> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Update USB and Ethernet controller firmware

## Introduction

A firmware update to the USB controller may solve USB or Ethernet connectivity
issues on the Dragonwing RB3 Gen 2 device.

## Prerequisites

* Ensure that you upgrade the software as described in [Update the software]()
  before updating the Renesas firmware.
* Ensure that you install the ADB tool. Fastboot comes installed along with it.
* Connect the device to the Ubuntu host computer using a USB Type-C cable.

## Procedure

* Register and sign in to [Renesas](https://www.renesas.com).

* Download the firmware from
  [Renesas](https://www.renesas.com/us/en/products/interface/usb-switches-hubs/upd720201-usb-30-host-controller#design_development).

* Rename the downloaded firmware file to `renesas_usb_fw.mem`.

* Connect the device to the host computer using ADB.

* Push the firmware to the device using one of the following commands:

  ```bash theme={null}
  adb push renesas_usb_fw.mem /lib/firmware
  ```

  **OR**

  ```bash theme={null}
  scp renesas_usb_fw.mem root@<ip-address-of-device>:/lib/firmware
  ```

  ```bash Sample command theme={null}
  scp renesas_usb_fw.mem root@10.92.175.138:/lib/firmware
  ```

* Activate the firmware using either of the following options:

  * Reboot target for USB type A ports.
  * Manually bind the Renesas xHCI driver:

  ```bash theme={null}
  echo "0001:04:00.0" > /sys/bus/pci/drivers/xhci-pci-renesas/bind
  ```

* Retrieve the device ID:

  ```bash theme={null}
  sh-5.3# lspci
  ```

  In the following sample output, `0001:04:00.0` is the device ID:

  ```text Sample output theme={null}
  0001:00:00.0 PCI bridge: Qualcomm Technologies, Inc SM8250 PCIe Root Complex [Snapdragon 865/870 5G]
  0001:01:00.0 PCI bridge: Toshiba Corporation Device 0623
  0001:02:01.0 PCI bridge: Toshiba Corporation Device 0623
  0001:02:02.0 PCI bridge: Toshiba Corporation Device 0623
  0001:02:03.0 PCI bridge: Toshiba Corporation Device 0623
  0001:04:00.0 USB controller: Renesas Electronics Corp. uPD720201 USB 3.0 Host Controller (rev 03)
  0001:05:00.0 Ethernet controller: Toshiba Corporation Device 0220
  0001:05:00.1 Ethernet controller: Toshiba Corporation Device 0220
  ```

* Verify firmware enumeration:
  ```bash theme={null}
  dmesg
  ```