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>
46 * struct regulatory_request - receipt of last regulatory request
48 * @wiphy: this is set if this request's initiator is
49 * %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
50 * can be used by the wireless core to deal with conflicts
51 * and potentially inform users of which devices specifically
52 * cased the conflicts.
53 * @initiator: indicates who sent this request, could be any of
54 * of those set in reg_set_by, %REGDOM_SET_BY_*
55 * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
56 * regulatory domain. We have a few special codes:
57 * 00 - World regulatory domain
58 * 99 - built by driver but a specific alpha2 cannot be determined
59 * 98 - result of an intersection between two regulatory domains
60 * @intersect: indicates whether the wireless core should intersect
61 * the requested regulatory domain with the presently set regulatory
64 struct regulatory_request {
66 enum reg_set_by initiator;
71 /* Receipt of information from last regulatory request */
72 static struct regulatory_request *last_request;
74 /* To trigger userspace events */
75 static struct platform_device *reg_pdev;
77 /* Keep the ordering from large to small */
78 static u32 supported_bandwidths[] = {
83 /* Central wireless core regulatory domains, we only need two,
84 * the current one and a world regulatory domain in case we have no
85 * information to give us an alpha2 */
86 static const struct ieee80211_regdomain *cfg80211_regdomain;
88 /* We keep a static world regulatory domain in case of the absence of CRDA */
89 static const struct ieee80211_regdomain world_regdom = {
93 REG_RULE(2412-10, 2462+10, 40, 6, 20,
94 NL80211_RRF_PASSIVE_SCAN |
99 static const struct ieee80211_regdomain *cfg80211_world_regdom =
102 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
103 static char *ieee80211_regdom = "US";
104 module_param(ieee80211_regdom, charp, 0444);
105 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
107 /* We assume 40 MHz bandwidth for the old regulatory work.
108 * We make emphasis we are using the exact same frequencies
111 static const struct ieee80211_regdomain us_regdom = {
115 /* IEEE 802.11b/g, channels 1..11 */
116 REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
117 /* IEEE 802.11a, channel 36 */
118 REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
119 /* IEEE 802.11a, channel 40 */
120 REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
121 /* IEEE 802.11a, channel 44 */
122 REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
123 /* IEEE 802.11a, channels 48..64 */
124 REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
125 /* IEEE 802.11a, channels 149..165, outdoor */
126 REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
130 static const struct ieee80211_regdomain jp_regdom = {
134 /* IEEE 802.11b/g, channels 1..14 */
135 REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
136 /* IEEE 802.11a, channels 34..48 */
137 REG_RULE(5170-10, 5240+10, 40, 6, 20,
138 NL80211_RRF_PASSIVE_SCAN),
139 /* IEEE 802.11a, channels 52..64 */
140 REG_RULE(5260-10, 5320+10, 40, 6, 20,
141 NL80211_RRF_NO_IBSS |
146 static const struct ieee80211_regdomain eu_regdom = {
148 /* This alpha2 is bogus, we leave it here just for stupid
149 * backward compatibility */
152 /* IEEE 802.11b/g, channels 1..13 */
153 REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
154 /* IEEE 802.11a, channel 36 */
155 REG_RULE(5180-10, 5180+10, 40, 6, 23,
156 NL80211_RRF_PASSIVE_SCAN),
157 /* IEEE 802.11a, channel 40 */
158 REG_RULE(5200-10, 5200+10, 40, 6, 23,
159 NL80211_RRF_PASSIVE_SCAN),
160 /* IEEE 802.11a, channel 44 */
161 REG_RULE(5220-10, 5220+10, 40, 6, 23,
162 NL80211_RRF_PASSIVE_SCAN),
163 /* IEEE 802.11a, channels 48..64 */
164 REG_RULE(5240-10, 5320+10, 40, 6, 20,
165 NL80211_RRF_NO_IBSS |
167 /* IEEE 802.11a, channels 100..140 */
168 REG_RULE(5500-10, 5700+10, 40, 6, 30,
169 NL80211_RRF_NO_IBSS |
174 static const struct ieee80211_regdomain *static_regdom(char *alpha2)
176 if (alpha2[0] == 'U' && alpha2[1] == 'S')
178 if (alpha2[0] == 'J' && alpha2[1] == 'P')
180 if (alpha2[0] == 'E' && alpha2[1] == 'U')
182 /* Default, as per the old rules */
186 static bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
188 if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
193 static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd)
199 static void reset_regdomains(void)
201 /* avoid freeing static information or freeing something twice */
202 if (cfg80211_regdomain == cfg80211_world_regdom)
203 cfg80211_regdomain = NULL;
204 if (cfg80211_world_regdom == &world_regdom)
205 cfg80211_world_regdom = NULL;
206 if (cfg80211_regdomain == &world_regdom)
207 cfg80211_regdomain = NULL;
208 if (is_old_static_regdom(cfg80211_regdomain))
