Initial import

1 files changed, 805 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/regd.c b/drivers/net/wireless/ath/regd.c
new file mode 100644
index 000000000..06ea6cc9e
--- /dev/null
+++ b/drivers/net/wireless/ath/regd.c
@@ -0,0 +1,805 @@
+/*
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+#include "regd.h"
+#include "regd_common.h"
+
+static int __ath_regd_init(struct ath_regulatory *reg);
+
+/*
+ * 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_NO_IR)
+#define ATH9K_2GHZ_CH14		REG_RULE(2484-10, 2484+10, 40, 0, 20,\
+					 NL80211_RRF_NO_IR | \
+					 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, 80, 0, 30,\
+					 NL80211_RRF_NO_IR)
+#define ATH9K_5GHZ_5470_5850	REG_RULE(5470-10, 5850+10, 80, 0, 30,\
+					 NL80211_RRF_NO_IR)
+#define ATH9K_5GHZ_5725_5850	REG_RULE(5725-10, 5850+10, 80, 0, 30,\
+					 NL80211_RRF_NO_IR)
+
+#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 ath_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 ath_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 ath_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 ath_world_regdom_66_69 = {
+	.n_reg_rules = 3,
+	.alpha2 =  "99",
+	.reg_rules = {
+		ATH9K_2GHZ_CH01_11,
+		ATH9K_5GHZ_ALL,
+	}
+};
+
+/* Can be used by 0x67, 0x68, 0x6A and 0x6C */
+static const struct ieee80211_regdomain ath_world_regdom_67_68_6A_6C = {
+	.n_reg_rules = 4,
+	.alpha2 =  "99",
+	.reg_rules = {
+		ATH9K_2GHZ_CH01_11,
+		ATH9K_2GHZ_CH12_13,
+		ATH9K_5GHZ_ALL,
+	}
+};
+
+static bool dynamic_country_user_possible(struct ath_regulatory *reg)
+{
+	if (config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_CERT_TESTING))
+		return true;
+
+	switch (reg->country_code) {
+	case CTRY_UNITED_STATES:
+	case CTRY_JAPAN1:
+	case CTRY_JAPAN2:
+	case CTRY_JAPAN3:
+	case CTRY_JAPAN4:
+	case CTRY_JAPAN5:
+	case CTRY_JAPAN6:
+	case CTRY_JAPAN7:
+	case CTRY_JAPAN8:
+	case CTRY_JAPAN9:
+	case CTRY_JAPAN10:
+	case CTRY_JAPAN11:
+	case CTRY_JAPAN12:
+	case CTRY_JAPAN13:
+	case CTRY_JAPAN14:
+	case CTRY_JAPAN15:
+	case CTRY_JAPAN16:
+	case CTRY_JAPAN17:
+	case CTRY_JAPAN18:
+	case CTRY_JAPAN19:
+	case CTRY_JAPAN20:
+	case CTRY_JAPAN21:
+	case CTRY_JAPAN22:
+	case CTRY_JAPAN23:
+	case CTRY_JAPAN24:
+	case CTRY_JAPAN25:
+	case CTRY_JAPAN26:
+	case CTRY_JAPAN27:
+	case CTRY_JAPAN28:
+	case CTRY_JAPAN29:
+	case CTRY_JAPAN30:
+	case CTRY_JAPAN31:
+	case CTRY_JAPAN32:
+	case CTRY_JAPAN33:
+	case CTRY_JAPAN34:
+	case CTRY_JAPAN35:
+	case CTRY_JAPAN36:
+	case CTRY_JAPAN37:
+	case CTRY_JAPAN38:
+	case CTRY_JAPAN39:
+	case CTRY_JAPAN40:
+	case CTRY_JAPAN41:
+	case CTRY_JAPAN42:
+	case CTRY_JAPAN43:
+	case CTRY_JAPAN44:
+	case CTRY_JAPAN45:
+	case CTRY_JAPAN46:
+	case CTRY_JAPAN47:
+	case CTRY_JAPAN48:
+	case CTRY_JAPAN49:
+	case CTRY_JAPAN50:
+	case CTRY_JAPAN51:
+	case CTRY_JAPAN52:
+	case CTRY_JAPAN53:
+	case CTRY_JAPAN54:
+	case CTRY_JAPAN55:
+	case CTRY_JAPAN56:
+	case CTRY_JAPAN57:
+	case CTRY_JAPAN58:
+	case CTRY_JAPAN59:
+		return false;
+	}
+
+	return true;
+}
+
+static bool ath_reg_dyn_country_user_allow(struct ath_regulatory *reg)
+{
+	if (!config_enabled(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS))
+		return false;
