2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
13 * DOC: Wireless regulatory infrastructure
15 * The usual implementation is for a driver to read a device EEPROM to
16 * determine which regulatory domain it should be operating under, then
17 * looking up the allowable channels in a driver-local table and finally
18 * registering those channels in the wiphy structure.
20 * Another set of compliance enforcement is for drivers to use their
21 * own compliance limits which can be stored on the EEPROM. The host
22 * driver or firmware may ensure these are used.
24 * In addition to all this we provide an extra layer of regulatory
25 * conformance. For drivers which do not have any regulatory
26 * information CRDA provides the complete regulatory solution.
27 * For others it provides a community effort on further restrictions
28 * to enhance compliance.
30 * Note: When number of rules --> infinity we will not be able to
31 * index on alpha2 any more, instead we'll probably have to
32 * rely on some SHA1 checksum of the regdomain for example.
35 #include <linux/kernel.h>
36 #include <linux/list.h>
37 #include <linux/random.h>
38 #include <linux/nl80211.h>
39 #include <linux/platform_device.h>
40 #include <net/wireless.h>
41 #include <net/cfg80211.h>
45 /* Receipt of information from last regulatory request */
46 static struct regulatory_request *last_request;
48 /* To trigger userspace events */
49 static struct platform_device *reg_pdev;
51 /* Keep the ordering from large to small */
52 static u32 supported_bandwidths[] = {
57 /* Central wireless core regulatory domains, we only need two,
58 * the current one and a world regulatory domain in case we have no
59 * information to give us an alpha2 */
60 static const struct ieee80211_regdomain *cfg80211_regdomain;
62 /* We use this as a place for the rd structure built from the
63 * last parsed country IE to rest until CRDA gets back to us with
64 * what it thinks should apply for the same country */
65 static const struct ieee80211_regdomain *country_ie_regdomain;
67 /* We keep a static world regulatory domain in case of the absence of CRDA */
68 static const struct ieee80211_regdomain world_regdom = {
72 REG_RULE(2412-10, 2462+10, 40, 6, 20,
73 NL80211_RRF_PASSIVE_SCAN |
78 static const struct ieee80211_regdomain *cfg80211_world_regdom =
81 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
82 static char *ieee80211_regdom = "US";
83 module_param(ieee80211_regdom, charp, 0444);
84 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
86 /* We assume 40 MHz bandwidth for the old regulatory work.
87 * We make emphasis we are using the exact same frequencies
90 static const struct ieee80211_regdomain us_regdom = {
94 /* IEEE 802.11b/g, channels 1..11 */
95 REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
96 /* IEEE 802.11a, channel 36 */
97 REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
98 /* IEEE 802.11a, channel 40 */
99 REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
100 /* IEEE 802.11a, channel 44 */
101 REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
102 /* IEEE 802.11a, channels 48..64 */
103 REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
104 /* IEEE 802.11a, channels 149..165, outdoor */
105 REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
109 static const struct ieee80211_regdomain jp_regdom = {
113 /* IEEE 802.11b/g, channels 1..14 */
114 REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
115 /* IEEE 802.11a, channels 34..48 */
116 REG_RULE(5170-10, 5240+10, 40, 6, 20,
117 NL80211_RRF_PASSIVE_SCAN),
118 /* IEEE 802.11a, channels 52..64 */
119 REG_RULE(5260-10, 5320+10, 40, 6, 20,
120 NL80211_RRF_NO_IBSS |
125 static const struct ieee80211_regdomain eu_regdom = {
127 /* This alpha2 is bogus, we leave it here just for stupid
128 * backward compatibility */
131 /* IEEE 802.11b/g, channels 1..13 */
132 REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
133 /* IEEE 802.11a, channel 36 */
134 REG_RULE(5180-10, 5180+10, 40, 6, 23,
135 NL80211_RRF_PASSIVE_SCAN),
136 /* IEEE 802.11a, channel 40 */
137 REG_RULE(5200-10, 5200+10, 40, 6, 23,
138 NL80211_RRF_PASSIVE_SCAN),
139 /* IEEE 802.11a, channel 44 */
140 REG_RULE(5220-10, 5220+10, 40, 6, 23,
141 NL80211_RRF_PASSIVE_SCAN),
142 /* IEEE 802.11a, channels 48..64 */
143 REG_RULE(5240-10, 5320+10, 40, 6, 20,
144 NL80211_RRF_NO_IBSS |
146 /* IEEE 802.11a, channels 100..140 */
147 REG_RULE(5500-10, 5700+10, 40, 6, 30,
148 NL80211_RRF_NO_IBSS |
153 static const struct ieee80211_regdomain *static_regdom(char *alpha2)
155 if (alpha2[0] == 'U' && alpha2[1] == 'S')
157 if (alpha2[0] == 'J' && alpha2[1] == 'P')
159 if (alpha2[0] == 'E' && alpha2[1] == 'U')
161 /* Default, as per the old rules */
165 static bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
167 if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
172 static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
178 static void reset_regdomains(void)
180 /* avoid freeing static information or freeing something twice */
