diff options
| author | Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de> | 2013-08-28 15:41:29 +0400 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-09-26 15:27:13 +0400 |
| commit | e6b7cde4d3e155f118b81f1f62f86554c529083a (patch) | |
| tree | f7d4b6a41f03d286feb3b1daab02d2e8c8c92bc3 /net/mac80211/util.c | |
| parent | 774f073461dbee0decee7524d9b930a98a3dc30c (diff) | |
| download | linux-e6b7cde4d3e155f118b81f1f62f86554c529083a.tar.xz | |
mac80211: split off channel switch parsing function
The channel switch parsing function can be re-used for the IBSS code,
put the common part into an extra function.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
[also move/rename chandef_downgrade]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/util.c')
| -rw-r--r-- | net/mac80211/util.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 75a16853fb45..3c8283b9b45a 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2292,3 +2292,63 @@ void ieee80211_radar_detected(struct ieee80211_hw *hw) ieee80211_queue_work(hw, &local->radar_detected_work); } EXPORT_SYMBOL(ieee80211_radar_detected); + +u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) +{ + u32 ret; + int tmp; + + switch (c->width) { + case NL80211_CHAN_WIDTH_20: + c->width = NL80211_CHAN_WIDTH_20_NOHT; + ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_40: + c->width = NL80211_CHAN_WIDTH_20; + c->center_freq1 = c->chan->center_freq; + ret = IEEE80211_STA_DISABLE_40MHZ | + IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_80: + tmp = (30 + c->chan->center_freq - c->center_freq1)/20; + /* n_P40 */ + tmp /= 2; + /* freq_P40 */ + c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; + c->width = NL80211_CHAN_WIDTH_40; + ret = IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_80P80: + c->center_freq2 = 0; + c->width = NL80211_CHAN_WIDTH_80; + ret = IEEE80211_STA_DISABLE_80P80MHZ | + IEEE80211_STA_DISABLE_160MHZ; + break; + case NL80211_CHAN_WIDTH_160: + /* n_P20 */ + tmp = (70 + c->chan->center_freq - c->center_freq1)/20; + /* n_P80 */ + tmp /= 4; + c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; + c->width = NL80211_CHAN_WIDTH_80; + ret = IEEE80211_STA_DISABLE_80P80MHZ | + IEEE80211_STA_DISABLE_160MHZ; + break; + default: + case NL80211_CHAN_WIDTH_20_NOHT: + WARN_ON_ONCE(1); + c->width = NL80211_CHAN_WIDTH_20_NOHT; + ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_5: + case NL80211_CHAN_WIDTH_10: + WARN_ON_ONCE(1); + /* keep c->width */ + ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + break; + } + + WARN_ON_ONCE(!cfg80211_chandef_valid(c)); + + return ret; +} |