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regd.c revision 8fe02e167efa8ed4a4503a5eedc0f49fcb7e3eb9 
140c6d8aee40e373db75e6b0b4230fc8e8259d7a6Sascha Hauer/*
2285f5fa7e9a35e75d9022f9b036ed709721c5cdfDan Williams * Copyright (c) 2008-2009 Atheros Communications Inc.
3285f5fa7e9a35e75d9022f9b036ed709721c5cdfDan Williams *
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 inline bool is_wwr_sku(u16 regd)
118{
119	return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
120		(((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
121		(regd == WORLD));
122}
123
124static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
125{
126	return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
127}
128
129bool ath_is_world_regd(struct ath_regulatory *reg)
130{
131	return is_wwr_sku(ath_regd_get_eepromRD(reg));
132}
133EXPORT_SYMBOL(ath_is_world_regd);
134
135static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
136{
137	/* this is the most restrictive */
138	return &ath_world_regdom_64;
139}
140
141static const struct
142ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
143{
144	switch (reg->regpair->regDmnEnum) {
145	case 0x60:
146	case 0x61:
147	case 0x62:
148		return &ath_world_regdom_60_61_62;
149	case 0x63:
150	case 0x65:
151		return &ath_world_regdom_63_65;
152	case 0x64:
153		return &ath_world_regdom_64;
154	case 0x66:
155	case 0x69:
156		return &ath_world_regdom_66_69;
157	case 0x67:
158	case 0x68:
159	case 0x6A:
160	case 0x6C:
161		return &ath_world_regdom_67_68_6A_6C;
162	default:
163		WARN_ON(1);
164		return ath_default_world_regdomain();
165	}
166}
167
168bool ath_is_49ghz_allowed(u16 regdomain)
169{
170	/* possibly more */
171	return regdomain == MKK9_MKKC;
172}
173EXPORT_SYMBOL(ath_is_49ghz_allowed);
174
175/* Frequency is one where radar detection is required */
176static bool ath_is_radar_freq(u16 center_freq)
177{
178	return (center_freq >= 5260 && center_freq <= 5700);
179}
180
181/*
182 * N.B: These exception rules do not apply radar freqs.
183 *
184 * - We enable adhoc (or beaconing) if allowed by 11d
185 * - We enable active scan if the channel is allowed by 11d
186 * - If no country IE has been processed and a we determine we have
187 *   received a beacon on a channel we can enable active scan and
188 *   adhoc (or beaconing).
189 */
190static void
191ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
192			      enum nl80211_reg_initiator initiator)
193{
194	enum ieee80211_band band;
195	struct ieee80211_supported_band *sband;
196	const struct ieee80211_reg_rule *reg_rule;
197	struct ieee80211_channel *ch;
198	unsigned int i;
199
200	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
201
202		if (!wiphy->bands[band])
203			continue;
204
205		sband = wiphy->bands[band];
206
207		for (i = 0; i < sband->n_channels; i++) {
208
209			ch = &sband->channels[i];
210
211			if (ath_is_radar_freq(ch->center_freq) ||
212			    (ch->flags & IEEE80211_CHAN_RADAR))
213				continue;
214
215			if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
216				reg_rule = freq_reg_info(wiphy, ch->center_freq);
217				if (IS_ERR(reg_rule))
218					continue;
219				/*
220				 * If 11d had a rule for this channel ensure
221				 * we enable adhoc/beaconing if it allows us to
222				 * use it. Note that we would have disabled it
223				 * by applying our static world regdomain by
224				 * default during init, prior to calling our
225				 * regulatory_hint().
