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1/*
2 * Copyright (c) 2008-2009 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <linux/kernel.h>
18#include <net/cfg80211.h>
19#include <net/mac80211.h>
20#include "regd.h"
21#include "regd_common.h"
22
23/*
24 * This is a set of common rules used by our world regulatory domains.
25 * We have 12 world regulatory domains. To save space we consolidate
26 * the regulatory domains in 5 structures by frequency and change
27 * the flags on our reg_notifier() on a case by case basis.
28 */
29
30/* Only these channels all allow active scan on all world regulatory domains */
31#define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
32
33/* We enable active scan on these a case by case basis by regulatory domain */
34#define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
35 NL80211_RRF_PASSIVE_SCAN)
36#define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
37 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
38
39/* We allow IBSS on these on a case by case basis by regulatory domain */
40#define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
41 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
42#define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
43 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
44#define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
45 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
46
47#define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
48 ATH9K_2GHZ_CH12_13, \
49 ATH9K_2GHZ_CH14
50
51#define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
52 ATH9K_5GHZ_5470_5850
53
54/* This one skips what we call "mid band" */
55#define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
56 ATH9K_5GHZ_5725_5850
57
58/* Can be used for:
59 * 0x60, 0x61, 0x62 */
60static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = {
61 .n_reg_rules = 5,
62 .alpha2 = "99",
63 .reg_rules = {
64 ATH9K_2GHZ_ALL,
65 ATH9K_5GHZ_ALL,
66 }
67};
68
69/* Can be used by 0x63 and 0x65 */
70static const struct ieee80211_regdomain ath_world_regdom_63_65 = {
71 .n_reg_rules = 4,
72 .alpha2 = "99",
73 .reg_rules = {
74 ATH9K_2GHZ_CH01_11,
75 ATH9K_2GHZ_CH12_13,
76 ATH9K_5GHZ_NO_MIDBAND,
77 }
78};
79
80/* Can be used by 0x64 only */
81static const struct ieee80211_regdomain ath_world_regdom_64 = {
82 .n_reg_rules = 3,
83 .alpha2 = "99",
84 .reg_rules = {
85 ATH9K_2GHZ_CH01_11,
86 ATH9K_5GHZ_NO_MIDBAND,
87 }
88};
89
90/* Can be used by 0x66 and 0x69 */
91static const struct ieee80211_regdomain ath_world_regdom_66_69 = {
92 .n_reg_rules = 3,
93 .alpha2 = "99",
94 .reg_rules = {
95 ATH9K_2GHZ_CH01_11,
96 ATH9K_5GHZ_ALL,
97 }
98};
99
100/* Can be used by 0x67, 0x68, 0x6A and 0x6C */
101static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = {
102 .n_reg_rules = 4,
103 .alpha2 = "99",
104 .reg_rules = {
105 ATH9K_2GHZ_CH01_11,
106 ATH9K_2GHZ_CH12_13,
107 ATH9K_5GHZ_ALL,
108 }
109};
110
111static inline bool is_wwr_sku(u16 regd)
112{
113 return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
114 (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
115 (regd == WORLD));
116}
117
118static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
119{
120 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
121}
122
123bool ath_is_world_regd(struct ath_regulatory *reg)
124{
125 return is_wwr_sku(ath_regd_get_eepromRD(reg));
126}
127EXPORT_SYMBOL(ath_is_world_regd);
128
129static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
130{
131 /* this is the most restrictive */
132 return &ath_world_regdom_64;
133}
134
135static const struct
136ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
137{
138 switch (reg->regpair->regDmnEnum) {
139 case 0x60:
140 case 0x61:
141 case 0x62:
142 return &ath_world_regdom_60_61_62;
143 case 0x63:
144 case 0x65:
145 return &ath_world_regdom_63_65;
146 case 0x64:
147 return &ath_world_regdom_64;
148 case 0x66:
149 case 0x69:
150 return &ath_world_regdom_66_69;
151 case 0x67:
152 case 0x68:
153 case 0x6A:
154 case 0x6C:
155 return &ath_world_regdom_67_68_6A_6C;
156 default:
157 WARN_ON(1);
158 return ath_default_world_regdomain();
159 }
160}
161
162bool ath_is_49ghz_allowed(u16 regdomain)
163{
164 /* possibly more */
165 return regdomain == MKK9_MKKC;
166}
167EXPORT_SYMBOL(ath_is_49ghz_allowed);
168
169/* Frequency is one where radar detection is required */
170static bool ath_is_radar_freq(u16 center_freq)
171{
172 return (center_freq >= 5260 && center_freq <= 5700);
173}
174
175/*
176 * N.B: These exception rules do not apply radar freqs.
