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

/*
 * Copyright (c) 2008 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 u16 ath9k_regd_get_eepromRD(struct ath_hal *ah)
{
	return ah->ah_currentRD & ~WORLDWIDE_ROAMING_FLAG;
}

u16 ath9k_regd_get_rd(struct ath_hal *ah)
{
	return ath9k_regd_get_eepromRD(ah);
}

bool ath9k_is_world_regd(struct ath_hal *ah)
{
	return isWwrSKU(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_hal *ah)
{
	switch (ah->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);
}

/*
 * Enable adhoc on 5 GHz if allowed by 11d.
 * Remove passive scan if channel is allowed by 11d,
 * except when on radar frequencies.
 */
static void ath9k_reg_apply_5ghz_beaconing_flags(struct wiphy *wiphy,
					     enum reg_set_by setby)
{
	struct ieee80211_supported_band *sband;
	const struct ieee80211_reg_rule *reg_rule;
	struct ieee80211_channel *ch;
	unsigned int i;
	u32 bandwidth = 0;
	int r;

	if (setby != REGDOM_SET_BY_COUNTRY_IE)
		return;
	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];
		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
		 * if it allows us to use it. Note that we would have disabled
		 * it by applying our static world regdomain by default during
		 * probe */
		if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
			ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
		if (!ath9k_is_radar_freq(ch->center_freq))
			continue;
		if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
			ch->flags &= ~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 reg_set_by setby)
{
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	const struct ieee80211_reg_rule *reg_rule;
	u32 bandwidth = 0;
	int r;

	/* Force passive scan on Channels 12-13 */
	sband = wiphy->bands[IEEE80211_BAND_2GHZ];

	/* If no country IE has been received always enable active scan
	 * on these channels */
	if (setby != 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 probe processing on
	 * 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 reg_set_by setby)
{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct ath_softc *sc = hw->priv;
	struct ath_hal *ah = sc->sc_ah;

	switch (ah->regpair->regDmnEnum) {
	case 0x60:
	case 0x63:
	case 0x66:
	case 0x67:
		ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
		break;
	case 0x68:
		ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
		ath9k_reg_apply_active_scan_flags(wiphy, setby);
		break;
	}
	return;
}

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

	/* We always apply this */
	ath9k_reg_apply_radar_flags(wiphy);

	switch (request->initiator) {
	case REGDOM_SET_BY_DRIVER:
	case REGDOM_SET_BY_INIT:
	case REGDOM_SET_BY_CORE:
	case REGDOM_SET_BY_USER:
		break;
	case 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_hal *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(struct ath_hal *ah)
{
	u16 rd;

	rd = ath9k_regd_get_eepromRD(ah);
	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_hal *ah)
{
	struct country_code_to_enum_rd *country = NULL;
	int regdmn;

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

	ah->ah_countryCode = ath9k_regd_get_default_country(ah);

	if (ah->ah_countryCode == CTRY_DEFAULT &&
	    ath9k_regd_get_eepromRD(ah) == CTRY_DEFAULT)
		ah->ah_countryCode = CTRY_UNITED_STATES;

	if (ah->ah_countryCode == CTRY_DEFAULT) {
		regdmn = ath9k_regd_get_eepromRD(ah);
		country = NULL;
	} else {
		country = ath9k_regd_find_country(ah->ah_countryCode);
		if (country == NULL) {
			DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
				"Country is NULL!!!!, cc= %d\n",
				ah->ah_countryCode);
			return -EINVAL;
		} else
			regdmn = country->regDmnEnum;
	}

	ah->ah_currentRDInUse = regdmn;
	ah->regpair = ath9k_get_regpair(regdmn);

