2 * Copyright (c) 2008-2009 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>
19 #include <net/wireless.h>
21 #include "regd_common.h"
24 * This is a set of common rules used by our world regulatory domains.
25 * We have 12 world regulatory domains. To save space we consolidate
26 * the regulatory domains in 5 structures by frequency and change
27 * the flags on our reg_notifier() on a case by case basis.
30 /* Only these channels all allow active scan on all world regulatory domains */
31 #define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
33 /* We enable active scan on these a case by case basis by regulatory domain */
34 #define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
35 NL80211_RRF_PASSIVE_SCAN)
36 #define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
37 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
39 /* We allow IBSS on these on a case by case basis by regulatory domain */
40 #define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
41 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
42 #define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
43 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
44 #define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
45 NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
47 #define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
51 #define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
53 /* This one skips what we call "mid band" */
54 #define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
59 static const struct ieee80211_regdomain ath9k_world_regdom_60_61_62 = {
68 /* Can be used by 0x63 and 0x65 */
69 static const struct ieee80211_regdomain ath9k_world_regdom_63_65 = {
75 ATH9K_5GHZ_NO_MIDBAND,
79 /* Can be used by 0x64 only */
80 static const struct ieee80211_regdomain ath9k_world_regdom_64 = {
85 ATH9K_5GHZ_NO_MIDBAND,
89 /* Can be used by 0x66 and 0x69 */
90 static const struct ieee80211_regdomain ath9k_world_regdom_66_69 = {
99 /* Can be used by 0x67, 0x6A and 0x68 */
100 static const struct ieee80211_regdomain ath9k_world_regdom_67_68_6A = {
110 static inline bool is_wwr_sku(u16 regd)
112 return ((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
116 static u16 ath9k_regd_get_eepromRD(struct ath9k_regulatory *reg)
118 return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
121 bool ath9k_is_world_regd(struct ath9k_regulatory *reg)
123 return is_wwr_sku(ath9k_regd_get_eepromRD(reg));
126 const struct ieee80211_regdomain *ath9k_default_world_regdomain(void)
128 /* this is the most restrictive */
129 return &ath9k_world_regdom_64;
133 ieee80211_regdomain *ath9k_world_regdomain(struct ath9k_regulatory *reg)
135 switch (reg->regpair->regDmnEnum) {
139 return &ath9k_world_regdom_60_61_62;
142 return &ath9k_world_regdom_63_65;
144 return &ath9k_world_regdom_64;
147 return &ath9k_world_regdom_66_69;
151 return &ath9k_world_regdom_67_68_6A;
154 return ath9k_default_world_regdomain();
158 /* Frequency is one where radar detection is required */
159 static bool ath9k_is_radar_freq(u16 center_freq)
161 return (center_freq >= 5260 && center_freq <= 5700);
165 * N.B: These exception rules do not apply radar freqs.
167 * - We enable adhoc (or beaconing) if allowed by 11d
168 * - We enable active scan if the channel is allowed by 11d
169 * - If no country IE has been processed and a we determine we have
170 * received a beacon on a channel we can enable active scan and
171 * adhoc (or beaconing).