226				 */
227				if (!(reg_rule->flags & NL80211_RRF_NO_IR))
228					ch->flags &= ~IEEE80211_CHAN_NO_IR;
229			} else {
230				if (ch->beacon_found)
231					ch->flags &= ~IEEE80211_CHAN_NO_IR;
232			}
233		}
234	}
235
236}
237
238/* Allows active scan scan on Ch 12 and 13 */
239static void
240ath_reg_apply_active_scan_flags(struct wiphy *wiphy,
241				enum nl80211_reg_initiator initiator)
242{
243	struct ieee80211_supported_band *sband;
244	struct ieee80211_channel *ch;
245	const struct ieee80211_reg_rule *reg_rule;
246
247	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
248	if (!sband)
249		return;
250
251	/*
252	 * If no country IE has been received always enable active scan
253	 * on these channels. This is only done for specific regulatory SKUs
254	 */
255	if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
256		ch = &sband->channels[11]; /* CH 12 */
257		if (ch->flags & IEEE80211_CHAN_NO_IR)
258			ch->flags &= ~IEEE80211_CHAN_NO_IR;
259		ch = &sband->channels[12]; /* CH 13 */
260		if (ch->flags & IEEE80211_CHAN_NO_IR)
261			ch->flags &= ~IEEE80211_CHAN_NO_IR;
262		return;
263	}
264
265	/*
266	 * If a country IE has been received check its rule for this
267	 * channel first before enabling active scan. The passive scan
268	 * would have been enforced by the initial processing of our
269	 * custom regulatory domain.
270	 */
271
272	ch = &sband->channels[11]; /* CH 12 */
273	reg_rule = freq_reg_info(wiphy, ch->center_freq);
274	if (!IS_ERR(reg_rule)) {
275		if (!(reg_rule->flags & NL80211_RRF_NO_IR))
276			if (ch->flags & IEEE80211_CHAN_NO_IR)
277				ch->flags &= ~IEEE80211_CHAN_NO_IR;
278	}
279
280	ch = &sband->channels[12]; /* CH 13 */
281	reg_rule = freq_reg_info(wiphy, ch->center_freq);
282	if (!IS_ERR(reg_rule)) {
283		if (!(reg_rule->flags & NL80211_RRF_NO_IR))
284			if (ch->flags & IEEE80211_CHAN_NO_IR)
285				ch->flags &= ~IEEE80211_CHAN_NO_IR;
286	}
287}
288
289/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
290static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
291{
292	struct ieee80211_supported_band *sband;
293	struct ieee80211_channel *ch;
294	unsigned int i;
295
296	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
297		return;
298
299	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
300
301	for (i = 0; i < sband->n_channels; i++) {
302		ch = &sband->channels[i];
303		if (!ath_is_radar_freq(ch->center_freq))
304			continue;
305		/* We always enable radar detection/DFS on this
306		 * frequency range. Additionally we also apply on
307		 * this frequency range:
308		 * - If STA mode does not yet have DFS supports disable
309		 *   active scanning
310		 * - If adhoc mode does not support DFS yet then
311		 *   disable adhoc in the frequency.
312		 * - If AP mode does not yet support radar detection/DFS
313		 *   do not allow AP mode
314		 */
315		if (!(ch->flags & IEEE80211_CHAN_DISABLED))
316			ch->flags |= IEEE80211_CHAN_RADAR |
317				     IEEE80211_CHAN_NO_IR;
318	}
319}
320
321static void ath_reg_apply_world_flags(struct wiphy *wiphy,
322				      enum nl80211_reg_initiator initiator,
323				      struct ath_regulatory *reg)
324{
325	switch (reg->regpair->regDmnEnum) {
326	case 0x60:
327	case 0x63:
328	case 0x66:
329	case 0x67:
330	case 0x6C:
331		ath_reg_apply_beaconing_flags(wiphy, initiator);
332		break;
333	case 0x68:
334		ath_reg_apply_beaconing_flags(wiphy, initiator);
335		ath_reg_apply_active_scan_flags(wiphy, initiator);
336		break;
337	}
338}
339
340static u16 ath_regd_find_country_by_name(char *alpha2)
341{
342	unsigned int i;
343
344	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