181 if (cfg80211_regdomain == cfg80211_world_regdom)
182 cfg80211_regdomain = NULL;
183 if (cfg80211_world_regdom == &world_regdom)
184 cfg80211_world_regdom = NULL;
185 if (cfg80211_regdomain == &world_regdom)
186 cfg80211_regdomain = NULL;
187 if (is_old_static_regdom(cfg80211_regdomain))
188 cfg80211_regdomain = NULL;
190 kfree(cfg80211_regdomain);
191 kfree(cfg80211_world_regdom);
193 cfg80211_world_regdom = &world_regdom;
194 cfg80211_regdomain = NULL;
197 /* Dynamic world regulatory domain requested by the wireless
198 * core upon initialization */
199 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
201 BUG_ON(!last_request);
205 cfg80211_world_regdom = rd;
206 cfg80211_regdomain = rd;
209 bool is_world_regdom(const char *alpha2)
213 if (alpha2[0] == '0' && alpha2[1] == '0')
218 static bool is_alpha2_set(const char *alpha2)
222 if (alpha2[0] != 0 && alpha2[1] != 0)
227 static bool is_alpha_upper(char letter)
230 if (letter >= 65 && letter <= 90)
235 static bool is_unknown_alpha2(const char *alpha2)
239 /* Special case where regulatory domain was built by driver
240 * but a specific alpha2 cannot be determined */
241 if (alpha2[0] == '9' && alpha2[1] == '9')
246 static bool is_intersected_alpha2(const char *alpha2)
250 /* Special case where regulatory domain is the
251 * result of an intersection between two regulatory domain
253 if (alpha2[0] == '9' && alpha2[1] == '8')
258 static bool is_an_alpha2(const char *alpha2)
262 if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1]))
267 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
269 if (!alpha2_x || !alpha2_y)
271 if (alpha2_x[0] == alpha2_y[0] &&
272 alpha2_x[1] == alpha2_y[1])
277 static bool regdom_changed(const char *alpha2)
279 if (!cfg80211_regdomain)
281 if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
287 * country_ie_integrity_changes - tells us if the country IE has changed
288 * @checksum: checksum of country IE of fields we are interested in
290 * If the country IE has not changed you can ignore it safely. This is
291 * useful to determine if two devices are seeing two different country IEs
292 * even on the same alpha2. Note that this will return false if no IE has
293 * been set on the wireless core yet.
295 static bool country_ie_integrity_changes(u32 checksum)
297 /* If no IE has been set then the checksum doesn't change */
298 if (unlikely(!last_request->country_ie_checksum))
300 if (unlikely(last_request->country_ie_checksum != checksum))
305 /* This lets us keep regulatory code which is updated on a regulatory
306 * basis in userspace. */
307 static int call_crda(const char *alpha2)
309 char country_env[9 + 2] = "COUNTRY=";
315 if (!is_world_regdom((char *) alpha2))
316 printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n",
317 alpha2[0], alpha2[1]);
319 printk(KERN_INFO "cfg80211: Calling CRDA to update world "
320 "regulatory domain\n");
322 country_env[8] = alpha2[0];
323 country_env[9] = alpha2[1];
325 return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp);
328 /* Used by nl80211 before kmalloc'ing our regulatory domain */
329 bool reg_is_valid_request(const char *alpha2)
334 return alpha2_equal(last_request->alpha2, alpha2);
337 /* Sanity check on a regulatory rule */
338 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
340 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
343 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
346 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
349 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
351 if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff)
357 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
359 const struct ieee80211_reg_rule *reg_rule = NULL;
362 if (!rd->n_reg_rules)
365 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
368 for (i = 0; i < rd->n_reg_rules; i++) {
369 reg_rule = &rd->reg_rules[i];
370 if (!is_valid_reg_rule(reg_rule))
377 /* Returns value in KHz */
378 static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
382 for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) {
383 u32 start_freq_khz = freq - supported_bandwidths[i]/2;
384 u32 end_freq_khz = freq + supported_bandwidths[i]/2;
385 if (start_freq_khz >= freq_range->start_freq_khz &&
386 end_freq_khz <= freq_range->end_freq_khz)
387 return supported_bandwidths[i];
393 * freq_in_rule_band - tells us if a frequency is in a frequency band
394 * @freq_range: frequency rule we want to query
395 * @freq_khz: frequency we are inquiring about
397 * This lets us know if a specific frequency rule is or is not relevant to
398 * a specific frequency's band. Bands are device specific and artificial
399 * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is
400 * safe for now to assume that a frequency rule should not be part of a
401 * frequency's band if the start freq or end freq are off by more than 2 GHz.
402 * This resolution can be lowered and should be considered as we add
403 * regulatory rule support for other "bands".
