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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#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 ATH_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 ATH_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
40 NL80211_RRF_NO_IR)
41#define ATH_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 ATH_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 80, 0, 30,\
47 NL80211_RRF_NO_IR)
48#define ATH_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 80, 0, 30,\
49 NL80211_RRF_NO_IR)
50#define ATH_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 80, 0, 30,\
51 NL80211_RRF_NO_IR)
52
53#define ATH_2GHZ_ALL ATH_2GHZ_CH01_11, \
54 ATH_2GHZ_CH12_13, \
55 ATH_2GHZ_CH14
56
57#define ATH_5GHZ_ALL ATH_5GHZ_5150_5350, \
58 ATH_5GHZ_5470_5850
59
60/* This one skips what we call "mid band" */
61#define ATH_5GHZ_NO_MIDBAND ATH_5GHZ_5150_5350, \
62 ATH_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 ATH_2GHZ_ALL,
71 ATH_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 ATH_2GHZ_CH01_11,
81 ATH_2GHZ_CH12_13,
82 ATH_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 ATH_2GHZ_CH01_11,
92 ATH_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 ATH_2GHZ_CH01_11,
102 ATH_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 ATH_2GHZ_CH01_11,
112 ATH_2GHZ_CH12_13,
113 ATH_5GHZ_ALL,
114 }
115};
116
117static 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
189static 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
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 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
266static 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
280static 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
291static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
292{
293 ch->flags |= IEEE80211_CHAN_NO_IR;
294}
295
296static 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
307static void
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 */
338static void
339ath_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 * @reg: regulatory structure - used for country selection
364 * @initiator: the regulatory hint initiator
365 *
366 * If no country IE has been received always enable passive scan
367 * and no-ibss on these channels. This is only done for specific
368 * regulatory SKUs.
369 *
370 * If a country IE has been received check its rule for this
371 * channel first before enabling active scan. The passive scan
372 * would have been enforced by the initial processing of our
373 * custom regulatory domain.
374 */
375static void
376ath_reg_apply_ir_flags(struct wiphy *wiphy,
377 struct ath_regulatory *reg,
378 enum nl80211_reg_initiator initiator)
379{
380 struct ieee80211_supported_band *sband;
381
382 sband = wiphy->bands[NL80211_BAND_2GHZ];
383 if (!sband)
384 return;
385
386 switch(initiator) {
387 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
388 ath_force_clear_no_ir_freq(wiphy, 2467);
389 ath_force_clear_no_ir_freq(wiphy, 2472);
390 break;
391 case NL80211_REGDOM_SET_BY_USER:
392 if (!ath_reg_dyn_country_user_allow(reg))
393 break;
394 ath_force_clear_no_ir_freq(wiphy, 2467);
395 ath_force_clear_no_ir_freq(wiphy, 2472);
396 break;
397 default:
398 ath_force_no_ir_freq(wiphy, 2467);
399 ath_force_no_ir_freq(wiphy, 2472);
400 }
401}
402
403/* Always apply Radar/DFS rules on freq range 5500 MHz - 5700 MHz */
404static void ath_reg_apply_radar_flags(struct wiphy *wiphy,
405 struct ath_regulatory *reg)
406{
407 struct ieee80211_supported_band *sband;
408 struct ieee80211_channel *ch;
409 unsigned int i;
410
411 if (!wiphy->bands[NL80211_BAND_5GHZ])
412 return;
413
414 sband = wiphy->bands[NL80211_BAND_5GHZ];
415
416 for (i = 0; i < sband->n_channels; i++) {
417 ch = &sband->channels[i];
418 if (!ath_is_radar_freq(ch->center_freq, reg))
419 continue;
420 /* We always enable radar detection/DFS on this
421 * frequency range. Additionally we also apply on
422 * this frequency range:
423 * - If STA mode does not yet have DFS supports disable
424 * active scanning
425 * - If adhoc mode does not support DFS yet then
426 * disable adhoc in the frequency.
