drivers/net/wireless/marvell/mwifiex/cfp.c - linux - Git at Google

 /*
  * NXP Wireless LAN device driver: Channel, Frequence and Power
  *
  * Copyright 2011-2020 NXP
  *
  * This software file (the "File") is distributed by NXP
  * under the terms of the GNU General Public License Version 2, June 1991
  * (the "License").  You may use, redistribute and/or modify this File in
  * accordance with the terms and conditions of the License, a copy of which
  * is available by writing to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  *
  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  * this warranty disclaimer.
  */

 #include "decl.h"
 #include "ioctl.h"
 #include "util.h"
 #include "fw.h"
 #include "main.h"
 #include "cfg80211.h"

 /* 100mW */
 #define MWIFIEX_TX_PWR_DEFAULT     20
 /* 100mW */
 #define MWIFIEX_TX_PWR_US_DEFAULT      20
 /* 50mW */
 #define MWIFIEX_TX_PWR_JP_DEFAULT      16
 /* 100mW */
 #define MWIFIEX_TX_PWR_FR_100MW        20
 /* 10mW */
 #define MWIFIEX_TX_PWR_FR_10MW         10
 /* 100mW */
 #define MWIFIEX_TX_PWR_EMEA_DEFAULT    20

 static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };

 static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
 					       0xb0, 0x48, 0x60, 0x6c, 0 };

 static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
 						 0x0c, 0x12, 0x18, 0x24,
 						 0x30, 0x48, 0x60, 0x6c, 0 };

 static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
 					       0xb0, 0x48, 0x60, 0x6c, 0 };
 static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
 					0xb0, 0x48, 0x60, 0x6c, 0 };
 static u16 mwifiex_data_rates[MWIFIEX_SUPPORTED_RATES_EXT] = { 0x02, 0x04,
 					0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18,
 					0x24, 0x30, 0x48, 0x60, 0x6C, 0x90,
 					0x0D, 0x1A, 0x27, 0x34, 0x4E, 0x68,
 					0x75, 0x82, 0x0C, 0x1B, 0x36, 0x51,
 					0x6C, 0xA2, 0xD8, 0xF3, 0x10E, 0x00 };

 static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };

 static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
 					0x30, 0x48, 0x60, 0x6c, 0 };

 static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
 					0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
 					0x60, 0x6c, 0 };

 u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x00, 0x10, 0x20, 0x30,
 						0x31, 0x32, 0x40, 0x41, 0x50 };

 static u8 supported_rates_n[N_SUPPORTED_RATES] = { 0x02, 0x04, 0 };

 /* For every mcs_rate line, the first 8 bytes are for stream 1x1,
  * and all 16 bytes are for stream 2x2.
  */
 static const u16 mcs_rate[4][16] = {
 	/* LGI 40M */
 	{ 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
 	  0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },

 	/* SGI 40M */
 	{ 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
 	  0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },

 	/* LGI 20M */
 	{ 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
 	  0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },

 	/* SGI 20M */
 	{ 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
 	  0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
 };

 /* AC rates */
 static const u16 ac_mcs_rate_nss1[8][10] = {
 	/* LG 160M */
 	{ 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
 	  0x492, 0x57C, 0x618 },

 	/* SG 160M */
 	{ 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
 	  0x514, 0x618, 0x6C6 },

 	/* LG 80M */
 	{ 0x3B, 0x75, 0xB0, 0xEA, 0x15F, 0x1D4, 0x20F,
 	  0x249, 0x2BE, 0x30C },

 	/* SG 80M */
 	{ 0x41, 0x82, 0xC3, 0x104, 0x186, 0x208, 0x249,
 	  0x28A, 0x30C, 0x363 },

 	/* LG 40M */
 	{ 0x1B, 0x36, 0x51, 0x6C, 0xA2, 0xD8, 0xF3,
 	  0x10E, 0x144, 0x168 },

 	/* SG 40M */
 	{ 0x1E, 0x3C, 0x5A, 0x78, 0xB4, 0xF0, 0x10E,
 	  0x12C, 0x168, 0x190 },

 	/* LG 20M */
 	{ 0xD, 0x1A, 0x27, 0x34, 0x4E, 0x68, 0x75, 0x82, 0x9C, 0x00 },

 	/* SG 20M */
 	{ 0xF, 0x1D, 0x2C, 0x3A, 0x57, 0x74, 0x82, 0x91, 0xAE, 0x00 },
 };

