From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/net/wireless/rtlwifi/regd.c | 439 ++++++++++++++++++++++++++++++++++++ 1 file changed, 439 insertions(+) create mode 100644 drivers/net/wireless/rtlwifi/regd.c (limited to 'drivers/net/wireless/rtlwifi/regd.c') diff --git a/drivers/net/wireless/rtlwifi/regd.c b/drivers/net/wireless/rtlwifi/regd.c new file mode 100644 index 000000000..1893d01b9 --- /dev/null +++ b/drivers/net/wireless/rtlwifi/regd.c @@ -0,0 +1,439 @@ +/****************************************************************************** + * + * Copyright(c) 2009-2012 Realtek Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * The full GNU General Public License is included in this distribution in the + * file called LICENSE. + * + * Contact Information: + * wlanfae + * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, + * Hsinchu 300, Taiwan. + * + * Larry Finger + * + *****************************************************************************/ + +#include "wifi.h" +#include "regd.h" + +static struct country_code_to_enum_rd allCountries[] = { + {COUNTRY_CODE_FCC, "US"}, + {COUNTRY_CODE_IC, "US"}, + {COUNTRY_CODE_ETSI, "EC"}, + {COUNTRY_CODE_SPAIN, "EC"}, + {COUNTRY_CODE_FRANCE, "EC"}, + {COUNTRY_CODE_MKK, "JP"}, + {COUNTRY_CODE_MKK1, "JP"}, + {COUNTRY_CODE_ISRAEL, "EC"}, + {COUNTRY_CODE_TELEC, "JP"}, + {COUNTRY_CODE_MIC, "JP"}, + {COUNTRY_CODE_GLOBAL_DOMAIN, "JP"}, + {COUNTRY_CODE_WORLD_WIDE_13, "EC"}, + {COUNTRY_CODE_TELEC_NETGEAR, "EC"}, +}; + +/* + *Only these channels all allow active + *scan on all world regulatory domains + */ +#define RTL819x_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 RTL819x_2GHZ_CH12_13 \ + REG_RULE(2467-10, 2472+10, 40, 0, 20,\ + NL80211_RRF_PASSIVE_SCAN) + +#define RTL819x_2GHZ_CH14 \ + REG_RULE(2484-10, 2484+10, 40, 0, 20, \ + NL80211_RRF_PASSIVE_SCAN | \ + NL80211_RRF_NO_OFDM) + + +/* 5G chan 36 - chan 64*/ +#define RTL819x_5GHZ_5150_5350 \ + REG_RULE(5150-10, 5350+10, 80, 0, 30, 0) +/* 5G chan 100 - chan 165*/ +#define RTL819x_5GHZ_5470_5850 \ + REG_RULE(5470-10, 5850+10, 80, 0, 30, 0) +/* 5G chan 149 - chan 165*/ +#define RTL819x_5GHZ_5725_5850 \ + REG_RULE(5725-10, 5850+10, 80, 0, 30, 0) + +#define RTL819x_5GHZ_ALL \ + (RTL819x_5GHZ_5150_5350, RTL819x_5GHZ_5470_5850) + +static const struct ieee80211_regdomain rtl_regdom_11 = { + .n_reg_rules = 1, + .alpha2 = "99", + .reg_rules = { + RTL819x_2GHZ_CH01_11, + } +}; + +static const struct ieee80211_regdomain rtl_regdom_12_13 = { + .n_reg_rules = 2, + .alpha2 = "99", + .reg_rules = { + RTL819x_2GHZ_CH01_11, + RTL819x_2GHZ_CH12_13, + } +}; + +static const struct ieee80211_regdomain rtl_regdom_no_midband = { + .n_reg_rules = 3, + .alpha2 = "99", + .reg_rules = { + RTL819x_2GHZ_CH01_11, + RTL819x_5GHZ_5150_5350, + RTL819x_5GHZ_5725_5850, + } +}; + +static const struct ieee80211_regdomain rtl_regdom_60_64 = { + .n_reg_rules = 3, + .alpha2 = "99", + .reg_rules = { + RTL819x_2GHZ_CH01_11, + RTL819x_2GHZ_CH12_13, + RTL819x_5GHZ_5725_5850, + } +}; + +static const struct ieee80211_regdomain rtl_regdom_14_60_64 = { + .n_reg_rules = 4, + .alpha2 = "99", + .reg_rules = { + RTL819x_2GHZ_CH01_11, + RTL819x_2GHZ_CH12_13, + RTL819x_2GHZ_CH14, + RTL819x_5GHZ_5725_5850, + } +}; + +static const struct ieee80211_regdomain rtl_regdom_14 = { + .n_reg_rules = 3, + .alpha2 = "99", + .reg_rules = { + RTL819x_2GHZ_CH01_11, + RTL819x_2GHZ_CH12_13, + RTL819x_2GHZ_CH14, + } +}; + +static bool _rtl_is_radar_freq(u16 center_freq) +{ + return center_freq >= 5260 && center_freq <= 5700; +} + +static void _rtl_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; + + 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 (_rtl_is_radar_freq(ch->center_freq) || + (ch->flags & IEEE80211_CHAN_RADAR)) + continue; + if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { + reg_rule = freq_reg_info(wiphy, + ch->center_freq); + if (IS_ERR(reg_rule)) + 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 _rtl_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; + + if (!wiphy->bands[IEEE80211_BAND_2GHZ]) + return; + 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 */ + reg_rule = freq_reg_info(wiphy, ch->center_freq); + if (!IS_ERR(reg_rule)) { + 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 */ + reg_rule = freq_reg_info(wiphy, ch->center_freq); + if (!IS_ERR(reg_rule)) { + 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 _rtl_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 (!