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 bool ath_reg_dyn_country_user_allow(struct ath_regulatory *reg)
190{
191	if (!config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS))
192		return false;
193	if (!dynamic_country_user_possible(reg))
194		return false;
195	return true;
196}
197
198static inline bool is_wwr_sku(u16 regd)
199{
200	return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
201		(((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
202		(regd == WORLD));
203}
204
205static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
206{
207	return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
208}
209
210bool ath_is_world_regd(struct ath_regulatory *reg)
211{
212	return is_wwr_sku(ath_regd_get_eepromRD(reg));
213}
214EXPORT_SYMBOL(ath_is_world_regd);
215
216static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
217{
218	/* this is the most restrictive */
219	return &ath_world_regdom_64;
220}
221
222static const struct
223ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
224{
225	switch (reg->regpair->reg_domain) {
226	case 0x60:
227	case 0x61:
228	case 0x62:
229		return &ath_world_regdom_60_61_62;
230	case 0x63:
231	case 0x65:
232		return &ath_world_regdom_63_65;
233	case 0x64:
234		return &ath_world_regdom_64;
235	case 0x66:
236	case 0x69:
237		return &ath_world_regdom_66_69;
238	case 0x67:
239	case 0x68:
240	case 0x6A:
241	case 0x6C:
242		return &ath_world_regdom_67_68_6A_6C;
243	default:
244		WARN_ON(1);
245		return ath_default_world_regdomain();
246	}
247}
248
249bool ath_is_49ghz_allowed(u16 regdomain)
250{
251	/* possibly more */
252	return regdomain == MKK9_MKKC;
253}
254EXPORT_SYMBOL(ath_is_49ghz_allowed);
255
256/* Frequency is one where radar detection is required */
257static bool ath_is_radar_freq(u16 center_freq)
258{
259	return (center_freq >= 5260 && center_freq <= 5700);
260}
261
262static void ath_force_clear_no_ir_chan(struct wiphy *wiphy,
263				       struct ieee80211_channel *ch)
264{
265	const struct ieee80211_reg_rule *reg_rule;
266
267	reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
268	if (IS_ERR(reg_rule))
269		return;
270
271	if (!(reg_rule->flags & NL80211_RRF_NO_IR))
272		if (ch->flags & IEEE80211_CHAN_NO_IR)
273			ch->flags &= ~IEEE80211_CHAN_NO_IR;
274}
275
276static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
277{
278	struct ieee80211_channel *ch;
279
280	ch = ieee80211_get_channel(wiphy, center_freq);
281	if (!ch)
282		return;
283
284	ath_force_clear_no_ir_chan(wiphy, ch);
285}
286
287static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
288{
289	ch->flags |= IEEE80211_CHAN_NO_IR;
290}
291
292static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
293{
294	struct ieee80211_channel *ch;
295
296	ch = ieee80211_get_channel(wiphy, center_freq);
297	if (!ch)
298		return;
299
300	ath_force_no_ir_chan(ch);
301}
302
303static void
304__ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
305				struct ath_regulatory *reg,
306				enum nl80211_reg_initiator initiator,
307				struct ieee80211_channel *ch)
308{
309	if (ath_is_radar_freq(ch->center_freq) ||
310	    (ch->flags & IEEE80211_CHAN_RADAR))
311		return;
312
313	switch (initiator) {
314	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
315		ath_force_clear_no_ir_chan(wiphy, ch);
316		break;
317	case NL80211_REGDOM_SET_BY_USER:
318		if (ath_reg_dyn_country_user_allow(reg))
319			ath_force_clear_no_ir_chan(wiphy, ch);
320		break;
321	default:
322		if (ch->beacon_found)
323			ch->flags &= ~IEEE80211_CHAN_NO_IR;
324	}
325}
326
327/*
328 * These exception rules do not apply radar frequencies.
329 *
330 * - We enable initiating radiation if the country IE says its fine:
331 * - If no country IE has been processed and a we determine we have
332 *   received a beacon on a channel we can enable initiating radiation.
333 */
334static void
335ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
336			      struct ath_regulatory *reg,
337			      enum nl80211_reg_initiator initiator)
338{
339	enum ieee80211_band band;
340	struct ieee80211_supported_band *sband;
341	struct ieee80211_channel *ch;
342	unsigned int i;
343
344	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
345		if (!wiphy->bands[band])
346			continue;
347		sband = wiphy->bands[band];
348		for (i = 0; i < sband->n_channels; i++) {
349			ch = &sband->channels[i];
350			__ath_reg_apply_beaconing_flags(wiphy, reg,
351							initiator, ch);
352		}
353	}
354}
355
356/**
357 * ath_reg_apply_ir_flags()
358 * @wiphy: the wiphy to use
359 * @initiator: the regulatory hint initiator
360 *
361 * If no country IE has been received always enable passive scan
362 * and no-ibss on these channels. This is only done for specific
363 * regulatory SKUs.
