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>
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(
173 enum nl80211_reg_initiator initiator
)
175 enum ieee80211_band band
;
176 struct ieee80211_supported_band
*sband
;
177 const struct ieee80211_reg_rule
*reg_rule
;
178 struct ieee80211_channel
*ch
;
183 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
185 if (!wiphy
->bands
[band
])
188 sband
= wiphy
->bands
[band
];
190 for (i
= 0; i
< sband
->n_channels
; i
++) {
192 ch
= &sband
->channels
[i
];
194 if (ath9k_is_radar_freq(ch
->center_freq
) ||
195 (ch
->flags
& IEEE80211_CHAN_RADAR
))
198 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
199 r
= freq_reg_info(wiphy
, ch
->center_freq
,
200 &bandwidth
, ®_rule
);
204 * If 11d had a rule for this channel ensure
205 * we enable adhoc/beaconing if it allows us to
206 * use it. Note that we would have disabled it
207 * by applying our static world regdomain by
208 * default during init, prior to calling our
211 if (!(reg_rule
->flags
&
212 NL80211_RRF_NO_IBSS
))
214 ~IEEE80211_CHAN_NO_IBSS
;
215 if (!(reg_rule
->flags
&
216 NL80211_RRF_PASSIVE_SCAN
))
218 ~IEEE80211_CHAN_PASSIVE_SCAN
;
220 if (ch
->beacon_found
)
221 ch
->flags
&= ~(IEEE80211_CHAN_NO_IBSS
|
222 IEEE80211_CHAN_PASSIVE_SCAN
);
229 /* Allows active scan scan on Ch 12 and 13 */
230 static void ath9k_reg_apply_active_scan_flags(
232 enum nl80211_reg_initiator initiator
)
234 struct ieee80211_supported_band
*sband
;
235 struct ieee80211_channel
*ch
;
236 const struct ieee80211_reg_rule
*reg_rule
;
240 sband
= wiphy
->bands
[IEEE80211_BAND_2GHZ
];
243 * If no country IE has been received always enable active scan
244 * on these channels. This is only done for specific regulatory SKUs
246 if (initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
247 ch
= &sband
->channels
[11]; /* CH 12 */
248 if (ch
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
)
249 ch
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
250 ch
= &sband
->channels
[12]; /* CH 13 */
251 if (ch
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
)
252 ch
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
257 * If a country IE has been recieved check its rule for this
258 * channel first before enabling active scan. The passive scan
259 * would have been enforced by the initial processing of our
260 * custom regulatory domain.
263 ch
= &sband
->channels
[11]; /* CH 12 */
264 r
= freq_reg_info(wiphy
, ch
->center_freq
, &bandwidth
, ®_rule
);
266 if (!(reg_rule
->flags
& NL80211_RRF_PASSIVE_SCAN
))
267 if (ch
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
)
268 ch
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
271 ch
= &sband
->channels
[12]; /* CH 13 */
272 r
= freq_reg_info(wiphy
, ch
->center_freq
, &bandwidth
, ®_rule
);
274 if (!(reg_rule
->flags
& NL80211_RRF_PASSIVE_SCAN
))
275 if (ch
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
)
276 ch
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
280 /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
281 void ath9k_reg_apply_radar_flags(struct wiphy
*wiphy
)
283 struct ieee80211_supported_band
*sband
;
284 struct ieee80211_channel
*ch
;
287 if (!wiphy
->bands
[IEEE80211_BAND_5GHZ
])
290 sband
= wiphy
->bands
[IEEE80211_BAND_5GHZ
];
292 for (i
= 0; i
< sband
->n_channels
; i
++) {
293 ch
= &sband
->channels
[i
];
294 if (!ath9k_is_radar_freq(ch
->center_freq
))
296 /* We always enable radar detection/DFS on this
297 * frequency range. Additionally we also apply on
298 * this frequency range:
299 * - If STA mode does not yet have DFS supports disable
301 * - If adhoc mode does not support DFS yet then
302 * disable adhoc in the frequency.
303 * - If AP mode does not yet support radar detection/DFS
304 * do not allow AP mode
306 if (!(ch
->flags
& IEEE80211_CHAN_DISABLED
))
307 ch
->flags
|= IEEE80211_CHAN_RADAR
|
308 IEEE80211_CHAN_NO_IBSS
|
309 IEEE80211_CHAN_PASSIVE_SCAN
;
313 void ath9k_reg_apply_world_flags(struct wiphy
*wiphy
,
314 enum nl80211_reg_initiator initiator
)
316 struct ieee80211_hw
*hw
= wiphy_to_ieee80211_hw(wiphy
);
317 struct ath_wiphy
*aphy
= hw
->priv
;
318 struct ath_softc
*sc
= aphy
->sc
;
319 struct ath_hw
*ah
= sc
->sc_ah
;
321 switch (ah
->regulatory
.regpair
->regDmnEnum
) {
326 ath9k_reg_apply_beaconing_flags(wiphy
, initiator
);
329 ath9k_reg_apply_beaconing_flags(wiphy
