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_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 */
66 static 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 */
76 static 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 */
87 static 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 */
97 static 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 */
107 static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = {
108 .n_reg_rules = 4,
109 .alpha2 = "99",
110 .reg_rules = {
111 ATH9K_2GHZ_CH01_11,
112 ATH9K_2GHZ_CH12_13,
113 ATH9K_5GHZ_ALL,
114 }
115 };
116
dynamic_country_user_possible(struct ath_regulatory * reg)117 static bool dynamic_country_user_possible(struct ath_regulatory *reg)
118 {
119 if (IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_CERT_TESTING))
120 return true;
121
122 switch (reg->country_code) {
123 case CTRY_UNITED_STATES:
124 case CTRY_JAPAN1:
125 case CTRY_JAPAN2:
126 case CTRY_JAPAN3:
127 case CTRY_JAPAN4:
128 case CTRY_JAPAN5:
129 case CTRY_JAPAN6:
130 case CTRY_JAPAN7:
131 case CTRY_JAPAN8:
132 case CTRY_JAPAN9:
133 case CTRY_JAPAN10:
134 case CTRY_JAPAN11:
135 case CTRY_JAPAN12:
136 case CTRY_JAPAN13:
137 case CTRY_JAPAN14:
138 case CTRY_JAPAN15:
139 case CTRY_JAPAN16:
140 case CTRY_JAPAN17:
141 case CTRY_JAPAN18:
142 case CTRY_JAPAN19:
143 case CTRY_JAPAN20:
144 case CTRY_JAPAN21:
145 case CTRY_JAPAN22:
146 case CTRY_JAPAN23:
147 case CTRY_JAPAN24:
148 case CTRY_JAPAN25:
149 case CTRY_JAPAN26:
150 case CTRY_JAPAN27:
151 case CTRY_JAPAN28:
152 case CTRY_JAPAN29:
153 case CTRY_JAPAN30:
154 case CTRY_JAPAN31:
155 case CTRY_JAPAN32:
156 case CTRY_JAPAN33:
157 case CTRY_JAPAN34:
158 case CTRY_JAPAN35:
159 case CTRY_JAPAN36:
160 case CTRY_JAPAN37:
161 case CTRY_JAPAN38:
162 case CTRY_JAPAN39:
163 case CTRY_JAPAN40:
164 case CTRY_JAPAN41:
165 case CTRY_JAPAN42:
166 case CTRY_JAPAN43:
167 case CTRY_JAPAN44:
168 case CTRY_JAPAN45:
169 case CTRY_JAPAN46:
170 case CTRY_JAPAN47:
171 case CTRY_JAPAN48:
172 case CTRY_JAPAN49:
173 case CTRY_JAPAN50:
174 case CTRY_JAPAN51:
175 case CTRY_JAPAN52:
176 case CTRY_JAPAN53:
177 case CTRY_JAPAN54:
178 case CTRY_JAPAN55:
179 case CTRY_JAPAN56:
180 case CTRY_JAPAN57:
181 case CTRY_JAPAN58:
182 case CTRY_JAPAN59:
183 return false;
184 }
185
186 return true;
187 }
188
ath_reg_dyn_country_user_allow(struct ath_regulatory * reg)189 static bool ath_reg_dyn_country_user_allow(struct ath_regulatory *reg)
190 {
191 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS))
192 return false;
193 if (!dynamic_country_user_possible(reg))
194 return false;
195 return true;
196 }
197
is_wwr_sku(u16 regd)198 static inline bool is_wwr_sku(u16 regd)
199 {
200 return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
201 (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
202 (regd == WORLD));
203 }
204
ath_regd_get_eepromRD(struct ath_regulatory * reg)205 static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
206 {
207 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
208 }
209
ath_is_world_regd(struct ath_regulatory * reg)210 bool ath_is_world_regd(struct ath_regulatory *reg)
211 {
212 return is_wwr_sku(ath_regd_get_eepromRD(reg));
213 }
214 EXPORT_SYMBOL(ath_is_world_regd);
215
ath_default_world_regdomain(void)216 static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
217 {
218 /* this is the most restrictive */
219 return &ath_world_regdom_64;
220 }
221
222 static const struct
