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 inline bool is_wwr_sku(u16 regd)
111 return ((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
115 static u16 ath9k_regd_get_eepromRD(struct ath_hw *ah)
117 return ah->regulatory.current_rd & ~WORLDWIDE_ROAMING_FLAG;
120 bool ath9k_is_world_regd(struct ath_hw *ah)
122 return is_wwr_sku(ath9k_regd_get_eepromRD(ah));
125 const struct ieee80211_regdomain *ath9k_default_world_regdomain(void)
127 /* this is the most restrictive */
128 return &ath9k_world_regdom_64;
131 const struct ieee80211_regdomain *ath9k_world_regdomain(struct ath_hw *ah)
133 switch (ah->regulatory.regpair->regDmnEnum) {
137 return &ath9k_world_regdom_60_61_62;
140 return &ath9k_world_regdom_63_65;
142 return &ath9k_world_regdom_64;
145 return &ath9k_world_regdom_66_69;
149 return &ath9k_world_regdom_67_68_6A;
152 return ath9k_default_world_regdomain();
156 /* Frequency is one where radar detection is required */
157 static bool ath9k_is_radar_freq(u16 center_freq)
159 return (center_freq >= 5260 && center_freq <= 5700);
163 * N.B: These exception rules do not apply radar freqs.
165 * - We enable adhoc (or beaconing) if allowed by 11d
166 * - We enable active scan if the channel is allowed by 11d
167 * - If no country IE has been processed and a we determine we have
168 * received a beacon on a channel we can enable active scan and
169 * adhoc (or beaconing).
171 static void ath9k_reg_apply_beaconing_flags(struct wiphy *wiphy,
172 enum reg_set_by setby)
174 enum ieee80211_band band;
175 struct ieee80211_supported_band *sband;
176 const struct ieee80211_reg_rule *reg_rule;
177 struct ieee80211_channel *ch;
182 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
184 if (!wiphy->bands[band])
187 sband = wiphy->bands[band];
189 for (i = 0; i < sband->n_channels; i++) {
191 ch = &sband->channels[i];
193 if (ath9k_is_radar_freq(ch->center_freq) ||
194 (ch->flags & IEEE80211_CHAN_RADAR))
197 if (setby == REGDOM_SET_BY_COUNTRY_IE) {
198 r = freq_reg_info(wiphy, ch->center_freq,
199 &bandwidth, ®_rule);
203 * If 11d had a rule for this channel ensure
204 * we enable adhoc/beaconing if it allows us to
205 * use it. Note that we would have disabled it
206 * by applying our static world regdomain by
207 * default during init, prior to calling our
210 if (!(reg_rule->flags &
211 NL80211_RRF_NO_IBSS))
213 ~IEEE80211_CHAN_NO_IBSS;
214 if (!(reg_rule->flags &
215 NL80211_RRF_PASSIVE_SCAN))
217 ~IEEE80211_CHAN_PASSIVE_SCAN;
219 if (ch->beacon_found)
220 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
221 IEEE80211_CHAN_PASSIVE_SCAN);
228 /* Allows active scan scan on Ch 12 and 13 */
229 static void ath9k_reg_apply_active_scan_flags(struct wiphy *wiphy,
230 enum reg_set_by setby)
232 struct ieee80211_supported_band *sband;
233 struct ieee80211_channel *ch;
234 const struct ieee80211_reg_rule *reg_rule;
238 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
241 * If no country IE has been received always enable active scan
242 * on these channels. This is only done for specific regulatory SKUs
244 if (setby != REGDOM_SET_BY_COUNTRY_IE) {
245 ch = &sband->channels[11]; /* CH 12 */
246 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
247 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
248 ch = &sband->channels[12]; /* CH 13 */
249 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
250 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
255 * If a country IE has been recieved check its rule for this
256 * channel first before enabling active scan. The passive scan
257 * would have been enforced by the initial processing of our
258 * custom regulatory domain.
261 ch = &sband->channels[11]; /* CH 12 */
262 r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule);
264 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
265 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
266 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
269 ch = &sband->channels[12]; /* CH 13 */
270 r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule);
272 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
273 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
274 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
278 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
279 void ath9k_reg_apply_radar_flags(struct wiphy *wiphy)
281 struct ieee80211_supported_band *sband;
282 struct ieee80211_channel *ch;
285 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
288 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
290 for (i = 0; i < sband->n_channels; i++) {
291 ch = &sband->channels[i];
292 if (!ath9k_is_radar_freq(ch->center_freq))
294 /* We always enable radar detection/DFS on this
295 * frequency range. Additionally we also apply on
296 * this frequency range:
297 * - If STA mode does not yet have DFS supports disable
299 * - If adhoc mode does not support DFS yet then
300 * disable adhoc in the frequency.
