drivers/net/wireless/brcm80211/brcmsmac/channel.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * Copyright (c) 2010 Broadcom Corporation
  *
  * 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/types.h>
 #include <net/cfg80211.h>
 #include <net/mac80211.h>
 #include <net/regulatory.h>

 #include <defs.h>
 #include "pub.h"
 #include "phy/phy_hal.h"
 #include "main.h"
 #include "stf.h"
 #include "channel.h"
 #include "mac80211_if.h"

 /* QDB() macro takes a dB value and converts to a quarter dB value */
 #define QDB(n) ((n) * BRCMS_TXPWR_DB_FACTOR)

 #define LOCALE_MIMO_IDX_bn		0
 #define LOCALE_MIMO_IDX_11n		0

 /* max of BAND_5G_PWR_LVLS and 14 for 2.4 GHz */
 #define BRCMS_MAXPWR_MIMO_TBL_SIZE	14

 /* maxpwr mapping to 5GHz band channels:
  * maxpwr[0] - channels [34-48]
  * maxpwr[1] - channels [52-60]
  * maxpwr[2] - channels [62-64]
  * maxpwr[3] - channels [100-140]
  * maxpwr[4] - channels [149-165]
  */
 #define BAND_5G_PWR_LVLS	5	/* 5 power levels for 5G */

 #define LC(id)	LOCALE_MIMO_IDX_ ## id

 #define LOCALES(mimo2, mimo5) \
 		{LC(mimo2), LC(mimo5)}

 /* macro to get 5 GHz channel group index for tx power */
 #define CHANNEL_POWER_IDX_5G(c) (((c) < 52) ? 0 : \
 				 (((c) < 62) ? 1 : \
 				 (((c) < 100) ? 2 : \
 				 (((c) < 149) ? 3 : 4))))

 #define BRCM_2GHZ_2412_2462	REG_RULE(2412-10, 2462+10, 40, 0, 19, 0)
 #define BRCM_2GHZ_2467_2472	REG_RULE(2467-10, 2472+10, 20, 0, 19, \
 					 NL80211_RRF_PASSIVE_SCAN | \
 					 NL80211_RRF_NO_IBSS)

 #define BRCM_5GHZ_5180_5240	REG_RULE(5180-10, 5240+10, 40, 0, 21, \
 					 NL80211_RRF_PASSIVE_SCAN | \
 					 NL80211_RRF_NO_IBSS)
 #define BRCM_5GHZ_5260_5320	REG_RULE(5260-10, 5320+10, 40, 0, 21, \
 					 NL80211_RRF_PASSIVE_SCAN | \
 					 NL80211_RRF_DFS | \
 					 NL80211_RRF_NO_IBSS)
 #define BRCM_5GHZ_5500_5700	REG_RULE(5500-10, 5700+10, 40, 0, 21, \
 					 NL80211_RRF_PASSIVE_SCAN | \
 					 NL80211_RRF_DFS | \
 					 NL80211_RRF_NO_IBSS)
 #define BRCM_5GHZ_5745_5825	REG_RULE(5745-10, 5825+10, 40, 0, 21, \
 					 NL80211_RRF_PASSIVE_SCAN | \
 					 NL80211_RRF_NO_IBSS)

 static const struct ieee80211_regdomain brcms_regdom_x2 = {
 	.n_reg_rules = 7,
 	.alpha2 = "X2",
 	.reg_rules = {
 		BRCM_2GHZ_2412_2462,
 		BRCM_2GHZ_2467_2472,
 		BRCM_5GHZ_5180_5240,
 		BRCM_5GHZ_5260_5320,
 		BRCM_5GHZ_5500_5700,
 		BRCM_5GHZ_5745_5825,
 	}
 };

  /* locale per-channel tx power limits for MIMO frames
   * maxpwr arrays are index by channel for 2.4 GHz limits, and
   * by sub-band for 5 GHz limits using CHANNEL_POWER_IDX_5G(channel)
   */
 struct locale_mimo_info {
 	/* tx 20 MHz power limits, qdBm units */
 	s8 maxpwr20[BRCMS_MAXPWR_MIMO_TBL_SIZE];
 	/* tx 40 MHz power limits, qdBm units */
 	s8 maxpwr40[BRCMS_MAXPWR_MIMO_TBL_SIZE];
 };

 /* Country names and abbreviations with locale defined from ISO 3166 */
 struct country_info {
 	const u8 locale_mimo_2G;	/* 2.4G mimo info */
 	const u8 locale_mimo_5G;	/* 5G mimo info */
 };

 struct brcms_regd {
 	struct country_info country;
 	const struct ieee80211_regdomain *regdomain;
 };

 struct brcms_cm_info {
 	struct brcms_pub *pub;
 	struct brcms_c_info *wlc;
 	const struct brcms_regd *world_regd;
 };

 /*
  * MIMO Locale Definitions - 2.4 GHz
  */
 static const struct locale_mimo_info locale_bn = {
 	{QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 	 QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 	 QDB(13), QDB(13), QDB(13)},
 	{0, 0, QDB(13), QDB(13), QDB(13),
 	 QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 	 QDB(13), 0, 0},
 };

 static const struct locale_mimo_info *g_mimo_2g_table[] = {
 	&locale_bn
 };

 /*
  * MIMO Locale Definitions - 5 GHz
  */
 static const struct locale_mimo_info locale_11n = {
 	{ /* 12.5 dBm */ 50, 50, 50, QDB(15), QDB(15)},
 	{QDB(14), QDB(15), QDB(15), QDB(15), QDB(15)},
 };

 static const struct locale_mimo_info *g_mimo_5g_table[] = {
 	&locale_11n
 };

 static const struct brcms_regd cntry_locales[] = {
 	/* Worldwide RoW 2, must always be at index 0 */
 	{
 		.country = LOCALES(bn, 11n),
 		.regdomain = &brcms_regdom_x2,
 	},
 };

 static const struct locale_mimo_info *brcms_c_get_mimo_2g(u8 locale_idx)
 {
 	if (locale_idx >= ARRAY_SIZE(g_mimo_2g_table))
 		return NULL;

 	return g_mimo_2g_table[locale_idx];
 }

 static const struct locale_mimo_info *brcms_c_get_mimo_5g(u8 locale_idx)
 {
 	if (locale_idx >= ARRAY_SIZE(g_mimo_5g_table))
 		return NULL;

 	return g_mimo_5g_table[locale_idx];
 }

 /*
  * Indicates whether the country provided is valid to pass
  * to cfg80211 or not.
  *
  * returns true if valid; false if not.
  */
 static bool brcms_c_country_valid(const char *ccode)
 {
 	/*
 	 * only allow ascii alpha uppercase for the first 2
 	 * chars.
 	 */
 	if (!((0x80 & ccode[0]) == 0 && ccode[0] >= 0x41 && ccode[0] <= 0x5A &&
 	      (0x80 & ccode[1]) == 0 && ccode[1] >= 0x41 && ccode[1] <= 0x5A &&
 	      ccode[2] == '\0'))
 		return false;

