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 ATH_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 ATH_2GHZ_CH12_13	REG_RULE(2467-10, 2472+10, 40, 0, 20,\
40					 NL80211_RRF_NO_IR)
41#define ATH_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 ATH_5GHZ_5150_5350	REG_RULE(5150-10, 5350+10, 80, 0, 30,\
47					 NL80211_RRF_NO_IR)
48#define ATH_5GHZ_5470_5850	REG_RULE(5470-10, 5850+10, 80, 0, 30,\
49					 NL80211_RRF_NO_IR)
50#define ATH_5GHZ_5725_5850	REG_RULE(5725-10, 5850+10, 80, 0, 30,\
51					 NL80211_RRF_NO_IR)
52
53#define ATH_2GHZ_ALL		ATH_2GHZ_CH01_11, \
54				ATH_2GHZ_CH12_13, \
55				ATH_2GHZ_CH14
56
57#define ATH_5GHZ_ALL		ATH_5GHZ_5150_5350, \
58				ATH_5GHZ_5470_5850
59
60/* This one skips what we call "mid band" */
61#define ATH_5GHZ_NO_MIDBAND	ATH_5GHZ_5150_5350, \
62				ATH_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		ATH_2GHZ_ALL,
71		ATH_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		ATH_2GHZ_CH01_11,
81		ATH_2GHZ_CH12_13,
82		ATH_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		ATH_2GHZ_CH01_11,
92		ATH_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		ATH_2GHZ_CH01_11,
102		ATH_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		ATH_2GHZ_CH01_11,
112		ATH_2GHZ_CH12_13,
113		ATH_5GHZ_ALL,
114	}
115};
116
117static bool dynamic_country_user_possible(struct ath_regulatory *reg)
118{
119	if (IS_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 (!IS_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			      struct ath_regulatory *reg)
259
260{
261	if (reg->country_code == CTRY_INDIA)
262		return (center_freq >= 5500 && center_freq <= 5700);
263	return (center_freq >= 5260 && center_freq <= 5700);
264}
265
266static void ath_force_clear_no_ir_chan(struct wiphy *wiphy,
267				       struct ieee80211_channel *ch)
268{
269	const struct ieee80211_reg_rule *reg_rule;
270
271	reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
272	if (IS_ERR(reg_rule))
273		return;
274
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
280static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
281{
282	struct ieee80211_channel *ch;
283
284	ch = ieee80211_get_channel(wiphy, center_freq);
285	if (!ch)
286		return;
287
288	ath_force_clear_no_ir_chan(wiphy, ch);
289}
290
291static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
292{
293	ch->flags |= IEEE80211_CHAN_NO_IR;
294}
295
296static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
297{
298	struct ieee80211_channel *ch;
299
300	ch = ieee80211_get_channel(wiphy, center_freq);
301	if (!ch)
302		return;
303
304	ath_force_no_ir_chan(ch);
305}
306
307static void
308__ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
309				struct ath_regulatory *reg,
310				enum nl80211_reg_initiator initiator,
311				struct ieee80211_channel *ch)
312{
313	if (ath_is_radar_freq(ch->center_freq, reg) ||
314	    (ch->flags & IEEE80211_CHAN_RADAR))
315		return;
316
317	switch (initiator) {
318	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
319		ath_force_clear_no_ir_chan(wiphy, ch);
320		break;
321	case NL80211_REGDOM_SET_BY_USER:
322		if (ath_reg_dyn_country_user_allow(reg))
323			ath_force_clear_no_ir_chan(wiphy, ch);
324		break;
325	default:
326		if (ch->beacon_found)
327			ch->flags &= ~IEEE80211_CHAN_NO_IR;
328	}
329}
330
331/*
332 * These exception rules do not apply radar frequencies.
333 *
334 * - We enable initiating radiation if the country IE says its fine:
335 * - If no country IE has been processed and a we determine we have
336 *   received a beacon on a channel we can enable initiating radiation.
337 */
338static void
339ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
340			      struct ath_regulatory *reg,
341			      enum nl80211_reg_initiator initiator)
342{
343	enum nl80211_band band;
344	struct ieee80211_supported_band *sband;
345	struct ieee80211_channel *ch;
346	unsigned int i;
347
348	for (band = 0; band < NUM_NL80211_BANDS; band++) {
349		if (!wiphy->bands[band])
350			continue;
351		sband = wiphy->bands[band];
352		for (i = 0; i < sband->n_channels; i++) {
353			ch = &sband->channels[i];
354			__ath_reg_apply_beaconing_flags(wiphy, reg,
355							initiator, ch);
356		}
357	}
358}
359
360/**
361 * ath_reg_apply_ir_flags()
362 * @wiphy: the wiphy to use
363 * @reg: regulatory structure - used for country selection
364 * @initiator: the regulatory hint initiator
365 *
366 * If no country IE has been received always enable passive scan
367 * and no-ibss on these channels. This is only done for specific
368 * regulatory SKUs.