177 *
178 * - We enable adhoc (or beaconing) if allowed by 11d
179 * - We enable active scan if the channel is allowed by 11d
180 * - If no country IE has been processed and a we determine we have
181 * received a beacon on a channel we can enable active scan and
182 * adhoc (or beaconing).
183 */
184static void
185ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
186 enum nl80211_reg_initiator initiator)
187{
188 enum ieee80211_band band;
189 struct ieee80211_supported_band *sband;
190 const struct ieee80211_reg_rule *reg_rule;
191 struct ieee80211_channel *ch;
192 unsigned int i;
193 u32 bandwidth = 0;
194 int r;
195
196 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
197
198 if (!wiphy->bands[band])
199 continue;
200
201 sband = wiphy->bands[band];
202
203 for (i = 0; i < sband->n_channels; i++) {
204
205 ch = &sband->channels[i];
206
207 if (ath_is_radar_freq(ch->center_freq) ||
208 (ch->flags & IEEE80211_CHAN_RADAR))
209 continue;
210
211 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
212 r = freq_reg_info(wiphy,
213 ch->center_freq,
214 bandwidth,
215 ®_rule);
216 if (r)
217 continue;
218 /*
219 * If 11d had a rule for this channel ensure
220 * we enable adhoc/beaconing if it allows us to
221 * use it. Note that we would have disabled it
222 * by applying our static world regdomain by
223 * default during init, prior to calling our
224 * regulatory_hint().
225 */
226 if (!(reg_rule->flags &
227 NL80211_RRF_NO_IBSS))
228 ch->flags &=
229 ~IEEE80211_CHAN_NO_IBSS;
230 if (!(reg_rule->flags &
231 NL80211_RRF_PASSIVE_SCAN))
232 ch->flags &=
233 ~IEEE80211_CHAN_PASSIVE_SCAN;
234 } else {
235 if (ch->beacon_found)
236 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
237 IEEE80211_CHAN_PASSIVE_SCAN);
238 }
239 }
240 }
241
242}
243
244/* Allows active scan scan on Ch 12 and 13 */
245static void
246ath_reg_apply_active_scan_flags(struct wiphy *wiphy,
247 enum nl80211_reg_initiator initiator)
248{
249 struct ieee80211_supported_band *sband;
250 struct ieee80211_channel *ch;
251 const struct ieee80211_reg_rule *reg_rule;
252 u32 bandwidth = 0;
253 int r;
254
255 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
256
257 /*
258 * If no country IE has been received always enable active scan
259 * on these channels. This is only done for specific regulatory SKUs
260 */
261 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
262 ch = &sband->channels[11]; /* CH 12 */
263 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
264 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
265 ch = &sband->channels[12]; /* CH 13 */
266 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
267 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
268 return;
269 }
270
271 /*
272 * If a country IE has been received check its rule for this
273 * channel first before enabling active scan. The passive scan
274 * would have been enforced by the initial processing of our
275 * custom regulatory domain.
276 */
277
278 ch = &sband->channels[11]; /* CH 12 */
279 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
280 if (!r) {
281 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
282 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
283 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
284 }
285
286 ch = &sband->channels[12]; /* CH 13 */
287 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
288 if (!r) {
289 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
290 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
291 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
292 }
293}
294
295/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
296static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
297{
298 struct ieee80211_supported_band *sband;
299 struct ieee80211_channel *ch;
300 unsigned int i;
301
302 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
303 return;
304
305 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
306
307 for (i = 0; i < sband->n_channels; i++) {
308 ch = &sband->channels[i];
309 if (!ath_is_radar_freq(ch->center_freq))
310 continue;
311 /* We always enable radar detection/DFS on this
312 * frequency range. Additionally we also apply on
313 * this frequency range:
314 * - If STA mode does not yet have DFS supports disable
315 * active scanning
316 * - If adhoc mode does not support DFS yet then
317 * disable adhoc in the frequency.