 	/*
 	 * do not match ISO 3166-1 user assigned country codes
 	 * that may be in the driver table
 	 */
 	if (!strcmp("AA", ccode) ||        /* AA */
 	    !strcmp("ZZ", ccode) ||        /* ZZ */
 	    ccode[0] == 'X' ||             /* XA - XZ */
 	    (ccode[0] == 'Q' &&            /* QM - QZ */
 	     (ccode[1] >= 'M' && ccode[1] <= 'Z')))
 		return false;

 	if (!strcmp("NA", ccode))
 		return false;

 	return true;
 }

 static const struct brcms_regd *brcms_world_regd(const char *regdom, int len)
 {
 	const struct brcms_regd *regd = NULL;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(cntry_locales); i++) {
 		if (!strncmp(regdom, cntry_locales[i].regdomain->alpha2, len)) {
 			regd = &cntry_locales[i];
 			break;
 		}
 	}

 	return regd;
 }

 static const struct brcms_regd *brcms_default_world_regd(void)
 {
 	return &cntry_locales[0];
 }

 /* JP, J1 - J10 are Japan ccodes */
 static bool brcms_c_japan_ccode(const char *ccode)
 {
 	return (ccode[0] == 'J' &&
 		(ccode[1] == 'P' || (ccode[1] >= '1' && ccode[1] <= '9')));
 }

 static void
 brcms_c_channel_min_txpower_limits_with_local_constraint(
 		struct brcms_cm_info *wlc_cm, struct txpwr_limits *txpwr,
 		u8 local_constraint_qdbm)
 {
 	int j;

 	/* CCK Rates */
 	for (j = 0; j < WL_TX_POWER_CCK_NUM; j++)
 		txpwr->cck[j] = min(txpwr->cck[j], local_constraint_qdbm);

 	/* 20 MHz Legacy OFDM SISO */
 	for (j = 0; j < WL_TX_POWER_OFDM_NUM; j++)
 		txpwr->ofdm[j] = min(txpwr->ofdm[j], local_constraint_qdbm);

 	/* 20 MHz Legacy OFDM CDD */
 	for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
 		txpwr->ofdm_cdd[j] =
 		    min(txpwr->ofdm_cdd[j], local_constraint_qdbm);

 	/* 40 MHz Legacy OFDM SISO */
 	for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
 		txpwr->ofdm_40_siso[j] =
 		    min(txpwr->ofdm_40_siso[j], local_constraint_qdbm);

 	/* 40 MHz Legacy OFDM CDD */
 	for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
 		txpwr->ofdm_40_cdd[j] =
 		    min(txpwr->ofdm_40_cdd[j], local_constraint_qdbm);

 	/* 20MHz MCS 0-7 SISO */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 		txpwr->mcs_20_siso[j] =
 		    min(txpwr->mcs_20_siso[j], local_constraint_qdbm);

 	/* 20MHz MCS 0-7 CDD */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 		txpwr->mcs_20_cdd[j] =
 		    min(txpwr->mcs_20_cdd[j], local_constraint_qdbm);

 	/* 20MHz MCS 0-7 STBC */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 		txpwr->mcs_20_stbc[j] =
 		    min(txpwr->mcs_20_stbc[j], local_constraint_qdbm);

 	/* 20MHz MCS 8-15 MIMO */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
 		txpwr->mcs_20_mimo[j] =
 		    min(txpwr->mcs_20_mimo[j], local_constraint_qdbm);

 	/* 40MHz MCS 0-7 SISO */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 		txpwr->mcs_40_siso[j] =
 		    min(txpwr->mcs_40_siso[j], local_constraint_qdbm);

 	/* 40MHz MCS 0-7 CDD */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 		txpwr->mcs_40_cdd[j] =
 		    min(txpwr->mcs_40_cdd[j], local_constraint_qdbm);

 	/* 40MHz MCS 0-7 STBC */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 		txpwr->mcs_40_stbc[j] =
 		    min(txpwr->mcs_40_stbc[j], local_constraint_qdbm);

 	/* 40MHz MCS 8-15 MIMO */
 	for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
 		txpwr->mcs_40_mimo[j] =
 		    min(txpwr->mcs_40_mimo[j], local_constraint_qdbm);

 	/* 40MHz MCS 32 */
 	txpwr->mcs32 = min(txpwr->mcs32, local_constraint_qdbm);

 }

 /*
  * set the driver's current country and regulatory information
  * using a country code as the source. Look up built in country
  * information found with the country code.
  */
 static void
 brcms_c_set_country(struct brcms_cm_info *wlc_cm,
 		    const struct brcms_regd *regd)
 {
 	struct brcms_c_info *wlc = wlc_cm->wlc;

 	if ((wlc->pub->_n_enab & SUPPORT_11N) !=
 	    wlc->protection->nmode_user)
 		brcms_c_set_nmode(wlc);

 	brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
 	brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);

 	brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);

 	return;
 }

 struct brcms_cm_info *brcms_c_channel_mgr_attach(struct brcms_c_info *wlc)
 {
 	struct brcms_cm_info *wlc_cm;
 	struct brcms_pub *pub = wlc->pub;
 	struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
 	const char *ccode = sprom->alpha2;
 	int ccode_len = sizeof(sprom->alpha2);

 	BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

 	wlc_cm = kzalloc(sizeof(struct brcms_cm_info), GFP_ATOMIC);
 	if (wlc_cm == NULL)
 		return NULL;
 	wlc_cm->pub = pub;
 	wlc_cm->wlc = wlc;
 	wlc->cmi = wlc_cm;

 	/* store the country code for passing up as a regulatory hint */
 	wlc_cm->world_regd = brcms_world_regd(ccode, ccode_len);
 	if (brcms_c_country_valid(ccode))
 		strncpy(wlc->pub->srom_ccode, ccode, ccode_len);