ath_world_regdomain(struct ath_regulatory * reg)223 ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
224 {
225 switch (reg->regpair->reg_domain) {
226 case 0x60:
227 case 0x61:
228 case 0x62:
229 return &ath_world_regdom_60_61_62;
230 case 0x63:
231 case 0x65:
232 return &ath_world_regdom_63_65;
233 case 0x64:
234 return &ath_world_regdom_64;
235 case 0x66:
236 case 0x69:
237 return &ath_world_regdom_66_69;
238 case 0x67:
239 case 0x68:
240 case 0x6A:
241 case 0x6C:
242 return &ath_world_regdom_67_68_6A_6C;
243 default:
244 WARN_ON(1);
245 return ath_default_world_regdomain();
246 }
247 }
248
ath_is_49ghz_allowed(u16 regdomain)249 bool ath_is_49ghz_allowed(u16 regdomain)
250 {
251 /* possibly more */
252 return regdomain == MKK9_MKKC;
253 }
254 EXPORT_SYMBOL(ath_is_49ghz_allowed);
255
256 /* Frequency is one where radar detection is required */
ath_is_radar_freq(u16 center_freq,struct ath_regulatory * reg)257 static bool ath_is_radar_freq(u16 center_freq,
258 struct ath_regulatory *reg)
259
260 {
261 if (reg->country_code == CTRY_INDIA)
262 return (center_freq >= 5500 && center_freq <= 5700);
263 return (center_freq >= 5260 && center_freq <= 5700);
264 }
265
ath_force_clear_no_ir_chan(struct wiphy * wiphy,struct ieee80211_channel * ch)266 static void ath_force_clear_no_ir_chan(struct wiphy *wiphy,
267 struct ieee80211_channel *ch)
268 {
269 const struct ieee80211_reg_rule *reg_rule;
270
271 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
272 if (IS_ERR(reg_rule))
273 return;
274
275 if (!(reg_rule->flags & NL80211_RRF_NO_IR))
276 if (ch->flags & IEEE80211_CHAN_NO_IR)
277 ch->flags &= ~IEEE80211_CHAN_NO_IR;
278 }
279
ath_force_clear_no_ir_freq(struct wiphy * wiphy,u16 center_freq)280 static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
281 {
282 struct ieee80211_channel *ch;
283
284 ch = ieee80211_get_channel(wiphy, center_freq);
285 if (!ch)
286 return;
287
288 ath_force_clear_no_ir_chan(wiphy, ch);
289 }
290
ath_force_no_ir_chan(struct ieee80211_channel * ch)291 static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
292 {
293 ch->flags |= IEEE80211_CHAN_NO_IR;
294 }
295
ath_force_no_ir_freq(struct wiphy * wiphy,u16 center_freq)296 static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
297 {
298 struct ieee80211_channel *ch;
299
300 ch = ieee80211_get_channel(wiphy, center_freq);
301 if (!ch)
302 return;
303
304 ath_force_no_ir_chan(ch);
305 }
306
307 static void
__ath_reg_apply_beaconing_flags(struct wiphy * wiphy,struct ath_regulatory * reg,enum nl80211_reg_initiator initiator,struct ieee80211_channel * ch)308 __ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
309 struct ath_regulatory *reg,
310 enum nl80211_reg_initiator initiator,
311 struct ieee80211_channel *ch)
312 {
313 if (ath_is_radar_freq(ch->center_freq, reg) ||
314 (ch->flags & IEEE80211_CHAN_RADAR))
315 return;
316
317 switch (initiator) {
318 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
319 ath_force_clear_no_ir_chan(wiphy, ch);
320 break;
321 case NL80211_REGDOM_SET_BY_USER:
322 if (ath_reg_dyn_country_user_allow(reg))
323 ath_force_clear_no_ir_chan(wiphy, ch);
324 break;
325 default:
326 if (ch->beacon_found)
327 ch->flags &= ~IEEE80211_CHAN_NO_IR;
328 }
329 }
330
331 /*
332 * These exception rules do not apply radar frequencies.
333 *
334 * - We enable initiating radiation if the country IE says its fine:
335 * - If no country IE has been processed and a we determine we have
336 * received a beacon on a channel we can enable initiating radiation.
