mt76: mt7915: add txpower init for 6GHz

Add support to init txpower values of 6GHz band.
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: MeiChia Chiu <MeiChia.Chiu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c

@@ -282,8 +282,8 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 			if (!tssi_on)
 				target_power += eeprom[index + 1];
 		}
-	} else {
-		int group = mt7915_get_channel_group(chan->hw_value, is_7976);
+	} else if (chan->band == NL80211_BAND_5GHZ) {
+		int group = mt7915_get_channel_group_5g(chan->hw_value, is_7976);
 
 		if (is_7976) {
 			index = MT_EE_TX0_POWER_5G_V2 + chain_idx * 5;
@@ -295,6 +295,11 @@ int mt7915_eeprom_get_target_power(struct mt7915_dev *dev,
 			if (!tssi_on)
 				target_power += eeprom[index + 8];
 		}
+	} else {
+		int group = mt7915_get_channel_group_6g(chan->hw_value);
+
+		index = MT_EE_TX0_POWER_6G_V2 + chain_idx * 8;
+		target_power = is_7976 ? eeprom[index + group] : 0;
 	}
 
 	return target_power;
@@ -309,12 +314,14 @@ s8 mt7915_eeprom_get_power_delta(struct mt7915_dev *dev, int band)
 
 	if (band == NL80211_BAND_2GHZ)
 		offs = is_7976 ? MT_EE_RATE_DELTA_2G_V2 : MT_EE_RATE_DELTA_2G;
-	else
+	else if (band == NL80211_BAND_5GHZ)
 		offs = is_7976 ? MT_EE_RATE_DELTA_5G_V2 : MT_EE_RATE_DELTA_5G;
+	else
+		offs = is_7976 ? MT_EE_RATE_DELTA_6G_V2 : 0;
 
 	val = eeprom[offs];
 
-	if (!(val & MT_EE_RATE_DELTA_EN))
+	if (!offs || !(val & MT_EE_RATE_DELTA_EN))
 		return 0;
 
 	delta = FIELD_GET(MT_EE_RATE_DELTA_MASK, val);

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.h

@@ -25,8 +25,10 @@ enum mt7915_eeprom_field {
 	MT_EE_TX0_POWER_5G =	0x34b,
 	MT_EE_RATE_DELTA_2G_V2 = 0x7d3,
 	MT_EE_RATE_DELTA_5G_V2 = 0x81e,
+	MT_EE_RATE_DELTA_6G_V2 = 0x884, /* 6g fields only appear in eeprom v2 */
 	MT_EE_TX0_POWER_2G_V2 =	0x441,
 	MT_EE_TX0_POWER_5G_V2 =	0x445,
+	MT_EE_TX0_POWER_6G_V2 =	0x465,
 	MT_EE_ADIE_FT_VERSION =	0x9a0,
 
 	__MT_EE_MAX =		0xe00,
@@ -103,7 +105,7 @@ enum mt7915_sku_rate_group {
 };
 
 static inline int
-mt7915_get_channel_group(int channel, bool is_7976)
+mt7915_get_channel_group_5g(int channel, bool is_7976)
 {
 	if (is_7976) {
 		if (channel <= 64)
@@ -134,6 +136,15 @@ mt7915_get_channel_group(int channel, bool is_7976)
 	return 7;
 }
 
+static inline int
+mt7915_get_channel_group_6g(int channel)
+{
+	if (channel <= 29)
+		return 0;
+
+	return DIV_ROUND_UP(channel - 29, 32);
+}
+
 static inline bool
 mt7915_tssi_enabled(struct mt7915_dev *dev, enum nl80211_band band)
 {

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -312,6 +312,7 @@ mt7915_regd_notifier(struct wiphy *wiphy,
 
 	mt7915_init_txpower(dev, &mphy->sband_2g.sband);
 	mt7915_init_txpower(dev, &mphy->sband_5g.sband);
+	mt7915_init_txpower(dev, &mphy->sband_6g.sband);
 
 	mphy->dfs_state = MT_DFS_STATE_UNKNOWN;
 	mt7915_dfs_init_radar_detector(phy);
@@ -558,6 +559,7 @@ static void mt7915_init_work(struct work_struct *work)
 	mt7915_mac_init(dev);
 	mt7915_init_txpower(dev, &dev->mphy.sband_2g.sband);
 	mt7915_init_txpower(dev, &dev->mphy.sband_5g.sband);
+	mt7915_init_txpower(dev, &dev->mphy.sband_6g.sband);
 	mt7915_txbf_init(dev);
 }