 	/*
 	 * If no custom world domain is found in the SROM, use the
 	 * default "X2" domain.
 	 */
 	if (!wlc_cm->world_regd) {
 		wlc_cm->world_regd = brcms_default_world_regd();
 		ccode = wlc_cm->world_regd->regdomain->alpha2;
 		ccode_len = BRCM_CNTRY_BUF_SZ - 1;
 	}

 	/* save default country for exiting 11d regulatory mode */
 	strncpy(wlc->country_default, ccode, ccode_len);

 	/* initialize autocountry_default to driver default */
 	strncpy(wlc->autocountry_default, ccode, ccode_len);

 	brcms_c_set_country(wlc_cm, wlc_cm->world_regd);

 	return wlc_cm;
 }

 void brcms_c_channel_mgr_detach(struct brcms_cm_info *wlc_cm)
 {
 	kfree(wlc_cm);
 }

 void
 brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
 			 u8 local_constraint_qdbm)
 {
 	struct brcms_c_info *wlc = wlc_cm->wlc;
 	struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
 	const struct ieee80211_reg_rule *reg_rule;
 	struct txpwr_limits txpwr;
 	int ret;

 	brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr);

 	brcms_c_channel_min_txpower_limits_with_local_constraint(
 		wlc_cm, &txpwr, local_constraint_qdbm
 	);

 	/* set or restore gmode as required by regulatory */
 	ret = freq_reg_info(wlc->wiphy, ch->center_freq, 0, &reg_rule);
 	if (!ret && (reg_rule->flags & NL80211_RRF_NO_OFDM))
 		brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false);
 	else
 		brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);

 	brcms_b_set_chanspec(wlc->hw, chanspec,
 			      !!(ch->flags & IEEE80211_CHAN_PASSIVE_SCAN),
 			      &txpwr);
 }

 void
 brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec,
 		       struct txpwr_limits *txpwr)
 {
 	struct brcms_c_info *wlc = wlc_cm->wlc;
 	struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
 	uint i;
 	uint chan;
 	int maxpwr;
 	int delta;
 	const struct country_info *country;
 	struct brcms_band *band;
 	int conducted_max = BRCMS_TXPWR_MAX;
 	const struct locale_mimo_info *li_mimo;
 	int maxpwr20, maxpwr40;
 	int maxpwr_idx;
 	uint j;

 	memset(txpwr, 0, sizeof(struct txpwr_limits));

 	if (WARN_ON(!ch))
 		return;

 	country = &wlc_cm->world_regd->country;

 	chan = CHSPEC_CHANNEL(chanspec);
 	band = wlc->bandstate[chspec_bandunit(chanspec)];
 	li_mimo = (band->bandtype == BRCM_BAND_5G) ?
 	    brcms_c_get_mimo_5g(country->locale_mimo_5G) :
 	    brcms_c_get_mimo_2g(country->locale_mimo_2G);

 	delta = band->antgain;

 	if (band->bandtype == BRCM_BAND_2G)
 		conducted_max = QDB(22);

 	maxpwr = QDB(ch->max_power) - delta;
 	maxpwr = max(maxpwr, 0);
 	maxpwr = min(maxpwr, conducted_max);

 	/* CCK txpwr limits for 2.4G band */
 	if (band->bandtype == BRCM_BAND_2G) {
 		for (i = 0; i < BRCMS_NUM_RATES_CCK; i++)
 			txpwr->cck[i] = (u8) maxpwr;
 	}

 	for (i = 0; i < BRCMS_NUM_RATES_OFDM; i++) {
 		txpwr->ofdm[i] = (u8) maxpwr;

 		/*
 		 * OFDM 40 MHz SISO has the same power as the corresponding
 		 * MCS0-7 rate unless overriden by the locale specific code.
 		 * We set this value to 0 as a flag (presumably 0 dBm isn't
 		 * a possibility) and then copy the MCS0-7 value to the 40 MHz
 		 * value if it wasn't explicitly set.
 		 */
 		txpwr->ofdm_40_siso[i] = 0;

 		txpwr->ofdm_cdd[i] = (u8) maxpwr;

 		txpwr->ofdm_40_cdd[i] = 0;
 	}

 	delta = 0;
 	if (band->antgain > QDB(6))
 		delta = band->antgain - QDB(6);	/* Excess over 6 dB */

 	if (band->bandtype == BRCM_BAND_2G)
 		maxpwr_idx = (chan - 1);
 	else
 		maxpwr_idx = CHANNEL_POWER_IDX_5G(chan);

 	maxpwr20 = li_mimo->maxpwr20[maxpwr_idx];
 	maxpwr40 = li_mimo->maxpwr40[maxpwr_idx];

 	maxpwr20 = maxpwr20 - delta;
 	maxpwr20 = max(maxpwr20, 0);
 	maxpwr40 = maxpwr40 - delta;
 	maxpwr40 = max(maxpwr40, 0);

 	/* Fill in the MCS 0-7 (SISO) rates */
 	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {

 		/*
 		 * 20 MHz has the same power as the corresponding OFDM rate
 		 * unless overriden by the locale specific code.
 		 */
 		txpwr->mcs_20_siso[i] = txpwr->ofdm[i];
 		txpwr->mcs_40_siso[i] = 0;
 	}

 	/* Fill in the MCS 0-7 CDD rates */
 	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 		txpwr->mcs_20_cdd[i] = (u8) maxpwr20;
 		txpwr->mcs_40_cdd[i] = (u8) maxpwr40;
 	}

 	/*
 	 * These locales have SISO expressed in the
 	 * table and override CDD later
 	 */
 	if (li_mimo == &locale_bn) {
 		if (li_mimo == &locale_bn) {
 			maxpwr20 = QDB(16);
 			maxpwr40 = 0;

 			if (chan >= 3 && chan <= 11)
 				maxpwr40 = QDB(16);
 		}

 		for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 			txpwr->mcs_20_siso[i] = (u8) maxpwr20;
 			txpwr->mcs_40_siso[i] = (u8) maxpwr40;
 		}
 	}

 	/* Fill in the MCS 0-7 STBC rates */
 	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 		txpwr->mcs_20_stbc[i] = 0;
 		txpwr->mcs_40_stbc[i] = 0;
 	}

