[PATCH 2/2] mt76: mt76x0: handle chip specific initval differences

[Felix Fietkau <nbd@xxxxxxxx>]

Some RF registers need different values for various chips.
For at least mt76x0_rf_central_tab registers, overwriting them later does
not work, as the wrong values can cause the entire system to hang on some
devices with MT7610E

Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
 .../wireless/mediatek/mt76/mt76x0/mt76x0.h    |  6 ++-
 .../net/wireless/mediatek/mt76/mt76x0/phy.c   | 47 ++++++++++++++++++-
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h b/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h
index 33475788bc26..989ed00c0b7a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h
@@ -33,8 +33,10 @@
 
 static inline bool is_mt7610e(struct mt76x02_dev *dev)
 {
-	/* TODO */
-	return false;
+	if (!mt76_is_mmio(dev))
+		return false;
+
+	return mt76_chip(&dev->mt76) == 0x7610;
 }
 
 static inline bool is_mt7630(struct mt76x02_dev *dev)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
index 10041e673c31..d294325221f3 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -775,13 +775,56 @@ static void mt76x0_phy_calibration_work(struct work_struct *work)
 				     MT_CALIBRATE_INTERVAL);
 }
 
+static void mt76x0_rf_patch_reg_array(struct mt76x02_dev *dev,
+				      const struct mt76_reg_pair *rp, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++) {
+		u32 reg = rp[i].reg;
+		u8 val = rp[i].value;
+
+		switch (reg) {
+		case MT_RF(0, 3):
+			if (mt76_is_mmio(dev)) {
+				if (is_mt7630(dev))
+					val = 0x70;
+				else
+					val = 0x63;
+			} else {
+				val = 0x73;
+			}
+			break;
+		case MT_RF(0, 21):
+			if (is_mt7610e(dev))
+				val = 0x10;
+			else
+				val = 0x12;
+			break;
+		case MT_RF(5, 2):
+			if (is_mt7630(dev))
+				val = 0x1d;
+			else if (is_mt7610e(dev))
+				val = 0x00;
+			else
+				val = 0x0c;
+			break;
+		default:
+			break;
+		}
+		mt76x0_rf_wr(dev, reg, val);
+	}
+}
+
 static void mt76x0_phy_rf_init(struct mt76x02_dev *dev)
 {
 	int i;
 	u8 val;
 
-	RF_RANDOM_WRITE(dev, mt76x0_rf_central_tab);
-	RF_RANDOM_WRITE(dev, mt76x0_rf_2g_channel_0_tab);
+	mt76x0_rf_patch_reg_array(dev, mt76x0_rf_central_tab,
+				  ARRAY_SIZE(mt76x0_rf_central_tab));
+	mt76x0_rf_patch_reg_array(dev, mt76x0_rf_2g_channel_0_tab,
+				  ARRAY_SIZE(mt76x0_rf_2g_channel_0_tab));
 	RF_RANDOM_WRITE(dev, mt76x0_rf_5g_channel_0_tab);
 	RF_RANDOM_WRITE(dev, mt76x0_rf_vga_channel_0_tab);
 	mt76x0_phy_rf_switch_band(dev, NULL);
-- 
2.17.0