209 cfg80211_regdomain = NULL;
211 kfree(cfg80211_regdomain);
212 kfree(cfg80211_world_regdom);
214 cfg80211_world_regdom = &world_regdom;
215 cfg80211_regdomain = NULL;
218 /* Dynamic world regulatory domain requested by the wireless
219 * core upon initialization */
220 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
222 BUG_ON(!last_request);
226 cfg80211_world_regdom = rd;
227 cfg80211_regdomain = rd;
230 bool is_world_regdom(const char *alpha2)
234 if (alpha2[0] == '0' && alpha2[1] == '0')
239 static bool is_alpha2_set(const char *alpha2)
243 if (alpha2[0] != 0 && alpha2[1] != 0)
248 static bool is_alpha_upper(char letter)
251 if (letter >= 65 && letter <= 90)
256 static bool is_unknown_alpha2(const char *alpha2)
260 /* Special case where regulatory domain was built by driver
261 * but a specific alpha2 cannot be determined */
262 if (alpha2[0] == '9' && alpha2[1] == '9')
267 static bool is_an_alpha2(const char *alpha2)
271 if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1]))
276 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
278 if (!alpha2_x || !alpha2_y)
280 if (alpha2_x[0] == alpha2_y[0] &&
281 alpha2_x[1] == alpha2_y[1])
286 static bool regdom_changed(const char *alpha2)
288 if (!cfg80211_regdomain)
290 if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
295 /* This lets us keep regulatory code which is updated on a regulatory
296 * basis in userspace. */
297 static int call_crda(const char *alpha2)
299 char country_env[9 + 2] = "COUNTRY=";
305 if (!is_world_regdom((char *) alpha2))
306 printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n",
307 alpha2[0], alpha2[1]);
309 printk(KERN_INFO "cfg80211: Calling CRDA to update world "
310 "regulatory domain\n");
312 country_env[8] = alpha2[0];
313 country_env[9] = alpha2[1];
315 return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp);
318 /* Used by nl80211 before kmalloc'ing our regulatory domain */
319 bool reg_is_valid_request(const char *alpha2)
324 return alpha2_equal(last_request->alpha2, alpha2);
327 /* Sanity check on a regulatory rule */
328 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
330 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
333 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
336 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
339 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
341 if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff)
347 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
349 const struct ieee80211_reg_rule *reg_rule = NULL;
352 if (!rd->n_reg_rules)
355 for (i = 0; i < rd->n_reg_rules; i++) {
356 reg_rule = &rd->reg_rules[i];
357 if (!is_valid_reg_rule(reg_rule))
364 /* Returns value in KHz */
365 static u32 freq_max_bandwidth(const struct ieee80211_freq_range *freq_range,
369 for (i = 0; i < ARRAY_SIZE(supported_bandwidths); i++) {
370 u32 start_freq_khz = freq - supported_bandwidths[i]/2;
371 u32 end_freq_khz = freq + supported_bandwidths[i]/2;
372 if (start_freq_khz >= freq_range->start_freq_khz &&
373 end_freq_khz <= freq_range->end_freq_khz)
374 return supported_bandwidths[i];
379 /* Helper for regdom_intersect(), this does the real
380 * mathematical intersection fun */
381 static int reg_rules_intersect(
382 const struct ieee80211_reg_rule *rule1,
383 const struct ieee80211_reg_rule *rule2,
384 struct ieee80211_reg_rule *intersected_rule)
386 const struct ieee80211_freq_range *freq_range1, *freq_range2;
387 struct ieee80211_freq_range *freq_range;
388 const struct ieee80211_power_rule *power_rule1, *power_rule2;
389 struct ieee80211_power_rule *power_rule;
392 freq_range1 = &rule1->freq_range;
393 freq_range2 = &rule2->freq_range;
394 freq_range = &intersected_rule->freq_range;
396 power_rule1 = &rule1->power_rule;
397 power_rule2 = &rule2->power_rule;
398 power_rule = &intersected_rule->power_rule;
400 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
401 freq_range2->start_freq_khz);
402 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
403 freq_range2->end_freq_khz);
404 freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
405 freq_range2->max_bandwidth_khz);
407 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
408 if (freq_range->max_bandwidth_khz > freq_diff)
409 freq_range->max_bandwidth_khz = freq_diff;
411 power_rule->max_eirp = min(power_rule1->max_eirp,
412 power_rule2->max_eirp);
413 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
414 power_rule2->max_antenna_gain);
416 intersected_rule->flags = (rule1->flags | rule2->flags);
418 if (!is_valid_reg_rule(intersected_rule))
425 * regdom_intersect - do the intersection between two regulatory domains
426 * @rd1: first regulatory domain
427 * @rd2: second regulatory domain
429 * Use this function to get the intersection between two regulatory domains.