364 *
365 * If a country IE has been received check its rule for this
366 * channel first before enabling active scan. The passive scan
367 * would have been enforced by the initial processing of our
368 * custom regulatory domain.
369 */
370static void
371ath_reg_apply_ir_flags(struct wiphy *wiphy,
372		       struct ath_regulatory *reg,
373		       enum nl80211_reg_initiator initiator)
374{
375	struct ieee80211_supported_band *sband;
376
377	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
378	if (!sband)
379		return;
380
381	switch(initiator) {
382	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
383		ath_force_clear_no_ir_freq(wiphy, 2467);
384		ath_force_clear_no_ir_freq(wiphy, 2472);
385		break;
386	case NL80211_REGDOM_SET_BY_USER:
387		if (!ath_reg_dyn_country_user_allow(reg))
388			break;
389		ath_force_clear_no_ir_freq(wiphy, 2467);
390		ath_force_clear_no_ir_freq(wiphy, 2472);
391		break;
392	default:
393		ath_force_no_ir_freq(wiphy, 2467);
394		ath_force_no_ir_freq(wiphy, 2472);
395	}
396}
397
398/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
399static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
400{
401	struct ieee80211_supported_band *sband;
402	struct ieee80211_channel *ch;
403	unsigned int i;
404
405	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
406		return;
407
408	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
409
410	for (i = 0; i < sband->n_channels; i++) {
411		ch = &sband->channels[i];
412		if (!ath_is_radar_freq(ch->center_freq))
413			continue;
414		/* We always enable radar detection/DFS on this
415		 * frequency range. Additionally we also apply on
416		 * this frequency range:
417		 * - If STA mode does not yet have DFS supports disable
418		 *   active scanning
419		 * - If adhoc mode does not support DFS yet then
420		 *   disable adhoc in the frequency.
421		 * - If AP mode does not yet support radar detection/DFS
422		 *   do not allow AP mode
423		 */
424		if (!(ch->flags & IEEE80211_CHAN_DISABLED))
425			ch->flags |= IEEE80211_CHAN_RADAR |
426				     IEEE80211_CHAN_NO_IR;
427	}
428}
429
430static void ath_reg_apply_world_flags(struct wiphy *wiphy,
431				      enum nl80211_reg_initiator initiator,
432				      struct ath_regulatory *reg)
433{
434	switch (reg->regpair->reg_domain) {
435	case 0x60:
436	case 0x63:
437	case 0x66:
438	case 0x67:
439	case 0x6C:
440		ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
441		break;
442	case 0x68:
443		ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
444		ath_reg_apply_ir_flags(wiphy, reg, initiator);
445		break;
446	default:
447		if (ath_reg_dyn_country_user_allow(reg))
448			ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
449	}
450}
451
452static u16 ath_regd_find_country_by_name(char *alpha2)
453{
454	unsigned int i;
455
456	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
457		if (!memcmp(allCountries[i].isoName, alpha2, 2))
458			return allCountries[i].countryCode;
459	}
460
461	return -1;
462}
463
464static int __ath_reg_dyn_country(struct wiphy *wiphy,
465				 struct ath_regulatory *reg,
466				 struct regulatory_request *request)
467{
468	u16 country_code;
469
470	if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
471	    !ath_is_world_regd(reg))
472		return -EINVAL;
473
474	country_code = ath_regd_find_country_by_name(request->alpha2);
475	if (country_code == (u16) -1)
476		return -EINVAL;
477
478	reg->current_rd = COUNTRY_ERD_FLAG;
479	reg->current_rd |= country_code;
480
481	__ath_regd_init(reg);
482
483	ath_reg_apply_world_flags(wiphy, request->initiator, reg);
484
485	return 0;
486}
487
488static void ath_reg_dyn_country(struct wiphy *wiphy,
489				struct ath_regulatory *reg,
490				struct regulatory_request *request)
491{
492	if (__ath_reg_dyn_country(wiphy, reg, request))
493		return;
494
495	printk(KERN_DEBUG "ath: regdomain 0x%0x "
496			  "dynamically updated by %s\n",
497	       reg->current_rd,
498	       reg_initiator_name(request->initiator));
499}
500
501void ath_reg_notifier_apply(struct wiphy *wiphy,
502			    struct regulatory_request *request,
503			    struct ath_regulatory *reg)
504{
505	struct ath_common *common = container_of(reg, struct ath_common,
506						 regulatory);
507	/* We always apply this */
508	ath_reg_apply_radar_flags(wiphy);
509
510	/*
511	 * This would happen when we have sent a custom regulatory request
512	 * a world regulatory domain and the scheduler hasn't yet processed
513	 * any pending requests in the queue.