427 * - If AP mode does not yet support radar detection/DFS
428 * do not allow AP mode
429 */
430 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
431 ch->flags |= IEEE80211_CHAN_RADAR |
432 IEEE80211_CHAN_NO_IR;
433 }
434}
435
436static void ath_reg_apply_world_flags(struct wiphy *wiphy,
437 enum nl80211_reg_initiator initiator,
438 struct ath_regulatory *reg)
439{
440 switch (reg->regpair->reg_domain) {
441 case 0x60:
442 case 0x63:
443 case 0x66:
444 case 0x67:
445 case 0x6C:
446 ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
447 break;
448 case 0x68:
449 ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
450 ath_reg_apply_ir_flags(wiphy, reg, initiator);
451 break;
452 default:
453 if (ath_reg_dyn_country_user_allow(reg))
454 ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
455 }
456}
457
458u16 ath_regd_find_country_by_name(char *alpha2)
459{
460 unsigned int i;
461
462 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
463 if (!memcmp(allCountries[i].isoName, alpha2, 2))
464 return allCountries[i].countryCode;
465 }
466
467 return -1;
468}
469EXPORT_SYMBOL(ath_regd_find_country_by_name);
470
471static int __ath_reg_dyn_country(struct wiphy *wiphy,
472 struct ath_regulatory *reg,
473 struct regulatory_request *request)
474{
475 u16 country_code;
476
477 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
478 !ath_is_world_regd(reg))
479 return -EINVAL;
480
481 country_code = ath_regd_find_country_by_name(request->alpha2);
482 if (country_code == (u16) -1)
483 return -EINVAL;
484
485 reg->current_rd = COUNTRY_ERD_FLAG;
486 reg->current_rd |= country_code;
487
488 __ath_regd_init(reg);
489
490 ath_reg_apply_world_flags(wiphy, request->initiator, reg);
491
492 return 0;
493}
494
495static void ath_reg_dyn_country(struct wiphy *wiphy,
496 struct ath_regulatory *reg,
497 struct regulatory_request *request)
498{
499 if (__ath_reg_dyn_country(wiphy, reg, request))
500 return;
501
502 printk(KERN_DEBUG "ath: regdomain 0x%0x "
503 "dynamically updated by %s\n",
504 reg->current_rd,
505 reg_initiator_name(request->initiator));
506}
507
508void ath_reg_notifier_apply(struct wiphy *wiphy,
509 struct regulatory_request *request,
510 struct ath_regulatory *reg)
511{
512 struct ath_common *common = container_of(reg, struct ath_common,
513 regulatory);
514 /* We always apply this */
515 ath_reg_apply_radar_flags(wiphy, reg);
516
517 /*
518 * This would happen when we have sent a custom regulatory request
519 * a world regulatory domain and the scheduler hasn't yet processed
520 * any pending requests in the queue.
521 */
522 if (!request)
523 return;
524
525 reg->region = request->dfs_region;
526 switch (request->initiator) {
527 case NL80211_REGDOM_SET_BY_CORE:
528 /*
529 * If common->reg_world_copy is world roaming it means we *were*
530 * world roaming... so we now have to restore that data.
