2 * Copyright (c) 2008 Atheros Communications Inc.
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.
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.
17 #include <linux/kernel.h>
18 #include <linux/slab.h>
20 #include "regd_common.h"
23 * This is a set of common rules used by our world regulatory domains.
24 * We have 12 world regulatory domains. To save space we consolidate
25 * the regulatory domains in 5 structures by frequency and change
26 * the flags on our reg_notifier() on a case by case basis.
29 /* Only these channels all allow active scan on all world regulatory domains */
30 #define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
32 /* We enable active scan on these a case by case basis by regulatory domain */
33 #define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
34 NL80211_RRF_PASSIVE_SCAN)
35 #define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
36 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
38 /* We allow IBSS on these on a case by case basis by regulatory domain */
39 #define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
40 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
41 #define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
42 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
43 #define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
44 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
46 #define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
50 #define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
52 /* This one skips what we call "mid band" */
53 #define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
58 static const struct ieee80211_regdomain ath9k_world_regdom_60_61_62 = {
67 /* Can be used by 0x63 and 0x65 */
68 static const struct ieee80211_regdomain ath9k_world_regdom_63_65 = {
74 ATH9K_5GHZ_NO_MIDBAND,
78 /* Can be used by 0x64 only */
79 static const struct ieee80211_regdomain ath9k_world_regdom_64 = {
84 ATH9K_5GHZ_NO_MIDBAND,
88 /* Can be used by 0x66 and 0x69 */
89 static const struct ieee80211_regdomain ath9k_world_regdom_66_69 = {
98 /* Can be used by 0x67, 0x6A and 0x68 */
99 static const struct ieee80211_regdomain ath9k_world_regdom_67_68_6A = {
109 static u16 ath9k_regd_get_eepromRD(struct ath_hw *ah)
111 return ah->regulatory.current_rd & ~WORLDWIDE_ROAMING_FLAG;
114 u16 ath9k_regd_get_rd(struct ath_hw *ah)
116 return ath9k_regd_get_eepromRD(ah);
119 bool ath9k_is_world_regd(struct ath_hw *ah)
124 const struct ieee80211_regdomain *ath9k_default_world_regdomain(void)
126 /* this is the most restrictive */
127 return &ath9k_world_regdom_64;
130 const struct ieee80211_regdomain *ath9k_world_regdomain(struct ath_hw *ah)
132 switch (ah->regulatory.regpair->regDmnEnum) {
136 return &ath9k_world_regdom_60_61_62;
139 return &ath9k_world_regdom_63_65;
141 return &ath9k_world_regdom_64;
144 return &ath9k_world_regdom_66_69;
148 return &ath9k_world_regdom_67_68_6A;
151 return ath9k_default_world_regdomain();
155 /* Frequency is one where radar detection is required */
156 static bool ath9k_is_radar_freq(u16 center_freq)
158 return (center_freq >= 5260 && center_freq <= 5700);
162 * Enable adhoc on 5 GHz if allowed by 11d.
163 * Remove passive scan if channel is allowed by 11d,
164 * except when on radar frequencies.
166 static void ath9k_reg_apply_5ghz_beaconing_flags(struct wiphy *wiphy,
167 enum reg_set_by setby)
169 struct ieee80211_supported_band *sband;
170 const struct ieee80211_reg_rule *reg_rule;
171 struct ieee80211_channel *ch;
176 if (setby != REGDOM_SET_BY_COUNTRY_IE)
178 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
181 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
182 for (i = 0; i < sband->n_channels; i++) {
183 ch = &sband->channels[i];
184 r = freq_reg_info(wiphy, ch->center_freq,
185 &bandwidth, ®_rule);
188 /* If 11d had a rule for this channel ensure we enable adhoc
189 * if it allows us to use it. Note that we would have disabled
190 * it by applying our static world regdomain by default during
192 if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
193 ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
194 if (!ath9k_is_radar_freq(ch->center_freq))
196 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
197 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
201 /* Allows active scan scan on Ch 12 and 13 */
202 static void ath9k_reg_apply_active_scan_flags(struct wiphy *wiphy,
203 enum reg_set_by setby)
205 struct ieee80211_supported_band *sband;
206 struct ieee80211_channel *ch;
207 const struct ieee80211_reg_rule *reg_rule;
211 /* Force passive scan on Channels 12-13 */
212 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
214 /* If no country IE has been received always enable active scan
215 * on these channels */
216 if (setby != REGDOM_SET_BY_COUNTRY_IE) {
217 ch = &sband->channels[11]; /* CH 12 */
218 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
219 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
220 ch = &sband->channels[12]; /* CH 13 */
221 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
222 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
226 /* If a country IE has been recieved check its rule for this
227 * channel first before enabling active scan. The passive scan
228 * would have been enforced by the initial probe processing on
229 * our custom regulatory domain. */
231 ch = &sband->channels[11]; /* CH 12 */
232 r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule);
234 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
235 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
236 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
239 ch = &sband->channels[12]; /* CH 13 */
240 r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule);
242 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
243 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
244 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
248 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
249 void ath9k_reg_apply_radar_flags(struct wiphy *wiphy)
251 struct ieee80211_supported_band *sband;
252 struct ieee80211_channel *ch;
255 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
258 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
260 for (i = 0; i < sband->n_channels; i++) {
261 ch = &sband->channels[i];
262 if (!ath9k_is_radar_freq(ch->center_freq))
264 /* We always enable radar detection/DFS on this
265 * frequency range. Additionally we also apply on
266 * this frequency range:
267 * - If STA mode does not yet have DFS supports disable
269 * - If adhoc mode does not support DFS yet then
270 * disable adhoc in the frequency.