 /* NSS2 note: the value in the table is 2 multiplier of the actual rate */
 static const u16 ac_mcs_rate_nss2[8][10] = {
 	/* LG 160M */
 	{ 0xEA, 0x1D4, 0x2BE, 0x3A8, 0x57C, 0x750, 0x83A,
 	  0x924, 0xAF8, 0xC30 },

 	/* SG 160M */
 	{ 0x104, 0x208, 0x30C, 0x410, 0x618, 0x820, 0x924,
 	  0xA28, 0xC30, 0xD8B },

 	/* LG 80M */
 	{ 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
 	  0x492, 0x57C, 0x618 },

 	/* SG 80M */
 	{ 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
 	  0x514, 0x618, 0x6C6 },

 	/* LG 40M */
 	{ 0x36, 0x6C, 0xA2, 0xD8, 0x144, 0x1B0, 0x1E6,
 	  0x21C, 0x288, 0x2D0 },

 	/* SG 40M */
 	{ 0x3C, 0x78, 0xB4, 0xF0, 0x168, 0x1E0, 0x21C,
 	  0x258, 0x2D0, 0x320 },

 	/* LG 20M */
 	{ 0x1A, 0x34, 0x4A, 0x68, 0x9C, 0xD0, 0xEA, 0x104,
 	  0x138, 0x00 },

 	/* SG 20M */
 	{ 0x1D, 0x3A, 0x57, 0x74, 0xAE, 0xE6, 0x104, 0x121,
 	  0x15B, 0x00 },
 };

 struct region_code_mapping {
 	u8 code;
 	u8 region[IEEE80211_COUNTRY_STRING_LEN];
 };

 static struct region_code_mapping region_code_mapping_t[] = {
 	{ 0x10, "US " }, /* US FCC */
 	{ 0x20, "CA " }, /* IC Canada */
 	{ 0x30, "FR " }, /* France */
 	{ 0x31, "ES " }, /* Spain */
 	{ 0x32, "FR " }, /* France */
 	{ 0x40, "JP " }, /* Japan */
 	{ 0x41, "JP " }, /* Japan */
 	{ 0x50, "CN " }, /* China */
 };

 /* This function converts integer code to region string */
 u8 *mwifiex_11d_code_2_region(u8 code)
 {
 	u8 i;

 	/* Look for code in mapping table */
 	for (i = 0; i < ARRAY_SIZE(region_code_mapping_t); i++)
 		if (region_code_mapping_t[i].code == code)
 			return region_code_mapping_t[i].region;

 	return NULL;
 }

 /*
  * This function maps an index in supported rates table into
  * the corresponding data rate.
  */
 u32 mwifiex_index_to_acs_data_rate(struct mwifiex_private *priv,
 				   u8 index, u8 ht_info)
 {
 	u32 rate = 0;
 	u8 mcs_index = 0;
 	u8 bw = 0;
 	u8 gi = 0;

 	if ((ht_info & 0x3) == MWIFIEX_RATE_FORMAT_VHT) {
 		mcs_index = min(index & 0xF, 9);

 		/* 20M: bw=0, 40M: bw=1, 80M: bw=2, 160M: bw=3 */
 		bw = (ht_info & 0xC) >> 2;

 		/* LGI: gi =0, SGI: gi = 1 */
 		gi = (ht_info & 0x10) >> 4;

 		if ((index >> 4) == 1)	/* NSS = 2 */
 			rate = ac_mcs_rate_nss2[2 * (3 - bw) + gi][mcs_index];
 		else			/* NSS = 1 */
 			rate = ac_mcs_rate_nss1[2 * (3 - bw) + gi][mcs_index];
 	} else if ((ht_info & 0x3) == MWIFIEX_RATE_FORMAT_HT) {
 		/* 20M: bw=0, 40M: bw=1 */
 		bw = (ht_info & 0xC) >> 2;