+	if (!dynamic_country_user_possible(reg))
+		return false;
+	return true;
+}
+
+static inline bool is_wwr_sku(u16 regd)
+{
+	return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
+		(((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
+		(regd == WORLD));
+}
+
+static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
+{
+	return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
+}
+
+bool ath_is_world_regd(struct ath_regulatory *reg)
+{
+	return is_wwr_sku(ath_regd_get_eepromRD(reg));
+}
+EXPORT_SYMBOL(ath_is_world_regd);
+
+static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
+{
+	/* this is the most restrictive */
+	return &ath_world_regdom_64;
+}
+
+static const struct
+ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
+{
+	switch (reg->regpair->reg_domain) {
+	case 0x60:
+	case 0x61:
+	case 0x62:
+		return &ath_world_regdom_60_61_62;
+	case 0x63:
+	case 0x65:
+		return &ath_world_regdom_63_65;
+	case 0x64:
+		return &ath_world_regdom_64;
+	case 0x66:
+	case 0x69:
+		return &ath_world_regdom_66_69;
+	case 0x67:
+	case 0x68:
+	case 0x6A:
+	case 0x6C:
+		return &ath_world_regdom_67_68_6A_6C;
+	default:
+		WARN_ON(1);
+		return ath_default_world_regdomain();
+	}
+}
+
+bool ath_is_49ghz_allowed(u16 regdomain)
+{
+	/* possibly more */
+	return regdomain == MKK9_MKKC;
+}
+EXPORT_SYMBOL(ath_is_49ghz_allowed);
+
+/* Frequency is one where radar detection is required */
+static bool ath_is_radar_freq(u16 center_freq)
+{
+	return (center_freq >= 5260 && center_freq <= 5700);
+}
+
+static void ath_force_clear_no_ir_chan(struct wiphy *wiphy,
+				       struct ieee80211_channel *ch)
+{
+	const struct ieee80211_reg_rule *reg_rule;
+
+	reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(ch->center_freq));
+	if (IS_ERR(reg_rule))
+		return;
+
+	if (!(reg_rule->flags & NL80211_RRF_NO_IR))
+		if (ch->flags & IEEE80211_CHAN_NO_IR)
+			ch->flags &= ~IEEE80211_CHAN_NO_IR;
+}
+
+static void ath_force_clear_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
+{
+	struct ieee80211_channel *ch;
+
+	ch = ieee80211_get_channel(wiphy, center_freq);
+	if (!ch)
+		return;
+
+	ath_force_clear_no_ir_chan(wiphy, ch);
+}
+
+static void ath_force_no_ir_chan(struct ieee80211_channel *ch)
+{
+	ch->flags |= IEEE80211_CHAN_NO_IR;
+}
+
+static void ath_force_no_ir_freq(struct wiphy *wiphy, u16 center_freq)
+{
+	struct ieee80211_channel *ch;
+
+	ch = ieee80211_get_channel(wiphy, center_freq);
+	if (!ch)
+		return;
+
+	ath_force_no_ir_chan(ch);
+}
+
+static void
+__ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
+				struct ath_regulatory *reg,
+				enum nl80211_reg_initiator initiator,
+				struct ieee80211_channel *ch)
+{
+	if (ath_is_radar_freq(ch->center_freq) ||
+	    (ch->flags & IEEE80211_CHAN_RADAR))
+		return;
+
+	switch (initiator) {
+	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
+		ath_force_clear_no_ir_chan(wiphy, ch);
+		break;
+	case NL80211_REGDOM_SET_BY_USER:
+		if (ath_reg_dyn_country_user_allow(reg))
+			ath_force_clear_no_ir_chan(wiphy, ch);
+		break;
+	default:
+		if (ch->beacon_found)
+			ch->flags &= ~IEEE80211_CHAN_NO_IR;
+	}
+}
+
+/*
+ * These exception rules do not apply radar frequencies.