173 static void ath9k_reg_apply_beaconing_flags(
175 enum nl80211_reg_initiator initiator)
177 enum ieee80211_band band;
178 struct ieee80211_supported_band *sband;
179 const struct ieee80211_reg_rule *reg_rule;
180 struct ieee80211_channel *ch;
185 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
187 if (!wiphy->bands[band])
190 sband = wiphy->bands[band];
192 for (i = 0; i < sband->n_channels; i++) {
194 ch = &sband->channels[i];
196 if (ath9k_is_radar_freq(ch->center_freq) ||
197 (ch->flags & IEEE80211_CHAN_RADAR))
200 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
201 r = freq_reg_info(wiphy, ch->center_freq,
202 &bandwidth, ®_rule);
206 * If 11d had a rule for this channel ensure
207 * we enable adhoc/beaconing if it allows us to
208 * use it. Note that we would have disabled it
209 * by applying our static world regdomain by
210 * default during init, prior to calling our
213 if (!(reg_rule->flags &
214 NL80211_RRF_NO_IBSS))
216 ~IEEE80211_CHAN_NO_IBSS;
217 if (!(reg_rule->flags &
218 NL80211_RRF_PASSIVE_SCAN))
220 ~IEEE80211_CHAN_PASSIVE_SCAN;
222 if (ch->beacon_found)
223 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
224 IEEE80211_CHAN_PASSIVE_SCAN);
231 /* Allows active scan scan on Ch 12 and 13 */
232 static void ath9k_reg_apply_active_scan_flags(
234 enum nl80211_reg_initiator initiator)
236 struct ieee80211_supported_band *sband;
237 struct ieee80211_channel *ch;
238 const struct ieee80211_reg_rule *reg_rule;
242 sband = wiphy->bands[IEEE80211_BAND_2GHZ];
245 * If no country IE has been received always enable active scan
246 * on these channels. This is only done for specific regulatory SKUs
248 if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
249 ch = &sband->channels[11]; /* CH 12 */
250 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
251 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
252 ch = &sband->channels[12]; /* CH 13 */
253 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
254 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
259 * If a country IE has been recieved check its rule for this
260 * channel first before enabling active scan. The passive scan
261 * would have been enforced by the initial processing of our
262 * custom regulatory domain.
265 ch = &sband->channels[11]; /* CH 12 */
266 r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule);
268 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
269 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
270 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
273 ch = &sband->channels[12]; /* CH 13 */
274 r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule);
276 if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
277 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
278 ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
282 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
283 void ath9k_reg_apply_radar_flags(struct wiphy *wiphy)
285 struct ieee80211_supported_band *sband;
286 struct ieee80211_channel *ch;
289 if (!wiphy->bands[IEEE80211_BAND_5GHZ])
292 sband = wiphy->bands[IEEE80211_BAND_5GHZ];
294 for (i = 0; i < sband->n_channels; i++) {
295 ch = &sband->channels[i];
296 if (!ath9k_is_radar_freq(ch->center_freq))
298 /* We always enable radar detection/DFS on this
299 * frequency range. Additionally we also apply on
300 * this frequency range:
301 * - If STA mode does not yet have DFS supports disable
303 * - If adhoc mode does not support DFS yet then
304 * disable adhoc in the frequency.
305 * - If AP mode does not yet support radar detection/DFS
306 * do not allow AP mode
308 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
309 ch->flags |= IEEE80211_CHAN_RADAR |
310 IEEE80211_CHAN_NO_IBSS |
311 IEEE80211_CHAN_PASSIVE_SCAN;
315 void ath9k_reg_apply_world_flags(struct wiphy *wiphy,
316 enum nl80211_reg_initiator initiator,
317 struct ath9k_regulatory *reg)
319 switch (reg->regpair->regDmnEnum) {
324 ath9k_reg_apply_beaconing_flags(wiphy, initiator);
327 ath9k_reg_apply_beaconing_flags(wiphy, initiator);
328 ath9k_reg_apply_active_scan_flags(wiphy, initiator);