 		/* LGI: gi =0, SGI: gi = 1 */
 		gi = (ht_info & 0x10) >> 4;

 		if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 			if (gi == 1)
 				rate = 0x0D;    /* MCS 32 SGI rate */
 			else
 				rate = 0x0C;    /* MCS 32 LGI rate */
 		} else if (index < 16) {
 			if ((bw == 1) || (bw == 0))
 				rate = mcs_rate[2 * (1 - bw) + gi][index];
 			else
 				rate = mwifiex_data_rates[0];
 		} else {
 			rate = mwifiex_data_rates[0];
 		}
 	} else {
 		/* 11n non-HT rates */
 		if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 			index = 0;
 		rate = mwifiex_data_rates[index];
 	}

 	return rate;
 }

 /* This function maps an index in supported rates table into
  * the corresponding data rate.
  */
 u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv,
 			       u8 index, u8 ht_info)
 {
 	u32 mcs_num_supp =
 		(priv->adapter->user_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
 	u32 rate;

 	if (priv->adapter->is_hw_11ac_capable)
 		return mwifiex_index_to_acs_data_rate(priv, index, ht_info);

 	if (ht_info & BIT(0)) {
 		if (index == MWIFIEX_RATE_BITMAP_MCS0) {
 			if (ht_info & BIT(2))
 				rate = 0x0D;	/* MCS 32 SGI rate */
 			else
 				rate = 0x0C;	/* MCS 32 LGI rate */
 		} else if (index < mcs_num_supp) {
 			if (ht_info & BIT(1)) {
 				if (ht_info & BIT(2))
 					/* SGI, 40M */
 					rate = mcs_rate[1][index];
 				else
 					/* LGI, 40M */
 					rate = mcs_rate[0][index];
 			} else {
 				if (ht_info & BIT(2))
 					/* SGI, 20M */
 					rate = mcs_rate[3][index];
 				else
 					/* LGI, 20M */
 					rate = mcs_rate[2][index];
 			}
 		} else
 			rate = mwifiex_data_rates[0];
 	} else {
 		if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
 			index = 0;
 		rate = mwifiex_data_rates[index];
 	}
 	return rate;
 }

 /*
  * This function returns the current active data rates.
  *
  * The result may vary depending upon connection status.
  */
 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
 {
 	if (!priv->media_connected)
 		return mwifiex_get_supported_rates(priv, rates);
 	else
 		return mwifiex_copy_rates(rates, 0,
 					  priv->curr_bss_params.data_rates,
 					  priv->curr_bss_params.num_of_rates);
 }

 /*
  * This function locates the Channel-Frequency-Power triplet based upon
  * band and channel/frequency parameters.
  */
 struct mwifiex_chan_freq_power *
 mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
 {
 	struct mwifiex_chan_freq_power *cfp = NULL;
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch = NULL;
 	int i;

 	if (!channel && !freq)
 		return cfp;

 	if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 		sband = priv->wdev.wiphy->bands[NL80211_BAND_2GHZ];
 	else
 		sband = priv->wdev.wiphy->bands[NL80211_BAND_5GHZ];

 	if (!sband) {
 		mwifiex_dbg(priv->adapter, ERROR,
 			    "%s: cannot find cfp by band %d\n",
 			    __func__, band);
 		return cfp;
 	}

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

 		if (ch->flags & IEEE80211_CHAN_DISABLED)
 			continue;

 		if (freq) {
 			if (ch->center_freq == freq)
 				break;
 		} else {
 			/* find by valid channel*/
 			if (ch->hw_value == channel ||
 			    channel == FIRST_VALID_CHANNEL)
 				break;
 		}
 	}
 	if (i == sband->n_channels) {
 		mwifiex_dbg(priv->adapter, WARN,
 			    "%s: cannot find cfp by band %d\t"
 			    "& channel=%d freq=%d\n",
 			    __func__, band, channel, freq);
 	} else {
 		if (!ch)
 			return cfp;

 		priv->cfp.channel = ch->hw_value;
 		priv->cfp.freq = ch->center_freq;
 		priv->cfp.max_tx_power = ch->max_power;
 		cfp = &priv->cfp;
 	}

 	return cfp;
 }

 /*
  * This function checks if the data rate is set to auto.
  */
 u8
 mwifiex_is_rate_auto(struct mwifiex_private *priv)
 {
 	u32 i;
 	int rate_num = 0;

 	for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
 		if (priv->bitmap_rates[i])
 			rate_num++;

 	if (rate_num > 1)
 		return true;
 	else
 		return false;
 }

 /* This function gets the supported data rates from bitmask inside
  * cfg80211_scan_request.
  */
 u32 mwifiex_get_rates_from_cfg80211(struct mwifiex_private *priv,
 				    u8 *rates, u8 radio_type)
 {
 	struct wiphy *wiphy = priv->adapter->wiphy;
 	struct cfg80211_scan_request *request = priv->scan_request;
 	u32 num_rates, rate_mask;
 	struct ieee80211_supported_band *sband;
 	int i;

