[go: nahoru, domu]
regd.c revision a44ea6ffbbf716cca9c2abaa4a3a3a9a9ce7c75a 
1/*
2 * Copyright (c) 2008-2009 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/kernel.h>
20#include <linux/export.h>
21#include <net/cfg80211.h>
22#include <net/mac80211.h>
23#include "regd.h"
24#include "regd_common.h"
25
26static int __ath_regd_init(struct ath_regulatory *reg);
27
28/*
29 * This is a set of common rules used by our world regulatory domains.
30 * We have 12 world regulatory domains. To save space we consolidate
31 * the regulatory domains in 5 structures by frequency and change
32 * the flags on our reg_notifier() on a case by case basis.
33 */
34
35/* Only these channels all allow active scan on all world regulatory domains */
36#define ATH9K_2GHZ_CH01_11	REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
37
38/* We enable active scan on these a case by case basis by regulatory domain */
39#define ATH9K_2GHZ_CH12_13	REG_RULE(2467-10, 2472+10, 40, 0, 20,\
40					 NL80211_RRF_NO_IR)
41#define ATH9K_2GHZ_CH14		REG_RULE(2484-10, 2484+10, 40, 0, 20,\
42					 NL80211_RRF_NO_IR | \
43					 NL80211_RRF_NO_OFDM)
44
45/* We allow IBSS on these on a case by case basis by regulatory domain */
46#define ATH9K_5GHZ_5150_5350	REG_RULE(5150-10, 5350+10, 80, 0, 30,\
47					 NL80211_RRF_NO_IR)
48#define ATH9K_5GHZ_5470_5850	REG_RULE(5470-10, 5850+10, 80, 0, 30,\
49					 NL80211_RRF_NO_IR)
50#define ATH9K_5GHZ_5725_5850	REG_RULE(5725-10, 5850+10, 80, 0, 30,\
51					 NL80211_RRF_NO_IR)
52
53#define ATH9K_2GHZ_ALL		ATH9K_2GHZ_CH01_11, \
54				ATH9K_2GHZ_CH12_13, \
55				ATH9K_2GHZ_CH14
56
57#define ATH9K_5GHZ_ALL		ATH9K_5GHZ_5150_5350, \
58				ATH9K_5GHZ_5470_5850
59
60/* This one skips what we call "mid band" */
61#define ATH9K_5GHZ_NO_MIDBAND	ATH9K_5GHZ_5150_5350, \
62				ATH9K_5GHZ_5725_5850
63
64/* Can be used for:
65 * 0x60, 0x61, 0x62 */
66static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = {
67	.n_reg_rules = 5,
68	.alpha2 =  "99",
69	.reg_rules = {
70		ATH9K_2GHZ_ALL,
71		ATH9K_5GHZ_ALL,
72	}
73};
74
75/* Can be used by 0x63 and 0x65 */
76static const struct ieee80211_regdomain ath_world_regdom_63_65 = {
77	.n_reg_rules = 4,
78	.alpha2 =  "99",
79	.reg_rules = {
80		ATH9K_2GHZ_CH01_11,
81		ATH9K_2GHZ_CH12_13,
82		ATH9K_5GHZ_NO_MIDBAND,
83	}
84};
85
86/* Can be used by 0x64 only */
87static const struct ieee80211_regdomain ath_world_regdom_64 = {
88	.n_reg_rules = 3,
89	.alpha2 =  "99",
90	.reg_rules = {
91		ATH9K_2GHZ_CH01_11,
92		ATH9K_5GHZ_NO_MIDBAND,
93	}
94};
95
96/* Can be used by 0x66 and 0x69 */
97static const struct ieee80211_regdomain ath_world_regdom_66_69 = {
98	.n_reg_rules = 3,
99	.alpha2 =  "99",
100	.reg_rules = {
101		ATH9K_2GHZ_CH01_11,
102		ATH9K_5GHZ_ALL,
103	}
104};
105
106/* Can be used by 0x67, 0x68, 0x6A and 0x6C */
107static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = {
108	.n_reg_rules = 4,
109	.alpha2 =  "99",
110	.reg_rules = {
111		ATH9K_2GHZ_CH01_11,
112		ATH9K_2GHZ_CH12_13,
113		ATH9K_5GHZ_ALL,
114	}
115};
116
117static bool dynamic_country_user_possible(struct ath_regulatory *reg)
118{
119	if (config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_CERT_TESTING))
120		return true;
121
122	switch (reg->country_code) {
123	case CTRY_UNITED_STATES:
124	case CTRY_JAPAN1:
125	case CTRY_JAPAN2:
126	case CTRY_JAPAN3:
127	case CTRY_JAPAN4:
128	case CTRY_JAPAN5:
129	case CTRY_JAPAN6:
130	case CTRY_JAPAN7:
131	case CTRY_JAPAN8:
132	case CTRY_JAPAN9:
133	case CTRY_JAPAN10:
134	case CTRY_JAPAN11:
