[deliverable/linux.git] / drivers / net / wireless / ath9k / regd.c

/*
 * Copyright (c) 2008-2009 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include "ath9k.h"
#include "regd_common.h"

/*
 * This is a set of common rules used by our world regulatory domains.
 * We have 12 world regulatory domains. To save space we consolidate
 * the regulatory domains in 5 structures by frequency and change
 * the flags on our reg_notifier() on a case by case basis.
 */

/* Only these channels all allow active scan on all world regulatory domains */
#define ATH9K_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 ATH9K_2GHZ_CH12_13	REG_RULE(2467-10, 2472+10, 40, 0, 20,\
					NL80211_RRF_PASSIVE_SCAN)
#define ATH9K_2GHZ_CH14		REG_RULE(2484-10, 2484+10, 40, 0, 20,\
				NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)

/* We allow IBSS on these on a case by case basis by regulatory domain */
#define ATH9K_5GHZ_5150_5350	REG_RULE(5150-10, 5350+10, 40, 0, 30,\
				NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
#define ATH9K_5GHZ_5470_5850	REG_RULE(5470-10, 5850+10, 40, 0, 30,\
				NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
#define ATH9K_5GHZ_5725_5850	REG_RULE(5725-10, 5850+10, 40, 0, 30,\
				NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)

#define ATH9K_2GHZ_ALL		ATH9K_2GHZ_CH01_11, \
				ATH9K_2GHZ_CH12_13, \
				ATH9K_2GHZ_CH14

#define ATH9K_5GHZ_ALL		ATH9K_5GHZ_5150_5350, \
				ATH9K_5GHZ_5470_5850
/* This one skips what we call "mid band" */
#define ATH9K_5GHZ_NO_MIDBAND	ATH9K_5GHZ_5150_5350, \
				ATH9K_5GHZ_5725_5850

/* Can be used for:
 * 0x60, 0x61, 0x62 */
static const struct ieee80211_regdomain ath9k_world_regdom_60_61_62 = {
	.n_reg_rules = 5,
	.alpha2 =  "99",
	.reg_rules = {
		ATH9K_2GHZ_ALL,
		ATH9K_5GHZ_ALL,
	}
};

/* Can be used by 0x63 and 0x65 */
static const struct ieee80211_regdomain ath9k_world_regdom_63_65 = {
	.n_reg_rules = 4,
	.alpha2 =  "99",
	.reg_rules = {
		ATH9K_2GHZ_CH01_11,
		ATH9K_2GHZ_CH12_13,
		ATH9K_5GHZ_NO_MIDBAND,
	}
};

/* Can be used by 0x64 only */
static const struct ieee80211_regdomain ath9k_world_regdom_64 = {
	.n_reg_rules = 3,
	.alpha2 =  "99",
	.reg_rules = {
		ATH9K_2GHZ_CH01_11,
		ATH9K_5GHZ_NO_MIDBAND,
	}
};

/* Can be used by 0x66 and 0x69 */
static const struct ieee80211_regdomain ath9k_world_regdom_66_69 = {
	.n_reg_rules = 3,
	.alpha2 =  "99",
	.reg_rules = {
		ATH9K_2GHZ_CH01_11,
		ATH9K_5GHZ_ALL,
	}
};

/* Can be used by 0x67, 0x6A and 0x68 */
static const struct ieee80211_regdomain ath9k_world_regdom_67_68_6A = {
	.n_reg_rules = 4,
	.alpha2 =  "99",
	.reg_rules = {
		ATH9K_2GHZ_CH01_11,
		ATH9K_2GHZ_CH12_13,
		ATH9K_5GHZ_ALL,
	}
};

static inline bool is_wwr_sku(u16 regd)
{
	return ((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
		(regd == WORLD);
}

static u16 ath9k_regd_get_eepromRD(struct ath_hw *ah)
{
	return ah->regulatory.current_rd & ~WORLDWIDE_ROAMING_FLAG;
}

bool ath9k_is_world_regd(struct ath_hw *ah)
{
	return is_wwr_sku(ath9k_regd_get_eepromRD(ah));
}