318 * - If AP mode does not yet support radar detection/DFS
319 * do not allow AP mode
320 */
321 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
322 ch->flags |= IEEE80211_CHAN_RADAR |
323 IEEE80211_CHAN_NO_IBSS |
324 IEEE80211_CHAN_PASSIVE_SCAN;
325 }
326}
327
328static void ath_reg_apply_world_flags(struct wiphy *wiphy,
329 enum nl80211_reg_initiator initiator,
330 struct ath_regulatory *reg)
331{
332 switch (reg->regpair->regDmnEnum) {
333 case 0x60:
334 case 0x63:
335 case 0x66:
336 case 0x67:
337 case 0x6C:
338 ath_reg_apply_beaconing_flags(wiphy, initiator);
339 break;
340 case 0x68:
341 ath_reg_apply_beaconing_flags(wiphy, initiator);
342 ath_reg_apply_active_scan_flags(wiphy, initiator);
343 break;
344 }
345}
346
347int ath_reg_notifier_apply(struct wiphy *wiphy,
348 struct regulatory_request *request,
349 struct ath_regulatory *reg)
350{
351 /* We always apply this */
352 ath_reg_apply_radar_flags(wiphy);
353
354 /*
355 * This would happen when we have sent a custom regulatory request
356 * a world regulatory domain and the scheduler hasn't yet processed
357 * any pending requests in the queue.
358 */
359 if (!request)
360 return 0;
361
362 switch (request->initiator) {
363 case NL80211_REGDOM_SET_BY_DRIVER:
364 case NL80211_REGDOM_SET_BY_CORE:
365 case NL80211_REGDOM_SET_BY_USER:
366 break;
367 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
368 if (ath_is_world_regd(reg))
369 ath_reg_apply_world_flags(wiphy, request->initiator,
370 reg);
371 break;
372 }
373
374 return 0;
375}
376EXPORT_SYMBOL(ath_reg_notifier_apply);
377
378static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
379{
380 u16 rd = ath_regd_get_eepromRD(reg);
381 int i;
382
383 if (rd & COUNTRY_ERD_FLAG) {
384 /* EEPROM value is a country code */
385 u16 cc = rd & ~COUNTRY_ERD_FLAG;
386 printk(KERN_DEBUG
387 "ath: EEPROM indicates we should expect "
388 "a country code\n");
389 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
390 if (allCountries[i].countryCode == cc)
391 return true;
392 } else {
393 /* EEPROM value is a regpair value */
394 if (rd != CTRY_DEFAULT)
395 printk(KERN_DEBUG "ath: EEPROM indicates we "
396 "should expect a direct regpair map\n");
397 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
398 if (regDomainPairs[i].regDmnEnum == rd)
399 return true;
400 }
401 printk(KERN_DEBUG
402 "ath: invalid regulatory domain/country code 0x%x\n", rd);
403 return false;
404}
405
406/* EEPROM country code to regpair mapping */
407static struct country_code_to_enum_rd*
408ath_regd_find_country(u16 countryCode)
409{
410 int i;
411
412 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
413 if (allCountries[i].countryCode == countryCode)
414 return &allCountries[i];
415 }
416 return NULL;
417}
418
419/* EEPROM rd code to regpair mapping */
420static struct country_code_to_enum_rd*
421ath_regd_find_country_by_rd(int regdmn)
422{
423 int i;
424
425 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
426 if (allCountries[i].regDmnEnum == regdmn)
427 return &allCountries[i];
428 }
429 return NULL;
430}
431
432/* Returns the map of the EEPROM set RD to a country code */
433static u16 ath_regd_get_default_country(u16 rd)
434{
435 if (rd & COUNTRY_ERD_FLAG) {
436 struct country_code_to_enum_rd *country = NULL;
437 u16 cc = rd & ~COUNTRY_ERD_FLAG;
438
439 country = ath_regd_find_country(cc);
440 if (country != NULL)
441 return cc;
442 }
443
444 return CTRY_DEFAULT;
445}
446
447static struct reg_dmn_pair_mapping*
448ath_get_regpair(int regdmn)
449{
450 int i;
451
452 if (regdmn == NO_ENUMRD)
453 return NULL;
454 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
455 if (regDomainPairs[i].regDmnEnum == regdmn)
456 return ®DomainPairs[i];
457 }
458 return NULL;
459}
460
461static int
462ath_regd_init_wiphy(struct ath_regulatory *reg,
463 struct wiphy *wiphy,
464 int (*reg_notifier)(struct wiphy *wiphy,
465 struct regulatory_request *request))
466{
467 const struct ieee80211_regdomain *regd;
468
469 wiphy->reg_notifier = reg_notifier;
470 wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
471
472 if (ath_is_world_regd(reg)) {
473 /*
474 * Anything applied here (prior to wiphy registration) gets
475 * saved on the wiphy orig_* parameters
476 */
477 regd = ath_world_regdomain(reg);
478 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
479 } else {
480 /*
481 * This gets applied in the case of the absence of CRDA,
482 * it's our own custom world regulatory domain, similar to
483 * cfg80211's but we enable passive scanning.