135	case CTRY_JAPAN12:
136	case CTRY_JAPAN13:
137	case CTRY_JAPAN14:
138	case CTRY_JAPAN15:
139	case CTRY_JAPAN16:
140	case CTRY_JAPAN17:
141	case CTRY_JAPAN18:
142	case CTRY_JAPAN19:
143	case CTRY_JAPAN20:
144	case CTRY_JAPAN21:
145	case CTRY_JAPAN22:
146	case CTRY_JAPAN23:
147	case CTRY_JAPAN24:
148	case CTRY_JAPAN25:
149	case CTRY_JAPAN26:
150	case CTRY_JAPAN27:
151	case CTRY_JAPAN28:
152	case CTRY_JAPAN29:
153	case CTRY_JAPAN30:
154	case CTRY_JAPAN31:
155	case CTRY_JAPAN32:
156	case CTRY_JAPAN33:
157	case CTRY_JAPAN34:
158	case CTRY_JAPAN35:
159	case CTRY_JAPAN36:
160	case CTRY_JAPAN37:
161	case CTRY_JAPAN38:
162	case CTRY_JAPAN39:
163	case CTRY_JAPAN40:
164	case CTRY_JAPAN41:
165	case CTRY_JAPAN42:
166	case CTRY_JAPAN43:
167	case CTRY_JAPAN44:
168	case CTRY_JAPAN45:
169	case CTRY_JAPAN46:
170	case CTRY_JAPAN47:
171	case CTRY_JAPAN48:
172	case CTRY_JAPAN49:
173	case CTRY_JAPAN50:
174	case CTRY_JAPAN51:
175	case CTRY_JAPAN52:
176	case CTRY_JAPAN53:
177	case CTRY_JAPAN54:
178	case CTRY_JAPAN55:
179	case CTRY_JAPAN56:
180	case CTRY_JAPAN57:
181	case CTRY_JAPAN58:
182	case CTRY_JAPAN59:
183		return false;
184	}
185
186	return true;
187}
188
189static inline bool is_wwr_sku(u16 regd)
190{
191	return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
192		(((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
193		(regd == WORLD));
194}
195
196static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
197{
198	return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
199}
200
201bool ath_is_world_regd(struct ath_regulatory *reg)
202{
203	return is_wwr_sku(ath_regd_get_eepromRD(reg));
204}
205EXPORT_SYMBOL(ath_is_world_regd);
206
207static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
208{
209	/* this is the most restrictive */
210	return &ath_world_regdom_64;
211}
212
213static const struct
214ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
215{
216	switch (reg->regpair->regDmnEnum) {
217	case 0x60:
218	case 0x61:
219	case 0x62:
220		return &ath_world_regdom_60_61_62;
221	case 0x63:
222	case 0x65:
223		return &ath_world_regdom_63_65;
224	case 0x64:
225		return &ath_world_regdom_64;
226	case 0x66:
227	case 0x69:
228		return &ath_world_regdom_66_69;
229	case 0x67:
230	case 0x68:
231	case 0x6A:
232	case 0x6C:
233		return &ath_world_regdom_67_68_6A_6C;
234	default:
235		WARN_ON(1);
236		return ath_default_world_regdomain();
237	}
238}
239
240bool ath_is_49ghz_allowed(u16 regdomain)
241{
242	/* possibly more */
243	return regdomain == MKK9_MKKC;
244}
245EXPORT_SYMBOL(ath_is_49ghz_allowed);
246
247/* Frequency is one where radar detection is required */
248static bool ath_is_radar_freq(u16 center_freq)
249{
250	return (center_freq >= 5260 && center_freq <= 5700);
251}
252
253static void ath_force_clear_no_ir_chan(struct wiphy *wiphy,
254				       struct ieee80211_channel *ch)
255{
256	const struct ieee80211_reg_rule *reg_rule;
257
258	reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
259	if (IS_ERR(reg_rule))
260		return;
261
262	if (!(reg_rule->flags & NL80211_RRF_NO_IR))
263		if (ch->flags & IEEE80211_CHAN_NO_IR)
264			ch->flags &= ~IEEE80211_CHAN_NO_IR;
265}
266
267static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
268{
269	struct ieee80211_channel *ch;
270
271	ch = ieee80211_get_channel(wiphy, center_freq);
272	if (!ch)
273		return;
274
275	ath_force_clear_no_ir_chan(wiphy, ch);
276}
277
278static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
279{
280	ch->flags |= IEEE80211_CHAN_NO_IR;