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

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

	return 0;
}

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

	if (!ah->regpair ||
	    (ah->ah_countryCode == CTRY_DEFAULT && isWwrSKU(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->regpair->reg_2ghz_ctl | CTL_11B;
	else if (IS_CHAN_G(chan))
		ctl = ah->regpair->reg_5ghz_ctl | CTL_11G;
	else
		ctl = ah->regpair->reg_5ghz_ctl | CTL_11A;

	return ctl;
}
Commit	Line	Data
f078f209 LR	1	/*
	2	* Copyright (c) 2008 Atheros Communications Inc.
	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 LR	108
	109	static u16 ath9k_regd_get_eepromRD(struct ath_hal *ah)
	110	{
	111	return ah->ah_currentRD & ~WORLDWIDE_ROAMING_FLAG;
	112	}
	113
5f8e077c	114	u16 ath9k_regd_get_rd(struct ath_hal *ah)
f078f209	115	{
5f8e077c LR	116	return ath9k_regd_get_eepromRD(ah);
5f8e077c LR	117	}
f078f209	118
5f8e077c LR	119	bool ath9k_is_world_regd(struct ath_hal *ah)
	120	{
	121	return isWwrSKU(ah);
f078f209 LR	122	}
f078f209 LR	123
5f8e077c	124	const struct ieee80211_regdomain *ath9k_default_world_regdomain(void)
f078f209	125	{
5f8e077c LR	126	/* this is the most restrictive */
	127	return &ath9k_world_regdom_64;
	128	}
f078f209	129
5f8e077c LR	130	const struct ieee80211_regdomain ath9k_world_regdomain(struct ath_hal ah)
	131	{
	132	switch (ah->regpair->regDmnEnum) {
	133	case 0x60:
	134	case 0x61:
	135	case 0x62:
	136	return &ath9k_world_regdom_60_61_62;
	137	case 0x63:
	138	case 0x65:
	139	return &ath9k_world_regdom_63_65;
	140	case 0x64:
	141	return &ath9k_world_regdom_64;
	142	case 0x66:
	143	case 0x69:
	144	return &ath9k_world_regdom_66_69;
	145	case 0x67:
	146	case 0x68:
	147	case 0x6A:
	148	return &ath9k_world_regdom_67_68_6A;
	149	default:
	150	WARN_ON(1);
	151	return ath9k_default_world_regdomain();
f078f209	152	}
f078f209 LR	153	}
f078f209 LR	154
547e4c2e LR	155	/* Frequency is one where radar detection is required */
	156	static bool ath9k_is_radar_freq(u16 center_freq)
	157	{
	158	return (center_freq >= 5260 && center_freq <= 5700);
	159	}
	160
7519a8f0 LR	161	/*
	162	* Enable adhoc on 5 GHz if allowed by 11d.
	163	* Remove passive scan if channel is allowed by 11d,
	164	* except when on radar frequencies.
	165	*/
	166	static void ath9k_reg_apply_5ghz_beaconing_flags(struct wiphy *wiphy,
5f8e077c	167	enum reg_set_by setby)
f078f209	168	{
5f8e077c LR	169	struct ieee80211_supported_band *sband;
	170	const struct ieee80211_reg_rule *reg_rule;
	171	struct ieee80211_channel *ch;
	172	unsigned int i;
	173	u32 bandwidth = 0;
	174	int r;
	175
	176	if (setby != REGDOM_SET_BY_COUNTRY_IE)
	177	return;
8c63c46d	178	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
5f8e077c	179	return;
f078f209	180
5f8e077c LR	181	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
	182	for (i = 0; i < sband->n_channels; i++) {
	183	ch = &sband->channels[i];
	184	r = freq_reg_info(wiphy, ch->center_freq,
	185	&bandwidth, &reg_rule);
	186	if (r)
	187	continue;
	188	/* If 11d had a rule for this channel ensure we enable adhoc
	189	* if it allows us to use it. Note that we would have disabled
	190	* it by applying our static world regdomain by default during
	191	* probe */
	192	if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
de9f97ef	193	ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
