These utilities include converting op_class to nl80211 channel width and center frequency. Signed-off-by: Michael-CY Lee <michael-cy.lee@xxxxxxxxxxxx> Signed-off-by: Money Wang <money.wang@xxxxxxxxxxxx> --- v2: fix the build warning --- include/net/cfg80211.h | 25 ++++++++ net/wireless/util.c | 127 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 152 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index b137a33a1b68..a226d1cae7f7 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -8669,6 +8669,31 @@ void cfg80211_ch_switch_started_notify(struct net_device *dev, bool ieee80211_operating_class_to_band(u8 operating_class, enum nl80211_band *band); +/** + * ieee80211_operating_class_to_center_freq - convert operating class to + * center frequency + * + * @operating_class: the operating class to convert + * @chan: the ieee80211_channel to convert + * @center_freq1: cneter frequency 1 pointer to fill + * @center_freq2: cneter frequency 2 pointer to fill + * + * Returns %true if the conversion was successful, %false otherwise. + */ +bool ieee80211_operating_class_to_center_freq(u8 operating_class, + struct ieee80211_channel *chan, + u32 *center_freq1, + u32 *center_freq2); + +/** + * ieee80211_operating_class_to_chan_width - convert operating class to + * nl80211 channel width + * + * @operating_class: the operating class to convert + */ +enum nl80211_chan_width +ieee80211_operating_class_to_chan_width(u8 operating_class); + /** * ieee80211_chandef_to_operating_class - convert chandef to operation class * diff --git a/net/wireless/util.c b/net/wireless/util.c index 626b858b4b35..383c9f0897ce 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -2017,6 +2017,133 @@ bool ieee80211_operating_class_to_band(u8 operating_class, } EXPORT_SYMBOL(ieee80211_operating_class_to_band); +bool ieee80211_operating_class_to_center_freq(u8 operating_class, + struct ieee80211_channel *chan, + u32 *center_freq1, + u32 *center_freq2) +{ + u32 control_freq, offset = 0; + enum nl80211_band band; + + control_freq = chan->center_freq; + if (!ieee80211_operating_class_to_band(operating_class, &band)) + return false; + + if (band != chan->band) + return false; + + if (control_freq >= 5955) + offset = control_freq - 5955; + else if (control_freq >= 5745) + offset = control_freq - 5745; + else if (control_freq >= 5180) + offset = control_freq - 5180; + offset /= 20; + + *center_freq2 = 0; + switch (operating_class) { + case 81: /* 2 GHz band; 20 MHz; channels 1..13 */ + case 82: /* 2 GHz band; 20 MHz; channel 14 */ + case 115: /* 5 GHz band; 20 MHz; channels 36,40,44,48 */ + case 118: /* 5 GHz band; 20 MHz; channels 52,56,60,64 */ + case 121: /* 5 GHz band; 20 MHz; channels 100..144 */ + case 124: /* 5 GHz band; 20 MHz; channels 149,153,157,161 */ + case 125: /* 5 GHz band; 20 MHz; channels 149..177 */ + case 131: /* 6 GHz band; 20 MHz; channels 1..233*/ + case 136: /* 6 GHz band; 20 MHz; channel 2 */ + *center_freq1 = control_freq; + return true; + case 83: /* 2 GHz band; 40 MHz; channels 1..9 */ + case 116: /* 5 GHz band; 40 MHz; channels 36,44 */ + case 119: /* 5 GHz band; 40 MHz; channels 52,60 */ + case 122: /* 5 GHz band; 40 MHz; channels 100,108,116,124,132,140 */ + case 126: /* 5 GHz band; 40 MHz; channels 149,157,165,173 */ + *center_freq1 = control_freq + 10; + return true; + case 84: /* 2 GHz band; 40 MHz; channels 5..13 */ + case 117: /* 5 GHz band; 40 MHz; channels 40,48 */ + case 120: /* 5 GHz band; 40 MHz; channels 56,64 */ + case 123: /* 5 GHz band; 40 