281}
282
283static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
284{
285	struct ieee80211_channel *ch;
286
287	ch = ieee80211_get_channel(wiphy, center_freq);
288	if (!ch)
289		return;
290
291	ath_force_no_ir_chan(ch);
292}
293
294static void
295__ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
296				enum nl80211_reg_initiator initiator,
297				struct ieee80211_channel *ch)
298{
299	if (ath_is_radar_freq(ch->center_freq) ||
300	    (ch->flags & IEEE80211_CHAN_RADAR))
301		return;
302
303	switch (initiator) {
304	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
305		ath_force_clear_no_ir_chan(wiphy, ch);
306		break;
307	default:
308		if (ch->beacon_found)
309			ch->flags &= ~IEEE80211_CHAN_NO_IR;
310	}
311}
312
313/*
314 * These exception rules do not apply radar frequencies.
315 *
316 * - We enable initiating radiation if the country IE says its fine:
317 * - If no country IE has been processed and a we determine we have
318 *   received a beacon on a channel we can enable initiating radiation.
319 */
320static void
321ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
322			      enum nl80211_reg_initiator initiator)
323{
324	enum ieee80211_band band;
325	struct ieee80211_supported_band *sband;
326	struct ieee80211_channel *ch;
327	unsigned int i;
328
329	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
330		if (!wiphy->bands[band])
331			continue;
332		sband = wiphy->bands[band];
333		for (i = 0; i < sband->n_channels; i++) {
334			ch = &sband->channels[i];
335			__ath_reg_apply_beaconing_flags(wiphy, initiator, ch);
336
337		}
338	}
339}
340
341/**
342 * ath_reg_apply_ir_flags()
343 * @wiphy: the wiphy to use
344 * @initiator: the regulatory hint initiator
345 *
346 * If no country IE has been received always enable passive scan
347 * and no-ibss on these channels. This is only done for specific
348 * regulatory SKUs.
349 *
350 * If a country IE has been received check its rule for this
351 * channel first before enabling active scan. The passive scan
352 * would have been enforced by the initial processing of our
353 * custom regulatory domain.
354 */
355static void
356ath_reg_apply_ir_flags(struct wiphy *wiphy,
357				enum nl80211_reg_initiator initiator)
358{
359	struct ieee80211_supported_band *sband;
360
361	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
362	if (!sband)
363		return;
364
365	switch(initiator) {
366	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
367		ath_force_clear_no_ir_freq(wiphy, 2467);
368		ath_force_clear_no_ir_freq(wiphy, 2472);
369		break;
370	default:
371		ath_force_no_ir_freq(wiphy, 2467);
372		ath_force_no_ir_freq(wiphy, 2472);
373	}
374}
375
376/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
377static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
378{
379	struct ieee80211_supported_band *sband;
380	struct ieee80211_channel *ch;
381	unsigned int i;
382
383	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
384		return;
385
386	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
387
388	for (i = 0; i < sband->n_channels; i++) {
389		ch = &sband->channels[i];
390		if (!ath_is_radar_freq(ch->center_freq))
391			continue;
392		/* We always enable radar detection/DFS on this
393		 * frequency range. Additionally we also apply on
394		 * this frequency range:
395		 * - If STA mode does not yet have DFS supports disable
396		 *   active scanning
397		 * - If adhoc mode does not support DFS yet then
398		 *   disable adhoc in the frequency.
