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mt76: connac: add support for limiting to maximum regulatory Tx power 

Consider .max_reg_power in struct ieee80211_channel to limit the
maximum power the wireless device allowed to transmit on the
corresponding channel according to the regulatory domain.

Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: YN Chen <YN.Chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
YN Chen 2021-08-05 06:23:00 +08:00 committed by Felix Fietkau
parent 781f62960c
commit f3f1c04536
1 changed files with 41 additions and 2 deletions
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43
drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
View File

@ -1773,6 +1773,43 @@ static s8 mt76_connac_get_sar_power(struct mt76_phy *phy,
return target_power;
}
static s8 mt76_connac_get_ch_power(struct mt76_phy *phy,
struct ieee80211_channel *chan,
s8 target_power)
{
struct mt76_dev *dev = phy->dev;
struct ieee80211_supported_band *sband;
int i;
switch (chan->band) {
case NL80211_BAND_2GHZ:
sband = &phy->sband_2g.sband;
break;
case NL80211_BAND_5GHZ:
sband = &phy->sband_5g.sband;
break;
default:
return target_power;
}
for (i = 0; i < sband->n_channels; i++) {
struct ieee80211_channel *ch = &sband->channels[i];
if (ch->hw_value == chan->hw_value) {
if (!(ch->flags & IEEE80211_CHAN_DISABLED)) {
int power = 2 * ch->max_reg_power;
if (is_mt7663(dev) && (power > 63 || power < -64))
power = 63;
target_power = min_t(s8, power, target_power);
}
break;
}
}
return target_power;
}
static int
mt76_connac_mcu_rate_txpower_band(struct mt76_phy *phy,
enum nl80211_band band)
@ -1840,10 +1877,12 @@ mt76_connac_mcu_rate_txpower_band(struct mt76_phy *phy,
.hw_value = ch_list[idx],
.band = band,
};
s8 sar_power;
s8 reg_power, sar_power;
reg_power = mt76_connac_get_ch_power(phy, &chan,
tx_power);
sar_power = mt76_connac_get_sar_power(phy, &chan,
tx_power);
reg_power);
mt76_get_rate_power_limits(phy, &chan, &limits,
sar_power);