const struct ieee80211_regdomain *ath9k_default_world_regdomain(void)
{
	/* this is the most restrictive */
	return &ath9k_world_regdom_64;
}

const struct ieee80211_regdomain *ath9k_world_regdomain(struct ath_hw *ah)
{
	switch (ah->regulatory.regpair->regDmnEnum) {
	case 0x60:
	case 0x61:
	case 0x62:
		return &ath9k_world_regdom_60_61_62;
	case 0x63:
	case 0x65:
		return &ath9k_world_regdom_63_65;
	case 0x64:
		return &ath9k_world_regdom_64;
	case 0x66:
	case 0x69:
		return &ath9k_world_regdom_66_69;
	case 0x67:
	case 0x68:
	case 0x6A:
		return &ath9k_world_regdom_67_68_6A;
	default:
		WARN_ON(1);
		return ath9k_default_world_regdomain();
	}
}

/* Frequency is one where radar detection is required */
static bool ath9k_is_radar_freq(u16 center_freq)
{
	return (center_freq >= 5260 && center_freq <= 5700);
}

/*
 * N.B: These exception rules do not apply radar freqs.
 *
 * - We enable adhoc (or beaconing) if allowed by 11d
 * - We enable active scan if the channel is allowed by 11d
 * - If no country IE has been processed and a we determine we have
 *   received a beacon on a channel we can enable active scan and
 *   adhoc (or beaconing).
 */
static void ath9k_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 (ath9k_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 ath9k_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 */
void ath9k_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 (!ath9k_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;
	}
}

void ath9k_reg_apply_world_flags(struct wiphy *wiphy,
				 enum nl80211_reg_initiator initiator)
{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct ath_wiphy *aphy = hw->priv;
	struct ath_softc *sc = aphy->sc;
	struct ath_hw *ah = sc->sc_ah;

	switch (ah->regulatory.regpair->regDmnEnum) {
	case 0x60:
	case 0x63:
	case 0x66:
	case 0x67:
		ath9k_reg_apply_beaconing_flags(wiphy, initiator);
		break;
	case 0x68:
		ath9k_reg_apply_beaconing_flags(wiphy, initiator);
		ath9k_reg_apply_active_scan_flags(wiphy, initiator);
		break;
	}
	return;
}

int ath9k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct ath_wiphy *aphy = hw->priv;
	struct ath_softc *sc = aphy->sc;

	/* We always apply this */
	ath9k_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:
		if (ath9k_is_world_regd(sc->sc_ah))
			ath9k_reg_apply_world_flags(wiphy, request->initiator);
		break;
	}

	return 0;
}

bool ath9k_regd_is_eeprom_valid(struct ath_hw *ah)
{
	u16 rd = ath9k_regd_get_eepromRD(ah);
	int i;

	if (rd & COUNTRY_ERD_FLAG) {
		/* EEPROM value is a country code */
		u16 cc = rd & ~COUNTRY_ERD_FLAG;
		for (i = 0; i < ARRAY_SIZE(allCountries); i++)
			if (allCountries[i].countryCode == cc)
				return true;
	} else {
		/* EEPROM value is a regpair value */
		for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
			if (regDomainPairs[i].regDmnEnum == rd)
				return true;
	}
	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
		 "invalid regulatory domain/country code 0x%x\n", rd);
	return false;
}

/* EEPROM country code to regpair mapping */
static struct country_code_to_enum_rd*
ath9k_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;
}

/* EEPROM rd code to regpair mapping */
static struct country_code_to_enum_rd*
ath9k_regd_find_country_by_rd(int regdmn)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
		if (allCountries[i].regDmnEnum == regdmn)
			return &allCountries[i];
	}
	return NULL;
}

