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linux/drivers/net/wireless/rtlwifi/regd.c
Luis R. Rodriguez 0c0280bd0b wireless: make the reg_notifier() void 
The reg_notifier()'s return value need not be checked
as it is only supposed to do post regulatory work and
that should never fail. Any behaviour to regulatory
that needs to be considered before cfg80211 does work
to a driver should be specified by using the already
existing flags, the reg_notifier() just does post
processing should it find it needs to.

Also make lbs_reg_notifier static.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
[move lbs_reg_notifier to not break compile]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-14 11:32:44 +01:00

431 lines
12 KiB
C
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/******************************************************************************
*
* 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.
*
* 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)
/* 5G chan 36 - chan 64*/
#define RTL819x_5GHZ_5150_5350 \
REG_RULE(5150-10, 5350+10, 40, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | \
NL80211_RRF_NO_IBSS)
/* 5G chan 100 - chan 165*/
#define RTL819x_5GHZ_5470_5850 \
REG_RULE(5470-10, 5850+10, 40, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | \
NL80211_RRF_NO_IBSS)
/* 5G chan 149 - chan 165*/
#define RTL819x_5GHZ_5725_5850 \
REG_RULE(5725-10, 5850+10, 40, 0, 30, \
NL80211_RRF_PASSIVE_SCAN | \
NL80211_RRF_NO_IBSS)
#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 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 */
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_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;
}
}
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->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,
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);
}
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