430 * Once completed we will mark the alpha2 for the rd as intersected, "98",
431 * as no one single alpha2 can represent this regulatory domain.
433 * Returns a pointer to the regulatory domain structure which will hold the
434 * resulting intersection of rules between rd1 and rd2. We will
435 * kzalloc() this structure for you.
437 static struct ieee80211_regdomain *regdom_intersect(
438 const struct ieee80211_regdomain *rd1,
439 const struct ieee80211_regdomain *rd2)
443 unsigned int num_rules = 0, rule_idx = 0;
444 const struct ieee80211_reg_rule *rule1, *rule2;
445 struct ieee80211_reg_rule *intersected_rule;
446 struct ieee80211_regdomain *rd;
447 /* This is just a dummy holder to help us count */
448 struct ieee80211_reg_rule irule;
450 /* Uses the stack temporarily for counter arithmetic */
451 intersected_rule = &irule;
453 memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule));
458 /* First we get a count of the rules we'll need, then we actually
459 * build them. This is to so we can malloc() and free() a
460 * regdomain once. The reason we use reg_rules_intersect() here
461 * is it will return -EINVAL if the rule computed makes no sense.
462 * All rules that do check out OK are valid. */
464 for (x = 0; x < rd1->n_reg_rules; x++) {
465 rule1 = &rd1->reg_rules[x];
466 for (y = 0; y < rd2->n_reg_rules; y++) {
467 rule2 = &rd2->reg_rules[y];
468 if (!reg_rules_intersect(rule1, rule2,
471 memset(intersected_rule, 0,
472 sizeof(struct ieee80211_reg_rule));
479 size_of_regd = sizeof(struct ieee80211_regdomain) +
480 ((num_rules + 1) * sizeof(struct ieee80211_reg_rule));
482 rd = kzalloc(size_of_regd, GFP_KERNEL);
486 for (x = 0; x < rd1->n_reg_rules; x++) {
487 rule1 = &rd1->reg_rules[x];
488 for (y = 0; y < rd2->n_reg_rules; y++) {
489 rule2 = &rd2->reg_rules[y];
490 /* This time around instead of using the stack lets
491 * write to the target rule directly saving ourselves
493 intersected_rule = &rd->reg_rules[rule_idx];
494 r = reg_rules_intersect(rule1, rule2,
496 /* No need to memset here the intersected rule here as
497 * we're not using the stack anymore */
504 if (rule_idx != num_rules) {
509 rd->n_reg_rules = num_rules;
516 /* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
517 * want to just have the channel structure use these */
518 static u32 map_regdom_flags(u32 rd_flags)
520 u32 channel_flags = 0;
521 if (rd_flags & NL80211_RRF_PASSIVE_SCAN)
522 channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN;
523 if (rd_flags & NL80211_RRF_NO_IBSS)
524 channel_flags |= IEEE80211_CHAN_NO_IBSS;
525 if (rd_flags & NL80211_RRF_DFS)
526 channel_flags |= IEEE80211_CHAN_RADAR;
527 return channel_flags;
531 * freq_reg_info - get regulatory information for the given frequency
532 * @center_freq: Frequency in KHz for which we want regulatory information for
533 * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one
534 * you can set this to 0. If this frequency is allowed we then set
535 * this value to the maximum allowed bandwidth.
536 * @reg_rule: the regulatory rule which we have for this frequency
538 * Use this function to get the regulatory rule for a specific frequency.