405 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
408 #define ONE_GHZ_IN_KHZ 1000000
409 if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
411 if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ))
414 #undef ONE_GHZ_IN_KHZ
417 /* Converts a country IE to a regulatory domain. A regulatory domain
418 * structure has a lot of information which the IE doesn't yet have,
419 * so for the other values we use upper max values as we will intersect
420 * with our userspace regulatory agent to get lower bounds. */
421 static struct ieee80211_regdomain *country_ie_2_rd(
426 struct ieee80211_regdomain *rd = NULL;
430 u32 num_rules = 0, size_of_regd = 0;
431 u8 *triplets_start = NULL;
432 u8 len_at_triplet = 0;
433 /* the last channel we have registered in a subband (triplet) */
434 int last_sub_max_channel = 0;
436 *checksum = 0xDEADBEEF;
438 /* Country IE requirements */
439 BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN ||
440 country_ie_len & 0x01);
442 alpha2[0] = country_ie[0];
443 alpha2[1] = country_ie[1];
446 * Third octet can be:
450 * anything else we assume is no restrictions
452 if (country_ie[2] == 'I')
453 flags = NL80211_RRF_NO_OUTDOOR;
454 else if (country_ie[2] == 'O')
455 flags = NL80211_RRF_NO_INDOOR;
460 triplets_start = country_ie;
461 len_at_triplet = country_ie_len;
463 *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8);
465 /* We need to build a reg rule for each triplet, but first we must
466 * calculate the number of reg rules we will need. We will need one
467 * for each channel subband */
468 while (country_ie_len >= 3) {
469 struct ieee80211_country_ie_triplet *triplet =
470 (struct ieee80211_country_ie_triplet *) country_ie;
471 int cur_sub_max_channel = 0, cur_channel = 0;
473 if (triplet->ext.reg_extension_id >=
474 IEEE80211_COUNTRY_EXTENSION_ID) {
480 cur_channel = triplet->chans.first_channel;
481 cur_sub_max_channel = ieee80211_channel_to_frequency(
482 cur_channel + triplet->chans.num_channels);
484 /* Basic sanity check */
485 if (cur_sub_max_channel < cur_channel)
488 /* Do not allow overlapping channels. Also channels
489 * passed in each subband must be monotonically
491 if (last_sub_max_channel) {
492 if (cur_channel <= last_sub_max_channel)
494 if (cur_sub_max_channel <= last_sub_max_channel)
498 /* When dot11RegulatoryClassesRequired is supported
499 * we can throw ext triplets as part of this soup,
500 * for now we don't care when those change as we
501 * don't support them */
502 *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) |
503 ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) |
504 ((triplet->chans.max_power ^ cur_sub_max_channel) << 24);
506 last_sub_max_channel = cur_sub_max_channel;
512 /* Note: this is not a IEEE requirement but
513 * simply a memory requirement */
514 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
518 country_ie = triplets_start;
519 country_ie_len = len_at_triplet;
521 size_of_regd = sizeof(struct ieee80211_regdomain) +
522 (num_rules * sizeof(struct ieee80211_reg_rule));
524 rd = kzalloc(size_of_regd, GFP_KERNEL);
528 rd->n_reg_rules = num_rules;
529 rd->alpha2[0] = alpha2[0];
530 rd->alpha2[1] = alpha2[1];
532 /* This time around we fill in the rd */
533 while (country_ie_len >= 3) {
535 struct ieee80211_country_ie_triplet *triplet =
536 (struct ieee80211_country_ie_triplet *) country_ie;
537 struct ieee80211_reg_rule *reg_rule = NULL;
538 struct ieee80211_freq_range *freq_range = NULL;
539 struct ieee80211_power_rule *power_rule = NULL;
541 /* Must parse if dot11RegulatoryClassesRequired is true,
542 * we don't support this yet */
543 if (triplet->ext.reg_extension_id >=
544 IEEE80211_COUNTRY_EXTENSION_ID) {
550 reg_rule = &rd->reg_rules[i];
551 freq_range = ®_rule->freq_range;
552 power_rule = ®_rule->power_rule;
554 reg_rule->flags = flags;
557 if (triplet->chans.first_channel <= 14)
558 end_channel = triplet->chans.first_channel +
559 triplet->chans.num_channels;
562 * 5 GHz -- For example in country IEs if the first
563 * channel given is 36 and the number of channels is 4
564 * then the individual channel numbers defined for the
565 * 5 GHz PHY by these parameters are: 36, 40, 44, and 48
566 * and not 36, 37, 38, 39.
568 * See: http://tinyurl.com/11d-clarification
570 end_channel = triplet->chans.first_channel +
571 (4 * (triplet->chans.num_channels - 1));
573 /* The +10 is since the regulatory domain expects
574 * the actual band edge, not the center of freq for
575 * its start and end freqs, assuming 20 MHz bandwidth on
576 * the channels passed */
577 freq_range->start_freq_khz =
578 MHZ_TO_KHZ(ieee80211_channel_to_frequency(
579 triplet->chans.first_channel) - 10);
580 freq_range->end_freq_khz =
581 MHZ_TO_KHZ(ieee80211_channel_to_frequency(
584 /* Large arbitrary values, we intersect later */
585 /* Increment this if we ever support >= 40 MHz channels
587 freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40);
588 power_rule->max_antenna_gain = DBI_TO_MBI(100);
589 power_rule->max_eirp = DBM_TO_MBM(100);
595 BUG_ON(i > NL80211_MAX_SUPP_REG_RULES);
602 /* Helper for regdom_intersect(), this does the real
603 * mathematical intersection fun */
604 static int reg_rules_intersect(
605 const struct ieee80211_reg_rule *rule1,
606 const struct ieee80211_reg_rule *rule2,
607 struct ieee80211_reg_rule *intersected_rule)
609 const struct ieee80211_freq_range *freq_range1, *freq_range2;
610 struct ieee80211_freq_range *freq_range;
611 const struct ieee80211_power_rule *power_rule1, *power_rule2;
612 struct ieee80211_power_rule *power_rule;
615 freq_range1 = &rule1->freq_range;
616 freq_range2 = &rule2->freq_range;
617 freq_range = &intersected_rule->freq_range;
619 power_rule1 = &rule1->power_rule;
620 power_rule2 = &rule2->power_rule;
621 power_rule = &intersected_rule->power_rule;
623 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
624 freq_range2->start_freq_khz);
625 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
626 freq_range2->end_freq_khz);
627 freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
628 freq_range2->max_bandwidth_khz);
630 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
631 if (freq_range->max_bandwidth_khz > freq_diff)
632 freq_range->max_bandwidth_khz = freq_diff;
634 power_rule->max_eirp = min(power_rule1->max_eirp,
635 power_rule2->max_eirp);
636 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
637 power_rule2->max_antenna_gain);
639 intersected_rule->flags = (rule1->flags | rule2->flags);
641 if (!is_valid_reg_rule(intersected_rule))
648 * regdom_intersect - do the intersection between two regulatory domains
649 * @rd1: first regulatory domain
650 * @rd2: second regulatory domain
652 * Use this function to get the intersection between two regulatory domains.