484 */
485 regd = ath_default_world_regdomain();
486 }
487 wiphy_apply_custom_regulatory(wiphy, regd);
488 ath_reg_apply_radar_flags(wiphy);
489 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
490 return 0;
491}
492
493/*
494 * Some users have reported their EEPROM programmed with
495 * 0x8000 set, this is not a supported regulatory domain
496 * but since we have more than one user with it we need
497 * a solution for them. We default to 0x64, which is the
498 * default Atheros world regulatory domain.
499 */
500static void ath_regd_sanitize(struct ath_regulatory *reg)
501{
502 if (reg->current_rd != COUNTRY_ERD_FLAG)
503 return;
504 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
505 reg->current_rd = 0x64;
506}
507
508int
509ath_regd_init(struct ath_regulatory *reg,
510 struct wiphy *wiphy,
511 int (*reg_notifier)(struct wiphy *wiphy,
512 struct regulatory_request *request))
513{
514 struct country_code_to_enum_rd *country = NULL;
515 u16 regdmn;
516
517 if (!reg)
518 return -EINVAL;
519
520 ath_regd_sanitize(reg);
521
522 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
523
524 if (!ath_regd_is_eeprom_valid(reg)) {
525 printk(KERN_ERR "ath: Invalid EEPROM contents\n");
526 return -EINVAL;
527 }
528
529 regdmn = ath_regd_get_eepromRD(reg);
530 reg->country_code = ath_regd_get_default_country(regdmn);
531
532 if (reg->country_code == CTRY_DEFAULT &&
533 regdmn == CTRY_DEFAULT) {
534 printk(KERN_DEBUG "ath: EEPROM indicates default "
535 "country code should be used\n");
536 reg->country_code = CTRY_UNITED_STATES;
537 }
538
539 if (reg->country_code == CTRY_DEFAULT) {
540 country = NULL;
541 } else {
542 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
543 "map search\n");
544 country = ath_regd_find_country(reg->country_code);
545 if (country == NULL) {
546 printk(KERN_DEBUG
547 "ath: no valid country maps found for "
548 "country code: 0x%0x\n",
549 reg->country_code);
550 return -EINVAL;
551 } else {
552 regdmn = country->regDmnEnum;
553 printk(KERN_DEBUG "ath: country maps to "
554 "regdmn code: 0x%0x\n",
555 regdmn);
556 }
557 }
558
559 reg->regpair = ath_get_regpair(regdmn);
560
561 if (!reg->regpair) {
562 printk(KERN_DEBUG "ath: "
563 "No regulatory domain pair found, cannot continue\n");
564 return -EINVAL;
565 }
566
567 if (!country)
568 country = ath_regd_find_country_by_rd(regdmn);
569
570 if (country) {
571 reg->alpha2[0] = country->isoName[0];
572 reg->alpha2[1] = country->isoName[1];
573 } else {
574 reg->alpha2[0] = '0';
575 reg->alpha2[1] = '0';
576 }
577
578 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
579 reg->alpha2[0], reg->alpha2[1]);
580 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
581 reg->regpair->regDmnEnum);
582
583 ath_regd_init_wiphy(reg, wiphy, reg_notifier);
584 return 0;
585}
586EXPORT_SYMBOL(ath_regd_init);
587
588u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
589 enum ieee80211_band band)
590{
591 if (!reg->regpair ||
592 (reg->country_code == CTRY_DEFAULT &&
593 is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
594 return SD_NO_CTL;
595 }
596
597 switch (band) {
598 case IEEE80211_BAND_2GHZ:
599 return reg->regpair->reg_2ghz_ctl;
600 case IEEE80211_BAND_5GHZ:
601 return reg->regpair->reg_5ghz_ctl;
602 default:
603 return NO_CTL;
604 }
605}
606EXPORT_SYMBOL(ath_regd_get_band_ctl);
1/*
2 * Copyright (c) 2008-2009 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/kernel.h>
20#include <linux/export.h>
21#include <net/cfg80211.h>
22#include <net/mac80211.h>
23#include "regd.h"
24#include "regd_common.h"
25
26static int __ath_regd_init(struct ath_regulatory *reg);
27
28/*
29 * This is a set of common rules used by our world regulatory domains.
30 * We have 12 world regulatory domains. To save space we consolidate
31 * the regulatory domains in 5 structures by frequency and change
32 * the flags on our reg_notifier() on a case by case basis.
