[deliverable/linux.git] / drivers / net / wireless / ipw2x00 / libipw_geo.c

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

  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);
Commit	Line	Data
	1	/******************************************************************************
	2
	3	Copyright(c) 2005 Intel Corporation. All rights reserved.
	4
	5	This program is free software; you can redistribute it and/or modify it
	6	under the terms of version 2 of the GNU General Public License as
	7	published by the Free Software Foundation.
	8
	9	This program is distributed in the hope that it will be useful, but WITHOUT
	10	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	more details.
	13
	14	You should have received a copy of the GNU General Public License along with
	15	this program; if not, write to the Free Software Foundation, Inc., 59
	16	Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17
	18	The full GNU General Public License is included in this distribution in the
	19	file called LICENSE.
	20
	21	Contact Information:
	22	Intel Linux Wireless <ilw@linux.intel.com>
	23	Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	24
	25	******************************************************************************/
	26	#include <linux/compiler.h>
	27	#include <linux/errno.h>
	28	#include <linux/if_arp.h>
	29	#include <linux/in6.h>
	30	#include <linux/in.h>
	31	#include <linux/ip.h>
	32	#include <linux/kernel.h>
	33	#include <linux/module.h>
	34	#include <linux/netdevice.h>
	35	#include <linux/proc_fs.h>
	36	#include <linux/skbuff.h>
	37	#include <linux/tcp.h>
	38	#include <linux/types.h>
	39	#include <linux/wireless.h>
	40	#include <linux/etherdevice.h>
	41	#include <asm/uaccess.h>
	42
	43	#include "libipw.h"
	44
	45	int libipw_is_valid_channel(struct libipw_device *ieee, u8 channel)
	46	{
	47	int i;
	48
	49	/* Driver needs to initialize the geography map before using
	50	* these helper functions */
	51	if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
	52	return 0;
	53
	54	if (ieee->freq_band & LIBIPW_24GHZ_BAND)
	55	for (i = 0; i < ieee->geo.bg_channels; i++)
	56	/* NOTE: If G mode is currently supported but
	57	* this is a B only channel, we don't see it
	58	* as valid. */
	59	if ((ieee->geo.bg[i].channel == channel) &&
	60	!(ieee->geo.bg[i].flags & LIBIPW_CH_INVALID) &&
	61	(!(ieee->mode & IEEE_G) \|\|
	62	!(ieee->geo.bg[i].flags & LIBIPW_CH_B_ONLY)))
	63	return LIBIPW_24GHZ_BAND;
	64
	65	if (ieee->freq_band & LIBIPW_52GHZ_BAND)
	66	for (i = 0; i < ieee->geo.a_channels; i++)
	67	if ((ieee->geo.a[i].channel == channel) &&
	68	!(ieee->geo.a[i].flags & LIBIPW_CH_INVALID))
	69	return LIBIPW_52GHZ_BAND;
	70
	71	return 0;
	72	}
	73
	74	int libipw_channel_to_index(struct libipw_device *ieee, u8 channel)
	75	{
	76	int i;
	77
	78	/* Driver needs to initialize the geography map before using
	79	* these helper functions */
	80	if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
	81	return -1;
	82
	83	if (ieee->freq_band & LIBIPW_24GHZ_BAND)
	84	for (i = 0; i < ieee->geo.bg_channels; i++)
	85	if (ieee->geo.bg[i].channel == channel)
	86	return i;
	87
	88	if (ieee->freq_band & LIBIPW_52GHZ_BAND)
	89	for (i = 0; i < ieee->geo.a_channels; i++)
	90	if (ieee->geo.a[i].channel == channel)
	91	return i;
	92
	93	return -1;
	94	}
	95
	96	u32 libipw_channel_to_freq(struct libipw_device * ieee, u8 channel)
	97	{
	98	const struct libipw_channel * ch;
	99
	100	/* Driver needs to initialize the geography map before using
	101	* these helper functions */
	102	if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
	103	return 0;
	104
	105	ch = libipw_get_channel(ieee, channel);
	106	if (!ch->channel)
	107	return 0;
	108	return ch->freq;
	109	}
	110
	111	u8 libipw_freq_to_channel(struct libipw_device * ieee, u32 freq)
	112	{
	113	int i;
	114
	115	/* Driver needs to initialize the geography map before using
	116	* these helper functions */
	117	if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
	118	return 0;
	119
	120	freq /= 100000;
	121
	122	if (ieee->freq_band & LIBIPW_24GHZ_BAND)
	123	for (i = 0; i < ieee->geo.bg_channels; i++)
	124	if (ieee->geo.bg[i].freq == freq)
	125	return ieee->geo.bg[i].channel;
	126
	127	if (ieee->freq_band & LIBIPW_52GHZ_BAND)
	128	for (i = 0; i < ieee->geo.a_channels; i++)
	129	if (ieee->geo.a[i].freq == freq)
	130	return ieee->geo.a[i].channel;
	131
	132	return 0;
	133	}
	134
	135	void libipw_set_geo(struct libipw_device *ieee,
	136	const struct libipw_geo *geo)
	137	{
	138	memcpy(ieee->geo.name, geo->name, 3);
	139	ieee->geo.name[3] = '\0';
	140	ieee->geo.bg_channels = geo->bg_channels;
	141	ieee->geo.a_channels = geo->a_channels;
	142	memcpy(ieee->geo.bg, geo->bg, geo->bg_channels *
	143	sizeof(struct libipw_channel));
	144	memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels *
	145	sizeof(struct libipw_channel));
	146	}
	147
	148	const struct libipw_geo libipw_get_geo(struct libipw_device ieee)
	149	{
	150	return &ieee->geo;
	151	}
	152
	153	u8 libipw_get_channel_flags(struct libipw_device * ieee, u8 channel)
	154	{
	155	int index = libipw_channel_to_index(ieee, channel);
	156
	157	if (index == -1)
	158	return LIBIPW_CH_INVALID;
	159
	160	if (channel <= LIBIPW_24GHZ_CHANNELS)
	161	return ieee->geo.bg[index].flags;
	162
	163	return ieee->geo.a[index].flags;
	164	}
	165
	166	static const struct libipw_channel bad_channel = {
	167	.channel = 0,
	168	.flags = LIBIPW_CH_INVALID,
	169	.max_power = 0,
	170	};
	171
	172	const struct libipw_channel *libipw_get_channel(struct libipw_device
	173	*ieee, u8 channel)
	174	{
	175	int index = libipw_channel_to_index(ieee, channel);
	176
	177	if (index == -1)
	178	return &bad_channel;
	179
	180	if (channel <= LIBIPW_24GHZ_CHANNELS)
	181	return &ieee->geo.bg[index];
	182
	183	return &ieee->geo.a[index];
	184	}
	185
	186	EXPORT_SYMBOL(libipw_get_channel);
	187	EXPORT_SYMBOL(libipw_get_channel_flags);
	188	EXPORT_SYMBOL(libipw_is_valid_channel);
	189	EXPORT_SYMBOL(libipw_freq_to_channel);
	190	EXPORT_SYMBOL(libipw_channel_to_freq);
	191	EXPORT_SYMBOL(libipw_channel_to_index);
	192	EXPORT_SYMBOL(libipw_set_geo);
	193	EXPORT_SYMBOL(libipw_get_geo);