653 * Once completed we will mark the alpha2 for the rd as intersected, "98",
654 * as no one single alpha2 can represent this regulatory domain.
656 * Returns a pointer to the regulatory domain structure which will hold the
657 * resulting intersection of rules between rd1 and rd2. We will
658 * kzalloc() this structure for you.
660 static struct ieee80211_regdomain *regdom_intersect(
661 const struct ieee80211_regdomain *rd1,
662 const struct ieee80211_regdomain *rd2)
666 unsigned int num_rules = 0, rule_idx = 0;
667 const struct ieee80211_reg_rule *rule1, *rule2;
668 struct ieee80211_reg_rule *intersected_rule;
669 struct ieee80211_regdomain *rd;
670 /* This is just a dummy holder to help us count */
671 struct ieee80211_reg_rule irule;
673 /* Uses the stack temporarily for counter arithmetic */
674 intersected_rule = &irule;
676 memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
681 /* First we get a count of the rules we'll need, then we actually
682 * build them. This is to so we can malloc() and free() a
683 * regdomain once. The reason we use reg_rules_intersect() here
684 * is it will return -EINVAL if the rule computed makes no sense.
685 * All rules that do check out OK are valid. */
687 for (x = 0; x < rd1->n_reg_rules; x++) {
688 rule1 = &rd1->reg_rules[x];
689 for (y = 0; y < rd2->n_reg_rules; y++) {
690 rule2 = &rd2->reg_rules[y];
691 if (!reg_rules_intersect(rule1, rule2,
694 memset(intersected_rule, 0,
695 sizeof(struct ieee80211_reg_rule));
702 size_of_regd = sizeof(struct ieee80211_regdomain) +
703 ((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
705 rd = kzalloc(size_of_regd, GFP_KERNEL);
709 for (x = 0; x < rd1->n_reg_rules; x++) {
710 rule1 = &rd1->reg_rules[x];
711 for (y = 0; y < rd2->n_reg_rules; y++) {
712 rule2 = &rd2->reg_rules[y];
713 /* This time around instead of using the stack lets
714 * write to the target rule directly saving ourselves
716 intersected_rule = &rd->reg_rules[rule_idx];
717 r = reg_rules_intersect(rule1, rule2,
719 /* No need to memset here the intersected rule here as
720 * we're not using the stack anymore */
727 if (rule_idx != num_rules) {
732 rd->n_reg_rules = num_rules;
739 /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
740 * want to just have the channel structure use these */
741 static u32 map_regdom_flags(u32 rd_flags)
743 u32 channel_flags = 0;
744 if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
745 channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
746 if (rd_flags & NL80211_RRF_NO_IBSS)
747 channel_flags |= IEEE80211_CHAN_NO_IBSS;
748 if (rd_flags & NL80211_RRF_DFS)
749 channel_flags |= IEEE80211_CHAN_RADAR;
750 return channel_flags;
753 static int freq_reg_info_regd(struct wiphy *wiphy,
756 const struct ieee80211_reg_rule **reg_rule,
757 const struct ieee80211_regdomain *custom_regd)
760 bool band_rule_found = false;
761 const struct ieee80211_regdomain *regd;
762 u32 max_bandwidth = 0;
764 regd = custom_regd ? custom_regd : cfg80211_regdomain;
766 /* Follow the driver's regulatory domain, if present, unless a country
767 * IE has been processed or a user wants to help complaince further */
768 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE &&
769 last_request->initiator != REGDOM_SET_BY_USER &&
776 for (i = 0; i < regd->n_reg_rules; i++) {
777 const struct ieee80211_reg_rule *rr;
778 const struct ieee80211_freq_range *fr = NULL;
779 const struct ieee80211_power_rule *pr = NULL;
781 rr = ®d->reg_rules[i];
782 fr = &rr->freq_range;
783 pr = &rr->power_rule;
785 /* We only need to know if one frequency rule was
786 * was in center_freq's band, that's enough, so lets
787 * not overwrite it once found */
788 if (!band_rule_found)
789 band_rule_found = freq_in_rule_band(fr, center_freq);
791 max_bandwidth = freq_max_bandwidth(fr, center_freq);
793 if (max_bandwidth && *bandwidth <= max_bandwidth) {
795 *bandwidth = max_bandwidth;
800 if (!band_rule_found)
803 return !max_bandwidth;
805 EXPORT_SYMBOL(freq_reg_info);
807 int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth,
808 const struct ieee80211_reg_rule **reg_rule)
810 return freq_reg_info_regd(wiphy, center_freq,
811 bandwidth, reg_rule, NULL);
814 static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,
815 unsigned int chan_idx)
819 u32 max_bandwidth = 0;
820 const struct ieee80211_reg_rule *reg_rule = NULL;
821 const struct ieee80211_power_rule *power_rule = NULL;
822 struct ieee80211_supported_band *sband;
823 struct ieee80211_channel *chan;
825 sband = wiphy->bands[band];
826 BUG_ON(chan_idx >= sband->n_channels);
827 chan = &sband->channels[chan_idx];
829 flags = chan->orig_flags;
831 r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq),
832 &max_bandwidth, ®_rule);
835 /* This means no regulatory rule was found in the country IE
836 * with a frequency range on the center_freq's band, since
837 * IEEE-802.11 allows for a country IE to have a subset of the
838 * regulatory information provided in a country we ignore
839 * disabling the channel unless at least one reg rule was
840 * found on the center_freq's band. For details see this
843 * http://tinyurl.com/11d-clarification
846 last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
847 #ifdef CONFIG_CFG80211_REG_DEBUG
848 printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz "
