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
;