projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 8318d78a JB |
1 | /* |
| 2 | * Wireless utility functions | |
| 3 | * | |
| 4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
| 5 | */ | |
| 6 | #include <net/wireless.h> | |
| 7 | #include <asm/bitops.h> | |
| 8 | #include "core.h" | |
| 9 | ||
| 10 | int ieee80211_channel_to_frequency(int chan) | |
| 11 | { | |
| 12 | if (chan < 14) | |
| 13 | return 2407 + chan * 5; | |
| 14 | ||
| 15 | if (chan == 14) | |
| 16 | return 2484; | |
| 17 | ||
| 18 | /* FIXME: 802.11j 17.3.8.3.2 */ | |
| 19 | return (chan + 1000) * 5; | |
| 20 | } | |
| 21 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
| 22 | ||
| 23 | int ieee80211_frequency_to_channel(int freq) | |
| 24 | { | |
| 25 | if (freq == 2484) | |
| 26 | return 14; | |
| 27 | ||
| 28 | if (freq < 2484) | |
| 29 | return (freq - 2407) / 5; | |
| 30 | ||
| 31 | /* FIXME: 802.11j 17.3.8.3.2 */ | |
| 32 | return freq/5 - 1000; | |
| 33 | } | |
| 34 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
| 35 | ||
| 6c507cd0 JB |
36 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
| 37 | int freq) | |
| 906c730a JB |
38 | { |
| 39 | enum ieee80211_band band; | |
| 40 | struct ieee80211_supported_band *sband; | |
| 41 | int i; | |
| 42 | ||
| 43 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
| 44 | sband = wiphy->bands[band]; | |
| 45 | ||
| 46 | if (!sband) | |
| 47 | continue; | |
| 48 | ||
| 49 | for (i = 0; i < sband->n_channels; i++) { | |
| 50 | if (sband->channels[i].center_freq == freq) | |
| 51 | return &sband->channels[i]; | |
| 52 | } | |
| 53 | } | |
| 54 | ||
| 55 | return NULL; | |
| 56 | } | |
| 6c507cd0 | 57 | EXPORT_SYMBOL(__ieee80211_get_channel); |
| 906c730a | 58 | |
| 8318d78a JB |
59 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
| 60 | enum ieee80211_band band) | |
| 61 | { | |
| 62 | int i, want; | |
| 63 | ||
| 64 | switch (band) { | |
| 65 | case IEEE80211_BAND_5GHZ: | |
| 66 | want = 3; | |
| 67 | for (i = 0; i < sband->n_bitrates; i++) { | |
| 68 | if (sband->bitrates[i].bitrate == 60 || | |
| 69 | sband->bitrates[i].bitrate == 120 || | |
| 70 | sband->bitrates[i].bitrate == 240) { | |
| 71 | sband->bitrates[i].flags |= | |
| 72 | IEEE80211_RATE_MANDATORY_A; | |
| 73 | want--; | |
| 74 | } | |
| 75 | } | |
| 76 | WARN_ON(want); | |
| 77 | break; | |
| 78 | case IEEE80211_BAND_2GHZ: | |
| 79 | want = 7; | |
| 80 | for (i = 0; i < sband->n_bitrates; i++) { | |
| 81 | if (sband->bitrates[i].bitrate == 10) { | |
| 82 | sband->bitrates[i].flags |= | |
| 83 | IEEE80211_RATE_MANDATORY_B | | |
| 84 | IEEE80211_RATE_MANDATORY_G; | |
| 85 | want--; | |
| 86 | } | |
| 87 | ||
| 88 | if (sband->bitrates[i].bitrate == 20 || | |
| 89 | sband->bitrates[i].bitrate == 55 || | |
| 90 | sband->bitrates[i].bitrate == 110 || | |
| 91 | sband->bitrates[i].bitrate == 60 || | |
| 92 | sband->bitrates[i].bitrate == 120 || | |
| 93 | sband->bitrates[i].bitrate == 240) { | |
| 94 | sband->bitrates[i].flags |= | |
| 95 | IEEE80211_RATE_MANDATORY_G; | |
| 96 | want--; | |
| 97 | } | |
| 98 | ||
| aac09fbf JB |
99 | if (sband->bitrates[i].bitrate != 10 && |
| 100 | sband->bitrates[i].bitrate != 20 && | |
| 101 | sband->bitrates[i].bitrate != 55 && | |
| 102 | sband->bitrates[i].bitrate != 110) | |
| 8318d78a JB |
103 | sband->bitrates[i].flags |= |
| 104 | IEEE80211_RATE_ERP_G; | |
| 105 | } | |
| 406f2388 | 106 | WARN_ON(want != 0 && want != 3 && want != 6); |
| 8318d78a JB |
107 | break; |
| 108 | case IEEE80211_NUM_BANDS: | |
| 109 | WARN_ON(1); | |
| 110 | break; | |
| 111 | } | |
| 112 | } | |
| 113 | ||
| 114 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
| 115 | { | |
| 116 | enum ieee80211_band band; | |
| 117 | ||
| 118 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
| 119 | if (wiphy->bands[band]) | |
| 120 | set_mandatory_flags_band(wiphy->bands[band], band); | |
| 121 | } |