 	/* Fill in the MCS 8-15 SDM rates */
 	for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) {
 		txpwr->mcs_20_mimo[i] = (u8) maxpwr20;
 		txpwr->mcs_40_mimo[i] = (u8) maxpwr40;
 	}

 	/* Fill in MCS32 */
 	txpwr->mcs32 = (u8) maxpwr40;

 	for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 		if (txpwr->ofdm_40_cdd[i] == 0)
 			txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 		if (i == 0) {
 			i = i + 1;
 			if (txpwr->ofdm_40_cdd[i] == 0)
 				txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 		}
 	}

 	/*
 	 * Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO
 	 * value if it wasn't provided explicitly.
 	 */
 	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 		if (txpwr->mcs_40_siso[i] == 0)
 			txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i];
 	}

 	for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 		if (txpwr->ofdm_40_siso[i] == 0)
 			txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 		if (i == 0) {
 			i = i + 1;
 			if (txpwr->ofdm_40_siso[i] == 0)
 				txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 		}
 	}

 	/*
 	 * Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding
 	 * STBC values if they weren't provided explicitly.
 	 */
 	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 		if (txpwr->mcs_20_stbc[i] == 0)
 			txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i];

 		if (txpwr->mcs_40_stbc[i] == 0)
 			txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i];
 	}

 	return;
 }

 /*
  * Verify the chanspec is using a legal set of parameters, i.e. that the
  * chanspec specified a band, bw, ctl_sb and channel and that the
  * combination could be legal given any set of circumstances.
  * RETURNS: true is the chanspec is malformed, false if it looks good.
  */
 static bool brcms_c_chspec_malformed(u16 chanspec)
 {
 	/* must be 2G or 5G band */
 	if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
 		return true;
 	/* must be 20 or 40 bandwidth */
 	if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
 		return true;

 	/* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
 	if (CHSPEC_IS20(chanspec)) {
 		if (!CHSPEC_SB_NONE(chanspec))
 			return true;
 	} else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
 		return true;
 	}

 	return false;
 }

 /*
  * Validate the chanspec for this locale, for 40MHZ we need to also
  * check that the sidebands are valid 20MZH channels in this locale
  * and they are also a legal HT combination
  */
 static bool
 brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec)
 {
 	struct brcms_c_info *wlc = wlc_cm->wlc;
 	u8 channel = CHSPEC_CHANNEL(chspec);

 	/* check the chanspec */
 	if (brcms_c_chspec_malformed(chspec)) {
 		wiphy_err(wlc->wiphy, "wl%d: malformed chanspec 0x%x\n",
 			wlc->pub->unit, chspec);
 		return false;
 	}

 	if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
 	    chspec_bandunit(chspec))
 		return false;

 	return true;
 }

 bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec)
 {
 	return brcms_c_valid_chanspec_ext(wlc_cm, chspec);
 }

 static bool brcms_is_radar_freq(u16 center_freq)
 {
 	return center_freq >= 5260 && center_freq <= 5700;
 }

 static void brcms_reg_apply_radar_flags(struct wiphy *wiphy)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
 	int i;

 	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
 	if (!sband)
 		return;

 	for (i = 0; i < sband->n_channels; i++) {
 		ch = &sband->channels[i];

 		if (!brcms_is_radar_freq(ch->center_freq))
 			continue;

 		/*
 		 * All channels in this range should be passive and have
 		 * DFS enabled.
 		 */
 		if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 			ch->flags |= IEEE80211_CHAN_RADAR |
 				     IEEE80211_CHAN_NO_IBSS |
 				     IEEE80211_CHAN_PASSIVE_SCAN;
 	}
 }

 static void
 brcms_reg_apply_beaconing_flags(struct wiphy *wiphy,
 				enum nl80211_reg_initiator initiator)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
 	const struct ieee80211_reg_rule *rule;
 	int band, i, ret;

 	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 		sband = wiphy->bands[band];
 		if (!sband)
 			continue;

 		for (i = 0; i < sband->n_channels; i++) {
 			ch = &sband->channels[i];

 			if (ch->flags &
 			    (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR))
 				continue;

 			if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 				ret = freq_reg_info(wiphy, ch->center_freq,
 						    0, &rule);
 				if (ret)
 					continue;

 				if (!(rule->flags & NL80211_RRF_NO_IBSS))
 					ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
 				if (!(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);
 			}
 		}
 	}
 }

 static int brcms_reg_notifier(struct wiphy *wiphy,
 			      struct regulatory_request *request)
 {
 	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 	struct brcms_info *wl = hw->priv;
 	struct brcms_c_info *wlc = wl->wlc;
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
 	int band, i;
 	bool ch_found = false;

 	brcms_reg_apply_radar_flags(wiphy);

 	if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
 		brcms_reg_apply_beaconing_flags(wiphy, request->initiator);

 	/* Disable radio if all channels disallowed by regulatory */
 	for (band = 0; !ch_found && band < IEEE80211_NUM_BANDS; band++) {
 		sband = wiphy->bands[band];
 		if (!sband)
 			continue;

 		for (i = 0; !ch_found && i < sband->n_channels; i++) {
 			ch = &sband->channels[i];

 			if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 				ch_found = true;
 		}
 	}

 	if (ch_found) {
 		mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 	} else {
 		mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 		wiphy_err(wlc->wiphy, "wl%d: %s: no valid channel for \"%s\"\n",
 			  wlc->pub->unit, __func__, request->alpha2);
 	}

 	if (wlc->pub->_nbands > 1 || wlc->band->bandtype == BRCM_BAND_2G)
 		wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi,
 					brcms_c_japan_ccode(request->alpha2));

 	return 0;
 }

 void brcms_c_regd_init(struct brcms_c_info *wlc)
 {
 	struct wiphy *wiphy = wlc->wiphy;
 	const struct brcms_regd *regd = wlc->cmi->world_regd;
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
 	struct brcms_chanvec sup_chan;
 	struct brcms_band *band;
 	int band_idx, i;