, initiator
);
330 ath9k_reg_apply_active_scan_flags(wiphy
, initiator
);
336 int ath9k_reg_notifier(struct wiphy
*wiphy
, struct regulatory_request
*request
)
338 struct ieee80211_hw
*hw
= wiphy_to_ieee80211_hw(wiphy
);
339 struct ath_wiphy
*aphy
= hw
->priv
;
340 struct ath_softc
*sc
= aphy
->sc
;
342 /* We always apply this */
343 ath9k_reg_apply_radar_flags(wiphy
);
345 switch (request
->initiator
) {
346 case NL80211_REGDOM_SET_BY_DRIVER
:
347 case NL80211_REGDOM_SET_BY_CORE
:
348 case NL80211_REGDOM_SET_BY_USER
:
350 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
351 if (ath9k_is_world_regd(sc
->sc_ah
))
352 ath9k_reg_apply_world_flags(wiphy
, request
->initiator
);
359 bool ath9k_regd_is_eeprom_valid(struct ath_hw
*ah
)
361 u16 rd
= ath9k_regd_get_eepromRD(ah
);
364 if (rd
& COUNTRY_ERD_FLAG
) {
365 /* EEPROM value is a country code */
366 u16 cc
= rd
& ~COUNTRY_ERD_FLAG
;
367 for (i
= 0; i
< ARRAY_SIZE(allCountries
); i
++)
368 if (allCountries
[i
].countryCode
== cc
)
371 /* EEPROM value is a regpair value */
372 for (i
= 0; i
< ARRAY_SIZE(regDomainPairs
); i
++)
373 if (regDomainPairs
[i
].regDmnEnum
== rd
)
376 DPRINTF(ah
->ah_sc
, ATH_DBG_REGULATORY
,
377 "invalid regulatory domain/country code 0x%x\n", rd
);
381 /* EEPROM country code to regpair mapping */
382 static struct country_code_to_enum_rd
*
383 ath9k_regd_find_country(u16 countryCode
)
387 for (i
= 0; i
< ARRAY_SIZE(allCountries
); i
++) {
388 if (allCountries
[i
].countryCode
== countryCode
)
389 return &allCountries
[i
];
394 /* EEPROM rd code to regpair mapping */
395 static struct country_code_to_enum_rd
*
396 ath9k_regd_find_country_by_rd(int regdmn
)
400 for (i
= 0; i
< ARRAY_SIZE(allCountries
); i
++) {
401 if (allCountries
[i
].regDmnEnum
== regdmn
)
402 return &allCountries
[i
];
407 /* Returns the map of the EEPROM set RD to a country code */
408 static u16
ath9k_regd_get_default_country(u16 rd
)
410 if (rd
& COUNTRY_ERD_FLAG
) {
411 struct country_code_to_enum_rd
*country
= NULL
;
412 u16 cc
= rd
& ~COUNTRY_ERD_FLAG
;
414 country
= ath9k_regd_find_country(cc
);
422 static struct reg_dmn_pair_mapping
*
423 ath9k_get_regpair(int regdmn
)
427 if (regdmn
== NO_ENUMRD
)
429 for (i
= 0; i
< ARRAY_SIZE(regDomainPairs
); i
++) {
430 if (regDomainPairs
[i
].regDmnEnum
== regdmn
)
431 return ®DomainPairs
[i
];
436 int ath9k_regd_init(struct ath_hw
*ah
)
438 struct country_code_to_enum_rd
*country
= NULL
;
441 if (!ath9k_regd_is_eeprom_valid(ah
)) {
442 DPRINTF(ah
->ah_sc
, ATH_DBG_REGULATORY
,
443 "Invalid EEPROM contents\n");
447 regdmn
= ath9k_regd_get_eepromRD(ah
);
448 ah
->regulatory
.country_code
= ath9k_regd_get_default_country(regdmn
);
450 if (ah
->regulatory
.country_code
== CTRY_DEFAULT
&&
451 regdmn
== CTRY_DEFAULT
)
452 ah
->regulatory
.country_code
= CTRY_UNITED_STATES
;
454 if (ah
->regulatory
.country_code
== CTRY_DEFAULT
) {
457 country
= ath9k_regd_find_country(ah
->regulatory
.country_code
);
458 if (country
== NULL
) {
459 DPRINTF(ah
->ah_sc
, ATH_DBG_REGULATORY
,
460 "Country is NULL!!!!, cc= %d\n",
461 ah
->regulatory
.country_code
);
464 regdmn
= country
->regDmnEnum
;
467 ah
->regulatory
.regpair
= ath9k_get_regpair(regdmn
);
469 if (!ah
->regulatory
.regpair
) {
470 DPRINTF(ah
->ah_sc
, ATH_DBG_FATAL
,
471 "No regulatory domain pair found, cannot continue\n");
476 country
= ath9k_regd_find_country_by_rd(regdmn
);
479 ah
->regulatory
.alpha2
[0] = country
->isoName
[0];
480 ah
->regulatory
.alpha2
[1] = country
->isoName
[1];
482 ah
->regulatory
.alpha2
[0] = '0';
483 ah
->regulatory
.alpha2
[1] = '0';
486 DPRINTF(ah
->ah_sc
, ATH_DBG_REGULATORY
,
487 "Country alpha2 being used: %c%c\n"
488 "Regulatory.Regpair detected: 0x%0x\n",
489 ah
->regulatory
.alpha2
[0], ah
->regulatory
.alpha2
[1],
490 ah
->regulatory
.regpair
->regDmnEnum
);
495 u32
ath9k_regd_get_ctl(struct ath_hw
*ah
, struct ath9k_channel
*chan
)
499 if (!ah
->regulatory
.regpair
||
500 (ah
->regulatory
.country_code
== CTRY_DEFAULT
&&
501 is_wwr_sku(ath9k_regd_get_eepromRD(ah
)))) {
503 ctl
= SD_NO_CTL
| CTL_11B
;
504 else if (IS_CHAN_G(chan
))
505 ctl
= SD_NO_CTL
| CTL_11G
;
507 ctl
= SD_NO_CTL
| CTL_11A
;
512 ctl
= ah
->regulatory
.regpair
->reg_2ghz_ctl
| CTL_11B
;
513 else if (IS_CHAN_G(chan
))
514 ctl
= ah
->regulatory
.regpair
->reg_2ghz_ctl
| CTL_11G
;
516 ctl
= ah
->regulatory
.regpair
->reg_5ghz_ctl
| CTL_11A
;