[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 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);
}

/*
 * 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_hw *ah = sc->sc_ah;

	switch (ah->regulatory.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_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_5ghz_ctl | CTL_11G;
	else
		ctl = ah->regulatory.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	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 LR	162	/*
	163	* Enable adhoc on 5 GHz if allowed by 11d.
	164	* Remove passive scan if channel is allowed by 11d,
	165	* except when on radar frequencies.
	166	*/
	167	static void ath9k_reg_apply_5ghz_beaconing_flags(struct wiphy *wiphy,
5f8e077c	168	enum reg_set_by setby)
f078f209	169	{
5f8e077c LR	170	struct ieee80211_supported_band *sband;
	171	const struct ieee80211_reg_rule *reg_rule;
	172	struct ieee80211_channel *ch;
	173	unsigned int i;
	174	u32 bandwidth = 0;
	175	int r;
	176
	177	if (setby != REGDOM_SET_BY_COUNTRY_IE)
	178	return;
8c63c46d	179	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
5f8e077c	180	return;
f078f209	181
5f8e077c LR	182	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
	183	for (i = 0; i < sband->n_channels; i++) {
	184	ch = &sband->channels[i];
	185	r = freq_reg_info(wiphy, ch->center_freq,
	186	&bandwidth, &reg_rule);
	187	if (r)
	188	continue;
	189	/* If 11d had a rule for this channel ensure we enable adhoc
	190	* if it allows us to use it. Note that we would have disabled
	191	* it by applying our static world regdomain by default during
	192	* probe */
	193	if (!(reg_rule->flags & NL80211_RRF_NO_IBSS))
de9f97ef	194	ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
7519a8f0 LR	195	if (!ath9k_is_radar_freq(ch->center_freq))
	196	continue;
	197	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
de9f97ef	198	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
5f8e077c	199	}
f078f209 LR	200	}
f078f209 LR	201
5f8e077c LR	202	/* Allows active scan scan on Ch 12 and 13 */
	203	static void ath9k_reg_apply_active_scan_flags(struct wiphy *wiphy,
	204	enum reg_set_by setby)
f078f209	205	{
5f8e077c LR	206	struct ieee80211_supported_band *sband;
	207	struct ieee80211_channel *ch;
	208	const struct ieee80211_reg_rule *reg_rule;
	209	u32 bandwidth = 0;
	210	int r;
	211
	212	/* Force passive scan on Channels 12-13 */
	213	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
	214
	215	/* If no country IE has been received always enable active scan
	216	* on these channels */
	217	if (setby != REGDOM_SET_BY_COUNTRY_IE) {
	218	ch = &sband->channels[11]; /* CH 12 */
	219	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	220	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
	221	ch = &sband->channels[12]; /* CH 13 */
	222	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	223	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
	224	return;
	225	}
f078f209	226
5f8e077c LR	227	/* If a country IE has been recieved check its rule for this
	228	* channel first before enabling active scan. The passive scan
	229	* would have been enforced by the initial probe processing on
	230	* our custom regulatory domain. */
f078f209	231
5f8e077c LR	232	ch = &sband->channels[11]; /* CH 12 */
	233	r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, &reg_rule);
	234	if (!r) {
	235	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
	236	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	237	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
f078f209 LR	238	}
f078f209 LR	239
5f8e077c LR	240	ch = &sband->channels[12]; /* CH 13 */
	241	r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, &reg_rule);
	242	if (!r) {
	243	if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
	244	if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
	245	ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
f078f209	246	}
f078f209 LR	247	}
f078f209 LR	248
5f8e077c LR	249	/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
5f8e077c LR	250	void ath9k_reg_apply_radar_flags(struct wiphy *wiphy)
f078f209	251	{
5f8e077c LR	252	struct ieee80211_supported_band *sband;
	253	struct ieee80211_channel *ch;
	254	unsigned int i;
f078f209	255
5f8e077c LR	256	if (!wiphy->bands[IEEE80211_BAND_5GHZ])
5f8e077c LR	257	return;
f078f209	258
5f8e077c	259	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
f078f209	260
5f8e077c LR	261	for (i = 0; i < sband->n_channels; i++) {
5f8e077c LR	262	ch = &sband->channels[i];
547e4c2e	263	if (!ath9k_is_radar_freq(ch->center_freq))
5f8e077c LR	264	continue;
	265	/* We always enable radar detection/DFS on this
	266	* frequency range. Additionally we also apply on
	267	* this frequency range:
	268	* - If STA mode does not yet have DFS supports disable
	269	* active scanning
	270	* - If adhoc mode does not support DFS yet then
	271	* disable adhoc in the frequency.