 	/* Disable any channels not supported by the phy */
 	for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) {
 		band = wlc->bandstate[band_idx];

 		wlc_phy_chanspec_band_validch(band->pi, band->bandtype,
 					      &sup_chan);

 		if (band_idx == BAND_2G_INDEX)
 			sband = wiphy->bands[IEEE80211_BAND_2GHZ];
 		else
 			sband = wiphy->bands[IEEE80211_BAND_5GHZ];

 		for (i = 0; i < sband->n_channels; i++) {
 			ch = &sband->channels[i];
 			if (!isset(sup_chan.vec, ch->hw_value))
 				ch->flags |= IEEE80211_CHAN_DISABLED;
 		}
 	}

 	wlc->wiphy->reg_notifier = brcms_reg_notifier;
 	wlc->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 			     WIPHY_FLAG_STRICT_REGULATORY;
 	wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain);
 	brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER);
 }
	/*
	* Copyright (c) 2010 Broadcom Corporation
	*
	* 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/types.h>
	#include <net/cfg80211.h>
	#include <net/mac80211.h>
	#include <net/regulatory.h>

	#include <defs.h>
	#include "pub.h"
	#include "phy/phy_hal.h"
	#include "main.h"
	#include "stf.h"
	#include "channel.h"
	#include "mac80211_if.h"

	/* QDB() macro takes a dB value and converts to a quarter dB value */
	#define QDB(n) ((n) * BRCMS_TXPWR_DB_FACTOR)

	#define LOCALE_MIMO_IDX_bn 0
	#define LOCALE_MIMO_IDX_11n 0

	/* max of BAND_5G_PWR_LVLS and 14 for 2.4 GHz */
	#define BRCMS_MAXPWR_MIMO_TBL_SIZE 14

	/* maxpwr mapping to 5GHz band channels:
	* maxpwr[0] - channels [34-48]
	* maxpwr[1] - channels [52-60]
	* maxpwr[2] - channels [62-64]
	* maxpwr[3] - channels [100-140]
	* maxpwr[4] - channels [149-165]
	*/
	#define BAND_5G_PWR_LVLS 5 /* 5 power levels for 5G */

	#define LC(id) LOCALE_MIMO_IDX_ ## id

	#define LOCALES(mimo2, mimo5) \
	{LC(mimo2), LC(mimo5)}

	/* macro to get 5 GHz channel group index for tx power */
	#define CHANNEL_POWER_IDX_5G(c) (((c) < 52) ? 0 : \
	(((c) < 62) ? 1 : \
	(((c) < 100) ? 2 : \
	(((c) < 149) ? 3 : 4))))

	#define BRCM_2GHZ_2412_2462 REG_RULE(2412-10, 2462+10, 40, 0, 19, 0)
	#define BRCM_2GHZ_2467_2472 REG_RULE(2467-10, 2472+10, 20, 0, 19, \
	NL80211_RRF_PASSIVE_SCAN \| \
	NL80211_RRF_NO_IBSS)

	#define BRCM_5GHZ_5180_5240 REG_RULE(5180-10, 5240+10, 40, 0, 21, \
	NL80211_RRF_PASSIVE_SCAN \| \
	NL80211_RRF_NO_IBSS)
	#define BRCM_5GHZ_5260_5320 REG_RULE(5260-10, 5320+10, 40, 0, 21, \
	NL80211_RRF_PASSIVE_SCAN \| \
	NL80211_RRF_DFS \| \
	NL80211_RRF_NO_IBSS)
	#define BRCM_5GHZ_5500_5700 REG_RULE(5500-10, 5700+10, 40, 0, 21, \
	NL80211_RRF_PASSIVE_SCAN \| \
	NL80211_RRF_DFS \| \
	NL80211_RRF_NO_IBSS)
	#define BRCM_5GHZ_5745_5825 REG_RULE(5745-10, 5825+10, 40, 0, 21, \
	NL80211_RRF_PASSIVE_SCAN \| \
	NL80211_RRF_NO_IBSS)

	static const struct ieee80211_regdomain brcms_regdom_x2 = {
	.n_reg_rules = 7,
	.alpha2 = "X2",
	.reg_rules = {
	BRCM_2GHZ_2412_2462,
	BRCM_2GHZ_2467_2472,
	BRCM_5GHZ_5180_5240,
	BRCM_5GHZ_5260_5320,
	BRCM_5GHZ_5500_5700,
	BRCM_5GHZ_5745_5825,
	}
	};

	/* locale per-channel tx power limits for MIMO frames
	* maxpwr arrays are index by channel for 2.4 GHz limits, and
	* by sub-band for 5 GHz limits using CHANNEL_POWER_IDX_5G(channel)
	*/
	struct locale_mimo_info {
	/* tx 20 MHz power limits, qdBm units */
	s8 maxpwr20[BRCMS_MAXPWR_MIMO_TBL_SIZE];
	/* tx 40 MHz power limits, qdBm units */
	s8 maxpwr40[BRCMS_MAXPWR_MIMO_TBL_SIZE];
	};

	/* Country names and abbreviations with locale defined from ISO 3166 */
	struct country_info {
	const u8 locale_mimo_2G; /* 2.4G mimo info */
	const u8 locale_mimo_5G; /* 5G mimo info */
	};

	struct brcms_regd {
	struct country_info country;
	const struct ieee80211_regdomain *regdomain;
	};

	struct brcms_cm_info {
	struct brcms_pub *pub;
	struct brcms_c_info *wlc;
	const struct brcms_regd *world_regd;
	};

	/*
	* MIMO Locale Definitions - 2.4 GHz
	*/
	static const struct locale_mimo_info locale_bn = {
	{QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
	QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
	QDB(13), QDB(13), QDB(13)},
	{0, 0, QDB(13), QDB(13), QDB(13),
	QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
	QDB(13), 0, 0},
	};

	static const struct locale_mimo_info *g_mimo_2g_table[] = {
	&locale_bn
	};

	/*
	* MIMO Locale Definitions - 5 GHz
	*/
	static const struct locale_mimo_info locale_11n = {
	{ /* 12.5 dBm */ 50, 50, 50, QDB(15), QDB(15)},
	{QDB(14), QDB(15), QDB(15), QDB(15), QDB(15)},
	};

	static const struct locale_mimo_info *g_mimo_5g_table[] = {
	&locale_11n
	};

	static const struct brcms_regd cntry_locales[] = {
	/* Worldwide RoW 2, must always be at index 0 */
	{
	.country = LOCALES(bn, 11n),
	.regdomain = &brcms_regdom_x2,
	},
	};

	static const struct locale_mimo_info *brcms_c_get_mimo_2g(u8 locale_idx)
	{
	if (locale_idx >= ARRAY_SIZE(g_mimo_2g_table))
	return NULL;

	return g_mimo_2g_table[locale_idx];
	}

	static const struct locale_mimo_info *brcms_c_get_mimo_5g(u8 locale_idx)
	{
	if (locale_idx >= ARRAY_SIZE(g_mimo_5g_table))
	return NULL;

	return g_mimo_5g_table[locale_idx];
	}

	/*
	* Indicates whether the country provided is valid to pass
	* to cfg80211 or not.
	*
	* returns true if valid; false if not.
	*/
	static bool brcms_c_country_valid(const char *ccode)
	{
	/*
	* only allow ascii alpha uppercase for the first 2
	* chars.
	*/
	if (!((0x80 & ccode[0]) == 0 && ccode[0] >= 0x41 && ccode[0] <= 0x5A &&
	(0x80 & ccode[1]) == 0 && ccode[1] >= 0x41 && ccode[1] <= 0x5A &&
	ccode[2] == '\0'))
	return false;

