| /* |
| * Wireless utility functions |
| * |
| * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
| */ |
| #include <net/wireless.h> |
| #include <asm/bitops.h> |
| #include "core.h" |
| |
| int ieee80211_channel_to_frequency(int chan) |
| { |
| if (chan < 14) |
| return 2407 + chan * 5; |
| |
| if (chan == 14) |
| return 2484; |
| |
| /* FIXME: 802.11j 17.3.8.3.2 */ |
| return (chan + 1000) * 5; |
| } |
| EXPORT_SYMBOL(ieee80211_channel_to_frequency); |
| |
| int ieee80211_frequency_to_channel(int freq) |
| { |
| if (freq == 2484) |
| return 14; |
| |
| if (freq < 2484) |
| return (freq - 2407) / 5; |
| |
| /* FIXME: 802.11j 17.3.8.3.2 */ |
| return freq/5 - 1000; |
| } |
| EXPORT_SYMBOL(ieee80211_frequency_to_channel); |
| |
| static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
| enum ieee80211_band band) |
| { |
| int i, want; |
| |
| switch (band) { |
| case IEEE80211_BAND_5GHZ: |
| want = 3; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (sband->bitrates[i].bitrate == 60 || |
| sband->bitrates[i].bitrate == 120 || |
| sband->bitrates[i].bitrate == 240) { |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_MANDATORY_A; |
| want--; |
| } |
| } |
| WARN_ON(want); |
| break; |
| case IEEE80211_BAND_2GHZ: |
| want = 7; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (sband->bitrates[i].bitrate == 10) { |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_MANDATORY_B | |
| IEEE80211_RATE_MANDATORY_G; |
| want--; |
| } |
| |
| if (sband->bitrates[i].bitrate == 20 || |
| sband->bitrates[i].bitrate == 55 || |
| sband->bitrates[i].bitrate == 110 || |
| sband->bitrates[i].bitrate == 60 || |
| sband->bitrates[i].bitrate == 120 || |
| sband->bitrates[i].bitrate == 240) { |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_MANDATORY_G; |
| want--; |
| } |
| |
| if (sband->bitrates[i].bitrate == 10 || |
| sband->bitrates[i].bitrate == 20 || |
| sband->bitrates[i].bitrate == 55 || |
| sband->bitrates[i].bitrate == 110) |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_ERP_G; |
| } |
| WARN_ON(want != 0 && want != 6); |
| break; |
| case IEEE80211_NUM_BANDS: |
| WARN_ON(1); |
| break; |
| } |
| } |
| |
| void ieee80211_set_bitrate_flags(struct wiphy *wiphy) |
| { |
| enum ieee80211_band band; |
| |
| for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
| if (wiphy->bands[band]) |
| set_mandatory_flags_band(wiphy->bands[band], band); |
| } |