345		if (!memcmp(allCountries[i].isoName, alpha2, 2))
346			return allCountries[i].countryCode;
347	}
348
349	return -1;
350}
351
352static int __ath_reg_dyn_country(struct wiphy *wiphy,
353				 struct ath_regulatory *reg,
354				 struct regulatory_request *request)
355{
356	u16 country_code;
357
358	if (!ath_is_world_regd(reg))
359		return -EINVAL;
360
361	country_code = ath_regd_find_country_by_name(request->alpha2);
362	if (country_code == (u16) -1)
363		return -EINVAL;
364
365	reg->current_rd = COUNTRY_ERD_FLAG;
366	reg->current_rd |= country_code;
367
368	__ath_regd_init(reg);
369
370	ath_reg_apply_world_flags(wiphy, request->initiator, reg);
371
372	return 0;
373}
374
375static void ath_reg_dyn_country(struct wiphy *wiphy,
376				struct ath_regulatory *reg,
377				struct regulatory_request *request)
378{
379	if (__ath_reg_dyn_country(wiphy, reg, request))
380		return;
381
382	printk(KERN_DEBUG "ath: regdomain 0x%0x "
383			  "dynamically updated by %s\n",
384	       reg->current_rd,
385	       reg_initiator_name(request->initiator));
386}
387
388static bool dynamic_country_user_possible(struct ath_regulatory *reg)
389{
390	if (config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_CERT_TESTING))
391		return true;
392
393	switch (reg->country_code) {
394	case CTRY_UNITED_STATES:
395	case CTRY_JAPAN1:
396	case CTRY_JAPAN2:
397	case CTRY_JAPAN3:
398	case CTRY_JAPAN4:
399	case CTRY_JAPAN5:
400	case CTRY_JAPAN6:
401	case CTRY_JAPAN7:
402	case CTRY_JAPAN8:
403	case CTRY_JAPAN9:
404	case CTRY_JAPAN10:
405	case CTRY_JAPAN11:
406	case CTRY_JAPAN12:
407	case CTRY_JAPAN13:
408	case CTRY_JAPAN14:
409	case CTRY_JAPAN15:
410	case CTRY_JAPAN16:
411	case CTRY_JAPAN17:
412	case CTRY_JAPAN18:
413	case CTRY_JAPAN19:
414	case CTRY_JAPAN20:
415	case CTRY_JAPAN21:
416	case CTRY_JAPAN22:
417	case CTRY_JAPAN23:
418	case CTRY_JAPAN24:
419	case CTRY_JAPAN25:
420	case CTRY_JAPAN26:
421	case CTRY_JAPAN27:
422	case CTRY_JAPAN28:
423	case CTRY_JAPAN29:
424	case CTRY_JAPAN30:
425	case CTRY_JAPAN31:
426	case CTRY_JAPAN32:
427	case CTRY_JAPAN33:
428	case CTRY_JAPAN34:
429	case CTRY_JAPAN35:
430	case CTRY_JAPAN36:
431	case CTRY_JAPAN37:
432	case CTRY_JAPAN38:
433	case CTRY_JAPAN39:
434	case CTRY_JAPAN40:
435	case CTRY_JAPAN41:
436	case CTRY_JAPAN42:
437	case CTRY_JAPAN43:
438	case CTRY_JAPAN44:
439	case CTRY_JAPAN45:
440	case CTRY_JAPAN46:
441	case CTRY_JAPAN47:
442	case CTRY_JAPAN48:
443	case CTRY_JAPAN49:
444	case CTRY_JAPAN50:
445	case CTRY_JAPAN51:
446	case CTRY_JAPAN52:
447	case CTRY_JAPAN53:
448	case CTRY_JAPAN54:
449	case CTRY_JAPAN55:
450	case CTRY_JAPAN56:
451	case CTRY_JAPAN57:
452	case CTRY_JAPAN58:
453	case CTRY_JAPAN59:
454		return false;
455	}
456
457	return true;
458}
459
460static void ath_reg_dyn_country_user(struct wiphy *wiphy,
461				     struct ath_regulatory *reg,
462				     struct regulatory_request *request)
463{
464	if (!config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS))
465		return;
466	if (!dynamic_country_user_possible(reg))
467		return;
468	ath_reg_dyn_country(wiphy, reg, request);
469}
470
471void ath_reg_notifier_apply(struct wiphy *wiphy,
472			    struct regulatory_request *request,
473			    struct ath_regulatory *reg)
474{
475	struct ath_common *common = container_of(reg, struct ath_common,
476						 regulatory);
477	/* We always apply this */
478	ath_reg_apply_radar_flags(wiphy);
479
480	/*
481	 * This would happen when we have sent a custom regulatory request
482	 * a world regulatory domain and the scheduler hasn't yet processed
483	 * any pending requests in the queue.