531 */
532 if (!ath_is_world_regd(&common->reg_world_copy))
533 break;
534
535 memcpy(reg, &common->reg_world_copy,
536 sizeof(struct ath_regulatory));
537 break;
538 case NL80211_REGDOM_SET_BY_DRIVER:
539 break;
540 case NL80211_REGDOM_SET_BY_USER:
541 if (ath_reg_dyn_country_user_allow(reg))
542 ath_reg_dyn_country(wiphy, reg, request);
543 break;
544 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
545 ath_reg_dyn_country(wiphy, reg, request);
546 break;
547 }
548}
549EXPORT_SYMBOL(ath_reg_notifier_apply);
550
551static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
552{
553 u16 rd = ath_regd_get_eepromRD(reg);
554 int i;
555
556 if (rd & COUNTRY_ERD_FLAG) {
557 /* EEPROM value is a country code */
558 u16 cc = rd & ~COUNTRY_ERD_FLAG;
559 printk(KERN_DEBUG
560 "ath: EEPROM indicates we should expect "
561 "a country code\n");
562 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
563 if (allCountries[i].countryCode == cc)
564 return true;
565 } else {
566 /* EEPROM value is a regpair value */
567 if (rd != CTRY_DEFAULT)
568 printk(KERN_DEBUG "ath: EEPROM indicates we "
569 "should expect a direct regpair map\n");
570 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
571 if (regDomainPairs[i].reg_domain == rd)
572 return true;
573 }
574 printk(KERN_DEBUG
575 "ath: invalid regulatory domain/country code 0x%x\n", rd);
576 return false;
577}
578
579/* EEPROM country code to regpair mapping */
580static struct country_code_to_enum_rd*
581ath_regd_find_country(u16 countryCode)
582{
583 int i;
584
585 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
586 if (allCountries[i].countryCode == countryCode)
587 return &allCountries[i];
588 }
589 return NULL;
590}
591
592/* EEPROM rd code to regpair mapping */
593static struct country_code_to_enum_rd*
594ath_regd_find_country_by_rd(int regdmn)
595{
596 int i;
597
598 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
599 if (allCountries[i].regDmnEnum == regdmn)
600 return &allCountries[i];
601 }
602 return NULL;
603}
604
605/* Returns the map of the EEPROM set RD to a country code */
606static u16 ath_regd_get_default_country(u16 rd)
607{
608 if (rd & COUNTRY_ERD_FLAG) {
609 struct country_code_to_enum_rd *country = NULL;
610 u16 cc = rd & ~COUNTRY_ERD_FLAG;
611
612 country = ath_regd_find_country(cc);
613 if (country != NULL)
614 return cc;
615 }
616
617 return CTRY_DEFAULT;
618}
619
620static struct reg_dmn_pair_mapping*
621ath_get_regpair(int regdmn)
622{
623 int i;
624
625 if (regdmn == NO_ENUMRD)
626 return NULL;
627 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
628 if (regDomainPairs[i].reg_domain == regdmn)
629 return ®DomainPairs[i];
630 }
631 return NULL;
632}
633
634static int
635ath_regd_init_wiphy(struct ath_regulatory *reg,
636 struct wiphy *wiphy,
637 void (*reg_notifier)(struct wiphy *wiphy,
638 struct regulatory_request *request))
639{
640 const struct ieee80211_regdomain *regd;
641
642 wiphy->reg_notifier = reg_notifier;
643 wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
644 REGULATORY_CUSTOM_REG;
645
646 if (ath_is_world_regd(reg)) {
647 /*
648 * Anything applied here (prior to wiphy registration) gets
649 * saved on the wiphy orig_* parameters
650 */
651 regd = ath_world_regdomain(reg);
652 wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER;
653 } else {
654 /*
655 * This gets applied in the case of the absence of CRDA,
656 * it's our own custom world regulatory domain, similar to
657 * cfg80211's but we enable passive scanning.
658 */
659 regd = ath_default_world_regdomain();
660 }
661
662 wiphy_apply_custom_regulatory(wiphy, regd);
663 ath_reg_apply_radar_flags(wiphy, reg);
664 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
665 return 0;
666}
667
668/*
669 * Some users have reported their EEPROM programmed with
670 * 0x8000 set, this is not a supported regulatory domain
671 * but since we have more than one user with it we need
672 * a solution for them. We default to 0x64, which is the
673 * default Atheros world regulatory domain.