	/*
	* do not match ISO 3166-1 user assigned country codes
	* that may be in the driver table
	*/
	if (!strcmp("AA", ccode) \|\| /* AA */
	!strcmp("ZZ", ccode) \|\| /* ZZ */
	ccode[0] == 'X' \|\| /* XA - XZ */
	(ccode[0] == 'Q' && /* QM - QZ */
	(ccode[1] >= 'M' && ccode[1] <= 'Z')))
	return false;

	if (!strcmp("NA", ccode))
	return false;

	return true;
	}

	static const struct brcms_regd brcms_world_regd(const char regdom, int len)
	{
	const struct brcms_regd *regd = NULL;
	int i;

	for (i = 0; i < ARRAY_SIZE(cntry_locales); i++) {
	if (!strncmp(regdom, cntry_locales[i].regdomain->alpha2, len)) {
	regd = &cntry_locales[i];
	break;
	}
	}

	return regd;
	}

	static const struct brcms_regd *brcms_default_world_regd(void)
	{
	return &cntry_locales[0];
	}

	/* JP, J1 - J10 are Japan ccodes */
	static bool brcms_c_japan_ccode(const char *ccode)
	{
	return (ccode[0] == 'J' &&
	(ccode[1] == 'P' \|\| (ccode[1] >= '1' && ccode[1] <= '9')));
	}

	static void
	brcms_c_channel_min_txpower_limits_with_local_constraint(
	struct brcms_cm_info wlc_cm, struct txpwr_limits txpwr,
	u8 local_constraint_qdbm)
	{
	int j;

	/* CCK Rates */
	for (j = 0; j < WL_TX_POWER_CCK_NUM; j++)
	txpwr->cck[j] = min(txpwr->cck[j], local_constraint_qdbm);

	/* 20 MHz Legacy OFDM SISO */
	for (j = 0; j < WL_TX_POWER_OFDM_NUM; j++)
	txpwr->ofdm[j] = min(txpwr->ofdm[j], local_constraint_qdbm);

	/* 20 MHz Legacy OFDM CDD */
	for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
	txpwr->ofdm_cdd[j] =
	min(txpwr->ofdm_cdd[j], local_constraint_qdbm);

	/* 40 MHz Legacy OFDM SISO */
	for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
	txpwr->ofdm_40_siso[j] =
	min(txpwr->ofdm_40_siso[j], local_constraint_qdbm);

	/* 40 MHz Legacy OFDM CDD */
	for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
	txpwr->ofdm_40_cdd[j] =
	min(txpwr->ofdm_40_cdd[j], local_constraint_qdbm);

	/* 20MHz MCS 0-7 SISO */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
	txpwr->mcs_20_siso[j] =
	min(txpwr->mcs_20_siso[j], local_constraint_qdbm);

	/* 20MHz MCS 0-7 CDD */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
	txpwr->mcs_20_cdd[j] =
	min(txpwr->mcs_20_cdd[j], local_constraint_qdbm);

	/* 20MHz MCS 0-7 STBC */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
	txpwr->mcs_20_stbc[j] =
	min(txpwr->mcs_20_stbc[j], local_constraint_qdbm);

	/* 20MHz MCS 8-15 MIMO */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
	txpwr->mcs_20_mimo[j] =
	min(txpwr->mcs_20_mimo[j], local_constraint_qdbm);

	/* 40MHz MCS 0-7 SISO */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
	txpwr->mcs_40_siso[j] =
	min(txpwr->mcs_40_siso[j], local_constraint_qdbm);

	/* 40MHz MCS 0-7 CDD */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
	txpwr->mcs_40_cdd[j] =
	min(txpwr->mcs_40_cdd[j], local_constraint_qdbm);

	/* 40MHz MCS 0-7 STBC */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
	txpwr->mcs_40_stbc[j] =
	min(txpwr->mcs_40_stbc[j], local_constraint_qdbm);

	/* 40MHz MCS 8-15 MIMO */
	for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
	txpwr->mcs_40_mimo[j] =
	min(txpwr->mcs_40_mimo[j], local_constraint_qdbm);

	/* 40MHz MCS 32 */
	txpwr->mcs32 = min(txpwr->mcs32, local_constraint_qdbm);

	}

	/*
	* set the driver's current country and regulatory information
	* using a country code as the source. Look up built in country
	* information found with the country code.
	*/
	static void
	brcms_c_set_country(struct brcms_cm_info *wlc_cm,
	const struct brcms_regd *regd)
	{
	struct brcms_c_info *wlc = wlc_cm->wlc;

	if ((wlc->pub->_n_enab & SUPPORT_11N) !=
	wlc->protection->nmode_user)
	brcms_c_set_nmode(wlc);

	brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
	brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);

	brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);

	return;
	}

	struct brcms_cm_info brcms_c_channel_mgr_attach(struct brcms_c_info wlc)
	{
	struct brcms_cm_info *wlc_cm;
	struct brcms_pub *pub = wlc->pub;
	struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
	const char *ccode = sprom->alpha2;
	int ccode_len = sizeof(sprom->alpha2);

	BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);

	wlc_cm = kzalloc(sizeof(struct brcms_cm_info), GFP_ATOMIC);
	if (wlc_cm == NULL)
	return NULL;
	wlc_cm->pub = pub;
	wlc_cm->wlc = wlc;
	wlc->cmi = wlc_cm;

	/* store the country code for passing up as a regulatory hint */
	wlc_cm->world_regd = brcms_world_regd(ccode, ccode_len);
	if (brcms_c_country_valid(ccode))
	strncpy(wlc->pub->srom_ccode, ccode, ccode_len);

