| /* |
| * Copyright (c) 2008-2009 Atheros Communications Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <net/cfg80211.h> |
| #include <net/mac80211.h> |
| #include "regd.h" |
| #include "regd_common.h" |
| |
| /* |
| * This is a set of common rules used by our world regulatory domains. |
| * We have 12 world regulatory domains. To save space we consolidate |
| * the regulatory domains in 5 structures by frequency and change |
| * the flags on our reg_notifier() on a case by case basis. |
| */ |
| |
| /* Only these channels all allow active scan on all world regulatory domains */ |
| #define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0) |
| |
| /* We enable active scan on these a case by case basis by regulatory domain */ |
| #define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\ |
| NL80211_RRF_PASSIVE_SCAN) |
| #define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\ |
| NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM) |
| |
| /* We allow IBSS on these on a case by case basis by regulatory domain */ |
| #define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\ |
| NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) |
| #define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\ |
| NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) |
| #define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\ |
| NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS) |
| |
| #define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \ |
| ATH9K_2GHZ_CH12_13, \ |
| ATH9K_2GHZ_CH14 |
| |
| #define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \ |
| ATH9K_5GHZ_5470_5850 |
| |
| /* This one skips what we call "mid band" */ |
| #define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \ |
| ATH9K_5GHZ_5725_5850 |
| |
| /* Can be used for: |
| * 0x60, 0x61, 0x62 */ |
| static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = { |
| .n_reg_rules = 5, |
| .alpha2 = "99", |
| .reg_rules = { |
| ATH9K_2GHZ_ALL, |
| ATH9K_5GHZ_ALL, |
| } |
| }; |
| |
| /* Can be used by 0x63 and 0x65 */ |
| static const struct ieee80211_regdomain ath_world_regdom_63_65 = { |
| .n_reg_rules = 4, |
| .alpha2 = "99", |
| .reg_rules = { |
| ATH9K_2GHZ_CH01_11, |
| ATH9K_2GHZ_CH12_13, |
| ATH9K_5GHZ_NO_MIDBAND, |
| } |
| }; |
| |
| /* Can be used by 0x64 only */ |
| static const struct ieee80211_regdomain ath_world_regdom_64 = { |
| .n_reg_rules = 3, |
| .alpha2 = "99", |
| .reg_rules = { |
| ATH9K_2GHZ_CH01_11, |
| ATH9K_5GHZ_NO_MIDBAND, |
| } |
| }; |
| |
| /* Can be used by 0x66 and 0x69 */ |
| static const struct ieee80211_regdomain ath_world_regdom_66_69 = { |
| .n_reg_rules = 3, |
| .alpha2 = "99", |
| .reg_rules = { |
| ATH9K_2GHZ_CH01_11, |
| ATH9K_5GHZ_ALL, |
| } |
| }; |
| |
| /* Can be used by 0x67, 0x6A and 0x68 */ |
| static const struct ieee80211_regdomain ath_world_regdom_67_68_6A = { |
| .n_reg_rules = 4, |
| .alpha2 = "99", |
| .reg_rules = { |
| ATH9K_2GHZ_CH01_11, |
| ATH9K_2GHZ_CH12_13, |
| ATH9K_5GHZ_ALL, |
| } |
| }; |
| |
| static inline bool is_wwr_sku(u16 regd) |
| { |
| return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) && |
| (((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) || |
| (regd == WORLD)); |
| } |
| |
| static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg) |
| { |
| return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG; |
| } |
| |
| bool ath_is_world_regd(struct ath_regulatory *reg) |
| { |
| return is_wwr_sku(ath_regd_get_eepromRD(reg)); |
| } |
| EXPORT_SYMBOL(ath_is_world_regd); |
| |
| static const struct ieee80211_regdomain *ath_default_world_regdomain(void) |
| { |
| /* this is the most restrictive */ |
| return &ath_world_regdom_64; |
| } |
| |
| static const struct |
| ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg) |
| { |
| switch (reg->regpair->regDmnEnum) { |
| case 0x60: |
| case 0x61: |
| case 0x62: |
| return &ath_world_regdom_60_61_62; |
| case 0x63: |
| case 0x65: |
| return &ath_world_regdom_63_65; |
| case 0x64: |
| return &ath_world_regdom_64; |
| case 0x66: |
| case 0x69: |
| return &ath_world_regdom_66_69; |
| case 0x67: |
| case 0x68: |
| case 0x6A: |
| return &ath_world_regdom_67_68_6A; |
| default: |
| WARN_ON(1); |