/* Returns the map of the EEPROM set RD to a country code */
static u16 ath9k_regd_get_default_country(u16 rd)
{
	if (rd & COUNTRY_ERD_FLAG) {
		struct country_code_to_enum_rd *country = NULL;
		u16 cc = rd & ~COUNTRY_ERD_FLAG;

		country = ath9k_regd_find_country(cc);
		if (country != NULL)
			return cc;
	}

	return CTRY_DEFAULT;
}

static struct reg_dmn_pair_mapping*
ath9k_get_regpair(int regdmn)
{
	int i;

	if (regdmn == NO_ENUMRD)
		return NULL;
	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
		if (regDomainPairs[i].regDmnEnum == regdmn)
			return &regDomainPairs[i];
	}
	return NULL;
}

int ath9k_regd_init(struct ath_hw *ah)
{
	struct country_code_to_enum_rd *country = NULL;
	u16 regdmn;

	if (!ath9k_regd_is_eeprom_valid(ah)) {
		DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
			"Invalid EEPROM contents\n");
		return -EINVAL;
	}

	regdmn = ath9k_regd_get_eepromRD(ah);
	ah->regulatory.country_code = ath9k_regd_get_default_country(regdmn);

	if (ah->regulatory.country_code == CTRY_DEFAULT &&
	    regdmn == CTRY_DEFAULT)
		ah->regulatory.country_code = CTRY_UNITED_STATES;

	if (ah->regulatory.country_code == CTRY_DEFAULT) {
		country = NULL;
	} else {
		country = ath9k_regd_find_country(ah->regulatory.country_code);
		if (country == NULL) {
			DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
				"Country is NULL!!!!, cc= %d\n",
				ah->regulatory.country_code);
			return -EINVAL;
		} else
			regdmn = country->regDmnEnum;
	}

	ah->regulatory.regpair = ath9k_get_regpair(regdmn);

	if (!ah->regulatory.regpair) {
		DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
			"No regulatory domain pair found, cannot continue\n");
		return -EINVAL;
	}

	if (!country)
		country = ath9k_regd_find_country_by_rd(regdmn);

	if (country) {
		ah->regulatory.alpha2[0] = country->isoName[0];
		ah->regulatory.alpha2[1] = country->isoName[1];
	} else {
		ah->regulatory.alpha2[0] = '0';
		ah->regulatory.alpha2[1] = '0';
	}

	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
		"Country alpha2 being used: %c%c\n"
		"Regulatory.Regpair detected: 0x%0x\n",
		ah->regulatory.alpha2[0], ah->regulatory.alpha2[1],
		ah->regulatory.regpair->regDmnEnum);

	return 0;
}

u32 ath9k_regd_get_ctl(struct ath_hw *ah, struct ath9k_channel *chan)
{
	u32 ctl = NO_CTL;

	if (!ah->regulatory.regpair ||
	    (ah->regulatory.country_code == CTRY_DEFAULT &&
	     is_wwr_sku(ath9k_regd_get_eepromRD(ah)))) {
		if (IS_CHAN_B(chan))
			ctl = SD_NO_CTL | CTL_11B;
		else if (IS_CHAN_G(chan))
			ctl = SD_NO_CTL | CTL_11G;
		else
			ctl = SD_NO_CTL | CTL_11A;
		return ctl;
	}

	if (IS_CHAN_B(chan))
		ctl = ah->regulatory.regpair->reg_2ghz_ctl | CTL_11B;
	else if (IS_CHAN_G(chan))
		ctl = ah->regulatory.regpair->reg_2ghz_ctl | CTL_11G;
	else
		ctl = ah->regulatory.regpair->reg_5ghz_ctl | CTL_11A;

