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 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 */
66 static 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 */
76 static 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 */
87 static 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 */
97 static 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 */
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 ATH_2GHZ_CH01_11,
112 ATH_2GHZ_CH12_13,
113 ATH_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 * @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 */
375 static void
ath_reg_apply_ir_flags(struct wiphy * wiphy,struct ath_regulatory * reg,enum nl80211_reg_initiator initiator)376 ath_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 */
ath_reg_apply_radar_flags(struct wiphy * wiphy,struct ath_regulatory * reg)404 static 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
ath_reg_apply_world_flags(struct wiphy * wiphy,enum nl80211_reg_initiator initiator,struct ath_regulatory * reg)436 static 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
ath_regd_find_country_by_name(char * alpha2)458 u16 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 }
469 EXPORT_SYMBOL(ath_regd_find_country_by_name);
470
__ath_reg_dyn_country(struct wiphy * wiphy,struct ath_regulatory * reg,struct regulatory_request * request)471 static 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
ath_reg_dyn_country(struct wiphy * wiphy,struct ath_regulatory * reg,struct regulatory_request * request)495 static 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
ath_reg_notifier_apply(struct wiphy * wiphy,struct regulatory_request * request,struct ath_regulatory * reg)508 void 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 }
549 EXPORT_SYMBOL(ath_reg_notifier_apply);
550
ath_regd_is_eeprom_valid(struct ath_regulatory * reg)551 static 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 */
580 static struct country_code_to_enum_rd*
ath_regd_find_country(u16 countryCode)581 ath_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 */
593 static struct country_code_to_enum_rd*
ath_regd_find_country_by_rd(int regdmn)594 ath_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 */
ath_regd_get_default_country(u16 rd)606 static 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
620 static struct reg_dmn_pair_mapping*
ath_get_regpair(int regdmn)621 ath_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
634 static int
ath_regd_init_wiphy(struct ath_regulatory * reg,struct wiphy * wiphy,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))635 ath_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 */
ath_regd_sanitize(struct ath_regulatory * reg)675 static 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
__ath_regd_init(struct ath_regulatory * reg)683 static 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
757 int
ath_regd_init(struct ath_regulatory * reg,struct wiphy * wiphy,void (* reg_notifier)(struct wiphy * wiphy,struct regulatory_request * request))758 ath_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 }
779 EXPORT_SYMBOL(ath_regd_init);
780
ath_regd_get_band_ctl(struct ath_regulatory * reg,enum nl80211_band band)781 u32 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 }
812 EXPORT_SYMBOL(ath_regd_get_band_ctl);
813