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 | |
26 | static 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 */ |
66 | static 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 */ |
76 | static 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 */ |
87 | static 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 */ |
97 | static 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 */ |
107 | static 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 | |
117 | static 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 | |
189 | static 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 | |
198 | static 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 | |
205 | static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg) |
206 | { |
207 | return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG; |
208 | } |
209 | |
210 | bool ath_is_world_regd(struct ath_regulatory *reg) |
211 | { |
212 | return is_wwr_sku(regd: ath_regd_get_eepromRD(reg)); |
213 | } |
214 | EXPORT_SYMBOL(ath_is_world_regd); |
215 | |
216 | static const struct ieee80211_regdomain *ath_default_world_regdomain(void) |
217 | { |
218 | /* this is the most restrictive */ |
219 | return &ath_world_regdom_64; |
220 | } |
221 | |
222 | static const struct |
223 | ieee80211_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 | |
249 | bool ath_is_49ghz_allowed(u16 regdomain) |
250 | { |
251 | /* possibly more */ |
252 | return regdomain == MKK9_MKKC; |
253 | } |
254 | EXPORT_SYMBOL(ath_is_49ghz_allowed); |
255 | |
256 | /* Frequency is one where radar detection is required */ |
257 | static 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 | |
266 | static 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(ptr: 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 | |
280 | static 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, freq: center_freq); |
285 | if (!ch) |
286 | return; |
287 | |
288 | ath_force_clear_no_ir_chan(wiphy, ch); |
289 | } |
290 | |
291 | static void ath_force_no_ir_chan(struct ieee80211_channel *ch) |
292 | { |
293 | ch->flags |= IEEE80211_CHAN_NO_IR; |
294 | } |
295 | |
296 | static 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, freq: center_freq); |
301 | if (!ch) |
302 | return; |
303 | |
304 | ath_force_no_ir_chan(ch); |
305 | } |
306 | |
307 | static 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(center_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 | */ |
338 | static void |
339 | ath_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 | */ |
375 | static void |
376 | ath_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, center_freq: 2467); |
389 | ath_force_clear_no_ir_freq(wiphy, center_freq: 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, center_freq: 2467); |
395 | ath_force_clear_no_ir_freq(wiphy, center_freq: 2472); |
396 | break; |
397 | default: |
398 | ath_force_no_ir_freq(wiphy, center_freq: 2467); |
399 | ath_force_no_ir_freq(wiphy, center_freq: 2472); |
400 | } |
401 | } |
402 | |
403 | /* Always apply Radar/DFS rules on freq range 5500 MHz - 5700 MHz */ |
404 | static 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(center_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 | |
436 | static 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 | |
458 | u16 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(p: allCountries[i].isoName, q: alpha2, size: 2)) |
464 | return allCountries[i].countryCode; |
465 | } |
466 | |
467 | return -1; |
468 | } |
469 | EXPORT_SYMBOL(ath_regd_find_country_by_name); |
470 | |
471 | static 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, initiator: request->initiator, reg); |
491 | |
492 | return 0; |
493 | } |
494 | |
495 | static 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 | |
508 | void 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 | } |
549 | EXPORT_SYMBOL(ath_reg_notifier_apply); |
550 | |
551 | static 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 */ |
580 | static struct country_code_to_enum_rd* |
581 | ath_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 */ |
593 | static struct country_code_to_enum_rd* |
594 | ath_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 */ |
606 | static 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(countryCode: cc); |
613 | if (country != NULL) |
614 | return cc; |
615 | } |
616 | |
617 | return CTRY_DEFAULT; |
618 | } |
619 | |
620 | static struct reg_dmn_pair_mapping* |
621 | ath_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 ®DomainPairs[i]; |
630 | } |
631 | return NULL; |
632 | } |
633 | |
634 | static int |
635 | ath_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, initiator: 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 | */ |
675 | static 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 | |
683 | static 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(rd: 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(countryCode: 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 | |
757 | int |
758 | ath_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 | } |
779 | EXPORT_SYMBOL(ath_regd_init); |
780 | |
781 | u32 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(regd: 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 | } |
812 | EXPORT_SYMBOL(ath_regd_get_band_ctl); |
813 | |