33 */
34
35/* Only these channels all allow active scan on all world regulatory domains */
36#define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
37
38/* We enable active scan on these a case by case basis by regulatory domain */
39#define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
40 NL80211_RRF_PASSIVE_SCAN)
41#define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
42 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
43
44/* We allow IBSS on these on a case by case basis by regulatory domain */
45#define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
46 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
47#define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
48 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
49#define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
50 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
51
52#define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
53 ATH9K_2GHZ_CH12_13, \
54 ATH9K_2GHZ_CH14
55
56#define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
57 ATH9K_5GHZ_5470_5850
58
59/* This one skips what we call "mid band" */
60#define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
61 ATH9K_5GHZ_5725_5850
62
63/* Can be used for:
64 * 0x60, 0x61, 0x62 */
65static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = {
66 .n_reg_rules = 5,
67 .alpha2 = "99",
68 .reg_rules = {
69 ATH9K_2GHZ_ALL,
70 ATH9K_5GHZ_ALL,
71 }
72};
73
74/* Can be used by 0x63 and 0x65 */
75static const struct ieee80211_regdomain ath_world_regdom_63_65 = {
76 .n_reg_rules = 4,
77 .alpha2 = "99",
78 .reg_rules = {
79 ATH9K_2GHZ_CH01_11,
80 ATH9K_2GHZ_CH12_13,
81 ATH9K_5GHZ_NO_MIDBAND,
82 }
83};
84
85/* Can be used by 0x64 only */
86static const struct ieee80211_regdomain ath_world_regdom_64 = {
87 .n_reg_rules = 3,
88 .alpha2 = "99",
89 .reg_rules = {
90 ATH9K_2GHZ_CH01_11,
91 ATH9K_5GHZ_NO_MIDBAND,
92 }
93};
94
95/* Can be used by 0x66 and 0x69 */
96static const struct ieee80211_regdomain ath_world_regdom_66_69 = {
97 .n_reg_rules = 3,
98 .alpha2 = "99",
99 .reg_rules = {
100 ATH9K_2GHZ_CH01_11,
101 ATH9K_5GHZ_ALL,
102 }
103};
104
105/* Can be used by 0x67, 0x68, 0x6A and 0x6C */
106static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = {
107 .n_reg_rules = 4,
108 .alpha2 = "99",
109 .reg_rules = {
110 ATH9K_2GHZ_CH01_11,
111 ATH9K_2GHZ_CH12_13,
112 ATH9K_5GHZ_ALL,
113 }
114};
115
116static inline bool is_wwr_sku(u16 regd)
117{
118 return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
119 (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
120 (regd == WORLD));
121}
122
123static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
124{
125 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
126}
127
128bool ath_is_world_regd(struct ath_regulatory *reg)
129{
130 return is_wwr_sku(ath_regd_get_eepromRD(reg));
131}
132EXPORT_SYMBOL(ath_is_world_regd);
133
134static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
135{
136 /* this is the most restrictive */
137 return &ath_world_regdom_64;
138}
139
140static const struct
141ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
142{
143 switch (reg->regpair->regDmnEnum) {
144 case 0x60:
145 case 0x61:
146 case 0x62:
147 return &ath_world_regdom_60_61_62;
148 case 0x63:
149 case 0x65:
150 return &ath_world_regdom_63_65;
151 case 0x64:
152 return &ath_world_regdom_64;
153 case 0x66:
154 case 0x69:
155 return &ath_world_regdom_66_69;
156 case 0x67:
157 case 0x68:
158 case 0x6A:
159 case 0x6C:
160 return &ath_world_regdom_67_68_6A_6C;
161 default:
162 WARN_ON(1);
163 return ath_default_world_regdomain();
164 }
165}
166
167bool ath_is_49ghz_allowed(u16 regdomain)
168{
169 /* possibly more */
170 return regdomain == MKK9_MKKC;
171}
172EXPORT_SYMBOL(ath_is_49ghz_allowed);
173
174/* Frequency is one where radar detection is required */
175static bool ath_is_radar_freq(u16 center_freq)
176{
177 return (center_freq >= 5260 && center_freq <= 5700);
178}
179
180/*
181 * N.B: These exception rules do not apply radar freqs.
182 *
183 * - We enable adhoc (or beaconing) if allowed by 11d
184 * - We enable active scan if the channel is allowed by 11d
185 * - If no country IE has been processed and a we determine we have
186 * received a beacon on a channel we can enable active scan and
187 * adhoc (or beaconing).
