Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6

Conflicts:
	net/mac80211/pm.c

1 files changed, 552 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/regd.c b/drivers/net/wireless/ath/regd.c
new file mode 100644
index 00000000000..fdf07c82208
--- /dev/null
+++ b/drivers/net/wireless/ath/regd.c
@@ -0,0 +1,552 @@
+/*
+ * 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 <net/cfg80211.h>
+#include <net/mac80211.h>
+#include "regd.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 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, 0x6A and 0x68 */
+static const struct ieee80211_regdomain ath_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 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->regDmnEnum) {
+	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:
+		return &ath_world_regdom_67_68_6A;
+	default:
+		WARN_ON(1);
+		return ath_default_world_regdomain();
+	}
+}
+
+/* Frequency is one where radar detection is required */
+static bool ath_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
+ath_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 (ath_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
+ath_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 */
+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_IBSS |
+				     IEEE80211_CHAN_PASSIVE_SCAN;
+	}
+}
+
+static void ath_reg_apply_world_flags(struct wiphy *wiphy,
+				      enum nl80211_reg_initiator initiator,
+				      struct ath_regulatory *reg)
+{
+	switch (reg->regpair->regDmnEnum) {
+	case 0x60:
+	case 0x63:
+	case 0x66:
+	case 0x67:
+		ath_reg_apply_beaconing_flags(wiphy, initiator);
+		break;
+	case 0x68:
+		ath_reg_apply_beaconing_flags(wiphy, initiator);
+		ath_reg_apply_active_scan_flags(wiphy, initiator);
+		break;
+	}
+	return;
+}
+
+int ath_reg_notifier_apply(struct wiphy *wiphy,
+			   struct regulatory_request *request,
+			   struct ath_regulatory *reg)
+{
+	/* We always apply this */
+	ath_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 (ath_is_world_regd(reg))
+			ath_reg_apply_world_flags(wiphy, request->initiator,
+						  reg);
+		break;
+	}
+
+	return 0;
+}
+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;
+		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;
+	}
+	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].regDmnEnum == regdmn)
+			return &regDomainPairs[i];
+	}
+	return NULL;
+}
+
+static int
+ath_regd_init_wiphy(struct ath_regulatory *reg,
+		    struct wiphy *wiphy,
+		    int (*reg_notifier)(struct wiphy *wiphy,
+					struct regulatory_request *request))
+{
+	const struct ieee80211_regdomain *regd;
+
+	wiphy->reg_notifier = reg_notifier;
+	wiphy->strict_regulatory = true;
+
+	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->custom_regulatory = true;
+		wiphy->strict_regulatory = false;
+	} else {
+		/*
+		 * This gets applied in the case of the absense 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;
+}
+
+int
+ath_regd_init(struct ath_regulatory *reg,
+	      struct wiphy *wiphy,
+	      int (*reg_notifier)(struct wiphy *wiphy,
+				  struct regulatory_request *request))
+{
+	struct country_code_to_enum_rd *country = NULL;
+	u16 regdmn;
+
+	if (!ath_regd_is_eeprom_valid(reg)) {
+		printk(KERN_ERR "ath: 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)
+		reg->country_code = CTRY_UNITED_STATES;
+
+	if (reg->country_code == CTRY_DEFAULT) {
+		country = NULL;
+	} else {
+		country = ath_regd_find_country(reg->country_code);
+		if (country == NULL) {
+			printk(KERN_DEBUG
+				"ath: Country is NULL!!!!, cc= %d\n",
+				reg->country_code);
+			return -EINVAL;
+		} else
+			regdmn = country->regDmnEnum;
+	}
+
+	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 detected: 0x%0x\n",
+		reg->regpair->regDmnEnum);
+
+	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;
+	}
+
+	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;
+	}
+
+	return NO_CTL;
+}
+EXPORT_SYMBOL(ath_regd_get_band_ctl);