MHz; channels 104,112,120,128,136,144 */ + case 127: /* 5 GHz band; 40 MHz; channels 153,161,169,177 */ + *center_freq1 = control_freq - 10; + return true; + case 132: /* 6 GHz band; 40 MHz; channels 1,5,..,229*/ + *center_freq1 = control_freq + 10 - (offset & 1) * 20; + return true; + case 128: /* 5 GHz band; 80 MHz; channels 36..64,100..144,149..177 */ + *center_freq1 = control_freq + 30 - (offset & 3) * 20; + return true; + case 130: /* 5 GHz band; 80+80 MHz; channels 36..64,100..144,149..177 */ + /* TODO How to know the center_freq2 of 80+80 MHz?*/ + *center_freq1 = 0; + return false; + case 133: /* 6 GHz band; 80 MHz; channels 1,5,..,229 */ + *center_freq1 = control_freq + 30 - (offset & 3) * 20; + return true; + case 129: /* 5 GHz band; 160 MHz; channels 36..64,100..144,149..177 */ + *center_freq1 = control_freq + 70 - (offset & 7) * 20; + return true; + case 134: /* 6 GHz band; 160 MHz; channels 1,5,..,229 */ + *center_freq1 = control_freq + 70 - (offset & 7) * 20; + return true; + case 135: /* 6 GHz band; 80+80 MHz; channels 1,5,..,229 */ + /* TODO How to know the center_freq2 of 80+80 MHz?*/ + *center_freq1 = 0; + return false; + case 137: /* 6 GHz band; 320 MHz; channels 1,5,..,229 */ + /* TODO it's 320 MHz-1 or 320 MHz-2 channelization? */ + *center_freq1 = 0; + return false; + default: + return false; + } +} +EXPORT_SYMBOL(ieee80211_operating_class_to_center_freq); + +enum nl80211_chan_width +ieee80211_operating_class_to_chan_width(u8 operating_class) +{ + switch (operating_class) { + case 81: /* 2 GHz band; 20 MHz; channels 1..13 */ + case 82: /* 2 GHz band; 20 MHz; channel 14 */ + case 115: /* 5 GHz band; 20 MHz; channels 36,40,44,48 */ + case 118: /* 5 GHz band; 20 MHz; channels 52,56,60,64 */ + case 121: /* 5 GHz band; 20 MHz; channels 100..144 */ + case 124: /* 5 GHz band; 20 MHz; channels 149,153,157,161 */ + case 125: /* 5 GHz band; 20 MHz; channels 149..177 */ + case 131: /* 6 GHz band; 20 MHz; channels 1..233*/ + case 136: /* 6 GHz band; 20 MHz; channel 2 */ + return NL80211_CHAN_WIDTH_20; + case 83: /* 2 GHz band; 40 MHz; channels 1..9 */ + case 84: /* 2 GHz band; 40 MHz; channels 5..13 */ + case 116: /* 5 GHz band; 40 MHz; channels 36,44 */ + case 117: /* 5 GHz band; 40 MHz; channels 40,48 */ + case 119: /* 5 GHz band; 40 MHz; channels 52,60 */ + case 120: /* 5 GHz band; 40 MHz; channels 56,64 */ + case 122: /* 5 GHz band; 40 MHz; channels 100,108,116,124,132,140 */ + case 123: /* 5 GHz band; 40 MHz; channels 104,112,120,128,136,144 */ + case 126: /* 5 GHz band; 40 MHz; channels 149,157,165,173 */ + case 127: /* 5 GHz band; 40 MHz; channels 153,161,169,177 */ + case 132: /* 6 GHz band; 40 MHz; channels 1,5,..,229*/ + return NL80211_CHAN_WIDTH_40; + case 128: /* 5 GHz band; 80 MHz; channels 36..64,100..144,149..177 */ + case 133: /* 6 GHz band; 80 MHz; channels 1,5,..,229 */ + return NL80211_CHAN_WIDTH_80; + case 130: /* 5 GHz band; 80+80 MHz; channels 36..64,100..144,149..177 */ + case 135: /* 6 GHz band; 80+80 MHz; channels 1,5,..,229 */ + return NL80211_CHAN_WIDTH_80P80; + case 129: /* 5 GHz band; 160 MHz; channels 36..64,100..144,149..177 */ + case 134: /* 6 GHz band; 160 MHz; channels 1,5,..,229 */ + return NL80211_CHAN_WIDTH_160; + case 137: /* 6 GHz band; 320 MHz; channels 1,5,..,229 */ + return NL80211_CHAN_WIDTH_320; + default: + WARN_ON(1); + return NL80211_CHAN_WIDTH_20_NOHT; + } +} +EXPORT_SYMBOL(ieee80211_operating_class_to_chan_width); + bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, u8 *op_class) { -- 2.25.1