mt76: report firmware version using ethtool

print fw_ver and build_ver members of struct mt76x02_fw_header, similarly
to what appears in the output of 'dmesg' when the MCU firmware is loaded.
Reported-by: Sid Hayn <sidhayn@gmail.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x0/usb.c

@@ -178,6 +178,7 @@ static int mt76x0u_load_firmware(struct mt76x0_dev *dev)
 	mt76_wr(dev, MT_USB_DMA_CFG, val);
 
 	ret = mt76x0u_upload_firmware(dev, hdr);
+	mt76x02_set_ethtool_fwver(&dev->mt76, hdr);
 	release_firmware(fw);
 
 	mt76_wr(dev, MT_FCE_PSE_CTRL, 1);

drivers/net/wireless/mediatek/mt76/mt76x02_mcu.c

@@ -211,3 +211,16 @@ int mt76x02_mcu_cleanup(struct mt76_dev *dev)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(mt76x02_mcu_cleanup);
+
+void mt76x02_set_ethtool_fwver(struct mt76_dev *dev,
+			       const struct mt76x02_fw_header *h)
+{
+	u16 bld = le16_to_cpu(h->build_ver);
+	u16 ver = le16_to_cpu(h->fw_ver);
+
+	snprintf(dev->hw->wiphy->fw_version,
+		 sizeof(dev->hw->wiphy->fw_version),
+		 "%d.%d.%02d-b%x",
+		 (ver >> 12) & 0xf, (ver >> 8) & 0xf, ver & 0xf, bld);
+}
+EXPORT_SYMBOL_GPL(mt76x02_set_ethtool_fwver);

drivers/net/wireless/mediatek/mt76/mt76x02_mcu.h

@@ -105,5 +105,7 @@ int mt76x02_mcu_function_select(struct mt76_dev *dev,
 				u32 val, bool wait_resp);
 int mt76x02_mcu_set_radio_state(struct mt76_dev *dev, bool on,
 				bool wait_resp);
+void mt76x02_set_ethtool_fwver(struct mt76_dev *dev,
+			       const struct mt76x02_fw_header *h);
 
 #endif /* __MT76x02_MCU_H */

drivers/net/wireless/mediatek/mt76/mt76x2_mcu.c

@@ -154,6 +154,7 @@ mt76pci_load_firmware(struct mt76x2_dev *dev)
 	}
 
 	dev_info(dev->mt76.dev, "Firmware running!\n");
+	mt76x02_set_ethtool_fwver(&dev->mt76, hdr);
 
 	release_firmware(fw);
 

drivers/net/wireless/mediatek/mt76/mt76x2u_mcu.c

@@ -261,6 +261,7 @@ static int mt76x2u_mcu_load_firmware(struct mt76x2_dev *dev)
 	/* enable FCE to send in-band cmd */
 	mt76_wr(dev, MT_FCE_PSE_CTRL, 0x1);
 	dev_dbg(dev->mt76.dev, "firmware running\n");
+	mt76x02_set_ethtool_fwver(&dev->mt76, hdr);
 
 out:
 	release_firmware(fw);