	272	* - If AP mode does not yet support radar detection/DFS
	273	* do not allow AP mode
	274	*/
	275	if (!(ch->flags & IEEE80211_CHAN_DISABLED))
	276	ch->flags \|= IEEE80211_CHAN_RADAR \|
	277	IEEE80211_CHAN_NO_IBSS \|
	278	IEEE80211_CHAN_PASSIVE_SCAN;
	279	}
	280	}
f078f209	281
5f8e077c LR	282	void ath9k_reg_apply_world_flags(struct wiphy *wiphy, enum reg_set_by setby)
	283	{
	284	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	285	struct ath_softc *sc = hw->priv;
cbe61d8a	286	struct ath_hw *ah = sc->sc_ah;
5f8e077c	287
d6bad496	288	switch (ah->regulatory.regpair->regDmnEnum) {
5f8e077c LR	289	case 0x60:
	290	case 0x63:
	291	case 0x66:
	292	case 0x67:
7519a8f0	293	ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
5f8e077c LR	294	break;
5f8e077c LR	295	case 0x68:
7519a8f0	296	ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby);
5f8e077c LR	297	ath9k_reg_apply_active_scan_flags(wiphy, setby);
	298	break;
	299	}
	300	return;
	301	}
f078f209	302
5f8e077c LR	303	int ath9k_reg_notifier(struct wiphy wiphy, struct regulatory_request request)
	304	{
	305	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	306	struct ath_softc *sc = hw->priv;
f078f209	307
5f8e077c LR	308	/* We always apply this */
5f8e077c LR	309	ath9k_reg_apply_radar_flags(wiphy);
f078f209	310
5f8e077c LR	311	switch (request->initiator) {
	312	case REGDOM_SET_BY_DRIVER:
	313	case REGDOM_SET_BY_INIT:
	314	case REGDOM_SET_BY_CORE:
	315	case REGDOM_SET_BY_USER:
	316	break;
	317	case REGDOM_SET_BY_COUNTRY_IE:
	318	if (ath9k_is_world_regd(sc->sc_ah))
	319	ath9k_reg_apply_world_flags(wiphy, request->initiator);
	320	break;
	321	}
f078f209	322
5f8e077c	323	return 0;
f078f209 LR	324	}
f078f209 LR	325
cbe61d8a	326	bool ath9k_regd_is_eeprom_valid(struct ath_hw *ah)
f078f209	327	{
5f8e077c LR	328	u16 rd = ath9k_regd_get_eepromRD(ah);
5f8e077c LR	329	int i;
f078f209	330
5f8e077c LR	331	if (rd & COUNTRY_ERD_FLAG) {
	332	/* EEPROM value is a country code */
	333	u16 cc = rd & ~COUNTRY_ERD_FLAG;
	334	for (i = 0; i < ARRAY_SIZE(allCountries); i++)
	335	if (allCountries[i].countryCode == cc)
	336	return true;
	337	} else {
	338	/* EEPROM value is a regpair value */
	339	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
	340	if (regDomainPairs[i].regDmnEnum == rd)
	341	return true;
f078f209	342	}
5f8e077c LR	343	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
5f8e077c LR	344	"invalid regulatory domain/country code 0x%x\n", rd);
f078f209 LR	345	return false;
	346	}
	347
5f8e077c	348	/* EEPROM country code to regpair mapping */
f078f209 LR	349	static struct country_code_to_enum_rd*
	350	ath9k_regd_find_country(u16 countryCode)
	351	{
	352	int i;
	353
	354	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
	355	if (allCountries[i].countryCode == countryCode)
	356	return &allCountries[i];
	357	}
	358	return NULL;
	359	}
	360
5f8e077c LR	361	/* EEPROM rd code to regpair mapping */
	362	static struct country_code_to_enum_rd*
	363	ath9k_regd_find_country_by_rd(int regdmn)
	364	{
	365	int i;
	366
	367	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
	368	if (allCountries[i].regDmnEnum == regdmn)
	369	return &allCountries[i];
	370	}
	371	return NULL;
	372	}
	373
	374	/* Returns the map of the EEPROM set RD to a country code */
e775aaf0	375	static u16 ath9k_regd_get_default_country(u16 rd)
f078f209	376	{
f078f209 LR	377	if (rd & COUNTRY_ERD_FLAG) {
	378	struct country_code_to_enum_rd *country = NULL;
	379	u16 cc = rd & ~COUNTRY_ERD_FLAG;
	380
	381	country = ath9k_regd_find_country(cc);
	382	if (country != NULL)
	383	return cc;
	384	}
	385
f078f209 LR	386	return CTRY_DEFAULT;
