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/******************************************************************************

  Copyright(c) 2005 Intel Corporation. All rights reserved.

  This program is free software; you can redistribute it and/or modify it

  under the terms of version 2 of the GNU General Public License as

  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but WITHOUT

  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

  more details.

  You should have received a copy of the GNU General Public License along with

  this program; if not, write to the Free Software Foundation, Inc., 59

  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  The full GNU General Public License is included in this distribution in the

  file called LICENSE.

  Contact Information:

  James P. Ketrenos <ipw2100-admin@linux.intel.com>

  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

******************************************************************************/

#include <linux/compiler.h>

#include <linux/errno.h>

#include <linux/if_arp.h>

#include <linux/in6.h>

#include <linux/in.h>

#include <linux/ip.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/netdevice.h>

#include <linux/proc_fs.h>

#include <linux/skbuff.h>

#include <linux/slab.h>

#include <linux/tcp.h>

#include <linux/types.h>

#include <linux/wireless.h>

#include <linux/etherdevice.h>

#include <asm/uaccess.h>

#include <net/ieee80211.h>

int ieee80211_is_valid_channel(struct ieee80211_device *ieee, u8 channel)

{

        int i;

        /* Driver needs to initialize the geography map before using

         * these helper functions */

        if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)

                return 0;

        if (ieee->freq_band & IEEE80211_24GHZ_BAND)

                for (i = 0; i < ieee->geo.bg_channels; i++)

                        /* NOTE: If G mode is currently supported but

                         * this is a B only channel, we don't see it

                         * as valid. */

                        if ((ieee->geo.bg[i].channel == channel) &&

                            !(ieee->geo.bg[i].flags & IEEE80211_CH_INVALID) &&

                            (!(ieee->mode & IEEE_G) ||

                             !(ieee->geo.bg[i].flags & IEEE80211_CH_B_ONLY)))

                                return IEEE80211_24GHZ_BAND;

        if (ieee->freq_band & IEEE80211_52GHZ_BAND)

                for (i = 0; i < ieee->geo.a_channels; i++)

                        if ((ieee->geo.a[i].channel == channel) &&

                            !(ieee->geo.a[i].flags & IEEE80211_CH_INVALID))

                                return IEEE80211_52GHZ_BAND;

        return 0;

}

int ieee80211_channel_to_index(struct ieee80211_device *ieee, u8 channel)

{

        int i;

        /* Driver needs to initialize the geography map before using

         * these helper functions */

        if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)

                return -1;

        if (ieee->freq_band & IEEE80211_24GHZ_BAND)

                for (i = 0; i < ieee->geo.bg_channels; i++)

                        if (ieee->geo.bg[i].channel == channel)

                                return i;

        if (ieee->freq_band & IEEE80211_52GHZ_BAND)

                for (i = 0; i < ieee->geo.a_channels; i++)

                        if (ieee->geo.a[i].channel == channel)

                                return i;

        return -1;

}

u32 ieee80211_channel_to_freq(struct ieee80211_device * ieee, u8 channel)

{

        const struct ieee80211_channel * ch;

        /* Driver needs to initialize the geography map before using

         * these helper functions */

        if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)

                return 0;

        ch = ieee80211_get_channel(ieee, channel);

        if (!ch->channel)

                return 0;

        return ch->freq;

}

u8 ieee80211_freq_to_channel(struct ieee80211_device * ieee, u32 freq)

{

        int i;

        /* Driver needs to initialize the geography map before using

         * these helper functions */

        if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)

                return 0;

        freq /= 100000;

        if (ieee->freq_band & IEEE80211_24GHZ_BAND)

                for (i = 0; i < ieee->geo.bg_channels; i++)

                        if (ieee->geo.bg[i].freq == freq)

                                return ieee->geo.bg[i].channel;

        if (ieee->freq_band & IEEE80211_52GHZ_BAND)

                for (i = 0; i < ieee->geo.a_channels; i++)

                        if (ieee->geo.a[i].freq == freq)

                                return ieee->geo.a[i].channel;

        return 0;

}

int ieee80211_set_geo(struct ieee80211_device *ieee,

                      const struct ieee80211_geo *geo)

{

        memcpy(ieee->geo.name, geo->name, 3);

        ieee->geo.name[3] = '\0';

        ieee->geo.bg_channels = geo->bg_channels;

        ieee->geo.a_channels = geo->a_channels;

        memcpy(ieee->geo.bg, geo->bg, geo->bg_channels *

               sizeof(struct ieee80211_channel));

        memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels *

               sizeof(struct ieee80211_channel));

        return 0;

}

const struct ieee80211_geo *ieee80211_get_geo(struct ieee80211_device *ieee)

{

        return &ieee->geo;

}

u8 ieee80211_get_channel_flags(struct ieee80211_device * ieee, u8 channel)

{

        int index = ieee80211_channel_to_index(ieee, channel);

        if (index == -1)

                return IEEE80211_CH_INVALID;

        if (channel <= IEEE80211_24GHZ_CHANNELS)

                return ieee->geo.bg[index].flags;

        return ieee->geo.a[index].flags;

}

static const struct ieee80211_channel bad_channel = {

        .channel = 0,

        .flags = IEEE80211_CH_INVALID,

        .max_power = 0,

};

const struct ieee80211_channel *ieee80211_get_channel(struct ieee80211_device

                                                      *ieee, u8 channel)

{

        int index = ieee80211_channel_to_index(ieee, channel);

        if (index == -1)

                return &bad_channel;

        if (channel <= IEEE80211_24GHZ_CHANNELS)

                return &ieee->geo.bg[index];

        return &ieee->geo.a[index];

}

EXPORT_SYMBOL(ieee80211_get_channel);

EXPORT_SYMBOL(ieee80211_get_channel_flags);

EXPORT_SYMBOL(ieee80211_is_valid_channel);

EXPORT_SYMBOL(ieee80211_freq_to_channel);

EXPORT_SYMBOL(ieee80211_channel_to_freq);

EXPORT_SYMBOL(ieee80211_channel_to_index);

EXPORT_SYMBOL(ieee80211_set_geo);

EXPORT_SYMBOL(ieee80211_get_geo);