849 "intact on %s - no rule found in band on "
851 chan->center_freq, wiphy_name(wiphy));
854 /* In this case we know the country IE has at least one reg rule
855 * for the band so we respect its band definitions */
856 #ifdef CONFIG_CFG80211_REG_DEBUG
857 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
858 printk(KERN_DEBUG "cfg80211: Disabling "
859 "channel %d MHz on %s due to "
861 chan->center_freq, wiphy_name(wiphy));
863 flags |= IEEE80211_CHAN_DISABLED;
869 power_rule = ®_rule->power_rule;
871 if (last_request->initiator == REGDOM_SET_BY_DRIVER &&
872 last_request->wiphy && last_request->wiphy == wiphy &&
873 last_request->wiphy->strict_regulatory) {
874 /* This gaurantees the driver's requested regulatory domain
875 * will always be used as a base for further regulatory
877 chan->flags = chan->orig_flags =
878 map_regdom_flags(reg_rule->flags);
879 chan->max_antenna_gain = chan->orig_mag =
880 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
881 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
882 chan->max_power = chan->orig_mpwr =
883 (int) MBM_TO_DBM(power_rule->max_eirp);
887 chan->flags = flags | map_regdom_flags(reg_rule->flags);
888 chan->max_antenna_gain = min(chan->orig_mag,
889 (int) MBI_TO_DBI(power_rule->max_antenna_gain));
890 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
892 chan->max_power = min(chan->orig_mpwr,
893 (int) MBM_TO_DBM(power_rule->max_eirp));
895 chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
898 static void handle_band(struct wiphy *wiphy, enum ieee80211_band band)
901 struct ieee80211_supported_band *sband;
903 BUG_ON(!wiphy->bands[band]);
904 sband = wiphy->bands[band];
906 for (i = 0; i < sband->n_channels; i++)
907 handle_channel(wiphy, band, i);
910 static bool ignore_reg_update(struct wiphy *wiphy, enum reg_set_by setby)
914 if (setby == REGDOM_SET_BY_CORE &&
915 wiphy->custom_regulatory)
917 /* wiphy->regd will be set once the device has its own
918 * desired regulatory domain set */
919 if (wiphy->strict_regulatory && !wiphy->regd &&
920 !is_world_regdom(last_request->alpha2))
925 static void update_all_wiphy_regulatory(enum reg_set_by setby)
927 struct cfg80211_registered_device *drv;
929 list_for_each_entry(drv, &cfg80211_drv_list, list)
930 wiphy_update_regulatory(&drv->wiphy, setby);
933 void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
935 enum ieee80211_band band;
937 if (ignore_reg_update(wiphy, setby))
939 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
940 if (wiphy->bands[band])
941 handle_band(wiphy, band);
943 if (wiphy->reg_notifier)
944 wiphy->reg_notifier(wiphy, last_request);
947 static void handle_channel_custom(struct wiphy *wiphy,
948 enum ieee80211_band band,
949 unsigned int chan_idx,
950 const struct ieee80211_regdomain *regd)
953 u32 max_bandwidth = 0;
954 const struct ieee80211_reg_rule *reg_rule = NULL;
955 const struct ieee80211_power_rule *power_rule = NULL;
956 struct ieee80211_supported_band *sband;
957 struct ieee80211_channel *chan;
959 sband = wiphy->bands[band];
960 BUG_ON(chan_idx >= sband->n_channels);
961 chan = &sband->channels[chan_idx];
963 r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),
964 &max_bandwidth, ®_rule, regd);
967 chan->flags = IEEE80211_CHAN_DISABLED;
971 power_rule = ®_rule->power_rule;
973 chan->flags |= map_regdom_flags(reg_rule->flags);
974 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
975 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
976 chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
979 static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,
980 const struct ieee80211_regdomain *regd)
983 struct ieee80211_supported_band *sband;
985 BUG_ON(!wiphy->bands[band]);
986 sband = wiphy->bands[band];
988 for (i = 0; i < sband->n_channels; i++)
989 handle_channel_custom(wiphy, band, i, regd);
992 /* Used by drivers prior to wiphy registration */
993 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
994 const struct ieee80211_regdomain *regd)
996 enum ieee80211_band band;
997 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
998 if (wiphy->bands[band])
999 handle_band_custom(wiphy, band, regd);
1002 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1004 static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,
1005 const struct ieee80211_regdomain *src_regd)
1007 struct ieee80211_regdomain *regd;
1008 int size_of_regd = 0;
1011 size_of_regd = sizeof(struct ieee80211_regdomain) +
1012 ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule));
1014 regd = kzalloc(size_of_regd, GFP_KERNEL);
1018 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
1020 for (i = 0; i < src_regd->n_reg_rules; i++)
1021 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
1022 sizeof(struct ieee80211_reg_rule));
1028 /* Return value which can be used by ignore_request() to indicate
1029 * it has been determined we should intersect two regulatory domains */
1030 #define REG_INTERSECT 1
1032 /* This has the logic which determines when a new request
1033 * should be ignored. */
1034 static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
1037 /* All initial requests are respected */
1042 case REGDOM_SET_BY_INIT:
1044 case REGDOM_SET_BY_CORE:
1046 * Always respect new wireless core hints, should only happen
1047 * when updating the world regulatory domain at init.