540 static int freq_reg_info(u32 center_freq, u32 *bandwidth,
541 const struct ieee80211_reg_rule **reg_rule)
544 u32 max_bandwidth = 0;
546 if (!cfg80211_regdomain)
549 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
550 const struct ieee80211_reg_rule *rr;
551 const struct ieee80211_freq_range *fr = NULL;
552 const struct ieee80211_power_rule *pr = NULL;
554 rr = &cfg80211_regdomain->reg_rules[i];
555 fr = &rr->freq_range;
556 pr = &rr->power_rule;
557 max_bandwidth = freq_max_bandwidth(fr, center_freq);
558 if (max_bandwidth && *bandwidth <= max_bandwidth) {
560 *bandwidth = max_bandwidth;
565 return !max_bandwidth;
568 static void handle_channel(struct ieee80211_channel *chan)
571 u32 flags = chan->orig_flags;
572 u32 max_bandwidth = 0;
573 const struct ieee80211_reg_rule *reg_rule = NULL;
574 const struct ieee80211_power_rule *power_rule = NULL;
576 r = freq_reg_info(MHZ_TO_KHZ(chan->center_freq),
577 &max_bandwidth, ®_rule);
580 flags |= IEEE80211_CHAN_DISABLED;
585 power_rule = ®_rule->power_rule;
587 chan->flags = flags | map_regdom_flags(reg_rule->flags);
588 chan->max_antenna_gain = min(chan->orig_mag,
589 (int) MBI_TO_DBI(power_rule->max_antenna_gain));
590 chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);
592 chan->max_power = min(chan->orig_mpwr,
593 (int) MBM_TO_DBM(power_rule->max_eirp));
595 chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
598 static void handle_band(struct ieee80211_supported_band *sband)
602 for (i = 0; i < sband->n_channels; i++)
603 handle_channel(&sband->channels[i]);
606 static void update_all_wiphy_regulatory(enum reg_set_by setby)
608 struct cfg80211_registered_device *drv;
610 list_for_each_entry(drv, &cfg80211_drv_list, list)
611 wiphy_update_regulatory(&drv->wiphy, setby);
614 void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
616 enum ieee80211_band band;
617 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
618 if (wiphy->bands[band])
619 handle_band(wiphy->bands[band]);
620 if (wiphy->reg_notifier)
621 wiphy->reg_notifier(wiphy, setby);
625 /* Return value which can be used by ignore_request() to indicate
626 * it has been determined we should intersect two regulatory domains */
627 #define REG_INTERSECT 1
629 /* This has the logic which determines when a new request
630 * should be ignored. */
631 static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
634 /* All initial requests are respected */
639 case REGDOM_SET_BY_INIT:
641 case REGDOM_SET_BY_CORE:
643 * Always respect new wireless core hints, should only happen
644 * when updating the world regulatory domain at init.
647 case REGDOM_SET_BY_COUNTRY_IE:
648 if (unlikely(!is_an_alpha2(alpha2)))
650 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE) {
651 if (last_request->wiphy != wiphy) {
653 * Two cards with two APs claiming different
654 * different Country IE alpha2s. We could
655 * intersect them, but that seems unlikely
656 * to be correct. Reject second one for now.
658 if (!alpha2_equal(alpha2,
659 cfg80211_regdomain->alpha2))
663 /* Two consecutive Country IE hints on the same wiphy */
664 if (!alpha2_equal(cfg80211_regdomain->alpha2, alpha2))
669 * Ignore Country IE hints for now, need to think about
670 * what we need to do to support multi-domain operation.
673 case REGDOM_SET_BY_DRIVER:
674 if (last_request->initiator == REGDOM_SET_BY_DRIVER)
677 case REGDOM_SET_BY_USER:
678 if (last_request->initiator == REGDOM_SET_BY_COUNTRY_IE)
679 return REG_INTERSECT;
686 /* Caller must hold &cfg80211_drv_mutex */
687 int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
690 struct regulatory_request *request;
691 bool intersect = false;
694 r = ignore_request(wiphy, set_by, alpha2);
696 if (r == REG_INTERSECT)
701 request = kzalloc(sizeof(struct regulatory_request),
706 request->alpha2[0] = alpha2[0];
707 request->alpha2[1] = alpha2[1];
708 request->initiator = set_by;
709 request->wiphy = wiphy;
710 request->intersect = intersect;
713 last_request = request;
714 r = call_crda(alpha2);
716 #ifndef CONFIG_WIRELESS_OLD_REGULATORY
718 printk(KERN_ERR "cfg80211: Failed calling CRDA\n");
724 void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
728 mutex_lock(&cfg80211_drv_mutex);
729 __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2);
730 mutex_unlock(&cfg80211_drv_mutex);
732 EXPORT_SYMBOL(regulatory_hint);
735 static void print_rd_rules(const struct ieee80211_regdomain *rd)
738 const struct ieee80211_reg_rule *reg_rule = NULL;
739 const struct ieee80211_freq_range *freq_range = NULL;
740 const struct ieee80211_power_rule *power_rule = NULL;