399		 * - If AP mode does not yet support radar detection/DFS
400		 *   do not allow AP mode
401		 */
402		if (!(ch->flags & IEEE80211_CHAN_DISABLED))
403			ch->flags |= IEEE80211_CHAN_RADAR |
404				     IEEE80211_CHAN_NO_IR;
405	}
406}
407
408static void ath_reg_apply_world_flags(struct wiphy *wiphy,
409				      enum nl80211_reg_initiator initiator,
410				      struct ath_regulatory *reg)
411{
412	switch (reg->regpair->regDmnEnum) {
413	case 0x60:
414	case 0x63:
415	case 0x66:
416	case 0x67:
417	case 0x6C:
418		ath_reg_apply_beaconing_flags(wiphy, initiator);
419		break;
420	case 0x68:
421		ath_reg_apply_beaconing_flags(wiphy, initiator);
422		ath_reg_apply_ir_flags(wiphy, initiator);
423		break;
424	}
425}
426
427static u16 ath_regd_find_country_by_name(char *alpha2)
428{
429	unsigned int i;
430
431	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
432		if (!memcmp(allCountries[i].isoName, alpha2, 2))
433			return allCountries[i].countryCode;
434	}
435
436	return -1;
437}
438
439static int __ath_reg_dyn_country(struct wiphy *wiphy,
440				 struct ath_regulatory *reg,
441				 struct regulatory_request *request)
442{
443	u16 country_code;
444
445	if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
446	    !ath_is_world_regd(reg))
447		return -EINVAL;
448
449	country_code = ath_regd_find_country_by_name(request->alpha2);
450	if (country_code == (u16) -1)
451		return -EINVAL;
452
453	reg->current_rd = COUNTRY_ERD_FLAG;
454	reg->current_rd |= country_code;
455
456	__ath_regd_init(reg);
457
458	ath_reg_apply_world_flags(wiphy, request->initiator, reg);
459
460	return 0;
461}
462
463static void ath_reg_dyn_country(struct wiphy *wiphy,
464				struct ath_regulatory *reg,
465				struct regulatory_request *request)
466{
467	if (__ath_reg_dyn_country(wiphy, reg, request))
468		return;
469
470	printk(KERN_DEBUG "ath: regdomain 0x%0x "
471			  "dynamically updated by %s\n",
472	       reg->current_rd,
473	       reg_initiator_name(request->initiator));
474}
475
476static void ath_reg_dyn_country_user(struct wiphy *wiphy,
477				     struct ath_regulatory *reg,
478				     struct regulatory_request *request)
479{
480	if (!config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS))
481		return;
482	if (!dynamic_country_user_possible(reg))
483		return;
484	ath_reg_dyn_country(wiphy, reg, request);
485}
486
487void ath_reg_notifier_apply(struct wiphy *wiphy,
488			    struct regulatory_request *request,
489			    struct ath_regulatory *reg)
490{
491	struct ath_common *common = container_of(reg, struct ath_common,
492						 regulatory);
493	/* We always apply this */
494	ath_reg_apply_radar_flags(wiphy);
495
496	/*
497	 * This would happen when we have sent a custom regulatory request
498	 * a world regulatory domain and the scheduler hasn't yet processed
499	 * any pending requests in the queue.
500	 */
501	if (!request)
502		return;
503
504	switch (request->initiator) {
505	case NL80211_REGDOM_SET_BY_CORE:
506		/*
507		 * If common->reg_world_copy is world roaming it means we *were*
508		 * world roaming... so we now have to restore that data.