301 * - If AP mode does not yet support radar detection/DFS
302 * do not allow AP mode
304 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
305 ch->flags |= IEEE80211_CHAN_RADAR |
306 IEEE80211_CHAN_NO_IBSS |
307 IEEE80211_CHAN_PASSIVE_SCAN;
311 void ath9k_reg_apply_world_flags(struct wiphy *wiphy, enum reg_set_by setby)
313 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
314 struct ath_softc *sc = hw->priv;
315 struct ath_hw *ah = sc->sc_ah;
317 switch (ah->regulatory.regpair->regDmnEnum) {
322 ath9k_reg_apply_beaconing_flags(wiphy, setby);
325 ath9k_reg_apply_beaconing_flags(wiphy, setby);
326 ath9k_reg_apply_active_scan_flags(wiphy, setby);
332 int ath9k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
334 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
335 struct ath_softc *sc = hw->priv;
337 /* We always apply this */
338 ath9k_reg_apply_radar_flags(wiphy);
340 switch (request->initiator) {
341 case REGDOM_SET_BY_DRIVER:
342 case REGDOM_SET_BY_INIT:
343 case REGDOM_SET_BY_CORE:
344 case REGDOM_SET_BY_USER:
346 case REGDOM_SET_BY_COUNTRY_IE:
347 if (ath9k_is_world_regd(sc->sc_ah))
348 ath9k_reg_apply_world_flags(wiphy, request->initiator);
355 bool ath9k_regd_is_eeprom_valid(struct ath_hw *ah)
357 u16 rd = ath9k_regd_get_eepromRD(ah);
360 if (rd & COUNTRY_ERD_FLAG) {
361 /* EEPROM value is a country code */
362 u16 cc = rd & ~COUNTRY_ERD_FLAG;
363 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
364 if (allCountries[i].countryCode == cc)
367 /* EEPROM value is a regpair value */
368 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
369 if (regDomainPairs[i].regDmnEnum == rd)
372 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
373 "invalid regulatory domain/country code 0x%x\n", rd);
377 /* EEPROM country code to regpair mapping */
378 static struct country_code_to_enum_rd*
379 ath9k_regd_find_country(u16 countryCode)
383 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
384 if (allCountries[i].countryCode == countryCode)
385 return &allCountries[i];
390 /* EEPROM rd code to regpair mapping */
391 static struct country_code_to_enum_rd*
392 ath9k_regd_find_country_by_rd(int regdmn)
396 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
397 if (allCountries[i].regDmnEnum == regdmn)
398 return &allCountries[i];
403 /* Returns the map of the EEPROM set RD to a country code */
404 static u16 ath9k_regd_get_default_country(u16 rd)
406 if (rd & COUNTRY_ERD_FLAG) {
407 struct country_code_to_enum_rd *country = NULL;
408 u16 cc = rd & ~COUNTRY_ERD_FLAG;
410 country = ath9k_regd_find_country(cc);
418 static struct reg_dmn_pair_mapping*
419 ath9k_get_regpair(int regdmn)
423 if (regdmn == NO_ENUMRD)
425 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
426 if (regDomainPairs[i].regDmnEnum == regdmn)
427 return ®DomainPairs[i];
432 int ath9k_regd_init(struct ath_hw *ah)
434 struct country_code_to_enum_rd *country = NULL;
437 if (!ath9k_regd_is_eeprom_valid(ah)) {
438 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
439 "Invalid EEPROM contents\n");
443 regdmn = ath9k_regd_get_eepromRD(ah);
444 ah->regulatory.country_code = ath9k_regd_get_default_country(regdmn);
446 if (ah->regulatory.country_code == CTRY_DEFAULT &&
447 regdmn == CTRY_DEFAULT)
448 ah->regulatory.country_code = CTRY_UNITED_STATES;
450 if (ah->regulatory.country_code == CTRY_DEFAULT) {
453 country = ath9k_regd_find_country(ah->regulatory.country_code);
454 if (country == NULL) {
455 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
456 "Country is NULL!!!!, cc= %d\n",
457 ah->regulatory.country_code);
460 regdmn = country->regDmnEnum;
463 ah->regulatory.regpair = ath9k_get_regpair(regdmn);
465 if (!ah->regulatory.regpair) {
466 DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
467 "No regulatory domain pair found, cannot continue\n");
472 country = ath9k_regd_find_country_by_rd(regdmn);
475 ah->regulatory.alpha2[0] = country->isoName[0];
476 ah->regulatory.alpha2[1] = country->isoName[1];
478 ah->regulatory.alpha2[0] = '0';
479 ah->regulatory.alpha2[1] = '0';
482 DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
483 "Country alpha2 being used: %c%c\n"
484 "Regulatory.Regpair detected: 0x%0x\n",
485 ah->regulatory.alpha2[0], ah->regulatory.alpha2[1],
486 ah->regulatory.regpair->regDmnEnum);
491 u32 ath9k_regd_get_ctl(struct ath_hw *ah, struct ath9k_channel *chan)
495 if (!ah->regulatory.regpair ||
496 (ah->regulatory.country_code == CTRY_DEFAULT &&
497 is_wwr_sku(ath9k_regd_get_eepromRD(ah)))) {
499 ctl = SD_NO_CTL | CTL_11B;
500 else if (IS_CHAN_G(chan))
501 ctl = SD_NO_CTL | CTL_11G;
503 ctl = SD_NO_CTL | CTL_11A;
508 ctl = ah->regulatory.regpair->reg_2ghz_ctl | CTL_11B;
509 else if (IS_CHAN_G(chan))
510 ctl = ah->regulatory.regpair->reg_2ghz_ctl | CTL_11G;
512 ctl = ah->regulatory.regpair->reg_5ghz_ctl | CTL_11A;