369 *
370 * If a country IE has been received check its rule for this
371 * channel first before enabling active scan. The passive scan
372 * would have been enforced by the initial processing of our
373 * custom regulatory domain.
374 */
375static void
376ath_reg_apply_ir_flags(struct wiphy *wiphy,
377		       struct ath_regulatory *reg,
378		       enum nl80211_reg_initiator initiator)
379{
380	struct ieee80211_supported_band *sband;
381
382	sband = wiphy->bands[NL80211_BAND_2GHZ];
383	if (!sband)
384		return;
385
386	switch(initiator) {
387	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
388		ath_force_clear_no_ir_freq(wiphy, 2467);
389		ath_force_clear_no_ir_freq(wiphy, 2472);
390		break;
391	case NL80211_REGDOM_SET_BY_USER:
392		if (!ath_reg_dyn_country_user_allow(reg))
393			break;
394		ath_force_clear_no_ir_freq(wiphy, 2467);
395		ath_force_clear_no_ir_freq(wiphy, 2472);
396		break;
397	default:
398		ath_force_no_ir_freq(wiphy, 2467);
399		ath_force_no_ir_freq(wiphy, 2472);
400	}
401}
402
403/* Always apply Radar/DFS rules on freq range 5500 MHz - 5700 MHz */
404static void ath_reg_apply_radar_flags(struct wiphy *wiphy,
405				      struct ath_regulatory *reg)
406{
407	struct ieee80211_supported_band *sband;
408	struct ieee80211_channel *ch;
409	unsigned int i;
410
411	if (!wiphy->bands[NL80211_BAND_5GHZ])
412		return;
413
414	sband = wiphy->bands[NL80211_BAND_5GHZ];
415
416	for (i = 0; i < sband->n_channels; i++) {
417		ch = &sband->channels[i];
418		if (!ath_is_radar_freq(ch->center_freq, reg))
419			continue;
420		/* We always enable radar detection/DFS on this
421		 * frequency range. Additionally we also apply on
422		 * this frequency range:
423		 * - If STA mode does not yet have DFS supports disable
424		 *   active scanning
425		 * - If adhoc mode does not support DFS yet then
426		 *   disable adhoc in the frequency.
427		 * - If AP mode does not yet support radar detection/DFS
428		 *   do not allow AP mode
429		 */
430		if (!(ch->flags & IEEE80211_CHAN_DISABLED))
431			ch->flags |= IEEE80211_CHAN_RADAR |
432				     IEEE80211_CHAN_NO_IR;
433	}
434}
435
436static void ath_reg_apply_world_flags(struct wiphy *wiphy,
437				      enum nl80211_reg_initiator initiator,
438				      struct ath_regulatory *reg)
439{
440	switch (reg->regpair->reg_domain) {
441	case 0x60:
442	case 0x63:
443	case 0x66:
444	case 0x67:
445	case 0x6C:
446		ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
447		break;
448	case 0x68:
449		ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
450		ath_reg_apply_ir_flags(wiphy, reg, initiator);
451		break;
452	default:
453		if (ath_reg_dyn_country_user_allow(reg))
454			ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
455	}
456}
457
458u16 ath_regd_find_country_by_name(char *alpha2)
459{
460	unsigned int i;
461
462	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
463		if (!memcmp(allCountries[i].isoName, alpha2, 2))
464			return allCountries[i].countryCode;
465	}
466
467	return -1;
468}
469EXPORT_SYMBOL(ath_regd_find_country_by_name);
470
471static int __ath_reg_dyn_country(struct wiphy *wiphy,
472				 struct ath_regulatory *reg,
473				 struct regulatory_request *request)
474{
475	u16 country_code;
476
477	if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
478	    !ath_is_world_regd(reg))
479		return -EINVAL;
480
481	country_code = ath_regd_find_country_by_name(request->alpha2);
482	if (country_code == (u16) -1)
483		return -EINVAL;
484
485	reg->current_rd = COUNTRY_ERD_FLAG;
486	reg->current_rd |= country_code;
487
488	__ath_regd_init(reg);
489
490	ath_reg_apply_world_flags(wiphy, request->initiator, reg);
491
492	return 0;
493}
494
495static void ath_reg_dyn_country(struct wiphy *wiphy,
496				struct ath_regulatory *reg,
497				struct regulatory_request *request)
498{
499	if (__ath_reg_dyn_country(wiphy, reg, request))
500		return;
501
502	printk(KERN_DEBUG "ath: regdomain 0x%0x "
503			  "dynamically updated by %s\n",
504	       reg->current_rd,
505	       reg_initiator_name(request->initiator));
506}
507
508void ath_reg_notifier_apply(struct wiphy *wiphy,
509			    struct regulatory_request *request,
510			    struct ath_regulatory *reg)
511{
512	struct ath_common *common = container_of(reg, struct ath_common,
513						 regulatory);
514	/* We always apply this */
515	ath_reg_apply_radar_flags(wiphy, reg);
516
517	/*
518	 * This would happen when we have sent a custom regulatory request
519	 * a world regulatory domain and the scheduler hasn't yet processed
520	 * any pending requests in the queue.