674 */
675static void ath_regd_sanitize(struct ath_regulatory *reg)
676{
677 if (reg->current_rd != COUNTRY_ERD_FLAG)
678 return;
679 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
680 reg->current_rd = 0x64;
681}
682
683static int __ath_regd_init(struct ath_regulatory *reg)
684{
685 struct country_code_to_enum_rd *country = NULL;
686 u16 regdmn;
687
688 if (!reg)
689 return -EINVAL;
690
691 ath_regd_sanitize(reg);
692
693 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
694
695 if (!ath_regd_is_eeprom_valid(reg)) {
696 pr_err("Invalid EEPROM contents\n");
697 return -EINVAL;
698 }
699
700 regdmn = ath_regd_get_eepromRD(reg);
701 reg->country_code = ath_regd_get_default_country(regdmn);
702
703 if (reg->country_code == CTRY_DEFAULT &&
704 regdmn == CTRY_DEFAULT) {
705 printk(KERN_DEBUG "ath: EEPROM indicates default "
706 "country code should be used\n");
707 reg->country_code = CTRY_UNITED_STATES;
708 }
709
710 if (reg->country_code == CTRY_DEFAULT) {
711 country = NULL;
712 } else {
713 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
714 "map search\n");
715 country = ath_regd_find_country(reg->country_code);
716 if (country == NULL) {
717 printk(KERN_DEBUG
718 "ath: no valid country maps found for "
719 "country code: 0x%0x\n",
720 reg->country_code);
721 return -EINVAL;
722 } else {
723 regdmn = country->regDmnEnum;
724 printk(KERN_DEBUG "ath: country maps to "
725 "regdmn code: 0x%0x\n",
726 regdmn);
727 }
728 }
729
730 reg->regpair = ath_get_regpair(regdmn);
731
732 if (!reg->regpair) {
733 printk(KERN_DEBUG "ath: "
734 "No regulatory domain pair found, cannot continue\n");
735 return -EINVAL;
736 }
737
738 if (!country)
739 country = ath_regd_find_country_by_rd(regdmn);
740
741 if (country) {
742 reg->alpha2[0] = country->isoName[0];
743 reg->alpha2[1] = country->isoName[1];
744 } else {
745 reg->alpha2[0] = '0';
746 reg->alpha2[1] = '0';
747 }
748
749 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
750 reg->alpha2[0], reg->alpha2[1]);
751 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
752 reg->regpair->reg_domain);
753
754 return 0;
755}
756
757int
758ath_regd_init(struct ath_regulatory *reg,
759 struct wiphy *wiphy,
760 void (*reg_notifier)(struct wiphy *wiphy,
761 struct regulatory_request *request))
762{
763 struct ath_common *common = container_of(reg, struct ath_common,
764 regulatory);
765 int r;
766
767 r = __ath_regd_init(reg);
768 if (r)
769 return r;
770
771 if (ath_is_world_regd(reg))
772 memcpy(&common->reg_world_copy, reg,
773 sizeof(struct ath_regulatory));
774
775 ath_regd_init_wiphy(reg, wiphy, reg_notifier);
776
777 return 0;
778}
779EXPORT_SYMBOL(ath_regd_init);
780
781u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
782 enum nl80211_band band)
783{
784 if (!reg->regpair ||
785 (reg->country_code == CTRY_DEFAULT &&
786 is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
787 return SD_NO_CTL;
788 }
789
790 if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) {
791 switch (reg->region) {
792 case NL80211_DFS_FCC:
793 return CTL_FCC;
794 case NL80211_DFS_ETSI:
795 return CTL_ETSI;
796 case NL80211_DFS_JP:
797 return CTL_MKK;
798 default:
799 break;
800 }
801 }
802
803 switch (band) {
804 case NL80211_BAND_2GHZ:
805 return reg->regpair->reg_2ghz_ctl;
806 case NL80211_BAND_5GHZ:
807 return reg->regpair->reg_5ghz_ctl;
808 default:
809 return NO_CTL;
810 }
811}
812EXPORT_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 (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
189static 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
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 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
266static 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
280static 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
291static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
292{
293 ch->flags |= IEEE80211_CHAN_NO_IR;
294}
295
296static 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
307static void
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 */
338static void
339ath_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 */
374static void
375ath_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 */
403static 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
435static 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
457u16 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}
468EXPORT_SYMBOL(ath_regd_find_country_by_name);
469
470static 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
494static 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
507void 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}
548EXPORT_SYMBOL(ath_reg_notifier_apply);
549
550static 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 */
579static struct country_code_to_enum_rd*
580ath_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 */
592static struct country_code_to_enum_rd*
593ath_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 */
605static 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
619static struct reg_dmn_pair_mapping*
620ath_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
633static int
634ath_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 */
674static 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
682static 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
756int
757ath_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}
778EXPORT_SYMBOL(ath_regd_init);
779
780u32 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}
811EXPORT_SYMBOL(ath_regd_get_band_ctl);