/******************************************************************************
*
* 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, ®_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 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 _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);
}