| return ath_default_world_regdomain(); |
| } |
| } |
| |
| bool ath_is_49ghz_allowed(u16 regdomain) |
| { |
| /* possibly more */ |
| return regdomain == MKK9_MKKC; |
| } |
| EXPORT_SYMBOL(ath_is_49ghz_allowed); |
| |
| /* Frequency is one where radar detection is required */ |
| static bool ath_is_radar_freq(u16 center_freq) |
| { |
| return (center_freq >= 5260 && center_freq <= 5700); |
| } |
| |
| /* |
| * N.B: These exception rules do not apply radar freqs. |
| * |
| * - We enable adhoc (or beaconing) if allowed by 11d |
| * - We enable active scan if the channel is allowed by 11d |
| * - If no country IE has been processed and a we determine we have |
| * received a beacon on a channel we can enable active scan and |
| * adhoc (or beaconing). |
| */ |
| static void |
| ath_reg_apply_beaconing_flags(struct wiphy *wiphy, |
| enum nl80211_reg_initiator initiator) |
| { |
| enum ieee80211_band band; |
| struct ieee80211_supported_band *sband; |
| const struct ieee80211_reg_rule *reg_rule; |
| struct ieee80211_channel *ch; |
| unsigned int i; |
| u32 bandwidth = 0; |
| int r; |
| |
| for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| |
| if (!wiphy->bands[band]) |
| continue; |
| |
| sband = wiphy->bands[band]; |
| |
| for (i = 0; i < sband->n_channels; i++) { |
| |
| ch = &sband->channels[i]; |
| |
| if (ath_is_radar_freq(ch->center_freq) || |
| (ch->flags & IEEE80211_CHAN_RADAR)) |
| continue; |
| |
| if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
| r = freq_reg_info(wiphy, |
| ch->center_freq, |
| bandwidth, |
| ®_rule); |
| if (r) |
| continue; |
| /* |
| * If 11d had a rule for this channel ensure |
| * we enable adhoc/beaconing if it allows us to |
| * use it. Note that we would have disabled it |
| * by applying our static world regdomain by |
| * default during init, prior to calling our |
| * regulatory_hint(). |
| */ |
| if (!(reg_rule->flags & |
| NL80211_RRF_NO_IBSS)) |
| ch->flags &= |
| ~IEEE80211_CHAN_NO_IBSS; |
| if (!(reg_rule->flags & |
| NL80211_RRF_PASSIVE_SCAN)) |
| ch->flags &= |
| ~IEEE80211_CHAN_PASSIVE_SCAN; |
| } else { |
| if (ch->beacon_found) |
| ch->flags &= ~(IEEE80211_CHAN_NO_IBSS | |
| IEEE80211_CHAN_PASSIVE_SCAN); |
| } |
| } |
| } |
| |
| } |
| |
| /* Allows active scan scan on Ch 12 and 13 */ |
| static void |
| ath_reg_apply_active_scan_flags(struct wiphy *wiphy, |
| enum nl80211_reg_initiator initiator) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_channel *ch; |
| const struct ieee80211_reg_rule *reg_rule; |
| u32 bandwidth = 0; |
| int r; |
| |
| sband = wiphy->bands[IEEE80211_BAND_2GHZ]; |
| |
| /* |
| * If no country IE has been received always enable active scan |
| * on these channels. This is only done for specific regulatory SKUs |
| */ |
| if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
| ch = &sband->channels[11]; /* CH 12 */ |
| if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) |
| ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
| ch = &sband->channels[12]; /* CH 13 */ |
| if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) |
| ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
| return; |
| } |
| |
| /* |
| * If a country IE has been recieved check its rule for this |
| * channel first before enabling active scan. The passive scan |
| * would have been enforced by the initial processing of our |
| * custom regulatory domain. |
| */ |
| |
| ch = &sband->channels[11]; /* CH 12 */ |
| r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule); |
| if (!r) { |
| if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) |
| if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) |
| ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
| } |
| |
| ch = &sband->channels[12]; /* CH 13 */ |
| r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule); |
| if (!r) { |
| if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) |
| if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) |
| ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
| } |
| } |
| |
| /* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */ |
| static void ath_reg_apply_radar_flags(struct wiphy *wiphy) |
| { |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_channel *ch; |
| unsigned int i; |