	/*
	* If no custom world domain is found in the SROM, use the
	* default "X2" domain.
	*/
	if (!wlc_cm->world_regd) {
	wlc_cm->world_regd = brcms_default_world_regd();
	ccode = wlc_cm->world_regd->regdomain->alpha2;
	ccode_len = BRCM_CNTRY_BUF_SZ - 1;
	}

	/* save default country for exiting 11d regulatory mode */
	strncpy(wlc->country_default, ccode, ccode_len);

	/* initialize autocountry_default to driver default */
	strncpy(wlc->autocountry_default, ccode, ccode_len);

	brcms_c_set_country(wlc_cm, wlc_cm->world_regd);

	return wlc_cm;
	}

	void brcms_c_channel_mgr_detach(struct brcms_cm_info *wlc_cm)
	{
	kfree(wlc_cm);
	}

	void
	brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
	u8 local_constraint_qdbm)
	{
	struct brcms_c_info *wlc = wlc_cm->wlc;
	struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
	const struct ieee80211_reg_rule *reg_rule;
	struct txpwr_limits txpwr;
	int ret;

	brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr);

	brcms_c_channel_min_txpower_limits_with_local_constraint(
	wlc_cm, &txpwr, local_constraint_qdbm
	);

	/* set or restore gmode as required by regulatory */
	ret = freq_reg_info(wlc->wiphy, ch->center_freq, 0, &reg_rule);
	if (!ret && (reg_rule->flags & NL80211_RRF_NO_OFDM))
	brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false);
	else
	brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);

	brcms_b_set_chanspec(wlc->hw, chanspec,
	!!(ch->flags & IEEE80211_CHAN_PASSIVE_SCAN),
	&txpwr);
	}

	void
	brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec,
	struct txpwr_limits *txpwr)
	{
	struct brcms_c_info *wlc = wlc_cm->wlc;
	struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
	uint i;
	uint chan;
	int maxpwr;
	int delta;
	const struct country_info *country;
	struct brcms_band *band;
	int conducted_max = BRCMS_TXPWR_MAX;
	const struct locale_mimo_info *li_mimo;
	int maxpwr20, maxpwr40;
	int maxpwr_idx;
	uint j;

	memset(txpwr, 0, sizeof(struct txpwr_limits));

	if (WARN_ON(!ch))
	return;

	country = &wlc_cm->world_regd->country;

	chan = CHSPEC_CHANNEL(chanspec);
	band = wlc->bandstate[chspec_bandunit(chanspec)];
	li_mimo = (band->bandtype == BRCM_BAND_5G) ?
	brcms_c_get_mimo_5g(country->locale_mimo_5G) :
	brcms_c_get_mimo_2g(country->locale_mimo_2G);

	delta = band->antgain;

	if (band->bandtype == BRCM_BAND_2G)
	conducted_max = QDB(22);

	maxpwr = QDB(ch->max_power) - delta;
	maxpwr = max(maxpwr, 0);
	maxpwr = min(maxpwr, conducted_max);

	/* CCK txpwr limits for 2.4G band */
	if (band->bandtype == BRCM_BAND_2G) {
	for (i = 0; i < BRCMS_NUM_RATES_CCK; i++)
	txpwr->cck[i] = (u8) maxpwr;
	}

	for (i = 0; i < BRCMS_NUM_RATES_OFDM; i++) {
	txpwr->ofdm[i] = (u8) maxpwr;

	/*
	* OFDM 40 MHz SISO has the same power as the corresponding
	* MCS0-7 rate unless overriden by the locale specific code.
	* We set this value to 0 as a flag (presumably 0 dBm isn't
	* a possibility) and then copy the MCS0-7 value to the 40 MHz
	* value if it wasn't explicitly set.
	*/
	txpwr->ofdm_40_siso[i] = 0;

	txpwr->ofdm_cdd[i] = (u8) maxpwr;

	txpwr->ofdm_40_cdd[i] = 0;
	}

	delta = 0;
	if (band->antgain > QDB(6))
	delta = band->antgain - QDB(6); /* Excess over 6 dB */

	if (band->bandtype == BRCM_BAND_2G)
	maxpwr_idx = (chan - 1);
	else
	maxpwr_idx = CHANNEL_POWER_IDX_5G(chan);

	maxpwr20 = li_mimo->maxpwr20[maxpwr_idx];
	maxpwr40 = li_mimo->maxpwr40[maxpwr_idx];

	maxpwr20 = maxpwr20 - delta;
	maxpwr20 = max(maxpwr20, 0);
	maxpwr40 = maxpwr40 - delta;
	maxpwr40 = max(maxpwr40, 0);

	/* Fill in the MCS 0-7 (SISO) rates */
	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {

	/*
	* 20 MHz has the same power as the corresponding OFDM rate
	* unless overriden by the locale specific code.
	*/
	txpwr->mcs_20_siso[i] = txpwr->ofdm[i];
	txpwr->mcs_40_siso[i] = 0;
	}

	/* Fill in the MCS 0-7 CDD rates */
	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
	txpwr->mcs_20_cdd[i] = (u8) maxpwr20;
	txpwr->mcs_40_cdd[i] = (u8) maxpwr40;
	}

	/*
	* These locales have SISO expressed in the
	* table and override CDD later
	*/
	if (li_mimo == &locale_bn) {
	if (li_mimo == &locale_bn) {
	maxpwr20 = QDB(16);
	maxpwr40 = 0;

	if (chan >= 3 && chan <= 11)
	maxpwr40 = QDB(16);
	}

	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
	txpwr->mcs_20_siso[i] = (u8) maxpwr20;
	txpwr->mcs_40_siso[i] = (u8) maxpwr40;
	}
	}

	/* Fill in the MCS 0-7 STBC rates */
	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
	txpwr->mcs_20_stbc[i] = 0;
	txpwr->mcs_40_stbc[i] = 0;
	}

	/* Fill in the MCS 8-15 SDM rates */
	for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) {
	txpwr->mcs_20_mimo[i] = (u8) maxpwr20;
	txpwr->mcs_40_mimo[i] = (u8) maxpwr40;
	}

	/* Fill in MCS32 */
	txpwr->mcs32 = (u8) maxpwr40;

	for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
	if (txpwr->ofdm_40_cdd[i] == 0)
	txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
	if (i == 0) {
	i = i + 1;
	if (txpwr->ofdm_40_cdd[i] == 0)
	txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
	}
	}