 	if (radio_type) {
 		sband = wiphy->bands[NL80211_BAND_5GHZ];
 		if (WARN_ON_ONCE(!sband))
 			return 0;
 		rate_mask = request->rates[NL80211_BAND_5GHZ];
 	} else {
 		sband = wiphy->bands[NL80211_BAND_2GHZ];
 		if (WARN_ON_ONCE(!sband))
 			return 0;
 		rate_mask = request->rates[NL80211_BAND_2GHZ];
 	}

 	num_rates = 0;
 	for (i = 0; i < sband->n_bitrates; i++) {
 		if ((BIT(i) & rate_mask) == 0)
 			continue; /* skip rate */
 		rates[num_rates++] = (u8)(sband->bitrates[i].bitrate / 5);
 	}

 	return num_rates;
 }

 /* This function gets the supported data rates. The function works in
  * both Ad-Hoc and infra mode by printing the band and returning the
  * data rates.
  */
 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
 {
 	u32 k = 0;
 	struct mwifiex_adapter *adapter = priv->adapter;

 	if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 	    priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 		switch (adapter->config_bands) {
 		case BAND_B:
 			mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
 				    "supported_rates_b\n",
 				    adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_b,
 					       sizeof(supported_rates_b));
 			break;
 		case BAND_G:
 		case BAND_G | BAND_GN:
 			mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
 				    "supported_rates_g\n",
 				    adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_g,
 					       sizeof(supported_rates_g));
 			break;
 		case BAND_B | BAND_G:
 		case BAND_A | BAND_B | BAND_G:
 		case BAND_A | BAND_B:
 		case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
 		case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN | BAND_AAC:
 		case BAND_B | BAND_G | BAND_GN:
 			mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
 				    "supported_rates_bg\n",
 				    adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_bg,
 					       sizeof(supported_rates_bg));
 			break;
 		case BAND_A:
 		case BAND_A | BAND_G:
 			mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
 				    "supported_rates_a\n",
 				    adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_a,
 					       sizeof(supported_rates_a));
 			break;
 		case BAND_AN:
 		case BAND_A | BAND_AN:
 		case BAND_A | BAND_AN | BAND_AAC:
 		case BAND_A | BAND_G | BAND_AN | BAND_GN:
 		case BAND_A | BAND_G | BAND_AN | BAND_GN | BAND_AAC:
 			mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
 				    "supported_rates_a\n",
 				    adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_a,
 					       sizeof(supported_rates_a));
 			break;
 		case BAND_GN:
 			mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
 				    "supported_rates_n\n",
 				    adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_n,
 					       sizeof(supported_rates_n));
 			break;
 		}
 	} else {
 		/* Ad-hoc mode */
 		switch (adapter->adhoc_start_band) {
 		case BAND_B:
 			mwifiex_dbg(adapter, INFO, "info: adhoc B\n");
 			k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
 					       sizeof(adhoc_rates_b));
 			break;
 		case BAND_G:
 		case BAND_G | BAND_GN:
 			mwifiex_dbg(adapter, INFO, "info: adhoc G only\n");
 			k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
 					       sizeof(adhoc_rates_g));
 			break;
 		case BAND_B | BAND_G:
 		case BAND_B | BAND_G | BAND_GN:
 			mwifiex_dbg(adapter, INFO, "info: adhoc BG\n");
 			k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
 					       sizeof(adhoc_rates_bg));
 			break;
 		case BAND_A:
 		case BAND_A | BAND_AN:
 			mwifiex_dbg(adapter, INFO, "info: adhoc A\n");
 			k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 					       sizeof(adhoc_rates_a));
 			break;
 		}
 	}

 	return k;
 }

 u8 mwifiex_adjust_data_rate(struct mwifiex_private *priv,
 			    u8 rx_rate, u8 rate_info)
 {
 	u8 rate_index = 0;