1050 case REGDOM_SET_BY_COUNTRY_IE:
1051 if (unlikely(!is_an_alpha2(alpha2)))
1053 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
1054 if (last_request->wiphy != wiphy) {
1056 * Two cards with two APs claiming different
1057 * different Country IE alpha2s. We could
1058 * intersect them, but that seems unlikely
1059 * to be correct. Reject second one for now.
1061 if (!alpha2_equal(alpha2,
1062 cfg80211_regdomain->alpha2))
1066 /* Two consecutive Country IE hints on the same wiphy.
1067 * This should be picked up early by the driver/stack */
1068 if (WARN_ON(!alpha2_equal(cfg80211_regdomain->alpha2,
1073 return REG_INTERSECT;
1074 case REGDOM_SET_BY_DRIVER:
1075 if (last_request->initiator == REGDOM_SET_BY_CORE) {
1076 if (is_old_static_regdom(cfg80211_regdomain))
1078 if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
1082 return REG_INTERSECT;
1083 case REGDOM_SET_BY_USER:
1084 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
1085 return REG_INTERSECT;
1086 /* If the user knows better the user should set the regdom
1087 * to their country before the IE is picked up */
1088 if (last_request->initiator == REGDOM_SET_BY_USER &&
1089 last_request->intersect)
1091 /* Process user requests only after previous user/driver/core
1092 * requests have been processed */
1093 if (last_request->initiator == REGDOM_SET_BY_CORE ||
1094 last_request->initiator == REGDOM_SET_BY_DRIVER ||
1095 last_request->initiator == REGDOM_SET_BY_USER) {
1096 if (!alpha2_equal(last_request->alpha2,
1097 cfg80211_regdomain->alpha2))
1101 if (!is_old_static_regdom(cfg80211_regdomain) &&
1102 alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
1111 /* Caller must hold &cfg80211_drv_mutex */
1112 int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
1114 u32 country_ie_checksum,
1115 enum environment_cap env)
1117 struct regulatory_request *request;
1118 bool intersect = false;
1121 r = ignore_request(wiphy, set_by, alpha2);
1123 if (r == REG_INTERSECT) {
1124 if (set_by == REGDOM_SET_BY_DRIVER) {
1125 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
1131 /* If the regulatory domain being requested by the
1132 * driver has already been set just copy it to the
1134 if (r == -EALREADY && set_by == REGDOM_SET_BY_DRIVER) {
1135 r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);
1145 request = kzalloc(sizeof(struct regulatory_request),
1150 request->alpha2[0] = alpha2[0];
1151 request->alpha2[1] = alpha2[1];
1152 request->initiator = set_by;
1153 request->wiphy = wiphy;
1154 request->intersect = intersect;
1155 request->country_ie_checksum = country_ie_checksum;
1156 request->country_ie_env = env;
1158 kfree(last_request);
1159 last_request = request;
1161 /* When r == REG_INTERSECT we do need to call CRDA */
1166 * Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled
1167 * AND if CRDA is NOT present nothing will happen, if someone
1168 * wants to bother with 11d with OLD_REG you can add a timer.
1169 * If after x amount of time nothing happens you can call:
1171 * return set_regdom(country_ie_regdomain);
1173 * to intersect with the static rd
1175 return call_crda(alpha2);
1178 void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
1183 mutex_lock(&cfg80211_drv_mutex);
1184 r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER,
1185 alpha2, 0, ENVIRON_ANY);
1186 /* This is required so that the orig_* parameters are saved */
1187 if (r == -EALREADY && wiphy->strict_regulatory)
1188 wiphy_update_regulatory(wiphy, REGDOM_SET_BY_DRIVER);
1189 mutex_unlock(&cfg80211_drv_mutex);
1191 EXPORT_SYMBOL(regulatory_hint);
1193 static bool reg_same_country_ie_hint(struct wiphy *wiphy,
1194 u32 country_ie_checksum)
1196 if (!last_request->wiphy)
1198 if (likely(last_request->wiphy != wiphy))
1199 return !country_ie_integrity_changes(country_ie_checksum);
1200 /* We should not have let these through at this point, they
1201 * should have been picked up earlier by the first alpha2 check
1203 if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum)))
1208 void regulatory_hint_11d(struct wiphy *wiphy,
1212 struct ieee80211_regdomain *rd = NULL;
1215 enum environment_cap env = ENVIRON_ANY;
1220 mutex_lock(&cfg80211_drv_mutex);
1222 /* IE len must be evenly divisible by 2 */
1223 if (country_ie_len & 0x01)
1226 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1229 /* Pending country IE processing, this can happen after we
1230 * call CRDA and wait for a response if a beacon was received before
1231 * we were able to process the last regulatory_hint_11d() call */
1232 if (country_ie_regdomain)
1235 alpha2[0] = country_ie[0];
1236 alpha2[1] = country_ie[1];
1238 if (country_ie[2] == 'I')
1239 env = ENVIRON_INDOOR;
1240 else if (country_ie[2] == 'O')
1241 env = ENVIRON_OUTDOOR;
1243 /* We will run this for *every* beacon processed for the BSSID, so
1244 * we optimize an early check to exit out early if we don't have to
1246 if (likely(last_request->wiphy)) {
1247 struct cfg80211_registered_device *drv_last_ie;
1249 drv_last_ie = wiphy_to_dev(last_request->wiphy);
1251 /* Lets keep this simple -- we trust the first AP
1252 * after we intersect with CRDA */
1253 if (likely(last_request->wiphy == wiphy)) {
