Introduction

Parade USB hubs such as PS5512 have a built-in SPI-Master engine for programming external SPI ROM flash. The USB2.0 hub device can do control transfers to control an internal mailbox.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a packed binary file format.

This plugin supports the following protocol ID:

• com.paradetech.usbhub

GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

• USB\VID_273F&PID_1001

Update Behavior

• Load 384KB SPI ROM data buffer
• Specify target SPI ROM bank, ex: HUB_FW#1 or HUB_FW#2
• Set UFP Disconnect Flag register to notify firmware that we are doing firmware update
• Acquire SPI Master
• Unprotect SPI ROM bank
• Erase SPI ROM bank
• Update SPI ROM bank
• Protect SPI ROM bank
• Verify checksum for the just updated SPI ROM bank

It takes around 90 seconds to update the FW#1 64KB firmware. FW#2 is the factory default with a known good firmware. Please do a full power cycle to make new firmware take effect.

Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to USB:0x273F

Quirk Use

This plugin uses the following plugin-specific quirks:

External Interface Access

This plugin requires read/write access to /dev/bus/usb.

Version Considerations

This plugin has been available since fwupd version 2.0.0.

Owners

Anyone can submit a pull request to modify this plugin, but the following people should be consulted before making major or functional changes:

• Hub Lin: hublin2024
• Jimmy Tu: jimmytu5167
• Andy Chu: andychu5168