 	/* HT40 */
 	if ((rate_info & BIT(0)) && (rate_info & BIT(1)))
 		rate_index = MWIFIEX_RATE_INDEX_MCS0 +
 			     MWIFIEX_BW20_MCS_NUM + rx_rate;
 	else if (rate_info & BIT(0)) /* HT20 */
 		rate_index = MWIFIEX_RATE_INDEX_MCS0 + rx_rate;
 	else
 		rate_index = (rx_rate > MWIFIEX_RATE_INDEX_OFDM0) ?
 			      rx_rate - 1 : rx_rate;

 	if (rate_index >= MWIFIEX_MAX_AC_RX_RATES)
 		rate_index = MWIFIEX_MAX_AC_RX_RATES - 1;

 	return rate_index;
 }
	/*
	* NXP Wireless LAN device driver: Channel, Frequence and Power
	*
	* Copyright 2011-2020 NXP
	*
	* This software file (the "File") is distributed by NXP
	* under the terms of the GNU General Public License Version 2, June 1991
	* (the "License"). You may use, redistribute and/or modify this File in
	* accordance with the terms and conditions of the License, a copy of which
	* is available by writing to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	*
	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	* this warranty disclaimer.
	*/

	#include "decl.h"
	#include "ioctl.h"
	#include "util.h"
	#include "fw.h"
	#include "main.h"
	#include "cfg80211.h"

	/* 100mW */
	#define MWIFIEX_TX_PWR_DEFAULT 20
	/* 100mW */
	#define MWIFIEX_TX_PWR_US_DEFAULT 20
	/* 50mW */
	#define MWIFIEX_TX_PWR_JP_DEFAULT 16
	/* 100mW */
	#define MWIFIEX_TX_PWR_FR_100MW 20
	/* 10mW */
	#define MWIFIEX_TX_PWR_FR_10MW 10
	/* 100mW */
	#define MWIFIEX_TX_PWR_EMEA_DEFAULT 20

	static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };

	static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
	0xb0, 0x48, 0x60, 0x6c, 0 };

	static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
	0x0c, 0x12, 0x18, 0x24,
	0x30, 0x48, 0x60, 0x6c, 0 };

	static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
	0xb0, 0x48, 0x60, 0x6c, 0 };
	static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
	0xb0, 0x48, 0x60, 0x6c, 0 };
	static u16 mwifiex_data_rates[MWIFIEX_SUPPORTED_RATES_EXT] = { 0x02, 0x04,
	0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18,
	0x24, 0x30, 0x48, 0x60, 0x6C, 0x90,
	0x0D, 0x1A, 0x27, 0x34, 0x4E, 0x68,
	0x75, 0x82, 0x0C, 0x1B, 0x36, 0x51,
	0x6C, 0xA2, 0xD8, 0xF3, 0x10E, 0x00 };

	static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };

	static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
	0x30, 0x48, 0x60, 0x6c, 0 };

	static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
	0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
	0x60, 0x6c, 0 };

	u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x00, 0x10, 0x20, 0x30,
	0x31, 0x32, 0x40, 0x41, 0x50 };

	static u8 supported_rates_n[N_SUPPORTED_RATES] = { 0x02, 0x04, 0 };

	/* For every mcs_rate line, the first 8 bytes are for stream 1x1,
	* and all 16 bytes are for stream 2x2.
	*/
	static const u16 mcs_rate[4][16] = {
	/* LGI 40M */
	{ 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
	0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },

	/* SGI 40M */
	{ 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
	0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },

	/* LGI 20M */
	{ 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
	0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },

	/* SGI 20M */
	{ 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
	0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
	};

	/* AC rates */
	static const u16 ac_mcs_rate_nss1[8][10] = {
	/* LG 160M */
	{ 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
	0x492, 0x57C, 0x618 },

	/* SG 160M */
	{ 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
	0x514, 0x618, 0x6C6 },

	/* LG 80M */
	{ 0x3B, 0x75, 0xB0, 0xEA, 0x15F, 0x1D4, 0x20F,
	0x249, 0x2BE, 0x30C },

	/* SG 80M */
	{ 0x41, 0x82, 0xC3, 0x104, 0x186, 0x208, 0x249,
	0x28A, 0x30C, 0x363 },

	/* LG 40M */
	{ 0x1B, 0x36, 0x51, 0x6C, 0xA2, 0xD8, 0xF3,
	0x10E, 0x144, 0x168 },

	/* SG 40M */
	{ 0x1E, 0x3C, 0x5A, 0x78, 0xB4, 0xF0, 0x10E,
	0x12C, 0x168, 0x190 },

	/* LG 20M */
	{ 0xD, 0x1A, 0x27, 0x34, 0x4E, 0x68, 0x75, 0x82, 0x9C, 0x00 },

	/* SG 20M */
	{ 0xF, 0x1D, 0x2C, 0x3A, 0x57, 0x74, 0x82, 0x91, 0xAE, 0x00 },
	};

