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
45int 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
74int 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
96u32 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
111u8 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
135void 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
148const struct libipw_geo *libipw_get_geo(struct libipw_device *ieee)
149{
150	return &ieee->geo;
151}
152
153u8 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
166static const struct libipw_channel bad_channel = {
167	.channel = 0,
168	.flags = LIBIPW_CH_INVALID,
169	.max_power = 0,
170};
171
172const 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
186EXPORT_SYMBOL(libipw_get_channel);
187EXPORT_SYMBOL(libipw_get_channel_flags);
188EXPORT_SYMBOL(libipw_is_valid_channel);
189EXPORT_SYMBOL(libipw_freq_to_channel);
190EXPORT_SYMBOL(libipw_channel_to_freq);
191EXPORT_SYMBOL(libipw_channel_to_index);
192EXPORT_SYMBOL(libipw_set_geo);
193EXPORT_SYMBOL(libipw_get_geo);
194