	return ctl;
}
Commit	Line	Data
f078f209	1	/*
cee075a2	2	* Copyright (c) 2008-2009 Atheros Communications Inc.
f078f209 LR	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/slab.h>
394cf0a1	19	#include "ath9k.h"
f078f209 LR	20	#include "regd_common.h"
f078f209 LR	21
5f8e077c LR	22	/*
	23	* This is a set of common rules used by our world regulatory domains.
	24	* We have 12 world regulatory domains. To save space we consolidate
	25	* the regulatory domains in 5 structures by frequency and change
	26	* the flags on our reg_notifier() on a case by case basis.
	27	*/
f078f209	28
5f8e077c LR	29	/* Only these channels all allow active scan on all world regulatory domains */
	30	#define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
	31
	32	/* We enable active scan on these a case by case basis by regulatory domain */
	33	#define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
	34	NL80211_RRF_PASSIVE_SCAN)
	35	#define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
	36	NL80211_RRF_PASSIVE_SCAN \| NL80211_RRF_NO_OFDM)
	37
	38	/* We allow IBSS on these on a case by case basis by regulatory domain */
	39	#define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
	40	NL80211_RRF_PASSIVE_SCAN \| NL80211_RRF_NO_IBSS)
	41	#define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
	42	NL80211_RRF_PASSIVE_SCAN \| NL80211_RRF_NO_IBSS)
	43	#define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
	44	NL80211_RRF_PASSIVE_SCAN \| NL80211_RRF_NO_IBSS)
	45
	46	#define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
	47	ATH9K_2GHZ_CH12_13, \
	48	ATH9K_2GHZ_CH14
	49
	50	#define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
	51	ATH9K_5GHZ_5470_5850
	52	/* This one skips what we call "mid band" */
	53	#define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
	54	ATH9K_5GHZ_5725_5850
	55
	56	/* Can be used for:
	57	* 0x60, 0x61, 0x62 */
	58	static const struct ieee80211_regdomain ath9k_world_regdom_60_61_62 = {
	59	.n_reg_rules = 5,
	60	.alpha2 = "99",
	61	.reg_rules = {
	62	ATH9K_2GHZ_ALL,
	63	ATH9K_5GHZ_ALL,
	64	}
	65	};
	66
	67	/* Can be used by 0x63 and 0x65 */
	68	static const struct ieee80211_regdomain ath9k_world_regdom_63_65 = {
	69	.n_reg_rules = 4,
	70	.alpha2 = "99",
	71	.reg_rules = {
	72	ATH9K_2GHZ_CH01_11,
	73	ATH9K_2GHZ_CH12_13,
	74	ATH9K_5GHZ_NO_MIDBAND,
	75	}
	76	};
	77
	78	/* Can be used by 0x64 only */
	79	static const struct ieee80211_regdomain ath9k_world_regdom_64 = {
	80	.n_reg_rules = 3,
	81	.alpha2 = "99",
	82	.reg_rules = {
	83	ATH9K_2GHZ_CH01_11,
	84	ATH9K_5GHZ_NO_MIDBAND,
	85	}
	86	};
	87
	88	/* Can be used by 0x66 and 0x69 */
	89	static const struct ieee80211_regdomain ath9k_world_regdom_66_69 = {
	90	.n_reg_rules = 3,
	91	.alpha2 = "99",
	92	.reg_rules = {
93	ATH9K_2GHZ_CH01_11,
94	ATH9K_5GHZ_ALL,
95	}
96	};
97
98	/* Can be used by 0x67, 0x6A and 0x68 */
99	static const struct ieee80211_regdomain ath9k_world_regdom_67_68_6A = {
100	.n_reg_rules = 4,
101	.alpha2 = "99",
102	.reg_rules = {
103	ATH9K_2GHZ_CH01_11,
104	ATH9K_2GHZ_CH12_13,
105	ATH9K_5GHZ_ALL,
106	}
107	};
f078f209	108
d0f48f9d BC	109	static inline bool is_wwr_sku(u16 regd)
	110	{
	111	return ((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) \|\|
	112	(regd == WORLD);
	113	}
	114
cbe61d8a	115	static u16 ath9k_regd_get_eepromRD(struct ath_hw *ah)
f078f209	116	{
d6bad496	117	return ah->regulatory.current_rd & ~WORLDWIDE_ROAMING_FLAG;
f078f209 LR	118	}
f078f209 LR	119