	/* NSS2 note: the value in the table is 2 multiplier of the actual rate */
	static const u16 ac_mcs_rate_nss2[8][10] = {
	/* LG 160M */
	{ 0xEA, 0x1D4, 0x2BE, 0x3A8, 0x57C, 0x750, 0x83A,
	0x924, 0xAF8, 0xC30 },

	/* SG 160M */
	{ 0x104, 0x208, 0x30C, 0x410, 0x618, 0x820, 0x924,
	0xA28, 0xC30, 0xD8B },

	/* LG 80M */
	{ 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
	0x492, 0x57C, 0x618 },

	/* SG 80M */
	{ 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
	0x514, 0x618, 0x6C6 },

	/* LG 40M */
	{ 0x36, 0x6C, 0xA2, 0xD8, 0x144, 0x1B0, 0x1E6,
	0x21C, 0x288, 0x2D0 },

	/* SG 40M */
	{ 0x3C, 0x78, 0xB4, 0xF0, 0x168, 0x1E0, 0x21C,
	0x258, 0x2D0, 0x320 },

	/* LG 20M */
	{ 0x1A, 0x34, 0x4A, 0x68, 0x9C, 0xD0, 0xEA, 0x104,
	0x138, 0x00 },

	/* SG 20M */
	{ 0x1D, 0x3A, 0x57, 0x74, 0xAE, 0xE6, 0x104, 0x121,
	0x15B, 0x00 },
	};

	struct region_code_mapping {
	u8 code;
	u8 region[IEEE80211_COUNTRY_STRING_LEN];
	};

	static struct region_code_mapping region_code_mapping_t[] = {
	{ 0x10, "US " }, /* US FCC */
	{ 0x20, "CA " }, /* IC Canada */
	{ 0x30, "FR " }, /* France */
	{ 0x31, "ES " }, /* Spain */
	{ 0x32, "FR " }, /* France */
	{ 0x40, "JP " }, /* Japan */
	{ 0x41, "JP " }, /* Japan */
	{ 0x50, "CN " }, /* China */
	};

	/* This function converts integer code to region string */
	u8 *mwifiex_11d_code_2_region(u8 code)
	{
	u8 i;

	/* Look for code in mapping table */
	for (i = 0; i < ARRAY_SIZE(region_code_mapping_t); i++)
	if (region_code_mapping_t[i].code == code)
	return region_code_mapping_t[i].region;

	return NULL;
	}

	/*
	* This function maps an index in supported rates table into
	* the corresponding data rate.
	*/
	u32 mwifiex_index_to_acs_data_rate(struct mwifiex_private *priv,
	u8 index, u8 ht_info)
	{
	u32 rate = 0;
	u8 mcs_index = 0;
	u8 bw = 0;
	u8 gi = 0;

	if ((ht_info & 0x3) == MWIFIEX_RATE_FORMAT_VHT) {
	mcs_index = min(index & 0xF, 9);

	/* 20M: bw=0, 40M: bw=1, 80M: bw=2, 160M: bw=3 */
	bw = (ht_info & 0xC) >> 2;

	/* LGI: gi =0, SGI: gi = 1 */
	gi = (ht_info & 0x10) >> 4;

	if ((index >> 4) == 1) /* NSS = 2 */
	rate = ac_mcs_rate_nss2[2 * (3 - bw) + gi][mcs_index];
	else /* NSS = 1 */
	rate = ac_mcs_rate_nss1[2 * (3 - bw) + gi][mcs_index];
	} else if ((ht_info & 0x3) == MWIFIEX_RATE_FORMAT_HT) {
	/* 20M: bw=0, 40M: bw=1 */
	bw = (ht_info & 0xC) >> 2;

	/* LGI: gi =0, SGI: gi = 1 */
	gi = (ht_info & 0x10) >> 4;

	if (index == MWIFIEX_RATE_BITMAP_MCS0) {
	if (gi == 1)
	rate = 0x0D; /* MCS 32 SGI rate */
	else
	rate = 0x0C; /* MCS 32 LGI rate */
	} else if (index < 16) {
	if ((bw == 1) \|\| (bw == 0))
	rate = mcs_rate[2 * (1 - bw) + gi][index];
	else
	rate = mwifiex_data_rates[0];
	} else {
	rate = mwifiex_data_rates[0];
	}
	} else {
	/* 11n non-HT rates */
	if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
	index = 0;
	rate = mwifiex_data_rates[index];
	}

