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