521	 */
522	if (!request)
523		return;
524
525	reg->region = request->dfs_region;
526	switch (request->initiator) {
527	case NL80211_REGDOM_SET_BY_CORE:
528		/*
529		 * If common->reg_world_copy is world roaming it means we *were*
530		 * world roaming... so we now have to restore that data.
531		 */
532		if (!ath_is_world_regd(&common->reg_world_copy))
533			break;
534
535		memcpy(reg, &common->reg_world_copy,
536		       sizeof(struct ath_regulatory));
537		break;
538	case NL80211_REGDOM_SET_BY_DRIVER:
539		break;
540	case NL80211_REGDOM_SET_BY_USER:
541		if (ath_reg_dyn_country_user_allow(reg))
542			ath_reg_dyn_country(wiphy, reg, request);
543		break;
544	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
545		ath_reg_dyn_country(wiphy, reg, request);
546		break;
547	}
548}
549EXPORT_SYMBOL(ath_reg_notifier_apply);
550
551static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
552{
553	u16 rd = ath_regd_get_eepromRD(reg);
554	int i;
555
556	if (rd & COUNTRY_ERD_FLAG) {
557		/* EEPROM value is a country code */
558		u16 cc = rd & ~COUNTRY_ERD_FLAG;
559		printk(KERN_DEBUG
560		       "ath: EEPROM indicates we should expect "
561			"a country code\n");
562		for (i = 0; i < ARRAY_SIZE(allCountries); i++)
563			if (allCountries[i].countryCode == cc)
564				return true;
565	} else {
566		/* EEPROM value is a regpair value */
567		if (rd != CTRY_DEFAULT)
568			printk(KERN_DEBUG "ath: EEPROM indicates we "
569			       "should expect a direct regpair map\n");
570		for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
571			if (regDomainPairs[i].reg_domain == rd)
572				return true;
573	}
574	printk(KERN_DEBUG
575		 "ath: invalid regulatory domain/country code 0x%x\n", rd);
576	return false;
577}
578
579/* EEPROM country code to regpair mapping */
580static struct country_code_to_enum_rd*
581ath_regd_find_country(u16 countryCode)
582{
583	int i;
584
585	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
586		if (allCountries[i].countryCode == countryCode)
587			return &allCountries[i];
588	}
589	return NULL;
590}
591
592/* EEPROM rd code to regpair mapping */
593static struct country_code_to_enum_rd*
594ath_regd_find_country_by_rd(int regdmn)
595{
596	int i;
597
598	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
599		if (allCountries[i].regDmnEnum == regdmn)
600			return &allCountries[i];
601	}
602	return NULL;
603}
604
605/* Returns the map of the EEPROM set RD to a country code */
606static u16 ath_regd_get_default_country(u16 rd)
607{
608	if (rd & COUNTRY_ERD_FLAG) {
609		struct country_code_to_enum_rd *country = NULL;
610		u16 cc = rd & ~COUNTRY_ERD_FLAG;
611
612		country = ath_regd_find_country(cc);
613		if (country != NULL)
614			return cc;
615	}
616
617	return CTRY_DEFAULT;
618}
619
620static struct reg_dmn_pair_mapping*
621ath_get_regpair(int regdmn)
622{
623	int i;
624
625	if (regdmn == NO_ENUMRD)
626		return NULL;
627	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
628		if (regDomainPairs[i].reg_domain == regdmn)
629			return &regDomainPairs[i];
630	}
631	return NULL;
632}
633
634static int
635ath_regd_init_wiphy(struct ath_regulatory *reg,
636		    struct wiphy *wiphy,
637		    void (*reg_notifier)(struct wiphy *wiphy,
638					 struct regulatory_request *request))
639{
640	const struct ieee80211_regdomain *regd;
641
642	wiphy->reg_notifier = reg_notifier;
643	wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
644				   REGULATORY_CUSTOM_REG;
645
646	if (ath_is_world_regd(reg)) {
647		/*
648		 * Anything applied here (prior to wiphy registration) gets
649		 * saved on the wiphy orig_* parameters
650		 */
651		regd = ath_world_regdomain(reg);
652		wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER;
653	} else {
654		/*
655		 * This gets applied in the case of the absence of CRDA,
656		 * it's our own custom world regulatory domain, similar to
657		 * cfg80211's but we enable passive scanning.