+ *
+ * - We enable initiating radiation if the country IE says its fine:
+ * - If no country IE has been processed and a we determine we have
+ *   received a beacon on a channel we can enable initiating radiation.
+ */
+static void
+ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
+			      struct ath_regulatory *reg,
+			      enum nl80211_reg_initiator initiator)
+{
+	enum ieee80211_band band;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_channel *ch;
+	unsigned int i;
+
+	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+		if (!wiphy->bands[band])
+			continue;
+		sband = wiphy->bands[band];
+		for (i = 0; i < sband->n_channels; i++) {
+			ch = &sband->channels[i];
+			__ath_reg_apply_beaconing_flags(wiphy, reg,
+							initiator, ch);
+		}
+	}
+}
+
+/**
+ * ath_reg_apply_ir_flags()
+ * @wiphy: the wiphy to use
+ * @initiator: the regulatory hint initiator
+ *
+ * If no country IE has been received always enable passive scan
+ * and no-ibss on these channels. This is only done for specific
+ * regulatory SKUs.
+ *
+ * If a country IE has been received check its rule for this
+ * channel first before enabling active scan. The passive scan
+ * would have been enforced by the initial processing of our
+ * custom regulatory domain.
+ */
+static void
+ath_reg_apply_ir_flags(struct wiphy *wiphy,
+		       struct ath_regulatory *reg,
+		       enum nl80211_reg_initiator initiator)
+{
+	struct ieee80211_supported_band *sband;
+
+	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
+	if (!sband)
+		return;
+
+	switch(initiator) {
+	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
+		ath_force_clear_no_ir_freq(wiphy, 2467);
+		ath_force_clear_no_ir_freq(wiphy, 2472);
+		break;
+	case NL80211_REGDOM_SET_BY_USER:
+		if (!ath_reg_dyn_country_user_allow(reg))
+			break;
+		ath_force_clear_no_ir_freq(wiphy, 2467);
+		ath_force_clear_no_ir_freq(wiphy, 2472);
+		break;
+	default:
+		ath_force_no_ir_freq(wiphy, 2467);
+		ath_force_no_ir_freq(wiphy, 2472);
+	}
+}
+
+/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
+static void ath_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 (!ath_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_IR;
+	}
+}
+
+static void ath_reg_apply_world_flags(struct wiphy *wiphy,
+				      enum nl80211_reg_initiator initiator,
+				      struct ath_regulatory *reg)
+{
+	switch (reg->regpair->reg_domain) {
+	case 0x60:
+	case 0x63:
+	case 0x66:
+	case 0x67:
+	case 0x6C:
+		ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
+		break;
+	case 0x68:
+		ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
+		ath_reg_apply_ir_flags(wiphy, reg, initiator);
+		break;
+	default:
+		if (ath_reg_dyn_country_user_allow(reg))
+			ath_reg_apply_beaconing_flags(wiphy, reg, initiator);
+	}
+}
+
+static u16 ath_regd_find_country_by_name(char *alpha2)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
+		if (!memcmp(allCountries[i].isoName, alpha2, 2))
+			return allCountries[i].countryCode;
+	}
+
+	return -1;
+}
+
+static int __ath_reg_dyn_country(struct wiphy *wiphy,
+				 struct ath_regulatory *reg,
+				 struct regulatory_request *request)
+{
+	u16 country_code;
+
+	if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+	    !ath_is_world_regd(reg))
+		return -EINVAL;
+
+	country_code = ath_regd_find_country_by_name(request->alpha2);
+	if (country_code == (u16) -1)
+		return -EINVAL;
+
+	reg->current_rd = COUNTRY_ERD_FLAG;
+	reg->current_rd |= country_code;
+
+	__ath_regd_init(reg);
+
+	ath_reg_apply_world_flags(wiphy, request->initiator, reg);
+
+	return 0;
+}
+
+static void ath_reg_dyn_country(struct wiphy *wiphy,
+				struct ath_regulatory *reg,
+				struct regulatory_request *request)
+{
+	if (__ath_reg_dyn_country(wiphy, reg, request))
+		return;
+
+	printk(KERN_DEBUG "ath: regdomain 0x%0x "
+			  "dynamically updated by %s\n",
+	       reg->current_rd,
+	       reg_initiator_name(request->initiator));
+}
+
+void ath_reg_notifier_apply(struct wiphy *wiphy,
+			    struct regulatory_request *request,
+			    struct ath_regulatory *reg)
+{
+	struct ath_common *common = container_of(reg, struct ath_common,
+						 regulatory);
+	/* We always apply this */
+	ath_reg_apply_radar_flags(wiphy);
+
+	/*
+	 * This would happen when we have sent a custom regulatory request
+	 * a world regulatory domain and the scheduler hasn't yet processed
+	 * any pending requests in the queue.