1254 /* Ignore IEs coming in on this wiphy with
1255 * the same alpha2 and environment cap */
1256 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
1258 env == drv_last_ie->env)) {
1261 /* the wiphy moved on to another BSSID or the AP
1262 * was reconfigured. XXX: We need to deal with the
1263 * case where the user suspends and goes to goes
1264 * to another country, and then gets IEs from an
1265 * AP with different settings */
1268 /* Ignore IEs coming in on two separate wiphys with
1269 * the same alpha2 and environment cap */
1270 if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2,
1272 env == drv_last_ie->env)) {
1275 /* We could potentially intersect though */
1280 rd = country_ie_2_rd(country_ie, country_ie_len, &checksum);
1284 /* This will not happen right now but we leave it here for the
1285 * the future when we want to add suspend/resume support and having
1286 * the user move to another country after doing so, or having the user
1287 * move to another AP. Right now we just trust the first AP. This is why
1288 * this is marked as likley(). If we hit this before we add this support
1289 * we want to be informed of it as it would indicate a mistake in the
1291 if (likely(WARN_ON(reg_same_country_ie_hint(wiphy, checksum))))
1294 /* We keep this around for when CRDA comes back with a response so
1295 * we can intersect with that */
1296 country_ie_regdomain = rd;
1298 __regulatory_hint(wiphy, REGDOM_SET_BY_COUNTRY_IE,
1299 country_ie_regdomain->alpha2, checksum, env);
1302 mutex_unlock(&cfg80211_drv_mutex);
1304 EXPORT_SYMBOL(regulatory_hint_11d);
1306 static void print_rd_rules(const struct ieee80211_regdomain *rd)
1309 const struct ieee80211_reg_rule *reg_rule = NULL;
1310 const struct ieee80211_freq_range *freq_range = NULL;
1311 const struct ieee80211_power_rule *power_rule = NULL;
1313 printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), "
1314 "(max_antenna_gain, max_eirp)\n");
1316 for (i = 0; i < rd->n_reg_rules; i++) {
1317 reg_rule = &rd->reg_rules[i];
1318 freq_range = ®_rule->freq_range;
1319 power_rule = ®_rule->power_rule;
1321 /* There may not be documentation for max antenna gain
1322 * in certain regions */
1323 if (power_rule->max_antenna_gain)
1324 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
1325 "(%d mBi, %d mBm)\n",
1326 freq_range->start_freq_khz,
1327 freq_range->end_freq_khz,
1328 freq_range->max_bandwidth_khz,
1329 power_rule->max_antenna_gain,
1330 power_rule->max_eirp);
1332 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
1334 freq_range->start_freq_khz,
1335 freq_range->end_freq_khz,
1336 freq_range->max_bandwidth_khz,
1337 power_rule->max_eirp);
1341 static void print_regdomain(const struct ieee80211_regdomain *rd)
1344 if (is_intersected_alpha2(rd->alpha2)) {
1345 struct wiphy *wiphy = NULL;
1346 struct cfg80211_registered_device *drv;
1348 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
1349 if (last_request->wiphy) {
1350 wiphy = last_request->wiphy;
1351 drv = wiphy_to_dev(wiphy);
1352 printk(KERN_INFO "cfg80211: Current regulatory "
1353 "domain updated by AP to: %c%c\n",
1354 drv->country_ie_alpha2[0],
1355 drv->country_ie_alpha2[1]);
1357 printk(KERN_INFO "cfg80211: Current regulatory "
1358 "domain intersected: \n");
1360 printk(KERN_INFO "cfg80211: Current regulatory "
1361 "domain intersected: \n");
1362 } else if (is_world_regdom(rd->alpha2))
1363 printk(KERN_INFO "cfg80211: World regulatory "
1364 "domain updated:\n");
1366 if (is_unknown_alpha2(rd->alpha2))
1367 printk(KERN_INFO "cfg80211: Regulatory domain "
1368 "changed to driver built-in settings "
1369 "(unknown country)\n");
1371 printk(KERN_INFO "cfg80211: Regulatory domain "
1372 "changed to country: %c%c\n",
1373 rd->alpha2[0], rd->alpha2[1]);
1378 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
1380 printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
1381 rd->alpha2[0], rd->alpha2[1]);
1385 #ifdef CONFIG_CFG80211_REG_DEBUG
1386 static void reg_country_ie_process_debug(
1387 const struct ieee80211_regdomain *rd,
1388 const struct ieee80211_regdomain *country_ie_regdomain,
1389 const struct ieee80211_regdomain *intersected_rd)
1391 printk(KERN_DEBUG "cfg80211: Received country IE:\n");
1392 print_regdomain_info(country_ie_regdomain);
1393 printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n");
1394 print_regdomain_info(rd);
1395 if (intersected_rd) {
1396 printk(KERN_DEBUG "cfg80211: We intersect both of these "
1398 print_regdomain_info(rd);
1401 printk(KERN_DEBUG "cfg80211: Intersection between both failed\n");
1404 static inline void reg_country_ie_process_debug(
1405 const struct ieee80211_regdomain *rd,
1406 const struct ieee80211_regdomain *country_ie_regdomain,
1407 const struct ieee80211_regdomain *intersected_rd)
1412 /* Takes ownership of rd only if it doesn't fail */
1413 static int __set_regdom(const struct ieee80211_regdomain *rd)
1415 const struct ieee80211_regdomain *intersected_rd = NULL;
1416 struct cfg80211_registered_device *drv = NULL;
1417 struct wiphy *wiphy = NULL;
1418 /* Some basic sanity checks first */
1420 if (is_world_regdom(rd->alpha2)) {
1421 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