cbe61d8a	120	bool ath9k_is_world_regd(struct ath_hw *ah)
5f8e077c	121	{
d0f48f9d	122	return is_wwr_sku(ath9k_regd_get_eepromRD(ah));
f078f209 LR	123	}
f078f209 LR	124
5f8e077c	125	const struct ieee80211_regdomain *ath9k_default_world_regdomain(void)
f078f209	126	{
5f8e077c LR	127	/* this is the most restrictive */
	128	return &ath9k_world_regdom_64;
	129	}
f078f209	130
cbe61d8a	131	const struct ieee80211_regdomain ath9k_world_regdomain(struct ath_hw ah)
5f8e077c	132	{
d6bad496	133	switch (ah->regulatory.regpair->regDmnEnum) {
5f8e077c LR	134	case 0x60:
	135	case 0x61:
	136	case 0x62:
	137	return &ath9k_world_regdom_60_61_62;
	138	case 0x63:
	139	case 0x65:
	140	return &ath9k_world_regdom_63_65;
	141	case 0x64:
	142	return &ath9k_world_regdom_64;
	143	case 0x66:
	144	case 0x69:
	145	return &ath9k_world_regdom_66_69;
	146	case 0x67:
	147	case 0x68:
	148	case 0x6A:
	149	return &ath9k_world_regdom_67_68_6A;
	150	default:
	151	WARN_ON(1);
	152	return ath9k_default_world_regdomain();
f078f209	153	}
f078f209 LR	154	}
f078f209 LR	155
547e4c2e LR	156	/* Frequency is one where radar detection is required */
	157	static bool ath9k_is_radar_freq(u16 center_freq)
	158	{
	159	return (center_freq >= 5260 && center_freq <= 5700);
	160	}
	161
7519a8f0	162	/*
84540869 LR	163	* N.B: These exception rules do not apply radar freqs.
	164	*
	165	* - We enable adhoc (or beaconing) if allowed by 11d
	166	* - We enable active scan if the channel is allowed by 11d
	167	* - If no country IE has been processed and a we determine we have
	168	* received a beacon on a channel we can enable active scan and
	169	* adhoc (or beaconing).
7519a8f0	170	*/
7db90f4a LR	171	static void ath9k_reg_apply_beaconing_flags(
	172	struct wiphy *wiphy,
	173	enum nl80211_reg_initiator initiator)
f078f209	174	{
84540869	175	enum ieee80211_band band;
5f8e077c LR	176	struct ieee80211_supported_band *sband;
	177	const struct ieee80211_reg_rule *reg_rule;
	178	struct ieee80211_channel *ch;
	179	unsigned int i;
	180	u32 bandwidth = 0;
	181	int r;
	182
84540869	183	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
f078f209	184
84540869	185	if (!wiphy->bands[band])
5f8e077c	186	continue;
84540869 LR	187
	188	sband = wiphy->bands[band];
	189
	190	for (i = 0; i < sband->n_channels; i++) {
	191
	192	ch = &sband->channels[i];
	193
	194	if (ath9k_is_radar_freq(ch->center_freq) \|\|
	195	(ch->flags & IEEE80211_CHAN_RADAR))
	196	continue;
	197
7db90f4a	198	if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
84540869 LR	199	r = freq_reg_info(wiphy, ch->center_freq,
	200	&bandwidth, &reg_rule);
	201	if (r)
	202	continue;
	203	/*
	204	* If 11d had a rule for this channel ensure
	205	* we enable adhoc/beaconing if it allows us to
	206	* use it. Note that we would have disabled it
	207	* by applying our static world regdomain by
	208	* default during init, prior to calling our
	209	* regulatory_hint().
	210	*/
	211	if (!(reg_rule->flags &
	212	NL80211_RRF_NO_IBSS))
	213	ch->flags &=
	214	~IEEE80211_CHAN_NO_IBSS;
	215	if (!(reg_rule->flags &
	216	NL80211_RRF_PASSIVE_SCAN))
	217	ch->flags &=
	218	~IEEE80211_CHAN_PASSIVE_SCAN;
	219	} else {
	220	if (ch->beacon_found)
	221	ch->flags &= ~(IEEE80211_CHAN_NO_IBSS \|
	222	IEEE80211_CHAN_PASSIVE_SCAN);
	223	}
	224	}
5f8e077c	225	}
84540869	226
f078f209 LR	227	}
f078f209 LR	228
5f8e077c	229	/* Allows active scan scan on Ch 12 and 13 */
7db90f4a LR	230	static void ath9k_reg_apply_active_scan_flags(
	231	struct wiphy *wiphy,