271 * - If AP mode does not yet support radar detection/DFS
272 * do not allow AP mode
274 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
275 ch->flags |= IEEE80211_CHAN_RADAR |
276 IEEE80211_CHAN_NO_IBSS |
277 IEEE80211_CHAN_PASSIVE_SCAN;
281 void ath9k_reg_apply_world_flags(struct wiphy *wiphy, enum reg_set_by setby)
283 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
284 struct ath_softc *sc = hw->priv;
285 struct ath_hw *ah = sc->sc_ah;
287 switch (ah->regulatory.regpair->regDmnEnum) {
292 ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
295 ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
296 ath9k_reg_apply_active_scan_flags(wiphy, setby);
302 int ath9k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
304 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
305 struct ath_softc *sc = hw->priv;
307 /* We always apply this */
308 ath9k_reg_apply_radar_flags(wiphy);
310 switch (request->initiator) {
311 case REGDOM_SET_BY_DRIVER:
312 case REGDOM_SET_BY_INIT:
313 case REGDOM_SET_BY_CORE:
314 case REGDOM_SET_BY_USER:
316 case REGDOM_SET_BY_COUNTRY_IE:
317 if (ath9k_is_world_regd(sc->sc_ah))
318 ath9k_reg_apply_world_flags(wiphy, request->initiator);
325 bool ath9k_regd_is_eeprom_valid(struct ath_hw *ah)
327 u16 rd = ath9k_regd_get_eepromRD(ah);
330 if (rd & COUNTRY_ERD_FLAG) {
331 /* EEPROM value is a country code */
332 u16 cc = rd & ~COUNTRY_ERD_FLAG;
333 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
334 if (allCountries[i].countryCode == cc)
337 /* EEPROM value is a regpair value */
338 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
339 if (regDomainPairs[i].regDmnEnum == rd)
342 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
343 "invalid regulatory domain/country code 0x%x\n", rd);
347 /* EEPROM country code to regpair mapping */
348 static struct country_code_to_enum_rd*
349 ath9k_regd_find_country(u16 countryCode)
353 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
354 if (allCountries[i].countryCode == countryCode)
355 return &allCountries[i];
360 /* EEPROM rd code to regpair mapping */
361 static struct country_code_to_enum_rd*
362 ath9k_regd_find_country_by_rd(int regdmn)
366 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
367 if (allCountries[i].regDmnEnum == regdmn)
368 return &allCountries[i];
373 /* Returns the map of the EEPROM set RD to a country code */
374 static u16 ath9k_regd_get_default_country(struct ath_hw *ah)
378 rd = ath9k_regd_get_eepromRD(ah);
379 if (rd & COUNTRY_ERD_FLAG) {
380 struct country_code_to_enum_rd *country = NULL;
381 u16 cc = rd & ~COUNTRY_ERD_FLAG;
383 country = ath9k_regd_find_country(cc);
391 static struct reg_dmn_pair_mapping*
392 ath9k_get_regpair(int regdmn)
396 if (regdmn == NO_ENUMRD)
398 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
399 if (regDomainPairs[i].regDmnEnum == regdmn)
400 return ®DomainPairs[i];
405 int ath9k_regd_init(struct ath_hw *ah)
407 struct country_code_to_enum_rd *country = NULL;
410 if (!ath9k_regd_is_eeprom_valid(ah)) {
411 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
412 "Invalid EEPROM contents\n");
416 ah->regulatory.country_code = ath9k_regd_get_default_country(ah);
418 if (ah->regulatory.country_code == CTRY_DEFAULT &&
419 ath9k_regd_get_eepromRD(ah) == CTRY_DEFAULT)
420 ah->regulatory.country_code = CTRY_UNITED_STATES;
422 if (ah->regulatory.country_code == CTRY_DEFAULT) {
423 regdmn = ath9k_regd_get_eepromRD(ah);
426 country = ath9k_regd_find_country(ah->regulatory.country_code);
427 if (country == NULL) {
428 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
429 "Country is NULL!!!!, cc= %d\n",
430 ah->regulatory.country_code);
433 regdmn = country->regDmnEnum;
436 ah->regulatory.current_rd_inuse = regdmn;
437 ah->regulatory.regpair = ath9k_get_regpair(regdmn);
439 if (!ah->regulatory.regpair) {
440 DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
441 "No regulatory domain pair found, cannot continue\n");
446 country = ath9k_regd_find_country_by_rd(regdmn);
449 ah->regulatory.alpha2[0] = country->isoName[0];
450 ah->regulatory.alpha2[1] = country->isoName[1];
452 ah->regulatory.alpha2[0] = '0';
453 ah->regulatory.alpha2[1] = '0';
456 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
457 "Country alpha2 being used: %c%c\n"
458 "Regulatory.Regpair detected: 0x%0x\n",
459 ah->regulatory.alpha2[0], ah->regulatory.alpha2[1],
460 ah->regulatory.regpair->regDmnEnum);
465 u32 ath9k_regd_get_ctl(struct ath_hw *ah, struct ath9k_channel *chan)
469 if (!ah->regulatory.regpair ||
470 (ah->regulatory.country_code == CTRY_DEFAULT && isWwrSKU(ah))) {
472 ctl = SD_NO_CTL | CTL_11B;
473 else if (IS_CHAN_G(chan))
474 ctl = SD_NO_CTL | CTL_11G;
476 ctl = SD_NO_CTL | CTL_11A;
481 ctl = ah->regulatory.regpair->reg_2ghz_ctl | CTL_11B;
482 else if (IS_CHAN_G(chan))
483 ctl = ah->regulatory.regpair->reg_5ghz_ctl | CTL_11G;
485 ctl = ah->regulatory.regpair->reg_5ghz_ctl | CTL_11A;