337 */
338 static void
ath_reg_apply_beaconing_flags(struct wiphy * wiphy,struct ath_regulatory * reg,enum nl80211_reg_initiator initiator)339 ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
340 struct ath_regulatory *reg,
341 enum nl80211_reg_initiator initiator)
342 {
343 enum nl80211_band band;
344 struct ieee80211_supported_band *sband;
345 struct ieee80211_channel *ch;
346 unsigned int i;
347
348 for (band = 0; band < NUM_NL80211_BANDS; band++) {
349 if (!wiphy->bands[band])
350 continue;
351 sband = wiphy->bands[band];
352 for (i = 0; i < sband->n_channels; i++) {
353 ch = &sband->channels[i];
354 __ath_reg_apply_beaconing_flags(wiphy, reg,
355 initiator, ch);
356 }
357 }
358 }
359
360 /**
361 * ath_reg_apply_ir_flags()
362 * @wiphy: the wiphy to use
363 * @initiator: the regulatory hint initiator
364 *
365 * If no country IE has been received always enable passive scan
366 * and no-ibss on these channels. This is only done for specific
367 * regulatory SKUs.
368 *
369 * If a country IE has been received check its rule for this
370 * channel first before enabling active scan. The passive scan
371 * would have been enforced by the initial processing of our
372 * custom regulatory domain.
373 */
374 static void
ath_reg_apply_ir_flags(struct wiphy * wiphy,struct ath_regulatory * reg,enum nl80211_reg_initiator initiator)375 ath_reg_apply_ir_flags(struct wiphy *wiphy,
376 struct ath_regulatory *reg,
377 enum nl80211_reg_initiator initiator)
378 {
379 struct ieee80211_supported_band *sband;
380
381 sband = wiphy->bands[NL80211_BAND_2GHZ];
382 if (!sband)
383 return;
384
385 switch(initiator) {
386 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
387 ath_force_clear_no_ir_freq(wiphy, 2467);
388 ath_force_clear_no_ir_freq(wiphy, 2472);
389 break;
390 case NL80211_REGDOM_SET_BY_USER:
391 if (!ath_reg_dyn_country_user_allow(reg))
392 break;
393 ath_force_clear_no_ir_freq(wiphy, 2467);
394 ath_force_clear_no_ir_freq(wiphy, 2472);
395 break;
396 default:
397 ath_force_no_ir_freq(wiphy, 2467);
398 ath_force_no_ir_freq(wiphy, 2472);
399 }
400 }
401
402 /* Always apply Radar/DFS rules on freq range 5500 MHz - 5700 MHz */
ath_reg_apply_radar_flags(struct wiphy * wiphy,struct ath_regulatory * reg)403 static void ath_reg_apply_radar_flags(struct wiphy *wiphy,
404 struct ath_regulatory *reg)
405 {
406 struct ieee80211_supported_band *sband;
407 struct ieee80211_channel *ch;
408 unsigned int i;
409
410 if (!wiphy->bands[NL80211_BAND_5GHZ])
411 return;
412
413 sband = wiphy->bands[NL80211_BAND_5GHZ];
414
415 for (i = 0; i < sband->n_channels; i++) {
416 ch = &sband->channels[i];
417 if (!ath_is_radar_freq(ch->center_freq, reg))
418 continue;
419 /* We always enable radar detection/DFS on this
420 * frequency range. Additionally we also apply on
421 * this frequency range:
422 * - If STA mode does not yet have DFS supports disable
423 * active scanning
424 * - If adhoc mode does not support DFS yet then
425 * disable adhoc in the frequency.
