335 }
336}
337
338int ath_reg_notifier_apply(struct wiphy *wiphy,
339 struct regulatory_request *request,
340 struct ath_regulatory *reg)
341{
342
343 ath_reg_apply_radar_flags(wiphy);
344
345
346
347
348
349
350 if (!request)
351 return 0;
352
353 switch (request->initiator) {
354 case NL80211_REGDOM_SET_BY_DRIVER:
355 case NL80211_REGDOM_SET_BY_CORE:
356 case NL80211_REGDOM_SET_BY_USER:
357 break;
358 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
359 if (ath_is_world_regd(reg))
360 ath_reg_apply_world_flags(wiphy, request->initiator,
361 reg);
362 break;
363 }
364
365 return 0;
366}
367EXPORT_SYMBOL(ath_reg_notifier_apply);
368
369static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
370{
371 u16 rd = ath_regd_get_eepromRD(reg);
372 int i;
373
374 if (rd & COUNTRY_ERD_FLAG) {
375
376 u16 cc = rd & ~COUNTRY_ERD_FLAG;
377 printk(KERN_DEBUG
378 "ath: EEPROM indicates we should expect "
379 "a country code\n");
380 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
381 if (allCountries[i].countryCode == cc)
382 return true;
383 } else {
384
385 if (rd != CTRY_DEFAULT)
386 printk(KERN_DEBUG "ath: EEPROM indicates we "
387 "should expect a direct regpair map\n");
388 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
389 if (regDomainPairs[i].regDmnEnum == rd)
390 return true;
391 }
392 printk(KERN_DEBUG
393 "ath: invalid regulatory domain/country code 0x%x\n", rd);
394 return false;
395}
396
397
398static struct country_code_to_enum_rd*
399ath_regd_find_country(u16 countryCode)
400{
401 int i;
402
403 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
404 if (allCountries[i].countryCode == countryCode)
405 return &allCountries[i];
406 }
407 return NULL;
408}
409
410
411static struct country_code_to_enum_rd*
412ath_regd_find_country_by_rd(int regdmn)
413{
414 int i;
415
416 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
417 if (allCountries[i].regDmnEnum == regdmn)
418 return &allCountries[i];
419 }
420 return NULL;
421}
422
423
424static u16 ath_regd_get_default_country(u16 rd)
425{
426 if (rd & COUNTRY_ERD_FLAG) {
427 struct country_code_to_enum_rd *country = NULL;
428 u16 cc = rd & ~COUNTRY_ERD_FLAG;
429
430 country = ath_regd_find_country(cc);
431 if (country != NULL)
432 return cc;
433 }
434
435 return CTRY_DEFAULT;
436}
437
438static struct reg_dmn_pair_mapping*
439ath_get_regpair(int regdmn)
440{
441 int i;
442
443 if (regdmn == NO_ENUMRD)
444 return NULL;
445 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
446 if (regDomainPairs[i].regDmnEnum == regdmn)
447 return ®DomainPairs[i];
448 }
449 return NULL;
450}
451
452static int
453ath_regd_init_wiphy(struct ath_regulatory *reg,
454 struct wiphy *wiphy,
455 int (*reg_notifier)(struct wiphy *wiphy,
456 struct regulatory_request *request))
457{
458 const struct ieee80211_regdomain *regd;
459
460 wiphy->reg_notifier = reg_notifier;
461 wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
462
463 if (ath_is_world_regd(reg)) {
464
465
466
467
468 regd = ath_world_regdomain(reg);
469 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
470 } else {
471
472
473
474
475
476 regd = ath_default_world_regdomain();
477 }
478 wiphy_apply_custom_regulatory(wiphy, regd);
479 ath_reg_apply_radar_flags(wiphy);
480 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
481 return 0;
482}
483
484
485
486
487
488
489
490
491static void ath_regd_sanitize(struct ath_regulatory *reg)
492{
493 if (reg->current_rd != COUNTRY_ERD_FLAG)
494 return;
495 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
496 reg->current_rd = 0x64;
497}
498
499int
500ath_regd_init(struct ath_regulatory *reg,
501 struct wiphy *wiphy,
502 int (*reg_notifier)(struct wiphy *wiphy,
503 struct regulatory_request *request))
504{
505 struct country_code_to_enum_rd *country = NULL;
506 u16 regdmn;
507
508 if (!reg)
509 return -EINVAL;
510
511 ath_regd_sanitize(reg);
512
513 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
514
515 if (!ath_regd_is_eeprom_valid(reg)) {
516 printk(KERN_ERR "ath: Invalid EEPROM contents\n");
517 return -EINVAL;
518 }
519
520 regdmn = ath_regd_get_eepromRD(reg);
521 reg->country_code = ath_regd_get_default_country(regdmn);
522
523 if (reg->country_code == CTRY_DEFAULT &&
524 regdmn == CTRY_DEFAULT) {
525 printk(KERN_DEBUG "ath: EEPROM indicates default "
526 "country code should be used\n");
527 reg->country_code = CTRY_UNITED_STATES;
528 }
529
530 if (reg->country_code == CTRY_DEFAULT) {
531 country = NULL;
532 } else {
533 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
534 "map search\n");
535 country = ath_regd_find_country(reg->country_code);
536 if (country == NULL) {
537 printk(KERN_DEBUG
538 "ath: no valid country maps found for "
539 "country code: 0x%0x\n",
540 reg->country_code);
541 return -EINVAL;
542 } else {
543 regdmn = country->regDmnEnum;
544 printk(KERN_DEBUG "ath: country maps to "
545 "regdmn code: 0x%0x\n",
546 regdmn);
547 }
548 }
549
550 reg->regpair = ath_get_regpair(regdmn);
551
552 if (!reg->regpair) {
553 printk(KERN_DEBUG "ath: "
554 "No regulatory domain pair found, cannot continue\n");
555 return -EINVAL;
556 }
557
558 if (!country)
559 country = ath_regd_find_country_by_rd(regdmn);
560
561 if (country) {
562 reg->alpha2[0] = country->isoName[0];
563 reg->alpha2[1] = country->isoName[1];
564 } else {
565 reg->alpha2[0] = '0';
566 reg->alpha2[1] = '0';
567 }
568
569 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
570 reg->alpha2[0], reg->alpha2[1]);
571 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
572 reg->regpair->regDmnEnum);
573
574 ath_regd_init_wiphy(reg, wiphy, reg_notifier);
575 return 0;
576}
577EXPORT_SYMBOL(ath_regd_init);
578
579u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
580 enum ieee80211_band band)
581{
582 if (!reg->regpair ||
583 (reg->country_code == CTRY_DEFAULT &&
584 is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
585 return SD_NO_CTL;
586 }
587
588 switch (band) {
589 case IEEE80211_BAND_2GHZ:
590 return reg->regpair->reg_2ghz_ctl;
591 case IEEE80211_BAND_5GHZ:
592 return reg->regpair->reg_5ghz_ctl;
593 default:
594 return NO_CTL;
595 }
596}
597EXPORT_SYMBOL(ath_regd_get_band_ctl);
598