7519a8f0 LR	194	if (!ath9k_is_radar_freq(ch->center_freq))
	195	continue;
	196	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
de9f97ef	197	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
5f8e077c	198	}
f078f209 LR	199	}
f078f209 LR	200
5f8e077c LR	201	/* Allows active scan scan on Ch 12 and 13 */
	202	static void ath9k_reg_apply_active_scan_flags(struct wiphy *wiphy,
	203	enum reg_set_by setby)
f078f209	204	{
5f8e077c LR	205	struct ieee80211_supported_band *sband;
	206	struct ieee80211_channel *ch;
	207	const struct ieee80211_reg_rule *reg_rule;
	208	u32 bandwidth = 0;
	209	int r;
	210
	211	/* Force passive scan on Channels 12-13 */
	212	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
	213
	214	/* If no country IE has been received always enable active scan
	215	* on these channels */
	216	if (setby != REGDOM_SET_BY_COUNTRY_IE) {
	217	ch = &sband->channels[11]; /* CH 12 */
	218	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	219	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
	220	ch = &sband->channels[12]; /* CH 13 */
	221	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	222	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
	223	return;
	224	}
f078f209	225
5f8e077c LR	226	/* If a country IE has been recieved check its rule for this
	227	* channel first before enabling active scan. The passive scan
	228	* would have been enforced by the initial probe processing on
	229	* our custom regulatory domain. */
f078f209	230
5f8e077c LR	231	ch = &sband->channels[11]; /* CH 12 */
	232	r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, &reg_rule);
	233	if (!r) {
	234	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
	235	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	236	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
f078f209 LR	237	}
f078f209 LR	238
5f8e077c LR	239	ch = &sband->channels[12]; /* CH 13 */
	240	r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, &reg_rule);
	241	if (!r) {
	242	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
	243	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	244	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
f078f209	245	}
f078f209 LR	246	}
f078f209 LR	247
5f8e077c LR	248	/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
5f8e077c LR	249	void ath9k_reg_apply_radar_flags(struct wiphy *wiphy)
f078f209	250	{
5f8e077c LR	251	struct ieee80211_supported_band *sband;
	252	struct ieee80211_channel *ch;
	253	unsigned int i;
f078f209	254
5f8e077c LR	255	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
5f8e077c LR	256	return;
f078f209	257
5f8e077c	258	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
f078f209	259
5f8e077c LR	260	for (i = 0; i < sband->n_channels; i++) {
5f8e077c LR	261	ch = &sband->channels[i];
547e4c2e	262	if (!ath9k_is_radar_freq(ch->center_freq))
5f8e077c LR	263	continue;
	264	/* We always enable radar detection/DFS on this
	265	* frequency range. Additionally we also apply on
	266	* this frequency range:
	267	* - If STA mode does not yet have DFS supports disable
	268	* active scanning
	269	* - If adhoc mode does not support DFS yet then
	270	* disable adhoc in the frequency.
	271	* - If AP mode does not yet support radar detection/DFS
	272	* do not allow AP mode
	273	*/
	274	if (!(ch->flags & IEEE80211_CHAN_DISABLED))
	275	ch->flags \|= IEEE80211_CHAN_RADAR \|