	/*
	* Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO
	* value if it wasn't provided explicitly.
	*/
	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
	if (txpwr->mcs_40_siso[i] == 0)
	txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i];
	}

	for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
	if (txpwr->ofdm_40_siso[i] == 0)
	txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
	if (i == 0) {
	i = i + 1;
	if (txpwr->ofdm_40_siso[i] == 0)
	txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
	}
	}

	/*
	* Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding
	* STBC values if they weren't provided explicitly.
	*/
	for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
	if (txpwr->mcs_20_stbc[i] == 0)
	txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i];

	if (txpwr->mcs_40_stbc[i] == 0)
	txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i];
	}

	return;
	}

	/*
	* Verify the chanspec is using a legal set of parameters, i.e. that the
	* chanspec specified a band, bw, ctl_sb and channel and that the
	* combination could be legal given any set of circumstances.
	* RETURNS: true is the chanspec is malformed, false if it looks good.
	*/
	static bool brcms_c_chspec_malformed(u16 chanspec)
	{
	/* must be 2G or 5G band */
	if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
	return true;
	/* must be 20 or 40 bandwidth */
	if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
	return true;

	/* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
	if (CHSPEC_IS20(chanspec)) {
	if (!CHSPEC_SB_NONE(chanspec))
	return true;
	} else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
	return true;
	}

	return false;
	}

	/*
	* Validate the chanspec for this locale, for 40MHZ we need to also
	* check that the sidebands are valid 20MZH channels in this locale
	* and they are also a legal HT combination
	*/
	static bool
	brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec)
	{
	struct brcms_c_info *wlc = wlc_cm->wlc;
	u8 channel = CHSPEC_CHANNEL(chspec);

	/* check the chanspec */
	if (brcms_c_chspec_malformed(chspec)) {
	wiphy_err(wlc->wiphy, "wl%d: malformed chanspec 0x%x\n",
	wlc->pub->unit, chspec);
	return false;
	}

	if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
	chspec_bandunit(chspec))
	return false;

	return true;
	}

	bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec)
	{
	return brcms_c_valid_chanspec_ext(wlc_cm, chspec);
	}

	static bool brcms_is_radar_freq(u16 center_freq)
	{
	return center_freq >= 5260 && center_freq <= 5700;
	}

	static void brcms_reg_apply_radar_flags(struct wiphy *wiphy)
	{
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	int i;

	sband = wiphy->bands[IEEE80211_BAND_5GHZ];
	if (!sband)
	return;

	for (i = 0; i < sband->n_channels; i++) {
	ch = &sband->channels[i];

	if (!brcms_is_radar_freq(ch->center_freq))
	continue;

	/*
	* All channels in this range should be passive and have
	* DFS enabled.
	*/
	if (!(ch->flags & IEEE80211_CHAN_DISABLED))
	ch->flags \|= IEEE80211_CHAN_RADAR \|
	IEEE80211_CHAN_NO_IBSS \|
	IEEE80211_CHAN_PASSIVE_SCAN;
	}
	}

	static void
	brcms_reg_apply_beaconing_flags(struct wiphy *wiphy,
	enum nl80211_reg_initiator initiator)
	{
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	const struct ieee80211_reg_rule *rule;
	int band, i, ret;

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
	sband = wiphy->bands[band];
	if (!sband)
	continue;

	for (i = 0; i < sband->n_channels; i++) {
	ch = &sband->channels[i];

	if (ch->flags &
	(IEEE80211_CHAN_DISABLED \| IEEE80211_CHAN_RADAR))
	continue;

	if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
	ret = freq_reg_info(wiphy, ch->center_freq,
	0, &rule);
	if (ret)
	continue;

	if (!(rule->flags & NL80211_RRF_NO_IBSS))
	ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
	if (!(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);
	}
	}
	}
	}

	static int brcms_reg_notifier(struct wiphy *wiphy,
	struct regulatory_request *request)
	{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct brcms_info *wl = hw->priv;
	struct brcms_c_info *wlc = wl->wlc;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	int band, i;
	bool ch_found = false;

	brcms_reg_apply_radar_flags(wiphy);

	if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
	brcms_reg_apply_beaconing_flags(wiphy, request->initiator);

	/* Disable radio if all channels disallowed by regulatory */
	for (band = 0; !ch_found && band < IEEE80211_NUM_BANDS; band++) {
	sband = wiphy->bands[band];
	if (!sband)
	continue;

	for (i = 0; !ch_found && i < sband->n_channels; i++) {
	ch = &sband->channels[i];

	if (!(ch->flags & IEEE80211_CHAN_DISABLED))
	ch_found = true;
	}
	}

	if (ch_found) {
	mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
	} else {
	mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
	wiphy_err(wlc->wiphy, "wl%d: %s: no valid channel for \"%s\"\n",
	wlc->pub->unit, __func__, request->alpha2);
	}

	if (wlc->pub->_nbands > 1 \|\| wlc->band->bandtype == BRCM_BAND_2G)
	wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi,
	brcms_c_japan_ccode(request->alpha2));

	return 0;
	}

	void brcms_c_regd_init(struct brcms_c_info *wlc)
	{
	struct wiphy *wiphy = wlc->wiphy;
	const struct brcms_regd *regd = wlc->cmi->world_regd;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	struct brcms_chanvec sup_chan;
	struct brcms_band *band;
	int band_idx, i;

	/* Disable any channels not supported by the phy */
	for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) {
	band = wlc->bandstate[band_idx];

	wlc_phy_chanspec_band_validch(band->pi, band->bandtype,
	&sup_chan);

	if (band_idx == BAND_2G_INDEX)
	sband = wiphy->bands[IEEE80211_BAND_2GHZ];
	else
	sband = wiphy->bands[IEEE80211_BAND_5GHZ];

	for (i = 0; i < sband->n_channels; i++) {
	ch = &sband->channels[i];
	if (!isset(sup_chan.vec, ch->hw_value))
	ch->flags \|= IEEE80211_CHAN_DISABLED;
	}
	}

	wlc->wiphy->reg_notifier = brcms_reg_notifier;
	wlc->wiphy->flags \|= WIPHY_FLAG_CUSTOM_REGULATORY \|
	WIPHY_FLAG_STRICT_REGULATORY;
	wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain);
	brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER);
	}