1423 update_world_regdomain(rd);
1427 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
1428 !is_unknown_alpha2(rd->alpha2))
1434 /* Lets only bother proceeding on the same alpha2 if the current
1435 * rd is non static (it means CRDA was present and was used last)
1436 * and the pending request came in from a country IE */
1437 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
1438 /* If someone else asked us to change the rd lets only bother
1439 * checking if the alpha2 changes if CRDA was already called */
1440 if (!is_old_static_regdom(cfg80211_regdomain) &&
1441 !regdom_changed(rd->alpha2))
1445 wiphy = last_request->wiphy;
1447 /* Now lets set the regulatory domain, update all driver channels
1448 * and finally inform them of what we have done, in case they want
1449 * to review or adjust their own settings based on their own
1450 * internal EEPROM data */
1452 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
1455 if (!is_valid_rd(rd)) {
1456 printk(KERN_ERR "cfg80211: Invalid "
1457 "regulatory domain detected:\n");
1458 print_regdomain_info(rd);
1462 if (!last_request->intersect) {
1465 if (last_request->initiator != REGDOM_SET_BY_DRIVER) {
1467 cfg80211_regdomain = rd;
1471 /* For a driver hint, lets copy the regulatory domain the
1472 * driver wanted to the wiphy to deal with conflicts */
1474 BUG_ON(last_request->wiphy->regd);
1476 r = reg_copy_regd(&last_request->wiphy->regd, rd);
1481 cfg80211_regdomain = rd;
1485 /* Intersection requires a bit more work */
1487 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
1489 intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
1490 if (!intersected_rd)
1493 /* We can trash what CRDA provided now.
1494 * However if a driver requested this specific regulatory
1495 * domain we keep it for its private use */
1496 if (last_request->initiator == REGDOM_SET_BY_DRIVER)
1497 last_request->wiphy->regd = rd;
1504 cfg80211_regdomain = intersected_rd;
1510 * Country IE requests are handled a bit differently, we intersect
1511 * the country IE rd with what CRDA believes that country should have
1514 BUG_ON(!country_ie_regdomain);
1516 if (rd != country_ie_regdomain) {
1517 /* Intersect what CRDA returned and our what we
1518 * had built from the Country IE received */
1520 intersected_rd = regdom_intersect(rd, country_ie_regdomain);
1522 reg_country_ie_process_debug(rd, country_ie_regdomain,
1525 kfree(country_ie_regdomain);
1526 country_ie_regdomain = NULL;
1528 /* This would happen when CRDA was not present and
1529 * OLD_REGULATORY was enabled. We intersect our Country
1530 * IE rd and what was set on cfg80211 originally */
1531 intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
1534 if (!intersected_rd)
1537 drv = wiphy_to_dev(wiphy);
1539 drv->country_ie_alpha2[0] = rd->alpha2[0];
1540 drv->country_ie_alpha2[1] = rd->alpha2[1];
1541 drv->env = last_request->country_ie_env;
1543 BUG_ON(intersected_rd == rd);
1549 cfg80211_regdomain = intersected_rd;
1555 /* Use this call to set the current regulatory domain. Conflicts with
1556 * multiple drivers can be ironed out later. Caller must've already
1557 * kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */
1558 int set_regdom(const struct ieee80211_regdomain *rd)
1562 /* Note that this doesn't update the wiphys, this is done below */
1563 r = __set_regdom(rd);
1569 /* This would make this whole thing pointless */
1570 if (!last_request->intersect)
1571 BUG_ON(rd != cfg80211_regdomain);
1573 /* update all wiphys now with the new established regulatory domain */
1574 update_all_wiphy_regulatory(last_request->initiator);
1576 print_regdomain(cfg80211_regdomain);
1581 /* Caller must hold cfg80211_drv_mutex */
1582 void reg_device_remove(struct wiphy *wiphy)
1585 if (!last_request || !last_request->wiphy)
1587 if (last_request->wiphy != wiphy)
1589 last_request->wiphy = NULL;
1590 last_request->country_ie_env = ENVIRON_ANY;
1593 int regulatory_init(void)
1597 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
1598 if (IS_ERR(reg_pdev))
1599 return PTR_ERR(reg_pdev);
1601 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
1602 cfg80211_regdomain = static_regdom(ieee80211_regdom);
1604 printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
1605 print_regdomain_info(cfg80211_regdomain);
1606 /* The old code still requests for a new regdomain and if
1607 * you have CRDA you get it updated, otherwise you get
1608 * stuck with the static values. We ignore "EU" code as
1609 * that is not a valid ISO / IEC 3166 alpha2 */
1610 if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
1611 err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
1612 ieee80211_regdom, 0, ENVIRON_ANY);
1614 cfg80211_regdomain = cfg80211_world_regdom;
1616 err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", 0, ENVIRON_ANY);
1618 printk(KERN_ERR "cfg80211: calling CRDA failed - "
1619 "unable to update world regulatory domain, "
1620 "using static definition\n");
1626 void regulatory_exit(void)
1628 mutex_lock(&cfg80211_drv_mutex);
1632 kfree(country_ie_regdomain);
1633 country_ie_regdomain = NULL;
1635 kfree(last_request);
1637 platform_device_unregister(reg_pdev);
1639 mutex_unlock(&cfg80211_drv_mutex);