514	 */
515	if (!request)
516		return;
517
518	reg->region = request->dfs_region;
519	switch (request->initiator) {
520	case NL80211_REGDOM_SET_BY_CORE:
521		/*
522		 * If common->reg_world_copy is world roaming it means we *were*
523		 * world roaming... so we now have to restore that data.
524		 */
525		if (!ath_is_world_regd(&common->reg_world_copy))
526			break;
527
528		memcpy(reg, &common->reg_world_copy,
529		       sizeof(struct ath_regulatory));
530		break;
531	case NL80211_REGDOM_SET_BY_DRIVER:
532		break;
533	case NL80211_REGDOM_SET_BY_USER:
534		if (ath_reg_dyn_country_user_allow(reg))
535			ath_reg_dyn_country(wiphy, reg, request);
536		break;
537	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
538		ath_reg_dyn_country(wiphy, reg, request);
539		break;
540	}
541}
542EXPORT_SYMBOL(ath_reg_notifier_apply);
543
544static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
545{
546	u16 rd = ath_regd_get_eepromRD(reg);
547	int i;
548
549	if (rd & COUNTRY_ERD_FLAG) {
550		/* EEPROM value is a country code */
551		u16 cc = rd & ~COUNTRY_ERD_FLAG;
552		printk(KERN_DEBUG
553		       "ath: EEPROM indicates we should expect "
554			"a country code\n");
555		for (i = 0; i < ARRAY_SIZE(allCountries); i++)
556			if (allCountries[i].countryCode == cc)
557				return true;
558	} else {
559		/* EEPROM value is a regpair value */
560		if (rd != CTRY_DEFAULT)
561			printk(KERN_DEBUG "ath: EEPROM indicates we "
562			       "should expect a direct regpair map\n");
563		for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
564			if (regDomainPairs[i].reg_domain == rd)
565				return true;
566	}
567	printk(KERN_DEBUG
568		 "ath: invalid regulatory domain/country code 0x%x\n", rd);
569	return false;
570}
571
572/* EEPROM country code to regpair mapping */
573static struct country_code_to_enum_rd*
574ath_regd_find_country(u16 countryCode)
575{
576	int i;
577
578	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
579		if (allCountries[i].countryCode == countryCode)
580			return &allCountries[i];
581	}
582	return NULL;
583}
584
585/* EEPROM rd code to regpair mapping */
586static struct country_code_to_enum_rd*
587ath_regd_find_country_by_rd(int regdmn)
588{
589	int i;
590
591	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
592		if (allCountries[i].regDmnEnum == regdmn)
593			return &allCountries[i];
594	}
595	return NULL;
596}
597
598/* Returns the map of the EEPROM set RD to a country code */
599static u16 ath_regd_get_default_country(u16 rd)
600{
601	if (rd & COUNTRY_ERD_FLAG) {
602		struct country_code_to_enum_rd *country = NULL;
603		u16 cc = rd & ~COUNTRY_ERD_FLAG;
604
605		country = ath_regd_find_country(cc);
606		if (country != NULL)
607			return cc;
608	}
609
610	return CTRY_DEFAULT;
611}
612
613static struct reg_dmn_pair_mapping*
614ath_get_regpair(int regdmn)
615{
616	int i;
617
618	if (regdmn == NO_ENUMRD)
619		return NULL;
620	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
621		if (regDomainPairs[i].reg_domain == regdmn)
622			return &regDomainPairs[i];
623	}
624	return NULL;
625}
626
627static int
628ath_regd_init_wiphy(struct ath_regulatory *reg,
629		    struct wiphy *wiphy,
630		    void (*reg_notifier)(struct wiphy *wiphy,
631					 struct regulatory_request *request))
632{
633	const struct ieee80211_regdomain *regd;
634
635	wiphy->reg_notifier = reg_notifier;
636	wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
637				   REGULATORY_CUSTOM_REG;
638
639	if (ath_is_world_regd(reg)) {
640		/*
641		 * Anything applied here (prior to wiphy registration) gets
642		 * saved on the wiphy orig_* parameters
643		 */
644		regd = ath_world_regdomain(reg);
645		wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER;
646	} else {
647		/*
648		 * This gets applied in the case of the absence of CRDA,
649		 * it's our own custom world regulatory domain, similar to
650		 * cfg80211's but we enable passive scanning.
