1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /****************************************************************************** |
3 | |
4 | Copyright(c) 2005 Intel Corporation. All rights reserved. |
5 | |
6 | |
7 | Contact Information: |
8 | Intel Linux Wireless <ilw@linux.intel.com> |
9 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
10 | |
11 | ******************************************************************************/ |
12 | #include <linux/compiler.h> |
13 | #include <linux/errno.h> |
14 | #include <linux/if_arp.h> |
15 | #include <linux/in6.h> |
16 | #include <linux/in.h> |
17 | #include <linux/ip.h> |
18 | #include <linux/kernel.h> |
19 | #include <linux/module.h> |
20 | #include <linux/netdevice.h> |
21 | #include <linux/proc_fs.h> |
22 | #include <linux/skbuff.h> |
23 | #include <linux/tcp.h> |
24 | #include <linux/types.h> |
25 | #include <linux/wireless.h> |
26 | #include <linux/etherdevice.h> |
27 | #include <linux/uaccess.h> |
28 | |
29 | #include "libipw.h" |
30 | |
31 | int libipw_is_valid_channel(struct libipw_device *ieee, u8 channel) |
32 | { |
33 | int i; |
34 | |
35 | /* Driver needs to initialize the geography map before using |
36 | * these helper functions */ |
37 | if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
38 | return 0; |
39 | |
40 | if (ieee->freq_band & LIBIPW_24GHZ_BAND) |
41 | for (i = 0; i < ieee->geo.bg_channels; i++) |
42 | /* NOTE: If G mode is currently supported but |
43 | * this is a B only channel, we don't see it |
44 | * as valid. */ |
45 | if ((ieee->geo.bg[i].channel == channel) && |
46 | !(ieee->geo.bg[i].flags & LIBIPW_CH_INVALID) && |
47 | (!(ieee->mode & IEEE_G) || |
48 | !(ieee->geo.bg[i].flags & LIBIPW_CH_B_ONLY))) |
49 | return LIBIPW_24GHZ_BAND; |
50 | |
51 | if (ieee->freq_band & LIBIPW_52GHZ_BAND) |
52 | for (i = 0; i < ieee->geo.a_channels; i++) |
53 | if ((ieee->geo.a[i].channel == channel) && |
54 | !(ieee->geo.a[i].flags & LIBIPW_CH_INVALID)) |
55 | return LIBIPW_52GHZ_BAND; |
56 | |
57 | return 0; |
58 | } |
59 | |
60 | int libipw_channel_to_index(struct libipw_device *ieee, u8 channel) |
61 | { |
62 | int i; |
63 | |
64 | /* Driver needs to initialize the geography map before using |
65 | * these helper functions */ |
66 | if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
67 | return -1; |
68 | |
69 | if (ieee->freq_band & LIBIPW_24GHZ_BAND) |
70 | for (i = 0; i < ieee->geo.bg_channels; i++) |
71 | if (ieee->geo.bg[i].channel == channel) |
72 | return i; |
73 | |
74 | if (ieee->freq_band & LIBIPW_52GHZ_BAND) |
75 | for (i = 0; i < ieee->geo.a_channels; i++) |
76 | if (ieee->geo.a[i].channel == channel) |
77 | return i; |
78 | |
79 | return -1; |
80 | } |
81 | |
82 | u32 libipw_channel_to_freq(struct libipw_device * ieee, u8 channel) |
83 | { |
84 | const struct libipw_channel * ch; |
85 | |
86 | /* Driver needs to initialize the geography map before using |
87 | * these helper functions */ |
88 | if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
89 | return 0; |
90 | |
91 | ch = libipw_get_channel(ieee, channel); |
92 | if (!ch->channel) |
93 | return 0; |
94 | return ch->freq; |
95 | } |
96 | |
97 | u8 libipw_freq_to_channel(struct libipw_device * ieee, u32 freq) |
98 | { |
99 | int i; |
100 | |
101 | /* Driver needs to initialize the geography map before using |
102 | * these helper functions */ |
103 | if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
104 | return 0; |
105 | |
106 | freq /= 100000; |
107 | |
108 | if (ieee->freq_band & LIBIPW_24GHZ_BAND) |
109 | for (i = 0; i < ieee->geo.bg_channels; i++) |
110 | if (ieee->geo.bg[i].freq == freq) |
111 | return ieee->geo.bg[i].channel; |
112 | |
113 | if (ieee->freq_band & LIBIPW_52GHZ_BAND) |
114 | for (i = 0; i < ieee->geo.a_channels; i++) |
115 | if (ieee->geo.a[i].freq == freq) |
116 | return ieee->geo.a[i].channel; |
117 | |
118 | return 0; |
119 | } |
120 | |
121 | void libipw_set_geo(struct libipw_device *ieee, |
122 | const struct libipw_geo *geo) |
123 | { |
124 | memcpy(ieee->geo.name, geo->name, 3); |
125 | ieee->geo.name[3] = '\0'; |
126 | ieee->geo.bg_channels = geo->bg_channels; |
127 | ieee->geo.a_channels = geo->a_channels; |
128 | memcpy(ieee->geo.bg, geo->bg, geo->bg_channels * |
129 | sizeof(struct libipw_channel)); |
130 | memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels * |
131 | sizeof(struct libipw_channel)); |
132 | } |
133 | |
134 | const struct libipw_geo *libipw_get_geo(struct libipw_device *ieee) |
135 | { |
136 | return &ieee->geo; |
137 | } |
138 | |
139 | u8 libipw_get_channel_flags(struct libipw_device * ieee, u8 channel) |
140 | { |
141 | int index = libipw_channel_to_index(ieee, channel); |
142 | |
143 | if (index == -1) |
144 | return LIBIPW_CH_INVALID; |
145 | |
146 | if (channel <= LIBIPW_24GHZ_CHANNELS) |
147 | return ieee->geo.bg[index].flags; |
148 | |
149 | return ieee->geo.a[index].flags; |
150 | } |
151 | |
152 | static const struct libipw_channel bad_channel = { |
153 | .channel = 0, |
154 | .flags = LIBIPW_CH_INVALID, |
155 | .max_power = 0, |
156 | }; |
157 | |
158 | const struct libipw_channel *libipw_get_channel(struct libipw_device |
159 | *ieee, u8 channel) |
160 | { |
161 | int index = libipw_channel_to_index(ieee, channel); |
162 | |
163 | if (index == -1) |
164 | return &bad_channel; |
165 | |
166 | if (channel <= LIBIPW_24GHZ_CHANNELS) |
167 | return &ieee->geo.bg[index]; |
168 | |
169 | return &ieee->geo.a[index]; |
170 | } |
171 | |
172 | EXPORT_SYMBOL(libipw_get_channel); |
173 | EXPORT_SYMBOL(libipw_get_channel_flags); |
174 | EXPORT_SYMBOL(libipw_is_valid_channel); |
175 | EXPORT_SYMBOL(libipw_freq_to_channel); |
176 | EXPORT_SYMBOL(libipw_channel_to_freq); |
177 | EXPORT_SYMBOL(libipw_channel_to_index); |
178 | EXPORT_SYMBOL(libipw_set_geo); |
179 | EXPORT_SYMBOL(libipw_get_geo); |
180 | |