426 * - If AP mode does not yet support radar detection/DFS
427 * do not allow AP mode
428 */
429 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
430 ch->flags |= IEEE80211_CHAN_RADAR |
431 IEEE80211_CHAN_NO_IR;
432 }
433 }
434
ath_reg_apply_world_flags(struct wiphy * wiphy,enum nl80211_reg_initiator initiator,struct ath_regulatory * reg)435 static void ath_reg_apply_world_flags(struct wiphy *wiphy,
436 enum nl80211_reg_initiator initiator,
437 struct ath_regulatory *reg)
438 {
439 switch (reg->regpair->reg_domain) {
440 case 0x60:
441 case 0x63:
442 case 0x66:
443 case 0x67:
444 case 0x6C:
445 ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
446 break;
447 case 0x68:
448 ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
449 ath_reg_apply_ir_flags(wiphy, reg, initiator);
450 break;
451 default:
452 if (ath_reg_dyn_country_user_allow(reg))
453 ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
454 }
455 }
456
ath_regd_find_country_by_name(char * alpha2)457 u16 ath_regd_find_country_by_name(char *alpha2)
458 {
459 unsigned int i;
460
461 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
462 if (!memcmp(allCountries[i].isoName, alpha2, 2))
463 return allCountries[i].countryCode;
464 }
465
466 return -1;
467 }
468 EXPORT_SYMBOL(ath_regd_find_country_by_name);
469
__ath_reg_dyn_country(struct wiphy * wiphy,struct ath_regulatory * reg,struct regulatory_request * request)470 static int __ath_reg_dyn_country(struct wiphy *wiphy,
471 struct ath_regulatory *reg,
472 struct regulatory_request *request)
473 {
474 u16 country_code;
475
476 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
477 !ath_is_world_regd(reg))
478 return -EINVAL;
479
480 country_code = ath_regd_find_country_by_name(request->alpha2);
481 if (country_code == (u16) -1)
482 return -EINVAL;
483
484 reg->current_rd = COUNTRY_ERD_FLAG;
485 reg->current_rd |= country_code;
486
487 __ath_regd_init(reg);
488
489 ath_reg_apply_world_flags(wiphy, request->initiator, reg);
490
491 return 0;
492 }
493
ath_reg_dyn_country(struct wiphy * wiphy,struct ath_regulatory * reg,struct regulatory_request * request)494 static void ath_reg_dyn_country(struct wiphy *wiphy,
495 struct ath_regulatory *reg,
496 struct regulatory_request *request)
497 {
498 if (__ath_reg_dyn_country(wiphy, reg, request))
499 return;
500
501 printk(KERN_DEBUG "ath: regdomain 0x%0x "
502 "dynamically updated by %s\n",
503 reg->current_rd,
504 reg_initiator_name(request->initiator));
505 }
506
ath_reg_notifier_apply(struct wiphy * wiphy,struct regulatory_request * request,struct ath_regulatory * reg)507 void ath_reg_notifier_apply(struct wiphy *wiphy,
508 struct regulatory_request *request,
509 struct ath_regulatory *reg)
510 {
511 struct ath_common *common = container_of(reg, struct ath_common,
512 regulatory);
513 /* We always apply this */
514 ath_reg_apply_radar_flags(wiphy, reg);
515
516 /*
517 * This would happen when we have sent a custom regulatory request
518 * a world regulatory domain and the scheduler hasn't yet processed
519 * any pending requests in the queue.
520 */
521 if (!request)
522 return;
523
524 reg->region = request->dfs_region;
525 switch (request->initiator) {
526 case NL80211_REGDOM_SET_BY_CORE:
527 /*
528 * If common->reg_world_copy is world roaming it means we *were*
529 * world roaming... so we now have to restore that data.