188 */
189static void
190ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
191 enum nl80211_reg_initiator initiator)
192{
193 enum ieee80211_band band;
194 struct ieee80211_supported_band *sband;
195 const struct ieee80211_reg_rule *reg_rule;
196 struct ieee80211_channel *ch;
197 unsigned int i;
198 u32 bandwidth = 0;
199 int r;
200
201 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
202
203 if (!wiphy->bands[band])
204 continue;
205
206 sband = wiphy->bands[band];
207
208 for (i = 0; i < sband->n_channels; i++) {
209
210 ch = &sband->channels[i];
211
212 if (ath_is_radar_freq(ch->center_freq) ||
213 (ch->flags & IEEE80211_CHAN_RADAR))
214 continue;
215
216 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
217 r = freq_reg_info(wiphy,
218 ch->center_freq,
219 bandwidth,
220 ®_rule);
221 if (r)
222 continue;
223 /*
224 * If 11d had a rule for this channel ensure
225 * we enable adhoc/beaconing if it allows us to
226 * use it. Note that we would have disabled it
227 * by applying our static world regdomain by
228 * default during init, prior to calling our
229 * regulatory_hint().
230 */
231 if (!(reg_rule->flags &
232 NL80211_RRF_NO_IBSS))
233 ch->flags &=
234 ~IEEE80211_CHAN_NO_IBSS;
235 if (!(reg_rule->flags &
236 NL80211_RRF_PASSIVE_SCAN))
237 ch->flags &=
238 ~IEEE80211_CHAN_PASSIVE_SCAN;
239 } else {
240 if (ch->beacon_found)
241 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
242 IEEE80211_CHAN_PASSIVE_SCAN);
243 }
244 }
245 }
246
247}
248
249/* Allows active scan scan on Ch 12 and 13 */
250static void
251ath_reg_apply_active_scan_flags(struct wiphy *wiphy,
252 enum nl80211_reg_initiator initiator)
253{
254 struct ieee80211_supported_band *sband;
255 struct ieee80211_channel *ch;
256 const struct ieee80211_reg_rule *reg_rule;
257 u32 bandwidth = 0;
258 int r;
259
260 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
261 if (!sband)
262 return;
263
264 /*
265 * If no country IE has been received always enable active scan
266 * on these channels. This is only done for specific regulatory SKUs
267 */
268 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
269 ch = &sband->channels[11]; /* CH 12 */
270 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
271 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
272 ch = &sband->channels[12]; /* CH 13 */
273 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
274 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
275 return;
276 }
277
278 /*
279 * If a country IE has been received check its rule for this
280 * channel first before enabling active scan. The passive scan
281 * would have been enforced by the initial processing of our
282 * custom regulatory domain.
283 */
284
285 ch = &sband->channels[11]; /* CH 12 */
286 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
287 if (!r) {
288 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
289 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
290 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
291 }
292
293 ch = &sband->channels[12]; /* CH 13 */
294 r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
295 if (!r) {
296 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
297 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
298 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
299 }
300}
301
302/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
303static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
304{
305 struct ieee80211_supported_band *sband;
306 struct ieee80211_channel *ch;
307 unsigned int i;
308
309 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
310 return;
311
312 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
313
314 for (i = 0; i < sband->n_channels; i++) {
315 ch = &sband->channels[i];
316 if (!ath_is_radar_freq(ch->center_freq))
317 continue;
318 /* We always enable radar detection/DFS on this
319 * frequency range. Additionally we also apply on
320 * this frequency range:
321 * - If STA mode does not yet have DFS supports disable
322 * active scanning
323 * - If adhoc mode does not support DFS yet then
324 * disable adhoc in the frequency.
325 * - If AP mode does not yet support radar detection/DFS
326 * do not allow AP mode
327 */
328 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
329 ch->flags |= IEEE80211_CHAN_RADAR |
330 IEEE80211_CHAN_NO_IBSS |
331 IEEE80211_CHAN_PASSIVE_SCAN;
332 }
333}
334
335static void ath_reg_apply_world_flags(struct wiphy *wiphy,
336 enum nl80211_reg_initiator initiator,
337 struct ath_regulatory *reg)
338{
339 switch (reg->regpair->regDmnEnum) {
340 case 0x60:
341 case 0x63:
342 case 0x66:
343 case 0x67:
344 case 0x6C:
345 ath_reg_apply_beaconing_flags(wiphy, initiator);
346 break;
347 case 0x68:
348 ath_reg_apply_beaconing_flags(wiphy, initiator);
349 ath_reg_apply_active_scan_flags(wiphy, initiator);
350 break;
351 }
352}
353
354static u16 ath_regd_find_country_by_name(char *alpha2)
355{
356 unsigned int i;
357
358 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
359 if (!memcmp(allCountries[i].isoName, alpha2, 2))
360 return allCountries[i].countryCode;
361 }
362
363 return -1;
364}
365
366int ath_reg_notifier_apply(struct wiphy *wiphy,
367 struct regulatory_request *request,
368 struct ath_regulatory *reg)
369{
370 struct ath_common *common = container_of(reg, struct ath_common,
371 regulatory);
372 u16 country_code;
373
374 /* We always apply this */
375 ath_reg_apply_radar_flags(wiphy);
376
377 /*
378 * This would happen when we have sent a custom regulatory request
379 * a world regulatory domain and the scheduler hasn't yet processed
380 * any pending requests in the queue.
