/* * 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. */ #undef pr_fmt #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include "regd.h" #include "regd_common.h" static int __ath_regd_init(struct ath_regulatory *reg); /* * 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, 0x68, 0x6A and 0x6C */ static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = { .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: case 0x6C: return &ath_world_regdom_67_68_6A_6C; 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 (!sband) return; /* * 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 received 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: case 0x6C: 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; } } static u16 ath_regd_find_country_by_name(char *alpha2) { unsigned int i; for (i = 0; i < ARRAY_SIZE(allCountries); i++) { if (!memcmp(allCountries[i].isoName, alpha2, 2)) return allCountries[i].countryCode; } return -1; } int ath_reg_notifier_apply(struct wiphy *wiphy, struct regulatory_request *request, struct ath_regulatory *reg) { struct ath_common *common = container_of(reg, struct ath_common, regulatory); u16 country_code; /* 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_CORE: /* * If common->reg_world_copy is world roaming it means we *were* * world roaming... so we now have to restore that data. */ if (!ath_is_world_regd(&common->reg_world_copy)) break; memcpy(reg, &common->reg_world_copy, sizeof(struct ath_regulatory)); break; case NL80211_REGDOM_SET_BY_DRIVER: case NL80211_REGDOM_SET_BY_USER: break; case NL80211_REGDOM_SET_BY_COUNTRY_IE: if (!ath_is_world_regd(reg)) break; country_code = ath_regd_find_country_by_name(request->alpha2); if (country_code == (u16) -1) break; reg->current_rd = COUNTRY_ERD_FLAG; reg->current_rd |= country_code; printk(KERN_DEBUG "ath: regdomain 0x%0x updated by CountryIE\n", reg->current_rd); __ath_regd_init(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 absence 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; } static int __ath_regd_init(struct ath_regulatory *reg) { 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)) { pr_err("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); return 0; } int ath_regd_init(struct ath_regulatory *reg, struct wiphy *wiphy, int (*reg_notifier)(struct wiphy *wiphy, struct regulatory_request *request)) { struct ath_common *common = container_of(reg, struct ath_common, regulatory); int r; r = __ath_regd_init(reg); if (r) return r; if (ath_is_world_regd(reg)) memcpy(&common->reg_world_copy, reg, sizeof(struct ath_regulatory)); 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);