530 */
531 if (!ath_is_world_regd(&common->reg_world_copy))
532 break;
533
534 memcpy(reg, &common->reg_world_copy,
535 sizeof(struct ath_regulatory));
536 break;
537 case NL80211_REGDOM_SET_BY_DRIVER:
538 break;
539 case NL80211_REGDOM_SET_BY_USER:
540 if (ath_reg_dyn_country_user_allow(reg))
541 ath_reg_dyn_country(wiphy, reg, request);
542 break;
543 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
544 ath_reg_dyn_country(wiphy, reg, request);
545 break;
546 }
547 }
548 EXPORT_SYMBOL(ath_reg_notifier_apply);
549
ath_regd_is_eeprom_valid(struct ath_regulatory * reg)550 static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
551 {
552 u16 rd = ath_regd_get_eepromRD(reg);
553 int i;
554
555 if (rd & COUNTRY_ERD_FLAG) {
556 /* EEPROM value is a country code */
557 u16 cc = rd & ~COUNTRY_ERD_FLAG;
558 printk(KERN_DEBUG
559 "ath: EEPROM indicates we should expect "
560 "a country code\n");
561 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
562 if (allCountries[i].countryCode == cc)
563 return true;
564 } else {
565 /* EEPROM value is a regpair value */
566 if (rd != CTRY_DEFAULT)
567 printk(KERN_DEBUG "ath: EEPROM indicates we "
568 "should expect a direct regpair map\n");
569 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
570 if (regDomainPairs[i].reg_domain == rd)
571 return true;
572 }
573 printk(KERN_DEBUG
574 "ath: invalid regulatory domain/country code 0x%x\n", rd);
575 return false;
576 }
577
578 /* EEPROM country code to regpair mapping */
579 static struct country_code_to_enum_rd*
ath_regd_find_country(u16 countryCode)580 ath_regd_find_country(u16 countryCode)
581 {
582 int i;
583
584 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
585 if (allCountries[i].countryCode == countryCode)
586 return &allCountries[i];
587 }
588 return NULL;
589 }
590
591 /* EEPROM rd code to regpair mapping */
592 static struct country_code_to_enum_rd*
ath_regd_find_country_by_rd(int regdmn)593 ath_regd_find_country_by_rd(int regdmn)
594 {
595 int i;
596
597 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
598 if (allCountries[i].regDmnEnum == regdmn)
599 return &allCountries[i];
600 }
601 return NULL;
602 }
603
604 /* Returns the map of the EEPROM set RD to a country code */
ath_regd_get_default_country(u16 rd)605 static u16 ath_regd_get_default_country(u16 rd)
606 {
607 if (rd & COUNTRY_ERD_FLAG) {
608 struct country_code_to_enum_rd *country = NULL;
609 u16 cc = rd & ~COUNTRY_ERD_FLAG;
610
611 country = ath_regd_find_country(cc);
612 if (country != NULL)
613 return cc;
614 }
615
616 return CTRY_DEFAULT;
617 }
618
619 static struct reg_dmn_pair_mapping*
ath_get_regpair(int regdmn)620 ath_get_regpair(int regdmn)
621 {
622 int i;
623
624 if (regdmn == NO_ENUMRD)
625 return NULL;
626 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
627 if (regDomainPairs[i].reg_domain == regdmn)
628 return ®DomainPairs[i];
629 }
630 return NULL;
631 }
632
633 static int
ath_regd_init_wiphy(struct ath_regulatory * reg,struct wiphy * wiphy,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))634 ath_regd_init_wiphy(struct ath_regulatory *reg,
635 struct wiphy *wiphy,
636 void (*reg_notifier)(struct wiphy *wiphy,
637 struct regulatory_request *request))
638 {
639 const struct ieee80211_regdomain *regd;
640
641 wiphy->reg_notifier = reg_notifier;
642 wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
643 REGULATORY_CUSTOM_REG;
644
645 if (ath_is_world_regd(reg)) {
646 /*
647 * Anything applied here (prior to wiphy registration) gets
648 * saved on the wiphy orig_* parameters
649 */
650 regd = ath_world_regdomain(reg);
651 wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER;
652 } else {
653 /*
654 * This gets applied in the case of the absence of CRDA,
655 * it's our own custom world regulatory domain, similar to
656 * cfg80211's but we enable passive scanning.
657 */
658 regd = ath_default_world_regdomain();
659 }
660
661 wiphy_apply_custom_regulatory(wiphy, regd);
662 ath_reg_apply_radar_flags(wiphy, reg);
663 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
664 return 0;
665 }
666
667 /*
668 * Some users have reported their EEPROM programmed with
669 * 0x8000 set, this is not a supported regulatory domain
670 * but since we have more than one user with it we need
671 * a solution for them. We default to 0x64, which is the
672 * default Atheros world regulatory domain.