484	 */
485	if (!request)
486		return;
487
488	switch (request->initiator) {
489	case NL80211_REGDOM_SET_BY_CORE:
490		/*
491		 * If common->reg_world_copy is world roaming it means we *were*
492		 * world roaming... so we now have to restore that data.
493		 */
494		if (!ath_is_world_regd(&common->reg_world_copy))
495			break;
496
497		memcpy(reg, &common->reg_world_copy,
498		       sizeof(struct ath_regulatory));
499		break;
500	case NL80211_REGDOM_SET_BY_DRIVER:
501		break;
502	case NL80211_REGDOM_SET_BY_USER:
503		ath_reg_dyn_country_user(wiphy, reg, request);
504		break;
505	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
506		ath_reg_dyn_country(wiphy, reg, request);
507		break;
508	}
509}
510EXPORT_SYMBOL(ath_reg_notifier_apply);
511
512static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
513{
514	u16 rd = ath_regd_get_eepromRD(reg);
515	int i;
516
517	if (rd & COUNTRY_ERD_FLAG) {
518		/* EEPROM value is a country code */
519		u16 cc = rd & ~COUNTRY_ERD_FLAG;
520		printk(KERN_DEBUG
521		       "ath: EEPROM indicates we should expect "
522			"a country code\n");
523		for (i = 0; i < ARRAY_SIZE(allCountries); i++)
524			if (allCountries[i].countryCode == cc)
525				return true;
526	} else {
527		/* EEPROM value is a regpair value */
528		if (rd != CTRY_DEFAULT)
529			printk(KERN_DEBUG "ath: EEPROM indicates we "
530			       "should expect a direct regpair map\n");
531		for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
532			if (regDomainPairs[i].regDmnEnum == rd)
533				return true;
534	}
535	printk(KERN_DEBUG
536		 "ath: invalid regulatory domain/country code 0x%x\n", rd);
537	return false;
538}
539
540/* EEPROM country code to regpair mapping */
541static struct country_code_to_enum_rd*
542ath_regd_find_country(u16 countryCode)
543{
544	int i;
545
546	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
547		if (allCountries[i].countryCode == countryCode)
548			return &allCountries[i];
549	}
550	return NULL;
551}
552
553/* EEPROM rd code to regpair mapping */
554static struct country_code_to_enum_rd*
555ath_regd_find_country_by_rd(int regdmn)
556{
557	int i;
558
559	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
560		if (allCountries[i].regDmnEnum == regdmn)
561			return &allCountries[i];
562	}
563	return NULL;
564}
565
566/* Returns the map of the EEPROM set RD to a country code */
567static u16 ath_regd_get_default_country(u16 rd)
568{
569	if (rd & COUNTRY_ERD_FLAG) {
570		struct country_code_to_enum_rd *country = NULL;
571		u16 cc = rd & ~COUNTRY_ERD_FLAG;
572
573		country = ath_regd_find_country(cc);
574		if (country != NULL)
575			return cc;
576	}
577
578	return CTRY_DEFAULT;
579}
580
581static struct reg_dmn_pair_mapping*
582ath_get_regpair(int regdmn)
583{
584	int i;
585
586	if (regdmn == NO_ENUMRD)
587		return NULL;
588	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
589		if (regDomainPairs[i].regDmnEnum == regdmn)
590			return &regDomainPairs[i];
591	}
592	return NULL;
593}
594
595static int
596ath_regd_init_wiphy(struct ath_regulatory *reg,
597		    struct wiphy *wiphy,
598		    void (*reg_notifier)(struct wiphy *wiphy,
599					 struct regulatory_request *request))
600{
601	const struct ieee80211_regdomain *regd;
602
603	wiphy->reg_notifier = reg_notifier;
604	wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
605
606	if (ath_is_world_regd(reg)) {
607		/*
608		 * Anything applied here (prior to wiphy registration) gets
609		 * saved on the wiphy orig_* parameters
610		 */
611		regd = ath_world_regdomain(reg);
612		wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
613	} else {
614		/*
615		 * This gets applied in the case of the absence of CRDA,
616		 * it's our own custom world regulatory domain, similar to
617		 * cfg80211's but we enable passive scanning.