+	 */
+	if (!request)
+		return;
+
+	reg->region = request->dfs_region;
+	switch (request->initiator) {
+	case NL80211_REGDOM_SET_BY_CORE:
+		/*
+		 * If common->reg_world_copy is world roaming it means we *were*
+		 * world roaming... so we now have to restore that data.
+		 */
+		if (!ath_is_world_regd(&common->reg_world_copy))
+			break;
+
+		memcpy(reg, &common->reg_world_copy,
+		       sizeof(struct ath_regulatory));
+		break;
+	case NL80211_REGDOM_SET_BY_DRIVER:
+		break;
+	case NL80211_REGDOM_SET_BY_USER:
+		if (ath_reg_dyn_country_user_allow(reg))
+			ath_reg_dyn_country(wiphy, reg, request);
+		break;
+	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
+		ath_reg_dyn_country(wiphy, reg, request);
+		break;
+	}
+}
+EXPORT_SYMBOL(ath_reg_notifier_apply);
+
+static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
+{
+	u16 rd = ath_regd_get_eepromRD(reg);
+	int i;
+
+	if (rd & COUNTRY_ERD_FLAG) {
+		/* EEPROM value is a country code */
+		u16 cc = rd & ~COUNTRY_ERD_FLAG;
+		printk(KERN_DEBUG
+		       "ath: EEPROM indicates we should expect "
+			"a country code\n");
+		for (i = 0; i < ARRAY_SIZE(allCountries); i++)
+			if (allCountries[i].countryCode == cc)
+				return true;
+	} else {
+		/* EEPROM value is a regpair value */
+		if (rd != CTRY_DEFAULT)
+			printk(KERN_DEBUG "ath: EEPROM indicates we "
+			       "should expect a direct regpair map\n");
+		for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
+			if (regDomainPairs[i].reg_domain == rd)
+				return true;
+	}
+	printk(KERN_DEBUG
+		 "ath: invalid regulatory domain/country code 0x%x\n", rd);
+	return false;
+}
+
+/* EEPROM country code to regpair mapping */
+static struct country_code_to_enum_rd*
+ath_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*
+ath_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 ath_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 = ath_regd_find_country(cc);
+		if (country != NULL)
+			return cc;
+	}
+
+	return CTRY_DEFAULT;
+}
+
+static struct reg_dmn_pair_mapping*
+ath_get_regpair(int regdmn)
+{
+	int i;
+
+	if (regdmn == NO_ENUMRD)
+		return NULL;
+	for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
+		if (regDomainPairs[i].reg_domain == regdmn)
+			return &regDomainPairs[i];
+	}
+	return NULL;
+}
+
+static int
+ath_regd_init_wiphy(struct ath_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_STRICT_REG |
+				   REGULATORY_CUSTOM_REG;
+
+	if (ath_is_world_regd(reg)) {
+		/*
+		 * Anything applied here (prior to wiphy registration) gets
+		 * saved on the wiphy orig_* parameters
+		 */
+		regd = ath_world_regdomain(reg);
+		wiphy->regulatory_flags |= REGULATORY_COUNTRY_IE_FOLLOW_POWER;
+	} else {
+		/*
+		 * This gets applied in the case of the absence of CRDA,
+		 * it's our own custom world regulatory domain, similar to
+		 * cfg80211's but we enable passive scanning.
+		 */
+		regd = ath_default_world_regdomain();
+	}
+
+	wiphy_apply_custom_regulatory(wiphy, regd);
+	ath_reg_apply_radar_flags(wiphy);
+	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
+	return 0;
+}
+
+/*
+ * Some users have reported their EEPROM programmed with
+ * 0x8000 set, this is not a supported regulatory domain
+ * but since we have more than one user with it we need
+ * a solution for them. We default to 0x64, which is the
+ * default Atheros world regulatory domain.