381 */
382 if (!request)
383 return 0;
384
385 switch (request->initiator) {
386 case NL80211_REGDOM_SET_BY_CORE:
387 /*
388 * If common->reg_world_copy is world roaming it means we *were*
389 * world roaming... so we now have to restore that data.
390 */
391 if (!ath_is_world_regd(&common->reg_world_copy))
392 break;
393
394 memcpy(reg, &common->reg_world_copy,
395 sizeof(struct ath_regulatory));
396 break;
397 case NL80211_REGDOM_SET_BY_DRIVER:
398 case NL80211_REGDOM_SET_BY_USER:
399 break;
400 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
401 if (!ath_is_world_regd(reg))
402 break;
403
404 country_code = ath_regd_find_country_by_name(request->alpha2);
405 if (country_code == (u16) -1)
406 break;
407
408 reg->current_rd = COUNTRY_ERD_FLAG;
409 reg->current_rd |= country_code;
410
411 printk(KERN_DEBUG "ath: regdomain 0x%0x updated by CountryIE\n",
412 reg->current_rd);
413 __ath_regd_init(reg);
414
415 ath_reg_apply_world_flags(wiphy, request->initiator, reg);
416
417 break;
418 }
419
420 return 0;
421}
422EXPORT_SYMBOL(ath_reg_notifier_apply);
423
424static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
425{
426 u16 rd = ath_regd_get_eepromRD(reg);
427 int i;
428
429 if (rd & COUNTRY_ERD_FLAG) {
430 /* EEPROM value is a country code */
431 u16 cc = rd & ~COUNTRY_ERD_FLAG;
432 printk(KERN_DEBUG
433 "ath: EEPROM indicates we should expect "
434 "a country code\n");
435 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
436 if (allCountries[i].countryCode == cc)
437 return true;
438 } else {
439 /* EEPROM value is a regpair value */
440 if (rd != CTRY_DEFAULT)
441 printk(KERN_DEBUG "ath: EEPROM indicates we "
442 "should expect a direct regpair map\n");
443 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
444 if (regDomainPairs[i].regDmnEnum == rd)
445 return true;
446 }
447 printk(KERN_DEBUG
448 "ath: invalid regulatory domain/country code 0x%x\n", rd);
449 return false;
450}
451
452/* EEPROM country code to regpair mapping */
453static struct country_code_to_enum_rd*
454ath_regd_find_country(u16 countryCode)
455{
456 int i;
457
458 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
459 if (allCountries[i].countryCode == countryCode)
460 return &allCountries[i];
461 }
462 return NULL;
463}
464
465/* EEPROM rd code to regpair mapping */
466static struct country_code_to_enum_rd*
467ath_regd_find_country_by_rd(int regdmn)
468{
469 int i;
470
471 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
472 if (allCountries[i].regDmnEnum == regdmn)
473 return &allCountries[i];
474 }
475 return NULL;
476}
477
478/* Returns the map of the EEPROM set RD to a country code */
479static u16 ath_regd_get_default_country(u16 rd)
480{
481 if (rd & COUNTRY_ERD_FLAG) {
482 struct country_code_to_enum_rd *country = NULL;
483 u16 cc = rd & ~COUNTRY_ERD_FLAG;
484
485 country = ath_regd_find_country(cc);
486 if (country != NULL)
487 return cc;
488 }
489
490 return CTRY_DEFAULT;
491}
492
493static struct reg_dmn_pair_mapping*
494ath_get_regpair(int regdmn)
495{
496 int i;
497
498 if (regdmn == NO_ENUMRD)
499 return NULL;
500 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
501 if (regDomainPairs[i].regDmnEnum == regdmn)
502 return ®DomainPairs[i];
503 }
504 return NULL;
505}
506
507static int
508ath_regd_init_wiphy(struct ath_regulatory *reg,
509 struct wiphy *wiphy,
510 int (*reg_notifier)(struct wiphy *wiphy,
511 struct regulatory_request *request))
512{
513 const struct ieee80211_regdomain *regd;
514
515 wiphy->reg_notifier = reg_notifier;
516 wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
517
518 if (ath_is_world_regd(reg)) {
519 /*
520 * Anything applied here (prior to wiphy registration) gets
521 * saved on the wiphy orig_* parameters
522 */
523 regd = ath_world_regdomain(reg);
524 wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
525 } else {
526 /*
527 * This gets applied in the case of the absence of CRDA,
528 * it's our own custom world regulatory domain, similar to
529 * cfg80211's but we enable passive scanning.