618		 */
619		regd = ath_default_world_regdomain();
620	}
621	wiphy_apply_custom_regulatory(wiphy, regd);
622	ath_reg_apply_radar_flags(wiphy);
623	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
624	return 0;
625}
626
627/*
628 * Some users have reported their EEPROM programmed with
629 * 0x8000 set, this is not a supported regulatory domain
630 * but since we have more than one user with it we need
631 * a solution for them. We default to 0x64, which is the
632 * default Atheros world regulatory domain.
633 */
634static void ath_regd_sanitize(struct ath_regulatory *reg)
635{
636	if (reg->current_rd != COUNTRY_ERD_FLAG)
637		return;
638	printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
639	reg->current_rd = 0x64;
640}
641
642static int __ath_regd_init(struct ath_regulatory *reg)
643{
644	struct country_code_to_enum_rd *country = NULL;
645	u16 regdmn;
646
647	if (!reg)
648		return -EINVAL;
649
650	ath_regd_sanitize(reg);
651
652	printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
653
654	if (!ath_regd_is_eeprom_valid(reg)) {
655		pr_err("Invalid EEPROM contents\n");
656		return -EINVAL;
657	}
658
659	regdmn = ath_regd_get_eepromRD(reg);
660	reg->country_code = ath_regd_get_default_country(regdmn);
661
662	if (reg->country_code == CTRY_DEFAULT &&
663	    regdmn == CTRY_DEFAULT) {
664		printk(KERN_DEBUG "ath: EEPROM indicates default "
665		       "country code should be used\n");
666		reg->country_code = CTRY_UNITED_STATES;
667	}
668
669	if (reg->country_code == CTRY_DEFAULT) {
670		country = NULL;
671	} else {
672		printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
673		       "map search\n");
674		country = ath_regd_find_country(reg->country_code);
675		if (country == NULL) {
676			printk(KERN_DEBUG
677				"ath: no valid country maps found for "
678				"country code: 0x%0x\n",
679				reg->country_code);
680			return -EINVAL;
681		} else {
682			regdmn = country->regDmnEnum;
683			printk(KERN_DEBUG "ath: country maps to "
684			       "regdmn code: 0x%0x\n",
685			       regdmn);
686		}
687	}
688
689	reg->regpair = ath_get_regpair(regdmn);
690
691	if (!reg->regpair) {
692		printk(KERN_DEBUG "ath: "
693			"No regulatory domain pair found, cannot continue\n");
694		return -EINVAL;
695	}
696
697	if (!country)
698		country = ath_regd_find_country_by_rd(regdmn);
699
700	if (country) {
701		reg->alpha2[0] = country->isoName[0];
702		reg->alpha2[1] = country->isoName[1];
703	} else {
704		reg->alpha2[0] = '0';
705		reg->alpha2[1] = '0';
706	}
707
708	printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
709		reg->alpha2[0], reg->alpha2[1]);
710	printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
711		reg->regpair->regDmnEnum);
712
713	return 0;
714}
715
716int
717ath_regd_init(struct ath_regulatory *reg,
718	      struct wiphy *wiphy,
719	      void (*reg_notifier)(struct wiphy *wiphy,
720				   struct regulatory_request *request))
721{
722	struct ath_common *common = container_of(reg, struct ath_common,
723						 regulatory);
724	int r;
725
726	r = __ath_regd_init(reg);
727	if (r)
728		return r;
729
730	if (ath_is_world_regd(reg))
731		memcpy(&common->reg_world_copy, reg,
732		       sizeof(struct ath_regulatory));
733
734	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
735
736	return 0;
737}
738EXPORT_SYMBOL(ath_regd_init);
739
740u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
741			  enum ieee80211_band band)
742{
743	if (!reg->regpair ||
744	    (reg->country_code == CTRY_DEFAULT &&
745	     is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
746		return SD_NO_CTL;
747	}
748
749	switch (band) {
750	case IEEE80211_BAND_2GHZ:
751		return reg->regpair->reg_2ghz_ctl;
752	case IEEE80211_BAND_5GHZ:
753		return reg->regpair->reg_5ghz_ctl;
754	default:
755		return NO_CTL;
756	}
757}
758EXPORT_SYMBOL(ath_regd_get_band_ctl);
759