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path: root/drivers/net/wireless/rtlwifi/regd.c
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Diffstat (limited to 'drivers/net/wireless/rtlwifi/regd.c')
-rw-r--r--drivers/net/wireless/rtlwifi/regd.c400
1 files changed, 400 insertions, 0 deletions
diff --git a/drivers/net/wireless/rtlwifi/regd.c b/drivers/net/wireless/rtlwifi/regd.c
new file mode 100644
index 000000000000..3336ca999dfd
--- /dev/null
+++ b/drivers/net/wireless/rtlwifi/regd.c
@@ -0,0 +1,400 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2009-2010 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * wlanfae <wlanfae@realtek.com>
+ * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
+ * Hsinchu 300, Taiwan.
+ *
+ * Larry Finger <Larry.Finger@lwfinger.net>
+ *
+ *****************************************************************************/
+
+#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)
+
+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_global = {
+ .n_reg_rules = 3,
+ .alpha2 = "99",
+ .reg_rules = {
+ RTL819x_2GHZ_CH01_11,
+ RTL819x_2GHZ_CH12_13,
+ RTL819x_2GHZ_CH14,
+ }
+};
+
+static const struct ieee80211_regdomain rtl_regdom_world = {
+ .n_reg_rules = 2,
+ .alpha2 = "99",
+ .reg_rules = {
+ RTL819x_2GHZ_CH01_11,
+ RTL819x_2GHZ_CH12_13,
+ }
+};
+
+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;
+ 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 (_rtl_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, &reg_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 _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;
+ 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, &reg_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, &reg_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 _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:
+ case COUNTRY_CODE_IC:
+ return &rtl_regdom_11;
+ case COUNTRY_CODE_ETSI:
+ case COUNTRY_CODE_SPAIN:
+ case COUNTRY_CODE_FRANCE:
+ case COUNTRY_CODE_ISRAEL:
+ case COUNTRY_CODE_TELEC_NETGEAR:
+ return &rtl_regdom_world;
+ case COUNTRY_CODE_MKK:
+ case COUNTRY_CODE_MKK1:
+ case COUNTRY_CODE_TELEC:
+ case COUNTRY_CODE_MIC:
+ return &rtl_regdom_global;
+ case COUNTRY_CODE_GLOBAL_DOMAIN:
+ return &rtl_regdom_global;
+ case COUNTRY_CODE_WORLD_WIDE_13:
+ return &rtl_regdom_world;
+ default:
+ return &rtl_regdom_world;
+ }
+}
+
+static int _rtl_regd_init_wiphy(struct rtl_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_CUSTOM_REGULATORY;
+ wiphy->flags &= ~WIPHY_FLAG_STRICT_REGULATORY;
+ wiphy->flags &= ~WIPHY_FLAG_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,
+ int (*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;
+
+ /* force the channel plan to world wide 13 */
+ rtlpriv->regd.country_code = COUNTRY_CODE_WORLD_WIDE_13;
+
+ RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE,
+ (KERN_DEBUG "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,
+ (KERN_DEBUG "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->isoName[0];
+ rtlpriv->regd.alpha2[1] = country->isoName[1];
+ } else {
+ rtlpriv->regd.alpha2[0] = '0';
+ rtlpriv->regd.alpha2[1] = '0';
+ }
+
+ RT_TRACE(rtlpriv, COMP_REGD, DBG_TRACE,
+ (KERN_DEBUG "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;
+}
+
+int 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"));
+
+ return _rtl_reg_notifier_apply(wiphy, request, &rtlpriv->regd);
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-25 06:32:46 +0300