wifi: mt76: mt7925: load the appropriate CLC data based on hardware type

[ Upstream commit f2027ef3f733d3f0bb7f27fa3343784058f946ab ]

Read the EEPROM to determine the hardware type and uses this to load the
correct CLC data.

Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20250304113649.867387-1-mingyen.hsieh@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/wireless/mediatek/mt76/mt7925/mcu.c

@@ -616,6 +616,54 @@ int mt7925_mcu_uni_rx_ba(struct mt792x_dev *dev,
 	return ret;
 }
 
+static int mt7925_mcu_read_eeprom(struct mt792x_dev *dev, u32 offset, u8 *val)
+{
+	struct {
+		u8 rsv[4];
+
+		__le16 tag;
+		__le16 len;
+
+		__le32 addr;
+		__le32 valid;
+		u8 data[MT7925_EEPROM_BLOCK_SIZE];
+	} __packed req = {
+		.tag = cpu_to_le16(1),
+		.len = cpu_to_le16(sizeof(req) - 4),
+		.addr = cpu_to_le32(round_down(offset,
+				    MT7925_EEPROM_BLOCK_SIZE)),
+	};
+	struct evt {
+		u8 rsv[4];
+
+		__le16 tag;
+		__le16 len;
+
+		__le32 ver;
+		__le32 addr;
+		__le32 valid;
+		__le32 size;
+		__le32 magic_num;
+		__le32 type;
+		__le32 rsv1[4];
+		u8 data[32];
+	} __packed *res;
+	struct sk_buff *skb;
+	int ret;
+
+	ret = mt76_mcu_send_and_get_msg(&dev->mt76, MCU_WM_UNI_CMD_QUERY(EFUSE_CTRL),
+					&req, sizeof(req), true, &skb);
+	if (ret)
+		return ret;
+
+	res = (struct evt *)skb->data;
+	*val = res->data[offset % MT7925_EEPROM_BLOCK_SIZE];
+
+	dev_kfree_skb(skb);
+
+	return 0;
+}
+
 static int mt7925_load_clc(struct mt792x_dev *dev, const char *fw_name)
 {
 	const struct mt76_connac2_fw_trailer *hdr;
@@ -624,13 +672,20 @@ static int mt7925_load_clc(struct mt792x_dev *dev, const char *fw_name)
 	struct mt76_dev *mdev = &dev->mt76;
 	struct mt792x_phy *phy = &dev->phy;
 	const struct firmware *fw;
+	u8 *clc_base = NULL, hw_encap = 0;
 	int ret, i, len, offset = 0;
-	u8 *clc_base = NULL;
 
 	if (mt7925_disable_clc ||
 	    mt76_is_usb(&dev->mt76))
 		return 0;
 
+	if (mt76_is_mmio(&dev->mt76)) {
+		ret = mt7925_mcu_read_eeprom(dev, MT_EE_HW_TYPE, &hw_encap);
+		if (ret)
+			return ret;
+		hw_encap = u8_get_bits(hw_encap, MT_EE_HW_TYPE_ENCAP);
+	}
+
 	ret = request_firmware(&fw, fw_name, mdev->dev);
 	if (ret)
 		return ret;
@@ -675,6 +730,10 @@ static int mt7925_load_clc(struct mt792x_dev *dev, const char *fw_name)
 		if (phy->clc[clc->idx])
 			continue;
 
+		/* header content sanity */
+		if (u8_get_bits(clc->type, MT_EE_HW_TYPE_ENCAP) != hw_encap)
+			continue;
+
 		phy->clc[clc->idx] = devm_kmemdup(mdev->dev, clc,
 						  le32_to_cpu(clc->len),
 						  GFP_KERNEL);

drivers/net/wireless/mediatek/mt76/mt7925/mt7925.h

@@ -147,9 +147,12 @@ enum mt7925_eeprom_field {
 	MT_EE_CHIP_ID =		0x000,
 	MT_EE_VERSION =		0x002,
 	MT_EE_MAC_ADDR =	0x004,
+	MT_EE_HW_TYPE =		0xa71,
 	__MT_EE_MAX =		0x9ff
 };
 
+#define MT_EE_HW_TYPE_ENCAP     GENMASK(1, 0)
+
 enum {
 	TXPWR_USER,
 	TXPWR_EEPROM,