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

 /*
  * Marvell Wireless LAN device driver: Channel, Frequence and Power
  *
  * Copyright (C) 2011, Marvell International Ltd.
  *
  * This software file (the "File") is distributed by Marvell International
  * Ltd. 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] = { 0x10, 0x20, 0x30,
 						0x32, 0x40, 0x41, 0xff };

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

 /*
  * 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)
 {
 	/*
 	 * For every mcs_rate line, the first 8 bytes are for stream 1x1,
 	 * and all 16 bytes are for stream 2x2.
 	 */
 	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 }
 	};
 	u32 mcs_num_supp =
 		(priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
 	u32 rate;

 	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 maps a data rate value into corresponding index in supported
  * rates table.
  */
 u8 mwifiex_data_rate_to_index(u32 rate)
 {
 	u16 *ptr;

 	if (rate) {
 		ptr = memchr(mwifiex_data_rates, rate,
 				sizeof(mwifiex_data_rates));
 		if (ptr)
 			return (u8) (ptr - mwifiex_data_rates);
 	}
 	return 0;
 }

 /*
  * 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 parameters.
  */
 struct mwifiex_chan_freq_power *
 mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
 						  *priv, u8 band, u16 channel)
 {
 	struct mwifiex_chan_freq_power *cfp = NULL;
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
 	int i;

 	if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 		sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 	else
 		sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];

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

 	for (i = 0; i < sband->n_channels; i++) {
 		ch = &sband->channels[i];
 		if (((ch->hw_value == channel) ||
 			(channel == FIRST_VALID_CHANNEL))
 			&& !(ch->flags & IEEE80211_CHAN_DISABLED)) {
 			priv->cfp.channel = channel;
 			priv->cfp.freq = ch->center_freq;
 			priv->cfp.max_tx_power = ch->max_power;
 			cfp = &priv->cfp;
 			break;
 		}
 	}
 	if (i == sband->n_channels)
 		dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 				" & channel %d\n", __func__, band, channel);

 	return cfp;
 }

 /*
  * This function locates the Channel-Frequency-Power triplet based upon
  * band and frequency parameters.
  */
 struct mwifiex_chan_freq_power *
 mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
 					       u8 band, u32 freq)
 {
 	struct mwifiex_chan_freq_power *cfp = NULL;
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
 	int i;

 	if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
 		sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
 	else
 		sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];

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

 	for (i = 0; i < sband->n_channels; i++) {
 		ch = &sband->channels[i];
 		if ((ch->center_freq == freq) &&
 			!(ch->flags & IEEE80211_CHAN_DISABLED)) {
 			priv->cfp.channel = ch->hw_value;
 			priv->cfp.freq = freq;
 			priv->cfp.max_tx_power = ch->max_power;
 			cfp = &priv->cfp;
 			break;
 		}
 	}
 	if (i == sband->n_channels)
 		dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
 				" & freq %d\n", __func__, band, freq);

 	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 converts rate bitmap into rate index.
  */
 int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
 {
 	int i;

 	for (i = 0; i < size * 8; i++)
 		if (rate_bitmap[i / 16] & (1 << (i % 16)))
 			return i;

 	return 0;
 }

 /*
  * 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) {
 		switch (adapter->config_bands) {
 		case BAND_B:
 			dev_dbg(adapter->dev, "info: infra band=%d "
 				"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:
 			dev_dbg(adapter->dev, "info: infra band=%d "
 				"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_B | BAND_G | BAND_GN:
 			dev_dbg(adapter->dev, "info: infra band=%d "
 				"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:
 			dev_dbg(adapter->dev, "info: infra band=%d "
 				"supported_rates_a\n", adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_a,
 					       sizeof(supported_rates_a));
 			break;
 		case BAND_A | BAND_AN:
 		case BAND_A | BAND_G | BAND_AN | BAND_GN:
 			dev_dbg(adapter->dev, "info: infra band=%d "
 				"supported_rates_a\n", adapter->config_bands);
 			k = mwifiex_copy_rates(rates, k, supported_rates_a,
 					       sizeof(supported_rates_a));
 			break;
 		case BAND_GN:
 			dev_dbg(adapter->dev, "info: infra band=%d "
 				"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:
 			dev_dbg(adapter->dev, "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:
 			dev_dbg(adapter->dev, "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:
 			dev_dbg(adapter->dev, "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:
 			dev_dbg(adapter->dev, "info: adhoc A\n");
 			k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
 					       sizeof(adhoc_rates_a));
 			break;
 		}
 	}

 	return k;
 }
	/*
	* Marvell Wireless LAN device driver: Channel, Frequence and Power
	*
	* Copyright (C) 2011, Marvell International Ltd.
	*
	* This software file (the "File") is distributed by Marvell International
	* Ltd. 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] = { 0x10, 0x20, 0x30,
	0x32, 0x40, 0x41, 0xff };