	return rate;
	}

	/* This function maps an index in supported rates table into
	* the corresponding data rate.
	*/
	u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv,
	u8 index, u8 ht_info)
	{
	u32 mcs_num_supp =
	(priv->adapter->user_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
	u32 rate;

	if (priv->adapter->is_hw_11ac_capable)
	return mwifiex_index_to_acs_data_rate(priv, index, ht_info);

	if (ht_info & BIT(0)) {
	if (index == MWIFIEX_RATE_BITMAP_MCS0) {
	if (ht_info & BIT(2))
	rate = 0x0D; /* MCS 32 SGI rate */
	else
	rate = 0x0C; /* MCS 32 LGI rate */
	} else if (index < mcs_num_supp) {
	if (ht_info & BIT(1)) {
	if (ht_info & BIT(2))
	/* SGI, 40M */
	rate = mcs_rate[1][index];
	else
	/* LGI, 40M */
	rate = mcs_rate[0][index];
	} else {
	if (ht_info & BIT(2))
	/* SGI, 20M */
	rate = mcs_rate[3][index];
	else
	/* LGI, 20M */
	rate = mcs_rate[2][index];
	}
	} else
	rate = mwifiex_data_rates[0];
	} else {
	if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
	index = 0;
	rate = mwifiex_data_rates[index];
	}
	return rate;
	}

	/*
	* This function returns the current active data rates.
	*
	* The result may vary depending upon connection status.
	*/
	u32 mwifiex_get_active_data_rates(struct mwifiex_private priv, u8 rates)
	{
	if (!priv->media_connected)
	return mwifiex_get_supported_rates(priv, rates);
	else
	return mwifiex_copy_rates(rates, 0,
	priv->curr_bss_params.data_rates,
	priv->curr_bss_params.num_of_rates);
	}

	/*
	* This function locates the Channel-Frequency-Power triplet based upon
	* band and channel/frequency parameters.
	*/
	struct mwifiex_chan_freq_power *
	mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
	{
	struct mwifiex_chan_freq_power *cfp = NULL;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch = NULL;
	int i;

	if (!channel && !freq)
	return cfp;

	if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
	sband = priv->wdev.wiphy->bands[NL80211_BAND_2GHZ];
	else
	sband = priv->wdev.wiphy->bands[NL80211_BAND_5GHZ];

	if (!sband) {
	mwifiex_dbg(priv->adapter, ERROR,
	"%s: cannot find cfp by band %d\n",
	__func__, band);
	return cfp;
	}

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

	if (ch->flags & IEEE80211_CHAN_DISABLED)
	continue;

	if (freq) {
	if (ch->center_freq == freq)
	break;
	} else {
	/* find by valid channel*/
	if (ch->hw_value == channel \|\|
	channel == FIRST_VALID_CHANNEL)
	break;
	}
	}
	if (i == sband->n_channels) {
	mwifiex_dbg(priv->adapter, WARN,
	"%s: cannot find cfp by band %d\t"
	"& channel=%d freq=%d\n",
	__func__, band, channel, freq);
	} else {
	if (!ch)
	return cfp;

	priv->cfp.channel = ch->hw_value;
	priv->cfp.freq = ch->center_freq;
	priv->cfp.max_tx_power = ch->max_power;
	cfp = &priv->cfp;
	}

	return cfp;
	}

	/*
	* This function checks if the data rate is set to auto.
	*/
	u8
	mwifiex_is_rate_auto(struct mwifiex_private *priv)
	{
	u32 i;
	int rate_num = 0;

	for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
	if (priv->bitmap_rates[i])
	rate_num++;

	if (rate_num > 1)
	return true;
	else
	return false;
	}

	/* This function gets the supported data rates from bitmask inside
	* cfg80211_scan_request.
	*/
	u32 mwifiex_get_rates_from_cfg80211(struct mwifiex_private *priv,
	u8 *rates, u8 radio_type)
	{
	struct wiphy *wiphy = priv->adapter->wiphy;
	struct cfg80211_scan_request *request = priv->scan_request;
	u32 num_rates, rate_mask;
	struct ieee80211_supported_band *sband;
	int i;

	if (radio_type) {
	sband = wiphy->bands[NL80211_BAND_5GHZ];
	if (WARN_ON_ONCE(!sband))
	return 0;
	rate_mask = request->rates[NL80211_BAND_5GHZ];
	} else {
	sband = wiphy->bands[NL80211_BAND_2GHZ];
	if (WARN_ON_ONCE(!sband))
	return 0;
	rate_mask = request->rates[NL80211_BAND_2GHZ];
	}