| |
| if (!wiphy->bands[IEEE80211_BAND_5GHZ]) |
| return; |
| |
| sband = wiphy->bands[IEEE80211_BAND_5GHZ]; |
| |
| for (i = 0; i < sband->n_channels; i++) { |
| ch = &sband->channels[i]; |
| if (!ath_is_radar_freq(ch->center_freq)) |
| continue; |
| /* We always enable radar detection/DFS on this |
| * frequency range. Additionally we also apply on |
| * this frequency range: |
| * - If STA mode does not yet have DFS supports disable |
| * active scanning |
| * - If adhoc mode does not support DFS yet then |
| * disable adhoc in the frequency. |
| * - If AP mode does not yet support radar detection/DFS |
| * do not allow AP mode |
| */ |
| if (!(ch->flags & IEEE80211_CHAN_DISABLED)) |
| ch->flags |= IEEE80211_CHAN_RADAR | |
| IEEE80211_CHAN_NO_IBSS | |
| IEEE80211_CHAN_PASSIVE_SCAN; |
| } |
| } |
| |
| static void ath_reg_apply_world_flags(struct wiphy *wiphy, |
| enum nl80211_reg_initiator initiator, |
| struct ath_regulatory *reg) |
| { |
| switch (reg->regpair->regDmnEnum) { |
| case 0x60: |
| case 0x63: |
| case 0x66: |
| case 0x67: |
| ath_reg_apply_beaconing_flags(wiphy, initiator); |
| break; |
| case 0x68: |
| ath_reg_apply_beaconing_flags(wiphy, initiator); |
| ath_reg_apply_active_scan_flags(wiphy, initiator); |
| break; |
| } |
| } |
| |
| int ath_reg_notifier_apply(struct wiphy *wiphy, |
| struct regulatory_request *request, |
| struct ath_regulatory *reg) |
| { |
| /* We always apply this */ |
| ath_reg_apply_radar_flags(wiphy); |
| |
| /* |
| * This would happen when we have sent a custom regulatory request |
| * a world regulatory domain and the scheduler hasn't yet processed |
| * any pending requests in the queue. |
| */ |
| if (!request) |
| return 0; |
| |
| switch (request->initiator) { |
| case NL80211_REGDOM_SET_BY_DRIVER: |
| case NL80211_REGDOM_SET_BY_CORE: |
| case NL80211_REGDOM_SET_BY_USER: |
| break; |
| case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
| if (ath_is_world_regd(reg)) |
| ath_reg_apply_world_flags(wiphy, request->initiator, |
| reg); |
| break; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(ath_reg_notifier_apply); |
| |
| static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg) |
| { |
| u16 rd = ath_regd_get_eepromRD(reg); |
| int i; |
| |
| if (rd & COUNTRY_ERD_FLAG) { |
| /* EEPROM value is a country code */ |
| u16 cc = rd & ~COUNTRY_ERD_FLAG; |
| printk(KERN_DEBUG |
| "ath: EEPROM indicates we should expect " |
| "a country code\n"); |
| for (i = 0; i < ARRAY_SIZE(allCountries); i++) |
| if (allCountries[i].countryCode == cc) |
| return true; |
| } else { |
| /* EEPROM value is a regpair value */ |
| if (rd != CTRY_DEFAULT) |
| printk(KERN_DEBUG "ath: EEPROM indicates we " |
| "should expect a direct regpair map\n"); |
| for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) |
| if (regDomainPairs[i].regDmnEnum == rd) |
| return true; |
| } |
| printk(KERN_DEBUG |
| "ath: invalid regulatory domain/country code 0x%x\n", rd); |
| return false; |
| } |
| |
| /* EEPROM country code to regpair mapping */ |
| static struct country_code_to_enum_rd* |
| ath_regd_find_country(u16 countryCode) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(allCountries); i++) { |
| if (allCountries[i].countryCode == countryCode) |
| return &allCountries[i]; |
| } |
| return NULL; |
| } |
| |
| /* EEPROM rd code to regpair mapping */ |
| static struct country_code_to_enum_rd* |
| ath_regd_find_country_by_rd(int regdmn) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(allCountries); i++) { |
| if (allCountries[i].regDmnEnum == regdmn) |
| return &allCountries[i]; |
| } |
| return NULL; |
| } |
| |
| /* Returns the map of the EEPROM set RD to a country code */ |
| static u16 ath_regd_get_default_country(u16 rd) |
| { |
| if (rd & COUNTRY_ERD_FLAG) { |
| struct country_code_to_enum_rd *country = NULL; |
| u16 cc = rd & ~COUNTRY_ERD_FLAG; |
| |
| country = ath_regd_find_country(cc); |
| if (country != NULL) |
| return cc; |
| } |
| |
| return CTRY_DEFAULT; |
| } |
| |
| static struct reg_dmn_pair_mapping* |
| ath_get_regpair(int regdmn) |
| { |
| int i; |
| |
| if (regdmn == NO_ENUMRD) |
| return NULL; |
| for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) { |
| if (regDomainPairs[i].regDmnEnum == regdmn) |
