rtl8192ce: Add new driver

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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 00000000000..3336ca999df
--- /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);
+}