	num_rates = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
	if ((BIT(i) & rate_mask) == 0)
	continue; /* skip rate */
	rates[num_rates++] = (u8)(sband->bitrates[i].bitrate / 5);
	}

	return num_rates;
	}

	/* This function gets the supported data rates. The function works in
	* both Ad-Hoc and infra mode by printing the band and returning the
	* data rates.
	*/
	u32 mwifiex_get_supported_rates(struct mwifiex_private priv, u8 rates)
	{
	u32 k = 0;
	struct mwifiex_adapter *adapter = priv->adapter;

	if (priv->bss_mode == NL80211_IFTYPE_STATION \|\|
	priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
	switch (adapter->config_bands) {
	case BAND_B:
	mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
	"supported_rates_b\n",
	adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_b,
	sizeof(supported_rates_b));
	break;
	case BAND_G:
	case BAND_G \| BAND_GN:
	mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
	"supported_rates_g\n",
	adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_g,
	sizeof(supported_rates_g));
	break;
	case BAND_B \| BAND_G:
	case BAND_A \| BAND_B \| BAND_G:
	case BAND_A \| BAND_B:
	case BAND_A \| BAND_B \| BAND_G \| BAND_GN \| BAND_AN:
	case BAND_A \| BAND_B \| BAND_G \| BAND_GN \| BAND_AN \| BAND_AAC:
	case BAND_B \| BAND_G \| BAND_GN:
	mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
	"supported_rates_bg\n",
	adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_bg,
	sizeof(supported_rates_bg));
	break;
	case BAND_A:
	case BAND_A \| BAND_G:
	mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
	"supported_rates_a\n",
	adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_a,
	sizeof(supported_rates_a));
	break;
	case BAND_AN:
	case BAND_A \| BAND_AN:
	case BAND_A \| BAND_AN \| BAND_AAC:
	case BAND_A \| BAND_G \| BAND_AN \| BAND_GN:
	case BAND_A \| BAND_G \| BAND_AN \| BAND_GN \| BAND_AAC:
	mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
	"supported_rates_a\n",
	adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_a,
	sizeof(supported_rates_a));
	break;
	case BAND_GN:
	mwifiex_dbg(adapter, INFO, "info: infra band=%d\t"
	"supported_rates_n\n",
	adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_n,
	sizeof(supported_rates_n));
	break;
	}
	} else {
	/* Ad-hoc mode */
	switch (adapter->adhoc_start_band) {
	case BAND_B:
	mwifiex_dbg(adapter, INFO, "info: adhoc B\n");
	k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
	sizeof(adhoc_rates_b));
	break;
	case BAND_G:
	case BAND_G \| BAND_GN:
	mwifiex_dbg(adapter, INFO, "info: adhoc G only\n");
	k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
	sizeof(adhoc_rates_g));
	break;
	case BAND_B \| BAND_G:
	case BAND_B \| BAND_G \| BAND_GN:
	mwifiex_dbg(adapter, INFO, "info: adhoc BG\n");
	k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
	sizeof(adhoc_rates_bg));
	break;
	case BAND_A:
	case BAND_A \| BAND_AN:
	mwifiex_dbg(adapter, INFO, "info: adhoc A\n");
	k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
	sizeof(adhoc_rates_a));
	break;
	}
	}

	return k;
	}

	u8 mwifiex_adjust_data_rate(struct mwifiex_private *priv,
	u8 rx_rate, u8 rate_info)
	{
	u8 rate_index = 0;

	/* HT40 */
	if ((rate_info & BIT(0)) && (rate_info & BIT(1)))
	rate_index = MWIFIEX_RATE_INDEX_MCS0 +
	MWIFIEX_BW20_MCS_NUM + rx_rate;
	else if (rate_info & BIT(0)) /* HT20 */
	rate_index = MWIFIEX_RATE_INDEX_MCS0 + rx_rate;
	else
	rate_index = (rx_rate > MWIFIEX_RATE_INDEX_OFDM0) ?
	rx_rate - 1 : rx_rate;

	if (rate_index >= MWIFIEX_MAX_AC_RX_RATES)
	rate_index = MWIFIEX_MAX_AC_RX_RATES - 1;

	return rate_index;
	}