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

	/*
	* 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)
	{
	/*
	* For every mcs_rate line, the first 8 bytes are for stream 1x1,
	* and all 16 bytes are for stream 2x2.
	*/
	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 }
	};
	u32 mcs_num_supp =
	(priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
	u32 rate;

	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 maps a data rate value into corresponding index in supported
	* rates table.
	*/
	u8 mwifiex_data_rate_to_index(u32 rate)
	{
	u16 *ptr;

	if (rate) {
	ptr = memchr(mwifiex_data_rates, rate,
	sizeof(mwifiex_data_rates));
	if (ptr)
	return (u8) (ptr - mwifiex_data_rates);
	}
	return 0;
	}

	/*
	* 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 parameters.
	*/
	struct mwifiex_chan_freq_power *
	mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
	*priv, u8 band, u16 channel)
	{
	struct mwifiex_chan_freq_power *cfp = NULL;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	int i;

	if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
	sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
	else
	sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];

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

	for (i = 0; i < sband->n_channels; i++) {
	ch = &sband->channels[i];
	if (((ch->hw_value == channel) \|\|
	(channel == FIRST_VALID_CHANNEL))
	&& !(ch->flags & IEEE80211_CHAN_DISABLED)) {
	priv->cfp.channel = channel;
	priv->cfp.freq = ch->center_freq;
	priv->cfp.max_tx_power = ch->max_power;
	cfp = &priv->cfp;
	break;
	}
	}
	if (i == sband->n_channels)
	dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
	" & channel %d\n", __func__, band, channel);

	return cfp;
	}

	/*
	* This function locates the Channel-Frequency-Power triplet based upon
	* band and frequency parameters.
	*/
	struct mwifiex_chan_freq_power *
	mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
	u8 band, u32 freq)
	{
	struct mwifiex_chan_freq_power *cfp = NULL;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	int i;

	if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
	sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
	else
	sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];

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

	for (i = 0; i < sband->n_channels; i++) {
	ch = &sband->channels[i];
	if ((ch->center_freq == freq) &&
	!(ch->flags & IEEE80211_CHAN_DISABLED)) {
	priv->cfp.channel = ch->hw_value;
	priv->cfp.freq = freq;
	priv->cfp.max_tx_power = ch->max_power;
	cfp = &priv->cfp;
	break;
	}
	}
	if (i == sband->n_channels)
	dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
	" & freq %d\n", __func__, band, freq);

	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 converts rate bitmap into rate index.
	*/
	int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
	{
	int i;

	for (i = 0; i < size * 8; i++)
	if (rate_bitmap[i / 16] & (1 << (i % 16)))
	return i;

	return 0;
	}

	/*
	* 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) {
	switch (adapter->config_bands) {
	case BAND_B:
	dev_dbg(adapter->dev, "info: infra band=%d "
	"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:
	dev_dbg(adapter->dev, "info: infra band=%d "
	"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_B \| BAND_G \| BAND_GN:
	dev_dbg(adapter->dev, "info: infra band=%d "
	"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:
	dev_dbg(adapter->dev, "info: infra band=%d "
	"supported_rates_a\n", adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_a,
	sizeof(supported_rates_a));
	break;
	case BAND_A \| BAND_AN:
	case BAND_A \| BAND_G \| BAND_AN \| BAND_GN:
	dev_dbg(adapter->dev, "info: infra band=%d "
	"supported_rates_a\n", adapter->config_bands);
	k = mwifiex_copy_rates(rates, k, supported_rates_a,
	sizeof(supported_rates_a));
	break;
	case BAND_GN:
	dev_dbg(adapter->dev, "info: infra band=%d "
	"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:
	dev_dbg(adapter->dev, "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:
	dev_dbg(adapter->dev, "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:
	dev_dbg(adapter->dev, "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:
	dev_dbg(adapter->dev, "info: adhoc A\n");
	k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
	sizeof(adhoc_rates_a));
	break;
	}
	}

	return k;
	}