742 printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), "
743 "(max_antenna_gain, max_eirp)\n");
745 for (i = 0; i < rd->n_reg_rules; i++) {
746 reg_rule = &rd->reg_rules[i];
747 freq_range = ®_rule->freq_range;
748 power_rule = ®_rule->power_rule;
750 /* There may not be documentation for max antenna gain
751 * in certain regions */
752 if (power_rule->max_antenna_gain)
753 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
754 "(%d mBi, %d mBm)\n",
755 freq_range->start_freq_khz,
756 freq_range->end_freq_khz,
757 freq_range->max_bandwidth_khz,
758 power_rule->max_antenna_gain,
759 power_rule->max_eirp);
761 printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), "
763 freq_range->start_freq_khz,
764 freq_range->end_freq_khz,
765 freq_range->max_bandwidth_khz,
766 power_rule->max_eirp);
770 static void print_regdomain(const struct ieee80211_regdomain *rd)
773 if (is_world_regdom(rd->alpha2))
774 printk(KERN_INFO "cfg80211: World regulatory "
775 "domain updated:\n");
777 if (is_unknown_alpha2(rd->alpha2))
778 printk(KERN_INFO "cfg80211: Regulatory domain "
779 "changed to driver built-in settings "
780 "(unknown country)\n");
782 printk(KERN_INFO "cfg80211: Regulatory domain "
783 "changed to country: %c%c\n",
784 rd->alpha2[0], rd->alpha2[1]);
789 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
791 printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
792 rd->alpha2[0], rd->alpha2[1]);
796 /* Takes ownership of rd only if it doesn't fail */
797 static int __set_regdom(const struct ieee80211_regdomain *rd)
799 const struct ieee80211_regdomain *intersected_rd = NULL;
800 /* Some basic sanity checks first */
802 if (is_world_regdom(rd->alpha2)) {
803 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
805 update_world_regdomain(rd);
809 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
810 !is_unknown_alpha2(rd->alpha2))
816 /* allow overriding the static definitions if CRDA is present */
817 if (!is_old_static_regdom(cfg80211_regdomain) &&
818 !regdom_changed(rd->alpha2))
821 /* Now lets set the regulatory domain, update all driver channels
822 * and finally inform them of what we have done, in case they want
823 * to review or adjust their own settings based on their own
824 * internal EEPROM data */
826 if (WARN_ON(!reg_is_valid_request(rd->alpha2)))
829 if (!is_valid_rd(rd)) {
830 printk(KERN_ERR "cfg80211: Invalid "
831 "regulatory domain detected:\n");
832 print_regdomain_info(rd);
836 if (!last_request->intersect) {
838 cfg80211_regdomain = rd;
842 /* Intersection requires a bit more work */
844 if (last_request->initiator != REGDOM_SET_BY_COUNTRY_IE) {
846 intersected_rd = regdom_intersect(rd, cfg80211_regdomain);
850 /* We can trash what CRDA provided now */
855 cfg80211_regdomain = intersected_rd;
860 /* Country IE parsing coming soon */
868 /* Use this call to set the current regulatory domain. Conflicts with
869 * multiple drivers can be ironed out later. Caller must've already
870 * kmalloc'd the rd structure. Caller must hold cfg80211_drv_mutex */
871 int set_regdom(const struct ieee80211_regdomain *rd)
875 /* Note that this doesn't update the wiphys, this is done below */
876 r = __set_regdom(rd);
882 /* This would make this whole thing pointless */
883 if (!last_request->intersect)
884 BUG_ON(rd != cfg80211_regdomain);
886 /* update all wiphys now with the new established regulatory domain */
887 update_all_wiphy_regulatory(last_request->initiator);
889 print_regdomain(cfg80211_regdomain);
894 int regulatory_init(void)
898 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
899 if (IS_ERR(reg_pdev))
900 return PTR_ERR(reg_pdev);
902 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
903 cfg80211_regdomain = static_regdom(ieee80211_regdom);
905 printk(KERN_INFO "cfg80211: Using static regulatory domain info\n");
906 print_regdomain_info(cfg80211_regdomain);
907 /* The old code still requests for a new regdomain and if
908 * you have CRDA you get it updated, otherwise you get
909 * stuck with the static values. We ignore "EU" code as
910 * that is not a valid ISO / IEC 3166 alpha2 */
911 if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
912 err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
915 cfg80211_regdomain = cfg80211_world_regdom;
917 err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00");
919 printk(KERN_ERR "cfg80211: calling CRDA failed - "
920 "unable to update world regulatory domain, "
921 "using static definition\n");
927 void regulatory_exit(void)
929 mutex_lock(&cfg80211_drv_mutex);
935 platform_device_unregister(reg_pdev);
937 mutex_unlock(&cfg80211_drv_mutex);