	232	enum nl80211_reg_initiator initiator)
f078f209	233	{
5f8e077c LR	234	struct ieee80211_supported_band *sband;
	235	struct ieee80211_channel *ch;
	236	const struct ieee80211_reg_rule *reg_rule;
	237	u32 bandwidth = 0;
	238	int r;
	239
5f8e077c LR	240	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
5f8e077c LR	241
84540869 LR	242	/*
	243	* If no country IE has been received always enable active scan
	244	* on these channels. This is only done for specific regulatory SKUs
	245	*/
7db90f4a	246	if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
5f8e077c LR	247	ch = &sband->channels[11]; /* CH 12 */
	248	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	249	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
	250	ch = &sband->channels[12]; /* CH 13 */
	251	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	252	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
	253	return;
	254	}
f078f209	255
84540869 LR	256	/*
84540869 LR	257	* If a country IE has been recieved check its rule for this
5f8e077c	258	* channel first before enabling active scan. The passive scan
84540869 LR	259	* would have been enforced by the initial processing of our
	260	* custom regulatory domain.
	261	*/
f078f209	262
5f8e077c LR	263	ch = &sband->channels[11]; /* CH 12 */
	264	r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, &reg_rule);
	265	if (!r) {
	266	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
	267	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	268	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
f078f209 LR	269	}
f078f209 LR	270
5f8e077c LR	271	ch = &sband->channels[12]; /* CH 13 */
	272	r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, &reg_rule);
	273	if (!r) {
	274	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
	275	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	276	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
f078f209	277	}
f078f209 LR	278	}
f078f209 LR	279
5f8e077c LR	280	/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
5f8e077c LR	281	void ath9k_reg_apply_radar_flags(struct wiphy *wiphy)
f078f209	282	{
5f8e077c LR	283	struct ieee80211_supported_band *sband;
	284	struct ieee80211_channel *ch;
	285	unsigned int i;
f078f209	286
5f8e077c LR	287	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
5f8e077c LR	288	return;
f078f209	289
5f8e077c	290	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
f078f209	291
5f8e077c LR	292	for (i = 0; i < sband->n_channels; i++) {
5f8e077c LR	293	ch = &sband->channels[i];
547e4c2e	294	if (!ath9k_is_radar_freq(ch->center_freq))
5f8e077c LR	295	continue;
	296	/* We always enable radar detection/DFS on this
	297	* frequency range. Additionally we also apply on
	298	* this frequency range:
	299	* - If STA mode does not yet have DFS supports disable
	300	* active scanning
	301	* - If adhoc mode does not support DFS yet then
	302	* disable adhoc in the frequency.
	303	* - If AP mode does not yet support radar detection/DFS
	304	* do not allow AP mode
	305	*/
	306	if (!(ch->flags & IEEE80211_CHAN_DISABLED))
	307	ch->flags \|= IEEE80211_CHAN_RADAR \|
	308	IEEE80211_CHAN_NO_IBSS \|
	309	IEEE80211_CHAN_PASSIVE_SCAN;
	310	}
	311	}
f078f209	312
7db90f4a LR	313	void ath9k_reg_apply_world_flags(struct wiphy *wiphy,
7db90f4a LR	314	enum nl80211_reg_initiator initiator)
5f8e077c LR	315	{
5f8e077c LR	316	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
bce048d7 JM	317	struct ath_wiphy *aphy = hw->priv;