334 static int ath9k_reg_notifier_apply(struct wiphy *wiphy,
335 struct regulatory_request *request, struct ath9k_regulatory *reg)
337 /* We always apply this */
338 ath9k_reg_apply_radar_flags(wiphy);
340 switch (request->initiator) {
341 case NL80211_REGDOM_SET_BY_DRIVER:
342 case NL80211_REGDOM_SET_BY_CORE:
343 case NL80211_REGDOM_SET_BY_USER:
345 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
346 if (ath9k_is_world_regd(reg))
347 ath9k_reg_apply_world_flags(wiphy, request->initiator,
355 int ath9k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
357 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
358 struct ath_wiphy *aphy = hw->priv;
359 struct ath_softc *sc = aphy->sc;
360 struct ath9k_regulatory *reg = &sc->sc_ah->regulatory;
362 return ath9k_reg_notifier_apply(wiphy, request, reg);
365 bool ath9k_regd_is_eeprom_valid(struct ath9k_regulatory *reg)
367 u16 rd = ath9k_regd_get_eepromRD(reg);
370 if (rd & COUNTRY_ERD_FLAG) {
371 /* EEPROM value is a country code */
372 u16 cc = rd & ~COUNTRY_ERD_FLAG;
373 for (i = 0; i < ARRAY_SIZE(allCountries); i++)
374 if (allCountries[i].countryCode == cc)
377 /* EEPROM value is a regpair value */
378 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
379 if (regDomainPairs[i].regDmnEnum == rd)
383 "ath9k: invalid regulatory domain/country code 0x%x\n", rd);
387 /* EEPROM country code to regpair mapping */
388 static struct country_code_to_enum_rd*
389 ath9k_regd_find_country(u16 countryCode)
393 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
394 if (allCountries[i].countryCode == countryCode)
395 return &allCountries[i];
400 /* EEPROM rd code to regpair mapping */
401 static struct country_code_to_enum_rd*
402 ath9k_regd_find_country_by_rd(int regdmn)
406 for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
407 if (allCountries[i].regDmnEnum == regdmn)
408 return &allCountries[i];
413 /* Returns the map of the EEPROM set RD to a country code */
414 static u16 ath9k_regd_get_default_country(u16 rd)
416 if (rd & COUNTRY_ERD_FLAG) {
417 struct country_code_to_enum_rd *country = NULL;
418 u16 cc = rd & ~COUNTRY_ERD_FLAG;
420 country = ath9k_regd_find_country(cc);
428 static struct reg_dmn_pair_mapping*
429 ath9k_get_regpair(int regdmn)
433 if (regdmn == NO_ENUMRD)
435 for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
436 if (regDomainPairs[i].regDmnEnum == regdmn)
437 return ®DomainPairs[i];
442 int ath9k_regd_init(struct ath9k_regulatory *reg)
444 struct country_code_to_enum_rd *country = NULL;
447 if (!ath9k_regd_is_eeprom_valid(reg)) {
448 printk(KERN_DEBUG "ath9k: Invalid EEPROM contents\n");
452 regdmn = ath9k_regd_get_eepromRD(reg);
453 reg->country_code = ath9k_regd_get_default_country(regdmn);
455 if (reg->country_code == CTRY_DEFAULT &&
456 regdmn == CTRY_DEFAULT)
457 reg->country_code = CTRY_UNITED_STATES;
459 if (reg->country_code == CTRY_DEFAULT) {
462 country = ath9k_regd_find_country(reg->country_code);
463 if (country == NULL) {
465 "ath9k: Country is NULL!!!!, cc= %d\n",
469 regdmn = country->regDmnEnum;
472 reg->regpair = ath9k_get_regpair(regdmn);
475 printk(KERN_DEBUG "ath9k: "
476 "No regulatory domain pair found, cannot continue\n");
481 country = ath9k_regd_find_country_by_rd(regdmn);
484 reg->alpha2[0] = country->isoName[0];
485 reg->alpha2[1] = country->isoName[1];
487 reg->alpha2[0] = '0';
488 reg->alpha2[1] = '0';
491 printk(KERN_DEBUG "ath9k: Country alpha2 being used: %c%c\n",
492 reg->alpha2[0], reg->alpha2[1]);
493 printk(KERN_DEBUG "ath9k: Regpair detected: 0x%0x\n",
494 reg->regpair->regDmnEnum);
500 u32 ath9k_regd_get_band_ctl(struct ath9k_regulatory *reg,
501 enum ieee80211_band band)
504 (reg->country_code == CTRY_DEFAULT &&
505 is_wwr_sku(ath9k_regd_get_eepromRD(reg)))) {
510 case IEEE80211_BAND_2GHZ:
511 return reg->regpair->reg_2ghz_ctl;
512 case IEEE80211_BAND_5GHZ:
513 return reg->regpair->reg_5ghz_ctl;
521 u32 ath9k_regd_get_ctl(struct ath9k_regulatory *reg, struct ath9k_channel *chan)
523 u32 ctl = ath9k_regd_get_band_ctl(reg, chan->chan->band);
527 else if (IS_CHAN_G(chan))