mt76: add mt76x02_get_rx_gain and mt76x02_get_lna_gain utility routines

Add mt76x02_get_rx_gain and mt76x02_get_lna_gain utility routines
for rx gain parsing. mt76x02_get_rx_gain and mt76x02_get_lna_gain
will be reused for eeprom parsing in mt76x0 driver

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
index edb0886..2377c75 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c
@@ -81,3 +81,57 @@ bool mt76x02_ext_pa_enabled(struct mt76_dev *dev, enum nl80211_band band)
                return !(conf0 & MT_EE_NIC_CONF_0_PA_INT_2G);
 }
 EXPORT_SYMBOL_GPL(mt76x02_ext_pa_enabled);
+
+void mt76x02_get_rx_gain(struct mt76_dev *dev, enum nl80211_band band,
+                        u16 *rssi_offset, s8 *lna_2g, s8 *lna_5g)
+{
+       u16 val;
+
+       val = mt76x02_eeprom_get(dev, MT_EE_LNA_GAIN);
+       *lna_2g = val & 0xff;
+       lna_5g[0] = val >> 8;
+
+       val = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_2G_1);
+       lna_5g[1] = val >> 8;
+
+       val = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_5G_1);
+       lna_5g[2] = val >> 8;
+
+       if (!mt76x02_field_valid(lna_5g[1]))
+               lna_5g[1] = lna_5g[0];
+
+       if (!mt76x02_field_valid(lna_5g[2]))
+               lna_5g[2] = lna_5g[0];
+
+       if (band == NL80211_BAND_2GHZ)
+               *rssi_offset = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_2G_0);
+       else
+               *rssi_offset = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_5G_0);
+}
+EXPORT_SYMBOL_GPL(mt76x02_get_rx_gain);
+
+u8 mt76x02_get_lna_gain(struct mt76_dev *dev,
+                       s8 *lna_2g, s8 *lna_5g,
+                       struct ieee80211_channel *chan)
+{
+       u16 val;
+       u8 lna;
+
+       val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1);
+       if (val & MT_EE_NIC_CONF_1_LNA_EXT_2G)
+               *lna_2g = 0;
+       if (val & MT_EE_NIC_CONF_1_LNA_EXT_5G)
+               memset(lna_5g, 0, sizeof(s8) * 3);
+
+       if (chan->band == NL80211_BAND_2GHZ)
+               lna = *lna_2g;
+       else if (chan->hw_value <= 64)
+               lna = lna_5g[0];
+       else if (chan->hw_value <= 128)
+               lna = lna_5g[1];
+       else
+               lna = lna_5g[2];
+
+       return lna != 0xff ? lna : 0;
+}
+EXPORT_SYMBOL_GPL(mt76x02_get_lna_gain);

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
index 70ca272..c22ca50 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
@@ -154,5 +154,10 @@ mt76x02_eeprom_get(struct mt76_dev *dev,
 bool mt76x02_ext_pa_enabled(struct mt76_dev *dev, enum nl80211_band band);
 int mt76x02_get_efuse_data(struct mt76_dev *dev, u16 base, void *buf,
                           int len, enum mt76x02_eeprom_modes mode);
+void mt76x02_get_rx_gain(struct mt76_dev *dev, enum nl80211_band band,
+                        u16 *rssi_offset, s8 *lna_2g, s8 *lna_5g);
+u8 mt76x02_get_lna_gain(struct mt76_dev *dev,
+                       s8 *lna_2g, s8 *lna_5g,
+                       struct ieee80211_channel *chan);
 
 #endif /* __MT76x02_EEPROM_H */

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x2_eeprom.c
index 2cc94c1..ef44074 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76x2_eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2_eeprom.c
@@ -310,55 +310,16 @@ void mt76x2_read_rx_gain(struct mt76x2_dev *dev)
 
        mt76x2_set_rx_gain_group(dev, val);
 
-       if (chan->band == NL80211_BAND_2GHZ) {
-               val = mt76x02_eeprom_get(&dev->mt76, MT_EE_RSSI_OFFSET_2G_0);
-               mt76x2_set_rssi_offset(dev, 0, val);
-               mt76x2_set_rssi_offset(dev, 1, val >> 8);
-       } else {
-               val = mt76x02_eeprom_get(&dev->mt76, MT_EE_RSSI_OFFSET_5G_0);
-               mt76x2_set_rssi_offset(dev, 0, val);
-               mt76x2_set_rssi_offset(dev, 1, val >> 8);
-       }
-
-       val = mt76x02_eeprom_get(&dev->mt76, MT_EE_LNA_GAIN);
-       lna_2g = val & 0xff;
-       lna_5g[0] = val >> 8;
-
-       val = mt76x02_eeprom_get(&dev->mt76, MT_EE_RSSI_OFFSET_2G_1);
-       lna_5g[1] = val >> 8;
-
-       val = mt76x02_eeprom_get(&dev->mt76, MT_EE_RSSI_OFFSET_5G_1);
-       lna_5g[2] = val >> 8;
-
-       if (!mt76x02_field_valid(lna_5g[1]))
-               lna_5g[1] = lna_5g[0];
-
-       if (!mt76x02_field_valid(lna_5g[2]))
-               lna_5g[2] = lna_5g[0];
+       mt76x02_get_rx_gain(&dev->mt76, chan->band, &val, &lna_2g, lna_5g);
+       mt76x2_set_rssi_offset(dev, 0, val);
+       mt76x2_set_rssi_offset(dev, 1, val >> 8);
 
        dev->cal.rx.mcu_gain =  (lna_2g & 0xff);
        dev->cal.rx.mcu_gain |= (lna_5g[0] & 0xff) << 8;
        dev->cal.rx.mcu_gain |= (lna_5g[1] & 0xff) << 16;
        dev->cal.rx.mcu_gain |= (lna_5g[2] & 0xff) << 24;
 
-       val = mt76x02_eeprom_get(&dev->mt76, MT_EE_NIC_CONF_1);
-       if (val & MT_EE_NIC_CONF_1_LNA_EXT_2G)
-               lna_2g = 0;
-       if (val & MT_EE_NIC_CONF_1_LNA_EXT_5G)
-               memset(lna_5g, 0, sizeof(lna_5g));
-
-       if (chan->band == NL80211_BAND_2GHZ)
-               lna = lna_2g;
-       else if (channel <= 64)
-               lna = lna_5g[0];
-       else if (channel <= 128)
-               lna = lna_5g[1];
-       else
-               lna = lna_5g[2];
-
-       if (lna == 0xff)
-               lna = 0;
-
+       lna = mt76x02_get_lna_gain(&dev->mt76, &lna_2g, lna_5g, chan);
        dev->cal.rx.lna_gain = mt76x02_sign_extend(lna, 8);
 }
 EXPORT_SYMBOL_GPL(mt76x2_read_rx_gain);