bce048d7 JM	318	struct ath_softc *sc = aphy->sc;
cbe61d8a	319	struct ath_hw *ah = sc->sc_ah;
5f8e077c	320
d6bad496	321	switch (ah->regulatory.regpair->regDmnEnum) {
5f8e077c LR	322	case 0x60:
	323	case 0x63:
	324	case 0x66:
	325	case 0x67:
7db90f4a	326	ath9k_reg_apply_beaconing_flags(wiphy, initiator);
5f8e077c LR	327	break;
5f8e077c LR	328	case 0x68:
7db90f4a LR	329	ath9k_reg_apply_beaconing_flags(wiphy, initiator);
7db90f4a LR	330	ath9k_reg_apply_active_scan_flags(wiphy, initiator);
5f8e077c LR	331	break;
	332	}
	333	return;
	334	}
f078f209	335
5f8e077c LR	336	int ath9k_reg_notifier(struct wiphy wiphy, struct regulatory_request request)
	337	{
	338	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
bce048d7 JM	339	struct ath_wiphy *aphy = hw->priv;
bce048d7 JM	340	struct ath_softc *sc = aphy->sc;
f078f209	341
5f8e077c LR	342	/* We always apply this */
5f8e077c LR	343	ath9k_reg_apply_radar_flags(wiphy);
f078f209	344
5f8e077c	345	switch (request->initiator) {
7db90f4a LR	346	case NL80211_REGDOM_SET_BY_DRIVER:
	347	case NL80211_REGDOM_SET_BY_CORE:
	348	case NL80211_REGDOM_SET_BY_USER:
5f8e077c	349	break;
7db90f4a	350	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
5f8e077c LR	351	if (ath9k_is_world_regd(sc->sc_ah))
	352	ath9k_reg_apply_world_flags(wiphy, request->initiator);
	353	break;
	354	}
f078f209	355
5f8e077c	356	return 0;
f078f209 LR	357	}
f078f209 LR	358
cbe61d8a	359	bool ath9k_regd_is_eeprom_valid(struct ath_hw *ah)
f078f209	360	{
5f8e077c LR	361	u16 rd = ath9k_regd_get_eepromRD(ah);
5f8e077c LR	362	int i;
f078f209	363
5f8e077c LR	364	if (rd & COUNTRY_ERD_FLAG) {
	365	/* EEPROM value is a country code */
	366	u16 cc = rd & ~COUNTRY_ERD_FLAG;
	367	for (i = 0; i < ARRAY_SIZE(allCountries); i++)
	368	if (allCountries[i].countryCode == cc)
	369	return true;
	370	} else {
	371	/* EEPROM value is a regpair value */
	372	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
	373	if (regDomainPairs[i].regDmnEnum == rd)
	374	return true;
f078f209	375	}
5f8e077c LR	376	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
5f8e077c LR	377	"invalid regulatory domain/country code 0x%x\n", rd);
f078f209 LR	378	return false;
	379	}
	380
5f8e077c	381	/* EEPROM country code to regpair mapping */
f078f209 LR	382	static struct country_code_to_enum_rd*
	383	ath9k_regd_find_country(u16 countryCode)
	384	{
	385	int i;
	386
	387	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
	388	if (allCountries[i].countryCode == countryCode)
	389	return &allCountries[i];
	390	}
	391	return NULL;
	392	}
	393
5f8e077c LR	394	/* EEPROM rd code to regpair mapping */
	395	static struct country_code_to_enum_rd*
	396	ath9k_regd_find_country_by_rd(int regdmn)
	397	{
	398	int i;
	399
	400	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
	401	if (allCountries[i].regDmnEnum == regdmn)
	402	return &allCountries[i];
	403	}
	404	return NULL;
	405	}
	406
	407	/* Returns the map of the EEPROM set RD to a country code */
e775aaf0	408	static u16 ath9k_regd_get_default_country(u16 rd)
f078f209	409	{
f078f209 LR	410	if (rd & COUNTRY_ERD_FLAG) {
	411	struct country_code_to_enum_rd *country = NULL;
	412	u16 cc = rd & ~COUNTRY_ERD_FLAG;
	413
	414	country = ath9k_regd_find_country(cc);
	415	if (country != NULL)
	416	return cc;
	417	}
	418
f078f209 LR	419	return CTRY_DEFAULT;
	420	}
	421
5f8e077c LR	422	static struct reg_dmn_pair_mapping*
5f8e077c LR	423	ath9k_get_regpair(int regdmn)
f078f209 LR	424	{
	425	int i;
	426