651		 */
652		regd = ath_default_world_regdomain();
653	}
654
655	wiphy_apply_custom_regulatory(wiphy, regd);
656	ath_reg_apply_radar_flags(wiphy);
657	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
658	return 0;
659}
660
661/*
662 * Some users have reported their EEPROM programmed with
663 * 0x8000 set, this is not a supported regulatory domain
664 * but since we have more than one user with it we need
665 * a solution for them. We default to 0x64, which is the
666 * default Atheros world regulatory domain.
667 */
668static void ath_regd_sanitize(struct ath_regulatory *reg)
669{
670	if (reg->current_rd != COUNTRY_ERD_FLAG)
671		return;
672	printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
673	reg->current_rd = 0x64;
674}
675
676static int __ath_regd_init(struct ath_regulatory *reg)
677{
678	struct country_code_to_enum_rd *country = NULL;
679	u16 regdmn;
680
681	if (!reg)
682		return -EINVAL;
683
684	ath_regd_sanitize(reg);
685
686	printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
687
688	if (!ath_regd_is_eeprom_valid(reg)) {
689		pr_err("Invalid EEPROM contents\n");
690		return -EINVAL;
691	}
692
693	regdmn = ath_regd_get_eepromRD(reg);
694	reg->country_code = ath_regd_get_default_country(regdmn);
695
696	if (reg->country_code == CTRY_DEFAULT &&
697	    regdmn == CTRY_DEFAULT) {
698		printk(KERN_DEBUG "ath: EEPROM indicates default "
699		       "country code should be used\n");
700		reg->country_code = CTRY_UNITED_STATES;
701	}
702
703	if (reg->country_code == CTRY_DEFAULT) {
704		country = NULL;
705	} else {
706		printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
707		       "map search\n");
708		country = ath_regd_find_country(reg->country_code);
709		if (country == NULL) {
710			printk(KERN_DEBUG
711				"ath: no valid country maps found for "
712				"country code: 0x%0x\n",
713				reg->country_code);
714			return -EINVAL;
715		} else {
716			regdmn = country->regDmnEnum;
717			printk(KERN_DEBUG "ath: country maps to "
718			       "regdmn code: 0x%0x\n",
719			       regdmn);
720		}
721	}
722
723	reg->regpair = ath_get_regpair(regdmn);
724
725	if (!reg->regpair) {
726		printk(KERN_DEBUG "ath: "
727			"No regulatory domain pair found, cannot continue\n");
728		return -EINVAL;
729	}
730
731	if (!country)
732		country = ath_regd_find_country_by_rd(regdmn);
733
734	if (country) {
735		reg->alpha2[0] = country->isoName[0];
736		reg->alpha2[1] = country->isoName[1];
737	} else {
738		reg->alpha2[0] = '0';
739		reg->alpha2[1] = '0';
740	}
741
742	printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
743		reg->alpha2[0], reg->alpha2[1]);
744	printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
745		reg->regpair->reg_domain);
746
747	return 0;
748}
749
750int
751ath_regd_init(struct ath_regulatory *reg,
752	      struct wiphy *wiphy,
753	      void (*reg_notifier)(struct wiphy *wiphy,
754				   struct regulatory_request *request))
755{
756	struct ath_common *common = container_of(reg, struct ath_common,
757						 regulatory);
758	int r;
759
760	r = __ath_regd_init(reg);
761	if (r)
762		return r;
763
764	if (ath_is_world_regd(reg))
765		memcpy(&common->reg_world_copy, reg,
766		       sizeof(struct ath_regulatory));
767
768	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
769
770	return 0;
771}
772EXPORT_SYMBOL(ath_regd_init);
773
774u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
775			  enum ieee80211_band band)
776{
777	if (!reg->regpair ||
778	    (reg->country_code == CTRY_DEFAULT &&
779	     is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
780		return SD_NO_CTL;
781	}
782
783	if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) {
784		switch (reg->region) {
785		case NL80211_DFS_FCC:
786			return CTL_FCC;
787		case NL80211_DFS_ETSI:
788			return CTL_ETSI;
789		case NL80211_DFS_JP:
790			return CTL_MKK;
791		default:
792			break;
793		}
794	}
795
796	switch (band) {
797	case IEEE80211_BAND_2GHZ:
798		return reg->regpair->reg_2ghz_ctl;
799	case IEEE80211_BAND_5GHZ:
800		return reg->regpair->reg_5ghz_ctl;
801	default:
802		return NO_CTL;
803	}
804}
805EXPORT_SYMBOL(ath_regd_get_band_ctl);
806