+ */
+static void ath_regd_sanitize(struct ath_regulatory *reg)
+{
+	if (reg->current_rd != COUNTRY_ERD_FLAG)
+		return;
+	printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
+	reg->current_rd = 0x64;
+}
+
+static int __ath_regd_init(struct ath_regulatory *reg)
+{
+	struct country_code_to_enum_rd *country = NULL;
+	u16 regdmn;
+
+	if (!reg)
+		return -EINVAL;
+
+	ath_regd_sanitize(reg);
+
+	printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
+
+	if (!ath_regd_is_eeprom_valid(reg)) {
+		pr_err("Invalid EEPROM contents\n");
+		return -EINVAL;
+	}
+
+	regdmn = ath_regd_get_eepromRD(reg);
+	reg->country_code = ath_regd_get_default_country(regdmn);
+
+	if (reg->country_code == CTRY_DEFAULT &&
+	    regdmn == CTRY_DEFAULT) {
+		printk(KERN_DEBUG "ath: EEPROM indicates default "
+		       "country code should be used\n");
+		reg->country_code = CTRY_UNITED_STATES;
+	}
+
+	if (reg->country_code == CTRY_DEFAULT) {
+		country = NULL;
+	} else {
+		printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
+		       "map search\n");
+		country = ath_regd_find_country(reg->country_code);
+		if (country == NULL) {
+			printk(KERN_DEBUG
+				"ath: no valid country maps found for "
+				"country code: 0x%0x\n",
+				reg->country_code);
+			return -EINVAL;
+		} else {
+			regdmn = country->regDmnEnum;
+			printk(KERN_DEBUG "ath: country maps to "
+			       "regdmn code: 0x%0x\n",
+			       regdmn);
+		}
+	}
+
+	reg->regpair = ath_get_regpair(regdmn);
+
+	if (!reg->regpair) {
+		printk(KERN_DEBUG "ath: "
+			"No regulatory domain pair found, cannot continue\n");
+		return -EINVAL;
+	}
+
+	if (!country)
+		country = ath_regd_find_country_by_rd(regdmn);
+
+	if (country) {
+		reg->alpha2[0] = country->isoName[0];
+		reg->alpha2[1] = country->isoName[1];
+	} else {
+		reg->alpha2[0] = '0';
+		reg->alpha2[1] = '0';
+	}
+
+	printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
+		reg->alpha2[0], reg->alpha2[1]);
+	printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
+		reg->regpair->reg_domain);
+
+	return 0;
+}
+
+int
+ath_regd_init(struct ath_regulatory *reg,
+	      struct wiphy *wiphy,
+	      void (*reg_notifier)(struct wiphy *wiphy,
+				   struct regulatory_request *request))
+{
+	struct ath_common *common = container_of(reg, struct ath_common,
+						 regulatory);
+	int r;
+
+	r = __ath_regd_init(reg);
+	if (r)
+		return r;
+
+	if (ath_is_world_regd(reg))
+		memcpy(&common->reg_world_copy, reg,
+		       sizeof(struct ath_regulatory));
+
+	ath_regd_init_wiphy(reg, wiphy, reg_notifier);
+
+	return 0;
+}
+EXPORT_SYMBOL(ath_regd_init);
+
+u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
+			  enum ieee80211_band band)
+{
+	if (!reg->regpair ||
+	    (reg->country_code == CTRY_DEFAULT &&
+	     is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
+		return SD_NO_CTL;
+	}
+
+	if (ath_regd_get_eepromRD(reg) == CTRY_DEFAULT) {
+		switch (reg->region) {
+		case NL80211_DFS_FCC:
+			return CTL_FCC;
+		case NL80211_DFS_ETSI:
+			return CTL_ETSI;
+		case NL80211_DFS_JP:
+			return CTL_MKK;
+		default:
+			break;
+		}
+	}
+
+	switch (band) {
+	case IEEE80211_BAND_2GHZ:
+		return reg->regpair->reg_2ghz_ctl;
+	case IEEE80211_BAND_5GHZ:
+		return reg->regpair->reg_5ghz_ctl;
+	default:
+		return NO_CTL;
+	}
+}
+EXPORT_SYMBOL(ath_regd_get_band_ctl);