| return ®DomainPairs[i]; |
| } |
| return NULL; |
| } |
| |
| static int |
| ath_regd_init_wiphy(struct ath_regulatory *reg, |
| struct wiphy *wiphy, |
| int (*reg_notifier)(struct wiphy *wiphy, |
| struct regulatory_request *request)) |
| { |
| const struct ieee80211_regdomain *regd; |
| |
| wiphy->reg_notifier = reg_notifier; |
| wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY; |
| |
| if (ath_is_world_regd(reg)) { |
| /* |
| * Anything applied here (prior to wiphy registration) gets |
| * saved on the wiphy orig_* parameters |
| */ |
| regd = ath_world_regdomain(reg); |
| wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; |
| } else { |
| /* |
| * This gets applied in the case of the absense of CRDA, |
| * it's our own custom world regulatory domain, similar to |
| * cfg80211's but we enable passive scanning. |
| */ |
| regd = ath_default_world_regdomain(); |
| } |
| wiphy_apply_custom_regulatory(wiphy, regd); |
| ath_reg_apply_radar_flags(wiphy); |
| ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); |
| return 0; |
| } |
| |
| /* |
| * Some users have reported their EEPROM programmed with |
| * 0x8000 set, this is not a supported regulatory domain |
| * but since we have more than one user with it we need |
| * a solution for them. We default to 0x64, which is the |
| * default Atheros world regulatory domain. |
| */ |
| static void ath_regd_sanitize(struct ath_regulatory *reg) |
| { |
| if (reg->current_rd != COUNTRY_ERD_FLAG) |
| return; |
| printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n"); |
| reg->current_rd = 0x64; |
| } |
| |
| int |
| ath_regd_init(struct ath_regulatory *reg, |
| struct wiphy *wiphy, |
| int (*reg_notifier)(struct wiphy *wiphy, |
| struct regulatory_request *request)) |
| { |
| struct country_code_to_enum_rd *country = NULL; |
| u16 regdmn; |
| |
| if (!reg) |
| return -EINVAL; |
| |
| ath_regd_sanitize(reg); |
| |
| printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd); |
| |
| if (!ath_regd_is_eeprom_valid(reg)) { |
| printk(KERN_ERR "ath: Invalid EEPROM contents\n"); |
| return -EINVAL; |
| } |
| |
| regdmn = ath_regd_get_eepromRD(reg); |
| reg->country_code = ath_regd_get_default_country(regdmn); |
| |
| if (reg->country_code == CTRY_DEFAULT && |
| regdmn == CTRY_DEFAULT) { |
| printk(KERN_DEBUG "ath: EEPROM indicates default " |
| "country code should be used\n"); |
| reg->country_code = CTRY_UNITED_STATES; |
| } |
| |
| if (reg->country_code == CTRY_DEFAULT) { |
| country = NULL; |
| } else { |
| printk(KERN_DEBUG "ath: doing EEPROM country->regdmn " |
| "map search\n"); |
| country = ath_regd_find_country(reg->country_code); |
| if (country == NULL) { |
| printk(KERN_DEBUG |
| "ath: no valid country maps found for " |
| "country code: 0x%0x\n", |
| reg->country_code); |
| return -EINVAL; |
| } else { |
| regdmn = country->regDmnEnum; |
| printk(KERN_DEBUG "ath: country maps to " |
| "regdmn code: 0x%0x\n", |
| regdmn); |
| } |
| } |
| |
| reg->regpair = ath_get_regpair(regdmn); |
| |
| if (!reg->regpair) { |
| printk(KERN_DEBUG "ath: " |
| "No regulatory domain pair found, cannot continue\n"); |
| return -EINVAL; |
| } |
| |
| if (!country) |
| country = ath_regd_find_country_by_rd(regdmn); |
| |
| if (country) { |
| reg->alpha2[0] = country->isoName[0]; |
| reg->alpha2[1] = country->isoName[1]; |
| } else { |
| reg->alpha2[0] = '0'; |
| reg->alpha2[1] = '0'; |
| } |
| |
| printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n", |
| reg->alpha2[0], reg->alpha2[1]); |
| printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n", |
| reg->regpair->regDmnEnum); |
| |
| ath_regd_init_wiphy(reg, wiphy, reg_notifier); |
| return 0; |
| } |
| EXPORT_SYMBOL(ath_regd_init); |
| |
| u32 ath_regd_get_band_ctl(struct ath_regulatory *reg, |
| enum ieee80211_band band) |
| { |
| if (!reg->regpair || |
| (reg->country_code == CTRY_DEFAULT && |
| is_wwr_sku(ath_regd_get_eepromRD(reg)))) { |
| return SD_NO_CTL; |
| } |
| |
| switch (band) { |
| case IEEE80211_BAND_2GHZ: |
| return reg->regpair->reg_2ghz_ctl; |
| case IEEE80211_BAND_5GHZ: |
| return reg->regpair->reg_5ghz_ctl; |
| default: |
| return NO_CTL; |
| } |
| } |
| EXPORT_SYMBOL(ath_regd_get_band_ctl); |