5f8e077c LR	427	if (regdmn == NO_ENUMRD)
5f8e077c LR	428	return NULL;
f078f209	429	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
5f8e077c LR	430	if (regDomainPairs[i].regDmnEnum == regdmn)
5f8e077c LR	431	return &regDomainPairs[i];
f078f209	432	}
5f8e077c	433	return NULL;
f078f209 LR	434	}
f078f209 LR	435
cbe61d8a	436	int ath9k_regd_init(struct ath_hw *ah)
f078f209	437	{
f078f209	438	struct country_code_to_enum_rd *country = NULL;
e775aaf0	439	u16 regdmn;
f078f209 LR	440
	441	if (!ath9k_regd_is_eeprom_valid(ah)) {
	442	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
04bd4638	443	"Invalid EEPROM contents\n");
5f8e077c	444	return -EINVAL;
f078f209 LR	445	}
f078f209 LR	446
e775aaf0 BC	447	regdmn = ath9k_regd_get_eepromRD(ah);
e775aaf0 BC	448	ah->regulatory.country_code = ath9k_regd_get_default_country(regdmn);
f078f209	449
d6bad496	450	if (ah->regulatory.country_code == CTRY_DEFAULT &&
e775aaf0	451	regdmn == CTRY_DEFAULT)
d6bad496	452	ah->regulatory.country_code = CTRY_UNITED_STATES;
f078f209	453
d6bad496	454	if (ah->regulatory.country_code == CTRY_DEFAULT) {
f078f209 LR	455	country = NULL;
f078f209 LR	456	} else {
d6bad496	457	country = ath9k_regd_find_country(ah->regulatory.country_code);
f078f209 LR	458	if (country == NULL) {
	459	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
	460	"Country is NULL!!!!, cc= %d\n",
d6bad496	461	ah->regulatory.country_code);
5f8e077c LR	462	return -EINVAL;
5f8e077c LR	463	} else
f078f209	464	regdmn = country->regDmnEnum;
f078f209 LR	465	}
f078f209 LR	466
d6bad496	467	ah->regulatory.regpair = ath9k_get_regpair(regdmn);
f078f209	468
d6bad496	469	if (!ah->regulatory.regpair) {
5f8e077c LR	470	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	471	"No regulatory domain pair found, cannot continue\n");
	472	return -EINVAL;
f078f209	473	}
f078f209	474
5f8e077c LR	475	if (!country)
5f8e077c LR	476	country = ath9k_regd_find_country_by_rd(regdmn);
f078f209	477
5f8e077c	478	if (country) {
d6bad496 S	479	ah->regulatory.alpha2[0] = country->isoName[0];
d6bad496 S	480	ah->regulatory.alpha2[1] = country->isoName[1];
f078f209	481	} else {
d6bad496 S	482	ah->regulatory.alpha2[0] = '0';
d6bad496 S	483	ah->regulatory.alpha2[1] = '0';
f078f209 LR	484	}
f078f209 LR	485
f078f209	486	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
0c6666e4	487	"Country alpha2 being used: %c%c\n"
d6bad496 S	488	"Regulatory.Regpair detected: 0x%0x\n",
	489	ah->regulatory.alpha2[0], ah->regulatory.alpha2[1],
	490	ah->regulatory.regpair->regDmnEnum);
f078f209	491
5f8e077c	492	return 0;
f078f209 LR	493	}
f078f209 LR	494
cbe61d8a	495	u32 ath9k_regd_get_ctl(struct ath_hw ah, struct ath9k_channel chan)
f078f209 LR	496	{
f078f209 LR	497	u32 ctl = NO_CTL;
f078f209	498
d6bad496	499	if (!ah->regulatory.regpair \|\|
d0f48f9d BC	500	(ah->regulatory.country_code == CTRY_DEFAULT &&
d0f48f9d BC	501	is_wwr_sku(ath9k_regd_get_eepromRD(ah)))) {
f078f209 LR	502	if (IS_CHAN_B(chan))
	503	ctl = SD_NO_CTL \| CTL_11B;
	504	else if (IS_CHAN_G(chan))
	505	ctl = SD_NO_CTL \| CTL_11G;
	506	else
	507	ctl = SD_NO_CTL \| CTL_11A;
5f8e077c	508	return ctl;
f078f209	509	}
f078f209	510
5f8e077c	511	if (IS_CHAN_B(chan))
d6bad496	512	ctl = ah->regulatory.regpair->reg_2ghz_ctl \| CTL_11B;
5f8e077c	513	else if (IS_CHAN_G(chan))
204b190c	514	ctl = ah->regulatory.regpair->reg_2ghz_ctl \| CTL_11G;
5f8e077c	515	else
d6bad496	516	ctl = ah->regulatory.regpair->reg_5ghz_ctl \| CTL_11A;
f078f209	517
5f8e077c	518	return ctl;
f078f209	519	}