673 */
ath_regd_sanitize(struct ath_regulatory * reg)674 static void ath_regd_sanitize(struct ath_regulatory *reg)
675 {
676 if (reg->current_rd != COUNTRY_ERD_FLAG)
677 return;
678 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
679 reg->current_rd = 0x64;
680 }
681
__ath_regd_init(struct ath_regulatory * reg)682 static int __ath_regd_init(struct ath_regulatory *reg)
683 {
684 struct country_code_to_enum_rd *country = NULL;
685 u16 regdmn;
686
687 if (!reg)
688 return -EINVAL;
689
690 ath_regd_sanitize(reg);
691
692 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
693
694 if (!ath_regd_is_eeprom_valid(reg)) {
695 pr_err("Invalid EEPROM contents\n");
696 return -EINVAL;
697 }
698
699 regdmn = ath_regd_get_eepromRD(reg);
700 reg->country_code = ath_regd_get_default_country(regdmn);
701
702 if (reg->country_code == CTRY_DEFAULT &&
703 regdmn == CTRY_DEFAULT) {
704 printk(KERN_DEBUG "ath: EEPROM indicates default "
705 "country code should be used\n");
706 reg->country_code = CTRY_UNITED_STATES;
707 }
708
709 if (reg->country_code == CTRY_DEFAULT) {
710 country = NULL;
711 } else {
712 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
713 "map search\n");
714 country = ath_regd_find_country(reg->country_code);
715 if (country == NULL) {
716 printk(KERN_DEBUG
717 "ath: no valid country maps found for "
718 "country code: 0x%0x\n",
719 reg->country_code);
720 return -EINVAL;
721 } else {
722 regdmn = country->regDmnEnum;
723 printk(KERN_DEBUG "ath: country maps to "
724 "regdmn code: 0x%0x\n",
725 regdmn);
726 }
727 }
728
729 reg->regpair = ath_get_regpair(regdmn);
730
731 if (!reg->regpair) {
732 printk(KERN_DEBUG "ath: "
733 "No regulatory domain pair found, cannot continue\n");
734 return -EINVAL;
735 }
736
737 if (!country)
738 country = ath_regd_find_country_by_rd(regdmn);
739
740 if (country) {
741 reg->alpha2[0] = country->isoName[0];
742 reg->alpha2[1] = country->isoName[1];
743 } else {
744 reg->alpha2[0] = '0';
745 reg->alpha2[1] = '0';
746 }
747
748 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
749 reg->alpha2[0], reg->alpha2[1]);
750 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
751 reg->regpair->reg_domain);
752
753 return 0;
754 }
755
756 int
ath_regd_init(struct ath_regulatory * reg,struct wiphy * wiphy,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))757 ath_regd_init(struct ath_regulatory *reg,
758 struct wiphy *wiphy,
759 void (*reg_notifier)(struct wiphy *wiphy,
760 struct regulatory_request *request))
761 {
762 struct ath_common *common = container_of(reg, struct ath_common,
763 regulatory);
764 int r;
765
766 r = __ath_regd_init(reg);
767 if (r)
768 return r;
769
770 if (ath_is_world_regd(reg))
771 memcpy(&common->reg_world_copy, reg,
772 sizeof(struct ath_regulatory));
773
774 ath_regd_init_wiphy(reg, wiphy, reg_notifier);
775
776 return 0;
777 }
778 EXPORT_SYMBOL(ath_regd_init);
779
ath_regd_get_band_ctl(struct ath_regulatory * reg,enum nl80211_band band)780 u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
781 enum nl80211_band band)
782 {
783 if (!reg->regpair ||
784 (reg->country_code == CTRY_DEFAULT &&
785 is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
786 return SD_NO_CTL;
787 }
788
789 if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) {
790 switch (reg->region) {
791 case NL80211_DFS_FCC:
792 return CTL_FCC;
793 case NL80211_DFS_ETSI:
794 return CTL_ETSI;
795 case NL80211_DFS_JP:
796 return CTL_MKK;
797 default:
798 break;
799 }
800 }
801
802 switch (band) {
803 case NL80211_BAND_2GHZ:
804 return reg->regpair->reg_2ghz_ctl;
805 case NL80211_BAND_5GHZ:
806 return reg->regpair->reg_5ghz_ctl;
807 default:
808 return NO_CTL;
809 }
810 }
811 EXPORT_SYMBOL(ath_regd_get_band_ctl);
812