	276	IEEE80211_CHAN_NO_IBSS \|
	277	IEEE80211_CHAN_PASSIVE_SCAN;
	278	}
	279	}
f078f209	280
5f8e077c LR	281	void ath9k_reg_apply_world_flags(struct wiphy *wiphy, enum reg_set_by setby)
	282	{
	283	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	284	struct ath_softc *sc = hw->priv;
	285	struct ath_hal *ah = sc->sc_ah;
	286
	287	switch (ah->regpair->regDmnEnum) {
	288	case 0x60:
	289	case 0x63:
	290	case 0x66:
	291	case 0x67:
7519a8f0	292	ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
5f8e077c LR	293	break;
5f8e077c LR	294	case 0x68:
7519a8f0	295	ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
5f8e077c LR	296	ath9k_reg_apply_active_scan_flags(wiphy, setby);
	297	break;
	298	}
	299	return;
	300	}
f078f209	301
5f8e077c LR	302	int ath9k_reg_notifier(struct wiphy wiphy, struct regulatory_request request)
	303	{
	304	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	305	struct ath_softc *sc = hw->priv;
f078f209	306
5f8e077c LR	307	/* We always apply this */
5f8e077c LR	308	ath9k_reg_apply_radar_flags(wiphy);
f078f209	309
5f8e077c LR	310	switch (request->initiator) {
	311	case REGDOM_SET_BY_DRIVER:
	312	case REGDOM_SET_BY_INIT:
	313	case REGDOM_SET_BY_CORE:
	314	case REGDOM_SET_BY_USER:
	315	break;
	316	case REGDOM_SET_BY_COUNTRY_IE:
	317	if (ath9k_is_world_regd(sc->sc_ah))
	318	ath9k_reg_apply_world_flags(wiphy, request->initiator);
	319	break;
	320	}
f078f209	321
5f8e077c	322	return 0;
f078f209 LR	323	}
f078f209 LR	324
5f8e077c	325	bool ath9k_regd_is_eeprom_valid(struct ath_hal *ah)
f078f209	326	{
5f8e077c LR	327	u16 rd = ath9k_regd_get_eepromRD(ah);
5f8e077c LR	328	int i;
f078f209	329
5f8e077c LR	330	if (rd & COUNTRY_ERD_FLAG) {
	331	/* EEPROM value is a country code */
	332	u16 cc = rd & ~COUNTRY_ERD_FLAG;
	333	for (i = 0; i < ARRAY_SIZE(allCountries); i++)
	334	if (allCountries[i].countryCode == cc)
	335	return true;
	336	} else {
	337	/* EEPROM value is a regpair value */
	338	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
	339	if (regDomainPairs[i].regDmnEnum == rd)
	340	return true;
f078f209	341	}
5f8e077c LR	342	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
5f8e077c LR	343	"invalid regulatory domain/country code 0x%x\n", rd);
f078f209 LR	344	return false;
	345	}
	346
5f8e077c	347	/* EEPROM country code to regpair mapping */
f078f209 LR	348	static struct country_code_to_enum_rd*
	349	ath9k_regd_find_country(u16 countryCode)
	350	{
	351	int i;
	352
	353	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
	354	if (allCountries[i].countryCode == countryCode)
	355	return &allCountries[i];
	356	}
	357	return NULL;
	358	}
	359
5f8e077c LR	360	/* EEPROM rd code to regpair mapping */
	361	static struct country_code_to_enum_rd*
	362	ath9k_regd_find_country_by_rd(int regdmn)
	363	{
	364	int i;
	365
	366	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
	367	if (allCountries[i].regDmnEnum == regdmn)
	368	return &allCountries[i];
	369	}
	370	return NULL;
	371	}
	372
	373	/* Returns the map of the EEPROM set RD to a country code */
f078f209 LR	374	static u16 ath9k_regd_get_default_country(struct ath_hal *ah)
	375	{
	376	u16 rd;
f078f209 LR	377
	378	rd = ath9k_regd_get_eepromRD(ah);
	379	if (rd & COUNTRY_ERD_FLAG) {
	380	struct country_code_to_enum_rd *country = NULL;
	381	u16 cc = rd & ~COUNTRY_ERD_FLAG;
	382
	383	country = ath9k_regd_find_country(cc);
