diff options
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2800lib.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index 7110e1f1e49a..3e059b6c484d 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -2520,6 +2520,27 @@ static int rt2800_get_txpower_bw_comp(struct rt2x00_dev *rt2x00dev, return comp_value; } +static int rt2800_get_txpower_reg_delta(struct rt2x00_dev *rt2x00dev, + int power_level, int max_power) +{ + int delta; + + if (test_bit(CAPABILITY_POWER_LIMIT, &rt2x00dev->cap_flags)) + return 0; + + /* + * XXX: We don't know the maximum transmit power of our hardware since + * the EEPROM doesn't expose it. We only know that we are calibrated + * to 100% tx power. + * + * Hence, we assume the regulatory limit that cfg80211 calulated for + * the current channel is our maximum and if we are requested to lower + * the value we just reduce our tx power accordingly. + */ + delta = power_level - max_power; + return min(delta, 0); +} + static u8 rt2800_compensate_txpower(struct rt2x00_dev *rt2x00dev, int is_rate_b, enum ieee80211_band band, int power_level, u8 txpower, int delta) @@ -2586,6 +2607,12 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, delta += rt2800_get_gain_calibration_delta(rt2x00dev); /* + * Apply regulatory delta. + */ + delta += rt2800_get_txpower_reg_delta(rt2x00dev, power_level, + chan->max_power); + + /* * BBP_R1 controls TX power for all rates, it allow to set the following * gains -12, -6, 0, +6 dBm by setting values 2, 1, 0, 3 respectively. * |