_rtl_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 _rtl_reg_apply_world_flags(struct wiphy *wiphy, + enum nl80211_reg_initiator initiator, + struct rtl_regulatory *reg) +{ + _rtl_reg_apply_beaconing_flags(wiphy, initiator); + _rtl_reg_apply_active_scan_flags(wiphy, initiator); + return; +} + +static void _rtl_dump_channel_map(struct wiphy *wiphy) +{ + enum ieee80211_band band; + struct ieee80211_supported_band *sband; + struct ieee80211_channel *ch; + unsigned int i; + + 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]; + } +} + +static int _rtl_reg_notifier_apply(struct wiphy *wiphy, + struct regulatory_request *request, + struct rtl_regulatory *reg) +{ + /* We always apply this */ + _rtl_reg_apply_radar_flags(wiphy); + + 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: + _rtl_reg_apply_world_flags(wiphy, request->initiator, reg); + break; + } + + _rtl_dump_channel_map(wiphy); + + return 0; +} + +static const struct ieee80211_regdomain *_rtl_regdomain_select( + struct rtl_regulatory *reg) +{ + switch (reg->country_code) { + case COUNTRY_CODE_FCC: + return &rtl_regdom_no_midband; + case COUNTRY_CODE_IC: + return &rtl_regdom_11; + case COUNTRY_CODE_ETSI: + case COUNTRY_CODE_TELEC_NETGEAR: + return &rtl_regdom_60_64; + case COUNTRY_CODE_SPAIN: + case COUNTRY_CODE_FRANCE: + case COUNTRY_CODE_ISRAEL: + case COUNTRY_CODE_WORLD_WIDE_13: + return &rtl_regdom_12_13; + case COUNTRY_CODE_MKK: + case COUNTRY_CODE_MKK1: + case COUNTRY_CODE_TELEC: + case COUNTRY_CODE_MIC: + return &rtl_regdom_14_60_64; + case COUNTRY_CODE_GLOBAL_DOMAIN: + return &rtl_regdom_14; + default: + return &rtl_regdom_no_midband; + } +} + +static int _rtl_regd_init_wiphy(struct rtl_regulatory *reg, + struct wiphy *wiphy, + void (*reg_notifier)(struct wiphy *wiphy, + struct regulatory_request * + request)) +{ + const struct ieee80211_regdomain *regd; + + wiphy->reg_notifier = reg_notifier; + + wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; + wiphy->regulatory_flags &= ~REGULATORY_STRICT_REG; + wiphy->regulatory_flags &= ~REGULATORY_DISABLE_BEACON_HINTS; + regd = _rtl_regdomain_select(reg); + wiphy_apply_custom_regulatory(wiphy, regd); + _rtl_reg_apply_radar_flags(wiphy); + _rtl_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg); + return 0; +} + +static struct country_code_to_enum_rd *_rtl_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; +} + +int rtl_regd_init(struct ieee80211_hw *hw, + void (*reg_notifier)(struct wiphy *wiphy, + struct regulatory_request *request)) +{ + struct rtl_priv *rtlpriv = rtl_priv(hw); + struct wiphy *wiphy = hw->wiphy; + struct country_code_to_enum_rd *country = NULL; + + if (wiphy == NULL || &rtlpriv->regd == NULL) + return -EINVAL; + + /* init country_code from efuse channel plan */ + rtlpriv->regd.country_code = rtlpriv->efuse.channel_plan; + + RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE, + "rtl: EEPROM regdomain: 0x%0x\n", + rtlpriv->regd.country_code); + + if (rtlpriv->regd.country_code >= COUNTRY_CODE_MAX) { + RT_TRACE(rtlpriv, COMP_REGD, DBG_DMESG, + "rtl: EEPROM indicates invalid contry code, world wide 13 should be used\n"); + + rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13; + } + + country = _rtl_regd_find_country(rtlpriv->regd.country_code); + + if (country) { + rtlpriv->regd.alpha2[0] = country->iso_name[0]; + rtlpriv->regd.alpha2[1] = country->iso_name[1]; + } else { + rtlpriv->regd.alpha2[0] = '0'; + rtlpriv->regd.alpha2[1] = '0'; + } + + RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE, + "rtl: Country alpha2 being used: %c%c\n", + rtlpriv->regd.alpha2[0], rtlpriv->regd.alpha2[1]); + + _rtl_regd_init_wiphy(&rtlpriv->regd, wiphy, reg_notifier); + + return 0; +} + +void rtl_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) +{ + struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); + struct rtl_priv *rtlpriv = rtl_priv(hw); + + RT_TRACE(rtlpriv, COMP_REGD, DBG_LOUD, "\n"); + + _rtl_reg_notifier_apply(wiphy, request, &rtlpriv->regd); +} -- cgit v1.2.3-54-g00ecf