658		 */
659		regd = ath_default_world_regdomain();
660	}
661
662	wiphy_apply_custom_regulatory(wiphy, regd);
663	ath_reg_apply_radar_flags(wiphy, reg);
664	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
665	return 0;
666}
667
668/*
669 * Some users have reported their EEPROM programmed with
670 * 0x8000 set, this is not a supported regulatory domain
671 * but since we have more than one user with it we need
672 * a solution for them. We default to 0x64, which is the
673 * default Atheros world regulatory domain.
674 */
675static void ath_regd_sanitize(struct ath_regulatory *reg)
676{
677	if (reg->current_rd != COUNTRY_ERD_FLAG)
678		return;
679	printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
680	reg->current_rd = 0x64;
681}
682
683static int __ath_regd_init(struct ath_regulatory *reg)
684{
685	struct country_code_to_enum_rd *country = NULL;
686	u16 regdmn;
687
688	if (!reg)
689		return -EINVAL;
690
691	ath_regd_sanitize(reg);
692
693	printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
694
695	if (!ath_regd_is_eeprom_valid(reg)) {
696		pr_err("Invalid EEPROM contents\n");
697		return -EINVAL;
698	}
699
700	regdmn = ath_regd_get_eepromRD(reg);
701	reg->country_code = ath_regd_get_default_country(regdmn);
702
703	if (reg->country_code == CTRY_DEFAULT &&
704	    regdmn == CTRY_DEFAULT) {
705		printk(KERN_DEBUG "ath: EEPROM indicates default "
706		       "country code should be used\n");
707		reg->country_code = CTRY_UNITED_STATES;
708	}
709
710	if (reg->country_code == CTRY_DEFAULT) {
711		country = NULL;
712	} else {
713		printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
714		       "map search\n");
715		country = ath_regd_find_country(reg->country_code);
716		if (country == NULL) {
717			printk(KERN_DEBUG
718				"ath: no valid country maps found for "
719				"country code: 0x%0x\n",
720				reg->country_code);
721			return -EINVAL;
722		} else {
723			regdmn = country->regDmnEnum;
724			printk(KERN_DEBUG "ath: country maps to "
725			       "regdmn code: 0x%0x\n",
726			       regdmn);
727		}
728	}
729
730	reg->regpair = ath_get_regpair(regdmn);
731
732	if (!reg->regpair) {
733		printk(KERN_DEBUG "ath: "
734			"No regulatory domain pair found, cannot continue\n");
735		return -EINVAL;
736	}
737
738	if (!country)
739		country = ath_regd_find_country_by_rd(regdmn);
740
741	if (country) {
742		reg->alpha2[0] = country->isoName[0];
743		reg->alpha2[1] = country->isoName[1];
744	} else {
745		reg->alpha2[0] = '0';
746		reg->alpha2[1] = '0';
747	}
748
749	printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
750		reg->alpha2[0], reg->alpha2[1]);
751	printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
752		reg->regpair->reg_domain);
753
754	return 0;
755}
756
757int
758ath_regd_init(struct ath_regulatory *reg,
759	      struct wiphy *wiphy,
760	      void (*reg_notifier)(struct wiphy *wiphy,
761				   struct regulatory_request *request))
762{
763	struct ath_common *common = container_of(reg, struct ath_common,
764						 regulatory);
765	int r;
766
767	r = __ath_regd_init(reg);
768	if (r)
769		return r;
770
771	if (ath_is_world_regd(reg))
772		memcpy(&common->reg_world_copy, reg,
773		       sizeof(struct ath_regulatory));
774
775	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
776
777	return 0;
778}
779EXPORT_SYMBOL(ath_regd_init);
780
781u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
782			  enum nl80211_band band)
783{
784	if (!reg->regpair ||
785	    (reg->country_code == CTRY_DEFAULT &&
786	     is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
787		return SD_NO_CTL;
788	}
789
790	if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) {
791		switch (reg->region) {
792		case NL80211_DFS_FCC:
793			return CTL_FCC;
794		case NL80211_DFS_ETSI:
795			return CTL_ETSI;
796		case NL80211_DFS_JP:
797			return CTL_MKK;
798		default:
799			break;
800		}
801	}
802
803	switch (band) {
804	case NL80211_BAND_2GHZ:
805		return reg->regpair->reg_2ghz_ctl;
806	case NL80211_BAND_5GHZ:
807		return reg->regpair->reg_5ghz_ctl;
808	default:
809		return NO_CTL;
810	}
811}
812EXPORT_SYMBOL(ath_regd_get_band_ctl);
813