509		 */
510		if (!ath_is_world_regd(&common->reg_world_copy))
511			break;
512
513		memcpy(reg, &common->reg_world_copy,
514		       sizeof(struct ath_regulatory));
515		break;
516	case NL80211_REGDOM_SET_BY_DRIVER:
517		break;
518	case NL80211_REGDOM_SET_BY_USER:
519		ath_reg_dyn_country_user(wiphy, reg, request);
520		break;
521	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
522		ath_reg_dyn_country(wiphy, reg, request);
523		break;
524	}
525}
526EXPORT_SYMBOL(ath_reg_notifier_apply);
527
528static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
529{
530	u16 rd = ath_regd_get_eepromRD(reg);
531	int i;
532
533	if (rd & COUNTRY_ERD_FLAG) {
534		/* EEPROM value is a country code */
535		u16 cc = rd & ~COUNTRY_ERD_FLAG;
536		printk(KERN_DEBUG
537		       "ath: EEPROM indicates we should expect "
538			"a country code\n");
539		for (i = 0; i < ARRAY_SIZE(allCountries); i++)
540			if (allCountries[i].countryCode == cc)
541				return true;
542	} else {
543		/* EEPROM value is a regpair value */
544		if (rd != CTRY_DEFAULT)
545			printk(KERN_DEBUG "ath: EEPROM indicates we "
546			       "should expect a direct regpair map\n");
547		for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
548			if (regDomainPairs[i].regDmnEnum == rd)
549				return true;
550	}
551	printk(KERN_DEBUG
552		 "ath: invalid regulatory domain/country code 0x%x\n", rd);
553	return false;
554}
555
556/* EEPROM country code to regpair mapping */
557static struct country_code_to_enum_rd*
558ath_regd_find_country(u16 countryCode)
559{
560	int i;
561
562	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
563		if (allCountries[i].countryCode == countryCode)
564			return &allCountries[i];
565	}
566	return NULL;
567}
568
569/* EEPROM rd code to regpair mapping */
570static struct country_code_to_enum_rd*
571ath_regd_find_country_by_rd(int regdmn)
572{
573	int i;
574
575	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
576		if (allCountries[i].regDmnEnum == regdmn)
577			return &allCountries[i];
578	}
579	return NULL;
580}
581
582/* Returns the map of the EEPROM set RD to a country code */
583static u16 ath_regd_get_default_country(u16 rd)
584{
585	if (rd & COUNTRY_ERD_FLAG) {
586		struct country_code_to_enum_rd *country = NULL;
587		u16 cc = rd & ~COUNTRY_ERD_FLAG;
588
589		country = ath_regd_find_country(cc);
590		if (country != NULL)
591			return cc;
592	}
593
594	return CTRY_DEFAULT;
595}
596
597static struct reg_dmn_pair_mapping*
598ath_get_regpair(int regdmn)
599{
600	int i;
601
602	if (regdmn == NO_ENUMRD)
603		return NULL;
604	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
605		if (regDomainPairs[i].regDmnEnum == regdmn)
606			return &regDomainPairs[i];
607	}
608	return NULL;
609}
610
611static int
612ath_regd_init_wiphy(struct ath_regulatory *reg,
613		    struct wiphy *wiphy,
614		    void (*reg_notifier)(struct wiphy *wiphy,
615					 struct regulatory_request *request))
616{
617	const struct ieee80211_regdomain *regd;
618
619	wiphy->reg_notifier = reg_notifier;
620	wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
621
622	if (ath_is_world_regd(reg)) {
623		/*
624		 * Anything applied here (prior to wiphy registration) gets
625		 * saved on the wiphy orig_* parameters
626		 */
627		regd = ath_world_regdomain(reg);
628		wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
629					   REGULATORY_COUNTRY_IE_FOLLOW_POWER;
630	} else {
631		/*
632		 * This gets applied in the case of the absence of CRDA,
633		 * it's our own custom world regulatory domain, similar to
634		 * cfg80211's but we enable passive scanning.
