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cfg80211: add helper functions for start/end freq 

Add helper fuctions for start/end freq.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
wifi-calibration
Janusz Dziedzic 2013-11-05 14:48:47 +01:00 committed by Johannes Berg
parent c17aa52c5b
commit 40d1ba63ff
1 changed files with 30 additions and 14 deletions
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44
net/wireless/chan.c
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@ -277,6 +277,32 @@ void cfg80211_set_dfs_state(struct wiphy *wiphy,
width, dfs_state);
}
static u32 cfg80211_get_start_freq(u32 center_freq,
u32 bandwidth)
{
u32 start_freq;
if (bandwidth <= 20)
start_freq = center_freq;
else
start_freq = center_freq - bandwidth/2 + 10;
return start_freq;
}
static u32 cfg80211_get_end_freq(u32 center_freq,
u32 bandwidth)
{
u32 end_freq;
if (bandwidth <= 20)
end_freq = center_freq;
else
end_freq = center_freq + bandwidth/2 - 10;
return end_freq;
}
static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
u32 center_freq,
u32 bandwidth)
@ -284,13 +310,8 @@ static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
struct ieee80211_channel *c;
u32 freq, start_freq, end_freq;
if (bandwidth <= 20) {
start_freq = center_freq;
end_freq = center_freq;
} else {
start_freq = center_freq - bandwidth/2 + 10;
end_freq = center_freq + bandwidth/2 - 10;
}
start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
for (freq = start_freq; freq <= end_freq; freq += 20) {
c = ieee80211_get_channel(wiphy, freq);
@ -337,13 +358,8 @@ static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy,
struct ieee80211_channel *c;
u32 freq, start_freq, end_freq;
if (bandwidth <= 20) {
start_freq = center_freq;
end_freq = center_freq;
} else {
start_freq = center_freq - bandwidth/2 + 10;
end_freq = center_freq + bandwidth/2 - 10;
}
start_freq = cfg80211_get_start_freq(center_freq, bandwidth);
end_freq = cfg80211_get_end_freq(center_freq, bandwidth);
for (freq = start_freq; freq <= end_freq; freq += 20) {
c = ieee80211_get_channel(wiphy, freq);