libipw_geo.c
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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:
Intel Linux Wireless <ilw@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/tcp.h>
#include <linux/types.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <asm/uaccess.h>
#include "libipw.h"
int libipw_is_valid_channel(struct libipw_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 & LIBIPW_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 & LIBIPW_CH_INVALID) &&
(!(ieee->mode & IEEE_G) ||
!(ieee->geo.bg[i].flags & LIBIPW_CH_B_ONLY)))
return LIBIPW_24GHZ_BAND;
if (ieee->freq_band & LIBIPW_52GHZ_BAND)
for (i = 0; i < ieee->geo.a_channels; i++)
if ((ieee->geo.a[i].channel == channel) &&
!(ieee->geo.a[i].flags & LIBIPW_CH_INVALID))
return LIBIPW_52GHZ_BAND;
return 0;
}
int libipw_channel_to_index(struct libipw_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 & LIBIPW_24GHZ_BAND)
for (i = 0; i < ieee->geo.bg_channels; i++)
if (ieee->geo.bg[i].channel == channel)
return i;
if (ieee->freq_band & LIBIPW_52GHZ_BAND)
for (i = 0; i < ieee->geo.a_channels; i++)
if (ieee->geo.a[i].channel == channel)
return i;
return -1;
}
u32 libipw_channel_to_freq(struct libipw_device * ieee, u8 channel)
{
const struct libipw_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 = libipw_get_channel(ieee, channel);
if (!ch->channel)
return 0;
return ch->freq;
}
u8 libipw_freq_to_channel(struct libipw_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 & LIBIPW_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 & LIBIPW_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;
}
void libipw_set_geo(struct libipw_device *ieee,
const struct libipw_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 libipw_channel));
memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels *
sizeof(struct libipw_channel));
}
const struct libipw_geo *libipw_get_geo(struct libipw_device *ieee)
{
return &ieee->geo;
}
u8 libipw_get_channel_flags(struct libipw_device * ieee, u8 channel)
{
int index = libipw_channel_to_index(ieee, channel);
if (index == -1)
return LIBIPW_CH_INVALID;
if (channel <= LIBIPW_24GHZ_CHANNELS)
return ieee->geo.bg[index].flags;
return ieee->geo.a[index].flags;
}
static const struct libipw_channel bad_channel = {
.channel = 0,
.flags = LIBIPW_CH_INVALID,
.max_power = 0,
};
const struct libipw_channel *libipw_get_channel(struct libipw_device
*ieee, u8 channel)
{
int index = libipw_channel_to_index(ieee, channel);
if (index == -1)
return &bad_channel;
if (channel <= LIBIPW_24GHZ_CHANNELS)
return &ieee->geo.bg[index];
return &ieee->geo.a[index];
}
EXPORT_SYMBOL(libipw_get_channel);
EXPORT_SYMBOL(libipw_get_channel_flags);
EXPORT_SYMBOL(libipw_is_valid_channel);
EXPORT_SYMBOL(libipw_freq_to_channel);
EXPORT_SYMBOL(libipw_channel_to_freq);
EXPORT_SYMBOL(libipw_channel_to_index);
EXPORT_SYMBOL(libipw_set_geo);
EXPORT_SYMBOL(libipw_get_geo);