	387	}
	388
5f8e077c LR	389	static struct reg_dmn_pair_mapping*
5f8e077c LR	390	ath9k_get_regpair(int regdmn)
f078f209 LR	391	{
	392	int i;
	393
5f8e077c LR	394	if (regdmn == NO_ENUMRD)
5f8e077c LR	395	return NULL;
f078f209	396	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
5f8e077c LR	397	if (regDomainPairs[i].regDmnEnum == regdmn)
5f8e077c LR	398	return &regDomainPairs[i];
f078f209	399	}
5f8e077c	400	return NULL;
f078f209 LR	401	}
f078f209 LR	402
cbe61d8a	403	int ath9k_regd_init(struct ath_hw *ah)
f078f209	404	{
f078f209	405	struct country_code_to_enum_rd *country = NULL;
e775aaf0	406	u16 regdmn;
f078f209 LR	407
	408	if (!ath9k_regd_is_eeprom_valid(ah)) {
	409	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
04bd4638	410	"Invalid EEPROM contents\n");
5f8e077c	411	return -EINVAL;
f078f209 LR	412	}
f078f209 LR	413
e775aaf0 BC	414	regdmn = ath9k_regd_get_eepromRD(ah);
e775aaf0 BC	415	ah->regulatory.country_code = ath9k_regd_get_default_country(regdmn);
f078f209	416
d6bad496	417	if (ah->regulatory.country_code == CTRY_DEFAULT &&
e775aaf0	418	regdmn == CTRY_DEFAULT)
d6bad496	419	ah->regulatory.country_code = CTRY_UNITED_STATES;
f078f209	420
d6bad496	421	if (ah->regulatory.country_code == CTRY_DEFAULT) {
f078f209 LR	422	country = NULL;
f078f209 LR	423	} else {
d6bad496	424	country = ath9k_regd_find_country(ah->regulatory.country_code);
f078f209 LR	425	if (country == NULL) {
	426	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
	427	"Country is NULL!!!!, cc= %d\n",
d6bad496	428	ah->regulatory.country_code);
5f8e077c LR	429	return -EINVAL;
5f8e077c LR	430	} else
f078f209	431	regdmn = country->regDmnEnum;
f078f209 LR	432	}
f078f209 LR	433
d6bad496	434	ah->regulatory.regpair = ath9k_get_regpair(regdmn);
f078f209	435
d6bad496	436	if (!ah->regulatory.regpair) {
5f8e077c LR	437	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	438	"No regulatory domain pair found, cannot continue\n");
	439	return -EINVAL;
f078f209	440	}
f078f209	441
5f8e077c LR	442	if (!country)
5f8e077c LR	443	country = ath9k_regd_find_country_by_rd(regdmn);
f078f209	444
5f8e077c	445	if (country) {
d6bad496 S	446	ah->regulatory.alpha2[0] = country->isoName[0];
d6bad496 S	447	ah->regulatory.alpha2[1] = country->isoName[1];
f078f209	448	} else {
d6bad496 S	449	ah->regulatory.alpha2[0] = '0';
d6bad496 S	450	ah->regulatory.alpha2[1] = '0';
f078f209 LR	451	}
f078f209 LR	452
f078f209	453	DPRINTF(ah->ah_sc, ATH_DBG_REGULATORY,
0c6666e4	454	"Country alpha2 being used: %c%c\n"
d6bad496 S	455	"Regulatory.Regpair detected: 0x%0x\n",
	456	ah->regulatory.alpha2[0], ah->regulatory.alpha2[1],
	457	ah->regulatory.regpair->regDmnEnum);
f078f209	458
5f8e077c	459	return 0;
f078f209 LR	460	}
f078f209 LR	461
cbe61d8a	462	u32 ath9k_regd_get_ctl(struct ath_hw ah, struct ath9k_channel chan)
f078f209 LR	463	{
f078f209 LR	464	u32 ctl = NO_CTL;
f078f209	465
d6bad496	466	if (!ah->regulatory.regpair \|\|
d0f48f9d BC	467	(ah->regulatory.country_code == CTRY_DEFAULT &&
d0f48f9d BC	468	is_wwr_sku(ath9k_regd_get_eepromRD(ah)))) {
f078f209 LR	469	if (IS_CHAN_B(chan))
	470	ctl = SD_NO_CTL \| CTL_11B;
	471	else if (IS_CHAN_G(chan))
	472	ctl = SD_NO_CTL \| CTL_11G;
	473	else
	474	ctl = SD_NO_CTL \| CTL_11A;
5f8e077c	475	return ctl;
f078f209	476	}
f078f209	477
5f8e077c	478	if (IS_CHAN_B(chan))
d6bad496	479	ctl = ah->regulatory.regpair->reg_2ghz_ctl \| CTL_11B;
5f8e077c	480	else if (IS_CHAN_G(chan))
d6bad496	481	ctl = ah->regulatory.regpair->reg_5ghz_ctl \| CTL_11G;
5f8e077c	482	else
d6bad496	483	ctl = ah->regulatory.regpair->reg_5ghz_ctl \| CTL_11A;
f078f209	484
5f8e077c	485	return ctl;
f078f209	486	}