	384	if (country != NULL)
	385	return cc;
	386	}
	387
f078f209 LR	388	return CTRY_DEFAULT;
	389	}
	390
5f8e077c LR	391	static struct reg_dmn_pair_mapping*
5f8e077c LR	392	ath9k_get_regpair(int regdmn)
f078f209 LR	393	{
	394	int i;
	395
5f8e077c LR	396	if (regdmn == NO_ENUMRD)
5f8e077c LR	397	return NULL;
f078f209	398	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
5f8e077c LR	399	if (regDomainPairs[i].regDmnEnum == regdmn)
5f8e077c LR	400	return &regDomainPairs[i];
f078f209	401	}
5f8e077c	402	return NULL;
f078f209 LR	403	}
f078f209 LR	404
5f8e077c	405	int ath9k_regd_init(struct ath_hal *ah)
f078f209	406	{
f078f209	407	struct country_code_to_enum_rd *country = NULL;
f078f209	408	int regdmn;
f078f209 LR	409
	410	if (!ath9k_regd_is_eeprom_valid(ah)) {
	411	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
04bd4638	412	"Invalid EEPROM contents\n");
5f8e077c	413	return -EINVAL;
f078f209 LR	414	}
	415
	416	ah->ah_countryCode = ath9k_regd_get_default_country(ah);
	417
5f8e077c LR	418	if (ah->ah_countryCode == CTRY_DEFAULT &&
	419	ath9k_regd_get_eepromRD(ah) == CTRY_DEFAULT)
	420	ah->ah_countryCode = CTRY_UNITED_STATES;
f078f209	421
f078f209 LR	422	if (ah->ah_countryCode == CTRY_DEFAULT) {
	423	regdmn = ath9k_regd_get_eepromRD(ah);
	424	country = NULL;
	425	} else {
f078f209 LR	426	country = ath9k_regd_find_country(ah->ah_countryCode);
	427	if (country == NULL) {
	428	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
	429	"Country is NULL!!!!, cc= %d\n",
	430	ah->ah_countryCode);
5f8e077c LR	431	return -EINVAL;
5f8e077c LR	432	} else
f078f209	433	regdmn = country->regDmnEnum;
f078f209 LR	434	}
f078f209 LR	435
5f8e077c LR	436	ah->ah_currentRDInUse = regdmn;
5f8e077c LR	437	ah->regpair = ath9k_get_regpair(regdmn);
f078f209	438
5f8e077c LR	439	if (!ah->regpair) {
	440	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	441	"No regulatory domain pair found, cannot continue\n");
	442	return -EINVAL;
f078f209	443	}
f078f209	444
5f8e077c LR	445	if (!country)
5f8e077c LR	446	country = ath9k_regd_find_country_by_rd(regdmn);
f078f209	447
5f8e077c LR	448	if (country) {
	449	ah->alpha2[0] = country->isoName[0];
	450	ah->alpha2[1] = country->isoName[1];
f078f209	451	} else {
5f8e077c LR	452	ah->alpha2[0] = '0';
5f8e077c LR	453	ah->alpha2[1] = '0';
f078f209 LR	454	}
f078f209 LR	455
f078f209	456	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
0c6666e4	457	"Country alpha2 being used: %c%c\n"
5f8e077c LR	458	"Regpair detected: 0x%0x\n",
	459	ah->alpha2[0], ah->alpha2[1],
	460	ah->regpair->regDmnEnum);
f078f209	461
5f8e077c	462	return 0;
f078f209 LR	463	}
	464
	465	u32 ath9k_regd_get_ctl(struct ath_hal ah, struct ath9k_channel chan)
	466	{
	467	u32 ctl = NO_CTL;
f078f209	468
5f8e077c LR	469	if (!ah->regpair \|\|
5f8e077c LR	470	(ah->ah_countryCode == CTRY_DEFAULT && isWwrSKU(ah))) {
f078f209 LR	471	if (IS_CHAN_B(chan))
	472	ctl = SD_NO_CTL \| CTL_11B;
	473	else if (IS_CHAN_G(chan))
	474	ctl = SD_NO_CTL \| CTL_11G;
	475	else
	476	ctl = SD_NO_CTL \| CTL_11A;
5f8e077c	477	return ctl;
f078f209	478	}
f078f209	479
5f8e077c LR	480	if (IS_CHAN_B(chan))
	481	ctl = ah->regpair->reg_2ghz_ctl \| CTL_11B;
	482	else if (IS_CHAN_G(chan))
	483	ctl = ah->regpair->reg_5ghz_ctl \| CTL_11G;
	484	else
	485	ctl = ah->regpair->reg_5ghz_ctl \| CTL_11A;
f078f209	486
5f8e077c	487	return ctl;
f078f209	488	}