cregit-Linux how code gets into the kernel

Release 4.7 drivers/net/wireless/realtek/rtlwifi/regd.c

Directory: drivers/net/wireless/realtek/rtlwifi
/******************************************************************************
 *
 * 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 <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"},
	{COUNTRY_CODE_WORLD_WIDE_13_5G_ALL, "US"},
};

/*
 *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_12_13_5g_all = {
	.n_reg_rules = 4,
	.alpha2 = "99",
	.reg_rules = {
			RTL819x_2GHZ_CH01_11,
			RTL819x_2GHZ_CH12_13,
			RTL819x_5GHZ_5150_5350,
			RTL819x_5GHZ_5470_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;
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger18100.00%1100.00%


Total18100.00%1100.00%






static void _rtl_reg_apply_beaconing_flags(struct wiphy *wiphy,
					   enum nl80211_reg_initiator initiator)
{
	enum nl80211_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 < NUM_NL80211_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);
			}
		}
	}
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger19696.55%250.00%


johannes bergjohannes berg73.45%250.00%


Total203100.00%4100.00%



/* 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[NL80211_BAND_2GHZ])
		return;
	sband = wiphy->bands[NL80211_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;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger20890.43%240.00%


johannes bergjohannes berg125.22%240.00%


chaoming lichaoming li104.35%120.00%


Total230100.00%5100.00%



/*
 *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[NL80211_BAND_5GHZ])
		return;

	sband = wiphy->bands[NL80211_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;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger10398.10%266.67%


johannes bergjohannes berg21.90%133.33%


Total105100.00%3100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger35100.00%1100.00%


Total35100.00%1100.00%






static void _rtl_dump_channel_map(struct wiphy *wiphy)
{
	enum nl80211_band band;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	unsigned int i;

	for (band = 0; band < NUM_NL80211_BANDS; band++) {
		if (!wiphy->bands[band])
			continue;
		sband = wiphy->bands[band];
		for (i = 0; i < sband->n_channels; i++)
			ch = &sband->channels[i];
	}
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger8696.63%250.00%


johannes bergjohannes berg22.25%125.00%


luis r. rodriguezluis r. rodriguez11.12%125.00%


Total89100.00%4100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger68100.00%2100.00%


Total68100.00%2100.00%






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:
		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;
	case COUNTRY_CODE_WORLD_WIDE_13:
	case COUNTRY_CODE_WORLD_WIDE_13_5G_ALL:
		return &rtl_regdom_12_13_5g_all;
	default:
		return &rtl_regdom_no_midband;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger7577.32%250.00%


chaoming lichaoming li1515.46%125.00%


shao fushao fu77.22%125.00%


Total97100.00%4100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger8992.71%133.33%


luis r. rodriguezluis r. rodriguez77.29%266.67%


Total96100.00%3100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger53100.00%1100.00%


Total53100.00%1100.00%






static u8 channel_plan_to_country_code(u8 channelplan)
{
	switch (channelplan) {
	case 0x20:
	case 0x21:
		return COUNTRY_CODE_WORLD_WIDE_13;
	case 0x22:
		return COUNTRY_CODE_IC;
	case 0x32:
		return COUNTRY_CODE_TELEC_NETGEAR;
	case 0x41:
		return COUNTRY_CODE_GLOBAL_DOMAIN;
	case 0x7f:
		return COUNTRY_CODE_WORLD_WIDE_13_5G_ALL;
	default:
		return COUNTRY_CODE_MAX; /*Error*/
	}
}


Contributors
PersonTokensPropCommitsCommitProp
shao fushao fu53100.00%1100.00%


Total53100.00%1100.00%






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 =
		channel_plan_to_country_code(rtlpriv->efuse.channel_plan);

	RT_TRACE(rtlpriv, COMP_REGD, DBG_DMESG,
		 "rtl: EEPROM regdomain: 0x%0x conuntry code: %d\n",
		 rtlpriv->efuse.channel_plan, 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;
}


Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger23490.70%120.00%


shao fushao fu114.26%120.00%


chaoming lichaoming li83.10%120.00%


joe perchesjoe perches41.55%120.00%


luis r. rodriguezluis r. rodriguez10.39%120.00%


Total258100.00%5100.00%






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);
}

Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger5696.55%150.00%


luis r. rodriguezluis r. rodriguez23.45%150.00%


Total58100.00%2100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
larry fingerlarry finger141182.76%330.00%


chaoming lichaoming li1488.68%110.00%


shao fushao fu1086.33%110.00%


johannes bergjohannes berg231.35%220.00%


luis r. rodriguezluis r. rodriguez110.65%220.00%


joe perchesjoe perches40.23%110.00%


Total1705100.00%10100.00%

  
Directory: drivers/net/wireless/realtek/rtlwifi



Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
{% endraw %}