530 */
531 regd = ath_default_world_regdomain();
532 }
533 wiphy_apply_custom_regulatory(wiphy, regd);
534 ath_reg_apply_radar_flags(wiphy);
535 ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
536 return 0;
537}
538
539/*
540 * Some users have reported their EEPROM programmed with
541 * 0x8000 set, this is not a supported regulatory domain
542 * but since we have more than one user with it we need
543 * a solution for them. We default to 0x64, which is the
544 * default Atheros world regulatory domain.
545 */
546static void ath_regd_sanitize(struct ath_regulatory *reg)
547{
548 if (reg->current_rd != COUNTRY_ERD_FLAG)
549 return;
550 printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
551 reg->current_rd = 0x64;
552}
553
554static int __ath_regd_init(struct ath_regulatory *reg)
555{
556 struct country_code_to_enum_rd *country = NULL;
557 u16 regdmn;
558
559 if (!reg)
560 return -EINVAL;
561
562 ath_regd_sanitize(reg);
563
564 printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
565
566 if (!ath_regd_is_eeprom_valid(reg)) {
567 pr_err("Invalid EEPROM contents\n");
568 return -EINVAL;
569 }
570
571 regdmn = ath_regd_get_eepromRD(reg);
572 reg->country_code = ath_regd_get_default_country(regdmn);
573
574 if (reg->country_code == CTRY_DEFAULT &&
575 regdmn == CTRY_DEFAULT) {
576 printk(KERN_DEBUG "ath: EEPROM indicates default "
577 "country code should be used\n");
578 reg->country_code = CTRY_UNITED_STATES;
579 }
580
581 if (reg->country_code == CTRY_DEFAULT) {
582 country = NULL;
583 } else {
584 printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
585 "map search\n");
586 country = ath_regd_find_country(reg->country_code);
587 if (country == NULL) {
588 printk(KERN_DEBUG
589 "ath: no valid country maps found for "
590 "country code: 0x%0x\n",
591 reg->country_code);
592 return -EINVAL;
593 } else {
594 regdmn = country->regDmnEnum;
595 printk(KERN_DEBUG "ath: country maps to "
596 "regdmn code: 0x%0x\n",
597 regdmn);
598 }
599 }
600
601 reg->regpair = ath_get_regpair(regdmn);
602
603 if (!reg->regpair) {
604 printk(KERN_DEBUG "ath: "
605 "No regulatory domain pair found, cannot continue\n");
606 return -EINVAL;
607 }
608
609 if (!country)
610 country = ath_regd_find_country_by_rd(regdmn);
611
612 if (country) {
613 reg->alpha2[0] = country->isoName[0];
614 reg->alpha2[1] = country->isoName[1];
615 } else {
616 reg->alpha2[0] = '0';
617 reg->alpha2[1] = '0';
618 }
619
620 printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
621 reg->alpha2[0], reg->alpha2[1]);
622 printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
623 reg->regpair->regDmnEnum);
624
625 return 0;
626}
627
628int
629ath_regd_init(struct ath_regulatory *reg,
630 struct wiphy *wiphy,
631 int (*reg_notifier)(struct wiphy *wiphy,
632 struct regulatory_request *request))
633{
634 struct ath_common *common = container_of(reg, struct ath_common,
635 regulatory);
636 int r;
637
638 r = __ath_regd_init(reg);
639 if (r)
640 return r;
641
642 if (ath_is_world_regd(reg))
643 memcpy(&common->reg_world_copy, reg,
644 sizeof(struct ath_regulatory));
645
646 ath_regd_init_wiphy(reg, wiphy, reg_notifier);
647
648 return 0;
649}
650EXPORT_SYMBOL(ath_regd_init);
651
652u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
653 enum ieee80211_band band)
654{
655 if (!reg->regpair ||
656 (reg->country_code == CTRY_DEFAULT &&
657 is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
658 return SD_NO_CTL;
659 }
660
661 switch (band) {
662 case IEEE80211_BAND_2GHZ:
663 return reg->regpair->reg_2ghz_ctl;
664 case IEEE80211_BAND_5GHZ:
665 return reg->regpair->reg_5ghz_ctl;
666 default:
667 return NO_CTL;
668 }
669}
670EXPORT_SYMBOL(ath_regd_get_band_ctl);