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authorLorenzo Bianconi <lorenzo.bianconi@redhat.com>2018-10-12 12:16:27 +0200
committerFelix Fietkau <nbd@nbd.name>2018-10-13 17:39:52 +0200
commit4636a2544c3b79b95115bd612455de7c176dadcf (patch)
treed97e242bba6ea490436747a7761032056406f3ee /drivers
parente48797e9b6810383badfec429904a369c3e830da (diff)
mt76x0: phy: align channel gain logic to mt76x2 one
Update vga tuning algorithm to the one used in mt76x2 driver Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt76x0/phy.c56
1 files changed, 39 insertions, 17 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
index 7d29fd16342a..3d0fcf8c34b4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -719,6 +719,7 @@ int mt76x0_phy_set_channel(struct mt76x02_dev *dev,
mt76x0_read_rx_gain(dev);
mt76x0_phy_set_chan_bbp_params(dev, rf_bw_band);
+ mt76x02_init_agc_gain(dev);
if (mt76_is_usb(dev)) {
mt76x0_vco_cal(dev, channel);
@@ -820,23 +821,44 @@ done:
rf_wr(dev, MT_RF(0, 67), rf_b0_67);
}
-static void mt76x0_dynamic_vga_tuning(struct mt76x02_dev *dev)
+static void mt76x0_phy_set_gain_val(struct mt76x02_dev *dev)
{
- struct cfg80211_chan_def *chandef = &dev->mt76.chandef;
- u32 val, init_vga;
- int avg_rssi;
-
- init_vga = chandef->chan->band == NL80211_BAND_5GHZ ? 0x54 : 0x4E;
- avg_rssi = mt76x02_phy_get_min_avg_rssi(dev);
- if (avg_rssi > -60)
- init_vga -= 0x20;
- else if (avg_rssi > -70)
- init_vga -= 0x10;
-
- val = mt76_rr(dev, MT_BBP(AGC, 8));
- val &= 0xFFFF80FF;
- val |= init_vga << 8;
- mt76_wr(dev, MT_BBP(AGC,8), val);
+ u8 gain = dev->cal.agc_gain_cur[0] - dev->cal.agc_gain_adjust;
+ u32 val = 0x122c << 16 | 0xf2;
+
+ mt76_wr(dev, MT_BBP(AGC, 8),
+ val | FIELD_PREP(MT_BBP_AGC_GAIN, gain));
+}
+
+static void
+mt76x0_phy_update_channel_gain(struct mt76x02_dev *dev)
+{
+ bool gain_change;
+ u8 gain_delta;
+ int low_gain;
+
+ dev->cal.avg_rssi_all = mt76x02_phy_get_min_avg_rssi(dev);
+
+ low_gain = (dev->cal.avg_rssi_all > mt76x02_get_rssi_gain_thresh(dev)) +
+ (dev->cal.avg_rssi_all > mt76x02_get_low_rssi_gain_thresh(dev));
+
+ gain_change = (dev->cal.low_gain & 2) ^ (low_gain & 2);
+ dev->cal.low_gain = low_gain;
+
+ if (!gain_change) {
+ if (mt76x02_phy_adjust_vga_gain(dev))
+ mt76x0_phy_set_gain_val(dev);
+ return;
+ }
+
+ dev->cal.agc_gain_adjust = (low_gain == 2) ? 0 : 10;
+ gain_delta = (low_gain == 2) ? 10 : 0;
+
+ dev->cal.agc_gain_cur[0] = dev->cal.agc_gain_init[0] - gain_delta;
+ mt76x0_phy_set_gain_val(dev);
+
+ /* clear false CCA counters */
+ mt76_rr(dev, MT_RX_STAT_1);
}
static void mt76x0_phy_calibration_work(struct work_struct *work)
@@ -844,7 +866,7 @@ static void mt76x0_phy_calibration_work(struct work_struct *work)
struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
cal_work.work);
- mt76x0_dynamic_vga_tuning(dev);
+ mt76x0_phy_update_channel_gain(dev);
if (!mt76x0_tssi_enabled(dev))
mt76x0_temp_sensor(dev);