635		 */
636		regd = ath_default_world_regdomain();
637	}
638	wiphy_apply_custom_regulatory(wiphy, regd);
639	ath_reg_apply_radar_flags(wiphy);
640	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
641	return 0;
642}
643
644/*
645 * Some users have reported their EEPROM programmed with
646 * 0x8000 set, this is not a supported regulatory domain
647 * but since we have more than one user with it we need
648 * a solution for them. We default to 0x64, which is the
649 * default Atheros world regulatory domain.
650 */
651static void ath_regd_sanitize(struct ath_regulatory *reg)
652{
653	if (reg->current_rd != COUNTRY_ERD_FLAG)
654		return;
655	printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
656	reg->current_rd = 0x64;
657}
658
659static int __ath_regd_init(struct ath_regulatory *reg)
660{
661	struct country_code_to_enum_rd *country = NULL;
662	u16 regdmn;
663
664	if (!reg)
665		return -EINVAL;
666
667	ath_regd_sanitize(reg);
668
669	printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
670
671	if (!ath_regd_is_eeprom_valid(reg)) {
672		pr_err("Invalid EEPROM contents\n");
673		return -EINVAL;
674	}
675
676	regdmn = ath_regd_get_eepromRD(reg);
677	reg->country_code = ath_regd_get_default_country(regdmn);
678
679	if (reg->country_code == CTRY_DEFAULT &&
680	    regdmn == CTRY_DEFAULT) {
681		printk(KERN_DEBUG "ath: EEPROM indicates default "
682		       "country code should be used\n");
683		reg->country_code = CTRY_UNITED_STATES;
684	}
685
686	if (reg->country_code == CTRY_DEFAULT) {
687		country = NULL;
688	} else {
689		printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
690		       "map search\n");
691		country = ath_regd_find_country(reg->country_code);
692		if (country == NULL) {
693			printk(KERN_DEBUG
694				"ath: no valid country maps found for "
695				"country code: 0x%0x\n",
696				reg->country_code);
697			return -EINVAL;
698		} else {
699			regdmn = country->regDmnEnum;
700			printk(KERN_DEBUG "ath: country maps to "
701			       "regdmn code: 0x%0x\n",
702			       regdmn);
703		}
704	}
705
706	reg->regpair = ath_get_regpair(regdmn);
707
708	if (!reg->regpair) {
709		printk(KERN_DEBUG "ath: "
710			"No regulatory domain pair found, cannot continue\n");
711		return -EINVAL;
712	}
713
714	if (!country)
715		country = ath_regd_find_country_by_rd(regdmn);
716
717	if (country) {
718		reg->alpha2[0] = country->isoName[0];
719		reg->alpha2[1] = country->isoName[1];
720	} else {
721		reg->alpha2[0] = '0';
722		reg->alpha2[1] = '0';
723	}
724
725	printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
726		reg->alpha2[0], reg->alpha2[1]);
727	printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
728		reg->regpair->regDmnEnum);
729
730	return 0;
731}
732
733int
734ath_regd_init(struct ath_regulatory *reg,
735	      struct wiphy *wiphy,
736	      void (*reg_notifier)(struct wiphy *wiphy,
737				   struct regulatory_request *request))
738{
739	struct ath_common *common = container_of(reg, struct ath_common,
740						 regulatory);
741	int r;
742
743	r = __ath_regd_init(reg);
744	if (r)
745		return r;
746
747	if (ath_is_world_regd(reg))
748		memcpy(&common->reg_world_copy, reg,
749		       sizeof(struct ath_regulatory));
750
751	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
752
753	return 0;
754}
755EXPORT_SYMBOL(ath_regd_init);
756
757u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
758			  enum ieee80211_band band)
759{
760	if (!reg->regpair ||
761	    (reg->country_code == CTRY_DEFAULT &&
762	     is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
763		return SD_NO_CTL;
764	}
765
766	switch (band) {
767	case IEEE80211_BAND_2GHZ:
768		return reg->regpair->reg_2ghz_ctl;
769	case IEEE80211_BAND_5GHZ:
770		return reg->regpair->reg_5ghz_ctl;
771	default:
772		return NO_CTL;
773	}
774}
775EXPORT_SYMBOL(ath_regd_get_band_ctl);
776